检索结果-南通市图书馆

(η^(5)-C_(5)H_(5))_(2)Nb[CH_(2)Si(CH_(3))_(3)]_(2)的晶体结构和EPR研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高等学校化学学报 1985年第2期6卷 103-108页

作者：刘举正 petersen,J.L. 吉林大学理论化学研究所美国West Virginia大学化学系

合成了(η^(5)-C_(5)H_(5))_(2)Nb[CH_(2)Si(CH_(3))_(3)]_(2)化合物,并测定了它的晶体结构及溶液和玻璃态固体的EPR;通过计算机模拟玻璃态固体EPR得到了g和T的分量;测得最高占据分子轨道的a^(2)/b^(2)=10.3。

关键词：晶体结构分子轨道计算机模拟玻璃态 EPR

网状Meta分析结论形成的方法:最小背景化框架

在线全文

学校读者我要写书评

暂无评论

中国循证医学杂志 2021年第9期21卷 1102-1109页

作者：栗梦婷朱鸿飞后亮瑛王琪田金徽陈耀龙杨克虎邓宏勇曾力楠张伶俐 Romina Brignardello-petersen 葛龙兰州大学公共卫生学院社会医学与卫生事业管理研究所兰州730000 兰州大学公共卫生学院循证社会科学研究中心兰州730000 兰州大学基础医学院循证医学中心兰州730000 甘肃省循证医学与临床转化重点实验室兰州730000 兰州大学健康数据科学研究院兰州730000 世界卫生组织指南实施与知识转化合作中心兰州730000 GRADE中国中心兰州730000 上海中医药大学中医健康协同创新中心上海201203 四川大学华西第二医院药学部成都610041 四川大学华西第二医院循证药学中心成都610041 出生缺陷与相关妇儿疾病教育部重点实验室成都610041 麦克马斯特大学卫生研究方法、证据和影响力系加拿大汉密尔顿L8S4L8

网状Meta分析的最大优势在于可量化比较针对同一疾病的不同干预措施,并按某一指标对其优劣进行排序。多种干预措施的纳入增加了网状Meta分析结果解读的复杂性,仅基于排序结果进行解读可能会存在误导性。目前,对网状Meta分析结果的解读... 详细信息

网状Meta分析的最大优势在于可量化比较针对同一疾病的不同干预措施,并按某一指标对其优劣进行排序。多种干预措施的纳入增加了网状Meta分析结果解读的复杂性,仅基于排序结果进行解读可能会存在误导性。目前,对网状Meta分析结果的解读尚无公认的标准。2020年11月,GRADE工作组基于网状Meta分析的GRADE分级结果,提出了2种网状Meta分析结论形成的方法:部分背景化框架(partially contextualised framework)和最小背景化框架(minimally contextualised framework)。本文结合具体实例,旨在对最小背景化框架的方法、原理和步骤进行介绍,以期为网状Meta分析制作者采用该方法呈现和解读结果提供指导。

关键词：网状Meta分析 GRADE方法结果呈现最小背景化框架

非退行性和非血管性痴呆的发病率和病因:一项人群研究

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（神经病学分册） 2006年第6期2卷 13-14页

作者： Knopman D.S. petersen R.C. 郭俊 Department of Neurology Mayo Clinic 200 First St SW Rochester MN 55905 United States Dr.

Background: Information on the incidence of nondegenerative and nonvascular dementia is limited. Design: We used the records-linkage system of the Rochester Epidemiology Project to ascertain incident cases of dementia in Rochester, Minn, from January 1, 1990, through December 31, 1994. To define causes of dementia, we reviewed all diagnoses, imaging study results, laboratory test results, and clinical courses, as recorded historically in the patient dossier. Results: We found 560 incident cases of dementia, and 60 of them (10.7%) had onset before the age of 70 years (younger-onset group). Forty-three cases (7.7%) were due to nondegenerative nonvascular causes and represented 30.0%of the total in the you nger-onset group, but only 5.0%of the total in the older-onset group (aged 70 -99 years). The most common nondegenerative nonvascular causes were cancer with or without brain metastases (n=13), chronic alcoholism (n=7), and chronic menta l illness (n=11). There were no cases of dementia due to normal-pressure hydroc ephalus, subdural hematoma, hypothyroidism, vitamin B12 deficiency, or neurosyph ilis. There were 2 individuals with acute confusion due to subdural hematoma and 1 with hypothyroidism whose cognition normalized with therapy. Conclusions: Non degenerative nonvascular causes were more common than expected in patients with a younger onset of dementia. None of the patients with dementia reverted to norm al with treatment of the putative reversible cause.

关键词：血管性痴呆发病率退行性人群研究甲状腺功能减退正常压力性脑积水维生素B12缺乏硬膜下血肿病例档案病因

在线全文

学校读者我要写书评

暂无评论

腐殖煤和Ⅲ型干酪根烃源岩的生油窗再研究

国外油气地质信息 2002年第4期 46-54,58页

作者： H.I.petersen 李志明张长江

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

牙科医生对口腔卫生服务体系的评价

口腔医学纵横 2002年第1期18卷 49-50页

作者：杜民权 PE petersen 台保军江汉郭颖黄薇武汉大学口腔医学院湖北武汉430079 School of Dentistry University of Copenhagen

目的 :分析牙科医生的日常工作量和牙医对口腔卫生服务的态度评价 ,有助于口腔卫生服务体系的制定和评价。方法 :根据武汉市卫生部门登记在册的牙科医生 ,采用整群抽样的方法随机选择 2 5 0名牙科医生进行开放式问卷调查。结果 :所调查... 详细信息

目的 :分析牙科医生的日常工作量和牙医对口腔卫生服务的态度评价 ,有助于口腔卫生服务体系的制定和评价。方法 :根据武汉市卫生部门登记在册的牙科医生 ,采用整群抽样的方法随机选择 2 5 0名牙科医生进行开放式问卷调查。结果 :所调查的 2 5 0名样本中 ,5 2 %为女性 ,牙科医生平均工作年限为 11.6年 ,平均使用 0 .8台牙椅 ,每位牙医平均每天看 15个病人。主要工作时间用于充填治疗和拔牙。 93 %的牙医认为中国口腔卫生服务强调治疗而忽视预防保健。结论

关键词：牙科医生口腔卫生预防保健

在线全文

学校读者我要写书评

暂无评论

Linux参考大全第2版

Occurrence of Nanobacteria-Like Particles in Renal Stones of a Southern Brazilian Population

1999年

作者：（美）（R.彼得森）（Richard petersen）希望图书创作室译

本书分六大部分26章，介绍了四个主要的Linux主题：Internet应用，Unix功能，系统管理以及编程。本书第一部分介绍Linux的安装、启动，以及Linux所包含的大量可下载的窗口管理器、工作平台的基本操作和概念。第二部分为用户在 Linux上... 详细信息

ISBN: (纸本)7900024026

本书分六大部分26章，介绍了四个主要的Linux主题：Internet应用，Unix功能，系统管理以及编程。本书第一部分介绍Linux的安装、启动，以及Linux所包含的大量可下载的窗口管理器、工作平台的基本操作和概念。第二部分为用户在 Linux上工作，教授了一套基本的Linux操作技术。第三部分详细地讨论了Linux 系统在Internet上的许多应用，介绍了如何通过Linux自动安装、使用Internet浏览器、服务器，以及诸多的Internet应用程序和Internet工具，还讨论了使用所述工具、应用程序进行网络应用。第四和第五部分介绍了Linux作为一种Unix操作系统的特点，讨论了Unix过滤器、She11编程、标准编辑器及其使用技巧。第六部分介绍了系统、网络和XWindows管理，以及Linux编程。这一部分前段特别强调了特殊系统管理工具的使用，包括如何通过Linux平台应用这些工具设置网络，配置文件、管理器、应用程序等。后段第23章以后讨论了Linux编程。本书是真正意义上的四书合一：一本Internet书、一本Unix书、一本系统管理的书和一本Linux编程的书，由此构成了本书――一本完整的Linux参考书。本书可供Linux用户以及所有微机用户使用、参考。

关键词： UNIX操作系统

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

Open Journal of Urology 2012年第1期2卷 1-5页

作者： Amauri Braga Simonetti Carlos Teodósio Da Ros Cintia de David Karen Campos Paulo Renato petersen Behar Eduardo Ribeiro Gelsa Edith Navarro Hidalgo Center of Andrology and Urology Porto Alegre Brazil

Purpose: Identifying the source of stone formation in recurrent stone formers has always been a big problem. Material and Methods: In this study kidney stones from 52 patients were submitted to direct examination by scanning electronic microscopy (SEM) after manual fracture and 27 calculi were cultured in Eagle’s Minimum Essential Medium (E-MEM) and Brain-Heart Infusion (BHI) for eight weeks at 37°C in 5% CO2 atmosphere. Twenty-seven powdered and demineralized stones were suspended in sterile PBS, filtered through 0.22 m-pore-size sterile filters Millex (Millipore, Massachusetts, USA) and submitted to DNA extraction (Quiagen-Brazil). Platinum PCR SuperMIX (GIBCO-BRL), primers (Invitrogen), and Ultra Pure Water (Advanced Biotechnologies, Columbia, MD) were used for PCR (Polymerase Chain Reaction), which was generally conducted for 30 or 35 cycles with annealing of primers for 40 sec at 55°C and extension for 1 min at 72°C. Results: In 36 out 52 (69%) kidney stones it was detected the presence of biofilm coating the mineral surface of the stone when examined by SEM, consisting of coccoid particles, isolated or clustered, with diameter of 500 nm or less. Eleven out 27 (41%) kidney stone cultures produced white-colored sediment on the bottom of the tubes after eight-week incubation, revealing tiny structures similar to those observed directly by SEM. These structures were similar in size and morphology to spherical apatite particles previously observed in human kidney stones and named as nanobacteria (NB). No PCR products were observed in the samples. Conclusion: We found a strong correlation between renal stones and calcifying nanoparticles (CNP) in this study and these results open a new insight on this area to explore the etiology of stone formation. Whether NB/CNP are truly microorganisms or self-propagating mineral compounds is still controversial and its contribution, if any, in apatite nucleation and crystal growth remains uncertain.

关键词： Nanobacteria Calcifying Nanoparticles Renal Stone

Decreased Expression of TRPM3 and mAChRM3 in the Small Intestine in Chronic Fatigue Syndrome/Myalgic Encephalomyelitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Clinical Medicine 2018年第5期9卷 467-480页

作者： Sonya Marshall-Gradisnik Marshall Fretel Natalie Eaton Helene Cabanas Cassandra Balinas Vinod Gopalan Daniel petersen Rachel Passmore Kevin Tang Mazhar Haque Alfred Lam Donald Staines School of Medical Science Griffith University Brisbane Australia The National Centre for Neuroimmunology and Emerging Diseases Menzies Health Institute Queensland Griffith University Brisbane Australia Gold Coast University Hospital Parklands Australia Mater Hill Gastroenterology South Brisbane Australia

Introduction: Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) is often associated with gastrointestinal disturbance and inflammatory markers;however, there have been no histological studies performed in the small intestine from CFS/ME patients. The aim of this investigation was to assess the expression of certain inflammatory markers and inflammatory receptors, namely transient receptor potential melastin 3 (TRPM3) ion channels and muscarinic acetylcholine M3 (mAChRM3) receptors, in small intestinal tissues in a case controlled study comprising a CFS/ME patient and a healthy non-fatigued control. Method: Immunohistochemistry was performed on a small intestinal biopsy from a CFS/ME patient (age = 50;female) with self-reported symptoms of gastrointestinal disturbance and a non-fatigued control (NFC), (age = 28;female). Semi-quantitative analysis of expression was undertaken for interferon-gamma (IFNy), interleukin-1 alpha (IL-1α), tumour necrosis factor-alpha (TNFα), TRPM3 ion channels and mAChRM3 acetylcholine receptors. Results: There was significantly decreased expression of TRPM3 in the CFS/ME patient (35% ±9%) and a significant decrease in mAChRM3 in the CFS/ME patient (54% ±9%). There was no difference in IL-1α between CFS/ME patient and NFC, however;there was an increase in IFNy (13% ±6%) in the CFS/ME patient compared to NFC. There was a difference observed in TNFα in CFS/ME compared to NFC. Conclusion: Differences were noted in the expression of specific TRP ion channels and cholinergic receptors in CFS/ME compared with NFC, with CFS/ME demonstrating decreased TRPM3 and mAChRM3. Further, IFNy was increased, and TNFα decreased, in the small intestine of the CFS/ME patient with reported gastrointestinal disturbance.

关键词： Chronic Fatigue Syndrome/Myalgic Encephalomyelitis Irritable Bowel TRPM3 mAChRM3 Small Intestine Inflammation

Percutaneous transluminal angioplasty balloons for endoscopic ultrasound-guided pancreatic duct interventions

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 Gastrointestinal Endoscopy 2022年第8期14卷 487-494页

作者： Jad P AbiMansour Barham K Abu Dayyeh Michael J Levy Andrew C Storm John A Martin Bret T petersen Ryan J Law Mark D Topazian Vinay Chandrasekhara Department of Gastroenterology and Hepatology Mayo ClinicRochesterMN 55905United States

BACKGROUND Endoscopic ultrasound(EUS)-guided main pancreatic duct(PD)access may be used when conventional endoscopic retrograde cholangiopancreatography(ERCP)techniques *** use of a percutaneous transluminal angioplasty balloon(PTAB),originally developed for vascular interventions,can be used to facilitate transmural(e.g.,transgastric)PD access and to dilate high-grade pancreatic *** To describe the technique,efficacy,and safety of PTABs for EUS-guided PD *** Patients who underwent EUS with use of a PTAB from March 2011 to August 2021 were retrospectively identified from a tertiary care medical center supply *** included 3-4 French angioplasty catheters with 3-4 mm balloons designed to use over a 0.018-inch *** primary outcome was technical *** outcomes included incidence of adverse events(AEs)and need for early *** A total of 23 patients were identified(48%female,mean age 55.8 years).Chronic pancreatitis was the underlying etiology in 13(56.5%)patients,surgically altered anatomy(SAA)with stricture in 7(30.4%),and SAA with post-operative leak in 3(13.0%).Technical success was achieved in 20(87%)*** AE rate was 26%(n=6).All AEs were mild and included 1 pancreatic duct leak,2 cases of post-procedure pancreatitis,and 3 admissions for post-procedural *** patients required early *** EUS-guided use of PTABs for PD access and/or stricture management is feasible with an acceptable safety profile and can be considered in patients when conventional ERCP cannulation fails.

关键词： Dilating balloon Pancreatic duct intervention Chronic pancreatitis Anastomotic stricture