厌氧-好氧周期循环条件下厌氧磷吸收现象

在厌氧-好氧周期循环反应器中，稳定运行阶段出现规律性的与生物除磷理论相悖的厌氧磷酸盐吸收现象．为此，从厌氧吸收磷、有机物的效果及两者之间的关系、厌氧有机物吸收能量来源等角度，对厌氧吸磷机理进行探讨．采用乙酸钠为主要有机基质，当进水P／COD从2／100增加到4／100，厌氧阶段磷酸盐的去除率一直稳定在50％-70％．在排除化学除磷的情况下，实验结果表明厌氧吸磷与厌氧吸收乙酸盐基质直接相关，而糖原又是有机基质吸收与胞内聚合物储存过程重要的甚至唯一的能量来源．通过对厌氧磷酸盐、有机物、糖原以及混合液中pH值变化的测定分析，初步推测厌氧吸收磷酸盐是当胞内无可利用的磷源时，糖原分解对磷酸盐的需求，并通过敏感于pH值变化的磷载体蛋白，将胞外液相中的无机磷酸盐运输到细胞内部。     

陕西镇安三叶木通野生资源调查

对陕西省镇安县三叶木通的生长情况进行了资源调查．从其生物学特性、分布状况等方面说明了三叶木通在镇安县生长的适宜性和可开发利用性,并阐述了三叶木通在镇安县开发利用的现状及展望．     

生物节水技术在华北半湿洞偏旱区的试验研究

依据生物节水的机理与节水技术途径，通过生物节水技术在华北半湿润偏旱区的试验，确立了生物节水的技术体系。     

Temporal-spatial dynamics of distribution patterns of microorganism relating to biological soil crusts in the Gurbantunggut Desert

Biological soil crusts serve as an important biological factor contributing to the sand fixation. This study was conducted to investigate the temporal-spatial variability of microorganism in crusts relating to locations, soil layers of sand dunes and seasons. At moss-dominated inter-dune areas, higher soil nutrient and water concentrations were likely to maintain the microbial activities. Bacteria showed the highest capabilities of settlement and growth in inter-dunes in both spring and autumn. Soil water content reached the highest value in soil crusts in the inter-dune areas, especially in spring. Variations of quantities of actinomyces and fungi basically showed the consistent trend in different locations of sand dunes. With the deepening of soil layers, vertical distribution of quantities of each microorganism group showed different characteristics because environmental factors fluctuated in both spring and autumn. Among different microorganism groups, bacteria were predominant, actinomyces the next and fungi the least in both spring and autumn in all soil layers （0-20 cm）. The proportion of bacteria and soil water content were higher in spring than those in autumn in all soil layers （0-20 cm）. No consistent trends were found in actinomyces and fungi. The results showed that the quantities of microorganisms were significantly positive correlated with organic matter content, soil water content, total N, total P, available P, available K, pH, electrical conductivity, total salt content,catalase, urease, phosphatase and alkaline phosphatase.     

前瞻性定制化学品

定制化学品的市场需求要求定制化学品制造商不断进行调整，新颖的精细化学品以及新工艺、创新技术也不断涌现。本文介绍了近两年新研究开发的富有魅力的精细化学品和关键技术。     

太赫兹电磁波在生物医学领域中的应用原理及进展

结合THz电磁波的特点和相关理论综合介绍了THz电磁波在生物医学领域的应用情况和进展状况，并且阐述了THz在生物医学领域所面临的问题及相关技术的发展．     

Relationship between the exposure dose of high intensity focused ultrasound and the heated necrosis element

Heated necrosis element of tissues is the basis for treating tumor by high intensity focused ultrasound (HIFU), so study on the relationship between the HIFU exposure dose and the heated necrosis element of tissues is of great significance for both HIFU clinical applications and basic research. Using Pennes and Rayleigh formulae the relationship between the exposure dose of an annular focused transducer and the heated necrosis element (I.e. Biological focused region) in a bovine liver in vitro at a depth of 2 cm is simulated in an exposure dose range with radiation sound intensity of 7000～25400 W/cm2 and exposure time of 0～20 s. The theoretical results appear to be in quite good agreement with the experimental ones. It is shown that on the basis of existing theories the heated necrosis element produced by HIFU exposure can be predicted. The deviation of the theory from the experiments under higher exposure dose has also been discussed.     

基于苯乙酮的肟醚-酰胺类化合物的合成及生物活性研究

合成了10个新型的肟醚-酰胺类化合物，所合成的新化合物经^1H NMR、元素分析和MS进行了结构确证．初步的生物活性测定表明新化合物普筛时Nb对黄瓜灰霉病菌，Ni对油菜菌核病菌及粘虫有100％的抑制活性。     

厌氧生物法处理活性染料废水的研究

模拟中温厌氧消化条件,对模拟染料废水的厌氧生物处理进行了研究.结果表明:对可溶性的偶氮活性染料处理效果较好;当污泥浓度在2~4gVSS/L,反应时间为22h,脱色率和COD去除率分别达到90%和70%左右;染料的浓度在0~200mg/L时几乎没有抑制,染料浓度达到2000mg/L时,属重度抑制.废水紫外可见光吸收光谱表明:在厌氧处理过程中,染料分子结构发生了明显的变化.     

硫代磷酰肼席夫碱Mn(Ⅱ)、Ni(Ⅱ)、Fe(Ⅱ)配合物的合成与生物活性

合成了O，O’-二乙基硫代磷酰肼5-溴水杨醛席夫碱的Mn(Ⅱ)、Ni(Ⅱ)、Fe(Ⅱ)配合物，并用元素分析、UV、IR及摩尔电导对它们进行了表征．测定了化合物对水稻幼苗细胞存活率及POD活力的影响．