生育期降水量对不同品种大豆蛋白质含量的效应分析

大豆生育期内降水量对大豆产量和品质形成起至关重要作用,研究探讨大豆生育期降水量对大豆籽粒蛋白质含量生态效应的影响,对提高大豆产量、改善大豆品质具有重要意义.结果表明,5、6、7和9月份的降水量对大豆蛋白质含量形成起重要作用.不同品质类型大豆品种蛋白质含量与7月份降水量均呈正相关,以高油类型品种表现更为明显.针对研究结果,在大豆生育期,采取适当栽培技术与措施,及时改变与改善大豆生育期的供水情况,对提高黑龙江主产区大豆蛋白品质有积极作用     

Detection of Veneer Moisture Content by Surface-circle-shaped Resistance

1IntroductionVeneermoisturecontent(MC)anditsdistributionserveasanimportanttechnologicalparameterindicatingdryingqualities.Accordingtomanufacturingplywoodtheory(Lu1993),toohighortoolowaMCdirectlyaffectsproductqualities.Theformerwillcausesomedefectssuchasungluing,split,distortion,etc.Andthelatterwillresultnotonlyinanincreaseinproductioncost,butalsoinadeclineinproductqualitiesduetothepartialcarbonizationontheveneersurfaceanddamagingtothefiber抯physicalproperties.Atpresent,mostoftheplywoodmanuf…     

木塑门窗基材及其应用研究

基材是影响门窗节能性的重要因素之一,从国内外相关学者对木塑复合材料的原料利用、制备工艺以及制品性能检测等方面的研究入手,系统阐述了木塑复合材料的研究现状,着重分析了木塑门窗的设计方法,可为节能环保型木塑门窗的制作提供理论依据.     

柘荣县茶产业现状与发展趋势分析

本文介绍了柘荣茶树品种结构、茶叶生产加工、茶叶品牌建设和茶叶市场化进程情况.提出柘荣茶产业发展的具体措施:加大品种结构调整力度;建设高效生态茶园;茶叶初制清洁化改造;建设茶叶初加工集中园区;示范法国葡萄酒庄园管理模式;开展栽培与加工技术培训;全力打造地方品牌.     

茶树多酚氧化酶研究进展

多酚氧化酶(Polyphenol Oxidase,PPO)是茶树(camellia sinensis)中普遍存在的一种酶,是红茶制作中品质形成的关键酶类。多酚氧化酶可催化氧化儿茶素类物质形成茶黄素类(TFs)色素,而后者对红茶色、香、味等品质形成具有关键作用。     

保靖黄金茶夏季叶部病害的调查与防控

对保靖黄金茶夏季叶部病害进行初步调查,经鉴定主要有3种,分别是茶圆赤星病、茶网饼病、茶藻斑病。并对其发生特点分别进行了客观的调查、分析,进而提出了相应的防控对策。     

小麦淀粉糊化特性与DArT标记的关联分析

小麦淀粉糊化特性是评价小麦加工品质和品质育种的重要指标之一。对不同年份和地点5个环境生长的矮孟牛姊妹系及其衍生系共109份材料的RVA参数(峰值黏度、低谷黏度、稀澥值、最终黏度、回生值和糊化温度)观测, 并利用混合线性模型分析其与覆盖小麦全基因组的971个DArT (Diversity Array Technology)标记的关联性。结果表明, 分布于19条染色体上的70个DArT标记与上述RVA参数显著关联(P≤0.001), R²值范围是0.2%~23.3%。2A、2B和2D染色体上标记与多个RVA参数都有关联, 且效应值较大。这为淀粉湖化特性的分子标记辅助选择提供了重要的信息。     

Study on Development of Northeast China Fine-fleece Sheep Fetal Follicles

Research on development of fetal ovary was traced to late 70 s. Histological study on fetal horse ovarian germinal epithelium was conducted[1], followed research on germcell proliferation was carried out[2]. In the late 80s,development of 37-118 dfetalrhesus ovaries were studied through continuous ultrathin sec-tion [3]. Histological study on late fetal rhesus ovaries were conducted [4]. It was believed that fetal ovaries had ability to biosynthesis estrogen and response to gonadotrophin after…     

Expression of Duck Interferon Alpha in BL21（DE3）plysS

To obtain the protein of duck interferon alpha and study its biological activities, the prokaryotic ex-pression vector of DuIFN-α was constructed and expressed in BL21 (DE3) plysS. Using PCR technique, the proteingene of DuIFN-α was cloned from pMD-18-duIFN-α recombinant. The gene was then inserted to pGEM-T vectorand identified by restriction endonuclease analysis and sequencing. DuIFN-α was ligated with the prokaryotic expres-sion vector of pET30 a, then transformed into BL21 (DE3) plysS. The best inducing time and IPTG concentration for the expression of this recombinant protein was tested through the expression of the positive recombinant with differ-ent time span and different IPTG concentration. Lots of the protein of DuIFN-α were expressed in BL21 (DE3)plysS with 1 mmol·L-1 IPTG for 4 hours and its molecular weight for 34 000.     

湘西州脱毒马铃薯生产现状与发展对策

<正>湘西州位于湖南省西部,常年马铃薯种植面积2.66万hm2左右,是湖南省最大的马铃薯种植地区。长期以来,由于多种病毒病的交错感染,导致马铃薯品质变劣,产量降低。据国内外马铃薯生产实践证明,大幅度提高马铃薯产量和质量的关键技术是