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Geochronology and geochemistry of gneissic metagranites in eastern Dabie Mountains:Implications for the Neoproterozoic tectono-magmatism along the northeastern margin of the Yangtze Block

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Science China Earth Sciences 2010年第4期53卷 501-517页

作者： Jian Hu JianSheng qiu XiSheng Xu XiaoLei Wang zhen Li Nanjing Univ State Key Lab Mineral Deposits Res Nanjing 210093 Peoples R China

The gneissic metagranites with Neoproterozoic protolith ages are widely exposed along the eastern margin of the Dabie ultra-high-pressure(UHP) metamorphic *** this paper,five representative plutons,including Huangzhen,Daba,Shima,Shuanghe,and Sanzusi,were selected for a detailed chronological and geochemical study aiming to identify the nature of the protoliths and to reveal their implications for the Neoproterozoic tectono-magmatic evolution along the northeastern margin of the Yangtze *** gneissic metagranites consist mainly of quartz,albite(oligoclase) and K-feldspar,and minor amphibole and biotite,as well as some metamorphic minerals due to the UHP metamorphism,such as phengite,epidote and minor kyanite and *** alkaline minerals(e.g.,aegirine or aegirine-augite) have been observed in some of these *** LA-ICP-MS U-Pb dating results indicate that the protoliths of the gneissic metagranites have been generated in Mid-Neoproterozoic(770-780 Ma),and suffered both ultrahigh-pressure metamorphism in Early Mesozoic and subsequently high-pressure eclogite-facies recrystallization at about 215 *** the gneissic metagranites generally have high SiO2 contents(70.23%-77.23%) and show metaluminous-weakly peraluminous signatures(ASI=0.90-1.05),there are still some geochemical variances between different *** with the Sanzusi pluton,the metagranites from the Huangzhen,Daba,Shima,and Shuanghe have high K2O+Na2O contents(7.76%-9.45%),FeOtotal/(FeOtotal+MgO) ratios(0.82-0.96),HFSEs and Ga concentrations with an average 104×Ga/Al ratio up to *** with the features that the four plutons commonly contain aegirine-augite and have high zircon saturation temperatures(816-918°C),it is suggested that their proto-liths belong to peralkaline A-type *** Sanzusi pluton generally contains biotite and epidote generated from metamorphic reaction of amphibole,and is chemically enriched in calcium and depleted in potassium with K2

关键词： gneissic metagranite zircon U-Pb chronology geochemistry tectono-magmatism eastern margin of Dabie Mountains

Investigation of phosphate adsorption from an aqueous solution using spent fluid catalytic cracking catalyst containing lanthanum

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Frontiers of Environmental Science & Engineering 2018年第6期12卷 155-165页

作者： zhen Li Zhaofu qiu Ji Yang Benteng Ma Shuguang Lu Chuanhui Qin State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China

A spent fluid catalytic cracking (FCC) catalyst containing lanthanum (La) was used as a novel adsorbent for phosphorus (P) in simulated wastewater. The experiments were conducted in a batch system to optimize the operation variables, including pH, calcination temperature, shaking time, solid-liquid ratio, and reaction temperature under three initial P-concentrations (C0 = 0.5, 1.0, and 5.0 mg/L). Orthogonal analysis was used to determine that the initial P-concentration was the most important parameter for P removal. The P-removal rate exceeded 99% and the spent FCC catalyst was more suitable for use in low P-concentration wastewater (C0 <5.0 mg/L). Isotherms, thermodynamics and dynamics of adsorption are used to analyze the mechanism of phosphorus removal. The results show that the adsorption is an endothermic reaction with high affinity and poor reversibility, which indicates a low risk of second releasing of phosphate. Moreover, chemical and physical adsorption coexist in this adsorption process with LaPO4 and KH2PO4 formed on the spent FCC catalyst as the adsorption product. These results demonstrate that the spent FCC catalyst containing La is a potential adsorbent for P-removal from wastewater, which allows recycling of the spent FCC catalyst to improve the quality of water body.

关键词： Spent FCC catalyst Phosphate removal Adsorption Lanthanum

Berbamine inhibits proliferation and induces apoptosis of KU812 cells by increasing Smad3 activity

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第7期12卷 568-574页

作者： Yun LIANG Xi qiu Rong-zhen XU Xiao-ying ZHAO Department of Hematology the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 3 10009 China Cancer Institute School of Medicine Zhejiang University Hangzhou 310009 China

Objective: The cytotoxic effect of berbamine on chronic myeloid leukemia (CML) cell line KU812 was evaluated,and the mechanisms of its action were ***: The effect of berbamine on the KU812 cell growth was determined by methyl thiazolyl tetrazolium (MTT) *** cytometry was used to profile cell cycle alteration upon berbamine *** transcription polymerase chain reaction (RT-PCR) was carried out to determine the transcripts of transforming growth factor-β (TGF-β) receptors (TβRs),Smad3,c-Myc,cyclin D1,p21Cip1(p21),and p27Kip1(p27).Changes in the protein levels of total Smad3,phosphorylated Smad3,the downstream targets of Smad3,and specific apoptosis-related factors were evaluated by Western ***: Berbamine inhibited KU812 cell proliferation in a doseand time-dependent manner,and the half maximal inhibitory concentration (IC50) values for treatments of 24,48,and 72 h were 5.83,3.43,and 0.75 μg/ml,*** induced G1 arrest as well as apoptosis in KU812 *** of Smad3 and p21 were up-regulated,while those of TβRI,TβRII,c-Myc,cyclin D1 and p27 were not changed *** protein levels of both total Smad3 and phosphorylated Smad3 were both up-regulated after berbamine treatment,together with decreased c-Myc and cyclin D1 and increased ***,the levels of the anti-apoptotic proteins,such as Bcl-2 and Bcl-xL,were decreased,whereas pro-apoptotic Bax was ***: Berbamine suppresses KU812 cell proliferation through induction of cell cycle arrest in G1 and *** activates Smad3 without additional stimulation of TGF-β,and alters the levels of the Smad3 downstream targets,including c-Myc,cyclin D1 and *** findings suggest that berbamine is a promising drug in the treatment of advanced stage patients with CML.

关键词： Berbamine Apoptosis Smad3 KU812 cells

Hepatitis B virus infection and genotype in asymptomatic people from 10 ethnic groups in Yunnan, China

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World Journal of Gastroenterology 2015年第44期21卷 12586-12592页

作者： Yuan-Ying Shen Wei Hou zhan-qiu Yang Wen Xiao Institute of Virology Medical School of Wuhan University Dali University Institute of Eastern-Himalaya Biodiversity Research Dali University

AIM: To evaluate the infection and genotype distribution of hepatitis B virus(HBV) in ethnic groups in Yunnan, ***: Two thousand five hundred and eightyfour asymptomatic local people from 10 ethnic groups were investigated in Yunnan, China. Infection and genotype distribution were evaluated by serological and genetic methods. Genotyping was verified by sequencing. Ethnic genotype distribution was compared by proportion test. RESULTS: Four types of infection model based on HBV serum markers were identified, and the average HBV infection rate was 5.7% in those asymptomatic local people. The genotype prevalence was 59.6% for B, 21.1% for C and 19.3% BC; subgenotypes Ba, Cs and Ce were identified in this study. Hepatitis B surface antigen-positive rate and the proportion of genotype B were significantly lower in ethnic groups with a northern origin compared to those with a southern origin(50% vs 73.9%, P = 0.037; 4.2% vs 10.5%, P = 0.000).CONCLUSION: Genotype B is dominant and genotype BC has high occurrence in asymptomatic local ethnic groups in Yunnan. HBV infection status and genotype distribution may associate with ethnic origin.

关键词： Hepatitis B virus Infection and genotype Ethnic di

Sm-Nd,Pb-Pb and Rb-Sr Isotopic Dating and Its Dynamic Implications for the Proterozoic Augen Granite in the Yunkai Area,Western Guangdong Province

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 289-296页

作者： PENG Songbai zhanG Yeming zhan Mingguo CHEN Fuwen qiu Ruizhao Yichang Institute of Geology and Mineral Resources CAGSYichang 443003Hubei

The samples of ductile-rheologic deformational augen granite from the Yunkai uplift area, western Guangdong province, were determined by the whole-rock Sm-Nd, Pb-Pb and Rb-Sr isotopic dating to have an Sm-Nd isochron age of 1414±68 Ma, a Pb-Pb isochron age of 1388±90 Ma and a Rb-Sr isochron age of 490±36 Ma. The first two ages are interpreted as the formation age of this suite of granite and the last age represents the timing of the tectono-thermal event of Caledonian ductile-rheologic shear partial melting. It is indicated that in the study area not only an orogeny took place in the Caledonian, but also a more important tectono-magmatic activity occurred in the Meso-proterozoic there, which may be related to the subduction-collision between the Yangtze block and Cathaysia block.

关键词： Yunkai area Proterozoic augen granite isotopic dating ductile-rheologic shear

Water in the Mogao Grottoes,China:where it comes from and how it is driven

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Journal of Arid Land 2015年第1期7卷 37-45页

作者： HongShou LI WanFu WANG HongTao zhan Fei qiu QingLin GUO GuoBin zhanG The Conservation Institute of Dunhuang Academy State Administration for Cultural Heritage Key Scientific Research Base of Conservation for Ancient Murals Dunhuang Academy State Administration for Cultural Heritage

The Dunhuang Mogao Grottoes in China was designated as a world heritage site by UNESCO in 1987 and is famous for its cultural relics. Water is the most active factor that harms the relics in the caves as it damages the grotto murals and painted sculptures. Thus, determining the water sources and driving forces of water movement is a key issue for protecting these cultural relics. These issues have troubled relics protectors for a long time. In this study, the authors chose a representative cave in the Mogao Grottoes and, by completely sealing the cave to make a closed system, measured the water vapor from the surrounding rock. This was accomplished by installing a condensation-dehumidification temperature-humidity control system for the collection of water vapor. The results show that there is continuous evaporation from the deep surrounding rock into the cave. The daily evaporation capacity is determined to be 1.02 g/（d·m2）. The water sources and driving forces of water movement were further analyzed according to the character of the water evaporation and by monitoring the temperature and humidity of the surrounding rock. It was found that the water vapor in the cave derives from phreatic water. Moreover, the yearly fluctuation of temperature in the surrounding rock and geothermal forces are the basic powers responsible for driving phreatic evaporation. Under the action of the yearly temperature fluctuations, decomposition and combination of bound water acts as a ＂pump＂ that drives phreatic water migration and evaporation. When the temperature rises, bound water decomposes and evaporates; and when it falls, the rock absorbs moisture. This causes the phreatic water to move from deep regions to shallow ones. Determining the source and dynamic foundation of the water provides a firm scientific basis for protecting the valuable cultural relics in the caves.

关键词： the Silk Road cultural heritage surrounding rock bound and phreatic water thermodynamics

Apigenin ameliorates diabetic neuropathy in rats by modulating the TLR4/MyD88 signaling pathway

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Asian Pacific Journal of Tropical Biomedicine 2023年第11期13卷 469-478,I0003,I0004,I0005,I0006,I0008页

作者： Yan-Bo Yu Mi-zhen qiu Da-Ying zhang Department of Pain The First Affiliated Hospital of Nanchang UniversityNanchang 330006China

Objective:To determine the neuroprotective effects of apigenin against streptozotocin(STZ)-induced diabetic neuropathy(DN).Methods:To induce DN,Wistar rats(150-200 g)were administered with STZ(55 mg/kg,i.p.).Then they were randomly assigned to various groups,viz.,normal,diabetic control,insulin(10 IU/kg,s.c.),apigenin(5,10,and 20 mg/kg,p.o.),and insulin(10 IU/kg)plus apigenin(20 mg/kg,p.o.).Various behavioral,biochemical,and molecular markers[tumor necrosis factor-alpha(TNF-α),interleukin(IL)-1β,IL-6,Toll-like receptor 4(TLR4),myeloid differentiation primary response 88(MyD88),and nuclear factor erythroid 2-related factor 2(Nrf2)]were ***:Apigenin(10 and 20 mg/kg,p.o.)substantially reduced plasma glucose levels,lipid profile,aspartate transaminase,alanine transaminase,glycated hemoglobin,and neural advanced glycation end products in STZ-induced DN rats(P<0.05).After apigenin intervention,STZ-induced changes in food and water intake,body weight,urine output,allodynia,hyperalgesia,and insulin levels were markedly improved(P<0.05).Neural antioxidant enzymes(superoxide dismutase and glutathione)and Na+K+ATPase activity were also considerably elevated(P<0.05)while the level of lipid peroxidation was diminished following apigenin therapy(P<0.05).Furthermore,apigenin markedly upregulated the Nrf2 mRNA level while downregulating the mRNA expressions of TNF-αand ILs and the protein expressions of TLR4 and MyD88(P<0.05).STZ-induced histological abnormalities in the sciatic nerve were also improved by apigenin ***:Apigenin exerts its neuroprotective effect by modulating the inflammatory and oxidative stress pathways via regulating the TLR4-MyD88 signaling pathway.

关键词： Apigenin Diabetic neuropathy MyD88 Nrf2 Proinflammatory cytokines TLR4

Diagenesis and Evolution of the Holocene Coquinite from the Haishan Island,Eastern Guangdong,China

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Acta Geologica Sinica(English Edition) 2009年第1期83卷 70-80页

作者： SUN Jinlong XU Huilong qiu Xuelin zhan Wenhuan LI Yamin CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology the Chinese Academy of Sciences Guangzhou Guangdong 510301 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

The coastal hard rock with a thickness of over 5 m and a distribution area of nearly 200 ha in the Haishan Island, south China, has long drawn researchers＇ attention. However, there were controversies over its formation and classification, and these controversies in turn lead to the dispute of sea level changes and coastal uplift-subsidence of this area. To investigate its diagenesis and evolution, petrographic analysis, elemental geochemistry, isotopic analysis, and radiocarbon dating were used in the present study. Radiocarbon dating indicates that the deposition of the Haishan Coquinite commenced in the mid Holocene and lasted to -600 a B.P. Petrographic analysis shows that the Haishan Coquinite is cemented by low-Mg calcite, indicating that the cementation occurred in a meteoric environment. The elemental geochemistry and isotopic values demonstrate that the coquinite suffered strong leaching, which was thought to be responsible for the meteoric cementation of the coquinite. According to these results, the diagenesis of the coquinite is revealed： deposition of the Haishan Coquinite commenced in the mid Holocene in a shoal environment, initial cementation occurred and cement may be high-Mg calcite or aragonite; latterly the coquinite exposed to meteoric environment as a result of lowering of relative sea level, and the cement altered to low-Mg, which took the morphologies of bladed calcite rim and equant spar. A four-stage evolution model is proposed：（1） deposition stage, （2） initial cementation, （3） exposure to and cementation in meteoric environment, and （4） erosion stage. The published reports indicate that the hard rock should be designated as coquinite. Based on these studies, mid-Holocene sea level in this area was discussed, and the Haishan Island was proposed to uplift with a rate of ～5 mm/a in the last -600 a.

关键词： beachrock coquinite diagenesis evolution model mid Holocene sea level

The reversible addition-fragmentation chain transfer(RAFT) miniemulsion polymerization of vinyl acetate mediated by xanthate

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Chinese Chemical Letters 2009年第6期20卷 733-737页

作者： Bo Jiang Qing Hua zhang Xiao Li zhan Feng qiu Chen Department of Chemical and Biochemical Engineering Zhejiang University Hangzhou 310027 People's Republic of China

The reversible addition-fragmentation chain transfer （RAFT） miniemulsion polymerization of vinyl acetate （VAc） mediated by methyl （methoxycarbonothioyl） sulfanyl acetate （MMSA） was carried out. The results showed that polymerizations initiated by AIBN and KPS proceeded in a controlled way. The RAFT miniemulsion polymerization of VAc initiated by KPS showed the shorter inhibition period, higher propagation rate coefficient and final conversion than those in experiment initiated by AIBN. When the monomer conversion reached 25%, the polydispersity index （PDI） of polymer became broad, which was related to chain transfer reaction in RAFT miniemulsion of VAc.

关键词： Xinyl acetate Xanthate Reversible addition-fragmentation chain transfer Miniemulsion