Comparative biochemical studies of carotenoids in fish. XXVIII. The carotenoids of tilapia Tilapia nilotica.

Carotenoid content in some body parts of pike (Esox lucius L.) before, during, and post-spawning

“…a-Cryptoxanthin is rare in fishes. Up to now it has been found in the fins and the skin of several species of clupeids (Matsuno and Katsuyama 1976), in tropical marine yellow fish (Tanaka et al 1978) and in a few salmonids inhabiting Polish waters (Czeczuga and Bartel 1989).…”

Potential of Carotenoids in Aquatic Yeasts as a Phylogenetically Reliable Marker and Natural Colorant for Aquaculture

“…The skin as well as the fins of a specimen fed the formulated diet plus yeasts exhibited a distinctive orange to pink color that can be associated with the deposition of rhodoxanthin, a ketocarotenoid formed by the oxidation of zeaxanthin in Oreochromis niloticus. 32,33,35) In contrast, the skin of the fish cultured with the control diet remained grayishgreen, and a part of the caudal fin was unpigmented. Black carp were pigmented by feeding of the yeasts (Fig.…”

Carotenoids and polyterpenoids

“…The structures and absolute configurations of rehmaionosides A, B, and C , which are three new ionone glucosides from dried root of Rehmannia glutinosa, have been determined as (38), (39), and (40), respecti~ely.~~ The related monoterpene glucoside rehmapicroside (4 1) was also obtained. Further possible biosynthetic precursors of abscisic acid (42) have been identified, namely the 1',4'-trans-diol [3,6-diol in the carotenoid numbering scheme] (43) in and 3-hydroxy-y-ionylideneacetic acid (45) in the fungus Cercospora ~ruenta,~' and several metabolites of abscisic acid have been identified in leaves, namely 18-hydroxy abscisic acid (44)58* 59 and the conjugate metabolite the 17-[methy1-(3-hydroxy-3methylglutaryl)] ester of 17-hydroxyabscisic acid (46).60…”

“…138 An enantioselective synthesis of methyl ( +)-trisporate B from the (+)-enedione (186) has been described. 139 Several papers describe methods for the synthesis of the plant growth regulator abscisic acid (42) and related compounds. A four-step procedure from a-ionone proceeded via the acetylenic intermediates (187) and ( 188).140 An alternative route involved addition of the lithium salt of the acetylenic ester HCrCC(Me)=CHCO,Me to the protected ketone (189), which was prepared from isophorone.…”

“…238 The preparation and use of anhydroretinal (242) The use of formaldehyde in solvent mixtures has been recommended to permit the efficient extraction of the retinal chromophore in its original isomeric composition from visual pigments. 265 Methods for the separation, purification, and quantitative analysis of abscisic acid (42) and its derivatives by h.p.l.c., g.l.c., g.c.-m.s., and immunochemical methods266 -279 have been reported. The ( R ) and (S) enantiomers of methyl abscisate have been resolved by h.p.1.c.…”