Pt(II) and Pd(II) Complexes with β-Alanine

A sequence of stages in the syntheses of isomeric bisamino acid complexes of Pt(II) with β-aminopropionic acid (β-alanine = β-AlaH) has been studied by the 195Pt NMR spectroscopy. The techniques have been developed of the synthesis of the cis- and trans-bischelates of Pt(II) and Pd(II) with β-alanine as well as of the halide complexes of trans-[M(β-AlaH)2Cl2] (M = Pt, Pd) and trans-K2[Pt(β-Ala)2I2] types. The NMR spectroscopy and IR spectroscopy (in the nuclei of 195Pt,13C,1H) and X-ray diffraction analysis have been used to examine the structures of the synthesized compounds

Application of hydrogenation to low-temperature cleaning of the Si(001) surface in the processes of molecular-beam epitaxy: Investigation by STM, RHEED and HRTEM

Structural properties of the clean Si(001) surface obtained as a result of low-temperature (470--650C) pre-growth annealings of silicon wafers in a molecular-beam epitaxy chamber have been investigated. To decrease the cleaning temperature, a silicon surface was hydrogenated in the process of a preliminary chemical treatment in HF and NH_4F aqueous solutions. It has been shown that smooth surfaces composed by wide terraces separated by monoatomic steps can be obtained by dehydrogenation at the temperatures > 600C, whereas clean surfaces obtained at the temperatures < 600C are rough. It has been found that there exists a dependence of structural properties of clean surfaces on the temperature of hydrogen thermal desorption and the process of the preliminary chemical treatment. The frequency of detachment/attachment of Si dimers from/to the steps and effect of the Ehrlich-Schwoebel barrier on ad-dimer migration across steps have been found to be the most probable factors determining a degree of the resultant surface roughness.Comment: 8 pages, 8 figures; version accepted to J. Appl. Phy

Analysis of the Internal Environment of the Pharmaceutical Distributor Operation in Russia Using SWOT Analysis

BACKGROUND: The general directions of the organization’s development should be clearly formulated, i.e., a business strategy should be developed in order to achieve the long-term competitive advantages in the operation of a pharmaceutical distributor with its own pharmacy warehouse in Russia. AIM: Identification of strengths and weaknesses, opportunities and threats in the operation of a pharmaceutical distributor with its own pharmacy warehouse. MATERIALS AND METHODS: The SWOT analysis was used to analyze the environment, which enabled a joint study of the external and internal environment. During the study, content analysis of secondary sources of information was used (data from the Federal State Statistics Service, DSM Group marketing agency), as well as sociological analysis. RESULTS AND DISCUSSION: During the SWOT analysis, ten factors were identified that ensured the normal functioning of the pharmaceutical distributor, as well as 11 negative factors were identified that negatively affected the operation of the pharmacy warehouse. The article presents qualitative description of the strengths and weaknesses. Ten factors were attributed to the favorable opportunities for the organization’s activities; seven positions were considered as threats to the activities of the distributor. It should be noted that all factors of external environment are in a state of strong mutual influence. A change in one of the factors necessarily leads to a change in other factors. Therefore, their study and analysis should not be carried out separately, but systematically, with tracking not only the actual changes in one factor but also the process how these changes will affect other factors. After identifying strengths and weaknesses, opportunities and threats, a table was compiled and all intersections were analyzed, i.e., all possible pairwise combinations that would help determining the future strategy. At present, the strategic goal of a number of wholesale companies in the pharmaceutical market is defined as increasing return on investment. CONCLUSION: In this article, SWOT analysis has been used to provide some suggestions on overcoming weaknesses and threats in the activities of a pharmaceutical distributor, as well as on proper use of strengths and opportunities. During the study, pharmaceutical industry practitioners discussed the impact of various economic factors, strengths, opportunities, weaknesses, and threats regarding the activities of pharmaceutical distributor, as well as related problems and prospects for the future

Molecular cloning and expression pattern of rpr-1, a resiniferatoxin-binding, phosphotriesterase-related protein, expressed in rat kidney tubules1The sequence of rpr-1 has the EMBL accession number X99477.1

AbstractBacterial phosphotriesterases are enzymes that hydrolyse phosphotriester-containing organophosphate pesticides. Resiniferatoxin is a vanilloid that desensitises nociceptive neurons. By screening a rat cDNA library with labelled resiniferatoxin, we unexpectedly isolated a novel rat phosphotriesterase homologue, here named rpr-1, that encodes a 349 amino acid, 39 kDa protein (confirmed by in vitro translation). Northern blotting and in situ hybridisation show expression primarily in proximal tubules of the kidney, in which rpr-1 distribution correlates with resiniferatoxin-binding activity. These results suggest an unsuspected link between the phosphotriesterase enzyme family and resiniferatoxin toxicity and pharmacology

PREREQUISITES FOR THE FORMATION OF D - ENANTIOMERS OF AMINO ACIDS OF ANIMAL PROTEINS IN THE MANUFACTURING PROCESS OF MEAT PRODUCTS

The paper presents studies on the presence or formation of d - enantiomers of amino acids in animal tissues or organs, in meat products during its production processes. It is shown that the process of epimerization of L - amino acid residues with the formation of D-enantiomers affect the reduction of the properties of food products, including the formation of oncoassociated subsequent effects on the human body.Modern control of the quantitative and qualitative composition of d-enantiomers of amino acids in food products, monitoring for stratification of the increased risk of toxic compounds in food are becoming an urgent medical and social problem. The studies planned in this paper are aimed at developing approaches to the creation of food products that reduce the oncogenic alimentary load on human health by solving the problem of technological modification of production, eliminating or minimizing post - translational modifications in proteins that contribute to the formation of d-enantiomers of amino acids. These studies will create a scientific and technological database associated with the risk assessment of carcinogenesis in protein matrices of animal origin. Based on the presented analysis, the task of developing and testing a method to control the accumulation of D-isomers in the course of various technological processes of meat production is extremely popular.The paper presents studies on the presence or formation of d - enantiomers of amino acids in animal tissues or organs, in meat products during its production processes. It is shown that the process of epimerization of L - amino acid residues with the formation of D-enantiomers affect the reduction of the properties of food products, including the formation of oncoassociated subsequent effects on the human body.Modern control of the quantitative and qualitative composition of d-enantiomers of amino acids in food products, monitoring for stratification of the increased risk of toxic compounds in food are becoming an urgent medical and social problem. The studies planned in this paper are aimed at developing approaches to the creation of food products that reduce the oncogenic alimentary load on human health by solving the problem of technological modification of production, eliminating or minimizing post - translational modifications in proteins that contribute to the formation of d-enantiomers of amino acids. These studies will create a scientific and technological database associated with the risk assessment of carcinogenesis in protein matrices of animal origin. Based on the presented analysis, the task of developing and testing a method to control the accumulation of D-isomers in the course of various technological processes of meat production is extremely popular

VALUE-SEMANTIC SPHERE OF STUDENTS OF UNIVERSITIES OF VARIOUS REGIONS OF RUSSIA

Purpose. In this article, the similarities and differences of the value-semantic sphere of students of Russian universities are considered as a subject of research. Keeping in mind the regional specifics, it is assumed that the existing similarities in the value-semantic sphere of students of Russian universities in different regions will prevail over the differences. The study involved students of universities in Samara, Omsk, Vladikavkaz and Voronezh. Methodology. Standardized test methods and methods of mathematical statistics were used to collect and process empirical data. Results. The study revealed statistically significant differences in the degree of meaningfulness of life and the level of internality of students. The greatest discrepancy in the degree of importance was revealed regarding the values of health, material well-beingнаряду, creativity, family, career, service, glory and rest. At the same time, statistically significant differences in self-actualization and personality orientation were not found. The study participants from different cities showed mostly normal and inflated levels of self-esteem and self-acceptance, most of the students prefer to live in the present, not to postpone and not to plan for a long time ahead. There was also a similarity in the desire to adhere to certain principles, as opposed to showing flexibility and reactivity. Practical implications. The results of this study will be useful in organizing extracurricular educational work with students, as a basis for the formation and development of their moral self-awareness and subjectivity, as well as the development of educational motivation and professional identity

EEG revealed improved vigilance regulation after stress exposure under Nx4: A randomized, placebo-controlled, double-blind, cross-over trial

ObjectivesVigilance is characterized by alertness and sustained attention. The hyper-vigilance states are indicators of stress experience in the resting brain. Neurexan (Nx4) has been shown to modulate the neuroendocrine stress response. Here, we hypothesized that the intake of Nx4 would alter brain vigilance states at rest.MethodIn this post-hoc analysis of the NEURIM study, EEG recordings of three, 12 min resting-state conditions in 39 healthy male volunteers were examined in a randomized, placebo-controlled, double-blind, cross-over clinical trial. EEG was recorded at three resting-state sessions: at baseline (RS0), after single-dose treatment with Nx4 or placebo (RS1), and subsequently after a psychosocial stress task (RS2). During each resting-state session, each 2-s segment of the consecutive EEG epochs was classified into one of seven different brain states along a wake-sleep continuum using the VIGALL 2.1 algorithm.ResultsIn the post-stress resting-state, subjects exhibited a hyper-stable vigilance regulation characterized by an increase in the mean vigilance level and by more rigidity in the higher vigilance states for a longer period of time. Importantly, Nx4-treated participants exhibited significantly lower mean vigilance level compared to placebo-treated ones. Also, Nx4- compared to placebo-treated participants spent comparably less time in higher vigilance states and more time in lower vigilance states in the post-stress resting-state.ConclusionStudy participants showed a significantly lower mean vigilance level in the post-stress resting-state condition and tended to stay longer in lower vigilance states after treatment with Nx4. These findings support the known stress attenuation effect of Nx4