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Search Results: 1 - 10 of 293875 matches for " 李海拉 "
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三硝基间苯二酚逐级酸度常数的测定
徐铭熙,
重庆大学学报 , 1994,
Abstract: 通过滴定曲线分析和相应的数据处理,用电位滴定法准确地测定了2,4,6-三硝基-1,3-二羟基苯的逐级酸度常数,用同样的方法测定草酸的Kα1和Kα2,测值与文献值完全一致,证明了测定结果的可靠性。
钒钛高炉渣中金属铁的物相分析碘—乙醇分离分光光度法测定
雷清如,朱育胜,
重庆大学学报 , 1986,
Abstract: 本文研究了钒钛高炉渣中金属铁的测定方法。认为可以采用碘——乙醇法。碘——乙醇与金属铁的反应具选择性,可避免渣中大量低价钛化合物的干扰。无毒,且对五官无刺激作用。分析结果与碘——甲醇法的极为相近。方法简便迅速,适于日常分析之用。
钒钛高炉渣中金属铁的分析方法研究(碘-乙醇分离,EDTA法测定)
雷清如,杨雋,
重庆大学学报 , 1988,
Abstract: 以溴-甲醇浸溶,重铬酸钾法测定金属铁的准确度很高。但由于此法中要用到Br_2,CH_3OH,HgCl_2,K_2Cr_2O_7等对人体有害的试剂,本文采用I_2-C_2H_5OH浸溶,EDTA法测定,避免了使用以上有害物质。本方法简单,重现性好,终点易于观察,适用于钒钛高炉渣,高钛渣和普通炉渣中金属铁的测定。
基于条件随机场的蒙古语词性标注方法
应玉龙,,乌达巴,
计算机应用 , 2010,
Abstract: ?为了保留蒙古语词缀中大量的语法、语义信息和缩小蒙古语词典的规模,蒙古语词性标注需要对词干和词缀都进行词性标注。针对这一问题提出了一种基于条件随机场(crf)的蒙古语词性标注方法。该方法利用crf模型能够添加任意特征的特点,充分使用蒙文上下文信息,针对词素之间的相互影响添加了新的统计特征,并在3.8万句的蒙古语词性标注语料上进行了封闭测试,该方法的标注准确率达到了96.65%,优于使用隐马尔可夫模型(hmm)的词性标注模型。
昭苏县马匹常见寄生虫感染现状及其驱虫药物选用
The Status of Horses Infected by Common Parasites and the Selection of Insect Repellent in Zhaosu County
 [PDF]

提·吾木尔别克, , 索意利·, 明·乌尔娜, 瓦热斯·吐尔松, 巴音查汗
Asian Case Reports in Veterinary Medicine (ACRPVM) , 2015, DOI: 10.12677/ACRPVM.2015.42003
Abstract:
由于昭苏县马匹常见寄生虫虫种较多、感染强度大且常伴随混合感染,长期普遍流行导致病情呈上升趋势对马匹造成不同程度的危害。常见的马寄生虫包括体内消化道线虫(马副蛔虫、马圆形线虫等)、体外寄生虫(马胃蝇、蜱虫)及血液原虫病(马梨形虫病)。本文通过对以上常见寄生虫的鉴别点、分布流行特性、致病作用、及其针对性驱虫药物进行归纳叙述,为昭苏县马匹常见寄生虫病的正确诊断、疫情动态的及时掌握及综合防治地方马寄生虫病奠定基础。
Due to parasites being found most commonly, the much stronger intensity of the infection and often with mixed infection in Zhaosu horses, and long-term popularity causing the disease’s increasing trend, harms of different levels appeared. Common horse parasites include gastrointestinal nematodes in the body (Parascaris equorum, Strongylus), ectoparasites (Gasterophilus, ticks) and blood protozoal disease (Piroplasma). In this paper, we have reviewed the common parasites’ identification points, popular features of distribution, pathogenic role, and its specific insect repellent. This investigation lays the foundation of accurate diagnosis of common parasitic diseases, mastering of epidemic dynamic in time and the prevention and control of parasitic diseases for Zhaosu horses.
Morphological studies and 18S rDNA sequence analysis of the marine scuticociliate Parauronema cf. virginianum (Protozoa, Ciliophora) isolated from Scophthalmus maximus
寄生养殖大菱鲆的海洋盾纤类纤毛虫(弗州拟尾丝虫相似种)的形态学和18S rDNA 序列分析

,天保,,盖春蕾,朱安成,张 伟
海洋科学 , 2011,
Abstract: A parasitic ciliate isolated from the cultured flatfish Scophthalmus maximus was analyzed in the present paper. Morphological investigations were performed using living observation and silver carbonate staining method. The data of the body shape, size, structure of buccal apparatus, macro- and micronucleus, as well as the somatic ciliature showed that the parasitic ciliate was similar to Parauronema virginianum. The molecular phylogenetic characters were analyzed to further determine the classification of the parasitic ciliate. The 18S rDNA of the ciliate was sequenced (GenBank accession number is FJ595488), and it only had 8 different bases compared with those of P. virginianum. They shared 99% similarity insequence. The 18S rDNA of the ciliate was also compared with those of 14 related ciliates. Phylogenetic dendrogram was constructed based on the genetic distance analysis, which revealed that this organism and P. virginianum clustered into one branch, with their genetic distance of 0.005. Based on the obtained results, the isolated ciliate was identified as a Parauronema-similar taxon, that is, P. cf. virginianum.
钢中第二相的分离和固溶钒的测定
徐铭熙,,程保国,耿连如,崔永娟
重庆大学学报 , 1990,
Abstract: 本文研究了合金钢中基体铁及固溶钒的溶出条件和第二相钒化物的收集方法,同时探讨了钢中弥散相钒化物存在的可能性,为第二相中钒化物的富集及电化学分离提供了条件,固溶钒测定的结果是十分可靠的。
寄生养殖大菱鲆的海洋盾纤类纤毛虫(弗州拟尾丝虫相似种)的形态学和18S rDNA 序列分析
,天保,,盖春蕾,朱安成,张伟
海洋科学 , 2011,
Abstract: 从养殖大菱鲆(Scophthalmusmaximus)患病鱼体中分离出一种寄生纤毛虫,通过活体观察、碳酸银法染色对其形态学特征进行分析,初步鉴定为弗州拟尾丝虫相似种(Parauronemacf.virginianumThompson,1967)。同时对其18SrDNA序列进行了测定和分子系统发育学分析,结果显示该纤毛虫序列与弗州拟尾丝虫(Parauronemavirginianum)存在8个碱基的差异,序列相似性为99%,表明二者的高度相似性。在对本纤毛虫的18SrDNA序列和GenBank中报道的14种相关盾纤类纤毛虫相应序列相似性和进化距离分析的基础上,作者构建了包括迄今所有相关、已知种类的系统进化树。本研究为海水鱼类相关病害的病原鉴定提供了一份新的数据和资讯。
Ce~(3+):LiYF_4和Ce~(3+):LiLuF_4晶体生长与其紫外光谱特征
那木吉,苏小平,,阮永丰,杨鹏,
硅酸盐学报 , 2009,
Abstract: 采用提拉法在CF4气氛中生长高质量掺Ce3+的LiYF4和LiLuF4晶体。测试了晶体的紫外光谱,并从配位场理论角度解释了Ce3+在2种氟化物晶体中紫外光谱特性的差异。结果表明Ce3+在LiYF4晶体的吸收谱宽度比在LiLuF4晶体中更宽,Ce3+LiYF4晶体的吸收峰和荧光峰的位置相对Ce3+LiLuF4晶体的出现紫移。认为其主要原因是由于在LiYF4晶体中,Ce3+和相邻的F-的距离更近,Ce3+的d电子与F-之间的相互排斥作用更大。
冀西北地区铜地球化学块体特征及资源潜力预测
文龙,庞保成,蓝妮,
黄金科学技术 , 2013,
Abstract: 以冀西北地区1∶20万化探扫面资料为基础,应用地球化学块体理论与方法,对研究区内铜的地球化学块体特征和铜矿产资源特征进行了系统分析。共圈出3个规模不等的铜地球化学块体和3处地球化学异常,重点分析研究程度较高的3号铜地球化学块体,通过结合遥感线、环构造特征和区域蚀变遥感异常带对3号铜化学矿体进行耦合验证,优选找矿地球化学块体,认为3号铜化学矿体内涞源县湖海铜地球化学异常区具有进一步找矿潜力。
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