Genomic organization of EDSV strain AA-2

The genomic organization of egg drop syndrome virus strain AA-2 isolated in China is reported here. The genome was found to be 32 838 bp in length, approximately 2 kb shorter than those of the human subgenus C adenoviruses. Analysis of open reading frames indicated that the genes for major viral structural proteins (55 K, Penton base, pⅦ, pⅩ, pⅥ, Hexon, 100 K, pⅧ and Fiber), as well as EP, DNA polymerase and ⅣaⅡ are present in the expected locations in the genome. EDSV possesses no identifiable E3 and E4 regions and most proteins encoded by E3 and E4 regions of other adenoviruses genome were not presented in EDSV.     

The realization and structure of complete Lie algebras whose nilpotent radicals are Heisenberg algebras

The realization and siructure of complete Lie algebras whose nilpotent radicals are Heisenberg algebras over the complex field C are given.     

Origin of immature sulfur-rich oil in Jianghan oil field

Chemical structure of immature sulfur-rich kerogen and composition of immature sulfur-rich crude oil in Jianghun oil field have been studied. In molecular level, crude oil differs from thermolysed and chemolysed products of kerogen but does resemble the bitumen in immature sulfur-rich source rock. Therefore, immature sulfur-rich oil may be derived from the expelling of bitumen rather than from thermal cracking of kerogen.     

High-precision timing of the Quaternary standard samples with thermal ionization mass spectrometry (TIMS) U-series method

Two national stalagmite standard (GBW04412, GBW04413) and one international coral standard (RKM_4) have been determined by using thermal ionization mass spectrometry (TIMS) method. The values of ( 234 U/ 238 U) act , ( 230 Th/ 234 U) act and age are all consistent in error range with the standard values obtained by using α spectrometry.     

Cloning, construction of prokaryotic expression vector and expression ofEscherichia coli cytosine deaminase gene

Cytosine deaminase gene ofEscherichia coli strain H-30 was cloned, and its initiation codon of ‘GTG’ was mutated to ‘ATG’ by PCR. Prokaryotic recombinant expression vector pBV220-CD was constructed. Clone with high enzyme activity were selected by detecting their specific activity of cytosine deaminase. 5-FC(5-FC, 5-fluorocytosine) could induce the lethal toxicity to cells containing active CD gene. DNA sequence analysis indicated that there were 16 altered bases and 5 of them resulted in the alteration of amino acids in predicted peptide by comparing DNA sequence of the clone H-30-CD-11 with high enzyme activity with CD gene reported in Gene Bank.     

液体燃料爆炸抛撒过程分析

该文建立了描述液体燃料空气炸药云雾运动规律的模型,给出了云雾膨胀过程３个阶段的速度—半径关系或速度—时间关系,以及云雾中燃料液滴的尺寸估计。     

吸收比-系数倍率法及其应用——水杨酸钠、安替比林和咖啡因的同时测定

用吸收比－系数倍率法同时测定撒痛风注射液中水杨酸钠、安替比林和咖啡因三组分的含量。它们的回收率分别为１００．７％～１０２．１％、９５．９３％～１０４．５％和９７．５７％～１０１．７％。     

HYDC数据压缩器

描述了采用代换式压缩法,设计一个高效率的数据压缩器ＨＹＤＣ的过程,并给出一个在实际应用中的例子。     

并联机器人及其机构学理论

介绍了并联式机器人,以及并联机器人机构学理论及其发展,特别介绍在称为２１世纪的新型机床;分析了并联机器人的结构,特点和广泛的应用前景。     

仔猪混合感染致病性白色葡萄球菌和大肠杆菌的诊断及防制初报

经过病原的分离鉴定、致病性试验及病仔猪防治效果的分析,确诊某集约化养猪场仔猪发生以“渗出性皮炎”为主的疾病为致病性白色葡萄球菌和大肠杆菌混合感染,通过采取综合的防制措施后,彻底控制本病的发生和流行。