检索结果-南通市图书馆

The catalytic activity of transition metal oxide nanoparticles on thermal decomposition of ammonium perchlorate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2019年第4期15卷 629-635页

作者： Jalpa A. Vara Pragnesh N. Dave Shalini Chaturvedi Department of Chemistry K S K V Kachchh University Mundra Road Bhuj 370 001 Gujarat India Department of Chemistry Sardar Patel University Vallabh Vidyangar 388 120 Gujarat India Samarpan Science and commerce college Gandhinagar Gujarat India

The catalytic proficiency of three MONs for AP thermal decomposition was studied in this work.A chemical co-precipitation method was used for synthesis of MONs(CuZnO,CoZnO,and NiZnO)and their characterization carried out by utilizing XRD,FTIR,and *** TGA/DSC technique was employed for the investigation of the catalytic proficiency of MONs on the *** DSC data were used for measuring activation energy of catalyzed AP by using Ozawa,Kissinger,and Starink *** MONs were much sensitive for AP decomposition,and the performance of AP decomposition was further *** all the MONs,the CuZnO exhibits higher catalytic action than others and decomposition temperature of AP is descending around 117℃ by *** reduction in the activation energy was noticed after the incorporation of MONs in AP.

关键词： Metal oxide nanoparticles(MONs) Ammonium perchlorate(AP) Catalytic activity Activation energy

Biosynthesis of gold nanoparticles using aqueous extract of Ricinus cummunis leaves to augment catalytic degradation of organic dyes and study of its antifungal and antibacterial activities

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第4期87卷 87-98页

作者： Mrinalini Parmar Mallika Sanyal Department of Chemistry Gujarat UniversityAhmedabadGujarat 380009India St.Xaviers college NavrangpuraAhmedabadGujarat 380009India

In this study,biosynthesis of gold nanoparticles(Au NPs)using aqueous extract of fresh leaves of Ricinus cummunis plant is reported without the use of any synthetic chemical in the reaction *** prepared NPs are mostly spherical in shape with some particles having triangular or hexagonal *** average size of the particles as calculated using TEM data is 18 *** biosynthesised Au NPs were studied for their application in remediation of Congo Red,Methylene Blue,Reactive Red 120 and Rhodamine B dyes present in industrial *** degradation of dyes was confirmed spectropho-tometrically using UV-Vis *** Red 120 and Congo red dyes were most effec-tively reduced with 88%*** Au NPs were further studied for their potential as an effective antifungal agent against fungal strains namely Candida albicans and Aspergillus fumigatus and antibac-terial properties against Bacillus subtilis(Gram+ve)and Pseudomonas aeruginosa(Gram-ve)bacterial *** MIC values being 7.8 and 15.6(μg/mL)for Bacillus subtilis and Pseudomonas aeruginosa respectively.

关键词： Gold nanoparticles Photocatalysts Dye degradation Antifungal studies Antibacterial studies

Waste fly ash-ZnO as a novel sunlight-responsive photocatalyst for dye discoloration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Water Science and Engineering 2023年第1期16卷 76-82页

作者： Leena V.Bora Sonal P.Thakkar Kevin S.Vadaliya Nisha V.Bora Nirma University AhmedabadGujarat 382481India Government Engineering college ModasaGujarat 383315India

Treating waste with a waste material using freely available solar energy is the most effective way towards sustainable *** this study,a novel photocatalyst,partly derived from waste material from the coal industry,was *** ash hybridized with ZnO(FAeZn)was synthesized as a potential photocatalyst for dye *** synthesized photocatalyst was characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,and ultravioletevisible/near infra-red *** photocatalytic activity was examined with the discoloration of methylene blue used as synthetic dye *** the experiments were performed in direct *** photocatalytic performance of FAeZn was found to be better than that of ZnO and the conventionally popular *** LangmuireHinshelwood model rate constant values of ZnO,TiO2,and FAeZn were found to be 0.016 min1,0.017 min1,and 0.020 min1,*** were two reasons for this:(1)FAeZn was able to utilize both ultraviolet and visible parts of the solar spectrum,and(2)its BrunauereEmmetteTeller surface area and porosity were significantly *** led to increased photon absorption and dye adsorption,thus exhibiting an energy-efficient ***,FAeZn,partly derived from waste,can serve as a suitable material for environmental remediation and practical solar energy applications.

关键词： Photocatalyst ZnO Fly ash Geopolymer Wastewater treatment Methylene blue

Betulin protects against isoproterenol-induced myocardial injury by inhibiting NF-κB signaling and attenuating cardiac inflammation and oxidative stress in rats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2024年第6期14卷 236-244页

作者： Hital Shah Tejal Gandhi gujarat Technological University AhmedabadGujarat 382424India Department of Pharmacology Anand Pharmacy CollegeAnandGujarat 388001India

Objective:To investigate the cardioprotective potential of betulin in isoproterenol(ISO)-induced myocardial injury in ***:Wistar rats were divided into five groups(n=10):normal,ISO,nebivolol 5 mg/kg,and betulin(20&40 mg/kg).Nebivolol and betulin were administered orally for 29 ***(85 mg/kg)was administered subcutaneously on day 27 and day 28 to induce myocardial *** day 29,blood was collected for determination of cardiac markers,and hemodynamic parameters were *** levels of oxidative stress markers and the gene expressions of apoptotic markers and inflammatory mediators were ***,2,3,5-triphenyltetrazolium chloride staining and histopathological analysis were also ***:Betulin reduced the size of myocardial infarction,decreased elevated levels of cardiac enzymes,and maintained hemodynamic *** also inhibited ISO-induced upregulation of Bax,caspase-3,NF-κB,and IL-6,enhanced endogenous antioxidant enzymes,and reduced lipid ***,pretreatment with betulin alleviated myocardial ischemic damage,as reflected by reduced myonecrosis,edema,and inflammatory ***:Betulin exhibits strong cardioprotective activity against ISO-induced myocardial injury by anti-inflammatory,anti-apoptotic,and antioxidant activities.

关键词： NF-κB Isoproterenol Betulin Myocardial injury Oxidative stress Inflammation Apoptosis

Smash product algebras over twisted dimodule algebras

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2008年第3期23卷 366-370页

作者： CHEN Xiao-yuan Zhejiang Vocational college of commerce Hangzhou 310053 China

Results of the research for smash product algebras over dimodule algebras are generalized to the more general twisted dimodule algebras.

关键词： Hopf algebra twisted dimodule algebra

A comprehensive review on automation in agriculture using artificial intelligence

在线全文

学校读者我要写书评

暂无评论

Artificial Intelligence in Agriculture 2019年第2期2卷 1-12页

作者： Kirtan Jha Aalap Doshi Poojan Patel Manan Shah Gandhinagar Institute of Technology GandhinagarGujaratIndia Lalbhai Dalpatbhai college of Engineering AhmedabadGujaratIndia Vishwakarma Government Engineering college ChandkhedaAhmedabadGujaratIndia School of Technology Pandit Deendayal Petroleum UniversityGandhinagarGujaratIndia

Agriculture automation is the main concern and emerging subject for every *** world population is increasing at a very fast rate and with increase in population the need for food increases *** methods used by farmers aren't sufficient enough to serve the increasing demand and so they have to hamper the soil by using harmful pesticides in an intensified *** affects the agricultural practice a lot and in the end the land remains barren with no *** paper talks about different automation practices like IOT,Wireless Communications,Machine learning and Artificial Intelligence,Deep *** are some areas which are causing the problems to agriculture field like crop diseases,lack of storage management,pesticide control,weed management,lack of irrigation and water management and all this problems can be solved by above mentioned different ***,there is an urgent need to decipher the issues like use of harmful pesticides,controlled irrigation,control on pollution and effects of environment in agricultural *** of farming practices has proved to increase the gain from the soil and also has strengthened the soil *** paper surveys the work of many researchers to get a brief overview about the current implementation of automation in *** paper also discusses a proposed system which can be implemented in botanical farm for flower and leaf identification and watering using IOT.

关键词： Automation artificial intelligence Irrigation Machine learning

Wear Resistance of TiN_x/CF_y Coatings Deposited by RF Magnetron Co-Sputtering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2015年第12期31卷 1207-1216页

作者： Lin Zhu Jinwu Wang Zhuang Liu college of Engineering Northeast Agricultural University School of Light Industry Harbin University of Commerce

TiN x/CF y composite coatings were prepared by RF magnetron co-sputtering using twin cylindrical tube targets with Ar and N 2 *** composition of the coatings deposited at various positions was analyzed by X-ray photoelectron spectroscopy（XPS） and Rutherford back-scattering spectrometry（RBS）.The results revealed that the composition of the deposited coatings has a wide range of TiN x and CFy contents at different deposition positions,which leads to different structures and *** hardness of the composite coatings increases from 32 to 1603 HV with increasing the TiN x *** static contact angle of water ranges from 20° to 102° and decreases upon the incorporation of more TiN x into the CF y *** presence of the CF y groups enhances the contact angle between the coating and the solutions dropped onto it,which could effectively protect the coating from corrosion and improve the wear resistance properties in high relative humidity（RH）.The brittleness of the coatings decreases due to the softness of the CF y component,which can bear most of the load and result in less probability of crack *** results demonstrate the existence of a Ti-（C N） chemical bond in the composite coatings,which improves the wear resistance of the *** is indicated that the wear resistance of the TiN x/CF y coatings is independent of the ***,these properties depend on the uniform structure and the existence of chemical bonding between the TiN x and CF y ***,a specific ratio between the soft CF y phase and the hard TiN x phase can produce coatings with good wear resistance.

关键词： TiNx/CFy composite coatings Magnetron co-sputtering Wear resistance

A High-order Internal Model Based Iterative Learning Control Scheme for Discrete Linear Time-varying Systems

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2015年第3期12卷 330-336页

作者： Wei Zhou Miao Yu De-Qing Huang college of Electrical Engineering Zhejiang University college of Engineering Jiangsu Institute of commerce Department of Aeronautics Imperial College London

In this paper, an iterative learning control algorithm is proposed for discrete linear time-varying systems to track iterationvarying desired trajectories. A high-order internal model(HOIM) is utilized to describe the variation of desired trajectories in the iteration domain. In the sequel, the HOIM is incorporated into the design of learning gains. The learning convergence in the iteration axis can be guaranteed with rigorous proof. The simulation results with permanent magnet linear motors(PMLM) demonstrate that the proposed HOIM based approach yields good performance and achieves perfect tracking.

关键词： Iterative learning control high-order internal model discrete linear time-varying systems iteration-varying desired tra-jectory

Studies on the Adsorption of Amino Methylene Phosphonic Acid Resin for Holmium(Ⅲ)

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2003年第6期21卷 613-617页

作者：吴香梅熊春华姚彩萍 Department of Chemistry Lishui Teachers College college of Food Science Biotechnology and Environmental Engineering Hangzhou University of Commerce

The adsorption behavior and mechanism of a novel chelate resin, amino methylene phosphonic acid resin (APAR) for Ho(Ⅲ) were investigated. The statically saturated adsorption capacity is 258 mg·g^(-1) resin at 298 K in HAc-NaAc medium. The Ho(Ⅲ) adsorbed on APAR can be repeatedly eluted by 3.0 mol·L^(-1) HCl and the elution percentage is as high as 95.8%. The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k_(298)=1.14×10^(-5) s^(-1). The adsorption behavior of APAR for Ho(Ⅲ) obeys the Freundlich isotherm. The thermodynamic adsorption parameter, enthalpy change ΔH of APAR for Ho(Ⅲ) is 11.4 kJ·mol^(-1). The apparent activation energy is E_a=15.8 kJ·mol^(-1). The molar coordination ratio of the functional group of APAR to Ho(Ⅲ) is about 2∶1. The adsorption mechanism of APAR for Ho(Ⅲ) was examined by using chemical method and IR spectrometry.

关键词： matallurgical technology amino methylene phosphonic acid resin Ho adsorption mechanism rare earths