Leachate Generation of Solid Waste Sanitary Landfill

The paper analyses the factors affecting leachate generation for landfill,and discusses the methods of calculation for leachate generation and indicates the effective ways to control leachate pollution on environment.     

培养大学生创造能力的研究

本在探讨人才造能力价值和科学创造一般发展过程的基础上,从２１世纪人和素质的特点及要求出发,从六个方面提出了培养大学生创造能力的途径。     

荞麦ARF基因家族的鉴定及生物信息学分析

生长素响应因子(auxin response factor, ARF)基因应答了生长素信号,在植物生长发育中具有重要的调控作用。以荞麦基因组数据库为基础,利用BlastP比对程序共鉴定了21个荞麦ARF基因,并对其基因结构、编码蛋白理化性质、保守结构域、保守基序、亚细胞定位、潜在磷酸化位点及系统进化关系进行了分析。基因结构分析表明,21个荞麦ARF基因均含有内含子,且不同基因间内含子数目存在较大差异。保守结构域分析显示,21个ARF蛋白均含有保守的B3和ARF结构域,部分ARF蛋白还含有Aux/IAA结构域。蛋白保守基序分析表明,21个ARF蛋白共有10个保守基序,基序长度在13~55个氨基酸之间。亚细胞定位分析表明,大多数ARF蛋白定位于细胞核,个别定位于叶绿体。潜在磷酸化位点分析显示,所有ARF蛋白均含有潜在的丝氨酸(Ser)、苏氨酸(Thr)和酪氨酸(Tyr)磷酸化位点,但各蛋白的不同磷酸化位点的数目差异较大。系统进化分析表明,21个ARF基因可以分为Ⅰ、Ⅱ、Ⅲ三个亚家族,其中,Ⅰ亚家族可以进一步分为Ⅰa和Ⅰb两个家族,Ⅱ亚家族可以进一步分为Ⅱa和Ⅱb两个家族。研究结果为进一步克隆荞麦ARF基因及深入研究它们在荞麦中的功能提供了参考。     

赤霉酸在梨中的残留消解动态研究

为了制定赤霉酸在梨上的安全使用标准,将2.7%赤霉酸膏剂按37.5 mg/果进行田间试验,应用液相色谱法进行残留量分析检测,研究了赤霉酸(GA3、GA4+7)在梨中的残留动态,结果表明,赤霉酸在梨中的消解速度较快,半衰期为9.8~13.6天。赤霉酸在梨中的残留量随着时间延长而递减,符合一级反应动力学方程。     

Assessment of Gas Utilization for Landfill

In order to fulfill the landfill gas's energizing and protect the environment, many measures to control and exploit the landfill gas are taken. In this paper, a targets system and an analytic hierarchy process method which assesses the measures are put forward based on the systematic impact of environmental,economical and social benefits. It is useful to make a decision reasonably.     

Greenhouse Gas Control for Landfill

Landfill site is one of the most important sources of greenhouse gas emissions. The available information shows that greenhouse gas emissions from the landfill sites are 40% 50% of the total greenhouse gas emissions in America. The greenhouse gas output is computed in the text and the conclusion that the main components of yielding gas are food and paper is made. Some measures of cutting greenhouse gas yielding are suggested. At last it points out that some research about these measures should be made in the future in China.     

柴油机排气歧管流固耦合分析

联合AVL-Fire与有限元分析软件对某柴油机排气歧管进行了温度场、热应力分析。首先利用AVL-Fire对排气歧管做内外流场CFD计算,得到排气歧管内外表面的热边界条件,即流体温度和换热系数,将该计算结果作为排气歧管的热边界条件并用有限元软件计算出排气歧管的温度场和热应力。     

食用菌增产剂Ⅰ号在香菇栽培中的应用

为探讨食用菌增产剂Ⅰ号在香菇栽培中的应用效果，研究了食用菌增产剂Ⅰ号对香菇发菌、出菇以及后期养分利用效率的影响。结果表明：栽培料中添加食用菌增产剂Ⅰ号可以促进菌丝生长健壮，减少病菌感染，提早出菇和增加产量，降低病（畸）菇率，提高品质，添加量以0.2%最好。在香菇出菇后期通过在食用菌增产剂Ⅰ号中浸泡菌筒也可增加出菇数量，极显著提高产量，并缩短采菇期，浸泡时食用菌增产剂Ⅰ号的添加量以1：800（质量比）为宜。     

The occurrence and antibiotic resistance of motile Aeromonas in livestock

The present study was carried out to assess the prevalence of motile Aeromonas spp. in the faeces of clinically healthy sheep, cattle and horses and evaluate their susceptibility to some anti-microbial agents. Rectal swabs from 120 sheep, 85 cattle and 20 horses were examined for Aeromonas species using alkaline peptone water (pH 8.4) as the enrichment medium and Aeromonas Selective Agar containing 5 mg/l ampicillin as the isolation medium. Identification and antibiotic resistance of motile Aeromonas strains was performed using Gram Negative Enteric ID panel. Motile aeromonads were isolated from 12 (10%) sheep, 7 (8.2%) cattle and 1 (5%) horse. Of these 20 aeromonad isolates, 13 were A. caviae, 6 were A.sobria and 1 was A. hydrophila. Aeromonas species in the faeces of livestock might pose a public health problem for humans who are in direct contact with contaminated animals. However, further studies should be performed on aeromonads relating to their transmission between animals and humans.