检索结果-南通市图书馆

Catalytic oxidation of pentanethiol on basic nitrogen doped carbon hollow spheres derived from waste tires

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2022年第4期19卷 1888-1896页

作者： Jing Luo Wen-Feng Zhang Yan-Chen Wei Ji-Xing liu Chao Wang Yi-Ru Zou Hai-Tao Ju li-ping mu Yan-Hong Chao Hong-Bing Ji Wen-Shuai Zhu School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang212013JiangsuChina School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013JiangsuChina School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang212013JiangsuChina College of Chemical Engineering and Environment State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum-BeijingChangping102249BeijingChina School of Chemistry Sun Yat-Sen UniversityGuangzhou510275GuangdongChina

A series of basic nitrogen doped carbon hollow spheres(p-N-C) catalysts derived from waste tires were prepared by a green, facile and environmental “leavening” strategy for the catalytic oxidation of pentanethiol. Compared to pristine carbon, the p-N-C has a higher surface curvature conducive to the enrichment of substrates, leading to an excellent catalytic performance. This increased surface curvature of p-N-C was fabricated on the synergistic effect of two foaming agents((NH4)2 C2 O4 and NaHCO3), and the released gas also endows the spherical shell of p-N-C with a hierarchical porous structure, promoting the accessibility of active sites with pentanethiol. Pyridine-like and pyrrolic-like nitrogen atoms were investigated as reactive sites on the p-N-C to accelerate the electron transfer from sulfur to active surface oxygen and enhance the adsorption/oxidation process. As a result, the optimal p-N-C catalyst exhibits superior adsorption and oxidation performance(99.9%) of pentanethiol, outperforming the “unleavened”catalyst(20.8%). This work offers a new avenue for the fabrication of highly efficient materials for the desulfurization of fuel.

关键词： Carbon hollow spheres Nitrogen-doping Waste tires Leavening strategy Pentanethiol

A simple and versatile protocol for isolation of RNA from plant, fungi and animal

在线全文

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology 2008年第1期2卷 63-65页

作者： QUE You-xiong li Wei XU Jing-sheng XU li-ping ZHANG mu-qing Key Lab of Sugarcane Eco-Physiology ＆ Genetic Improvement Ministo of Agriculture Fuzhou 350002 China

Compared to other plants, the traditional protocols for RNA isolation from sugarcane （Saccharum） are usually cJeficient and result in poor yields, or low-quality. Here we describe a modified method for isolating RNA from various fissoes of S. officinarum, in which only Trizol and some routine reagents were needed. The absorbance at 260/280 nm ranges from 1.70 to 1.80, indicating that the quality of RNA is high, as confirmed by double-stranded cDNA synthesis and reverse ~ranscription-polymerase chain （RT-PCR）. This protocol can also be used effectively in RNA isolation from Erianthus arundinaceus, rice （Oryza sativa linnaeus）, Achyranthes, sporotrichum spp., Thermophil and loach （Misgurnus an g uillicaudatus ）.

关键词： Saccharum officinarum RNA polysaccharides polyphenols

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

埋地刚性管道上的地面荷载计算

混凝土与水泥制品 2010年第3期 26-31页

作者：阙小平李平木四川国统混凝土制品有限公司成都610509

针对埋地刚性管道上作用的地面荷载,明确附加荷载与堆积荷载的区别,并对几种计算方法进行分析和算例计算,提出了地面荷载计算时应明确的参数,得出了不同荷载条件下适用的计算方法。

关键词：埋地刚性管道附加荷载堆积荷载应力扩散角法附加应力法

在线全文

学校读者我要写书评

暂无评论

早发性卵巢功能不全对神经功能影响

中国实用妇科与产科杂志 2018年第3期34卷 251-255页

作者：王艳王丽平任慕兰东南大学附属中大医院妇产科江苏南京210009

多数观察性研究表明,低雌激素状态对精神神经功能和认知功能有影响,在早发性卵巢功能不全(POI)患者表现更为明显,但直接的研究证据或高级别循证医学研究的评估资料有限。对POI患者尽早开始激素补充治疗有利于预防或减缓神经功能的退化... 详细信息

多数观察性研究表明,低雌激素状态对精神神经功能和认知功能有影响,在早发性卵巢功能不全(POI)患者表现更为明显,但直接的研究证据或高级别循证医学研究的评估资料有限。对POI患者尽早开始激素补充治疗有利于预防或减缓神经功能的退化或下降,但并不能完全纠正过早的卵巢功能衰退和绝经对神经功能的负面影响。重视POI发生和进展的各项影响因素,尽可能减缓病程进展,是防范POI患者神经功能损伤的首要措施。

关键词：早发性卵巢功能不全神经功能激素补充治疗

滨海滩涂地带乌哺鸡竹和淡竹离子含量变化及其与生长及光合作用的关系

在线全文

学校读者我要写书评

暂无评论

应用生态学报 2016年第10期27卷 3145-3152页

作者：李娟高健孙中元李雪平牟少华国际竹藤中心北京100102 北京林业勘察设计院北京100029

在沿海滩涂防护林带低盐区(0.1%)、中盐区(0.2%)和重盐区(0.4%)3个盐分梯度下,研究了栽植10年的乌哺鸡竹和淡竹Na^+、K^+、Ca^(2+)、Mg^(2+)含量变化及其与生长和光合作用的相关关系.结果表明:从低盐区到重盐区,乌哺鸡竹的立竹密度和地... 详细信息

在沿海滩涂防护林带低盐区(0.1%)、中盐区(0.2%)和重盐区(0.4%)3个盐分梯度下,研究了栽植10年的乌哺鸡竹和淡竹Na^+、K^+、Ca^(2+)、Mg^(2+)含量变化及其与生长和光合作用的相关关系.结果表明:从低盐区到重盐区,乌哺鸡竹的立竹密度和地径分别下降30.4%和28.8%,降幅低于淡竹的44.1%和31.2%;两竹种单株生物量下降,地上器官生物量降幅均显著高于地下器官;乌哺鸡竹和淡竹净光合速率(P_n)和PSⅡ最大光化学效率(F_v/F_m)分别下降57.6%和67.7%、6.1%和7.4%,乌哺鸡竹耐盐能力比淡竹强.随着土壤含盐量的增大,乌哺鸡竹和淡竹各器官Na^+含量逐渐增加,K^+、Ca^(2+)、Mg^(2+)含量逐渐降低.两竹种根Na^+积累较多,而地上部分K^+含量较高.盐胁迫环境导致乌哺鸡竹根Ca^(2+)含量与淡竹叶片Mg^(2+)含量明显下降.两竹种的生物量、P_n、F_v/F_m与Na^+含量呈显著负相关,与K^+、Ca^(2+)含量呈显著正相关.

关键词：乌哺鸡竹淡竹盐阳离子光合作用

大气压介质阻挡辉光放电脉冲的阴极位降区特性及其影响因素的数值仿真

在线全文

学校读者我要写书评

暂无评论

物理学报 2017年第2期66卷 257-268页

作者：姚聪伟马恒驰常正实李平穆海宝张冠军西安交通大学电气工程学院电力设备电气绝缘国家重点实验室西安710049

大气压介质阻挡放电常用于产生低温等离子体,其放电特性已成为当前的研究热点.本文针对大气压氦气介质阻挡放电结构建立了流体数值仿真模型,研究其辉光放电脉冲特性.从发光结构、粒子分布和电场分布等方面说明了该类型放电辉光结构的时... 详细信息

大气压介质阻挡放电常用于产生低温等离子体,其放电特性已成为当前的研究热点.本文针对大气压氦气介质阻挡放电结构建立了流体数值仿真模型,研究其辉光放电脉冲特性.从发光结构、粒子分布和电场分布等方面说明了该类型放电辉光结构的时空演化过程;分别从电子增长率和电场强度分布两个角度比较和分析了该类型放电中阴极位降区范围的定义,并探讨了发光最强点位置与阴极位降区边界的关系,认为利用电场强度分布来定义该类型放电的阴极位降区范围更加合理,且在电流下降沿内,光强最强点始终处于阴极位降区内部.研究了外施电压、阻挡介质二次电子发射系数γ和N_2含量对间隙电压、电流密度和阴极位降区特性等的影响规律.发现:在二次电子发射系数γ不变时,阴极位降区宽度与电流密度具有负线性相关关系;利用阴极位降区的伏安特性证明了该类型放电属于亚辉光放电靠近正常辉光放电的部分;主要考虑N_2与He的Penning效应时,电流密度和带电粒子密度在一定N_2含量下具有最大值等.

关键词：大气压介质阻挡放电阴极位降区辉光放电流体模型

在线全文

学校读者我要写书评

暂无评论

煤巷高强稳定型锚杆支护技术

陕西煤炭 2007年第6期26卷 58-59页

作者：李慕平高睿陕西煤业化工集团公司陕西西安710054

介绍了铜川矿务局徐家沟煤矿地质情况,利用锚杆支护改变围岩力学状态,达到支护巷道的目的。

关键词：地质条件高强稳定锚杆支护

矿井音频电透视技术探查顶板砂岩水——以济三煤矿为例

在线全文

学校读者我要写书评

暂无评论

煤田地质与勘探 2007年第6期35卷 74-76,80页

作者：曾方禄李慕平高建华煤炭科学研究总院西安研究院陕西西安710054 铜川矿务局徐家沟煤矿陕西铜川727000 陕西煤业化工集团公司陕西西安710054

超前探查并正确处理煤层上覆含水层异常,是确保矿井安全生产的重要工作之一。应用矿井音频电透视技术,对济三煤矿二叠系山西组3煤层顶板砂岩及侏罗系蒙阴组底部砾岩充水含水层进行了探测。探采对比分析表明:在地层垂向结构相同,横向相... 详细信息

超前探查并正确处理煤层上覆含水层异常,是确保矿井安全生产的重要工作之一。应用矿井音频电透视技术,对济三煤矿二叠系山西组3煤层顶板砂岩及侏罗系蒙阴组底部砾岩充水含水层进行了探测。探采对比分析表明:在地层垂向结构相同,横向相对均一的情况下,视电导率值越高、异常幅度越大,地层的含水性越强;工作面回采涌水区段相对于物探异常位置滞后明显;涌水量的大小与音频电透视的视电导率值、异常幅度正相关。

关键词：水文异常地质体音频电透视参数涌水量

CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2420-2432页

作者： lin Yin Yalan Xu Jie mu Yu Leng Lei Ma Yu Zheng Ruizhi li Yin Wang Peifeng li Hai Zhu Dong Wang Jing li Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina School of Basic Medicine Qingdao UniversityQingdaoShandong ProvinceChina College of life Sciences and School of PharmacyMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina Department of Urology Qingdao Municipal Hospital Affiliated to Qingdao UniversityQingdaoShandong ProvinceChina

The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding *** of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully *** has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic ***,the function of CNKSR2 in the cytoplasm remains to be *** this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of *** a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the *** also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker *** colocalization analysis confirmed the centrosomal localization of *** we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal *** manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and ***,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum *** findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders.

关键词： autism spectrum disorder centrosome CNKSR2 intellectual disability interactome mass spectrometry microtubule neurodevelopmental disease protein complexes protein-protein interactions