新疆北疆部分地区猪附红细胞体与圆环病毒混合感染的诊断

分别采集60份新疆北疆地区部分规模化猪场疑似感染PCV-2和附红细胞体病死猪的肺脏及血液,利用PCR方法检测PCV-2部分基因序列,瑞氏染色后光学显微镜观察附红细胞体。结果显示,60份肺脏中,PCV-2阳性29份,阳性率为48．3％,60份猪血涂片中42份呈现附红细胞体感染,阳性率为70％。检出PCV-2的阳性猪血中有25份附红细胞体镜检阳性,说明PCV-2与附红细胞体存在共同感染。     

甘肃省13例新型冠状病毒就诊病例IgM抗体检测结果分析

分析兰州市肺科医院新型冠状病毒6名确诊病例及7名疑似病例血清IgM抗体检测和咽拭子核酸检测的结果,为新型冠状病毒感染(COVID-19)的快速诊断提供科学依据。收集我院13名疑似COVID-19就诊病例流行病学史、临床症状、咽拭子核酸检测和血清COVID-19-IgM抗体检测结果进行分析。确诊的6例COVID-19病例血清COVID-19-IgM抗体在15d时均为阳性,经过核酸检测排除新冠肺炎的7例疑似病例,血清COVID-19-IgM抗体在15天时均为阴性。血清COVID-19-IgM抗体检测可作为新型冠状病毒感染的辅助诊断手段。     

抗癌药物6-MP对小白鼠染色质小体的影响和EMX效果

将5周龄的DDY系小白鼠40只,分对照、6-巯基嘌呤腹腔注射（6-MP组）、6-MP＋500倍稀释的EMX饮水（EMX饮水组）、6-MP＋EMX腹腔注射（EMX注射组）4个组,每组10只。试验8周后断头屠杀,取左侧大腿骨骨髓制作涂片,分别用姬姆萨和吖啶橙（AO）荧光染色,用普通显微镜和荧光显微镜观察1 000个多染性红细胞（PCE）,记录其中出现染色质小体的比例（MNPCE/1000PCE）。结果表明：抗癌药物6-MP组和对照组之间的染色质小体数差异极显著（P〈0.01）,而且EMX饮水和EMX注射能显著降低染色质小体的出现率（P〈0.01）。说明EMX能有效减少抗癌药物引起的染色体异常。姬姆萨染色和吖啶橙（AO）荧光染色结果呈正高度相关（r=0.999）,姬姆萨染色可以替代吖啶橙（AO）荧光染色做染色质小体试验的测定。     

贵州小型猪病原生物携带和感染状况的调查

目的检测贵州小型猪病原生物携带和感染状况,为进行微生物与寄生虫控制提供依据。方法采集贵州小型猪封闭群皮毛、分泌物、血液及粪便等标本,采用形态观察、生化反应和血清学方法检测不同部位共36种微生物与寄生虫指标。结果在36种检测指标中,该种群对28种病原生物有不同程度的携带和感染。结论贵州小型猪的病原携带和感染现状是对其进行微生物与寄生虫监测和控制的主要依据。     

呼肠孤病毒草鱼肾脏的病理变化观察

研究呼肠孤病毒草鱼肾脏感染后肾脏的病理变化.用常规(HE)染色方法观察草鱼在感染呼肠孤病毒后的病理改变,透射电镜观察感染呼肠孤病毒的草鱼肾脏的显微结构变化结果,临床上感染后的草鱼出现严重出血变化.7 d出现死亡并达到最高峰,死亡率为85%,H.E染色发现肾小管上皮和血管细胞严重变性、坏死,肾小球萎缩和基膜的间隙增大,部...     

猪附红细胞体病的实验室诊断

通过对奎屯某猪场病猪的临诊表现及剖解变化、猪附红细胞体病原的形态观察、体外培养试验、感染试验以及感染情况的调查,确定该病为附红细胞体病。     

南昌地区腹泻儿童粪便隐孢子虫卵囊的检查

取江西省儿童医院132名腹泻住院儿童粪便,经处理和抗酸染色后,发现17份有类似隐孢子虫卵囊.后取17份中的2价标本,经人工感染小鼠,未能证明其致病性.后又分别将17份可疑阳性的粪便样品接种于沙堡弱琼脂平板上,室温培养24h,结果以感染小鼠粪便及沙堡弱琼脂上均分离出酵母菌.培养出的酵母菌经抗酸染色,发现少数酵母菌也可呈现阳性,故以抗酸染色法检查粪便中的隐孢子虫卵囊时要注意与酵母菌相区别.这次132例中未能证实其中有隐孢子虫.     

绵羊附红细胞体感染PCR检测方法的建立

为建立特异、敏感、快速的绵羊附红细胞体感染诊断方法,本试验根据已测得的绵羊附红细胞体16S rRNA基因序列（GeneBank：EU916726、FJ440328）,设计1对特异性引物,建立了绵羊附红细胞体的PCR诊断方法。特异性实验和敏感性实验结果表明,该方法与绵羊肺炎支原体、大肠杆菌、葡萄球菌、白色念珠菌、枯草杆菌均无交叉反应,能检测到绵羊附红细胞体最低DNA量为5．2pg/μL．在-80℃存放1年的皿样中也检测到阳性样品。通过临床血样检测,证明该方法可以用于本病的早期感染和隐性感染的检测。     

腔隙莫拉菌所致泌尿、男生殖道感染一例

目的:泌尿、男生殖道感染主要是由病原微生物侵入泌尿、男生殖系统繁殖引起的炎症.引起感染的病原菌大多是G菌,最常见的致病菌是来自肠道细菌,但淋病奈瑟菌引起的特异性感染,因其感染方式途径的特殊性,应明确病原体.方法及资料:本病例患者39岁,男性,因排尿时尿道口疼痛伴黄色分泌物经头孢曲松+左氧氟沙星治疗数日后复发,来榆中县中医院门诊就诊.门诊查尿常规无异常,怀疑淋病,为明确感染性质,随取泌尿、生殖道分泌物送检细菌培养及涂片检查.涂片经革兰染色镜检,可见大量白细胞及G双球菌,且有吞噬及伴行现象.结果:细菌培养鉴定为腔隙莫拉菌.讨论:经该病例的分析,以明确对泌尿、男生殖系统感染其他病原菌与淋病奈瑟菌感染的性质.淋病奈瑟菌与腔隙莫拉菌形态很难辨认,容易混淆,引起误诊,培养鉴定方能明确病原菌性质.     

日本血吸虫尾蚴不同染色方法的比较研究

目的探索不同化学染色法对日本血吸虫尾蚴的染色效果,并对其形态结构进行分析,为血吸虫研究和教学提供参考。方法采用自然逸出法从阳性钉螺获取尾蚴,涂片法制作尾蚴玻片标本,分别采用苏木素-伊红(HE)染液、瑞氏-姬姆萨染液、尼氏(Nissl)染液、0.4%台盼蓝、考马斯亮蓝R-250染液、丽春红染液、0.1%茜素红染液、刚果红染液等化学染料进行染色,在光学显微镜下观察和评价尾蚴形态结构,比较各方法的染色效果。结果形态学测量的结果显示获取的尾蚴为成熟期尾蚴,8种染色方法均能使血吸虫尾蚴呈不同程度的着色,但在尾蚴形态结构显示上有相似性,亦有不同之处。HE染色、瑞氏-姬姆萨染色、台盼蓝和尼氏染色等对尾蚴头部和尾部结构均能较好显示。考马斯亮蓝和丽春红染色对尾蚴头部微细结构均显示欠佳,但考马斯亮蓝可显示尾部排泄管,丽春红可显示尾部部分结构。茜素红、刚果红染色效果类似,对头部和尾部结构均能部分显示。结论 HE染色能将尾蚴各部位器官显示清楚,对比明显,可在教学科研中广泛使用。其余染色方法应根据研究目的不同,选取不同的方法。     

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.     

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.     

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.     

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

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

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-