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Zircon Zr isotope fractionation during crustal anatexis

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Science China Earth Sciences 2024年第8期67卷 2495-2506页

作者： Erlin zhu Qiongxia xia Zhaoya li Renxu CHEN James VAN ORMAN School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China State Key Laboratory of lithospheric and Environmental Coevolution Hefei 230026China Frontiers Science Center for Planetary Exploration and Emerging Technologies University of Science and Technology of ChinaHefei 230026China Department of Earth Environmental and Planetary SciencesCase Western Reserve UniversityCleveland OH 44106USA

Zirconium is one of high field strength elements but its isotope behavior during geochemical processes is still uncertain because of the limited *** Zr isotopes in magmatic rocks are often used to trace the evolution of magmas through fractional crystallization,it is intriguing how highly heterogeneous Zr isotopes were produced by the growth of zircon during crustal *** address this issue by in-situ zircon Zr isotope analyses of migmatites from two high-temperature metamorphic terranes in the South Lhasa zone and the North Dabie zone,respectively,in *** results show highly variable δ^(94)Zr values from-0.30‰ to +0.81‰ and from-0.58‰ to +0.49‰,*** addition to the relict zircon of magmatic origin,two types of newly-grown zircons were identified in terms of their occurrences,trace elements and δ^(94)Zr *** peritectic zircon,mainly occurring in the in-situ leucosomes,exhibits the highest Nb-Ta-Hf-U contents and variably higher δ^(94)Zr values than those of the relict *** anatectic zircon,mainly occurring in the leucocratic veins,shows higher Nb-Ta-Hf-U contents than and similar δ^(94)Zr values to those of the relict *** calculations demonstrate that the variable Zr isotope compositions of newly-grown zircons would result from decoupled release of Zr from zircon and non-zircon *** Zr supply of the peritectic zircon is mainly derived from the decomposition of Zr-bearing minerals in the in-situ anatectic melt(the non-zircon effect),whereas the Zr supply of the anatectic zircon is mainly from the dissolution of pre-existing zircons in the evolved melt(the zircon effect).The significant Zr isotope variations in the migmatites well illustrate the generation,migration and accumulation of the anatectic melts during the partial ***,Zr isotopes can be used as a powerful means for distinguishing between the peritectic and anatectic zircons during crustal anatexis.

关键词： Zr isotopes Zircon effect Non-zircon effect Migmatite Crustal anatexis

Novel compound heterozygous mutations in DNAH1 cause primary infertility in Han Chinese males with multiple morphological abnormalities of the sperm flagella

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Asian Journal of Andrology 2023年第4期25卷 512-519页

作者： Meng Wang Qi-Yu Yang Jue-Pu Zhou Hui-Ping Tan Juan Hu Lei Jin li-xia zhu Reproductive Medicine Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

This study aimed to identify genetic causes responsible for multiple morphological abnormalities of the sperm flagella(MMAF)in the Han Chinese *** primary infertile males with completely immobile sperm and MMAF were ***-exome sequencing and Sanger sequencing were performed to identify disease-causing ***,morphological and ultrastructural analyses of sperm flagella were *** probable impact of genetic variants on protein function was analyzed by online bioinformatic tools and immunofluorescence *** patients with dynein axonemal heavy chain 1(DNAH1)gene compound heterozygous variations were ***1 c.7435C>T,p.R2479X and c.10757T>C,p.F3586S were identified in the patient from Family 1,c.11726_11727delCT,p.P3909fs and c.12154delC,p.L4052fs were found in the patient from Family 2,and c.10627-3C>G and c.11726_11727delCT,p.P3909fs existed in the patient from Family *** of these variations have not been reported,and all the mutations showed pathogenicity by functional effect *** absence of the center pair and disorganization of the fibrous sheath were present in sperm flagella at the ultrastructural ***,the expression of DNAH1 was absent in spermatozoa from the participants,validating the pathogenicity of the *** three couples have undergone intracytoplasmic sperm injection(ICSI),and two couples of them became pregnant after the *** conclusion,the newly identified DNAH1 mutations can expand the mutational and phenotypic spectrum of MMAF genes and provide a theoretical basis for genetic diagnosis in MMAF *** is recommended to conduct genetic screening in male infertility patients with MMAF and provide rational genetic counseling,and ICSI might be an optimal strategy to help with fertilization and conception for patients with DNAH1 mutations.

关键词： DNAH1 intracytoplasmic sperm injection male infertility MMAF mutation

One-and Two-Neutron Transfer Reactions in ^(11)Be+^(208)Pb and Mechanism of Lowering Fusion Barrier

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Chinese Physics Letters 2000年第11期17卷 789-791页

作者： WANG Ning li zhu-xia WU Xi-Zhen WANG Nan SUN Xiu-Quan China Institute of Atomic Energy Beijing 102413 Department of Physics of Northwest University Xian 710069 Nuclear Theory Center of National Laboratory of Heavy Ion Accelarator Lanzhou 730000

We study one-and two-neutron transfer reactions in ^(11)Be+^(208)Pb by using the quantum molecular dynamics *** find that lowering about 1-2 MeV of the potential barrier of ^(208)Pb for fusion is gained when two neutrons separated from ^(11)Be enter into ^(208)*** no significant change of potential barrier is found when only the halo neutron separated from ^(11)Be enters into ^(208)*** dynamical interplay between suppression and enhancement effects on the fusion probability in reaction ^(11)Be+^(208)Pb stemming from the easy separation of halo neutron and the long extending of neutron distribution is discussed.

关键词： separated gained separation

Behavior of the Lyapunov Exponent and Phase Transition in Nuclei

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Chinese Physics Letters 2000年第10期17卷 711-713页

作者： WANG Nan WU Xi-Zhen li zhu-xia WANG Ning zhuO Yi-Zhong SUN Xiu-Quan China Institute of Atomic Energy Beijing 102413 Department of Physicsf Northwest University Xi'an 710069 Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080 Nuclear Theory Center of National Laboratory of Heavy Ion Accelerator Lanzhou 730000

Based on the quantum molecular dynamics model,we investigate the dynamical behaviors of the excited nuclear system to simulate the latter stage of heavy ion reactions,which associate with a liquid-gas phase *** try to search a microscopic way to describe the phase transition in *** Lyapunov exponent is employed and examined for our *** find out that the Lyapunov exponent is one of good microscopic quantities to describe the phase transition in hot *** potential and the finite size effect may give a strong influence on the critical ***,the collision term plays a minor role in the process of the liquid-gas phase transition in finite systems.

关键词： temperature. transition. exponent

Anisotropic microtopography surface of chitosan scaffold regulating skin precursor-derived Schwann cells towards repair phenotype promotes neural regeneration

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Regenerative Biomaterials 2024年第3期3卷 68-81页

作者： Meng Cong xia Wu lingjie zhu Guohao Gu Fei Ding Guicai li Haiyan Shi Key Laboratory of Neuroregenration of jiangsu and Ministry of Education and Co-Innovation Center of Neuroregeneration Nantong UniversityNantong 226001China Department of Pathophysiology School of MedicineNantong UniversityNantong 226001China

For repairing peripheral nerve and spinal cord defects,biomaterial scaffoid-based cell-therapy was emerged as an effective strategy,requiring the positive response of seed cells to biomaterial substrate and environment *** work highlighted that the imposed surface properties of scaffold could provide important guidance cues to adhered cells for ***,the insufficiency of native Schwann cells and unclear cellular response mechanisms remained to be *** that,this study aimed to illuminate the micropatterned chitosan-film action on the rat skin precursor-derived Schwann cells(SKP-SCs).Chitosanfilm with different ridge/groove size was fabricated and applied for the SKP-SCs *** indicated that SKP-SCs cultured on 30μm size microgroove surface showed better oriented alignment *** SKP-sCs presented similar genic phenotype as repair Schwann cells,increasing expression of c-Jun,neural cell adhesion molecule,and neurotrophic receptor ***,SKP-SC-secretome was subjected to cytokine array GS67 assay,data indicated the regulation of paracrine phenotype,a panel of cytokines was verifed up-regulated at secreted level and gene expression level in induced *** up-regulated cytokines exhibit a series of promotive neural regeneration functions,including cell survival,cell migration,cell proliferation,angiogenesis,axon growth,and cellular organization *** bioinformatics ***,the effectively polarized SKP-SCs-sourced secretome,promoted the proliferation and migration capacity of the primarily cultured native rat Schwann cells,and augmented neurites growth of the cultured motoneurons,as well as boosted axonal regrowth of the axotomy-injured *** together,SKP-SCs obtained pro-neuroregeneration phenotype in adaptive response to the anisotropic topography surface of chitosan-film,displayed the oriented parallel growth,the transition towards repair Schwann cell genic phenot

关键词： anisotropic microtopography skin precursor-derived Schwann cells chitosan-flm neural regeneration phenotype regulation

Low-cost dopant-free fluoranthene-based branched hole transporting materials for efficient and stable n-i-p perovskite solar cells

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Chinese Chemical Letters 2024年第10期35卷 213-219页

作者： Xinyu Yu Fei Wu xianglang Sun linna zhu Baoyu xia Zhong'an li Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy Faculty of Materials & Energy Southwest University

It has been widely recognized that hole transporting materials(HTMs) play a key role in the rapid progress of perovskite solar cells(PVSCs). However, common organic HTMs such as spiro-OMe TAD not only suffer from high synthetic costs, but also usually require the additional chemical doping process to improve their hole transport ability, which unfortunately induces the terrible stability issue. Therefore, it is urgent to develop low-cost dopant-free HTMs for efficient and stable PVSCs. In this work, we have successfully developed a new class of efficient dopant-free fluoranthene-based HTMs(TPF1–5) with quite low lab synthetic costs by combining donor-acceptor and branched structure designs. The detailed structure-property study revealed that tuning the twisted arms at different substitution sites would regulate the intermolecular interactions and film-forming ability, thereby significantly affecting the performance of the HTMs. By applying these HTMs in conventional PVSCs, the dopant-free TPF1-based devices not only achieved the best efficiency of 21.76%, which is comparable to that of the doped spiro-OMeTAD control devices, but also showed much better operational stability, which maintained over 87% of the initial efficiency under maximum power point tracking after 1038 h.

关键词： Dopant-free Fluoranthene Hole transporting materials Low-cost Perovskite solar cells

Theoretical and experimental investigations on single-atom catalysis:Pt_(1)/FeO_(x) for water-gas shift reaction

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Nano Research 2024年第9期17卷 8627-8637页

作者： Shan-Fei Wang Yangyang li Haiyan Wang Jin-xia liang Chun zhu Botao Qiao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Oxide-supported metal single-atom catalysts(SACs)have exhibited excellent catalytic performance for water-gas shift(WGS)***,we report the single-atom catalyst Pt1/FeOx exhibits excellent medium temperature catalytic performance for WGS reactions by the density functional theory(DFT)calculations and experimental *** calculations indicate that H_(2)O molecules are easily dissociated at oxygen vacancies,and the formed*OH and*O are adsorbed on Pt1 single atoms and the adjacent O atoms,*** studying four possible reaction mechanisms,it is found that the optimal WGS reaction pathway is proceeded along the carboxyl mechanism(pathway III),in which the formation of*COOH intermediates can promote the stability of Pt_(1)/FeO_(x) SAC and the easier occurrence of WGS *** energy barrier of the rate-determining step during the entire reaction cycle is only 1.16 eV,showing the high activity for the medium temperature WGS reaction on Pt_(1)/FeO_(x) SAC,which was verified by experimental ***,the calculated turnover frequencies(TOFs)of CO_(2)and H_(2)formation on Pt1/FeOx at 610 K(337℃)can reach up to 1.14×10^(-3)s^(-1)·site^(-1)through carboxyl *** this work,we further expand the application potential of Pt1/FeOx SAC in WGS reaction.

关键词： water-gas shift(WGS)reaction single-atom catalyst(SAC) density functional theory(DFT) thermocatalysis

Synchronous diagnosis and treatment of acute myeloid leukemia and chronic lymphocytic leukemia:Two case reports

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World Journal of Clinical Cases 2021年第30期9卷 9144-9150页

作者： Rong-Rong Chen li-xia zhu Lu-Lu Wang Xue-Ying li Jia-Nai Sun Mi-Xue Xie Jing-Jing zhu De Zhou Jian-Hu li Xin Huang Wan-zhuo Xie Xiu-Jin Ye Department of Hematology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003Zhejiang ProvinceChina

BACKGROUND The concurrence of acute myeloid leukemia(AML)and chronic lymphocytic leukemia(CLL)is *** reports of such cases have focused mainly on clinical diagnosis and characteristics,so the mechanism remains unclear,and therapy options have been poorly *** SUMMARY Here,we report two cases of synchronous AML and *** cytometry revealed two distinct abnormal cell populations(myeloblasts and lymphoid cells)according to scatter ***5-positive B cell lymphoma with myeloid leukemia invasion was observed on lymph node *** regimens indicated for both AML and CLL were used in our patients,and our patients achieved complete response after ***-generation sequencing of 88 genes was *** We conclude that early mutation and dysregulation at the hematopoietic stem cell stage and the accumulation of multiple rearrangements may cause the concurrence of CLL and *** treatment of infection and combination therapy aimed at the CLL component are significant in the management of patients with concurrent CLL and AML.

关键词： Acute myeloid leukemia Chronic lymphocytic leukemia B-cell lymphoma-2 inhibitors Therapy Ten-eleven translocation-2 Case report

Update Knowledge Assessment and Influencing Predictor of Female Fertility Preservation in Oncologists

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Current Medical Science 2022年第4期42卷 824-831页

作者： li-xia zhu Lei JIN Jing-hang JIANG liu YANG Zi-shui FANG Meng WANG Ying xiaO Qing-song XI Reproductive Medicine Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Reproductive Medicine Center Jingmen Second People's HospitalJingmen 448000China Cancer Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:This study aims to offer an update assessment of the knowledge of Chinese oncologists on female fertility preservation,and identify the determinants that influence the implementation of fertility ***:A total of 713 Chinese oncologists with different specialties completed the online self-report questionnaire to assess their understanding of fertility risks in cancer treatment,knowledge on female fertility preservation,and perceptions on the barriers in referring patients for fertility ***:Although most oncologists were familiar with fertility risk in cancer treatment,half of them lacked the knowledge for reproduction and preservation *** the multivariable model,oncologists in a hospital with a specialized reproductive institution,positive precaution for fertility risk,and fertility preservation discussion with patients were significantly correlated with the possibility of fertility preservation ***:The intervention targets based on the update evaluation and identified influencing determinants will be helpful for all the oncofertility researchers,oncologists and institutions in future efforts for well-established female fertility preservation services.

关键词： fertility preservation oncologists female infertility neoplasms