2个宁夏枸杞新品种花蕾物质代谢水平研究

为进一步揭示宁夏枸杞新品种‘宁杞6号’和‘宁杞8号’花蕾发育的生理生化机制,研究了‘宁杞6号’和‘宁杞8号’不同发育时期花蕾中可溶性糖、游离脯氨酸、游离总氨基酸、可溶性蛋白含量的变化趋势。结果表明‘宁杞6号’花药发育中可溶性糖、游离脯氨酸、可溶性蛋白含量高于‘宁杞8号’,游离总氨基酸低于‘宁杞8号’,‘宁杞6号’和‘宁杞8号’花药发育过程中花蕾中的可溶性糖、游离总氨基酸、可溶性蛋白变化规律不同,游离脯氨酸变化规律相同,四分体发育时期后‘宁杞6号’花蕾的可溶性蛋白代谢比‘宁杞8号’活跃。可溶性蛋白代谢异常可能与‘宁杞8号’花少、代谢较为缓慢有关。     

Study on the Long Phosphorescent Green Illuminant Materials

This paper covers a new long phosphorescent material which absorbs daylight or lamp light and saves the light during the day and will illuminate after exposure,This nonradioactive, non_poisonous illuminant material will receive ultra_violet and visible lights and its luminous intensity is 10 times more than that of previous phosphorescent materials,meanwhile with more than 24 hrs phosphorescent time and 10 years lifetime,this luminous material may be used for the illuminating purposes such as indicator light.     

Application of MRP in Material Management of Building Construction

On the base of the logic flow chart of the building construction's material request plan,the three prerequisites are given for MRP being introduced into building construction:the construction item's project schedule,the listing of the materials that will be used in the construction item and the information of the current stock in the construction unit must be gained. The prerequisites are also solved: the construction item's project schedule is made through network planning technology and database's programming; the listing of the materials is memorized according to the construction act; the up_to_date storage information can be gained by contacting to the storehouse's management department in time. Finally, the material request plan is drafted by the method of MRP.     

不同来源玉米自交系及杂交组合杂交当代子粒性状的差异分析

玉米杂种优势的研究对于提高玉米产量和品质有重要意义。对2013年海南三亚种植收获的89份温带自交系、59份热带/亚热带自交系和由这148份自交系随机组配的179份杂交组合进行当代子粒性状的测定。分析了温带玉米与热带/亚热带玉米自交系子粒性状的多样性与差异性,同时依据亲本来源的不同,探索了不同组合的杂交当代子粒性状的差异性。结果表明：温带来源的玉米自交系粒长和百粒重比热带/亚热带材料的粒长和百粒重显著偏长偏重;不同来源的自交系组配的杂交当代F₁,母本来源于温带的杂交当代F₁粒长显著长于母本来源于热带/亚热带材料;杂种优势分析结果说明,杂交当代F₁在粒厚和百粒重性状上表现的相对高亲和相对中亲优势强于粒长和粒宽。     

A Review of Recent Advances in Research and Development on Vehicle Semi-Active Suspension Systems

Based on the systems engineering theory, this paper reviews the trend of researches and developments on vehicle semiactive suspension systems, analyzes states of researches on electrorheological fluids and magnetorheological fluids material,and puts forward semi_active suspension sytems based on magnetorheological fluids damper. On the basis of summing up existing methods for vibration control on semi_active suspension systems, emphases are put on the discussion of aplication of PID control. linear optimal control,adaptive control and intelligent control on the semi_active suspension systems. The compound control strategy is put forward based on the skyhook damping control theory, fuzzy control theory and adaptive control theory. Moreover, the integral idea about the research and development of semi_active suspension is based on MR damper,and discusses some theories and applied problems deserving research.     

A Practical Application of Starch Determination in Vegetative Plant Material

Starch determination in plant matter is necessary because of the importance of the carbohydrate pool in combination of the nitrogen pool in crop growth and development. This analysis is complicated in vegetative materials by contamination with non-starch containing material. Starch is not a homogenous material, so the content of amylose and amylopectin varies from the different growth stages and from crop to crop. Therefore standard methods of starch estimation give no exact result. The method described here based on a pretreatment of the plant material with dilute alkali before hydrolysis with amyloglucosidase and the estimation of the glucose content. Therefore this procedure was first tested on amylose, amylopectin, soluble starch, three commercially available starches, and was then applied to vegetative rape material. Recoveries of amylose and three commercial starches were between 98 and 100 % after a additional ultrasonic treatment. The method is advantageous because it is simple, quick and reproducible.     

三种化学物质处理种薯对马铃薯产量及品质的影响

研究了赤霉素、硫脲和高锰酸钾等3种化学物质处理种薯对马铃薯产量及品质的影响,结果表明:采用3种化学物质处理的马铃薯与对照(ck)比较,均能提高马铃薯产量和干物质的含量,同时降低硝酸盐(NO3-)的含量;以赤霉素处理增产效果最为显著,品质最佳.     

A Strain-equivalent Non-local Constitutive Model for Lamellar Dual-Phase Materials

Pearlitic steel is composed of numerous pearlitic colonies with randomly distributed orientations,and each colony is composed of many alternatively arranged parallel lamellas of ferrite and cementite.The pearlitic steel with fine interlamellar spacing possesses excellent mechanical properties,such as high strength,good resistance against wear,and high fatigue life,etc. Based on the inconsistency of the deformation between the two phases,a strain_equivalent and non_local constitutive model is proposed. Using this model,the effect of the interlamellar spacing of peailitic steel,a fundamental parmeter of the microstructure of pearlitic material, on its macroscopic mechanical behavior can be described without changing the local material parameters for each phase of the material.The asymmetrical cyclic plasticity of both the hot_rolled and the off_line full_length quenched pearlitic steel PD3 is analyzed.The comparison between the computational and the experimental results shows satisfactory agreement.     

食品原料的安全控制课程体系建设

食品原料是食品供应链的源头,它的安全是保障食品安全的起点。对食品原料进行安全控制,可有效减少食品安全事件的发生,因此,食品原料的安全控制是食品质量与安全专业非常重要的一门核心课程。从课程建设的必要性、课程简介、课程目标、课程内容及与其他课程的联系等方面,详细介绍了食品原料的安全控制课程的建设。     

超低温11年保存期对转基因作物基体标准样品核酸检测的影响

标准物质是转基因检测结果可靠性、可比性以及准确性的重要参比,不可缺少。本文研究了植物转基因成分检测中基体标准物质的长期保存对PCR检出及低含量标准物质量值稳定性的影响。应用普通定性PCR、实时荧光PCR和微滴式数字PCR3种方法,对不同含量转基因标准物质和转基因检测样品进行了复现性和量值稳定检测。结果表明,-70～-75℃保存条件下, 9年保存期的转基因含量为0.1%的单一作物转化体标准物质中依然能得到清晰的转化体目标片段扩增,且Ct值在36左右。数字PCR定值结果表明, 9年保存期的转基因基体标准物质的量值保持稳定。11年保存期的大豆、玉米、水稻的混合基体样品中各转基因元件均能稳定检出。研究结果表明转基因基体标准物质的长期低温保存不会影响其各转基因元件的检出和作为转基因核酸检测阳性对照的应用。     

环境友好型生物降解材料聚乳酸的性能研究

聚乳酸(PLA)是一类重要的绿色环保型可降解材料,正受到人们越来越多的关注,近年来被广泛应用。笔者简要论述了生物降解材料聚乳酸的物化性能、力学性能及生物降解性能,综述了聚乳酸的合成方法—乳酸直接缩聚法和丙交酯开环聚合法,分析了国内外的生产现状。最后,对聚乳酸的合成及应用前景进行了展望,并指出可生物降解材料聚乳酸一旦工业化,它在医用及降解塑料方面将会有难以估量的应用前景。     

浅谈茶的保健功能及茶保健品的发展现状

茶的保健功能主要依赖于它本身所含成分的生理功能。从茶所含物质的特性入手,浅论茶的主要保健功效,尤其在抑制自由基方面的抗氧化作用。介绍了几种目前比较流行的茶的特色,以及茶的发展动态。     

配方均匀设计法优化挤压膨化物料配比

利用均匀设计软件生成的15种原料配比对其营养成分、膨化度和糊化度进行分析研究,以确定挤压膨化的最佳进料比。结果表明,豆粕中含有丰富的蛋白质,但其淀粉含量非常低,与小米和大麦恰好相反,配比7中蛋白质含量稍低;15种原料配比的膨化度和糊化度比较分析得出配比1优于其他配比。综合以上因素,选取原料的配比为8∶1∶1作为小米、大麦和豆粕复合挤压膨化的进料比。     

普通小麦-黑麦抗白粉病异附加系的鉴定

以抗病性强的奥地利黑麦（Secale cereale L.）为父本，与陕麦611杂交、自交，在衍生后代中筛选出表型整齐一致且抗白粉病性好的株系1530W3和1493E3。研究表明，两个衍生系在形态学和细胞学上已基本稳定，染色体构型为2n=44=22II。采用122个SSR引物对两个衍生系及其亲本进行SSR分析，有5个引物在两个衍生系中可扩增出黑麦的特异性产物，结果表明，黑麦的遗传物质已经导入到普通小麦中。     

Selection of Materials in Building Design

The selection of materials in building_design is explained by several actual examples and the relationship between materials and design is studied in this paper.     

Utilizing Industry Solid Wastes as Resource of Building Material in Chongqing

To embed or heap industry solid wastes somewhere will occupy the earth and pollute the environment seriously. So utilizing the industry solid wastes as regeneration resource is important for sustainable development of city. Based on application and research for years in utilizing industry wastes and widely investigation, the produce status of industry solid wastes in Chongqing such as fly ash, desulfuration gypsum, blastfurnace slag and chromium slag are introduced. At the same time,this paper introduces application and research on these wastes in field of building material in Chongqing. Analyze problems and countermeasures during utilizing industry solid wastes as regeneration resource in Chongqing. As a further the prospect of utilizing industry solid wastes as regeneration resource of building material is discussed.     

黄瓜绿斑驳花叶病毒低风险参照物质的研制

采用RT-PCR方法扩增黄瓜绿斑驳花叶病毒的外壳蛋白基因与3,非编码区,并将其构建到马铃薯X病毒(PVX)载体中.重组质粒经线性化及体外转录后接种烟草,获得含有病毒外壳蛋白基因的感病植株.感病组织可用于分子检测的质控,也可作为毒源来繁殖阳性参照物质.基于PVX载体制备的参照物质可降低检疫性病毒的生物安全风险,尤其对稳定性强、可造成严重经济损失的高风险病毒的检疫更具实用价值.     

Progress of Intelligent Concrete Repair Materials

Intelligent concrete patching material can discern little concrete crackles or other structure defects and auto-excited mending material,to repair them.Thus the strength and service life of the concrete can be recovered or improved.The development and application prospect of intellectual patching material is very good for the intelligent mending way.In this paper,the research state of this kind of patching material in recent years is introduced.Especially the mending mechanism,the study and application state of cementitious capillary crystalline patching material and intellectual self-healing concrete system are discussed in detail.