Inter-Layer Coupling Induced Bandgap Reduction in Ultrathin MoS2

We report on a study of highly crystalline islands of MoS2 grown on HOPG substrate. Using STM/STS we find that the valence band edge shifts as a function of the layer number. Numerical calculations reveal the mechanism underlying the bandgap reduction and the role of the interfacial Sulfur atoms is clarified

Sanitary-epidemiological examination of cancer danger organizations’ passports in Sverdlovsk region

In the publication analyzed the experience of the sanitary-hygienic certification of cancer danger organizations in the Sverdlovsk region. Recommendations for optimization of work on the sanitary- epidemiological expertise of cancer danger productions are given.Проанализирован опыт проведения санитарно-гигиенической паспортизации канцерогеноопасных организаций в Свердловской области. Предложены рекомендации по оптимизации работы по санитарно-эпидемиологической экспертизе канцерогеноопасных производств

Melatonin the "light of night" in human biology and adolescent idiopathic scoliosis

Melatonin "the light of night" is secreted from the pineal gland principally at night. The hormone is involved in sleep regulation, as well as in a number of other cyclical bodily activities and circadian rhythm in humans. Melatonin is exclusively involved in signalling the 'time of day' and 'time of year' (hence considered to help both clock and calendar functions) to all tissues and is thus considered to be the body's chronological pacemaker or 'Zeitgeber'. The last decades melatonin has been used as a therapeutic chemical in a large spectrum of diseases, mainly in sleep disturbances and tumours and may play a role in the biologic regulation of mood, affective disorders, cardiovascular system, reproduction and aging. There are few papers regarding melatonin and its role in adolescent idiopathic scoliosis (AIS). Melatonin may play a role in the pathogenesis of scoliosis (neuroendocrine hypothesis) but at present, the data available cannot clearly support this hypothesis. Uncertainties and doubts still surround the role of melatonin in human physiology and pathophysiology and future research is needed