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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1530-1541页

作者： SONG Bowen zhang kexin JI Junliang HAN Fang WANG Chaowen WANG Jiaxuan AI Keke Institute of Geological Survey China University of GeosciencesWuhan 430074HubeiChina State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074HubeiChina Faculty of Earth Sciences China University of GeosciencesWuhan 430074HubeiChina School of Earth Sciences East China University of TechnologyNanchang 330013JiangxiChina Gemmological Institute China University of GeosciencesWuhan 430074HubeiChina

With a thick sequence of early Eocene to Pleistocene terrestrial records, the Qaidam Basin on the northern Tibetan Plateau provides an important sedimentary archive for understanding the paleoenvironmental evolution of the northeast Tibetan Plateau. In this study, specimens of fossil fish remains are collected from the late Middle Miocene（Serravallian, -12 Ma） of the middle member of the Shang Youshashan Formation, Dahonggou（DHG） section, in the northern Qaidam Basin. Based on a systematic study of these materials, the remains have assigned to Cyprinidae, with typical pharyngeal teeth and dorsal fin spines with serrations on the posterior edge. Our discovery improves understanding of the cyprinid fish distribution characteristics in the Qaidam Basin during the Cenozoic. Cooccurrences of terrestrial brackish ostracod species Cyprideis and long chain alkenonesin the layer indicate that the studied cyprinid fish lived in a generally large brackish to saline water body during the late middle Miocene（Serravallian）, when the climate of Qaidam Basin was still not sufficiently dry to form an extreme saline water lake.

关键词： Cyprinidae paleoenvironment late Middle Miocene Qaidam Basin

Metal-organic framework-derived Fe/Cu-substituted Co nanoparticles embedded in CNTs-grafted carbon polyhedron for Zn-air batteries

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Carbon Energy 2020年第2期2卷 283-293页

作者： kexin zhang Yelong zhang Qinghua zhang Zibin Liang Lin Gu Wenhan Guo Bingjun Zhu Shaojun Guo Ruqiang Zou Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijingChina Department of Applied Physics and Materials Wuyi UniversityJiangmenGuangdong ProvinceChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina Institute of Clean Energy Peking UniversityBeijingChina

Metal-organic frameworks(MOFs)and MOF-derived materials have attracted great attention as alternatives to noble-metal based electrocatalysts owing to their intriguing structure properties,especially for high efficiency and stable oxygen reduction reaction(ORR).Herein,we employed a one-pot reaction to make a multimetal(Fe,Co,Cu,and Zn)mixed zeolitic imidazolate framework(MM-ZIF)via adopting a simple in situ redox *** pyrolysis of the target MM-ZIF,a highly porous carbon polyhedron(FC-C@NC)grafted with abundant carbon nanotubes was obtained,in which ultrasmall Co nanoparticles with partial lattice sites substituted by Fe and Cu were *** obtained FC-C@NC possessed large surface area,highly porous structure,widely-spread metal active sites,and conductive carbon frameworks,contributing to outstanding ORR activity and long-term *** displayed superior tolerance to methanol crossover and exceeded the commercial Pt/C catalyst and most previously reported non-noble-metal ***,the as-produced FC-C@NC-based zinc-air battery afforded an open-circuit potential of 1.466 V,a large specific capacity of 659.5 mAh/g,and a high gravimetric energy density of 784.3 Wh/kgZn,significantly outperforming the Pt/C-based cathode.

关键词： electrocatalysis lattice sites substitution metal-organic frameworks oxygen reduction reaction zinc-air battery

Early Paleozoic Ocean Plate Stratigraphy of the Beishan Orogenic Zone, NW China: Implications for Regional Tectonic Evolution

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Acta Geologica Sinica(English Edition) 2020年第4期94卷 1042-1059页

作者： WANG Jiaxuan zhang kexin JIN Jisuo SONG Bowen YU Yang WANG Lijun WANG Shengdong SUN Shuo School of Earth Sciences China University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China Institute of Geological Survey China University of GeosciencesWuhan 430074China Department of Earth Sciences University of Western OntarioLondonON N6A 5B7Canada Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesLangfangHebei 065000China

The Beishan orogenic zone is a key area to understand evolution of the Central Asian Orogenic Belt that is an accretionary factory well-enough preserved in the Paleozoic. In early Paleozoic, the tectonic mélange zone containing the coherent unit and mélange unit is triggered by the complicated accretionary process of the Beishan area. The early Paleozoic tectonic evolution of the Beishan orogenic zone is investigated in this study using sedimentology and stratigraphic correlations of the lowe Paleozoic deposits. From the Cambrian to the middle Ordovician, this region was characterized by geographically extensive, flat-bedded siliceous mudstone, indicating the existence of a large ocean basin. The oceanic plate entered the convergence phase in terms of the Wilson Circle during the Middle Ordovician, when numerous magmatic arcs formed along two opposite sides of the ocean. The magmatic arcs became the widest during the Silurian, suggesting that the Hongliuhe-Niujuanzi-Xichangjing Ocean(HNX;a southern branch of the Paleo Asian Ocean) was reduced to a small residual ocean in the central Beishan region by that time, and probably lasted till the Carboniferous or later by newly published data.

关键词： sedimentology tectono-paleogeography Beishan orogenic zone ocean plate stratigraphy

Volcanism at the Permian-Triassic Boundary in South China and Its Effects on Mass Extinction

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 417-431,450-451页

作者： Yin Hongfu, Huang Siji, zhang kexin, Yang Fengqing, Ding Meihua, Bi Xianmei and zhang Suxin China University of Geosciences, Wuhan, Hubei China University of Geosciences Wuhan Hubei

This paper discusses the clayrocks widespread at the Permian-Triassic boundary, which are mostly of volcanic origin. Volcanogenetic textures, structures and minerals such as high-temperature quartz are found in clayrocks at the Permian-Triassic boundary in many places. Thousands of microspherules have been collected from the Boundary clayrocks, many of which exhibit the typical features of the process from melting to cooling and solidification. indicating that they were formed by volcanic eruption or extraterrestrial impact. Volcanic effects on the Permian-Triassic mass extinction may be reflected in conodonts, algae and ammonoids. The Boundary clayrocks are found in many Permian-Triassic sections along the coast of Tethys. Their orighin remains to be studied.

关键词： Volcanism at the Permian-Triassic Boundary in South China and Its Effects on Mass Extinction Mass

Overcoming neutrophil-induced immunosuppression in postoperative cancer therapy: Combined sialic acid-modified liposomes with scaffold-based vaccines

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Asian Journal of Pharmaceutical Sciences 2024年第2期19卷 153-169页

作者： Cong Li Lihong Wang kexin zhang Zeyu Wang Zhihang Li Zehao Li Lijiang Chen School of Pharmaceutical Science Liaoning UniversityShenyang 110036China

Immunotherapy is a promising approach for preventing postoperative tumor recurrence and metastasis. However, inflammatory neutrophils, recruited to the postoperative tumor site, have been shown to exacerbate tumor regeneration and limit the efficacy of cancer vaccines. Consequently, addressing postoperative immunosuppression caused by neutrophils is crucial for improving treatment outcomes. This study presents a combined chemoimmunotherapeutic strategy that employs a biocompatible macroporous scaffold-based cancer vaccine (S-CV) and a sialic acid (SA)-modified, doxorubicin (DOX)-loaded liposomal platform (DOX@SAL). The S-CV contains whole tumor lysates as antigens and imiquimod (R837, Toll-like receptor 7 activator)-loaded PLGA nanoparticles as immune adjuvants for cancer, which enhance dendritic cell activation and cytotoxic T cell proliferation upon localized implantation. When administered intravenously, DOX@SAL specifically targets and delivers drugs to activated neutrophils in vivo, mitigating neutrophil infiltration and suppressing postoperative inflammatory responses. In vivo and vitro experiments have demonstrated that S-CV plus DOX@SAL, a combined chemo-immunotherapeutic strategy, has a remarkable potential to inhibit postoperative local tumor recurrence and distant tumor progression, with minimal systemic toxicity, providing a new concept for postoperative treatment of tumors.

关键词： Postoperative tumor treatment Immunotherapy Scaffold-based cancer vaccine Inflammatory neutrophils Sialic acid-modied liposome

Time-restricted feeding downregulates cholesterol biosynthesis program via RORγ-mediated chromatin modification in porcine liver organoids

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Journal of Animal Science and Biotechnology 2021年第1期12卷 402-414页

作者： kexin zhang Hao Li Zimeng Xin Yanwei Li Xiaolong Wang Yun Hu Haoyu Liu Demin Cai College of Animal Science and Technology Yangzhou UniversityYangzhou 225009PR China Institute of Epigenetics and Epigenomics Yangzhou UniversityYangzhou 225009PR China

Background: Time-restricted feeding(TRF) is a dieting strategy based on nutrients availability and diurnal rhythm,shown to improve lipid metabolism efficiency. We have demonstrated previously that retinoic acid-related(RAR)orphan receptor(ROR) γ is the primary transcription factor controlling cholesterol(CHO) biosynthesis program of animals. However, the functional role of RORγ in liver physiology of pigs in response to TRF has not been determined, largely due to the lack of functional models and molecular tools. In the present study, we established porcine liver organoids and subjected them to restricted nutrients supply for 10-h during the light portion of the ***: Our results showed that TRF regimen did not alter hepatocyte physiology, including unchanged cell viability, caspase 3/7 enzyme activity and the gene signature of cell proliferation in porcine liver organoids,compared to the control group(P > 0.05). Furthermore, we found that TRF downregulated the hepatic CHO biosynthesis program at both mRNA and protein levels, along with the reduced cellular CHO content in porcine liver organoids(P < 0.05). Using unbiased bioinformatic analysis of a previous ChIP-seq data and ChIP-qPCR validation, we revealed RORγ as the predominant transcription factor that responded to TRF, amongst the 12 targeted nuclear receptors(NRs)(P < 0.05). This was likely through RORγ direct binding to the MVK gene(encoding mevalonate kinase). Finally, we showed that RORγ agonists and overexpression enhanced the enrichment of cofactor p300, histone marks H3 K27 ac and H3K4me1/2, as well as RNA polymerase II(Pol-II) at the locus of MVK, in TRF-porcine liver organoids, compared to TRF-vector control(P < 0.05).Conclusions: Our findings demonstrate that TRF triggers the RORγ-mediated chromatin remodeling at the locus of CHO biosynthesis genes in porcine liver organoids and further improves lipid metabolism.

关键词： Cholesterol biosynthesis program Histone modification Pig Porcine liver organoids RORγ Time-restricted feeding

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不同施肥对稻田氮磷流失的影响及机制分析

农业环境科学学报 2025年第1期44卷 126-139页

作者：骆美李静高庭峰 Nebiyou Legesse 刘莹张可欣赖锡军马友华胡宏祥安徽农业大学资源与环境学院合肥230036 阜阳师范大学生物与食品工程学院安徽阜阳236037 中国科学院南京地理与湖泊研究所南京210008

为探讨秸秆还田、缓释肥和水溶性肥料配施化肥对稻田径流氮磷流失的影响及机制,于2022—2023年采用田间小区试验,设置不施肥(CK)、推荐施肥(OF)、秸秆还田与化肥配施(SF)、缓释肥与化肥配施(SRF)和水溶性肥料与化肥配施(WSF)5个处理,对... 详细信息

为探讨秸秆还田、缓释肥和水溶性肥料配施化肥对稻田径流氮磷流失的影响及机制,于2022—2023年采用田间小区试验,设置不施肥(CK)、推荐施肥(OF)、秸秆还田与化肥配施(SF)、缓释肥与化肥配施(SRF)和水溶性肥料与化肥配施(WSF)5个处理,对稻田径流氮磷流失、水稻产量和土壤肥力进行研究。结果表明:SRF和WSF处理较OF处理均降低径流氮磷流失量,年平均总氮流失量分别降低43.73%和45.10%,总磷流失量分别降低57.34%和62.36%,而SF处理2022年总氮和总磷流失量分别提高了11.64%和25.00%;与OF处理相比,SF、SRF和WSF处理水稻产量分别提高1.78%、2.67%和1.45%,各施肥处理对稻田土壤肥力指标均有提升效果,总体表现为SRF处理提升效果最佳。相关性分析表明稻田径流总氮流失量和总磷流失量均与径流量、径流氮磷浓度、土壤硝态氮、铵态氮含量、磷酸酶和脲酶活性呈正相关,而与氮磷浓度比、土壤pH、全氮、全磷、微生物量碳和微生物量磷含量呈负相关。因此,缓释肥配施化肥和水溶性肥料配施化肥提高水稻产量的同时减少氮和磷径流损失,是促进巢湖地区农业可持续生产和减少稻田面源污染的有效农艺措施。

关键词：秸秆还田缓释肥水溶性肥料水稻产量氮磷流失土壤肥力

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Anachronistic facies in the Lower Triassic of South China and their implications to the ecosystems during the recovery time

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Science China Earth Sciences 2008年第11期51卷 1646-1657页

作者： XiaoMing Zhao (1) (2) JinNan Tong (1) HuaZhou Yao (2) kexin zhang (1) Chen Zq (3) School of Earth and Geographical Sciences the University of Western Australia Crawley WA6009 Australia

The end-Permian mass extinction not only severely distressed the Paleozoic ecosystems but also dramatically changed the sedimentary systems, resulting in a peculiar Early Triassic ecosystem and submarine environment during the recovery time following the mass extinction. The Lower Triassic is characteristic of the wide occurrence of various distinctive sediments and related sedimentary structures, such as flatpebble conglomerates, vermicular limestone, subtidal wrinkle structures, microbialite, carbonate seafloor fans, thin-bedded limestone and zebra limestone-mudstone. These sediments were common in the Precambrian to Early Ordovician marine settings, and then they occurred only in some extreme and unusual environments with the expansion of metazoan faunas. However, the Early Triassic witnessed an "anachronistic" reappearance of some distinctive sedimentary records in normal shallow marine settings. The study of these anachronistic facies should be of great importance for the understanding of the unique ecosystem and marine environment through the great Paleozoic-Mesozoic transition. The anachronistic facies characterized by vermicular limestone have been documented in many localities in South China and occur at various horizons of the Lower Triassic. Most types of re- ported distinctive sediments over the world have been observed in the Lower Triassic of South China. This provides an excellent opportunity for understanding the Early Triassic environment and its co- evolution with the biotic recovery. Among the anachronistic facies the vermicular limestone is the most characteristic and common distinctive sediments in the Lower Triassic of South China but has received relatively few investigations. Taking it as a case study, we will detail the variation of vermicular limestone and its stratigraphic distribution in the Three Gorges area, Hubei Province. The investigation on the vermicular limestone and other distinctive sediments from the Lower Triassic of South Chi

关键词： Early Triassic anachronistic facies biotic recovery ecosystem Three Gorges area South China

Recent progress on electro-sorption technology for lithium recovery from aqueous sources

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Nano Research 2024年第4期17卷 2563-2573页

作者： Qichen Lu Peng Liu Tianyi Zhou Ruling Huang kexin zhang Lin Hu Rong Liu Zhibo Ren Jinyi Wang Xiaolong Wang Huaneng Clean Energy Research Institute Beijing 102209China

Lithium is known as the“white petroleum”of the electrification era,and the global demand for lithium grows rapidly with the quick development of new energy *** aqueous solutions,such as salt lake brine,underground brine,and seawater,have large lithium reserves,thus this kind of lithium resource has become a research hotspot *** with other lithium extraction technologies,electro-sorption method shows good prospects for practical applications with advantages in the aspects of efficiency,recovery ratio,cost,and ***,this review covers recent progress on electro-sorption technology for lithium recovery from aqueous solutions,including the concept illustration,research progress of the applied working electrodes and counter electrodes,and the evaluation indicators of electro-sorption ***,some prospects for the development of this technology are also *** hope this review is beneficial for the construction of high-efficient electrochemical lithium recovery system to achieve an adequate lithium supply in the future.

关键词： lithium extraction electro-sorption technology lithium selective electrode counter electrode system evaluation method

An ultrathin two-dimensional iridium-based perovskite oxide electrocatalyst with highly efficient{001}facets for acidic water oxidation

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Journal of Energy Chemistry 2022年第3期31卷 619-627,I0017页

作者： Lan Yang kexin zhang Hui Chen Lei Shi Xiao Liang Xiyang Wang Yipu Liu Qing Feng Mingjie Liu Xiaoxin Zou State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooOntario N2L 3G1Canada Northwest Institute for Non-ferrous Metal Research Xi'an 710016ShaanxiChina Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

The oxygen evolution reaction(OER)is an electrochemical bottleneck half-reaction in some important energy conversion systems(e.g.,water splitting),which is traditionally mediated by iridium oxides in acidic ***-structured Ir-containing oxides(e.g.,SrIrO_(3))are a family of striking electrocatalysts due to their high specific activity,but this excellent quality is difficultly transferred to a nano-electrocatalyst with large active surface and good structural ***,we present a synthesis method that produces a 2D ultrathin{001}-faceted SrIrO_(3)perovskite(2D-SIO)with a thickness of∼5 nm and high surface area(57.6 m^(2)g^(−1)).We show that 2D-SIO can serve as a highly active and stable electrocatalytic nanomaterial for OER under acidic *** perovskite nanomaterial produces 10 mA cm^(−2)current density at a low overpotential(η,243 mV),and maintains its catalytic activity after 5000 continuous cyclic *** ultrathin structure and large surface area,the exposed{001}facets are found to be the most crucial and unique structural factor for achieving high catalytic activity and structural *** joint experimental and theoretical results demonstrate that these advantageous microstructural features of 2D-SIO endow it with a strong capability to generate the key O^(*)intermediates,and thereby facilitate O–O bond formation and the OER.

关键词： Oxygen evolution reaction Electrocatalysis Nanosheet Two-dimensional material Water splitting