摘要:

The averages and ranges for thiamine in approximately 250 samples of cereals tested, expressed as μgm. per gm., were: barley 4.2 (3.3–5.7), oats 6.7 (3.8–8.6), wheat 4.5 (3.4–5.9); for riboflavin: barley 1.3 (0.9–1.6), oats 1.3 (1.0–1.7), wheat 1.2 (1.0–1.4). There was a marked increase in the thiamine content of oats over that for 1946—amounting to 0.7 μgm. per gm. Barley and wheat showed slight increases. The values for riboflavin in the three cereals grown in 1947 were about the same as those for the 1946 samples. Varietal effects on thiamine content differed somewhat from those observed in 1946. For barley, Garton, OAC21, Sanalta, and Montcalm were about equal and slightly better than Plush. The order of thiamine content of wheat—for those varieties of which more than 10 samples were tested—was Carlton, Regent, Redman, Thatcher, and agreed with the findings for the previous year. Durum wheats showed higher thiamine levels than spring wheats. There was no varietal effect on the thiamine content of oats. There was no varietal effect on riboflavin content of any of the cereals. None was observed for the 1946 samples. For 1946 no soil zone effect on vitamin content of any of the cereals was noted. In 1947 rendzina and black earth soils produced wheats with higher thiamine contents. An environmental effect other than that for soil zone on the thiamine and riboflavin content of wheat and oats was confirmed.

ISSN:1923-4287    

DOI:10.1139/cjr50f-030

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

The polymerization of isoprene has been initiated by peroxide–peroxidase, by various inorganic and organic catalysts, and by air oxidation and anodic oxidation. At moderately high conversion, polymers of isoprene have shown zero gel content and a dilute solution viscosity from 1.5 to 4. The physical properties of some of the polymers have been measured either in our laboratories or those of the Polymer Corporation of Canada.

ISSN:1923-4287    

DOI:10.1139/cjr50f-031

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

not available

ISSN:1923-4287    

DOI:10.1139/cjr50f-032

出版商:NRC Research Press    

年代:1950

数据来源: NRC