检索结果-南通市图书馆

Evaluation of phenolic contents and antioxidant activities of brown seaweeds belonging to turbinaria spp.(Phaeophyta,Sargassaceae) collected from Gulf of Mannar

引用

Asian Pacific Journal of Tropical Biomedicine 2013年第1期3卷 8-16页

作者： Kajal Chakraborty Nammunayathuputhenkotta Krishnankartha Praveen Kodayan Kizekadath Vijayan Gonugontla Syda Rao Marine Biotechnology Division Central Marine Fisheries Research Institute Central Marine Fisheries Research Institute

Objective:To evaluate the antioxidant activities and total phenolic contents of brown seaweeds belonging to turbinaria spp.[turbinaria conoides(***)and turbinaria ornata(***)collected from Gulf of Mannar of southeastern coast of India in various in vitro ***:The antioxidant activity was evaluated using different in vitro systems,viz.,I,I-diphenyl-2-picrylhydrazyl(DPPH),2,2'-azino-bis-3 ethylbenzothiozoline-6-sulfonic acid diammonium salt(ABTS),H_20_2/H0 radical scavenging,Fe^(2+)ion chelating ability,and reducing ***-Ciocalteu method was used to determine the total phenolic content of the extracts,and the results were expressed as mg of gallic acid equivalents(GE)/g of the seaweed *** acid-reactive substances assay was employed to assess the ability of the seaweed extracts to inhibit lipid ***:Ethyl acetate(EtOAc)fraction of *** registered significantly higher phenolic content(105.97 mg GE/g)than that of ***(69.63 mg GE/g).Significantly higher antioxidant potential as determined by DPPH(64.14%)radical scavenging activity was registered in EtOAc fraction of ***.A higher ABTS(?)radical scavenging(IC_(50)3.16μg/mL),Fe^(2+)chelating(IC_(50)0.46 mg/mL),H_2O_2 scavenging(IC_(50)4.25 mg/mL),lipid peroxidation inhibitory(TBARS,IC_(50)0.21 mg/mL),and reducing abilities(IC_(50)52.67 mg/mL)(P<0.05)were realized in EtOAc fraction of *** than other ***:This study indicated the potential use of *** and *** as candidate species to be used as food supplements/functional foods to increase shelf-life of food items for human consumption,and nutraceuticals to deter deleterious free radical-induced life-threatening diseases.

关键词： Brown seaweeds turbinaria conoides turbinaria ornata Antioxidant activity Total phenolic contents

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

Antimicrobial potential of selected brown seaweeds from Vedalai coastal waters,Gulf of Mannar

引用

Asian Pacific Journal of Tropical Biomedicine 2011年第2期1卷 114-120页

作者： Manivannan K Karthikai devi G Anantharaman P Balasubramanian T Centre of Advanced Study in Marine Biology Faculty of Marine SciencesAnnamalai University

Objective:To evaluate the antimicrobial activity of turbinaria conoides(***).Padina gymnospora(***) and Sargassum tenerrimum against human bacterial and fungal ***:The antimicrobial activities of the extracts against various organisms were tested by using disc diffusion ***:The methanol extract showed the better result than the other ***,the strong antibacterial inhibition was noted in methanol extracts of *** against Bacillus subtilus(26.33±1.86) and the mild inhibition of ethanol extracts from *** against Klebsiella pneumoniae(2.33±0.51).Acetone extraction of P. gymnospora had strong antifungal inhibition against Cryptococcus neoformans(23.00±1.78), and acetone extract of *** had mild inhibition against Aspergillus niger(3.00±0.89). Conclusions:The seven different solvent extracts of seaweeds used in the present study have shown significant bacterial ***,a detailed study on the principle compound in the seaweeds which is responsible for antimicrobial activity is still needed and it can be achieved by using advanced separation techniques.

关键词： Seaweed turbinaria conoides Padina gymnospora Sargassum tenerrimum Antimicrobial activity Gulf of Mannar

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

Characterization and screening of in vitro antimalarial and larvicidal activities of selected seaweeds from southeast coast of India against Plasmodium falciparum andAnopheles stephensi

引用

Journal of Coastal Life Medicine 2017年第6期5卷 242-248页

作者： Rajamani Sowmiya Govindasamy Balasubramani Paramasivam Deepak Dilipkumar Aiswarya Sundaram Ravikumar SundaramPrasannakumar Pachiappan Perumal Department of Biotechnology School of BiosciencesPeriyar UniversityPeriyar Palkalai NagarSalemTamil Nadu636011India Department of Oceanography and Coastal Area Studies School of Marine SciencesAlagappa UniversityThondi CampusRamanathapuramTamil Nadu623409India

Objective:To investigate the antimalarial and larvicidal activities of seaweeds against Plasmodium falciparum strain andAnopheles stephensi mosquito larva. Methods: The three different seaweeds,Jania rubens,turbinaria ornata (T. ornata) and Ulva fasciata were collected from Southeast India. The seaweeds were extracted using hexane and ethyl acetate solvents and evaluated for their mosquito-larvicidal and antiplasmodial property. The bioactive compounds of the seaweed extract were studied by Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. Results:The hexane extract ofT. ornata (HTO) has shown significant inhibitory effects at the IC50 value 22.98 μg/mL, when compared to the positive control, chloroquine (12.32 μg/mL). The larvicidal activity of HTO on the fourth instar larvae of Anopheles stephensi was found to be effective with the LC50 and LC90 values (μg/mL) of 1.38 and 3.34. The Fourier transform infrared spectroscopy analysis ofHTO revealed the presence of alkenes, aromatics, amides and amines groups, whereas in gas chromatography-mass spectrometry, 11 different bioactive components were recorded. The bioactive component, hentriacontane in the HTO might be responsible for the recorded antiplasmodial and larvicidal activities. Conclusions:The finding of the present study reveals that the constituents of T. ornata have new sources of antimalarial and larvicidal agents in future.

关键词： Anopheles stephensi FT-IR GC-MS Plasmodium falciparum turbinaria ornata

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

Antibacterial Effects of Extracts of Two Types of Red Sea Algae

引用

Journal of Biosciences and Medicines 2014年第2期2卷 74-82页

作者： Awatif Al-Judaibi Biological Science Department Microbiology Section King Abdulaziz University Jeddah KSA

Introduction: Intestinal bacteria are exposed many external influences, including drugs, causing the emergence of strains resistant to the effects of antibiotics. Consequently, the discovery of new antibiotics that affect resistant strains is required. Marine algae offer a source of renewable natural compounds with antimicrobial effects. Therefore, the aim of this study was to detect some of these compounds and examine their impact on enteric bacteria. Methodology: Escherichia coli, Salmonella typhi, Shigella dysenteriae, Klebsiella pneumoniae, and Enterobacter aerogenes were tested with extracts of turbinaria triquetra and Halimeda opuntia extracted with methanol, ethanol, petroleum ether, or dimethyl formamide solvents. We measured bacterial growth inhibition, the minimal inhibitory concentrations (MICs), and potassium leakage, and analyzed the bacterial cells with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Results: The T. triquetra extract produced with methanol strongly affected the bacteria tested. When the results for T. triquetra and H. opuntia were compared with those of omacillin, the T. triquetra and H. opuntia extracts in most solvents were more effective than the antibiotic. Differences in the bacterial growth inhibition and MICs depended on the type of alga and the solvent used. At the end of the incubation period, potassium leakage had increased by 62.98% for E. coli, 61.24% for S. typhi, 61.32% for S. dysenteriae, 64.02% for K. pneumoniae, and 63.10% for E. aerogenes when treated T. triquetra. Conclusion: turbinaria triquetra extracted with methanol strongly affected the growth of the bacteria tested. Therefore, it is a potential source of natural antibacterial compounds.

关键词： turbinaria triquetra Halimeda opuntia Antibacterial Solvents Enteric Bacteria

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

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

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

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：