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Microstructure, Dislocation Density and Thermal Expansion Behavior Using Thermo Elastic Models of Zircon Sand Reinforced as Cast ZA-27 Composites

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Journal of Minerals and Materials Characterization and Engineering 2021年第1期9卷 100-115页

作者： G. R. Gurunagendra v. Bharat B. R. raju D. G. Amith vijayakumar pujar C. Ravi Keerthi Global Academy of Technology Bangalore India The Oxford College of Engineering Bangalore India

In the present work stir casting route is used to fabricate the ZA27 Metal matrix composites containing 3 wt%, 6 wt%, 9 wt%, and 12 wt%. Zircon sand particulates of size 100 mesh. Microstructure studies using Optical Microscopy, SEM-EDAX are carried out to ascertain the distribution and morphology of particulates in the composites. Effect of zircon sand as reinforcement on bulk density, porosity, of the fabricated composites is studied. SEM studies are carried out to understand the behavior of as-cast ZA27 alloy reinforced with zircon sand. The dislocation density of the fabricated composite affects the strength of the composites and depends on the strain due to thermal mismatch and is found to increase with increase in weight% of zircon sand. However, it does not consider casting defects of voids/clustering observed in micrographs of the fabricated composite. porosity in composites does not have influence on Coefficient of thermal expansion (CTE) of the ZA27 composites studied using thermoelastic models like Kerner and turner model and rule of mixtures of composite.

关键词： Density porosity Dislocation Density Thermoelastic Models Rule of Mixtures

Evidence on antimicrobial activity of essential oils and herbal extracts against Yersinia enterocolitica - A review

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Food Bioscience 2022年第3期47卷 132-144页

作者： Andrea Durofil Naga raju Maddela Reinier Abreu Naranjo Matteo Radice Area de Botánica Del Departamento de Biología y producción de los vegetales Facultad de CienciasUniversidad de ExtremaduraBadajozSpain Departamento de Ciencias Biológicas Facultad la Ciencias de la SaludUniversidad Técnica de ManabíPortoviejoEcuador Instituto de Investigación Universidad Técnica de ManabíPortoviejoEcuador Universidad Estatal Amazónica Km 2 ½ Vía Puyo-TenaPuyoEcuador

Yersinia enterocolitica is a very common food-borne pathogen which causes gastrointestinal infections (yersiniosis) in humans and a wide array of animals (***,deer,pigs,and birds).Due to the increasing interest in innovative plant-based substances as common food preservatives,several essential oils and herbal extracts have been investigated deeply that resulted in the emergence of novel anti-Yersinia *** reviewed relevant work done by 53 researchers covering literature from the year 2002 to till *** species such as Origanum vulgare ,Rosmarinus officinalis ,Thymus vulgaris ,Ocimum basilicum have been extensively investigated and identified that 1,8-cineole,linalool and γ-terpinene as compounds found in the essential oils of these plants have anti-Yersinia activity active food packaging *** the same direction,some promising results have been mentioned about the herbal extracts of Murrya koenigii ,Tanacetum vulgare and Tanacetum balsamita,but further investigations are needed for their sustainable *** to hierarchical cluster analysis,we found that Lamiaceae and Lauracea as the most significant families with anti-Yersinia *** the end,we proposed new research trends in order to enhance a global knowledge about the use of natural products against *** .

关键词： Food-borne pathogens plant-based alternatives Food preservation Active packaging

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自然吸气直列3缸柴油机冷却系统的优化

汽车与新动力 2015年第6期47卷 50-53页

作者： v.Kale B.raju v.Dhiman 孙丹红

通过增大发动机的缸径和行程,以及其他设计改造来提升发动机的功率。通过优化冷却水套设计和水泵流量参数解决与冷却有关的问题。在保持发动机机体外形尺寸不变的情况下增大缸径会导致气缸体和气缸套之间的冷却水套减小,从而导致热负荷... 详细信息

通过增大发动机的缸径和行程,以及其他设计改造来提升发动机的功率。通过优化冷却水套设计和水泵流量参数解决与冷却有关的问题。在保持发动机机体外形尺寸不变的情况下增大缸径会导致气缸体和气缸套之间的冷却水套减小,从而导致热负荷增加,采用优化冷却水套和改造水泵设计。来提高发动机的冷却能力。内燃机冷却系统包括具有复杂结构的水套。针对这些复杂的系统,计算流体动力学(CFD)模拟在短时间内就可以完成。CFD理论上具有模拟任何物理条件的能力。针对1款直列3缸水冷式柴油机,采用STAR CCM+软件8.04版本进行了有效优化。通过k-ε湍流模型,研究了冷却水流速和温度分布。采用UG NX 7.5软件对气缸体和气缸盖进行了模拟。

关键词：优化气缸体气缸盖冷却系统 CFD模拟

Studies on Recovery Efficiencies of phenols from phenol Fraction Using Alkali Treatment

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Journal of Chemistry and Chemical Engineering 2013年第4期7卷 334-339页

作者： S. Aruna Kumari Goruganthula venkata Subrahmanya Sarma G. M. J. raju J. v. S. Murty C. BhaskaraSarma Department of Chemical Engineering College of Engineering (A) Andhra University Visakhapatnam 530 003 India Department of Chemical Engineering G V P College of Engineering (A) Visakhapatnam 530 052 India Gayatri vidya parishad College of Engineering for Women k2sakhapatnam 530 052 India

Experiments were conducted for the extraction of phenols from the phenol fraction obtained from the coal tar distillate. The phenol fraction for the present investigation has been procured from visakhapatnam Steel plant, visakhapatnam whose composition is known. The phenol fraction from coal tar distillate can be treated for extracting phenols using caustic soda. An attempt has been made to find out whether the existing practice of using only 8%-15% can be modified by increasing the strength of sodium hydroxide and also explore the possibilities of substituting the sodium hydroxide with KOH as an extractant. The different streams of liquids obtained during experimentation have been analyzed by gas chromatograph. Salient features of the study are that higher concentrations of the alkali significantly improved the separation efficiencies of phenols and also regenerate the phenolate with higher phenol content. Increase in the alkali strength has greatly improved the separation as well as the phenol content in the regenerated phenols. Disposal of effluents containing phenols may lead to environmental problem of ground water pollution and the study throws a light on the removal of phenols from the effluents to the extent possible by using higher strength alkali solutions.

关键词： Alkali treatment phenol phenol fraction recovery efficiency coal tar.

Effect of Ca on the properties of Gd-Doped Ceria for IT-SOFC

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Journal of Modern physics 2013年第6期4卷 859-863页

作者： S. Ramesh G. Upender K. C. James raju G. padmaja S. Mohan Reddy C. v. Reddy Department of physics Osmania University Hyderabad India School of physics University of Hyderabad Hyderabad India

Ceria based electrolyte materials are very useful in intermediate-temperature solid oxide fuel cell (IT-SOFC). The compositions Ce0.85Gd0.15 - xCaxO2 - δ (x = 0.0 - 0.075) were prepared through sol-gel method. Their structure was studied by X-ray diffraction. Dense ceramic Ce0.85Gd0.15 - xCaxO2 - δ samples were prepared by sintering the pellets at 1300°C. The lattice parameter was calculated by Rietveld refinement of XRD patterns. Four probe A.C. impedance spectroscopy was used to study the total ionic conductivity of doped and co-doped ceria ceramics in the temperature range 200°C - 700°C. The Ce0.85Gd0.15 -xCaxO2 -δ composition showed maximum ionic conductivity with less activation energy.

关键词： Ceramic Sol-gel process Activation Energy Electrical Conductivity Solid Electrolyte

權益基礎報酬會增進還是傷害審計委員會會計專家對盈餘品質的效果?

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權益基礎報酬會增進還是傷害審計委員會會計專家對盈餘品質的效果...

2014第六届海峡两岸会计学术研讨会

作者： Gopal v.krishnan 俞洪昭 Department of Accounting & Taxation Kogod School of Business American University 政治大學

雖然目前許多公司均大幅增加對其審計委員會的權益基礎報酬給付,學術界對於權益基礎報酬是否影響盈餘品質(尤其是在SOX法案通過後),並未提供實證的證據。本研究探討權益基礎報酬會增進還是會傷害審計委員會會計專家對盈餘品質的效果。利... 详细信息

雖然目前許多公司均大幅增加對其審計委員會的權益基礎報酬給付,學術界對於權益基礎報酬是否影響盈餘品質(尤其是在SOX法案通過後),並未提供實證的證據。本研究探討權益基礎報酬會增進還是會傷害審計委員會會計專家對盈餘品質的效果。利用2006010間美國的S&p1500公司為樣本,本研究發現會計專家與盈餘品質之間呈現正向關係;然而,會計專家與權益基礎報酬給付的交乘項卻與盈餘品質之間呈現負向關係。這個結果意味著:權益基礎報酬會傷害審計委員會會計專家對盈餘品質的效果。進一步分析發現,這個負向的關係對於缺乏外部監督以及較容易發生財務報表舞弊的公司更為明顯。本研究之實證結果,對於董事會、主管機關、投資人以及其他市場參與人具有重要的政策性意涵。

关键词：審計委員會報酬會計專家盈餘品質

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用于测试数字IC的探测系统

电子设计技术 EDN CHINA 2012年第9期19卷 62-64页

作者： raju Baddi 塔塔基础研究院

本例描述了一个简单但强大的手持探头，既可以用做逻辑探头，也可以作为一个脉冲发生器，且两者可以单独使用或同时使用。这一特点使得该探头可以用于测试DIp数字IC，如门、触发器和计数器，它使用一个带三端跳线的插座．将每个引脚连... 详细信息

本例描述了一个简单但强大的手持探头，既可以用做逻辑探头，也可以作为一个脉冲发生器，且两者可以单独使用或同时使用。这一特点使得该探头可以用于测试DIp数字IC，如门、触发器和计数器，它使用一个带三端跳线的插座．将每个引脚连接到逻辑高、逻辑低、5v或地上。三个按键开关、两只双色LED和两个探头尖装在一个塑料圆筒中，例如空的20g或更大的胶棒管。

关键词：数字IC 测试逻辑探头系统探测脉冲发生器同时使用按键开关

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头盔佩戴者用针织无边帽的设计与开发

国际纺织导报 2014年第11期42卷 24-27,26页

作者： A.N.S.krishnan A.Thirugnanasambantham v.Chandrasekaran 王伟 pGS理工大学

骑两轮车和进行某些体育活动时所佩戴的功能性头盔大都是为了满足个人需求而独立设计。佩戴者长时间佩戴头盔并进行激烈运动会产生大量的汗液,但由于头盔设计上的缺陷,汗液无法及时排出。而人们对于在头与头盔之间佩戴无边帽的意识还很... 详细信息

骑两轮车和进行某些体育活动时所佩戴的功能性头盔大都是为了满足个人需求而独立设计。佩戴者长时间佩戴头盔并进行激烈运动会产生大量的汗液,但由于头盔设计上的缺陷,汗液无法及时排出。而人们对于在头与头盔之间佩戴无边帽的意识还很落后,且对无边帽的材料和结构适用性缺乏研究。通过系统科学地研究,探索出了适用于无边帽的材料和织物结构,提高了佩戴舒适性。

关键词：无边帽针织舒适性

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糖尿病性神经病变神经兴奋性的变化

世界核心医学期刊文摘（神经病学分册） 2005年第9期1卷 34-35页

作者： krishnan A.v. Kiernan M.C. 朱光明 prince of Wales Medical Research Institute Barker Street Sydney NSW 2031 AustraliaDr.

The underlying cause of diabetic neuropathy remains unclear,although pathological studies have suggested an ischaemic basis related to microangiopathy, possibly mediated through effects on the energy-dependent Na+/K+pump. To investigat e the pathophysiology of diabetic neuropathy, axonal excitability techniques wer e undertaken in 20 diabetic patients with neuropathy severity graded through a c ombination of quantitative sensory testing (QST) using a vibratory stimulus, ass essment of symptom severity using the Total Neuropathy Symptom Score (T-NSS) an d measurement of glycosylated haemoglobin as a marker of disease control. To ass ess axonal excitability,compound muscle action potentials were recorded at rest from abductor pollicis brevis following stimulation of the median nerve, and sti mulus-response behaviour, threshold electrotonus,a current-threshold relationship and the recovery of excitability were recorded in each patient. All patients had established neuropathy,with abnormalities of T-NSS present in all patients and QST abnormalities present in 65%. Compared w ith controls,diabetic neuropathy patients had significant reduction in maximal C MAp amplitude (p panied by a‘fanning in’of threshold electroto nus. In addition, the strength-duration time constant was decreased in diabetic neuropathy patients and recovery cycles were altered with reductions in refract oriness,the duration of the relative refractory period, superexcitability and su bexcitability. It is proposed that while the changes in threshold electrotonus w ith supportive findings in the currentthreshold relationship are consistent with axonal depolarization,possibly mediated by a decrease in Na +/K+pump activity , the alterations in the recovery cycle of excitability could be explained on th e basis of a smaller action potential, reflecting a limitation on the nodal driv ing current imposed by a reduction in Na+conductances.

关键词：神经兴奋性糖尿病神经病变神经症状评分定量感觉测试拇短展肌神经轴突相对不应期微血管病严重度分级电紧张

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