茶刺蛾[Darna trima(more)]颗粒体病毒鉴定及核酸与蛋白质特性的初步研究

1985年从四川珙县分离到的茶刺蛾病原物,经感染试验,组织病理研究,包涵体及病毒粒子超微结构研究,核酸类型鉴别等,定名该病原物为茶刺蛾颗粒体病毒.另对该病毒核酸作了限制性内切酶分析和热变性试验,测得该病毒核酸为双链DNA分子,分子量为64.11×10~6d,93.87kb,Tm值为67.3℃,(G+C)含量为32.7％,包涵体蛋白的氨基酸组分中Asp、Glu和Arg含量高,占氨基酸总量的34.12％,His,Cys和Met含量很少。该病毒对茶刺蛾幼虫有很强的感染力,氨基酸在生物防治上有潜在应用前景.     

TvNPV多角体蛋白与病毒粒子蛋白在银胶溶液中的SERS谱比较研究

栗黄枯叶蛾核型多角体病毒（简称ＴｖＮＰＶ）是成都地区首次发现的一种昆虫病毒．关于ＴｖＮＰＶ多角体蛋白及病毒粒子蛋白的一般拉曼散射（ＯＲＳ）谱研究已有报道［１,２］,这里报道它们在银胶溶液中的表面增强拉曼散射（ＳＥＲＳ）谱实验及其对实验结果的分析．１材...     

栗黄枯叶蛾核型多角体病毒病毒粒子的拉曼光谱研究

通过对栗黄枯叶蛾核型多角体病毒TvNPV(Trabala vishnou Nuclear Po-lyhedrosis Virus)的病毒粒子的拉曼光谱研究,讨论了它的蛋白质分子空间构象.其蛋白质主要为β折叠结构、α螺旋结构以及少量无规卷曲(其中包括β回折)结构.蛋白质中酪氨酸残基多数暴露于分子表面,少数埋藏在分子内部;色氨酸残基大多埋藏在疏水环境中.蛋白质分子侧链C—C—S—S—C—C构型为反式—扭曲—反式.     

栗黄枯叶蛾核型多角体病毒病毒粒子的表面增强拉曼光谱研究

研究了栗黄枯叶蛾核型多角体病毒(Trabala vishnou Nuclear PolyhedrosisVirus)的病毒粒子蛋白(Virion Protein),简称TV—NPV—VP,在不同pH值条件下于银胶中的表面增强拉曼光谱.将TV—NPV—VP在中pH值的表面增强拉曼光谱(SER谱)与它的一般拉曼光谱(OR谱)作了比较分析。样品在不同pH值条件的SER谱反映了其不同的吸附特征,说明分子的表面几何状态随pH值的不同而改变.TV—NPV—VP和银胶表面的吸附主要是化学吸附.增强机理具有短程特征.     

人用单克隆抗体某些鼠源性病毒探针的初步建立和应用

本文报导了用光敏生物素标记的鼠肝炎(MHV)、鼠痘(Ectro)全基因组核酸探针来检测人用单克隆抗体鼠源性病毒的初步应用。同时用间接免疫荧光(IFA),鸡胚绒毛尿囊膜感染试验(CAM),病理包涵体检查。结果是探针法与IFA法均能检测MHV。Ectro通过上述试验均为阴性。     

斜纹夜蛾(Prodenia litura)幼虫核多角体病毒核酸(DNA)的分离和电镜观察

Bergold(1963)综合地报导了昆虫核型多角体病毒的性质;对家蚕核型多角体病毒核酸也陆续进行了研究;我国沈思祥等对家蚕核多角体病毒核酸(DNA)进行了研究,并报导其分子量为1.6×10~7。我们对农作物的主要害虫斜纹夜蛾的核型多角体病毒核酸进行分离和电子显微镜观察。     

盗毒蛾核型多角体病毒的分离鉴定

作者从自然罹病死亡的盗毒蛾幼虫中分离到一株昆虫病原物,经鉴定,该病原物为盗毒蛾核型多角体病毒(PsNPV),该病毒包涵体多数呈三角形、四边形,部分呈多角形,其大小为1000～2000nm;病毒粒子呈杆状,为单粒包埋型(SEV),其大小为(250～350)nm×(40～60)nm.通过感染试验测定了盗毒蛾核型多角体病毒的毒力,结果显示其LC50为3.34×104PIB/mL;以3×106PIB/mL和3×105PIB/mL两种浓度感染盗毒蛾幼虫,测得LT50分别为5.78d和6.24d.     

简讯

我校生物系与惠民地区农业局植保站协作,对大豆银纹夜蛾核型多角体病毒的研究已于一九八三年一月十日在济南市由山东省教育厅组织通过了鉴定。在该项研究工作中,他们对大豆银纹夜蛾核型多角体病毒进行了活体重复感染试验,组织病变观察,多角体超薄切片及病毒粒子电镜观察和核酸的生化分析等系统的研究。同时对该病毒两种形态不同的包含体进     

中国对虾暴发性流行病杆状病毒的提取纯化及病原性实验

通过病毒纯化技术及电镜检测 ,发现患病的中国对虾体内有带囊膜的杆状病毒 .该病毒粒子大小为 (3 0 0～ 4 0 0 )nm× (1 60～ 1 80 )nm ,囊膜 2 0～4 0nm ,无包涵体 .人工回接实验表明 ,病虾的肝胰脏、中肠、胃、心肌组织内均分布有大量的病毒粒子 ,该病毒粒子在形态、大小、囊膜的有无及包涵体的有无等诸方面均与感染前部分纯化的病毒粒子一致 .根据柯氏法则 ,患病的中国对虾是由杆状病毒的侵袭所致 .     

EB病毒核抗原1羧基端原核表达产物的纯化方法

EB病毒核抗原1羧基端的原核表达产物以包涵体和可溶性两种形式存在,用镍离子亲和柱分别对其进行了纯化.结果显示,可溶性部分以及经2M尿素溶解后的包涵体的最适咪唑洗脱浓度均为150mM.纯化后重组蛋白的纯度在90%以上.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.