放射免疫测定毛发中激素含量作为研究动物内分泌生理方法的初步研究

本文应用放射免疫分析法测定日本大耳白兔和狗毛中孕酮和雌二醇的含量,结果表明:取200mg毛样加入4ml石油醚对孕酮进行提取,毛样提取液为0.01～ 0.50ml时,孕酮含量呈对数相关;而在0.01～0.20ml时,孕酮含量基本上呈线性相关.兔子腹部乳头周围毛样的孕酮含量显著高于背部毛样.注射外源性孕酮后,毛中孕酮的峰值出现较血浆中晚12h左右.毛样在18℃室温下保存10天对孕酮含量无影响.     

用高分辨率双晶X射线荧光法测定头发中硫的状态

本文用高分辨率双晶X射线荧光法研究了各种含硫化合物的SKα线的位移,并测定了中国人和日本人头发中硫的存在状态及各种状态的含量。结果表明,头发中硫主要以S~(2-)状态存在(平均占95.4%),其余是S~(6+)。发现男人头发中总硫量及S~(2-)状态的硫比同一国籍的女人高。还对12人的黑发与白发进行了对照分析,发现黑发中S~(2-)的含量明显高于白发,而S~(6+)低于白发。这可能由于随着头发变白,其中含—S—S—基团的蛋白质减少的缘故。     

REDUCING HAIRFALLING AND PILLING STUDY IN RABBIT HAIR/WOOL WORSTED KNITWEAR——CHOOSING AND EVALUATING OF FINISHING AGENT

In the paper, the effects of reducing hairfalling and pilling were compared in rabbit hair/woolworsted knitwear by adding various finishing agents. Reducing rates of hairfalling and pilling wereof 6.7％—66.7％ and 9.3％—73.5％ respectively, while fabric handle changed from grade 1 to grade5 in 12 treating method groups. To evaluate the severity of hairfalling and pilling and the conditionof fabric handle of knitwear objectively, quantitatively and comprehensively, we advocated usingthe concept of "geueral evaluating value(GEV)". The results indicated that GEVs of acrylategroups were low, but GEVs of silicone resin groups were high, especially the group with finishingagent solution containing 7％ silicone resin No.3 in which reducing rates of pilling and hairfallingwere of 53％ (National standard: grade 4.5) and 62％, respectively, and washing stability was verygood, while knitwear's fabric handle almost did not change.     

金银花新品系与主栽品种的表皮毛、叶色素及光合速率的比较分析

对金银花新品系与主栽品种的叶、茎、花蕾表面腺毛、非腺毛的密度、长度进行观察和分析,并测定其叶的叶绿素、花青素含量和光合速率,为良种的鉴别和鉴定提供依据.结果表明,豫金1号的表皮毛长度、密度均高于对照,豫金2号表皮毛除叶下表面非腺毛长度低于对照亚特红蕾1号,其他均高于对照;豫金1号、豫金2号的叶绿素含量和光合速率分别较对照高,说明在一定范围内,叶片的光合速率随叶绿素含量的增加而提高,叶片花青素含量与光合速率的相关系数达到显著水平(P0.05),花青素含量与光合速率之间呈负相关.结论:表皮毛的长度、密度等可作为金银花新品种鉴别指标的依据.     

Trace element characteristics of a Gorham-Stout Syndrome sufferer

Gorham-Stout Syndrome （GSS） is an infrequent and mysterious bone disease characterized by massive bone dissolving or even disappearing due to an unknown pathogeny. It is quite different from the Itai-itai disease and osteoporosis. In 2001, an 8-year-old boy from a small town in Xinjiang was found to get GSS disease. Some parts of his bones vanished without any external force. Results showed that the concentrations of Cd and Cu, especially Na and K in his hair were far higher than those of the healthy people, and the concentration of Cd was 2 times that of the reference while those of Cr and Zn were insufficient for health. The ratio of K/Na was also higher than that of healthy group. Four different ratios revealed weak bone growth potential and strong bone breakage occurred simultaneously in the GSS sufferer＇s skeletal system. It might be the synergistic effect of the trace elements leading to the baffling syndrome. Further investigation demonstrated that the trace elements can cause a series of diseases, including GSS disease and a typical rheumatoid arthritis （ARA）. Epidemiological investigation also proved that there were about 25% of the inhabitants in the town suffered from an ARA. All of these data implied there was significant relationship among Gorham-Stout Syndrome, ARA and prolapse of lumbar intervertebral disc.     

MtROP8 is involved in root hair development and the establishment of symbiotic interaction between Medicago truncatula and Sinorhizobium meliloti

Emerging evidence has demonstrated that ROP GTPases play important roles in symbiosis, but the molecular mechanisms on their regulation in symbiosis are largely unknown. In this study, we showed that MtROP8 is involved in the symbiotic interaction between Medicago truncatula and Sinorhizobium meliloti. Expression analyses showed that MtROP8 was down-regulated in the early infected roots, but significantly up-regulated in nodules compared to the roots. Phenotypic analysis of RNA inter- ference （RNAi）-mediated silencing of MtROP8 revealed that knock-down of MtROP8 expression resulted in various developmental defects of root hairs, including branched hairs, short bulbous root hairs, and even root hairs with apparent swollen bases, which were caused by the modi- fication of the distribution and the levels of reactive oxygen species （ROS）. Moreover, infection events were increased in transgenic roots harboring the MtROP8 RNAi construct in response to S. meliloti inoculation, concomitant with enhanced nodulation. These results indicate that MtROP8 participates in root hair development and the establishmentof the symbiotic interaction by regulating ROS production and distribution.     

非凸优化中毛发映射的若干性质

在伪锥条件下求解非凸域上函数极小化问题的同伦内点法中,如何构造和判别毛发映射是实现该算法的重要环节,文中给出了毛发映射的3个充分条件和相关性质,并确定了毛发映射与约束函数梯度是相容的判别条件。     

不同年龄C57BL/6J小鼠耳蜗毛细胞形态学变化的实验研究

目的通过不同年龄C57BL/6J小鼠耳蜗毛细胞形态学观察,探讨其毛细胞损失随年龄变化的趋势。方法选择C57BL/6J小鼠24只,分别于2月龄、4月龄、7月龄随机各选取8只动物处死取耳蜗,苏木精-伊红染色,制作耳蜗基底膜铺片,显微镜下观察耳蜗毛细胞的形态变化。结果C57BL/6J小鼠随着月龄的递增耳蜗毛细胞损伤呈加重的趋势:2月龄小鼠未见明显耳蜗毛细胞丢失;4月龄小鼠开始出现耳蜗外毛细胞损害,其损坏部位仅局限在耳蜗底回的起始端;7月龄小鼠耳蜗毛细胞损害比4月龄加重。这种随着年龄增长而发生的耳蜗损害遵循着从底回逐渐向顶回发展的规律,同时外毛细胞的损害比同区域的内毛细胞严重。结论C57BL/6J小鼠耳蜗毛细胞变化规律符合老年性耳聋特点,可以作为研究老年性耳聋的动物模型。     

牦牛绒衫的缩绒工艺与其服用性能的关系

研究了牦牛绒衫的缩绒工艺与其服用性能的关系 .测试了经不同缩绒工艺处理后的 1 8块小样的面积缩率、顶破强力、保暖率和拉伸弹性恢复率等指标 .统计分析了缩绒工艺参数间关系 ,得到了一些规律 .     

催化褪色光度法测定人发及粮食中的痕量铁

基于ｐＨ４．０ 的弱酸性介质中Ｆｅ（Ⅲ）对过氧化氢氧化日落黄褪色反应的催化作用,提出一种催化褪色光度法测定痕量铁的新方法,研究了该方法的适宜反应条件,方法的检出限为９．１×１０－ ７ｇ／ＬＦｅ（Ⅲ）,线性范围为０～１．２５μｇ／２５ｍ ｌＦｅ（Ⅲ）,方法用于人发及粮食中痕量铁的测定,结果满意．