Absorption spectra of suspensions of carotene crystals

The absorption spectra of suspensions of living micro-organisms.

Absorption of carotene in man.

According to the report of the national nutritional survey performed by the Ministry of Health and Welfare, over 90 per cent of source for vitamin A of the Japanese is provltamin A, especially, ƒÀ-carotene. It is therefore an impor tant problem to know the absorbability of carotene by the Japanese for estab lishing the dietary allowance of vitamin A for the nation. Though a number of studies co...

SYNTHESIS AND ELECTRONIC ABSORPTION SPECTRA OF SOME METHOXY HALF-ANALOGUE OF MICHLER'S HYDROL BLUE

The present work comprises the synthesis of one series of diarylmethane dyes containing one or more terminal methoxy substituents together with a variable tertiary amino group. The electronic absorption spectra of the dyes have been determined. As the conjugation of the terminal nitrogen atom improves in the sequence NMez > Kairoline > Julolidine, a progressive hypsochromic shift is observed

Cxi. Carotene and Vitamin A. the Transformation of Carotene into Vitamin a as Shown by a Study of the Absorption Spectra of Rat-liver

MOORE [1929, 1930] has advanced evidence to show that when highly purified carotene is administered to rats it is not stored in the liver in an unchanged condition, but suffers conversion to vitamin A. Among other evidence in favour of this view, preliminary results obtained by the present author in regard to the absorption spectra of the liver oils of rats receiving carotene were quoted. These...

Polarized absorption spectra of green fluorescent protein single crystals: transition dipole moment directions.

Polarized absorption spectra of orthorhombic crystals of wild-type green fluorescent protein (GFP) were measured between 350 and 520 nm to obtain information on the directions of the electronic transition dipole moments ((-->)m) of the chromophore relative to the molecular axes. The transition dipole moment orientation is a basic spectroscopic parameter of relevance to biologists when interpret...