油菜籽(饼)中蚓哚类硫苷的抗氧化性的研究

以脱脂油菜籽(饼)为材料,用弱阴离子交换剂(DEAE Sephadex A－25)柱吸附提取液中硫廿成分,除去油菜籽(饼)中其它杂质,用0.5ml/L硫酸钾溶液洗脱稀释到一定容积可直接进行色谱分析.在样品预处理过程中添加抗氧化剂可防止吲哚类硫苷的氧化分解.本实验比较了三种抗氧化剂(茶多酚、巯基乙醇、植酸)对油菜籽(饼)中吲哚类硫苷的抗氧化性.实验结果表明:巯基乙醇对吲哚类硫苷的抗氧化性最佳.     

Early-maturing dual-purpose sorghums: Agronomic trait variation and covariation among landraces

Landrace cultivars represent potentially valuable source material for breeding dual-purpose (grain and stover) sorghums. To characterize the genetic variation and interrelationships for major agronomic traits among potential dual-purpose sorghum landraces, 74 accessions, primarily from Southern Africa, the Sudan, and India, were evaluated in five environments at Patancheru, India. These environments, at 17°N with 520-540 mm rainfall during the growing season, are representative of the major sorghum-growing areas in India and the Sudanian Zone of Western and Central Africa. Significant genetic variation and high heritabilities (P = 0.01, h²= 0.63-0.92) were observed for seedling vigour, grain and stover yields, growth rate and harvest index. Time to flower was correlated with stover yield (r = 0.48, P = 0.01) and an index (I_ev) of total economic value (r = 0.44, P = 0.01) but not with grain yield (r = 0.22, P = 0.05). Grain and stover yields varied independently (r = 0.22, P = 0.05) and were similarly related to I_ev, values (r = 0.79 and r = 0.77 (P = 0.01), respectively). The 13 landraces with the highest I_ev values (adjusted for maturity) had above-average growth rates and harvest indices that ranged from 20 to 38%. Landraces from Botswana and India were more highly represented in the high I_ev set than in the full set of accessions.     

油菜无融合生殖材料AMR—1的农艺性状及无融合生殖特性的分析

对油菜无融合生殖材料ＡＭＲ—１的农艺性状及无融合生殖特性进行了统计。结果显示：（１）ＡＭＲ—１的农艺性状与母本甘蓝型油菜Ｓ４５相似，与父本蓝花子差异较大。（２）ＡＭＲ—１（Ｆ６）９个株系平均不育株率为１４．１％，最高２６．１％；２０株不育株平均座果率为１７．１％，最高４７．０％；无融合平均结籽率１１．１％，最高达６４．６％。（３）ＡＭＲ—１（Ｆ７）７个株系平均不育株率为５３．９％，最高达３９．７％；无融合平均结籽率为２４．１％，最高达５９．３％。     

高寒地区不同干燥法对紫花苜蓿营养价值的影响

研究了高寒地区不同干燥方法对紫花苜蓿营养价值的影响，结果表明：压扁茎秆结合日晒干燥法所用干燥时间短，减少了紫花苜蓿粗蛋白质、钙、磷等营养物质的损失，有利于营养价值的保持，从而提高了干草的质量。     

In vitro metabolism of ovarian steroids by bovine whole blood and plasma

Experiments were conducted to evaluate the effects of time and temperature on the potential of bovine whole blood (WB) or plasma (PL) to metabolize the ovarian steroids progesterone, estradiol-17β and testosterone. During a radioimmunoassay study (Experiment 1), we observed a temperature and time-dependent reduction (P<0.001) of plasma progesterone concentrations in samples incubated as WB at 5, 15, 25, or 35C for up to 48 hr. Most notable was the observation that 27% of progesterone present in controls was lost when WB was incubated at 5C for 48 hr and a 17% reduction was observed when PL samples were incubated at 35C for 48 hr. Immunoreactive estradiol-17β concentrations (Experiment 2) in PL and WB incubates were not affected by time or temperature. However, immunoreactive testosterone concentrations increased more than 3-fold by 48 hr in WB incubates held at 35C. To examine the latter observation further, ³H-progesteone was incubated with WB at 35C, followed by extraction and thin-layer chromatography (Experiment 3). Results generally supported RIA findings and revealed the presence of significant 17α-hydroxylase, 17–20 lyase and aromatase activity. Heretofore this has not been considered to occur outside major steroid metabolizing organs.     

函数y=e~x的一特性及其应用

本文就函数y＝ex的一特性进行了讨论，同时利用此性质解决了数学分析中的几个具体问题．     

以外语节丰富学生英语实践的思考

通过分析外语节所包含的形式和内容，多角度展现了外语节的可行性和实用价值及其主题模式对英语专业及其它专业的适用性，为探索如何使学生社会实践多样化提供参考。     

~(14)C示踪研究不同小麦品种开花、灌浆期的光合效率及同化物的运转与分配

应用~(14)C示踪技术测定三个籽粒饱满度不同的小麦品种,结果表明:籽粒饱满度与品种的净光合率、光合持续期和同化物在籽粒中的分配率有关;光合作用后30分钟测定,~(14)C同化物的分配,叶片最高,叶鞘其次,麦穗再次,茎中最低;开花期~(14)C同化物在成熟麦穗中的分配,约占引入量的25—32％,灌浆期~(14)C同化物在成熟麦穗中的分配,对籽粒饱满的两个品种,占引入量的50％以上,而籽粒不饱满的品种,分配率还不到30％。     

后现代主义“反侦探小说”——以《芒博琼博》为例

后现代“反侦探小说”是当代越来越受到评论家关注的一个亚文类。本文在简要梳理“反侦探小说”基本特征的基础上，结合非裔美国作家伊什梅尔·里德的代表作《芒博琼博》，从罪案之谜、侦探形象和叙事结构等方面进一步探讨后现代文本对传统侦探小说的解构。本文认为，对后现代“反侦探小说”政治性的认识，是一个值得商榷的问题。     

复合地板生产工艺

复合地板是极具竞争力的新型内装饰材料，本文介绍了复合地板的特性及生产工艺，着重阐述了表板侧向预先胶合三层板坯结构常规加热生产工艺与表板在压机内挤紧五层板坯结构高频加热生产工艺二者的区别。