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关于痢疾菌苗的研究现状(续)

微生物学免疫学译刊 1986年第3期 72-76页

作者： Formal s b 骆非

下面讨论志贺氏菌质粒的基因产物。这是Hale的初步工作及志贺氏菌毒株与侵袭性大肠杆菌微细胞的初步应用。由于会出现分裂不完善的突变体,致使其细胞的一部分分裂后不能遗传染色体DNA,细胞发芽部分太小不能包含染色体,只能包含大质粒。... 详细信息

下面讨论志贺氏菌质粒的基因产物。这是Hale的初步工作及志贺氏菌毒株与侵袭性大肠杆菌微细胞的初步应用。由于会出现分裂不完善的突变体,致使其细胞的一部分分裂后不能遗传染色体DNA,细胞发芽部分太小不能包含染色体,只能包含大质粒。微细胞可以从营养细胞中分离到,在这些种群中从新合成蛋白质的是由质粒而不是染色体DNA。来自弱毒亲本的微细胞不能侵入

关键词：福氏志贺氏菌染色体质粒基因载体菌苗疫苗抗原接合体杂交株半乳糖己糖保护力试验

Numerical modeling for rockbursts:A state-of-the-art review

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第2期13卷 457-478页

作者： Jun Wang Derek b.Apel Yuanyuan Pu Robert Hall Chong Wei Mohammadali sepehri school of Mining and Petroleum Engineering University of AlbertaEdmontonAlbertaT6G 2R3Canada state Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400044China

As the depth of excavation increases,rockburst becomes one of the most serious geological hazards damaging equipment and facilities and even causing fatalities in mining and civil *** has forced researchers worldwide to identify different methods to investigate rockburst-related ***,some problems,such as the mechanisms and the prediction of rockbursts,continue to be studied because rockburst is a very complicated phenomenon influenced by the uncertainty and complexity in geological conditions,in situ stresses,induced stresses,*** modeling is a widely used method for investigating *** date,great achievements have been made owing to the rapid development of information technology(IT)and computer ***,it is necessary and meaningful to conduct a review of the current state of the studies for rockburst numerical *** this paper,the categories and the origin of different numerical approaches employed in modeling rockbursts are reviewed and the current usage of various numerical modeling approaches is investigated by a literature ***,a state-of-the-art review is implemented to investigate the application of numerical modeling in the mechanism study,and prediction and prevention of *** main achievements and problems are ***,this paper discusses the limitations and the future research of numerical modeling for *** approach is proposed to provide researchers with a systematic and reasonable numerical modeling framework.

关键词： Rockburst Numerical modeling Rockburst mechanism Dynamic modeling

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生态模型在河口管理中的应用研究综述

水科学进展 2015年第5期26卷 739-751页

作者：申霞 b.Larry LI 南京水利科学研究院水文水资源与水利工程科学国家重点实验室江苏南京210029 Ecological Complexity and Modeling Laboratory University of California at Riverside

河口作为河流和海洋的交汇地,具有生态交错带特性,其在自然和人类活动双重压力下发生着演变。生态模型是研究生态系统结构、功能及其时空演变规律以及生物过程对于生态系统的影响及其反馈机制的重要手段。采用不同方法对生态模型进行分... 详细信息

河口作为河流和海洋的交汇地,具有生态交错带特性,其在自然和人类活动双重压力下发生着演变。生态模型是研究生态系统结构、功能及其时空演变规律以及生物过程对于生态系统的影响及其反馈机制的重要手段。采用不同方法对生态模型进行分类,综述各类生态模型的特性、优缺点及应用领域。讨论建模过程中模型变量与函数、模型整合及时空尺度、模型参数取值及不确定等关键技术问题。分析各类生态模型在河口生态工程设计、生态系统修复、生态系统评价、系统决策支持等管理领域的应用。尽管中国河口生态模型构建及应用已有一些成果,但与国外相比,在理论生态学及数据积累方面仍有一定差距。

关键词：河口生态系统生态模型分类时空尺度人类活动海岸带综合管理

Advances in myopia research anatomical findings in highly myopic eyes

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Eye and Vision 2020年第1期7卷 434-443页

作者： Jost b.Jonas Ya Xing Wang Li Dong Yin Guo songhomitra Panda-Jonas Department of Ophthalmology Medical Faculty Mannheim of the Ruprecht-Karis-UniversityUniversitäts-AugenklinikTheodor-Kutzer-Ufer 1-368167 MannheimGermany beijing Ophthalmology and Visual sciences Key Laboratory Beijing Institute of OphthalmologyBeijing Tongren HospitalCapital Medical UniversityBeijingChina beijing Tongren Eye Center Beijing Ophthalmology and Visual Science Key LabBeijing Key Laboratory of Intraocular Tumor Diagnosis and TreatmentBeijing Tongren HospitalCapital Medical UniversityBeijingChina Tongren Eye Care Center Beijing Tongren HospitalCapital Medical UniversityBeijingChina

background:The goal of this review is to summarize structural and anatomical changes associated with high *** text:Axial elongation in myopic eyes is associated with retinal thinning and a reduced density of retinal pigment epithelium(RPE)cells in the equatorial *** of the retina and choriocapillaris and RPE cell density in the macula are independent of axial *** and scleral thickness decrease with longer axial length in the posterior hemisphere of the eye,most marked at the posterior *** any eye region,thickness of bruch’s membrane(bM)is independent of axial *** opening,as the inner layer of the optic nerve head layers,is shifted in temporal direction in moderately elongated eyes(axial lengths to an overhanging of bM into the intrapapillary compartment at the nasal optic disc side,and to an absence of bM at the temporal disc *** lack of bM at the temporal disc side is the histological equivalent of parapapillary gamma *** zone is defined as the parapapillary region without *** highly myopic eyes(axial length>26.5 mm),bM opening enlarges with longer axial *** leads to a circular gamma *** a parallel manner,the peripapillary scleral flange and the lamina cribrosa get longer and thinner with longer axial length in highly myopic *** elongated peripapillary scleral flange forms the equivalent of parapapillary delta zone,and the elongated lamina cribrosa is the equivalent of the myopic secondary *** prevalence of bM defects in the macular region increases with longer axial length in highly myopic *** staphylomas are characterized by marked scleral thinning and spatially correlated bM defects,while thickness and density of the choriocapillaris,RPE and bM do not differ markedly between staphylomatous versus non-staphylomatous eyes in the respective ***:High axial myopia is associated with a thinning of the sclera and choroid posteriorly and thinnin

关键词： High myopia Myopia bruch’s membrane Optic nerve head Optic disc Parapapillary gamma zone Parapapillary delta zone Lamina cribrosa Anatomical changes

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富人的广播穷人听

科技潮 1998年第3期 116-117页

作者： s.b

世界空间计划将通过卫星和数字技术来帮助南方的人民取得"信息的民主化"。"‘世界空间’令人感兴趣的地方在于他们知道怎样推销自己,"法国国际广播电台(RFI)台长阿诺德·利塔尔第充满热情。他的态度和这个计划的创始人诺阿·萨马拉的近... 详细信息

世界空间计划将通过卫星和数字技术来帮助南方的人民取得"信息的民主化"。"‘世界空间’令人感兴趣的地方在于他们知道怎样推销自己,"法国国际广播电台(RFI)台长阿诺德·利塔尔第充满热情。他的态度和这个计划的创始人诺阿·萨马拉的近乎传教士般的热诚和顽强精神如出一辙。"你不可能一口就把一头大象吃掉,"萨马拉开玩笑说。这位41岁的美国穆斯林是苏丹和埃塞俄比亚人的后裔。"你得一点一点地吃。"在过去的7年里,他正是这样不知疲倦地工作着,试图建立起一个依靠环绕地球的卫星来发射信号的数字广播网。这是一项庞大的计划,看起来和他的商业本能以及

关键词：世界空间法国国际广播电台节目穷人富人收音机广播接收机波道广播关元

Phosphorus Fertilizer Rating and Rhizobia Inoculation for Improved Productivity of Cowpea in Northern Uganda

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American Journal of Plant sciences 2020年第9期11卷 1505-1519页

作者： s. M. Nyamaizi J. b. Tumuhairwe R. Amayo C. L. Tumuhe E. Tereka D. L. Nabirye b. b. Obaa Agassiz Research and Development Centre Agriculture and Agri-Food Agassiz BC Canada Faculty of Land and Food systems The University of British Columbia Vancouver BC Canada Department of Agricultural Production College of Agricultural and Environmental Sciences Makerere University Kampala Uganda Department of Crop Production and Management Faculty of Agriculture and Animal Sciences Busitema University Tororo Uganda Department of Environmental Management Makerere University Kampala Uganda African Rural University Kagadi Uganda

Cowpea (Vigna unguiculata) is an important legume crop in the tropics and subtropical regions of the world. It is mainly grown for its leaves and grains, and to a lesser extent as a fodder crop. Cowpea is considered as the most important food grain legume in the dry savannas of tropical Africa. This study compared the yield of local (Agondire) and improved (SECOW 2W) cowpea varieties grown on an Oxisol. Inorganic P at levels of 0, 10, 20, and 40 kg·hasup>-1sup> was tested on each variety with or without rhizobia inoculation. The experiments were set up in a randomized complete block design and replicated thrice during the short and long rains of the 2015/2016 seasons on fifteen fields in Arua district, northern Uganda. Agondire responded significantly (P sup>-1sup>) were applied. A significant increase of 26.4% and 28.4% in grain yield of Agondire and SECOW 2W, respectively was obtained after inoculation with rhizobia. We concluded that inoculation and P fertilizer application increased the yield of both varieties, but with inoculation, SECOW 2W performs much better at lower P fertilizer rates than Agondirespan style="font-family:Verdana;"

关键词： Phosphorus Fertilizer Rhizobia Inoculation Agondire sECOW 2W Yield

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关于痢疾菌苗的研究现状

微生物学免疫学译刊 1986年第2期 69-73页

作者： Formal s b 骆非

(***教授系美国Walter Reed陆军军事医学研究所肠道传染病室主任,应卫生部兰州生物制品研究所邀请,于1985年9月24日至9月26日来本所讲学。现将他的讲稿整理翻译如下。大部分肠道病原体致病必须与肠粘膜建立某种程度的结合。然而,在这... 详细信息

(***教授系美国Walter Reed陆军军事医学研究所肠道传染病室主任,应卫生部兰州生物制品研究所邀请,于1985年9月24日至9月26日来本所讲学。现将他的讲稿整理翻译如下。大部分肠道病原体致病必须与肠粘膜建立某种程度的结合。然而,在这种结合之前,病原体必须首先克服宿主的各种防御机制。这些防御机制包括胃酸度,复盖在肠上

关键词：志贺氏菌属痢疾毒力大肠杆菌贺氏志贺氏杆菌属肠杆菌科脾胃病毒性大肠埃希氏菌埃希氏杆菌属质粒编码产毒株气杆菌素杂交株大质粒毒素毒物正常菌丛菌体抗原

Numerical investigation and potential tunability scheme on e^+e^- and π^+π^- stimulated pair creation from vacuum using high intensity laser beams

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High Power Laser science and Engineering 2016年第4期4卷 1-7页

作者： I.Ploumistakis s.D.Moustaizis I.Tsohantjis Technical University of Crete Laboratory of Matter Structure and Laser Physics National and Kapodistrian University of Athens Faculty of PhysicsDepartment of Nuclear and Particle Physics

Numerical estimates for electrons and mesons particle–antiparticle creation from vacuum in the presence of strong electromagnetic fields are derived, using the complete probability density relation of Popov's imaginary time method(Popov, JETP Lett. 13, 185(1971); sov. Phys. JETP 34, 709(1972); sov. Phys. JETP 35, 659(1972); Popov and Marinov, sov. J. Nucl. Phys. 16, 449(1973); JETP Lett. 18, 255(1974); sov. J. Nucl. Phys. 19, 584(1974));(Popov,Phys. Let. A 298, 83(2002)), and within the framework of an experimental setup like the E144(burke et al., Phys. ***. 79, 1626(1997)). The existence of crossing point among pair creation efficiency curves of different photon energies and the role of odd/even multiphoton orders in the production rates are discussed. Finally a kind of tunability process between the two creation processes is discussed.

关键词： high intensity lasers multiphoton processes pair production

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卡拉第公牛性行为的研究

家畜生态学报 1983年第1期 26-30页

作者： s、b、A阿里伊拉克苏莱曼尼大学农学院

试验用九头土种卡拉第公牛来研究其性行为和精液品质.记录了569次采精的反应时间,肥跨行为及插入强度。第一和第二次采精的平均反应时间为114.6±6.8秒和81.0±6.9秒。大约有90%次采精,公牛表现正常的爬跨行为.首次采精有53.3%,第二次... 详细信息

试验用九头土种卡拉第公牛来研究其性行为和精液品质.记录了569次采精的反应时间,肥跨行为及插入强度。第一和第二次采精的平均反应时间为114.6±6.8秒和81.0±6.9秒。大约有90%次采精,公牛表现正常的爬跨行为.首次采精有53.3%,第二次采精有48.2%其插入动作较强,方差分析表明各公牛的反应时间有显著的差别.而月份及季节的差别不明显.当公牛经用假阴道采精训练后,爬跨行为在不同月份和季节中的差别不大,而各个体公牛的插入强度则显示出明显的差别.结论是,大规模的人工授精计划,只能挑选性欲强的公牛.

关键词：公牛反应时间不同月份采精爬跨行为卡拉性行为