野生线叶野豌豆种子特性实验室测定研究

通过对线叶野豌豆种子进行处理,测定种子千粒重、种子生活力、种子发芽率,并采用不同处理方法对种子发芽率进行了研究,结果表明,用浓硫酸浸种取得的效果最佳,最佳的浸种时间为5～15min.     

降香黄檀荚果和种子生长发育规律研究

降香黄檀(Dalbergia odorifera)为珍稀树种,天然分布的降香黄檀濒临绝迹,为保护现有的降香黄檀种质资源,本研究以广西降香黄檀荚果作为研究对象,观察荚果和种子的生长发育变化情况,并对降香黄檀种子部分生理生化指标及发芽率的变化进行测定,探讨降香黄檀荚果和种子的生长发育规律,为确定其适宜采收期提供理论支撑。结果表明：降香黄檀荚果和种子的颜色由浅绿色逐渐过渡到黄褐色,最终在盛花期后160 d后变为深褐色;荚果和种子体积大小在整个采收期中一直维持不断增长的趋势,且在盛花期后185 d开始缓慢而稳定地增长;种子含水量在盛花期后185 d后降至35%左右并趋于稳定;种子可溶性糖含量呈现先升高后降低的趋势,在盛花期后165 d最高,为45 g·kg^-1左右,直至盛花期后195 d降至42 g·kg^-1左右;种子可溶性蛋白含量呈“双峰”动态变化,盛花期后135 d达到第1个峰值,盛花期后180 d达到第2个峰值,之后开始缓慢下降;种子的发芽势、发芽率在盛花期后140-170 d达到最高,且与170 d后无显著性差异。因此,盛花期后185-200...     

毛白蜡种子药剂浸种催芽试验

对毛白蜡（ＦｒａｘｉｎｕｓｐｅｎｎｓｙｌｖａｎｉｃａＭａｒｓｈ．）种子进行药剂浸种催芽对比试验,结果表明,５０℃始温温水浸种２４ｈ后,用吲哚乙酸（ＩＡＡ）浸种３ｈ和２×１０－４赤霉素（ＧＡ３）浸种２４ｈ置育苗盆催芽２５～２７天,发芽率分别达到６４％和６２％,与层积催芽法发芽率基本相当。     

Instrumental causes and the natural origin of souls in Antonio Ponce Santacruz's theory of animal generation

This article studies the theory of animal seeds as purely material entities in the early seventeenth-century medical writings of Antonio Ponce Santacruz, royal physician to the Spanish king Philipp IV. Santacruz adopts the theory of the eduction of substantial forms from the potentiality of matter, according to which new kinds of causal powers can arise out of material composites of a certain complexity. Santacruz stands out among the late Aristotelian defenders of eduction theory because he applies the concept of an instrument of direction developed by the medieval Avicenna commentator Gentile da Foligno and gives a novel turn to this concept by interpreting animal seeds as separate instruments. The article situates Santacruz's theory in the context of early modern debates about the concept of the eduction of forms, as well as in the context of early modern debates about the concept of separate instruments. Particular attention is paid to Santacruz's responses to the biological views of Julius Caesar Scaliger and Thomas Feyens. Santacruz's response to Scaliger turns out to be central for his explication of the eduction relation, and Santacruz's response to Feyens turns out to be central for his explication of the nature of instrumental causation.     

碳离子不同入射深度上番茄种子的发芽率和染色体畸变

作者用碳离子束辐照多层重叠番茄种子的方法,研究了离子的入射深度与种子的发芽率和根尖细胞染色体畸变水平之间的关系,结果表明:置于离子束通道部位的种子发芽率较高,染色体畸变水平则较低;置于离子射程末端Bragg峰区的种子发芽率较低,染色体畸变水平则较高。这些趋势与离子在入射深度上的物理剂量分布特点相一致。     

高压芒刺静电场对玉米种子发芽影响的实验研究

探讨了高压芒刺静电场对玉米种子萌发过程中的形态及各项指标的影响.将培养在水域中的玉米种子经高压芒刺静电场连续处理4 d,取出置于培养条件适中的环境中使其发芽,观察测量其发芽率、芽长,计算了发芽指数和发芽势.结果表明:处理后的玉米种子的发芽指数、发芽势、发芽率和芽长都明显增加,且对距离芒刺尖端近的种子萌发的促进作用尤其显著.因此,合适的高压芒刺静电场预处理玉米种子,能有效地提高发芽指数和种子活力.     

几种因素对氢氧化镁料浆过滤性能影响的研究

以氯化镁为原料,以氢氧化钠为沉淀剂,采用加入氢氧化镁晶种的方法制备氢氧化镁。研究了晶种系数、反应温度、反应时间对料浆过滤性能的影响,并通过正交试验找到了最佳反应条件。对探索氢氧化钠法制备氢氧化镁有一定的参考意义。     

大麦芽浸提液对蔬菜种子发芽及幼苗生长的影响

用大麦芽浸提液对菠菜、石刁柏、洋葱、胡萝卜等蔬菜种子进行浸种处理,可以显著促进发芽,提高发芽率和发芽势.用大麦芽浸提液进行浸种处理后的菠菜种子播种后,可以加快叶片的扩大速度,但对植株高度和全株鲜重没有影响.     

Abnormal protein aggregation and neurodegenerative diseases

Abnormal protein aggregation or amyloid is the major cause of many neurodegenerative disorders. The present review focuses on the correlation between sequence and structure features of proteins related to the diseases and abnormal protein aggregation. Recent progress has improved our knowledge on understanding the mechanism of amyloid formation. We suggest a nucleation model for ordered protein aggregation, which can also explain pathogenesis mechanisms of these neurodegenerative diseases in vivo.     

苦瓜系列产品的研制

苦瓜具有良好的食用和药用价值 ,但由于其带有明显的苦味 ,而不容易被消费者接受。采用新鲜苦瓜为原料 ,通过控制苦瓜成熟度及采用酶处理、调配、热烫等加工方法 ,解决了苦瓜明显苦味所带来的口感缺陷 ,保持了苦瓜特有的清香 ,研制出多种风味独特的苦瓜系列产品