Nutrition KAP survey on different occupational populations and its effect on disease prevention

随着我国经济的快速发展,人们生活方式、膳食模式和疾病谱发生了巨大变化,营养不平衡和慢性非传染性疾病已成为我国主要的公共卫生问题。其中,不同职业与营养相关性疾病一直是营养学界关注的问题之一。通过对不同职业人群营养知识、态度、行为的调查,了解各职业人群营养知识、态度、行为及其影响因素,及时采取有效措施如营养干预、健康教育等,提高各职业人群营养素养,改善其营养状况,对于营养相关疾病的防制有一定作用。作者主要介绍了近年来关于不同职业人群营养状况研究及营养知识态度行为调查分析,为职业人群营养相关疾病的防制提供参考依据。With the rapid development of the economy in our country,the life styles,dietary patterns and disease spectrum have changed vastly, while the nutritional imbalance and chronic non-communicable diseases have become major public health problems in China.Among them,the relationship between occupation and nutrition-related diseases has always been one of the severe problems in nutrition science.Through the nutrition knowledge-attitude-behavior(KAP)survey among different occupational populations,to understand the nutrition KAP of different occupational populations and its influencing factors,carry out the effective measures such as nutrition intervention and health education,enhance the nutritive condition of different occupational groups,and improve their nutritional quality have some effect to prevent the nutrition-related diseases.The authors mainly introduce the researches on nutritional conditions and investigation on nutrition KAP of different occupational populations in the recent years,and provide the reference for prevention and control of nutrition-related diseases among occupational populations.福建省卫生厅青年科研基金(项目编号:2012-2-100

Benthic foraminiferal assemblages in the western Arctic surface sediments and their paleoenrivonmental implications

通过对中国第1~4次北极考察在西北冰洋采集的表层沉积物中底栖有孔虫丰度及其优势种分布特征与环境因素关系的综合研究发现,楚科奇海区低的底栖有孔虫丰度主要受较高的陆源物质输入的稀释作用影响;楚科奇海台和阿尔法脊较高的底栖有孔虫丰度主要受到暖而咸的大西洋中层水的影响;受碳酸钙溶解作用影响的门捷列夫深海平原和加拿大海盆底栖有孔虫丰度较低,并且水深3 597M的站位出现了似瓷质壳的PyrgO WIllIAMSOnI和QuInQuElOCulInA OrIEnTAlIS,说明该区的CCd深度大于3 600M。根据底栖有孔虫7个优势属种的百分含量分布特征可以划分出5个区域组合:南楚科奇海陆架-白令海峡组合以优势种ElPHIdIuM EXCAVATuM和buCCEllA frIgIdA为特征,可能反映受白令海陆架水影响的浅水环境;阿拉斯加沿岸-波弗特海组合以优势种flOrIluS SCAPHuS和ElPHIdIuM AlbIuMbIlICATuM为特征,可能反映受季节性海冰融化,低盐的阿拉斯加沿岸流以及河流淡水输入的低盐环境;大西洋中层水组合以优势种CASSIdulInA lAEVIgATA为特征,可能反映高温高盐的大西洋中层水影响的环境;北极深层水组合以优势种CIbICIdES WuEllErSTOrfI为特征,可能反映水深大于1 500M低温高盐的北极深层水环境;门捷列夫深海平原组合以优势种OrIdOrSAlIS uMbOnATuS为特征,可能反映低营养的底层水环境。Benthic foraminiferal assemblages in 139 western Arctic surface sediment samples recovered during the CHINAREⅠ~Ⅳcruises were studied.The relative abundances of each species were calculated and according to the spatial distribution pattern of dominant species,benthic foraminiferal assemblages were divided to determine the relationship between the assemblage and environmental parameters.Our results show that the spatial distribution pattern of low benthic foraminiferal abundance in the Chukchi shelf area is controlled by high terrigenous matter input.In Chukchi Plateau and Alpha ridge,high benthic foraminiferal abundance is influenced by the warm and saline intermediate Atlantic water.In the Mendeleev Abyssal Plain and Canadian Basin,low benthic foraminiferal abundance is influenced by calcium carbonate dissolution and the appearance of porcelain-like species Pyrgo williamsoni and Quinqueloculina orientalis at 3 597 msites indicates the carbonate compensate depth(CCD)is greater than3 600m.Five assemblages related to spatial environmental factors can be determined by 7 dominant species:Southern Chukchi shelf-Bering Strait assemblage is dominantly characterized by Elphidium excavatumand Buccella frigida,representing the influence of shallow Bering Sea Shelf Water;Alaska Coast-Beaufort Sea assemblage is dominantly characterized by Florilus scaphus-Elphidium albiumbilicatum,indicating the low salinity environment due to seasonal sea ice melting and/or Alaska Coastal Current or riverine input;Atlantic Intermediate Water assemblage is dominated by Cassidulina laevigata,representing warm saline Atlantic Intermediate Water;Arctic Deep Water assemblage is dominated by Cibicides wuellerstorfi,reflecting the low temperature and high salinity environment greater than 1 500m;Mendeleev Abyssal Plain assemblage is dominated by Oridorsalis umbonatus,showing the oligotrophic bottom water environment.国家自然科学基金重点项目(41030859); 南北极环境综合考察与评估专项——2012年度北极海域海洋地质考察(CHINARE2012-03-02); 中国地质调查局项目(水[2012]01-011-05

分子束外延生长的（GaAs1-xSbx／InyGa1-yAs）／GaAs量子阱光致发光谱研究

报道了(GaAs1-xSbx／InyGa1-yAs)／GaAs量子阱结构的分子束外延生长与光致发光谱研究结果．变温与变激发功率光致发光谱的研究表明了此结构为二型量子阱发光性质．讨论了光谱双峰结构的跃迁机制．通过优化生长条件，获得了室温1．31μm发光

焦化废水强化处理关键技术研究与探讨

介绍了通过真空碳酸钾脱硫废液预处理工艺的开发和专用药剂的应用,可分别去除废液中99%以上的硫化物和90%以上的氰化物;研究了A2/O2强化生物脱氮技术,COD和氨氮去除率均可在95%以上;经开发的专用高效脱氰混凝剂,COD去除率达40%以上,总氰化物降至0.2mg/L以下。研制了高效非均相臭氧催化剂,结合开发的两段法催化氧化设备可使COD去除率在50%以上,臭氧利用率达80%以上,示范工程出水各项指标均可达到《炼焦化学工业污染物排放标准》(GB16171—2012)要求

焦化废水强化处理关键技术研究与探讨

介绍了通过真空碳酸钾脱硫废液预处理工艺的开发和专用药剂的应用,可分别去除废液中99%以上的硫化物和90%以上的氰化物;研究了A2/O2强化生物脱氮技术,COD和氨氮去除率均可在95%以上;经开发的专用高效脱氰混凝剂,COD去除率达40%以上,总氰化物降至0.2mg/L以下。研制了高效非均相臭氧催化剂,结合开发的两段法催化氧化设备可使COD去除率在50%以上,臭氧利用率达80%以上,示范工程出水各项指标均可达到《炼焦化学工业污染物排放标准》(GB16171—2012)要求

大连极紫外相干光源

先进光源的发展在前沿科学研究中发挥的作用越来越重要。近十年来,飞速发展的自由电子激光技术为科学家们提供了探索未知世界、发现新科学规律和实现技术变革的重要工具。建成的大连极紫外(EUV)相干光源的运行波段为50~150nm,单脉冲能量大于100μJ,且可提供10-12 s和10-13 s量级的超快激光脉冲,是我国第一台自由电子激光用户装置,并且是国际上唯一运行在极紫外波段的自由电子激光用户装置,在世界范围内为用户提供具有高峰值亮度和超短脉冲的极紫外激光。大连EUV相干光源是由国家自然科学基金委资助、由中国科学院大连化学物理研究所和上海应用物理研究所共同承担的重大科学仪器研制项目,目标是打造一个以先进极紫外光源为核心、主要用于能源基础科学研究的光子科学平台

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel