[en] Present article considers the coherent states of density matrix qubit for N-level quantum system. This article in general terms discusses the coherent states of qubit matrix for level quantum system in SU (2) and SU (3) and SU (N), which are usually used in quantum information processing. (author)

[en] Present article is devoted to synthesis of propane -1,2-diol ethers of cholanic acids. The synthesis of propane-1,2-diol esters of a number of cholanic acids has been carried out, their structure has been defined by means of infrared and paramagnetic resonance spectroscopy methods. (author)

[en] This article considers the quantum computations based on a multi-level quantum system using nuclear magnetic resonance. Therefore, the author presents quantum calculations based on a multilevel quantum system using nuclear magnetic resonance and nuclear quadrupole resonance (Nqr) on nuclei with spin S ≥12. (author)

[en] To identify peptides bioactivity, 2 di- and 4 tripeptides containing a non-protein amino acid (S)-α-allylglycine (2-aminopent-4-enovic acid) were synthesized. Microbiological studies have revealed that N-tert-butyloxycarbonyl-(S)-alanyl-(S)-)-α-allylglycine, N-tert-butyloxycarbonyl-(S)-alanyl-(S)-)-α-allylglycylglycine, N-tert-butyloxycarbonyl-(S)-alanyl-(S)-)-α-allylglycyl-(S)-alanine peptides suppress the growth of gram negative: E. coli, C. freundii, S. marcesens, S. typhimurinum, Erwinia sp., P. putida and gram positive B. flavum, B. lactofermentum, B. subtilis strains. The studied peptide N-tert-butyloxycarbonylglycyl-(S)-)-α-allylglycyl glycine is an inhibitor of the branched-chain amino acid aminotransferases

No abstract available

[en] Introduction: Alzheimer's disease (AD) is a progressive and irreversible neurodegenerative pathology that causes memory loss and several cognitive disorders, such as memory impairment, language difficulties and behavioral changes. This pathology appears with a higher prevalence in individuals with more advanced age (+65 years). Due to the characteristics of AD and its various complementary methods for diagnosis, the objective of this work was to evaluate the Proton Spectroscopy by Magnetic Resonance for diagnosis of this pathology. Methodology: This work refers to a qualitative exploratory literature search. In which searches were carried out on national and international databases, Medline, Scientific Electronic Electronic Library Online (SCIELO), Scholar Google (Google Scholar), Pubmed and Virtual Health Library (Bvs), considering studies in Portuguese languages to be eligible. and English. Results: AD affects mainly people over 60 years of age, increasing the probability with the aging of individuals, since its manifestations occur due to cognitive and memory degradation, thus constituting a neurodegenerative pathology. The diagnosis of AD. (author)

[en] This article presents the results of synthesis of some new derivatives of 3α, 7β-dihydroxycholanic acid, which proceed along the carboxyl group. The composition and structure of the obtained compounds have been confirmed by infrared and paramagnetic resonance spectroscopy.

[en] Biodiesel is a suitable alternative to replace the petro-diesel. The biodiesel is formed by unsaturated esters easily degraded by interferences of oxygen, temperature, contact with metals or contaminants. The aim of this research was to investigate the biodiesel degradation process via ¹H nuclear magnetic resonance (NMR) spectroscopy, observing the olefinic, bis-allylic and allylic protons signals of the chemical bonds, and by the induction period of the Rancimat. Biodiesel samples with metallic ions (Fe and Cu) and with rosemary natural extract were analyzed. The metal compounds showed a catalytic effect in the samples and the rosemary natural extract showed to be efficient by retarding the degradation process. The extract was ineffective in the presence of iron. Through the ¹H NMR spectra was possible to observe changes in the signal intensities of the olefinic, bis-allylic and allylic protons as well as the formation of oxidation products in the biodiesel in the degradation process. (author)

No abstract available

[en] As a result of condensation of 3-allyl-2-thioxo-2,3-dihydro-1H-spiro[benzo[h]quinazoline-5,1'- cycloheptane] -4(6H)-one with 2-bromo-1-phenylethanone and 2-thioxobenzo [h]quinazolines of various structures, 2-methylthio derivatives of spiro[benzo [h]quinazoline-5,1'-cycloheptane] were synthesized. By the transformations of 3-allyl-2-hydrazinyl-3H-spiro[benzo [h]quinazoline-5,1'-cycloheptan] -4(6H)-one, benzhydrazide, hydrazino-carbonothioylbenzamide, arylidenhydrazides, 4-allyl4H-spiro[benzo[h[1,2,4]triazolo[4,3-a]quinazoline-6,1'-cycloheptan]-5(7H)-one and 4-allyl-1-mercapto-4H- spiro [benzo[h][1,2,4]triazolo[4,3-a]quinazoline-6,1'-cyclo-heptan]-5(7H)-one were synthesized. The latter by alkylation with various halides was converted into 1-alkylthio derivatives