调压阀在老挝南奔水电站的应用

介绍了调压阀在老挝南奔水电站的应用情况,并通过现场试验检验了调压阀的安全可靠性。该应用实例证明,采用调压阀可以消除因机组紧急停机引起的电站引水系统压力过度上升,是中小水电站替代调压井的成熟技术,值得推广使用。     

水解酸化-SBR-微滤处理造纸中段废水试验研究

采用"水解酸化+SBR+微滤"工艺处理制浆造纸中段废水。试验结果表明,在原废水CODCr为1 100~1 500 mg/L、pH为6.8~7.2,水解工艺水温为25~30℃、HRT为6 h、碳氮比为60∶1,SBR工艺反应时间为8 h、温度为34~38℃的条件下,组合工艺对废水CODCr、氨氮、总磷、SS和TOC的平均去除率分别为91.8%、93.8%、94.7%、100%和91.4%,出水水质达到《制浆造纸工业水污染物排放标准》(GB 3544—2008)的要求。微滤膜置于生化反应后,降低了膜污染,同时对污染物质有一定的拦截效果。     

Singly ionized double-donor complex in vertically coupled quantum dots

ABSTRACT: The electronic states of a singly ionized on-axis double-donor complex (D2+) confined in two identical vertically coupled, axially symmetrical quantum dots in a threading magnetic field are calculated. The solutions of the Schrodinger equation are obtained by a variational separation of variables in the adiabatic limit. Numerical results are shown for bonding and antibonding lowest-lying artificial molecule states corresponding to different quantum dot morphologies, dimensions, separation between them, thicknesses of the wetting layers, and magnetic field strength.     

Gauging food and nutritional care quality in hospitals

ABSTRACT: BACKGROUND: Food and nutritional care quality must be assessed and scored, so as to improve health institution efficacy. This study aimed to detect and compare actions related to food and nutritional care quality in public and private hospitals. METHODS: Investigation of the Hospital Food and Nutrition Service (HFNS) of 37 hospitals by means of structured interviews assessing two quality control corpora, namely nutritional care quality (NCQ) and hospital food service quality (FSQ). HFNS was also evaluated with respect to human resources per hospital bed and per produced meal. RESULTS: Comparison between public and private institutions revealed that there was a statistically significant difference between the number of hospital beds per HFNS staff member (p = 0.02) and per dietitian (p < 0.01). The mean compliance with NCQ criteria in public and private institutions was 51.8% and 41.6%, respectively. The percentage of public and private health institutions in conformity with FSQ criteria was 42.4% and 49.1%, respectively. Most of the actions comprising each corpus, NCQ and FSQ, varied considerably between the two types of institution. NCQ was positively influenced by hospital type (general) and presence of a clinical dietitian. FSQ was affected by institution size: large and medium-sized hospitals were significantly better than small ones. CONCLUSIONS: Food and nutritional care in hospital is still incipient, and actions concerning both nutritional care and food service take place on an irregular basis. It is clear that the design of food and nutritional care in hospital indicators is mandatory, and that guidelines for the development of actions as well as qualification and assessment of nutritional care are urgent.     

红河流域径流演变分异及其特征

红河流域径流演变分异研究对于揭示流域径流的形成、演变规律及跨境水管理具有重要意义。选取红河流域9个代表站点,利用累积距平法、滑动t检验和Mann-Kendall-Sneyers法研究了红河流域的径流演变分异。结果表明,径流演变空间差异显著,各控制断面波动不一致;流域各站点(除大东勇站)均出现径流突变,但突变时间不一致,且越往下游,突变时间越晚;此外,各站点丰枯转化时段不一致。     

国内生物医药园区的发展简况

<正>国内园区简况我国生物医药产业园是伴随着高新技术区的发展而不断发展的。20世纪90年代初,国家做出了加速发展高新技术产业的战略决策。1991年以来,国务院先后共批准建立了56个国家级高新技术产业开发区,其中包括2009年5月新成立的泰州国家医药高新技术产业开发区,这也是我国首个国家级医药高新区。目前我国国家级高新区和经济技术开发区已经超过100个,均涉及生物技术产业。2006年通过国家发展和改革委员会审核的1300多家省级开发区中,有300多家涉及生物技术专业。据不完全统计,我国现有省级以上     

用于预警和安保系统的新型发光复合高分子纤维

新型发光、无机和有机纳米型染料主要用于聚对苯二甲酸乙二醇酯（PET）纤维的制备。PET纤维是制作用于预警和安保系统的纤维织物的原材料。具有发光性质的纳米染料的制备方法主要有两种：一种为自下而上,沉淀法合成;另一种为自上而下,通过反应型研磨得到。下述的纳米染料是硫化锌（ZnS）,同时还掺杂有铜或锰、铝酸锶,还可掺杂铕和镝。此外,还对有机染料和颜料（醛连氮和二萘嵌苯）进行研究,还将其包裹于硅纳米粒子中并进行相关研究。制得的纳米粒子混入高分子熔体中,通过熔融挤出得到成品丝。该过程中所使用的纳米颜料可混入母粒中,也可制成液状使用。最后进行成品丝变形工艺研究,并加工成纺织面料。纳米发光颜料的加入实现了低染料剂量下的高发光性。与已投入使用的传统体系相比,采用纳米发光颜料的体系具有更好的光、热和湿牢度。     

以酒石酸为骨架的新型阳离子脂质材料的合成

以天然产物L-(+)-酒石酸为骨架,以氨基己酸、辛胺、十二胺或十六胺为原料成功构建了3种新型阳离子脂质材料。所得产物结构经~1HNMR、IR和质谱等进行了表征。结果表明,所得中间体和阳离子脂质材料的结构与目标化合物结构相符,为基因治疗中阳离子脂质体的制备提供了载体材料。     

NiCo2S4电极材料的研究进展

从NiCo₂S₄电极材料的形貌调控、复合电极材料的设计与开发和缺陷的引入等方面进行了简要阐述,展望了NiCo₂S₄电极材料在超级电容器领域的研究趋势。