ISSN:0021-8871    

DOI:10.1002/jctb.5010100910

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractA method is described which uses a simple freezing point apparatus and a mercury‐in‐glass thermometer for the determination of the γ‐benzene hexachloride content of samples of lindane.Collaborative results from four co‐operative laboratories showed that the method gives reliable and reproducible results, in good agreement with those found by a differential refractrometric method.A pure reference sample of γ‐benzene hexachloride was prepared by zone‐refining and values for its freezing point and cryoscopic constant measured by a platinum resistance thermometer were in good accord with the data of T

ISSN:0021-8871    

DOI:10.1002/jctb.5010100902

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractPrevious work on the use of small specimens for testing cement is reviewed and some new work done with 1/2 in. vibrated mortar cubes is described. Programmes of work involving the use of such cubes are outlined to demonstrate the value of the technique used.

ISSN:0021-8871    

DOI:10.1002/jctb.5010100903

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractPhyllocladene is the main constituent of the essential oils ofP. nivalisandD. laxifolium.

ISSN:0021-8871    

DOI:10.1002/jctb.5010100904

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractComponents isolated from acid and lime processed gelatins by a heat denaturation and coagulation technique are shown to be mucoproteins contaminated with smaller amounts of gelatin and lipid, and probably having their origin in the alkali‐soluble mucoproteins of the connective tissues used for the manufacture of the gelatins. Differences in amino‐acid composition of the isolated materials are noted. From comparisons of these with materials isolated by other techniques it is concluded that at least two types of mucoproteins are found in gelatins; one of these originates from the alkali‐soluble mucoproteins of the connective tissues and the other from materials similar to the acetic‐acid‐soluble fraction from connective tissue not precipitate

ISSN:0021-8871    

DOI:10.1002/jctb.5010100905

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractA study has been made of the adsorption of51Cr, from aqueous solutions of labelled potassium dichromate, on to coarse magnesium powder at room temperature. The measurement of the rate of uptake of51Cr on the powder and comparison with a magnesium standard of known area has led to a simple method for the determination of the surface area of the powder.

ISSN:0021-8871    

DOI:10.1002/jctb.5010100906

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractAn investigation has been made of the removal of fulvic acids from water by different types of water‐treatment. The plants studied are in different parts of England and Wales; the results indicate that the removals from different raw‐waters are similar in similar plant. Weakly basic resins remove about 75·10% of the fulvic acids, and lime‐soda softening, at the one plant studied, removes about 40–50%. The results for alum coagulation and filtration fall into two groups with removals of about 50·10% a

ISSN:0021-8871    

DOI:10.1002/jctb.5010100907

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractThe oxidation of magnesium sheet, polished by surface evaporation, has been investigated, with the aid of the thermal balance, and in the early regions by a manometric method, at temperatures between 470° and 570° and for times up to 120 h. in dry oxygen.The oxidation curves of weight‐gain against time show, in most cases investigated, three main regions; (1) an early region, during which lateral growth of white oxide across the metal is observed; (2) a linear branch, in which the rate of thickening and of cracking of the oxide film are apparently equal; (3) a stage in which the rate is initially higher than for the two preceding regions although it tends to decrease with increase of time.The reaction mechanism is discussed in view of the current theories of the oxidation of met

ISSN:0021-8871    

DOI:10.1002/jctb.5010100908

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

摘要:

AbstractFrom dissolution experiments of the respective zirconium alloys in HF it is shown that oxygen is not occluded in zirconium, but is bound to form domains of ionised ZrO2, which may agglomerate to ZrO2grains, sparingly soluble in HF while the alloy is soluble in dilute HF. Conversely, hydrogen is occluded or dissolved in zirconium (forming ZrHx), but probably only in those parts of the metal which are free of Zr4+and O2‐ions (of ZrO2). Thus the solubility of H2in this free Zr should be higher than that usually reported by various authors who consider only the weight of oxygen.When ZrHxis dissolved in HF, the Hxis quantitatively liberated as a gas; ZrO2when present in the samples and especially when present as a surface film remains as a residu

ISSN:0021-8871    

DOI:10.1002/jctb.5010100909

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010100901

出版商:John Wiley&Sons, Ltd    

年代:1960

数据来源: WILEY