This paper summarizes the history and main symptoms of banana leaf spot disease caused by mycosphaerella spp . ; and also deals with the taxonomy status , biological properties , isolation , detection , and identification of the pathogen 根据国内外近年来香蕉叶斑病的研究概况，对香蕉叶斑病的历史、主要症状、病原菌的分类及生物学特性、病原菌的分离、监测和鉴定技术、病害的流行条件及防治方法进行了综述。
The present method takes about 6 hours to get a flexible membrane with fine appearance . the physical and biological properties of the chitosan / glycerol membrane were also investigated . the result shows that the mechanical properties of blend membranes greatly increased with the increase of glycerol 甘油的加入提高了壳聚糖甘油膜的柔韧性，但甘油为小分子物质，容易从膜中流失，在动物试验中表现出膜硬度增加并出现收缩现象，不利于组织的运动和恢复。
The harms of soil compaction represented briefly as soil bulk density and penetration resistance increased , macroporosity decreased , soil physical , chemical and biological properties deteriorated , which effected on crop growing and soil structure degradation , and has become one of the principal obstacle factors for sustainable development of agriculture 土壤机械压实危害主要表现在土壤容积质量和机械阻力增加，大孔隙减少，土壤物理、化学、生物性状恶化，进而影响作物的生长发育，土壤结构发生退化，已成为当前制约农业可持续发展的障碍因素之一。
The scope of this study is to find an effective method and appropriate additives to prepare chitosan composite membranes with good physical and biological properties . glycerol is a good additive that could make the chitosan composite membranes have good flexibility and keeps the wound dry . in this paper , chitosan / glycerol blend membranes were prepared by the sol - gel transformation method 当甘油含量为8 ，用无水乙醇、甘油和氢氧化钠按一定比例配制成的凝胶混合液在70凝胶2小时制备的壳聚糖甘油膜五色透明、表面光洁、无气泡、手感柔韧性较好，拉伸强度和断裂伸长率最佳，可以满足实际应用需要。
By morphologic examination , structure characteristics ^ biological property n serological tests and pathology characteristic study , this virus was identified as the medium virulence chicken . new castle disease virus ( ndv ) , whose pathology characteristics were appeared different from those of the standard virulence ndv . la sola vaccine could not give good protection against the infection of this virus isolate 用spf鸡胚在吉林省患病鸡群中分离到一株病毒，经病毒形态学、结构特征、生物学、血清学及致病性等试验研究，确定该病毒为鸡新城疫强毒，对lasota免疫鸡的致病性及其致死率与鸡新城疫标准强毒e _ 9f _ ( 48 )对比差异显著， lasota疫苗对该株病毒免疫保护效果不理想。
This study provided the basis for the further research about gpv molecular biological properties and the physical , chemical character and biological activity of vpl . lt was prepared work for the development of diagnostic reagent and genetic engineering vaccine . and it also provided the evidence for taxonomy of gpv and its relationship in evolution 本试验为进一步研究gpv的分子生物学特性， vp1的理化特性、生物学活性奠定了基础：为gpv的诊断试剂、基因工程疫苗的研制做了前期工作：同时为gpv的分类地位及其进化关系提供了佐证。
From dead chicken which infected infectious stunting syndrom of our province , one virue was isolated using spfeggs , chicken embryo fibroblast , mdck18 , and vero cell . this virus was unable to agglutinate chicken erythrocytes . in order to definite the pathogeny of infectious stunting syndrom . physical and chemical specific property , types of the nucleic acid of the isolated virus , recurrent infection and other biological property determination and indirect elisa test proved it as a parvoviruses like strain of chicken 为确定该病的病原，对所分离病毒进行了理化特性测定、病毒核酸型别测定、动物回归试验等生物学特性测定，证明该分离病毒与细小病毒科( parvovirdae )细小病毒属( parvovirus )的鸡细小病毒( chickenparvovirus )特性基本相符，核酸型为dna型。
With increase of artificial forest age , the content of soil organic matter decreased sharply . and soil physical , chemical and biological properties of forest became worsen . from soil physical properties analysis , soil silt , clay , physical clay , aggregate degree and structure coefficient in topsoil increased with increase of artificial forest age and soil sand deceased 在土壤物理性质方面，随着人工云杉林龄的增加，土壤表层粉粒、粘粒、物理性粘粒、团聚度和结构系数降低，砂粒含量增高，土壤饱和持水量、毛管持水量及总孔隙和毛管孔隙在人工云杉演替过程中表现出“ u ”型变化。
Firstly , after a great deal of investigation and research , the author chose polypropylene ( pp ) and poly ( glycolide - lactide ) ( pgla ) as the tubular fabric material and the acetic acid solution of chitosan as the coating material . polypropylene display superior biomechanical properties while the pgla fiber is characteristic of controllable biodegradability , and chitin integrate the excellent biological properties of both collagen and cellulose 本文首先选定了人工气管支架织物的编织原料为具有生物学惰性及良好力学性能的医用丙纶和具有优良生物性能的聚乙丙交酯；由于甲壳素兼具高等动物组织中的胶原和植物纤维中纤维素两者的优异生物特性，所以在本课题中采用的人工气管涂层材料为壳聚糖乙酸溶液。
Measurement of cell calcium ( review ) methods for the intracellular ca2 + measurement such as aequorin , metallochromic indicators , ion - selective electrodes and fluorescent ca2 + indicators , particularly the fluorescent ca2 + indicators were reviewed in detail . 2 . synthesis of new fluorescence ca2 + indicators and study on their properties tow new fluorescent ca2 + indicators stdin and stdbt have been designed and synthesized and their structures , spectral and biological properties have been studied thoroughly 2 . 5一ht诱导胃底平滑肌细胞钙火花的研究以合成的胞浆特异性caz +荧光探针stdhi一am标记细胞，采用激光共聚焦线扫描技术，首次观察到5一ht诱导胃底平滑肌细胞胞内钙释放的最基本单位一一j塑必尝华盆翔望尝‘一盈些沁( elementaryevents ) ， “钙火花( ealeiumsparks ) ”现象。
