论中国甘蔗糖业科技进步

1中国甘蔗糖业发展的过程其实就是科技进步的过程1．1甘蔗种植范围的扩大和面积的增加蕴含着科技进步的成份 我国是世界上最古老的植蔗国之一，其历史至少有2000多年。建国前，我国甘蔗主要分布于广东、广西、福建、江西、贵州、四川等地区。建国后，则经历了“北移”、“南归”和“西移”三大战略性转移，而逐渐扩展到以广西、云南、广东、海南和福建等地区为主，遍及17个省(市、区)；南以海南省，     

渭蓝公路建设人为水土流失案件强制执行的思考

渭蓝公路水土保持违法案,历时3年半最终以民事裁定书结案。通过对执行过程中的管辖异议、违法主体名称异议及其确认中所涉及的法律问题和人为因素的阐述和分析,说明缜密调查取证、规范执法行为、遵循法律程序的重要意义,认为执法之难在于政府和有关部门未能依法行政,而执行难的症结在于法院作为不够,提出水保部门参与政府决策、严肃水土保持行政许可制度,是水土保持依法行政的必由之路。     

湖北淤泥湖团头鲂优良性状及种质研究

本文采用比较分析的方法,阐明了团头鲂的淤泥湖种群与其它种群相区别的形态特征,以及该种群的优良经济性状及种质.     

Humoral immune responses of cats to feline infectious peritonitis virus infection.

Immunoperoxidase antibody (IPA) method as a titrating method of feline infectious peritonitis (FIP) virus (FIPV) was developed for titrating antibody to FIPV (IPA-titer). By this method the immune responses of the cats that had been infected with FIPV, were traced. The infected cats could be grouped into three types by their immune response to FIPV and clinical appearances. Type I cats lived for a long time, formed a major group among infected cats, had 160 to 1 x 10(4) IPA-titers, and showed healthy appearances without any changes both on autopsy and histopathologically. From among type I cats, type II cats appeared sporadically with rapid elevation of IPA titers to 3.2 x 10(5) and showing clinical signs of FIP, and died. Type III cats lived healthily for a long time with gradual elevation of IPA-titers to a plateau of about 1 x 10(5), then showed neuronal disorder of hind leg paralysis with the descending IPA-titers to 2 x 10(4), and died. Thus, typical FIP appeared as a hyper-immune disease. Other related problems are discussed.     

小尾寒羊生理指标测定

对青海省民和县自繁自养的３０只小尾寒羊１０项生理指标进行了测定，结果：体温３８．９４±０．３２℃，呼吸频率２５．６０±７．１０（次／ｍｉｎ），心率８２．２０±１９．２０（次／ｍｉｎ），瘤胃里面动次数２．７７±０．６８（次／２ｍｉｎ），蠕动持续时间１８．４７±６．３６（Ｓ），ＲＢＣ为１０．４１±１．８０（×１０＾１２／Ｌ），Ｈｂ含量１２９±２１．８（ｇ／Ｌ），ＰＣＶ为０．３４９±０．０４３（Ｌ／Ｌ）     

杉苗叶片受炭疽病菌侵染后超显微结构变化的研究

 杉苗叶片受炭疽病菌(Colletotrichum gloeosporioides(Penz) Sace)侵染后,在受害程度不同的寄主细胞中,叶绿体、线粒体、细胞壁、细胞质.高尔基小泡和质膜的结构、大小及内含物有不同程度的变化。在相对没有损害的细胞中,观察到细胞壁膨胀、细胞质变浓、凝聚和出现质膜体。这一现象是细胞对病原侵入的反应,其细胞壁成份,厚度和胞质中化学成分的改变.与抵抗病原侵入有关.     

玉米籽粒突变体dek101的表型分析和精细定位

As the storage organ of maize, kernel development and accumulation of storage production directly determines maize yield and quality. In this study, a stable defective kernel mutant, named as defective kernel 101 (dek101), was identified during the development of double haploid (DH) lines in maize. The dek101 kernels displayed severely shrunk kernel appearance, significantly reduced kernel weight, lethal embryo, defective endosperm and were incapable of germinating. The dek101 showed obvious developmental abnormalities at 12 days after pollination (DAP). The fresh weight, dry weight and volume of the kernels were no longer increased after 21 DAP. Scanning electron microscopy (SEM) observation revealed that the starch granules of dek101 were significantly smaller compared with wild-type kernels. Genetic analysis demonstrated that the mutant trait was controlled by a recessive single gene. Using 441 F₂ individuals and 1648 F₃ individuals, dek101 was narrowed down to a genomic region of about 300 kb between the InDel marker IDP2182 and IDP4600 on chromosome 1, which contains five predicted genes. These results laid the foundation for mining functional genes related to maize kernel development and deciphering the mechanism of grain development.     

农户经济周期理论分析

本文分析农户经济和农户经济周期的特征以及学术界对其量化不准的缘由后,设计构建出能准确反映农户经济周期变化规律的数学模型。     

云南省珍稀畜种资源--独龙牛保护与研究工作现状及对策

独龙牛又叫大额牛，是牛亚科黄牛属中一个独立的牛种，在中国仅分布于云南省独龙江流域，目前总数已达800余头，本文详细调查了独龙牛的外貌特征。生活习性，繁殖性能，产肉性能及肉品质特性及其饲养管理。并对独龙牛资源的保护，开发与利用提出了自己的建议。