ISSN:0022-5142    

DOI:10.1002/jsfa.2740050702

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractEthyl acetoacetate was found to be a satisfactory solvent for lignin, but not highly selective. The purest'ester lignins' were obtained from the residues after alkali extraction, and when mature plant materials were used these lignins showed little variation in methoxyl content. It is suggested that the percentage of methoxyl in pure lignin is not affected by plant maturity and that the true lignin present in a crude preparation may be determined from the methoxyl content by the use of an appropriate conversion factor.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050703

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractCertain chlorinated phenyl benzenesulphonates in current use for the control of mites infesting plants appear to function mainly as ovicides. 4‐Chlorophenyl 4‐chlorobenzenesulphonate and 2 : 4‐dichlorophenyl benzenesulphonate have been selected as being the most effective by American workers, whereas 4‐chlorophenyl benzenesulphonate appeared to be the most ovicidal of the esters examined in Britain.This paper describes the results of replicated assays of the ovicidal activities of phenyl benzenesulphonate and certain chlorinated derivatives towards the glasshouse red spider mite, and of leaf‐permeation studies involving summer eggs of the fruit tree red spider mite.4‐Chlorophenyl benzenesulphonate was found to be at least as ovicidal as 4‐chlorophenyl 4‐chlorobenzenesulphonate; differences between the five most potent compounds were significant at the LD50level, but not at the LD95level. Phenyl 4‐chlorobenzenesulphonate and the esters containing three or four chlorine atoms were of low or negligible activity.The ability of 4‐chlorophenyl benzenesulphonate to exert ovicidal action against eggs on the under surfaces of leaves after its application to their upper surfaces exceeded that of 4‐chlorophenyl 4‐chlorobenzenesulphonate and that of phenyl benzenesulphonate.Chlorination in thepara‐position of the phenyl ring of phenyl benzenesulphonate enhanced ovicidal action, whereaspara‐chlorination in the benzenesulphonic ring reduced it greatly. The effects ofpara‐chlorination in both rings do not appear to be merely a summation of the effects o

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050704

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractIn a series of practical tests on farms in the United Kingdom, procaine penicillin (procaine benzylpenicillin) was found to increase the growth rate of weaned pigs and to improve the efficiency of food utilization.Fortification of the diet with 10 g. or 15 g. of procaine penicillin per ton did not give significantly greater responses than did 5 g.; the economic level of addition may be less than 5 g. of procaine penicillin per ton under the conditions used.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050705

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractEgg shells from birds fed with either radioactive calcium or phosphorus have been examined by taking autoradiographs of tangential sections. The autoradiographs for calcium show a distinctive form of layering, which can be correlated with time of laying. This is interpreted as indicating that the supply of calcium to the shell gland may be made up entirely of food calcium or entirely of bone calcium or of varying proportions of the two, depending upon the time of day that a particular layer of the shell was being deposited. The autoradiographs for phosphorus indicate that most of it is in the outermost layer of shell, with some of it actually on the surface.

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050706

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractFat production by the mouldsAspergillus nidulans, Penicillium javanicum and Penicillium spinulosumhas been studied and media conducive to high productivity have been developed. The highest percentage yields of fat on sucrose utilized were 13.2 fromA. nidulans, 7.9 fromP. javanicumand 6.0 fromP. spinulosum, the last‐mentioned mould requiring corn‐steep liquor (C.S.L.) (0.5% w/v) for this result. In general, the levels of concentration of sodium phosphate and of magnesium sulphate in the medium have been shown to be highly critical fact

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050707

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractCollagen was determined in samples of fresh, frozen and freeze‐dried silverside by determining hydroxyproline in the acid hydrolysate of (i) the meat, (ii) the direct aqueous autoclave extract of the meat, and (iii) the aqueous autoclave extract of the residue left after preliminary extraction of the muscle tissue with dilute alkali or acid; collagen was also determined in (iii) as the loss of weight when the residue was autoclaved with wate

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050708

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

摘要:

AbstractTests have been made to determine whether some of the carbohydrates of the brown algae and of dried milled samples ofLaminaria cloustoniandAscophyllum nodosumcan be utilized by the mixed microflora of the bovine rumen when incubated in rumen liquid for 4 h. at 39°. The conversion of non‐protein nitrogen into protein and changes in pH were used as indications of utilization.Of the various products that were tested, only laminarin and the frond ofL. cloustoni, which contains laminarin, promoted the type of vigorous activity obtained under the same conditions with malto

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050709

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY

ISSN:0022-5142    

DOI:10.1002/jsfa.2740050701

出版商:John Wiley&Sons, Ltd    

年代:1954

数据来源: WILEY