加速溶剂萃取-气相色谱法测定土壤中菊酯类农药残留

采用加速溶剂萃取法测定土壤中菊酯类农药残留物。土壤样品与无水硫酸钠按1∶3(W/W)混合后,再加适量氟罗里硅土,用石油醚与乙腈1∶1(V/V)混合液在加速溶剂萃取仪上以10 Mpa、50℃提取10 m in,土壤中3种菊酯类农药的回收率在83.9%~100.0%之间,检出限为33.0~51.2 pg。     

油菜细胞质雄性不育系及其保持系不同发育阶段内源激素动态变化初探

利用酶联免疫测定技术研究了波里马（polima）油菜细胞质雄性不育系和保持系不同发育阶段叶片和花蕾中IAA、GAs、ABA和iPAs的动态变化。研究结果表明：（1）叶片和花蕾中GAs含量均先降后升,但不育系的含量比保持系的高。（2）不育系叶片中IAA含量先升后降,而保持系的与此相反,且前者的含量在大多数时期高于后者;不育系花蕾中的IAA先降后升,而保持系的却一直降低,且前者的含量高于后者。（3）两系叶片和花蕾中ABA含量变化趋势相似,但以不育系为高。（4）iPAs在整个检测过程中始终低于检测范围。提示不育系叶片和花蕾中IAA、GAs和ABA含量变化出现了异常,且明显高于保持系,这可能与雄性不育有关。     

乙烯与水稻细胞质雄性不育的关系

从幼穗发育的IV到VII期,水稻细胞质雄性不育系(珍汕97A)幼穗和叶片的ACC含量和乙烯释放速率均高于其保持系(珍汕97B)。外施乙烯释放剂乙烯利使保持系花粉可育度明显下降;外施ACC合成酶抑制剂AVG引起两系幼穗ACC含量和乙烯释放速率下降,并使不育系花粉育性得以部分恢复,而在外施AVG的同时再施以乙烯利则AVG的恢复作用消失。     

The pulping and papermaking characteristics of youngL.gmelini andB.platyphylla

5, 10, 15, and 20 year oldLarix gmelini andBetula platyphylla were used as pulping raw material in the research. The examination of youngL. gmelini andB. Platyphylla fibrous structures showed that the fiber length and ratio of length to width of 5 years oldL. gmelini noticeably differed from that of matureL. gmelini. but that of 5 year oldB. platyphylla were nearby equal to that of matureB. platyphylla. The research results indicated that 15 years oldB. platyphylla and 20 year oldL. gmelini were best suited to pulping among the eight experimental raw materials; 10 years oldB. platyphylla and 15 year oldL. gmelini were optimal to the ratio of beating degree increment and corresponding beating time. The pulp characteristics of 15 year old B. platyphylla and 20 year oldL. gmelini were similar to those of mature wood, and it was feasible to consider 15 years toB. platyphylla and 20 years toL. gmelini as their rotation period; 10 years and 15 years as their thinning cycles for the papermaking forest base.     

对学术主导的现代大学治理制度架构的思考

架构现代大学治理制度是大学生存和稳定、健康、持续发展的保证。本文论述了学术主导的大学治理结构的模式,使教授成为大学的决策者和学术事务的管理者,分析了在现代大学治理中营造学术自由、大学自治的学术生态环境的重要意义,并提出了完善学术主导的教职制度的具体措施。     

党的先进性建设与实现社会主义新农村

阐述了党的先进性建设与社会主义新农村建设的关系,并提出了如何通过建设党的先进性来实行社会主义新农村的建设。     

THE PULPING AND PAPERMAKING CHARACTERISTICS OF YOUNG L.GMELINI AND B.PLATYPHYLLA

5,10,15,and 20 year old Larix gmelini and Betula platyphylla were used aspulping raw material in the research.The examination of young L.gmelini and B.Platyphyllafibrous structures showed that the fiber length and ratio of length to width of 5 years old L.gmelini noticeably differed from that of mature L.gmelini.but that of 5 year old B.platyphyllawere nearby equal to that of mature B.platyphylla.The research results indicated that 15 yearsold B.platyphylla and 20 year old L.gmelini were best suited to pulping among the eight exper-imental raw materials;10 years old B.platyphylla and 15 year old L.gmelini were optimal tothe ratio of beating degree increment and corresponding beating time.The pulp characteristics of15 year old B.platyphylla and 20 year old L.gmelini were similar to those of mature wood,andit was feasible to consider 15 years to B.platyphylla and 20 years to L.gmelini as their rotationperiod;10 years and 15 years as their thinning cycles for the papermaking forest base.     

特效植物营养素的表观遗传效应对常规稻四代的系列影响

[目的]研究特效植物营养素的表观遗传效应对常规稻4代的系列影响。[方法]用常规稻一个品种采用特效植物营养素（SPNE）进行了4代的系列对比试验,比较每代都用 SPNE处理比清水对照的增产幅度;从第2代开始每代比较上代用 SPNE处理当代用清水比每代清水对照的表观遗传增产幅度;比较用 SPNE处理相同地点不同的增产效果;还比较了同代 SPNE不同喷施次数的表观遗传增产效果。根据卫生部发布的食品安全和食品污染物限量的国家标准对 SPNE处理和对照的稻米进行了对比检测,重点检测了镉的含量,还对比检测了蛋白质的含量。[结果]在4代范围内随着 SPNE处理代数的增加,增产幅度逐代增加,表观遗传增产幅度逐代增加,用 SPNE处理相同地点不同的产量不同,但同田对比对应的增产幅度接近,SPNE不同喷施次数对应的表观遗传增产效果接近。 SPNE处理和对照的稻米污染物含量都远低于国家限量标准,SPNE处理后的稻米镉含量显著低于对照,蛋白质高于对照,比对照更安全更营养。[结论]为提高常规稻的产量提供理论依据。