title: Antioxidant and antimicrobial properties of various solvent extracts from Impatiens balsamina L. stems.
abstract: The antioxidant and antimicrobial activities as well as the quantity of phenolic substances of Impatiens balsamina L. stem extracts obtained with various solvent were determined in this study. All of the extracts possessed moderate antioxidant potential in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging and reducing power assays. Antimicrobial activity was estimated using the cylinder-plate and agar dilution methods against four bacterial and six fungal strains. The extracts showed good antimicrobial activity especially antifungal activity against all of the tested microorganisms. The total phenolic and flavonoid contents ranged from 2.88 to 13.63 mg gallic acid equivalents/g dried extract and 0.98 to 7.87 mg quercetin equivalents/g dried extract, respectively. The results presented here indicate that the I. balsamina stem extracts have antioxidant and antimicrobial properties and are therefore a potential source of antioxidant and antimicrobial agents for the food and pharmaceutical industries.
  
  
  CONCLUSIONS
  Our work indicates that the I. balsamina stem may be a good candidate as natural antioxidant and antimicrobial agents. It can be applied in food industry for preservation.
authors.affiliation: College of Science, Jiangxi Agricultural Univ, Nanchang 330045, Jiangxi, PR China.
authors.forename: Bu-Li
authors.initials: BL
authors.lastname: Su
authors.forename: Rong
authors.initials: R
authors.lastname: Zeng
authors.forename: Jin-Yin
authors.initials: JY
authors.lastname: Chen
authors.forename: Chu-Ying
authors.initials: CY
authors.lastname: Chen
authors.forename: Juan-Hua
authors.initials: JH
authors.lastname: Guo
authors.forename: Chang-Gan
authors.initials: CG
authors.lastname: Huang
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000302:isolation & purification / Q000494:pharmacology*; D000935:Antifungal Agents / Q000302:isolation & purification / Q000494:pharmacology; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000494:pharmacology; D020834:Ethnopharmacology / Q000379:methods*; D005419:Flavonoids / Q000032:analysis; D005520:Food Preservatives / Q000302:isolation & purification / Q000494:pharmacology; D005517:Foodborne Diseases / Q000517:prevention & control; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000254:growth & development; D006094:Gram-Positive Bacteria / Q000187:drug effects / Q000254:growth & development; D029069:Impatiens / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D010084:Oxidation-Reduction / Q000187:drug effects; D010407:Penicillium / Q000187:drug effects / Q000254:growth & development; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D018547:Plant Stems / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D015003:Yeasts / Q000187:drug effects / Q000254:growth & development
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D000975:Antioxidants; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D005520:Food Preservatives; D010636:Phenols; D010936:Plant Extracts; D012997:Solvents