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| 1 | Generation of B Cell-Deficient Pigs by Highly Efficient CRISPR/Cas9-Mediated Gene Targeting显示文摘Generating B cell-deficient mutant is the first step to produce human antibody repertoires in large animal models. In this study, we applied the clustered regularly interspaced short palindromic repeat(CRISPR)/CRISPR-associated(Cas) system to target the JHregion of the pig Ig M heavy chain gene which is crucial for B cell development and differentiation. Transfection of Ig M-targeting Cas9 plasmid in primary porcine fetal fibroblasts(PFFs) enabled inducing gene knock out(KO) in up to 53.3% of colonies analyzed, a quarter of which harbored biallelic modification, which was much higher than that of the traditional homologous recombination(HR). With the aid of somatic cell nuclear transfer(SCNT) technology, three piglets with the biallelic Ig M heavy chain gene mutation were produced. The piglets showed no antibody-producing B cells which indicated that the biallelic mutation of the Ig M heavy chain gene effectively knocked out the function of the Ig M and resulted in a B cell-deficient phenotype. Our study suggests that the CRISPR/Cas9 system combined with SCNT technology is an efficient genome-editing approach in pigs. | Fengjiao Chen Ying Wang Yilin Yuan Wei Zhang Zijian Ren Yong Jin Xiaorui Liu Qiang Xiong Qin Chen Manling Zhang Xiaokang Li Lihua Zhao Ze Li Zhaoqiang Wu Yanfei Zhang Feifei Hu Juan Huang Rongfeng Li Yifan Dai | 2015 | Journal of Genetics and Genomics2015，42，8： | 15 |
| 2 | A Domestication-Associated Gene GmPRR3b Regulates the Circadian Clock and Flowering Time in Soybean显示文摘Improved soybean cultivars have been adapted to grow at a wide range of latitudes,enabling expansion of cultivation worldwide.However,the genetic basis of this broad adaptation is still not clear.Here,we report the identification of GmPRR3b as a major flowering time regulatory gene that has been selected during domestication and genetic improvement for geographic expansion.Through a genome-wide association study of a diverse soybean landrace panel consisting of 279 accessions,we identified 16 candidate quantitative loci associated with flowering time and maturity time.The strongest signal resides in the known flowering gene E2,verifying the effectiveness of our approach.We detected strong signals associated with both flowering and maturity time in a genomic region containing GmPRR3b.Haplotype analysis revealed that GmPRR3bH6 is the major form of GmPRR3b that has been utilized during recent breeding of modern cultivars.mRNA profiling analysis showed that GmPRR3bH6 displays rhythmic and photoperiod-dependent expression and is preferentially induced under long-day conditions.Overexpression of GmPRR3bH6 increased main stem node number and yield,while knockout of GmPRR3bH6 using CRISPR/Cas9 technology delayed growth and the floral transition.GmPRR3bH6 appears to act as a transcriptional repressor of multiple predicted circadian clock genes,including GmCCAIa,which directly upregulates J/GmELF3a to modulate flowering time.The causal SNP(Chr12:5520945)likely endows GmPRR3bH6 a moderate but appropriate level of activity,leading to early flowering and vigorous growth traits preferentially selected during broad adaptation of landraces and improvement of cultivars. | Cong Li Ying-hui Li Yanfei Li Hongfeng Lu Huilong Hong Yu Tian Hongyu Li Tao Zhao Xiaowei Zhou Jun Liu Xinan Zhou Scott A.Jackson Bin Liu Li-juan Qiu | 2020 | Molecular Plant2020，13，5： | 11 |
| 3 | Recent Advances in Photocatalytic CO2 Reduction Using Earth-Abundant Metal Complexes-Derived Photocatalysts显示文摘 | Yanfei Zhao Zhimin Liu | 2018 | Chinese Journal of Chemistry2018，36，5： | 9 |
| 4 | Expert consensus on the glycemic management of critically ill patients显示文摘Introduction The incidence of hyperglycemia is 40-60%in critically ill patients and is up to 60-80%in those who have undergone car-diac surgery.[1]The results of an epidemiological study in the United States showed that 28.6%of diabetic patients and 9.3%of non-diabetic patients had elevated mean daily glucose on the day of ICU admission.[2]In critically ill patients,elevated blood glucose is primarily the result of stress,and stress-induced hy-perglycemia is an independent risk factor associated with prog-nosis,regardless of a previous diagnosis of diabetes.Nutritional therapy has become an integral treatment option for patients in the ICU,[3,4]though nearly 30%of patients with enteral nu-trition and 44-50%with parenteral nutrition(PN)experience elevated glucose.[5,6]Intensive insulin therapy(IIT)is an impor-tant treatment for controlling hyperglycemia in critically ill pa-tients,but it also carries a corresponding risk of hypoglycemia. | Zhixiong Wu Jiao Liu Dong Zhang Kai Kang Xiangrong Zuo Qianghong Xu Aijun Pan Wei Fang Fen Liu You Shang Haiyan Yin Juntao Hu Jinglun Liu Jiangquan Fu Wei Zhang Yuan Zong Min Shao Feng Zhao Mei Meng Yanfei Mao Yingchuan Li Dechang Chen | 2022 | Journal of Intensive Medicine2022，2，3： | 9 |
| 5 | Structure regulated catalytic performance of gold nanocluster-MOF nanocomposites显示文摘Atomically precise gold(Au)nanoclusters(NCs)as visible light photosensitizers supported on the substrate for photoredox catalysis have attracted considerable attentions.However,eficient control of their photocatalytic activity and long-term stability is still challenging.Herein,we report a coordination-assisted self-assembly strategy in combination with electrostatic interaction to sandwich Au2:(Capt)18(abbreviated as AU25,Capt=captopril)NCs between an inner core and an outer shell made of UiO-66,denoted as UiO-66@Au25@UiO-66.Notably,the sandwich-like nanocomposite displays significantly enhanced catalytic activity along with an excellent stability when used in the selective photocatalytic aerobic oxidation of sulfide to sulfoxide.As comparison,AU25 NCs simply located at the outer surface or insider matrix of UiO-66(short as Au2/UiO-66 and AU2s@UiO-66)show poor stability and low conversion,respectively.This structure regulated difference in the catalytic performances of three nanocomposites is assigned to the varied distribution of active sites(Au NCs)in metal-organic frameworks(MOFs).This work offers the opportunity for application of nanoclusters in catalysis,energy conversion and even biology. | Yanfei Zhu Xueying Qiu Shenlong Zhao Jun Guo Xiaofei Zhang Wenshi Zhao Yanan Shi Zhiyong Tang | 2020 | Nano Research2020，13，7： | 7 |
| 6 | Mesoporous silica SBA-15 functionalized with phosphonate and amino groups for uranium uptake显示文摘Mesoporous silicas have a very attractive ability of sorption and enrichment of metal ions due to their huge surface area and facile functionalization by organic ligands.In this work,phosphonate-amino bifunctionalized mesoporous silica SBA-15(PA-SBA-15) as U(VI) sorbent was fabricated through post-grafting method.The obtained mesoporous silica was characterized by SEM,XRD,NMR and nitrogen sorption/desorption experiments,which revealed the existence of ordered mesoporous structure with uniform pore diameter and large surface area.The adsorptivity of PA-SBA-15 for U(VI) from aqueous solution was investigated using batch sorption technique under different experimental conditions.The preliminary results show that the U(VI) sorption by PA-SBA-15 is very quick with equilibrium time of less than 1 h,and the U(VI) uptake is as large as 373 mg/g at pH 5.5 under 95 ℃.The sorption isotherm has been successfully modeled by the Langmuir isotherm,suggesting a monolayer homogeneous sorption of U(VI) in PA-SBA-15.The sorption is pH-dependent due to the pH-dependent charge of sorbent in the aqueous solution.The thermodynamics research shows that the sorption is a feasible and endothermic process.Based on these results,PA-SBA-15 could be a promising solid phase sorbent for highly-efficient removal of U(VI) ions from waste water and enrichment of U(VI) from a solution at a very low level. | WANG XiaoLiang YUANLiYong WANG YanFei LI ZiJie LIU YaLan FENG YiXiao ZHAO YuLiang CHAI ZhiFang SHI WeiQun | 2012 | Science China Chemistry2012，55，9： | 6 |
| 7 | Advanced photocatalysts based on metal nanoparticle/metalorganic framework composites显示文摘Photocatalysis,via conversion of light into valuable chemicals,is an economic and effective way to utilize inexhaustible solar energy for the sustainable development of our human society.Aiming at killing two birds with one stone,metal nanoparticle(MNP)/metal-organic framework(MOF)composites via integration of the individual advantages of MNP and MOF have been becoming a versatile photocatalyst.Moreover,owing to the synergist effect between each component,MNP/MOF composite photocatalysts usually show greatly promoted catalytic activity,selectivity and long-term recyclability.In this review,first of all,the widely adopted synthesis strategies of MNP/MOF composite are introduced comprehensively,and then their recent advances in photocatalysis including photocatalytic hydrogen production,carbon dioxide reduction,organic transformation reactions and photodegradation of pollutants are summarized and highlighted.Finally,challenges and perspectives among MNP/MOF based photocatalysis are also proposed and discussed for advancing further development in this hot research field. | Jun Guo Yue Wan Yanfei Zhu Meiting Zhao Zhiyong Tang | 2021 | Nano Research2021，14，7： | 6 |
| 8 | Towards Flexible All-Carbon Electronics:Flexible Organic Field-Effect Transistors and Inverter Circuits Using Solution-Processed All-Graphene Source/Drain/Gate Electrodes显示文摘Flexible organic field-effect transistors(OFETs)using solution-processable functionalized graphene for all the electrodes(source,drain,and gate)have been fabricated for the first time.These OFETs show performance comparable to corresponding devices using Au electrodes as the source/drain electrodes on SiO2/Si substrates with Si as the gate electrode.Also,these devices demonstrate excellent flexibility without performance degradation over severe bending cycles.Furthermore,inverter circuits have been designed and fabricated using these all-graphene-electrode OFETs.Our results demonstrate that the long-sought dream for all-carbon and flexible electronics is now much closer to reality. | Yongsheng Chen Yanfei Xu Kai Zhao Xiangjian Wan Jiachun Deng Weibo Yan | 2010 | Nano Research2010，3，10： | 5 |
| 9 | Strengthening in Al-,Mo-or Ti-doped CoCrFeNi high entropy alloys:A parallel comparison显示文摘In the current work,a parallel comparison of the influence of Al,Mo and Ti,on the microstructure and strengthening of the CoCrFeNi alloy was conducted.To achieve this,inconsistencies on variables including the extent of alloying,thermomechanical processing and property-evaluation method were avoided.Microstructurally,following cold-rolling,annealing of the 4 at.%Al-doped alloys at 800-1000℃ did not result in phase separation;nevertheless,that of the 4 at.%Mo-and Ti-doped alloys led to the respective formation ofσandηphase and,consequently,caused extra strengthening through the Orowan dislocation bypassing mechanism.Our systematic qualitative analysis and DFT calculations showed that Al and Ti are more effective than Mo in reducing the stacking fault energy(SFE)of the CoCrFeNi alloy,because they can induce more considerable deformation of electronic density,making the gliding of atomic layers easier.Following identical thermomechnical processing,Al-,Mo-,and Ti-doping causes different extent of solid solution strengthening and grain boundary strengthening.Mo causes the most pronounced solid solution strengthening but does not benefit the grain boundary strengthening;in contrast,the effectiveness of grain boundary strengthening is boosted by the doping Al and Ti.Current analyses support that Labusch instead of Fleischer mechanism is applicable to explain the differences in solid solution strengthening,and the observed differences in grain boundary strengthening arise from the different tendency of Al,Mo and Ti to reduce the SFE of CoCrFeNi.In addition,we determined the value of the dimensionless parameter f in the Labusch model for CoCrFeNi-based alloys and observed a close relation between Hall-Petch slope and SFE.Although more in-depth studies are needed to provide full and mechanistic understandings,both these findings in fact presents significant values toward designing novel singlephase high-strength CoCrFeNi-based alloys through manipulating the solid solution and grain boundary strengthening by compositional tuning. | Xi Li Zhongtao Li Zhenggang Wu Shijun Zhao Weidong Zhang Hongbin Bei Yanfei Gao | 2021 | Journal of Materials Science & Technology2021，，35： | 4 |
| 10 | Characterization of zirconia-based slurries with different binders for titanium investment casting显示文摘The materials and physical properties of primary slurry are crucial to the surface quality of the finished castings,especially for high reactivity titanium alloys.The aim of this study is to investigate the influence of different binders on the physical properties of primary slurry for titanium alloy investment casting.The zirconia-based slurries with different binders were evaluated by comparing the parameters:viscosity,bulk density,plate weight, suspensibility,gel velocity and strength.The results indicate that a higher viscosity of binder leads to a higher viscosity and suspensibility of slurry with the same powder/binder ratio.The retention rate and thickness of primary layer increase with an increase in the viscosity of the slurry,and a higher retention rate is associated with a thicker primary layer.The gel velocity of the slurry is correlated with the gel velocity of the binder.The green strength and the baked strength of the primary layer are determined by the properties of the binder after gel and by the production of the binder after fired,respectively. | Zhao Ertuan Kong Fantao Chen Yanfei Chen Ruirun Chen Yuyong | 2012 | China Foundry2012，9，2： | 4 |
| 11 | Numerical experiment rock fragmentation by combined dynamic and static loads under dual-cutter head显示文摘This paper puts forward a new rock fragmentation loading method of dual-cutter head combined dynamic and static loads.By applying the numerical simulation software-RFPA2D,we have done numerical experiment about the siltstone's crushing effect by dynamic load on single cutter head without confining pressure,dynamic load on single cutter head with confining pressure 10MPa and different dual-cutter heads spacing by combined dynamic and static loads with confining pressure 10MPa.Experimental results show that the confining pressure can obviously affect the rock fragmentation effect.Combined dynamic and static loads can greatly improve the rock fragmentation effect.There exists an optimal spacing of dual-cutter head that can make the rock fragmentation achieve the desired effect.Through analyzing the acoustic emission accumulative energy and quantity,the authors make a conclusion that the optimum spacing is 30 mm. | Zhao Fujun Wang Hongyu Shen Peiwen Chen Caixian Xu Yanfei | 2012 | Engineering Sciences2012，10，2： | 3 |
| 12 | Advances in Studies on Interaction between Selenium and Heavy Metal Cadmium显示文摘Selenium is an essential functional element of the human body,and the issue of selenium accompanying heavy metals is receiving much concern.This paper expounded the form of existence of selenium and cadmium in soil and influencing factors of their bioavailability,and further elaborated the interaction between selenium and cadmium.On the basis,it provided references for further studies on the interaction between selenium and cadmium,and provided basis for establishing selenium-enriched barrier technology for crops. | Liping PAN Yongxian LIU Yanfei HUANG Mengling NONG Shiyang LU Jinping CHEN Yuying ZHAO Liumei XIONG Xiu LAN Kebing LI | 2017 | Asian Agricultural Research2017，9，8： | 3 |
| 13 | Choline-based ionic liquids for CO_2 capture and conversion显示文摘Choline-based ionic liquids(Ch-ILs) with anions possessing interacting sites to attract CO_2 were designed, which could capture CO_2 with capacity >1.0 mol CO_2 per molar IL under ambient conditions. Moreover, this kind of ILs combining with Cu Cl could catalyze the formylation of amines with CO_2/H_2 at 120 °C. Especially, choline imidazolate showed the best performance,affording a series of N-formamides in excellent yields. It was demonstrated that the IL activated CO_2 and the synergistic effect between the IL and Cu Cl resulted in the high activity for catalysing the formylation of amines with CO_2/H_2. | Ruipeng Li Yanfei Zhao Zhiyong Li Yunyan Wu Jianji Wang Zhimin Liu | 2019 | Science China Chemistry2019，62，2： | 3 |
| 14 | Construction of Rat Model of Hepatic Fibrosis with Blood Stasis Syndrome Integrated with Traditional Chinese Medicine(TCM)Syndrome and Western Medicine Disease显示文摘[Objective]According to the theory of blood stasis in traditional Chinese medicine( TCM),the animal modeling method of hepatic fibrosis integrated with pathology and symptoms was explored and improved,to construct a new type of rat model of hepatic fibrosis with blood stasis syndrome integrated with traditional Chinese and western medicine. [Method]The hepatic fibrosis model of blood stasis with blood stasis syndrome was constructed by jointing multi factors,including intragastric administration of ethanol,high fat and low protein feeding,joint injection of dimethylnitrosamine( DMN),bovine serum albumin( BSA) and norepinephrine( NE). The modeling method was further compared with traditional CC14 single-factor modeling method from the aspects of mortality,blood stasis syndrome of TCM,syndrome grading,general morphology of liver pathology,liver function changes,as well as expression levels of three kinds of collagen( type I and type III collagen,α-SMA) determined by immunohistochemical staining method,and four items of rat hepatic fibrosis( HA,P3 NP,LN,CⅣ content) determined by radio enzyme immunoassay. [Result]In blood stasis group,(1) the mortality of rats was 20%;(2) model rats appeared typical blood stasis syndromes of TCM such as ecchymosis,dark purple tongue,loose stool,and blood stasis syndrome grading was high;(3) fibrosis changes of liver such as dark white surface,dense gray nodules and brittle texture were observed in general morphological examination;(4) serological liver function tests found that ALT and AST of model rats,as well as TBIL,DBIL and IBIL contents increased significantly;(5) immunohistochemical staining demonstrated that the expression levels of three kinds of collagen(type I and type III collagen,α-SMA) increased significantly;(6) four items of rat serum hepatic fibrosis,HA,P3 NP,LN,CⅣ content,increased significantly;(7) the above results in blood stasis syndrome model group(except morality and liver function) were higher than those in CC14 modeling group,and the difference was statistically significant( P < 0. 05). [Conclusion]The new improved modeling method effectively reduces high mortality in traditional CC14 modeling method.In addition to low mortality,the model animal has dual characteristics of disease in western medicine and syndrome in TCM. It is consistent with the pathological characteristics of hepatic fibrosis in western medicine when according with the basic characteristics of blood stasis syndrome in TCM. | Peng Yue Duan Xuelin Zhao Tiejian Yao Le Wei Yanfei Li Guiyu | 2017 | Animal Husbandry and Feed Science2017，9，2： | 3 |
| 15 | Forecasting of dissolved oxygen in the Guanting reservoir using an optimized NGBM(1,1) model显示文摘An optimized nonlinear grey Bernoulli model was proposed by using a particle swarm optimization algorithm to solve the parameter optimization problem. In addition, each item in the first-order accumulated generating sequence was set in turn as an initial condition to determine which alternative would yield the highest forecasting accuracy. To test the forecasting performance, the optimized models with different initial conditions were then used to simulate dissolved oxygen concentrations in the Guanting reservoir inlet and outlet(China). The empirical results show that the optimized model can remarkably improve forecasting accuracy, and the particle swarm optimization technique is a good tool to solve parameter optimization problems. What's more, the optimized model with an initial condition that performs well in in-sample simulation may not do as well as in out-of-sample forecasting. | Yan An Zhihong Zou Yanfei Zhao | 2015 | Journal of Environmental Sciences2015，27，3： | 3 |
| 16 | Identification of an E3 ligase-encoding gene RFWD3 in non-small cell lung cancer显示文摘In order to unveil ubiquitin pathway genes (UPGs) that are essential for non-small cell lung cancer (NSCLC) cell proliferation,we recently conducted a siRNA screening experiment to knockdown the expression of 696 UPGs found in the human genome in A549 and H1975 NSCLC cells.We found that silencing of one of the candidates,RFWD3 that encodes an E3 ubiquitin ligase essential for the repair of DNA interstrand cross-links inresponse to DNA damage,led to dramatic inhibition of NSCLC cell proliferation with significant Z-scores.Knockdown of RFWD3 suppressed colony forming activity of NSCLC cells.We further evaluated the significance of RFWD3 in NSCLCs and found that this gene was more elevated in tumor samples than in paired normal lung tissues and was inversely associated with the clinical outcome of patients with NSCLC.Moreover,RFWD3 expression was significantly higher in smokers than in non-smokers.These results show for the first time that RFWD3 is required for NSCLC cell proliferation and may have an important role in lung carcinogenesis. | Yanfei Zhang Xinchun Zhao Yongchun Zhou Min Wang Guangbiao Zhou | 2020 | Frontiers of Medicine2020，14，3： | 3 |
| 17 | Pd nanoparticles immobilized on graphite oxide modified with a base: Highly efficient catalysts for selective hydrogenation of citral显示文摘In this work, the Pd-based catalysts were designed via immobilizing Pd nanoparticles on graphite oxide (GO) modified with organic base, 1,1,3,3-tetramethylguanidine (TMG), which was used for the selective hydrogenation of citral. These catalysts were characterized by various techniques including IR, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated that the Pd particles with size less than 5 nm were uniformly distributed throughout the support, and they were in the electron-deficient state due to the strong interactions with the modified support. The resultant Pd-TMG/GO catalyst displayed high efficiency for the selective hydrogenation of citral with a turnover frequency of 7100 h-1 as well as superior selectivity to citronellal of 89.6%. Moreover, the catalyst can be reused for five times without obvious activity loss, which may result from its stable structure. | ZHAO YanFei ZHANG HongYe HUANG ChangLiang CHEN Sha YU Bo XU JiLei LIU ZhiMin | 2013 | Science China Chemistry2013，56，2： | 3 |
| 18 | Experimental Study on Chemical Looping With Oxygen Uncoupling Using Copper Based Oxygen Carrier and Different Volatiles Contained Coal Chars显示文摘采用溶胶一凝胶法制备CuO/CuAl204氧载体,研究了该氧载体在N2气氛下的释氧性能,发现氧载体774℃时开始释氧,且随着温度的升高氧气含量不断升高。随后,在流化床反应器中研究了挥发分含量不同的6种煤焦的化学链氧解耦燃烧(chemicalloopingwithoxygenuncoupling,CLOU)特性,结果表明,挥发分含量的增加和温度的升高均会加速煤焦燃烧,煤焦中碳元素转化率达到95%所需要的时间随着挥发分含量及温度的升高不断减少,相应的碳的平均转化率也不断增加;然而,较高的挥发分含量和反应温度都会导致CO2捕集率的下降。对于挥发分含量低的高平煤焦和东欢坨煤焦,C02捕集率超过99%,而对于挥发分高的胜利褐煤焦,C02捕集率不足95%。 | MEI Daofeng ZHAO Haibo MA Zhaojun FANG Yanfei ZHENG Chuguang | 2013 | 中国电机工程学报2013，33，11： | 3 |
| 19 | Effects of Aqueous Extract of Plumbago zeylanica L. in the Reversal of DMN-induced Hepatic Fibrosis in Rat显示文摘[Objectives] This study was conducted to evaluate the action of the aqueous extract of a medicinal plant Plumbago zeylanica L. in the reversal of dimethylnitrosamine( DMN)-induced hepatic fibrosis in rats,and to provide a scientific basis for the utilization of P. zeylanica in treatment of hepatic fibrosis. [Methods] Hepatic fibrosis in rats was induced by intraperitoneal injection of DMN. The rats were then given the aqueous extract of P. zeylanica at high,medium or low concentration by gavage for five weeks. Serum level of alanine aminotransferase( ALT) was determined by lactate dehydrogenase( LDH)-release assay,and serum level of aspartate transaminase( AST) was measured by UV-malate dehydrogenase( MDH) assay. Serum levels of total bilirubin( TBIL),direct bilirubin( DBIL)and indirect bilirubin( IBIL) were measured by vanadate oxidation assay. Four indices of hepatic fibrosis( hyaluronic acid,laminin,procollagen type Ⅲ and collagen type IV) were determined by radioimmunoassay( RIA) assay. Morphological damage of liver tissue was observed by hematoxylin-eosin staining( H&E staining). Immunohistochemical staining was performed to determine the location and area of deposited collagen type I,collagen type Ⅲ and α-smooth muscle actin( α-SMA) in liver tissue. [Results]Compared with the negative control( rats with diseased liver and untreated with P. zeylanica aqueous extract),the serum levels of ALT,AST,TBIL,DBIL and IBIL were significantly decreased by P. zeylanica aqueous extract; the levels of the four serum indices of hepatic fibrosis were also obviously reduced. H&E staining showed that hepatic fibrosis in rats was obviously inhibited or even reversed by P. zeylanica aqueous extract. Immunohistochemical staining proved that the aqueous extract of P. zeylanica significantly reduced the area and coloration of collagen type I,collagen type Ⅲ and α-SMA in rat liver. [Conclusions] The aqueous extract of P. zeylanica has a definite effect in reversal of DMN-induced hepatic fibrosis in rat by promoting the recovery of liver function,reversal of histopathological changes and reducing fibrotic collagen. | Yue PENG Xuelin DUAN Tiejian ZHAO Yanfei WEI Guiyu LI Lulu LIU | 2017 | Agricultural Biotechnology2017，6，3： | 3 |
| 20 | Experimental Constraints on Formation of Low-Cr# Chromitite: Effect of Variable H2O and Cr2O3 on Boninitic-Magma and Harzburgite Reactions显示文摘Reactions between a boninitic or basaltic magma and harzburgite at shallow mantle depths are thought to be closely related to the formation of podiform chromitites,but little experimental data is available on these reactions.In this study,a series of experiments were conducted at 1.5GPa and 1 000–1 400 oC to investigate the interactions between boninitic magma and harzburgite in homogenous mixed systems with varied bulk concentrations of water(~0.7 wt.%–10 wt.%)and Cr2O3(~0.2 wt.%–4 wt.%).In the experimental charges,chromite grains can be observed coexisting with orthopyroxene,clinopyroxene±olivine,and quenched melt in the Cr-bearing systems.The bulk concentration of Cr2O3 in the starting material has a slight effect on compositional changes in the chromites generated.However,the Cr#(Cr#=100×Cr/(Cr+Al))and Mg#(Mg#=100×Mg/(Mg+Fe))values for the chromites exhibit positive and negative correlations,respectively,with the bulk H2O concentrations.At 1 100 oC,chromite Cr#values range from^33–35 to^58–65,and chromite Mg#values range from^70–73 to^55–58when bulk H2O contents in the starting material are increased from^0.7 wt.%to^10 wt.%.The experimentally produced chromites have compositions(as expressed by Cr#,Mg#,and Ni O and Mn O contents)similar to natural chromites from low-Cr#chromitite bodies.We suggest that the interactions between boninitic magmas with varied H2O contents and harzburgite in a shallow mantle wedge could be a possible mechanism that forms the low-Cr#chromitites found in ophiolites.We emphasize here that H2O may play an important role in the compositional evolutions of natural chromitites. | Yage Zhao Yanfei Zhang Chao Wang Zhenmin Jin Qijin Xu | 2020 | Journal of Earth Science2020，31，4： | 3 |
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