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Design and Implementation of PoC XDMS
PoC XDMS的设计与实现

赵鑫,王纯,李陆,廖建新
计算机系统应用 , 2008,
Abstract: PoC(Push-To-Talk over Cellular,无线一键通)业务系统中的PoC XDMS(XML Document Management Server,XML文档管理服务器)的主要功能是为PoC业务提供群组管理和访问策略管理的能力。依据OMA(Open Mobile Alliance,开放移动联盟)的相关规范,分析了PoC XDMS的需求,给出了一种PoC XDMS服务器设计方案,并加以实现。
Photochemical Production and Behavior of Hydroperoxyacids in Heterotrophic Bacteria Attached to Senescent Phytoplanktonic Cells  [PDF]
Morgan Petit,Richard Sempéré,Frédéric Vaultier,Jean-Fran?ois Rontani
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms140611795
Abstract: The photooxidation of cellular monounsaturated fatty acids was investigated in senescent phytoplanktonic cells ( Emiliania huxleyi) and in their attached bacteria under laboratory controlled conditions. Our results indicated that UV-visible irradiation of phytodetritus induced the photooxidation of oleic (produced by phytoplankton and bacteria) and cis-vaccenic (specifically produced by bacteria) acids. These experiments confirmed the involvement of a substantial singlet oxygen transfer from senescent phytoplanktonic cells to attached bacteria, and revealed a significant correlation between the concentration of chlorophyll, a photosensitizer, in the phytodetritus and the photodegradation state of bacteria. Hydroperoxyacids (fatty acid photoproducts) appeared to be quickly degraded to ketoacids and hydroxyacids in bacteria and in phytoplanktonic cells. This degradation involves homolytic cleavage (most likely induced by UV and/or transition metal ions) and peroxygenase activity (yielding epoxy acids).
POC Content in Size-Fractioned TSS and Transportation Character in The Yellow River
黄河不同粒径悬浮物中POC含量及输运特征研究

ZHANG Long-jun,XU Xue-mei,HE Hui-jun,
张龙军
,徐雪梅,何会军

环境科学 , 2009,
Abstract: Relationship between grain size of total suspended solids(TSS)and particulate organic carbon(POC)content is the base of studying POC transportation and flux in river.Based on sedimentation classification,POC in size-fractioned TSS of The Yellow River was studied by multiple linear regression.The results indicate that:with the median diameter increasing,POC is decreased in a logarithm tendency,the maximum is 0.56% lower than the other rivers;POC is different in the same size-fractioned TSS between characteri...
poc中发言权控制机制的分布式改进  [PDF]
刘海鹏,廖建新,朱晓民
通信学报 , 2012,
Abstract: ?tbcp(talkburstcontrolprotocol)是oma(openmobilealliance)为poc(pushtotalkovercellular)系统定义的集中式发言权控制机制,具有单点控制瓶颈等固有缺陷。而在现有的分布式发言权控制机制中,并没有一种机制能够很好地被应用于poc系统。对tbcp进行了改进并提出了2种分布式发言权控制机制:tbcp/dq(distributedqueue)和tbcp/mq(mobilequeue)。通过分析和仿真,验证了2种新机制能够很好地满足poc业务的需求,甚至可以推广到所有cma(collaborativemultimediaapplications)业务当中。
Limnological characteristics and seasonal changes in density and diversity of the phytoplanktonic community at the Ca?ó pond, Maranh?o State, Brazil
Dellamano-Oliveira, Maria José;Senna, Pedro Américo Cabral;Taniguchi, Glória Massae;
Brazilian Archives of Biology and Technology , 2003, DOI: 10.1590/S1516-89132003000400019
Abstract: seasonal changes of the phytoplanktonic community and limnological abiotic characteristics of ca?ó pond (maranh?o state, brazil) was evaluated from two field researches during the rainy (april 1999) and dry (november 1999) seasons. measurements of twelve chemical and physical variables and phytoplankton collections were carried out at eight sampling stations. the chlorophyceae and cyanobacteria groups were in highest fractions during the rainy and dry seasons, respectively. the limnological abiotic variables showed a homogenous spatial distribution. the cluster analysis, using bray-curtis distance, distinguished two major groups, represented by the most common and abundant species in both the periods. the results showed that the climate regime, due to the seasonal changes in pluviosity, was a determinant over the phytoplanktonic community structure at ca?ó pond.
Limnological characteristics and seasonal changes in density and diversity of the phytoplanktonic community at the Ca ó pond, Maranh o State, Brazil  [cached]
Dellamano-Oliveira Maria José,Senna Pedro Américo Cabral,Taniguchi Glória Massae
Brazilian Archives of Biology and Technology , 2003,
Abstract: Seasonal changes of the phytoplanktonic community and limnological abiotic characteristics of Ca ó pond (Maranh o State, Brazil) was evaluated from two field researches during the rainy (April 1999) and dry (November 1999) seasons. Measurements of twelve chemical and physical variables and phytoplankton collections were carried out at eight sampling stations. The Chlorophyceae and Cyanobacteria groups were in highest fractions during the rainy and dry seasons, respectively. The limnological abiotic variables showed a homogenous spatial distribution. The cluster analysis, using Bray-Curtis distance, distinguished two major groups, represented by the most common and abundant species in both the periods. The results showed that the climate regime, due to the seasonal changes in pluviosity, was a determinant over the phytoplanktonic community structure at Ca ó pond.
辽东湾海域海水DOC,POC及间隙水中的DOC分布特征  [PDF]
马士德,谢肖勃,朱素兰
海洋科学 , 1995,
Abstract: 1988年7月对辽东湾海水中的DD,POC及间隙水中的DD进行了调查,绘制了该海域的DOC,POC及间隙水中的DOC分布图,初步得出该海域的DOC,POC的分布特征。结果表明,海水中的DOC,POC及间隙水中的DOC远比远海和大洋高。
小浪底水库水沙调控影响下的黄河POC输送特征研究  [PDF]
张永领,张东,毛宇翔
环境科学学报 , 2015,
Abstract: 于2011年11月—2012年10月在黄河小浪底站和花园口站进行连续采样观测并结合同期水文资料,研究了在小浪底水库水沙调控影响下黄河颗粒有机碳(POC)的输送规律.结果表明,在小浪底水库正常调度期间,小浪底站和花园口站POC含量分别为0.37~0.65mg·L-1和1.88~6.47mg·L-1,小浪底站POC含量明显低于同期的花园口站.在小浪底水库调水调沙期间,小浪底站和花园口站的POC含量分别为0.43~693.75mg·L-1和6.97~210.65mg·L-1,在水库泄水阶段小浪底站POC含量明显低于花园口站,而在水库排沙阶段小浪底站POC含量又明显高于花园口站.小浪底站和花园口站全年POC输送量分别为53.2万t和49.2万t,其中,7—8月POC输送量最多,小浪底站7—8月POC输送量占全年POC输送量的97.5%,花园口站7—8月POC输送量占全年POC输送量的78.2%.小浪底水库"水沙调控"对黄河POC输送的影响明显不同于其他河流上的水库,它不仅拦蓄上游输送的POC,而在特定时间又将拦蓄水库中的POC大量排出水库.
A Highly Conserved Poc1 Protein Characterized in Embryos of the Hydrozoan Clytia hemisphaerica: Localization and Functional Studies  [PDF]
Cécile Fourrage,Sandra Chevalier,Evelyn Houliston
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0013994
Abstract: Poc1 (Protein of Centriole 1) proteins are highly conserved WD40 domain-containing centriole components, well characterized in the alga Chlamydomonas, the ciliated protazoan Tetrahymena, the insect Drosophila and in vertebrate cells including Xenopus and zebrafish embryos. Functions and localizations related to the centriole and ciliary axoneme have been demonstrated for Poc1 in a range of species. The vertebrate Poc1 protein has also been reported to show an additional association with mitochondria, including enrichment in the specialized “germ plasm” region of Xenopus oocytes. We have identified and characterized a highly conserved Poc1 protein in the cnidarian Clytia hemisphaerica. Clytia Poc1 mRNA was found to be strongly expressed in eggs and early embryos, showing a punctate perinuclear localization in young oocytes. Fluorescence-tagged Poc1 proteins expressed in developing embryos showed strong localization to centrioles, including basal bodies. Anti-human Poc1 antibodies decorated mitochondria in Clytia, as reported in human cells, but failed to recognise endogenous or fluorescent-tagged Clytia Poc1. Injection of specific morpholino oligonucleotides into Clytia eggs prior to fertilization to repress Poc1 mRNA translation interfered with cell division from the blastula stage, likely corresponding to when neosynthesis normally takes over from maternally supplied protein. Cell cycle lengthening and arrest were observed, phenotypes consistent with an impaired centriolar biogenesis or function. The specificity of the defects could be demonstrated by injection of synthetic Poc1 mRNA, which restored normal development. We conclude that in Clytia embryos, Poc1 has an essentially centriolar localization and function.
Numerical modelling of POC yearly dynamics in the southern Baltic under variable scenarios of nutrients, light and temperature  [PDF]
L. Dzierzbicka-Glowacka,K. Kuliński,A. Maciejewska,J. Jakacki
Ocean Science Discussions (OSD) , 2011, DOI: 10.5194/osd-8-675-2011
Abstract: This paper presents various scenarios of the particulate organic carbon (POC) in the southern Baltic Sea. The study is based on a one-dimensional Particulate Organic Carbon model (1-D POC). Mathematically, the pelagic variables of 1-D POC model are described by a second-order partial differential equations of the diffusion type with biogeochemical sources and sinks. The POC concentration is determined as the sum of phytoplankton, zooplankton and dead organic matter (detritus) concentrations. The temporal changes in the phytoplankton biomass are caused by primary production, mortality, grazing by zooplankton and sinking. The zooplankton biomass is affected by ingestion, excretion, faecal production, mortality, and carnivorous grazing. The changes in the pelagic detritus concentration are determined by input of: dead phytoplankton and zooplankton, natural mortality of predators, faecal pellets, and sinks: sedimentation, zooplankton grazing and biochemical decomposition. The 1-D POC model was used to simulate temporal dynamics of POC in the southern Baltic Sea (Gdansk Deep, Bornholm Deep and Gotland Deep) under scenarios characterized by different temperature, nutrients and light. Daily, monthly, seasonal and annual variabilities of POC in the upper water layer are presented for the different scenarios. The starting-point of the numerical simulations was assumed as average values of the investigated pelagic variables for 1965–1998 period. Two- to three-fold increases of POC concentrations in late spring were revealed as well as the shift towards postponed maximum POC concentration. It is speculated that, due to POC increase, oxygenation of under-halocline water layer will decrease, while supply of food to organisms from higher trophic level should increase.
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