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Nano-engineered catalysts for high-performance oxygen reduction reaction

Chinese Chemical Letters 2024年第10期35卷 510-516页

作者： Kunsong Hu Yulong Zhang Jiayi Zhu Jinhua Mai Gang Liu manoj krishna sugumar Xinhua Liu Feng Zhan Rui Tan School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Energy Innovation Centre Warwick Manufacture GroupUniversity of WarwickCoventry CV47ALUnited Kingdom School of Transportation Science and Engineering Beihang UniversityBeijing 100191China IDTECH(Suzhou)Co. Ltd.Suzhou 215217China College of Mechatronical and Electrical Engineering Hebei Agricultural UniversityBaoding 071001China

The efficient energy conversion of fuel cells is greatly constrained by the slow oxygen reduction reac tion(ORR)kinetics,which necessitates the use of highly active metal catalysts such as platinum(Pt).The critical challenge limiting large-scale usage of Pt is the capital cost that can be addressed through a pro totypical approach by embedding metal nanoparticles(NPs),e.g.,Pt NPs,in the conductive framework However,previously reported embedding approaches are sophisticated and suffer from limited yields leading to higher chemical process costs and remaining distant from commercial ***,we re port a facile,cost-effective and time-efficient structural tuning approach to synthesizing ultrafine Pt NP impregnated within a conductive and highly porous carbon framework via a microwave-assisted polyo reduction *** NPs with a uniform size of~2.27 nm can be successfully integrated within the pore of the carbon framework,enabling homogeneous *** from these highly dispersed and ultrafine Pt NPs,the electrochemical surface area(ECSA)is improved to 142.98 m^(2)/gPt,2.25 times highe than that of the commercial counterpart(63.52 m^(2)/gPt).Furthermore,our structurally optimized catalys composite features a remarkably catalytic activity with a high half-wave potential(E_(1/2))of 0.895 V and an improved mass activity(MA)of 0.2289 A/mgPt,2.39-fold improvement compared to the commercia *** addition,orthogonal experiments were designed to identify the key process parameter for fabricating Pt/C catalysts,offering insights for scaled-up and industrial production.

关键词： Fuel cells Oxygenreductionreaction Structural engineering Microwave method Ultrafine nanoparticles

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Demographic characteristics of patients who underwent anterior cruciate ligament reconstruction at a tertiary care hospital in India

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World Journal of Clinical Cases 2023年第15期11卷 3464-3470页

作者： Sai krishna Mlv Asjad Mahmood Pulak Vatsya Siva Srivastava Garika Ravi Mittal manoj Nagar Department of Orthopaedics All India Institute of Medical SciencesNew Delhi 110029India Department of Orthopaedics All India Institute of Medical SciencesBhopal 462020India

BACKGROUND Anterior cruciate ligament(ACL)tears are common sports-related *** incidence is not the same either for all the sports or for the same sport across various *** information is maintained by many sports leagues in their ***,very few nationwide registries exist for such *** study is carried out to know the demographic characteristics of patients who underwent ACL reconstruction at our hospital in *** To know the demographic characteristics of patients who underwent ACL reconstruction at a tertiary care hospital in *** All the patients who underwent ACL reconstruction from January 2020 to December 2021 were retrospectively *** with multi-ligament injuries or a history of previous knee surgery were *** patients’history was obtained from the hospital records,they were interviewed telephonically,and online questionnaires were *** demographic data was analyzed and compared to the existing *** A total of 124 patients were operated on for ACL reconstruction during this *** mean age of the patients was 27.97 *** hundred and thirteen patients(91.1%)were male and 11(8.9%)were *** majority of the patients(47.6%)sustained this injury by road traffic accidents(RTA)followed by sportsrelated injuries(39.5%).The commonest presenting complaint was giving way of the knee in 118 patients(95.2%).The mean duration from the injury to the first hospital visit among the patients was 290.1 *** mean duration from the injury to surgery was 421.8 *** ACL patients’demography is different in developing nations as compared to the developed *** are the leading cause of ACL injuries and are followed by recreational sports as a *** is delayed access to healthcare leading to delayed diagnosis as well as even greater time to ***,in turn,leads to poorer prognosis and longer *** registries for developing nations are th

关键词： Anterior cruciate ligament Sports injury Demography Epidemiology Knee

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A Review and Analysis of Localization Techniques in Underwater Wireless Sensor Networks

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Computers, Materials & Continua 2023年第6期75卷 5697-5715页

作者： Seema Rani Anju Anupma Sangwan krishna Kumar Kashif Nisar Tariq Rahim Soomro Ag.Asri Ag.Ibrahim manoj Gupta Laxmi Chandand Sadiq Ali Khan Department of CSE Guru Jambheshwar University of Science&TechnologyHisar125001India Department of Hydro and Renewable Energy Indian Institute of Technology RoorkeeIndia College of Computer Science and Information Systems Institute of Business ManagementKorangi Creek RoadKarachi75190SindhPakistan Faculty of Computing and Informatics Universiti Malaysia SabahJalan UMSKota Kinabalu88400SabahMalaysia Department of Electronics and Communication Engineering JECRC UniversityJaipurRajasthanIndia Computer Science Department UBIT Karachi UniversityKarachi75270Pakistan

In recent years,there has been a rapid growth in Underwater Wireless Sensor Networks(UWSNs).The focus of research in this area is now on solving the problems associated with large-scale *** of the major issues in such a network is the localization of underwater *** is required for tracking objects and detecting the *** is also considered tagging of data where sensed contents are not found of any use without *** is useless for application until the position of sensed content is *** article’s major goal is to review and analyze underwater node localization to solve the localization issues in *** present paper describes various existing localization schemes and broadly categorizes these schemes as Centralized and Distributed localization schemes ***,a detailed subdivision of these localization schemes is ***,these localization schemes are compared from different *** detailed analysis of these schemes in terms of certain performance metrics has been discussed in this *** the end,the paper addresses several future directions for potential research in improving localization problems of UWSN.

关键词： Underwater wireless sensor networks localization schemes node localization ranging algorithms estimation based prediction based

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Effect of Flow Field Geometry on Hydrodynamics of Flow in Redox Flow Battery

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Energy Engineering 2022年第1期119卷 201-217页

作者： M.Narendra Kumar S.manoj Kumar G.C.Vijayakumar K.Kadirgama M.Samykano krishna Venkatesh H.B.Murlidhara Center for Incubation Innovation Research and Consultancy(CIIRC)Jyothy Institute of TechnologyBangalore560082KarnatakaIndia Department of Mechanical Engineering Jyothy Institute of TechnologyBangalore560082KarnatakaIndia Faculty of Mechanical and Automotive Engineering Technology University Malaysia PahangPahang26600Malaysia Centre for Automotive Engineering Universiti Malaysia PahangPahang26600Malaysia College of Engineering Universiti Malaysia PahangPahang26600Malaysia

This study computationally investigates the hydrodynamics of different serpentine flow field designs for redox flow batteries,which considers the Poiseuille flow in the flow channel and the Darcy flow porous *** Fluid Dynamics(CFD)results of the in-house developed code based on Finite Volume Method(FVM)for conventional serpentine flow field(CSFF)agreed well with those obtained via *** deviation for pressure drop(ΔP)was less than 5.1%for all the flow rates,thus proving the present CFD analysis’s validity on the modified variation of serpentine flow *** serpentine flow field-2(MSFF2)design provided least pressure drop across the channel and maximum velocity penetration across the porous substrate when compared to the other *** increases its wetting ability,which is very important in terms of mass transfer over potential for electrochemical reaction happening in the porous substrate to achieve effective electrochemical cell performance.

关键词： Pressure drop velocity distribution serpentine flow field porous substrate redox flow battery

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Childhood Glaucoma: An Overview

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Open Journal of Ophthalmology 2012年第3期2卷 71-77页

作者： Parul Singh Yogesh Kumar manoj Tyagi krishna Kuldeep Parmeshwari Das Sharma Department of Ophthalmology V.C.S.G.G.M.S. & R.I. Srinagar Garhwal Uttarakhand India

Several types of childhood glaucoma exist, and the terminology is based on the time of onset of disease and its potential cause. Though childhood glaucoma occurs less commonly than adults but can lead to permanent visual damage due to amblyopia, optic neuropathy or refractive error. A detailed evaluation should be done to establish diagnosis. Medical therapy has a limited role and surgery remains main modality for treatment. Childhood glaucoma is a treatable disease, if early diagnosis is established and therapeutic intervention done in time. In children with low vision efforts should be there to maintain residual vision and visual rehabilitation with low vision aids should be done.

关键词： Childhood Glaucoma Goniotomy Trabeculotomy

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Preventable iatrogenic cause of foot-drop in knee injuries with literature review

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Chinese Journal of Traumatology 2022年第4期25卷 224-231页

作者： Anant krishna Sumit Arora Rakesh Goyal Manish Kumar Nirup Naik manoj Kumar Department of Orthopaedics All India Institute of Medical SciencesAnsari NagarNew Delhi110029India Department of Orthopaedic Surgery Maulana Azad Medical College&Associated Lok Nayak HospitalNew Delhi110002India

Purpose Common peroneal nerve palsy is quite disabling and every effort should be made to prevent its injury during the *** We retrospectively reviewed the prospectively collected data of 7 cases of tibial plateau fractures in association with proximal fibula fracture from January 2019 to September 2019 who presented to emergency room of our *** In addition to fibular neck fracture,the first case had type 6 tibial plateau displaced fracture and the second case had displaced acetabular fracture with instability of knee with tibial tuberosity *** peroneal nerve palsy developed following application of distal tibial skeletal traction in both the *** 6 such cases remained neurologically intact as traction was not applied to *** Such iatrogenic complication could have been prevented if the injury pattern of"concomitant medial and lateral columns"of the proximal leg is kept in mind by the treating surgeon before applying skeletal traction.

关键词： Common peroneal neuropathies Tibial plateau fractures Proximal fibula fractures Traction palsy

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Gonioscopy: A Review

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Open Journal of Ophthalmology 2013年第4期3卷 118-121页

作者： Parul Singh manoj Tyagi Yogesh Kumar krishna Kuldeep Parmeshwari Das Sharma V. C. S. G. G. M. S. & R. I. Srinagar India.

Gonioscopy allows us to examine the angle of anterior chamber and forms part of complete ophthalmic examination and it is mandatory for the diagnosis and management of glaucoma. Gonioscopy permits the identification of eyes at risk for closure and detects angle abnormalities that could have diagnostic and therapeutic implications. Principle, types and techniques of gonioscopy, various types of gonioscopic lenses used, indications of performing gonioscopy, gonioscopic anatomy and grading are discussed in this article.

关键词： Gonioscopy Anterior Chamber Angle Goniolens

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Xeroderma pigmentosa with ocular association: Case report

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Case Reports in Clinical Medicine 2013年第8期2卷 466-469页

作者： Achyut N. Pandey krishna Kuldeep Ameeta Koul manoj Tyagi Parul Singh Parmeshwari Das Sharma Deepak Dimri Department of Dermatology VCSG Government Medical College and Research Institute Srinagar Garhwal India Department of Ophthalmology VCSG Government Medical College and Research Institute Srinagar Garhwal India Department of Ophthalmology VCSG Government Medical College and Research Institute Srinagar Garhwal India

Xeroderma pigmentosum is a rare, autosomal recessive disease caused by a defect in DNA repair. Patients with xeroderma pigmentosum often have cutaneous and ocular sun sensitivity, freckle-like skin pigmentation, multiple skin and eye cancers, and, in some patients, progressive neurodegeneration. Xeroderma pigmentosum predominantly affects the ultraviolet (UV) exposed ocular surface, resulting in eyelid atrophy and cancers, corneal dryness, exposure keratopathy, and conjunctival tumors. General features included parental consanguinity (40%), familiarity (60%), onset of symptoms in the first 2 years (50%), malignant skin neoplasms (60%), and carcinoma of the tongue (20%). Among the ocular features, 50% of patients presented with photophobia. Lid freckles or atrophic skin lesions were seen in all patients. Lower lid tumours were seen in 30%, chronic conjunctival congestion in 40%, corneal opacification in 40%, squamous cell carcinoma of limbus in 20%, bilateral pterygium in 40%, and visual impairment in 50%. We report the clinical history and ocular pathology of a boy who is having xeroderma pigmentosum with ocular manifestations. The ophthalmic manifestations of xeroderma pigmentosum are discussed and reviewed with respect to this report and other cases in the literature. These cases illustrate the role of DNA repair in protection of the eyes from UV damage and neuron degeneration of the retina.

关键词： Ciliary Body Hamartoma Ocular Pathology Optic Atrophy Xeroderma Pigmentosum Pigmentary Retinal Degeneration

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