| 1. |
- Abdellaoui, G., et al.
(författare)
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First observations of speed of light tracks by a fluorescence detector looking down on the atmosphere
- 2018
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Ingår i: Journal of Instrumentation. - : IOP PUBLISHING LTD. - 1748-0221. ; 13
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Tidskriftsartikel (refereegranskat)abstract
- EUSO-Balloon is a pathfinder mission for the Extreme Universe Space Observatory onboard the Japanese Experiment Module (JEM-EUSO). It was launched on the moonless night of the 25(th) of August 2014 from Timmins, Canada. The flight ended successfully after maintaining the target altitude of 38 km for five hours. One part of the mission was a 2.5 hour underflight using a helicopter equipped with three UV light sources (LED, xenon flasher and laser) to perform an inflight calibration and examine the detectors capability to measure tracks moving at the speed of light. We describe the helicopter laser system and details of the underflight as well as how the laser tracks were recorded and found in the data. These are the first recorded laser tracks measured from a fluorescence detector looking down on the atmosphere. Finally, we present a first reconstruction of the direction of the laser tracks relative to the detector.
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| 2. |
- Hoshino, Ayuko, et al.
(författare)
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Extracellular Vesicle and Particle Biomarkers Define Multiple Human Cancers
- 2020
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Ingår i: Cell. - : CELL PRESS. - 0092-8674 .- 1097-4172. ; 182:4, s. 1044-
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Tidskriftsartikel (refereegranskat)abstract
- There is an unmet clinical need for improved tissue and liquid biopsy tools for cancer detection. We investigated the proteomic profile of extracellular vesicles and particles (EVPs) in 426 human samples from tissue explants (TEs), plasma, and other bodily fluids. Among traditional exosome markers, CD9, HSPA8, ALIX, and HSP90AB1 represent pan-EVP markers, while ACTB, MSN, and RAP1B are novel pan-EVP markers. To confirm that EVPs are ideal diagnostic tools, we analyzed proteomes of TE- (n =151) and plasma-derived (n =120) EVPs. Comparison of TE EVPs identified proteins (e.g., VCAN, TNC, and THBS2) that distinguish tumors from normal tissues with 90% sensitivity/94% specificity. Machine-learning classification of plasma-derived EVP cargo, including immunoglobulins, revealed 95% sensitivity/90% specificity in detecting cancer Finally, we defined a panel of tumor-type-specific EVP proteins in TEs and plasma, which can classify tumors of unknown primary origin. Thus, EVP proteins can serve as reliable biomarkers for cancer detection and determining cancer type.
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| 3. |
- Yang, B., et al.
(författare)
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Exploring high-energy doubly excited states of NH by dissociative recombination of NH
- 2014
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Ingår i: Journal of Physics B. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 47:3, s. 035201-
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Tidskriftsartikel (refereegranskat)abstract
- We have investigated electron capture by NH+ resulting in dissociative recombination (DR). The impact energies studied of similar to 4-12 eV extend over the range below the two lowest predicted NH+ dissociative states in the Franck-Condon (FC) region of the ion. Our focus has been on the final state populations of the resulting N and H atoms. The neutral DR fragments are detected downstream of a merged electron and ion beam interaction zone in the TSR storage ring, which is located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Transverse fragment distances were measured on a recently developed high count-rate imaging detector. The distance distributions enabled a detailed tracking of the final state populations as a function of the electron collision energy. These can be correlated with doubly excited neutral states in the FC region of the ion. At low electron energy of similar to 5 eV, the atomic product final levels are nitrogen Rydberg states together with ground-state hydrogen. In a small electron energy interval near 7 eV, a significant part of the final state population forms hydrogen Rydberg atoms with nitrogen atoms in the first excited (D-2) term, showing the effect of Rydberg doubly excited states below the predicted 2(2)Pi ionic potential. The distance distributions above similar to 10 eV are compatible with nitrogen Rydberg states correlating to the doubly excited Rydberg state manifold below the ionic 2(4) Sigma(-) level.
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| 4. |
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| 5. |
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| 6. |
- Novotny, O., et al.
(författare)
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DISSOCIATIVE RECOMBINATION MEASUREMENTS OF HCl+ USING AN ION STORAGE RING
- 2013
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Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 777:1, s. 54-
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Tidskriftsartikel (refereegranskat)abstract
- We have measured dissociative recombination (DR) of HCl+ with electrons using a merged beams configuration at the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present the measured absolute merged beams recombination rate coefficient for collision energies from 0 to 4.5 eV. We have also developed a new method for deriving the cross section from the measurements. Our approach does not suffer from approximations made by previously used methods. The cross section was transformed to a plasma rate coefficient for the electron temperature range from T = 10 to 5000 K. We show that the previously used HCl+ DR data underestimate the plasma rate coefficient by a factor of 1.5 at T = 10 K and overestimate it by a factor of three at T = 300 K. We also find that the new data may partly explain existing discrepancies between observed abundances of chlorine-bearing molecules and their astrochemical models.
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| 7. |
- Novotný, O., et al.
(författare)
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DISSOCIATIVE RECOMBINATION MEASUREMENTS OF NH+ USING AN ION STORAGE RING
- 2014
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Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 792:2
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Tidskriftsartikel (refereegranskat)abstract
- We have investigated dissociative recombination (DR) of NH+ with electrons using a merged beams configuration at the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present our measured absolute merged-beams recombination rate coefficient for collision energies from 0 to 12 eV. From these data, we have extracted a cross section, which we have transformed to a plasma rate coefficient for the collisional plasma temperature range from T-p1 = 10 to 18,000 K. We show that the NH+ DR rate coefficient data in current astrochemical models are underestimated by up to a factor of approximately nine. Our new data will result in predicted NH+ abundances lower than those calculated by present models. This is in agreement with the sensitivity limits of all observations attempting to detect NH+ in interstellar clouds.
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| 8. |
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| 9. |
- Bjorklund, Robert, et al.
(författare)
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Continuous monitoring of yoghurt fermentation using a noble metal electrode array
- 2009
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Ingår i: International Journal of Food Science and Technology. - : Wiley. - 0950-5423 .- 1365-2621. ; 44:3, s. 635-640
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Tidskriftsartikel (refereegranskat)abstract
- An electrochemical probe containing gold, platinum and rhodium working electrodes was used to monitor yoghurt production in a pilot facility. Three commercial starting cultures at 40, 42 and 44 C transformed milk having 1.5% fat content to mild yoghurt products. The electrochemical changes in the broth during fermentation were recorded as current responses from pulse voltammetry over the electrodes. Principal component analysis of the responses generated two-dimensional score plots describing the qualitative fermentation progressions. Two distinct fermentation pathways were observed leading to similar final products. The pH was recorded during the fermentations and the data was used as reference values for creating a partial least squares model for prediction of pH as an example of a quantitative application for the sensor. The relative mean squared error for validation of the model using four probes interchangeably was about 2%. The probe was constructed of materials approved for use in the food industry and did not require a standard glass reference electrode.
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| 10. |
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| 11. |
- Carlsson, Andreas, et al.
(författare)
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An electronic tongue as a tool for wet-end monitoring
- 2001
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Ingår i: Nordic Pulp & Paper Research Journal. - 0283-2631 .- 2000-0669. ; 16:4, s. 319-326
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Tidskriftsartikel (refereegranskat)abstract
- An electronic tongue based on voltammetry and multivariate signal analysis has been evaluated as a tool for characterisation of the chemistry of the wet-end of a paper machine. Measurements were performed on head-box furnish samples from a tissue machine. PLS models, based on electronic tongue data, were made of five reference parameters - pH, conductivity, cationic demand, zeta potential and turbidity. The correlation coefficients for predicted values were for all parameters higher than 0.88. Highly correlated reference parameters might be part of the explanation for the high correlation factors. Still the results, being based on data without e.g. drift compensation, indicate that the electronic tongue has very promising features as a tool for wet-end control. Flexibility, fast response and wide sensitivity spectra make the electronic tongue suitable for a variety of applications.
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| 12. |
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| 13. |
- Concepcion Gil-Rodriguez, Maria, et al.
(författare)
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De Novo Heterozygous Mutations in SMC3 Cause a Range of Cornelia de Lange Syndrome-Overlapping Phenotypes
- 2015
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Ingår i: Human Mutation. - : Wiley: 12 months. - 1059-7794 .- 1098-1004. ; 36:4, s. 454-462
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Tidskriftsartikel (refereegranskat)abstract
- Cornelia de Lange syndrome (CdLS) is characterized by facial dysmorphism, growth failure, intellectual disability, limb malformations, and multiple organ involvement. Mutations in five genes, encoding subunits of the cohesin complex (SMC1A, SMC3, RAD21) and its regulators (NIPBL, HDAC8), account for at least 70% of patients with CdLS or CdLS-like phenotypes. To date, only the clinical features from a single CdLS patient with SMC3 mutation has been published. Here, we report the efforts of an international research and clinical collaboration to provide clinical comparison of 16 patients with CdLS-like features caused by mutations in SMC3. Modeling of the mutation effects on protein structure suggests a dominant-negative effect on the multimeric cohesin complex. When compared with typical CdLS, many SMC3-associated phenotypes are also characterized by postnatal microcephaly but with a less distinctive craniofacial appearance, a milder prenatal growth retardation that worsens in childhood, few congenital heart defects, and an absence of limb deficiencies. While most mutations are unique, two unrelated affected individuals shared the same mutation but presented with different phenotypes. This work confirms that de novo SMC3 mutations account for approximate to 1%-2% of CdLS-like phenotypes.
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| 14. |
- Cvijovic, Marija, 1977, et al.
(författare)
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Strategies for structuring interdisciplinary education in systems biology: An European perspective
- 2016
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Ingår i: npj Systems Biology and Applications. - : Springer Science and Business Media LLC. - 2056-7189. ; 2
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Tidskriftsartikel (refereegranskat)abstract
- Systems Biology is an approach to biology and medicine that has the potential to lead to a better understanding of how biological properties emerge from the interaction of genes, proteins, molecules, cells and organisms. The approach aims at elucidating how these interactions govern biological function by employing experimental data, mathematical models and computational simulations. As Systems Biology is inherently multidisciplinary, education within this field meets numerous hurdles including departmental barriers, availability of all required expertise locally, appropriate teaching material and example curricula. As university education at the Bachelor’s level is traditionally built upon disciplinary degrees, we believe that the most effective way to implement education in Systems Biology would be at the Master’s level, as it offers a more flexible framework. Our team of experts and active performers of Systems Biology education suggest here (i) a definition of the skills that students should acquire within a Master’s programme in Systems Biology, (ii) a possible basic educational curriculum with flexibility to adjust to different application areas and local research strengths, (iii) a description of possible career paths for students who undergo such an education, (iv) conditions that should improve the recruitment of students to such programmes and (v) mechanisms for collaboration and excellence spreading among education professionals. With the growing interest of industry in applying Systems Biology approaches in their fields, a concerted action between academia and industry is needed to build this expertise. Here we present a reflection of the European situation and expertise, where most of the challenges we discuss are universal, anticipating that our suggestions will be useful internationally. We believe that one of the overriding goals of any Systems Biology education should be a student’s ability to phrase and communicate research questions in such a manner that they can be solved by the integration of experiments and modelling, as well as to communicate and collaborate productively across different experimental and theoretical disciplines in research and development.
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| 15. |
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| 16. |
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| 17. |
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| 18. |
- Jonzon, Robert, et al.
(författare)
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Violence against women in intimate relationships: Explanations and suggestions for interventions as perceived by healthcare workers, local leaders, and trusted community members in a northern district of Vietnam
- 2007
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Ingår i: SCANDINAVIAN JOURNAL OF PUBLIC HEALTH. - : SAGE Publications. - 1403-4948 .- 1651-1905. ; 35:6, s. 640-647
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Tidskriftsartikel (refereegranskat)abstract
- Aim: This study explored professionals' and trusted community inhabitants' explanations of the violence between intimate partners and their suggestions for preventive activities. It was performed in a rural district in northern Vietnam. Methods: A total of 20 men and 20 women were strategically selected for focus-group discussions and the analyses followed the procedure for qualitative thematic content analysis. Results: It was pointed out that violence against women was not discussed openly in the community and women subjected to violence kept silent and avoided seeking help in order not to reveal what was happening in the family. The informants perceived the violence as an interplay between individual and family-related factors and sociocultural norms and practices where Confucian ideology exerted a strong influence. When it came to prevention, there was a strong belief in educating the people and in enforcing policy and law. Conclusions: As described by the informants, traditional attitudes to gender roles and women's power disadvantage are found to be behind most of the explanations for intimate partner violence. Collaboration between sectors at local level, between the health sector and other bodies, and with community leaders as spokesmen would help to improve openness and reduce society's tolerance of violence against women. The mass media also have an important role to play.
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| 19. |
- Kjaergaard, M., et al.
(författare)
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Demonstration of Density Matrix Exponentiation Using a Superconducting Quantum Processor
- 2022
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Ingår i: Physical Review X. - 2160-3308. ; 12:1
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Tidskriftsartikel (refereegranskat)abstract
- Quantum computers hold the potential to outperform classical supercomputers at certain tasks. To implement algorithms on a quantum computer, programmers use conventional computers and hardware to create a set of classical control signals that implement a desired quantum algorithm. However, feeding the quantum information forward requires an inefficient conversion: extraction of quantum information, conversion to classical control signals, and reinjection of those signals into the system to implement quantum operations. Here, we demonstrate a more natively quantum strategy to programming quantum computers. Our approach uses the density matrix exponentiation (DME) protocol, a general technique for using a quantum state to enact a quantum operation. It can be thought of as a subroutine with which programmers can turn multiple copies of a quantum state into instructions for next steps in a quantum algorithm.We implement DME using two qubits in a superconducting quantum processor. Our implementation relies on a high-fidelity two-qubit gate and a novel technique called quantum measurement emulation to approximately reset a known quantum state. These developments enable us to demonstrate the DME protocol for the first time on a small-scale quantum processor and benchmark its performance.While DME was originally proposed in the context of a specific quantum machine-learning algorithm, it may also represent a fundamentally different approach to quantum programming. It allows the possibility of encoding quantum algorithms directly into quantum states and executing those algorithms on other quantum states, enabling a new class of efficient quantum algorithms.
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| 20. |
- Krantz, Christina, et al.
(författare)
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Cross-sectional study on exhaled nitric oxide in relation to upper airway inflammatory disorders with regard to asthma and perennial sensitization
- 2022
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Ingår i: Clinical and Experimental Allergy. - : Wiley. - 0954-7894 .- 1365-2222. ; 52:2, s. 297-311
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Tidskriftsartikel (refereegranskat)abstract
- Background Fractional exhaled nitric oxide (FeNO) is a well-known marker of type-2 inflammation. FeNO is elevated in asthma and allergic rhinitis, with IgE sensitization as a major determinant. Objective We aimed to see whether there was an independent association between upper airway inflammatory disorders (UAID) and FeNO, after adjustment for asthma and sensitization, in a multi-centre population-based study. Methods A total of 741 subjects with current asthma and 4155 non-asthmatic subjects participating in the second follow-up of the European Community Respiratory Health Survey (ECRHS III) underwent FeNO measurements. Sensitization status was based on measurement of IgE against airborne allergens; information on asthma, UAID and medication was collected through interview-led questionnaires. Independent associations between UAID and FeNO were assessed in adjusted multivariate regression models and test for interaction with perennial sensitization and asthma on the relation between UAID and FeNO were made. Results UAID were associated with higher FeNO after adjusting for perennial sensitization, asthma and other confounders: with 4.4 (0.9-7.9) % higher FeNO in relation to current rhinitis and 4.8 (0.7-9.2) % higher FeNO in relation to rhinoconjunctivitis. A significant interaction with perennial sensitization was found in the relationship between current rhinitis and FeNO (p = .03) and between rhinoconjunctivitis and FeNO (p = .03). After stratification by asthma and perennial sensitization, the association between current rhinitis and FeNO remained in non-asthmatic subjects with perennial sensitization, with 12.1 (0.2-25.5) % higher FeNO in subjects with current rhinitis than in those without. Conclusions & Clinical Relevance Current rhinitis and rhinoconjunctivitis was associated with higher FeNO, with an interaction with perennial sensitization. This further highlights the concept of united airway disease, with correlations between symptoms and inflammation in the upper and lower airways and that sensitization needs to be accounted for in the relation between FeNO and rhinitis.
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| 21. |
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| 22. |
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| 23. |
- Krantz-Rülcker, C., et al.
(författare)
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Adsorption of IIB-metals by three common soil fungi-comparison and assessment of importance for metal distribution in natural soil systems
- 1996
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Ingår i: Soil Biology and Biochemistry. - : Elsevier. - 0038-0717 .- 1879-3428. ; 28:7, s. 967-975
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Tidskriftsartikel (refereegranskat)abstract
- Interactions of IIb-elements, Zn, Cd and Hg, with three common soil fungi, Trichoderma harzianum, Penicillium spinulosum and Mortierella isabellina, have been studied. The accumulation of the metals by the fungi was studied as a function of pH at constant ionic strength and at concentration levels of the metals representative of natural systems. Two stages of fungal activity were considered in the experiments. The fungi generally exhibited high affinity for metal ions indicated by distribution coefficients (log K-d, in 1 kg(-1)) of about 3.5 +/- 1, 2.5 +/- 1 and 4 +/- 1 for Zn, Cd and Hg, respectively. The pH-dependence of the accumulation as well as the isotherms at constant pH were similar between the fungi, and the maximum capacities were at least 50 mmoles kg(-1) mycelium (dw). Metal accumulation by starved mycelia was almost independent of pH, while non-starved mycelia in two cases accumulated more metals at low pH. Calculations of the distribution of metals in a model soil system of inorganic and organic constituents as well as fungal biomass indicated that the amounts of metal associated to the fungi are negligible at neutral pH. However, due to the ability of these fungi to accumulate metals independently of pH, the fraction of metals associated to fungal biomass at low pH may be significant, and, in some cases, predominant. This illustrates that the effects of fungi on metal distribution in soil should not be neglected, e.g. during a progressing acidification.
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| 24. |
- Krantz-Rülcker, C., et al.
(författare)
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Interactions between a soil fungus, Trichoderma harzianum, and IIb metals—adsorption to mycelium and production of complexing metabolites
- 1993
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Ingår i: Biometals. - : Springer. - 0966-0844 .- 1572-8773. ; 6:4, s. 223-230
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Tidskriftsartikel (refereegranskat)abstract
- Fungi are capable of accumulating metals and, in soil, such accumulation may influence metal speciation and transport. The interactions between a common soil fungus, Trichoderma harzianum, and IIb elements were studied in the present investigation. The accumulation of the metals zinc, cadmium and mercury by starved and non-starved mycelium at different pH was determined by a batch technique using radioactive tracers; uptake of the metals was found to be large, with respective distribution coefficients of about 10(3.5), 10(2.5) and 10(4.0) for zinc, cadmium and mercury, respectively. Metal accumulation by a starved system was largely independent of pH in the range 3-9, where in a non-starved system an increased accumulation of zinc (at 10(-8) m) was observed at low pH (3-5). Potentiometric titrations performed on the two systems revealed significant differences in acid capacities, i.e. values close to zero for the starved system and 500-800 meq kg-1 for the non-starved system. The maximum metal uptake was at least 50 mmol kg-1 at pH 6.5 (calculated from adsorption isotherms). The present findings suggests that in the non-starved system a metabolite is produced and then released when the pH is within a certain range.
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| 25. |
- Krantz-Rülcker, C., et al.
(författare)
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Metal loading and enzymatic degradation of fungal cell walls and chitin
- 1995
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Ingår i: Biometals. - : Rapid Science Publishers. - 0966-0844 .- 1572-8773. ; 8:1, s. 12-18
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Tidskriftsartikel (refereegranskat)abstract
- The capacity of chitin (from crab shells) and of fungal cell walls from Trichoderma harzianum to accumulate zinc, cadmium and mercury was studied as well as the effects of adsorbed metals on the enzymatic hydrolysis by Novozym 234 of the two substrates. The total adsorbing capacity with respect to these metals was estimated to be at least 10 mmol kg(-1) chitin (dry weight) and 50 mmol kg(-1) fungal cell walls (dry weight), respectively, at pH 6.1. Enzymatic digestion of fungal cell walls preloaded with mercury and cadmium was significantly reduced, while zinc did not cause any significant inhibition. The effect of metal complexation by chitin on the enzymatic digestion was not as pronounced as for fungal cell walls. This could reflect the fact that chitin sorbed a lower total amount of metals. The inhibitory effect of metals on the enzymatic hydrolysis was caused by the association of the metals with the two substrates and not by the presence of free metals in solution.
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| 26. |
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| 27. |
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| 28. |
- Majdi, Soodabeh, 1980, et al.
(författare)
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Electrochemical Measurements of Optogenetically Stimulated Quantal Amine Release from Single Nerve Cell Varicosities in Drosophila Larvae
- 2015
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 54:46, s. 13609-13612
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Tidskriftsartikel (refereegranskat)abstract
- The nerve terminals found in the body wall of Drosophila melanogaster larvae are readily accessible to experimental manipulation. We used the light-activated ion channel, channelrhodopsin-2, which is expressed by genetic manipulation in TypeII varicosities to study octopamine release in Drosophila. We report the development of a method to measure neurotransmitter release from exocytosis events at individual varicosities in the Drosophila larval system by amperometry. A microelectrode was placed in a region of the muscle containing a varicosity and held at a potential sufficient to oxidize octopamine and the terminal stimulated by blue light. Optical stimulation of TypeII boutons evokes exocytosis of octopamine, which is detected through oxidization at the electrode surface. We observe 22700 +/- 4200 molecules of octopamine released per vesicle. This system provides a genetically accessible platform to study the regulation of amine release at an intact synapse.
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| 29. |
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| 30. |
- Miller, David T., et al.
(författare)
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Consensus Statement : Chromosomal Microarray Is a First-Tier Clinical Diagnostic Test for Individuals with Developmental Disabilities or Congenital Anomalies
- 2010
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Ingår i: American Journal of Human Genetics. - : Elsevier BV. - 0002-9297 .- 1537-6605. ; 86:5, s. 749-764
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Tidskriftsartikel (refereegranskat)abstract
- Chromosomal microarray (CMA) is increasingly utilized for genetic testing of individuals with unexplained developmental delay/intellectual disability (DD/ID), autism spectrum disorders (ASD), or multiple congenital anomalies (MCA). Performing CMA and G-banded karyotyping on every patient substantially increases the total cost of genetic testing. The International Standard Cytogenomic Array (ISCA) Consortium held two international workshops and conducted a literature review of 33 studies, including 21,698 patients tested by CMA. We provide an evidence-based summary of clinical cytogenetic testing comparing CMA to G-banded karyotyping with respect to technical advantages and limitations, diagnostic yield for various types of chromosomal aberrations, and issues that affect test interpretation. CMA offers a much higher diagnostic yield (15%-20%) for genetic testing of individuals with unexplained DD/ID, ASD, or MCA than a G-banded karyotype (similar to 3%, excluding Down syndrome and other recognizable chromosomal syndromes), primarily because of its higher sensitivity for submicroscopic deletions and duplications. Truly balanced rearrangements and low-level mosaicism are generally not detectable by arrays, but these are relatively infrequent causes of abnormal phenotypes in this population (<1%). Available evidence strongly supports the use of CMA in place of G-banded karyotyping as the first-tier cytogenetic diagnostic test for patients with DD/ID, ASD, or MCA. G-banded karyotype analysis should be reserved for patients with obvious chromosomal syndromes (e.g., Down syndrome), a family history of chromosomal rearrangement, or a history of multiple miscarriages.
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| 31. |
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| 32. |
- Nordgren, Camilla, et al.
(författare)
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Efterfrågas rätt kunskap och kompetens
- 2021
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Ingår i: Socionomen. - : Akademikerförbundet SSR. - 0283-1929. ; :1
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 33. |
- Novotny, O., et al.
(författare)
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Dissociative Recombination Measurements of Chloronium Ions (D2Cl+) Using an Ion Storage Ring
- 2018
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 862:2
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Tidskriftsartikel (refereegranskat)abstract
- We report our plasma rate coefficient and branching ratio measurements for dissociative recombination (DR) of D2Cl+ with electrons. The studies were performed in a merged-beams configuration using the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Starting with our absolute merged-beams recombination rate coefficient at a collision energy of approximate to 0 eV, we have extracted the cross section and produced a plasma rate coefficient for a translational temperature of approximate to 8 K. Furthermore, extrapolating our cross-section results using the typical low-energy DR behavior, we have generated a plasma rate coefficient for translational temperatures from 5 to 500 K. We find good agreement between our extrapolated results and previous experimental DR studies on D2Cl+. Additionally, we have investigated the three fragmentation channels for DR of D2Cl+. Here we report on the dissociation geometry of the three-body fragmentation channel, the kinetic energy released for each of the three outgoing channels, the molecular internal excitation for the two outgoing channels that produce molecular fragments, and the fragmentation branching ratios for all three channels. Our results, in combination with those of other groups, indicate that any remaining uncertainties in the DR rate coefficient for H2Cl+ appear unlikely to explain the observed discrepancies between the inferred abundances of HCl and H2Cl+ in molecular clouds and predictions from astrochemical models.
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| 34. |
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| 35. |
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| 36. |
- Ringsberg, Karin C., 1945, et al.
(författare)
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Coping with patients with medically unexplained symptoms: work-related strategies of physicians in primary health care.
- 2006
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Ingår i: Journal of health psychology. - : SAGE Publications. - 1359-1053 .- 1461-7277. ; 11:1, s. 107-16
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Tidskriftsartikel (refereegranskat)abstract
- General practitioners (GPs) often meet patients with medically unexplained symptoms (MUS). From a patient perspective, MUS is a well-acknowledged problem within the primary health care services today, but less is known about the GPs' perceptions. This study aims to elucidate GPs' perceptions of patients with MUS, focusing on stressing situations, emotional reactions and coping strategies. Twenty-seven physicians participated in focus-group discussions. In the analysis, where a phenomenographic approach was used, six situations were identified as being especially stressful in the encounter with these patients. The GPs described how they used both problem-focused and emotion-focused strategies, but with emotion-focused strategies slightly dominating, indicating that the GPs had difficulties in managing their own stress when working with patients with MUS.
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| 37. |
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| 38. |
- Semasaka, Jean Paul S., et al.
(författare)
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Self-reported pregnancy-related health problems and self-rated health status in Rwandan women postpartum: A population-based cross-sectional study
- 2016
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Ingår i: BMC Pregnancy and Childbirth. - : Springer Science and Business Media LLC. - 1471-2393. ; 16:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Self-rated health status (SRH) can be used as a predictor of morbidity and mortality. Postpartum self-rated health has been used to estimate maternal morbidity and postpartum problems. Reproductive history factors are associated with poor self-rated health postpartum. This study investigated prevalence of self-reported health problems during first, second, and third trimesters of pregnancy, delivery, and postpartum. In addition, this study investigated SRH in Rwandan women up to 13 months from partus. Methods: This population-based, cross-sectional study collected data in 2014 using structured interviews (N = 921). Univariable analysis was used to identify variables that were associated with poor self-rated health status (poor-SRH). Logistic regression analyses were performed to identify factors associated with poor-SRH at one day, one week, and one month postpartum and at the time of the interview. Results: Mean time between latest delivery and the time of interview was 7.1 months. Prevalence of anaemia, hypertension, diabetes mellitus during pregnancy, and severe bleeding during pregnancy and labour were 15.0, 4.9, 2.4, and 3.7 %, respectively. The prevalence of poor-SRH was 32.2 % at one day postpartum, 7.8 % at one month, and 11.7 % at time of the interview. Hypertension during pregnancy and significant postpartum haemorrhage were associated with poor-SRH at one day and one week postpartum. Severe bleeding during pregnancy and labour were associated with poor-SRH at one week and one month postpartum. Infection and anaemia during pregnancy were associated with poor-SRH at one month postpartum and at the time of interview. The Kaplan-Meier curves illustrate restitution of health for most women during the study period. Conclusions: This population-based study reports a high prevalence of poor SRH status among Rwandan women in the early postpartum period. Identified factors associated with poor-SRH were severe bleeding, hypertension, infection, and anaemia during pregnancy and postpartum haemorrhage. These factors may be prevented or reduced by providing more frequent and specific attention during pregnancy and by providing timely measures that address complications during delivery, including adequate postpartum care. © 2016 The Author(s).
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| 39. |
- Semasaka Sengoma, Jean Paul, et al.
(författare)
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"Not taken seriously"-A qualitative interview study of postpartum Rwandan women who have experienced pregnancy-related complications
- 2019
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Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 14:2
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Tidskriftsartikel (refereegranskat)abstract
- Background There is limited knowledge on the women's experiences of pregnancy-related complications in Rwanda. This study aimed to investigate women's experiences and perceptions of specific complications during pregnancy and delivery and the consequences of these complications on postpartum health and family situation. Data were collected through individual in-depth interviews (N = 15). Participants who experienced complications such as postpartum haemorrhage, caesarean section due to prolonged labour/dystocia, pre-eclampsia, or fistula and who were 13-24 months postpartum were invited to participate in the study in July 2015. Interviews were held in Kinyarwanda, digitally recorded, transcribed verbatim, translated into English, and analysed using qualitative content analysis. Most participants reported that they were previously unaware of the complications they had developed, and they claimed that at discharge they should have been better informed about the potential consequences of these complications. Most participants blamed the health care system as the cause of their problems due to the provision of inadequate care. Participants elaborated different strategies for coping with persistent health problems. Pregnancy-related complications negatively affected participants' economic situation due to increased health care expenses and lowered income because of impaired working capacity, and participants expressed fear of encountering the same pregnancy-related health problems during future pregnancies. The findings of this study demonstrate how participants felt that inadequate health care provision during pregnancy, delivery, and the postpartum period was the source of their problems. Participants reported different coping strategies to improve their respective life situation despite persistent health problems. Women's individual postpartum experiences need to be considered and actions taken at the policy level and also by the local community, in terms of the quality of antenatal and postpartum care services, and in sensitizing the local community about the existence of these complications and preparing the community to support the affected women.
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| 40. |
- Sengoma, Jean Paul Semasaka, et al.
(författare)
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Prevalence of pregnancy-related complications and course of labour of surviving women who gave birth in selected health facilities in Rwanda: a health facility-based, cross-sectional study
- 2017
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Ingår i: Bmj Open. - : BMJ. - 2044-6055. ; 7:7
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Tidskriftsartikel (refereegranskat)abstract
- Objectives This study estimated health facility-based prevalence for pre-eclampsia/eclampsia, postpartum haemorrhage and caesarean section (CS) due to prolonged labour/dystocia. The background characteristics of Rwandan pregnant women, the course of labour and the level of healthcare were investigated in relation to pregnancy and delivery outcomes. Methods This is health facility-based study and data were collected in 2014-2015 through structured interviews and medical records (n=817) in Kigali and Northern Province, Rwanda. Frequencies and prevalence were used to describe participants' background factors, labour and deliveryrelated characteristics. Bivariable and multivariable logistic regression models were performed for different background factors and pregnancy/delivery outcomes. Results Pre-eclampsia/eclampsia, postpartum haemorrhage and CS due to prolonged labour/dystocia represented 1%, 2.7% and 5.4% of all participants, respectively. In total, 56.4% of the participants were transferred from facilities with low levels to those with higher levels of healthcare, and the majority were transferred from health centres to district hospitals, with CS as the main reason for transfer. Participants who arrived at the health facility with cervical dilation grade of <= 3 cm spent more hours in maternity ward than those who arrived with cervical dilatation grade of <= 4 cm. Risk factors for CS due to prolonged labour or dystocia were poor households, nulliparity and residence far from health facility. Conclusions The estimated health facility-based prevalence of pregnancy-related complications was relatively low in this sample from Rwanda. CS was the main reason for the transfer of pregnant women from health centres to district hospitals. Upgrading the capacity of health centres in the management of pregnant women in Rwanda may improve maternal and fetal health.
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| 41. |
- Simoen, Michael Roger Andre, 1986, et al.
(författare)
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Characterization of a multimode coplanar waveguide parametric amplifier
- 2015
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Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 118:15, s. 154501-
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Tidskriftsartikel (refereegranskat)abstract
- We characterize a Josephson parametric amplifier based on a flux-tunable quarter-wavelength resonator. The fundamental resonance frequency is ∼1 GHz, but we use higher modes of the resonator for our measurements. An on-chip tuning line allows for magnetic flux pumping of the amplifier. We investigate and compare degenerate parametric amplification, involving a single mode, and nondegenerate parametric amplification, using a pair of modes. We show that we reach quantum-limited noise performance in both cases.
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| 42. |
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| 43. |
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| 44. |
- Wang, X., et al.
(författare)
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Mutual projectile and target ionization in 1-MeV/amu N(4+) and N(5+) + He collisions
- 2011
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Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 84:2, s. 022707-
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Tidskriftsartikel (refereegranskat)abstract
- We have studied mutual projectile and target ionization in 1-MeV/amu N(4+) and N(5+) + He collisions in kinematically complete experiments by measuring the momenta of the recoil ion and both ejected electrons in coincidence with the charge-changed projectiles. By means of four-particle Dalitz plots, in which multiple differential cross sections are presented as a function of the momenta of all four particles, experimental spectra are compared with theoretical results from various models. The experimental data are qualitatively reproduced by higher-order calculations, where good agreement is achieved for N(5+) + He collisions, while some discrepancies persist for N(4+) + He collisions.
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| 45. |
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