Results 121 to 130 of about 1,717 (164)

Astaxanthin ester as a prosthetic group: A carotenoprotein from the hermit crab

Comparative Biochemistry and Physiology, 1966
Abstract 1. 1. It has been shown that a purple pigment isolated from the eggs and ovaries of the hermit crab (Eupagurus bernhardus L.) has absorption maxima at 280, 465, 495 and 580 mμ and is a carotenoprotein. 2. 2. Analysis of the carotenoids in the eggs has shown the presence of β-carotene, free and esterified astaxanthin.
D F, Cheesman, J, Prebble
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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

Oxidation evaluation of free astaxanthin and astaxanthin esters in Pacific white shrimp during iced storage and frozen storage

Journal of the Science of Food and Agriculture, 2018
AbstractBACKGROUNDIn this paper, the changes in free astaxanthin (F‐AST) and astaxanthin esters (AST‐Es) in Litopenaeus vannamei during iced storage and frozen storage were investigated. The liquid chromatography–atmospheric pressure chemical ionization tandem mass spectrometry method was used to quantify the molecular species of AST‐Es in shrimp ...
Xing Qiao, Lu Yang, Qun Gao, Shu Yang, Zhaojie Li, Jie Xu, Changhu Xue   +6 more
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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
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Purification of trans-astaxanthin from a high-yielding astaxanthin ester-producing strain of the microalga Haematococcus pluvialis

Food Chemistry, 2000
The purification method including extraction, saponification, and separation was established for preparing free trans-astaxanthin from a high-yielding astaxanthin ester-producing strain of the microalga Haematococcus pluvialis which contained 3.67% trans-astaxanthins and 1.35% cis-astaxanthins of the dry cells.
Yuan, JP, Chen, F
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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
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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
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Astaxanthin and Its Esters in Pigmented Oil from Fermented Shrimp By-Products

Journal of Aquatic Food Product Technology, 2016
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
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Accumulation of Triacylglycerols in Haematococcus Pluvialis is Correlated with that of Astaxanthin Esters

Journal of Phycology, 2002
AbstractThe chlorophyte Haematococcus pluvialis accumulates large quantities of astaxanthin under stress conditions. Under either nitrogen starvation or high light, the proportion of each picogram of astaxanthin was accompanied by that of 5 or 3–4 pg of fatty acids, respectively.
M. Zhekisheva, S. Boussiba, I. Khozin‐Goldberg, A. Zarka, Z. Cohen   +4 more
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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
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