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Influence of Preparative Procedure on the Purity of Chlorophyll Components as Shown by Absorption Spectra
1. An improved method for preparation of chlorophyll component solutions with reproducible spectroscopic properties is presented. The method is rapid and simple; sucrose is used, both for filtration… Expand
Peroxidase and polyphenol oxidase activity associated with Helminthosporium leaf spot of maize.
THE PREPARATION AND ABSORPTION SPECTRA OF FIVE PURE CAROTENOID PIGMENTS.
Studies on the carotenoids. 2. The isomerization of β-carotene and its relation to carotene analysis.
Photoelectric Spectrophotometry. An Apparatus for the Ultra-violet and Visible Spectral Regions: Its Construction, Calibration, and Application to Chemical Problems
Analytical Methods for Carotenes of Lycopersicon Species and Strains
ABSORPTION SPECTRA OF ALPHA AND BETA CAROTENES AND LYCOPENE.
From the viewpoint of carotenoid spectroscopy, several important changes have been made. The period required for a single reading has been reduced from 60 to 10 seconds. The length of the liquid path… Expand
Selection and Breeding for High β-Carotene Content (Provitamin A) in Tomato
1. High β-carotene concentration in tomato fruits has been obtained from selections of the cross [Baltimore x F1 (Rutgers x L. hirsutum P. I. 12644-5)]. One selection from this backcross generation… Expand
Provitamin A and Vitamin C in the Genus Lycopersicon
- R. Lincoln, F. Zscheile, J. Porter, G. Kohler, R. M. Caldwell
- Botanical Gazette
- 1 September 1943
Tomatoes are a good source of both provitamin A (X-carotene) and vitamin C, and they are of greater value in human nutrition as a source of essential vitamins and minerals than as a source of energy.… Expand
CAROTENE CONTENT OP FRESH AND FROZEN GREEN VEGETABLES1