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.     

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。     

奇妙的人体(十) 流动的血液和跳动的心脏

血液是在我们身体的心脏和血管内流动的不透明的液体,它是红色的。血液不停地流动着。把血液从心脏运送到全身各部分的血管是动脉,而输送血液返回心脏的血管是静脉。     

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     

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。     

上苍公正观的发展研究与启示

面对一个人先前的过失行为与后来遭到的灾祸,儿童会做出上苍公正的判断,认为灾祸是由先前过失行为造成,是上苍的惩罚.文章回顾了上苍公正观的内涵和年龄发展趋势,上苍公正与公正世界信念、疾病认知的相关研究,并提出未来的研究应考虑概念范畴、方法控制、文化背景等多方面的因素,通过适当的教育干预措施促进儿童公正观念的发展.     

例析神经系统受损引起的几种疾病

一、植物人 一些人大脑皮层功能严重受损,处于不可逆的深昏迷状态,并丧失意识活动,但皮质下中枢可维持自主呼吸运动和心跳,此种状态称“植物状态”,处于此种状态的患者称“植物人”。     

Yangxueqingnao particles inhibit rat vascular smooth muscle cell proliferation induced by lysophosphatidic acid

Objective: To observe the effect of Yangxueqingnao particles on rat vascular smooth muscle cell (VSMC) proliferation induced by lysophosphatidic acid (LPA). Methods: The amount of3H-TdR (3H-thymidine) admixed in cultured rat VSMC was measured and mitogen-activated protein kinase (MAPK) activity and lipid peroxidation end product malondialdehyde (MDA)content of the VSMC were assayed. Results: 1×10-9, 1×10-8, 1×10-7 mol/L LPA in a concentration dependent manner, induced the amount of 3H-TdR admixed, MAP kinase activity, and MDA content of the cultured rat VSMC to increase. However, 5%, 10%,and 15% Yangxueqingnao serum preincubation resulted in a decrease of 23.0%, 42.0%, and 52.0% (P＜0.01) respectively in the amount of 3H-TdR admixed, a decline in VSMC MAP kinase activity of 13.9% (P＜0.05), 29.6% (P＜0.01), and 48.9% (P＜0.01)respectively, and also, a decrease in MDA content of VSMC of 19.4%, 24.7%, and 43.2% (P＜0.01) respectively, in the 1×10-7mol/L LPA-treated VSMC. Conclusions: LPA activates the proliferation and lipid peroxidation of VSMC in a concentration dependent manner. The LPA-induced VSMC proliferation is related to the activity of MAP kinases, enzymes involved in an intracellular signalling pathway. The results of the present study showed that Yangxueqingnao particles can effectively inhibit LPA-induced VSMC proliferation, MAP kinase activation, and reduce lipid peroxidative lesion.     

带血管蒂组织瓣移位修复股骨头缺血性坏死的研究现状

股骨头缺血性坏死的临床治疗中带血管蒂组织瓣转位修复术收效良好。本文就股骨头血供特点、关节囊附着特点和几种股骨头修复术能带血管蒂转位的供瓣区解剖特点作一综述，为临床设计操作方便、损伤小、血供丰富的组织瓣转位术提供解剖学依据。