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Acta Geologica Sinica(English Edition) 2021年第5期95卷 1777-1778页

作者： qian jiahui LI Shun Guangdong Provincial Key Lab of Mineral Resources and Geological Processes School of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory ZhuhaiGuangdong 519080China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China

Objective The Trans-North China Orogen(TNCO)is widely considered as a Paleoproterozoic(1.95-1.85 Ga)continental collisional belt along which the Eastern and Western blocks amalgamated to form the North China *** recent years,several late Archean(~2.50 Ga)metamorphic ages were reported in this belt(Yang et al.,2015;Xiao et al.,2019;Wang et al.,2020),arousing widespread discussion on late Archean *** the South Hengshan Complex(SHC)of the TNCO,an interesting outcrop has been discovered(Fig.1),which shows a clear truncation relationship between a strongly deformed tonal ite-trondhjemite-granodiorite(TTG)gneiss and a weakly deformed mafic dyke with'red-eye socket'texture(***).

关键词： belt Archean Eastern

Paleoproterozoic crustal evolution of the Hengshan-Wutai—Fuping region,North China Craton

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Geoscience Frontiers 2014年第4期5卷 485-497页

作者： Chunjing Wei jiahui qian Xiwen Zhou MOE Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking University Institute of Geology Chinese Academy of Geological Sciences

An arguable point regarding the Neoarchean and Paleoproterozoic crustal evolution of the North China Craton（NCC）is whether the tectonic setting in the central belt during the mid-Paleoproterozoic（2.35-2.0 Ga）was dominated by an extensional regime or an oceanic subduction-arc regime.A review of the midPaleoproterozoic magmatism and sedimentation for the Hengshan-Wutai-Fuping region suggests that a back-arc extension regime was dominant in this *** conclusion is consistent with the observation that the 2.35-2.0 Ga magmatism shows a typical bimodal distribution where the mafic rocks mostly have arc affinities and the acidic rocks mainly comprise highly-fractioned calc-alkaline to alkaline（or A-type）granites,and that this magmatism was coeval with development of extensional basins characteristic of transgressive sequences with volcanic interlayers such as in the Hutuo *** the final amalgamation of the NCC was believed to occur at ～1.85 Ga,recent zircon U-Pb age dating for mica schist in the Wutai Group suggests a collisional event may have occurred at ～1.95 *** metamorphic ages of ～1.85 Ga,obtained mostly from the high-grade rocks using the zircon U-Pb approach,most probably indicate uplifting and cooling of these high-grade *** is because（i）phase modeling suggests that newly-grown zircon grains in highgrade rocks with a melt phase cannot date the age of peak pressure and temperature stages,but the age of melt crystallization in cooling stages;（ii）the metamorphic P-T paths with isobaric cooling under 6-7 kb for the Hengshan and Fuping granulites suggest their prolonged stay in the middle-lower crust;and（iii）the obtained metamorphic age data show a continuous distribution from 1.95 to 1.80 ***,an alternative tectonic scenario for the Hengshan-Wutai-Fuping region involves：（i）formation of a proto-NCC at ～2.5 Ga;（ii）back-arc extension during 2.35-2.0 Ga resulting in bimodal magmatism and sedimentation in rifting basins on an Archean basem

关键词： Bimodal magmatismMetamorphic P-T pathPaleoproterozoic tectonic evolutionHengshan-Wutai-Fuping regionNorth China Craton

New Discovery of ~1866 Ma High-temperature Mylonite in the Helanshan Complex: Marking a Late-stage Ductile Shearing in the Khondalite Belt, North China Craton

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1418-1419页

作者： QIAO Hengzhong YIN Changqing ZHANG Jian qian jiahui WU Shangjing Leshan Normal University LeshanSichuan 614000China School of Earth Sciences and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Objective The Khondalite Belt is a nearly E–W-trending Paleoproterozoic Himalayan-type orogen in the Western Block of the North China Craton. It is regarded as a result of the collision between the northern Yinshan Block and the southern Ordos Block at ~1.95 Ga, which led to the formation of the united basement of the Western Block(e.g., Zhao et al., 2005;Yin et al., 2011). The Khondalite Belt has undergone long-term continent-continen collisional orogenic processes, and a remarkable series of late-stage orogen-parallel ductile shear zones developed(e.g., Huang et al., 2013;Gong et al., 2014).

关键词： Belt trending Himalayan

Discrimination of pressed sesame oil:A comparison study of non-targeted UV spectral fingerprints combined with different chemometric methods

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Grain & Oil Science and Technology 2024年第4期7卷 254-261页

作者： Dongmin Wang Yuxin Liu jiahui qian Yake Li Lixia Hou Huamin Liu College of Food Science and Engineering Institute of Special Oilseed Processing and TechnologyHenan University of TechnologyZhengzhou 450001China School of International Education Henan University of TechnologyZhengzhou 450001China

This study explores the utilization of various chemometric analytical methods for determining the quality of pressed sesame oil with different adulteration levels of refined sesame oil using UV spectral *** goal of this study was to provide a reliable tool for assessing the quality of sesame *** UV spectra of 51 samples of pressed sesame oil and 420 adulterated samples with refined sesame oil were measured in the range of 200-330 *** classification and prediction methods,including linear discrimination analysis(LDA),support vector machines(SVM),soft independent modeling of class analogy(SIMCA),partial least squares regression(PLSR),support vector machine regression(SVR),and back-propagation neural network(BPNN),were employed to analyze the UV spectral data of pressed sesame oil and adulterated sesame *** results indicated that SVM outperformed the other classification methods in qualitatively identifying adulterated sesame oil,achieving an accuracy of 96.15%,a sensitivity of 97.87%,and a specificity of 80%.For quantitative analysis,BPNN yielded the best prediction results,with an R^(2) value of 0.99,RMSEP of 2.34%,and RPD value of 10.60(LOD of 8.60%and LOQ of 28.67%).Overall,the developed models exhibited significant potential for rapidly identifying and predicting the quality of sesame oil.

关键词： Pressed sesame oil Refined sesame oil Adulteration detection UV spectra Chemometrics

Atomic-resolution characterization on the structure of strontium doped barium titanate nanoparticles

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Nano Research 2021年第12期14卷 4802-4807页

作者： Haoyu Jiang Jizhen Qi Dongchang Wu Wei Lu jiahui qian Haifeng Qu Yixiao Zhang Pei Liu Xi Liu Liwei Chen In-situ Center for Physical Sciences School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240China i-Lab CAS Center for Excellence in Nanoscience Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou215123China Suzhou Bao Shun Mei Technology Co. Ltd.Room 305Building 1199 Jinji Lake AvenueSuzhou Industrial ParkSuzhou215123China DTU Nanolab Technical University of DenmarkFysikvejBuilding 3072800LyngbyDenmark Shanghai Nanoport Thermo Fisher Scientific Building A2517 Jinke RoadPudong DistrictShanghai201203China

Ferroelectric barium titanate nanoparticles(BTO NPs)may play critical roles in miniaturized passive electronic devices such as multi-layered ceramic *** increasing experimental and theoretical understandings on the structure of BTO and doped BTO have been developed over the past decade,the majority of the investigation was carried out in thin-film materials;therefore,the doping effect on nanoparticles remains ***,doping-induced local composition and structure fluctuation across single nanoparticles have yet to be *** this work,we use electron microscopy-based techniques including high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM),integrated differential phase contrast(iDPC)-STEM,and energy dispersive X-ray spectroscopy(EDX)mapping to reveal atomically resolved chemical and crystal structure of BTO and strontium doped BTO *** X-ray diffraction(PXRD)results indicate that the increasing strontium doping causes a structural transition from tetragonal to cubic phase,but the microscopic data validate substantial compositional and microstructural inhomogeneities in strontium doped BTO *** work provides new insights into the structure of doped BTO NPs and will facilitate the materials design for next-generation high-density nano-dielectric devices.

关键词： barium titanate nanoparticles doping effect structural transition high-angle annular dark-field scanning transmission electron microscopy integrated differential phase contrast

Newly discovered youngest UHT metamorphism on Earth,Western Sulawesi,Indonesia

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Geoscience Frontiers 2023年第2期14卷 14-26页

作者： Juiyen Hsia Jian Zhang Guochun Zhao jiahui qian Jin Liu Min Sun Changqing Yin Peng Gao Welson Weisheng Xian Minjie Guo School of Earth Sciences and Engineering Sun Yat-sen UniversityGuangzhouChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina Department of Earth Sciences University of Hong KongPokfulam RoadHong KongChina College of Earth Sciences Jilin UniversityChangchunChina Pt.Enersteel Jl.Pejaten Barat II No.20 Kav.CSouth Jakarta 12510Indonesia

Ultrahigh-temperature(UHT)metamorphism represents an extreme crustal thermal event with peak conditions exceeding 900C at 7–13 *** the modern-style plate tectonic system,records of the UHT metamorphism are relatively rare due to the secular cooling of *** the Palu region of Western Sulawesi,we newly discovered a series of HT-UHT metamorphic rocks including amphibolite,granulite,eclogites and *** them,two granulite samples(18CS14-2,18CS14-4)with high garnet content(>50 mol%)are chosen for petrographic observation,phase equilibrium modelling,and zircon U-Pb *** rocks are characterized by a relic M1 assemblage of Grt+Ky+Bt+Rt and a M2 assemblage of Grt+Sil+Pl+Spl+Crd±Qtz+Ilm+*** equilibrium modelling based on effective bulk compositions yields UHT conditions of 7.2–8.5 kbar/940–1080C(18CS14-2)and 7.0–7.3 kbar/1000–1040C(18CS14-4).U-Pb analysis reveals two generations of metamorphic zircon with evolving REE content that is intimately related to garnet growth and *** age of 36–5.3 Ma is ascribed to syn-to post-M1 metamorphism,whereas the young zircon age of 5.1–3.8 Ma is linked to syn-and post-M2 *** UHT metamorphism was probably the consequence of the upwelling of asthenospheric mantle triggered by post-collisional delamination of lithosphere in the MiocenePliocene(ca.5 Ma).It could represent the youngest known UHT metamorphism on Earth.

关键词： UHT metamorphism Granulite Sulawesi Indonesia Lithosphere delaimination

Preliminary study on the function of Toxoplasma gondii α-amylase 1 and its protective immunity against acute and chronic toxoplasmosis

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Preliminary study on the function of Toxoplasma gondii α-am...

中国畜牧兽医学会兽医寄生虫学分会第一届青年科学家学术论坛

作者： Jing Yang Chenghang Yang jiahui qian Junlong Zhao Rui Fang State Key Laboratory of Agricultural Microbiology College of Veterinary MedicineHuazhong Agricultural University

As a vitalparasiticprotozoan,the energy metabolism of Toxoplasma gondii(***)bradyzoitesis different from tachyzoites,and the most typical feature is massive amylopectin accumulated in the cytoplasm of *** is supposed that the amylopectin granule may be an energy reserve for the transformation of cysts and oocysts into tachyzoites.a-amylase 1(a-amyl) is one of the enzymes involved in the digestion of the amylopectin,and may be phosphorylated by *** the present study,ME49△α-amy1 mutant was generated using CRISPR/CAS9-mediated homologous gene replacement system to explore the specific biological functions of a-amyl in amylopectin metabolic pathway,and then intracellular replication assay and plaque assay were used to measure the proliferation ability of tachyzoites in *** staining was performed to identify the starch synthesis of ME49△α-amy1 mutant,and the virulence and formation of brain cysts formation were *** results obtained from our study revealed that the deletion of the a-amyl gene had no significant effect on the reproduction and starch synthesis in vitro,but contributed to virulence attenuation and reduction of the formation of brain cysts in ***,a mouse model was established to explore the protective immunity of ME49△α-awy1 mutant,and demonstrated that ME49△α-amy1 mutant could provide short-term and long-term protection against acute and chronic infections that survival rates were nearly 100%.From the experimental results,it can be assumed that other enzymes in combination with a-amyl may be involved in digestion of the amylopectin,and ME49△α-amyl attenuated strain exert a superior protective effect on both acute and chronic infections,suggesting that ME49 Aa-amyl mutant may possess the possibility of potential vaccine candidate for toxoplasmosis.

关键词： Toxoplasma gondii α-amylase 1 amylopectin metabolism protection vaccine

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藏南亚东地区中新世岩浆活动及构造意义

岩石学报 2024年第8期40卷 2353-2373页

作者：王艳高彭尹常青张健钱加慧中山大学地球科学与工程学院广东省地质过程与矿产资源探查重点实验室广州510275 香港大学地球科学系中国香港

喜马拉雅淡色花岗岩是研究造山带构造-岩浆演化历史的岩石探针。亚东淡色花岗岩位于高喜马拉雅序列中部,其成因机制和构造意义有待进一步的研究和讨论。本研究提供了新的亚东地区淡色花岗岩和花岗片麻岩的全岩地球化学和锆石年代学数据... 详细信息

喜马拉雅淡色花岗岩是研究造山带构造-岩浆演化历史的岩石探针。亚东淡色花岗岩位于高喜马拉雅序列中部,其成因机制和构造意义有待进一步的研究和讨论。本研究提供了新的亚东地区淡色花岗岩和花岗片麻岩的全岩地球化学和锆石年代学数据。亚东淡色花岗岩具有相对较高的SiO_(2)、K_(2)O含量,和相对较低的CaO、FeO^(T)、MgO含量,属于过铝-强过铝质、高钾钙碱性花岗岩。它们具有较低的稀土含量,相对富集的LREE含量,明显的Eu负异常。这些地球化学特征同典型的高喜马拉雅淡色花岗岩极为一致。本研究获得了顶噶二云母花岗岩约23Ma和21Ma的两期结晶年龄,并且认为该地区高喜马拉雅结晶岩系的部分熔融可能早在36~30Ma就已经开始了。获得亚东淡色花岗岩的ε_(Nd)(t)值和(^(87)Sr/^(86)Sr)i分别为-16.7~-13.8和0.754080~0.791009,与亚东变沉积岩的Sr-Nd同位素组成极其一致,而花岗片麻岩具有明显更高的ε_(Nd)(t)值和(^(87)Sr/^(86)Sr)i,分别为-9.0~-8.8和0.847193~0.866306。因此,我们认为亚东淡色花岗岩源自高喜马拉雅结晶岩系中变沉积岩的部分熔融,且不含或极少有花岗片麻岩的物质贡献。综合全岩地球化学、变质岩石学及年代学研究,我们认为高喜马拉雅结晶岩系在埋藏加厚的过程中就已经发生了白云母为主的脱水部分熔融,在随后的伸展构造阶段发生大规模减压熔融,产生大量中新世淡色花岗岩。

关键词：淡色花岗岩亚东 U-Pb年代学 Sr-Nd同位素喜马拉雅碰撞造山带

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龙泉关剪切带眼球状花岗质片麻岩锆石U-Pb年代学和Lu-Hf同位素特征及其地质意义

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地学前缘 2019年第3期26卷 171-182页

作者：王盟钱加慧张进江张波长安大学地球科学与资源学院陕西西安710054 北京大学地球与空间科学学院北京100871 中山大学地球科学与工程学院广东广州510275

恒山五台阜平地区地处华北克拉通中部造山带的中段,早前寒武纪地体出露较好,是解析华北克拉通早前寒武纪演化过程的最佳地段。龙泉关剪切带位于五台杂岩和阜平杂岩的交接部位,其主要岩石类型为眼球状花岗质片麻岩、变粒岩和斜长角闪岩... 详细信息

恒山五台阜平地区地处华北克拉通中部造山带的中段,早前寒武纪地体出露较好,是解析华北克拉通早前寒武纪演化过程的最佳地段。龙泉关剪切带位于五台杂岩和阜平杂岩的交接部位,其主要岩石类型为眼球状花岗质片麻岩、变粒岩和斜长角闪岩。本文利用LA-ICP-MS方法对龙泉关剪切带中的眼球状花岗质片麻岩进行了锆石U-Pb年龄和Lu-Hf同位素的测试。结果显示,龙泉关眼球状花岗质片麻岩原岩结晶年龄为(2 547±7)Ma,其εHf(t)值介于+2.7^+9.2,表明其源区主要为相对年轻的地壳物质,与五台地区新太古代花岗岩非常相似。龙泉关花岗质眼球状片麻岩中锆石两阶段Hf模式年龄(TDM2)为2 477~2 872 Ma,具有2.58Ga、2.71Ga和2.81Ga三个峰值,记录了华北克拉通新太古代初始地壳生长事件。

关键词：锆石U-Pb年龄 Hf同位素龙泉关剪切带华北克拉通

Quantitative Proteomics analysis of lysine crotonylation in porcine alveolar macrophages after Toxoplasma gondii infection

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Quantitative Proteomics analysis of lysine crotonylation in ...