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Journal of Geoscience and Environment Protection 2024年第1期12卷 180-210页

作者： Bah-Yero Liman Ngounouno Ismaïla Mbowou Gbambié Isaac Bertrand Alpha Baster Kenfack Fokem André William Boroh Amadou Diguim Kepnamou Department of Earth Sciences Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon Department of Mining Geology School of Geology and Mining and Engineering University of Ngaoundéré Meiganga Cameroon Department of Earth Sciences Faculty of Science University of Garoua Garoua Cameroon

The aim of this study of the spatial dispersion of tin, niobium and tantalum mineralization associated with the Mayo Darlé granitoids was to produce prospecting guides through predictive maps of Sn, Nb and Ta in the region. It was based on a database (in appendix) obtained after analysis of rock samples (greisens and quartz veins) collected in the field, using a portable X-ray fluorescence (XRF) spectrometer. Two approaches were used: 1) structural studies in the field using the directions of veins and fractures 2) the use of variographic maps, an essential element in geostatistics for determining directional anisotropies. A joint synthesis of the modelling results shows that tin, tantalum and niobium mineralization at Mayo Darlé is concentrated along strike intervals N315E to N320E, with mineralization also occurring along strike N35E for high-grade Sn, medium-grade Ta and low-grade Nb. In short, mineral concentrations disperse progressively in space: positively from east to west for tantalum and niobium, and inversely for tin.

关键词： Mayo Darlé Tin Niobium Tantalum Geostatistics Mapping

大别造山带宿松杂岩中石榴斜长角闪岩变质演化过程、原岩时限及其构造涵义

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岩石学报 2024年第1期40卷 140-158页

作者：腊晓峰石永红王娟周安泰合肥工业大学资源与环境工程学院合肥230009

大别造山带是由扬子板块向华北板块俯冲碰撞而形成的,出露了世界上规模最大的、种类最齐全的各类超高压岩石,全面深刻地记录了大陆深俯冲过程。然而,对于该造山带“浅层”(地壳层次)俯冲折返过程的研究则较少涉及,这制约了对大别造山带... 详细信息

大别造山带是由扬子板块向华北板块俯冲碰撞而形成的,出露了世界上规模最大的、种类最齐全的各类超高压岩石,全面深刻地记录了大陆深俯冲过程。然而,对于该造山带“浅层”(地壳层次)俯冲折返过程的研究则较少涉及,这制约了对大别造山带形成全过程的整体理解。为此,本次研究以大别造山带最南缘经历绿帘-角闪岩变质的宿松杂岩为研究靶区,针对该杂岩别河地区的石榴斜长角闪岩展开了精细的岩相学、矿物化学、温压评价和年代学研究。研究表明,该岩石记录了三个变质阶段,其中第二阶段可进一步分为a和b两个亚阶段,具体的变质温压条件分别为:①阶段Ⅰ:T=562±12℃、P=1.03±0.05GPa;②阶段Ⅱ-a:T=663±8℃、P=1.09±0.04GPa;③阶段Ⅱ-b:T=508~584℃、P_(-设定)=0.5~0.7GPa;④阶段Ⅲ:T=396~472℃、P_(-设定)=0.1~0.3GPa。其中,①→②表现为近等压增温型式,反映了一个俯冲迟滞过程,暗示了“浅层”俯冲止于莫霍面附近,并受下伏岩石地幔热源供给导致其持续增温,而②→③→④则显示降温降压样式,表现为缓慢抬升的过程。显然,大别造山带“浅”地壳层次的俯冲属于“暖”俯冲类型,并表现为一个缓慢变质演化过程,明显不同于大别造山带“冷”俯冲类型的大陆深俯冲的快速演化过程。锆石U-Pb年代学研究显示,石榴斜长角闪岩的锆石均为具振荡环带结构,测定的37个谐和年龄范围数据范围为1470±80Ma~1258±101Ma,Th/U比值均大于0.4,加权平均年龄为1381±25Ma,该年龄应为其原岩结晶年龄,代表了哥伦比亚超大陆最终裂解时限。此外,侵入于石榴斜长角闪岩中的富石英花岗岩的加权平均年龄为129±5Ma,反映了中国东部中生代伸展事件。结合前人的年龄资料,可以推测1.38~1.30Ga为哥伦比亚超大陆向罗迪尼亚超大陆转换的时间节点。同时,可以明确宿松杂岩则是由不同时代、不同岩石类型构成的单元,是探究扬子板块自新太古代至中生代漫长复杂的演化过程最佳的场所变质单元。

关键词：宿松杂岩石榴斜长角闪岩中元古代 P-T轨迹金红石Zr温度计

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新企业会计准则对会计信息化建设的影响研究

市场周刊 2024年第10期37卷 117-120页

作者：卓拉内蒙古鸿德文理学院内蒙古呼和浩特010070

会计信息化是指利用现代信息技术手段开展会计核算和管理的过程,是会计工作的重要组成部分。财政部自2006年以来陆续颁布的一系列会计准则,对会计信息化建设提出了新的要求,也带来了新的机遇和挑战。文章系统地探讨了新企业会计准则对... 详细信息

会计信息化是指利用现代信息技术手段开展会计核算和管理的过程,是会计工作的重要组成部分。财政部自2006年以来陆续颁布的一系列会计准则,对会计信息化建设提出了新的要求,也带来了新的机遇和挑战。文章系统地探讨了新企业会计准则对会计信息化建设的影响,分析了新准则下会计信息化建设面临的挑战,以推动新会计准则下会计信息化建设的新发展。文章认为,新企业会计准则对会计信息化建设的影响是多方面的,既有积极的一面,也有消极的一面。会计信息化建设要适应新企业会计准则的要求,加强系统升级和改造,加大人力资源培训和发展力度,优化风险管理和内部控制,提高会计信息的质量和效益。

关键词：新企业会计准则会计信息化影响分析

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西藏自治区科技创新工作指标体系和考核标准研究

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产业科技创新 2024年第3期6卷 22-25页

作者：拉巴西藏大学西藏拉萨850000

本文在对西藏科技创新工作指标体系构建理论认识的基础上,对比指标体系理论做出进一步分析,提出了在构建西藏科技创新工作指标体系时所应体现的价值标准以及构建西藏科技创新工作评价指标体系所要达到的目标,为进一步优化西藏科技管理... 详细信息

本文在对西藏科技创新工作指标体系构建理论认识的基础上,对比指标体系理论做出进一步分析,提出了在构建西藏科技创新工作指标体系时所应体现的价值标准以及构建西藏科技创新工作评价指标体系所要达到的目标,为进一步优化西藏科技管理体制、检验科技发展的问题和成就寻找完善路径。

关键词：科技发展科技创新考核标准

A comprehensive review of genetic causes of obesity

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World Journal of Pediatrics 2024年第1期20卷 26-39页

作者： Marcio Jose Concepcion-Zavaleta Juan Eduardo Quiroz-Aldave Maria del Carmen Durand-Vasquez Elman Rolando Gamarra-Osorio Juan del Carmen Valencia de la Cruz Claudia Mercedes Barrueto-Callirgos Susan Luciana Puelles-Leon Elena de Jesus Alvarado-Leon Frans Leiva-Cabrera Francisca Elena Zavaleta-Gutierrez Luis Alberto Concepcion-Urteaga Jose Paz-Ibarra Universidad Cientifica del Sur Bolivar 2150 AvenuePueblo Libre15084LimaPeru Division of Medicine Hospital de Apoyo ChepénChepenPeru Division of Family Medicine Hospital de Apoyo ChepénChepenPeru Division of Endocrinology Hospital Victor Lazarte EchegarayTrujilloPeru Division of Pediatrics Hospital de Apoyo ChepenChepenPeru Division of Internal Medicine Hospital de Apoyo ChepenChepenPeru Division of Genetics Universidad Nacional de TrujilloTrujilloPeru Division of Neonatology Hospital Belen de TrujilloTrujilloPeru Division of Internal Medicine Universidad Nacional de TrujilloTrujilloPeru Department of Medicine School of MedicineUniversidad Nacional Mayor de San MarcosLimaPeru

Background Obesity is a multifactorial chronic disease with a high,increasing worldwide *** causes account for 7%of the cases in children with extreme *** sources This narrative review was conducted by searching for papers published in the PubMed/MEDLINE,Embase and SciELO databases and included 161 *** search used the following search terms:"obesity","obesity and genetics","leptin","Prader-Willi syndrome",and"melanocortins".The types of studies included were systematic reviews,clinical trials,prospective cohort studies,cross-sectional and prospective studies,narrative reviews,and case *** The leptin-melanocortin pathway is primarily responsible for the regulation of appetite and body ***,several important aspects of the pathophysiology of obesity remain *** causes of obesity can be grouped into syndromic,monogenic,and polygenic causes and should be assessed in children with extreme obesity before the age of 5 years,hyperphagia,or a family history of extreme obesity.A microarray study,an analysis of the melanocortin type 4 receptor gene mutations and leptin levels should be performed for this *** are three therapeutic levels:lifestyle modifications,pharmacological treatment,and bariatric *** Genetic study technologies are in constant development;however,we are still far from having a personalized approach to genetic causes of obesity.A significant proportion of the affected individuals are associated with genetic causes;however,there are still barriers to its approach,as it continues to be underdiagnosed.

关键词： Leptin Melanocortin Obesity Prader-Willi syndrome Precision medicine

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小型质子转移反应质谱仪离子源的设计与优化

分析试验室 2024年第6期43卷 819-827页

作者：陈蹇平王俊闻路红陈腊宁波大学宁波高等技术研究院宁波315211 宁波华仪宁创智能科技有限公司宁波315100 广州市华粤行仪器有限公司广州511400

作为一种快速、高灵敏的挥发性有机物(VOCs)检测技术,质子转移反应质谱(PTR-MS)被越来越多地应用于环境、医学、公共安全等领域。作为PTR-MS的关键部件之一,空心阴极辉光放电离子源对仪器性能具有重要影响。本文通过有限元仿真优化了空... 详细信息

作为一种快速、高灵敏的挥发性有机物(VOCs)检测技术,质子转移反应质谱(PTR-MS)被越来越多地应用于环境、医学、公共安全等领域。作为PTR-MS的关键部件之一,空心阴极辉光放电离子源对仪器性能具有重要影响。本文通过有限元仿真优化了空心阴极结构,在阴极内径为20 mm、阳极与阴极间隙为4 mm时,离子源放电效果较好。将优化后的空心阴极辉光放电离子源与便携式质谱仪联用,并测试了离子信号与放电气压和放电电流的关系。结果表明,最佳放电气压约为200 Pa,最佳放电电流为9~13 m A。采用乙腈样品测试了仪器性能,系统响应时间在10 s以内,乙腈检出限约为10^(-9)(V/V),线性范围为50×10^(-9)~350×10^(-9)(V/V),线性相关系数R^(2)=0.991。利用该装置检测了苹果发酵过程中产生的VOCs随时间的变化,证明了该仪器可用于实际样品检测。

关键词：质子转移反应质谱空心阴极辉光放电离子源挥发性有机物线性离子阱有限元仿真

UHPLC-MS/MS法测定不同周期蒙药文冠木枝和叶中8个成分的对比研究

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药物分析杂志 2024年第9期44卷 1497-1503页

作者：布仁满达吴杰斯敖敦格日乐黄格尔柱拉胡阿荣其日格尔拉喜那木吉拉内蒙古民族大学国家药监局中药(蒙药)质量控制重点实验室通辽028000 内蒙古民族大学附属医院通辽028000

目的:建立UHPLC-MS/MS测定方法测定蒙药文冠木枝和叶中儿茶素、表没食子儿茶素、芦丁、槲皮苷、表儿茶素、二氢杨梅素、杨梅苷和二氢槲皮素的不同周期含量对比研究。方法:采用WATER-SCORTECS反相C_(18)(100 mm×2.1 mm;1.6μm)色谱柱,以... 详细信息

目的:建立UHPLC-MS/MS测定方法测定蒙药文冠木枝和叶中儿茶素、表没食子儿茶素、芦丁、槲皮苷、表儿茶素、二氢杨梅素、杨梅苷和二氢槲皮素的不同周期含量对比研究。方法:采用WATER-SCORTECS反相C_(18)(100 mm×2.1 mm;1.6μm)色谱柱,以0.1%甲酸水溶液为流动相A,乙腈为流动相B,梯度洗脱(0~1 min,5%B;1~10 min,5%B→28%B;10~11 min,28%B→95%B;11~14 min,95%B;14~15 min,95%B→5%B),柱温40℃,流速0.3 mL·min^(-1),进样体积2μL,多反应监测(MRM)方法中选择负离子进行检测。结果:在测定的浓度范围内8个化学成分线性关系良好(r>0.9976),精密度、重复性和稳定性良好,平均加样回收率为97.4%~106.0%,RSD≤5.0%。6批叶样品中8个成分测定结果分别为0.090~0.904 mg·g^(-1)、0.093~2.258 mg·g^(-1)、0.001~0.005 mg·g^(-1)、0.530~6.176 mg·g^(-1)、0.158~1.561 mg·g^(-1)、0.002~0.056 mg·g^(-1)、4.008~10.218 mg·g^(-1)和1.049~16.990 mg·g^(-1),枝中8个成分测定结果分别为0.384~1.025 mg·g^(-1)、0.911~2.427 mg·g^(-1)、0.008~0.127 mg·g^(-1)、0.870~2.295 mg·g^(-1)、0.659~1.746 mg·g^(-1)、0.125~1.079 mg·g^(-1)、2.296~4.681 mg·g^(-1)和1.958~4.946 mg·g^(-1)。含量测定结果显示8个成分在文冠木不同部位中的含量存在较大差异,叶中杨梅苷、芦丁、槲皮苷随生长周期变化明显,可作为文冠木叶质量控制的主要指标。结论:该方法准确度和灵敏度高,且稳定性和重复性好,适用于蒙药文冠木药材中8个成分的同时检测,为枝和叶的质量控制提供实验基础。

关键词：文冠木枝和叶化学成分定量分析超高效液相串联质谱多反应监测

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1666年伦敦大火后难民的安置与流动

世界历史评论 2024年第1期11卷 49-67,292页

作者：李腊安徽农业大学外国语学院安徽农业大学区域国别研究中心办公室

1666年伦敦大火的发生,深刻考验着伦敦乃至英国应对突发事件的能力。火灾后,成千上万的难民无家可归,社会秩序混乱,如何安顿这些难民显得尤为迫切。国家和市政一方面需要解决其住房和饮食问题;另一方面需要给予其心理抚慰和恢复公信力... 详细信息

1666年伦敦大火的发生,深刻考验着伦敦乃至英国应对突发事件的能力。火灾后,成千上万的难民无家可归,社会秩序混乱,如何安顿这些难民显得尤为迫切。国家和市政一方面需要解决其住房和饮食问题;另一方面需要给予其心理抚慰和恢复公信力。许多难民重新寻找定所,发生大规模流动。本文以商人泰勒和书商群体为例,勾勒这些群体的流动状况。难民们向伦敦郊区及周边地区的迁移,促成了伦敦人口的重新分配。由此可以窥探出这场大火灾对伦敦社会和经济的巨大影响。

关键词：伦敦大火难民安置火灾应对人口流动

Physiological Traits of Durum Wheat (<i>Triticum durum</i>Desf.) and Bread Wheat (<i>Triticum aestivum</i>L.) Genotypes under Drought Stress

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Agricultural Sciences 2015年第8期6卷 848-859页

作者： tofig I. a.la.verdiyev Plant Physiology and Biotechnology Department Research Institute of Crop Husbandry Baku Azerbaijan

We aimed to study impact of drought stress on physiological traits of field grown 8 durum and 14 bread wheat genotypes. Drought caused decrease of leaf gas exchange parameters—photosynthesis rate (Pn), stomatal conductance (gs), and transpiration rate (E), an increase of intercellular CO2 concentration (Ci). Area (la) and dry mass of leaves per stem, leaf area index (laI) of genotypes significantly reduced from booting to watery ripe stages. Water deficiency led to a decrease of chlorophyll a, b (Chla,b) and carotenoids (Car (x+c) content, relative water content (RWC). Water stress more affected on la than leaf dry mass of wheat genotypes, leaf specific mass (LSM) increased. The Chl(a+b) content, Pn and yield of bread wheat genotypes were relatively higher than durum wheat ones. Physiological traits may be reliable for selection of drought tolerant wheat genotypes.

关键词： Wheat Photosynthesis Rate Stomatal Conductance Chlorophyll Water Stress

Geochemical and Petrological Insights into the Neoproterozoic Moumba Metabasites: Implications for Crustal Processes in the West Congo Belt (Republic of Congo)

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Journal of Geoscience and Environment Protection 2024年第2期12卷 1-29页

作者： Ulrich Verne Matiaba-Bazika Nelson Lekeba Makamba Vicky Tendresse Télange Bouénitéla Nicy Carmelle Bazebizonza Tchiguina Timothée Miyouna Florent Boudzoumou laboratory of Geosciences Faculty of Sciences and Technics Marien NGOUABI University Brazzaville Republic of Congo National Institute for Research in Exact and Natural Sciences (IRSEN) Brazzaville Republic of Congo Geographid Research and Cartographic Production Center (CERGEC) Brazzaville Republic of Congo

The West Congo Belt contains in its rocks of Neoproterozoic age from Nemba complex outcropping in the Moumba River. This West Congo belt is made up of a crustal segment of the Arcuaï-West Congo orogen which extends from southwest Gabon to the northeast of Angola. This study aims to constrain the geochemical signature Nemba complex of West Congo belt from the petrograhic and geochemical study on the whole rock. The petrographic data from this study show the Moumba metabasites are made up of amphibolites, metagabbros, epidotites and greenschists interstratified in the Eburnean metasediments and affected by mesozonal to epizonal metamorphism characterized by the retromorphosis of intermediate amphibolite facies minerals into greenschist facies. Whole-rock geochemical data indicate that these metabasites are continental flood basalts (CFB) of basic nature and transitional affinity emplaced in intraplate context. These continental flood basalts are generated from magma originating from a significantly enriched shallow mantle plume and this magma then contaminated by the continental crust during their ascent. The reconstruction of tectonic signature suggests that West Congo belt would result from closure of an ocean basin with subduction phenomena. This collision would be marked by the establishment of ophiolite complex. We show that this model is incompatible with the CFB nature of metabasites and the orogenic evolution of Neoproterozoic. It does not seem that we can evoke a genetic link with a subduction of oceanic crust, because the paleogeography of Neoproterozoic (Rodinia) is marked by intracontinental rifts linked to opening of Rodinia. We therefore suggest the non-existence of ophiolitic complex in western Congo belt and reject the collisional model published by certain authors. We confirm the currently available intracontinental orogen model.

关键词： Mayombe Metabasites Moumba Mantle Plume Continental Rifting Basalts Flood Continental