A-D hypersurface of su(n)

Vitamin D Status of Tehran Taxi Drivers: How Efficient Is the Occupational Exposure to Sun? A Case-control Study

Background and Objectives: Day-shift taxi drivers have a long duration of direct sun exposure. However, the efficiency of this occupational exposure in vitamin D synthesis has not been addressed yet. The aim of this study was to assess the vitamin D status of taxi drivers in Tehran, and examine vitamin D status association with some anthropometric and circulating biomarkers. Materials and Meth...

Curvature Groups of a Hypersurface

A cochain complex associated with the vector 1-form determined by the first and second fundamental tensors of a hypersurface M in E"+l is introduced. Its cohomology groups HP(M), called curvature groups, are isomorphic with the cohomology groups of M with coefficients in a subsheaf %R of the sheaf S of closed vector fields on M. If M is a minimal variety, the same conclusion is valid with S^ re...

Curvature of a Closed Hypersurface

Vitamin D, sun, sunbeds and health.

OBJECTIVE To review the health effects of solar radiation, sunbeds and vitamin D. DESIGN The literature was searched in the electronic database MEDLINE to indentify published data between 1981 and 2011. Studies were included if they reported relative risk for cutaneous malignant melanoma (CMM) associated with sunbed use, vitamin D and UV effects on human health. SETTING Data from different ...

Vitamin D: something new under the sun

Cardiovascular (CV) disease is the major cause of death in the general population and in chronic kidney disease (CKD) patients. In particular, the CV morbidity and mortality rate is highly prevalent in CKD patients because of frequently concomitant hypertension, peripheral vascular disease, heart failure, vascular calcification (VC), diabetes and mineral bone disease (CKD-MBD). More recently, a...