Hasil untuk "Property"

Youfu Wang, A. Hu

Carbon quantum dots (CQDs, C-dots or CDs), which are generally small carbon nanoparticles (less than 10 nm in size) with various unique properties, have found wide use in more and more fields during the last few years. In this feature article, we describe the recent progress in the field of CQDs, focusing on their synthetic methods, size control, modification strategies, photoelectric properties, luminescent mechanism, and applications in biomedicine, optronics, catalysis and sensor issues.

Florence Croisier, C. Jérôme

Abstract Derived from chitin, chitosan is a unique biopolymer that exhibits outstanding properties, beside biocompatibility and biodegradability. Most of these peculiar properties arise from the presence of primary amines along the chitosan backbone. As a consequence, this polysaccharide is a relevant candidate in the field of biomaterials, especially for tissue engineering. The current article highlights the preparation and properties of innovative chitosan-based biomaterials, with respect to their future applications. The use of chitosan in 3D-scaffolds – as gels and sponges – and in 2D-scaffolds – as films and fibers – is discussed, with a special focus on wound healing application.

A. Bridgwater

K. Lee, D. Mooney

Eun-Hyun Lee

PURPOSE The purpose of this study was to review articles related to the psychometric properties of the Perceived Stress Scale (PSS). METHODS Systematic literature searches of computerized databases were performed to identify articles on psychometric evaluation of the PSS. RESULTS The search finally identified 19 articles. Internal consistency reliability, factorial validity, and hypothesis validity of the PSS were well reported. However, the test-retest reliability and criterion validity were relatively rarely evaluated. In general, the psychometric properties of the 10-item PSS were found to be superior to those of the 14-item PSS, while those of the 4-item scale fared the worst. The psychometric properties of the PSS have been evaluated empirically mostly using populations of college students or workers. CONCLUSION Overall, the PSS is an easy-to-use questionnaire with established acceptable psychometric properties. However, future studies should evaluate these psychometric properties in greater depth, and validate the scale using diverse populations.

A. Bandura

Qinghua Zhang, Karine de Oliveira Vigier, S. Royer et al.

I. Ward, J. Sweeney, W. Sweeney

Qing Hua Wang, K. Kalantar-zadeh, A. Kis et al.

S. Pei, Hui‐Ming Cheng

J. Scheller, A. Chalaris, D. Schmidt-Arras et al.

L. Mokkink, C. Terwee, D.walaa badawy et al.

BackgroundAim of the COSMIN study (COnsensus-based Standards for the selection of health status Measurement INstruments) was to develop a consensus-based checklist to evaluate the methodological quality of studies on measurement properties. We present the COSMIN checklist and the agreement of the panel on the items of the checklist.MethodsA four-round Delphi study was performed with international experts (psychologists, epidemiologists, statisticians and clinicians). Of the 91 invited experts, 57 agreed to participate (63%). Panel members were asked to rate their (dis)agreement with each proposal on a five-point scale. Consensus was considered to be reached when at least 67% of the panel members indicated ‘agree’ or ‘strongly agree’.ResultsConsensus was reached on the inclusion of the following measurement properties: internal consistency, reliability, measurement error, content validity (including face validity), construct validity (including structural validity, hypotheses testing and cross-cultural validity), criterion validity, responsiveness, and interpretability. The latter was not considered a measurement property. The panel also reached consensus on how these properties should be assessed.ConclusionsThe resulting COSMIN checklist could be useful when selecting a measurement instrument, peer-reviewing a manuscript, designing or reporting a study on measurement properties, or for educational purposes.

L. Mokkink, C. Terwee, D.walaa badawy et al.

J. P. Thiery, J. P. Thiery, H. Acloque et al.

Changgu Lee, Xiaoding Wei, J. Kysar et al.

C. Villani

G. Grynkiewicz, M. Poenie, Roger Y. TsienB

Andrew T. Levin, C. Lin, C. Chu

L. Verlet

M. L. Laucks