摘要:

Total nitrogen in developing wheat kernels was fractionated to give non-protein nitrogen and three protein fractions. Each fraction was hydrolyzed and analyzed for amide and arginine nitrogen.All fractions increased in amide and decreased in arginine nitrogen during kernel development. The main portion of the water-soluble protein is static in nature, and is considered to play no part in the metabolism of the endosperm proteins. The trend, with time, of amide in the two other protein fractions (soluble and insoluble in normal potassium iodide) was closely parallel to the trend of amide in non-protein nitrogen. The chemical nature of each of the gluten fractions in flour from the most insoluble to the most soluble is determined by the chemical nature of successive portions of the non-protein nitrogen in the wheat kernel at progressive stages of maturity.

ISSN:1923-4287    

DOI:10.1139/cjr38c-027

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

A new species of Coniosporium—C.Mali—parasitic on the crab-apple and several varieties of the common apple, is described. The symptoms of the disease, both on the foliage and the fruit, are similar to those produced byFusicladium dendriticum. Therefore, Coniosporium scab is suggested as the common name.

ISSN:1923-4287    

DOI:10.1139/cjr38c-028

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The relation between texture of soils of Missisquoi and Brome Counties and the growth of alfalfa thereon is examined. It is shown that soils on which alfalfa thrives contain relatively more coarser soil particles. The effect of treatment with lime upon the rate of evaporation of water from the soil, moisture equivalent, heat of wetting, volume weight under field conditions, volume weight of laboratory samples, pore space, moisture content of saturated soil, volume expansion upon wetting, and resistance of the soil to penetration is investigated. Treatment with lime produces a significant effect upon several of these properties. New apparatus is described to measure the volume weight of soilin situand to measure the resistance of the soil to penetration.

ISSN:1923-4287    

DOI:10.1139/cjr38c-029

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

Fifty-three samples from various horizons of virgin soil from different parts of the province have been analyzed for the following properties: organic carbon, loss on ignition, clay, silt, sand, moisture at the sticky point, moisture take up at 50% relative humidity, pore space, heat of wetting, volume expansion, maximum moisture taken up, index of texture, apparent and absolute specific gravity. Correlation coefficients and regression equations have been derived to trace the relations existing between these properties, and it is shown that the organic content of the soil is the most important factor in determining the physical behavior. A comparison of the pipette and hydrometer methods of mechanical analysis is described.

ISSN:1923-4287    

DOI:10.1139/cjr38c-030

出版商:NRC Research Press    

年代:1938

数据来源: NRC