Hydroid Pigments. I. General discussion and pigments of the Sertulariidæ

Pigments of the Retina

1. The interrelations of visual purple, retinene, and vitamin A in the bull frog retina are analyzed in simple experiments, the results of which are presented in a series of automatically recorded spectra. 2. Observations are reported upon the distributions, properties, and concentrations of xanthophyll, vitamin A, and flavine in the pigmented tissues of the eye.

Fossil pigments

Johan Lindgren introduces fossil pigments.

The Carotenoid Pigments

the relationship between academic self-concept and academic achievement in english and general subjects of the students of high school

according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...

Origin of Bile Pigments

S. H. ROBINSON (Boston) described a new experimental technique for studying the early labelled component of bilirubin in the ligated bile duct of the Gunn rat. Using 14C bilirubin he measured the total miscible bilirubin pool. In addition, the rate of bile pigment formation following the administration of 2-14C glycine was estimated. This allowed precise assessment of bilirubin and haem product...