检索结果-南通市图书馆

structural,morphological,optical and antibacterial performances of rare earth(sm)-doped ZnO nanorods

Journal of Rare Earths 2024年第11期42卷 2119-2127页

作者： A.Ravi J.samuel s.sahaya Jude dhas s.Usharani Turibius simon D.senthil Kumar s.K.Jasmin Vijitha A.sivakumar Raju suresh Kumar C.s.Biju department of Physics University College of Engineering department of Physics and Research Centre Malankara Catholic College Manonmaniam sundaranar University saveetha school of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha University department of Chemistry S.I.V.E.T College department of Biotechnology Vivekanandha College of Arts and Science for Woman (Autonomous) department of Physics Vel Tech Rangarajan Dr.Sagunthala R & D Institute of Science and Technology department of Physics & Research Centre Muslim Arts College Key Laboratory of High-temperature and High-pressure study of the Earth's Interior Institute of GeochemistryChinese Academy of Sciences department of Chemistry College of ScienceKing Saud University department of Physics St. Alphonsa College of Arts and Science

The significant rise of ultra-violet（UV） radiation and pathogenic infectious bacteria poses a serious threat to global *** researchers' interests are attracted by novel materials with strong UVblocking ability,antibacterial activity and low toxicity to other *** this case,a simple wet chemical method with different annealing temperatures（400,500,and 600℃） was employed to create highly effective rare earth（sm）-doped ZnO ***（101） plane of wurtzite ZnO shifts towards a lower angle with increasing annealing temperature,according to the X-ray diffraction（XRD） study findings,which additionally establishes the consequence of lattice *** of doublet peaks of sm 3d(sm 3d5/2and sm 3d3/2) in the X-ray photoelectron spectroscopy（XPs） spectrum clearly validates the substitution of sm3+ions in the 500℃-annealed *** 500℃-annealed nanorods exhibit combined performances of the wide band gap,improved UV absorbance,and vivid green luminescent emission（563 nm）.Additio nally,the nanorods have favorable UV-blocking execution of 96% for UVA at 360 nm,92% for UVB at 320 nm,and 57% for UVC at 225 nm,which is greater than the majority of ZnO-related materials that have been reported up to this *** doping is also appropriate for improving bacterial inhibition against the two studied strains（Escherichia coli and staphylococcus aureus）,in addition to the intriguing features discussed ***,with maximum inhibition zone diameters of 20±0.72 and 18±0.57 mm,respectively,these nanorods exhibit high inhibitory action against *** and *** bacterial *** rare earth-doped material developed during the current experiment,which was annealed at 500℃,could potentially serve as an effective replacement for UV-blocking and antibacterial material,especially for biomedical applications.

关键词： Wet chemical method rare earth doping Metal oxide UV-shielding Bacterial inhibition

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Modelling and Characterization of Basalt/Vinyl Ester/siC Micro-and Nano-hybrid Biocomposites Properties Using Novel ANN–GA Approach

引用

Journal of Bionic Engineering 2024年第2期21卷 938-952页

作者： Yesudhasan Thooyavan Lakshmi Annamali Kumaraswamidhas Robinson dhas Edwin Raj Joseph selvi Binoj Bright Brailson Mansingh Antony sagai Francis Britto Alamry Ali department of Mechanical Engineering Indian Institute of Technology Dhanbad(ISM)DhanbadJharkhand826004India Gati shakti Vishwavidyalaya(GsV-A Central University Funded By GoI in the Ministry of Railways) LalbaugVadodaraGujarat390004India Institute of Mechanical Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(SIMATS)Saveetha UniversityChennaiTamilnadu602105India Metal Joining Research Centre Department of Mechanical EngineeringSri Ramakrishna Engineering CollegeCoimbatoreTamilnadu641022India department of Mechanical Engineering Rohini College of Engineering and TechnologyPalkulamTamil Nadu629401India department of Mechanical Engineering College of Engineering in Al-KharjPrince Sattam Bin Abdulaziz University11942Al-KharjSaudi Arabia

Basalt fiber reinforcement in polymer matrix composites is becoming more and more popular because of its environmental friendliness and mechanical qualities that are comparable to those of synthetic *** fiber strengthened vinyl ester matrix polymeric composite with filler addition of nano-and micro-sized silicon carbide(siC)element spanning from 2 weight percent to 10 weight percent was studied for its mechanical and wear *** application of Artificial Neural Network(ANN)to correlate the filler addition composition for optimum mechanical properties is required due to the non-linear mechanical and tribological features of *** stuffing blend and composition of the composite are optimized using the hybrid model and Genetic Algorithm(GA)to maximize the mechanical and wear-resistant *** predicted and tested ANN–GA optimal values obtained for the composite combination had a tensile,flexural,impact resilience,hardness and wear properties of 202.93 MPa,501.67 MPa,3.460 J/s,43 HV and 0.196 g,respectively,for its optimum combination of filler and *** can be noted that the nano-sized siC filler particle enhances most of the properties of the composite which diversifies its *** predicted mechanical and wear values of the developed ANN–GA model were in closer agreement with the experimental values which validate the model.

关键词： Hybrid polymer composite Prediction Process modelling Artificial neural networks Genetic algorithm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Parametric optimization of friction stir welding parameters of marine grade aluminium alloy using response surface methodology

引用

Transactions of Nonferrous Metals society of China 2017年第11期27卷 2334-2344页

作者： s.sHANAVAs J.EDWIN RAJA dhas department of Mechanical Engineering Noorul Islam UniversityTamil NaduIndia department of Automobile Engineering Noorul Islam UniversityTamil NaduIndia

Friction stir welding between AA5052-H32aluminium plates is performed by central composite design technique of response surface *** is found that the welding parameters such as tool pin profile,tool rotational speed,welding speed,and tool tilt angle play a major role in deciding the joint *** joints fabricated using tapered square pin profile tool with a tool rotational speed of600r/min,welding speed of65mm/min,and tool tilt angle of1.5°result in an unexpected weld efficiency of93.51%.Mathematical models are developed to map the correlation between the parameters and responses(ultimate tensile strength and elongation)and these models are optimized to maximize the ultimate tensile strength of the friction stir welded *** plots generated from the mathematical models are used to interpret the interaction effects of the welding parameters on the response *** of the developed models is validated using analysis of variance(ANOVA)*** from the confirmatory experiments plotted in scatter diagram show a good agreement with predicted *** grain structures in various zones of the weld are examined by observing the micro and macro structures of the weld.

关键词： aluminum alloy 5052 friction stir welding response surface method tensile strength microstructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of rGO support on Gd@ZnO for UV-visible-light driven photocatalytic organic pollutant degradation

引用

Journal of Rare Earths 2023年第10期41卷 1525-1531,I0002页

作者： Baskaran Palanivel Md shahadat Hossain Romulo R.Macadangdang Jr. s.sahaya Jude dhas Abdullah M.Al-Enizi Mohd Ubaidullah Woo Kyoung Kim sreedevi Gedi s.Ignatius Arockiam department of Physics Kings Engineering CollegeSriperumbudurKancheepuram602117Tamil NaduIndia department of Innovation systems Engineering Graduate School of EngineeringUtsunomiya UniversityYoto 7-1-2Utsunomiya 321-8585Japan College of Allied Health National UniversityManila1008Philippines department of Chemistry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia school of Chemical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea PG and Research department of Chemistry GTN Arts CollegeDindigul624005Tamil NaduIndia

In this manuscript,we report the hydrothermally prepared rGO/Gd@ZnO nanocomposite for the utilization of photocatalytic Rh B(rhodamine B)dye *** required characterization techniques were carried out to analyse the structural,morphological,chemical,environmental and optical behaviour of the prepared *** efficiency of the prepared nanoparticles was studied by Rh B dye degradation upon UV-Vis-light illumination which reveals that composite catalyst degrades the dye molecule about 91%after 40 min of *** comparing the higher degradation efficiency of the rGO/Gd@ZnO nanocomposite with that of ZnO and Gd doped ZnO,it reveals a greater reduction of charge carriers'recombination,higher visible-light utilization and higher adsorption *** trapping experiment and recycling test were conducted to study the influence of active radicals for the degradation reaction and to know the stability of the prepared nanocomposite,***,this rGO supported Gd doped ZnO nanocomposite can provide a new path way in preparing a highly efficient photocatalyst for organic pollutant degradation at large.

关键词： rGO Gd doped ZnO UV-Vis photocatalyst Dye degradation Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of the nutritional value of Artemia nauplii for European seabass(Dicentrarchus labrax L.)larvae

引用

Aquaculture and Fisheries 2024年第1期9卷 78-84页

作者： Alaa A.El-Dahhar Rashwan s.Rashwan samy Y.EL-Zaeem shaimaa A.shahin Mona M.Mourad Mohammed F.El Basuini Animal and Fish Production department Faculty of Agriculture-Saba BashaAlexandria UniversityAlexandria21526Egypt National Institute of Oceanography and Fisheries(NIOF) Cairo11562Egypt department of Animal Production Faculty of AgricultureTanta UniversityTanta31527Egypt Faculty of desert Agriculture King Salman International UniversitySouth Sinai46618Egypt

Adapted European seabass(Dicentrarchus labrax L.)larvae at 25 days post-hatching(dph)with a primary weight and length of 23 mg and 9.92 mm,start the weaning up to 46 dph using the weaning micro-diet(54%crude protein from fish meal,powder milk,and poultry egg)concurrently with Artemia enriched with fortification emulsions(0.6 g/L)of DHA selco®as a control group(dhas)or Fish oil+20%Vitamin C(FOVC),or Fish oil+20%Vitamin E(FOVE),or Fish oil+10%Vit.C+10%Vit.E(FOCE),or Fish oil only(FO).At 46 dph,groups of larvae fed enriched Artemia with dhas and FOVE exhibited the highest final body weight,weight gain,average daily gain,specific growth rate,feed intake,protein efficiency ratio,and survival%as well as the lowest feed conversion ***,larvae in FOVC displayed the lowest final body weight,total length,weight gain,average daily gain,specific growth rate,feed intake,protein efficiency ratio,and survival%as well as the highest feed conversion *** histological assessment exhibited no pathological alteration as well as an improvement in the structure with dhas,FOVE,FOVC,and FOCE co-additives compared to *** peroxidase enzyme(GPx)recorded the highest rates(Ps fed Artemia supplemented with dhas and FOVE followed by FOCE and *** the lowest record for GPx activity was noted in the FO *** conclusion,Using augmented Artemia nauplii with fish oil+vitamin E in single or in companion with vitamin C as cheap antioxidants support *** larval growth,survival,and antioxidant efficacy during the critical weaning period.

关键词： European seabass Gastrointestinal histology Antioxidants Vitamin C Vitamin E DHA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comprehensive Characterization of Natural Cissus quadrangularis stem Fiber Composites as an Alternate for Conventional FRP Composites

引用

Journal of Bionic Engineering 2018年第5期15卷 914-923页

作者： suyambulingam Indran Robinson dhas Edwin Raj Brainerd samuel sundar Daniel Joseph selvi Binoj department of Mechanical Engineering Rohini College of Engineering and Technology Anjugramam - 629401 Tamil Nadu India department of Mechanical Engineering St. Xavier's Catholic College of Engineering Nagercoil - 629003 Tamil Nadu India department of Metallurgical and Materials Engineering Indian Institute of Technology Roorkee - 247667 Uttarakhand India department of Mechanical Engineering Sree Vidyanikethan Engineering College (Autonomous) Tirupati - 517102 Andhra Pradesh India

Health and sustainability are the major concerns that drive researchers to find novel materials to replace artificial hazardous materials. In this investigation, the mechanical properties of Cissus quadrangularis stem Fiber （CQsF） reinforced with unsaturated polyester composite were optimized by varying the fiber length and content. To substantiate the findings, chemical property, thermal property, microstructure, and water absorption property were analyzed. Progressive enhancement of mechanical properties was observed with increasing the fiber content and fiber length up to 30 wt.% and 40 ram. However, beyond that limit, there was a decline in the strength due to improper bonding of fiber with matrix. Optimal values of mechanical property for CQsF composite were obtained at 30 wt.% fiber content and 40 mm fiber length, which are comparable with that of common artificial fiber-reinforced polymer composites.

关键词： CQsF mechanical properties thermogravimetric anlaysis microstructure water absorption

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bacteriocin from Bacillus subtilis as a novel drug against diabetic foot ulcer bacterial pathogens

引用

Asian Pacific Journal of Tropical Biomedicine 2013年第12期3卷 942-946页

作者： Baby Joseph Berlina dhas Vimalin Hena Justin Raj Interdisciplinary Research Centre Department of BiotechnologyMalankara Catholic College department of Microbiology Hindusthan College of Arts and Science

Objective:To isolate and identify Bacillus subtilis(***)from soil and to characterize and partially purify the *** evaluate the antimicrobial activity against four diabetic foot ulcer bacterial ***:Genotypic identification was done based on sergey's manual of systemic *** susceptibility test was done by Kirby-Bauer disc diffusion *** were identified by colony morphology and biochemical characterization and also compared with MTCC 121 *** identification was done by 16s rRNA *** activities of partially purified bacteriocin on all the DFU isolates were done by agar well diffusion *** strain was identified to produce bacteriocin by stab overlay *** was extracted by organic solvent extraction using chloroform,further purified by HPI.C and physical,and chemical characterization was ***:The four isolates showed high level of resistance to amoxyclav and sensitivity to *** purification revealed that the extracts are *** phylogenetic tree analysis results showed that the isolate was 99%related to *** *** results reveled activity to all the four isolates and high level of activity was seen in case of Klebsiella ***:Partially purified bacteriocin was found to have antimicrobial activity against the four diabetic foot ulcer bacterial pathogens,which can thus be applied as a better drug molecule on further *** strain *** are found to be safe for use and these antimicrobial peptides can be used as an antimicrobial in humans to treat DFU bacterial pathogens.

关键词： 16s rRNA Antimicrobial activity Micrococcus leuteus HPLC Physicochemical characterization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Picric Acid on the sHG Efficiency of L-Prolinium Tartrate Crystals

引用

Journal of Minerals and Materials Characterization and Engineering 2011年第10期10卷 913-921页

作者： s. Natarajan K. Moovendaran J. Kalyana sundar G. Bhagavannarayana s.A. Martin Britto dhas Material Characterization Division National Physical Laboratory New Delhi 110012 India school of Physics Madurai Kamaraj University Madurai-625 021 India

single crystals of the NLO material L-Prolinium tartrate (LPT) have been grown in the presence and absence of picric acid, by slow evaporation technique. Good quality crystals were harvested within 30 days. The grown crystals were characterized by single crystal X-ray diffraction. The quality of the crystals grown in the presence and absence of picric acid was examined by high resolution X-ray diffractometry (HRXRD). Fourier transform infrared spectroscopy (FTIR) and Fourier transform Raman spectroscopy were used to confirm the presence of the functional groups of L-Prolinium tartrate and the absence of picric acid in the crystals. The thermal stability and the trend of decomposition of the grown crystals were analyzed by thermo gravimetric analysis (TGA). The influence of picric acid on the second harmonic generation efficiency was studied by Kurtz and Perry method. It was observed that the sHG efficiency increased by about 2.3 times compared to that of normal LPT crystals. The results are discussed in detail.

关键词： organic compounds crystal growth X-ray diffraction thermo-gravimetricanalysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Charge syndrome—A Case Report

引用

International Journal of Otolaryngology and Head & Neck surgery 2015年第2期4卷 156-162页

作者： A. Ravindran A. Amirthagani Prince Peter dhas s. Nagarajan senthil Kumar satheesh Kumar &nbsp Venkatesh department of Otorhonolaryngology Thanjavur Madical College Thanjavur India

CHARGE syndrome is a rare, recently well recognized entity with non-random pattern of congenital anomalies. The syndrome associations consist of C-coloboma of the eyes, H-heart disease, A-atresia of the choanae, R-retarded growth and development, G-genital hypoplasia/genitourinary anomalies and E-ear anomalies and/or hearing loss. All anomalies are not seen in every case and a varied spectrum of associations is seen in most of the cases. The exact incidence is not known. However, the reported prevalence is approximately 1:10,000 births. We report one such case.

关键词： Charge syndrome Choanal Atresia Coloboma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

朱顶兰(AMARYLLIs VITTATA AIT)组织培养中的胚状体与再生植株

引用

新乡师范学院学报(自然科学版) 1985年第2期 62-67页

作者：李大卫高春建杨青姣新乡师范学院生物学系新乡市人民公园

以朱顶兰(Amaryllis vittata Ait.)的鳞片为外植体,诱导发生胚状体及再生植株。结果证明,不同层次和同层不同部位的鳞片外植体,诱导效果不同。胚状体发生的频率,内层高于外层;同层又以基部高于上部。用不同植物激素的不同浓度组合,诱导... 详细信息

以朱顶兰(Amaryllis vittata Ait.)的鳞片为外植体,诱导发生胚状体及再生植株。结果证明,不同层次和同层不同部位的鳞片外植体,诱导效果不同。胚状体发生的频率,内层高于外层;同层又以基部高于上部。用不同植物激素的不同浓度组合,诱导胚状体,结果表明,以Murashige-skoog配方为基本培养基(以下简称Ms培养基),附加2,4,—二氯苯氧乙酸(以下简称为2,4—D)和吲哚乙酸(以下简称为IAA)者,优于单独使用其中之一者;二者单独使用时,则IAA优于2,4—D。分化幼苗培养基仍以Ms培养基为基本培养基,再附加IAA,玉米素(Zeatin)、生物素(Biotin)为好。分化后的幼苗,转入生根培养基,很快生根,形成完整植株。移植于小花盆内,极易成活并生长良好。

关键词：胚状体发生外植体朱顶兰不同部位 AMARYLLIs VITTATA AIT 再生植株

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：