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genetic classification of Pyroclastic Ejecta Based on Physical Volcanology of Possible Large Cauldron in Bombay Volcanic Complex, Western Deccan Trap Province, India

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Open Journal of Geology 2023年第3期13卷 221-268页

作者： Rajendra Kumar Sharma A-55 Anand Vihar Jagatpura Jaipur India

Many Propositions are made about the mechanism of emplacement of volcanoclastic material in the Bombay volcanic complex. The present paper deals exclusively with the physical features of the deposits laid by a complex tectono-magmatic process by making detailed inventory of the different kind of volcanic ejecta exposed in the Bomay Volcanic Complex (BVC), and an attempt has been made to classify the deposits genetically. A subsidenace which was hinted at earlier, may be a possible cauldron in BVC has been proposed, which might be responsible for producing such a varied and complex lithology.

关键词： Bombay Volcanic Complex Western Deccan Province Physical Volacanology genetic classification Pyroclastic Ejecta Cauldron

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Evaluation and genetic classification of Rice Germplasm Resources Resistant to Rice Blast

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Agricultural Biotechnology 2014年第2期3卷 1-6,46页

作者： Yuanyuan NIE Zhengshuai An Zhen ZHANG Linghua MAO Guolan LIU Manlian YAN Yaohui CAI Jiangxi Super-rice Research and Development Center / National Engineering Laboratory for Rice Shanghai Agriobiological Gene Center

[ Objective] This study aimed to explore rice germplasm resources resistant to rice blast and provide theoretical basis for the modification of rice blast- resistant germplasm resources. [ Method] The resistance of 120 rice materials to rice blast was identified at three experimental areas. [ Result] The resistance of 120 experimental materials was at grade 0 -9 to panicle blast in Hainan Province, at grade 0 -9 to seedling blast in Fujian Province and at grade 3 -9 topanicle blast in Guangxi Zhuang Autonomous Region. Analysis of correlations between agronomic traits and rice blast resistance indicated that the resistance of experimental materials could not be simply determined based on agronomic traits. Furthermore, 61 published SSR makers closely linked to rice blast were selected and synthe- sized for genotypic analysis of 120 experimental materials. The results of cluster analysis preliminarily divided 120 germplasms into resistant varieties and susceptible varieties. [ Conclusion] These rice germplasm resources are of important value for breeding new materials resistant to rice blast.

关键词： Rice Germplasm resources Rice blast Resistance genetic classification

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classification of Sandstone-Related Uranium Deposits

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Journal of Earth Science 2022年第2期33卷 236-256页

作者： Michel Cuney Julien Mercadier Christophe Bonnetti Universitéde Lorraine GéoRessourcesCNRSCREGUNancy F54500France 2.State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchang 330013China

Sandstone type deposits are the most common type of uranium deposits in the world.A large variety of sub-types have been defined,based either on the morphology of the deposits(e.g.,tabular,roll front,etc),or on the sedimentological setting(e.g.,paleovalley,paleochannel,unconformity),or on tectonic or lithologic controls(e.g.,tectonolithologic,mafic dykes/sills),or still on a variety of others characteristics(phreatic oxidation type,interlayer permeable type,multi-element stratabound infiltrational,solution front limb deposit,humate type,etc.),reflecting the diversity of the characteristics of these deposits,but making it difficult to have a clear overview of these ***,uranium deposits occurring in the same sedimentological setting(e.g.,paleochannel),presenting similar morphologies(e.g.,tabular),may result from different genetic mechanisms and thus can be misleading for exploration *** aim of the present paper is to propose a new view on sandstone-related uranium deposits combining both genetic and descriptive *** dual view is indeed of primordial importance because all the critical characteristics of each deposit type,not limited to the morphology/geometry of the ore bodies and their relationships with depositional environments of the sandstone,have to be taken into account to propose a comprehensive classification of uranium *** this respect,several key ore-forming processes,like the physical-chemical characteristics of the mineralizing fluid,have to be used to integrate genetic aspects in the *** a succession of concentration steps,potentially temporally-disconnected,are involved in the genesis of some uranium mineralization,the classification here proposed will focus on the main mechanisms responsible for the formation and/or the location of ore *** objective of this paper is also to propose a robust and widely usable terminology to define and categorize sandstone uranium deposits,considering

关键词： sandstone uranium genetic classification redox control depositional environment fluids ore deposit geology

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Isolation and genetic Analysis of Halophilous Bacteria from Marine Sediment Collected at Tianjin Port, China

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Agricultural Science & Technology 2018年第5期19卷 50-58页

作者： ZHANG Guo-gang LIU Cheng-bao JIA Mei-qing HUANG Jing XIE Li-na YIN Xue SUI Xin College of Life Sciences Tianjin Normal UniversityTianjin 300387PRC Tianjin Key Laboratory of Animal and Plant Resistance Tianjin Normal UniversityTianjin 300387PRC Key laboratory of water resource and environment Tianjin Normal UniversityTianjin 300387PRC

[Objective] Marine sediment from Tianjin Port has a extremely high *** bacteria which live in such habitats have evolved distinct physiological,metabolic,and morphological characteristics to *** objective of this study is to identify all the specific salt-tolerant characteristics and the genetic evolution of the bacteria in the sediment.[Methods] In this study,the total DNA of sediment from Tianjin Port was extracted,and 16S rDNA was used to conduct an analysis of the fauna of sediment bacteria. We also isolated sediment bacteria using beef extract-peptone media with seven different NaCl concentrations (0,0.5%,2%,5%,10%,15%,and 20%),aiming to analyze the dominant species of halophilous bacteria under different salinities.[Results] 1) With each stepwise increase of salinity from 0.5% to 20%,the total number of isolated bacterial colonies decreased.14 strains of bacteria were identified and classified by the16S rDNA sequencing *** these,four could tolerate 0~2% salinity,four could tolerate 0~5% salinity,one could tolerate 0~15% salinity,and one tolerated within the full 0~20% salinity *** four strains were only able to tolerate within a few narrow salinity *** as 5%~10%,10%~15%,10%~20% and 15%~20%;2) The quantity of bacteria strains that can be isolated from the marine sediment decreased with the increase of salinity. Also, the Shannon wiener index and species richness index of marine sediment bacteria decreased significantly from 5% ***,there were no significant differences in the species evenness index;3) When the salinity was 0~10%,the dominant species was *** the salinity was 15%, Halomonas was the dominant *** the salinity was 20%,there were no significant differences in the proportions of these species.[Conclusion] Our results showed that some bacteria could tolerate living conditions with high salinity,and we even found a species which can tolerate a wide range of salinities (0~20%).In f

关键词： Bacteria Marine sediment 16S rDNA gene sequence Salttolerance genetic classification

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