社会化媒体是一种给与用户极大参与空间的新型在线媒体。突发公共卫生事件与社会化媒体的传播特点相契合,应主动利用社会化媒体,使其在突发公共卫生事件处置过程中发挥舆论传播、舆论导向、舆论监督等重要作用。

社会科学方法的研究是人们从相对完整、客观以及准确等方面把握客观世界的本质与规律的一种方法，在环境科学中应用社会科学技术已取得的很大的成就，社会科学技术在将来环境医学的发展中有着重大作用。

<正>微博,即微博客(MicroBlog)的简称,是一个基于用户关系的分享、传播以及获取信息的平台,用户可以通过WEB、WAP以及各种客户端组建个人社区,以140字左右的文字更新信息,并实现即时分享[1]。微博可以发布图片、分享视频,凭借其短小、快捷的传播特点以及网页、客户端、手机端多种多样、随时随地的发布形式,一跃成为中国民众交流信息和表达观点的重要平台。互联网

眼晶状体是对电离辐射最敏感的人体组织之一,低剂量电离辐射可引起白内障。本文综述了近年来医疗照射、职业照射、公众照射领域低剂量电离辐射对白内障影响的主要流行病学研究结果,提出今后研究中应注意的问题。

Objective To investigate and compare the prevalence of cataracts among residents in high background radiation area(HBRA) and adjacent control area.Methods A total of 194 residents aged 50 and older were selected from three villages in HBRA and one village in control area by means of cluster sampling,and questionnaire survey as well as cataract examination were conducted.The association between cataracts and risk factors was analyzed using logistic regression method.Results After adjusting for age and gender,the OR values were 2.93(95% CI:1.19-7.17),1.51(95% CI:0.15-15.24),2.93(95% CI:1.20-7.17) and 2.35(95% CI:0.59-9.42) respectively for cataracts,cortical cataracts,nuclear cataracts and posterior capsular cataracts.Conclusions Long-term with low-dose ionizing radiation is a major risk factor of cataracts.

目的简要概括我国疾控机构公共卫生技术支持工作中的矛盾,分析这些矛盾并提出对策、建议。方法总结近年来国家疾控中心的公共卫生技术支持工作和对全国省级疾控机构公共卫生工作调研的信息。结果在健康危害因素监测、健康危害因素风险评估、检验出证、技术仲裁、技术咨询以及参与法规标准的制定和宣传等领域,各级疾控机构做了大量的公共卫生技术支持工作,但在职能定位、经费保障、能力建设以及部门工作协调等方面仍存在着突出问题。结论进一步明确职责和定位,规范疾控机构的公共卫生技术支持工作,建立专门的经费保障机制和工作沟通机制,不断地提高疾控机构的公共卫生技术支持能力。

目的通过调查全国省级疾病预防控制中心成立前(防疫站时)、成立时和目前公共卫生(特指环境卫生、营养与食品卫生、职业卫生和放射卫生)人员状况,掌握疾控中心成立前后公共卫生人员变化情况,为加强公共卫生人员队伍建设提供科学依据。方法对全国省级疾病预防控制中心进行问卷调查,对调查数据进行统计分析。结果疾病预防控制体制和卫生监督体制改革以后,省级疾控中心在编人员增加了22.6%,公共卫生人员中的公卫人员却减少了36.7%,其中环境卫生人员减少了52.9%,营养与食品卫生人员减少了62.8%,职业卫生人员增加了16.4%,放射卫生人员减少了15%;公共卫生人员中的检验人员增加了5.3%,其中毒理学评价检测人员增加了38.0%;卫生学理化检验人员增加了11.8%,相关微生物检验人员减少了12.0%,放射卫生检测人员减少了42.9%。结论环境卫生、营养与食品卫生、职业卫生、放射卫生等公共卫生人员力量亟待加强。

Objective To study the effect of 915 MHz electromagnetic fields on the concentration of neurotransmitters in the brain tissue of the mice,to investigate the mechanism of effects of microwave on central nervous system(CNS). Methods 30 one-month-old SPF-level Kunming male mice were divided randomly into high-dose group, low-dose group and control group. From 9 o'clock everyday in the morning,they were exposed to 915 MHz electromagnetic fields for 2 hours in turn during the continuous 30 days,the power density of which were 5 mW/cm2,2 mW/cm2 and 0 mW/cm2. The concentration of monoamine neurotransmitters(NE, DA, 5-HT) and metabolite (DOPAC, 5-HIAA) in the cerebral cortex and hippocampus were detected by high performance liquid chromatography with electrochemical detector(HPLC-ECD).The concentration of Ach in the remnant brain tissue was detected by spectrophotometer. Results The concentration of monoamine neurotransmitters(NE,DA,5-HT),DOPAC (metabolite of DA) and 5-HIAA(metabolite of 5-HT) in the cerebral cortex were not significantly different among the three groups using the analysis of variance (P0.05). The concentration of monoamine neurotransmitters(NE,5-HT),DOPAC and 5-HIAA in the hippocampus were not significantly different(P0.05).The concentration of Ach in the remnant brain tissue of the three groups was not significantly different(P0.05). Conclusion After exposing to the 915 MHz electromagnetic fields, the changes of the concentration of monoamine neurotransmitters in the cerebral cortex and hippocampus, and the changes of the concentration of Ach in the remnant brain tissue could not be found.

With the scientific and technological progress and rapid development of the social economy, the extensive application of various electronic equipments has gradually intensified the possibility of ELF-EMF(extreme low frequency electromagnetic fields) exposure, the relationship between ELF-EMF exposure and health effects attracted more and more eyes and many corresponding researches have been finished. In recent years, a lot of epidemiological researches about the relationship between ELF-EMF and leukemia, brain tumor, breast cancer and other tumors have been done at home and abroad, in the present paper the research results were reviewed and the possible mechanism of the effect of ELF-EMF exposure on tumors was discussed.