产消者日前-实时多阶段鲁棒优化调度方法

考虑产消者实时调度的非预期性,构建了产消者日前-实时多阶段鲁棒优化调度模型,并提出了基于RDDP结合C&CG的求解算法。首先,计及风电出力和负荷需求的不确定性,构建了基于多阶段鲁棒优化的产消者日前-实时优化运行模型;其次,提出了相应优化调度问题求解的RDDP和C&CG算法;最后,基于产消者的日前-实时最优调度结果开展算例分析。算例结果表明,相比于两阶段鲁棒优化模型,多阶段鲁棒优化模型在最坏情况下的产消者整体运行成本更高,符合产消者实时调度的非预期性。

单宁在抗艾滋病研究中的应用

本文综述了近十年内各类单宁（包括没食子单宁、鞣花单宁、缩合单宁和复杂单宁）及单宁衍生物在抗艾滋病研究中的应用情况。

用艾滋病毒和马传染性贫血病毒逆转录酶筛选抗艾滋病毒中药的研究

作者研究了艾滋病病毒逆转录酶(HIV—RT)抑制剂PFA、Suramine对HIV—RT和马传染性贫血病病毒逆转录酶(EIAV—RT)的抑制作用。对HIV—RT、EIAV—RT的50％抑制浓度(IC_(50)),PFA分别为0.2μmol、9.8μmol,Suramin分别为17μmol、19.9μmol。以HIV—RT和EIAV—RT作为靶酶,筛选了30多种中药复方、单味药提取物及中药成分,发现虎杖、田七粉等5种中药粗提物,槲寄生黄酮、白毛夏枯草黄酮、马兜铃酸等7种成分及1种复方小柴胡汤提取物对两种酶有不同程度的抑制作用。两种酶作用平行,但不如HIV—RT敏感,表明HIV—RT可用于筛选抗艾滋病药物。

基于虚拟信道的SpaceWire总线网络技术应用研究

针对卫星载荷数据传输特点及CCSDS AOS协议虚拟信道处理的具体应用,结合SpaceWire总线传输协议,提出了一种基于虚拟信道的SpaceWire总线网络传输策略,该策略面向载荷数据处理与传输需求,优化了数据处理过程,提高了SpaceWire总线网络传输效率;减少了系统存储、调度资源,提供了系统可靠性。

A novel non-radioactive assay for HIV-RT(RdDp)based on pyrosequencing for high-throughput drug screening

Current in vitro assays for the activity of HIV-RT(reverse transcriptase)require radio-labeled or chemically modified nucleotides to detect reaction products.However,these assays are inherently end-point measurements and labor intensive.Here we describe a novel non-radioactive assay based on the principle of pyrosequencing coupledenzyme system to monitor the activity of HIV-RT by indirectly measuring the release of pyrophosphate(PPi),which is generated during nascent strand synthesis.The results show that our assay could monitor HIV-RT activity with high sensitivity and is suitable for rapid highthroughput drug screening targeting anti-HIV therapies due to its high speed and convenience.Moreover,this assay can be used to measure primase activity in an easy and sensitive manner,which suggests that this novel approach could be wildly used to analyze the activity of PPi-generated and ATP-free enzyme reactions.

<i>In Vitro</i>Anti-HIV Activity of Partially Purified Coumarin(s) Isolated from Fungal Endophyte, <i>Alternaria</i>Species of <i>Calophyllum inophyllum</i>

5 totally different endophytic fungal species were isolated from bark and leaf parts of Calophyllum inophyllum. Leaf part yielded Trichoderma harzianum and Alternaria species, whereas bark showed the presence of Fusarium species, Aspergillus species and unidentified fungi. Two solvents (hexane and methanol) were used for endophytic fungal extraction and the Alternaria species had shown the presence of coumarin whereas Trichoderma harzianum in methanol extract and Fusarium species in hexane extract had shown the coumarin(s) in all the four methods tested. The total coumarin yield was more in microwave assistance method, the methanol Alternaria species (3.941 ± 0.082) stood first, followed by hexane extract of Alternaria species (3.254 ± 0.082), Fusarium species (2.532 ± 0.082) and Trichoderma harzianum (2.294 ± 0.082), the plant extract showed 4.149 + 0.053. The methanol extract of Alternaria species inhibited the activity of HIV-Reverse Transcriptase (RT) (82.81 ± 1.0), integrase (98%) and protease (78) in maximum level followed by hexane extract of Alternaria species (71.12 ± 0.9, 89, 68), Fusarium species (63.92 ± 1.8, 67, 66) and Trichoderma harzianum (56.69 ± 0.9, 71, 63). The endophytic fungi Alternaria species inhibited all the three viral enzymes at maximum level and it was more than standard drug. However, in order to know possible anti-HIV, it is necessary to isolate active coumarin from the Alternaria species and the mechanism of action will be studied in future studies.

Role of Ligand Reorganization and Conformational Restraints on the Binding Free Energies of DAPY Non-Nucleoside Inhibitors to HIV Reverse Transcriptase

The results of computer simulations of the binding of etravirine (TMC125) and rilpivirine (TMC278) to HIV reverse transcriptase are reported. It is confirmed that consistent binding free energy estimates are obtained with or without the application of torsional restraints when the free energies of imposing the restraints are taken into account. The restraints have a smaller influence on the thermodynamics and apparent kinetics of binding of TMC125 compared to the more flexible TMC278 inhibitor. The concept of the reorganization free energy of binding is useful to understand and categorize these effects. Contrary to expectations, the use of conformational restraints did not consistently enhance convergence of binding free energy estimates due to suppression of binding/unbinding pathways and due to the influence of rotational degrees of freedom not directly controlled by the restraints. Physical insights concerning the thermodynamic driving forces for binding and the role of “jiggling” and “wiggling” motion of the ligands are discussed. Based on these insights we conclude that an ideal inhibitor, if chemically realizable, would possess the electrostatic charge distribution of TMC125, so as to form strong interactions with the receptor, and the larger and more flexible substituents of TMC278, so as to minimize reorganization free energy penalties and the effects of resistance mutations, suitably modified, as in TMC125, so as to disfavor the formation of non-binding competent extended conformations when free in solution.

Synthesis and Biological Activities of Novel s-Triazine Bridged Dinucleoside Analogs

A series of novel dinucleosides linked by s-triazine were synthesized via the nucleophilic substitution reaction of amino nucleoside and cyanuric chloride in THF/H20. The biological activities of these novel dinucleoside analogs against HIV-RT, HeLa and A-549 cell lines in vitro were evaluated.