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  1. Article ; Online: Carbonylative Synthesis of Fused Quinoxalinones via Palladium-Catalyzed Cascade Cyclization of 2-Heteroaryl Iodobenzene and NaN

    Song, Yufei / Quan, Zhaolin / Chen, Zhengkai / Wu, Xiao-Feng

    Organic letters

    2023  Volume 25, Issue 21, Page(s) 3984–3988

    Abstract: ... catalyzed cascade carbonylative cyclization of 2-heteroaryl iodobenzene and NaN ...

    Abstract A facile and straightforward approach for the synthesis of fused quinoxalinones via palladium-catalyzed cascade carbonylative cyclization of 2-heteroaryl iodobenzene and NaN
    Language English
    Publishing date 2023-05-24
    Publishing country United States
    Document type Journal Article
    ISSN 1523-7052
    ISSN (online) 1523-7052
    DOI 10.1021/acs.orglett.3c01466
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Metallogeny of the Yi’nan Tongjing Au–Cu skarn deposit, Luxi district, North China Craton

    Wen-Yan Cai / Zhao-Lu Zhang / Xiao Liu / Ji-Lei Gao / Ming Ma / Yadong Li / Ying-Xin Song / Zeng-Sheng Li

    Frontiers in Earth Science, Vol

    Perspective from in-suit trace elements, sulfur and lead isotopes of sulfides

    2023  Volume 10

    Abstract: ... hydrothermal processes. The Yi’nan Tongjing Au–Cu deposit is located in the central part of the Luxi district ... of shallow crustal material. The Yi’nan Tongjing Au–Cu skarn deposit was formed in the ... ...

    Abstract Gold–Cu skarn deposits are characterized by a diverse mineral assemblage, whose in-situ major/trace elements and isotope compositions can provide key constraints to the migration and enrichment of Au during hydrothermal processes. The Yi’nan Tongjing Au–Cu deposit is located in the central part of the Luxi district, and both skarn and Au–Cu ore bodies occur at the contact between the Early Cretaceous diorite porphyry and the Neoproterozoic to Cambrian carbonate rocks. Five stages of mineralization were identified: 1) early skarn (garnet–diopside–wollastonite); 2) late skarn (magnetite–epidote–actinolite±tremolite); 3) oxide (specularite–hematite); 4) sulfide (pyrite–chalcopyrite–sphalerite–quartz–chlorite); and 5) late quartz–calcite. The mineralization process in the Tongjing Au-Cu deposit was revealed by detailed scanning electron microscope-backscattered electron imaging, electron probe microanalysis, in-situ trace element, sulfur and lead isotope analysis. Magnetite is enriched in chalcophile elements (Cu, Zn, Pb), Co and Ni, probably due to hydrothermal overprint. The substitution of As and other elements in the formation of pyrite is conducive to the entry of Au into pyrite. The increase of Se and As contents in pyrite from stage IVa to IVb indicates that the temperature, salinity and oxygen fugacity of the ore-forming fluid decrease while the pH rises, resulting in the unloading of Au. The temperature of Au mineralization based on the Se content in pyrite does not exceed 300°C. Furthermore, V positively correlated with Ti and Ni/Cr ratios ≥1 in magnetite and most Co/Ni ratios in pyrite >10 all confirm their hydrothermal origins. The restricted sulfur (δ34SV-CDT = −0.5–1.2‰; mean = 0.4‰) and lead (206Pb/204Pb = 17.323–17.383; 207Pb/204Pb = 15.424–15.452; 208Pb/204Pb = 37.367–37.454) isotopic compositions suggest that the deep magma provided the primary mineralized material, accompanied by a relatively small amount of shallow crustal material. The Yi’nan Tongjing Au–Cu skarn deposit was formed in the ...
    Keywords in-situ trace elements analyses ; in-situ sulfur and lead isotopes ; Au precipitation mechanism ; Yi’nan Tongjing ; skarn deposit ; Luxi district ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Palladium-Catalyzed Cascade Carbonylative Synthesis of 1,2,4-Triazol-3-ones from Hydrazonoyl Chlorides and NaN

    Du, Shiying / Wang, Wei-Feng / Song, Yufei / Chen, Zhengkai / Wu, Xiao-Feng

    Organic letters

    2021  Volume 23, Issue 3, Page(s) 974–978

    Abstract: A palladium-catalyzed three-component carbonylative reaction for the synthesis of ... ...

    Abstract A palladium-catalyzed three-component carbonylative reaction for the synthesis of 3
    Language English
    Publishing date 2021-01-12
    Publishing country United States
    Document type Journal Article
    ISSN 1523-7052
    ISSN (online) 1523-7052
    DOI 10.1021/acs.orglett.0c04167
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Transcriptome-Wide m6A Analysis Provides Novel Insights Into Testicular Development and Spermatogenesis in Xia-Nan Cattle.

    Liu, Shen-He / Ma, Xiao-Ya / Yue, Ting-Ting / Wang, Zi-Chen / Qi, Kun-Long / Li, Ji-Chao / Lin, Feng / Rushdi, Hossam E / Gao, Yu-Yang / Fu, Tong / Li, Ming / Gao, Teng-Yun / Yang, Li-Guo / Han, Xue-Lei / Deng, Ting-Xian

    Frontiers in cell and developmental biology

    2021  Volume 9, Page(s) 791221

    Abstract: Testis is the primary organ of the male reproductive tract in mammals that plays a substantial role in spermatogenesis. Improvement of our knowledge regarding the molecular mechanisms in testicular development and spermatogenesis will be reflected in ... ...

    Abstract Testis is the primary organ of the male reproductive tract in mammals that plays a substantial role in spermatogenesis. Improvement of our knowledge regarding the molecular mechanisms in testicular development and spermatogenesis will be reflected in producing spermatozoa of superior fertility. Evidence showed that N6-Methyladenosine (m6A) plays a dynamic role in post-transcription gene expression regulation and is strongly associated with production traits. However, the role of m6A in bovine testis has not been investigated yet. In this study, we conducted MeRIP-Seq analysis to explore the expression profiles of the m6A and its potential mechanism underlying spermatogenesis in nine bovine testes at three developmental stages (prepuberty, puberty and postpuberty). The experimental animals with triplicate in each stage were chosen based on their semen volume and sperm motility except for the prepuberty bulls and used for testes collection. By applying MeRIP-Seq analysis, a total of 8,774 m6A peaks and 6,206 m6A genes among the studied groups were identified. All the detected peaks were found to be mainly enriched in the coding region and 3'- untranslated regions. The cross-analysis of m6A and mRNA expression exhibited 502 genes with concomitant changes in the mRNA expression and m6A modification. Notably, 30 candidate genes were located in the largest network of protein-protein interactions. Interestingly, four key node genes (
    Language English
    Publishing date 2021-12-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2737824-X
    ISSN 2296-634X
    ISSN 2296-634X
    DOI 10.3389/fcell.2021.791221
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Transcriptome-Wide m6A Analysis Provides Novel Insights Into Testicular Development and Spermatogenesis in Xia-Nan Cattle

    Shen-he Liu / Xiao-ya Ma / Ting-ting Yue / Zi-chen Wang / Kun-long Qi / Ji-chao Li / Feng Lin / Hossam E. Rushdi / Yu-yang Gao / Tong Fu / Ming Li / Teng-yun Gao / Li-guo Yang / Xue-lei Han / Ting-xian Deng

    Frontiers in Cell and Developmental Biology, Vol

    2021  Volume 9

    Abstract: Testis is the primary organ of the male reproductive tract in mammals that plays a substantial role in spermatogenesis. Improvement of our knowledge regarding the molecular mechanisms in testicular development and spermatogenesis will be reflected in ... ...

    Abstract Testis is the primary organ of the male reproductive tract in mammals that plays a substantial role in spermatogenesis. Improvement of our knowledge regarding the molecular mechanisms in testicular development and spermatogenesis will be reflected in producing spermatozoa of superior fertility. Evidence showed that N6-Methyladenosine (m6A) plays a dynamic role in post-transcription gene expression regulation and is strongly associated with production traits. However, the role of m6A in bovine testis has not been investigated yet. In this study, we conducted MeRIP-Seq analysis to explore the expression profiles of the m6A and its potential mechanism underlying spermatogenesis in nine bovine testes at three developmental stages (prepuberty, puberty and postpuberty). The experimental animals with triplicate in each stage were chosen based on their semen volume and sperm motility except for the prepuberty bulls and used for testes collection. By applying MeRIP-Seq analysis, a total of 8,774 m6A peaks and 6,206 m6A genes among the studied groups were identified. All the detected peaks were found to be mainly enriched in the coding region and 3′- untranslated regions. The cross-analysis of m6A and mRNA expression exhibited 502 genes with concomitant changes in the mRNA expression and m6A modification. Notably, 30 candidate genes were located in the largest network of protein-protein interactions. Interestingly, four key node genes (PLK4, PTEN, EGR1, and PSME4) were associated with the regulation of mammal testis development and spermatogenesis. This study is the first to present a map of RNA m6A modification in bovine testes at distinct ages, and provides new insights into m6A topology and related molecular mechanisms underlying bovine spermatogenesis, and establishes a basis for further studies on spermatogenesis in mammals.
    Keywords cattle ; testis ; m6A modification ; spermatogenesis ; semen quality ; sequencing ; Biology (General) ; QH301-705.5
    Subject code 572
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: New secondary metabolites from the endophytic fungus Fusarium sp. HP-2 isolated from "Qi-Nan" agarwood.

    Xiao, Wen-Jie / Chen, Hui-Qin / Wang, Hao / Cai, Cai-Hong / Mei, Wen-Li / Dai, Hao-Fu

    Fitoterapia

    2018  Volume 130, Page(s) 180–183

    Abstract: ... Fusarium sp. HP-2, which was isolated from "Qi-Nan" agarwood. The structures of the new compounds were ...

    Abstract A novel pyrone derivative (1) bearing two fused five-member rings, together with two new naphthalenone derivatives (2, 3), as well as two known compounds (4, 5) were obtained from the endophytic fungus Fusarium sp. HP-2, which was isolated from "Qi-Nan" agarwood. The structures of the new compounds were elucidated by analysis of 1D and 2D NMR, and by HRESIMS spectra, as well as by comparison with the literature. Bioactivity results indicated that compound 3 showed weak acetylcholinesterase inhibitory activity.
    MeSH term(s) Cell Line, Tumor ; Cholinesterase Inhibitors/isolation & purification ; Endophytes/chemistry ; Fusarium/chemistry ; Humans ; Microbial Sensitivity Tests ; Molecular Structure ; Naphthalenes/isolation & purification ; Pyrones/isolation & purification ; Secondary Metabolism ; Thymelaeaceae/microbiology ; Wood/microbiology
    Chemical Substances Cholinesterase Inhibitors ; Naphthalenes ; Pyrones
    Language English
    Publishing date 2018-08-24
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 412385-2
    ISSN 1873-6971 ; 0367-326X
    ISSN (online) 1873-6971
    ISSN 0367-326X
    DOI 10.1016/j.fitote.2018.08.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: [Analysis of epidemiological characteristics of advanced schistosomiasis in Hu-nan province, 2012].

    Liu, Zhao-chun / Xiao, Shui-yuan / Zhou, Jie / Yu, Xin-ling / Hu, Ben-jiao / Zhu, Jin-hua / Li, Yue-sheng

    Zhongguo xue xi chong bing fang zhi za zhi = Chinese journal of schistosomiasis control

    2014  Volume 26, Issue 2, Page(s) 148–152

    Abstract: Objective: To understand the epidemiological characteristics of patients with advanced schistosomiasis in Hunan Province, so as to provide the evidence for formulating the advanced schistosomiasis prevention strategies and measures.: Methods: The ... ...

    Abstract Objective: To understand the epidemiological characteristics of patients with advanced schistosomiasis in Hunan Province, so as to provide the evidence for formulating the advanced schistosomiasis prevention strategies and measures.
    Methods: The data of advanced schistosomiasis patients were collected and analyzed retrospectively with the cross section research method and description method in Hunan Province, 2012.
    Results: There were 5 722 advanced schistosomiasis patients in Hunan Province, and among them, 4 112 patients were male (71.86%), and 1610 were female (28.14%). Totally 5311 patients came from the schistosomiasis endemic areas (92.82%) and 411 patients from non-schistosomiasis endemic areas (7.18%). The prevalence rate of advanced schistosomiasis was 8.46/10,000. The mean age of advanced schistosomiasis patients was 60.30 +/- 11.63 years, and the youngest was 17 years old and the oldest 92 years old. In the age composition of advanced schistosomiasis patients, the greatest number of cases was in the 60-70 years age group (32.72%). There were 3 595 cases of ascites type (62.83%), 2107 cases of splenomegaly type (36.82%), 11 cases of dwarf type (0.16%), and 11 cases of colon proliferation type (0.35%).
    Conclusion: The prevalence rate of advanced schistosomiasis is relatively stable in Hunan Province, and the age of the patients showed an old aging trend. The salvation of advanced schistosomiasis patients in non-endemic areas should be strengthened.
    MeSH term(s) Adult ; Age Distribution ; Aged ; Aged, 80 and over ; China/epidemiology ; Disease Progression ; Educational Status ; Female ; Humans ; Male ; Middle Aged ; Schistosomiasis/epidemiology ; Sex Distribution
    Language Chinese
    Publishing date 2014-04
    Publishing country China
    Document type English Abstract ; Journal Article
    ISSN 1005-6661
    ISSN 1005-6661
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Variability of pesticide residues in vegetables from the marketplaces in Ji’nan City

    Song Yufeng, Shandong Academy of Agricultural Science, Tai'an(China) / Lü Xiao, Shandong Academy of Agricultural Science, Tai'an(China) / Ren Fengshan, Shandong Academy of Agricultural Science, Tai'an(China)

    China Agriculture Science

    Apr. 2010  , Issue (7)

    Abstract: 目的】研究济南市售蔬菜中农药残留污染状况,探讨其变异性并获得其变异因子,为准确评估蔬菜农药残留膳食摄入风险提供技术支持。【方法】应用统计学方法分析农药残留的污染水平;在JMPR建议原则指导下,采用Harrell-Davis法获得残留的变异因子,并对计算结果及过程进行验证。【结果】济南市售蔬菜中8种常用农药残留检出率均在20%之内,超标率较低（0.6%）,检出率最高的残留和蔬菜分别是百菌清和叶菜类蔬菜,变异因子与农药残留平均浓度的关系可用 表达。【结论】济南市售蔬菜中农药残留污染较轻, ... ...

    Abstract 【目的】研究济南市售蔬菜中农药残留污染状况,探讨其变异性并获得其变异因子,为准确评估蔬菜农药残留膳食摄入风险提供技术支持。【方法】应用统计学方法分析农药残留的污染水平;在JMPR建议原则指导下,采用Harrell-Davis法获得残留的变异因子,并对计算结果及过程进行验证。【结果】济南市售蔬菜中8种常用农药残留检出率均在20%之内,超标率较低（0.6%）,检出率最高的残留和蔬菜分别是百菌清和叶菜类蔬菜,变异因子与农药残留平均浓度的关系可用 表达。【结论】济南市售蔬菜中农药残留污染较轻,其变异因子普遍高于JMPR建议值,但低于英国急性评估中采用的默认值。
    Keywords VEGETABLES ; PESTICIDES ; RESIDUES ; LEGUME ; PESTICIDE ; RESIDU ; HORTALIZAS ; PLAGUICIDAS ; RESIDUOS ; http://www.fao.org/aos/agrovoc#c_8174 ; http://www.fao.org/aos/agrovoc#c_5739 ; http://www.fao.org/aos/agrovoc#c_6518
    Language zho
    Document type Article
    ISSN 0578-1752
    Database AGRIS - International Information System for the Agricultural Sciences and Technology

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  9. Article: The Structure and interspecific correlation of machilus chinensis community in Nan＇ao island,Guangdong

    Peng Jianhua, Shantou Forestry Research Institute, Shantou(China) / Xiao Zexin, Shantou Forestry Research Institute, Shantou(China) / Zhan Chaoan, Shantou Forestry Research Institute, Shantou(China)

    Journal of South China Agricultural University

    Oct. 2010  , Issue (4)

    Abstract: 基于广东南澳岛中华楠Machilus chinensis群落调查,分析了群落的结构特征、物种多样性和种间相关性.结果表明,1 400 m2的样地中,共有维管束植物45种,隶属29科39属.群落的主要优势树种为中华楠、台湾相思Acaciaconfusa、鸭脚木Schefflera octophylla,整个群落的Shannon-Wiener多样性指数、Margalef丰富度指数及Pielou均匀度指数均表现为灌木层〉乔木层〉草本层.16个乔木层优势树种的Pearson相关系数检验中有9个种对存在显著相关.[ ...

    Abstract 基于广东南澳岛中华楠Machilus chinensis群落调查,分析了群落的结构特征、物种多样性和种间相关性.结果表明,1 400 m2的样地中,共有维管束植物45种,隶属29科39属.群落的主要优势树种为中华楠、台湾相思Acaciaconfusa、鸭脚木Schefflera octophylla,整个群落的Shannon-Wiener多样性指数、Margalef丰富度指数及Pielou均匀度指数均表现为灌木层〉乔木层〉草本层.16个乔木层优势树种的Pearson相关系数检验中有9个种对存在显著相关.[著者文摘]
    Keywords PERSEA ; BIOLOGICAL COMPETITION ; GUANGDONG ; PERSEA ; COMPETITION BIOLOGIQUE ; GUANGDONG ; PERSEA ; COMPETENCIA BIOLOGICA ; GUANGDONG ; http://www.fao.org/aos/agrovoc#c_5722 ; http://www.fao.org/aos/agrovoc#c_917 ; http://www.fao.org/aos/agrovoc#c_3411
    Language zho
    Document type Article
    ISSN 1001-411X
    Database AGRIS - International Information System for the Agricultural Sciences and Technology

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  10. Book: Nan nü sheng zhi xi ji xing

    Xiao, Fengyun

    1990  

    Title translation Abnormalities in reproductive systems of male and female.
    Author's details Xiao Fengyun bian zhu
    MeSH term(s) Genitalia, Female/abnormalities ; Genitalia, Male/abnormalities
    Language Chinese
    Size 4, 234 p. :, ill.
    Edition Di 1 ban.
    Publisher Ren min wei sheng chu ban she
    Publishing place Beijing Shi
    Document type Book
    ISBN 9787117013376 ; 7117013370
    Database Catalogue of the US National Library of Medicine (NLM)

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