检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

热浸镀锌层界面的微区电化学腐蚀行为

表面技术 2022年第9期51卷 217-225页

作者：林学亮王友彬辛延琛高锋韦悦周 Toyohisa fujita 广西大学广西有色金属及特色材料加工重点实验室南宁530004 广西大学资源环境与材料学院南宁530004

目的探究钢铁热浸镀锌的镀层/钢基体界面的微区电化学特性及腐蚀行为。方法采用扫描电化学显微镜(SECM)分析技术,研究镀层/钢基体界面在0.1 mol/L NaCl溶液腐蚀过程中微区电流的演变过程,结合扫描电镜(SEM)、能谱仪(EDS)、3D显微镜以及... 详细信息

目的探究钢铁热浸镀锌的镀层/钢基体界面的微区电化学特性及腐蚀行为。方法采用扫描电化学显微镜(SECM)分析技术,研究镀层/钢基体界面在0.1 mol/L NaCl溶液腐蚀过程中微区电流的演变过程,结合扫描电镜(SEM)、能谱仪(EDS)、3D显微镜以及X射线衍射技术(XRD)等分析腐蚀产物的物相组成与分布规律。结果在腐蚀过程中,镀锌钢的腐蚀产物主要分布在热浸镀锌层界面处靠近钢基体的一侧,在镀锌层表面的分布较少,腐蚀产物主要由Zn_(5)(OH)_(8)Cl_(2)、Zn_(5)(OH)_(6)(CO_(3))_(2)与ZnO等物相组成。在腐蚀开始阶段,钢基体区域的SECM还原电流(I=1.2)大于镀锌层(I=1.1)。随着腐蚀时间的延长,镀层/钢基体界面处的SECM还原电流整体降低,同时在界面靠近钢基体一侧存在电流凹陷区(I=1.0),表明腐蚀产物主要沉积在此处,并对镀层的腐蚀起到保护作用。此外,在腐蚀过程中氧气的消耗主要发生在钢基体区域,随着腐蚀时间的增加,镀层和钢基体表面的溶解氧含量都逐渐降低。结论在浸泡腐蚀过程中,镀锌层作为阳极,溶解生成Zn^(2+),并向钢基体区域扩散,同时钢基体表面消耗氧气,还原形成OH–向镀锌层区域扩散。Zn^(2+)与OH^(–)以及溶液中其他离子结合,生成腐蚀产物,在靠近镀层/钢基体界面处的钢基体一侧沉淀,对钢基体起到一定的保护作用。

关键词：微区电化学热浸镀锌界面扫描电化学显微镜腐蚀行为

Long-distance spread of Tembusu virus,and its dispersal in local mosquitoes and domestic poultry in Chongming Island,China

维普期刊数据库博看期刊

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

Infectious Diseases of Poverty 2023年第3期12卷 94-95页

作者： yuan Fang Tian Hang Li-Min yang Jing-Bo Xue Ryosuke fujita Xue-Song Feng Tian-Ge Jiang yi Zhang Shi-Zhu Li Xiao-Nong Zhou School of Global Health Chinese Center for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector BiologyWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghaiChina Laboratory of Sanitary Entomology Faculty of AgricultureKyushu UniversityFukuokaJapan Shanghai Chongming Dongtan National Nature Reserve ShanghaiChina

Background Chongming Island in China serves as a breeding and shelter point on the East Asian–Australasian *** resting frequency of migratory birds,abundance of mosquito populations,and the popular domestic poultry industry pose a potential risk of mosquito-borne zoonotic *** aim of this study is to explore the role of migratory birds in the spread of mosquito-borne pathogens and their prevalent status on the *** We conducted a mosquito-borne pathogen surveillance in 2021,in Chongming,Shanghai,***‑mately 67,800 adult mosquitoes belonging to ten species were collected to investigate the presence of faviviruses,alphaviruses,and orthobunyaviruses by *** and phylogenetic analyses were conducted to explore the virus genotype and potential nature *** survey was performed by ELISA to characterize Tembusu virus(TMUV)infection among domestic *** Two strains of TMUV and Chaoyang virus(CHAOV)and 47 strains of Quang Binh virus(QBV)were detected in 412 mosquito pools,with the infection rate of 0.16,0.16,and 3.92 per 1000 Culex tritaeniorhynchus,***‑thermore,TMUVs viral RNA was found in serum samples of domestic chickens and faecal samples of migratory *** against TMUV were detected in domestic avian serum samples,generally ranging from 44.07%in pigeons to 55.71%in *** analyses indicated that the TMUV detected in Chongming belonged to Cluster 3,Southeast Asia origin,and most closely related to the CTLN strain,which caused a TMUV outbreak in chickens in Guangdong Province in 2020,but distant from strains obtained previously in Shanghai,which were involved in the 2010 TMUV outbreak in *** We speculate that the TMUV was imported to Chongming Island through long-distance spreading by migratory birds from Southeast Asia,followed by spill over and transmission in mosquitoes and domestic avian species,threatening the local domestic *** addition,the exp

关键词： Chaoyang virus Emerging zoonotic vector-borne disease Insect-specifc favivirus Mosquito-borne virus Quang Binh virus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

新全球构造—后板块构造（前言）

大地构造与成矿学 1994年第3期18卷 280-281页

作者： fujita,y

Diffusion-weighted MRI in abdominal oncology:Clinical applications

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7期16卷 832-836页

作者： Reiji Sugita Kei Ito Naotaka fujita Shoki Takahashi Department of Radiology Sendai City Medical CenterSendai 983-0824Japan Department of Gastroenterology Sendai City Medical CenterSendai 983-0824Japan Department of Diagnostic Radiology Graduate School of MedicineTohoku UniversitySendai 980-8574Japan

Diffusion-weighted magnetic resonance imaging(DWI) provides image contrast that is different from that obtained by conventional magnetic resonance *** previously,DWI has been used to evaluate various diseases of the central nervous system,several technical advances have expanded the clinical applications of DWI beyond the central nervous *** a result,many reports have been published on the use of DWI in abdominal ***,abdominal DWI has now being focused on evaluation of patients with abdominal *** can be used for pretreatment tumor detection,characterization including predicting tumor response to therapy,monitoring tumor response during therapy,and follow-up study after treatment to detect possible tumor recurrence.

关键词： Diffusion weighted magnetic resonance imaging Abdominal neoplasms

Heterogeneity in supraglacial debris thickness and its role in glacier mass changes of the Mount Gongga

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 China Earth Sciences 2016年第1期59卷 170-184页

作者： ZHANG yong HIRABAyASHI yukiko fujita Koji LIU Shi yin LIU Qiao State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences Institute of Engineering Innovation The University of Tokyo Graduate School of Environmental Studies Nagoya University Institute of Mountain Hazards and Environment Chinese Academy of Sciences

在西藏的高原，许多冰河在他们的脱离地区有 supraglacial 碎片的广泛的封面，它由改变冰融化和集体损失的空间模式影响冰河反应到气候变化。不够的碎片厚度数据使分析地区性的碎片封面效果困难。山 Gongga 的海上的冰河被实质的减小在... 详细信息

在西藏的高原，许多冰河在他们的脱离地区有 supraglacial 碎片的广泛的封面，它由改变冰融化和集体损失的空间模式影响冰河反应到气候变化。不够的碎片厚度数据使分析地区性的碎片封面效果困难。山 Gongga 的海上的冰河被实质的减小在最近的十年在冰河区域和冰质量描绘了。从遥远地察觉到的数据估计的碎片层的热性质表明盖住碎片的冰河在这个区域，到全部的冰河区域的碎片盖子的比例从 1.74% ～ 53.0% 在上变化是主导的。用一个身体上基于的碎片封面效果评价模型，我们发现尽管 supraglacial 碎片的存在在重重地盖住碎片的冰河上有重要绝缘效果，融化在~上加速冰10.2%全部的脱离地区并且生产~的快速的消耗量25%盖住碎片的冰河，导致在盖住碎片、没有碎片的冰河之间的类似的集体损失。普遍碎片盖子也便于活跃终点区域的发展。在碎片封面效果的地区性的差别是明显的，强调为冰河质量在全世界在西藏的高原和另外的山脉改变的理解的碎片盖子的重要性。

关键词：冰川面积质量损失变化作用异质性贡嘎山覆盖效应厚度空间分布格局

Deciphering Starch Quality of Rice Kernels Using Metabolite Profiling and Pedigree Network Analysis

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

Molecular Plant 2012年第2期5卷 442-451页

作者： Miyako Kusano Atsushi Fukushima Naoko fujita yozo Okazaki Makoto Kobayashi Naoko fujita Oitome Kaworu Ebana Kazuki Saito RIKEN Plant Science Center Tsurumi Yokohama 230-0045 Japan KIHARA Institute for Biological Research Yokohama City University Totsuka Yokohama 244-0813 Japan Department of Biological Production Akita Prefectural University Akita 010-0195 Japan National Institute of Agrobiological Sciences 2-1-2 Kannondai Tsukuba Ibaraki 305-8602 Japan Graduate School of Pharmaceutical Sciences Chiba University Chiba 260-8675 Japan

The physiological properties of rice grains are immediately obvious to consumers. High-coverage metabolomic characterization of the rice diversity research set predicted a negative correlation between fatty acid and lipid levels and amylose/total starch ratio （amylose ratio）, but the reason for this is unclear. To obtain new insight into the relationships among the visual phenotypes of rice kernels, starch granule structures, amylose ratios, and metabolite changes, we investigated the metabolite changes of five Japonica cultivars with various amylose ratios and two knockout mutants （e 1, a Starch synthase Ilia （SSIIla）-deficient mutant and the SSIIla/starch branching enzyme （BE） double-knockout mutant 4019） by using mass spectrometry-based metabolomics techniques. Scanning electron microscopy clearly showed that the two mutants had unusual starch granule structures. The metabolomic compositions of two cultivars with high amylose ratios （Hoshiyutaka and yumetoiro） exhibited similar patterns, while that of the double-knockout mutant, which has an extremely high amylose ratio, differed. Rice pedigree network analysis of the cultivars and the mutants provided insight into the association between metabolic-trait properties and their underlying genetic basis in rice breeding in Japan. Multidimensional scaling analysis revealed that the Hoshiyutaka and yumetoiro cultivars were Indica-like, yet they are classified as Japonica subpopulations. Exploring metabolomic traits is a powerful way to follow rice genetic traces and breeding history.

关键词： starch quality traits amylose ratio metabolite profiling pedigree networks rice.

Influence of rolling parameters on dynamically recrystallized microstructures in AZ31 magnesium alloy sheets

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 Magnesium and Alloys 2015年第2期3卷 95-105页

作者： Lili Guo Fumio fujita School of Materials Science and Engineering Dalian Jiaotong UniversityLiaoningDalian116028China Department of Metallurgy Graduate School of EngineeringTohoku UniversityAobaSendai980-8579Japan

Conventional rolling experiments via the embedded pin in rolling sheet method were carried out at different reduction rates,starting rolling temperatures,and rolling speeds,and the effects of rolling parameters(i.e.,temperature,equivalent strain,and rolling time)on dynamically recrystallized(DRX)microstructures of AZ31 alloy during hot rolling were studied *** temperature-strain dependence of the high-angle grain boundary fraction(HAGB%)was examined through electron backscattered *** showed that as-rolled microstructures with high HAGB%may be obtained under average rolling temperatures of 270-320℃,equivalent strains higher than 0.8,and a rolling speed of 246 mm/*** results may be related to the DRX kinetics and dynamic recovery which are controlled by deformation temperature and ***%decreased with increasing rolling time(decreasing rolling speed),which is attributed to dynamic recovery,and the recrystallized grain size decreased as rolling time ***,further increases in rolling time increased average grain sizes but decreased mean subgrain sizes;these results are attributed to increases in the low-angle grain boundary(LAGB)length per unit area with rolling *** formation was controlled by dynamic recovery,which consistently follows polygonization or formation of new subgrains inside larger grains;hence,average subgrain sizes decreased with the rolling *** effect of dynamic recovery on HAGB and LAGB formation and their related mechanisms over a wide range of strains and temperatures were discussed in detail.

关键词： Magnesium alloys Hot rolling Dynamic recrystallization(DRX) Microstructure

Effects of scallop shell extract on scopolamine-induced memory impairment and MK801-induced locomotor activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2016年第7期9卷 643-647页

作者： yasushi Hasegawa Tatsuro Inoue Satoshi Kawaminami Miho fujita College of Environmental Technology Muroran Institute of Technology

Objective:To evaluate the neuroprotective effects of the organic components of scallop shells(scallop shell extract) on memory impairment and locomotor activity induced by scopolamine or 5-methyl-10,11-dihydro-5H-dibenzo(a,d) cyclohepten-5,10-imine(MK801).Methods:Effect of the scallop shell extract on memory impairment and locomotor activity was investigated using the y-maze test,the Morris water maze test,and the open field ***:Scallop shell extract significantly reduced scopolamine-induced short-term memory impairment and partially reduced scopolamine-induced spatial memory impairment in the Morris water maze *** shell extract suppressed scopolamine-induced elevation of acetylcholine esterase activity in the cerebral *** with scallop shell extract reversed the increase in locomotor activity induced by *** shell extract also suppressed the increase in locomotor activity induced by ***:Our results provide initial evidence that scallop shell extract reduces scopolamine-induced memory impairment and suppresses MK-801-induced hyperlocomotion.

关键词： Locomotor activity Memory impairment Scallop shell Schizophrenia

Comparative evaluation of processes for heavy metal removal from municipal solid waste incineration fly ash

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 Environmental Sciences 1998年第4期10卷 75-82页

作者： Masafumi Tateda Michihiko Ike Masanori fujita Department of Environmental Engineering Osaka UniversityJapan

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｈａｓｂｅｅｎｒｅｐｏｒｔｅｄｔｈａｔｍｕｎｉｃｉｐａｌｓｏｌｉｄｗａｓｔｅｉｎｃｉｎｅｒａｔｉｏｎｆｌｙａｓｈ（ＭＳＷＦＡ）ｃｏｎｔａｉｎｓｃｏｎｓｉｄｅｒａｂｌｅａｍｏｕｎｔｓｏｆｈ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｈａｓｂｅｅｎｒｅｐｏｒｔｅｄｔｈａｔｍｕｎｉｃｉｐａｌｓｏｌｉｄｗａｓｔｅｉｎｃｉｎｅｒａｔｉｏｎｆｌｙａｓｈ（ＭＳＷＦＡ）ｃｏｎｔａｉｎｓｃｏｎｓｉｄｅｒａｂｌｅａｍｏｕｎｔｓｏｆｈｅａｖｙｍｅｔａｌｓ（Ｂｅｒｇ，１...

关键词： municipal solid waste incineration fly ash heavy metal removal process process evaluation.