INVESTIGATION ON THE DITERMINATION OF METAL IRON IN SLAG CONTAINING VANADIUM TITANIUM ( IODIN-ALCOHOL FOR SEPARATION EDTA FOR DITERMINATION)

Great accuracy can be obtained when metal iron is determined with bromine for dissolution K2Cr2O7 for titration. Unfortunately, harmful substances such as Br2, CH3OH, HgCl2, K2Cr2O7 etc. must be used when this method. But these harmful substances can be avoided when I2-C2H5OH is used for dissolution and EDTA for titration as discussed in this paper. As this method is simple with good reapetability, it is suitable for the diterminat ion of metal iron slag containing V.Ti, in slag containing high Ti, and in common slags.     

棉属种间杂交的研究

适宜的温度(25～30℃)、营养生长与生殖生长协调(盆栽)、柱头上涂蔗糖溶液(35%)、苞叶内外点滴赤霉素(50ppm)四者配套,是克服棉花种间杂交不可交配性的关键,其中温度是关键的关健。采用3个栽培种、1个海陆杂种、20个野生种,进行野生种与栽培种或野生种与野生种杂交,得到28个组合。四倍体陆地棉(2n=4x=52)与二倍体野生棉(2n=2x     

EXPERIMENTED INVESTIGATION OF EFFECT OF THE INCLINATION ON HEAT TRANSFER ON TUBE

The present paper discribes experiment research of effect of the inclination on heat transfer on 9 kinds of plain tubes in atomosphere, working fluids are distill water and ethanel. Experinent result show very obvious effect of inclination of pool boiling heat transfer. The larger heat transfer increases, the larger the inclination does. The correlation obtained on 524 experiment data can be used for reference to engineering design in prospect of heat transger coefficient.     

安徽省储藏物昆虫调查研究

通过对安徽省各类农产品仓库、加工厂等场所的调查,采集各类储藏物昆虫标本共1866份,经过整理、分类鉴定共发现储藏物昆虫143种,分析归纳了安徽省常见储藏物害虫和不同储藏环境中主要害虫,并对调查中发现的问题提出了相应防治建议.     

INVESTIGATION ON THE FORMATION OF SINE IMAGE OF RECTANGULAR GRATING

OTF of a diffraction - limited incoherent imaging system is equivalent to a linear filter of the spectrum of the intensity when thesystem focusing error is very serious,we derive a formularand these results of calculation agree with the experimental data, which is exact explanation to the sine image of rectangular grating.     

AN INVESTIGATION ON NONLINEAR SHEAR MODEL OF DISCONTINUITY

In this paper, on the base of idealizing the asperities of discontinuity by statistical methods, the yield rule of discontinuity is considered as more practical nonlinear model from the other way(which is different from refcrence[1]. and set up the physical equatation by using the physical meanings of the model. Then the obvious equatations of yield rule and clilatancy of discontinuity is given, in order to evaluate the practical shear strength of discontinuity. In addition, the destroy state of discontinuity during shearing is described     

粮层阻力计算公式的分析比较

本文汇集了粮层阻力的主要计算公式，指出各公式的来源、相互关系及使用范围，对这些公式的计算值进行了比较，分析了各因素对粮层阻力的影响，指出计算粮层阻力时应注意的问题。     

微生物对小麦及其加工品污染的调查分析

重点对河南省郑州、开封两地区的小麦及其制品中的各类微生物进行了调查研究，并对各种情况下不同种类微生物分布情况进行了总结，为合理减少微生物污染，保证粮食安全卫生提供了必要的理论依据。     

THE INVESTIGATION AND DEVELOPMENT OF CONTROLLED TEMPERATURE SYSTEM WITH MICROCOMPUTER

This paper introduces a controlled temperature system in which the silicon controlled rectifier is controlled by a TP-801 microcomputer. A common-used PID expression is usually applied to control temperature, but it is necessary to adjust three parameters, making the operation quite inconvenient. This system adopts the measurement of a simplified expanded-critical proportion, only one parameter is necessarily adjusted. In addition, the method of digital triggering is applied so that the D/A transfer and silicon adjuster are omitted, thus decreasing the cost and increasing the reliability of operation. This system has higher precision of control and better degree of linearity of temperature increment or decrement.     

稻谷品种质量调查与分析研究

对在广东地区抽取的439个样品共201个品种的稻谷进行质量等级研究，结果表明大部分品种的稻谷质量与国标优质稻谷标准存在一定差距；不同产地的同一品种稻谷质量也不一定相同。对达不到高等级质量要求和同一品种不同产地质量不一致的因素进行了分析。     

浅圆仓玉米破碎率调查报告

本文通过对浅圆仓储存玉米的破碎率进行调查，分析了输送流程中各种输送设备对玉米破碎率的影响程度；通过对入储浅圆仓后的玉米破碎率高低的分布作较详尽的调查，指出玉米破碎导致脂肪酸值快速升高，影响了玉米储存安全。文章提出了影响玉米破碎率的因素和减少破碎率的建议。     

低酚棉子蛋白乳化容量的研究

本文以低酚棉子蛋白为研究材料,采用电导法测定低酚棉子蛋白乳化油脂时的乳化容量。结果表明,低酚棉子蛋白在乳化时其耗油量与蛋白质含量呈线性相关.适合方程y=a+bx,线性回归系数b的值即为低酚棉子蛋白的乳化容量。中性蛋白酶水解低酚棉子蛋白,发现其乳化性能的变化为,酶水解使非贮存蛋白的乳化容量呈下降趋势;酶水解使贮存蛋白在水中的溶解度显著增加,其乳化容量先下降而后又趋上升。     

储粮害虫图像的灰关联分析方法研究

对储粮害虫进行实时监测是非常必要的，其中基于图像识别的检测是目前研究较多的一种方法。本文提出了一种基于灰关联分析的图像边缘检测的新算法，并将其应用于储粮害虫图像的边缘检测，计算表明，该方法能有效地检测粮虫图像的边缘信息。     

几种害虫诱捕方法应用效果的调查

根据常见储粮害虫的生活习性设计出几种习性诱杀法并对其应用效果进行调查研究,结果证明习性防治是适合我省小型房式仓的一种有效的、经济的、无公害的害虫防治方法。     

福建省储藏物螨类调查

对福建省２７个县、市、区的１１０个单位的储藏物进行螨类的种类、分布、危害及人出率帛样调查研究,查清了福建省储藏物螨类种类５７种,录属３个亚目,１９个科,３６个属。其中属国内瓣记录７种,常见优势螨９种,主要害螨４种。其分布广,遍布全省。危害储藏物达４５种,且较严重。     

A RESEARCH OF THE INFLUNCE OF RARE-EARTH ELEMENT ON THE THERMAL FATIGUE BEHAVIOR OF CAST IRON

It is known that cylinder heads, exhaust manifoids, ingot molds, etc. are often failed resulting from thermal fatigue. For this reason, the influence of RE on the thermal fatigue behavior of cast iron was studied by measn of a thermal fatigue test unit with completely constrained strain developed by ourselves. The test results shown that RE can improve the thermal fatigue resistance of cast iron greatly when residual RE contents surpass a critical value. This value is 0.04-0.045% for light Rare-Earth, and 0.045-0.05%; for heavy Rare-Earth. Further more, the relationship between RE and the thermophysical and mechanical properties of cast iron which have influence on thermal fatigue resisteance was also discussed.     

充氮储藏对大豆老化劣变影响的研究

研究了充氮气调储藏对大豆老化的影响。控制氮气体积分数分别为98%和78%,比较了水分含量,储藏温度和储藏时间对大豆发芽率、浸出液电导率、丙二醛(MDA)含量和过氧化物酶(POD)活性的影响。结果表明,充氮储藏和普通储藏的大豆种子在储藏过程中发芽率会逐渐下降,水分12.2%的大豆在20℃储藏180d时发芽率保持在85%以上,而高温(30℃)高水分(14.9%)储藏大豆储藏至90d时,发芽率已降至零,种子完全丧失活力;充氮储藏的大豆浸出液电导率和丙二醛含量均比普通储藏的对照组大豆低,根据相关性分析,发芽率、电导率、丙二醛(MDA)和过氧化物酶(POD)存在极显著或显著相关性。充氮气调储藏能在一定程度上延缓大豆在储藏过程中的老化。     

折线型屋架平房仓不同部位温度变化研究

通过对仓房仓顶内外、仓房南面和西面仓墙内外及仓内西南、东北角及正中间和粮堆表上层等部位安装数字式测温电缆,经过10个多月的跟踪检测,初步摸清了环境温度对折线型屋架平房仓及储粮表上层的影响情况。     

7种植物提取物对赤拟谷盗种群形成抑制作用的研究

选用７种植物提取物,分别设置８００ｐｐｍ,４００ｐｐｍ,２００ｐｐｍ,１００ｐｐｍ,５０ｐｐｍ５个浓度梯度,对赤拟谷盗进行试验。结果表明,对赤拟谷盗种群形成抑制效果最好的是８００ｐｐｍ的桔皮提取物,抑制率为９３．４％,其次是８００ｐｐｍ的脐橙提取物,抑制率为８５．７％。８００ｐｐｍ的一年蓬花瓣,肉桂,艾蒿,山萘,鱼腥草提取物对赤拟谷盗种群形成抑制率依次为７８．１％,７６．４％,７４．４％,６７．８