检索结果-南通市图书馆

World Journal of Gastroenterology 2005年第23期11卷 3518-3522页

作者： Kent-man Chu ka-Fai Kwok Simon Law kam-Ho Wong Department of Surgery

AIm: To assess the clinical characteristics of Helicobacterpylori(H pylori) negative duodenal ***: Patients with an endoscopic diagnosis of duodenal ulcer between 1996 and 2002 were included in the present study. Patients were considered to be negative for Hpylori, if both histological examination and rapid urease test of biopsy specimens were negative. A comparison was made between patients with H pyloripositive and negative duodenal ***: A total of 1 343 patients were studied. Their mean age was 54.7±0.5 years. There was a male preponderance (m:F = 2.5:1). Three hundred and ninetyeight patients (29.6%) did not have H pylori infection. The annual proportion of patients with H pylori negative duodenal ulcers increased progressively from 1996 to2002. On multivariate analysis, patients with H pylorinegative duodenal ulcer were more likely to be older, have concomitant medical problem, pre-existing malignancy, recent surgery, underlying sepsis, or taken non-steroidal anti-inflammatory drugs. In terms of clinical presentations, patients with H pylori negative duodenal ulcer were more likely to present with bleeding, multiple ulcers and larger ***: The proportion of patients with H pylori negative duodenal ulcers is on the rise because of a continued drop in incidence of H pylori positive duodenalulcers in recent years. Such patients have distinct clinical characteristics and it is important to ascertain the H pylori status before starting eradication therapy.

关键词： Helicobacter pylori Duodenal ulcer

青藏高原冰芯记录揭示早-中全新世发生多次融水事件（英文）

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

Science Bulletin 2024年第3期 375-381页

作者：庞洪喜张王滨吴霜叶 Theo m.Jenk margit Schwikowski 侯书贵 Key Laboratory of Coast and Island Development of ministry of Education School of Geography and Ocean Science Nanjing University Frontiers Science Center for Critical Earth material Cycling Nanjing University Department of Geology and Environmental Geosciences University of Dayton Laboratory of Environmental Chemistry Paul Scherrer Institute Oeschger Centre for Climate Change Research University of Bern School of Oceanography Shanghai Jiao Tong University

Understanding the impact of meltwater discharge during the final stage of the Laurentide Ice Sheet(LIS)has important implications for predicting sea level rise and climate change. Here we present a highresolution ice-core isotopic record from the central Tibetan Plateau(TP), where the climate is sensitive to the meltwater forcing, and explore possible signals of the climate response to potential LIS meltwater discharges in the early to mid-Holocene. The record shows four abrupt large fluctuations during the7–9 ka BP(kiloannum before present), reflecting large shifts of the mid-latitude westerlies and the Indian summer monsoon(ISm) over this period, and they corresponded to possible LIS freshwater events documented in other paleoclimate records. Our study suggests that multiple rapid meltwater discharge events might have occurred during the final stage of LIS. The finding implies the possibility of rapid sea level rise and unstable climate in the transition zone between the mid-latitude westerlies and the ISm due to fast polar ice retreat under the anthropogenic global warming.

关键词：

Endometrial response to conceptus-derived estrogen and interleukin-1β at the time of implantation in pigs

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2018年第3期9卷 531-547页

作者： Hakhyun ka Heewon Seo Yohan Choi Inkyu Yoo Jisoo Han Department of Biological Science and Technology Yonsei University Department of Veterinary Integrated Biosciences Texas A&M University College Station Department of Obstetrics and Gynecology University of Kentucky College of Medicine

The establishment of pregnancy is a complex process that requires a well-coordinated interaction between the implanting conceptus and the maternal uterus. In pigs, the conceptus undergoes dramatic morphological and functional changes at the time of implantation and introduces various factors, including estrogens and cytokines,interleukin-1β2(IL1 B2), interferon-γ(IFNG), and IFN-δ(IFND), into the uterine lumen. In response to ovarian steroid hormones and conceptus-derived factors, the uterine endometrium becomes receptive to the implanting conceptus by changing its expression of cell adhesion molecules, secretory activity, and immune response. Conceptus-derived estrogens act as a signal for maternal recognition of pregnancy by changing the direction of prostaglandin(PG) F2αfrom the uterine vasculature to the uterine lumen. Estrogens also induce the expression of many endometrial genes,including genes related to growth factors, the synthesis and transport of PGs, and immunity. IL1 B2, a pro-inflammatory cytokine, is produced by the elongating conceptus. The direct effect of IL1 B2 on endometrial function is not fully understood. IL1 B activates the expression of endometrial genes, including the genes involved in IL1 B signaling and PG synthesis and transport. In addition, estrogen or IL1 B stimulates endometrial expression of IFN signaling molecules,suggesting that estrogen and IL1 B act cooperatively in priming the endometrial function of conceptus-produced IFNG and IFND that, in turn, modulate endometrial immune response during early pregnancy. This review addresses information about maternal-conceptus interactions with respect to endometrial gene expression in response to conceptus-derived factors, focusing on the roles of estrogen and IL1 B during early pregnancy in pigs.

关键词： Conceptus Endometrium Estrogen Interleukin-1β Pig Uterus

在线全文

学校读者我要写书评

暂无评论

甜菜苗期的生长效应

四川甘蔗 1989年第4期 50-52页

作者： m.,ka 李华富

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

在大气中和液体中对固体表面的STm观察

电子器件 1994年第3期17卷 135-137页

作者：宋建平 m.ka 西安交通大学电子工程系

利用扫描隧道显微镜（ＳＴＭ）在液体中和大气中对同一区域的固体表面进行观察，发现了在水中和大气中测得的ＳＴＭ表面形貌并不相同，在水中测得的样品表面比在大气中测得的显得光滑，并对此现象进行了初步讨论。

关键词：扫描隧道显微镜固-液界面观察

在线全文

学校读者我要写书评

暂无评论

地电法测定煤层的构造变化和煤质变化

国外地质勘探技术 1989年第2期 28-31页

作者： J.CSO’ka’S m’.DOBRO’ka A’.GYULAI 王杰

引言为确保煤矿生产的效率和安全,需要查明煤层的构造和地层特征。地而地球物理勘探往往不能很准确地获得煤层的构造信息。如果在煤层回采期间遇到了断层、煤层尖灭或夹石层,那么不仅可能会影响煤炭产量,

关键词：地电法测深水深测量视电阻率地层煤层

Flexible microbubble-based Fabry-Pérot cavity for sensitive ultrasound detection and wide-view photoacoustic imaging

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2020年第10期8卷 1558-1565页

作者： JUN mA YANG HE XUE BAI LI-PENG SUN ka CHEN KYUNGHWAN OH BAI-OU GUAN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 511443China Photonic Device Physics Laboratory Department of PhysicsYonsei UniversitySeoul 033722South Korea

Interaction of acoustic waves and microbubbles occurs in numerous biomedical applications including ultrasound imaging,drug delivery,lithotripsy treatment,and cell manipulation,wherein the acoustically driven microbub-blcs routincly act as active microscale oscillators or *** contrast,microbubbles were utilized here as passive reccivers to detect broadband ultrasound waves in aqueous *** microbubble was photo-thermally generated on a microstructured optical fiber(mOF)tip,forming a flexible Fabry-Perot cavity whose gas-water interface was sensitive to ultrasound *** mOF severed as both a low-loss waveguide and a compact light condenser,allowing high-efficiency generation and stabilization of ultrasmall *** with all-fiber interferometry,a 10 um diameter microbubble exhibited a low noise-cquivalcnt pressur elevei of^3.4 mPa/Hz^1/2 and a broad bandwidth of^0.8 mHz,capable of detecting weak ultrasounds emittedfrom red blood cells irradiated by pulsed laser *** advantages of high sensitivity,compact size,and low cost,the microbubble-based ultrasound sensor has great potential in biomedical imaging and sensing applications.

关键词： microstructure bubble cavity

A Climatic Utility Index for the Analysis of the Expected Changes of Cherry and Sour Cherry Production in Central Hungary,Regarding Climate Change

在线全文

学校读者我要写书评

暂无评论

A Climatic Utility Index for the Analysis of the Expected Ch...

Outcome of severely injured trauma patients at a designated trauma centre in the Hong Kong Special Administrative Region

2012 International Conference on Future Environment and Energy（ICFEE 2012）

作者： márta Gaál Károly Szenteleki Zoltán mézes Réka Homoródi márta Ladány Corvinus University of Budapest H-1118 Budapest Villányi út 29 Hungary University of Debrecen H-4032 Debrecen B sz rményi út 138. Hungary

Production security and risk of a given plant are basically determined by climatic factors the change of which is a great challenge for the *** paper focuses on the climatic conditions of cherry and sour cherry production in Central Hungary in three time periods:1961-1990 as a reference,2021-2050 as the near future and 2071-2100 for the long-term analysis.A climatic utility index is introduced based on climatic factors and experts’ suggestions and *** future changes are evaluated by using the predictions of regional climate model RegCm3.1 downscaled to the Carpathian *** show that in the near future fruit cracking risk of cherry could be higher,but in overall the expected changes are mostly favourable for both cherry and sour cherry production in *** the end of the century irrigation may be required to maintain the production security and the high standard quality of *** is also advised to re-evaluate the varieties according to the indicated changes,as a new orchard planted nowadays will have many productive years in the considered future periods.

关键词： climate change cherry production sour cherry production climatic risk climatic year types climatic utility index

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

Chinese medical Journal 2010年第10期123卷 1251-1254页

作者： LEUNG ka Kit Gilberto HO Wendy TONG King Hung Daniel YUEN Wai Key Trauma Service Queen Mary Hospital and The University of Hong Kong The Hong Kong Special Administrative Region (HKSAR) China

Background The Hong Kong Special Administrative Region （HKSAR） of the People＇s Republic of China （PRC） has seen significant changes in its trauma service over the last ten years including the implementation of a regional trauma system. The author＇s institution is one of the five trauma centres designated in 2003. This article reports our initial clinical experience. methods A prospective single-centre trauma registry from January 2004 to December 2008 was reviewed. The primary clinical outcome measure was hospital mortality. The Trauma and Injury Severity Score （TRISS） methodology was used for bench-marking with the North America major Trauma Outcome Study （mTOS） database. Results There were 1451 patients. The majority （83.9%） suffered from blunt injury. The overall mortality rate was 7.8%. Severe injury, defined as the Injury Severity Score 〉15, occurred in 22.5% of patients, and was associated with a mortality rate of 31.6%. A trend of progressive improvement was noted. The m-statistic was 0.99, indicating comparable case-mix with the mTOS. The Z- and W-statistics of each individual year revealed fewer, but not significantly so, number of survivors than expected. Conclusions Trauma centre designation was feasible in the HKSAR and was associated with a gradual improvement in patient care. Trauma system implementation may be considered in regions equipped with the necessary socio-economic and organizational set-up.

关键词： trauma, nervous system outcome trauma and injury severity score Hong Kong, China