December 2010
In vitro antioxidant activity of acetylated derivatives of polysaccharide extracted from Ulva pertusa (Cholorophta)
Polysaccharides obtained from Ulva pertusa (Chlorophyta) contained a group of sulfated heteropolysaccharide referred to as ulvan in this paper. In this study, the acetylated ulvans with different substitution degree were prepared with acetic anhydride/ p-toluenesulfonyl chloride in N,N-dimethylacetamide, and their antioxidant activities were investigated including scavenging activity on...
December 2010
Fast identification of flavonoids in the roots of Sophora flavescens by on-flow LC-NMR
Sophora flavescens Ait (Leguminosae) is a Chinese herbal medicine. Sophorae radix, the dried roots of S. flavescens, has been used for various diseases including atherosclerosis and arrhythmias. For the direct identification of the compounds present in Sophorae radix, the hyphenated LC-NMR technique has been applied. WET solvent suppression and scout scan techniques were used to suppress solvent peaks in...
December 2010
Antimicrobial activity of some local mushrooms on pathogenic isolates
The antimicrobial properties of ethanol, hot and cold extracts of some mushroom species (Russula vesca, Auricularia auricular, Pleurotus squarrosulus, Volvariaella vulvae) on some Gram negative bacteria (Escherichia coli, Pseudomonas aeruginosa,Klebsiella pneumoniae, Proteus mirabilis, Salmonella typhi), Gram positive bacteria (Bacillus cereus, Staphylococcus aureus, Streptococcus...
December 2010
Molluscicidal activities of Ginkgo biloba leaf against the snail Oncomelania hupensis
In search for new plant molluscicides that could be used to control schistosomiasis, the ethanolic and aqueous extracts of five medicinal plants:Ginkgo biloba, Torreya grandis, Ailanthus altissima, Peucedanum praerutorumand Herba agrimoniae from China were obtained to evaluate their molluscicidal activity against the snail Oncomelania hupensis. In all of the plant extracts, only the...
December 2010
Comparative antimicrobial activities of Neem, Amla, Aloe, Assam Tea and Clove extracts against Vibrio cholerae, Staphylococcus aureus and Pseudomonas aeruginosa
This study was undertaken to identify medicinal plants that are effective against multiple human pathogens and to partially purify the active component through thin layer chromatography. Antibacterial activity of selected plant extracts were assayed by agar cup diffusion. Minimum inhibitory concentrations were determined against all the pathogens. Sensitivity of the pathogens was also checked with four standard...
December 2010
Antioxidant activity, nitric oxide scavenging activity and phenolic contents of Ocimum gratissimum leaf extract
Plant derived antioxidant could be useful as food additives to prevent food deterioration and also to impart human health and prevent oxidative stress associated diseases. In this study, the free radical scavenging potential of a methanol extract of the leaves of Ocimum gratissimum was assessed by measuring its capability for scavenging 2,2-diphenyl-1-picrylhydrazyl (DPPH.) radical, superoxide anion radical...
December 2010
Antimutagenic extract from Tinospora cordifolia and its chemical composition
Chemical constituents of Tinospora cordifolia n-hexane extract were characterized by Gas Chromatography-Mass Spectrometry (GC-MS) and column chromatography. 14 constituents were characterised by GC-MS analysis and column chromatography led to the isolation of β-sitosterol. The immunomodulatory activity of the extract was investigated by polymorphonuclear leucocytes function test and antimutagenic activity...
December 2010
Antispermatogenic effects of aqueous ethanolic extract of Hymenocardia acida stem bark in Wistar rats
Oral administration of aqueous ethanolic extract of Hymenocardia acida stem bark for eight weeks caused a significant reduction (P < 0.05) in the weights of testes, epididymides, ventral prostrate, seminal vesicles and vasa differentia compared to the control. The treatment related decreases in sperm motility, count, viability and serum testosterone returned to near normal levels on withdrawal of the...
December 2010
Optimization of ultrasonic-assisted extraction of chlorogenic acid from Folium eucommiae and evaluation of its antioxidant activity
Folium eucommiae is a traditional Chinese medicinal herb. Ultrasonic-assisted extraction (UAE) technique was developed for the fast extraction of chlorogenic acid from F. eucommiae leaves. Several influential parameters of the UAE procedure (solvents, extraction cycles, extraction temperature, solvent to material ratio, irradiation time and solvent concentration) were investigated for the optimization of...
December 2010
Evaluation of the hepatoprotective activity of standardized ethanolic extract of Curcuma xanthorrhiza Roxb.
Curcuma xanthorrhiza is widely used in Indonesia folk medicine to treat liver disorders. This study has evaluated the hepatoprotective activity of standardized ethanolic extract of C. xanthorrhiza. The extract was standardized using GC-MS. The hepatoprotective activity of this extract was studied using ethanol- induced liver toxicity in rats. This respective activity was assessed through monitoring liver...
December 2010
Enzymatic and non-enzymatic antioxidant responses of two Mentha pulegium provenances to salt stress
The aim of the present investigation was to evaluate the impact of moderate salinity in two Tunisian Mentha pulegium L. provenances differing in their salt sensitivity and to identify the antioxidant system responsible for the maintenance of plant vigor in the less sensitive provenance. Seedlings of the two provenances (Tekelsa and Soliman) were hydroponically grown at 0 and 35 mM NaCl over 15 and 45 days....
December 2010
Carbon Tetrachloride (CCl4) - induced Hepatotoxicity in Rats: Curative role of Solanum nigrum
Solanum nigrum is used in hepatic disorders in folk medicines. The present study was aimed to evaluate the efficacy of S. nigrum on the liver functions in CCl4 induced injuries. Enzymatic activities that are .AST, ALT and ALP, microscopic appearance of liver was used as parameter and hepatocurative studies were performed. In case of hepatocurative study that is post treatment of rats with...
December 2010
Effects of extensive consumption of hot red pepper fruit on liver of rabbit
In the present study, we examined the effects of hot red pepper on rabbit’s hepatic tissue. Rabbits were orally ingested 2 g/Kg hot red pepper every day for 10 days. Hot red pepper induced a significant increase in temperature of rabbits after oral ingestion of each dose. Hepatic tissue damage was recorded through examination of the stained paraffin embedded sections. Inflammatory cellular infiltration and...
December 2010
Antifatigue and sport performance enhancement effects of safflower extracts in mice
In this study, the antifatigue and sports performance enhancement effects of safflower extracts were evaluated in mice. Antifatigue effect of mice was judged by determining Blood Lactate Concentration (BLA) after a rolling stick and forced swimming exercise. Sports performance was evaluated by calculation of swimming endurance time and hypoxia tolerance time. BLA in test groups (weather low dose or high dose) was...
December 2010
Antioxidant and antibacterial properties of the leaves and stems of Premna microphylla
Premna microphylla is widely used in the Chinese folk medicine for the treatment of different infections diseases. In this study, ascorbic acid and β-carotene contents of the fresh P. microphylla leaves and stems were determined byspectrophotometric method. In addition, the antioxidant and antibacterial activities and phenolic contents of the methanol extracts of the dry leaves and stems were...
December 2010
Modulation of programmed cell death by honey bee in human prostate adenocarcinoma
The search for new anti-cancer drugs from natural products is one of the most prominent research areas of treatment of cancer. Honey finds a vital role in various applications using its anti-inflammatory, antioxidant, antibacterial and antitumor properties. We investigated the potential of honey to induce cytotoxic and antiproliferative effects in cultured human prostate cancer cell line (PC-3) in comparison to...
December 2010
Evaluation of antioxidant activities of five selected brown seaweeds from China
The antioxidant activities of Methanol/Chloroform (MC) extracts and fractions of five brown algae (Sargassum fusiforme, Sargassum kjellmanianum, Sargassum. pallidum, Sargassum thunbergii and Sargassum horneri) from China were evaluated through DPPH/hydroxyl radical-scavenging activity and reducing power. Total phenolic content was investigated using Folin–Ciocalteau reagent. The MC extract...
December 2010
Antioxidant, phenolic and protein contents of some medicinal plants
In this study, the antioxidant contents such as α-tocopherol, β-carotene, ferulic acid and gallic acid and, total phenolic and proteine contents of some medicinal plants were determined by High Performance Liquid Chromatography (HPLC) and UV-visible spectrophotometer, respectively. It was found that (i) the contents of antioxidant, phenolic and protein of plants were different according to plant types, (ii)...
December 2010
Seasonal changes in leaf and twig antioxidant systems in Damask rose (Rosa damascena Mill.)
The present study aimed to investigate the antioxidant activity of the various tissue types in Rosa damascena and determine the seasonal variations. The existence of statistically significant differences in the specific activities of enzymes among R. damascena accessions and tissue type was observed annually. The content of enhanced peroxidase and catalase in leaves has been shown to undergo seasonal...
December 2010
Antioxidant activity and cytotoxicity effect of flavonoids isolated from Athrixia phylicoides
Bioassay-guided fractionation of an ethanolic extract from aerial parts of Athrixia phylicoides using silica and sephadex column chromatography led to the isolation of three flavonoids. The compounds were identified as: 5-hydroxy-6,7,8,3’,4’,5’-hexamethoxyflavon-3-ol (1), 3-0-demethyldigicitrin (2), and Quecertin (3). Isolated compounds together with ethanol crude extract were tested for...
December 2010
Composition of the essential oil of Teucrium chamaedrys L. (Lamiaceae) from Turkey
The essential oil obtained by hydrodistillation from Teucrium chamaedrys L. (Lamiaceae) from Turkey was analyzed by (GC) and (GC/MS). Thirty six components in aerial parts of T. chamaedrys were identified representing (90.8%) of the oils. Main constituents of the oil were found as germacrene D (32.1%), b-ï€ caryophyllene (14.2%), dï€ -cadinene (13.1%), bicyclogermacrene (6.7%)...
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