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Chromite-induced magnesium isotope fractionation during mafic magma differentiation

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Science Bulletin 2017年第22期62卷 1538-1546页

作者： Ben-Xun Su Yan Hu Fang-zhen Teng Ke-Zhang Qin Yang Bai Patrick Asamoah Sakyi Dong-Mei Tang Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SdencesBeijing 100029China Department of Earth and Space Sciences University of WashingtonSeattleWA 98195USA University of Chinese Academy of Sciences Beijing 100049China Department of Earth Science University of GhanaLegonAccra LG SGhana

To better understand the mechanism of Mg isotopic variation in magma systems, here we report high precision Mg isotopic data of 17 bulk rock samples including dunite, clinopyroxenite, hornblendite and gabbro and 10 pairs of dunite-hosted olivine and chromite separates from the well-characterized Alaskan-type Xiadong intrusion in NW China, which formed by continuous and high degree of lithological differentiation from mafic magmas. Chromite separates have highly variable δ^(26)Mg values from -0.10‰ to 0.40‰, and are consistently heavier than coexisting olivine separates(-0.39‰ to -0.15 T‰). Both mineral δ^(26)Mg values and the degrees of inter-mineral fractionation are well correlated with geochemical indicators of magma differentiation, indicating that these inter-sample and inter-mineral Mg isotope fractionations are caused by magma evolution. The δ^(26)Mg values range from -0.20‰ to -0.02‰ in the dunite,-043‰ in the clinopyroxenite,-043‰ to -0.28‰ in the hornblendite, 0.18 T‰ in the chromite-bearing hornblendite, and -0.56 T‰ to -0.16‰ in the gabbro. The Mg isotopic variations in different types of rocks are closely related to fractional crystallization and accumulation of different proportions of oxides vs. silicates. Chromite crystallization and accumulation is the most important factor in controlling Mg isotope fractionation during the formation of the Xiadong intrusion. Compared to basaltic and granitic magmas, differentiation of the Alaskan-type intrusions occurs at a relatively high oxygen fugacity, which favors chromite crystallization and consequently significant Mg isotope fractionations at both mineral and whole-rock scales. Therefore, Mg isotope systematics can be used to trace the degree of magma differentiation and related-mineralization.

关键词： Mg isotopes Alaskan-type intrusion Arc magmatism Magma differentiation Chromite

Response of Two Jerusalem Artichoke (Helianthus tuberosus)Cultivars Differing in Tolerance to Salt Treatment

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Pedosphere 2010年第4期20卷 515-524页

作者： LONg Xiao-Hua HUANg Zeng-Rong HUANg Yu-Ling KANg Jian ZHANg zhen-Hua LIU Zhao-Pu College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China） Soil Science and Plant Nutrition School of Earth and Environment The University of Western Australia 35 StirlingHighway Crawley WA 6009 （Australia）

To explore genetic variability for two Jerusalem artichoke cultivated with 75% seawater irrigation for six years） and N7 （Helianthus tuberosus） cultivars, N1 （the sixth-generation （a general variety）, a experiment was conducted to study the changes in physiological attributes under different concentrations （0%, 10% and 25% of seawater concentration in greenhouse and 0%, 30% and 50% of seawater concentration in the field） of seawater salinity stress. In the greenhouse experiment, decreases of dry growth rate, but increases of dry matter percentage and membrane injury occurred in both the genotypes at 10% and 25% seawater treatments, although lesser cell membrane damage was observed in N1 than N7. N1 accumulated greater contents of Na^＋, Cl^-, soluble sugar and proline in leaves compared with NT. In the field experiment, the yields of shoot, root and tuber, and the contents of total-sugar and inulin in tubers of N1 were higher than those of N7. Lesser degree of salt injury in N1 indicated that the relatively salt-tolerant cultivar had higher K^＋/Na^＋ ratio, lower Na^＋/Ca^2＋ ratio, and the salt-induced enhancement of osmotic adjustment.

关键词： cell membrane stability genetic variabilities inorganic ions malondialdehyde seawater salinity stress

热水浴法解除蚕卵滞育的条件优化及应用效果分析

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南方农业学报 2024年第1期55卷 280-289页

作者：孙溱博廖森泰杨琼刘吉平肖阳李庆荣邢东旭广东省农业科学院蚕业与农产品加工研究所广东广州510610 华南农业大学动物科学学院广东广州510642

【目的】通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件,并测试以不同来源水处理蚕种的孵化效果,为热水浴法在蚕业生产中的推广应用提供科学依据,探索出可替代传统盐酸孵化法且更安全环保、成本低廉的蚕种人工孵化方法。【... 详细信息

【目的】通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件,并测试以不同来源水处理蚕种的孵化效果,为热水浴法在蚕业生产中的推广应用提供科学依据,探索出可替代传统盐酸孵化法且更安全环保、成本低廉的蚕种人工孵化方法。【方法】选用两广二号为供试蚕种,以卵龄(A)、处理时间(B)和处理温度(C)为变量,以蚕卵实用孵化率(Y)为响应值,通过Box-Behnken响应面优化热水浴法解除蚕卵滞育的处理条件;选择自来水、纯净水及矿泉水等不同来源的水,并选取萨尼斯、932、湘晖和春5等4个蚕种品种,分别采用优化后的条件对蚕卵进行热水浴处理,检验热水浴法解除蚕卵滞育的效果。【结果】蚕卵实用孵化率对3个变量因素的二项式拟合方程为:Y=91.03-2.01A-4.60B+22.89C+0.040AB+4.03AC+0.89BC-10.46A~2+3.25B~2-19.60C~2,响应面设计模型拟合程度较好。各因素对蚕卵实用孵化率的影响排序为处理温度(C)>处理时间(B)>卵龄(A),其中,处理温度影响极显著(P0.05,下同);两因素间交互作用对蚕卵实用孵化率的影响排序为AC>BC>AB。修正后的热水浴法最佳处理条件:卵龄17.5 h,处理时间13 s,处理温度50℃,此条件下的实际蚕卵实用孵化率为97.94%,与理论预测值(98.81%)接近。不同来源水对两广二号正、反交种进行热水浴处理后的实用孵化率均在95.00%以上,仅阳山自来水和纯净水1在热水浴处理两广二号正交种时的实用孵化率显著低于盐酸即时浸酸法,但其实用孵化率仍高于93.00%;萨尼斯、932、湘晖、春5等4个家蚕品种的热水浴实用孵化率与盐酸即时浸酸法相比均无显著差异,表明热水浴法具有较强的普适性。【结论】热水浴法能有效解除蚕卵滞育,具有较强的普适性,且成本低廉、操作简单,可作为蚕业生产上替代传统盐酸孵化法的新方法。

关键词：热水浴法二化性家蚕品种蚕卵解除滞育人工孵化响应面优化

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Rhenium-osmium(Re-Os)geochronology of crude oil from lacustrine source rocks of the Hailar Basin,NE China

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Petroleum Science 2021年第1期18卷 1-9页

作者： Qi-An Meng Xue wa.g Qiu-Li Huo Zhong-Liang Dong zhen Li Svetlana gTessalina Bryant Dware Brent IAMcInnes Xiao-Lin wa.g Ting Liu Li Zhang Exploration and Development Research Institute Daqing Oilfield Co.Ltd.Daqing 163712HeilongjiangChina Heilongjiang Provincial Key Laboratory for the Study of Tight Oil and Shale Oil Accumulation Daqing 163712HeilongjiangChina John de Laeter Centre Faculty of Science and EngineeringCurtin UniversityGPO Box U1987PerthWA 6485Australia State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023JiangsuChina

Re-Os radiometric dating of crude oil can be used to constrain the timing of hydrocarbon generation,migration or *** approach has been successfully applied to marine petroleum systems;however,this study reports on its application to lacustrine-sourced natural crude *** s amples from multiple wells producing from the Cretaceous Nantun Formation in the Wuerxun-Beier depression of the Hailar Basin in NE China were *** of the Re-Os data are compatible with a Cretaceous hydrocarbon generation event(131.1±8.4 Ma)occurring within 10 Myr of deposition of the Nantun Formation source *** addition,two younger age trends of 54±12 Ma and 1.28±0.69 Ma can be regressed from the Re-Os data,which may reflect the timing of subsequent hydrocarbon generation *** Re-Os geochronometer,when combined with complementary age dating techniques,can provide direct temporal constraints on the evolution of petroleum system in a terrestrial basin.

关键词： Re-Os dating Lacustrine crude oils Hailar basin Petroleum system evolution

Bismuth doped Sr_(2)Fe_(1.5)Mo_(0.5)O_(6-δ) double perovskite as a robust fuel electrode in ceramic oxide cells for direct CO_(2)electrolysis

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Journal of Materials Science & Technology 2023年第33期164卷 160-167页

作者： Meiting Yang zhen Yao Shuai Liu Jun wa.g Anwei Sun Haoran Xu guangming Yang Ran Ran Wei Zhou gang Xiao Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Fakultät für Physik Universität BielefeldUniversitätsstr.2533615 BielefeldGermany State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China wa School of Mines: Minerals Energy and Chemical EngineeringCurtin UniversityPerthWestern Australia6845Australia

Electrochemical conversion of CO_(2)to CO is an economically feasible method for mitigating greenhouse gas *** various electrochemical approaches,solid oxide electrolysis cells(SOECs)show high potential for CO_(2)reduction reaction(CO_(2)-RR)due to their ability to operate at high temperatures,resulting in fast reaction kinetics and increased *** their main energy loss is still associated with the large overpotential at the fuel electrode,the development of the highly efficient and durable cathode for SOECs has been extensively searched ***,we propose an A-site doping strategy to enhance the properties of Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)(SFM),which improve its performance as a cathode in SOECs for CO_(2)-RR,demonstrating favorable activity and *** structural and physiochemical characterizations,together with DFT calculations,show that the partial replacement of Sr by Bi in the SFM double perovskite not only improves CO_(2) adsorption capability at the catalyst surface but also enhances oxygen ionic conduction inside the bulk oxide,resulting in enhanced CO_(2)electrocatalysis performance in ***,a La_(0.8)Sr_(0.2)ga_(0.8)Mg_(0.2)O_(3−δ) (LSgM)electrolyte-supported single cell with the new Bi-doped SFM cathode demonstrates a large current density of 1620 mA cm^(−2) at a cell potential of 1.6 V at 850°C with good operational stability up to 200 ***-doped SFM thus represents a highly promising cathode for ceramic CO_(2)electrolyzers and could accelerate our transition towards a carbon-neutral society.

关键词： Bismuth doped perovskite Sr_(2)Fe_(1.5)Mo_(0.5)O_(6-δ) CO_(2)electrocatalysis Fuel electrode Solid oxide cells

Novel Synthetic Method for N,N’-Disubstituted guanidine

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Novel Synthetic Method for N,N’-Disubstituted Guanidine

凝血指标及D-二聚体对妊娠高血压的诊断价值

中国化学会第四届有机化学学术会议

作者： KOU, Jing-Ping LIN, Ying-Jie LI, Ji-zhen FAN, Er-Kang (College of Chemistry, Jilin University, Changchun 130012, China) (Department of Biochemistry, University of washington, Seattle, wa, 98195, USA)

＜正＞guanidine functional groups play an essential role in their biological activity. The synthetic methods for gua-nidines attracted people’s research interest recently. Many methods were based on using commercial available or literature reported guanylating reagents. We have reported an efficient synthesis of N,N’-substituted guanidine derivatives via aromatic sulfonyl-activated thiourea intermediate, PbfNH2 as the key reagent to incorporate a TFA-labile guanidine protection group greatly facilitates solid-phase synthesis of N,N’-substituted guanidine com-

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中外医疗 2018年第16期37卷 189-190,193页

作者：王荣珍山东省蒙阴县人民医院妇产科山东蒙阴276200

目的探讨凝血指标及D-二聚体对妊娠高血压患者的临床诊断价值。方法随机选取2016年3月—2017年3月该院收治的妊娠高血压患者60例为观察组,选取同时期的健康妊娠晚期孕妇60名为对照组,并将观察组分为轻度子痫前期组(1组)、重度子痫前期... 详细信息

目的探讨凝血指标及D-二聚体对妊娠高血压患者的临床诊断价值。方法随机选取2016年3月—2017年3月该院收治的妊娠高血压患者60例为观察组,选取同时期的健康妊娠晚期孕妇60名为对照组,并将观察组分为轻度子痫前期组(1组)、重度子痫前期组(2组)和子痫组(3组)。比较两组孕妇的血浆凝血酶原时间(PT)、凝血酶时间(TT)、活化部分凝血活酶时间(APTT)、纤维蛋白原(FIB)和D-二聚体水平,并分析观察组不同亚组PT、APTT、TT、FIB和D-二聚体水平。结果观察组患者PT(11.5±0.4)s、TT(14.3±1.9)s、APTT(29.8±3.2)s均比对照组PT(12.4±0.7)s、TT(15.6±2.3)s、APTT(32.4±3.6)s短,观察组FIB(5.7±0.4)g/L和D-二聚体水平(1.2±0.1)mg/L均高于对照组FIB(4.2±0.4)g/L和D-二聚体水平(0.6±0.2)mg/L,差异有统计学意义(P<0.05);比较不同亚组PT、APTT、TT、FIB和D-二聚体水平,差异有统计学意义(P<0.05);3组患者的PT、TT、APTT短于2组和1组,FIB和D-二聚体水平高于2组和1组,差异有统计学意义(P<0.05);2组患者的PT、TT、APTT短于1组,FIB和D-二聚体水平高于1组,差异有统计学意义(P<0.05)。结论检测妊娠期妇女的凝血指标和D-二聚体水平,能有效预防和监测妊娠期高血压疾病的发生和发展,在临床上有十分重要的意义。

关键词：凝血指标 D-二聚体妊娠高血压诊断价值

High-precision potassium isotope analysis using the Nu Sapphire collision cell(CC)-MC-ICP-MS

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Science China Earth Sciences 2022年第8期65卷 1510-1521页

作者： Wenjun LI Mengmeng CUI Qiqi PAN Jing wa.g Bingyu gAO Shanke LIU Meng YUAN Benxun SU Ye ZHAO Fang-zhen TENg guilin HAN Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing100049China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Nu Instruments WrexhamLL139XSUK Isotope Laboratory Department of Earth and Space SciencesUniversity of WashingtonSeattleWA98195USA Institute of Earth Sciences China University of Geosciences(Beijing)Beijing100083China

This study presents high-precision analyses of stable potassium(K)isotope ratio using the recently-developed,collision-cell multi-collector inductively coupled plasma mass spectrometry(CC-MC-ICP-MS,Nu Sapphire).The accuracy of our analyses is confirmed by measuring well-characterized geostandards(including rocks and seawater).Our results are consistent with literature values and a precision of 0.04‰(2SD)has been achieved based on multiple measurements of BCR-2 geostandard over a six-month *** also evaluate factors that may lead to artificial isotope fractionations,including the mismatches in K concentration and acid molarity between samples and bracketing standards,as well as potential *** the K adsorption capacity of AgW50-X8(200-400 mesh)is reduced with an increasing amount of matrix elements,less than 150µg K was loaded during the column *** evaluate the potential use of K isotopes as an archive of paleo seawater composition,δ^(41)K values of an international seawater standard(IAPSO),a Mn-nodule(NOD-P-1),and two iron formation standards(FeR-2 and FeR-4)are *** δ^(41)K value of IAPSO is consistent with other seawater samples reported previously,further substantiating a homogeneous K isotopic distribution in modern global *** K isotopes in Mn-nodule(NOD-P-1:−0.121±0.013‰)and iron formation samples(FeR-2:−0.538±0.009‰;FeR-4:−0.401±0.008‰)seem to be an effective tracer of their formation genesis and compositional changes of ancient *** results suggest that high-precision measurements of stable K isotopes can be routinely obtained and open up a large variety of geological applications,such as continental weathering,hydrothermal circulation and alteration of oceanic crust.

关键词： CC-MC-ICP-MS Potassium isotopes geostandards Sample-standard bracketing method Low energy path

高原地区甲型H1N1流感危重患者救治特点分析

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中国危重病急救医学 2010年第3期22卷 153-155页

作者：王毅鲁燕云郑俊达娃平措大达珍西藏自治区第二人民医院西藏自治区甲型H1N1流感重症监护病区拉萨850001

目的探讨高原地区甲型H1N1流感重症、危重症患者的救治特点。方法选择本院2009年10月10日至12月19日重症监护病房（ICU）收治的8例甲型H1N1流感患者，重症4例、危重症4例。经抗病毒、抗生素、激素、增强免疫功能、调节水和电解质平衡及... 详细信息

目的探讨高原地区甲型H1N1流感重症、危重症患者的救治特点。方法选择本院2009年10月10日至12月19日重症监护病房（ICU）收治的8例甲型H1N1流感患者，重症4例、危重症4例。经抗病毒、抗生素、激素、增强免疫功能、调节水和电解质平衡及对症支持、机械通气治疗后，分析高原地区甲型H1N1流感的治疗特点。结果8例患者均给予抗病毒药奥司他韦、抗生素莫西沙星加头孢曲松或头孢哌酮治疗；液体补充应掌握宁干勿湿的原则；3例重症和3例危重症患者给予氢化可的松，1例危重症患者给予甲泼尼龙；7例患者根据病情给予丙种球蛋白。4例患者行无创机械通气，给予双水平气道正压通气（BiPAP）或持续气道正压通气（CPAP），病情得到有效控制；1例危重症患者因病情需要行有创机械通气，初期行同步间歇指令通气（SIMV）＋压力控制通气（PCV）十高呼气末正压（PEEP）通气模式，后改为自主呼气模式＋压力支持通气（PSV）＋低PEEP行脱机前治疗，最终成功拔除气管插管脱离有创通气治疗。8例患者均治愈出院。结论对高原甲型H1N1流感重症、危重症患者应短期、足量、规范应用激素，及早给予无创机械通气治疗。

关键词：甲型H1N1流感危重症高原地区临床救治特点分析