Distribution of proteins and amino acids in milled and brown rice as affected by nitrogen fertilization and genotype

A field experiment involving six japonica rice cultivars with contrasting agronomic traits and seven nitrogen (N) fertilizer treatments was performed to determine the effects of N and genotype on distribution of four kinds of grain proteins and amino acids in milled and brown rice. For brown and milled rice, albumin and globulin were controlled more by genotype than N treatments, whereas prolamin and glutelin were largely determined by N. Substantial genotypic differences in response of milled/brown (M/B) ratios of proteins to N treatments were detected. In comparison with large panicle cultivars, small panicle cultivars such as Wuyujing3 had the lower ratio and exhibited more stability under contrasting N treatments. N had significant influence on amino acid composition of brown and milled rice, with contents of the 17 amino acids measured increasing with elevated N rate. However, cysteine and methionine in brown rice and lysine and methionine in milled rice were not significantly affected by N. In addition, N had little effect on ratios of M/B for most of the amino acids.     

白兰地二次蒸馏过程中主要挥发性成分含量变化的分析

采用气相色谱和质谱联用(GC—MS)方法,研究甲醇、乙醛、乙酸乙酯、1-丙醇、异丁醇和异戊醇等挥发性物质在白兰地蒸馏时的含量变化规律。结果表明,比乙醇沸点低的乙醛和乙酸乙酯在酒头中的含量较高;比乙醇沸点高的1-丙醇、异丁醇和异戊醇在酒头末期和酒身前期的含量较高;甲醇的沸点虽然比乙醇低,但它在酒头和酒尾中的含量都较高,而在酒身中的含量较低。     

High-throughput characterization of antibiotic resistome in soil amended with commercial organic fertilizers

Journal of Soils and Sediments - The use and abuse of antibiotics in the livestock industry are believed to have contributed to the enhancement of antibiotic resistance in agricultural settings...     

Ten-year application of cattle manure contributes to the build-up of soil organic matter in eroded Mollisols

Journal of Soils and Sediments - Amendment of animal manures into eroded soils is an important approach to improving nutrient status and increasing the concentration of soil organic carbon (SOC)....     

高产节水冬小麦新品种衡7228的选育

冬小麦新品种衡7228是由河北省农林科学院旱作农业研究所选育的。选育过程中采用了水旱交替选择法、异地鉴定法等先进方法。选出的衡7228具有高产、节水、抗逆的突出特点,是非常适合黄淮北片冬麦区的一个优良品种。     

我国控释肥料生产应用现状与发展对策

介绍了我国控释肥料发展的历史及生产应用现状,指出其在生产应用中存在的价位太高、控释效果不明显和不稳定及政府对控释肥料的重视程度不够等问题,并提出了发展控释肥料的对策。     

太平鸡品种资源现状及发展建议

太平鸡是甘肃省康县特有的肉蛋兼用型地方品种鸡,是培育优质地方鸡良好的品种资源,营养丰富,具有广阔的市场前景。本文从太平鸡的资源现状和发展建议进行概述,以期为太平鸡种质资源的进一步开发提供理论依据。     

最低地温与最低气温关系的统计分析

运用数学统计学方法和气象学原理,选用巴彦淖尔市乌拉特中旗2005-2011年、临河区2006-2008年夜间有云能天连续观测年份的自动站地面A文件资料,对乌拉特中旗、临河区夜间2：00-7：00时天气状况下的最低地温和最低气温差值的年、月平均值进行了分析。结果表明：乌拉特中旗、临河最低地温与最低气温之间存在很好的正相关线性关系,而且二者之间的关系主要与夜间不同天气状况关系较大,与站与站之间以及春秋两季季节关系不大。基于不同天气状况对最低地温与最低气温差值的影响程度个别有相近之处,归类建立了4个以最低气温为基础的最低地温预报模型,并通过该模型的相关性检验得到了它们之间有很好的一致性,方程通过显著性检验。建立的预报方程可以为短期天气预报提供参考。     

鸡肺动脉平滑肌细胞培养及免疫组化鉴定

应用组织贴块法、贴块配合差速贴壁法成功培养不同日龄鸡的肺动脉平滑肌细胞。一般需4－7d细胞从组织块边缘长出，再经5－10d长成细胞单层。鸡日龄越小培养的肺动脉平滑肌细胞生长越旺盛。培养的肺动脉平滑肌细胞呈梭形、三角形、圆形核位于中央，胞浆丰富致密。用兔抗鸡α-actin多克隆抗体为一抗做免疫组化染色，平滑肌细胞占95％以上。     

试析园林桥在法国古典主义园林中鲜见之因——以凡尔赛宫苑为例

法国古典主义园林在欧洲造园史上具有很高的地位,凡尔赛宫苑是其杰出代表作品之一,然而其中很难见到园林桥的应用。本文试图从政治、文化、历史、景观、功能和科技诸方面解析原因,寻找属于那个时代的特质。