甘蔗愈伤组织继代培养中的蔗糖效应

以甘蔗幼嫩叶鞘为外植体，经多种培养基诱导出愈伤组织，选择产愈率较高的三种培养基继代，对增殖效果较好的培养基再次进行不同蔗糖浓度梯度的增愈试验。结果表明，低蔗糖浓度（１．５％）有利于愈伤组织的生长发育，组织块质量好．产愈量和产胚量高；高浓度则不利于愈伤组织增殖。     

北方型玻璃连栋温室节能技术开发研究

能耗是在高纬度地区建造大型温室的重要指标。沈阳地区自主设计建造的北方型玻璃连栋温室采用了整体半地下建筑、全部中空玻璃覆盖、金属介面无冷桥设计三项节能技术，经运行测试取得显著的节能效果，可在我国北方寒地生态地区应用，对相关问题进行了讨论。     

红巴梨果实花青素生成相关基因f3h全长片段的克隆

利用 RT-PCR方法从红巴梨成熟果皮中克隆出花青素生成相关基因 f3 h的全长片段 (1 0 95 bp) .核苷酸序列测定表明 ,该基因与苹果的 f 3 h基因同源性高达 97% .     

中国疯草防除与利用研究

中国疯草主要布在西南、西北和华北广大牧区，面积达400多万hm^2。多年来，疯草严重威胁着当地畜牧业的发展，造成重大的经济损失。本文从人工防除与利用，生物控制与灭除，化学控制与灭除和动物免疫预防及化学治疗四个方面就有关疯草防除和利用的技术和方法进行综述。     

江苏"九五"中粳稻区试综合性状演变及育种对策

分析了“九五”江苏省中粳区试参试品种综合性状的演变 ,针对常规中粳稻育种存在的簿弱环节 ,提出了今后的育种对策 :( 1 )发掘有利种质 ,强化杂交配组。 ( 2 )塑造新的高产株型。( 3)将优质列入重要位置。 ( 4 )增强品种的抗逆能力     

Research Progress of the Cure Effect of Eelectrochemotherapy on Tumor

Electrochemotherapy is a new therapy on curing tumor, and it consists of two therapies, which are direct current electrochemotherapy and electric pulse aided antitumor medicine electrochemotherapy. Its widely application prospect is being taken on. Researchers home and overseas study deeply in the wide field of its cure mechanism, ways and means, animal tests and clinical application. Medical studies have shown that electrochemotherapy is an easily operated therapy with excellent curative effect and security. On the basis of these studies, a new therapy is put forward, that is, energy-controllable steep pulse therapy, electric pulse' killing effect on cell membrane is called as irreversible breakdown, and the first-stage study results of this new therapy are introduced.     

四照花一年生播种苗年生长节律研究

用Logistic生长曲线对四照花一年生播种苗的苗高、地径生长进行拟合,相关系数分别为0.991和0.970,均达极显著水平。根据四照花一年生播种苗的生长动态模拟和实际测量值,其年生长进程可划分为出苗期、生长初期、生长盛期、生长后期4个时期。苗高的速生期为6月上旬至8月中旬,占全年生长期的32.28%,生长量为全年总生长量的57.49%,比地径提早20 d结束速生期进入生长后期;地径速生期为6月上旬至9月上旬,用40.55%的生长时间完成了58.38%的生长量。     

Effect of Nano-Al2O3 on the Properties of Ultra High MolecularWeight Polyethylene Engineering Material

The composite material of nano-Al 2O 3 and UHMW-PE was made by the way of pressing and agglomeration. Effect of nano-Al 2O 3 on the friction, wear characteristic of Ultra High Molecular Weight Polyethylene plastic was studied by using MPV-200 model friction and wear tester and caustic wear one. At the same time, the hardness of UHMW-PE was mensurated in sclerometer. The results showed that nano-Al 2O 3 not only decreases the friction coefficient of UHMW-PE, but also greatly reduce the wear of UHMW-PE.The hardness of UHMW-PE is improved. Which possesses important theoretic significance for optimizing of structure and property of UHMW-PE material.     

水稻不同穗型品种穗颈节间组织与籽粒充实特性的研究

本文用7个不同穗型的中稻品种,研究了重穗型、中穗型、轻穗型品种的穗颈节间组织特性及其与籽粒充实的关系.结果表明:穗颈节间维管束数目,维管束、韧皮部面积,茎横切面、茎壁、髓腔面积,均是重穗型>中穗型>轻穗型品种.穗颈节间输导组织特征与空壳率的大小无关,但它是籽粒充实的重要前提和解剖学基础.穗颈节间茎的粗度、茎壁的