检索结果-南通市图书馆

Sleep Disordered Breathing Asian ***

中国化学会第五届全国结构化学学术会议

＜正＞A novel type 1 ribosome-inactivating protein designated luffaculin 1 was isolated from the seeds of Luffa *** rRNA N-glycosidase activity,luffaculin 1 also demonstrates activities including inhibiting tumor cell...

关键词：

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

Visualization of atomic scale reaction dynamics of supported nanocatalysts during oxidation and ammonia synthesis using in-situ environmental(scanning) transmission electron microscopy

华东地区睡眠医学新进展高级研修班

作者： edward j.Morgan Hawaii School of Sleep Medicine and Technology September 2002

＜正＞Evidence-Based Medicine Residents are not correct unless there is evidence Attendings are not correct unless there is evidence Professors are not correct unless there iS evidence

关键词：

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

journal of Energy Chemistry 2021年第6期30卷 281-290,I0007页

作者： Michael R.Ward Robert W.Mitchell edward D.Boyes Pratibha L.Gai The York Nanocentre University of YorkYork YO105DDUK Department of Physics University of YorkYork YO105DDUK Department of Electronic Engineering University of YorkYork YO105DDUK Department of Chemistry University of YorkYork YO105DDUK

Reaction dynamics in gases at operating temperatures at the atomic level are the basis of heterogeneous gas-solid catalyst reactions and are crucial to the catalyst *** noble metal nanocatalysts such as platinum are of interest in fuel cells and as diesel oxidation catalysts for pollution control,and practical ruthenium nanocatalysts are explored for ammonia *** and graphitic carbons are of interest as supports for the *** considerable literature on the catalytic processes on graphite and graphitic supports,reaction dynamics of the nanocatalysts on the supports in different reactive gas environments and operating temperatures at the single atom level are not well *** we present real time in-situ observations and analyses of reaction dynamics of Pt in oxidation,and practical Ru nanocatalysts in ammonia synthesis,on graphite and related supports under controlled reaction environments using a novel in-situ environmental(scanning) transmission electron microscope with single atom *** recording snapshots of the reaction dynamics,the behaviour of the catalysts is *** images reveal single metal atoms,clusters of a few atoms on the graphitic supports and the support *** all play key roles in the mobility,sintering and growth of the *** experimental findings provide new structural insights into atomic scale reaction dynamics,morphology and stability of the nanocatalysts.

关键词： In-situ visualization Atomic scale reaction dynamics In-situ environmental scanning transmission electron microscopy with single atom resolution Supported nanoparticles Ammonia synthesis Oxidation reactions

An Adaptive Grouping Scheme in Ultra-Dense IEEE 802.11ax Network Using Buffer State Report Based Two-Stage Mechanism

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

China Communications 2019年第9期16卷 31-44页

作者： jiyang Bai He Fang junghoon Suh Osama Aboul-Magd edward Au Xianbin Wang Department of Electrical and Computer Engineering Western UniversityLondonON N6A 5B9Canada Huawei Technologies Canada Co. LTD.OttawaON K2K 3J1Canada

IEEE 802.11ax,which is an emerging WLAN standard,aims at providing highly efficient communication in ultra-dense wireless ***,due to a large number of stations(STAs)in the ultra-dense device deployment scenarios,the potentially high packet collision rate significantly decreases the communication efficiency of *** this paper,we propose an adaptive STA grouping scheme to overcome this dense network challenge in IEEE 802.11ax by using Buffer State Report(BSR)based Two-stage Mechanism(BTM).In order to achieve the optimal efficiency of BSR delivery,we analyze the functional relationship between STA number in group and Resource Unit(RU)*** on this analysis results,an adaptive STA grouping algorithm with variable group size is proposed to achieve efficient grouping in *** numerical results demonstrate that the proposed adaptive BTM grouping algorithm significantly improves the BSR delivery efficiency and the throughput of overall system and each STA in the ultra-dense wireless network.

关键词： IEEE 802.11ax Orthogonal Frequency-Division Multiple Access (OFDMA),Buffer Status Report (BSR) Uplink OFDMARandom Access (UORA) Grouping

The technique of utilizing a single gracilis functional muscle transfer to restore quadriceps function following sarcoma surgery

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plastic and Aesthetic Research 2019年第12期6卷 37-46页

作者： Christopher M.Nguyen Imran Ratanshi jennifer L.Giuffre edward W.Buchel Thomas E.j.Hayakawa Section of Plastic Surgery Department of SurgeryUniversity of ManitobaWinnipeg R3A 1R9Canada The Plastic Surgery Group Fraser Health AuthoritySurreyBritish Columbia V3V 1Z2Canada

Aim:Quadriceps strength and knee extension,the most important factors limiting the ability to rise from a chair,are crucial for walking at an appropriate speed,ascending and descending stairs,and performing activities such as running,dancing,and *** of the anterior compartment of the thigh,including all four quadriceps muscles,for the treatment of a sarcoma is uncommon;however,when necessary,it is very debilitating and adversely affects a patient's quality of life without functional ***,there are a limited number of complex and difficult reconstructions to restore quadriceps function that have been described with variable *** describe a simple technique that employs a single gracilis functional muscle transfer to replace essential quadriceps ***:This is a case series describing the use of either a free or pedicled single gracilis muscle to restore quadriceps function following sarcoma ***:Four patients underwent an anterior compartment sarcoma resection that resulted in a large segmental defect and/or denervation of all four quadriceps muscles such that no quadriceps function would remain without *** four patients underwent a functional reconstruction using a single *** of the living patients achieved British Medical Research Counsel Grade 4 strength,can achieve full knee extension,are able to navigate stairs,and are able to ambulate without a *** fourth patient unfortunately was deceased in under three months following his tumor ***:Despite its small size in comparison to the quadriceps muscles,with physiotherapy and training,the gracilis muscle demonstrates the capacity to hypertrophy and replace quadriceps function following limb salvage surgery.

关键词： Knee extension re-animation functional muscle transfer free flap pedicled flap sarcoma microsurgery quadriceps reconstruction

Risk Factors for Viral Non-Suppression among People Living with HIV and Major Depressive Disorder in Uganda

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 AIDS 2022年第2期12卷 43-54页

作者： Lilian Bulage Benedict Akimana justine D. Namuli Seggane Musisi josephine Birungi Micheal Etukoit Ramin Mojtabai jean B. Nachega edward j. Mills Etheldreda Nakimuli-Mpungu African Field Epidemiology Network Kampala Uganda Uganda Public Health Fellowship Program Kampala Uganda Ministry of Health Butabika National Referral Mental Hospital Kampala Uganda Department of Psychiatry College of Health Sciences Makerere University Kampala Uganda The AIDS Support Organization (TASO) Kampala Uganda Department of Mental Health Bloomberg’s School of Public Health Johns Hopkins University Baltimore USA Departments of Epidemiology Infectious Diseases and Microbiology Graduate School of Public Health University of Pittsburgh Pittsburgh USA Center for Infectious Disease Department of Medicine Faculty of Medicine and Health Sciences Stellenbosch University Cape Town South Africa Departments of International Health and Epidemiology Bloomberg’s School of Public Health Johns Hopkins University Baltimore USA Department of Clinical Epidemiology & Biostatistics McMaster University Hamilton Canada

Background: Several studies indicate that depression is associated with non-viral suppression among persons living with HIV (PLWH) using antiretroviral therapy (ART) worldwide. However, among PLWH with major depressive disorder, factors associated with non-viral suppression remain uncertain. We determined the prevalence and identified the factors associated with viral non-suppression among PLWH with major depressive disorder using ART in Northern Uganda. Method: A total of 30 primary care HIV clinics across three northern districts (Gulu, Kitgum, Pader) participated in the study. Using baseline data from the SEEK-GSP study, a cluster-randomized trial in northern Uganda (2016-2019) that involved 1140 PLWH with mild to moderate major depressive disorder;we examined the demographic, clinical, and psychosocial factors using standardized questionnaires. Data on viral load was abstracted from clinic records and dichotomized into suppressed (Results: We recruited 1140 PLWH. The viral non-suppression prevalence was 12.2%. In multivariable analysis, the only baseline psychosocial variable independently associated with non-viral suppression was suicide risk (PRR = 1.56, 95% CI: 1.05 - 2.32, p-value = 0.029). The prevalence odds for non-viral suppression were 56% higher among depressed PLWH with moderate to high suicide risk than those with low suicide risk. Among clinical variables, duration on ART ≥ 4 years was independently associated with non-viral suppression (PRR = 1.62, 95% CI: 1.09 - 2.32, p-value = 0.015). Conclusions: Suicide risk and longer duration on ART are associated with non-viral suppression among anti-retroviral therapy users with mild to moderate major depressive disorder in Uganda. As ART is scaled up across Sub-Saharan Africa, first-line psychological care for depression and its complications is urgently needed in established HIV treatment centers.

关键词： Depression Suicide Risk Anti-Retroviral Therapy Viral Suppression Uganda

Growth and Toxin Production by Microcystis Aeruginosa PCC 7806 (Kutzing) Lemmerman at Elevated Salt Concentrations

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 Environmental Protection 2011年第6期2卷 669-674页

作者： Ken Black Mete Yilmaz edward j. Phlips 不详

One of the most common and widespread bloom-forming cyanobacteria associated with toxin production is Microcystis aeruginosa (Kutzing) Lemmerman. While normally associated with fresh water environments, this toxigenic species has been observed at bloom concentrations in a number of major estuaries worldwide. This study examined the effect of salinity on growth and toxin production by M. aeruginosa strain PCC 7806 under controlled laboratory conditions. Salt concentrations above 12.6 ppt resulted in total cessation of growth. Toxin production was similarly affected, with cultures grown in salt concentrations of 4.6 ppt and above yielding less toxin than the control after 20 days of culture. Toxin concentrations after 20 days of culture were 40% of the control at 4.6 ppt. The relative proportion of extracellular to intracellular toxin increased over time in cultures with salt concentrations greater than 4.6 ppt. Extracellular toxins persisted in the media long after the cessation of growth. The results suggest that the influence of M. aeruginosa and/or its toxins can extend well out into estuarine environments under the influence of significant freshwater inputs.

关键词： Microcystin Cyanobacteria Estuaries

Aged rat heart: Modulation of age-related respiratory defects decreases ischemic-reflow injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Health 2013年第1期5卷 1-7页

作者： edward j. Lesnefsky Charles L. Hoppel Center for Mitochondrial Diseases Departments of Medicine and Pharmacology Case Western Reserve University Cleveland USA Departments of Medicine Biochemistry and Physiology Virginia Commonwealth University and McGuire Veterans Affairs Medical Center Richmond USA

Myocardial injury increases in the elderly heart during ischemia and reperfusion. Mitochondria, the key targets and sources of injury during ischemia and reperfusion, sustain ischemic damage to the electron transport chain that is superimposed upon age-related defects. In the adult heart, interventions to activate endogenous cytoprotective signaling systems meet in mitochondria to decrease cardiac injury. Unfortunately, these systems are largely ineffective in the aged heart. Thus, new treatment concepts are needed to reduce injury in the aged heart. Our group chose a strategy to directly treat the effector of cardiac injury in the aged heart, the mitochondria. We further utilized a novel approach to ask if the reversal of aging defects in cardiac mitochondria before ischemia could decrease ischemia-reperfusion injury in the heart. Three hours following treatment with the small molecule, nutriceutical acetylcarnitine (AcCN), oxidative phosphorylation as well as age-induced defects in electron transport chain complexes III and IV was corrected in the heart. When such hearts were then exposed to ischemia and reperfusion, cardiac injury was markedly reduced. Contraction during reperfusion improved and recovery became similar to that in adult hearts. Cardiac cell death was substantially reduced. Thus, age-related defects in electron transport are a key mechanism of the increased myocardial injury in the elderly heart during ischemia and reperfusion. Modulation of aging-induced defects in mitochondrial metabolism reduces cardiac injury from ischemia and reperfusion, and is a novel strategy to protect myocardium in the elderly patient at risk for an acute myocardial infarction.

关键词： Mitochondria Cytochrome Oxidase Complex III Myocardial Infarction Aging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

蓝方:口服降糖药物可用于糖尿病孕妇

糖尿病天地(临床) 2008年第2期2卷 87-89页

作者： edward j.Coetzee 彭晓韧邹大进 The Department of Obstetrics and Gynaecology Groote Schuur Hospital/University of Cape TownGroote SchuurSouth Africa

现已明确即使轻微的妊娠期糖尿病(GDM) (根据世界卫生组织1985年的标准为葡萄糖耐量减低),如果不治疗也会导致较高的围产期患病率甚至死亡率。随着肥胖在世界范围内的广泛流行,与肥胖密切相关的GDM患病率也像2型糖尿病一

关键词：糖尿病 GDM 代谢病胰岛素抵抗口服降糖药格列孕妇