Spatially resolved photoluminescence analysis of the role of Se in CdSeTe thin films.

Evidence from cross-sectional electron microscopy has previously shown that Se passivates defects in CdSeTe solar cells, and that this is the reason for better lifetimes and voltages in these devices. Here, we utilise spatially resolved photoluminescence measurements of CdSeTe thin films on glass to directly study the effects of Se on carrier recombination in the material, isolated from the impact of conductive interfaces and without the need to prepare cross-sections through the samples. We find further evidence to support Se passivation of grain boundaries, but also identify an increase in below-bandgap photoluminescence that indicates the presence of Se-enhanced defects in grain interiors.

Sorry you asked? , and the battles over patent-eligibility.

Genetic testing for inherited cancer risk changed dramatically when the US Supreme Court handed down unanimous rulings in (2012) and (2013). Those decisions struck down claims to methods based on 'laws of nature' () and DNA molecules corresponding to sequences found in nature (). Senators Thom Tillis (R-NC) and Christopher Coons (D-DE) introduced legislation that would abrogate those decisions and specify narrow statutory exclusions to patent-eligibility in §101 of the US Patent Act.

Breast Density Knowledge and Awareness Among Latinas in a Low-Resource Setting.

Purpose: Latinas in low-resource settings face additional barriers to understanding mammographic breast density (MBD) implications. The authors compared MBD awareness and knowledge in Latinas from a safety-net clinic in Arizona with a national sample.

Methods: Latinas 40 to 74 years of age were recruited within a safety-net clinic during screening mammography appointments from 2016 to 2019 (AZ cohort) and from a nationally representative online panel in 2017 (NS cohort).

Comparison of the international Burn Injury Database nurse dependency tool with the Safer Nursing Care Tool: Observational study.

Background: Safe and effective nurse staffing is widely recognised as an important issue to ensure quality patient care and reduce mortality. There are many nurse dependency tools described in the literature but no gold standard tool that can be used in all specialities. In burn care there are even fewer burn specific tools and none reported for use in the UK to date.

Impact of metformin on cardiovascular disease: a meta-analysis of randomised trials among people with type 2 diabetes.

Aims/hypothesis: Metformin is the most-prescribed oral medication to lower blood glucose worldwide. Yet previous systematic reviews have raised doubts about its effectiveness in reducing risk of cardiovascular disease, the most costly complication of type 2 diabetes. We aimed to systematically identify and pool randomised trials reporting cardiovascular outcomes in which the effect of metformin was 'isolated' through comparison to diet, lifestyle or placebo.