Introduction The vibration motion of nuclei in molecules is one of the most important factors which conditions physico-chemical properties and reactivity of substances. The solution for classical equations subject to force filed, discovered from the Schrödinger’s equation in adiabatic approximation, allows determining the forms of vibration of polyatomic molecules as well as their frequencies. ...

Anabolic steroids are widely abused in animal sports to improve their performance. The present study identifies the possible metabolites of boldenone camel liver. A high-resolution accurate QE mass spectrometer was used identify parent and its metabolites. To investigate phase 1 biotransformation camel, sodium phosphate buffer NADPH were used. Chromatographic separation carried out on a Thermo ...

Several recent investigations indicate the existence of gender-related systematic trends in peer review proposals for observations on astronomical facilities. This includes National Radio Astronomy Observatory (NRAO) where there is evidence a gender imbalance rank with male principal investigators (PIs) favored over female PIs. Since semester 2017A (17A), NRAO has taken following steps: (1) inf...

Abstract Novel tri-and tetra-cyclic compounds based on the thiadiazolopyrimidine ring system were synthesized, and their antimicrobial activity was estimated. The obtained results evidenced substantial efficiencies of pyrano-thiadiazolopyrimidine 8a–b 9a–b toward two strains gram-positive bacteria ( S. aureus B. cereus ). Besides, tetracyclic pyrazolopyrimido-thiadiazolopyrimidine derivatives 1...

A Wittig reaction of 3-hydroxyphtalide (11) gave ortho-sty­rene-2-carboxylic acid (12). Its Weinreb amide 13 acylated heterosub­stituted methyllithiums. This led to aryl “methyl” ketones whose sp3-carbon was substituted by Cl + OMe (in 14a), 2 ´ 14b), OtBu 17a), SPh 17b) or SO2Ph 17c). The enolates these were C-allylated. furnished the benzene-fused octa-1,8-dienones 7a-b and 9a-c, respectively...