生物活性的

In fact, the application of chiral ILs in asymmetric catalytic transformations is still at a preliminary stage.Benzoin is an important intermediate in organosynthesis. And more than, chiral benzoin is important structure unit of many bioactive compounds and building blocks of many enantioselective synthesis.

苯偶姻是一种重要的有机合成中间体，而且光学活性苯偶姻是许多生物活性化合物的重要结构单元，是可用于立体选择性合成生物活性有机分子的重要合成砌块。

In recent years, studies on limonoids have focused on the chemical structures, biosynthesis and biological activities.

这类化合物具有明显抗癌和抗菌等生物活性，近年来的研究集中在其化学结构、生物合成和生物活性等方面。

Based on toxicity mechanism, a QSAR model was established and used to explain the toxicity of organic chemicals to fathead minnow and Photobacterium phosphoreum, which showed good relationships with wide range of organic compounds.

根据毒性机理，从理论上推导出有机物的定量结构—活性方程，并用来解释有机物对呆鲦鱼和发光菌的毒性，成功地阐述了有机物对水生生物的毒性机制，区分了有机物对不同生物的毒性的联系和区别，为有机物生物活性预测提供了新的思路。

To evaluate the bioactivity of the glass-ceramics,the specimens were soaked in the simulated body fluid. The results indicate that fluorapatite shows needle-like microstructure, which is similar to that in human bone and teeth. The formation of needle-like fluorapatite is related to the heat treatment procedure, which results in needle-like fluorapatite crystals by accelerating one-dimension growth along the c-axis through the screw dislocation growth mechanism. The mechanical properties of the glass-ceramics are close to those of the human bone and teeth. The bioactivity test results show that apatite layer is precipitated on the materials surface after 3 d immersion in SBF, which indicates the glass-ceramics have a good bioactivity.

研究结果表明：氟磷灰石相呈针状，与人体骨和牙齿的磷灰石形貌相似，有利于提高材料的生物活性和生物相容性；氟磷灰石的形成是材料被迅速加热至高温进行热处理，使磷灰石以螺旋位错生长机制沿c轴晶化长大所致；经热处理获得的材料具有优良的力学性能，基本满足骨科和齿科用生物材料的性能要求；材料在体外模拟体液中浸泡3 d后，样品表面已有磷灰石层生成，表明该材料具有较高的生物活性。

RESULTS The proliferation of fibroblasts was inhibited by K102 in vitro. A dose-dependent antagonistic effect was found between K102 and bFGF. The serum levels of ALT, AST and the liver hydroxyproline level in the treated groups were lower than that in the CCl4 model group. Pathological examination showed a slight fatty degeneration and hydropic degeneration was observed in the group treated with the high dose K102, the low dose K102, and the control group.

结果体外生物活性检测：K102明显抑制成纤维细胞的生长，bFGF对K102有一定拮抗作用，且具有剂量依赖性；体内生物活性检测：治疗给药组血清ALT，AST和肝组织羟脯氨酸含量较CCl4模型组明显改善。

objectiveto predict the promoting effect of chinese medicine on proliferation of rat bone marrow mesenchymal stem cells by bioactivity fingerprint in vitro.methodsthe ointment of plastrum testudinis was extracted by petroleum ether,ether and dichloromethane in burn to gain the extracts.the effects on the proliferation of bmmscs were examined by mtt assay and flow cytometry analysis, and each sample was studied by gc-ms.

目的运用生物活性指纹图谱预测其它中药能否促进骨髓间充质干细胞（bone marrow mesenchymal stem cells，bmmscs）。方法龟版浸膏依次用石油醚、乙醚、二氯甲烷提取，得到溶剂提取物，用mtt 比色法及流式细胞仪器研究了溶剂提取物干细胞活性，采用gc-ms 技术研究每一个提取物，根据总离子流色谱图的相同保留时间和相应峰面积，获得龟版浸膏 gc-ms 生物活性指纹图谱。

Little is known about the influence of minerals and other soil factors on the biocontrol activity of Trichoderma spp.The objectives of this study were to first evaluate the take-all–suppressive activity of T.koningii in field soils representative of the wheat-growing region in the Pacific Northwest of the United States,and then to identify abiotic edaphic parameters that are positively and negatively associated with the biocontrol activity of T.koningii in these soils.Such information will be usefulin selecting sites where T.koningii can be expected to perform optimally;in developing formulations that enhance biocontrol;and perhaps in indicating factors that favor mechanisms involved in the biocontrol activity of this strain such as antibiotic and enzyme biosynthesis.

知之甚少，对矿物和其它土壤因素对生物活性木霉镰刀本研究的目的首先评估全蚀抑制活性t.koningii土壤代表小麦种植区在西北太平洋的美国，然后找出生物土壤参数有积极和消极与生物防治活性t.koningii在soils.such这些信息将有助于在选择地点，可以t.koningii预计进入最佳状态；在发展制剂提高生物防治；或许说明因素，有利于参与机制，在生物防治活动，这株如抗生素和酶的合成。

This article will introduce the main composition of bioactive glass particles and discuss the bone healing around this alloplast in the bony defect.

本文藉文献回顾介绍生物活性玻璃的主要成份、探讨生物活性玻璃於骨缺损中骨组织的愈合情形并比较生物活性玻璃与其他骨移植物或再生材料於不同适应症的临床效果。

BACKGROUND ＆ AIM: Betulin is an important triterpene. We investigated the antitumor activity of betulin, extracted from the bark of silver birch.

背景与目的：白桦酯醇是一种重要的三萜类生物活性分子，本文从白桦树皮中提取获得白桦酯醇纯品，然后研究该生物活性分子抑制食管癌细胞的活性。

HDL reference, in which 1μg apoAI was thought of as one activity unit, was prepared by ultracentrifuging.

测定时，以超速离心制备的HDL参考品为标准，按每1μg apoAI为1个HDL活性单位，由参考品的光吸收值和相应的活性单位数，求出HDL生物活性标准曲线的双对数回归方程，并由样品的光吸收值计算HDL制剂的生物活性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。