Investigation of iodine concentration in salt,water and soil along the coast of Zhejiang,China

Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6～84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin'an in mountain area (P＜0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P＜0.01). (3) Soil iodine value was 0.11～2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.     

Comparative study of Anaplasma parasites in tick carrying buffaloes and cattle

INTRODUCTION The world population of buffaloes(Bubalus bubalis)has been estimated at over172million head,more than97%(167.6million)of which are in Asia and the Pacific region,mainly in India(97.7million)and Pakistan(25.5million)(FAO,2004).About98%of buffaloes in the region are raised by small farmers owning less than two hectares of land and less than five buffaloes(Mudgal,1992).In general,the water buffalo is regarded as more productive,healthier and more useful than the cow,especiall…     

关于一类具有垂直传染与治疗SIR模型产生后向分支的研究

考虑了有限治疗资源和垂直传染的一类传染病模型,当染病个体数量小于某确定值时,治疗康复人数与染病个体数成比例;当染病个体数量大于某确定值时,治疗康复人数是确定常数值.确定了模型的基本再生数R0.在一定条件下,当R0〉1时,地方病平衡点E＊是渐进稳定的;当R0〈1时,后向分支就产生了.     

论大学教师学术创新力的基础:学术综合交叉能力

学术综合交叉能力是大学教师创新力的重要心理基础。本文从大学教师学术综合交叉能力的必要性、大学教师学术综合交叉能力的内涵以及大学教师学术综合交叉能力提高的策略三方面论述了大学教师创新力的重要基础。大学教师学术综合交叉能力的研究应该引起大学教师学术创新力研究领域的关注。     

英汉委婉语比较

委婉语是英汉语言中共同的语言现象,它源于社会禁忌,既有宗教性、阶级性,又有时代性,在不同程度上反映了某一国家、地域和时代所认同的思维模式、价值观和道德观等;同时,折射出中西方形态各异的社会文化背景,反映出形形色色的社会心理状态和语言文化内涵。     

这些食物防过敏

很多妈妈喜欢在春季带宝宝外出游玩,沐浴阳光。可殊不知,在这个季节,各种花粉会在空气中形成飘浮物,对于那些抵抗力不强的宝宝来讲,吸入体内就容易引起呼吸道及皮肤过敏。不过,妈妈们可以通过食物来预防和辅助治疗宝宝的过敏。蜂蜜:蜂蜜中含有微量的蜂毒,而蜂毒在临床医学中常被用于支气管哮喘等过敏性疾病的治疗。另外,蜂蜜里还含有一定的花粉颗粒,经常喝会对花粉过敏产生一定的     

浅谈体育教师情绪调控的策略

在日常生活和教学工作中,身为教书育人的教师总会遇到这样或那样的矛盾,比如家庭矛盾、同事之间的矛盾、工作中的冲突、师生间的矛盾、身心疾病等。上述这些因素将产生不良的心理刺激,从而造成内心不愉快,引起情绪反应。实践表明,若长期处在紧张状态和强烈的情绪波动,不仅会造成生活规律失调,机体某些功能紊乱,给身体带来众多疾患。如果教师将不良情绪和消极心理带入课堂,还将影响教学效果和融洽的教学环境,最终导致教学失败。     

夏末秋初须防肠道疾病

每年的夏末秋初都是一个比较关键的时令．不少抵抗力弱的人开始受到疾病的“偷袭”,因此患病者人数增多。专家提醒同学们,应注意预防感冒及肠胃疾病,保持室内空气流通。     

“类庄家”罗伟广——新价值类庄股运作调查

我觉得中国主流的投资文化都是短视的、从众的,就是这肥沃的土壤成就了我;坦诚的说,我这种方法,在中国香港、在美国赚不到什么钱,也仅能在中国赚钱。——罗伟广     

不同边界条件下交叉三角形波纹流道传热与流动的数据处理

为准确量化交叉三角形波纹流道的强化传热性能,除了需要进行数值模拟,还需要对所获得的数据进行正确计算处理.针对两种构造不同的交叉三角形波纹流道A和流道B,在模拟时选取不同的壁面给热条件,将恒热流密度壁面与等效恒温壁面的数值模拟结果进行了对比,并借助合适的数据处理方法,得到各自条件下的平均摩擦系数fL和平均努塞尔数NuL.结果表明,高热流密度时流道B的传热强化明显,低热流密度时流道A的传热减弱明显.对任何一类流道而言,边界给热条件的变化对流动摩擦阻力影响很小,但流道内的流动和传热之间其实是具有复杂的相互关联性的.