检索结果-南通市图书馆

International Journal of Geosciences 2022年第10期13卷 918-935页

作者： Aaron k. Waswa Department of earth and Climate Sciences Faculty of Science and Technology University of Kenya Nairobi Kenya

The main objective of this study was to investigate copper-nickle-Iron bearing rocks of the northern kenya, and understand their mode of formation. The area of study is bounded by latitudes 2º52'00"n and 1º52'00"n and longitudes 37º19'00"e and 37º36'00"e, South West of marsabit town. The methods involved geological field mapping between September, 2020 and December 2020. elemental analyses of the samples were done using an XRF. Pearsonian correlation on the analyzed elements was done using Oasis Montaj 8.4. Fabric8 software was used to analyze structural data. The area comprises metamorphic, igneous and sedimentary rocks. Metamorphic rocks include biotite hornblende gneisses, biotite gneisses, biotite muscovite gneisses and marbles. Basalts of different mineralogy were also found in the area. Colluvium and alluvium sediments were found covering some of the metamorphic rocks in some areas. malachite occurs in gneisses in the central part of the area. The area has undergone deformation, which includes jointing and folding. The fold axis trend in the north-South direction and plunges to the southern part of the area. Correlation of the elements shows that there is a positive correlation of Copper-nickel-Iron. This indicates similar mode of delivery within the host rocks. kriging indicates spatial distribution of these elements within the study area. The average size of distribution can easily be computed from the maps produced by kriging.

关键词： Petrology Structural Geology Geochemistry Copper-nickel-Iron kriging

kant： The Sweet Dream of Perpetual Peace

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Journal of Philosophy Study 2017年第2期7卷 87-89页

作者： Theodosios n. Pelegrinis national and kapodistrian University of Athens

This essay is a survey upon kant＇s Sweet Dream of Perpetual Peace. According to kant, a permanent peace could be achieved under the condition of the creation of a Federation of States. This Federation of States will be rest upon three fundamental requirements--i.e., democracy, reason, universal hospitality. kant＇s idea of global Federation of States should not be confused with existing nowadays Unions of States, such as european Union, which depend heavily upon a central authority and a complicated bureaucracy.

关键词： perpetual peace kant sweet dream global community reason universal hospitality central authority globe of common ascent Federation of States global village globalization

用离子相互作用反相液相色谱在线样品预富集测定以氰基络合物存在的微量金(Ⅰ)

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世界核地质科学 1989年第2期18卷 84-90页

作者： P.R.Haddad n.e.Rochester 王德林

应用高效液相色谱在线样品预富集测定金(Ⅰ)的氰化物。利用32∶68乙腈—含有5 mM(毫克分子)四丁铵离子的水作为流动相,采用离子相互作用色谱法从C18柱上将络合物洗脱下来。进行紫外214 nm波长的吸收检测。样品通过一个经上述流动相处理... 详细信息

应用高效液相色谱在线样品预富集测定金(Ⅰ)的氰化物。利用32∶68乙腈—含有5 mM(毫克分子)四丁铵离子的水作为流动相,采用离子相互作用色谱法从C18柱上将络合物洗脱下来。进行紫外214 nm波长的吸收检测。样品通过一个经上述流动相处理的C18预柱而得到富集。从校正曲线的线性范围及预柱的离子保留容量方面讨论了离子相互作用试剂的选择。在最佳条件下,对最大体积达3ml的样品观察了氰亚金酸盐的定量结合。检测限为0.43 ppb。方法的精度对10 ppb量级的金,相对标准偏差为0.9％。采用的色谱条件适用于同时测定含有高浓度的游离氰酸撤离子的溶液中的超微量的Au(Ⅰ),Pd(Ⅱ)及Pt(Ⅱ)的氰基络合物。

关键词：预富集反相液相色谱样品量氰基最佳条件离子相互作用毫克分子预柱亚金校正曲线

约4900年前东亚和东南亚枢纽地区狩猎采集向农业的转变

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Science Bulletin 2024年第1期69卷 103-113页

作者：马敏敏卢敏霞孙瑞朱忠华 Dorian Q.Fuller 郭健新何光林杨晓敏谭玲玲芦永秀董佳佳刘睿良杨继帅李波郭天南李小瑞赵东月张颖王传超董广辉 key Laboratory of Western China’s environmental Systems(Ministry of education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Zhaotong University Zhaotong 657000China Westlake Laboratory of Life Sciences and Biomedicine Key Laboratory of Structural Biology of Zhejiang ProvinceSchool of Life SciencesWestlake UniversityHangzhou 310024China Institute of Basic Medical Sciences Westlake Institute for Advanced StudyHangzhou 310024China Yunnan Provincial Institute of Cultural Relics and Archaeology Kunming 650118China Institute of Archaeology University College LondonLondon WC1H 0PYUK School of Cultural Heritage Northwest UniversityXi’an 710069China State key Laboratory of Cellular Stress Biology School of Life SciencesXiamen UniversityXiamen 361102China Department of Anthropology and ethnology Institute of AnthropologySchool of Sociology and AnthropologyXiamen UniversityXiamen 361005China State key Laboratory of marine environmental Science Xiamen UniversityXiamen 361102China Westlake Omics(Hangzhou)Biotechnology Co. Ltd.Hangzhou 310024China The Department of Asia British MuseumLondon WC1E 7JWUK Tonghai Cultural Relics management Yuxi 652700China Group of Alpine Paleoecology and Human Adaptation Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State key Laboratory of Tibetan Plateau earth System Resources and EnvironmentBeijing 100101China Ministry of education key Laboratory of Contemporary Anthropology Department of Anthropology and Human GeneticsSchool of Life SciencesFudan UniversityShanghai 200433China

The southward expansion of east Asian farmers profoundly influenced the social evolution of Southeast Asia by introducing cereal ***,the timing and routes of cereal expansion in key regions are unclear due to limited empirical *** we report macrofossil,microfossil,multiple isotopic(C/n/Sr/O)and paleoproteomic data directly from radiocarbon-dated human samples,which were unearthed from a site in Xingyi in central Yunnan and which date between 7000 and 3300 a *** isotopes reveal the earliest arrival of millet ca.4900 a BP,and greater reliance on plant and animal agriculture was indicated between 3800 and 3300 a *** dietary differences between hunter-gatherer and agricultural groups are also evident in the metabolic and immune system proteins analysed from their skeletal *** results of paleoproteomic analysis indicate that humans had divergent biological adaptations,with and without *** combined application of isotopes,archaeobotanical data and proteomics provides a new approach to documenting dietary and health changes across major subsistence transitions.

关键词： Isotopes Proteomics Yunnan Millet Agricultural origins Human health

脂肪醇聚氧乙烯醚与脂肪醇混合单分子膜的稳定性

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四川大学学报（工程科学版） 2006年第3期38卷 65-69,75页

作者：杨红伟朱谱新阳建斌吴大诚四川大学纺织研究所四川成都610065

以脂肪醇聚氧乙烯醚(C18e20)分别与正辛醇、十二醇和十八醇组合作为非离子表面活性剂与极性有机物混合表面活性剂的模型物,采用LB膜分析仪测定了在空气-水界面上形成混合单分子膜的表面压,通过不同摩尔分数的脂肪醇与C18e20混合膜的π-... 详细信息

以脂肪醇聚氧乙烯醚(C18e20)分别与正辛醇、十二醇和十八醇组合作为非离子表面活性剂与极性有机物混合表面活性剂的模型物,采用LB膜分析仪测定了在空气-水界面上形成混合单分子膜的表面压,通过不同摩尔分数的脂肪醇与C18e20混合膜的π-A等温线,分析了混合膜在空气-水界面上的稳定性。实验结果表明,C18e20与不同脂肪醇的组合都可以提高混合膜的稳定性,表现在混合膜的表面压小于π-A曲线拐点时,液态扩张性变小,并且高于π-A曲线拐点后的曲线平台区缩短;随着脂肪醇摩尔分数的增加,或者脂肪醇链长与C18e20的疏水基链长越接近,混合膜稳定性增强。所有混合膜的π-A等温线在表面压30 mn/m附近出现拐点和平台区,表明混合膜在较高表面压下发生了相分离,而当十八醇与C18e20摩尔比为0.75∶0.25混合时,混合膜没有发生相分离,稳定性最好。

关键词：脂肪醇聚氧乙烯醚脂肪醇混合单分子膜稳定性空气-水界面

和厚朴酚通过激活Jnk信号通路强化TRAIL的抗肝细胞癌HepG2细胞作用的机制

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中华肝脏病杂志 2018年第6期26卷 441-445页

作者：肖嘎杨锐党玲董昌利西安医学院第二附属医院普外科 710038 故城县医院内五科衡水253800

目的研究和厚朴酚（Hnk）强化肿瘤坏死因子相关凋亡诱导配体（TRAIL）抗肝细胞癌HepG2细胞的作用及其机制。方法常规培养HepG2细胞，首先给予梯度浓度Hnk处理，观察其对肿瘤细胞活力的影响；Western blot法检测C-Jun氨基末端激酶（Jnk... 详细信息

目的研究和厚朴酚（Hnk）强化肿瘤坏死因子相关凋亡诱导配体（TRAIL）抗肝细胞癌HepG2细胞的作用及其机制。方法常规培养HepG2细胞，首先给予梯度浓度Hnk处理，观察其对肿瘤细胞活力的影响；Western blot法检测C-Jun氨基末端激酶（Jnk）、死亡受体4（DR4）、DR5表达水平变化。进而联合应用Hnk与TRAIL，观察联合用药对肿瘤细胞活力的影响；检测凋亡相关蛋白表达水平明确凋亡情况。然后采用Jnk抑制剂SP600125阻断Jnk通路，明确DR4、DR5水平变化是否由Jnk信号通路介导。最后构建裸鼠皮下肿瘤模型，明确在体内水平下，Hnk对TRAIL的强化效果。结果梯度浓度Hnk处理细胞后细胞活力剂量依赖性降低（P〈0．05）；联合应用TRAIL与Hnk效果优于单纯用药（P〈0．05）；蛋白检测发现，Hnk处理后pJnk水平上升，同时TRAIL受体DR4、DR5表达上调。联合应用Hnk与TRAIL后，B淋巴细胞瘤因子2（bcl2）显著下降而Bcl2相关X蛋白（Bax）显著升高。SP600125阻断Jnk通路后，与Hnk＋TRAIL组相比，DR4、DR5表达下降（P〈0．05），Bax表达下降而Bd2表达升高。在体内结果显示，TRAIL抑制了皮下肿瘤的生长，联合应用TRAIL与Hnk抑制作用增强。结论Hnk可能通过激活Jnk通路进而上调DR4、DR5表达来强化TRAIL对HeoG2细胞的抑制作用。

关键词：癌,肝细胞肿瘤坏死因子相关凋亡诱导配体和厚朴酚 c—Jun氨基末端激酶死亡受体

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比较经济制度学总览

世界经济与政治论坛 1983年第14期 32-38页

作者： e·n·纽伯尔格尔利广安武士国纽约州立大学

比较经济制度学,经历了一段不寻常的发展以后,成了一个颇引人注目的学科。其显著特点就在于它把经济制度及其机构,作为研究的中心,并且把这种制度看成是可变的来进行分析。相比之下,经济学领域的其它多数学科往往全然轻视这种制度上的考... 详细信息

比较经济制度学,经历了一段不寻常的发展以后,成了一个颇引人注目的学科。其显著特点就在于它把经济制度及其机构,作为研究的中心,并且把这种制度看成是可变的来进行分析。相比之下,经济学领域的其它多数学科往往全然轻视这种制度上的考虑,或者在某种特定的基础上,推论出一种制度的轮廓来。比较经济制度学把经济制度作为研究的焦点,并且把它看作是可变的来进行分析,并比较相关的制度。所有这些,使比较经济制度学成为经济学的一个重要分支。正如杰·丁伯根

关键词：经济计量学模型比较学理论家经济学理论计划经济制度信息传递情报传递决策方式丁伯根经济制度模式经济学领域苏联苏维埃社会主义共和国联盟

cagaand vacAHelicobacter pyloriPathogenicity Factors in Brazzaville, Congo

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Open Journal of Medical Microbiology 2019年第4期9卷 186-200页

作者： e. n. Ontsira ngoyi C. Guilloteau L. Benejat A. Mongo Onkouo A. Buissonnière e. Sifre A. Aloumba Tanguy Mieret F. Bossali F. Yala A. A. Abena J. Vadivelu k. L. Goh J. R. Ibara B. I. AtipoIbara A. Menard P. Lehours F. Megraud equipe 2 Helicobacter pylori infection inflammation and cancer Inserm U1053 Bordeaux university Bordeaux France Health Sciences Faculty Marien Ngouabi University Brazzaville Congo French national Reference Center for Helicobacters and Campylobacters Bordeaux France University of malaya Kuala Lumpur Malaysia Bacteriology laboratory Pellegrin University Hospital Bordeaux France

Introduction: Caga and VacA are the most important and well-studied virulence factors found in Helicobacter pylori. The aim of this work was to identify genes corresponding to H. pylori pathogenicity factors in Brazzaville, Congo. material & Methods: A cross-sectional study was carried out from October 2013 to December 2016. Biopsy specimens were obtained from patients scheduled for upper gastrointestinal endoscopy in Brazzaville, Congo and were sent to the French national Reference Center for Campylobacters and Helicobacters in Bordeaux, France. H. pylori detection was conducted by real-time PCR using a fuorescence resonance energy transfer-melting curve analysis protocol. The identification of the genes encoding pathogenicity factors was carried out by conventional PCR using the appropriate primers for determination of Caga phosphorylation motifs 1, 2, 3;and vacAs, I and m regions: vacAi1, vacAi2, vacAs1a, vacAs1b. Results: A high prevalence of H. pylori infection was reported (108/143;75.5%). In 92.2% (n = 71/77), the presence of P1, P2 and P3 Caga phosphorylation motifs was noted. Concerning vacA, vacAs1m1 was observed in 82% of the strains (n = 59/72). vacAi1 was present in all strains (n = 76). With regard to the distribution according to the vacAs1 subtype, the majority of the strains (59/71;83%) were vacAs1b positive, as compared to vacAs1c (17/34, 33%). The vacAs1a gene was absent in all of these patients. Conclusion: The presence of genes associated with severe gastric diseases indicates the importance of H. pylori eradication in the prevention of these diseases in Congo.

关键词： Pathogenicity Factors Caga VacA

magmatism and metamorphism at ca. 1.45 ga in the northern gawler Craton: The Australian record of rifting within nuna(Columbia)

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Geoscience Frontiers 2019年第1期10卷 175-194页

作者： Laura J.Morrissey karin M.Barovich martin Hand katherine e.Howard Justin L.Payne School of natural and Built environments University of South Australia Department of earth Sciences School of Physical Sciences University of Adelaide

U-Pb monazite and zircon geochronology and calculated metamorphic phase diagrams from drill holes in the northern gawler Craton, southern Australia, reveal the presence of ca. 1.45 ga magmatism and metamorphism. magmatism and granulite facies metamorphism of this age has not previously been recognised in the gawler Craton. The magmatic rocks have steep LRee-enriched patterns and high ga/Al values, suggesting they are A-type granites. Calculated metamorphic forward models suggest that this event was associated with high apparent thermal gradients and reached pressures of 3.2 -5.4 kbar and temperatures of 775-815℃. The high apparent thermal gradients may reflect pluton-enhanced metamorphism, consistent with the presence of A-type granites. The recognition of ca. 1.45 ga tectonism in the northern gawler Craton is added to a compilation of ca. 1.50 -1.40 ga magmatism, shear zone reactivation, rift basin development and isotope resetting throughout the South and north Australian Cratons that shows that this event was widespread in eastern Proterozoic Australia. This event is stylistically similar to ca. 1.45 ga A-type magmatism and high thermal gradient metamorphism in Laurentia in this interval and provides further support for a connection between Australia and Laurentia during the Mesoproterozoic. The tectonic setting of the 1.50-1.40 ga event is unclear but may record rifting within the nuna(or Columbia) supercontinent, or a period of intracontinental extension within a long-lived convergent setting.

关键词： gawler Craton Laurentia Metamorphism U-Pb geochronology Paleogeographic reconstruction

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薄层AVO效应

国外油气勘探 1999年第5期11卷 625-636页

作者： n.e.Bakke B.Ursin 张亚中朱汉东物探局研究院信息中心

由紧密排列的阻抗界面引起的调谐作用影响着地震振幅。在零炮检距处,当层厚减小时,合成反射信号的形状接近原始脉冲的时间导数。对于厚度小于调谐厚度一半的层来说,反射振幅被佃当于两倍于薄层时间厚度的因子修正。与炮检距有关的调谐... 详细信息

由紧密排列的阻抗界面引起的调谐作用影响着地震振幅。在零炮检距处,当层厚减小时,合成反射信号的形状接近原始脉冲的时间导数。对于厚度小于调谐厚度一半的层来说,反射振幅被佃当于两倍于薄层时间厚度的因子修正。与炮检距有关的调谐作用可用一次反射之间的时差来近似表示。在速度差异很大时,局部转换波也影响着总的反射地震响应。在多数情况下,层间多次波的影响可被忽略。在常规AVO分析前应对与炮检距有关的调谐效应进行校正。

关键词： AVD 炮检距地震响应地震勘探地震数据