摘要:

The camera is intended for photographing at regular predetermined intervals, or at desired instants, a number of instrument dials contained within the camera base. Records are made on 35 mm. film. The magazine is small and easily detachable to permit loading and unloading. Exposure is obtained by flashing lights, thus eliminating the need for a shutter. After each exposure the film is automatically reset.

ISSN:1923-4287    

DOI:10.1139/cjr44f-004

出版商:NRC Research Press    

年代:1944

数据来源: NRC

摘要:

Dried whole egg powders, treated with a number of substances prior to drying, were stored at temperatures from 23.9° to 47.7 °C. Deterioration in quality was assessed by fluorescence measurements, supported in some instances by palatability tests.Fluorescence development in powders containing sodium chloride in combination with either citric or lactic acid was more rapid than in the control powder. The effect was less marked when any of these substances was used alone. The addition of 15% sucrose was more effective in inhibiting fluorescence development at 23.9 °C. than at 37.2 °C. but had no effect at 47.7 °C. The addition of 0.2% sodium bicarbonate, an amount that did not affect the flavour of the powder, retarded deterioration as indicated by fluorescence and palatability tests. Other alkaline salts studied (sodium acetate, benzoate, citrate, salicylate, and tartrate) had no effect.

ISSN:1923-4287    

DOI:10.1139/cjr44f-005

出版商:NRC Research Press    

年代:1944

数据来源: NRC