8 research outputs found

    漳州地区犊新蛔虫病的流行病学与防治

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    漳州地区犊新蛔虫病的流行病学与防治庄总来,翁玉麟(厦门大学生物学系,361005)犊新蛔虫(nEOASCArISVITulOruM)是大型线虫,寄生于初生犊牛的小肠。此病分布遍及世界各地,除欧、美、非洲大陆外,亚洲各国感染率都很高,我国长江流域以及南..

    Centralized Management To Share Resource

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    就"211工程"一期实验室建设管理经验进行总结,为二期建设提供参考。The article summarized the experience of lab construction and management in the first stage of Project 211, which offers reference for the construction in the second stage

    杂色鲍碱性磷酸酶在醇、醛和酮溶液中的失活作用

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    报道了杂色鲍碱性磷酸酶(ALP)在甲醇、乙醇、丙醇、甲醛、丙酮等溶液中的失 活动力学.结果表明:酶的剩余活力随着有机溶剂浓度的增大而迅速下降.测得上述 5种有机溶剂对该酶的半抑制率(IC50)分别为5.41、3.07、1.80、31.0×10-3、2.30 mol/dm3.在这些有机溶剂溶液中酶的失活过程都是可逆反应.检测醇、醛、酮对该酶 的失活作用机理,结果表明甲醇、乙醇、丙醇对杂色鲍ALP的失活作用均为非竞争性 机制,其抑制常数分别为5.36、3.02、1.80mol/dm3.甲醛、丙酮对杂色鲍ALP的失活 作用都呈现为混合型抑制,其对游离酶的抑制常数(K1)分别为24.7×10-3、1.66 mol/dm3;对酶-底物络合物的抑制常数(KIS)分别为56.2×10-3、5.40mol/dm3

    仙蜜果花成分的研究

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    仙蜜果属仙人掌科植物,是一种集水果、蔬菜、花卉、药物和环保于一身的纯天然植物.具有很高的经济效益和市场价值,是一种具有巨大开发潜力的植物.本文分析比较仙蜜果花不同部位(花瓣、苞、芯)的营养成分、磷、钙、铜、铁、锌及维生素C含量的差异,以其有利于对该花进行针对性的综合利用和开发

    Set-up State Demonstration Center of Experimental Teaching for Life-science by Education Reforming and Construction

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    该文介绍厦门大学生命科学学院创建“国家级生命科学实验教学示范中心”的实践经验。2000年以来,厦门大学生命科学学院教学改革与建设并举,全面进行教学管理体制改革,建立了“实验教学中心”的实验教学管理新体制;同时集中投入教学经费,购置先进仪器,改善教学实验室条件。“实验教学中心”以提高学生实验技术和科研能力为目标,综合改革实验教学体系。经过5年实践,培养出实验技能扎实的生物学研究型基础人才,取得一批实验教学成果。The experience for constructing the state demonstration center for life-science experimental teaching in Xiamen University was introduced in this paper.Since 2000,the School of Life Sciences in Xiamen University had reformed the administration system for experimental teaching and founded the experimental teaching center.Meanwhile,The school concentrated the education funds to improve the laboratory conditions and gain many modern instruments.Furthermore,The experimental teaching center integrated experimental courses to reform the experimental teaching system for enhancing the experimental technique and scientific research ability of students.After five years of practice,the School of Life Sciences in Xiamen University had educated many foundation talents with proficient biological techniques and bear some fruits in experimental teaching.国家基础科学人才培养基金项目(批号:J0530124

    STUDIES ON ISOLATION, PURIFICATION AND SOME PHYSICAL AND CHEMICAL PROPERTIES OF ALKALINE PHOSPHATASE FROM GREENCRAB (SCYLLA SERRATA)

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    陈清西, 男, 出生于1959 年2 月, 硕士, 副教授,Fax:0086-020-84451672[中文文摘]于1995年2月在厦门海域采集锯缘青蟹,取其内脏经正丁醇抽提、硫酸铵分级分离、DEAE-52离子交换柱层析及SephadexG-200凝胶过滤柱层析纯化,获得碱性磷酸酶制剂,以快速蛋白液相色谱及聚丙烯酰胺凝胶电泳检验其纯度,获得单一蛋白纯的酶制剂。研究酶的物理性质得出该酶的紫外特征吸收峰在278nm处,荧光激发光谱特征峰在282nm处,荧光发射光谱特征峰在343nm处,全酶分子量为78kD。研究酶催化对-硝基苯磷酸二钠水解的动力学性质,金属离子及有机溶剂对其活力的影响,得知该酶水解对-硝基苯磷酸二的最适温度为52℃,最适pH为9.2,米氏常数为6.67×10-4mol/L,酶活性中心的转换常数为460min-1;Mg2+对酶有显著的激活作用;Cn2+,Hg2+和甲醇、乙醇、乙二醇对酶有不同程度的抑制,说明在一定条件下,效应物引起酶分子构象发生了不同程度的变化。[英文文摘]An alkaline phosphatase from green crab (Scylla serrata) was collected from Xiamen sea water in February, 1995. It was prepared and purified by means of the following techniques:n-butanol extraction, ammanium sulfate precipitation, ion exchange chromatography on DEAE cellulose column (DEAE-52) and gel filtration chromatography on Sephadex G-200. The preparation was shown to be homogeous on FPLC and polyacrylamide gel electroporesis. The characteristic peak of UV-absorption spectrum of the enzyme was found to be at 278 nm, the fluorescence excitation spectrum at 282 nm, and the fluorescence emission spectrum at 343 nm. The molecular weight of the enzyme is 78 kD At pH=9.5, the optimum pH is 9.2, at 37℃. At pH= 9.0, 37℃, the Michaelis constant (KM) is 6.67 × 10-4mol/L; Kcat ,460min-1. Magnesium ion activates the enzyme significantly. Copper ion, mercury ion,methanol, ethanol and ethylene glycol ichibit the enzyme echvity in vareing degrees, which indicates tha the conformation of the enzyme caused by the effectors changes at different levels. The inhibition mechanism had been preliminarily studied.国家自然科学基金!3947056

    福寿螺纤维素酶的开发与应用

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    以福寿螺内脏为材料 ,制备纤维素酶粉。测定各组分的酶活力分别为 :内切葡聚糖酶 2 0 .6 5万U/ g ;( β 葡萄糖苷酶 4.2 4万U/ g ;外切葡聚糖酶 0 .48万U/g ;酶粉的蛋白质含量为 37.6 9%、水分为 7.96 %、灰分为 1 .78%。以花生壳作为纤维素酶作用对象 ,测定酶促反应的最适pH为 5 .2 6 ,最适温度为 5 2℃。在 pH5 .2、40℃下 ,纤维素酶作用于花生壳生成葡萄糖 ,在 2h内葡萄糖的生成量与反应时间成正比关系 ,然后逐渐缓慢 ;随着酶浓度的增大 ,葡萄糖的量也呈直线上升 ,说明从福寿螺分离得到的纤维素酶能有效地水解花生壳转化为可被利用的葡萄糖

    福寿螺β-葡萄糖苷酶在脲溶液中失活动力学研究

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    研究福寿螺β-葡萄糖苷酶在脲溶液中变性作用,测定酶在脲溶液中的失活动力学,测定游离酶(E)和酶-底物络合物(ES)的脲失活的微观速度常数,并加以比较,表明底物存在对于酶被脲的失活具有明显的保护作用
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