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| 1 | Geochemistry and petrogenesis of Quaternary volcanism from the islets in the eastern Beibu Gulf: evidence for Hainan plume显示文摘Some of the islets in the eastern Beibu Gulf are covered by Quaternary volcano strata.The rock samples from these islets mainly consist of quartz tholeiites(at Shenjiandao),olivine tholeiites(at Linshidao and Xieyangdao)and alkali basalts(at Yangpubi and Jianshidao),and basically represent four periods of the Quaternary volcanism of Hainan Island and its adjacent regions.Except for the samples from Shenjiandao,most of the Quaternary volcanics of these islets belong to alkali magma series.The trace element characteristics of all of these samples show they are OIB(oceanic island basalt)-like,which implies that their deep geodynamic setting may be related to a mantle plume.The Sr-Nd-Pb isotopic compositions show that the mantle source beneath the Quaternary strata can be regarded as a result of binary mixing between a depleted,DMM(depleted MORB mantle)-like source and an enriched mantle type 2(EM2).The EM2 may be originated from the Hainan mantle plume,and has been metasomatized by carbonaceous fluids released from ancient recycled oceanic crust at an asthenospheric mantle level.These features,together with typical trace element ratios,reflect that the parent magma was not subjected to crustal contamination during its ascent to the surface.This study provides further petrological and geochemical evidence for the existence of the Hainan mantle plume. | LI Naisheng YAN Quanshu CHEN Zhihua SHI Xuefa | 2013 | Acta Oceanologica Sinica2013，32，12： | 7 |
| 2 | The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6°E显示文摘Massive sulfide precipitates found in the Southwest Indian Ridge(SWIR) 49.6°E hydrothermal field are enriched in gold.Here,the mineralogy and mineral chemistry of these massive sulfides to constrain the process of gold precipitation were studied.Sulfide samples in this field include lowertemperature Zn-rich sulfides and relative higher-temperature Fe-rich sulfides.Zn-rich sulfides are dominated by sphalerite-pyrite-chalcopyrite assemblages,with concentrations of gold ranging from 9.08 to 17.0 μg/g.Fe-rich sulfides consist mainly of pyrite-marcasite-isocubanite assemblages,with gold concentrations from 2.17 to 3.79 μg/g.The significant enrichment in gold within the lowertemperature Zn-rich sulfides and the effective separation of Zn and Fe in hydrothermal precipitates at the surface of this field are here interpreted to reflect the strong temperature dependence of gold transportation and deposition within the sulfides.In Zn-rich samples,large amounts of isolated native gold grains were identified.They were found mainly as inclusions up to 8 μm in diameter,occupying porous cavities in sphalerite or in the elevated iron content rim of sphalerite.The fineness of the gold ranged from 810 to 830.Unlike previously published results on other hydrothermal fields,these data show a low gold fineness values in SWIR 49.6°E.The FeS content of sphalerite associated with gold grains ranged from 3.2 mole % to 18.9 mole %.This was higher than in other fields,indicating that the sulfur activity is relatively low during the gold precipitation process and that sulfur activity may be one of the main factors affecting gold fineness in the SWIR 49.6°E hydrothermal field.Evidence regarding gold fineness and sulfur activity suggests that gold was quite likely transported as AuHS0 rather than as a Au(HS)-2 complex. | YE Jun SHI Xuefa YANG Yaomin LI Naisheng LIU Jihua SU Wenchao | 2012 | Acta Oceanologica Sinica2012，31，6： | 7 |
| 3 | Phytochemical Analysis of Ziziphus jujuba Leaves in Six Cultivars at the Whole Life Stage by High Performance Liquid Chromatography显示文摘 | CUI Xueqin MA Zhongxiao BAI Lu WU Yong GUO Sen LIU Qingchao ZHANG Li HO Chi-Tang BAI Naisheng | 2017 | Chemical Research in Chinese Universities2017，33，5： | 2 |
| 4 | Structural characterization and antioxidant activity of a novel heteropolysaccharide from the submerged fermentation mycelia of Ganoderma capense显示文摘 | Huang Yating Li Naisheng Wan Jianbo | 2015 | Carbohydrate Polymers2015，134，： | 1 |
| 5 | First-principle prediction of half-metallic properties for the Heusler alloys V 2 YSb (Y显示文摘 | Naisheng Xing Yuhua Gong Wei Zhang Jianmin Dong Hua Li | 2008 | Computational Materials Science2008，，2： | 1 |
| 6 | Neuregulin-1 therapy improved cardiac function and reduced ANPmRNA expression in post myocardial infarction rats with cardiac dysfunction显示文摘To observe the influence of neuregulin-1 on the cardiac function of post-myocardial infarction rats. Methods Left ventricular MI was created in Sprague-Dawley rats by ligation of the left anterior descending coronary. Six months after the operation, rats were evaluated with echocardiology methods. 36 rats that had an infarct area and a EF around 60% were randomized into 3 groups: MI group(n=12) were injected a blank vehicle fluid intravenously for 5 days, after which they continued to be raised on standard food and water for 30 days. MI+NRG group(n=12), received NRG-110μg·kg-1 intravenously for 5 days, after which they continued to be raised on standard food and water for 30 days. MI+Capt group (n=12) received captopril orally (dissolved in their drinking water 2g/L) for 30days, after which tap water substituted the solution for 5 days. Final echocardiographic and hemodynamic measurements were made at the end of 1 month of therapy. Total RNA was extracted from frozen left ventricular tissues, and was reverse transcribed into firststrand PCR was performed with primers for BNP、 ANP. Results Rats treated with neuregulin had a smaller LVDs (P=0.014), a betterLVEF (P=0.004),and a tendency towards less lung perfusion than untreated rats. Neuregulin decreased the expression of ANP mRNA in the ventricle (P=0.025).Conclusion Neuregulin markedly improved the cardiac function of rats that survived myocardial infarction,and decreased the expression of ANP mRNA in the ventricle. | Yuanfang LI Naisheng CAI Xinghua GU Jingmin ZHOU Keqiang WANG Yunzeng ZOU Junbo GE | 2005 | Journal of Geriatric Cardiology2005，2，4： | 0 |
| 7 | Preliminary K-Ar geochronology of lavas from southern Lau Basin显示文摘In this short note, we report the ages of five lava samples from a segment of the Eastern Lau Spreading Center (ELSC) and three samples from the Valu Fa Ridge (VFR) in the southern Lau Basin. These samples were collected in situ from the axes and flanks of the spreading centers in the basin. These ages provide a key to better understanding the spreading mode, crustal formation and overall tectonic evolution of the basin. Except for two basaltic andesites and one andesite, the lavas analyzed are basalts. The ages of the lavas from ELSC range from (1.45 ± 0.15) Ma to (0.74 ± 0.04) Ma whereas those from VFR range from (0.50 ± 0.06) Ma to (0.32 ± 0.27) Ma, and the basalts give the oldest ages. The relatively younger ages of the VFR lavas are consistent with proposed tectonic evolution of the southern Lau Basin, i.e., VFR is a propagating extension of ELSC. The occurence of older lavas close to or on spreading axes in the southern Lau Basin implies the complex tectonic evolution of the basin. These results underscore a need for further detailed geophysical and geological studies in the southern Lau Basin, in order to better clarify the crustal accretion tectonic evolution in this area. | YAN Quanshu SHI Xuefa LI Naisheng GAO Jingjing SU Tianyun | 2013 | Acta Oceanologica Sinica2013，32，2： | 0 |
| 8 | Quantitative Analysis and Chemical Fingerprint Similarity for Quality Control of the Seeds of Paeonia suffruticosa Andr. by HPLC显示文摘 | TIAN Xiao YANG Meiqi GUO Sen LIU Qingchao ZHANG Li HO Chi-Tang BAI Naisheng | 2017 | Chemical Research in Chinese Universities2017，33，4： | 0 |
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