检索结果-南通市图书馆

Microstructure,mechanical property and corrosion behavior of porous ti-ta-Nb-Zr

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2020年第3期5卷 564-568页

作者： B.Q.li r.Z.Xie X.lu Mechanics Institute Jinzhong UniversityJinzhong030619China liaoning Key Materials laboratory for railway School of Materials Science and EngineeringDalian Jiaotong UniversityDalian116028China

In this paper,biomedical porous ti-Nb-ta-Zr with 40%porosity and 166±21μm macro-pore size was successfully fabricated by space holder *** microstructure,Vickers hardness,compressive and electrochemistry behavior were *** results that a few second phases exist inβmatrix of the porous *** Young's modulus is 0.8 GPa,close to 0.01-3 GPa for trabecular *** total recovery strain ratio and pseudoelastic strain ratio are 8.8%and 2.7%,*** fails mainly by brittle cleavage with the fan-shaped and smooth cleaved ***,local ductile fracture by a few dimples and a small amount of transcrystalline fracture with the cleavage of similarly oriented laths in a colony are observed on the fracture *** impedance spectrum of porous ti-Nb-ta-Zr has the characteristics of half capacitive arc resistance,showing good corrosion resistance in SBF solution.

关键词： Porous ti-Nb-ta-Zr alloy Macro-pore structure Compressive property Electrochemistry behavior

transparent conductive Sno_(2)thin films via resonant ta doping

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 China Materials 2023年第1期66卷 264-271页

作者： Vedaste Uwihoreye Zhenni Yang Jia-Ye Zhang Yu-Mei lin Xuan liang lu Yang Kelvin H.l.Zhang College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China

transparent conductive oxide(tCo)thin films are highly desired as electrodes for modern flat-panel displays and solar *** indium-free tCo materials are highly needed,because of the scarcity and the high price of *** on the mechanism of resonant doping,ta has been identified as an effective dopant for Sno_(2)to achieve highly conductive and transparent *** this work,we fabricated a series of ta-doped Sno_(2)thin films(Sn_(1-x)ta_(x)o_(2),x=0.001,0.01,0.02,0.03)with high conductivity and high optical transparency via a low-cost sol-gel spin coating *** Sn_(0.98)ta_(0.02)o_(2)film achieves the highest electrical conductivity of 855 S cm-1with a carrier concentration of2.3×10^(20)cm^(-3)and high mobility of 23 cm^(2)V^(-1)s^(-1).the films exhibit a very high optical transparency of 89.5%in the visible light ***-resolution X-ray photoemission spectroscopy and optical spectroscopy were combined to gain insights into the electronic structure of the Sn_(1-x)ta_(x)o_(2)*** optical bandgaps of the films are increased from 3.96 eV for the undoped Sno_(2)to 4.24 eV for the Sn_(0.98)ta_(0.02)o_(2)film due to the occupation of the bottom of conduction band by free electrons,i.e.,the Burstein-Moss ***,a bandgap shrinkage is also directly observed due to the bandgap renormalization arising from many-body *** double guarantee of transparency and conductivity in Sn_(1-x)ta_(x)o_(2)films and the low-cost growth method provide a new platform for optoelectronic and solar cell applications.

关键词： transparent conductive oxide sol-gel spin coating ta-doped Sno_(2) electronic structure

Glycerophospholipids pathways and chromosomal instability in gastric cancer: Global lipidomics analysis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal oncology 2019年第3期11卷 181-194页

作者： Cheng-Yu Hung ta-Sen Yeh Cheng-Kun tsai ren-Chin Wu Ying-Chieh lai Meng-Han Chiang Kuan-Ying lu Chia-Ni lin Mei-ling Cheng Gigin lin Molecular Medicine research Center Chang Gung University Clinical Metabolomics Core lab Chang Gung Memorial Hospital at Linkou and Chang Gung University Department of Medical Imaging and Intervention Imaging Core Lab Institute for Radiological Research Chang Gung Memorial Hospital at Linkou and Chang Gung University Department of Surgery Chang Gung Memorial Hospital at Linkou and Chang Gung University Department of Pathology Chang Gung Memorial Hospital at Linkou and Chang Gung University Department of laboratory Medicine Chang Gung Memorial Hospital at Linkou and Chang Gung University Department of Biomedical Science College of Medicine Chang Gung University

BACKGroUND Based on the breakthrough of genomics analysis, the Cancer Genome Atlas research Group recently proposed an integrative genomic analysis, dividing gastric cancer(GC) into four subtypes, characterized by the chromosomal instability(CIN) status. However, the CIN status of GC is still vaguely characterized and lacking the valuable easy-to-use CIN markers to diagnosis in molecular and histological *** to explore the associations of CIN with downstream lipidomics *** We collected cancerous and noncancerous tissue samples from 18 patients with GC; the samples were divided into CIN and non-CIN types based on the system of the Cancer Genome Atlas research Group and 409 sequenced oncogenes and tumor suppressor genes. We identified the lipidomics profiles of the GC samples and samples of their adjacent noncancerous tissues by using liquid chromatography–mass spectrometry. Furthermore, we selected leading metabolites based on variable importance in projection scores of > 1.0 and P twelve men and six women participated in this study; the participants had a median age of 67.5 years(range, 52–87 years) and were divided into CIN(n = 9)and non-CIN(n = 9) groups. the GC samples exhibited distinct profiles of lysophosphocholine, phosphocholine, phosphatidylethanolamine,phosphatidylinositol, phosphoserine, sphingomyelin, ceramide, and triglycerides compared with their adjacent noncancerous tissues. the glycerophospholipid levels(phosphocholine, phosphatidylethanolamine, and phosphatidylinositol)were 1.4-to 2.3-times higher in the CIN group compared with the non-CIN group(P lterations in the glycerolipid and glycerophospholipid pathways indicated progression of GC toward *** the lipidomics profiles of GC samples were distinct from those of their adjacent noncancerous tissues. CIN status of GC is primarily associated with downstream lipidomics in the glycerophospholipid pathway.

关键词： Chromosomal instability Gastric cancer Glycerophospholipids Metabolomics lipidomics profile

Metabolomic alterations and chromosomal instability status in gastric cancer

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 2018年第33期24卷 3760-3769页

作者： Cheng-Kun tsai ta-Sen Yeh ren-Chin Wu Ying-Chieh lai Meng-Han Chiang Kuan-Ying lu Cheng-Yu Hung Hung-Yao Ho Mei-ling Cheng Gigin lin Clinical Metabolomics Core lab Chang Gung Memorial Hospital at Linkou and Chang Gung UniversityTaoyuan 333Taiwan Department of Medical Imaging and Intervention Imaging Core LabInstitute for Radiological ResearchChang Gung Memorial Hospital at Linkou and Chang Gung UniversityTaoyuan 333Taiwan Chang Gung Memorial Hospital at linkou and Chang Gung University Taoyuan 333Taiwan Department of Pathology Chang Gung Memorial Hospital at Linkou and Chang Gung UniversityTaoyuan 333Taiwan Department of Medical Biotechnology and laboratory Science College of MedicineChang Gung UniversityTaoyuan 333Taiwan Department of Biomedical Science College of MedicineChang Gung UniversityTaoyuan 333Taiwan

AIM to explore the correlation of metabolomics profiles ofgastric cancer(GC) with its chromosomal instability(CIN) *** Nineteen GC patients were classified as CIN and nonCIN type by the Cancer Genome Atlas research Group system, based on 409 oncogenes and tumor suppressor genes sequenced. the aqueous metabolites of the GC tumor and its surrounding adjacent healthy tissues were identified through liquid chromatographymass spectrometry. Groups were compared by defining variable importance in projection score of > 1.2, a fold change value or its reciprocal of > 1.2, and a P value of t *** In total,twelve men and seven women were enrolled, with a median age of 66 years(range, 47-87 years). the numbers of gene alterations in the CIN GC group were significantly higher than those in the non-CIN GC(32-218 vs 2-17; P ompared with the adjacent healthy tissues, GC tumors demonstrated significantly higher aspartic acid, citicoline, glutamic acid, oxidized glutathione, succinyladenosine, and uridine diphosphate-Nacetylglucosamine levels, but significantly lower butyrylcarnitine, glutathione hydroxyhexanoycarnitine, inosinic acid, isovalerylcarnitine, and threonine levels(all P tumors contained significantly higher phosphocholine and uridine 5'-monophosphate levels but significantly lower beta-citryl-l-glutamic acid levels than did non-CIN tumors(all P tumors demonstrated additional altered pathways involving alanine, aspartate, and glutamate metabolism, glyoxylate and dicarboxylate metabolism, histidine metabolism, and phenylalanine, tyrosine, and tryptophan *** Metabolomic profiles of GC tumors and the adjacent healthy tissue are distinct, and the CIN status is associated with downstream metabolic alterations in GC.

关键词： Gastric cancer Metabolomics oncogene Copy-number Chromosomal instability liquid chromatography-mass spectrometry

High-quality chromosome-level genome assembly of tibetan fox(Vulpes ferrilata)

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

Zoological research 2022年第3期43卷 362-366页

作者： tian-Shu lyu Qin-Guo Wei li-Dong Wang Sheng-Yang Zhou lu-Peng Shi Yue-Huan Dong Hua-Shan Dou Wei-lai Sha ta Ga Hong-Hai Zhang School of life Science Qufu Normal UniversityQufuShandong 273165China Hulunbuir Academy of Inland lakes in Northern Cold&Arid Areas Hulun BuirInner Mongolia 021000China Ecological Environment and Natural resources Administration QumarlêbXizang 815500China

DEAr EDItor,Using oxford Nanopore and Hi-C sequencing technology,we successfully assembled a chromosome-level genome of the tibetan fox(Vulpes ferrilata),with a total size of 2.38 Gb and N50 length of 133960477 *** 157 contigs were further assembled into 18 chromosomes with a sequence length of2378.42 Mb,accounting for 99.95%of the total length.

关键词： tibetan lata assembled

超声强化有机酸联合去除制革污泥中典型重金属

在线全文

学校读者我要写书评

暂无评论

环境工程学报 2024年第8期18卷 2289-2299页

作者：李自然吴永贵鲁鸿霈梁婉马幸贵州大学资源与环境工程学院贵州省劣境生态修复技术工程研究中心贵州喀斯特环境生态系统教育部野外科学观测研究站上海国惠环境科技股份有限公司

快速发展的制革业使得制革污泥产量剧增，处置不当则将会导致制革污泥中大量含有重金属和氮磷元素的渗滤液进入周边环境而危害生态环境及人类健康。因此，制革污泥的合理处置问题已成为制约行业发展的严重障碍。在固废处置方法中，化学... 详细信息

快速发展的制革业使得制革污泥产量剧增，处置不当则将会导致制革污泥中大量含有重金属和氮磷元素的渗滤液进入周边环境而危害生态环境及人类健康。因此，制革污泥的合理处置问题已成为制约行业发展的严重障碍。在固废处置方法中，化学淋洗是去除固废中重金属的一种常用方法，但其对制革污泥中多种重金属复合污染的去除效果往往不佳。针对制革污泥中的特征重金属(Cr、Zn、Pb)及主要植物营养物(碱解氮、速效钾、有机质)的种类和含量，使用两类典型有机酸如聚羧酸(柠檬酸)、二羧酸(草酸和酒石酸)作为淋洗剂，并结合超声强化对制革污泥中的多种特征重金属(Cr、Zn和Pb)进行针对性的淋洗，探究化学-物理联合淋洗过程对制革污泥中重金属去除效果的主要影响因素(淋洗剂浓度、pH值、固液比、超声强化)及制革污泥中植物养分的流失情况。实验结果表明：超声强化条件下，不同类型的有机酸对制革污泥中不同种类重金属的去除效果存在显著差异，其中，柠檬酸(CA)对制革污泥中Cr、Zn和Pb的最佳去除率分别为49.11%、63.74%和31.88%，草酸(oA)为76.25%、65.24%和9.98%，酒石酸(ta)为32.79%、67.53%和18.34%。同时，与传统重金属淋洗方法相比，使用超声强化去除制革污泥可显著提高重金属去除效率(提高8.75%～22.67%)和极显著地降低反应平衡时间(从720 min缩短至90 min)。经3种有机酸淋洗后，残余在制革污泥的重金属化学形态仍处于较为稳定的形态(残渣态和氧化态)。傅里叶变换红外光谱分析结果表明，制革污泥中的重金属可通过添加含有羧基和羰基的有机酸以离子交换、螯合和静电吸附等机制从制革污泥中去除。有机酸淋洗后仍保留了制革污泥中绝大部分的植物养分。其中，淋洗后的pH值、碱解氮(AN)和速效钾(AK)含量虽有所降低，但有机质(oM)和速效磷(AP)含量或比例则相对有所增加。实验证实，通过优化的化学-物理联合淋洗可达到重金属去除率高、养分流失率低、不易产生二次污染的目的，相关研究结果可为制革污泥中重金属的高效去除及淋洗后作为植物基质利用提供参考。

关键词：制革污泥重金属植物营养物质超声强化有机酸淋洗

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

ta在铁基合金熔炼中的溶解行为

金属热处理 2024年第6期49卷 211-216页

作者：史显波商宁波白学飞卢伦严伟单以银中国科学院金属研究所辽宁沈阳110016 日钢营口中板有限公司山东营口115005 抚顺特殊钢股份有限公司辽宁抚顺113001

利用真空感应冶炼、SEM和EPMA等方法,对ta在铁基合金熔炼中的溶解行为进行了试验研究。结果表明,高熔点纯金属ta可以在铁基合金熔炼中溶解,适量ta可以完全溶解于铁基金属中。真空感应冶炼含ta铁基合金时,降低氧含量和增加精炼时间可以减... 详细信息

利用真空感应冶炼、SEM和EPMA等方法,对ta在铁基合金熔炼中的溶解行为进行了试验研究。结果表明,高熔点纯金属ta可以在铁基合金熔炼中溶解,适量ta可以完全溶解于铁基金属中。真空感应冶炼含ta铁基合金时,降低氧含量和增加精炼时间可以减少ta的氧化烧损,促进ta在铁基合金熔炼中的溶解。第3组元C、Cr可减少ta的氧化烧损,但Cr的加入并不促进ta的溶解。

关键词： ta 铁基合金溶解真空感应熔炼

Segmental Kinematic Coupling of the Human Spinal Column during locomotion

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2008年第4期5卷 328-334页

作者： Guo-ru Zhao lei ren lu-quan ren John r. Hutchinson li-mei tian Jian S. Dai Key laboratory for terrain-Machine Bionics Engineering （Ministry of Education China） Jilin University Changchun 130022 P. R. China School of Physical Science and Engineering King＇s College of London University of London London WC2R 2LS UK Structure and Motion laboratory Department of Veterinary Basic Sciences The Royal Veterinary College University of London Hertfordshire AL9 7TA UK

As one of the most important daily motor activities, human locomotion has been investigated intensively in recent decades. the locomotor functions and mechanics of human lower limbs have become relatively well understood. However, so far our understanding of the motions and functional contributions of the human spine during locomotion is still very poor and simultaneous in-vivo limb and spinal column motion data are scarce. the objective of this study is to investigate the delicate in-vivo kinematic coupling between different functional regions of the human spinal column during locomotion as a stepping stone to explore the locomotor function of the human spine complex. A novel infrared reflective marker cluster system was constrncted using stereophotogrammetry techniques to record the 3D in-vivo geometric shape of the spinal column and the segmental position and orientation of each functional spinal region simultaneously. Gait measurements of normal walking were conducted. the preliminary results show that the spinal column shape changes periodically in the frontal plane during locomotion. the segmental motions of different spinal functional regions appear to be strongly coupled, indicating some synergistic strategy may be employed by the human spinal column to facilitate locomotion. In contrast to traditional medical imaging-based methods, the proposed technique can be used to investigate the dynamic characteristics of the spinal column, hence providing more insight into the functional biomechanics of the human spine.

关键词： biomechanics spinal cofumn human locomotion in-vivo segmental kinematics motion analysis stereophotogrammetry kinematic coupling

refinement of Enhanced Speech Using Hybrid-Median Filter and Harmonic regeneration Approach

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and technology 2014年第3期12卷 293-298页

作者： Ching-ta lu Jun-Hong Shen Kun-Fu tseng Chih-tsung Chen Department of Information Communication Asia University Department of Biomedical Imaging and radiological Science China Medical University Department of Multimedia and Game Science Asia-Pacific Institute of Creativity

this study proposes a post-processor to improve the harmonic structure of a vowel in an enhanced speech, enabling the speech quality to be improved. Initially, a speech enhancement algorithm is employed to reduce the background noise for a noisy speech. Hence the enhanced speech is post-processed by a hybrid-median filter to reduce the musical effect of residual noise. Since the harmonic spectra are impacted by background noise and a speech enhancement process, the quality of a vowel is deteriorated. A harmonic regenerated method is developed to improve the quality of post-processed speech. Experimental results show that the proposed method can improve the quality of post-processed speech by adequately regenerating harmonic spectra.

关键词： Harmonic regeneration hybrid-median filter noise reduction post-processing speech enhancement