检索结果-南通市图书馆

蜈蚣全蝎散对骨癌痛大鼠行为学及其脊髓背角c-fos蛋白表达的影响

在线全文

学校读者我要写书评

暂无评论

中华全科医学 2018年第4期16卷 523-525,537页

作者：徐龙生冯勤丽张小平姚明嘉兴市第一医院麻醉与疼痛医学中心浙江嘉兴314000

目的研究蜈蚣全蝎散(CS)对骨癌痛大鼠的镇痛作用及其脊髓背角c-fos表达的影响。方法将雌性SD大鼠采用随机数字法分为6组:假手术组(S组)、胫骨癌痛组(A组)、生理盐水组(NS组)、CS 20 mg/kg(C_1组)、40 mg/kg(C_2组)、80 mg/kg(C_3组)。... 详细信息

目的研究蜈蚣全蝎散(CS)对骨癌痛大鼠的镇痛作用及其脊髓背角c-fos表达的影响。方法将雌性SD大鼠采用随机数字法分为6组:假手术组(S组)、胫骨癌痛组(A组)、生理盐水组(NS组)、CS 20 mg/kg(C_1组)、40 mg/kg(C_2组)、80 mg/kg(C_3组)。采用大鼠左胫骨上端骨髓腔注入Walker256癌细胞悬液(10μl,2×10~7cells/ml)的方法建立骨癌痛模型。造模9 d后,采用不同剂量的CS灌胃,2次/d,连续4 d后,测定各组大鼠机械痛阈值;并取L4和L5脊髓背角,运用Western blot法测定c-fos蛋白表达及RT-PCR法测定c-fos mRNA表达。结果与S组比较,A组造模后第9、12天机械痛阈值均下降,差异均有统计学意义[第9天机械痛阈值分别为:(8.69±0.53)g、(6.61±0.22)g,P<0.05;第12天机械痛阈值分别为:(8.67±0.43)g、(6.56±0.48)g,P<0.05],造模后第12天脊髓背角内c-fos蛋白、c-fos mRNA表达均上调,差异均有统计学意义(蛋白表达量分别为:1.46±0.19、3.61±0.51,P<0.05;mRNA表达量分别为:0.65±0.22、2.53±0.31,P<0.05);与NS组比较,造模第12天后,C2、C3组机械痛阈值均升高,差异均有统计学意义(均P<0.05);脊髓背角内c-fos蛋白、c-fos mRNA表达均下调,差异均有统计学意义(蛋白表达量分别为:3.24±0.67、2.71±0.43、2.15±0.37,P<0.05;mRNA表达量分别为:2.39±0.44、1.62±0.21、1.46±0.14,P<0.05)。结论蜈蚣全蝎散可缓解骨癌痛大鼠的痛觉过敏,其机制可能与降低其脊髓背角内的c-fos表达有关。

关键词：蜈蚣全蝎散骨癌痛脊髓背角 c-fos

A systematical study of the chiral magnetic effects at the RHIC and LHC energies

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2020年第2期44卷 107-114页

作者： Bang-Xiang Chen sheng-qin feng College of Science China Three Gorges UniversityYichang 443002China Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China

Considering the magnetic field response of the QGP medium,we perform a systematical study of the chiral magnetic effect（CME）,and make a comparison with the experimental results for the background-subtracted correlator H at the energies of the RHIC Beam Energy Scan（BES） and the LHC *** CME signals from our computations show a centrality trend and beam energy dependence that are qualitatively consistent with the experimental measurements of the charge dependent *** time evolution of the chiral electromagnetic current at the RHIC and LHC energies is systematically *** dependence of the time-integrated current signal on the beam energy s1/2with different centralities is *** phenomenological analysis shows that the time-integrated electromagnetic current is maximal near the collision energy s1/2≈39 *** qualitative trend of the induced electromagnetic current is in agreement with the CME experimental results at the RHIC and LHC energies.

关键词： chiral magnetic effect chiral electromagnetic current charge separations

在线全文

学校读者我要写书评

暂无评论

中国文化“译出”路径下翻译立场的阐释

外语学刊 2025年第1期 99-105页

作者：王昌芹安丰存延边大学外国语学院延吉133002 吉林农业大学外国语学院长春130118 吉林大学外国语学院长春130012

中国文化外译渐成主流之势,中国文化“译出”路径是一种客观存在。本文基于翻译立场概念特征及其研究现状的考察,以中国文化“译入”“译出”路径下翻译立场的差异为立足点,肯定中国文化“译入”路径对传播中国文化的价值,同时强调中国... 详细信息

中国文化外译渐成主流之势,中国文化“译出”路径是一种客观存在。本文基于翻译立场概念特征及其研究现状的考察,以中国文化“译入”“译出”路径下翻译立场的差异为立足点,肯定中国文化“译入”路径对传播中国文化的价值,同时强调中国文化“译出”路径下翻译立场表达的必要性和现实性。在此基础上,从内涵特征和实现途径两方面阐释中国文化“译出”路径下的翻译立场表达。在内涵特征上,体现译者翻译立场与国家翻译立场的共场,以及动态多维的翻译批评新体系的构建;在实现途径上,倡导以“中国译者为主,外语译者为辅”的中西合作译者模式,塑造以“走进去”为导向的翻译价值观,以“异化—归化”连续统策略指导中译外翻译实践。

关键词：中国文化外译 “译出” 翻译立场翻译批评新体系译者模式翻译价值观

Modern pollen assemblages of the surface lake sediments from the steppe and desert zones of the Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2021年第3期64卷 425-439页

作者： feng qin Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China

Modern pollen analysis is the basis for revealing the palaeovegetation and palaeoclimate changes from fossil pollen *** studies pertaining to the modern pollen assemblages on the Tibetan Plateau have been conducted,but little attention has been paid to pollen assemblages of surface lake *** this study,modern pollen assemblages of surface lake sediments from 34 lakes in the steppe and desert zones of the Tibetan Plateau are investigated and results indicate that the two vegetation zones are dominated by non-arboreal pollen taxa and show distinctive *** pollen assemblages from the desert zone contain substantially high relative abundance of Chenopodiaceae while those from the steppe zone are dominated by *** ratios show great potential in terms of separating different vegetation zones and to indicate climate changes on the Tibetan *** Artemisia/Chenopodiaceae ratio and arboreal/non-arboreal pollen ratio could be used as proxies for winter ***/Cyperaceae ratio and the sum of relative abundance of xerophilous elements increase with enhanced warming and *** considering the vegetation coverage around the lakes,hierarchical cluster analysis suggests that the studied sites can be divided into four clusters:meadow,steppe,desert-steppe,and *** pollen-based vegetation classification models are established using a random forest *** random forest model can effectively separate the modern pollen assemblages of the steppe zone from those of the desert zone on the Tibetan *** model for distinguishing the four vegetation clusters shows a weaker but still valid classifying *** is expected that the random forest model can provide a powerful tool to reconstruct the palaeovegetation succession on the Tibetan Plateau when more pollen data from surface lake sediments are included.

关键词： Modern pollen assemblage Tibetan Plateau Surface lake sediment Pollen-climate relationship Pollen-based vegetation classification model

Effects of MgO and TiO_2 on the viscous behaviors and phase compositions of titanium-bearing slag

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2016年第8期23卷 868-880页

作者： Cong feng Man-sheng Chu Jue Tang Jin qin feng Li Zheng-gen Liu School of Metallurgy Northeastern University

The effects of MgO and TiO_2 on the viscosity, activation energy for viscous flow, and break-point temperature of titanium-bearing slag were studied. The correlation between viscosity and slag structure was analyzed by Fourier transform infrared（FTIR） spectroscopy. Subsequently, main phases in the slag and their content changes were investigated by X-ray diffraction and Factsage 6.4 software package. The results show that the viscosity decreases when the MgO content increases from 10.00wt% to 14.00wt%. Moreover, the break-point temperature increases, and the activation energy for viscous flow initially increases and subsequently decreases. In addition, with increasing TiO_2 content from 5.00wt% to 9.00wt%, the viscosity decreases, and the break-point temperature and activation energy for viscous flow initially decrease and subsequently increase. FTIR analyses reveal that the polymerization degree of complex viscous units in titanium-bearing slag decreases with increasing MgO and TiO_2 contents. The mechanism of viscosity variation was elucidated. The basic phase in experimental slags is melilite. Besides, as the MgO content increases, the amount of magnesia–alumina spinel in the slag increases. Similarly, the sum of pyroxene and perovskite phases in the slag increases with increasing TiO_2 content.

关键词： ironmaking blast furnace slag viscous properties phase composition magnesium oxide titanium dioxide

落叶松和水曲柳带状混交对土壤微生物群落功能多样性的影响

在线全文

学校读者我要写书评

暂无评论

生态学杂志 2016年第10期35卷 2684-2691页

作者：邓娇娇周永斌杨立新张淞李慧魏亚伟邓继峰秦胜金朱文旭沈阳农业大学林学院沈阳110866

为了探讨造林模式对土壤理化性质和微生物群落功能多样性的影响,以辽宁省新宾陡岭水曲柳(Fraxinus mandshurica)、长白落叶松(Larix olgensis)人工纯林及二者混交林土壤为研究对象,对不同林型土壤pH值、养分含量和土壤微生物活性进行研... 详细信息

为了探讨造林模式对土壤理化性质和微生物群落功能多样性的影响,以辽宁省新宾陡岭水曲柳(Fraxinus mandshurica)、长白落叶松(Larix olgensis)人工纯林及二者混交林土壤为研究对象,对不同林型土壤pH值、养分含量和土壤微生物活性进行研究,对3种人工林土壤微生物代谢功能多样性进行分析。结果表明:混交林土壤全氮、速效氮、全磷和速效磷分别比落叶松纯林增加28.1%、35.6%、9.5%和12.9%;不同人工林土壤微生物群落代谢活性差异显著,总碳源的利用能力(AWCD)的顺序为水曲柳林>混交林>落叶松林,落叶松纯林土壤微生物代谢最慢,活性最弱;3种不同人工林土壤微生物群落对六大碳源的利用率存在差异,混交林在L-精氨酸、L-天门冬酰胺、丙酮酸甲酯、腐胺、N-乙酰-D-葡萄糖胺、D-半乳糖醛酸、D-葡萄糖胺酸和4-羟基苯甲酸等8种碳源的利用能力显著高于落叶松纯林;主成分分析显示,糖类和氨基酸类碳源是影响微生物活性的重要碳源;3种不同人工林土壤微生物优势度指数无显著差异,物种丰富度指数依次为水曲柳林>混交林>落叶松林;落叶松和水曲柳带状混交后可以提高土壤肥力及土壤微生物活性。

关键词：微生物功能多样性碳源利用土壤理化性质主成分分析 Biolog微平板法

在线全文

学校读者我要写书评

暂无评论

定窑遗址出土制瓷原料的科学分析

光谱学与光谱分析 2025年第1期45卷 72-81页

作者：陈殿崔剑锋秦大树黄信李鑫北京师范大学历史学院陶瓷考古与艺术研究中心北京100875 考古科学教育部重点实验室(北京大学) 北京100871 浙大城市学院考古学系浙江杭州310015 河北省文物考古研究院河北石家庄050031 中国社会科学院考古研究所北京100101

首次通过窑址发掘出土的制瓷原料,复原了定窑不同时代的胎釉配方。对2009年定窑作坊遗址考古发掘所出五代至宋金时期二十余种制瓷原料开展了ED-XRF成分分析和XRD结构分析等光谱学分析。ED-XRF成分分析显示,这些原料可能包括单一原料和... 详细信息

首次通过窑址发掘出土的制瓷原料,复原了定窑不同时代的胎釉配方。对2009年定窑作坊遗址考古发掘所出五代至宋金时期二十余种制瓷原料开展了ED-XRF成分分析和XRD结构分析等光谱学分析。ED-XRF成分分析显示,这些原料可能包括单一原料和混合原料两种。其中单一原料包括岩石、粘土以及草木灰。混合原料则包括胎料和釉料两种。XRD结构分析表明用于定窑白瓷生产高岭土类原料是含有蒙脱石和方解石的伴生石英的长石类矿物原料。高铁粘土类原料由于铁含量特别高,应当是用于配黑釉的粘土。钙质原料的分析与康葆强等学者对定窑配釉用的灰料可能使用了40%的白灰和60%的松木灰配制的结论相同。同时,还发现了釉灰,即草木煅烧石灰石后形成的混合灰料。在分析定窑白瓷釉时,认为五代的白瓷釉可能使用了釉灰配制,因此定窑釉灰的使用可能推早到五代,这是目前发现使用釉灰配釉最早的实例。对制胎原料XRD晶相分析的结果表明,除了石英和高岭石占主要比重外,还含有长石、蒙脱石、方解石等岩石类矿物。从对单一原料的X射线衍射的分析结果看,石英是粘土以及岩石这类单一原料中都含有的一类矿物,因此可能石英并非必须要添加的胎体原料。石英和高岭石是粘土原料中的主要成分,因此制胎原料应该主要以岩石类原料和粘土作为主要配料。定窑细白瓷胎料可能使用了粘土类原料配合第一类岩石类原料的配方,其配比在金代时大约为1∶1左右,北宋时期可能约为7∶3(粘土∶岩石),五代时大概为6∶4左右。对制釉原料分析结果表明,定窑配釉原料是岩石类原料与釉灰配合形成的,五代、北宋时岩石和灰的比例约为9∶1,金代时石:灰达到了9.5∶0.5。这使得我们对定窑鼎盛时期的白瓷胎釉配方有了更加清晰的了解,从而为开展定窑的复烧提供了确凿的依据。

关键词：定窑制瓷原料光谱学分析

Enamine Configuration of 5-Methyl-2-phenyl-4- [(Z)-3-tolylamino-phenylmethylene]pyrazol-3(2H)-one

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第8期24卷 957-961页

作者： QIAO Yu-qin Lü Xing-Qiang BAO feng KANG Bei-sheng School of Chemistry and Chemical Engineering Sun Yat-Sen University ChinaGuangzhou 510275

Compound 5-methyl-2-phenyl-4-[（Z）-3-tolylamino-phenylmethylene]pyrazol-3（2H）-one （C24H21N3O） crystallizes in the triclinic system, space group P1, with a = 9.267（3）, b = 9.904（4）,c = 12.035（4） A°, α = 97.896（6）, β = 103.865（6）, γ = 107.950（6）°, Mr= 367.44, Z = 2, V = 993.2（6）A°^3,Dc = 1.229 g/cm^3,μ（MoKa） = 0.077 mm^-1 and F（000） = 388. The structure was refined to R =0.0444 and wR = 0.1199 for 2903 observed reflections （I 〉 2σ（I））. The results of ^1H NMR and single-crystal X-ray diffraction studies showed the enamine character of the compound. The strong intramolecular hydrogen bonds in the large conjugate system, together with weak intermolecular C-H……π hydrogen bonding and π……π stacking, lead to the formation of a multi-dimensional supramolecular network.

关键词： 5-methyl-2-phenyl-4-[(Z)-3-tolylamino-phenylmethylene]pyrazol-3(2H)-one,enamine weak interaction snpramolecnlar network

Enumeration,Genetic Characterization and Antimicrobial Susceptibility of Lactobacillus and Streptococcus Isolates from Retail Yoghurt in Beijing,China

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2014年第9期27卷 740-748页

作者： DONG Yin Ping CHEN Qian CUI sheng Hui LI feng qin Key Laboratory of Food Safety Risk Assessment Ministry of HealthChina National Centre for Food Safety Risk Assessment Beijing Centre for Disease Control and Prevention National Institute for Food and Drug Control

Lactic acid bacteria （LAB） are widely used in food industries. Correct identification and safety evaluation of these bacteria at the species even strain level should take considerations into account. In this study, the LAB were recovered from yoghurt and characterized phenotypically and genetically. Fifty-two isolates of LAB from 31 yoghurt samples were cultured and grouped into 6 species including Luctobucillus bulguricus （24 isolates）, Streptococcus thermophilus （15 isolates）, L. ucidophilus （7 isolates）, L. porucusei/cusei （3 isolates）, L. delbrueckii （2 isolates）, and L. fermentum （1 isolate）, based on their Gram-staining, colony morphology and biochemical properties.

关键词： Enumeration,Genetic Characterization and Antimicrobial Susceptibility of Lactobacillus and Streptococcus Isolates from Retail Yoghurt in Beijing,China PFGE