摘要:

The essential amino acids arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, valine, tryptophane and tyrosine were determined in the following fishery products using microbiological assay technique: fish meals, stickwaters (fish solubles), condensed fish solubles, liver, commercial liver hydrolysate, frozen pink salmon viscera, chum salmon fingerlings and herring scales.

ISSN:0706-652X    

DOI:10.1139/f47-048

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

In the presence of bacteria capable of reducing it, trimethylamine oxide exerts a poising action on the oxidation-reduction potentials of media. This poising is at an Eh level considerably electropositive to the Eó of the redox indicators commonly used in the "reduction tests" used for determining the bacterial quality of foods.

ISSN:0706-652X    

DOI:10.1139/f47-049

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Using the Dyer picrate method for trimethylamine determination the Evelyn 400 mμ filter is more satisfactory than the 420 filter.

ISSN:0706-652X    

DOI:10.1139/f47-050

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

The bacterial load on the surface of gutted cod is removed during filleting. Therefore the contamination of the fillet, and presumably its storage life, is determined by the sanitary conditions of the filleting operation. The storage period of the round fish has little relationship to the keeping quality of the fillet.

ISSN:0706-652X    

DOI:10.1139/f47-051

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Methods for the extraction of protein from fish muscle have been studied. Using the Waring Blendor to obtain fine subdivision, up to 95 per cent of the fish muscle protein can be extracted with 5 per cent sodium chloride. Optimum pH for extraction was pH 7–9, and the optimum salt concentration 3 to 5 per cent. About 3 per cent stroma protein, collagen and elastin, was found in cod and haddock muscle. Myosin constituted about 75 to 80 per cent of the total protein. Globulin X, myogen, and myoalbumin made up about 20 per cent of the protein.

ISSN:0706-652X    

DOI:10.1139/f47-052

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

A simple colorimetric method for protein estimation based on the biuret reaction has been developed. Protein concentrations of 0.1 to 1.2 mg. of nitrogen may be determined rapidly with an error of less than 2 per cent. Only one reagent is required.

ISSN:0706-652X    

DOI:10.1139/f47-053

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

The myosin fraction of fish muscle is isolated from the other proteins and is used in a study of denaturation by freezing as determined by solubility changes. The effects of the physical state of the protein, the rate of freezing, and the hydrogen ion concentration have been determined. Ions and salts showed a significant effect when the freezing temperature was lower than the cryohydric points of the salts.

ISSN:0706-652X    

DOI:10.1139/f47-054

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Total phosphorus, inorganic phosphorus and phosphocreatine were determined in trichloracetic acid extracts of fish skeletal muscle, and the acid extracts were then fractionated for the determination of adenosine polyphosphates, fructose mono and diphosphates, glucose monophosphates, myoadenylic acid, pentose phosphate and coenzyme, while glycogen was determined in the extracted tissue. A comparison of the distribution of these compounds in fish and rat skeletal muscle was made.

ISSN:0706-652X    

DOI:10.1139/f47-055

出版商:NRC Research Press    

年代:1950

数据来源: NRC