石墨探针—石墨炉原子吸收光谱测定人发中痕量镉研究

石墨探针原子化技术是一种实现等温原子化,改善灵敏度的行之有效的方法．本文采用此方法对痕量镉进行了一系列条件试验．镉浓度与峰面积吸光度在０～５０ｎｇ·ｍＬ－１范围内呈良好的线性关系,检出限为１８６ｐｇ,特征量为２４８ｐｇ,相对标准偏差为２１％．并成功地测定了发标和发样中痕量镉的含量,回收率为９６３％～１０３７％．该方法灵敏度高,操作简单、快速,结果满意．     

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.     

兔羊毛精纺针织品防掉毛防起球研究——防掉毛防起球整理剂的优选与评价

本文通过添加不同整理剂对兔羊毛精纺针织品进行防掉毛、防起球研究。12种处理方案的掉毛改善率为6.7～66.7％,起球改善率为9.3％～73.5％,织物风格变化从1级到5级。为全面、客观、定量地对经各种处理工艺后,织物的起球程度、掉毛量及织物风格作综合评价,提出了综合评定值。丙烯酸酯树脂处理组综合评定值较低,3号硅酮树脂处理组综合评定值较高,其中处理液浓度为7％的3号硅酮处理组,织物风格基本不变,起球改善率与掉毛改善率分别为53％和62％,(按GB4802.3-84标准测试与评定,起球达4.5级),且耐水洗性能良好。     

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.     

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．     

浅谈公路工程施工项目结算纠纷的防范对策

公路工程施工项目结算是公路工程合同管理的重要环节,业主方、监理方及施工方对此都非常重视。文章结合作者多年来在办理高速公路项目结算工作的实践,针对公路工程常见的结算纠纷现象提出了一些行之有效的防范对策。     

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。     

结合肤色和头发检测的人头区域检测方法

针对具有严重遮挡的密集人群检测,提出一种结合肤色检测和头发检测的人头区域检测方法. 首先采用多色彩空间肤色检测方法提取图像中的肤色区域;然后根据头发的发色和纹理边缘两个特征建立混合高斯模型,对发色区域进行分割和提取;最后融合以上两检测区域实现人头区域的检测. 实验结果表明,该方法可以得到比较准确而完整的目标区域,具有较高的实用性.