scholarly journals Ethanol Extracts from Mistletoe (Viscum album L.) Act as Natural Antioxidants and Antimicrobial Agents in Uncooked Pork Patties during Refrigerated Storage

2015 ◽  
Vol 29 (1) ◽  
pp. 109-118 ◽  
Author(s):  
Suk-Nam Kang
Keyword(s):  
Antimicrobial Agents ◽  
Natural Antioxidants ◽  
Viscum Album ◽  
Refrigerated Storage ◽  
Ethanol Extracts ◽  
Pork Patties

Phytochemical and antioxidant properties of Algerian Medicago Sativa L. Water, Ethenol and Chloroform extract

2019 ◽  
Vol 9 (3) ◽  
pp. 80-86
Author(s):  
Hanane Megdad ◽  
Samuel Chiomokhare ◽  
Ahmed M’Hamedi ◽  
Paul L Chazot
Keyword(s):  
Antioxidant Activity ◽  
Medicago Sativa ◽  
Phenolic Content ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Natural Antioxidants ◽  
Chloroform Extract ◽  
Total Phenolic ◽  
Medicago Sativa L ◽  
Ethanol Extracts

Plant natural products have a long history of being a rich source of neuroactive drugs.The total phenolic and flavonoid content, and antioxidant activity of ethanol, chloroform and aqueous extracts of AlgerianMedicagoSativaL, leaves were measured to discover new potential sources of Algerian natural antioxidants and neuroactives. All extracts were non-neurotoxic up to 1 mg/ ml for 24 h exposure. The total phenolcontent of M.Sativa extracts ranged between 38 and 69 mg GAE per g extracts. All of the extracts displayed antioxidant capacityassessed by two methods, but at different levels depending on the concentration and the extraction solvent used. The overall antioxidant potency was in the order water > chloroform> ethanol extracts, and the phenolic content exhibited a positive correlation with the antioxidant activity of M. Sativa extracts.Despite a weaker antioxidant activity, the ethanol extract elicited a calcium spike and suppressed the KCl-induced depolarisation response in neurons, indicating effect on ligand-and/or voltage gated calcium channels. In contrast, the chloroform and water extractsdisplayed no apparent direct functional effects. In conclusion, the antioxidant and functional properties related to phenolic content of Algerian Medicago Sativa L. in water and ethanol extracts, respectively.

scholarly journals DPPH-Scavenging and Antimicrobial Activities of Asteraceae Medicinal Plants on Uropathogenic Bacteria

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Phan-Canh Trinh ◽  
Le-Thi-Thanh Thao ◽  
Hoang-Tran-Viet Ha ◽  
TuAnh Nguyen
Keyword(s):  
Antimicrobial Agents ◽  
Natural Antioxidants ◽  
Ethyl Acetate Fraction ◽  
Antimicrobial Activities ◽  
Chrysanthemum Morifolium ◽  
Bacterial Strains ◽  
Ageratum Conyzoides ◽  
Potent Effect ◽  
E Coli ◽  
Dpph Scavenging

Asteraceae species were widely applied in traditional medicines in Asian countries as sources of natural antioxidants and antimicrobial agents. This study aimed to evaluate DPPH-scavenging capacities and antimicrobial activities of nine Asteraceae species collected from Southern Vietnam. Antioxidant and antimicrobial activities were determined by standard protocols. Essential oils from Ageratum conyzoides, Helianthus annuus, and Artemisia vulgaris indicated significant inhibitory effects on Staphylococcus aureus and Candida spp. Crude extracts and fractions from Taraxacum officinale, Chrysanthemum morifolium, A. conyzoides, and Tagetes erecta showed inhibitory ability on at least one testing bacterial strains including S. aureus, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa. In a study on clinical isolates, ethyl acetate fraction from A. conyzoides flower displayed the most potent effect on uropathogenic E. coli and K. pneumoniae with MIC at 1.25–10 mg/ml and 5–12.5 mg/ml, respectively. DPPH-scavenging assay indicated that T. erecta extract had the lowest IC50 (17.280 μg/ml) and is 2.4 times higher than vitamin C (7.321 μg/ml). This study revealed that A. conyzoides has good potential against uropathogenic E. coli and K. pneumoniae, and therefore could be applied for prophylactic treatment of urinary infection.

scholarly journals Antimicrobial Activity and Polyphenol Profiles of Hydroalcoholic Extracts of Thymus rasitatus Klokov and Thymus eremita Klokov

2021 ◽  
Vol 9 (A) ◽  
pp. 313-317
Author(s):  
Svetlana Ivasenko ◽  
Ainur Zhumabekova ◽  
Agnieszka Ludwiczuk ◽  
Krystyna Skalicka–Wozniak ◽  
Alexandr Marchenko ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chromatographic Analysis ◽  
Antimicrobial Agents ◽  
Raw Materials ◽  
Wide Spectrum ◽  
Raw Material ◽  
Thymus Vulgaris ◽  
Material Base ◽  
Ultrasound Assisted Extraction ◽  
Ethanol Extracts

BACKGROUND: A possible reduction in stocks of medicinal plant raw materials of Thymus serpyllum L. and Thymus vulgaris L. leads to the need to expand the raw material base of the official medicinal plants with using of endemic species of the flora of Kazakhstan, in particular, Thymus rasitatus Klokov, and Thymus eremita Klokov. AIM: The aim of the study was to study the possibility of using 70% ethanol extracts of T. rasitatus and T. eremita as antimicrobial agents. MATERIALS AND METHODS: The aerial parts of T. rasitatus and T. eremita were extracted with 70% ethanol using ultrasound assisted extraction. The qualitative and quantitative analyses of the 70% ethanol extracts were determined using the liquid chromatography-detection-ESI-mass spectrometry-(MS)/MS technique. The study of the antimicrobial activity of these extracts was performed for eight strains of Gram-positive bacteria, six strains of Gram-negative bacteria, and four cultures of fungi. RESULTS: Chromatographic analysis of hydroalcoholic extracts of both investigated Thymus species showed very similar phenolic compounds composition. In both cases, the major components are luteolin-7-O-glucoside and rosmarinic acid. About 70% ethanol extracts of T. rasitatus and T. eremita have a broad spectrum of antimicrobial activity, exhibit the bactericidal or bacteriostatic activity against all tested bacteria and fungi at concentration range of 0.0195–20 mg/ml, but differ in their potency against tested strains of microorganisms. CONCLUSION: About 70% ethanol extracts of T. rasitatus and T. eremita, endemic plants in the flora of Kazakhstan, can be considered as potential drugs with a wide spectrum of antimicrobial activity. The results of chromatographic analysis could be used for drug standardization.

scholarly journals QUALITATIVE AND QUANTITATIVE ANALYSIS OF LEAVES AND STEM OF TINOSPORA CORDIFOLIA IN DIFFERENT SOLVENT EXTRACT

2018 ◽  
Vol 8 (5-s) ◽  
pp. 259-264
Author(s):  
Praveen Garg ◽  
Rajesh Garg
Keyword(s):  
Natural Antioxidants ◽  
The Body ◽  
Aluminium Chloride ◽  
Screening Tests ◽  
Tinospora Cordifolia ◽  
Phytochemical Screening ◽  
Traditional Medicines ◽  
Phytochemical Compounds ◽  
Ethanol Extracts ◽  
Medicinal Drugs

Tinospora cordifolia is known as Giloe and Guduchi, with significant importance in the traditional medicinal systems. It is dioeciously plant. It is mostly used in Ayurved system. It is also known as a ‘Rasayans’ of medicinal system, which develops immune system of the body and protect against infection. The aim of this study is carried out to analyse the phytochemical compounds in leaves and stem extracts of T. cordifolia by using phytochemical screening tests and estimate total flavonoid content (TFC) by using aluminium chloride method in the sample extracts. The leaf and stem extracts of T. cordifolia expressed the presence of several phytochemicals viz., flavonoids, amino acids, diterpines, protein, saponins and carbohydrates. The result of phytochemical screening tests revealed that diterpines and carbohydrates are positive in all extracts of T. cordifolia, but flavonoids and saponins only present in  methanol and ethanol extracts. TFC of T. cordifolia was higher in ethanolic leaves extracts than mathanolic leaves extracts. The studies justify that T. cordifolia use in traditional medicines. The investigation further proposed that the phytochemicals present in stems and leaves of T. cordifolia, which can be use as natural antioxidants in medicinal drugs. Keywords: Tinospora cordifolia, Phytochemicals, Flavonoids

Antimicrobial and Antioxidant Activities of Deer Blood Hydrolysate on Fresh Beef during Refrigerated Storage

2013 ◽  
Vol 634-638 ◽  
pp. 1417-1422
Author(s):  
Shuai Wang ◽  
Feng Bo Xu ◽  
Li Fu Zhu ◽  
Yan Ze Yu ◽  
Chun Zi Na
Keyword(s):  
Lipid Oxidation ◽  
Ph Value ◽  
Antioxidant Activities ◽  
Ground Beef ◽  
Thiobarbituric Acid ◽  
Natural Antioxidants ◽  
Inhibitory Effect ◽  
Plate Count ◽  
Refrigerated Storage ◽  
Color Deterioration

The aim of this work was to determine the inhibitory effect of deer blood hydrolysates addition on lipid oxidation, color deterioration and microbial contamination of ground beef during during 9 days of refrigerated storage. The pH value, total plate count, thiobarbituric acid-reactive substances value (TBARS), total volatile basic nitrogen (TVB-N) and color were also determined. The results showed that the treatments added hydrolysates had significant inhibitory effects on lipid oxidation and kept the red color of ground beef in 9 days, when compared with controls (P < 0.05). Furthermore, the inhibitory effect enhanced as the adding level of the hydrolysates increased (P < 0.05). These results suggest that deer blood hydrolysates are good source of natural antioxidants.

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