ISSN:0022-5142    

DOI:10.1002/jsfa.2740060301

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe amino‐acid requirements of 34 strains of lactic acid bacteria have been investigated. All the organisms required glutamic acid and leucine, but none required histidine, hydroxyproline, methionine, norleucine or norvaline. The maximum number of amino‐acids essential to any organism was ten, and the minimum was two. In some cases the omission, as a group, of individually non‐essential amino‐acids resulted in failure of

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060302

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe relation of phytate concentration to colour produced by standard quantities of thiocyanate and ferric iron in a solution is inverse and almost linear. This is the basis of the method proposed for the determination of phytate phosphorus. It has been applied to the determination of quantities between 75 and 150ug. in extracts from dried peas with an accuracy of ± 5%. Chloride, sulphate, citrate, tartrate and malate do not interfere in concentrations of the same order as that of the phytate. Interference by o‐I mg. of orthophosphate phosphorus is negligible; 0.4 mg. causes a positive error of less than 5%. It is suggested that there may be less interference in aqueous alcoh

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060303

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe lipids extracted from the mixed ‘free’ rumen micro‐flora of two hay‐fed sheep consisted of 39.2% of phospholipids, 38.2% of neutral fat, 12.4% of lower fatty acids (probably rumen fermentation products), I0.I% of unsaponifiable matter and 0.I% of steam‐volatile, neutral solid. The ‘true’ lipids amounted to 9% of the dry weight of the bacteria. The neutral fat was noteworthy for the relatively high mean molecular weight (312‐0) of its component acids. No linoleic or linolenic acid was detected in the neutral fat or phospholipids. The significance of this with respect to the host animal is discussed. The N:P ratio of the phospholipids indicated the presence of mono‐ and di‐aminophosphatides. The unsaponifiable matter contained carotenoid pigments (probably xanthophylls) and 16.I% of a steroid‐like substance, possibly C27H48O2, m.p. 130–132°, precipitable by digitonin, but not identical with the hydr

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060304

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractSamples representing the range of whale‐meat meals most often used in this country were examined in the laboratory to assess the variation of their composition. Besides the normal analytical figures required by the Fertiliser&Feeding Stuffs Regulations, the albuminoid protein, as given by copper precipitation, rate of digestion of protein with pepsin, and some of the members of the vitamin‐B group were also determined.Although no official method of grading exists, the whaling companies and merchants designate whale‐meat meals with protein content from 80 to 85% as Grade A, those containing from 40 to 65% of protein as Grade B, and meals derived mostly from bone as Grade C.The albuminoid nitrogen was as high as 97.2% of the total crude nitrogen in Grade‐A meals, as was the rate of digestion with pepsin. Where high ash contents occurred, as in Grade‐B and Grade‐C meals, however, both these figures were substantially lower.The results obtained for vitamins of the vitamin‐B group indicated that a wider variation in potency existed than had previously been suspected; one case of Grade‐A whale‐meat meal had a nicotinic acid content as high as 171 μ./g., but a sample of Grade C contained only 15 μ./g.Whale‐meat meals are accepted as a valuable source of nutrients to livestock, but grading and quality are important factors to be consider

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060305

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractAcker, Diemair&Jäger have reported the presence in spray‐dried whole egg and egg yolk of an enzyme capable of rapidly decomposing lecithin with the liberation of choline but not of fatty acids, and have pointed out the similarity of this enzyme to the phospholipase DIn this paper the enzyme that hydrolyses lecithin to phosphorylcholine and a diglyceride is referred to as phospholipase C, and that which produces choline and a phosphatidic acid as phospholipase D. Some authors, e.g. Hanahan&Vercamer,6reverse these definitions.recently discovered in carrots and other vegetables.We have been unable to confirm the existence of any considerable lecithinase activity in fresh egg yolk or in spray‐dried whole egg of good quality and suggest that the observed results may have been due to the action of microbial enzymes, possibly phospholipase C, present in the samples examined by the German wor

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060306

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractBy boiling a I : 2 suspension of soil in water under reflux for 15 minutes, a quantity of boron was extracted which gave a good index of the amount available to plants. If this ‘available’ boron fell below 0.7‐1.0 p.p.m. of air‐dried soil, raan (brown heart) was liable to occur in swedes grown in the area.Dressings to the soil of up to 30 lb. of borax per acre increased the available boron by substantial amounts. The boron content of the swedes cropped was also raised considerably and the incidence of raan lowered, and no toxic effects of borax treatment were noted. There was no effect on yield of roots and only a little on dry‐matter content.An application of limestone to a heavy soil, bringing the pH up to 8‐1, caused only negligible symptoms of raan in a swede crop and did not appear to fix any of the ap

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060307

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractSpecimens of coconut oil of Indonesian, Solomon Islands and Ceylonese origin have been found to contain the following fatty acids: caprylic 7.7,8‐1,7‐3; capric 9.7,8‐1,7.5; lauric 45.0,46.3,47‐8; myristic 18.0, 17.4, 18‐9; palmitic 8.4, 8‐6, 7‐6; stearic 3.7, 2‐0, 2‐5; arachidic —, 1.5, 0‐4; oleic 5‐8, 5‐5, 6‐3; linoleic 1‐5, 2‐2, 1‐7% (wt.).These data, taken in conjunction with earlier analytical figures, indicate that the composition of coconut oils produced in widely scattered regions remains practically constant.The oil consists of a very complex mixture of mixed triglycerides, only two components of which (myristodilaurin and lauromyristopalmitin

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060308

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe component fatty acids of a specimen of palm‐kernel oil [with characteristics: saponification equivalent 230–5, iodine value 16–7, free acidity (as lauric acid, per cent.) 8–1, unsaponifiable matter 1‐6%] were found to be: caprylic 2–4, capric 3–7, lauric 45–2, myristic 18–6, palmitic 8–5, stearic 2–5, arachidic 1–9, oleic 15–1, linoleic 2–1% (wt.).The oil is a complex mixture of mixed triglycerides; the major components are myristodilaurin 27–2, caprolauro‐olein 12–2, lauromyristo‐olein 10–6%. No other component

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060309

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe distribution of pores in egg shells has been studied by using a counting technique described in an earlier paper. The distribution is very different from the Poisson form, and different, but less so, form the negative binomial form. A new distribution, based on a modification of the Poisson form, has been developed, and this appears to fit the data quite well. The distribution is such as to give an arrangement of pores lying somewhere between randomness and complete uniformity, and a possible reason for this is discussed.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740060310

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY