非程序升温色谱法分析CO/CO2加氢反应混合物

在非程序升温单桩色谱仪上，采用双柱温法对ＣＯ／ＣＯ２加氢反应混合物进行在线分析，设置条件为３ｍ长的色谱柱ＧＤＸ－４０３，柱前压和检测温度固定不变，氢气为载气，ＴＣＤ为检测器，结果表明：在柱温３１３Ｋ，可以分析ＣＯ、ＣＨ４、ＣＯ２。在柱温３６８Ｋ，可以分析Ｈ２Ｏ和甲醇。通过计算反应前后２组物质浓度的变化，可以快速、准确评价催化剂的活性和选择性。     

改造现有工艺回收地面计量天然气

为解决牙哈作业区A区块3口井在见水后含水上升较快、单井产液量增加、现有装置处理能力不足,导致A区块所有生产井不能全部进站的问题,同时为提高最终采收率,需要延长见水时间,见水后控制含水的上升趋势。这就要求掌握含水井的生产动态,而现有装置无法对单井的含水进行计量,塔里木油田公司牙哈作业区A区块建造集中试采装置,文章介绍了改造前后的工艺流程及改造效果。     

Co-metabolic and biochar-promoted biodegradation of mixed PAHs by highly efficient microbial consortium QY1

Polycyclic aromatic hydrocarbons (PAHs), typical representatives of the persistent organic pollutants (POPs), have become ubiquitous in the environment. In this study, a novel microbial consortium QY1 that performed outstanding PAHs-degrading capacity has been enriched. The degradation characteristics of single and mixed PAHs treated with QY1 were studied, and the effect of biochar on biodegradation of mixed PAHs and the potential of biochar in PAHs-heavy metal combined pollution bioremediation were also investigated. Results showed that, in single substrate system, QY1 degraded 94.5% of 500 mg/L phenanthrene (PHE) and 17.8% of 10 mg/L pyrene (PYR) after 7 days, while in PHE-PYR mixture system, the biodegradation efficiencies of PHE (500 mg/L) and PYR (10 mg/L) reached 94.0% and 96.2%, respectively, since PHE served as co-metabolic substrate to have significantly improved PYR biodegradation. Notably, with the cooperation of biochar, the biodegradations of PHE and PYR were greatly accelerated. Further, biochar could reduce the adverse impact of heavy metals (Cd²⁺, Cu²⁺, Cr₂O₇^2?) on PYR biodegradation remarkably. The sequencing analysis revealed that Methylobacterium, Burkholderia and Stenotrophomonas were the dominant genera of QY1 in almost all treatments, indicating that these genera might play key roles in PAHs biodegradation. Overall, this study provided new insights into the efficient bioremediation of PAHs-contaminated site.     

环介导等温扩增技术(LAMP)检测人星状病毒方法的建立及其在再生水检测中的应用

为快速高效地检测人星状病毒,建立了一种新的试验方法——环介导等温扩增技术(loop-mediated isothermal amplification technology,LAMP),并对人星状病毒LAMP反应条件进行了优化.结果表明,镁离子终浓度为4 mmol·L-1、甜菜碱终浓度为1mol.L-1的25μL体系下...     

Development of a static test apparatus for evaluating the performance of three PM2.5 separators commonly used in China

PM_(2.5) separator directly affects the accuracy of PM_(2.5) sampling.The specification testing and evaluation for PM_(2.5) separator is particularly important,especially under China's wide variation of terrain and climate.In this study,first a static test apparatus based on polydisperse aerosol was established and calibrated to evaluate the performance of the PM_(2.5) separators.A uniform mixing chamber was developed to make particles mix completely.The aerosol concentration relative standard deviations of three test points at the same horizontal chamber position were less than 0.57%,and the particle size distribution obeyed logarithmic normal distribution with an R~2 of 0.996.The flow rate deviation between the measurement and the set point flow rate agreed to within ± 1.0% in the range of -40 to 50℃.Secondly,the separation,flow and loading characteristics of three cyclone separators(VSCC-A,SCC-A and SCC112) were evaluated using this system.The results showed that the 50% cutoff sizes(D_(50)) of the three cyclones were 2.48,2.47 and 2.44 μm when worked at the manufacturer's recommended flow rates,respectively.The geometric standard deviation(GSD) of the capture efficiency of VSCCA was 1.23,showed a slightly sharper than SCC-A(GSD = 1.27),while the SCC112 did not meet the relevant indicator(GSD = 1.2 ± 0.1) with a GSD = 1.44.The flow rate and loading test had a great effect on D_(50),while the GSD remained almost the same as before.In addition,the maintenance frequency under different air pollution conditions of the cyclones was summarized according to the loading test.     

适应性环境管理模式在大型赛事筹备中的应用（上）——管理模式构建

针对我国环境保护行政管理存在的直线式管理、缺乏弹性等问题,将适应性管理的理论和方法引入环境管理领域,提出适应性环境管理的概念和管理模式,通过构建基于AHP（层次分析法）的适应性环境管理绩效评估体系,在环境管理中对各项任务进行跟踪管理和绩效评估,反馈于阶段性目标的制定,从而灵活调整工作方案,最大限度地降低环境管理中的不确定性,保证环境管理总目标的达成.     

玉米芯生产单细胞蛋白研究——生产SCP的Candida Boidinii No.2201诱变菌株的筛选

本研究对用玉米芯酸水解液生产ＳＣＰ的ＣａｎｄｉｄａｂｏｉｄｉｎｉＮｏ．２２０１诱变株进行了初步筛选,选出了诱变菌株Ｙ１０８,其产量比原菌种增加２５％左右,达到了２８ｇ／Ｌ～３０ｇ／Ｌ,产品粗蛋白含量为３５％。初步研究表明,利用诱变株Ｙ１０８生产ＳＣＰ有可能成为未来较好的饲料蛋白添加剂     

《汶川地震建筑物震害遥感解译图集》的编制

2008年四川汶川8.0级地震造成了惨重的人员伤亡和巨大的经济损失。在震后灾害监测、应急指挥与抢险救援、灾害调查、损失评估、灾民安置、恢复重建以及地震科学研究等工作中,遥感技术发挥了重要作用。《汶川地震建筑物震害遥感解译图集》根据地震后地震现场建筑物震害遥感比对科学考察资料和震害遥感资料分析处理结果,按照科学性、知识性和资料性的编制原则编制而成。主要包括汶川大地震发生的地震地质、地势和社会环境,灾区遥感影像获取、建筑物震害影像特点与实际震害表现、震害遥感定量评估方法、汶川大地震灾区(Ⅷ度及以上地区)震害遥感定量评估模型,以及主要城市和乡镇震害遥感影像和震害评估结果等。     

淮河流域多闸坝河流COD综合衰减系数测算

提出在多闸坝河流上，利用枯水期断面化学需氧量同步监测数据测算COD综合衰减系数的方法，用该方法测算河南省辖河流域部分河流COD综合减系数在0．08－0．341/d。并用实际监测结果进行检验。     

地表参数对面源大气预测结果的影响性分析研究

为了研究地表参数取值对AERMOD中面源模拟预测浓度值的影响,文章通过改变粗糙度、反照率和波文比的取值来进行不同地表参数与预测结果的相关性分析,同时采用正交试验法来研究不同地表参数对预测结果的敏感性.相关性分析表明,不同地表参数和预测结果有着很高的相关性.敏感性分析表明,反照率数值变化对小时最大落地浓度的敏感性最大,粗糙度数值变化对日均和年均最大落地浓度的敏感性最大.通过研究可以看出在面源大气预测过程中合理选择地表参数值是准确预测的前提.