3—己烯—1—醇及其酯类的合成和香气研究

介绍了叶醇(cis-3-己烯-1-醇)及其异构体的实用合成路线。由顺反混合(或全反式)3-己烯-1-醇制备了一系列羧酸酯,研究了这些化合物的结构与香气的关系,从中发现一些有实用价值的新香料。     

计算旋转螺旋面三维边界层的一种积分方法

本文将计算二维层流边界层的Thwaites方法和计算二维湍流边界层的Truckenbrodt方法推广,用以求解旋转系统的“准三维”边界层方程,得到了计算旋转螺旋面上三维边界层的一种可迭代求解的积分方法.应用此方法进行了两例计算.计算结果与理论精确解或实验测量的对比表明,本文方法是有效的.     

Effects of a new cholecystokinin antagonist (GE 410) on the smooth muscle of the guinea pig ileum

Summary Suc-Tyr-(SE)-Met-Gly-Trp-Met-Asp--phenethylamide (GE 410) competitively antagonized the contractions of smooth muscle strips from guinea pig ileum (pA₂=7.6, n=0.95) induced by cholecystokinin-octapeptide (CCK8). GE 410 inhibited the electrically-induced cholinergically mediated contractile responses and the [³H]ACh release in the ileum, as well as the CCK-stimulated electrical contractile responses and the [³H]ACh release in the cholinergic nerve terminals. The results suggest the existence of CCK-receptors not only in the smooth muscles but also on the neurons.     

Metabolism of 3β-hydroxycholest-5-en-26-oic acid in hamsters

Summary Metabolism of 26-hydroxycholesterol to 3-hydroxychol-5-en-24-oic acid and other C24-bile acids has been expected to occur by way of 3-hydroxycholest-5-en-26-oic acid in studies in vitro. 3-Hydroxycholest-5-en-26-oic acid was infused intravenously into bile fistula hamsters and the following C24-bile acids were identified: 3-hydroxychol-5-en-24-oic acid, lithocholic acid, chenodeoxycholic acid, and a small amount of cholic acid.     

四棱豆“桂丰三号”主要性状观察初报

报道了“桂丰三号”的主要植物学特征、农艺性状和生长发育特性．“桂丰三号”是一个无限生长型的中晚熟品种,主蔓长３．５～４．５ｍ,其第１５～２０节开始着生花芽、第３～１０节上共长出３～７条侧蔓．３月１５日至６月３０日期间,从播种到开花约需７５天;７月１０日至２０日期间,从播种到开花约需５０天．３月至７月２０日期间,无论何时播种,其开花结荚盛期都在９月中旬至１０月中下旬。单株结荚数３０～５０荚,荚长１９ｃｍ,荚横断面呈正方型,每荚有１５粒种子,老熟种子黄褐色、圆形,千粒重３００ｇ。嫩豆荚淡绿色,成熟豆荚黑褐色．     

Occurrence of 3-epi-22-deoxy-20-hydroxyecdysone and its phosphoric ester in diapause eggs of the silkworm,Bombyx mori

Ecdysteroids in diapause eggs of the silkworm,Bombyx mori, were analyzed using high-performance liquid chromatography (HPLC) combined with radioimmunoassay (RIA). A relatively large amount of an unidentified free ecdysteroid and its phosphoric ester (conjugated form) were detected. These two compounds were isolated by a combination of column chromatography on silicic acid, thin-layer chromatography (TLC), and HPLC using a reverse-phase (RP) column. The purified compounds were identified as 3-epi-22-deoxy-20-hydroxyecdysone (22d20E) and 3-epi-22-deoxy-20-hydroxyecdysone 2-phosphate (22d20E2P) by means of mass spectrometry and nuclear magnetic resonance spectroscopy. to our knowledge, this is the first report of 22d20E and 22d20E2P.     

机载MIMO雷达3-CAP杂波抑制方法

针对机载雷达面临的杂波抑制问题,在考虑阵元误差、通道误差和杂波起伏等误差因素对杂波特性影响的基础上,建立了机载MIMO雷达杂波数学模型,提出了一种基于MIMO雷达体制下的空时自适应新方法——M3-CAP方法。对接收信号进行时域滤波,选取被检测通道与其2个相邻通道为一组,进行自适应处理。该方法通过MIMO技术与3-CAP方法的有效结合,将波形分集的优势扩展到3-CAP方法中,显著提高了雷达系统自由度和杂波协方差矩阵估计精度。通过对不同雷达体制以及不同误差条件下杂波抑制性能的分析比较,结果表明:提出的M3-CAP方法的杂波抑制性能明显优于JDL-GMB、改进的JDL、3-CAP等方法。     

苯甲酰三氟丙酮与稀土配合物的合成及性质研究

本文合成了苯甲酰三氟丙酮（Ｌ）和三苯基氧膦（ＴＰＰＯ）、联吡啶（Ｂｉｐｙ）、邻菲罗啉（ｐｈｅｎ）、四甲基氢化铵（ＮＭｅ４ＯＨ）与稀土Ｙ、Ｌａ、Ｅｕ、Ｔｂ离子的混合型配合物。测定配合物的Ｈ１ＮＭＲ谱及质谱,并对测定结果进行了分析。     

WS~*-闭空间的性质

该文引入了一类包含Ｓ－闭空间的拓扑空间——ＷＳ＊－闭空间,并讨论了它的一些性质,对一些关于Ｓ－闭空间的已知命题,建立或推广得到ＷＳ＊－闭空间的相应命题。     

一种磨茹香气香料——1-辛烯-3-醇的合成与应用研究

从１－戊醇出发,通过卤代反应,格氏反应,制备得到１－辛烯－３－醇。该产品具有愉快的蘑菇香气,可用于食品香精的调配中。