高大平房仓空调控温结合氮气气调对小麦品质的影响

对4个高大平房仓储粮小麦在度夏期间进行空调控温。在此基础上选取2个仓进行氮气气调，研究了单独空调控温以及空调控温结合氮气气调储粮过程中小麦的品质变化情况。研究结果表明：仅单独空调控温时，随着储藏时间的增加，小麦的害虫数量不断增加，而小麦的害虫数量在氮气气调后则开始呈现显著降低的趋势；两种储粮方式下小麦的水分含量、容重和面筋吸水率均随着储藏时间的增加而降低，其中氮气气调的小麦水分含量、容重和面筋吸水率降低程度稍低于仅空调控温的小麦；小麦的色泽、气味和呕吐毒素含量在储藏期间未发现明显改变，表明应用氮气气调未对其产生显著影响。     

相同储藏条件下同年度不同品种小麦品质的变化

选用5个同一生产年度的不同品种小麦,在同一储藏条件下对其容重、水分、面筋吸水量、粘度、降落数值和发芽率等品质指标进行测定,讨论各指标与储藏时间的关系及品种差异对各指标的影响,分析各指标之间的相关性。结果显示:随着储藏时间的延长,小麦容重、水分和粘度的变化趋于稳定,面筋吸水率和发芽率呈降低趋势,降落数值呈增大趋势;不同小麦品种的容重、发芽率变化差异不大;储藏1年后,不同小麦品种的水分、面筋吸水率、降落数值变化差异较大;容重与其它五个指标都存在一定的相关性,这也是选择容重作为小麦等级鉴定的必要性。     

对储藏在竹、木和金属仓中的稻谷储藏品质的比较研究

对相同大小的三种不同类型的粮仓（竹仓、木仓、金属仓）储存的稻谷品质进行了比较研究。记录了储藏期间稻谷的温度、水分、发芽率、害虫感染率和千粒重,并按上述变量对储藏稻谷的品质变化进行了评价。竹、木仓的稻谷从底层到顶层温度逐渐升高。金属仓中粮层间温度出现波动,并观察到最高粮温。三种仓上层的粮食水分都低于中、下层粮食水分。在储藏的头220天里,三种仓型中的粮食发芽率都几乎相同,但在以后的储藏期间,木仓和金属仓中的粮食发芽率迅速降至零。储粮害虫麦蛾主要出现在竹、木仓的储粮上层和金属仓的底层。同时观察到粮食劣…     

房式仓的局部改造与储粮条件的改善

粮仓是粮食储藏主要的仓全保健工具。粮仓的各项基础条件必须符合科学保粮的各种要求。房式仓目前在我国仍占绝大部分,由于结构简单,密闭、防潮、隔热、通风等条件差,给安全储粮造成诸多不利因素。如将一般条件较差的房式仓进行局部改造,提高隔热保温能力,符合科学保管及低温储粮的要求,就能达到理想的储粮效果。     

粮食安全储藏与房式仓保温隔热性能设计改进的探讨

从储粮生态系统控制的角度阐述了粮仓保温隔热性能的重要性和实用性,突出粮仓设计和使用的协调统一;针对新建粮食储备房式仓使用中多数出现仓顶隔热性差、门窗洞口气密性差、仓内粮面温度过高的问题,结合实践经验,对房式仓朝南墙面门窗的设计、保温隔热屋面的设计、仓内地坪适当下挖装粮的设计等进行了探讨,提出了实用性设计方法和"半地下储粮房式仓"新仓型的设计思路.     

对低温储粮品质变化的研究

通过对低温仓和常温仓小麦进行储藏品质指标和食品工艺品质指标的测定，分析研究了低温与储粮品质变化之间的关系。结果表明：低温储藏条件下储粮品质变化小，而常规储藏条件下储粮品质变化较大。     

高大平房仓优化控温对小麦蛋白相关品质的影响

通过对高大平房仓进行仓墙外部保温及仓顶吊顶隔热保温优化改造(18号仓),以普通未进行保温优化高大平房仓为对照(8号仓),研究了天津地区高大平房仓综合改造对不同储藏粮层小麦蛋白相关品质的调控效应。结果表明,小麦储藏1年后,在易受顶层空气影响的上层粮层,试验仓粮堆上层小麦的总蛋白、可溶性蛋白、面筋含量分别较对照仓高出4.44%、9.11%和7.48%,麦谷蛋白/麦醇溶蛋白的比值提高了4.39倍,对照仓的麦醇溶蛋白转变为麦谷蛋白的劣变速度为试验仓的3.12倍。可见,高大平房仓优化改造控温对小麦储藏期间蛋白相关品质的劣变可起到明显的调控作用。     

太阳热反射涂料在高大平房仓中的应用试验

采用太阳热反射涂料对粮仓仓顶外表面和外墙进行涂刷处理,通过试验对比,该涂料具有抗腐蚀性、防渗透性和耐候性,对仓温能起到一定的隔热保温效果,在储粮度夏期间能有效降低仓温和表面粮温上升幅度,与对照仓相比分别能降低5℃以上,从而增加储粮稳定性、延缓粮食品质变化。     

旧粮仓综合改造提升储粮功能研究

为适应粮食流通的发展和粮食仓储管理要求,降低储粮成本,对仓龄超过90年的高大房式仓进行全方位立体式改造,整体提升粮仓功能和储粮性能,旧仓和新技术相结合,实现储粮安全,品质良好,增加储粮效益。     

太阳热反射涂料对仓房温度的影响研究

用太阳热反射涂料对粮仓仓顶外表面进行涂刷处理,通过试验对比,该新型涂料对仓温能起到一定的隔热保温效果,在储粮度夏期间能有效抑制仓温和上层粮温变化,与对照仓相比平均粮温能降低4．9℃。从而增强了储粮稳定性,延缓了粮食品质的变化,为今后进一步推广应用隔热材料改造仓房,实现低温储粮提供了实践经验。     

THE EFFECT OF THE STRESS OF LONGWALL AND STRUCTURE OF COAL ON THE BUMP OF COAL AND METHANE

The problems that the bump of coal and methame in the mine is contraled by the stress of longwall and that the coal and methane bump in the mine is affected by the physical properties of the coal are analysed and discussed through some specific bump cases. It is shown that the compressive stress, the content of the methane of the coal, and the bump of coal and methane are directly affected by the content of the ash and the volatile of the coal.     

GENERAL EXPESSIONS OF COMPUTER OF BASIC PROBLEMS UNDER CONDITIONAL OBSERVTTION OF ADJUSTMENT

This paper presents the general expressions of computer which include(1) calculation of the coefficient of normal equations;(2) calculation of the reduced coefficient;(3) calculation of[PVV];(4) calculation of the cor-relate;(5) calculation of the weight reciprocal(1/P_F)of the function of adju-sted value.Each calculation contains corresponding program of calculation.As a program block,it may be quoted at any time in the course of surveying computation.     

水稻旱种土壤养分问题

本文重点讨论了水稻旱种土壤养分问题.主要阐明:水稻旱种与淹水种植土壤养分的区别、水稻体内三要素的变化、氮素利用状况以及水稻体内养分运转率的区别等.同时提出,水稻旱种与淹水种稻在氮素营养的来源方面差异较大.淹水种稻应增施有机肥料,培肥土壤,而水稻旱种应适当增施一些无机氮肥.     

玉米早熟性的相关和遗传研究

以包含11个早熟自交系的共24个自交系及由它们配成的含有正、反交组合的116个单交组合(1991年)和122个单交组合(1992年)为材料,研究了玉米早熟性及产量与有关性状的相关性、早熟性的遗传特点。结果为单交组合生育期与其小区产量呈正相关,但也有个别组合表现既早熟又较高产的,单交组合生育期与其株高、单株叶数均呈正相关,单交组合单株籽粒产量与株高、行粒数、百粒重呈正相关,与穗行数基本无相关;杂交组合生育期多数介于双亲生育期之间,并稍偏晚熟亲本,早熟的显性度为0.22(1991年)和0.37(1992年),杂交组合F_1生育期与双亲生育期平均敷(x)之间存在显著正相关关系,回归方程为y=-10.9 1.17x;早熟性的正、反交组合之间不存显著差异。     

COMPUTER GENERAL EXPRESSIONS OF BASIC PROBLEMS UNDER ADJUSTMENT OF OBSERVATION EQUATION

This paper presents computer general expressions which include: (1) calculation of the coefficient of normal equation; (2) calculation of the reduced coefficient; (3)calculation of [PVV]; (4)calculation of the correlate; (5) calculation of the weighted reciprocal(1/PF) of the function of adjusted value. Each calculation is written in a corresponding program. As a program block, it may be called anywhere in the course of surveying computation.     

SOME PROBLEMS OF DESERVED RESEARCH IN THE PROCESS OF GAS DESULPHATION

Many factors have influence on gas desulphation,Through theoretical a nalysisof desulphation reaction principle and a lot of experiment and production data,this paper studies withthe emphasis on how to solve some concrete problems about selecting and mixing desulphation solu-tion in order to gain the best economic benefits and environment benefits and social comprehensivebenefits.     

DYNAMIC ANALYSIS OF SPINDLE

In this paper, taking a D1201 spindle as an example, we discuss the dynamic analysis of spindle by using the theory of the complex model, we also analyse the factors which effect the dynamic characterics of spindle and give results which arc reference value to improving the structure of spindle,     

乙烯对叶菜衰老的影响及光对乙烯作用的增效作用

采用气流系统用4ppm乙烯对结球生菜和菠菜分别在光照和黑暗条件下连续处理5天,结果发现:无论在光照和黑暗条件下,与对照相比,乙烯处理均使这两种叶菜的叶绿素和可溶性蛋白质含量减少,使过氧化物酶活力增强;同样乙烯处理,在光照条件下要比在黑暗条件下效果明显;乙烯处理不改变过氧化物酶同工酶酶谱,但使结球生菜可溶性蛋白质区带数目由对照的5条增加到7条;光照条件下乙烯处理的结球生菜叶片锈褐色明显比黑暗条件下乙烯处理的严重.     

RESEARCN OF MODEL OF AUTOMATIC CHECWEIGHER

Generally,a second order spring-damper system is used to represent the model ofweighing sensor in checkweigher. It only represents one part of checkweigher.In this paper,accord-ing to the relationships of individual parts of checkweigher and main disturbance source,a model isproposed for whole checkweigher.It is proved by simulatlon that this model is in a good approxima-tion.     

A STUDY OF THE HYDRATION AND STRENGTH DEVELOPMENT OF SPONTANEOUS COMBUSTION GANGUE CEMENT

In this paper, by means of X-ray analysis and scanning electron microscope technology, the hydration and strength development of spontaneous gangue cement under the condition of normal atmospheric temperature and steam curing are analysed. This work provides experimental and theoretical basis for the usage of spontaneous combusted gangue cement.