分光光度法测定黄磷尾气中总磷

实验研究了溴化硝酸吸收－分光光度法测定黄磷尾气中总磷含量的方法，总磷回收≥97%,方法检测限可达0.2μg/mL.     

氮肥工业与21世纪的生物能源

介绍近年来美国生物能源的开发进展情况及其先进的支撑系统，提出如何使我国氮肥工业在发展我国生物能源中起促进作用。     

小型全内腔脉冲Ar~＋激光管的研制

介绍一种小型全内腔脉冲Ａｒ＋激光管的设计和结构。并对不同阴极，放电管直径，激励电压及Ａｒ气压等对输出功率及激光管寿命的影响作了一系列的实验，试制出结构简单，使用方便，价格便宜的有一定实用价值的小型全内脏脉冲Ａｒ＋激光管。     

Simulation of water and nitrogen dynamics in soils during wastewater applications by using a finite-element model

A mathematical model was developed to simulate water movement, mass transport, and nitrogen transformations in soils during wastewater applications. The model is one-dimensional and based on the Galerkin finite-element method. The submodel of mass transport of nitrogen incorporates the convection-dispersion processes of ammonium and nitrate nitrogen, nitrification, denitrification, ammonium exchange and uptake of ammonium and nitrate ions. The accuracy and validity of the proposed model was examined by comparison with an explicit-implicit finite-difference model results. The model was used for simulation of water and nitrogen dynamics during wastewater application in homogeneous and multi-layered soils under different N concentration, rate, duration and scheduling of application.     

LabWare树立全球LIMS的典范

本文站在技术和应用的角度，简要介绍美国LabWare公司LIMS产品的功能，对其特点进行分析，其中，该系统的先进性和可组态性，实施的准时、概算的可控制，以及成功的业绩，对中国的用户将具有很大的吸引力。     

液氮温区同轴脉冲管制冷机的实验研究

脉冲管制冷机冷头朝上布置可以使制冷机与超导器件的耦合更方便 ,但对G -M型脉冲管制冷机 ,重力会对这种布置方式产生不利影响。对双向进气型脉冲管制冷机 ,直流和耦合传热会共同影响脉冲管制冷机的性能。介绍了液氮温区G -M型同轴脉冲管制冷机的实验结果 ,主要研究了蓄冷器温度分布和重力对脉冲管制冷机性能的影响     

Effects of storage time and chemical preservatives on the total volatile basic nitrogen content in chilean mackerel (Trachurus murphy) prior to fish meal production

Total volatile basic nitrogen (TVB-N) as a measure of protein degradation and total microbial counts or stored raw mackerel (Trachurus murphy), which had been treated with chemical preservatives, were compared with the TVB-N and microbial counts of untreated fish. In unpreserved fish, decomposition of fish protein was rapid. Treatment of mackerel with acetic (1000-5000 μg kg^?1), which was the most effective of the parameters studied, approximately halved the rate of increase in TVB-N compared with the untreated samples. Changes in the total microbial counts presented a similar trend.     

大规模集成电路浮栅ROM器件总剂量辐射效应

提出了一种大规模集成电路总剂量效应测试方法:在监测器件和电路功能参数的同时,监测器件功耗电流的变化情况,分析数据错误和器件功耗电流与辐射总剂量的关系.根据该方法利用60Co γ射线进行了浮栅ROM集成电路(AT29C256)总剂量辐照实验,研究了功耗电流和出错数量在不同γ射线剂量率辐照下的总剂量效应,以及参数失效与功能失效时间随辐射剂量率的变化关系,并利用外推实验技术预估了电路在空间低剂量率环境下的失效时间.     

输气管道投产置换过程气体混合规律研究

目前国内输气管道置换工艺主要依据人工经验进行，存在较大的盲目性，导致天然气管道投产成本较高，安全风险较大，有必要对输气管线安全投产工艺进行科学、系统的研究，实现输气管道的安全、高效、经济投产模式。文章讨论了现有置换工艺中不同的置换方式，认为不加隔离器的置换方法具有置换效率高、费用低以及安全可靠等优点，是一种有前途的新工艺、新方法。同时，为确保置换过程的安全性，针对置换过程中注氮量确定的盲目性问题，采用模拟试验方法，研究了天然气与氮气、氮气与空气混合段在不同流速和背压下长度的变化规律，从而为确定合理的用氮量提供了理论依据。