一氧化氮与心肌再灌注损伤

一氧化氮（NO）是一种生物信息递质，广泛存在于各种细胞和组织中，具有减少血小板聚集、抑制、嗜中性粒细胞聚集等功能。NF－KB被认为是近十年最有研究潜力的调节免疫反应、应激反应、凋亡和炎症的核转录因子。充分认识一氧化氮、NF－KB与心肌再灌注损伤的机制。为对其进一步研究提供理论依据。     

RBF神经网络在煤的热解特性研究中的应用

在MATLAB5．3环境下，利用神经网络工具箱中的RBF神经网络算法，通过煤的元素分析和工业分析对煤的热解特性进行了研究，对热解析温度T1，最大反应速度对应的温度T1max，热解前期热解量G1以及热解完成时间 t进行了预报，预测结果表明用RBF神经网络来研究煤的热解特性，可以达到较高精度，是一种很好的研究方法。     

Web-Based Computing Resource Agent Publishing

Web-based Computing Resource Publishing is a efficient way to provide additional computing capacity for users who need more computing resources than that they themselves could afford by making use of idle computing resources in the Web.Extensibility and reliability are crucial for agent publishing. The parent-child agent framework and primary-slave agent framework were proposed respectively and discussed in detail.     

Lidamycin inhibits tumor growth and pulmonary metastasis in murine breast carcinoma and shows synergy with paclitaxel

The main goal of this study was to investigate whether lidamycin (LDM) could enhance the efficacy of paclitaxel (TAX) against breast cancer. In the MTT assay, LDM showed much more potent cytotoxicity than paclitaxel, and there was a synergy on the 4T1/luc breast cancer cells treated with a combination of paclitaxel and LDM. Western blot analysis showed that paclitaxel and LDM synergistically downregulated MMP9, MMP2, VEGF, and upregulated the cleaved PARP proteins. By wound closure cell migration assay, paclitaxel combined LDM obviously inhibited the migration of 4T1/luc cells. At therapeutic dosage level, LDM, paclitaxel, and the combination suppressed the pulmonary metastases by 70.2%, 53.8%, and 88.7%, respectively, and the CDI value was 0.82, indicating synergism. The results show that LDM enhances the antitumor effect of paclitaxel on 4T1/luc breast cancer, in particular, the antimetastatic effects on pulmonary metastasis.     

Label-free selective sensing of Pb2+ lead(II) sensors based on the aggregation of a pyrene fluorescent probe

In the present work, we report a label-free fluorescence turn-on approach for the sensitive and selective sensing of Pb²⁺. Pyrene with one positive charge was used as the fluorescent probe, and thrombin aptamer (TBA), which was a G-rich oligonucleotide, was employed to form G-quadruplex with lead(II). When TBA and Pb²⁺ were mixed with lead(II) in an aqueous solution, it was folded into a stable G-quadruplex. Subsequently, a single-stranded nucleic acid-specific nuclease S1 was added. The G-quadruplex stabilized by Pb²⁺ lead(II) had markedly a significant resistant ability to nuclease S1 digestion. However, in the absence of Pb²⁺ lead(II), no quadruplex or less stable quadruplex was formed and TBA was digested by nuclease S1 in 3 min under the optimized experimental conditions. Finally, pyrene probe was mixed with oligonucleotide in Pb²⁺ lead(II). Electrostatic interactions between oligonucleotide (a polyanion) and the probe induced the aggregation of the probe, which in turn produced strong emission of the strong pyrene excimer emission. The intensity of the induced excimer emission was directly proportional to the amount of Pb²⁺ added. Our approach shows good selectivity and sensitivity for the detection of Pb²⁺ with a limit of detection limit as low as 800 nmol/L.     

The structure and the sufficint and necessary conditions for generalized statistically self-similar sets

We constructed a class of generalized statistically self-similar sets and give the necessary and sufficent conditions to ensure a random recursive set being a generalized statistically self-similar set. The statistically self-similar sets defined by Hutchinson, Falconer, Graf are the special cases of ours. Foundation item: Supported by the National Natural Science Foundation of China Biography: DENG Ai-jiao (1974-), female, Ph.D. candidate, research interes: is in stochastic process and random ractal     

Electrooxidation of Mn(Ⅱ) on Pb-Sb-As Electrode in Sulfuric Acid

The electrooxidation of Mn(Ⅱ) on Pb-Sb-As alloy electrode in sulfuric acid has been investigated.In order to make the two steps of indirect electrosynthesis of benzaldehyde carried out in the same sulfuric acid concentration and also obtain high current efficiency of Mn(Ⅱ) to Mn(Ⅲ) and high yield of Mn(Ⅲ) oxidizing toluene to benzaldehyde in the mean time,the electrooxidation of Mn(Ⅱ) in 60% H2SO4 has been studied.Experimental results show that high current efficiency of Mn(Ⅲ) (about 75%) is obtained in 60%H2SO4 at 60℃.The reason affecting the current efficiency of Mn(Ⅲ) is discussed,and it is the coordination of sulfuric acid concentration and electrolytic temperature.The law is found that it is suitable for electrolysis at low temperature when sulfuric acid concentration is low and at high temperature when sulfuric acid concentration is high.     

折边锥形封头计算厚度探讨

对国际ＧＢ１５０－８９《钢制压力容器》所规定的折边锥形封头过渡段厚度、锥体厚度及与封头相接的筒体厚度进行了分析，指出了过渡段厚度偏小，提出了合理的过渡段厚度。     

企业的营销管理问题

利用Excel软件对提供的相关数据进处理,并利用最小二乘法原理,建立回归模型,从模型中找到销售产品的最优方案.     

关于发展我国汽车工业的思考

分析了国外的经验并结合我国的经济现状，提出了应将汽车工业作为我国的支柱产业；国家应在资金、技术和人员等方面对汽车工业给予大力扶持，并在汽车进口方面对汽车工业实行适度保护并建议国家应引导汽车产业组建８个大的汽车集团企业，必要时可以采用一定的行政手段