oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 2 )

2017 ( 561 )

2016 ( 948 )

2015 ( 13706 )

自定义范围…

匹配条件: “Yelena M. Gambarova” ,找到相关结果约399902条。
列表显示的所有文章,均可免费获取
第1页/共399902条
每页显示
Remote Sensing and GIS as an Advance Space Technologies for Rare Vegetation Monitoring in Gobustan State National Park, Azerbaijan  [PDF]
Yelena M. Gambarova, Adil Y. Gambarov, Rustam B. Rustamov, Maral H. Zeynalova
Journal of Geographic Information System (JGIS) , 2010, DOI: 10.4236/jgis.2010.22014
Abstract: This paper describes remote sensing methodologies for monitoring rare vegetation with special emphasis on the Image Statistic Analysis for set of training samples and classification. At first 5 types of Rare Vegetation communities were defined and the Initial classification scheme was designed on that base. After preliminary Statistic Analysis for training samples, a modification algorithm of the classification scheme was defined: one led us to creating a 4 class’s scheme (Final classification scheme). The different methods analysis such as signature statistics, signature separability and scatter plots are used. According to the results, the average separability (Transformed Divergence) is 1951.14, minimum is 1732.44 and maximum is 2000 which shows an acceptable level of accuracy. Contingency Matrix computed on the results of the training on Final classi- fication scheme achieves better results, in terms of overall accuracy, than the training on Initial classification scheme.
Methods of Attributive Sampling Research in Audit Методика атрибутивного выборочного исследования в аудите
Andrenko Yelena A.,Mordovtsev Sergey M.
Business Inform , 2013,
Abstract: The article substantiates a necessity to apply statistical approach to formation of auditing sampling. It draws a conclusion about a necessity to regularly conduct, within the framework of internal audit, an attributive sample examination of documents even in the event of complete automation of documents circulation and accounting in a company. The proposed technique allows identification of the volume of sampling and upper limit of accuracy with the use of statistical methods of assessment of the universal set of documents. Обоснована необходимость применения статистического подхода к формированию аудиторской выборки. Сделан вывод о необходимости, в рамках внутреннего аудита, регулярно проводить атрибутивную выборочную проверку документов даже при условии полной автоматизации документооборота и учета на предприятии. Представленная методика позволяет определить объем выборки и верхний предел точности с использованием статистических методов оценивания генеральной совокупности документов.
The Diversity of Chrysophycean Algae in an Arctic Zone of River and Sea Water Mixing, Russia  [PDF]
Alena D. Firsova, Anna Yu Bessudova, Larisa M. Sorokovikova, Irina V. Tomberg, Yelena V. Likhoshway
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.615246
Abstract: According to the results of studies in the region of lower Yenisei River to the Kara Sea shelf in September 2009, the flora of chrysophyte algae in the zone of river and sea water mixing comprises 43 species of the classes Chrysophyceae and Synurophyceae. Most of them are cosmopolitan and widespread, but four rare species have also been recorded. The most frequent species are Synura petersenii f. petersenii, S. petersenii f. kufferathii, Spiniferomonas takahashii, Mallomonas acaroides, and M. crassisquama. The composition of chrysophyte flora in the study region is similar to that in some lakes of the Taimyr Peninsula. It has been found that the diversity of chrysophytes in the zone of river and sea water mixing depends on water salinity, with a group of species occurring at increased salinity levels. It includes Chrysosphaerella coronacircumspina (5.2‰), Kephyrion spirale (5.2‰) and Mallomonas crassisquama (8‰). These data contribute to knowledge of how the distribution of chrysophytes responds to changes in ecological conditions such as water salinity, turbidity, pH, and concentrations of oxygen and mineral phosphorus.
Recovery of nigrostriatal dopaminergic system insufficiency by allotransplantation of embryonic brain tissue  [PDF]
Olga Berchenko, Yelena Usmentseva
World Journal of Neuroscience (WJNS) , 2013, DOI: 10.4236/wjns.2013.34032
Abstract:

In an experiment in rats with electrolytic lesion of the compact part of substantia nigra (SN) and after allotransplantation of the embryonic tissue of SN in the caudate nucleus the features of movement and emotional behavior in the Open Field Test (OFT), the rotation movements caused by an administration of amphetamine, a content of catecholamines in the caudate nucleus, hypothalamus and blood plasma have been investigated. It is shown that the electrolytic lesion causes violations of the statokinetic reflexes, the horizontal and the vertical movement activity, enhances the rotatory behavior, slow the orienttate-searching and the emotional reactions that combined with disbalance in dopamine-and noradrenalinetransmitter systems functioning. Allotransplantation of the embryonic dofaminsynthesizing brain tissue contributes to the restoration of movement activeity and its specific neurotransmitter ensuring. 

Innovative Component of Modern Higher Education in the Republic of Kazakhstan  [PDF]
Nazym Stamgaliyeva, Yelena Feoktistova
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.210006
Abstract: The paper considers modern conditions of education development in the Republic of Kazakhstan. Modern higher education in Kazakhstan is based mainly on the results of innovations as a science of innovations. The bases of the work of higher education institutions in Republic of Kazakhstan lie in the following strategic acts: Program of Enforced Industrial and Innovative Development of Kazakhstan, State Program of Education Development in Kazakhstan for 2011-2020. High schools have to form the whole system of universal knowledge, habits and skills, also self-activities and personal responsibilities of students that are key competencies, determining modern quality of education. It is necessary to introduce structural, institutional, organizational and economic changes in the system of higher education and as a result make new content of education, and design it in accordance with requirements of time and with the tasks of developing country. That is why today the realization of competence approach needs the support on international experience, by the necessary adaptation to traditions and demands of Kazakhstan.
Anti-viral activity of red microalgal polysaccharides against retroviruses
Marina M Talyshinsky, Yelena Y Souprun, Mahmoud M Huleihel
Cancer Cell International , 2002, DOI: 10.1186/1475-2867-2-8
Abstract: Retroviruses [1-3] – viruses that contain reverse transcriptase, an RNA-directed DNA polymerase [4,5] – have been implicated in various types of human and animal leukemia's and other tumors. Although there are many compounds that exhibit potent anti-viral, and possibly anti-tumor, activity in cell culture and in experimental animals, only very few synthetic compounds and one natural product – alpha interferon – have so far been approved for treatment of viral infections in man. Alpha interferon has been approved for treatment of hairy cell leukemia, of Karposi's sarcoma and of genital warts caused by papiloma virus [6].A class of natural products with low mammalian toxicity that are currently regarded as having antitumor activity are polysaccharides of biological origin, e.g., polysaccharides from yeasts, algae, bacteria, higher plants and fungi [7-9]. Of interest in this context are polysaccharides produced by some species of red algae; these compounds have shown promising activity against a variety of animal viruses [10-13]. In general, polysaccharides exhibiting antiviral potential are highly sulfated [10,14-17]. Dextran sulfate and polysaccharides from marine algae, for example, have been found to be potent in vitro inhibitors of HIV types 1 and 2 [15,18-20]. They inhibit HIV-1-induced cytopathogenicity and HIV-1 antigen expression [13,18,21,22]. These sulfated polysaccharides also inhibit the activity of purified reverse transcriptase and RNase H, which are essential for retrovirus replication [18,20]. Some previous studies showed that algal polysaccharides exert their inhibitory action at a very early stage (adsorption, fusion or penetration), in the viral infection cycle [9,18,20,23-25], whereas others showed that these polysaccharides did not interfere with virus attachment or penetration, but they did prevent viral protein synthesis [11,26,27].Our previous research has shown potent antiviral activity of a highly sulfated polysaccharide extracted from red mi
Di-tert-butyl N-[2,6-bis(methoxymethoxy)phenyl]iminodiacetate
Ben Capuano,Ian T. Crosby,Craig M. Forsyth,Yelena Khakham
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809009246
Abstract: The title molecule, C20H31NO8, has pseudo-C2 symmetry about the C—N bond, with the bis(tert-butoxycarbonyl)amino group twisted from the benzene ring plane by ca 60° and the bulky tert-butoxycarbonyl (Boc) groups are orientated away from the substituted aniline group. As part of an antibacterial drug discovery programme furnishing analogues of platensimycin, we unexpectedly synthesized the bis-Boc-protected aniline.
Optimizing Frozen Sample Preparation for Laser Microdissection: Assessment of CryoJane Tape-Transfer System?
Yelena G. Golubeva, Roberta M. Smith, Lawrence R. Sternberg
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0066854
Abstract: Laser microdissection is an invaluable tool in medical research that facilitates collecting specific cell populations for molecular analysis. Diversity of research targets (e.g., cancerous and precancerous lesions in clinical and animal research, cell pellets, rodent embryos, etc.) and varied scientific objectives, however, present challenges toward establishing standard laser microdissection protocols. Sample preparation is crucial for quality RNA, DNA and protein retrieval, where it often determines the feasibility of a laser microdissection project. The majority of microdissection studies in clinical and animal model research are conducted on frozen tissues containing native nucleic acids, unmodified by fixation. However, the variable morphological quality of frozen sections from tissues containing fat, collagen or delicate cell structures can limit or prevent successful harvest of the desired cell population via laser dissection. The CryoJane Tape-Transfer System?, a commercial device that improves cryosectioning outcomes on glass slides has been reported superior for slide preparation and isolation of high quality osteocyte RNA (frozen bone) during laser dissection. Considering the reported advantages of CryoJane for laser dissection on glass slides, we asked whether the system could also work with the plastic membrane slides used by UV laser based microdissection instruments, as these are better suited for collection of larger target areas. In an attempt to optimize laser microdissection slide preparation for tissues of different RNA stability and cryosectioning difficulty, we evaluated the CryoJane system for use with both glass (laser capture microdissection) and membrane (laser cutting microdissection) slides. We have established a sample preparation protocol for glass and membrane slides including manual coating of membrane slides with CryoJane solutions, cryosectioning, slide staining and dissection procedure, lysis and RNA extraction that facilitated efficient dissection and high quality RNA retrieval from CryoJane preparations. CryoJane technology therefore has the potential to facilitate standardization of laser microdissection slide preparation from frozen tissues.
Distribution of Industrial Farms in the United States and Socioeconomic, Health, and Environmental Characteristics of Counties
S. M. Rafael Harun,Yelena Ogneva-Himmelberger
Geography Journal , 2013, DOI: 10.1155/2013/385893
Abstract: The method of producing food animals has changed in the United States over the past century, moving from traditional burns to enclosed structures resembling industrial buildings, where animals are raised in high stocking density (commonly known as “Concentrated Animal Feeding Operations,” CAFOs). The objective to maximize profit has resulted in poor farm management; raised issues of environmental pollution, public health, animal rights, and environmental justice, and had socio-economic impacts. Studies concerning the issues are limited to specific regions and types of CAFOs. In addition, studies on the spatial distribution and temporal changes of CAFO at a country scale are lacking. This study bridges some of the gaps by analyzing the spatial distribution of industrial farms in the United States in 2002 and 2007 and their relationship with vulnerable population and exploring the relationships among the concentrations of farms, socio-economic, health, and environmental characteristics of the counties. A range of spatial statistics tools were applied in this study. The study revealed variations in spatial distribution depending on the type of the CAFOs. The issue of environmental justice was found prevalent depending on the types of industrial farms. Each type of industrial farm was found to interact uniquely with the selected demographic, health, and environmental parameters. 1. Introduction American agriculture has shifted from traditional small family farms to large agricultural industry over the past century to keep up with the increase in meat demand and objective of maximizing profit by minimizing the costs of producing food animals. These kinds of farming facilities are known as Concentrated Animal Feeding Operations (CAFO) and also regarded as industrial farms or factory farms. In the industrial farms, the animals are raised in high stocking density, and antibiotics and pesticides are used to mitigate the spread of disease and pestilence exacerbated by these crowded living conditions [1]. CAFO encompass all aspects of breeding, feeding, raising, and processing animals or their products for human consumption [2]. Industrial farming practice is a product of the postindustrial revolution era and began to grow in the 1920s soon after the discovery of vitamins A and D; by adding the vitamins to feed, animals no longer required exercise and sunlight for growth [3]. This advancement in agricultural practice has increased efficiency in agricultural production. In the eighteenth century, it took nearly five acres of land to feed one person, whereas due to
Time as a Category of Traditional Besermian Worldview
Yelena Popova
Folklore : Electronic Journal of Folklore , 2006,
Abstract: The traditional chronology of Besermians is a constantly developing and transforming system subject to various internal and external influences. As a part of a culture’s worldview, time determines the rhythm of nature, lore culture, economic activities, and cycles of human life. A day covers the period from sunrise to sunset, a night the period from sunset to sunrise. Each part of the day was given a name. Midnight and noon were considered dangerous and special times. Weekdays were seen as positive (easy) or negative (difficult). The positive or negative nature of the day may have influenced the outcome of the work undertaken. The yearly system was based on the change of seasons. The change of seasons had a significant influence on the entire economic life, which, in turn, determined the community life, including family and practical rituals. Until the adoption of mechanical clocks, time has been calculated with various means at people’s disposal. Observing the movement of the sun and the moon has been important. The Besermians havemerged several traditional feast days, the tradition of commemorating the dead and other festivities with the Orthodox church calendar.
第1页/共399902条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.