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Communications in Theoretical Physics 2017年第5期67卷 554-560页

作者： Noreen Sher Akbar adil Wahid Butt DBS&h CEME National University of Sciences and Technology Islamabad Pakistan DBS&h MCE National University of Sciences and Technology Islamabad Pakistan

The study of heat transfer is of significant importance in many biological and biomedical industry *** investigation comprises of the study of entropy generation analysis of the blood flow in the arteries with permeable walls. The convection through the flow is studied with compliments to the entropy generation. Governing problem is formulized and solved for low reynold's number and long wavelength approximations. Exact analytical solutions have been obtained and are analyzed graphically. It is seen that temperature for pure water is lower as compared to the copper water. It gains magnitude with an increase in the slip parameter.

关键词： ferromagnetic Nano blood flow heat transfer permeable wall magnetic field entropy

Physiological Transportation of Casson Fluid in a Plumb Duct

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Communications in Theoretical Physics 2015年第3期63卷 347-352页

作者： Noreen Sher Akbar adil Wahid Butt DBS & h CEMENational University of Sciences and Technology

This paper is devoted to a study of the peristaltic motion of a Casson fluid of a non-Newtonian fluid accompanied in a horizontai *** characterize the non-Newtonian fluid behavior,we have considered the Casson fluid *** similarity transformations are utilized to transform the governing partial differential momentum into the non-linear ordinary differential *** analytical solutions of these equations are obtained and are the properties of velocity,pressure and profiles are then studied graphically.

关键词： Casson fluid peristalsis tube flow

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鳞片仿生制动盘散热性能研究

机械工程学报 2024年第6期60卷 354-362页

作者：周素霞巴馨悦王君艳李光曲直北京建筑大学机电与车辆工程学院北京100044 北京建筑大学城市轨道交通车辆服役性能保障北京市重点实验室北京100044

制动技术是影响列车提速的重要因素,制动盘散热能力是提高高速列车运行速度的重要参数。为了从结构上改善制动盘的散热能力,降低制动盘工作温度和热应力,结合仿生学,以鳞片为仿生原型,设计两种具有新结构的仿生制动盘。对比传统直辐板... 详细信息

制动技术是影响列车提速的重要因素,制动盘散热能力是提高高速列车运行速度的重要参数。为了从结构上改善制动盘的散热能力,降低制动盘工作温度和热应力,结合仿生学,以鳞片为仿生原型,设计两种具有新结构的仿生制动盘。对比传统直辐板制动盘,使用流体仿真软件模拟不同制动盘内流场情况,进而采用热机耦合方法,计算300 km/h初速度一次紧急制动工况下的制动盘温度及热应力结果。结果表明,新型鳞片仿生制动盘能加速制动盘内空气流通,提高制动过程中的对流换热系数;并降低制动盘的工作温度以及热应力,在一定程度上减小热载荷对于制动盘的影响。

关键词：高速列车盘型制动仿生学鳞片结构

神经内镜手术治疗高血压脑出血破入脑室的临床效果分析

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中国实用医药 2024年第16期19卷 48-51页

作者：丹巴高娃兴安盟人民医院 137400 兴安盟乌兰浩特市都林社区卫生服务中心内科 137400

目的观察高血压脑出血(hICh)破入脑室经神经内镜手术治疗的效果。方法选取hICh破入脑室患者70例,随机分为观察组(经神经内镜手术治疗)与对照组(经常规显微镜下手术治疗),各35例。对比两组血肿清除情况、临床指标、并发症发生情况、美国... 详细信息

目的观察高血压脑出血(hICh)破入脑室经神经内镜手术治疗的效果。方法选取hICh破入脑室患者70例,随机分为观察组(经神经内镜手术治疗)与对照组(经常规显微镜下手术治疗),各35例。对比两组血肿清除情况、临床指标、并发症发生情况、美国国立卫生研究院卒中量表(NIhSS)评分、barthel指数、预后情况。结果观察组患者术后1、3、7 d脑室内血肿清除率分别为(59.3±9.7)%、(71.2±15.5)%、(84.4±7.7)%,均高于对照组的(26.4±10.0)%、(51.1±14.4)%、(64.2±8.8)%(P0.05)。观察组手术时间为(1.5±0.1)h、出血量为(38.3±4.7)ml、引流时间为(3.6±1.4)d,对照组手术时间为(2.6±0.4)h、出血量为(46.1±5.8)ml、引流时间为(6.1±1.0)d。观察组手术时间、引流时间短于对照组,出血量少于对照组(PhSS评分为(14.9±2.2)分、barthel指数为(49.5±3.9)分,对照组NIhSS评分为(18.7±3.7)分、barthel指数为(43.7±2.9)分,观察组NIhSS评分低于对照组,barthel指数高于对照组(PhICh破入脑室患者脑室内血肿清除率,改善预后,并发症较少,价值较高。

关键词：高血压脑出血破入脑室并发症神经内镜血肿清除率预后临床指标

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瑞马唑仑在阻生牙拔除术中的应用

华西口腔医学杂志 2024年第4期42卷 476-480页

作者：巴凯倪端杜若冰魏雪琴郑州大学第一附属医院口腔医学中心郑州450000 武警河南总队医院麻醉科郑州450000

目的比较瑞马唑仑和咪达唑仑在阻生牙拔除术中的镇静效果,以期为牙科焦虑患者提供更加舒适的镇静治疗。方法采用前瞻性随机对照试验设计,将60例接受静脉镇静下颌阻生第三磨牙拔除术的患者平均分配到瑞马唑仑组或咪达唑仑组。患者在行神... 详细信息

目的比较瑞马唑仑和咪达唑仑在阻生牙拔除术中的镇静效果,以期为牙科焦虑患者提供更加舒适的镇静治疗。方法采用前瞻性随机对照试验设计,将60例接受静脉镇静下颌阻生第三磨牙拔除术的患者平均分配到瑞马唑仑组或咪达唑仑组。患者在行神经阻滞麻醉前使用瑞马唑仑或咪达唑仑进行预先镇静,记录并分析镇静起效、术后苏醒及完全恢复时间,手术前后改良牙科焦虑量表(MDAS)评分,医患满意度,术后24 h不良反应发生率,不同时间点心率(hr)和平均动脉压(MAP)的变化趋势。结果与咪达唑仑组相比,瑞马唑仑组患者的镇静起效、术后苏醒及完全恢复时间显著缩短,术后MDAS评分显著降低,医患满意度显著提高,术后不良反应发生率降低,但差异无统计学意义。结论瑞马唑仑起效和恢复更快,缓解牙科焦虑效果更好,医患满意度更高,在牙科焦虑患者镇静治疗时具有明显的优势。

关键词：瑞马唑仑咪达唑仑牙拔除术牙科焦虑

Circ_ZFYVE1对胰岛β细胞周期和自噬的影响

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海南医学院学报 2024年第17期30卷 1313-1320页

作者：牛晨巴涛孙媛常向云新疆石河子大学医学院第一附属医院内分泌代谢科新疆石河子832000

目的:观察Circ_ZFYVE1(cZFYVE1)对小鼠胰岛β细胞(MIN6)周期和自噬的影响。方法:Sanger测序分析验证cZFYVE1的环化位点;MIN6细胞分为正常组(NC,含葡萄糖浓度5.5 mmol/L)、高糖1组(hG1,含葡萄糖浓度15 mmol/L)和高糖2组(hG2,含葡萄糖浓度... 详细信息

目的:观察Circ_ZFYVE1(cZFYVE1)对小鼠胰岛β细胞(MIN6)周期和自噬的影响。方法:Sanger测序分析验证cZFYVE1的环化位点;MIN6细胞分为正常组(NC,含葡萄糖浓度5.5 mmol/L)、高糖1组(hG1,含葡萄糖浓度15 mmol/L)和高糖2组(hG2,含葡萄糖浓度25 mmol/L)进行培养48 h,qrT-PCr法检测NC组、hG1组和hG2组cZFYVE1表达水平;慢病毒转染实验构建空载体组(sh-NC)、稳定过表达cZFYVE1组(circ-ZFYVE1)和稳定敲低cZFYVE1组(si-cZFYVE1)。qrT-PCr法检测转染后各组MIN6细胞中cZFYVE1基因的表达量;流式细胞术检测各组细胞周期百分率;透射电子显微镜观察各组细胞自噬小体和细胞器的变化;免疫荧光法检测各组细胞自噬相关蛋白Beclin-1荧光强度;Western Blot法检测各组细胞周期调节蛋白Cyclin D1以及自噬相关蛋白Beclin-1、P62和LC3-Ⅱ的表达水平。结果:Sanger测序证实cZFYVE1存在环化剪接位点。qrT-PCr结果显示,与NC组相比,hG1组和hG2组cZFYVE1表达水平降低,hG2组cZFYVE1水平较hG1组表达降低(Ph-NC组比较,circ-ZFYVE1组cZFYVE1表达升高,si-cZFYVE1组cZFYVE1表达降低(Ph-NC组比较,circ-ZFYVE1组G1期细胞百分率降低,S期细胞百分率升高,G2期细胞百分率升高,si-cZFYVE1组G1期细胞百分率升高,S期细胞百分率降低,G2期细胞百分率降低(Ph-NC组比较,si-cZFYVE1组自噬体减少。免疫荧光结果显示,与sh-NC组比较,circ-ZFYVE1组自噬相关蛋白Beclin-1免疫荧光强度升高,si-cZFYVE1组Beclin-1免疫荧光强度降低(Prn blot结果显示,与sh-NC组比较,circ-ZFYVE1组细胞周期调节蛋白Cyclin D1表达水平升高,自噬相关蛋白Beclin-1、LC3-Ⅱ表达水平升高,P62表达水平降低,si-cZFYVE1组Cyclin D1蛋白表达水平降低,Beclin-1、LC3-Ⅱ蛋白表达水平降低,P62蛋白表达水平升高(Prc_ZFYVE1可能促进MIN6胰岛β细胞自噬并影响细胞周期。

关键词： Circ_ZFYVE1 胰岛β细胞细胞周期自噬

Kaapvaal lamproite melts(aka orangeites):A new type of alkalicarbonate liquid?insights from olivine-hosted multiphase inclusions(Silvery home,South Africa)

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Geoscience Frontiers 2024年第5期15卷 308-322页

作者： Adam Abersteiner Alexey Tarasov Alexander Golovin Geoffrey h.howarth Vadim S.Kamenetsky Department of Geosciences and Geography Research Programme of Geology and Geophysics(GeoHel)University of HelsinkiFinland Institute for Sustainability Energy and ResourcesThe University of AdelaideAdelaide SA-5005Australia Department of Earth Sciences School of Physical SciencesThe University of AdelaideAdelaide SA-5005Australia V.S.Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of SciencesRussia Department of Geological Sciences University of Cape TownRondebosch 7701South Africa Center of Deep Sea research Institute of OceanologyChinese Academy of Sciences266071 QingdaoChina

Kaapvaal lamproites(aka orangeites)are a group of volatile-rich(h_(2)O,CO_(2)),micaceous,ultrapotassic igneous rocks that are unique to the Kaapvaal craton in southern ***,the composition of the melts that give rise to these rocks remains poorly understood due to overprinting effects of contamination by mantle and crustal material,volatile exsolution,fractional crystallisation and post-magmatic ***,this lack of reliable data on the initial composition of the Kaapvaal lamproite melts hampers our understanding of their source,petrogenesis and ascent *** is a common mineral comprising the Kaapvaal lamproites that has both xenocrystic(i.e.,mantle)and magmatic *** inclusions(melt/fluid)entrapped within olivine have been consistently demonstrated as an effective tool for gaining fundamental insights into the composition and evolution of melts that produce both kimberlites and lamproites,prior to processes,such as eruption,devolatization and syn-/post-magmatic *** this study,multiphase inclusions of both secondary and pseudosecondary origin hosted in olivine from a Kaapvaal lamproite(Silvery home,South Africa)provide novel insights into the composition of the melt(s)that initially transported olivine to the surface and then crystallised after emplacement to form the lamproite *** inclusions in our study contain daughter mineral assemblages consisting of diverse Ca-Mg carbonates,including K-,Na-,ba-,and Sr-bearing varieties,moderate K-rich silicates(phlogopite,tetraferriphlogopite),and subordinate oxides,phosphates,sulphides,sulphates,and *** on these daughter mineral assemblages,we suggest that the composition of the melt entrapped by olivine was SiO_(2)-poor,Ca-Mg carbonate-rich and contained elevated concentrations of K,Na,ba,Sr,P and *** mineral and reconstructed melt compositions are in stark contrast to the mineral association of the groundmass and the bulk-rock composition

关键词： Lamproite Kaapvaal Multiphase inclusions Olivine Orangeite

摩尔比对MMOS水泥力学性能和变形行为的影响及机理

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建筑材料学报 2024年第8期27卷 733-743页

作者：巴明芳马哲洋纪璐鑫崔嘉铭柳俊哲宁波大学土木工程与地理环境学院浙江宁波315211 青岛农业大学建筑工程学院山东青岛266109

研究了原材料摩尔比(n(MgO)∶n(MgSO_(4))∶n(h_(2)O))对改性硫氧镁(MMOS)水泥力学性能和变形行为的影响,并采用X射线衍射仪(XrD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIr)及热重分析(TG)等测试技术对其机理进行分析.结果表明:MMOS水... 详细信息

研究了原材料摩尔比(n(MgO)∶n(MgSO_(4))∶n(h_(2)O))对改性硫氧镁(MMOS)水泥力学性能和变形行为的影响,并采用X射线衍射仪(XrD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIr)及热重分析(TG)等测试技术对其机理进行分析.结果表明:MMOS水泥的抗压强度和抗折强度随着水硫比和氧硫比的提高均呈提升趋势.其中原材料摩尔比为10∶1∶12时,水泥力学性能最优.不同摩尔比MMOS水泥在56d龄期内均呈膨胀变形,其中总变形随水硫比和氧硫比的提高呈减小趋势;自收缩变形随水硫比的提高而减小,随氧硫比的提高呈先增后减趋势.这主要是由于硬化后不同摩尔比MMOS水泥中的水化产物Mg(Oh)_(2)和5·1·7相(5Mg(Oh)_(2)·MgSO_(4)·7h_(2)O)含量各有不同.当Mg(Oh)_(2)含量减少,而5·1·7相含量增加时,MMOS水泥的膨胀变形量降低,同时其抗折强度和抗压强度有所提升.

关键词：摩尔比改性硫氧镁水泥力学性能体积变形机理分析

A tribo-chemical view on astringency of plant-based food substances

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Friction 2024年第7期12卷 1392-1407页

作者： Samuel S.GAMANIEL Paloma S.DUEÑAS rOBLES hans TrOMP Els h.A.de hOOG Sissi de BEEr Emile van der hEIDE Laboratory for Surface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 LWthe Netherlands NIZO Food research B.V. Ede6710 BAthe Netherlands Department of Molecules and Materials MESA+Institute for Nanotechnology University of TwenteEnschede 7500 AEthe Netherlands

Consumption of plant-based food products having high composition of polyphenols leads to the sensation of *** sliding oral surfaces,friction is an essential property during the oral perception of roughness and dryness which are attributes associated with *** factors including the chemical composition of interacting layers,structure and operation of interfaces have an effect on the astringency development *** manner of interactions occurring at oral interfaces suggest there is a system dependence of astringency and highlights the importance of adopting a tribosystems *** measurement techniques have shown an existing relationship between salivary protein-polyphenol interaction and an astringent ***,the tribo-chemistry involved in this multifaceted sensation remains largely unexplored in a comprehensive *** this review the underlying tribo-chemical processes useful in understanding the mechanism of astringency are highlighted and discussed considering current techniques employed to investigate astringency *** of lubrication on oral surfaces owing to the tribo-chemical interactions involving saliva and astringent plant proteins requires subsequent deformations of oral tissues which are significant enough to induce strains at mechanoreceptor locations,leading to the sensation of *** is proposed that micro-scale contact modelling on the interaction of food particles/aggregates,boundary layers and oral surfaces shows potential in addressing the knowledge gap between tribo-chemical measurement techniques and panel tests,making it possible to attain a predictor for astringency.

关键词： oral lubrication astringency tribo-chemistry tribology

Cetyltrimethylammonium chloride(CTAC)catalyzed one-pot synthesis of novel coumarin-4h-pyran conjugates in aqueous media

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Chinese Chemical Letters 2017年第5期28卷 976-980页

作者： adil Omar Keyume Ablajan Mawjvda hamdulla Key Laboratory of Oil&Gas Fine Chemicals Ministry of Education&Xinjiang Uyghur Autonomous RegionCollege of Chemistry and Chemical EngineeringXinjiang UniversityUrumqi 830046China

Novel fluorescent coumarin-4h-pyran conjugates were achieved by three-component reactions of various synthetic β-ketoesters with aldehydes and malononitrile in aqueous *** mild reaction conditions,operational simplicity,absence of tedious separation procedures,using of inexpensive and nontoxic commercially available cationic surfactant cetyltrimethylammonium chloride（CTAC） as a catalyst are the prominent advantage of this method.

关键词： Coumarin 4h-Pyran Multicomponent reaction CTAC Aqueous media Surfactant catalyzed