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Application of Pomegranate Rind Extract for Improvement of Functional Properties of Various Materials—A Critical Review

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Open Journal of Composite Materials 2024年第2期14卷 71-90页

作者： Habeebunissa Nooman Narayanan Gokarneshan Murugan Umamaheswari Muthumani Dhiliphan Kumar usha kumari ratna Jayagopal Lavanya Senthamarai Kannan Umamageshwari Sona Mohandas Anton Zahurudeen Shahanaz Venkatesan Sathya David Piriadarshani Chokkanathan Kayalvizhi Department of Knitwear Design National Institute of Fashion Technology Chennai India Department of Textile Chemistry SSM College of Engineering Komarapallayam India Department of Management Studies Dr. SNS Rajalakshmi College of Arts and Science Coimbatore India Department of Business Administration Kalasalingam Business School Kalasalingam Academy of Research and Education Srivilliputhur India Department of Textiles and Clothing Avinashi Lingam Institute for Home Science and Higher Education for Women Coimbatore India Department of Fashion Design SRM Institute of Science and Technology (Kattankalathur) Chennai India Department of Fashion Design Hindustan Institute of Technology and Science Chennai India Department of Fashion Design SRM Institute of Science and Technology (Ramapuram) Chennai India Department of Mathematics Hindustan Institute of Technology and Science Chennai India Department of Textile Technology Jaya Engineering College Tiruninravur India

Pomegranate rind is abundantly available as a waste material. Pomegranate Rind Extract (PRE) can be applied to cotton fabrics for its natural colours, as a mordanting agent and also for imparting certain functional properties such as fire retardancy and antimicrobial properties. This paper reviews the feasibility of Pomegranate Rind Extract to improve the functional properties of cellulosic fabrics. Studies show that varying concentrations and higher temperatures that were used to apply the extract on the fabric, resulted in enhanced functional properties. At a particular concentration, the treated fabric showed a 15 times lower burning rate in comparison with the control fabric. Also, antimicrobial efficacy has been observed against Gram-positive and Gram-negative bacteria. Due to the natural colouring material, it can be used as a natural dye on cotton material. The fire retardancy of pomegranate rind extract was tested on jute material under varying alkalinity. Research has indicated that pomegranate rind extract could be used to dye polyamide as well. The rubbing and wash fastness of the finished fabrics is good. The light fastness was fair, and its antibacterial efficiency against tested bacteria was good.

关键词： Natural Polymers Synthetic Polymers Pomegranate Rind Extract (PRE) Dyeing Functional Property

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Gravity-driven powder flow and the influence of external vibration on flow characteristics

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Particuology 2024年第5期88卷 201-209页

作者： Muhammad Shahid Ansari ratna Kumar Annabattula Sathyan Subbiah Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India

The controlled and homogeneous flow of dry granular powders through hoppers is essential for applications,namely,packaging of food grains,fertilizers and additive manufacturing processes such as directed energy deposition for better product *** of the major issues encountered in the granular flows through hoppers is flow stagnation due to the well-known arching ***-assisted granular flow through hoppers is one of the mechanisms used for better mass flow *** this work,the influence of external mechanical vibration on the powder flow is investigated experimentally and using discrete element ***,the mass flow rate through the hopper increases with an increase in vibration amplitude and then decreases,signifying the existence of an optimal amplitude of *** DEM simulations explained the underlying mechanisms for the existence of an optimal amplitude of vibration corresponding to the maximum mass flow rate.A range of vibration amplitudes from 0 mm to 3.5 mm is used to study the flow behaviour;the maximum flow of around 33 g/s to 35 g/s is observed for 0.75 mm to 1.25 mm vibration amplitude for the hopper-particle combination studied in this *** work also reports the influence of vibration frequency,hopper,and particle dimension on the flow *** research facilitates the effective use of mechanical vibration to enhance powder flow that can further be extended to non-spherical and multi-material particles.

关键词： Discrete element method Flow rate Granular flow Path tracking Vibration intensity

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Investigating the future study area on VR technology implementation in safety training: A systematic literature review

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Journal of Safety Science and Resilience 2024年第2期5卷 235-248页

作者： Adithya Sudiarno ratna Sari Dewi Retno Widyaningrum Ahmad Murtaja Dzaky Ma'arij Aldi Yustisia Supriatna Industrial and Systems Engineering Department Institut Teknologi Sepuluh NopemberSurabaya60111Indonesia Occupational Safety and Health Councilof East Java Province(Dewan K3 Provinsi Jawa Timur) Surabaya60234Indonesia

Safety training is the exercise normally conducted for all the current and future employees of a company to identify and recognize occupational hazards and diseases as well as determine the appropriate controlling ***,virtual reality(VR)is a technology developed to virtually simulate the surrounding envi-ronment to ensure immersive experience and interaction through artificial three-dimensional(3D)*** devices have been developed to be more compact,easy to use,and affordable to enable people to enjoy immersive virtual experiences and provide interactive and realistic *** has made technology one of the most popular forms of media for different kinds of training,such as safety-related ***,this study aimed to review the use of VR in safety training through the systematic literature review(SLR)*** process focused on developing 4 primary questions(PQs)classified into 11 systematic research questions(SRQs)for discussion points concerning current developments in VR technology *** were further combined with the preferred reporting items for systematic reviews and meta-analyses(PRISMA)flow diagrams in selecting the relevant *** questions were also used to investigate the scenarios,methods,objectives,and outcomes of previous *** results showed the need for further studies on the application of VR technology in safety training in other fields such as firefighting,chemical industry,maritime,***,several scenarios such as construction design,disaster response,rescue procedures,and others need to be *** study also provides information on the gaps for future study,including the exploration of a broader range of industries and VR scenarios.

关键词： Virtual reality Safety training VRfuture development Systematic literaturereview

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全球视野下的全纳教育:概念阐释、政策演进与多元实践

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清华大学教育研究 2024年第2期45卷 24-32页

作者：拉特纳·戈什荆晓丽谢芸佳麦吉尔大学综合教育系加拿大北京师范大学国际与比较教育研究院北京100875

本文深度解析了全纳教育这一概念,并以加拿大和中国为例,探讨了全纳教育在西方国家和非西方国家的政策与实践。虽然全纳教育的理念得到了国际社会的广泛认可,但是在实际执行过程中,由于历史文化、社会经济等方面不同,呈现出不同的表现... 详细信息

本文深度解析了全纳教育这一概念,并以加拿大和中国为例,探讨了全纳教育在西方国家和非西方国家的政策与实践。虽然全纳教育的理念得到了国际社会的广泛认可,但是在实际执行过程中,由于历史文化、社会经济等方面不同,呈现出不同的表现形式。推行全纳教育需要对现行教育范式进行深刻改革,以更好地满足所有学生,特别是被排斥和被边缘化的学生群体的个性化教育需求,而实现这一目标需要教育政策制定者、学校管理者、教师、家长等在内的所有利益相关者的共同努力。

关键词：全纳全纳教育全民教育特殊教育

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A review on developing high-performance ZE41 magnesium alloy by using bulk deformation and surface modification methods

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Journal of Magnesium and Alloys 2023年第3期11卷 776-800页

作者： Subrat Kumar Baral Manjusha M.Thawre B.ratna Sunil Ravikumar Dumpala Department of Mechanical Engineering Visvesvaraya National Institute of TechnologyNagpur 440010India Department of Metallurgical and Materials Engineering Visvesvaraya National Institute of TechnologyNagpur 440010India Department of Mechanical Engineering Bapatla Engineering CollegeBapatla 522102India

Magnesium(Mg)alloys are generally used in light-weight structural applications due to their higher specific ***,the usage of these Mg alloys is limited due to their poor formability at room temperature,which is attributed to lower count of slip systems associated with the hcp crystal *** address these limitations,several new magnesium alloys and also many processing strategies have been developed and reported in the ***41 Mg is an alloy with significant quantities of zinc(Zn)and rare earth(RE)elements and has emerged as a promising material for aerospace,automotive,electronics,biomedical and many other *** make this alloy more competitive and viable,it should possess better mechanical and corrosion ***,the current paper reviews the effect of bulk mechanical processing on grain refinement,microstructural modification,and corresponding changes in the mechanical behaviour of ZE41Mg ***,the effect of various surface modification techniques on altering the surface microstructure and surface properties such as wear and corrosion are also briefly summarized and *** review also discusses the challenges and the future perspectives in developing high-performing ZE41 Mg alloys.

关键词： ZE41 magnesium alloy Bulk deformation Surface modification Mechanical properties Wear Corrosion

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Broad Ligament Pregnancy:Facing the Battle Unarmed

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Maternal-Fetal Medicine 2023年第4期5卷 253-256页

作者： Meenakshi Singh Nihita Pandey ratna Biswas Department of Obstetrics and Gynaecology Lady Harding Medical CollegeDelhi 110001India

Broad ligament pregnancy is defined as gestation that grows in the space formed by anterior and posterior peritoneal folds of the broad *** report a case of 30 years old lady admitted to our hospital with the diagnosis of gravida 2,para 1,live birth 1,with 24 weeks of gestation with low lying placenta with *** was taken up for lower segment cesarian section at 28 weeks gestation in view of low lying placenta with *** broad ligament pregnancy was diagnosed peroperatively after identifying the anatomical relationship of the *** was excised and margins secured after extraction of the baby and *** had an uneventful postoperative *** ligament pregnancy may be missed in antenatal period but in cases of displaced cervix,early onset unexplained anhydramnios,and failed induction of labor,it may raise high ***/laparoscopic management is the mainstay of management of broad ligament pregnancy.

关键词： Pregnancy ectopic Broad ligament pregnancy Intraligamentary pregnancy Laparotomy

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Situs inversus totalis in an asymptomatic adolescent-importance of patient education:A case report

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World Journal of Clinical Pediatrics 2023年第5期12卷 359-364页

作者： Lauren C.Hayashi ratna Acharya Department of Pediatrics University of Florida College of MedicineGainesvilleFL 32608United States Division of General Pediatrics Department of PediatricsUniversity of FloridaGainesvilleFL 32608United States

BACKGROUND Situs inversus totalis(SIT)may be an incidental finding in asymptomatic *** may not understand the implications of this condition and the importance of relaying the diagnosis to their healthcare *** SUMMARY We report an asymptomatic seventeen-year-old adolescent with previouslydiagnosed SIT who presented for a routine well-child *** history taking,he denied any past medical conditions,including cardiovascular *** when physical exam revealed point of maximal impulse and heart sounds on the right side,did he convey that he had been diagnosed with SIT incidentally at age of 12 *** was not aware of associated conditions or the potential implications of his diagnosis,nor did he realize it is pertinent medical history to be relayed to healthcare *** X-ray confirmed dextrocardia and abdominal X-ray showed right-sided *** sonogram showed left-sided liver and right-sided *** showed normal valvular structure and function.A comprehensive discussion was provided to address the patient’s lack of understanding that SIT is a medical diagnosis with potential *** While SIT is rare and mostly asymptomatic,affected patients may not comprehend the importance of the diagnosis and its potential *** of the patient’s lack of awareness allows the healthcare provider to educate the patient and hopefully can prevent potential medical and surgical complications.

关键词： Situs inversus Dextrocardia Adolescent Education Case report

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Efficacy and safety of local candida immunotherapy in recalcitrant warts in pediatric kidney transplantation:A case report

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World Journal of Transplantation 2023年第4期13卷 201-207页

作者： ratna Acharya Rachel Bush Felicia Johns Kiran Upadhyay Department of Pediatrics University of FloridaGainesvilleFL 32610United States Department of Pediatric Nephrology University of FloridaGainesvilleFL 32610United States

BACKGROUND Warts are common in recipients of kidney transplantation(KT).Resistant warts which are not amenable to conventional therapies may lead to significant *** data exists on safety and efficacy of local immunotherapy among immunocompromised KT *** SUMMARY We report a seven-year-old child who presented with recalcitrant plantar periungual warts in the early KT *** consisted of tacrolimus,mycophenolate and *** to failure of conventional anti-wart therapies,he was treated with two sessions of intralesional(IL)candida immunotherapy along with liquid nitrogen cryotherapy leading to complete resolution of the ***,de novo BK viremia was seen about three weeks following the last candida *** required reduction of immunosuppression and other anti-BK viral *** function remained stable but there were donor specific antibodies *** also was elevated level of plasma donor derived cell-free DNA.A pneumocystis jirovecii pneumonia occurred ten months following completion of immunotherapy that was successfully treated with *** this ten-month follow-up period,there have been no recurrence of warts,and transplant kidney function has remained *** Stimulation of cell-mediated immunity against the human papilloma virus induced by the IL candida immunotherapy is thought to be a cause for wart *** this therapy,whether it is necessary to augment the immunosuppression to prevent rejection is unclear as that may come with a risk of infectious ***,prospective studies in pediatric KT recipients are needed to explore these important issues.

关键词： Warts Kidney transplantation Candida Immunotherapy Pediatric Case report

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Condition monitoring of a wind turbine generator using a standalone wind turbine emulator

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Frontiers in Energy 2016年第3期10卷 286-297页

作者： Himani ratna DAHIYA Department of Electrical Engineering National Institute of TechnologyKurukshetra 136119 India

The intend of this paper is to give a description of the realization of a low-cost wind turbine emulator （WTE） with open source technology from graze required for the condition monitoring to diagnose rotor and stator faults in a wind turbine generator （WTG）. The WTE comprises of a 2.5 kW DC motor coupled with a 1 kW squirrel-cage induction machine. This paper provides a detailed overview of the hardware and software used along with the WTE control strategies such as MPPT and pitch control. The emulator reproduces dynamic characteristics both under step variations and arbitrary variation in the wind speed of a typical wind turbine （WT） of a wind energy conversion system （WECS）. The usefulness of the setup has been benchmarked with previously verified WT test rigs made at the University of Manchester and Durham University in UK. Considering the fact that the rotor blades and electric subassemblies direct drive WTs are most susceptible to damage in practice, generator winding faults and rotor unbalance have been introduced and investigated using the terminal voltage and generated current. This wind turbine emulator （WTE） can be reconfigured or analyzed for condition monitoring without the need for real WTs.

关键词： condition monitoring (CM) wind turbine emulator (WTE) wind turbine generator (WTG) maximum power point tracking (MPPT) tip speed ratio (TSR) rotor faults stator faults

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Effective platform for the generation of aerosol droplets and application in evaluating the effectiveness of a MEMS-based nanoparticle trapping device

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Particuology 2009年第6期7卷 471-476页

作者： ratna Tantra Dipak Gohil Peter Cumpson National Physical Laboratory Hampton RoadTeddingtonMiddlesex TW11 0LWUnited Kingdom School of Mechanical and Systems Engineering Newcastle UniversityNewcastle-upon-Tyne NE1 7RUUnited Kingdom

The purpose of this study is two-fold： firstly, the development of a cheap, easy-to-construct and effective nanoparticle generator for testing nanoparticle sensors; secondly, the use of such a generator to test the effectiveness of a sensor device in trapping aerosolised nanoparticles. In this study, we have constructed an effective aerosol generator platform, based on aerosol-assisted chemical vapour deposition technology. Under well-controlled experimental conditions, this platform is capable of depositing aerosolised sodium chloride particles homogeneously on a substrate very effectively. Deposited aerosol droplets were subsequently dried and shown to form nanosized cubic crystals that are free from impurities. This platform was employed to test the effectiveness of a MEMS comb device in the electrostatic trapping of nanoparticles. Upon applying a DC bias （0.5 V） to the MEMS device, results showed an increase in nanoparticle deposition on the surface of the device, due to electrostatic precipitation. The presence of an electric field was shown to affect crystal formation upon drying of the aerosol droplets on the substrate; this caused a blotchy appearance on the SEM image, which was not observed in the absence of electric field.

关键词： Aerosol MEMS sensor Particle generator

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