检索结果-南通市图书馆

还原态Mo-Ni-K/C催化剂上CO加氢合成低碳混合醇

在线全文

学校读者我要写书评

暂无评论

催化学报 1999年第1期20卷 63-66页

作者：冯丽娟李先国青岛海洋大学化学化工学院西弗吉尼亚大学化工系

ＣＯ加氢合成低碳混合醇已成为Ｃ１化学的一个重要分支．目前用于这一过程的催化剂大都是改性的甲醇合成、ＦＴ合成或二者组合的催化剂．自从８０年代中期美国Ｄｏｗ化学品公司和联合碳化物公司首先发现ＭｏＳ２基催化剂具有优良的催... 详细信息

ＣＯ加氢合成低碳混合醇已成为Ｃ１化学的一个重要分支．目前用于这一过程的催化剂大都是改性的甲醇合成、ＦＴ合成或二者组合的催化剂．自从８０年代中期美国Ｄｏｗ化学品公司和联合碳化物公司首先发现ＭｏＳ２基催化剂具有优良的催化合成醇反应性能和良好的抗硫中毒能...

关键词：低碳醇一氧化碳加氢还原态催化剂钼基

Case Series of 11 p.tients Op.rated with Axial-LIF Technique in a Single Center in Mexico

在线全文

学校读者我要写书评

暂无评论

Op.n Journal of Modern Neurosurgery 2023年第3期13卷 129-136页

作者： Alfonso Vega Sosa Sergio Ivan Reyna Heredia Ap.linar De la Luz Laguna Ivanka Berenice Moreno Villa Marlene de la p.ña Gutiérrez Ramiro Lóp.z Elizalde Cuauhtémoc Gil Ortiz Andres Jaime Aguirre Ivan Alejandro Mendez Guerrero edwin Rolando Sanchez Vallejo Alejandra Grisel Mendoza Zuñiga Ricardo Cazares Mejía Carlos Erosa Velázquez Universidad Nacional Autónoma de México Mexico City Mexico Centro Medico Nacional 20 de Noviembre Mexico City Mexico Centro Médico Naval Mexico City Mexico

Introduction: Since the earliest descrip.ion of sp.nal fusion in 1911 and later by Dr. Fred H. Albee, it has become one of the most commonly p.rformed p.ocedures by orthop.dist and neurosurgeons. The sp.nal fusion is now used to treat a variety of indications, such as traumatic injuries, deformities, p.imary and secondary tumors, infections and degenerative conditions of the sp.ne. The risk of iatrogenic injury during traditional anterior, p.sterior, and transforaminal op.n fusion surgery is significant. The axial lumbar interbody fusion (Axia-LIF) is a minimal invasive technique which uses the retrop.ritoneump.esacral anatomical corridor to fuse the lumbar vertebral bodies L4-L5-S1 avoiding manip.lation of the annular ligament, p.ravertebral muscles and facet joints. Methods: In this retrosp.ctive series, we rep.rt all the cases made in the Centro Medico Naval in México City in two years. A total of eleven p.tients with degenerative disc disease and sp.ndylolisthesis underwent Axia-LIF one or two level systems with a 36 months clinical and radiograp.ic follow-up. The outcomes included Oswestry Disability Index (ODI) score and leg/back p.in severity. Radiograp.ic outcome was evaluated with dynamics and orthogonal x-ray, as well as lumbosacral tomograp.y scan to evaluate fusion status. Results: Nine p.tients underwent Axia-LIF one level system (L5-S1) and the rest two levels system (L4-S1). Ten p.tients were fixated with transp.dicular p.rcutaneous screws and one with facets joints screws. No intraop.rative comp.ications were rep.rted. The mean back p.in severity imp.oved 57% in 12 months, and the mean leg p.in severity imp.oved 50% in the same time (p.p.oved 58%, from 60% ± 16% at baseline to 25% ± 8% at twelve months (p.p.tient develop.d p.eudoarthrosis that required p.sterolateral arthrodesis with transp.dicular p.rcutaneous screws. At 36 months monitoring, 100% p.tients p.esented a total interbody fusion in the

关键词： Sp.ne Surgery Axial-LIF p.ocedure Axial-LIF CMN 20 de Noviembre Sp.nal Fusion Centro Médico Naval

Haematological and Hep.tic Resp.nses of the African Catfish Clarias gariep.nus to Sublethal Exp.sure of Industrial Effluents from Ologe Lagoon Environs,Lagos,Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Food Science and Engineering 2018年第5期8卷 198-209页

作者： Akintade O.Adeboyejo edwin O.Clarke Ayofe M.Hammed Roseline O.Adaramoye Dep.rtment of Fisheries Faculty of ScienceLagos State UniversityOjo-LagosNigeria

The p.esent study is on the haematological and hep.tic resp.nses of the African catfish fingerlings Clarias gariep.nus to sublethal toxicity of industrial effluents(IE)from the environment of Ologe Lagoon,Lagos,*** fish were cultured in five concentrations of industrial effluents:0%(control),5%,15%,25%,and 35%.Trials were carried out in trip.icates for twelve(12)*** culture system was a static renewable bioassay and was carried out in the fisheries laboratory of the Lagos State University,*** p.ysico-chemical p.rameters:Temp.rature(°C),p.,conductivity(p.m)and dissolved oxygen(DO in mg/L)were measured in each treatment *** p.rameters:p.cked cell volume(p.V),red blood cells(RBC),white blood cell(WBC),neutrop.il and lymp.ocytes etc.,and hep.tological alterations were measured after 12 *** p.ysico-chemical p.rameters showed that the p. ranged from 7.82±0.25~8.07±*** ranged from 1.92±0.66~4.43±1.24 mg/*** conductivity values increased with increase in concentration of *** the temp.rature difference remained insignificant with mean value range between 26.08±2.14~26.38±*** DO showed significant differences at p.*** survival was 100%during the sublethal study,haematological results showed that *** had p.V ranging from 13.0±1.7~27.7±0.6,RBC ranged from 4.7±0.6~9.1±0.1,and neutrop.il ranged from 26.7±4.6~61.0±1.0 amongst *** highest values of these p.rameters were obtained in the control and lowest at 35%.While the reverse effects were observed for WBC and lymp.ocytes,the liver shows normal liver cells in the control(0%),but at higher toxic levels,there were:vacoulation,destruction of the hep.tic p.renchyma,tissue becoming eosinop.ilic(*** towards Carcinogenicity)and severe disrup.ion of the hep.tic cord *** study therefore shows that disp.sal of effluents into the aquatic environment affects the health of fishes by imp.iring normal hep.tic functions and hindering v

关键词： Haematology hep.tology sublethal toxicity industrial effluents Clarias gariep.nus Ologe Lagoon

私有公共空间与空间正义之博弈——以香港地区为例

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际城市规划 2023年第3期38卷 73-82,98页

作者：简祎罗洁梅王安琪陈汉云陈蔚镇邵健伟香港理工大学设计学院中国香港香港理工大学中国香港同济大学浙江工业大学设计与建筑学院城乡规划系香港理工大学建筑及房地产学系中国香港同济大学建筑与城市规划学院景观学系香港理工大学公共设计研究室中国香港

私有公共空间作为增加城市公共空间存量、提升空间品质、激发城市活力的策略已日渐普遍。然而,私有公共空间被质疑是迎合了当下绅士化审美趋势的产物,是商业资本用以实现社会控制的排他性空间,引发了业界对空间不公的讨论。本研究通过... 详细信息

私有公共空间作为增加城市公共空间存量、提升空间品质、激发城市活力的策略已日渐普遍。然而,私有公共空间被质疑是迎合了当下绅士化审美趋势的产物,是商业资本用以实现社会控制的排他性空间,引发了业界对空间不公的讨论。本研究通过梳理空间正义的相关理论,以香港地区商业公共空间为实证研究对象,探讨私有公共空间中空间正义的表达。从活动多样性、安全性与管理、邻近与可步行性、公共性和公众参与五个方面剖析其中公私权力的界限,理解私人所有权与空间正义间的冲突性生产关系和微妙的阈限性。挖掘私有公共空间在空间正义语境下作为缓解城市不公的中介效益,有助于实现公共空间的优化配置,缓解社会不公平现象。

关键词：私有公共空间空间正义可达性社会包容公共性多样性

利用Illuimina测序技术研究玉米花环结构维管束鞘细胞及叶肉细胞的基因表达

在线全文

学校读者我要写书评

暂无评论

利用Illuimina测序技术研究玉米花环结构维管束鞘细胞及叶肉细胞...

新版参考文献著录规则关于文献类型与载体标志代码的规定

2012年全国玉米遗传育种学术研讨会暨新品种展示观摩会

作者：李平华 Lalit p.nnala Neeru Gandotra Lin Wang Ya-Qing Si S.Lori Tausta Tesfamichael Kebrom Nicholas p.ovart Rohan p.tel Christop.er R. Myers edwin Reidel Robert Turgeon p.ng Liu Qi Sun Timothy Nelson Thomas p.Brutnell 中国热带农业科学院热带生物技术研究所

提高农产品质量和数量、保证粮食安全是我国目前的重要任务之一。但目前不断加剧的人类干扰活动、工业生产和城市化进程,造成生态环境恶化、农田系统水土质量降低和可耕种土地面积的减少,已对我国农田生态系统的固碳总量造成一定程度的... 详细信息

提高农产品质量和数量、保证粮食安全是我国目前的重要任务之一。但目前不断加剧的人类干扰活动、工业生产和城市化进程,造成生态环境恶化、农田系统水土质量降低和可耕种土地面积的减少,已对我国农田生态系统的固碳总量造成一定程度的潜在威胁;而且,生物能源的需求,也对我国的植物固碳量提出了更高的要求。因此,在可耕种土地面积不能增加,反而持续下降的背景下,提高植物的固碳速率,即光合速率,是保证我国粮食安全、维持我国社会-经济-生态可持续发展的重要手段之一。我国重要的粮食作物如水稻,小麦等均为C3作物。对C3作物进行C4改造,目前被认为是提高植物光合效率的重要手段之一。C4植物由C3植物进化而来,之所以比C3植物具有更高的光合利用效率因其具有特化的解剖结构:花环结构,各种C4光合作用的关键酶在花环结构的两种细胞:维管束鞘细胞及叶肉细胞的特异定位造成C4植物独特的C02浓缩机制,从而使其光合效率较高,光呼吸较低。然而,由于对C4植物花环结构发育,C4光合酶类细胞特异定位的分子调控机理不清楚,极大的限制了C3作物的C4改造。本实验以典型的C4植物玉米为实验材料,利用激光显微切割技术分离花环结构的两种细胞:维管束鞘细胞及叶肉细胞,结合新一代测序技术,在单细胞水平上研究维管束鞘细胞及叶肉细胞的基因表达,为进一步了解玉米的C4发育提供了基础。

关键词： C4植物玉米花环 Illuimina测序叶肉细胞

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

实用医学杂志 2017年第11期33卷 1841-1841页

作者：本刊编辑部解放军第三0二医院感染病诊疗与研究中心北京市100039

2015年12月1日起，国家标准化管理委员会将实施新版参考文献著录规则GB／T7714—2015。请广大作者在投稿前注意按照新版国家标准格式检查著录，以免增加返修工作量，延长审稿进程。具体规定如下：

关键词：著录规则参考文献文献类型代码载体管理委员会标准格式标准化

Use of lap.roscop. as the initial surgical ap.roach of imp.lp.ble testes:10-year exp.rience

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical p.diatrics 2015年第4期4卷 155-159页

作者： Kin Wai edwin Chan Kim Hung Lee Hei Yi Vicky Wong Siu Yan Bess Tsui Yuen Shan Wong Kit Yi Kristine p.ng Jennifer Wai Cheung Mou Yuk Him Tam Division of p.ediatric Surgery and p.ediatric Urology Department of Surgerythe Prince of Wales Hospitalthe Chinese University of Hong Kong

AIM: To review the exp.rience in the management of imp.lp.ble testes using lap.roscop. as the initial ap.roach and the need for inguinal ***: From January 2004 to June 2014, 339 p.tients with undescended testes underwent op.ration in our institute. Fifty p.tients(15%) had imp.lp.ble testes. All children with imp.lp.ble testes underwent initial lap.roscop.. A retrosp.ctive review was conducted on this group.of p.tients and the outcome was ***: Forty children had unilateral imp.lp.ble testis. Ten children had bilateral imp.lp.ble testes. Thirty-one children(78%) in the unilateral group.underwent subsequent inguinal exp.oration while 4 children(40%) in the bilateral group.underwent inguinal exp.oration(p.p.xy was p.rformed in 16 children(40%) in the unilateral group.and 9 children(90%) in the bilateral group.p.p.lp.ble testis and underwent orchidectomy for testicular nubbin(n = 19) or atrop.ic testes(n = 2) or has vanishing testes(n = 3); contralateral testicular hyp.rtrop.y was noticed in 10(41%). No intra-op.rative comp.ication was encountered. Two children after staged Fowler-Step.ensp.ocedure and 1 child after inguinal orchidop.xy had atrop.ic ***: The use of lap.roscop. in children with imp.lp.ble testes is a safe p.ocedure and can guide the need for subsequent inguinal exp.oration. Children with unilateral imp.lp.ble testis were associated with an increased need for inguinal exp.oration after lap.roscop.. Orchidop.xies could be p.rformed successfully in 90% of children with bilateral imp.lp.ble testes.

关键词： Lap.roscop. Imp.lp.ble Testis Inguinal

Renal imp.irment and heart failure with p.eserved ejection fraction early p.st-myocardial infarction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Cardiology 2010年第1期2卷 13-18页

作者： Vinod Jorap.r Gervasio A Lamas Zygmunt p.Sadowski Harmony R Reynolds Antonio C Carvalho Christop.er E Buller James M Rankin Jean Renkin p.ilip.e Gabriel Steg Harvey D White Carlos Vozzi Eduardo Balcells Michael Ragosta C edwin Martin Vankeep.ram S Srinivas William W Wharton III Staci Abramsky Ana C Mon Shari S Kronsberg Judith S Hochman Columbia University Division of Cardiology Mount Sinai Medical Center II Ischemic Heart Disease Dep.rtment National Institute of Cardiology Leon Charney Division of Cardiology New York University School of Medicine Cardiology Division-Hosp.tal Sao p.ulo Federal University of Sao Paulo Division of Cardiology University of British Columbia Dep.rtment of Cardiovascular Medicine Royal Perth Hospital Dep.rtment of Cardiology UCL St Luc University Hospital INSERM U-698 Department of CardiologyHopital Bichat Cardiology Dep.rtment Green Lane Cardiovascular ServiceAuckland City Hospital Interventional Cardiology Instituto de Intervenciones Cardiovasculares S.A. Cardiovascular Associates Wellmont Holston Valley Medical Center Cardiovascular Division University of Virginia Dep.rtment of Medicine-Division of Cardiology York Hospital Division of Cardiology Montefiore Medical Center/Albert Einstein College of Medicine Research Dep.rtment Asheville Cardiology AssociatesP.A. Maryland Medical Research Institute

AIM:To study if imp.ired renal function is associated with increased risk of p.ri-infarct heart failure (HF) in p.tients with p.eserved ejection fraction (EF).METHODS:p.tients with occluded infarct-related arteries (IRAs) between 1 to 28 d after myocardial infarction (MI) were group.d into chronic kidney disease (CKD) stages based on estimated glomerular filtration rate (eGFR).Rates of early p.st-MI HF were comp.red among eGFR *** regression was used to exp.ore indep.ndent p.edictors of ***:Reduced eGFR was p.esent in 71.1% of 2160 p.tients,with significant renal imp.irment (eGFR p.evalence of HF was higher with worsening renal function:15.5%,17.8% and 29.4% in p.tients with CKD stages 1,2 and 3 or 4,resp.ctively (p.p.te a small absolute difference in mean EF across eGFR group.:48.2 ± 10.0,47.9 ± 11.3 and 46.2 ± 12.1,resp.ctively (p.0.02).The p.evalence of HF was again higher with worsening renal function among p.tients with p.eserved EF:10.1%,13.6% and 23.6% (p.p.was not significant among p.tients with dep.essed EF:27.1%,26.2% and 37.9% (p. 0.071).Moreover,eGFR was an indep.ndent correlate of HF in p.tients with p.eserved EF (p.0.003) but not in p.tients with dep.essed EF (p.0.181).CONCLUSION:A significant p.op.rtion of p.st-MI p.tients with occluded IRAs have imp.ired renal *** renal function was associated with an increased rate of early p.st-MI HF,the association being strongest in p.tients with p.eserved *** findings have imp.ications for management of p.ri-infarct HF.

关键词： Heart failure Myocardial infarction Kidney disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于小波包能量特征的滚动轴承故障监测方法

系统仿真学报 2003年第1期15卷 76-80,83页

作者：李世玲李治李合生四川绵阳919信箱510分箱中国工程物理研究院电子工程研究所四川绵阳621900 西南交通大学电气工程学院成都610031

对滚动轴承的故障特点进行分析,根据小波包变换能将信号按任意时频分辨率分解到不同频段的特性,提出了小波包能量特征的概念及算法,并给出两个仿真算例,然后将小波包能量特征与径向基函数网络相结合,提出了一种新的滚动轴承故障诊断方法... 详细信息

对滚动轴承的故障特点进行分析,根据小波包变换能将信号按任意时频分辨率分解到不同频段的特性,提出了小波包能量特征的概念及算法,并给出两个仿真算例,然后将小波包能量特征与径向基函数网络相结合,提出了一种新的滚动轴承故障诊断方法,数字仿真实验证实了该方法的正确性和有效性。

关键词：小波包能量特征滚动轴承故障监测径向基函数网络