ISSN:0890-5436    

DOI:10.1080/08905438909549702

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Milk contains a number of immunoprotective and antimicrobial agents, aimed at the protection of the newborn animal. It contains specific immunoglobulins as well as non‐specific bactericidal factors. It mimics the defence mechanisms present in the blood stream.

ISSN:0890-5436    

DOI:10.1080/08905438909549703

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Food grade fungi were screened for their capacity to degrade aflatoxin B1(AFB1) in order to develop a biological detoxification process for contaminated feeds. An agar technique based on defluorescence of AFB1was used for this purpose. Good correlations were observed between defluorescent capacity, AFB1elimination and reduction of mutagenicity. Although not identified in these food grade fungi as yet, enzymatic studies performed separately withAspergillus flavusindicated the possible involvement of monooxygenase enzyme systems in AFB1degradation.

ISSN:0890-5436    

DOI:10.1080/08905438909549704

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The single and combined effects of the starter organismsLactobacillus curvatusLc2,Micrococcus variansM101 andDebaryomyces hanseniiDH1 on the growth ofStaphylococcus aureusSaC1507 were investigated in dry sausages. The sausages were prepared by adding to 1 kg of meat either 300 mg potassium nitrate and 28 g sodium chloride or 28 g of a nitrite‐curing salt containing 0.4% sodium nitrite. In sausages prepared with nitrateS.aureusgrew to a maximum level of 4 × 107cfu/g in the absence of any starter. Each single starter organism clearly exerted an inhibitory effect on the growth ofS.aureus. A further decrease was observed with combination of two starters and the strongest inhibition occurred after combination of all three organisms. Similar effects of starters were noted in the presence of nitrite; however, the reduction of the maximum count ofS.aureuswas more pronounced in most cases. The kinetics of microbial growth could be attributed to changes in pH and nitrite concentration. The results show, that by application of suitable cultures, the risk of growth ofS.aureusin dry sausage can be markedly reduced.

ISSN:0890-5436    

DOI:10.1080/08905438909549705

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Use of enzymes to detach surface‐bound biopolymers and bacterial deposits was investigated. Model systems consisting of amylose gels andS.mutansbacterial deposits adsorbed on glass were treated with commercial preparations of amylase and mutanase, respectively. In non‐agitated systems, complete detachment could be obtained, but only after extended incubation periods and with fairly high levels of enzyme. Overlay with a chemically distinct material, gelatin, obstructed detachment. These results suggest a need for commercial enzyme preparations of higher specific activity in systems where the nature of the key bonds to be cleaved is known and, in multi‐strata systems, inclusion of enzymes specific for each chemically‐distinct component.

ISSN:0890-5436    

DOI:10.1080/08905438909549706

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A total of 37 strains ofPediococcuswere screened for antagonistic effect against the growth of eight strains ofListeria monocvtoaenes(CA, V7, Scott A, 19111, 19113, 19115, F5027, F5069). Using an agar plate diffusion method, 28% of the 296 pairings were positive with distinct, clear zones of inhibition evident. The positive reactions were primarily seen withPediococcus acidilacticistrains isolated from or associated with meat fermentations and from abdominal related sites in humans. Strains ofPediococcus pentosaceusandPediococcus damnosusalso showed an inhibitory effect againstListeria. Studies employing growth extracts ofP. acidilacticiPO2 versus growth ofL. monocvtoaenes19113 showed that the inhibitory substance was retained by a molecular sieve with a pore size of 12,000 daltons, that P02 growth extract in late stationary phase (48 hour culture) was most effective, and that apparent resistant sub‐populations of L.monocytoaenes19113 eventually arose after continued exposure to the growth extract.

ISSN:0890-5436    

DOI:10.1080/08905438909549707

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0890-5436    

DOI:10.1080/08905438909549708

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

In the production of beverages such as wine, fruit juice and beer, the removal of phenolics (coumaric acids, flavans, antho‐cyanins ) in order to prevent discoloration, haze and flavour changes is a regular practice based on the addition of proteins, adsorbants and PVPP (polyvinylpolypyrrolidone).

ISSN:0890-5436    

DOI:10.1080/08905438909549709

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0890-5436    

DOI:10.1080/08905438909549710

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0890-5436    

DOI:10.1080/08905438909549711

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor