粳稻水分对低温烘干效益的影响试验

通过对不同水分的晚粳稻进行低温烘干试验,得到不同水分的晚粳稻烘干时间与经济效益数据.结果表明:当烘前水分18.5％的粮食烘干到16.5％时,所需烘干时间为4h,平均每吨粮食的总费用为33.68元/t.当烘前水分为26.7％的粮食烘干到16.5％时,所需烘干时间为11 h,平均每吨粮食的总费用73.61元.烘前水分为31.5％的粮食烘干到16.5％时,所需烘干时间为14 h,平均每吨粮食的总费用90.30元.此试验结果数据可为实际粮食收购、烘干作业提供参考依据.     

Development of Rapid-hardening, Expansive, High-strength Grouting Mortar

In order to solve the problem that the cement-based anchoring material has low early-strength and its volume contracts obviously, it is necessary to develop anchoring material which has characteristics of early-strength, expansion, high strength etc. Based on the ettringite with characteristic of early strong and expansion, the properties of the grouting mortars modified with alunite and gypsum were studied. The results show that at early stage the expansion is rapid and expansion is stabilized at later stage. The setting time can be controlled in 0.5～1.5 hours, and compressive strength of 1 day and 3 days reaches 20 and 40Mpa, respectively. The micro-analysis shows that with the increase of curing-time there are plenty of expansive ettringite crystals and porosity decreases. The limit load test shows that the pullout force of 1metre sample at 14 days is 93 KN, which is larger than the average lever of 1.5～2 meters samples.     

Distribution and Sources of Polycyclic Aromatic Hydrocarbons in Suspended Particle Mater in Rainy Season from Jialing River in Chongqing

16 polycyclic aromatic hydrocarbons (PAHs) were measured by GC-MS for 13 suspended particle matter samples collected from Jialing River in Chongqing in rainy season. The results showed that the total concentrations of 16 PAHs ranged from 447.47 ng/g to 1 344.92 ng/g, with a mean value of 927.48 ng/g. The concentration of total PAHs in suspended particle matter showed the trend of“up-down-up-down”in spatial distribution in the 13 sampling sites. The predominant PAHs in suspended particle matter were 4 ring PAHs, which accounting for 41.87% of the tatal PAHs. The ratio analysis and principle factor analysis-multiple linear regression(PCA-MLR) indicated that the major source of PAHs was the engine combustion source, in which the proportion of gasoline combustion and diesel combustion were 37.79% and 29.97%, respectively. The ecological risk of PAHs was evaluated by the effects range median values (ERM) and the effects range low values (ERL). The results illustrated that Acy, Ace, Fl and DahA had certain ecological risks, while the ERL values of other12 PAHs in all suspended particle matter samples were lower than the ERL guideline value,namely, PAHs in Jialing River in Chongqing could not cause obvious ecological risk.     

改善植物蛋白乳化特性的方法研究

综述了三种提高植物蛋白乳化特性的方法：化学改性法,物理改性法和酶改性法。并展望了提高植物蛋白乳化性的未来发展趋势。     

杉木容器苗嫁接技术研究

以2年生杉木容器苗为砧木,采用析因试验设计,开展了杉木容器苗嫁接技术研究。结果表明：接穗高度不仅受砧木地径、嫁接方式和嫁接部位主效应的影响,其主效应之间的交互效应也达到了极显著水平。综合考虑各因素之间的互相效应,杉木容器苗嫁接的最佳方案为：地径O．8～1．2cm的砧木采用舌接,嫁接口以下保留2～3轮底盘枝的方式,1年生接穗高度为27．7cm;地径1．2-1．6cm的砧木可采用切接或舌接,嫁接口以下保留2。3轮底盘枝的方式,1年生接穗高度可达56．0cm;地径1．6cm以上的砧木采用切接,嫁接口以下保留2轮底盘枝的方式,1年生接穗高度达到92．8cm。     

建始县生态林保护与林业产业开发利用相互关系的探讨

森林是陆地生态系统的主体,林业是经济社会可持续发展的一项重要的公益事业和基础产业,国家赋予"林业在贯彻可持续发展战略中具有重要地位,在生态建设中具有首要地位,在西部大开发中具有基础地位,在应对气候变化中具有特殊地位"。建设以森林植被为主体的国土生态安全体系,优化人居环境,改善城乡面貌,建设社会主义新农村,再现秀美山川,是国家实施可持续发展战略、构建和谐社会赋予林业的历史使命。     

慈溪市乡土树种资源调查研究(Ⅱ)——蓝果和黑果类绿化观赏树种资源与开发利用

对浙江省慈溪市乡土树种进行了调查整理,得到65种(含变种)蓝果和黑果类绿化观赏树种名录,隶属25科39属,其中慈溪新记录16种,隶属9科13属。分析了树种的地理分布、果实颜色、果熟期和果实观赏性等,并以园林观赏、生态防护、滨海盐土造林、断面边坡覆绿、水湿地绿化和其它用途的分类方式,对各树种的用途进行归类研究。最后列举了4种树种的性状和利用价值。     

双丙氨磷在橡胶树遗传转化中的应用

本研究以GV3101::pMP90RK为工程菌株,bar基因作为筛选标记基因,研究了双丙氨磷在橡胶树根癌农杆菌介导法转基因体系中对转基因愈伤组织的筛选效果,并利用该体系将橡胶树转录因子HbWRKY5转入橡胶树无性系热研8-79中。实验结果表明,3mg/L双丙氨磷可作为橡胶树转基因体系中抗性愈伤组织筛选的最佳浓度。本研究中共获得了3个抗性愈伤组织系,抗性愈伤经过体细胞胚发生共获得234个体细胞胚,经植株再生培养后共获得22株再生植株。对再生植株进行的PCR鉴定结果表明,所获得的再生植株均为转基因植株。因此,bar基因结合双丙氨磷的筛选体系可以作为橡胶树转化体系中的有效筛选体系。     

MiAsg分子克隆及与南方根结线虫病害的关系

根结线虫(Meloidogyne spp.)是一种世界性的植物病害。在前期研究中,通过利用生物信息学方法在线虫全基因组中预测了一些功能基因。本研究以预测到的线粒体ATP合成酶g亚基基因(Asg)序列设计特异引物克隆了南方根结线虫(M. incognita)的Asg基因(MiAsg),对其序列进行了特征分析后,利用病毒诱导的基因沉默(VIGS)技术,将其导入番茄植株,然后接种M. incognita,研究MiAsg基因与根结线虫病害的关系。结果表明,克隆到的MiAsg基因与预测到的MiAsg基因相似性高达100%。接种M. incognita 60 d后,MiAsg基因沉默的番茄植株根结数分别比空载体对照减少了59.6%,比清水对照降低了59.5%。结果表明,MiAsg基因沉默对根结线虫病害具有很好的防控效果,也说明MiAsg基因可能参与线虫的致病性。     

动物多功能通道装置设计制作与应用

针对动物在饲养过程中,对大型猛兽难以达到安全有效控制的特点,研制了一套实用型动物多功能通道装置,将其固定安装在动物笼舍出入口,让动物习惯性出入,必要时关闭两端栅门,调整压缩装置,对动物实施安全有效控制。本装置结构简单,使用方便,安全性好,各零部件由组合螺丝连接,可重复拆卸和安装,对大型猛兽体重测量、检查检疫、疾病诊治、串笼运输具有实用可靠的作用。本装置已获国家实用型发明专利,专利号：CN201220474789．0。