| 1. |
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| 2. |
- Ahmad, Mohammed Metwally Gomaa, et al.
(författare)
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Effect of precursor solutions on the structural and optical properties of sprayed NiO thin films
- 2017
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Ingår i: Materials Science in Semiconductor Processing. - : Elsevier BV. - 1369-8001 .- 1873-4081. ; 64, s. 32-38
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Tidskriftsartikel (refereegranskat)abstract
- Nickel oxide thin films were deposited by a simple and low-cost spray pyrolysis technique using three different precursors: nickel nitrate, nickel chloride, and nickel acetate on corning glass substrates. X-ray diffraction show that the NiO films are polycrystalline and have a cubic crystal structure, although predominantly with a preferred 111-orientation in the growth direction and a random in-plane orientation. The deconvolution of the Ni 2p and O 1s core level X-ray photoelectron-spectra of nickel oxides produced by using different precursors indicates a shift of the binding energies. The sprayed NiO deposited from nickel nitrate has an optical transmittance in the range of 60-65% in the visible region. The optical band gap energies of the sprayed NiO films deposited from nickel nitrate, nickel chloride and nickel acetate are 3.5, 3.2 and 3.43 eV respectively. Also, the extinction coefficient and refractive index of NiO films have been calculated from transmittance and reflectance measurements. The average value of refractive index for sprayed films by nickel nitrate, nickel chloride and nickel acetate are 2.1, 1.6 and 1.85 respectively. It is revealed that the band gap and refractive index of NiO films by using nickel nitrate corresponds to the commonly reported values. We attribute the observed behavior in the optical band gap and optical constants as due to the change of the Ni/O ratio.
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| 3. |
- Andrighetto, Giulia, et al.
(författare)
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Changes in social norms during the early stages of the COVID-19 pandemic across 43 countries
- 2024
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Ingår i: Nature Communications. - : NATURE PORTFOLIO. - 2041-1723. ; 15:1
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Tidskriftsartikel (refereegranskat)abstract
- The emergence of COVID-19 dramatically changed social behavior across societies and contexts. Here we study whether social norms also changed. Specifically, we study this question for cultural tightness (the degree to which societies generally have strong norms), specific social norms (e.g. stealing, hand washing), and norms about enforcement, using survey data from 30,431 respondents in 43 countries recorded before and in the early stages following the emergence of COVID-19. Using variation in disease intensity, we shed light on the mechanisms predicting changes in social norm measures. We find evidence that, after the emergence of the COVID-19 pandemic, hand washing norms increased while tightness and punishing frequency slightly decreased but observe no evidence for a robust change in most other norms. Thus, at least in the short term, our findings suggest that cultures are largely stable to pandemic threats except in those norms, hand washing in this case, that are perceived to be directly relevant to dealing with the collective threat. Tightness-looseness theory predicts that social norms strengthen following threat. Here the authors test this and find that, after the emergence of the COVID-19 pandemic, hand washing norms increased, but no evidence was observed for a robust change in most other norms.
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| 4. |
- Eriksson, Kimmo, et al.
(författare)
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Perceptions of the appropriate response to norm violation in 57 societies
- 2021
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Ingår i: Nature Communications. - : Nature Research. - 2041-1723. ; 12:1
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Tidskriftsartikel (refereegranskat)abstract
- Norm enforcement may be important for resolving conflicts and promoting cooperation. However, little is known about how preferred responses to norm violations vary across cultures and across domains. In a preregistered study of 57 countries (using convenience samples of 22,863 students and non-students), we measured perceptions of the appropriateness of various responses to a violation of a cooperative norm and to atypical social behaviors. Our findings highlight both cultural universals and cultural variation. We find a universal negative relation between appropriateness ratings of norm violations and appropriateness ratings of responses in the form of confrontation, social ostracism and gossip. Moreover, we find the country variation in the appropriateness of sanctions to be consistent across different norm violations but not across different sanctions. Specifically, in those countries where use of physical confrontation and social ostracism is rated as less appropriate, gossip is rated as more appropriate. Little is known about peoples preferred responses to norm violations across countries. Here, in a study of 57 countries, the authors highlight cultural similarities and differences in peoples perception of the appropriateness of norm violations.
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| 5. |
- Eriksson, Monica, 1952-, et al.
(författare)
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Conceptual Clarification of Wellness and Sense of Coherence (SOC). : Rodgers' evolutionary concept analysis in health care settings
- 2018
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Ingår i: Nordic Conference in Nursing Research Methods and Networks for the future. - 9788299531528 ; , s. 31-31
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Konferensbidrag (refereegranskat)abstract
- Background: Clarification of concepts is important in the process of developing theories and concepts. The concept of «wellness» is frequently used, but the content is still unclear. Is the content of «wellness» the same as «health»,«sense of coherence», «wellbeing», «spirituality», «quality oflife» or another contentObjective: To conceptually explore the concept of«wellness» in health care settings, and relate the results to the salutogenic core concept SOC.Method: Rodger's evolutionary concept analysis is used for the theoretical analysis of the data. The focus has been on attributes, related concepts, consequences, antecedents,references, exemplars and implications. The literature search has been performed through manual review of reference lists and online search in databases for relevant papers. The abstracts has been examined to identify relevant studies for further review. The inclusion criteria was peer reviewed papers in English, published in scientific journals using the keywords wellness/health/health care/healthcare and wellness/sense of coherence/salutogenesis, discussing and/or defining the concept of wellness. The search was run in Cinahl and PubMed via EBSCO and in ProQuest. Results: Fifty studies met the inclusion criteria. Preliminary results confirm a multidimensional property of «wellness». It seems to be used interchangeable with related concepts such as «health», «SOC», «wellbeing», «spirituality» or«quality of life» without a deeper clarification of theoretical aspects. A general impression is that wellness is strongly related to individual lifestyle and health behavior.
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| 6. |
- Eriksson, Monica, 1952-, et al.
(författare)
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Meaning of wellness in caring science based on Rodgers's evolutionary concept analysis
- 2024
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Ingår i: Scandinavian Journal of Caring Sciences. - West Sussex : John Wiley & Sons. - 0283-9318 .- 1471-6712. ; 38:1, s. 185-99
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Tidskriftsartikel (refereegranskat)abstract
- Background: Wellness is a holistic, multidimensional, and process-oriented property on a continuum. It has been used interchangeably with and is undifferentiated from concepts such as health and well-being without an in-depth clarification of its theoretical foundations and a reflection on its meaning. The concept of wellness is frequently used, but its definition remains unclear. Aim: To conceptually and theoretically explore the concept of wellness to contribute to a deeper understanding in caring science. Method: Rodgers' evolutionary concept analysis was applied to the theoretical investigation of data from publications of international origins. The focus was on antecedents, attributes, consequences, surrogate and related terms, and contextual references. A literature search was performed through a manual review of reference lists and an online search in CINAHL and PubMed via EBSCO, and in ProQuest. Abstracts were examined to identify relevant studies for further review. The inclusion criteria were peer-reviewed papers in English; papers published in scientific journals using the surrogate terms ‘wellness’, ‘health’, ‘health care’, and ‘health care and wellness’; and papers discussing and/or defining the concept of wellness. Twenty-six studies met the inclusion criteria. Results: Based on the findings from this concept analysis, a definition of wellness was developed: ‘a holistic and multidimensional concept represented on a continuum of being well that goes beyond health’. Implications for nursing practice were correspondingly presented. Conclusion: Wellness is defined as a holistic and comprehensive multidimensional concept represented on a continuum of being well, that goes beyond health. It calls attention by applying the salutogenic perspective to health promotion in caring science. It is strongly related to individual lifestyle and health behaviour and is frequently used interchangeably with health and well-being without an in-depth clarification of its theoretical foundation.
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| 7. |
- Esberg, Anders, et al.
(författare)
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Corynebacterium matruchotii Demography and Adhesion Determinants in the Oral Cavity of Healthy Individuals
- 2020
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Ingår i: Microorganisms. - : MDPI. - 2076-2607. ; 8:11
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Tidskriftsartikel (refereegranskat)abstract
- Corynebacterium matruchotii may be key in tooth biofilm formation, but information about demographics, bacterial partners, and binding ligands is limited. The aims of this study were to explore C. matruchotii's demography by age and colonization site (plaque and saliva), in vitro bacterial-bacterial interactions in coaggregation and coadhesion assays, and glycolipids as potential binding ligands in thin-layer chromatogram binding assays. C. matruchotii prevalence increased from 3 months to 18 years old, with 90% and 100% prevalence in saliva and tooth biofilm, respectively. C. matruchotii aggregated in saliva in a dose-dependent manner but lacked the ability to bind to saliva-coated hydroxyapatite. In vivo, C. matruchotii abundance paralleled that of Actinomyces naeslundii, Capnocytophaga sp. HMT 326, Fusobacterium nucleatum subsp. polymorphum, and Tannerella sp. HMT 286. In vitro, C. matruchotii bound both planktonic and surface-bound A. naeslundii, Actinomyces odontolyticus, and F. nucleatum. In addition, C. matruchotii exhibited the ability to bind glycolipids isolated from human erythrocytes (blood group O), human granulocytes, rabbit intestine, human meconium, and rat intestine. Binding assays identified candidate carbohydrate ligands as isoglobotriaosylceramide, Gal alpha 3-isoglobotriaosylceramide, lactotriaosylceramide, lactotetraosylceramide, neolactotetraosylceramide, and neolactohexaosylceramide. Thus, C. matruchotii likely uses specific plaque bacteria to adhere to the biofilm and may interact with human tissues through carbohydrate interactions.
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| 8. |
- Gharavi, Mohammad Amin, et al.
(författare)
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Microstructure and thermoelectric properties of CrN and CrN/Cr2N thin films
- 2018
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Ingår i: Journal of Physics D. - : Institute of Physics Publishing (IOPP). - 0022-3727 .- 1361-6463. ; 51:35
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Tidskriftsartikel (refereegranskat)abstract
- CrN thin films with an N/Cr ratio of 95% were deposited by reactive magnetron sputtering onto (0 0 0 1) sapphire substrates. X-ray diffraction and pole figure texture analysis show CrN (1 1 1) epitaxial growth in a twin domain fashion. By changing the nitrogen versus argon gas flow mixture and the deposition temperature, thin films with different surface morphologies ranging from grainy rough textures to flat and smooth films were prepared. These parameters can also affect the CrNx system, with the film compound changing between semiconducting CrN and metallic Cr2N through the regulation of the nitrogen content of the gas flow and the deposition temperature at a constant deposition pressure. Thermoelectric measurements (electrical resistivity and Seebeck coefficient), scanning electron microscopy, and transmission electron microscopy imaging confirm the changing electrical resistivity between 0.75 and 300 , the changing Seebeck coefficient values between 140 and 230 , and the differences in surface morphology and microstructure as higher temperatures result in lower electrical resistivity while gas flow mixtures with higher nitrogen content result in single phase cubic CrN.
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| 9. |
- Schallmeiner, Edith, et al.
(författare)
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Sensitive protein detection via triple-binder proximity ligation assays
- 2007
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Ingår i: Nature Methods. - : Springer Science and Business Media LLC. - 1548-7091 .- 1548-7105. ; 4:2, s. 135-137
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Tidskriftsartikel (refereegranskat)abstract
- The detection of weakly expressed proteins and protein complexes in biological samples represents a fundamental challenge. We have developed a new proximity-ligation strategy named 3PLA that uses three recognition events for the highly specific and sensitive detection of as little as a hundred molecules of the vascular endothelial growth factor (VEGF), the biomarkers troponin I, and prostate-specific antigen (PSA) alone or in complex with an inhibitor--demonstrating the versatility of 3PLA.
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| 10. |
- Speliotes, Elizabeth K., et al.
(författare)
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Association analyses of 249,796 individuals reveal 18 new loci associated with body mass index
- 2010
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Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1061-4036 .- 1546-1718. ; 42:11, s. 937-948
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Tidskriftsartikel (refereegranskat)abstract
- Obesity is globally prevalent and highly heritable, but its underlying genetic factors remain largely elusive. To identify genetic loci for obesity susceptibility, we examined associations between body mass index and ~2.8 million SNPs in up to 123,865 individuals with targeted follow up of 42 SNPs in up to 125,931 additional individuals. We confirmed 14 known obesity susceptibility loci and identified 18 new loci associated with body mass index (P < 5 × 10−8), one of which includes a copy number variant near GPRC5B. Some loci (at MC4R, POMC, SH2B1 and BDNF) map near key hypothalamic regulators of energy balance, and one of these loci is near GIPR, an incretin receptor. Furthermore, genes in other newly associated loci may provide new insights into human body weight regulation.
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| 11. |
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Tuning the Emission Energy of Chemically Doped Graphene Quantum Dots
- 2016
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Ingår i: Nanomaterials. - : MDPI AG. - 2079-4991. ; 6:11
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Tidskriftsartikel (refereegranskat)abstract
- Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and band gap tuning also pose a serious challenge. In this study, we tuned the emission energy of GQDs by substitutional doping using chlorine, nitrogen, boron, sodium, and potassium dopants in solution form. Photoluminescence data obtained from (Cl- and N-doped) GQDs and (B-, Na-, and K-doped) GQDs, respectively exhibited red- and blue-shift with respect to the photoluminescence of the undoped GQDs. X-ray photoemission spectroscopy (XPS) revealed that oxygen functional groups were attached to GQDs. We qualitatively correlate red-shift of the photoluminescence with the oxygen functional groups using literature references which demonstrates that more oxygen containing groups leads to the formation of more defect states and is the reason of observed red-shift of luminescence in GQDs. Further on, time resolved photoluminescence measurements of Cl- and N-GQDs demonstrated that Cl substitution in GQDs has effective role in radiative transition whereas in N-GQDs leads to photoluminescence (PL) quenching with non-radiative transition to ground state. Presumably oxidation or reduction processes cause a change of effective size and the bandgap.
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| 12. |
- Van Doesum, Niels J., et al.
(författare)
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Social mindfulness and prosociality vary across the globe
- 2021
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 118:35
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Tidskriftsartikel (refereegranskat)abstract
- Humans are social animals, but not everyone will be mindful of others to the same extent. Individual differences have been found, but would social mindfulness also be shaped by one's location in the world? Expecting cross-national differences to exist, we examined if and how social mindfulness differs across countries. At little to no material cost, social mindfulness typically entails small acts of attention or kindness. Even though fairly common, such low-cost cooperation has received little empirical attention. Measuring social mindfulness across 31 samples from industrialized countries and regions (n = 8,354), we found considerable variation. Among selected country-level variables, greater social mindfulness was most strongly associated with countries' better general performance on environmental protection. Together, our findings contribute to the literature on prosociality by targeting the kind of everyday cooperation that is more focused on communicating benevolence than on providing material benefits.
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| 13. |
- Viklund, Peter, et al.
(författare)
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Corrosion resistance of 304L, 310S and APMT in simulated biomass gasification environments
- 2011
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Ingår i: European Corrosion Congress 2011, EUROCORR 2011. - : Curran Associates, Inc.. - 9781618394125 ; , s. 1035-1043
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Konferensbidrag (refereegranskat)abstract
- Gasification of biomass and waste is one feasible solution for the production of environmentally-friendly substitutes for motor fuels and chemicals. In the present study the austenitic stainless steels 304L and 310S, together with the ferritic APMT were exposed to conditions expected during biomass gasification. Isothermal experiments were performed for 200h at 500°C and 600°C in a bulk gas composition of 40%H 2-30%CO-20%CO 2-10%H 2O. Different exposures were conducted with HCl-concentrations of 0,500 and 1000 ppm. The corrosion behaviour was analysed using SEM-EDS, GDOES, XRD and CLSM. In the syngas atmosphere without HCl no signs of pitting attack or carbon ingress could be observed. In the presence of HCl, pitting attack and graphite formation became evident for both the 304L and 310S alloys. The attack became more severe at higher temperature and HCl-concentration. While the austenitic stainless steels suffered from accelerated corrosion in the presence of chlorine, the ferritic steel APMT displayed a smooth and thin oxide scale under all conditions. The general materials performance observed were of the order APMT > 310S > 304L. The results are discussed in terms of a detrimental effect of chlorine on the ability to form protective oxide scales.
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