摘要:

SUMMARYThe finding that iron has a profound effect in increasing both the rate and extent of Pseudomonas spoilage of experimentally infected shell eggs was extended to other egg spoilage bacteria. All bacteria tested were so affected. These gram‐negative bacteria included five strains ofProteus, three ofParacolobactrum, two ofAlcaligenes, two ofAerobacter, two ofAchromobacter, and two of Salmonell

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00057.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYThe ability of Tylosin to prevent the growth of coagulase‐positive staphylococci was examined in four food substrates. Staphylococcal development was prevented during the organoleptically acceptable shelf life of ice cream mix by 20 ppm of the antibiotic. Staphylococci were controlled in processed cheddar cheese spread, ham, and domestic sausage by 2.5, 3.0, and 5 ppm Tylosin, respectively. The possible use of Tylosin as a preventive of staphylococcal food poisoning in foods is discusse

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00058.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYTylosin at levels up to 100 ppm did not inhibit the germination of spores of Bacillus cereus and Clostridium species PA 3679 in brain heart infusion broth. Death of B. cereus in the presenee of Tylosin was correlated ehronologically with the start of exponential growth in Tylosin‐free control cultures. With PA 3679, the stage most susceptible to Tylosin occurred after germination but prior to exponential growt

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00059.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYAnserine (β‐alanyl‐L‐1‐methylhistidine) is cleaved hydrolytically by a haddock muscle enzyme. The inclusion of chlortetracycline and oxytetracycline in ice preserving eviscerated haddock increases the free β‐alanine andL‐l‐methylhistidine recoverable from the muscle during chill storage. This results from their lower utilization by the microfloras selected by tetracyclines. Technological implications are di

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00060.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYThe protein, oil, ash, moisture, sodium, and potassium content of samples of butterfish, flounder, pollock, and hake was determined. In addition, length, weight, and fillet yield have been recorded. Fillet yield differed markedly both with species and with the size of the fish. Analysis showed a wide variation in the percentage of oil, not only in butterfish (considered an oily fish) but also in lean fish such as silver hake and flounder. Protein content proved to be consistently higher in pollock than in the other fish. Mineral and oil components showed a much higher percentage in offal than in corresponding fillets. Analysis of variance indicated that significant differences in results were related to the season in which the fish were caught.

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00061.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYThe radiation resistance of spores of 6 strains of Type EClostridium botulinumwas determined in a beef stew substrate. The results are evaluated in terms of the minimum dose showing no spoilage for a 2 billion total inoculum level (20 cans each with 100 million spores per can) and in terms of a calculated radiation D value. The mean radiation D value for 6 strains is 0.132 megarad (range 0.125–0.138). A comparison with results for 6 strains of Type A and 5 strains of Type B shows that Type E strains possess about 45–5570 of the resistance to ionizing radiations of Types A and B. It is concluded that any radiation dose for food sterilization based upon the maximum resistance of Type A or B strains would provide ample protection against Type E strains. The unswelled cans at the lowest radiation level showing no spoilage were free of toxin and recoverable Type E spo

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00062.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYSpores of three strains ofClostridium botulinumType E were inoculated into 202 × 202 cans of beef stew and irradiated to permit the survival of a small number (50–250) of spores per container. The cans containing survivors were incubated at 43 and 49°F to determine whether germination and outgrowth of surviving spores could take place. With all three strains at least some of the survivors were capable of developing to the point of producing swell spoilage and toxin at both temperatures. The significance. of these results in relation to extension of the refrigerated storage’ life of food by radiation “pasteurization” is

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00063.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYNona‐2, 6‐dienal, non‐2‐enal, hex‐2‐enal, and three saturated aliphatic aldehydes were isolated from cucumbers. Quantitative and qualitative aspects of the flavor of nona‐2,6‐dienal and non‐2

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00064.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYA highly significant correlation (r =−0.97) exists between the amount of enzymatically developed pyruvic acid present in the juice of comminuted onion and the olfactory threshold concentration of the juice. The correlation indicates that determination of pyruvic acid in freshly prepared onion juice constitutes a fairly reliable, simple, and convenient method of estimating at least one aspect of onion flavo

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00065.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYUsing the interaction of carrageenan (Seakem type 5) with cetylpyridinium chloride as the type example, investigation was made of optimum conditions for the precipitation of carrageenan and its fractions by quaternary ammonium detergents. Found to be very critical factors for quantitative precipitation were the temperature and pH of the reaction medium. Comparatively, the amount of detergent cation bound by a particular sulfated hydrocolloid is indicative of its degree of sulfation.

ISSN:0022-1147    

DOI:10.1111/j.1365-2621.1962.tb00066.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY