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.     

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.     

Diamond synthesis from a system of chromium-carbide and Ni70Mn25Co5 alloy

In order to ascertain the mechanism of interaction between carbide and metallic catalyst and formation of diamond under high pressure and high temperature, and find a new method to synthesize diamond with special properties, it is necessary to investigate the reaction behavior of different carbides and metallic solvent_catalysts under high pressure and high temperature. A system of Cr-3C-2 powder and Ni 70Mn 25Co 5 alloy in weight ratio of 1∶6 was treated under 6 0 GPa and 1 500℃ for 20, 30 or 60 min respectively. X_ray diffraction of the samples indicated the Cr 3C 2 decomposed partially after high pressure and temperature treatment, and Cr 7C 3, Cr and diamond formed respectively. There was not any trace of graphite in the samples. The result suggested that the separated carbon atoms could form diamond directly without conversion process of graphite into diamond. The observation of SEI, WDX and EDX also showed that diamond crystals were synthesized in the system, which have perfect surfaces and shapes, with the average grain size of about 40 μm. The properties of the crystals are being investigated.     

Relationship between giant magnetoresistance of NiFe/Cu multilayers and their microstructures

The (111)-orientated NiFe/Cu multilayers were prepared by magnetron sputtering method. At room temperature, saturation magnetoresistances of NiFe/CU multilayers oscillate as a function of Cu spacer layer thickness. Two peak GMR values of 19.4%, 11.6% and 11.2%, 1% appear, respectively, at Cu sublayer thickness of t_Cu,= 1.0, 2.2 nm while the deposition pressures are 0.25 and 0.45 Pa. X-ray small-angle reflections and diffuse scattering at Cu K-edge (8.979 keV) by synchrotron radiation source were used to characterize the interfacial roughness. Diffraction anomalous fine-structure scattering (DAFS) was performed to investigate the local structure of NiFe and Cu sublayers. Results show that the deposition pressure has effect on interfacial roughness of the samples obviously, and the interfacial roughness also affects the GMR values of the samples strongly.     

支持CAD／CAPP／CAM集成和并行的制造特征

由于设计和制造过程的复杂性,目前还没有一种有效的方法能彻底解决产品设计、制造和生产管理等生命周期内各个阶段的信息集成问题．探讨了并行工程下的ＣＡＤ／ＣＡＰＰ／ＣＡＭ的集成框架,提出了支持ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成和并行运行的制造特征,并在商品化ＣＡＤ／ＣＡＭ软件ＵＧⅡ上进行了开发工作．该系统已通过纺织行业箱体、柴油机行业的油泵以及机床厂的主轴箱等多种零件考核．     

1673K下BaO-BaF_2-Cr_2O_3渣系的热力学性质

１６７３Ｋ下,采用－ＭｏＣｒ＋Ｃｒ２Ｏ３ＺｒＯ２（ＭｇＯ）｛Ｃｕ＋Ｃｒ｝ａｌｏｙ＋（Ｃｒ２Ｏ３）ｓｌａｇＭｏ＋固体电解质电池测定了ＢａＯＢａＦ２Ｃｒ２Ｏ３渣系中Ｃｒ２Ｏ３的活度．研究结果表明,Ｃｒ２Ｏ３的活度随其浓度升高而升高,随ＸＢａＯ／ＸＢａＦ２升高而降低．根据实验及Ｘ射线衍射结果推测了该渣系的等温相图,并作出了该渣系中Ｃｒ２Ｏ３的等活度图．     

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％。     

空化噪声特性实验研究

利用不同类型的轴对称头体和ＮＡＣＡ１６０１２翼型做了一系列空化噪声实验,得到轴对称头体在不同空化数及不同速度下的空化噪声谱及翼型在不同的攻角下的空化噪声谱．这一系列的噪声谱表明,各种轴对称头体的空化噪声总声级随空化数的减小而升高,但噪声谱形具有明显的相似形;翼型在片空化、泡空化和云雾空化状态下所辐射的噪声谱存在明显的差别．噪声总声级的变化较为复杂,由泡空化状态转换到片空化状态,空化数虽然减小,但总声级会突然降低．针对翼型在泡空化状态下所辐射噪声谱的特征,利用单空泡溃灭理论进行了尝试性的解释和说明．     

良好生产管理规范与全面质量管理及其在生物制品生产管理中的应用

从质量及生物制品质量的概念出发,阐述了良好生产管理规范（ＧＭＰ）管理模式和全面质量管理（ＴＱＣ）模式的基本内容及其在生物制品行业中的应用,认为ＴＱＣ是当今工业企业的现代化管理手段和方法,而ＧＭＰ是针对药品生产行业制定的一整套保证产品质量的基本要求．要想不断提高企业管理素质,改进产品质量,在生物制品企业中进行ＧＭＰ管理的同时,必须实行ＴＱＣ管理,ＴＱＣ所涉及的内容要比ＧＭＰ更广泛、更全面,而ＧＭＰ的实施又为ＴＱＣ的进行打下了良好的基础．