Antimicrobianas

  • Antibacterial and antioxidant effect of crude garlic extract in meat.
El-Zeini-S; Atta-AH
Animal Health Research Institute, Dokki, and Faculty of Vet. Med., Cairo University Giza, Egypt.
Veterinary-Medical-Journal-Giza. 1997, 45: 1, 37-45.
The antibacterial and antioxidant effects of crude garlic extract (2.5, 5, 10 or 20%) on Escherichia coli and Staphylococcus aureus were examined in fresh lean beef muscle samples obtained from an abattoir in Cairo, Egypt. The garlic extract reduced the number of bacteria attached to muscle samples in a dose-dependent fashion. It also significantly decreased values of thiobarbituric acid, peroxide and kreis optical density in meat kept in the refrigerator for 1, 3 and 5 days, showing that the garlic extract had an antioxidative effect.
  • Investigations on the antibacterial effect of conifer needle oils on bacteria isolated from the feces of captive capercaillies (Tetrao urogallus L., 1758).
Schales-C; Gerlach-H; Kosters-J
Institut fur Geflugelkrankheiten der Ludwig-Maximilians-Universitat Munchen, Veterinarstr. 3, D-85764 Oberschleissheim, Germany.
Journal-of-Veterinary-Medicine.-Series-B. 1993, 40: 6, 381-390; 45 ref.
Needles of Pinus sylvestris contain few tannins, which could be a reason for the capercaillies’ preference for them. The needles of Abies alba contain high amounts of tannins and essential oils, which may be why capercaillies refuse to eat them. The antibacterial effect of commercially available essential oils on bacteria was investigated with a filter paper disc method and in a liquid medium. The essential oils possess a bacteriostatic or a bactericidal effect against some of the tested bacteria. It is suggested that feeding on natural forage plants may help prevent the colonization of the intestines by facultatively pathogenic bacteria.
  • Screening of some essential oils against ringworm fungi.
Yadav-P; Dubey-NK
Department of Botany, Banaras Hindu University, Varanasi 221 005, India.
Indian-Journal-of-Pharmaceutical-Sciences. 1994, 56: 6, 227-230; 8 ref.
The essential oils hydrodistilled from 12 plants were screened for their antifungal activity against Trichophyton mentagrophytes and Microsporum microsporum audounil [M. audouinii?] causing ring worm diseases in animals and humans. The essential oils of Cinnamomum tamala, Citrus maxima, Cymbopogon citratus, Eucalyptus citriodora, Eupatorium cannabinum, Nepeta hindostana and Ocimum canum [O. americanum] exhibited fungicidal or fungistatic toxicity. C. tamala and C. maxima essential oils showed an MIC value of 500 p.p.m. against both fungi and were more effective than the synthetic antifungal agents, clotrimazole, griseofulvin or nystatin.
  • Some pharmacological activities of essential oils of certain umbelliferous fruits.
Afifi-NA; Ramadan-A; El-Kashoury-EA; El-Banna-HA
Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
Veterinary-Medical-Journal-Giza. 1994, 42: 3, 85-92; 19 ref.
Essential oils were prepared by hydrodistillation from the fruits of 9 plants belonging to the Umbelliferae [Apiaceae]: Anethum graveolens (dill), Apium graveolens (celery), Carum carvi (caraway), Carum copticum (ajowan [Trachyspermum ammi]), Coriandrum sativum (coriander), Cuminum cyminum (cumin), Foeniculum vulgare (fennel), Petroselinum sativum (parsley) and Pimpinella anisum (anise). The percentage yield, specific gravity and refractive index of each oil were determined. Pharmacological studies were carried out in rats and mice, and LD50 values were determined in mice. Coriander essential oil evoked a marked analgesic activity in mice, while dill and anise oils showed significant antipyretic activities in rats. Coriander, celery, parsley and cumin oils induced significant antiinflammatory activities 2, 3 and 5 h after administration to rats. Parsley oil exhibited a powerful antibacterial activity against all the bacteria tested except Salmonella typhimurium, while cumin oil showed a marked antifungal activity against all selected strains of fungi (Penicillium notatum, Aspergillus niger, A. fumigatus and Microsporum canis).
  • Antiherpetic activity of some Argentine medicinal plants. 
Garcia,-GH; Campos,-R; Torres,-RA-de; Broussalis,-A; Ferraro,-G; Martino,-V; Coussio,-J; De-Torres,-RA 
Fitoterapia. 1990, 41: 6, 542-546; 22 ref. 
Thirty species used medicinally in Argentina and several plant extracts were screened for antiviral activity, using a Herpes simplex virus-VERO cells system. Ethanolic extracts of aerial parts of Achyrocline alata, A. flaccida, A. vautheriana, Eupatorium buniifolium and Flaveria bidentis (all members of the Compositae) showed significant activity. The species tested are listed, with their local names and the reported medicinal uses (and parts used). 
  • Structure and in vitro antiviral activity of sesquiterpene glycosides from Calendula arvensis. 
Tommasi,-N-de; Pizza,-C; Conti,-C; Orsi,-N; Stein,-ML; De-Tommasi,-N 
Journal-of-Natural-Products. 1990, 53: 4, 830-835; 6 ref.    

Extracts of aerial parts of C. arvensis were shown earlier to possess anti-inflammatory activity [see Phytotherapy Research (1987) 1, 28]. Two new alloaromadendrol glycosides are reported, together with 5 isolated earlier. All 7 showed inhibitory activity against vesicular stomatitis virus; one slightly reduced rhinovirus 1B multiplication.  

  • Lignans with Anti-HIV Activity from Schisandra propinqua var. sinensis

Xiao-Nian Li, Jian-Xin Pu, Xue Du, Liu-Meng Yang, Hui-Mei An, Chun Lei, Fei He, Xiao Luo, Yong-Tang Zheng, Yang Lu, Wei-Lie Xiao and Han-Dong Sun

J. Nat. Prod., May 4, 2009

Abstract

Fourteen new lignans, tiegusanins A-N (1-14), together with 13 known compounds were isolated from the aerial parts of Schisandra propinqua var. sinensis. The structures and absolute configurations of 1-13 were established using a combination of spectroscopic techniques. Compound 14 was obtained as a racemate. When evaluated for inhibitory activity against HIV-1, tiegusanin G (7) showed anti-HIV-1 activity with an EC50 value of 7.9 µM and a therapeutic index (TI) of more than 25.

  1. blo
    marzo, 2013 a las 6:46 am

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  2. Andoe
    abril, 2013 a las 3:54 pm

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    • herbielatino
      abril, 2013 a las 6:43 pm

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