Cell Fuelling and Metabolic Energy Conservation in Synthetic Cells

We are aiming for a blue print for synthesizing (moderately complex) subcellular systems from molecular components and ultimately for constructing life. However, without comprehensive instructions and design principles, we rely on simple reaction routes to operate the essential functions of life. The first forms of synthetic life will not make every building block for polymers de novo according to complex pathways, rather they will be fed with amino acids, fatty acids and nucleotides. Controlled energy supply is crucial for any synthetic cell, no matter how complex. Herein, we describe the simplest pathways for the efficient generation of ATP and electrochemical ion gradients. We have estimated the demand for ATP by polymer synthesis and maintenance processes in small cell-like systems, and we describe circuits to control the need for ATP. We also present fluorescence-based sensors for pH, ionic strength, excluded volume, ATP/ADP, and viscosity, which allow the major physicochemical conditions inside cells to be monitored and tuned.     

硅窗气调对灵武长枣生理变化的影响

研究硅窗气调对灵武长枣贮藏中生理变化的影响,用不同的硅窗对灵武长枣处理,结果表明,使用5×5的硅窗袋进行气调,可以有效的保持灵武长枣的硬度以及VC含量,且能有效抑制乙醇的产生.经过这样处理的灵武长枣,其保质期可达到90d以上,好果率在94％以上.     

Relationships betweenDendroctonus micans Kug. (Coleoptera: Scolytidae) survival and development and biochemical changes in Norway Spruce,Picea abies (L.) Karst., phloem caused by mechanical wounding

The bark of Norway spruce trees,Picea abies (L.) Karst., was wounded to produce areas of bark with differing biochemical characteristics. Adults and larvae ofDendroctonus micans Kug. were inserted into these trees at points around the wounds. Larval survival was higher, larval dry weights were higher, and adults were more likely to oviposit at sites around the wound that had higher phloem moisture contents. Larvae showed higher survival and dry weights in phloem with low terpene contents. Adults oviposited in phloem with lower stilbene glucoside contents. Phloem moisture differed at sites around the wound compared with that at a control site away from the wound, and the nitrogen content of entire bark cores was higher above wounds than at control sites away from the wounds. Phloem moisture correlated with the nitrogen content of entire bark. Phloem terpene contents correlated with each other, as did the stilbene contents. Associations between the host exploitation pattern ofD. micans and the biochemistry of the host phloem are discussed in relation to preselection by adults of sites suitable for larval development.     

厌氧生化技术在己内酰胺废水处理中的应用

根据己内酰胺装置废水的特点 ,选用了厌氧生化处理技术对其中有机废水进行预处理。讨论了温度、pH值、营养盐、微量元素等外在因素及硫酸盐、氨氮浓度、有机物组成成分等内在因素对系统的影响及其对策。提出了最佳运行条件 :负荷 4.5～ 5 .0kgCOD/(m3·d) ,波动小于 15 % ,进水温度约 33℃ ,进水 pH值为 5～ 6,温度 35～ 38℃ ,pH值为 7.5～ 8.5 ,挥发性脂肪酸小于 12mmol/L ,硫酸盐浓度不大于 5 0 0mg/L。处理后己内酰胺废水COD值由原 15 0 0 0mg/L降低至 1977mg/L。     

一类生化反应模型的定性分析

应用微分方程定性理论研究一类生化反应模型,证明其极限环的存在性,不存在性及存在唯一性的条件,得到了包围唯一奇点的外境界线。     

纳米二氧化铈制备和应用研究进展

目的 通过比较各类纳米二氧化铈制备方法的优缺点,总结纳米二氧化铈在食品生物化学检测、催化与燃料电池等领域的应用研究,以促进纳米CeO2的发展,并为其应用提供参考.方法 对比分析纳米二氧化铈的制备方法,包括水热合成法、沉淀法、溶剂热法、溶胶-凝胶法、微乳液法和电化学沉积法.阐述纳米CeO2在催化(催化甲苯、CO和NOx、光催化)、食品生物化学检测(抗坏血酸、葡萄糖、黄嘌呤检测等)、燃料电池、食品包装等领域中的应用.结果 通常采用水热合成法制备纳米CeO2.纳米CeO2负载贵金属可制备生物检测催化剂及燃料电池阳极催化剂;纳米CeO2复合金属氧化物可用于制备抗紫外功能的食品包装.结论 纳米CeO2在食品生物化学检测、催化与燃料电池等领域有广阔的研究空间.     

DimensionAR型全自动生化分析仪使用评价

目的：了解 Ｄｉｍｅｎｓｉｏｎ ＡＲ型全自动生化分析仪性能。 方法：用质控定值血清评价仪器的准确性、精密度;用定标液测定线性;用高、低浓度的样本测试携带污 染率。 结果：仪器性能良好;９个项目的相对偏差最低０.０１％,最高３.５％;平均精密度天内为ＣＶ％＝０．５０％, 天间为 ＣＶ＝１. ０８％;基本无交叉感染 结论： Ｄｉｍｅｎｓｉｏｎ ＡＲ型全自动生化分析仪具准确、精密、随机任选的特点,适于中等规模医院使用。     

一株高产细胞表面植酸酶酵母的产酶性质

对一株高产细胞表面植酸酶酵母突变株WZ 4菌的细胞植酸酶性质进行了研究,结果表明:该酶的最适pH为5,最适温度为50℃,Km为0.666mmol/L。此外,WZ 4菌产植酸酶受控于培养基中的磷的质量浓度,最大产酶磷的质量浓度为50mg/L,当磷的质量浓度大于0.1g/L时产酶被完全阻遏。     

一株产L-瓜氨酸微生物菌株的鉴定

对实验室保存的一株产L-瓜氨酸的菌株进行了生理生化与分子生物学鉴定,结果表明该菌为季也蒙毕赤氏酵母。     

基于生物化学原理空调房间的人体散热量分析

根据生物氧化原理对人体能量代谢进行了分析,指出人体同化和异化作用相等条件下,每小时消耗1mol O_2或产生1mol CO_2的散热量为132.7537W。通过测量人体的耗O_2量或CO_2产生量可以计算出人体散热量。根据一组人体CO_2产生量计算出人体相应的散热量并与试验值进行对比,两者十分吻合。给出人体的热平衡关系和能量守恒关系式。