检索结果-南通市图书馆

Sigmoid colonic carcinoma associated with deposited ova of Schistosoma japonicum:A case report

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

World Journal of Gastroenterology 2006年第37期12卷 6077-6079页

作者： wen-chang li Zhi-Gang Pan Yi-Hong Sun Department of General Practice Zhongshan Hospital Fudan University Shanghai China Department of General Surgery Zhongshan Hospital Fudan University Shanghai China

We report a case of sigmoid colonic carcinoma associated with deposited ova of Schistosoma japonicum. A 57-year old woman presented with a 10-mo history of left lower quadrant abdominal pain and a 2-mo history of bloody stools. She had a significant past medical history of asymptomatic schistosomiasis japonica and constipation. A colonoscopy showed an exophytic fragile neoplasm with an ulcerating surface in the sigmoid colon. During the radical operative procedure, we noted the partially encircling tumor was located in the distal sigmoid colon, and extended into the serosa. Succedent pathological analysis demonstrated the diagnosis of sigmoid colonic ulcerative tubular adenocarcinoma, and showed deposited ova of Schistosoma japonicum in both tumor lesions and mesenteric lymph nodes. Three days after surgery the patient returned to the normal bowel function with one defecation per day. These findings reveal that deposited schistosome ova play a possible role in the carcinogenesis of colorectal cancer.

关键词： Schistosomiasis japonica Sigmoid colonic carcinoma Deposited schistosome ova

Trimmable bandgap reference circuit with exponential curvature compensation

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

Journal of Electronic Science and Technology 2023年第3期21卷 52-62页

作者： Hong-Zhuan Chen Fei Chu wen-Tao Lu Tie-liang Zhang wen-chang li Wei Gao College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing210016China Beijing Microelectronics Technology Institute Beijing100076China Institute of Semiconductors Chinese Academy of SciencesBeijing100085China The Ninth Academy of China Aerospace Science and Technology Corporation Beijing100094China

This paper proposes an improved exponential curvature-compensated bandgap reference circuit to exploit the exponential relationship between the current gainβof the bipolar junction transistor(BJT)and the temperature as well as reduce the influence of resistance-temperature *** the degraded circuit performance caused by the process deviation,the trimmable module of the temperature coefficient(TC)is introduced to improve the circuit *** circuit has the advantages of simple structure,high linear stability,high TC accuracy,and trimmable *** consumes an area of 0.09 mm^(2)when fabricated by using the 0.25-μm complementary metal-oxide-semiconductor(CMOS)*** proposed circuit achieves the simulated power supply rejection(PSR)of about-78.7 dB@1 kHz,the measured TC of~4.7 ppm/℃over a wide temperature range from-55℃to 125℃with the 2.5-V single-supply voltage,and the tested line regulation of 0.10 mV/*** a high-performance bandgap reference circuit can be widely applied in high-precision and high-reliability electronic systems.

关键词： Bandgap reference Exponential curvature compensation Temperature coefficient(TC) Trimmable

Carcinoma ex pleomorphic adenoma of the trachea: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第17期7卷 2623-2629页

作者： Heng-Xing Gao Quan li wen-li chang Ya-Long Zhang Xiao-Zhi Wang Xue-Xue Zou Respiratory Department Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina Department of Radiology Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina Department of Pathology Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina

BACKGROUND Carcinoma ex pleomorphic adenoma (CXPA) is defined as a malignant salivary gland tumor arising from a primary or recurrent pleomorphic *** three cases of CXPA of the trachea have been reported in the *** SUMMARY We report a case of tracheal CXPA in a 55-year-old woman,who presented with a more than 3-mo history of progressive *** tomography of the neck and thorax revealed an inhomogeneous,broad-based lesion arising from the tracheal wall on the right *** revealed a subglottic neoplasm causing up to 90% luminal *** tumor was resected using a highfrequency electrosurgical snare combined with argon plasma *** and immunohistochemistry revealed that the tumor was a CXPA of the *** We report the fourth case of tracheal CXPA,and present the first instance of resection of CXPA using high-frequency electrosurgical snare and laser *** also discuss the pathogenesis,diagnosis,histopathology,and systemic therapy of this rare disease.

关键词： Case report Carcinoma ex pleomorphic adenoma Trachea Pleomorphic adenoma

Physicochemical properties and potential health effects of nanoparticles from pulverized coal combustion

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

Chinese Science Bulletin 2009年第7期54卷 1243-1250页

作者： YU DunXi XU MingHou YAO Hong liU XiaoWei ZHOU Ke wen chang li lin State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

Nanoparticles are thought to induce more severe health impacts than larger particles. The nanoparticles from coal-fired boilers are classified into three size fractions with a 13-stage low pressure impactor. Their physicochemical properties are characterized by the high-resolution field emission scanning electron microscope and X-ray fluorescence spectrometer (XRF). The results show that coal-derived nanoparticles mainly consist of individual primary particles of 20―150 nm and their aggregates. Inor-ganic nanoparticles primarily contain ash-forming elements and their aggregates have a dense struc-ture. Organic nanoparticles are dominated by the element carbon and their aggregates have a loose structure. Nanoparticles from the same boiler have a similar composition and are primarily composed of sulfur, refractory elements and alkali/alkaline elements. Some transition and heavy metals are also detected. For different boilers, greater differences are observed in the production of the nanoparticles and their composition, possibly due to the use of low-NOx burners. Coal-derived nanoparticles have a small size, large specific surface area and complicated chemical composition, and thus are potentially more harmful to human health.

关键词：无机纳米粒子煤粉燃烧健康影响理化性质场发射扫描电子显微镜 X射线荧光光谱仪 X射线荧光光谱法燃煤锅炉

Modified Thiele-Werner Rational Interpolation

在线全文

学校读者我要写书评

暂无评论

Journal of Mathematical Research and Exposition 2010年第4期30卷 653-663页

作者： chang wen li Xiao lin ZHU Le ZOU Department of Mathematics Huaibei Normal University Anhui 235000 P. R. China Department of Mathematics Hefei University of Technology Anhui 230009 P. R. China

Through adjusting the order of interpolation nodes, we gave a kind of modified Thiele-Werner rational interpolation. This interpolation method not only avoids the infinite value of inverse differences in constructing the Thiele continued fraction interpolation, but also simplifies the interpolating polynomial coefficients with constant coefficients in the Thiele-Werner rational interpolation. Unattainable points and determinantal expression for this interpolation are considered. As an extension, some bivariate analogy is also discussed and numerical examples are given to show the validness of this method.

关键词： interpolation modified Thiele-Werner algorithm unattainable point.

Geology and mineralization of the Pulang supergiant porphyry copper deposit(5.11 Mt)in Shangri-la,Yunnan Province,China:A review

在线全文

学校读者我要写书评

暂无评论

China Geology 2022年第4期5卷 662-695页

作者： wen-chang li Xiang-fei Zhang Hai-jun Yu Dong Tao Xue-long liu College of Land and Resources Engineering Kunming University of Science and TechnologyKunming 650093China Chengdu Center China Geological SurveyMinistry of Natural ResourcesChengdu 610081China Yunnan Geological Survey China Geological SurveyMinistry of Natural ResourcesKunming 650051China

The porphyry copper belt in the Geza island arc in southwestern China is the only Indosinian porphyry copper metallogenic belt that has been discovered and evaluated so *** Pulang porphyry copper deposit(also referred to as the Pulang deposit)in this area has proven copper reserves of 5.11×106 *** deposit has been exploited on a large scale using advanced mining methods,exhibiting substantial economic *** on many research results of previous researchers and the authors’team,this study proposed the following key insights.(1)The Geza island arc was once regarded as an immature island arc with only andesites and quartz diorite porphyrites *** understanding was overturned in this *** endmember components such as quartz monzonite porphyries and quartz monzonite porphyries have been identified in the Geza island arc,and the mineralization is mainly related to the magmatism of quartz monzonite porphyries.(2)Complete porphyry orebodies and large vein orebodies have developed in the Pulang *** orebody KT1 occurs in the transition area between the potassium silicate alteration zone of quartz monzonite porphyries and the sericite-quartz alteration *** of them have developed in the potassium silicate alteration *** main orebody occurs as large lenses at the top of the hanging wall of rock bodies,with an engineering-controlled length of 1920 m and thickness of 32.5‒630.29 m(average:187.07 m).It has a copper grade of 0.21%-1.56%(average:0.42%)and proven copper resources of 5.11×10^(6) t,which are associated with 113 t of gold,1459 t of silver,and 170×10^(3) t of molybdenum.(3)Many studies on diagenetic and metallogenic chronology,isotopes,and fluid inclusions have been carried out for the Pulang deposit,including K-Ar/Ar-Ar dating of monominerals(e.g.,potassium feldspars,biotites,and amphiboles),zircon U-Pb dating,and molybdenite Re-Os *** results show that the porphyries in the Pulang deposit are composite plutons a

关键词： Quartz monzonite porphyry Porphyry orebody Porphyry copper deposit Gold ore Compound mineralization Crust-mantle mixing source Indosinian Mineral exploration engineering Geza island arc Pulang Yunnan Province China

Identification of key genes involved in recovery from spinal cord injury in adult zebrafish

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2022年第6期17卷 1334-1342页

作者： wen-Yuan Shen Xuan-Hao Fu Jun Cai wen-chang li Bao-You Fan Yi-lin Pang Chen-Xi Zhao Muhtidir Abula Xiao-Hong Kong Xue Yao Shi-Qing Feng International Science and Technology Cooperation Base of Spinal Cord Injury Tianjin Key Laboratory of Spine and Spinal CordDepartment of OrthopedicsTianjin Medical University General HospitalTianjinChina Tianjin Medicine and Health Research Center Tianjin Institute of Medical&Pharmaceutical SciencesTianjinChina School of Medicine Nankai UniversityTianjinChina

Zebrafish are an effective vertebrate model to study the mechanisms underlying recovery after spinal cord *** subacute phase after spinal cord injury is critical to the recovery of neurological function,which involves tissue bridging and axon *** this study,we found that zebrafish spontaneously recovered 44%of their swimming ability within the subacute phase(2 weeks)after spinal cord *** this period,we identified 7762 differentially expressed genes in spinal cord tissue:2950 were up-regulated and 4812 were *** differentially expressed genes were primarily concentrated in the biological processes of the respiratory chain,axon regeneration,and cell-component *** genes were also mostly involved in the regulation of metabolic pathways,the cell cycle,and gene-regulation *** verified the gene expression of two differentially expressed genes,clasp2 up-regulation and h1m down-regulation,in zebrafish spinal cord tissue in *** enrichment analysis revealed that up-regulated clasp2 functions similarly to microtubule-associated protein,which is responsible for axon extension regulated by ***-regulated h1m controls endogenous stem cell differentiation after spinal cord *** study provides new candidate genes,clasp2 and h1m,as potential therapeutic intervention targets for spinal cord injury repair by *** experimental procedures and protocols were approved by the Animal Ethics Committee of Tianjin Institute of Medical&Pharmaceutical Sciences(approval ***-EAEP-Q-2019-02)on September 24,2019.

关键词： axon regeneration clasp2 endogenous neural stem cells h1m microtubule nanog neural regeneration neurogenesis spinal cord injury subacute phase

Flash Process-Based Complex Programmable Logical Device with 72 Macro Cells

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology of China 2007年第4期5卷 332-335页

作者： wen-chang li Ping li Wei li State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China （UESTC） Chengdu 610054 China

A complex programmable logical device （CPLD） based on conventional embedded Flash memory process with 72 macro cells is studied in the paper. Compared with the Flash cell array technology employed by foreign companies, this architecture exhibiting insystem reconfiguration and rapid response was manufactured by low cost fabrication process. The device architecture and critical cell design are also analyzed in detail in the paper. The CPLD was designed by full-custom ASIC technology and manufactured by 0.35 pm 3P3M Flash process with 72 macro cells and 5 V voltage supply. The measurement results indicate that the devices are able to operate above the frequency of 66.7 MHz with the pin delay less than 10 ns.

关键词： CPLD Flash process Macro cell System frequency.

Three-Dimensional Numerical Simulation of Splat Formation on Substrates in Plasma Spraying

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2011年第3期16卷 347-351页

作者：崔长文李强 College of Materials Science and Engineering Fuzhou University

Plasma sprayed coatings are built up by the accumulation of splats formed by the impacting,spreading and solidifying of molten droplets on the substrate.A three-dimensional computational model including heat transfer and solidification is established to simulate the formation process of a single splat using the computational fluid dynamics(CFD)software,*** fluid flow and energy equations are discretized and solved according to typical finite volume method on an unstructured grid.A volume of fluid(VOF)tracking algorithm is used to track the droplet flow with free *** order to understand the splat formation mechanism,the process of splat formation caused by impacting and spreading of a molten nickel droplet on a polished mild steel surface is *** this basis,the simulations of impact of a molten droplet on substrate with different conditions including the surface morphology,thermal conductivity,initial temperature of the substrate and the thermal contact resistance are *** results clearly show the effect of those parameters on the shape of the final splat and splash behaviors.

关键词： numerical simulation splat formation plasma spraying molten droplets