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Journal of Materials Science & Technology 1996年第6期12卷 439-444页

作者： chuanfang yang and jiayong chen (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China)(To whom correspondence should be addressed) Institute of Chemical Metallurgy Chinese Academy of Sciences Beijing 100080 China

Zr(IV) was extracted by tri-n-butyl phosphate in kerosene from concentrated nitric acid solutions and the formation of the third phase during extraction was experimentally investigated. Zirconia powders were prepared by using the loaded organic phase as the bulk solution precipitated with aqueous ammonia or NaOH solution. The powder prepared was characterized with TEM, XRD,EDAX and TG-DTA. Effects of some conditions on powder preparation were studied and it was shown that nanosized particles could be obtained from this extraction system but conditions should be carefully controlled for powder purity and particle size.

关键词： Zirconia

Achieving Synergistic Improvement in Dielectric and Energy Storage Properties of All-Organic Poly(Methyl Methacrylate)-Based Copolymers Via Establishing Charge Traps

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Energy & Environmental Materials 2024年第2期7卷 308-319页

作者： Guanghu He Huang Luo chuanfang Yan Yuting Wan Dang Wu Hang Luo Yuan Liu Sheng chen Key Laboratory of Polymeric Materials and Application Technology of Hunan Province College of ChemistryXiangtan UniversityXiangtan 411105China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Guangdong University of Petrochemical Technology Maoming 525000China

How to achieve synergistic improvement of permittivity(ε_(r))and breakdown strength(E_(b))is a huge challenge for polymer ***,for the first time,theπ-conjugated comonomer(MHT)can simultaneously promote theε_(r)and E_(b)of linear poly(methyl methacrylate)(PMMA)*** PMMA-based random copolymer films(P(MMA-co-MHT)),block copolymer films(PMMA-b-PMHT),and PMMA-based blend films were prepared to investigate the effects of sequential structure,phase separation structure,and modification method on dielectric and energy storage properties of PMMA-based dielectric *** a result,the random copolymer P(MMA-coMHT)can achieve a maximumε_(r)of 5.8 at 1 kHz owing to the enhanced orientation polarization and electron *** electron injection and charge transfer are limited by the strong electrostatic attraction ofπ-conjugated benzophenanthrene group analyzed by the density functional theory(DFT),the discharge energy density value of P(MMA-co-PMHT)containing 1 mol%MHT units with the efficiency of 80%reaches15.00 J cm^(-3)at 872 MV m^(-1),which is 165%higher than that of pure *** study provides a simple and effective way to fabricate the high performance of polymer dielectrics via copolymerization with the monomer of P-type semi-conductive polymer.

关键词： dielectric capacitor electrical properties energy density polymer dielectric semiconductor polymer

Apatite Fission Track Thermochronology of Granite from the Xiazhuang Uranium Ore Field,South China:Implications for Exhumation History and Ore Preservation

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 430-440页

作者： SUN Yue chen Zhengle PAN jiayong HUO Hailong LI Haidong SUN Junjie XU Guangchun State Key Laboratory of Nuclear Resources and Environment School of Earth SciencesEast China University of TechnologyNanchang 330013China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China No.290 Research Institute CNNCShaoguanGuangdong 512029China

Xiazhuang uranium ore field,located in the southern part of the Nanling Metallogenic Belt,is considered one of the largest granite-related U regions in South *** this paper,we contribute new apatite fission track data and thermal history modeling to constrain the exhumation history and evaluate preservation potential of the Xiazhuang Uranium ore *** Triassic outcrop granite samples collected from different locations of Xiazhuang Uranium ore field yield AFT ages ranging from 43 to 24 Ma with similar mean confined fission track lengths ranging from 11.8±2.0 to 12.9±1.9μm and Dpar values between 1.01 and 1.51μ*** robustness time-temperature reconstructions of samples from the hanging wall of Huangpi fault show that the Xiazhuang Uranium ore field experienced a time of monotonous and slow cooling starting from middle Paleocene to middle Miocene(~60-10 Ma),followed by relatively rapid exhumation in the late Miocene(~10-5 Ma)and nearly thermal stability in the Pliocene-Quaternary(~5-0 Ma).The amount of exhumation after U mineralization since the Middle Paleogene was estimated as~4.3±1.8 km according to the integrated thermal history *** studies indicate that the ore-forming ages of U deposits in the Xiazhuang ore field are mainly before Middle Paleocene and the mineralization depths are more than 4.4±1.2 ***,the exhumation history since middle Paleocene plays important roles in the preservation of the Xiazhuang Uranium ore field.

关键词： apatite fission track exhumation history ore preservation Xiazhuang Uranium ore field South China

Homogenous coating of Li^(+)conductive Li_(5)AlO_(4)on single-crystalline nonstoichiometric Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)for rechargeable lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 651-659,I0014页

作者： Guoyu Ding Shizhou Wang Jinhan Li Ziyan Wu Jiayu chen jiayong Du Xinhui Huang Kuiming Liu Yudong Zhang Zhonghan Wu Yiyang Peng Qiancheng Zhao Meng Yu Fangyi cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Advanced Chemical Power Sources Nankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Cobalt-free,nickel-rich LiNi_(1-x)Al_(x)O_(2)(x≤0.1)is an attractive cathode material because of high energy density and low cost but suffers from severe structural degradation and poor rate *** this study,we propose a molten salt-assisted synthesis in combination with a Li-refeeding induced aluminum segregation strategy to prepare Li_(5)AlO_(4)-coated single-crystalline slightly Li-rich Li_(1.04)Ni_(0.92)Al_(0.04)O_(2).The symbiotic formation of Li_(5)AlO_(4)from reaction between molten lithium hydroxide and doped aluminum in the bulk ensures a high lattice matching between the Ni-rich oxide and the homogenous conductive Li_(5)AlO_(4)that permits high Li^(+)*** from mitigated undesirable side reactions and phase evolution,the Li_(5)AlO_(4)-coated single-crystalline Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)delivers a high specific capacity of220.2 mA h g^(-1)at 0.1 C and considerable rate capability(182.5 mA h g^(-1)at 10 C).Besides,superior capacity retention of 90.8%is obtained at 1/3 C after 100 cycles in a 498.1 mA h pouch full ***,the particulate morphology of Li_(1.04)Ni_(0.92)Al_(0.04)O_(2)remains intact after cycling at a cutoff voltage of 4.3 V,whereas slightly Li-deficient Li_(0.98)Ni_(0.97)Al_(0.05)O_(2)features intragranular cracks and irreversible lattice *** results highlight the value of molten salt-assisted synthesis and Li-refeeding induced elemental segregation strategy to upgrade Ni-based layered oxide cathode materials for advanced Li-ion batteries.

关键词： Aluminum segregation Surface coating Nonstoichiometric oxides Molten synthesis Cathode materials

Selenomethionine alleviates chronic heat stress-induced breast muscle injury and poor meat quality in broilers via relieving mitochondrial dysfunction and endoplasmic reticulum stress

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动物营养学报 2024年第1期16卷 363-375页

作者： Jinzhong Jing Jiayi Wang Xiaoyu Xiang Shenggang Yin jiayong Tang Longqiong Wang Gang Jia Guangmang Liu Xiaoling chen Gang Tian Jingyi Cai Bo Kang Lianqiang Che Hua Zhao Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education of China Ministry of Agriculture and Rural Affairs of Sichuan Province Animal Nutrition Institute Sichuan Agricultural University Chengdu 611130 Sichuan China College of Animal Science and Technology Sichuan Agricultural University Chengdu 611130 Sichuan China

In the present study, the chronic heat stress (CHS) broiler model was developed to investigate the potential protection mechanism of organic selenium (selenomethionine, SeMet) on CHS-induced skeletal muscle growth retardation and poor meat quality. Four hundred Arbor Acres male broilers (680 ± 70 g, 21 d old) were grouped into 5 treatments with 8 replicates of 10 broilers per replicate. Broilers in the control group were raised in a thermoneutral environment (22 ± 2 °C) and fed with a basal diet. The other four treatments were exposed to hyperthermic conditions (33 ± 2 °C, 24 h in each day) and fed on the basal diet supplied with SeMet at 0.0, 0.2, 0.4, and 0.6 mg Se/kg, respectively, for 21 d. Results showed that CHS reduced ( P 0.05) the growth performance, decreased ( P 0.05) the breast muscle weight and impaired the meat quality of breast muscle in broilers. CHS induced protein metabolic disorder in breast muscle, which increased ( P 0.05) the expression of caspase 3, caspase 8, caspase 9 and ubiquitin proteasome system related genes, while decreased the protein expression of P-4EBP1. CHS also decreased the antioxidant capacity and induced mitochondrial stress and endoplasmic reticulum (ER) stress in breast muscle, which increased ( P 0.05) the ROS levels, decreased the concentration of ATP, increased the protein expression of HSP60 and CLPX, and increased ( P 0.05) the expression of ER stress biomarkers. Dietary SeMet supplementation linearly increased ( P 0.05) breast muscle Se concentration and exhibited protective effects via up-regulating the expression of the selenotranscriptome and several key selenoproteins, which increased ( P View The PDF

关键词： Broiler Chronic heat stress Skeletal muscle Meat quality Mitochondrial dysfunction Endoplasmic reticulum stress

Artificial parasin I protein (API) supplementation improves growth performance and intestinal health in weaned piglets challenged with enterotoxigenic Escherichia coli

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ANIMAL NUTRITION 2024年第3期18卷 154-165页

作者： Zou, Congzhi Zhao, Wanxin Yin, Shenggang Xiang, Xiaoyu Tang, jiayong Jia, Gang Che, Lianqiang Liu, Guangmang chen, Xiaoling Tian, Gang Cai, Jingyi Kang, Bo Zhao, Hua Sichuan Agr Univ Anim Nutr Inst Key Lab Anim Dis Resistance Nutr Minist Agr & Rura Key Lab Anim Dis Resistance NutrMinist EducKey L Chengdu 611130 Peoples R China Sichuan Agr Univ Coll Anim Sci & Technol Chengdu 611130 Peoples R China

Diarrheas are common risks faced by piglets during the weaning period. This study investigated the alleviating effects of artificial parasin I protein (API) on growth performance and intestinal health of weaned pigs upon enterotoxigenic Escherichia coli (ETEC) challenge. Sixty piglets were randomly divided into five groups and fed a basal diet (CON) or basal diet supplemented with API at 0, 750, and 1500 mg/kg or antibiotics for 5 weeks. On d 15 and 25, piglets were challenged with ETEC K88 except for the CON group. Before the ETEC challenge (d 1-14), dietary API supplementation improved growth performance, and 750 mg API increased (P < 0.05) the average daily gain (ADG), decreased (P < 0.05) feed to gain ratio (F/G) and diarrhea index of weaned piglets. ETEC challenge (during d 15-35) reduced growth performance and increased (P < 0.01) the F/G, diarrhea rate, and diarrhea index. This event was accompanied by the numerically increased malondialdehyde (MDA) levels in serum and ileum, the decreased (P < 0.05) zonula-occludens-1 (ZO-1) and interleukin-6 (IL-6) in the ileum, and the increased (P 1/4 0.04) secretory immunoglobulin A (sIgA) protein in the ileum. Artificial parasin I protein supplementation alleviated the negative impact of ETEC. The 750 mg/kg API inclusion elevated (P < 0.05) ADG and decreased (P < 0.05) F/G. Two levels of API decreased (P < 0.01) the diarrhea rate and diarrhea index. Meanwhile, API inclusion decreased (P < 0.01) the crypt depth in the jejunum, elevated (P < 0.05) villus height in the duodenum and villus height to crypt depth ratio in the duodenum and ileum, up-regulated (P < 0.05) ZO-1 gene, and down-regulated (P < 0.05) mucin-2 gene in the jejunum, and 1500 mg/kg API decreased (P < 0.01) sIgA level and down-regulated (P < 0.05) IL-1b gene in the ileum. Furthermore, 750 mg/kg API elevated (P < 0.01) Bifidobacteria population and acetic acid concentrations in the cecal chyme. In conclusion, API supplementation alleviates the negative impa

关键词： Artificial parasin I protein Growth performance Intestinal barrier Diarrhea Weaned piglet IMMUNOGLOBULIN-A ANTIBODIES TIGHT JUNCTION PROTEINS MICROBIAL-POPULATIONS BARRIER FUNCTION HISTONE H2A FATTY-ACID SYSTEM INFLAMMATION HOMEOSTASIS MORPHOLOGY

MPDZ variants associated with epilepsies and/or febrile seizures and the individualized genotype-phenotype correlation

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Genes & Diseases 2024年第4期11卷 124-127页

作者： Junxia Luo Yun Li Yong Lv Xin Li Bing Qin chuanfang cheng Xiaorong Liu Weiping Liao Jie Wang Zaifen Gao Department of Epilepsy Center Children's Hospital Affiliated to Shandong UniversityJinanShandong 250022China Department of Epilepsy Center Jinan Children's HospitalJinanShandong 250022China Department of Brain Function and Neuroelectrophysiology The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan 421001China Department of Pediatrics The First Affiliated Hospital of University of Science and Technology of China(Anhui Provincial Hospital)HefeiAnhui 230001China Department of Pediatrics The Second HospitalCheeloo College of MedicineShandong UniversityJinanShandong 250033China Epilepsy Center and Department of Neurosurgery The First Affliated Hospital of Jinan UniversityGuangzhouGuangdong 510630China Department of Cardiology The Second Afiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong 510260China Institute of Neuroscience and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University GuangzhouGuangdong 510260China Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China GuangzhouGuangdong 510260China

The multiple PDZ domain crumbs cell polarity complex component gene(MPDZ;MIM:603785),is highly expressed in the brain across the whole *** encodes the multiple PDZ domain protein,which is a member of the NMDAR signaling complex that may play a role in the control of AMPAR potentiation and synaptic plasticity in excitatory synapses."Previously,MPDZ variants have been demonstrated to be associated with autosomal recessive congenital hydrocephalus-2(HYC2;MIM:615219)which is commonly complicated by brain abnormalities and developmental *** were reported in only one *** association between MPDz and epilepsy requires clarification.

关键词： epilepsy febrile congenital

基于网络药理学与脂质组学探讨迷迭香酸缓解食物过敏的效应机制

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食品工业科技 2024年第16期45卷 1-12页

作者：杨庆贾斌梅陈仕云尚洁丽许琳胡家勇柳鑫武汉轻工大学食品科学与工程学院湖北武汉430023 大宗粮油精深加工教育部重点实验室湖北武汉430023 国家市场监管重点实验室(动物源性食品中重点化学危害物检测技术) 湖北武汉430075

为研究迷迭香酸缓解食物过敏的效应机制,利用网络药理学和分子对接以及脂质组学探究迷迭香酸(Rosmarinic acid,RA)缓解食物过敏的效应机制。利用数据库分析平台(TCMSP)、Swiss Target Prediction、Pharm Mapper、Super Pred和Gene Card... 详细信息

为研究迷迭香酸缓解食物过敏的效应机制,利用网络药理学和分子对接以及脂质组学探究迷迭香酸(Rosmarinic acid,RA)缓解食物过敏的效应机制。利用数据库分析平台(TCMSP)、Swiss Target Prediction、Pharm Mapper、Super Pred和Gene Cards等获得RA的潜在效应靶点。通过软件Cytoscape和String数据库构建“活性成分-靶点”蛋白互作(PPI)网络,并采用AutoDockTools软件进行分子对接验证。进一步通过建立卵清蛋白(Ovalbumin,OVA)食物过敏小鼠模型验证RA缓解食物过敏的效应,并基于高分辨质谱对小鼠血清进行脂质代谢分析。结果表明,网络药理分析共筛选到关联靶点46个。基因本体(Geno ontology,GO)富集分析表明RA主要通过对蛋白质磷酸化、鞘糖脂、磷脂和类固醇等的结合发挥作用。京都基因和基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析表明关联靶点主要富集在Th1和Th2细胞分化通路、脂代谢和炎症性肠病通路等。动物实验结果显示RA干预可以显著(P<0.05,P<0.01,P<0.001)抑制OVA致敏引起的小鼠血清过敏反应介质上升,且RA干预组小鼠血清总胆固醇(Total Cholesterol,T-CHO)和甘油三酯(Triglyceride,TG)水平下降。脂质组学分析中,在正/负离子模式下分别筛选出25/36种潜在差异脂质代谢物。对脂质差异代谢物的富集分析表明,小鼠的血清脂质代谢影响甘油磷脂代谢和鞘脂代谢通路。因此,本研究表明RA主要通过调节脂质代谢和机体炎症反应发挥缓解食物过敏的作用。

关键词：食物过敏迷迭香酸抗过敏网络药理学脂质组学

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Dynamic Model and Motion Mechanism of Magnetotactic Bacteria with Two Lateral Flagellar Bundles

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Journal of Bionic Engineering 2012年第2期9卷 200-210页

作者： Cenyu yang chuanfang chen Qiufeng Ma Longfei Wu Tao Song Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Graduate University of Chinese Academy of Sciences Beijing 100049 P. R. China France-China Bio-Mineralization and Nano-Structures Laboratory Beoing 1 00193 P. R. China Laboratoire de Chimie Bacterienne UPR9043 Universite de la Mediterranee lnstitut de Microbiologie de la Mediterranee CNRS F-13402 Marseille Cedex 20 France

Magnetotactic Bacteria （MTB） propel themselves by rotating their flagella and swim along the magnetic field lines. To analyze the motion of MTB, MTB magneto-ovoid strain MO-1 cells, each with two bundles of flagella, were taken as research object. The six-degrees-of-freedom （6-DoF） dynamic model of MO-1 was established based on the Newton-Euler dynamic equations. In particular, the interaction between the flagellum and fluid was considered by the resistive force theory. The simulated motion trajectory of MTB was found to consist of two kinds of helices： small helices restilting from the imbalance of force due to flagellar rotation, and large helices arising from the different directions of the rotation axis of the cell body and the propulsion axis of the flagellum. The motion behaviours of MTB in various magnetic fields were studied, and the simulation results agree well with the experiment results. In addition, the rotation frequency of the flagella was estimated at 1100 Hz, which is consistent with the average rotation rate for Na^＋-driven flagellar motors. The included angle of the magnetosome chain was predicted at 40° that is located within 20° to 60° range of the observed results. The results indicate the correctness of the dynamic model, which may aid research on the operation and control of MTB-propelled micro-actuators. Meanwhile, the motion behaviours of MTB may inspire the development of micro-robots with new driving mechanisms.

关键词： magnetotactic bacteria dynamic model resistive force theory motion mechanism

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嘉兴市冬季VOCs污染特征及健康风险评估

环境科学与技术 2024年第7期47卷 206-215页

作者：熊传芳杨晓霞张颖龙陈建挺李莉唐倩嘉兴市生态环境应急监控与事故调查中心浙江嘉兴314000 浙江省嘉兴生态环境监测中心浙江嘉兴314000 嘉兴市智慧环保与机动车污染防治中心浙江嘉兴314000 浙江省生态环境监测中心浙江杭州310012

文章于2021年1月1日-2月28日期间对嘉兴市114种VOCs组分进行在线连续监测,分析VOCs浓度水平及组分特征,评估臭氧生成潜势(OFP),通过后向轨迹和特征物种对比值等探讨VOCs的来源,并开展苯系物健康风险评估。结果表明,监测期间嘉兴市VOCs... 详细信息

文章于2021年1月1日-2月28日期间对嘉兴市114种VOCs组分进行在线连续监测,分析VOCs浓度水平及组分特征,评估臭氧生成潜势(OFP),通过后向轨迹和特征物种对比值等探讨VOCs的来源,并开展苯系物健康风险评估。结果表明,监测期间嘉兴市VOCs平均体积浓度为38.16×10^(-9),烷烃、含氧有机物(OVOCs)、卤代烃、烯烃、芳香烃和炔烃分别占比31.05%、20.78%、19.61%、13.56%、12.07%和2.93%,春节期间VOCs平均体积浓度为16.82×10^(-9)。从日变化看,烷烃、烯烃、芳香烃、卤代烃的日变化趋势与VOCs一致,OVOCs呈现波动上升。对OFP进行计算,监测期间烯烃和芳香烃OFP贡献最大,关键活性物种为甲苯、丙烯、间/对-二甲苯、乙烯等,主要受溶剂挥发和机动车排放影响;春节期间烯烃和烷烃OFP贡献最大,关键活性物种为丙烯、反-2-丁烯、顺-2-丁烯等,主要受交通源影响。通过特征物种对评价、后向轨迹和潜在源贡献因子分析法,得出监测期间嘉兴市VOCs受传输和本地排放影响,其中烷烃、卤代烃、烯烃、芳香烃受到区域传输和本地排放共同影响,OVOCs和炔烃主要为本地排放。监测期间,嘉兴市各苯系物的非致癌风险危害商值在安全阈值之内,但苯和间/对二甲苯的致癌风险值超出安全阈值。以上结果可为嘉兴市冬季VOCs污染管控和空气质量提升提供理论依据。

关键词： VOCs 臭氧生成潜势健康风险评价后向轨迹嘉兴