摘要:

AbstractThe presence of considerable quantities of starch in the banana pseudostem has been demonstrated for the first time. Evidence is presented to show that the starch content of the stems varies and is influenced by the variety, locality, stage of growth, physiological state of the plant and climatic conditions, and particularly by the moisture content of the stems. The desirability of screening varieties with a view to selecting consistent yielders has been emphasized.The process evolved for the manufacture of banana pseudostem starch is outlined, and the potentialities of this new raw material as a source of starch indicated.Physico‐chemical properties of the starch have been described. The starch can be used for industrial and edible purposes in place of ordinary starches. Sizing tests have shown that it compares very favourably with the common starches and, in view of the some‐what transparent nature of the pastes, imparts better lustre to the finished go

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080502

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractSince 1951 untreated and commercially treated flours of different extraction rates have been stored under temperate conditions for eight‐month periods and periodically examined to ascertain the naturally occurring change in baking quality. Doughs were tested by physical methods and other data associated with flour testing obtained. An increase in flour water absorption required to make doughs of normal consistency was observed which in part can be explained by drying out of the flour on storage. A slight toughening in doughs prepared from the earlier untreated flour was evident and was associated with some improvement in bread quality up to storage periods of about 4 months. The change, however, was very much less than has generally been supposed and in no case was it comparable in extent to the improvement in flour produced immediately by commercial gaseous and/or powder treatment. The slight natural toughening of the doughs from treated flour was in some cases detrimental to bread quality. No significant change in the breadmaking properties of flour could be detected during the first few days after millin

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080503

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractPublished methods for the determination of total sulphur in soil are reviewed. A method is described for determining total sulphur in soil in which all the sulphur is reduced to sulphide by heating the soil with ferrum reductum. The sulphide is treated with acid and the evolved hydrogen sulphide estimated iodimetrically with standard alkaline hypochlorite solution as absorbent. The method is specific for sulphur. It has been found applicable to the determination of sulphur in soils of widely diverse origins and in many kinds of pure substances, both organic and inorganic. An error of ± 2.5% can be expected in the determination of total sulphur in soil

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080504

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractBy the use of a balance technique for growing chicks fed a low mineral diet it is shown that a significant increase in calcium retention in the body is brought about by the addition of penicillin to the diet. The significance of this finding is discussed in relation to growth experiments with antibiotics and their mode of action in growth stimulation.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080505

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractInformation concerning rodent fats is extended to the component acids of mouse, porcupine and rabbit fats. Whereas mouse and rabbit fat accord with the general features of rodent fat composition, porcupine fat differs from the general pattern in several respects.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080506

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA quantitative investigation of the component acids of flamingo fat shows it to be similar to other bird fats.A sample of antelope fat has been examined. This differs from other ruminant fats in its high iodine value which is reflected in an unusually low content of saturated acids and increased proportions of unsaturated acids.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080507

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractConsideration of the composition of animal fats containing little or no C20–22‐acids (39 fats of iodine value 31–96 from 30 genera) suggests an empirical relation between the iodine value and the amount of each component acid. This relation is expressed mathematically and the general conclusions are stated.Changes in iodine value are reflected almost entirely in the varying proportions of saturated, mono‐ and poly‐ethenoid C18‐acids. The changes in the proportion of each of these in animal fats of iodine value 90 falling to 30 are parallel to changes which occur during selective hydrogenation of mixtures of stearate, oleate and linoleate.‘Stearic‐rich’ depot fats appear to be produced only by ruminants, quasi‐ruminants and rumin

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080508

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractIn sixteen field experiments carried out on the potato crop in south‐east Scotland using different rates of superphosphate, little or no response in total yield was recorded except on four soils containing very little ‘available’ phosphate. Several of the experimental crops were riddled and the yields of ware, seed and chats recorded. On soils containing easily soluble phosphate at a level higher than 12 mg. per 100 g. of soil, the yields of ware and seed potatoes were not appreciably raised by increased levels of applied phosphate. In the low‐phosphorus soils the maximum yields of ware and seed were reached at dressings of 5 and 10 cwt. of superphosphate respectively. The optimum rate of superphosphate was approximately 5.0 cwt. per acre for the low‐phosphate soils, and 1.5 cwt. for the soils with higher available

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080509

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractA sample of horsebean (Vicia fabaL.) was analysed for its amino‐acid contents, by chromatography on buffered filter paper. The results were in general agreement with those obtained by microbiological assay and already reported in the literature. The coefficients of variation for the determination of different amino‐acids ranged from 1.5% to 8.5%.Eighteen amino‐acids have been determined similarly in the whole grains of five species of pulses commonly grown in West Pak

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080510

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY

摘要:

AbstractRadioactive phosphorus is used in the estimation of the surface phosphate of apatite rock. Surface areas of these materials calculated from these estimates are smaller than those derived from gas‐adsorption methods. Less than 2.5% of the total phosphorus exists as surface phosphorus in the 100‐mesh size fraction of these materi

ISSN:0022-5142    

DOI:10.1002/jsfa.2740080511

出版商:John Wiley&Sons, Ltd    

年代:1957

数据来源: WILEY