37 research outputs found

    Изменения аминокислотного пула в теменной доле и гиппокампе крыс при неполной церебральной ишемии

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    Introduction. Amino acids and their derivatives are involved in synaptic transmission as neurotransmitters and neuromodulators, and some of them are involved in the formation of neurotransmitters of the nervous system. Therefore, the study of the state of the amino acid pool in incomplete cerebral ischemia plays a significant role.The objective was to assess the nature of changes in amino acid pool and evaluate their participation in oxidative processes in rats with incomplete cerebral ischemia.Methods and materials. The experiments were carried out on 16 male outbred white rats weighing 260±20 g in compliance with the requirements of the Directive of the European Parliament and of the Council No. 2010/63/EU of September 22, 2010 on the protection of animals used for scientific purposes.Results. Compared with the indicators in the control group, rats with an ischemic period of 1 hour in the parietal lobe had a decrease in the content of sulfur-containing amino acids: methionine by 12 % and cysteate by 28 %. In addition, there was an increase of L-arginine in the parietal lobe by 39 %, and in the hippocampus – by 56 %.Conclusions. The following changes are characteristic for one-hour incomplete cerebral ischemia: a decrease in the content of sulfur-containing amino acids, with a decrease in both methionine and an increase in the content of L-arginine. Changes in the parietal lobe and hippocampus had a similar nature, except for the absence of a drop in the level of cysteate in the hippocampus, as a reflection of the higher sensitivity of the parietal lobe to oxygen deficiency, compared with the hippocampus.Введение. Аминокислоты и их дериваты принимают участие в синаптической передаче как нейротрансмиттеры и нейромодуляторы, а некоторые из них участвуют в образовании медиаторов нервной системы. Поэтому изучение состояния аминокислотного пула при неполной ишемии головного мозга играет значимую роль.Цель – оценить характер изменения пула аминокислот и оценить их участие в оксидативных процессах у крыс с неполной ИГМ.Методы и материалы. Опыты выполнялись на 16 самцах беспородных белых крыс массой 260±20 г с соблюдением требований Директивы Европейского Парламента и Совета № 2010/63/EU от 22.09.2010 г. о защите животных, использующихся для научных целей.Результаты. По сравнению с показателями в группе «контроль» у крыс с продолжительностью ишемического периода 1 час в теменной доле происходило уменьшение содержания серосодержащих аминокислот: метионина на 12 % и цистеата на 28 %. Наряду с этим отмечалось увеличение L-аргинина в теменной доле на 39 %, а в гиппокампе – на 56 %.Выводы. Для одночасовой неполной ишемии головного мозга характерны следующие изменения: уменьшение содержания серосодержащих аминокислот со снижением метионина и повышение содержания L-аргинина. Изменения в теменной доле и гиппокампе носили аналогичный характер, за исключением отсутствия падения уровня цистеата в гиппокампе, как отражение более высокой чувствительности теменной доли к дефициту кислорода по сравнению с гиппокампом

    The ATLAS Transition Radiation Tracker (TRT) proportional drift tube: design and performance

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    A straw proportional counter is the basic element of the ATLAS Transition Radiation Tracker (TRT). Its detailed properties as well as the main properties of a few TRT operating gas mixtures are described. Particular attention is paid to straw tube performance in high radiation conditions and to its operational stability

    The ATLAS TRT electronics

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    The ATLAS inner detector consists of three sub-systems: the pixel detector spanning the radius range 4cm-20cm, the semiconductor tracker at radii from 30 to 52 cm, and the transition radiation tracker (TRT), tracking from 56 to 107 cm. The TRT provides a combination of continuous tracking with many projective measurements based on individual drift tubes (or straws) and of electron identification based on transition radiation from fibres or foils interleaved between the straws themselves. This paper describes the on and off detector electronics for the TRT as well as the TRT portion of the data acquisition (DAQ) system

    Arachnids of medical importance in Brazil: main active compounds present in scorpion and spider venoms and tick saliva

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    THE PROGRAM COMPLEX «ARTHRON», INTENDED FOR THE QUANTITATIVE ASSESSMENT OF ARTICULAR SYNDROME IN RHEUMATIC DISEASES

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    The program complex «Arthron» intended for the quantitative assessment of articular syndrome in rheumatic diseases. It is implemented using object-oriented C # language, interactive development environment MS Visual Studio development and NET 4.0. The program complex «Arthron» can operate under the control of OS Windows XP (SP3) or later. The database server Firebird 2.5 (local or network) is used to store information about patients. The system can be installed on a personal computer, as well as a laptop or tablet, and can be used at the bedside of the patient
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