检索结果-南通市图书馆

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第6期14卷 549-554页

作者： zhi-yu li Bin li yu-lian WU Qiu-ping XIE Department of Surgery the Second Affiliated HospitalSchool of MedicineZhejiang University

Left-sided portal hypertension(LSPH)followed by acute pancreatitis is a rare condition with most patients being *** cases where gastrointestinal(GI)bleeding is present,however,the condition is more complicated and the mortality is very high because of the difficulty in diagnosing and selecting optimal treatment.A successfully treated case with severe GI bleeding by transcatheter splenic artery embolization is reported in this *** patient exhibited severe uncontrollable GI bleeding and was confirmed as gastric varices secondary to LSPH by enhanced computed tomography(CT)scan and *** embolization,the bleeding stopped and stabilized for the entire follow-up period without any severe *** conclusion,embolization of the splenic artery is a simple,safe,and effective method of controlling gastric variceal bleeding caused by LSPH in acute pancreatitis.

关键词： Left-sided portal hypertension(LSPH) Gastric varices Acute pancreatitis Gastrointestinal bleeding Splenic artery embolization(SAE)

在线全文

学校读者我要写书评

暂无评论

基于GD32单片机的智能循迹小车的设计

机械工程与自动化 2024年第1期 149-150,154页

作者：余致立王玥刘江珊安徽理工大学人工智能学院安徽淮南232001

设计了一种基于单片机的智能循迹小车,以GD32E230芯片为核心,结合电磁循迹模块和超声波避障模块等智能小车感知模块实现电磁循迹、自动避障等功能。实验结果表明:智能小车能出色地完成实验任务,达到预期目标,可以为智能小车在物流运输... 详细信息

设计了一种基于单片机的智能循迹小车,以GD32E230芯片为核心,结合电磁循迹模块和超声波避障模块等智能小车感知模块实现电磁循迹、自动避障等功能。实验结果表明:智能小车能出色地完成实验任务,达到预期目标,可以为智能小车在物流运输等场景的应用中提供技术参考。

关键词：循迹小车智能控制单片机感知模块

Electrocatalytic Oxidation and Simultaneous Determination of Uric Acid,Xanthine,Hypoxanthine and Dopamine Based on β-Cyclodextrin Modified Glassy Carbon Electrode

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第6期28卷 1047-1053页

作者： GONG Wei DOU zhi-yu CUI li-li liU Da-jun HE Xing-quan Department of Chemistry and Chemical Engineering Changchun University of Science and Technology Changchun 130022 P. R. China

A novel covalently modified glassy carbon electrode with β-cyclodextrin was prepared via electropolymerization technique for the simultaneous determination of uric acid（UA）,xanthine（XA）,hypoxanthine（HX） and dopamine（DA）.This new electrode presented an excellent electrocatalytic activity towards the oxidation of UA,XA,HX and DA by cyclic voltammetry（CV） *** oxidation peaks of the four compounds were well defined and had the enhanced peak *** separation potentials of the oxidation peaks for DA-UA,UA-XA and XA-HX were 150,390 and 360 mV in CV,*** means of differential pulse voltammetry（DPV） method,the calibration curves in the ranges of 10―225,5―105,10―170 and 5―150 μmol/L were obtained for UA,XA,HX and DA,*** lowest detection limits（S/N=3） were 5,1.25,5 and 1.5 μmol/L for UA,XA,HX and DA,*** practical application of the modified electrode was demonstrated by the determination of DA in hydrochloride injection and UA,XA,HX in human urine samples.

关键词： β-Cyclodextrin Uric acid Xanthine Hypoxanthine Dopamine

Design,synthesis and antitumor activity of 3-substituted quinolone derivatives (Ⅰ)

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第12期19卷 1395-1397页

作者： Hua Wang Qi Dong You zhi yu li Yi Quan Zou Department of Medicinal Chemistry China Pharmaceutical University Nanjing 210009 China

A series of quinolone derivatives containing benzimidazole, benzoxazole or benzothiazole ring were synthesized. The cytotoxicity of 12 new compounds was evaluated in KB, Be17402, A2780 and HT-29 cell lines. Most of synthesized compounds showed moderate inhibitory activity against cancer cells. The inhibitory activities of 6k, against KB and A2780 tumor ceils are comparable to that of topotecan, one of topoisomerase I inhibitors.

关键词： Quinolone derivatives Synthesis Antitumor

Preparation of Ultra-High-Speed Casein Trade Mark Adhesive

在线全文

学校读者我要写书评

暂无评论

复旦学报（自然科学版） 2005年第5期44卷 891-892页

作者： Xiong-zhi Wu yu-Jiao li Key Laboratory of Nonferrous Materials and New Processing Technology Ministry of EducationDepartment of Material and Chemical Engineering Guilin University of Technology Guilin541004 China

In present trade mark adhesives for beer bottle labeling are mostly prepared based on starch[1] ,polyvinyl formal[2] and their derivants[3-5] ,but they can only be applied to the labeling speed of 20 000 bottle/h and their water proofness are not satisfactory, especially when the water temperature is 0℃ below. The application of metal foil requires that sealing and labeling must be finished at the same time, but different penetrating speed of water in metal foil and paper label causes different drying speed, and also, the labeling speed and need of iced beer are increasing now, so these changes result in more strict requirements for *** this paper the chelating casein adhesive was obtained with casein as main moldings, urea as dispersing agent, starch as auxiliary, and ZnSO4 as cross-linked agent. The effects of dispersing agent, cross-linked agent and starch on the performances of adhesive were investigated.

关键词：酪蛋白粘合剂螯合效应淀粉

Effect of Fibulin-5 on cell proliferation and invasion in human gastric cancer patients

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2014年第10期7卷 787-791页

作者： Xiao-yu Shi liang Wang Chun-Hui Cao zhi-yu li Jian Chen Chen li Department of General Surgery the Second Affiliated Hospital of Zhejiang University School of Medicine

Objective:To explore the effect of Fibulin-5 expression on cell proliferation and invasion in human gastric cancer ***:Fibulin-5 expression was detected in 56 samples of surgically resected gastric cancer and paired noncancerous tissues using qRT-PCR and ***-5 was knocked dowu by Fibulin-5 shRNA in MGC-803 cells,then Brdu cell proliferation and transwell invasion assays were used to determine cell proliferation and ***:The level of Fibulin-5 mRNA in gastric cancer tissues was significantly higher as compared with that in normal tumor-adjacent tissues(Plin-5 protein in cancer and noucancerous tissues was consistent with mRNA expression(Plin-5 protein expression in tumor tissues with poorly *** node metastasis and advanced TNM tumor stage was significantly higher(Plin-5 was obviously knocked down by Fibulin-5 shRNA(Plin-5 knockdown significantly inhibited cell proliferation and invasion in MGC-803 cells(Plin-5 is associated with the malignant clinicopathologic parameters in gastric cancer and Fibuliu-5 knockdown inhibits cell proliferation and invasion in MGC-803 *** Fibulin-5 may act as a key factor in the progression of gastric cancer.

关键词： Fibulin-5 Gastric cancer Clinical significance Proliferation Invasion

A comprehensive review on microchannel heat sinks for electronics cooling

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

International Journal of Extreme Manufacturing 2024年第2期6卷 133-162页

作者： zhi-Qiang yu Mo-Tong li Bing-Yang Cao Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

The heat generation of electronic devices is increasing dramatically,which causes a serious bottleneck in the thermal management of electronics,and overheating will result in performance deterioration and even device *** the development of micro-machining technologies,the microchannel heat sink(MCHS)has become one of the best ways to remove the considerable amount of heat generated by high-power *** has the advantages of large specific surface area,small size,coolant saving and high heat transfer *** paper comprehensively takes an overview of the research progress in MCHSs and generalizes the hotspots and bottlenecks of this *** heat transfer mechanisms and performances of different channel structures,coolants,channel materials and some other influencing factors are ***,this paper classifies the heat transfer enhancement technology and reviews the related studies on both the single-phase and phase-change flow and heat *** comprehensive review is expected to provide a theoretical reference and technical guidance for further research and application of MCHSs in the future.

关键词： microchannel heat sink thermal management of electronics microscale heat transfer heat transfer enhancement

Performance improvement of magneto-acousto-electrical tomography for biological tissues with sinusoid-Barker coded excitation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第9期27卷 346-353页

作者： Zheng-Feng yu Yan Zhou yu-zhi li Qing-yu Ma Ge-Pu Guol Juan Tu Dong Zhang Jiangsu Provincial Engineering Laboratory of Audio Technology School of Physics and TechnologyNanjing Normal UniversityNanjing 210023China Institute of Acoustics Nanjing UniversityNanjing 210093China

By combining magnetics, acoustics and electrics, the magneto-acoustic-electrical tomography（MAET） proves to possess the capability of differentiating electrical impedance variation and thus improving the spatial resolution. However,the signal-to-noise ratio（SNR） of the collected MAET signal is still unsatisfactory for biological tissues with low-level electrical conductivity. In this study, the formula of MAET measurement with sinusoid-Barker coded excitation is derived and simplified for a planar piston transducer. Numerical simulations are conducted for a four-layered gel phantom with the 13-bit sinusoid-Barker coded excitation, and the performances of wave packet recovery with side-lobe suppression are improved by using the mismatched compression filter, which is also demonstrated by experimentally measuring a three-layered gel phantom. It is demonstrated that comparing with the single-cycle sinusoidal excitation, the amplitude of the driving signal can be reduced greatly with an SNR enhancement of 10 dB using the 13-bit sinusoid-Barker coded excitation. The amplitude and polarity of the wave packet filtered from the collected MAET signal can be used to achieve the conductivity derivative at the tissue boundary. In this study, we apply the sinusoid-Barker coded modulation method and the mismatched suppression scheme to MAET measurement to ensure the safety for biological tissues with improved SNR and spatial resolution, and suggest the potential applications in biomedical imaging.

关键词： magneto-acousto-electrical tomography sinusoid-Barker coded excitation mismatched compression filter side lobe suppression

Surface decoration of mesocarbon microbeads with multifunctional TiNbO_(4-x)@C coating layer as high rate and stable anode of li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第5期43卷 2053-2066页

作者： Jia-Mei Lai zhi-Min Zou yu Bai yu-Tao Xing Chun-Hai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China Shanghai XFH Science and Technology Development Co. Ltd.Shanghai 200949China Fujian XFH New Energy Materials Co. Ltd.Yong'an 366000China Shenzhen XFH Science and Technology Co. Ltd.Shenzhen 518071China Laboratorio de Microscopia Eletronica de Alta Resolucao Centro de Caracterizagao Avangada Para a Industria de Petroleo(LaMAR/CAIPE)Universidade Federal FluminenseNiteroiRJ 24210-346Brazil

Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of li-ion batteries than exploring alternative novel anode ***,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are employed as multifunctional decoration substances in combination with a carbon coating layer to improve the rate and cycle properties of mesocarbon microbeads(MCMBs).As compared to pristine MCMB,the li^(+)diffusion coefficients of the composite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@***,the overcharge and voltage polarization of the composite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO_(4-x).Moreover,the amorphous li_(y)TiNbO_(4-x) converted from TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the composite anodes from the second *** of these functions of TiNbO_(4-x)@Ccoating layer have directly contributed to the improved rate and cycle performance of the MCMB/TiNbO_(4-x)@C composite *** one containing 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m Ah·g^(-1)at 10C(1C=372 m A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all much superior to those of pristine MCMB.

关键词： li-ion batteries MCMB TiNbO_(4-x)@C Surface decoration Rate capability

Study on the optimal incident proton energy of ^(7)li(p,n)^(7)Be neutron source for boron neutron capture therapy

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第3期35卷 170-180页

作者： Yi-Nan Zhu Zuo-Kang lin Hai-Yan yu Ye Dai zhi-Min Dai Xiao-Han yu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Science Beijing 100049China

Boron neutron capture therapy(BNCT)is recognized as a precise binary targeted radiotherapy technique that effectively eliminates tumors through the^(10)B(n,α)^(7)li nuclear *** various neutron sources,accelerator-based sources have emerged as particularly promising for BNCT ***^(7)li(p,n)^(7)Be reaction is highly regarded as a potential neutron source for BNCT,owing to its low threshold energy for the reaction,significant neutron yield,appropriate average neutron energy,and additional *** study utilized Monte Carlo simulations to model the physical interactions within a lithium target subjected to proton bombardment,including neutron moderation by an MgF_(2)moderator and subsequent BNCT dose analysis using a Snyder head *** study focused on calculating the yields of epithermal neutrons for various incident proton energies,finding an optimal energy at 2.7 ***,the Snyder head phantom was employed in dose simulations to validate the effectiveness of this specific incident energy when utilizing a^(7)li(p,n)^(7)Be neutron source for BNCT purposes.

关键词： Boron neutron capture therapy ^(7)li(p,n)7Be neutron source Incident proton energy Monte Carlo simulation