44 research outputs found
Магнитоэлектрический двигатель для привода рулевой колонки автотранспортного средства
Научная квалификационная работа посещена исследованию пульсаций электромагнитного момента в магнитоэлектрическом двигателе рулевой колонки автотранспортного средства. В первой главе выполнен обзор исследований на тему магнитоэлектрических машин с различной компоновкой магнитов на роторе и осуществлена постановка задачи научной квалификационной работы. Во второй главе рассмотрены вопросы имитационного моделирования магнитоэлектрической машины в конечно-элементной компьютерной среде. Выполнено планирование эксперимента, получена взаимосвязь между количеством пазов ротора, зубцами статора, коэрцитивной силы магнитов с позиции значений электромагнитного момента. В третьей главе выполнен расчет связанной модели магнитоэлектрический двигатель-инвертор напряжения-система управления.Scientific qualification work is visited to a research of pulsations of the electromagnetic torque in the magnetoelectric motor of a steering column of the vehicle. In chapter 1 the review of researches on magnetoelectric machine with various configuration of magnets on a rotor is executed and problem definition of scientific qualification work is carried out. In chapter 2 questions of a simulation modeling of the magnetoelectric machine in the terminating and element computer environment are considered. Scheduling of an experiment is executed, the interrelation between quantity of poles of a rotor, tooths of a stator, a coercive force of magnets from a position of values of the electromagnetic torque is received. In a chapter 3 calculation of the bound model the magnetoelectric motor
Matrix Metalloproteinases in Cardioembolic Stroke : From Background to Complications
Matrix metalloproteinases (MMPs) are endopeptidases participating in physiological
processes of the brain, maintaining the blood–brain barrier integrity and playing a critical role in
cerebral ischemia. In the acute phase of stroke activity, the expression of MMPs increase and is
associated with adverse effects, but in the post-stroke phase, MMPs contribute to the process of
healing by remodeling tissue lesions. The imbalance between MMPs and their inhibitors results
in excessive fibrosis associated with the enhanced risk of atrial fibrillation (AF), which is the main
cause of cardioembolic strokes. MMPs activity disturbances were observed in the development of
hypertension, diabetes, heart failure and vascular disease enclosed in CHA2DS2VASc score, the scale
commonly used to evaluate the risk of thromboembolic complications risk in AF patients. MMPs
involved in hemorrhagic complications of stroke and activated by reperfusion therapy may also
worsen the stroke outcome. In the present review, we briefly summarize the role of MMPs in the
ischemic stroke with particular consideration of the cardioembolic stroke and its complications.
Moreover, we discuss the genetic background, regulation pathways, clinical risk factors and impact
of MMPs on the clinical outcome
Геология и геодинамика Карсакпай-Улытауской зоны геосутур и ее перспективы на полезные ископаемые
Development of an Enzyme-Linked Immunosorbent Assay (ELISA) for the Quantification of ARID1A in Tissue Lysates
ARID1A is a subunit of the mammalian SWI/SNF complex, which is thought to regulate
gene expression through restructuring chromatin structures. Its gene ARID1A is frequently mutated
and ARID1A levels are lowered in several human cancers, especially gynecologic ones. A functional
ARID1A loss may have prognostic or predictive value in terms of therapeutic strategies but has not
been proposed based on a quantitative method. Hardly any literature is available on ARID1A levels in
tumor samples. We developed an indirect enzyme-linked immunosorbent assay (ELISA) for ARID1A
based on the current EMA and FDA criteria. We demonstrated that our ELISA provides the objective,
accurate, and precise quantification of ARID1A concentrations in recombinant protein solutions, cell
culture standards, and tissue lysates of tumors. A standard curve analysis yielded a ‘goodness of
fit’ of R2 = 0.99. Standards measured on several plates and days achieved an inter-assay accuracy of
90.26% and an inter-assay precision with a coefficient of variation of 4.53%. When tumor lysates were
prepared and measured multiple times, our method had an inter-assay precision with a coefficient of
variation of 11.78%. We believe that our suggested method ensures a high reproducibility and can
be used for a high sample throughput to determine the ARID1A concentration in different tumor
entities. The application of our ELISA on various tumor and control tissues will allow us to explore
whether quantitative ARID1A measurements in tumor samples are of predictive value
Анализ методов ограничения водопритоков на месторождениях Западной Сибири
Объектом исследования являются добывающие скважины, на которых применяются технологии по ограничению водопритоков. Цель работы - оценить эффективность методов ограничения водопритоков на нефтяных месторождениях Западной Сибири.The object of the study are producing wells, which use technologies to limit water inflows. The aim of the work is to evaluate the effectiveness of methods for limiting water inflows in oil fields in Western Siberia
CK2 Activity Mediates the Aggressive Molecular Signature of Glioblastoma Multiforme by Inducing Nerve/Glial Antigen (NG)2 Expression
Nerve/glial antigen (NG)2 expression crucially determines the aggressiveness of glioblastoma multiforme (GBM). Recent evidence suggests that protein kinase CK2 regulates NG2 expression.
Therefore, we investigated in the present study whether CK2 inhibition suppresses proliferation
and migration of NG2-positive GBM cells. For this purpose, CK2 activity was suppressed in the
NG2-positive cell lines A1207 and U87 by the pharmacological inhibitor CX-4945 and CRISPR/Cas9-
mediated knockout of CK2α. As shown by quantitative real-time PCR, luciferase-reporter assays,
flow cytometry and western blot, this significantly reduced NG2 gene and protein expression when
compared to vehicle-treated and wild type controls. In addition, CK2 inhibition markedly reduced
NG2-dependent A1207 and U87 cell proliferation and migration. The Cancer Genome Atlas (TCGA)-
based data further revealed not only a high expression of both NG2 and CK2 in GBM but also
a positive correlation between the mRNA expression of the two proteins. Finally, we verified a
decreased NG2 expression after CX-4945 treatment in patient-derived GBM cells. These findings
indicate that the inhibition of CK2 represents a promising approach to suppress the aggressive
molecular signature of NG2-positive GBM cells. Therefore, CX-4945 may be a suitable drug for the
future treatment of NG2-positive GBM
Переработка отходов лесной промышленности Томской области методом гранулирования
Дипломная работа посвящена обзору отходов лесной промышленности и способам их переработки. Проведен обзор методов переработки отходов лесной промышленности. Приведена разработка технологии производства топливных гранул на примере предприятия ООО "СибирьТомЛес".The graduate work is devoted to the review of forest industry wastes and ways of their processing. The review of methods of processing of wastes of forest industry is carried out. The development of technology for the production of fuel pellets is exemplified by the example of the enterprise LLC "SibirTomLes"