We examined the adjustment of leaf angle (L theta) and foliar chlorophyll and xanthophyll chemistry in Eucalyptus nitens (Deane and Maiden) Maiden seedlings maintained in various nitrogen (N)-supply treatments over a 6-month period. Adjustment of L theta toward the vertical was greatest under conditions of foliar N deficiency and became incrementally more horizontal with increasing foliar N con...

The chemopreventive effects of two xanthophylls, astaxanthin (AX) and canthaxanthin (CX) on oral Carcinogenesis induced by 4-nitroquinoline I-oxide (4-NQO) was investigated in male F344 rats. Rats were given 20 ppm of 4-NQO in their drinking water for 8 weeks to induce oral neo plasms or preneoplasms. Animals were fed diets containing 100 ppm AX or CX during the initiation or postinitiation pha...

Abstract Dumai is one of the coastal waters Indonesia that has potential for biodiversity microorganisms including anoxygenic photosynthetic bacteria (APB). Anoxygenic are carry out decomposition activities even though oxygen levels in water and sediment very little or absent. This study aims to determine from aquatic sedimentary ecosystems Dumai, Indonesia. research was conducted by an experim...

In the search for a better and brighter future, use of natural luminescent renewable materials as substitutes synthetic ones in energy field is prime importance. The incorporation pigments (e.g., xanthophylls phycobiliproteins) fundamental step broad spectrum applications that are presently marred by their limited stability. bio-based molecules into solid matrices allows fabrication thin films,...

In the first paper of this series (Steven, 1948) it was shown that the tissues of the trout (Salmo trutta Linn.) normally contain j8-carotene, lutein and astacene. Lutein and astacene occur as esters in the red and yellow chromatophores of the skin, and may also be present in the muscles as free hydroxy-carotenoids. Carotene is present in the liver, which also contains xanthophylls but no astac...

Green microalgae contain many active pigments such as carotenoids having antioxidant and protective activity on human cells. Here we investigate the biological activity of an ethanol/water extract of the marine green microalga Tetraselmis suecica containing high levels of carotenoids such as the xanthophylls lutein, violaxanthin, neoxanthin, antheraxanthin and loroxanthin esters. This extract h...

Sugarcane genotypes such as tolerant (Co 99004), and sensitive (Co 97010) were subjected to NaCl (170 and 250mM) and Poly ethylene glycol (-0.8Mpa and -1.7Mpa) treatment and evaluated through biochemical and molecular analysis to assess the commonness between salinity and drought stress. Among the biochemical characters analyzed total chlorophyll decreased and proline, lipid peroxidase, xanthop...