| 1. |
- Boström, Mathias, et al.
(författare)
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Casimir attractive-repulsive transition in MEMS
- 2012
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Ingår i: European Physical Journal B. - : Springer Science and Business Media LLC. - 1434-6028 .- 1434-6036. ; 85:11, s. 377-
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Tidskriftsartikel (refereegranskat)abstract
- Unwanted stiction in micro-and nanomechanical (NEMS/MEMS) systems due to dispersion (van der Waals, or Casimir) forces is a significant hurdle in the fabrication of systems with moving parts on these length scales. Introducing a suitably dielectric liquid in the interspace between bodies has previously been demonstrated to render dispersion forces repulsive, or even to switch sign as a function of separation. Making use of recently available permittivity data calculated by us we show that such a remarkable nonmonotonic Casimir force, changing from attractive to repulsive as separation increases, can in fact be observed in systems where constituent materials are in standard NEMS/MEMS use requiring no special or exotic materials. No such nonmonotonic behaviour has been measured to date. We calculate the force between a silica sphere and a flat surface of either zinc oxide or hafnia, two materials which are among the most prominent for practical microelectrical and microoptical devices. Our results explicate the need for highly accurate permittivity functions of the materials involved for frequencies from optical to far-infrared frequencies. A careful analysis of the Casimir interaction is presented, and we show how the change in the sign of the interaction can be understood as a result of multiple crossings of the dielectric functions of the three media involved in a given set-up.
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| 2. |
- Boström, Mathias, et al.
(författare)
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Casimir force between atomically thin gold films
- 2013
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Ingår i: European Physical Journal B. - : Springer Science and Business Media LLC. - 1434-6028 .- 1434-6036. ; 86:2, s. 43-
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Tidskriftsartikel (refereegranskat)abstract
- We have used density functional theory to calculate the anisotropic dielectric functions for ultrathin gold sheets (composed of 1, 3, 6, and 15 atomic layers). Such films are important components in nano-electromechanical systems. When using correct dielectric functions rather than bulk gold dielectric functions we predict an enhanced attractive Casimir-Lifshitz force (at most around 20%) between two atomically thin gold sheets. For thicker sheets the dielectric properties and the corresponding Casimir forces approach those of gold half-spaces. The magnitude of the corrections that we predict should, within the today's level of accuracy in Casimir force measurements, be clearly detectable.
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| 3. |
- Popović-Bijelić, Ana, 1976-, et al.
(författare)
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Ribonucleotide reductase inhibition by metal complexes of Triapine (3-aminopyridine-2-carboxaldehyde thiosemicarbazone) : A combined experimental and theoretical study
- 2011
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Ingår i: European Journal of Inorganic Chemistry. - : Elsevier. - 1434-1948 .- 1099-1948 .- 0162-0134. ; 105:11, s. 1422-1431
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Tidskriftsartikel (refereegranskat)abstract
- Triapine (3-aminopyridine-2-carboxaldehyde thiosemicarbazone, 3-AP) is currently the most promising chemotherapeutic compound among the class of α-N-heterocyclic thiosemicarbazones. Here we report further insights into the mechanism(s) of anticancer drug activity and inhibition of mouse ribonucleotide reductase (RNR) by Triapine. In addition to the metal-free ligand, its iron(III), gallium(III), zinc(II) and copper(II) complexes were studied, aiming to correlate their cytotoxic activities with their effects on the diferric/tyrosyl radical center of the RNR enzyme in vitro. In this study we propose for the first time a potential specific binding pocket for Triapine on the surface of the mouse R2 RNR protein. In our mechanistic model, interaction with Triapine results in the labilization of the diferric center in the R2 protein. Subsequently the Triapine molecules act as iron chelators. In the absence of external reductants, and in presence of the mouse R2 RNR protein, catalytic amounts of the iron(III)–Triapine are reduced to the iron(II)–Triapine complex. In the presence of an external reductant (dithiothreitol), stoichiometric amounts of the potently reactive iron(II)–Triapine complex are formed. Formation of the iron(II)–Triapine complex, as the essential part of the reaction outcome, promotes further reactions with molecular oxygen, which give rise to reactive oxygen species (ROS) and thereby damage the RNR enzyme. Triapine affects the diferric center of the mouse R2 protein and, unlike hydroxyurea, is not a potent reductant, not likely to act directly on the tyrosyl radical.
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| 4. |
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| 5. |
- Kennergren, Charles, 1948, et al.
(författare)
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A single-centre experience of over one thousand lead extractions.
- 2009
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Ingår i: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. - : Oxford University Press (OUP). - 1532-2092. ; 11:5, s. 612-7
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: The aim of the study was to present a single-centre experience of pacemaker and implantable cardioverter defibrillator (ICD) lead extraction using different methods, mainly laser-assisted extraction. METHODS AND RESULTS: Data from 1032 leads and 647 procedures were gathered. A step-by-step approach using different techniques while performing an ongoing risk-benefit analysis was used. The most common indications were local infection, systemic infection, non-functional lead, elective lead replacement, and J-wire fracture. Mean implantation time for all leads was 69 months and for laser-extracted leads 91 months. Laser technique was used to extract 60% of the leads, 29% were manually extracted, 6% extracted with mechanical tools, 4% were surgically removed, and 0.6% extracted by a femoral approach. Failure rate was 0.7%, and major complication rate was 0.9%. No extraction-related mortality occurred. Median time for laser extraction was 2 min. Long implantation time was not a risk factor for failure or for complication. CONCLUSION: Pacing and ICD leads can safely, successfully, and effectively be extracted. Leads can often be extracted by a superior transvenous approach; however, open-chest and femoral extractions are still required. Laser-assisted lead extraction proved to be a useful technique to extract leads that could not be removed by manual traction. The results indicate that the paradigm of abandoning redundant leads, instead of removing them, may have to be reconsidered.
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| 6. |
- Kennergren, Charles, 1948
(författare)
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Cardiac implantable electronic device treatment: taking care of complications.
- 2009
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Ingår i: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. - : Oxford University Press (OUP). - 1532-2092. ; 11:11, s. 1419-20
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Kennergren, Charles, 1948, et al.
(författare)
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Laser-assisted lead extraction: the European experience.
- 2007
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Ingår i: Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. - : Oxford University Press (OUP). - 1099-5129. ; 9:8, s. 651-6
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: The aim of this study is to investigate the safety and effectiveness of Excimer laser-assisted lead extraction in Europe. The final European multi-centre study experience is presented. METHOD AND RESULTS: The Excimer is a cool cutting laser (50 degrees C) with a wavelength of 308 nm. The energy is emitted from the tip of a flexible sheath and is absorbed by proteins and lipids, 64% of the energy is absorbed at a tissue depth of 0.06 mm. The sheath is positioned over the lead, and the fibrosis surrounding the lead is vaporized while advancing the sheath without damaging other leads. From August 1996 to March 2001, 383 leads (170 atrial, 213 ventricular) in 292 patients (mean age 61.6 years, range 13-96) were extracted at 14 European centres. Mean implantation time was 74 months (3-358). Most frequent indications were pocket infection (26%), non-functional leads (21%), patient morbidity (21%), septicaemia or endocarditis (14%), erosion (5%), and lead interference (8%). Median extraction time was 15 min (1-300). Complete extraction was achieved in 90.9% of the leads and partial extraction in 3.4%. Extraction failed in 5.7% of the leads. Major complications = perforations caused 10/22 (3.4/5.7%) of the failures. Most partially extracted patients were considered clinically successful, as only minor lead parts without clinical significance were left. Femoral non-laser technique was used to remove 8/12 of the non-complication failures. The total complication rate, including five minor complications (1.7%), was 5.1%. No in-hospital mortality occurred. CONCLUSION: Pacing and implantable cardioverter-defibrillator leads can safely, effectively, and predictably be extracted. Open-heart extractions can be limited to special cases. The results indicate that the traditional policy of abandoning redundant leads, instead of removing them, may be obsolete in many patients.
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| 8. |
- Olofsson, Sigvard, 1948, et al.
(författare)
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Viral O-GalNAc peptide epitopes: a novel potential target in viral envelope glycoproteins.
- 2016
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Ingår i: Reviews in medical virology. - : Wiley. - 1099-1654 .- 1052-9276. ; 26:1, s. 34-48
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Tidskriftsartikel (refereegranskat)abstract
- Viral envelope glycoproteins are major targets for antibodies that bind to and inactivate viral particles. The capacity of a viral vaccine to induce virus-neutralizing antibodies is often used as a marker for vaccine efficacy. Yet the number of known neutralization target epitopes is restricted owing to various viral escape mechanisms. We expand the range of possible viral glycoprotein targets, by presenting a previously unknown type of viral glycoprotein epitope based on a short peptide stretch modified with small O-linked glycans. Besides being immunologically active, these epitopes have a high potential for antigenic variation. Thus, sera from patients infected with EBV develop individual IgG responses addressing the different possible glycopeptide glycoforms of one short peptide backbone that reflect individual variations in the course of virus infection. In contrast, in HSV type 2 meningitis patients, CSF antibodies are focussed to only one single glycoform peptide of a major viral glycoprotein. Thus, dependent on the viral disease, the serological response may be variable or constant with respect to the number of targeted peptide glycoforms. Mapping of these epitopes relies on a novel three-step procedure that identifies any reactive viral O-glycosyl peptide epitope with respect to (i) relevant peptide sequence, (ii) the reactive glycoform out of several possible glycopeptide isomers of that peptide sequence, and (iii) possibly tolerated carbohydrate or peptide structural variations at glycosylation sites. In conclusion, the viral O-glycosyl peptide epitopes may be of relevance for development of subunit vaccines and for improved serodiagnosis of viral diseases.
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| 9. |
- Raak, Ragnhild, 1948-, et al.
(författare)
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Coping strategies and life satisfaction in subgrouped fibromyalgia patients
- 2003
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Ingår i: Biological Research for Nursing. - : SAGE Publications. - 1099-8004 .- 1552-4175. ; 4:3, s. 193-202
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Tidskriftsartikel (refereegranskat)abstract
- The present study describes pain- and stress-coping strategies and life satisfaction in subgroups of fibromyalgia patients. Thirty-two females with fibromyalgia syndrome (FMS) and 21 healthy pain-free women were studied. Those with FMS were classified as thermal (both heat and cold) pain sensitive or slightly cold pain sensitive based on pain thresholds determined using a Thermotest device. Global stress-coping styles, life satisfaction, and specific pain-coping strategies were measured. Patients classified as thermal pain sensitive were affected by physical symptoms to a greater extent than were those classified as slightly cold pain sensitive. The thermal pain sensitive group used more diverting attention coping strategies than the slightly cold pain sensitive group did. Separating fibromyalgia patients into subgroups might increase the potential for improving nursing care of these patients. Through the use of effective coping strategies in dealing with stress and pain, life satisfaction may also be enhanced.
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| 10. |
- Raak, Ragnhild, 1948-, et al.
(författare)
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Thermal thresholds and catastrophizing in individuals with chronic pain after whiplash injury
- 2006
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Ingår i: Biological Research for Nursing. - : SAGE Publications. - 1099-8004 .- 1552-4175. ; 8:2, s. 138-146
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Tidskriftsartikel (refereegranskat)abstract
- Thermal sensitivity, thermal pain thresholds, and catastrophizing were examined in individuals with whiplash associated disorders (WAD) and in healthy pain-free participants. Quantitative sensory testing (QST) was used to measure skin sensitivity to cold and warmth and cold and heat pain thresholds over both the thenar eminence and the trapezius muscle (TrM) in 17 participants with WAD (age 50.8± 11.3 years) and 18 healthy participants (age 44.8± 10.2 years). The Pain Catastrophizing Scale (PCS) was used to determine pain coping strategies, and visual analogue scales were used for self-assessment of current background pain in individuals in the WAD group as well as experienced pain intensity and unpleasantness after QST and sleep quality in all participants. There were significant differences in warmth threshold and cold and heat pain thresholds of the TrM site between the WAD and pain-free groups. Significant differences between the two groups were also found for the catastrophizing dimension of helplessness in the PCS and in self-assessed quality of sleep. A correlational analysis showed that current background pain is significantly correlated with both cold discrimination and cold pain threshold in the skin over the TrM in individuals with WAD. These findings imply that thermal sensitivity is an important factor to consider in providing nursing care to individuals with WAD. Because biopsychosocial factors also influence the experience of pain in individuals with WAD, the role of nurses includes not only the description of the pain phenomenon but also the identification of relieving and aggravating factors.
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| 11. |
- Salander, Pär, 1948-
(författare)
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Attributions of lung cancer : my own illness is hardly caused by smoking
- 2007
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Ingår i: Psycho-Oncology. - : Wiley. - 1057-9249 .- 1099-1611. ; 16:6, s. 587-592
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Tidskriftsartikel (refereegranskat)abstract
- People experiencing unexpected negative events tend to make sense of the situation through causal attributions. It seems that having some sort of answer to “why-me” makes the event less shattering and the world more controllable. We know for instance that the great majority of women with breast cancer tend to have clear ideas about its causes. Lung cancer, in contrast to breast cancer, has a well-known significant cause, as smoking explains about 80% of the incidence. This paper deals with the attribution process in lung cancer. It examines how lung cancer patients attribute the cause to their disease and how this relates to an understanding of how people deal with strain. Twenty-three patients with advanced non-small-cell lung cancer were consecutively followed by means of repeated interviews throughout the course of the disease. It emerged that among the smokers the most common attribution was “don’t know” – smoking was not seen as the prime cause to their cancer. This finding is discussed in relation to the few earlier somewhat contradictory studies that exist and it is argued that the finding is according well with the concept of ‘disavowal’ being the central process concerned in dealing with strain.
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| 12. |
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| 13. |
- Salander, Pär, 1948-, et al.
(författare)
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Gender differences in patient´s written narratives when being diagnosed with cancer
- 2005
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Ingår i: Psycho-Oncology. - : John Wiley & Sons. - 1057-9249 .- 1099-1611. ; 14:8, s. 685-695
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Tidskriftsartikel (refereegranskat)abstract
- The medical field has shown a growing interest in gender and gender differences. In psychosocial oncology, for example, some studies suggest that men and women cope differently with cancer; e.g. women express their emotions more readily than men do, and men rely more on their healthy spouse.Using a qualitative perspective, this study examines 83 narratives written by male and female cancer patients who were asked to write down how they experienced receiving their cancer diagnosis. The narratives were analyzed both as to structure and content.The women wrote longer, more personally, and more emotionally than the men, and to a greater extent they included family members and other relatives in their stories. When the men mentioned relatives, they mainly referred to their spouse. Men and women commented differently as to their experiences of ‘reception’; i.e. how their psychological needs were addressed and ‘connection’; i.e. whether they felt in sufficient contact with medical staff. Although the women described good reception, they complained a lot about bad connection. Among the men, it was just as common to report about positive as negative experiences in both categories.There are reasons to be cautious when evaluating these findings. The found differences may be due to different ways of reacting to similar situations or different willingness and ways of commenting on similar situations, but also to different reception and connection for men and women. Further research should focus on the basic question: Are men and women without medical reasons being treated differently during their oncological treatment?
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| 14. |
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| 15. |
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| 16. |
- Salander, Pär, 1948-
(författare)
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Motives that cancer patients in oncological care have for consulting a psychologist : an empirical study
- 2010
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Ingår i: Psycho-Oncology. - : Wiley. - 1057-9249 .- 1099-1611. ; 19:3, s. 248-254
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Tidskriftsartikel (refereegranskat)abstract
- Objective: Most people with cancer are able to deal with the mental turmoil with support from ordinary health care, family and friends. However, by themselves or by attentive health-care workers some patients are referred to specialists within the psychosocial field, foremost social workers and psychologists. This paper deals with patients’ motives for seeing a psychologist. Methods: The case books for all patients who had met with the psychologist at a department of oncology in Sweden during a 10-year period were read through and categorised according to what the patients wanted to talk about. Results: The most commonly found motives were in sliding order: coping with anxiety and worries caused by the disease; dealing with relational problems in life outside the disease; dealing with relational problems actualised by the disease; living with a malignant diseasedespair in a new life situation; and finally dealing with a particular problem. Conclusion: Patients seeing a psychologist in oncology do not just ask for help to come to terms with anxiety and worries. More than a third of the patients wanted to talk about distressing relationships, which were not connected to, or only remotely connected to the cancer disease. Patients have different needs and competence in different psychological treatment perspectives is therefore important. The found diversity of motives bears impact on the external validity of screening instruments for distress and randomised controlled intervention studies.
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| 17. |
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| 18. |
- Salander, Pär, 1948-
(författare)
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"Spirituality" hardly facilitates our understanding of existential distress - but "everyday life" might
- 2018
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Ingår i: Psycho-Oncology. - : John Wiley & Sons. - 1057-9249 .- 1099-1611. ; 27:11, s. 2654-2656
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Tidskriftsartikel (refereegranskat)abstract
- The existential predicament of being human might come to the fore when we are stricken by cancer, perhaps primarily because we are removed from the shelter inherent in our routines of everyday life. These routines might help us to deal with the ultimate concerns of life, ie, isolation, freedom, meaninglessness, and death.1 We recognise these conceptualisations from European existential philosophy. However, instead of discussing the existential challenge in these terms, it has become far more popular in the scientific literature to instead make use of “spirituality” as a frame of reference. Broadly speaking, there has been a roughly 26‐fold increase in the number of papers focused on “spirituality” from the 1980s to the 2000s,2 and nearly all studies on “spiritual care” have emanated from the United States and the United Kingdom.3In this paper, I will briefly scrutinise the concept of “spirituality” first by critically reflecting on how the concept is constructed, defined, and made use of; in other words, what are “spirituality” researchers talking about? Second, I will question its validity, and third I will question the legitimacy of the cherished research concluding that “spirituality” alleviates distress and promotes well‐being. Finally, I will briefly, as roughly outlined above, suggest that “everyday life,” a bottom‐up perspective grounded in the patients' way of living their lives, might be a more fruitful conceptualisation that we should pay attention to in order to widen our scope when it comes to understanding how patients deal with distress.
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| 19. |
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| 20. |
- Salander, Pär, 1948-
(författare)
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Who needs the concept of spirituality?
- 2006
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Ingår i: Psycho-Oncology. - 1057-9249 .- 1099-1611. ; 15:7, s. 647-9
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 21. |
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| 22. |
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| 23. |
- Algarra, Andres G.
(författare)
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Computational Insights into the Isomerism of Hexacoordinate Metal-Sarcophagine Complexes : The Relationship between Structure and Stability
- 2015
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :3, s. 503-511
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Tidskriftsartikel (refereegranskat)abstract
- The hexacoordinate complexes that the macrobicyclic ligands {(NH3)(2)sar)(2+) and {NMe3)(2)sar}(2+) (sar = 3,6,10,13,16,19-hexaazabicyclo[6.6.6]icosane) form with transition metals such as Co-III, Co-II and Cu-II can adopt several isomeric structures. In this article, we have firstly employed DFT methods lo compute the relative stability of their Delta-ob(3), Delta-ob(2)lel, Delta-lel(2)ob and Delta-lel(3) isomers, as well as the activation barriers for their interconversion. In agreement with the experimental data, the results show that, in general, the different isomers of the Co-III and Co-II complexes present similar free energies, whereas the Cu-II complexes show a strong tendency towards the lel(3) form. In addition, the interplay between the structure and stability of these species has been studied by combining shape maps with a distortion/interaction energy analysis. In contrast to the geometries close to the ideal octahedron that all the studied Co complexes present, the le)3 structures of [Cu{(NH3)(2)sar}](4+) and [Cu{(NMe3)(2)sar](4+) are better described. as trigonal prisms. In such structures the ligand adopts a conformation significantly more stable than in the other isomers, and this drives the formation of lel(3)-[Cu{(NH3)(2)sar}](4+) and lel(3)-[Cu{(NNe3)(2)sar}](4+). Overall, the results show a clear relationship between the stability of a given isomer and its degree of distortion with respect to the ideal octahedron (or trigonal prism), with the latter being ultimately dependent on the transition metal and its radius.
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| 24. |
- Ali, Sk Imran, et al.
(författare)
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Synthesis and Magnetic Properties of the Ternary Oxofluoride Fe3Sb4O6F6
- 2020
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; 2020:39, s. 3746-3752
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Tidskriftsartikel (refereegranskat)abstract
- The new compound Fe(3)Sb(4)O(6)F(6)was prepared by hydrothermal synthesis and its crystal structure was determined from single-crystal X-ray diffraction data. The synthesis was made under slightly basic conditions to prevent oxidation of Fe(2+)to Fe3+. The compound crystallizes in the cubic space groupI-43mwith separate crystallographic sites for Fe(2+)and Sb3+. Fe(3)Sb(4)O(6)F(6)is isostructural with M3Sb4O6F6(M = Co, Ni, Zn). The crystal structure is comprising distorted [FeO2F4] octahedra connected via corner sharing at F-atoms and [SbO3] trigonal pyramids that form [Sb4O6] units that connect via O-atoms to the Fe-atoms. Mossbauer spectroscopy measurements on the hydrothermal synthesis products prove the majority phase contains Fe in the oxidation state +2. Powder X-ray diffraction suggests that an additional phase of the Mossbauer sample containing Fe(3+)can be attributed to FeSbO(2)F(2)as secondary phase. Fe(3)Sb(4)O(6)F(6)exhibits antiferromagnetic order below ca. 72 K succeeded by a second magnetic phase transition at ca. 30 K. Strong antiferromagnetic spin-exchange interaction is attributed to 180 degrees Fe-F-Fe superexchange pathways identified in the crystal structure.
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| 25. |
- Anderlund, Magnus F., et al.
(författare)
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Redox chemistry of a dimanganese(II,III) complex with an unsymmetric ligand : Water binding, deprotonation and accumulative light-induced oxidation
- 2006
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :24, s. 5033-5047
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Tidskriftsartikel (refereegranskat)abstract
- A dinuclear manganese complex {[(Mn2L)-L-II,IIII(mu-OAc)(2)]-ClO4} has been synthesised, where L is the dianion of 2-{[bis-(pyrid-2-ylmethyl)amino]methyl}-6-{[(3,5-di-tert-butyl-2- hydroxybenzyl)(pyrid-2-ylmethyl)amino]methyl)-4-methylphenol, an unsymmetric binucleating ligand with two coordinating phenol groups. The two manganese ions, with a Mn-Mn distance of 3.498 angstrom, are bridged by the two bidentate acetate ligands and the 4-methylphenolate group of the ligand, resulting in a N3O3 and N2O4 donor set of Mn-II and Mn-II, respectively. Electrochemically [Mn2(II,III)L(mu-OAc)(2)](+) is reduced to [(Mn2L)-L-II,II(mu-OAc)(2)] at E-1/2(1)=-0.53 V versus Fc(+/0) and oxidised to [(Mn2L)-L-III,III(mu-OAC)(2)](2+) at E-1/2(2)=0.38 V versus Fc(+/0). All three redox states have been characterised by EPR, IR and UV/Vis spectroscopy. Subsequent oxidation of [(Mn2L)-L-II,III(mu-OAc)(2)](2+) [E-1/2(3)=0.75 V vs. Fc(+/0)] in dry acetonitrile results in an unstable primary product with a lifetime of about 100 ins. At high scan rates quasireversible voltammetric behaviour is found for all three electrode processes, with particularly slow electron transfer for the II,III/II,II [k(o)(1) = 0.002 cms(-1) and III,III/II,III [k(o)(2) = 0.005 cms(-1)] couples, which can be rationalised in terms of major distortions of the Mn-II centres. In aqueous media the bridging acetates are replaced by water-derived ligands. Deprotonation of these stabilises higher valence states, and photo-induced oxidation of the manganese complex results in a (Mn2L)-L-IlI,IV complex with oxo or hydroxo bridging ligands, which is further oxidised to an EPR-silent product. These results demonstrate that a larger number of metal-centred oxidations can be compressed in a narrow potential range if build up of charge is avoided by charge-compensating reactions.
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| 26. |
- Andersson, Claes-Henrik, et al.
(författare)
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Synthesis and IR Spectroelectrochemical Studies of a [60]Fulleropyrrolidine-(tricarbonyl)chromium Complex : Probing C-60 Redox States by IR Spectroscopy
- 2011
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Ingår i: European Journal of Inorganic Chemistry. - : John Wiley & Sons. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :11, s. 1744-1749
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Tidskriftsartikel (refereegranskat)abstract
- The synthesis of a new fulleropyrrolidine-(tricarbonyl)chromium complex: 1-methyl-2-(4-methoxyphenyl)-3,4-[60]fulleropyrrolidine-(tricarbonyl)chromium is described together with its characterization by IR, NMR and cyclic voltammetry. IR spectro-electrochemistry has been used to probe the redox level of the fullerene derivative via the relative position of the vibrational bands of the CO ligands, which are sensitive to the electronic state of the complex. Other strategies to incorporate a tricarbonylchromium moiety to fullerene C60 are also briefly discussed and evaluated.
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| 27. |
- Andersson, Lena, et al.
(författare)
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Methodological aspects on measurement of Clara cell protein in urine as a biomarker for airway toxicity, compared with serum levels.
- 2007
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Ingår i: Journal of applied toxicology : JAT. - : Wiley. - 0260-437X .- 1099-1263. ; 27:1, s. 60-6
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Tidskriftsartikel (refereegranskat)abstract
- The Clara cell protein CC16, secreted from Clara cells in the lung, is discussed as a potential biomarker for toxic effects on the airways. An increased concentration of CC16 in serum may be caused by increased permeability of the lungs, caused by high levels of air pollution. Since CC16 is eliminated by renal excretion, it may be possible to use urine instead of serum samples. Few studies have been conducted on urinary CC16 (U-CC16), however.The aim was to investigate the optimal way of sampling and quantifying CC16 in urine samples and compare CC16 in human serum and urinary samples. Repeated sampling was performed in two groups of healthy subjects. First morning urine, 24 h urine, and matched blood and urine samples were collected.The excretion of U-CC16 increased over the day, e.g. from 0.08 microg h(-1) in the morning to 0.28 microg h(-1) in daytime and 0.16 microg h(-1) in the evening (medians in males). Morning samples (microg h(-1)) from males properly reflected the 24 h excretion (r = 0.91). The best correlation with 24 h excretion was obtained with creatinine-corrected first morning urine samples (r > 0.9). Generally, females had lower excretion of CC16 than males (medians 2.5 microg 24 h(-1) in females and 16 microg 24 h(-1) in males). There was significant intraindividual variation, but the interindividual variation was larger in both groups. There was an association between serum CC16 (S-CC16) and U-CC16 in morning samples. With optimal methods for sampling U-CC16, urine samples may be used in experimental studies of air pollution.
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| 28. |
- Appelquist, Karin, 1979, et al.
(författare)
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Character and origin of variably deformed granitoids in central southern Sweden: implications from geochemistry and Nd isotopes
- 2011
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Ingår i: Geological Journal. - : Wiley. ; 46:6, s. 597-618
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Tidskriftsartikel (refereegranskat)abstract
- We present major and trace element data for eighteen 1.71–1.66 Ga granitoid samples, and Sm–Nd whole‐rock isotope data for eleven of these samples, in a transect across the border between the Transscandinavian Igneous Belt (TIB) and the Eastern Segment in central southern Sweden. The geochemistry of the granitoids varies from alkalic to alkali‐calcic and peraluminous in the east to predominantly calc‐alkaline and metaluminous in the west. Rocks in the west also have lower SiO2 contents. Trace element signatures favour formation in an active continental margin setting. Nd isotope data are completely overlapping along the transect and initial εNd values are mildly depleted in the range +0.3 to +2.6. The combined data suggest that the magmas were derived mainly from juvenile, pre‐existing crust, increasingly mafic and less alkaline towards the west.
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| 29. |
- Arkhypchuk, Anna I., et al.
(författare)
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Tuning the Optical Properties of 1,1'-Biphospholes by Chemical Alterations of the P-P Bridge
- 2014
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; 2014:10, s. 1760-1766
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Tidskriftsartikel (refereegranskat)abstract
- 2,5-Di(1-naphthyl)-1-phenylphosphole (2) was prepared from phenylphosphine and dinaphthylbutadiyne in 70% yield, and oxidized to its oxide 3. Treatment of 2 with a solution of potassium naphthalide results in selective formation of phospholide anion 4, which can be oxidized with iodine to afford biphosphole 5. The crystal structure of 5 exhibits an unusual s-trans conformation across the P-P bridge that is most stabilized by - stacking of the naphthyl substituents. Biphosphole 5 can be oxidized to its mono-oxidized 6 and dioxide 7. Generally, all phosphole oxidations lead to decreased pyramidalization of the P centres and, consequently, to significantly redshifted lowest-energy absorption maxima. Mono-oxidized biphosphole 6, which consists of an ordinary phosphole and an electron-deficient oxidized phosphole, features a unique low-energy optical transition (shoulder at 430 nm), which is tentatively assigned to a charge-transfer transition. The UV/Vis spectrum of dioxide 7 lacks this transition. At the same time, the emission maximum of 7 is bathochromically shifted by 80 nm relative to that of 5.
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| 30. |
- Bányai, István, et al.
(författare)
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On the Nature of VV Species in Hydrophilic Ionic Liquids: A Spectroscopic Approach
- 2008
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :34, s. 5373-81
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Tidskriftsartikel (refereegranskat)abstract
- Heteronuclear NMR experiments, in particular 51V, wereperformed with the aim to elucidate the nature of vanadates and peroxovanadates in hydrophilic ionic liquids (i.e., [bmim][BF4], [bmim][TfO] and [bdmim][BF4]). The data so far reported clearly indicate that ionic liquids have a strong influence on the solution chemistry of vanadate in water both for the formation of the aggregates (with and without H2O2) and for the rate of peroxide consumption catalyzed by vanadium. In BF4- containing ionic liquids, formation of vanadate-fluoride adducts is suggested. The obtained results are also discussed in the light of the reactivity data of peroxovanadates in ionic liquids.
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| 31. |
- Bartoszewicz, Agnieszka, 1983-, et al.
(författare)
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Synthesis of β-Hydroxy and β-Amino Ketones from Allylic Alcohols Catalyzed by Ru(η5-C5Ph5)(CO)2Cl
- 2012
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :9, s. 1517-1530
-
Tidskriftsartikel (refereegranskat)abstract
- An efficient method for the synthesis of beta-hydroxy and beta-amino ketones from allylic alcohols catalyzed by Ru(5-C5Ph5)(CO)2Cl is described. The influence of the stereoelectronic properties of the catalyst on the reaction outcome has been studied. Optimization of the reaction conditions supressed the formation of undesired side products such as saturated ketones, benzyl alcohols, and a,beta-unsaturated ketones. Several aromatic and aliphatic allylic alcohols have been reacted with a large variety of aldehydes or imines to produce beta-hydroxy ketones or beta-amino ketones, respectively, in yields up to 99%. Based on experimental data, a mechanism via ruthenium alkoxides and ruthenium aldoxides is proposed. In addition, a C-bound ruthenium enolate has been characterized.
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| 32. |
- Berg, Håkan, et al.
(författare)
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The effect of longitudinal substrate currents on the losses in silicon substrate coplanar-strip and coplanar waveguides
- 2000
-
Ingår i: International Journal of RF and Microwave Computer-Aided Engineering. - 1096-4290 .- 1099-047X. ; 10:5, s. 284-288
-
Tidskriftsartikel (refereegranskat)abstract
- The strip currents in silicon substrate CPS and CPW induce longitudinal currents in the substrate (along the strips of the lines) causing extra microwave losses. It is shown that these losses may be minimized without introducing extra masks and process steps if the slot widths in the lines are chosen properly
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| 33. |
- Berg, K. E., et al.
(författare)
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Covalently linked ruthenium(II)-manganese(II) complexes : Distance dependence of quenching and electron transfer
- 2001
-
Ingår i: European Journal of Inorganic Chemistry. - 1434-1948 .- 1099-1948. ; 2001:4, s. 1019-1029
-
Tidskriftsartikel (refereegranskat)abstract
- Continuing our development of artificial models for photosystem II in green plants, a series of compounds have been prepared in which a RU(bpy)(3)(2+) photosensitizer is covalently Linked to a manganese(II) electron donor. In addition to a trispicolylamine Ligand, two other manganese Ligands, dipicolylamine and aminodiacetic acid, have been introduced in order to study Ligands that are appropriate for the construction of manganese dimers with open coordination sites for the binding of water. Coordination equilibria of the manganese ions were monitored by EPR. The interactions between the ruthenium and manganese moieties were probed by flash photolysis, cyclic voltammetry and steady-state and time-resolved emission measurements. The quenching of the Ru-II excited state by Mn-II was found to be rapid in complexes with short Ru-Mn distances. Nevertheless, each Run species could be photo-oxidized by bimolecular quenching with methylviologen, and the subsequent electron transfer from Mn-II to Ru-III could be monitored.
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| 34. |
- Camenzind, Adrian, et al.
(författare)
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Nanostructure evolution : From aggregated to spherical SiO2 particles made in diffusion flames
- 2008
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :6, s. 911-918
-
Tidskriftsartikel (refereegranskat)abstract
- The formation of nanostructured silica particles by oxidation of hexamethyldisiloxane (HMDSO) in co-annular diffusion flames is investigated by in-situ small-angle X-ray scattering (SAXS). This enabled the nonintrusive monitoring of the mass fractal dimension, the aggregate size, and the number of primary particles per aggregate, along with the silica volume fraction, the primary particle diameter, the geometric standard deviation, and the number density along the flame axis. Parallel to this, thermophoretic sampling (TS) of the particles and analysis by transmission electron microscopy (TEM) allowed for direct comparison of particle morphology to that obtained from the above SAXS analysis, which were compared also to the ultra-small-angle X-ray scattering (US-AXS) data for product particles collected from the filter. The flame temperature was measured by in-situ Fourier transform infrared (FTIR) spectroscopy. By increasing the oxygen flow rate, the laminar diffusion flame changed to a turbulent, premixed-like flame. Non-aggregated, spherical particles were formed in the former, while aggregates were formed in the latter flame. The relatively long high-temperature particle residence times in the laminar diffusion flame facilitated sintering of the aggregates formed earlier into compact spherical particles at later stages of the flame. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).
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| 35. |
- Carrasco, Sergio, et al.
(författare)
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Hydrazine-Free Facile Synthesis of Palladium-Tetrakis(Triphenylphosphine)
- 2019
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :14, s. 1951-1955
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Tidskriftsartikel (refereegranskat)abstract
- We present an easy and very efficient procedure for the synthesis of Pd(PPh3)(4) using nontoxic reducing agents. The complex is obtained in a remarkable 83 % yield, and the method can be scaled up. A very detailed spectroscopic and spectrometric characterization is reported.
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| 36. |
- Das, Biswanath, et al.
(författare)
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A Heterobimetallic FeIIIMnII Complex of an Unsymmetrical Dinucleating Ligand : A Structural and Functional Model Complex for the Active Site of Purple Acid Phosphatase of Sweet Potato
- 2014
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; 2014:13, s. 2204-2212
-
Tidskriftsartikel (refereegranskat)abstract
- The heterodinuclear mixed-valence complex [FeMn(ICIMP)(OAc)(2)Cl] (1) {H2ICIMP = 2-(N-carboxylmethyl)-[N-(N-methylimidazolyl-2-methyl)aminomethyl]-[6-(N-isopropylmethyl)-[N-(N-methylimidazolyl-2-methyl)]aminomethyl-4-methylphenol], an unsymmetrical N4O2 donor ligand} has been synthesized and fully characterized by several spectroscopic techniques as well as by X-ray crystallography. The crystal structure of the complex reveals that both metal centers in 1 are six-coordinate with the chloride ion occupying the sixth coordination site of the Mn-II ion. The phenoxide moiety of the ICIMP ligand and both acetate ligands bridge the two metal ions of the complex. Mossbauer spectroscopy shows that the iron ion in 1 is high-spin Fe-III. Two quasi-reversible redox reactions for the complex, attributed to the (FeMnII)-Mn-III/(FeMnII)-Mn-II (at -0.67 V versus Fc/Fc(+)) and (FeMnII)-Mn-III/(FeMnIII)-Mn-III (at 0.84 V), were observed by means of cyclic voltammetry. Complex 1, with an Fe-III-Mn-II distance of 3.58 angstrom, may serve as a model for the mixed-valence oxidation state of purple acid phosphatase from sweet potato. The capability of the complex to effect organophosphate hydrolysis (phosphatase activity) has been investigated at different pH levels (5.5-11) by using bis(2,4-dinitrophenyl)phosphate (BDNPP) as the substrate. Density functional theory calculations indicate that the substrate coordinates to the Mn-II ion. In the transition state, a hydroxide ion that bridges the two metal ions becomes terminally coordinated to the Fe-III ion and acts as a nucleophile, attacking the phosphorus center of BDNPP with the concomitant dissociation of the leaving group.
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| 37. |
- Das, Biswanath, et al.
(författare)
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An Unsymmetric Ligand with a N5O2 Donor Set and Its Corresponding Dizinc Complex : A Structural and Functional Phosphoesterase Model
- 2018
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :36, s. 4004-4013
-
Tidskriftsartikel (refereegranskat)abstract
- To mimic the active sites of the hydrolytic enzyme zinc phosphotriesterase, a new dinucleating unsymmetric ligand, PICIMP (2-{[2-hydroxy-5-methyl-3-({[(1-methyl-1H-imidazol-2-yl)methyl](pyridin-2-ylmethyl)amino}methyl)benzyl][(1-methyl-1H-imidazol-2-yl)methyl]amino}acetic acid), has been synthesized and characterized. The hydrolytic efficacy of the complex solution (PICIMP/ZnCl2 = 1:2) has been investigated using bis-(2,4-dinitrophenyl)phosphate (BDNPP), a DNA analogue substrate. Speciation studies were undertaken by potentiometric titrations at varying pH for both the ligand and the corresponding dizinc complex to elucidate the formation of the active hydrolysis catalyst; these studies reveal that the dinuclear zinc(II) complexes, [Zn-2(PICIMP)](2+) and [Zn-2(PICIMP)(OH)](+) predominate in solution above pH 4. The obtained pK(a) of 7.44 for the deprotonation of water suggests formation of a bridging hydroxide between the two Zn-II ions. Kinetic investigations of BDNPP hydrolysis over the pH range 5.5-10.5 have been performed. The cumulative results indicate the hydroxo-bridged dinuclear Zn-II complex [Zn-2(PICIMP)(mu-OH)](+) as the effective catalyst. Density functional theory calculations were performed to investigate the detailed reaction mechanism. The calculations suggest that the bridging hydroxide becomes terminally coordinated to one of the zinc ions before performing the nucleophilic attack in the reaction.
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| 38. |
- Deleniv, Anatoli, et al.
(författare)
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Modeling gap discontinuity in coplanar waveguide using quazi-static spectral domain method
- 2000
-
Ingår i: International Journal of RF and Microwave Computer-Aided Engineering. - 1096-4290 .- 1099-047X. ; 10:3, s. 150-158
-
Tidskriftsartikel (refereegranskat)abstract
- An efficient computer technique based on the spectral domain method is presented to solve the problem of modeling coplanar gap discontinuity. Comparison with available published data is done to confirm the accuracy of the method.
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| 39. |
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| 40. |
- D'Imperio, Nicolas, et al.
(författare)
-
Triphenylphosphaalkenes in Chemical Equilibria
- 2019
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :11-12, s. 1562-1566
-
Tidskriftsartikel (refereegranskat)abstract
- Triphenylphosphaalkenes 1a-c were prepared in good to excellent yields in a modified phospha-Peterson reaction between PhP(Li)TMS and benzophenones with different para-substituents at the C-phenyl groups (a: R = H, b: R = O-octyl, c: R = F). Owing to the low kinetic stabilization that is provided by the P-phenyl group, compounds 1a-c engage in reversible dimerization and oligomerization reactions, some of which are not detectable by 31P NMR monitoring. The dimers and oligomers are in chemical equilibria with monomeric 1a-c, and can be converted quantitatively to phosphinites 4a-c by the irreversible addition of methanol across the P=C double bond.
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| 41. |
- Dong, Hengjin, et al.
(författare)
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The impact of expanded health system reform on governmental contributions and individual copayments in the new Chinese rural cooperative medical system
- 2016
-
Ingår i: International Journal of Health Planning and Management. - : Wiley. - 0749-6753 .- 1099-1751. ; 31:1, s. 36-48
-
Tidskriftsartikel (refereegranskat)abstract
- In 2002, the Chinese central government created a new rural cooperative medical system (NCMS), ensuring that both central and local governments partner with rural residents to reduce their copayments, thus making healthcare more affordable. Yet, significant gaps in health status and healthcare utilization persisted between urban and rural communities. Therefore, in 2009, healthcare reform was expanded, with (i) increased government financing and (ii) sharply reduced individual copayments for outpatient and inpatient care. Analyzing data from China's Ministry of Health, the Rural Cooperative Information Network, and Statistical Yearbooks, our findings suggest that healthcare reform has reached its preliminary objectives-government financing has grown significantly in most rural provinces, especially those in poorer western and central China, and copayments in most rural provinces have been reduced. Significant intraprovincial inequality of support remains. The central government contributes more money for poor provinces than for rich ones; however, NCMS schemes operate at the county level, which vary significantly in their level of economic development and per capital gross domestic products (GDP) within a province. Data reveal that the compensation ratios for both outpatient and inpatient care are not adjusted to compensate for a rural county's level of economic development or per capita GDP. Consequently, a greater financial burden for healthcare persists among persons in the poorest rural regions. A recommendation for next step in healthcare reform is to pool resources at prefectural/municipal level and also adjust central government contributions according to the GDP level at prefectural/municipal level.
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| 42. |
- Durieux, Guillaume, et al.
(författare)
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Rate and Mechanism of the Oxidative Addition of a Silylborane to Pt0 Complexes : Mechanism for the Pt-Catalyzed Silaboration of 1,3-Cyclohexadiene
- 2008
-
Ingår i: European Journal of Inorganic Chemistry. - Weinheim : Wiley-VCH. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :27, s. 4236-4241
-
Tidskriftsartikel (refereegranskat)abstract
- The chemical reduction of Pt(acac)(2) by DIBALH in the presence of phosphanes, which is used to generate active Pt-0 complexes in the Pt-catalyzed silaboration of cyclohexadiene by 2-(diinethylphenylsilyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1) leading to the 1,4-silaborated product, was mimicked by the electrochemical reduction of Pt(acac)(2) in the presence of 2 equiv. of PR3 (R = Ph, nBu). The electrochemical reduction generates free acac anions and neutral Pt-0-(PR3)(2) complexes. The kinetics of the oxidative addition of bromobenzene (used first as a model molecule) and silylborane 1 to the Pt-0 complexes was investigated and the rate constants determined. Pt-0(PnBu(3))(2) is much more reactive than Pt-0(PPh3)(2) towards 1. From the electrochemical study, it emerges that the acac anions released in the reduction of Pt(acac)(2) do not coordinate to the Pt-0(PR3)(2) complexes. Consequently, the rate of the oxidative addition of 1 to Pt-0(PR3)(2), generated either by the electrochemical reduction or by the chemical reduction by DIBALH, is not affected by the acac anions and a posteriori not by aluminum cations. The oxidative addition and the further step of the catalytic cycle [insertion of the diene into the Pt-B bond of the Si-Pt-B complex generated in the oxidative addition, with formation of the eta(3)-allyl)Pt-Si complex] were monitored by NMR spectroscopy. Pt-0 and Pt-II complexes involved in the catalytic cycle were characterized. The oxidative addition is faster when the ligand is PMe2Ph relative to that obtained with PPh3, in agreement with the electrochemical data. No reductive elimination within the ((eta(3)-allyl))Pt-Si complex is observed when the ligand is PMe2Ph, whereas reactions in the presence of PPh3 proceeded to give the final product. As a consequence, PPh3 is a better ligand than PMe2Ph for the catalytic reaction, as observed experimentally.
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| 43. |
- El Jamal, Ghada, et al.
(författare)
-
H2O2-Induced Oxidative Dissolution of UO2 in Saline Solutions
- 2021
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; 2021:40, s. 4175-4182
-
Tidskriftsartikel (refereegranskat)abstract
- H2O2 is one of the oxidants responsible for driving the process of radiation-induced dissolution of spent nuclear fuel in geological repositories for spent nuclear fuel. As the groundwater composition will vary depending on geographical location as well as on the age of the repository (in relation to glacial cycles, etc.), it is important to elucidate the impact of different groundwater constituents. While several studies have addressed the impact of HCO3− and halide ions on the radiation chemistry of water in general and radiation-induced oxidative dissolution of spent nuclear fuel in particular, very few studies have addressed the impact of halide ions on the mechanism of the reaction between H2O2 and UO2. In this work, the impact of Cl−, Br− and ClO4− on the mechanism and kinetics of H2O2-induced oxidative dissolution of UO2-powder in aqueous suspensions with and without added HCO3− has been studied experimentally. The experiments reveal both ionic strength effects and specific ion effects on the kinetics of the reactions involved. These are discussed in connection to the results.
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| 44. |
- Elmroth, Erik, 1964-, et al.
(författare)
-
Computation and presentation of graphs displaying closure hierarchies of Jordan and Kronecker structures
- 2001
-
Ingår i: Numerical Linear Algebra with Applications. - : John Wiley & Sons. - 1070-5325 .- 1099-1506. ; 8:6-7, s. 381-399
-
Tidskriftsartikel (refereegranskat)abstract
- StratiGraph, a Java-based tool for computation and presentation of closure hierarchies of Jordan and Kronecker structures is presented. The tool is based on recent theoretical results on stratifications of orbits and bundles of matrices and matrix pencils. A stratification reveals the complete hierarchy of nearby structures. information critical for explaining the qualitative behaviour of linear systems under perturbations. StratiGraph facilitates the application of these theories and visualizes the resulting hierarchy as a graph. Nodes in the graph represent orbits or bundles of matrices or matrix pencils. Edges represent covering relations in the closure hierarchy. Given a Jordan or Kronecker structure, a user can obtain the complete information of nearby structures simply by mouse clicks on nodes of interest. This contribution gives an overview of the StratiGraph tool, presents its main functionalities and other features, and illustrates its use by sample applications. Copyright (C) 2001 John Wiley & Sons, Ltd.
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| 45. |
- Forcato, M., et al.
(författare)
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Chiral, enantiopure aluminum(III) and titanium(IV) azatranes
- 2006
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :5, s. 1032-1040
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Tidskriftsartikel (refereegranskat)abstract
- Al-III and Ti-IV complexes of C-3-symmetric tetradentate trisamidoamme ligands with trigonal bipyramidal coordination geometry, containing chlorine or dialkylamido groups, or with a free coordination site in the apical position, have been synthesised by salt metathesis and amine elimination. Products with threefold symmetry were generally obtained for tetravalent titanium, whereas for the aluminium complexes either asymmetric structures with two of the three podand arms taking part in coordination to the metal or symmetric arrangements possessing the full threefold symmetry were formed depending on the steric properties of the ligands.
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| 46. |
- Gao, Weiming, et al.
(författare)
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Synthesis of a [3Fe2S] Cluster with Low Redox Potential from [2Fe2S] Hydrogenase Models : Electrochemical and Photochemical Generation of Hydrogen
- 2011
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :7, s. 1100-1105
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Tidskriftsartikel (refereegranskat)abstract
- In the attempted replacement of carbon monoxide by the bis(phosphane) dppv in a dinuclear [2Fe2S] complex, a trinuclear [3Fe2S] complex with two bis(phosphane) ligands was unexpectedly obtained. On protonation, this gave a bridged hydride complex with an unusually low potential for the reduction of protons to molecular hydrogen. The redox potential also appears sufficiently positive for direct electron transfer from an excited [Ru(bpy)(3)](2+) sensitizer.
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| 47. |
- Goksör, Emma, 1974, et al.
(författare)
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High risk of adult asthma following severe wheezing in early life.
- 2015
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Ingår i: Pediatric pulmonology. - : Wiley. - 1099-0496 .- 8755-6863. ; 50:8, s. 789-797
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Severe wheezing in early life is associated with an increased risk of asthma during childhood and adolescence. The aim of the present follow-up was to investigate the asthma prevalence and risk factors for asthma in adulthood. Methods: We have prospectively studied asthma development in 101 children hospitalized due to severe wheezing before the age of 24 months. The cohort was re-investigated at a mean age of 27 years and tested for bronchial hyper-responsiveness and allergic sensitization. The response rate in adulthood was 81% (82/101). The results were compared with a population-based, age-matched control group (n=1,210) recruited from the West Sweden Asthma Study. Results: Current doctor-diagnosed asthma was found in 37% (30/82) compared with 7% (82/1,210) in the control group. The risk of adult asthma in the cohort compared with the control group was increased 10-fold (adjusted OR 10.0, 95% CI 5.3-18.7), independently of allergic rhinitis, gender, smoking and heredity. Within the cohort, current allergy (aOR 9.6, 95% CI 3.0-31.2) and female gender (aOR 3.2, 95% CI 1.1-9.3) independently increased the risk of adult asthma. Females with current allergy had the highest risk of adult asthma (OR 29.4, 95% CI 5.0-173.3), compared with males without allergy. When separately adjusting for factors present at admission in early life within the cohort, a family history of asthma was a significant risk factor for asthma in adulthood (aOR 4.0, 95% CI 1.3-12.5). Conclusion: Subjects with severe early wheezing have a 10-fold increase in the risk of adult asthma compared to an age-matched control group, adjusted for allergic rhinitis, gender, smoking and heredity. Pediatr Pulmonol. © 2014 Wiley Periodicals, Inc.
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| 48. |
- Gorlov, Mikhail, et al.
(författare)
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Mononuclear eta(6)-Arene Complexes of Lanthanides : One-Step Syntheses, Crystal Structures, and Arene Exchange
- 2008
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :33, s. 5191-5195
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Tidskriftsartikel (refereegranskat)abstract
- Gallium(III) halides react with cerium(III), ytterbium(III), or dysprosium(III) halides in the presence of alkylated benzenes yielding mononuclear complexes of the general formula [Ln(eta(6)-arene)(GaX4)(3)]. The X-ray structures of [Ce(C6H5Me)- (GaCl4)(3)] (1), [Ce(p-C6H4Me2)(GaCl4)(3)]center dot 0.5(p-C6H4Me2) (2), [Yb(C6H5Me)(GaCl4)(3)] (3), [Yb(p-C6H4Me2)(GaCl4)(3)]center dot 0.5(p- C6H4Me2) (4), and [Dy(C6H5Me)(GaBr4)(3)] (5) were determined. Arene ligands in the cerium-toluene compound 1 can be substituted by polycyclic aromatic hydrocarbons (PAHs); the compounds [Ce(naphthalene) (GaCl4)(3)] (6) and [Ce(pyrene)(GaCl4)(3)]center dot 0.5(pyrene) (7) have been isolated and structurally characterized.
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| 49. |
- Gowda, Vasantha, et al.
(författare)
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Structure Elucidation of an Yttrium Diethyldithiocarbamato-Phenanthroline Complex by X-ray Crystallography, Solid-State NMR, and ab-initio Quantum Chemical Calculations
- 2016
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; 20, s. 3278-3291
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Tidskriftsartikel (refereegranskat)abstract
- We present a structural analysis method for molecular and electronic structure of yttrium diethyldithiocarbamato-phenanthroline complex {[Y(S2CNR2)3PHEN] with R = C2H5 and PHEN = 1,10-phenanthroline} combining solid-state NMR spectroscopy, XRD, and first principles DFT calculations. Replacing the Nd3+ ion with Y3+ in the reported crystal structure of [Nd(S2CNR2)3PHEN] complex generated an approximate 3D structure of the title complex. The structure was then subjected to first principles quantum chemical geometry optimisation using periodic DFT method. The quality of the method is discussed by comparing predicted and experimental powder XRD patterns. Full assignment of 13C and 15N solid-state CP-MAS NMR spectra as well as analyses of the principal values of the chemical shift tensors were carried out using periodic scalar relativistic DFT modelling. Spin-orbit relativistic effects, estimated by SO-ZORA formalism for one molecular unit, were evaluated. Finally, the X-ray structure of the title complex was determined, which proved that the former procedure is appropriate. The most important orbital interactions were investigated by Natural Bond Orbital analysis. The isotropic shielding values for S2CN-carbons were analysed by Natural Localised Molecular Orbital analysis. The present approach can be further extended to study other rare earth metal complexes, particularly those having similar but not yet solved crystal structures
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| 50. |
- Green, Joshua P., et al.
(författare)
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Effect of Arsenic Coordination State on the Structure, Aromaticity, and Optical Properties of Dithieno[3,2-b:2 ',3 '-d]arsoles
- 2019
-
Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-1948 .- 1099-0682. ; :11-12, s. 1539-1543
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Tidskriftsartikel (refereegranskat)abstract
- A silylated derivative of 4-phenyl-dithieno[3,2-b:2 ',3 '-d]arsole (DTAs) was synthesized, and the effect of coordinating of DTAs compounds to Pd on their structural and optical properties was investigated. Coordination of the As to Pd was found to increase the structural aromaticity of the ring system as measured by the harmonic oscillator measure of heterocyclic electron delocalization (HOMHED), and the pyramidalization of the As atoms was also found to show a good correlation with the HOMHED values. However, coordination had a more subtle impact on the optical properties than seen for phosphorus-containing analogues as the metal-ligand interactions were weaker.
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