检索结果-南通市图书馆

Pseudotumoral acute cerebellitis associated with mumps infection in a child

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

World Journal of Clinical Cases 2017年第8期5卷 340-343页

作者： Houda Ajmi Mehdi Gaha Sameh Mabrouk Saida Hassayoun Noura Zouari Jalel Chemli Saoussen Abroug Pediatrics depart-ment Sahloul University Hospital Radiology department Sahloul University Hospital

Pseudotumoral cerebellitis in childhood is an uncommon presentation of cerebellitis mimicking a brain tumor. It often follows an inflammatory or infectious event, particularly due to varicella virus. Patients could have a wide clinical spectrum on presentation. Some patients may be asymptomatic or present at most with mild cerebellar signs, whereas others may suffer severe forms with brainstem involvement and severe intracranial hypertension mimicking tumor warranting surgical intervention. Imaging techniques especially multimodal magnetic resonance imaging represent an interesting tool to differentiate between posterior fossa tumors and acute cerebellitis. We describe a case of pseudotumoral cerebellitis in a 6-year-old girl consequent to mumps infection and review the literature on this rare association.

关键词： Acute cerebellitis Pseudotumoral cerebellitis Posterior fossa tumor Children Mumps

A new statistical method for mapping QTLs underlying endosperm traits

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2005年第14期50卷 1470-1476页

作者： HU Zhiqiu XU Chenwu Jiangsu Provincial Key Lab of Crop Genetics and Physiology Depart-ment of Agronomy Yangzhou University Yangzhou 225009 China

Genetic expression for an endosperm trait in seeds of cereal crops may be controlled simultaneously by the triploid endosperm genotypes and the diploid maternal genotypes. However, current statistical methods for mapping quantitative trait loci (QTLs) underlying endosperm traits have not been effective in dealing with the putative maternal genetic effects. Combining the quantitative genetic model for diploid maternal traits with triploid endosperm traits, here we propose a new statistical method for mapping QTLs con- trolling endosperm traits with maternal genetic effects. This method applies the data set of both DNA molecular marker genotypes of each plant in segregation population and the quantitative observations of single endosperms in each plant to map QTL. The maximum likelihood method implemented via the expectation-maximization algorithm was used to the estimate parameters of a putative QTL. Since this method involves the maternal effect that may contribute to en- dosperm traits, it might be more congruent with the genetics of endosperm traits and more helpful to increasing the preci- sion of QTL mapping. The simulation results show the pro- posed method provides accurate estimates of the QTL effects and locations with high statistical power.

关键词：胚乳特性遗传因子遗传模型染色体

Mechanism of influence of chloride ions on electrogenerative leaching of sulfide minerals

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 Central South University of Technology 2006年第4期13卷 379-382页

作者：王少芬方正 depart ment of Chemistry and Environmental Engineering Changsha University of Science and Technology School of Chemistry and Chemical Engineering Central South University

A dual cell system was used to study the influence of chloride ions on the electrogenerative leaching of sulfide minerals. The results show that the influences of chloride ions on a series of electrogenerative leaching system are similar, and chlorine ion is involved in the electrogenerative leaching process of sulfide minerals directly. The output power increases with the increase of Cl^- concentration. The influence on the electrogenerative leaching rate decreases when the Cl^- concentration reaches a certain value. The mechanisms of anodic reaction are deduced based on the reasonable hypothesis, and kinetic equations with respect to chlorine ions for each sulfide mineral are obtained. The kinetic equations show that when concentration of Cl^- is relatively low, the electrogenerative leaching rates are predicted to have 2/5,3/7,1/3 and 1/3 order dependence on Cl^- concentration for chalcopyrite concentrate,nickel concentrate, sphalerite and galena. As concentration of Cl^- increases, the correlative dependence of electrogenerative leaching rate on concentration of Cl^- becomes weak.

关键词： chloride ion electrogenerative leaching mechanism sulfide minerals

Sequential algorithms combining non-invasive markers and biopsy for the assessment of liver fibrosis in chronic hepatitis B

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

World Journal of Gastroenterology 2007年第4期13卷 525-531页

作者： Giada Sebastiani Alessandro Vario Maria Guido Alfredo Alberti depart-ment of Clinical and Experimental Medicine University of Pado-va Padova Italy department of Oncological and Surgical Sciences University of Padova Padova Italy

AIM： To assess the performance of several noninvasive markers and of our recently proposed stepwise combination algorithms to diagnose significant fibrosis （F ≥ 2 by METAVIR） and cirrhosis （F4 by METAVIR） in chronic hepatitis B （CHB）.METHODS： One hundred and ten consecutive patients （80 males, 30 females, mean age： 42.6 ± 11.3） with CHB undergoing diagnostic liver biopsy were included. AST-to-Platelet ratio （APRI）, Forns＇ index, AST-to-ALT Ratio, Goteborg University Cirrhosis Index （GUCD, Hui＇s model and Fibrotest were measured on the day of liver biopsy. The performance of these methods and of sequential algorithms combining Fibrotest, APRI and biopsy was defined by positive （PPV） and negative （NPV） predictive values, accuracy and area under the curve （AUC）. RESULTS： PPV for significant fibrosis was excellent （100%） with Forns and high （〉 92%） with APR1, GUCI, Fibrotest and Hui. However, significant fibrosis could not be excluded by any marker （NPV 〈 65%）. Fibretest had the best PPV and NPV for cirrhosis （87% and 90%, respectively）. Fibrotest showed the best AUC for both significant fibrosis and cirrhosis （0.85 and 0.76, respectively）. Stepwise combination algorithms of APR1, Fibrotest and biopsy showed excellent performance （0.96 AUC, 100% NPV） for significant fibrosis and 0.95 AUC, 98% NPV for cirrhosis, with 50%-80% reduced need for liver biopsy. CONCLUSION： In CHB sequential combination of APRI, Fibrotest and liver biopsy greatly improves the diagnostic performance of the single non-invasive markers. Need for liver biopsy is reduced by 50%-80% but cannot be completely avoided. Non-invasive markers and biopsy should be considered as agonists and not antagonists towards the common goal of estimating liver fibrosis.

关键词： Chronic hepatitis B Hepatic fibrosis Liverbiopsy Non-invasive markers Stepwise combinationalgorithms

Plexiform fibromyxoma of the small bowel: A case report

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 Clinical Cases 2018年第15期6卷 1067-1072页

作者： Wei-Guang Zhang Liang-Bi Xu Yi-Ning Xiang Chen-Hong Duan depart-ment of Endoscopy the Affiliated Hospital of Guizhou Medical University department of Pathology the Affiliated Hos-pital of Guizhou Medical University

BACKGROUND Plexiform fibromyxoma is a rare, special type of mesenchymal tumor. The most common presenting symptoms are anemia, hematemesis, and hematochezia, without sex or age predilection. The reported cases have mainly occurred in the gastric antrum and pylorus region, with some cases in the duodenum. CASE SUMMARY We report here a case of plexiform fibromyxoma in the upper segment of the jejunum, which was continuously followed up for 3 years after surgical removal. Plexiform fibromyxoma showed multinodular or plexiform growth. The cells in the tumor node were spindle-shaped but few in number and mitotic figures. Small blood vessels and mucous matrix were found among the tumor cells. Immunohistochemistry revealed that the plexiform fibromyxoma cells were positive for smooth muscle actin, focally positive for CD10, and negative for cytokeratin, CD117, DOG-1(discovered on GIST-1) desmin, S-100, epithelial membrane antigen, and CD34. Ki-67 labeling index was < 5%. Plexiform fibromyxoma showed benign biological behavior. After 3 years of consecutive postoperative follow-up, no obvious signs of metastasis or recurrence were found by imaging examination. CONCLUSION Plexiform fibromyxoma is a rare type of mesenchymal tumor. The diagnosis mainly depends on pathological examination, and it should be distinguished from other gastrointestinal mesenchymal tumors.

关键词： Plexiform fibromyxoma Gastrointestinal stromal tumor Plexiform angiomyxoid myofibroblastic tumor Small bowel Benign tumor Case report

Annular pancreas associated with duodenal carcinoma

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 Gastroenterology 2010年第25期16卷 3206-3210页

作者： Enrico Bronnimann Silke Potthast Tatjana Vlajnic Daniel Oertli Oleg Heizmann depart-ment of surgery University of Basel CH-4031 Basel Switzerland Institute of Diagnostic Radiology University Hospital Basel CH-4031 Basel Switzerland Institute of Pathology University of Basel CH-4031 Basel Switzerland

Annular pancreas (AP) is a rare congenital anomaly. Coexisting malignancy has been reported only in a few cases. We report what is, to the best of our knowledge, the first case in the English literature of duodenal adenocarcinoma in a patient with AP. In a 55-year old woman with duodenal outlet stenosis magnetic resonance cholangiopancreatography showed an aberrant pancreatic duct encircling the duodenum. Duodenojejunostomy was performed. Eight weeks later she presented with painless jaundice. Duodenopancreatectomy revealed a duodenal adenocarcinoma, surrounded by an incomplete AP. Thus, co-existent malignancy with AP can be present without obstructive jaundice and without being visible through preoperative diagnostics.

关键词： Duodenal carcinoma Annular pancreas Duodenopancreatectomy Whipples operation

Wet Permeability Characteristics of Double-layer Knitted Fabrics

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 Donghua University(English Edition) 2007年第4期24卷 554-555,559页

作者：王其奚柏君 The key Lab of Textile Science and Technology of Ministry of Education Donghua University depart ment of Textiles and Clothing Shaoxing University

In order to solve the problem that sweat flows back into the internal layer from the external layer in double-layer knits, a fabric structure model is set up and the conditions that keep the sweat from flowing back into the internal layer from the external layer are presented. It can be used to improve the design of the double-layer knits theoretically.

关键词： double-layer knit wet permeability model condition

Distributed Energy Management of Integrated Electricity-thermal Systems for High-speed Railway Traction Grids and Stations

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

CSEE Journal of Power and Energy Systems 2021年第3期7卷 541-554页

作者： Lizhou Jiang Zhaohong Bie Tao Long Haipeng Xie Yao Xiao Key Laboratory of Electrical Insulation and Power Equipment Smart Grid Key Laboratory of Shaanxi ProvinceDepart-ment of Electrical EngineeringXi'an Jiaotong UniversityXi'an 710049China

This paper proposes an integrated electricity-ther-mal energy management system(EMS)for high-speed ***,an operational model is built for the integrated electricity-thermal system,including a train operation EMS(TO-EMS)model and station operation EMS(SO-EMS)*** the TO-EMS model,traction grids(TGs)are formulated with a solvable second-order cone programming *** the SO-EMS model,station indoor thermal systems are taken into account,and the building heat exchange process and solar radiation influence upon station indoor temperature are also *** the TO-EMS and the SO-EMS are coordinated with an alternating direction method of the multipliers-based(ADMM-based)algo-rithm,protecting the privacy and interests both for the train dispatch center and *** demonstrate the effectiveness of the proposed railway EMS,a modified realistic high-speed railway segment with six stations in North China with summer and winter scenarios is studied.

关键词： Alternating direction method of multipliers algorithm distributed optimization railway energy management system(R-EMS) station thermal system traction grid(TG)

Notch3 regulates the activation of hepatic stellate cells

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 Gastroenterology 2012年第12期18卷 1397-1403页

作者： Yi-Xiong Chen Zhi-Hong Weng Shu-Ling Zhang depart-ment of Hepatology and Infectious Disease Union HospitalTongji Medical College Huazhong University of Science andTechnology Wuhan 430022 Hubei Province China

AIM： To investigate whether Notch signaling is involved in liver fibrosis by regulating the activation of hepatic stellate cells （HSCs）.METHODS： Immunohistochemistry was used to detect the expression of Notch3 in fibrotic liver tissues of patients with chronic active hepatitis. The expression of Notch3 in HSC-T6 cells treated or not with transforming growth factor （TGF）-β1 was analyzed by iramunofluorescence staining, The expression of Notch3 and myofibroblastic marker （z-smooth muscle actin （（z-SMA） and collagen 1 in HSC-T6 cells transfected with pcDNA3. I-N3ICD or control vector were detected by Western blotting and immunofluorescence staining. Moreover, effects of Notch3 knockdown in HSC-T6 by Notch3 siRNA were investigated by Western blotting and immunofluorescence staining.RESULTS： The expression of Notch3 was significantly up-regulated in fibrotic liver tissues of patients withchronic active hepatitis, but not detected in normal liver tissues. Active Notch signaling was found in HSC-T6 cells. TGF-β1 treatment led to up-regulation of Notch3 expression in HSC-T6 cells, and over-expression of Notch3 increased the expression of α-SMA and collagen I in HSC-T6 without TGF-β1 treatment. Interestingly, transient knockdown of Notch3 decreased the expression of myofibroblastic marker and antagonized TGF-β1 induced expression of α-SMA and collagen I in HSC-T6.CONCLUSION： Notch3 may regulate the activation of HSCs, and the selective interruption of Notch3 may provide an anti -fibrotic strategy in hepatic fibrosis.

关键词： Notch signaling Myofibroblast Liver fibrosis Hepatic stellate cells siRNA