Study on the Preparation of ZSM-5 Catalysts and the Performance for the Aromatization of Butane

芳烃是一种重要的石油化工原料。目前，芳烃主要来源于石化厂的以石脑油为原料的蒸汽裂解和重整过程。而低碳烷烃芳构化则越来越成为芳烃来源的重要途径之一。正丁烷是炼化行业和海陆油气田的重要副产品，因此，开展正丁烷芳构化催化反应的技术研究有利于充分利用副产物资源，从而具有重要意义。 本文主要进行了ZSM-5分子筛的制备、表征及其丁烷芳构化催化性能研究。首先，在本课题组前期工作的基础上，以四丙基氢氧化铵为模板剂，考察晶化温度及晶化时间对所制ZSM-5分子筛性质及催化性能的影响。实验研究结果表明，采用两步变温法（120℃下恒温12h，180℃下恒温8h）制备的ZSM-5分子筛晶粒粒径小且比较均匀，酸性适宜...Aromatic hydrocarbon is a kind of important petroleum chemical raw materials, which mainly comes from petrochemical plant using naphtha as the raw material by steam cracking and restructuring process. Recently light alkane aromatization is increasingly becoming one of the important ways of aromatic hydrocarbon source. N-butane is an important by-product of refining industry and marine oil and gas ...学位：理学硕士院系专业：化学化工学院_物理化学学号：2052013115161

The study on determination of trace elements and transference characteristics in the botanic chinese medicinal herb of reducing blood sugar and health food

目的 :对植物性降血糖中药及保健食品中微量元素的含量及溶出特性进行研究 ;方法 :电感耦合等离子体质谱法 (ICP -MS) ;结果 :不同的降血糖中药和保健食品的消解液及冲泡液中锰、铁、锌、钙的含量都很高 ,铜、镍、硒次之 ;其中BCBT茶中镍的溶出率最高达 6 0 2 % ,铜、锌次之 ,分别为 38 7%、35 1%。objective: studying the determination of trace elements and transference characteristics in the botanic chinese medicinal herb of reducing blood sugar and health food; methods: Inductively Coupled Plasma Mass Spectrometry(ICP-MS); results: in different chinese medicinal herbs of reducing blood sugar and health food ,the contents of Mn?Fe?Zn?Ca are very high, followed by Cu?Ni?Se and the extractive content of Ni in BCBT tea is the highest :60 2% ,Cu Zn is second: 38 7%?35 1%.福建省青年科技人才创新项目 ( 2 0 0 1J0 63

Phytoplankton biomarkers in surface seawater from the northern South China Sea in summer 2009 and their potential as indicators of biomass/community structure

生物标志物已被广泛应用于重建浮游植物生产力和群落结构变化。该方法假设之一是生标的含量可以反映表层海水的浮游植物生物量,但这个假设还缺乏现场观测的充分验证。对2009年冬季南海北部表层海水颗粒物中主要生标做了分析,利用其含量及比值研究浮游植物的生物量及群落结构的分布。生标含量表明硅藻、甲藻、颗石藻的高值区位于珠江口南部及广东沿岸,在陆坡区也有高值。生标比值显示硅藻在3个类群中的相对比例最高。其中,甲藻/硅藻比值高值区位于陆坡区,这与大洋水(黑潮)的入侵,带来大量暖水性甲藻有很大关系;颗石藻/硅藻比值总体趋势与生物量的分布相反,在近岸少数站位有高值,向外海逐渐增加,主要是因为颗石藻更适于寡营养盐的环境。生标结果所指示的生物量及群落结构的空间分布与前人的调查结果类似,为利用生标重建此区域的浮游植物生产力和群落结构变化提供了依据。Biomarkers have been widely used to reconstruct phytoplankton productivity based on the assumption that biomarker contents could reflect phytoplankton productivity in the surface seawater.However,this hypothesis has not been validated with modern survey.In this study,the contents and ratios of three phytoplankton biomarkers in the surface seawater of the northern South China Sea in winter 2009 were analyzed,to indicate spatial distributions of phytoplankton biomass and community structure.The results show high values for diatoms,dinoflagellates and coccolithophorids near the Pearl River Estuary and Guangdong coastal areas.The community structure indicates diatoms are the dominant phytoplankton species in winter.High values of dinoflagellate/diatom ratio occur near the slope area owing to intrusion of the Kuroshio,which favors the growth of dinoflagellates.The coccolithophorid/diatom ratio displays an increasing trend from the Pearl River Estuary to offshore region due to the advantage of coccolithophorids in oligotrophic environment,which is opposite to the productivity pattern of all biomarkers.These results are consistent with previous studies using phytoplankton cell and pigments,which provides support for the use of biomarker to reconstruct phytoplankton productivity and community structure in the SCS.国家重点基础研究发展计划项目(2007CB815934、2009CB421201);国家自然科学基金项目(40776029

Development of Electrochemical Biosensor for Detection of PML/RARα Fusion Gene in Acute Promyelocytic Leukemia

针对急性早幼粒细胞白血病(APl)中PMl/rArα融合基因的碱基序列,设计了锁核酸(lnA)修饰的发夹结构捕获探针,结合信号探针构建新型的“三明治“电化学传感模式。信号探针末端修饰的生物素可与酶上的亲和素结合,通过检测酶催化H2O2氧化底物3,3',5,5'-四甲基联苯胺(TMb)产生的电化学信号,实现对靶序列的检测。该传感器可识别和定量检测PbS缓冲液中人工合成的PMl/rArα融合基因序列。结果表明,该传感器能很好地区分互补序列、单碱基及多碱基错配序列,杂交电流值与目标链浓度在1.0x10-11~1.6x10-10 MOl/l范围内呈较好的线性关系,检出限为1.0x10-13 MOl/l。同时,该新型传感器成功地用于无稀释人血清中PMl/rArα融合基因的检测,具有特异性强、灵敏度高和重复性好的优点,有望用于临床实际样品的检测,进而实现临床上急性早幼粒细胞白血病的早期诊断及预后判断。A novel DNA electrochemical probe(locked nucleic acid,LNA) was designed and involved in constructing an electrochemical DNA biosensor for the detection of PML/RARα fusion gene in acute promyelocytic leukemia(APL).This biosensor was based on a "sandwich" detection strategy,which involved a pair of LNA probes,e.g.hairpin capture probe and reporter probe.Streptavidin-HRP was bound to biotin labeled at the end of reporter probe via streptavidin-biotin affinity binding.In the presence of hydrogen peroxide(H2O2),HRP catalyzed the oxidation of the substrate 3,3′,5,5′-tetramethylbenzidene(TMB) to offer an enzymatically amplified electrochemical current signal for the detection of target DNA.This sensor was applied in the direct quantitative detection of synthetic PML/RARα fusion gene in PBS buffer.The results indicated that the biosensor showed an excellent specificity to distinguish the complementary sequence and different mismatch sequences.A linear relationship between the amperometric signal and the target concentration was obtained in the range of 1.0×10-11-1.6×10-10 mol/L with a detection limit of 1.0×10-13 mol/L.In addition,the biosensor was used for the determination of PML/RARα fusion gene in human serum samples without dilution with high sensitivity,selectivity and good repeatability.This method would be expected to use in real sample for further solving the actural problems of early diagnosis and prognosis monitoring of APL.863计划资助项目(2008AA02Z433);福建省高校产学研科技重点项目(2010Y4003);国家自然科学基金资助项目(20805006;20975021);福建省自然科学基金资助项目(2010J05019

贝壳吸声界面吸声性能试验研究

以贝壳、玻璃棉为主要材料,利用贝壳、玻璃棉、空腔组成一个吸声界面,通过驻波管吸声降噪的试验研究,探究不同厚度的贝壳层、玻璃棉层、空腔这三者的搭配组成的吸声界面的吸声频谱特性及变化规律,用于不同贝壳层厚度、不同玻璃棉厚度吸声性能的预测评估,为最终实现贝壳吸声产品研发提供参考

面向城市可持续发展的自然解决途径(NBSs)研究进展

自然解决途径(NBSs)是近几年生态学应用研究的热点,其理念是综合考虑经济、环境和社会效益,引入自然生态系统服务功能用来修复、恢复甚至提升城市生态基础设施水平,进而解决城市面临的可持续发展挑战。自然解决途径的提出为生态设计注入了新鲜的血液,提供了新的视野和技术方法。基于VOSviewer文献计量分析软件对城市自然解决途径研究的热点关键词、主要研究国家、机构以及全球分布进行了综合分析。结果发现:(1)2015年至2018年有关城市NBSs的研究论文逐渐增多,覆盖6大洲(欧洲、北美洲、亚洲、南美洲、大洋洲、非洲),多数案例是对已有实施工程中采用的可以归纳为自然解决途径的某些方法或者经验的总结凝练;(2)与城市NBSs相关研究热点从高到低主要涉及生态系统服务、绿色基础设施、气候变化、人群健康与福祉;(3)城市自然解决途径研究的主要力量主要聚集在欧洲,目前中国对于NBSs研究仍处于初期起步阶段。将有助于促进自然解决途径研究及实践在中国的发展,同时为城市生态设计和可持续发展提供新视野和新技术。国家自然科学基金项目(41771573)国家重点研发计划(2016YFC0502702

Ｒelationship between psychological flexibility and parental psychological flexibility in preschool children＇ s mother

目的:探讨学龄前儿童母亲的心理灵活性与养育心理灵活性的关系。方法:通过微信客户端招募北京市学龄前儿童(2~6岁)的母亲191名,采用接纳与行动问卷第二版(AAQ-II)测量心理灵活性、养育心理灵活性问卷(PPFQ)测量养育心理灵活性。结果:不同人口学特征学龄前儿童母亲的AAQ-Ⅱ和PPFQ得分差异均无统计学意义(均P&gt;0.05)。线性回归分析发现,母亲的心理灵活性对养育心理灵活性具有正向预测作用(&beta;=0.58,P&lt;0.001)。结论:本研究提示,学龄前儿童母亲的心理灵活性越高,其养育心理灵活性越高。</p

帕金森病合并体位性低血压患者危险因素的研究

目的：对青海地区帕金森病患者进行横断面调查，通过卧立位血压测量和一般资料收集，分析帕金森病合并体位性低血压的影响因素。方法：选取自 2017 年 2 月至 2017 年9 月在青海某三甲医院就诊的帕金森病患者 150 例，进行两次卧立位血压测量后进行基线资料调查，应用 Logistic 逐步回归分析帕金森病合并体位性低血压的影响因素。结果：经过卧立位血压测量，检测出 OH 患者 47 例，患病率为 31.5%。单因素分析结果显示个人因素、年龄、身高、腹围、合并症、症状、文化程度具有显著性差异（P＜0.05）。结论：年龄偏大、腹围偏小、身高偏高、有体位不耐受症状以及合并有高血压的帕金森病患者更容易患有体位性低血压。</jats:p