检索结果-南通市图书馆

destruction of PCDD/Fs by gliding arc discharges

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第11期19卷 1404-1408页

作者： YAN Jian-hua PENG Zheng LU Sheng-yong DU Chang-ming LI Xiao-dong CHEN Tong NI Ming-jiang CEN Ke-fa State Key Laboratory of Clean Energy Utilization Institute for Thermal Power Engineering Zhejiang University Hangzhou 310027 China Environmental Science and Engineering Sun Yat-Sen University Guangzhou 510275 China

PCDD/Fs have been become a serious issue because of their toxicological effects and associated adverse health implications. In this study, the gliding arc plasma was tested for treatment of polychlorinated dibenzo-p-dioxins （PCDDs） and polychlorinated dibenzofurans （PCDFs）, which was synthesized from pentachlorophenol in atmospheric condition at 350℃ with or without the catalysis of CuCl2. From the experiment, we found that the destruction efficiency of PCDD/F homologues after gliding was discharge ranged from 25% to 79%. This result demonstrates that gliding arc plasma is an effective technology to decompose PCDDs/Fs in flue gas. A plausible degradation mechanism for PCDD/Fs by gliding arc was discussed. Finally, a multistage reactor structure of gliding arc was proposed to upgrade removal efficiency for PCDD/Fs.

关键词： PCDD/Fs destruction gliding arc discharges, multistage reactor

The subduction of the west Pacific plate and the destruction of the North China Craton

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2019年第9期62卷 1340-1350页

作者： Rixiang ZHU Yigang XU Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China School of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing 100049 China

While a general concensus has recently been reached as to the causal relationship between the subduction of the west Pacific plate and the destruction of the North China Craton, a number of important questions remain to answer, including the initial subduction of west Pacific plate beneath the eastern Asian continent, the position of west Pacific subduction zone during the peak period of decratonization(i.e., Early Cretaceous), the formation age of the big mantle wedge under eastern Asia, and the fate of the subducted Pacific slab. Integration of available data suggests that the subduction of the western Pacific plate was initiated as early as Early Jurrasic and the subduction zone was situated to 2,200 km west of the present-day trench in the Early Creataceous, as a result of eastward migration of the Asian continent over a distance of ca. 900 km since the Early *** retreat of the subducting west Pacific plate started ~145 Ma ago, corresponding to the initial formation of the big mantle wedge system in the Early Cretaceous. The subduction of the Pacific slab excerted severe influence on the North China Craton most likely through material and energy echange between the big mantle wedge and overlying cratonic lithosphere. The evolution history of the west Pacific plate was reconstructed based on tectonic events. This allows to propose that the causes of phases A and B for the Yanshanian orogeny were respectively related to rapid low-angle subduction and to lowering subduction angle of the west Pacific plate. At ca. 130–120 Ma, the subduction of the west Pacific plate was characterized by increasing subducting angle, slab rollback and rapid trench retreat, leading to the final stagnation of the subducting slab within the mantle transition zone. This process may have significantly affected the physical property and viscosity of the mantle wedge above the stagnant slab, resulting in non-steady mantle flows. The ingression of slab-released melts/fluids would s

关键词： Early Creatceous Cratonic destruction Subduction of west Pacific plate

Antitumor effect of VEGFR2-targeted microbubble destruction with gemcitabine using an endoscopic ultrasound probe:In vivo mouse pancreatic ductal adenocarcinoma model

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2020年第5期19卷 478-485页

作者： Nana Shimamoto Masaki Ito Masafumi Chiba Sadamu Honma Hiroo Imazu Kazuki Sumiyama Department of Endoscopy The Jikei University School of Medicine3-25-8 Nishi ShinbashiMinato-kuTokyo 105-8461Japan Division of Oncology Research Center for Medical Science3-25-8 Nishi ShinbashiMinato-kuTokyo 105-8461Japan Division of Gastroenterology and Hepatology Department of MedicineNihon University School of Medicine30-1 Oyaguchikami-choItabashi-kuTokyo 173-8610Japan

Background:Ultrasound-targeted microbubble destruction(UTMD)induces cellular inflow of drugs at low intensity,while high intensity eradicates tumor *** vascular endothelial growth factor receptor 2(VEGFR2)is highly expressed in pancreatic ductal adenocarcinoma(PDAC),VEGFR2-targeted microbubble(MB)might additionally increase the tissue specificity of drugs and thus improve antitumor *** addition,fixing the dual pulse intensity could maximize MB *** study evaluated the one-off(experiment 1)and cumulative(experiment 2)treatment effect of UTMD by regulating the dual pulse output applied to PDAC using VEGFR2-targeted ***:C57BL/6 mice inoculated with Pan-02 cells were allocated to five groups:VEGFR2-targeted MB+gemcitabine(GEM),VEGFR2-targeted MB,non-targeted MB+GEM,GEM,and control *** injection of GEM or GEM and either VEGFR2-targeted or non-targeted MB,UTMD was applied for several minutes at low intensity followed by high intensity *** experiment 1,mice were treated by the protocol described above and then euthanized immediately or at the tumor diameter doubling time(TDT).In experiment 2,the same protocol was repeated weekly and mice were euthanized at TDT regardless of protocol *** analysis by CD31 and VEGFR2 staining provided microvascular density(MVD)and VEGFR2 expression along vessels(VEGFR2v)or intra/peripheral cells(VEGFR2c).Results:In experiment 1,TDT was significantly longer in the VEGFR2-targeted MB+GEM group compared to the non-targeted MB+GEM,GEM,and control groups,while the VEGFR2-targeted MB group showed no statistical *** and VEGFR2v in the immediate euthanasia was significantly lower in the VEGFR2-targeted MB+GEM and VEGFR2-targeted MB groups than other *** experiment 2,the VEGFR2-targeted MB+GEM group produced significantly longer TDT than the GEM or control groups,whereas the VEGFR2-targeted MB group showed no significant *** revealed sign

关键词： Ultrasound-targeted microbubble destruction VEGFR2-targeted microbubble Pancreatic ductal adenocarcinoma Gemcitabine

One-Pot Solvothermal Synthesis of TiO2 Nanobelt/Graphene Composites for Selective Renal Cancer Cells destruction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2016年第1期34卷 53-58页

作者： Jinsheng Cheng Weihong Wan Wenjuan Zhu Institute of Hakka Health Care School of Medicine Jiaying University Meizhou Guangdong 514031 China Guangdong Medical University Dongguan 523808 China

Little attention has been paid to synthesis and application of TiO2 nanobelt/graphene composites （TiO2/GR）. In this work, a facile one-pot solvothermal approach to synthesize TiO2/GR was developed. In such processes, the reduction of graphene oxide （GO） nanosheets was accompanied by generation of TiO2/GR in one-step. In vitro experiments revealed that the renal cancer （RENCA） cell viability decreased sharply to 4.72% in the presence of the resulting composites in the near infrared light （NIR） window.

关键词： graphene titanium dioxide renal cancer destruction

Geochronology, Geochemistry and Hf Isotope of the Late Mesozoic Granitoids from the Lushi Polymetal Mineralization Area: Implication for the destruction of Southern North China Craton

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 Earth Science 2020年第2期31卷 313-329页

作者： Yuanyuan Zhai Shuai Gao Qingdong Zeng Shaoxiong Chu Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institution of Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences、Beijing 100049 China Linyi Natural Resources and Planning Bureau Linyi 276000China

The North China Craton(NCC)is the best example of an Archean craton that has lost its stability in the Late *** the cratonic destruction is generally considered to have occurred in the Eastern Block and reached a peak in the Early Cretaceous,the exact areal extent of cratonic destruction is debated,especially the southern and northern margin of the *** we report geochronology,geochemical and Hf isotopic data of the Late Mesozoic granitoids from Lushi polymetal mineralization area(LPMA)in the southern margin of *** results provide new insights into the destruction in the southern margin of the NCC during the Late *** U-Pb dating indicates that eight granitoids intruded in the Late Jurassic to Early Cretaceous(136.8–154.1 Ma),*** signatures define these granitoids being A-type or I-type granite that formed in an extension *** addition,Hf isotopic compositions of zircons from these granitoids vary in a relatively large range,withεHf(t)values and TDM2 ages ranginge from-26.1 to+15.2 and 215 to 2849 Ma,*** parental magmas were likely derived from diverse sources,including materials of the partial melting of ancient lower crust and mantle-derived mafic magmas in various *** with previous studies on the contemporaneous magma-tectonic activities in circum of NCC,we suggest that the rim of NCC was already unstabilized from the Late Jurassic in the *** subduction of the Paleo-Pacific Plate was the main trigger to the destruction of the southern margin of NCC,which was responsible for the lithospheric extension and thinning,extensive magmatism and mineralization.

关键词： Late Mesozoic granitoids geochronology geochemistry Hf isotopic composition southern margin of NCC cratonic destruction

The neutrophil–osteogenic cell axis promotes bone destruction in periodontitis

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2024年第1期16卷 154-162页

作者： Yutaro Ando Masayuki Tsukasaki Nam Cong-Nhat Huynh Shizao Zang Minglu Yan Ryunosuke Muro Kazutaka Nakamura Masatsugu Komagamine Noriko Komatsu Kazuo Okamoto Kenta Nakano Tadashi Okamura Akira Yamaguchi Kazuyuki Ishihara Hiroshi Takayanagi Department of Immunology Graduate School of Medicine and Faculty of MedicineThe University of Tokyo7-3-1HongoBunkyo-kuTokyoJapan Department of Microbiology Tokyo Dental College2-1-14 Kanda-Misaki-choChiyoda-kuTokyoJapan Oral Health Science Center Tokyo Dental College2-9-18Kanda-Misaki-choChiyodakuTokyoJapan Department of Osteoimmunology Graduate School of Medicine and Faculty of MedicineThe University of Tokyo7-3-1HongoBunkyo-kuTokyoJapan Unit of Prosthodontics Laboratory of Oral-Maxillofacial Biology Faculty of Odonto-StomatologyUniversity of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityVietnam Department of Oral and Maxillofacial Surgery Department of Sensory and Motor System MedicineGraduate School of MedicineThe University of TokyoTokyoJapan Division of Rheumatology Department of Internal MedicineKeio University School of MedicineTokyoJapan Department of Laboratory Animal Medicine Research InstituteNational Center for Global Health and MedicineTokyoJapan

The immune-stromal cell interactions play a key role in health and diseases. In periodontitis, the most prevalent infectious disease in humans, immune cells accumulate in the oral mucosa and promote bone destruction by inducing receptor activator of nuclear factor-κB ligand (RANKL) expression in osteogenic cells such as osteoblasts and periodontal ligament cells. However, the detailed mechanism underlying immune–bone cell interactions in periodontitis is not fully understood. Here, we performed single-cell RNAsequencing analysis on mouse periodontal lesions and showed that neutrophil–osteogenic cell crosstalk is involved in periodontitis-induced bone loss. The periodontal lesions displayed marked infiltration of neutrophils, and in silico analyses suggested that the neutrophils interacted with osteogenic cells through cytokine production. Among the cytokines expressed in the periodontal neutrophils, oncostatin M (OSM) potently induced RANKL expression in the primary osteoblasts, and deletion of the OSM receptor in osteogenic cells significantly ameliorated periodontitis-induced bone loss. Epigenomic data analyses identified the OSM-regulated RANKL enhancer region in osteogenic cells, and mice lacking this enhancer showed decreased periodontal bone loss while maintaining physiological bone metabolism. These findings shed light on the role of neutrophils in bone regulation during bacterial infection, highlighting the novel mechanism underlying osteoimmune crosstalk.

关键词： period neutrophil destruction

Eclogite-melt/peridotite reaction: Experimental constrains on the destruction mechanism of the North China Craton

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2010年第6期53卷 797-809页

作者： WANG Chao JIN ZhenMin GAO Shan ZHANG JunFeng ZHENG Shu State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

To study the mechanism of melt-peridotite reaction pertinent to the destruction of the North China Craton (NCC) lithosphere, a series of experiments were performed at a pressure of 2.0 GPa and temperatures from 1250 to 1400°C using Bixiling eclogite and Damaping peridotite as starting materials. The experimental results show that the reaction between eclogite melt and peridotite causes dissolution of olivine and orthopyroxene and precipitation of clinopyroxene in the melt. The experimental run products, characterized by a lherzolite/pyroxenite/garnet-pyroxenite sequence, are consistent with the mantle xenoliths in the Neogene Hannuoba basalt of the NCC found by Liu et al. (2005). It suggests that the mafic lower continental crust was probably recycled into the mantle during the Mesozoic Era. In the experiments conducted at 1300 and 1350°C, the resulting melts have a high Mg# andesite signature, indicating that the melt-peridotite reaction may have played a major role in the generation of high Mg# andesite. Our experimental results support the hypothesis that melts derived from foundered eclogite in the asthenosphere will consume the lithospheric peridotites. Therefore, melt-peridotite reaction is an important mechanism for the destruction/thinning of the lithosphere.

关键词： eclogite peridotite melt/peridotite reaction high Mg# andesite delamination destruction of lithosphere

destruction phenomena in ferroactive materials

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2020年第4期10卷 22-30页

作者： Sidek Khasbulatov Aleksander Cherpakov Ivan Parinov Konstantin Andryushin Lidiya Shilkina Vladimir Aleshin Inna Andryushina Balabek Mardaliev David Gordienko Iliya Verbenko Larisa Reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don 344090 Stachki str.194Russia Faculty of Physics and Information-Communication Technologies Grozny 364024 Sultan Dudaev Boulevard17A Russia Institute of Mathematics Mechanics and Computer Science named after of I.I.Vorovich Southern Federal University 344090 Rostov-on-Don Stachki str.200/1Russia Faculty of Physics Southern Federal University 344090 Rostov-on-DonZorge 5Russia

The results of a comprehensive study of the crystal structure,grain structure,and strength properties of ceramic bismuth ferrite with rare earth elements(REE)obtained by two-stage solid-phase synthesis followed by sintering using conventional ceramic technology are *** reasons for the formation of low mechanical strength and the development of destruction phenomena in solid solutions with small REE(R<0:94Å)are considered:Tb,Dy,Ho,Er,Tm,Yb,*** causes of the observed phenomena associated with the composite-like structure of the studied media and,as a consequence,the occurrence of local stresses of structural elements that provoke crack formation are established.A source of the latter are also the structural features of the grain *** conclusion is made about the appropriateness of taking into account the information obtained when developing devices based on BiFeO_(3)/REE multiferroics.

关键词： Structure microstructure destruction multiferroics

Quantitative relationship between soil erosion by wind and surface structure destruction

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 1995年第6期40卷 492-496页

作者：董治宝陈渭南董光荣杨佐涛李振山 Institute of Desert Research Chinese Academy of Sciences Lanzhou 730000 China

A series of research work concerning the influences of various natural factors on wind erosion was made by Chepil, W. S. et al. in the 1950s and 1960s. Consequently, a wind erosion equation was established. In China, the first wind tunnel experiment on wind erosion factors was done by Dong Guangrong et al. As a result, qualitative solution to the influences of soil surface structure destruction mainly caused by furrowing and

关键词： surface destruction ratio wind erosion rate quantitative relationship.