检索结果-南通市图书馆

Bioactivity of compounds isolated from the leaves of the lantana camara Linn plant

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 Chinese Pharmaceutical Sciences 2019年第5期28卷 360-368页

作者： Suryati Elida Mardiah Mai Efdi Kartika MZ Yuni Mala Sari Department of Chemistry Faculty of Mathematics and Sciences Andalas University

Two compounds with different bioactivities were isolated from the leaves of the lantana camara Linn *** 1 was triterpenoid(Lantadene B)(22β-dimethylacroyloxy-3-oxoolean-12-en-28-oic-acid,C_(35)H_(52)O_5),which was isolated from n-hexane fraction and obtained as white solid(amorphous).Compound 2 was glycoside flavonoid(5-hydroxy-6,4′-dimethoxy flavon-7-O-glucopyranose,C_(23)H_(24)O_(11)),which was isolated from ethyl acetate and obtained as pale yellow solid(amorphous).Extraction was performed with maceration method using methanol ***,fractionation was carried out using n-hexane and ethyl acetate *** and purification of both fractions were conducted using chromatography *** structure of the isolated compounds was determined through spectral analyses of ultraviolet(UV),infrared(IR),and nuclear magnetic resonance(~1H NMR and ^(13)C NMR),distortionless enhancement by polarization transfer(DEPT),heteronuclear multiple bond connectivity(HMBC),heteronuclear single quantum correlation(HSQC),and H-H COSY(~1H-~1H homonuclear correlated spectroscopy).The cytotoxic activity of compound 1 was tested against MCF-7 breast cancer cells in vitro using MTT assay(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide),showing very strong cytotoxic activity in inhibiting the growth of MCF-7 breast cancer cells,and the IC_(50) value was 1.1336μ*** antioxidant activity of compound 2 was tested using DPPHassay(1,1-diphenyl-2-picrylhydrazyl),showing strong activity in inhibiting free radicals,and its IC_(50) value was 71.03 mg/L.

关键词： lantana camara Linn Lantadene B Glycosides flavonoid MCF-7 breast cell cancer Cytotoxic Antioxidant activity

Antioxidant activity of methanol extracts of different parts of lantana camara

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

Asian Pacific Journal of Tropical Biomedicine 2012年第12期2卷 960-965页

作者： Badakhshan Mahdi-Pour Subramanion L Jothy Lachimanan Yoga Latha Yeng Chen Sreenivasan Sasidharan Department of Biotechnology Faculty of Applied SciencesAIMST University Institute for Research in Molecular Medicine(INFORMM) Universiti Sains Malaysia11800Pulau PinangMalaysia Dental Research & Training Unit and Oral Cancer Research and Coordinating Centre(OCRCC)Faculty of DentistryUniversity of Malaya

Objective:To investigate the antioxidant activity of methanolic extracts of lantana camara(***)various parts and the determination of their total phenolics ***:The extract was screened for possible antioxidant activities by free radicaI scavenging activity(DPPH),xanthine oxidase inhibition activity and Griess—llosvay method。Results:The results showed that all the plant parts possessed antioxidant properties including radical scavenging,xanthine oxidase ildfibition and nitrites seavenging *** antioxidative activities were correlated with the total *** leaves extract of *** was more effective than that of other ***:This study suggests that *** extracts exhibit great potential for antioxidant activity and may be useful for their nutdtional and medicinal functions.

关键词： lantana camara Cytotoxicity Oral acute toxicity Vero cell Plant extract

In vivo toxicity study of lantana camara

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 2011年第3期1卷 230-232页

作者： Badakhshan Mahdi Pour Sreenivasan Sasidharan Department of Biotechnology Faculty of Applied SciencesAIMST University Institute for Research in Molecular Medicine(INFORMM) Universiti Sains Malaysia

Objective:To investigate the toxicity of methanol extract of various parts(Root,Stem,Leaf, Flower and Fruit) of lantana camara(***) in Artemia ***:The methanol extracts of *** were tested for in vivo brine shrimp lethality ***:All the tested extract exhibited very low toxicity on brine shrimp *** results showed that the root extract was the most toxic part of *** and may have potential as anticancer ***: Methanolic extract of *** is relatively safe on short-term exposure.

关键词： lantana camara Artemia salina Toxicity

Adsorption of Methylene Blue from Aqueous Solution Using Steam-Activated Carbon Produced from <i>lantana camara</i>Stem

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 Environmental Protection 2014年第13期5卷 1352-1363页

作者： Omotayo Sarafadeen Amuda Akeem Olusegun Olayiwola Abass Olanrewaju Alade Abolaji Grace Farombi Segun Akanmu Adebisi Analytical/Environmental Chemistry Unit Department of Pure and Applied Chemistry Ladoke Akintola University of Technology Ogbomoso Nigeria Department of Chemical Engineering Ladoke Akintola University of Technology Ogbomoso Nigeria Department of Science Laboraory Technology Osun State Polytechnic Iree Nigeria Department of Chemical Sciences Osun State University Osogbo Nigeria

This study investigated the adsorption of Methylene Blue (MB) present in wastewater onto the activated carbon produce from lantana camara stem. The agricultural material (lantana camara stem) was carbonized at 300°C for 2 h, ground and steam-activated. The Steam-Activated lantana camara (SALC) stem carbon was characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) Spectrophotometry before and after adsorption. Batch model experiments were conducted at 20°C to study the effects of pH, agitation time, adsorbent dosage and initial concentration of methylene blue. The equilibrium adsorption isotherms and kinetics were investigated. The FTIR bands at 3500, 2500, 2196 and 1682 cm-1 were shifted to 3646.3, 3030, 2822, 1709.05 cm-1 after MB adsorption. Similarly, the Scanning Electron Microscopy (SEM) analysis showed that the average pore size on the activated carbon was 20 μm. The Methylene Blue (MB) uptake increased with the increase in pH. Similarly, the dye adsorption increased as contact time increased, and reached equilibrium at 60 minutes. The removal of the dye increased when the dosage was increased from 0.5 - 2.0 g·L-1, at different dye concentrations (50 - 200 mg·L-1). The percentage removal decreased with increasing initial dye concentration for SALC. The adsorption isotherm data fitted well to the Freundlich isotherm (R2 = 0.989) while the experimental data fitted very well to the pseudo-second-order kinetic model (R2 = 0.99). This study suggests that adsorbent prepared from lantana camara stem can be used effectively for the adsorption of methylene blue in wastewater.

关键词： Adsorption lantana camara Methylene Blue Steam Activation

lantana camara berry for the synthesis of silver nanoparticles

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 2015年第3期5卷 192-195页

作者： Brajesh Kumar Kumari Smita Luis Cumbal Alexis Debut Centro de Nanociencia y Nanotecnologia Universidad de las Fuerzas Armadas-ESPE.Av.Gral.Ruminahui s/n

Objective:To synthesize the silver nunoparticles(AgNPs) by reduction of silver ions into nano silver,using ripened berry extract of lantana camara and evaluate its antioxidant activity against 1.1-diphenyl-2- ***:The prepared AgNPs were characterized by visual,UV-visible *** light scattering and transmission electron microscopy with selected area electron ***:Transmission electron microscopy and dynamic light scattering analysis confirmed the AgNPs are spherical and 75.2 nm average *** area electron diffraction analysis supports that the obtained nanoparticles were in crystalline *** addition,the antioxidant efficacy of prepared AgNPs was found to be higher than berry extract against ***:From the results obtained it is suggested that surface modified AgNPs at lower concentration,showed higher antioxidant activity than berry extract against 1,1-diphenyl-2-picrylhydrazyl and could be used effectively in future ethno pharmacological concerns.

关键词： Green synthesis lantana camara Silver nanoparticles Transmission electron microscopy DPPH·

Effect of invasive weed biochar amendment on soil enzymatic activity and respiration of coal mine spoil:a laboratory experiment study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biochar 2021年第4期3卷 519-533页

作者： Dipita Ghosh Subodh Kumar Maiti Ecological Restoration Laboratory Department of Environmental Science and EngineeringIndian Institute of Technology(Indian School of Mines)DhanbadJharkhand 826004India

Mining and excavation activities cause massive degradation of land,leading to complete loss of soil resources,vegetation,and *** spoils support invasive weeds(predominantly lantana)which can strive in these harsh conditions,causing allelopathy during plantation stage of *** is hypothesised that biochar produced from invasive weeds will enhance enzymatic activity,CO_(2)flux and overall fertility of coal mine spoil.A 6-month incubation study was conducted on the effect of biochar amendment(2 and 3%,w/w)on mine spoil enzymatic activities(dehydrogenase,invertase,amylase and cellulase),respiration and coal mine spoil *** study showed that biochar significantly improved dehydrogenase(83%)and cellulase activity(78%)at 3%*** mean of enzymatic activities increased from 1.87 in control to 4.51 at 2%and 3.25 at 3%biochar *** spoil physio-chemical properties such as soil organic carbon(65%),cation exchange capacity(54%),bulk density(25%)and water holding capacity(19%),were improved significantly com-pared to the unamended mine *** amendment reduced mine spoil CO_(2)flux at 2%(2.85μmol CO_(2)m^(−2)s^(−1))and 3%(2.60μmol CO_(2)m^(−2)s^(−1))compared to control(4.92μmol CO_(2)m^(−2)s^(−1)).The cost of biochar production and application(2%,w/w)in pit plantation during reclamation is estimated to be 844 USD t ha−1(plantation density:1600 trees ha−1).On the basis of present study,biochar preparation from invasive weeds can be used for sustainable reclamation of coal mine spoil.

关键词： lantana Geometric mean of enzymatic activity Economics Reclamation Pit plantation Coal mining