Anodic bonding of glass-silicon-glass three-layer structure with Si_3N_4 thin film

为了获得高品质的带有SI3n4薄膜三层(玻璃—硅—玻璃)的阳极键合结构,对阳极键合的相关工艺参数进行了研究;设计搭建了实验平台并采用点阴极,以实时观察键合界面是否达到同形质的黑色从而判断阳极键合质量,对键合后的样品进行拉力测试,研究表明:当采用键合温度为400℃,电压为1200 V,压力为450 PA,可获得键合面积大于90%的带有SI3n4薄膜的三层阳极键合结构。In order to obtain high quality of anodic bonding structure of glass-silicon-glass with Si3N4 thin film,related process parameters of anodic bonding is researched.Design and build up experimental platform and use point cathode to real-time observe whether if the bonding interface is black of the same character so as to judge quality of anodic bonding,and bonded samples are tested on tension.The research show that more than 90 % wafer area can be obtained for glass-silicon-silicon three-layer anodic bonding with Si3N4 structure when the voltage and pressure is 1 200V and 450 Pa respectively,at 400 ℃.福建省重大科技项目前期研究资助项目(2009HZ1021); 国家“863”计划专题资助项目(2007AA04Z330

Influence of Different Enzyme Preparation on Premature Yeast Flocculation activity of PYF Factor from Malt

选取2种不同复合酶制剂,采用乙醇沉淀法提取出麦芽中PYF因子,通过模拟糖化条件及添加不同酶量来考察外加酶是否对PYF因子具有水解能力。结果发现,与对照组PYF活力值(F=78.79)相比,不同添加量的2种复合酶与PYF因子作用后PYF活力值没有发生显著变化(P>0.05),即PYF因子是一种结构特殊、复合酶不能水解的多糖大分子。Through simulating saccharification condition and adding different enzyme amount,the hydrolysis abilities of 2 different kinds of enzyme preparation on PYF factor,which was extracted from malt by ethanol precipitation, were measured and compared.The results showed that compared with the PYF activity value(F=78.79) of control group,PYF activity value didn't change significantly(P>0.05)after 2 kinds of enzyme with different adding amounts acted with PYF factor,namely that PYF factor was a kind of polysaccharide with a higher molecular weight and special structure and couldn't be hydrolyzed by enzyme

Photo-generated dinuclear {Eu(II)}2 active sites for selective CO2 reduction in a photosensitizing metal-organic framework

利用太阳光驱动CO2还原不仅可降低大气中CO2浓度，而且可以生成重要的化工原料，是缓解气候变暖和开发新能源的理想途径之一。然而如何制备高效光催化剂将CO2高选择性地转化为高附加值的化学产品极具挑战性。课题组巧妙地将具有催化活性的稀土簇合物与光敏配体组装在一起，合成了具有大孔结构的稀土Eu-Ru(phen)3-MOF催化剂，实现了可见光驱动的CO2到甲酸盐的高效选择性转化。研究表明，该材料光催化生成甲酸盐的反应速率可达到321.9 μmol h−1 mmolMOF−1，这是至今为止报道的光催化还原CO2转化为甲酸盐活性最高的MOFs催化剂。 该项研究工作由博士生闫志浩完成，博士生杜明浩参与部分表征工作；中国科学院大连化学物理研究所金盛烨研究员、刘俊学博士在瞬态光谱表征中给予了支持；我校化学化工学院汪骋教授在数据分析过程中给予大量帮助；理论计算由浙江工业大学庄桂林副教授完成。【Abstract】Photocatalytic reduction of CO2 is a promising approach to achieve solar-to-chemical energy conversion. However, traditional catalysts usually suffer from low efficiency, poor stability, and selectivity. Here we demonstrate that a large porous and stable metal-organic framework featuring dinuclear Eu(Ⅲ)2 clusters as connecting nodes and Ru(phen)3 -derived ligands as linkers is constructed to catalyze visible-light-driven CO2 reduction. Photo-excitation of the metalloligands initiates electron injection into the nodes to generate dinuclear {Eu(Ⅱ)} 2 active sites, which can selectively reduce CO2 to formate in a two-electron process with a remarkable rate of 321.9μmolh −1 mmol MOF −1 . The electron transfer from Ru metalloligands to Eu(Ⅲ)2 catalytic centers are studied via transient absorption and theoretical calculations, shedding light on the photocatalytic mechanism. This work highlights opportunities in photo- generation of highly active lanthanide clusters stabilized in MOFs, which not only enables efficient photocatalysis but also facilitates mechanistic investigation of photo-driven charge separation processes.We are grateful for the financial support from the 973 project (Grant 2014CB845601) of the Ministry of Science and Technology of China, the National Natural Science Foundation of China (Grants no. 21422106, 21673184, 21431005, 21721001, and 21390391) and the Fok Ying Tong Education Foundation (151013). We thank Dr. Wen-Ming Qin and the staffs from the BL17B beamline of National Center for Protein Sciences Shanghai at Shanghai Synchrotron Radiation Facility for assistance during data collection; we also thank Miss Ying-Zi Han for helpful measurement on ESI-MS. We also gratefully acknowledge Mr Xuefu Hu for helpful measurement on time-resolved PL and Miss Rong Chen for her assistance on CV measurement and analysis. 研究工作得到科技部（项目批准号：2014CB845601）、国家自然科学基金委（项目批准号：21422106、21673184、21431005、21721001、21390391）、教育部霍英东基金会青年教师基金（项目批准号：151013）等资助

Content and distribution of unprotected soil organic carbon in natural and monoculture plantation forests of Castanopsis kawakamii in subtropical China

通过对福建三明格氏栲天然林及在其采伐迹地上营造的 33年生格氏栲人工林和杉木人工林土壤非保护性有机 C含量及分配的研究 ,结果表明 ,格氏栲天然林 0～ 10 0 cm土层内土壤有机 C贮量分别是格氏栲人工林和杉木人工林的 1.17倍和1.35倍 ,轻组有机 C贮量分别是后两者的 1.6 4倍和 2 .16倍 ,而颗粒有机 C贮量则分别是后两者的 1.6 0倍和 3.4 3倍 ,其土壤轻组有机 C和颗粒有机 C的分配比例亦显著高于后两者。不同林分间差异均以 0～ 10 cm土层为最大 ,该层格氏栲天然林土壤有机 C含量分别是格氏栲和杉木人工林的 1.5 2倍和 1.6 3倍 ,轻组有机 C含量分别是后两者的 1.70倍和 2 .14倍 ,而颗粒有机C含量则分别是后两者的 2 .18倍和 4 .85倍。这种差异与经营人工林时进行皆伐、炼山、整地等对林地干扰强度较大、幼林郁闭前产生水土流失及凋落物、枯死细根归还量减少等有关。土壤轻组有机 C和颗粒有机 C可作为土壤有机 C库变化的较为敏感指标 ,同时亦可指示土壤肥力演变。 【英文摘要】 Soil organic carbon (SOC) pool plays an important role in mitigating the rise of atmospheric CO_2. Due to its relatively unprotected (biochemical and physical) status, the unprotected SOC, be measured as either the light fraction (LFOC) or particulate organic carbon (POC), is sensitive to management practices and could contribute highly to rise in atmospheric CO_2 when inappropriate managements are employed. In South China, large-scale native forests have been converted to fast-growth and high yield commerc...教育部高校优秀青年教师教学科研奖励计划资助项目 ;; 福建省基础研究重大资助项目 (2 0 0 0 -F-0 0 4)~

从问卷设计看台湾有关两岸关系的民意调查——以近年来两岸关系重大事件或议题上的民调为例

一、前言民意调查是一种了解民意的研究方法。在台湾地区,各式各样的民意调查不仅占据了媒体的版面与时间,也经常成为政治精英与一般民众谈论的焦点。在民意调查的重要性逐渐凸显的情况下,从事民意调查的研究者与研究机构也日益增多,不论是官方部门、朝野各政党、媒体以及其他一些民间单位,都纷纷设立了民意调查机构。按照一般的说法,如果一项民调的执行过程符合科学、客观、中立的标准,那么就能探测到真实准确的民意。然而在台湾的政治现实下,由于各个研究者所受的民意调查训练并

半焦与垃圾衍生燃料混烧的排放特性

在非均匀布风流化床中进行了半焦与垃圾衍生燃料（RDF）的混合燃烧实验，研究了不同半焦混烧率对烟气组分的影响以及二者混烧的可行性与经济性．实验结果表明，随着半焦混烧率的增加，H2O（气态）、CO、HCl、NO及C3H6含量均呈下降趋势，而CO2、SO2含量则呈增加趋势．同时发现，在燃烧过程中增加C1元素含量，可以促进NO的生成

煤部分气化后制得半焦的残余挥发分含量的预测

通过煤的部分气化制备了煤在不同加热终温下的半焦,详细分析了原煤和不同半焦的干燥无灰基挥发分含量,提出预测煤部分气化后生成半焦残余挥发分含量的新方法,即采用两个燃料特性参数FV和FC来分别表征挥发分二次析出特征温度和完全析出时的特征温度,这样根据原煤的工业分析和元素分析数据,就可以简单可靠地预测不同加热终温下所制得半焦中的残余挥发分含量

煤及煤焦燃烧特性的研究现状与展望

对煤及煤焦燃烧基础研究的最新进展进行了综述,重点介绍了煤及煤焦燃烧特性研究的常用方法、判别指标及燃烧动力学模型,并提出了部分气化-燃烧集成优化的煤分级利用的研究新方向

半焦燃烧特性的热重试验研究

针对目前提倡的煤部分气化燃烧系统集成优化联合生产煤气和热能的新概念,在不同温度下制得四种煤的半焦,通过热天平燃烧试验研究了半焦的燃烧特性,考察了煤种和制备温度对半焦燃烧特性的影响.试验结果表明:煤种不同,所制得半焦燃烧特性不同;相同煤种制得半焦,随制备温度升高,半焦着火温度上升,燃烧活化能增加,燃烧反应活性降低

Emission Character of Co-Combustion of Semicokes with RDF

在非均匀布风流化床中进行了半焦与垃圾衍生燃料(RDF)的混合燃烧实验,研究了不同半焦混烧率对烟气组分的影响以及二者混烧的可行性与经济性.实验结果表明,随着半焦混烧率的增加,H2O(气态)、CO、HCl、NO及C3H6含量均呈下降趋势,而CO2、SO2含量则呈增加趋势.同时发现,在燃烧过程中增加Cl元素含量,可以促进NO的生成