Results 171 to 180 of about 4,601 (217)

Potential Health and Nutraceutical Applications of Astaxanthin and Astaxanthin Esters from Microalgae

2019
This chapter focuses on the production of astaxanthin and its esters from Haematococcus pluvialis. It aanlyses the occurrence of astaxanthin in nature, its accumulation, biomass production, downstream processing, chemistry and its possible role in various biological activities.
Ambati Ranga Rao, Gokare A. Ravishankar
openaire   +1 more source

Fatty acids of astaxanthin esters in krill determined by mild mass spectrometry

Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2003
Krill is a major source of astaxanthin, which has strong antioxidant activity. Fractions with astaxanthin monoesters and diesters of Antarctic krill Euphausia superba were isolated. Astaxanthin esters were separated by C18-HPLC depending on the number of carbons and double bonds of esterified fatty acid(s). Small amounts of other lipids remained in the
Shinichi, Takaichi, Kumi, Matsui, Masahisa, Nakamura, Mizuho, Muramatsu, Satoshi, Hanada   +4 more
openaire   +2 more sources

Effective Inhibition of Skin Cancer, Tyrosinase, and Antioxidative Properties by Astaxanthin and Astaxanthin Esters from the Green Alga Haematococcus pluvialis

Journal of Agricultural and Food Chemistry, 2013
Astaxanthin mono- (AXME) and diesters (AXDE) were characterized and examined for anticancer potency with total carotenoids (TC) and astaxanthin (AX) against UV-7,12-dimethylbenz(a)anthracene (DMBA)-induced skin cancer model in rat. At 200 μg/kg bw, AXDE and AXME reduced UV-DMBA-induced tumor incidences up to 96 and 88%, respectively, when compared to ...
Ambati Ranga, Rao, H N, Sindhuja, Shylaja M, Dharmesh, Kadimi Udaya, Sankar, Ravi, Sarada, Gokare Aswathanarayana, Ravishankar   +5 more
openaire   +2 more sources

Influence of oil matrixes on stability, antioxidant activity, bioaccessibility and bioavailability of astaxanthin ester

Journal of the Science of Food and Agriculture, 2020
AbstractBACKGROUNDAstaxanthin ester (Asta‐E) is used as functional nutraceuticals in many food products. Unfortunately, Asta‐E utilization is currently limited owing to its chemical instability and low bioavailability. The purpose of this study is to investigate the promotion effect of oil matrixes on the stability, antioxidant activity ...
Lu Yang, Jiayu Gu, Tianle Luan, Xing Qiao, Yunrui Cao, Changhu Xue, Jie Xu   +6 more
openaire   +2 more sources

Synthesis of Lutein and Astaxanthin Esters and Their In Silico Activity

Russian Journal of General Chemistry, 2019
Esters of individual natural carotenoids lutein and astaxanthin with benzoic, 4-methylbenzoic, nicotinic, and mandelic acids have been synthesized. The esterification reaction of carotenoids has been carried out in an anhydrous medium at 37°C using of Novozyme 435 biocatalyst.
S. V. Pechinskii, A. G. Kuregyan, E. T. Oganesyan, E. F. Stepanova   +3 more
openaire   +1 more source

Chromatographic, NMR and vibrational spectroscopic investigations of astaxanthin esters: application to “Astaxanthin-rich shrimp oil” obtained from processing of Nordic shrimps

The Analyst, 2015
Synthesized astaxanthin esters were used as benchmarks for the spectroscopic studies of natural astaxanthin found in shrimp oil.
B, Subramanian, M-H, Thibault, Y, Djaoued, C, Pelletier, M, Touaibia, N, Tchoukanova   +5 more
openaire   +2 more sources

Astaxanthin and Its Esters in Pigmented Oil from Fermented Shrimp By-Products

Journal of Aquatic Food Product Technology, 2015
ABSTRACTThis study focuses on the isolation and quantification of astaxanthin and its esters in the oils extracted from shrimp waste. The content of astaxanthin was determined by high performance liquid chromatography and ranged from 1.5 to 2.1 mg g−1.
José A. Núñez-Gastélum, Dalia I. Sánchez-Machado, Jaime López-Cervantes, Jesús R. Rodríguez-Núñez, Ma. A. Correa-Murrieta, Reyna G. Sánchez-Duarte, Olga N. Campas-Baypoli   +6 more
openaire   +1 more source

High production of unexpected carotenoids in Dinophyceae. Astaxanthin esters from the freshwater dinoflagellate Tovellia sanguinea

Biochemical Systematics and Ecology, 2006
Abstract A wide range of photopigments biosynthesised by a unialgal cell culture of the red dinoflagellate Tovellia sanguinea , the blooms of which were responsible for the summer reddening of the waters of the Lake Tovel until 1964, have been identified through reversed-phase high pressure liquid chromatography (HPLC) coupled to photodiode array ...
Frassanito, Rita, G. Flaim, Mancini, Ines, Guella, Graziano   +3 more
openaire   +4 more sources

Separation and identification of astaxanthin esters and chlorophylls in Haematococcus lacustris by HPLC

Biotechnology Techniques, 1996
An isocratic reverse-phase high performance liquid chromatographic method was developed for the separation of carotenoids and chlorophylls from extracts of Haematococcus lacustris. Astaxanthin monoesters are the principal carotenoids in Haematococcus lacustris.
Jian-Ping Yuan, Xian-Di Gong, Feng Chen
openaire   +1 more source

Singlet oxygen quenching ability of astaxanthin esters from the green alga Haematococcus pluvialis

Biotechnology Letters, 1999
The singlet oxygen quenching activities of carotenoids, β-carotene, free astaxanthin, its monoester and its diester, were examined in vitro by a simple and rapid method for the measurement of Methylene Blue-sensitized photooxidation of linoleic acid in the hexane/ethanol solvent system.
M. Kobayashi, Y. Sakamoto
openaire   +1 more source