克山病病区和常硒及低硒非病区儿童发铜,锌,铁,锰含量的测定

用原子吸收光谱法测定了克山病病区,常硒非病硒非病区儿童区Ｃｕ、Ｚｎ、Ｆｅ、Ｍｎ含量,结果表明：（１）低硒非病区组儿童发Ｃｕ、Ｚｎ、Ｆｅ、Ｍｎ含量与常硒非病区组无明显差异。（２）克山病病区组儿童ｕ、Ｚｎ、Ｍｎ民低硒和常硒非病区组儿童无明显差异。     

湛江市九年来六岁以下儿童发锌营养状况调查与分析

调查了１９９０￣１９９８年６月的１２６５１名０￣６岁儿童发锌营养状况,经统计学分析,表明,锌含量在１９９０￣１９９４年五年之间处于波动上升趋势,１９９５￣１９９８年四年间,波动幅度很小,似接近于平衡,前五年均值与后四年均值比较呈非常显著性差异（Ｐ〈０．００１）。     

阳江市幼儿头发中微量元素水平研究

测定了阳江市４０００多名１～７岁幼儿园幼儿发中的Ｚｎ、Ｆｅ、Ｃｕ、Ｃａ、Ｍｎ和Ｐｂ等６种元素含量,详细研究了其微量元素含量水平分布,发现该市幼儿上述元素含量明显偏离正常范围,特别是Ｚｎ和Ｐｂ的不合格率均在５０％以上。计算机多因素识别法研究指出,阳江市幼儿发中上述元素与微量元素总体水平较好的深圳市相比,存在着显著性差异,其微量元素谱确实有较大区别,样本点在模式空间的聚集域不同,周界比较清楚。     

厌食症患儿血清中铁锌铜锰硒含量的研究

１３７例厌食症患称血清中铁、锌、铜、锰、硒的含量对照组比较,研究结果揭示：①微量元素铁和铜含量明显升高,而锌、锰和硒含量明显降低,两者之间差异均有高度显著性,Ｐ〈０．０１;②临床上可根据上述元素改变的特点用于厌食症的早期辅助诊断和元素的平衡治疗。     

瑞安市0～7岁健康儿童头发中微量元素分析

用火焰原子吸收法检测了瑞安市５５２例０￣７岁儿童头发中锌、铁铜、钙必需元素含量,并探讨了元素含量与年龄,性别的关系,结果显示,元素含量与性别差异无显著意义;锌,钙元素含量随着年龄增长有相似变化,新生儿发铁含量明显低于其他年龄组。提示,在不同年龄儿童之间头发中元素含量存在着一定差异。     

Investigation of Chinese word recognition scores of children in primary school classroom with different speech sound pressure levels

Chinese word recognition (CWR) test was conducted by grades 3 and 5 children under the different conditions of reverberation time (RT), background noise level (BNL) and speech sound pressure level (SSPL) in three primary-school classrooms. The CWR scores and signal to noise ratios (SNRs) have been obtained at listening positions. Results show that the CWR score for grades 3 and 5 children increases with increase of SSPL, decrease of RT or increase of age, but it decreases with increase of BNL under the same conditions. For a mixed noise of 56 dBA (speech-spectrum-like noise and ambient noise), the CWR scores in the classroom for grades 3 and 5 children reach a peak at SNR of 15–20 dBA under the same RT and age of children condition. For the natural ambient noise, the CWR score for grades 3 and 5 children gradually increases with increase of the SNR. The high SSPL could not guarantee good CWR for children in classroom, which also depends on RT and BNL in classroom. When the classroom has long RT or high BNL, the increase of SSPL would not be necessarily to achieve better CWR. The novelty of the present study is to further evaluate and confirm the results under environments of real classrooms (not simulated room in laboratory).     

克山病病区和常硒及低硒非病区儿童发铜、锌、铁、猛含量测定

The content of Cu,Zn,Fe,Mn in hair of children from keshan disease(KD), a low-se non-endemic area and normal Se non-endemic area was determined by atomic absorption spectrophotometry. The resullt show that there are no distint differences in the content of Cu,Zn,Mn among these areas while the content of Fe in Keshan disease area was higher than that of the other 2 areas.     

超高效液相色谱-质谱法测定儿童产品中苏丹红玉、四溴双酚A和两种磷酸酯

建立了儿童产品中4种高关注物质(苏丹红玉、四溴双酚A、磷酸三(1,3-二氯-2-丙基)酯、磷酸三(2-氯丙基)酯)同时检测的超高效液相色谱-质谱检测方法。样品经乙腈超声萃取后,选择C18柱在3 min内分离4种待测物质。结果表明,本方法所测各物质的定量限为5~500μg/kg。在2~3个数量级浓度范围内,线性相关系数均在0.9995以上。在3个添加水平下,平均回收率为83.7%~97.8%,相对标准偏差(n=6)小于5%。本方法操作简单快捷,灵敏度、回收率高,选择性好,能满足实际工作的要求。     

陕西省克山病病区儿童和成人发锰含量测定

用原子吸收光谱法测定了陕西省彬县克山病房区克山病房户、非病户和非病区礼泉县对照户儿童和成人发锰含量．结果表明。1．病户儿童发锰明显高于非病区对照户，病区非病户儿童与病户或非病区对照户无明显差异；2．3组成人发锰差异不明显；3．病区病户和非病户儿童发锰均明显高于成人，非病区对照户儿童和成人发锰含量无显著差异．     

深圳市712名儿童发铁含量的研究

报道了深圳南山区712名0～6岁儿童头发中铁的平均值为31．36×10-6.男童缺铁106例，占29.2％:女童缺铁171例．占50％。临床上表刚，有大部分几童存在缺铁性贫血但也有一些为非缺铁性贫血。女童缺铁明显高于男童．有显著性意义：发铁指标可用作诊断由缺铁而引起的一些疾病。