检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

从体部指数值探讨中国族群体部特征的共性

解剖学报 2024年第5期55卷 619-624页

作者：李咏兰于会新宇克莉张兴华包金萍郑连斌内蒙古师范大学生命科学与技术学院呼和浩特010022 内蒙古师范大学民族学人类学学院呼和浩特010022 内蒙古自治区高等学校生物多样性保护与可持续利用重点实验室呼和浩特010022 天津师范大学生命科学学院天津市动物多样性保护与利用重点实验室天津300387 天津师范大学体育学院天津300387

目的探讨中国族群体部特征的共性。方法对中国62个族群的8项体部指数值进行分析。结果聚类分析发现,男性52个族群、女性59个族群聚入了北方族群为主的混合组及南方族群为主的混合组。8个汉族族群分别聚入各个组中,没有聚合出汉族组。体... 详细信息

目的探讨中国族群体部特征的共性。方法对中国62个族群的8项体部指数值进行分析。结果聚类分析发现,男性52个族群、女性59个族群聚入了北方族群为主的混合组及南方族群为主的混合组。8个汉族族群分别聚入各个组中,没有聚合出汉族组。体部指数的分型结果表明,长躯干型、中胸型、宽肩型、宽骨盆型和中腿型是中国男性族群主要的体部类型。中躯干型、宽胸型、宽肩型、宽骨盆型和中腿型是中国女性族群主要的体部类型。这表现出中国各族群体部特征具有明显的一致性。中国族群体部特征的一致性与其族源相近有关,汉族在中国各个族群交流融合过程中起了重要作用。在汉族的历史上,出现过多次大规模的人口迁徙。北方少数民族南下融入北方汉族,北方汉族南下促进了南方汉族的形成,使得南方汉族与北方汉族体部特征具有相似性,也促进了南方少数民族融入南方汉族。此外,迁入少数民族地区的汉族也逐渐融入少数民族中。结论中国各族群体部特征存在明显的共性。

关键词：体质特征南方族群北方族群体部指数活体测量人

Electrooxidation of Hydroxypivalaldehyde in an Undivided Cell

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第5期22卷 626-630页

作者： yu Jian-guo CAO Xue-jing ZHANG Heng-bin ZHANG yu-min li ke-chang College of Chemistry Jilin University Changchun 130021 P. R. China

The factors affecting the electrooxidation of hydroxypivalaldehyde（HPAL） in an undivided cell were studied by using cyclic voltammetry（CV）, linear scan voltammetry（ LSV）, and potentiostatic electrolysis. The electrocatalytic activity and stability of a PbO2 electrode in sulfuric acid, acetic acid, and phosphoric acid were studied. The selectivity and the current efficiency for producing hydroxypivalic acid were explored with different supporting electrolytes, concentrations of HPAL, and pH values. The results show that higher selectivity and current efficiency for producing hydroxypivalic acid can be achieved when sulfuric acid with a high concentration is used as the supporting electrolyte and the selectivity and the current efficiency can reach 80% and 60%. resvectively.

关键词： Hydroxypivalaldehyde Hydroxypivalic acid Electrooxidation Electrosynthesis

姜黄素通过抑制炎症因子IL-6调控胃肠道间质瘤细胞的增殖抑制的研究

在线全文

学校读者我要写书评

暂无评论

中国临床药理学杂志 2024年第8期40卷 1160-1164页

作者：陈燕李雨珂王茹静肖洪涛石三军成都中医药大学药学院四川成都611137 四川省肿瘤临床医学研究中心、四川省肿瘤医院研究所、四川省癌症防治中心、电子科技大学附属肿瘤医院药学部四川成都610041

目的探讨姜黄素是否具有作为胃肠道间质瘤(GIST)治疗潜在药物的能力。方法通过细胞转录学分析伊马替尼耐药细胞与非耐药细胞的差异基因。用5~80μg·mL^(-1)姜黄素作用于GIST-T1及GIST-T1/IMR细胞,用细胞计数试剂-8(CCK-8)法验证姜黄... 详细信息

目的探讨姜黄素是否具有作为胃肠道间质瘤(GIST)治疗潜在药物的能力。方法通过细胞转录学分析伊马替尼耐药细胞与非耐药细胞的差异基因。用5~80μg·mL^(-1)姜黄素作用于GIST-T1及GIST-T1/IMR细胞,用细胞计数试剂-8(CCK-8)法验证姜黄素的抗肿瘤活性。实验组给予20μg·mL^(-1)的姜黄素,对照组给予磷酸盐缓冲溶液。用酶联免疫吸附试验法检测白细胞介素-6(IL-6)、活性氧(ROS)与一氧化氮合酶(iNOS)的含量,用流式细胞术分析细胞周期变化。结果以非耐药细胞为对比,伊马替尼耐药细胞上存在1 300个上调表达基因,1 609个下调表达基因。姜黄素对GIST-T1及GIST-T1/IMR细胞的半抑制浓度分别为(15.33±1.36)和(10.49±2.12)μg·mL^(-1)。在GIST-T1细胞中,实验组和对照组的IL-6分别为(3.45±0.01)和(5.64±0.42)pg·mL^(-1),ROS分别为(2 841.42±81.83)和(4 174.32±439.12) pg·mL^(-1),iNOS分别为(7.02±0.08)和(8.08±0.03)μmol·L^(-1);在GIST-T1/IMR细胞中,实验组和对照组的IL-6分别为(2.47±0.30)和(6.30±0.01)pg·mL^(-1),ROS分别为(4 706.40±146.71)和(8 254.34±342.35) pg·mL^(-1),iNOS分别为(6.42±0.09)和(7.29±0.04)μmol·L^(-1);在2种细胞中,实验组的上述指标与对照组比较,在统计学上差异均有统计学意义(P<0.05,P<0.01)。姜黄素可阻滞GIST-T1及GIST-T1/IMR细胞周期于G1期,进一步缩短S期与G2期。结论姜黄素可通过抑制炎症分泌,从而调控GIST增殖。

关键词：姜黄素炎症白细胞介素-6 胃肠道间质瘤细胞增殖

Effect and regulation ofα-dstroglycan glyco⁃sylation on chronic social defeat induced depressive-like behaviors of mice

在线全文

学校读者我要写书评

暂无评论

中国药理学与毒理学杂志 2021年第9期35卷 693-694页

作者： li yu-ke WANG Fang Department of pharmacology School of basic medicineTongji Medical CollegeHuazhong Uni-versity of Science and TechnologyWuhan 430030China

OBJECTIVEα-Dstroglycan(α-DG)is a predominant component in the dystrophin-glycoprotein complex(DGC)and a recently char⁃acterized receptor for several extracellular matrix components with high *** research⁃es have reported that hypoglycosylation ofα-DG is associated with the pathophysiology of diseas⁃es,especially muscular dystrophy,but little is known about major depressive disorder(MDD).like-acetylglucosaminyl transferase(Large)is a key enzyme for glycosylation ofα-DG,which mainly modifies two points in the middle domain ofα-DG:Thr-317 and ***α-DG(GLY-α-DG)can bind with high affinity to extracellular matrix(ECM)molecules that con⁃tain laminin globular(LG)domains,including per⁃lecan,agrin and *** is mainly derived from neurons rather than glial *** cultured hippocampal neurons,it was found that agrin could regulate the homeostatic plasticity of inhibi⁃tory neurons by acting on GLY-α-*** mice are transgenetic models for the investigation of Duchenne muscular *** studies have shown that the expression of GLY-α-DG in the peripheral and brain tissues of Mdx mice is significantly *** mice show cognitive impairment and high levels of *** this study,we employed chronic social defeat stress(CSDS)to establish an animal model of depression and detected the expression of GLY-α-DG among the brain areas associated with the pathophysiology of *** So⁃cial interaction test(SIT)and sucrose preference test(SPT)were used to evaluate depressive-like *** field(OF)and elevated plus maze(EPM)test were used to determine the anxiety-like behavior of Mdx ***-sup⁃pressed feeding test(NSFT)forced swim test(FST)and tail suspension test(TST)were used to detect the depressive-like behavior of Mdx *** object recognition test(NOR)was applied to evaluate the cognition of Mdx *** social defeat stress was used to explore the susceptibility to stress in Mdx ***

关键词： α-dstroglycan depressive-like behav⁃iors social defeat

在线全文

学校读者我要写书评

暂无评论

内蒙古敖汉旗朝吐沟组的地质时代

地质与资源 2024年第3期33卷 310-314页

作者：张德军温升福李雨柯张渝金中国地质调查局沈阳地质调查中心辽宁沈阳110034 中国地质调查局东北地质科技创新中心辽宁沈阳110034 中国地质科学院地质研究所北京100037 中国地质调查局北京100037 中国地质调查局牡丹江自然资源综合调查中心牡丹江157000

对采自大兴安岭南部朝吐沟组建组剖面的酸性火山岩(流纹岩)样品开展锆石U-Pb LA-ICP-MS年代学分析,测试结果显示:样品具有岩浆成因的特征,加权平均年龄为374±10 Ma,指示该酸性火山岩形成于晚泥盆世,发育该套火山岩的朝吐沟组为晚泥盆... 详细信息

对采自大兴安岭南部朝吐沟组建组剖面的酸性火山岩(流纹岩)样品开展锆石U-Pb LA-ICP-MS年代学分析,测试结果显示:样品具有岩浆成因的特征,加权平均年龄为374±10 Ma,指示该酸性火山岩形成于晚泥盆世,发育该套火山岩的朝吐沟组为晚泥盆世地层.研究认为沿华北板块北缘展布的朝吐沟组火山-沉积建造形成于晚泥盆世一个次稳定—非稳定的被动陆缘盆地沉积环境,这对更准确地认识大兴安岭乃至整个东北地区泥盆纪—石炭纪构造演化以及古地理格局具有重要意义.

关键词：朝吐沟组锆石U-Pb年龄晚泥盆世华北板块大兴安岭

Low-Temperature Properties of CePt_3P Tuned by Magnetic Field

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第5期36卷 98-101页

作者： Jian Chen Bai-Jiang Lv Shi-Yi Zheng yu-ke li Zhejiang University of Water Resources and Electric Power Hangzhou 310018 Zhejiang Provincial key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027 Department of Physics Hangzhou Normal UniversityHangzhou 310036

We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K^2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ∝T^n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.

关键词： Low-Temperature Properties of CePt3P Tuned by Magnetic Field AFM MMT QCP

Atomically Dispersed Ruthenium Catalysts with Open Hollow Structure for lithium-Oxygen Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第2期16卷 154-164页

作者： Xin Chen yu Zhang Chang Chen Huinan li yuran lin ke yu Caiyun Nan Chen Chen Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China Beijing key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875People’s Republic of China

lithium–oxygen battery with ultrahigh theoretical energy density is considered a highly competitive next-generation energy storage device,but its practical application is severely hindered by issues such as difficult decomposition of discharge products at ***,we have developed N-doped carbon anchored atomically dispersed Ru sites cathode catalyst with open hollow structure(h-RuNC)for lithium–oxygen *** one hand,the abundance of atomically dispersed Ru sites can effectively catalyze the formation and decomposition of discharge products,thereby greatly enhancing the redox *** the other hand,the open hollow structure not only enhances the mass activity of atomically dispersed Ru sites but also improves the diffusion efficiency of catalytic ***,the excellent activity from atomically dispersed Ru sites and the enhanced diffusion from open hollow structure respectively improve the redox kinetics and cycling stability,ultimately achieving a high-performance lithium–oxygen battery.

关键词： Atomically dispersed Open hollow structure Discharge product lithium Oxygen battery

Combined Study of Structural, Magnetic and Transport Properties of Eu_(0.5)Ln_(0.5)BiS_(2)F Superconductor

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2021年第4期38卷 111-116页

作者： Hui-Fei Zhai Bo lin Pan Zhang Hao Jiang yu-ke li Guang-Han Cao Department of Physics Northwest UniversityXVan 710127China Department of Physics Zhejiang UniversityHangzhou 310027China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Department of Physics Hangzhou Normal UniversityHangzhou 310036China

Superconductivity below 0.3 K and a charge-density-wave-like(CDW-like) anomaly at 280 K were observed in EuBiS_(2)F *** we report a systematic study of structural and transport properties in Eu_(0.5)Ln_(0.5)BiS_(2)F(Ln=La,Ce,Pr,Nd,Sm) by electrical resistivity,magnetization,and specific heat *** lattice constants have a significant change upon rare earth substitution for Eu,suggesting an effective *** Ln is changed from Sm to La,the superconducting transition temperature T_(c) increases from 1.55 K to 2.8 *** contrast to the metallic parent compound,the temperature dependence of electrical resistivity displays semiconductinglike behavior for all the Eu_(0.5)Ln_(0.5)BiS_(2)F ***,the CDW-like anomaly observed in EuBiS2F is completely *** the mixed valence state in the undoped compound,Eu ions in these rareearth-doped samples are mainly divalent.A specific anomaly at 1.3 K resembling that in EuBiS_(2)F suggests the coexistence of superconductivity and spin glass state for Eu_(0.5)Ln_(0.5)BiS_(2)*** of ferromagnetic order and superconductivity is found below 2.2 K in Eu_(0.5)Ln_(0.5)BiS_(2)F *** results supplies a rich diagram showing that many interesting properties can be induced in BiS_(2)-based compounds.

关键词： resistivity compound Superconductor

Construction of multifunctional lanthanum manganese mixed nanoparticles mediated by ionic liquids for selective aerobic oxidation of cyclohexane

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第5期43卷 2205-2221页

作者： Hao li Rui-Rui Zhang ke-Xin li Shuang Wei yu-Mei liu Rui-Xia liu Beijing key Laboratory of Ionic liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Selective oxidation of alkanes to produce highvalue chemicals is an essential strategy and means to realize efficient utilization of *** this work,a strategy of lanthanum manganese mixed metal oxides(LMMO)regulated via a facile ionic liquid(IL)-assisted hydrothermal method was proposed to construct the multifunctional catalysts,which exhibited excellent catalytic performance in the selective aerobic oxidation of *** 8.9%cyclohexane conversion with 90%KA oi(cyclohexanol and cyclohexanone)selectivity was achieved over the optimal LMMO catalyst under mild *** effects of anion type,carbon chain length and concentration of ILs on the structure and properties of catalysts were investigated through various characterizations,indicating the structure-directing and template effect of ILs on the multifunctional *** formation of self-assembled spherical nanoparticles followed the"dissolution-nucleation-proliferation"mechanism with the introduction of 1-butyl-3-methylimidazolium hydrogen sulfate,ascribing the synergistic effect between the microenvironment of ILs and the hydrothermal ***,the high reactive oxygen concentration redox capacity,and suitable basic sites of LMMO catalysts mediated by ILs enhance the activation of C-H bonds and molecular oxygen,simultaneously influencing the adsorption and desorption of the substrate.A comprehensive understanding of the high KA oil selectivity and radical reaction mechanism was elucidated based on in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and radical trapping *** recycling and regeneration experiments further illuminated that the removal of adsorbed cyclohexanone acting on the LMMO catalyst was the key to achieve high KA oil selectivity.

关键词： Ionic liquids Nanoparticle Multifunctional catalyst Cyclohexane oxidation