检索结果-南通市图书馆

Energy partition in laser-induced cavitation bubbles near the rigid wall with a gas-containing hole

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2024年第3期36卷 435-443页

作者： Dong-qiao He Hai-gang Wen Si-yuan Geng Chen-xi yang Qiang Zhong Zhi-feng Yao College of Water Resources and Civil Engineering China Agricultural UniversityBeijing100083China Powerchina Beijing Engineering Corporation Limited Beijing100024China State Key Laboratory of Efficient Utilization of Agricultural Water Resources Beijing100083China Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System China Agricultural UniversityBeijing100083China

To investigate the energy partition in laser-induced cavitation bubbles near the rigid wall with a gas-containing hole,we utilized a nanosecond resolution photography system based on a Q-switched Nd:YAG laser and conventional industrial camera to carefully observe the transient process of bubble collapse near the rigid wall with a gas-containing *** analyzed the generation of collapse microjets and the emission of collapse shock *** found that the cavitation bubble near the rigid wall with a gas-containing hole collapsed at different times and space,and produced various types of shock *** on the far field pressure information of the shock waves measured by hydrophone,the energy of the shock waves generated by the bubble collapse near the rigid wall with a gas-containing hole is calculated for the first *** results show that the ratio of collapse shock wave energy to bubble energy is approximately between 0.7 and 0.8.

关键词： Energy partition bubble collapse laser-induced shock wave gas-containing hole

Geometric properties of the first singlet S-wave excited state of two-electron atoms near the critical nuclear charge

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 Physics B 2024年第10期33卷 213-219页

作者： Tong Chen Sanjiang yang Wanping Zhou Xuesong Mei d Haoxue Qiao School of Physics and Technology Wuhan UniversityWuhan 430072China College of Physics and Electronic Science Hubei Normal UniversityHuangshi 435002China School of Physics and Telecommunications Huanggang Normal UniversityHuanggang 438000China Wuhan Maritime Communication Research Institute Wuhan 430072China

The geometric structure parameters and radial density distribution of 1s2s1S excited state of the two-electron atomic system near the critical nuclear charge Z_(c)were calculated in detail under tripled Hylleraas basis *** to the localized behavior observed in the ground and the doubly excited 2p^(23)Pe states,for this state our results identify that while the behavior of the inner electron increasingly resembles that of a hydrogen-like atomic system,the outer electron in the excited state exhibits diffused hydrogen-like character and becomes perpendicular to the inner electron as nuclear charge Z approaches Z_(c).This study provides insights into the electronic structure and stability of the two-electron system in the vicinity of the critical nuclear charge.

关键词： critical nuclear charge two-electron atomic system geometric structure density distribution

TL1A Promotes Fibrogenesis in Colonic Fibroblasts via the TGF-β1/Smad3 Signaling Pathway

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2024年第3期44卷 519-528页

作者： Jia SONG Dong-lei SUN Chen-yang LI Yu-xin LUO Qian LIU Yue YAO Hong ZHANG Ting-ting yang Mei SONG Xin-li BAI Xiao-lan ZHANG Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesShijiazhuang050000China Department of Pediatrics The Second Hospital of Hebei Medical UniversityShijiazhuang050000China

Objective Intestinal fibrosis is a refractory complication of inflammatory bowel disease(IBD).Tumor necrosis factor ligand-related molecule-1A(TL1A)is important for IBD-related intestinal fibrosis in a dextran sodium sulfate(DSS)-induced experimental colitis *** study aimed to explore the effects of TL1A on human colonic *** A trinitrobenzene sulfonic acid(TNBS)-induced experimental colitis model of LCK-CD2-TL1A-GFP transgenic(Tg)or wild-type(WT)mice was established to determine the effect and mechanism of TL1A on intestinal *** human colonic fibroblast CCD-18Co cell line was treated concurrently with TL1A and human peripheral blood mononuclear cell(PBMC)*** proliferation and activation of CCD-18Co cells were detected by BrdU assays,flow cytometry,immunocytochemistry and Western *** metabolism was tested by Western blotting and real-time quantitative polymerase chain reaction(RT-qPCR).Results The level of collagen metabolism in the TNBS+ethyl alcohol(EtOH)/Tg group was greater than that in the TNBS+EtOH/WT *** growth factor-β1(TGF-β1)and p-Smad3 in the TNBS+EtOH/Tg group were upregulated as compared with those in the TNBS+EtOH/WT *** proliferation of CCD-18Co cells was promoted by the addition of human PBMC supernatant supplemented with 20 ng/mL TL1A,and the addition of human PBMC supernatant and TL1A increased CCD-18Co proliferation by 24.4%at 24 ***1A promoted cell activation and increased the levels of COL1A2,COL3A1,and TIMP-1 in CCD-18Co *** of CCD-18Co cells with TL1A increased the expression of TGF-β1 and *** TL1A promotes TGF-β1-mediated intestinal fibroblast activation,proliferation,and collagen deposition and is likely related to an increase in the TGF-β1/Smad3 signaling pathway.

关键词： tumor necrosis factor ligand-related molecule-1A fibrosis inflammatory bowel disease myofibroblasts transforming growth factor-β1

High quality repair of osteochondral defects in rats using the extracellular matrix of antler stem 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 Stem Cells 2024年第2期16卷 176-190页

作者： Yu-Su Wang Wen-Hui Chu Jing-Jie Zhai Wen-ying Wang Zhong-Mei He Quan-Min Zhao Chun-Yi Li Institute of Antler Science and Product Technology Changchun Sci-Tech UniversityChangchun 130000Jilin ProvinceChina College of chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118Jilin ProvinceChina School of Life Science Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina Department of Oral Implantology Hospital of StomatologyJilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Cartilage defects are some of the most common causes of *** lesions caused by inflammation,trauma or degenerative disease normally result in osteochondral *** studies have shown that decellularized extracellular matrix(ECM)derived from autologous,allogenic,or xenogeneic mesenchymal stromal cells(MSCs)can effectively restore osteochondral *** To determine whether the decellularized ECM of antler reserve mesenchymal cells(RMCs),a xenogeneic material from antler stem cells,is superior to the currently available treatments for osteochondral *** We isolated the RMCs from a 60-d-old sika deer antler and cultured them in vitro to 70%confluence;50 mg/mL L-ascorbic acid was then added to the medium to stimulate ECM *** sheets of adipocyte-derived MSCs(aMSCs)and antlerogenic periosteal cells(another type of antler stem cells)were used as the *** weeks after ascorbic acid stimulation,the ECM sheets were harvested and applied to the osteochondral defects in rat knee *** The defects were successfully repaired by applying the *** highest quality of repair was achieved in the RMC-ECM group both in vitro(including cell attachment and proliferation),and in vivo(including the simultaneous regeneration of well-vascularized subchondral bone and avascular articular hyaline cartilage integrated with surrounding native tissues).Notably,the antler-stem-cell-derived ECM(xenogeneic)performed better than the aMSC-ECM(allogenic),while the ECM of the active antler stem cells was superior to that of the quiescent antler stem *** Decellularized xenogeneic ECM derived from the antler stem cell,particularly the active form(RMC-ECM),can achieve high quality repair/reconstruction of osteochondral defects,suggesting that selection of decellularized ECM for such repair should be focused more on bioactivity rather than kinship.

关键词： Osteochondral defect repair Mesenchymal stem cells Extracellular matrix Decellularization Antler stem cells Reserve mesenchymal cells Xenogeneic

Effectiveness of urban distributed runoff model for discharge and water depth calculation in urban drainage pipe networks

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 Hydrodynamics 2024年第3期36卷 582-591页

作者： yang Zhou Yi-ling Leng Peng-yu Wang Shang-hong Zhang Yu-long Zhu Yu-jun Yi School of Water Resources and Hydropower Engineering North China Electric Power UniversityBeijing102206China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing100875China

Effective urban land-use re-planning and the strategic arrangement of drainage pipe networks can significantly enhance urban flood defense *** at reducing the potential risks of urban flooding,this paper presents a straightforward and efficient approach to an urban distributed runoff model(UDRM).The model is developed to quantify the discharge and water depth within urban drainage pipe networks under varying rainfall intensities and land-use *** Nash efficiency coefficient of UDRM exceeds 0.9,which indicates its high computational efficiency and potential benefit in predicting urban *** prediction of drainage conditions under both current and re-planned land-use types is achieved by adopting different flood recurrence *** findings reveal that the re-planned land-use strategies could effectively diminish flood risk upstream of the drainage pipe network across 20-year and 50-year flood recurrence ***,in the case of extreme rainfall events(a 100-year flood recurrence),the re-planned land-use approach fell short of fulfilling the requirements necessary for flood disaster *** these instances,the adoption of larger-diameter drainage pipes becomes an essential requisite to satisfy drainage ***,the proposed UDRM effectively combines land-use information with pipeline data to give practical suggestions for pipeline modification and land-use optimization to combat urban ***,this methodology warrants further promotion in the field of urban re-planning.

关键词： Stormwater runoff water depth urban distributed runoff model urban drainage pipe networks urban land-use re-planning

LncRNA LUCAT1调节miR-493-5p对卵巢癌细胞增殖、凋亡、迁移和侵袭的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国老年学杂志 2024年第11期44卷 2666-2672页

作者：许继群郭颖吕向阳山东中医药大学附属医院生殖与遗传科山东济南250011

目的探讨长链非编码(Lnc)RNA LUCAT1通过调节miR-493-5p对卵巢癌细胞增殖、凋亡、迁移、侵袭的影响。方法通过qRT-聚合酶链反应(PCR)检测73例卵巢癌患者癌组织与癌旁组织、卵巢癌细胞系(SK-OV-3、OVCAR-3、A2780、HO8910)与人正常卵巢... 详细信息

目的探讨长链非编码(Lnc)RNA LUCAT1通过调节miR-493-5p对卵巢癌细胞增殖、凋亡、迁移、侵袭的影响。方法通过qRT-聚合酶链反应(PCR)检测73例卵巢癌患者癌组织与癌旁组织、卵巢癌细胞系(SK-OV-3、OVCAR-3、A2780、HO8910)与人正常卵巢上皮细胞系(IOSE80)中LncRNA LUCAT1与miR-493-5p表达水平;常规培养SK-OV-3细胞并将其分为对照组、si-NC组、si-LUCAT1组、mimics-NC组、miR-493-5p mimics组、si-LUCAT1+inhibitor-NC组、si-LUCAT1+miR-493-5p inhibitor组,CCK-8法检测细胞增殖;流式细胞术检测SK-OV-3细胞凋亡;Transwell试验检测SK-OV-3细胞侵袭与迁移能力;Western印迹试验检测ki-67、B细胞淋巴瘤(Bcl)-2、Bcl-2相关X蛋白(Bax)、基质金属蛋白酶(MMP)-2蛋白表达;双荧光素酶报告基因验证LncRNA LUCAT1与miR-493-5p关系。结果与癌旁组织、IOSE80细胞系相比,卵巢癌组织、卵巢癌细胞系(SK-OV-3、OVCAR-3、A2780、HO8910)中LncRNA LUCAT1表达水平明显升高,miR-493-5p表达水平明显降低(P<0.05),其中SK-OV-3细胞中LncRNA LUCAT1表达水平最高,miR-493-5p表达水平最低;与对照组、si-NC组比较,si-LUCAT1组细胞增殖率、迁移、侵袭细胞数、ki-67、Bcl-2、MMP-2蛋白表达明显降低,Bax蛋白、凋亡率明显升高(P<0.05);与si-LUCAT1、si-LUCAT1+inhibitor-NC组比较,si-LUCAT1+miR-493-5p inhibitor组细胞增殖率、迁移、侵袭细胞数、ki-67、Bcl-2、MMP-2蛋白表达明显升高,miR-493-5p、Bax蛋白表达、凋亡率明显降低(P<0.05)。结论LUCAT1沉默可能通过促进miR-493-5p表达,抑制SK-OV-3细胞增殖、侵袭、迁移,并促进SK-OV-3细胞凋亡。

关键词：卵巢癌肺癌相关转录本1 miR-493-5p 增殖凋亡侵袭迁移

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

聚乙烯亚胺的抑膨促渗机理

Journal of Central South University 2024年第2期31卷 317-329页

作者：阳慧芳沙傲阳何正艳吴明瞿军吴晨捷徐志高池汝安 Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission College of Resources and Environmental ScienceSouth-Central Minzu UniversityWuhan 430074China Key Laboratory for Green Chemical Process of Ministry of Education School of Resources&Safety EngineeringWuhan Institute of TechnologyWuhan 430073China

为解决风化壳淋积型稀土矿(WCE-DREO)原地浸出过程中出现的滑坡和浸出速度慢等问题,研究了聚乙烯亚胺(PEI)对蒙脱石(MMT)和风化壳淋积型稀土矿的抑膨性能及作用机理。随着聚乙烯亚胺浓度的增加,聚乙烯亚胺对蒙脱石和风化壳淋积型稀土矿... 详细信息

为解决风化壳淋积型稀土矿(WCE-DREO)原地浸出过程中出现的滑坡和浸出速度慢等问题,研究了聚乙烯亚胺(PEI)对蒙脱石(MMT)和风化壳淋积型稀土矿的抑膨性能及作用机理。随着聚乙烯亚胺浓度的增加,聚乙烯亚胺对蒙脱石和风化壳淋积型稀土矿的抑膨效果逐渐增强。由0.4%聚乙烯亚胺和2%硫酸铵组成的复合浸出剂与单独使用2%硫酸铵相比,稀土的浸出效率从93.94%提高到95.24%,浸出时间缩短了约33%。聚乙烯亚胺可通过水解产生大量-NH_(3)^(+),从而中和黏土矿物夹层和表面的负电荷,减少静电排斥,削弱黏土矿物的水化和膨胀。PEI可在黏土颗粒上形成一层聚合物膜,改变颗粒表面的亲水性,减少水的侵入。小颗粒在长链PEI的包裹和桥联作用下发生团聚,从而增大了颗粒尺寸,有利于浸出剂的渗入。PEI骨架还能嵌入黏土夹层并挤出夹层水,从而抑制黏土矿物的膨胀。

关键词：聚乙烯亚胺蒙脱石风化壳淋积型稀土矿抑膨促渗

Graphene photodetectors integrated with silicon and perovskite quantum dots

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第3期10卷 21-33页

作者： Kashif Abbas Peirui Ji Naveed Ullah Shareen Shafique Ze Zhang Muhammad Faizan Ameer Shenghan Qin Shuming yang State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Microelectronic Science and Engineering Laboratory of Clean Energy Storage and ConversionSchool of Physical Science and TechnologyNingbo Collaborative Innovation Center of Nonlinear Calamity System of Ocean and AtmosphereNingbo UniversityNingbo 315211China

Photodetectors(PDs)play a crucial role in imaging,sensing,communication systems,***(Gr),a leading two-dimensional material,has demonstrated significant potential for photodetection in recent ***,its relatively weak interaction with light poses challenges for practical *** integration of silicon(Si)and perovskite quantum dots(PQDs)has opened new avenues for Gr in the realm of next-generation *** review provides a comprehensive investigation of Gr/Si Schottky junction PDs and Gr/PQD hybrid PDs as well as their *** operating principles,design,fabrication,optimization strategies,and typical applications of these devices are studied and *** these discussions,we aim to illuminate the current challenges and offer insights into future directions in this rapidly evolving field.

关键词： quantum discussions summarized

Effectiveness of Frequent Viral Load Testing Plus Additional Interventions to Prevent HIV Transmission in Heterosexual,Serodiscordant Couples—Yunnan Province,china,2019-2021

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

china CDC weekly 2024年第27期6卷 658-664,I0001-I0004页

作者： Jing Han Jian Li Yuhua Shi Chunpeng Zang Zhimin yang Yu Han Yanling Ma Qiongli Duan Yuhua Hu Zikuang Bai Cuiyun yang Gabriella Bulloch Yurong Mao Houlin Tang Zunyou Wu Yufen Liu National Center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina Yunnan Provincial Center for Disease Control and Prevention Kunming CityYunnan ProvinceChina Honghe Prefectural Center for Disease Control and Prevention Honghe CityYunnan ProvinceChina Wenshan Prefectural Center for Disease Control and Prevention Wenshan CityYunnan ProvinceChina Zhaotong Prefectural Center for Disease Control and Prevention Zhaotong CityYunnan ProvinceChina Lincang Prefectural Center for Disease Control and Prevention Lincang CityYunnan ProvinceChina Faculty of Medicine Dentistry and Health SciencesUniversity of MelbourneMelbourneVICAustralia

Summary What is already known about this topic?HIV transmission among serodiscordant couples remains a persistent issue in ***,the practice of combining counseling with antiretroviral therapies(ART)to enhance ART adhe... 详细信息

关键词： china ant discord