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11篇 您的检索式:作者名="Dongfa"
    题名 作者 年代 出处 被引量
1Multielement Analysis of Deep-Sea Sediments by Inductively Coupled Plasma Mass Spectrometry显示文摘Marine sediments were dissolved by HNO3-HF-HClO4 in a sealed container at low pressure; HF was evaporated in an open container and salts were dissolved in HCl by heating, then transferred to 2% HNO3 solution. A total of 45 elements, including Li, Be, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Rb, Sr, Y, Zr, Nb, Mo, Cd, In, Sb, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Tl, Pb, Bi, Th and U, were measured by inductively coupled plasma mass spectrometry (ICP-MS). Condi- tions and sample experiments showed that this procedure defines a good experimental method which has the advantages of clear interference, easy operation and reliable results. The concentrations of the 45 elements could be used for resource exploration, envi- ronmental assessment and academic research.XIA Ning WU Zhaohui GUO Dongfa YAO De 2008Journal of Ocean University of China2008,7,2:4
2The Latest In-Situ Uraninite U-Pb Age of the Guangshigou Uranium Deposit, Northern Qinling Orogen, China: Constraint on the Metallogenic Mechanism显示文摘Objective The Guangshigou uranium deposit is located in the eastern part of the Shangdan triangular domain,which is currently the most productive pegmatite-hosted uranium deposit in China.Previous studies have focused on the migration and precipitation of uraninite and biotite clusters in the uraniferous pegmatites (Li Yanhe et al.,2016;Yuan et al.,2018).However,the accurate uranium mineralization age still remains poorly constrained,thus hindering the understanding of the origin of the uranium mineralization.This study conducted in-situ LA-ICP-MS U-Pb dating on uraninite to obtain a robust mineralization age for the Guangshigou deposit,and interpreted the relationship between granitic magma evolution and uranium mineralization.WU Yong QIN Mingkuan GUO Dongfa FAN Guang LIU Zhangyue GUO Guolin 2018Acta Geologica Sinica(English Edition)2018,92,6:4
3Development of gene-specific markers for acid soil/aluminium tolerance in barley ( Hordeum vulgare L.)显示文摘Miao Bian Irene Waters Sue Broughton Xiao-Qi Zhang Meixue Zhou Reg Lance Dongfa Sun Chengdao Li 2013Molecular Breeding2013,,1:1
4Multielement analysis of deep sea ferromanganese nodules by ICPMS显示文摘 Xia Ning Guo Dongfa 2003Marine Georesources and Geotechnology2003,21,2:1
5Dynamical behaviors of nonlinear viscoelastic thick plates with damage 显示文摘Sheng Dongfa Cheng Changiun 2004International Journal of Solids and Structures2004,,41:1
6Molecular approaches unravel the mechanism of acid soil tolerance in plants显示文摘Acid soil is a worldwide problem to plant production. Acid toxicity is mainly caused by a lack of essential nutrients in the soil and excessive toxic metals in the plant root zone. Of the toxic metals, aluminum(Al) is the most prevalent and most toxic. Plant species have evolved to variable levels of tolerance to aluminum enabling breeding of high Al-tolerant cultivars.Physiological and molecular approaches have revealed some mechanisms of Al toxicity in higher plants. Mechanisms of plant tolerance to Al stress include: 1) exclusion of Al from the root tips, and 2) absorbance, but tolerance of Al in root cells. Organic acid exudation to chelate Al is a feature shared by many higher plants. The future challenge for Al tolerance studies is the identification of novel tolerance mechanisms and the combination of different mechanisms to achieve higher tolerance. Molecular approaches have led to significant progress in explaining mechanisms and detection of genes responsible for Al tolerance.Gene-specific molecular markers offer better options for marker-assisted selection in breeding programs than linked marker strategies. This paper mainly focuses on recent progress in the use of molecular approaches in Al tolerance research.Miao Bian Meixue Zhou Dongfa Sun Chengdao Li 2013The Crop Journal2013,1,2:1
7The effects of nutrients and heavy metals on the plankton in marine enclosed ecosystem显示文摘Applying marine enclosed ecosystem extensively to study the nutrient variation and its relation to biochemical process by marine ecologists and biogeologists in North America, Europe, Japan and Australia has been lasting for many years. Santschi (1982) reviewed the geochemical recirculation of nutrients systematically. Kremling et al. (1978) described the changes in nutrient in marine enclosed e-Zhuang Dongfa, Lin YuThird Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China 1991Acta Oceanologica Sinica1991,10,4:0
8Effects of diesel oil on the polychaete Annelida in model benthic ecosystem显示文摘EffectsofdieseloilonthepolychaeteAnnelidainmodelbenthicecosystem¥TangSenming;ChenXiaolin;ZhuangDongfa;WuShengsan;LinYu;CaiZip...Tang Senming Chen Xiaolin Zhuang Dongfa Wu Shengsan Lin Yu Cai Ziping and Zheng Fengwu(This project was supported by the National Natural Science Foundation of China.(Third Institute of oceanography, State Oceanic Administration,Xiamen 361005, China) 1994Acta Oceanologica Sinica1994,13,3:0
9Growth Kinetics of γ′ Particles in Incoloy 907显示文摘The kinetics of growth of the γ’ precipitate in an lncoloy 907 alloy have been studied. The kinetics of particle growth obeyed the tirne law predicted by the Lifshitz-Wagner theory. The distribution of γ’particle sizes was found to be significantly broader than the theoretical distribution of LifshitZ-Wagner theory. It is suggested that this is due to the relatively large lattice parameter mismatch between γ’ and the Fe-Ni-CoXu ZHAO Dongfa LI Ke YANG Cungan FAN and Yiyi LI (Institute of Metal Research, Academia Sinica, Shenyang, 110015, China)(To whom correspondence should be addressed) 1994Journal of Materials Science & Technology1994,10,2:0
10Structures of ovary and ovarian follicle in flathead lobster,Thenus orientalis (Lund, 1793) (Crustacea: Decapoda: Scyllarida)显示文摘The ovary contains four morphological components: (1) the ovarian wall, (2) the reproductive epithelium, (3) the cellular layer containing oocytes, oogonia (especially for early-developing ovary) and follicle cells, and (4) the extensions of the ovarian wall. The ovarian wall and its extensions consist of blood vessels, sinuses, muscle cells and others. The extensions of the ovarian wall project into among the follicles and insert on the thick basal membrane of each follicle. From inside to outside, the follicles are composed of four parts: (1) the oocyte, (2) the perivitelline space, (3) the follicle cells, and (4) the basal membrane. The surface of the oocyte during vitellogenesis is folded into numerous long microvilli that project into the perivitelline space between the oocyte surface and the bace of the follicle cell layer. In addition, the plasma membrane of the vitellogenic oocyte contains many pinocytotic pits. The perivitelline space is engorged with with more electron- denser material as the development of the follicle. The inclusion of perivitelline space in the mature follicle is named specially as the chorine. The chorion is composed of two region, a thinner exochorion and a thicker endochorion containing electron-dense granular material. The follicle cell layer is composed of a single layer of polygonal follicle cells which exhibit higher synthetic activity. The synthetic product of the follicle cell layer is one scarce for the inclusion of the perivitelline space. The structures of the ovary and ovarian follicle in T. orientalis show that the exogenously biosyn- thetic yolk plays important roles in the vitellogenesis.Zhu Dongfa, Li Shaojing, Wang Guizhong (1. Department of Oceanography, Xiamen University, Xiamen 361005, China 2. Faculty of Life Science and Biotechnology, Ningbo University, Ningbo 315211, China) 2001Acta Oceanologica Sinica2001,20,2:0
11Recombination and mutation shape variations in the major histocompatibility complex显示文摘The major histocompatibility complex(MHC)is closely associated with numerous diseases,but its high degree of polymorphism complicates the discovery of disease-associated variants.In principle,recombination and de novo mutations are two critical factors responsible for MHC polymorphisms.However,direct evidence for this hypothesis is lacking.Here,we report the generation of fine-scale MHC recombination and de novo mutation maps of~5 Mb by deep sequencing(>100×)of the MHC genome for 17 MHC recombination and 30 non-recombination Han Chinese families(a total of 190 individuals).Recombination hotspots and Han-specific breakpoints are located in close proximity at haplotype block boundaries.The average MHC de novo mutation rate is higher than the genome-wide de novo mutation rate,particularly in MHC recombinant individuals.Notably,mutation and recombination generated polymorphisms are located within and outside linkage disequilibrium regions of the MHC,respectively,and evolution of the MHC locus was mainly controlled by positive selection.These findings provide insights on the evolutionary causes of the MHC diversity and may facilitate the identification of disease-associated genetic variants.Yuying Sun Fang Yuan Ling Wang Dongfa Dai Zhijian Zhang Fei Liang Nan Liu Juan Long Xiao Zhao Yongzhi xi 2022Journal of Genetics and Genomics2022,49,12:0
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