低压长袋脉喷收尘器在5000t/d熟料生产线的应用

本文介绍了低压长袋脉喷收尘器在某水泥厂5000t/d熟料生产线水泥窑尾的设计概况及成功应用。     

环境影响评价中应用ISO14000标准若干问题探讨

从法律依据、导向功能、对象、污染预防、相关方、环境管理等方面探讨环境影响评价与ISO14000的关系及注意点，为企业的环境管理指明方向。     

吸附法在室内空气净化中的应用

首先分析引起室内空气污染的原因,在阐述吸附机理的基础上对吸附法应用于净化室内空气的优点及存在的问题进行了探讨,并对今后的研究重点和发展方向提出了几点建议。     

Response of successive three generations of cotton,bollworm,Helicoverpa armigera (Hübner),fed on cotton bolls under elevated CO_2

The growth,development and consumption of successive three generations of cotton bollworm,Helicoverpa armigera(Hübner),fed on cotton bolls grown under elevated CO_2(double-ambient vs.ambient)in open-top chambers were examined.Significant decreases in protein,total amino acid,water and nitrogen content and increases in free fatty acid were observed in cotton bolls.Changes in quality of cotton bolls affected the growth,development and food utilization of H.armigera.Significantly longer larval development duration in three successive generations and lower pupal weight of the second and third generations were observed in cotton bollworm fed on cotton bolls grown under elevated CO_2.Significantly lower fecundity was also found in successive three generations of H.armigera fed on cotton bolls grown under elevated CO_2.The consumption per larva occurred significant increase in successive three generations and frass per larva were also significantly increased during the second and third generations under elevated CO_2.Significantly lower relative growth rate,efficiency of conversion of ingested food and significant higher relative consumption rate in successive three generations were observed in cotton bollworm fed on cotton bolls grown under elevated CO_2.Significantly lower potential female fecundity,larval numbers and population consumption were found in the second and third generations of cotton bollworm fed on cotton bolls grown under elevated CO_2.The integrative effect of higher larval mortality rate and lower adult fecundity resulted in significant decreases in potential population consumption in the latter two generations.The results show that elevated CO_2 adversely affects cotton bolls quality,which indicates the potential population dynamics and potential population consumption of cotton bollworm will alleviate the harm to the plants in the future rising CO_2 atmosphere.     

苯丙氨酸解氨酶的分子生物学研究进展

苯丙氨酸解氨酶 (Ｐｈｅｎｙｌａｌａｎｉｎｅａｍｍｏｎｉａｌｙａｓｅ ,ＰＡＬＥ .Ｃ .4.3 .1.5 )是一种只存在于植物及微生物细胞内的酶 ,主要分布于高等植物如小麦、大豆、玉米、土豆及酵母[1] 、真菌[2 ] 、链霉菌[3]中 .在 ｐＨ 8.8时 ,ＰＡＬ催化苯丙氨酸脱氨生成肉桂酸和氨 ,当过量的氨存在 ,如 ｐＨ 10时 ,ＰＡＬ催化肉桂酸和氨 ,氨化加成生成Ｌ 苯丙氨酸 (Ｌ ｐｈｅｎｙｌａｌａｎｉｎｅ) .利用ＰＡＬ这种逆向催化特性转化肉桂酸生产Ｌ Ｐｈｅ ,已在国内外投入商业规模开发 ,成为当前生物化工领域研究与开发的热点 .Ｌ Ｐｈｅ是人…     

大宗散货港口大气环境容量规划研究

以典型煤炭泊位港区为例，结台环境空气质量控制目标，从区域环境出发进行宏观规划，建立基本的污染源，地区污染气象和污染物扩散浓度的动态响应关系及多源优化模型，研究提出了一种比较适合以营运大宗散货为主的交通港口区域总悬浮微粒(TSP)环境容量规划和计算方祛。     

氧化塘底泥与稻草堆肥过程中养分变化研究

氧化塘污泥中含有较丰富的各种氮、磷养分,将氧化塘污泥堆肥处置后农用是一种有效的处置方式。采用静态强制通气堆对氧化塘底泥进行堆肥处理,对堆肥过程中氮磷的变化规律进行了研究。试验结果表明,堆肥过程中总氮含量下降了17.5%,总磷含量上升了47.0%,堆肥的时间以49d左右为宜。     

钢铁工业区周边农业土壤中多环芳烃(PAHs)残留及评价

对某大型矿业企业周边农业土壤中多环芳烃(PAHs)残留量进行了调查。结果表明,PAHs总残留量范围为312. 2~27 580. 9ng·g-1,且以4环以上多环芳烃组分为主。所有土样中均检出PAHs,单一污染物以芘、艹屈、荧蒽、苯并[a]芘、蒽、菲、苯并[a]蒽、苯并[k]荧蒽、茚并[1,2,3 cd]芘、苯并[g,h,i]苝为主。PAHs残留量与有机质含量相关性较好。不同样区土壤PAHs残留量受常年风向影响明显。以加拿大农业区域土壤PAHs的治理标准值为指标,用内梅罗综合指数法进行评价表明,研究区农业土壤达重污染水平的占37%,中度污染的占19%,轻污染的占25%,另有13%的采样点污染程度处于警戒限,仅有6%的采样点尚处于安全级。     

粘红酵母(Rhodotorula glutinis CIBAS A 1401)苯丙氨酸解氨酶cDNA核心序列的克隆与分析

L苯丙氨酸因其在工业、医药上的重要作用而日益受到人们的重视.苯丙氨酸解氨酶(PAL)生物转化肉桂酸生产L苯丙氨酸成了该领域研究与开发的热点.本文利用简并寡核苷酸PCR法结合cDNA末端快速扩增PCR法,从粘红酵母中克隆了苯丙氨酸解氨酶cDNA核心序列,为克隆其cDNA全长序列及体外表达其活性蛋白奠定了基础.图5参22     

蚯蚓再生能力的研究

将赤子爱胜蚓从特定部位切断，得到有头无尾、无头无尾、无头有尾3种类型18个处理体段，在20℃人工气候箱中培养，观察其再生情况。结果发现，剪切处理后的蚯蚓体段在10d左右开始再生，且从头至尾都有再生能力。但不同体段的蚯蚓再生能力不同，有头无尾、无头无尾的体段再生速度比无头有尾体的要快，其中，无头无尾蚯蚓体段的头部、尾部都可以再生，但尾部再生的速度显著高于头部，剪切后所剩蚯蚓体段的多少对蚯蚓存活率有很大影响所剩的体节数越多，蚯蚓体段的死亡率降低，两者呈正相关关系。