| Titre : |
Characterization of predominant bacteria in cattlehides and their control by a bacteriocin based preservative |
| Type de document : |
texte imprimé |
| Année de publication : |
1995 |
| Article en page(s) : |
p. 308-320 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Antibactériens
Bactéries -- Identification
Caractérisation
Cuirs et peaux -- Conservation
Cuirs et peaux de bovins
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The objective of this study is to develop an ecologically acceptable and effective means of preserving cattle hides between the time of their removal from the carcass and tanning. The effectiveness of two bacteriocins (small antibacterial peptides) from lactic acid bacteria with and without SDS was studied. The initial bacterial population of the hides following removal is predominantly gram-positive cocci and rods that are sensitive to a mixture of the two bacteriocins, nisin and pediocin AcH. Following storage of the hides at 25°C for 2d, the bacterial profile changed, with the majority being gram-negative motile rods, especially Proteus species, that were not sensitive to the bacteriocins. Supplementation of the bacteriocin mixture with sodium dodecyl sulfate (SDS 0.25%) reduced the growth of the gram-negative rods. The importance of either treating a hide immediately after removal with a suitable preservative or keeping the hides for a short time below 10°C prior to applying a preservative or keeping the hides for a short time below 10°C prior to applying a preservative is discussed. If a shift in the bacterial population occurs with gram-negative motile rods predominating, bacteriocins will need to be supplemented with other components. As these gram-negative rods are extremely proteolytic, once present the proteolytic enzymes they produce may degrade the hide quality even if a suitable preservative is used later to prevent further growth. |
| Note de contenu : |
- MATERIALS AND METHODS : Isolation of bacteria from hides - Biochemical and growth characteristics - Preparation of nisin and pediocin AcH - Influence of incubation temperature on growth rate - Viability loss of the isolates by bacteriocins - Growth in bacteriocin - Influence of supplementing bacteriocin mixture with SDS on growth - Influence of a mixture of bacteriocin and SDS on growth of 12 isolates at 25°C
- RESULTS AND DISCUSSION : Bacterial isolates from the hides and their characteristics - Growth of the isolates at different temperatures - Bacteriocin sensitivity of the isolates - Effectiveness of a combination of bacteriocin and SDS on growth of the isolates |
| En ligne : |
https://drive.google.com/file/d/1mp02zQ3AgDEqUsmecat--y38gsVyXgw4/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17837 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXX, N° 10 (10/1995) . - p. 308-320
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Characterization of predominant bacteria in cattlehides and their control by a bacteriocin based preservative in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXX, N° 10 (10/1995)
