摘要:

AbstractThe first stage in the destruction of the anthocyanin pigments in cacao beans during the curing treatment is hydrolysis by a glycosidase. The relevance of this reaction to the quality of the processed bean is discussed.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080902

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

Abstract‘Protein‐nitrogen’ (α‐amino‐nitrogen released on acid hydrolysis), organic carbon and total nitrogen contents of four soil types which had been subjected to the same fertilizer treatments, cropping practices and weather conditions over 8 years are compared with values for similar unfertilized soils. In the case of a loam soil there were no significant differences in these values between fertilized and unfertilized soil, but with sandy loam, sand, and chalky sandy soils the three values were significantly lower in unfertilized than in fertilized soils. The differences in total nitrogen between fertilized and unfertilized soils were proportionally greater than were differences in protei

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080903

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractHusked, hand‐pounded, milled raw rice and parboiled milled rice obtained from the same strain of paddy (Halubbulu) were infested byCalandra (Sitophilus) oryzae(rice weevil) for a period of eight months and the changes brought about in the different samples due to infestation have been studied. The results show that husked rice was infested to a greater extent than the other samples and developed an unhealthy appearance within two months of infestation. Parboiled and raw, milled samples of rice were found to be least susceptible to infestation. Infestation of the rice grain increased the loss of starch in the gruel during cooking, the loss being maximum in the case of husked rice. An appreciable increase in the acidity of fat and a decrease in the thiamine content due to insect damage were observed. No significant difference was noted in the other constituents of the grain, such as total nitrogen and soluble nitrogen. Some correlation was observed between the weight/volume ratio of uncleaned grain and the proportion of dust, loss in total weight, loss in thiamine and insect populatio

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080904

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe detoxifying action of cystine, homocystine, methionine, betaine, choline, sodium formate and of a homocystine–betaine combination was tested using acutely and chronically poisoned rats. Choline and formate were ineffective, cystine, homocystine and betaine showed significant antitoxic properties and methionine and the homocystine–betaine mixture were very efficient detoxicants. It is concluded that thallium interferes with both sulphur and methyl metabol

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080905

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe deposits retained by artificial and leaf surfaces sprayed to beyond ‘run‐off’ have been investigated for Bordeaux, Burgundy, and cuprous oxide sprays, both with and without supplements. In no instance was the level of deposit found to be influenced by increased spraying beyond the ‘run‐off’ stage.It has been shown that at low concentrations representative wetting agents of anionic, cationic and non‐ionic type slightly lowered the amount of deposit at ‘run‐off’; at concentrations greater than those used in practice, serious reductions in deposit level were shown in some instances. The results emphasize the need, in spray formulation, for careful consideration of the type and concentration of wetting agent used. Supplements such as glycerol and gelatin, which increase the viscosity of the spray, produced no increase in deposit.In the absence of supplements, spray retention was found to increase with increasing spray concentration and with increasing wettability of the surface. These results suggest that Rich's theory of the adsorptive capacity of a leaf surface for Bordeaux deposits is not

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080906

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe two principal factors (micro‐structure of fibres and fibre substance) influencing the texture of dehydrated fish are examined in a number of different products. A highly porous micro‐structure seems to be necessary both for good texture and good reconstitution properties. The importance of cross‐links between the protein peptide chains in relation to texture is emphasized and evidence presented that hydrogen and disulphide cross‐links do occur in dehydrat

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080907

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractThe component glycerides of the neutral fat extracted from nutmeg seeds (Indian name, ‘Jaiphal’) were studied by segregation of the fat into three fractions by crystallization from acetone and ether at 10° and 25° respectively, followed by determinations of the component acids present in each of the three fractions.The component acids of the whole fat are dodecanoic (0.4%), tetradecanoic (71.8%), hexadecanoic (14.3%), octadecanoic (1.2%), tetradecenoic (0.8%), hexadecenoic (4.8%), octadecenoic (5.2%), and octadecadienoic (1.5%). The component glycerides are: (1) fully saturated 71.3%, (2) mono‐unsaturated‐disaturated 20.5% and (3) di‐unsaturated‐monos

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080908

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080909

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA method is presented for estimating the stability to light of the colour of cooked hams, enabling the complete fading curve to be obtained.Some typical results obtained in presence and absence of air are considered.For the routine examination of samples, it is suggested that the stability may be conveniently expressed as the percentage of pigment remaining after one hour's exposure at 100 foot‐candles under stated condition

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080910

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080901

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY