Background : Some studies have shown that the serum concentration of 25- hydroxy vitamin D which is represent the status of body vitamin D, has a diverse relationship with obesity status, and the risk of obesity decreases in people with high level of 25- hydroxy vitamin D. The aim of this study is to investigate the correlation between the serum level of 25- hydroxy vitamin D and anthropometric...

The preparation of a series of N-hydroxy peptides is described, along with their acylation on the oxygen of the pseudopeptide bond. Nineteen N-acyloxy peptides, first examples of this new class of pseudopeptides, were thus synthesized; they present a range of acyl groups, including N-protected amino acyl groups. Possibilities of elongation for these pseudopeptides were also investigated.

Abstract Many coumarin derivatives have good biological activity and application value in fluorescent probes. Therefore, synthetic routes to also attracted the attention of many research groups. In this work, based on Pechmann synthesis method, influence various Lewis acids reaction was discussed, optimal conditions 7-hydroxy-4-substituted coumarins were explored. Based experimental results, a ...

Since March 2020, the Coronavirus has widely spread in Egypt and negatively affected people’s lives, especially vulnerable groups. The government, private sectors, social societies had played significant roles supporting needed groups to overcome crisis. present article studied Egyptian authorities’ measures implemented mitigate pandemic’s negative impact on groups—women, children, informal wor...