منابع مشابه
Evaluation of seasonal variation in acne vulgaris
Background and Aim: Acne vulgaris is one of the most common skin diseases in adolescents and young adults. Although acne do not physically disable the patient, it can cause significant psychological morbidities. The disease etiology is not fully understood; however, there are several factors involved in the pathogenesis. The aim of this study is to investigate the seasonal variation of acne vul...
متن کاملWintertime vitamin D supplementation inhibits seasonal variation of calcitropic hormones and maintains bone turnover in healthy men.
Vitamin D is suggested to have a role in the coupling of bone resorption and formation. Compared with women, men are believed to have more stable bone remodeling, and thus, are considered less susceptible to the seasonal variation of calcitropic hormones. We examined whether seasonal variation exists in calcitropic hormones, bone remodeling markers, and BMD in healthy men. Furthermore, we deter...
متن کاملSeasonal Turnover in Groundwater
This Licentiate Thesis presents a new approach of understanding leakage in agricultural land. Former studies concentrate on long term measurement of different pollutants in nearby watercourses and streams. The new approach is so far only numerically performed, but will soon be complemented by laboratory tests and field measurements. Our hypothesis is that nutrient leakage into groundwater is ca...
متن کاملSeasonal Variation in Ovine Compact Bone Time-dependent Material Properties
INTRODUCTION: The issue of whether, and to what extent, bone materials and fracture characteristics changes in humans with the seasons is complicated by matters of differential seasonal risk factors, nutritional opportunities, and social interaction. Studies examining seasonal bone turnover, density, and fracture risk have been hindered by wide intersubject variation and contradictory results. ...
متن کاملSeasonal variation in calcitropic hormones and bone accrual in puberty.
The production of 25-hydroxycholecalciferol (25(OH)D) in the liver is dependent on vitamin D obtained from the diet and from exposure to UV light. UV rays stimulate the conversion of provitamin D in the skin to vitamin D, making it available to the liver for hydroxylation to 25(OH)D. The circulating concentrations of 25(OH)D are considered to be reflective of the individual’s total vitamin D ex...
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ژورنال
عنوان ژورنال: Journal of Bone and Mineral Research
سال: 2003
ISSN: 0884-0431
DOI: 10.1359/jbmr.0301218