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Acylated anthocyanins from organic purple-fleshed sweet potato (Ipomoea batatas (L.) Lam) produced in Brazil Scientia Agricola
Jesus,Monalisa Santana Coelho de; Santiago,Manuela Cristina Pessanha de Araújo; Pacheco,Sidney; Gouvêa,Ana Cristina Miranda Senna; Nascimento,Luzimar da Silva de Mattos do; Borguini,Renata Galhardo; Guerra,José Guilherme Marinho; Espindola,José Antonio Azevedo; Godoy,Ronoel Luiz de Oliveira.
ABSTRACT Acylated anthocyanins from a purple-fleshed sweet potato (PFSP), obtained by organic cultivation in Brazil, were characterized after separation by a high performance liquid chromatography-diode array detector (HPLC-PDA). These anthocyanins were manually collected at the detector output, concentrated and injected into a high resolution mass spectrometer (ESI-QTOF-MS2). Twenty-two acylated anthocyanins were detected. Among them, sixteen had been reported in the literature and six, derived from peonidin were reported for the first time in sweet potato roots in this study. These compounds showed molecular ions with accurate mass/charge ratios (m/z) of 909.2081, 961.3010, 961.2571, 963.3345, 1123.2932 and 1179.3862. Although anthocyanins in PFSP have...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenolic; Mass spectrometry; Natural dye; Antioxidant.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400901
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ARE ECO-LABELS VALUABLE? EVIDENCE FROM THE APPAREL INDUSTRY AgEcon
Nimon, R. Wesley; Beghin, John C..
Using U.S. apparel catalogue data, we estimate hedonic price functions to identify market valuation of environmental attributes of apparel goods. We identify a significant and robust premium for the organic fibers embodied in the apparel goods. We find an additional organic premium for baby items. However, we do not find evidence of a premium for environment-friendly dyes. We further investigate the pricing behavior of apparel suppliers for potential departure from competitive pricing of this environmental attribute and find no evidence different premium across firms, suggesting price-taking behavior in the environmental attribute space.
Tipo: Conference Paper or Presentation Palavras-chave: Eco-labels; Organic-cotton apparel; Natural dye; Hedonic price; Agribusiness; Environmental Economics and Policy; Q20; L81; L67.
Ano: 1998 URL: http://purl.umn.edu/21016
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Effect of ph on the stability of red beet extract (Beta vulgaris l.) microcapsules produced by spray drying or freeze drying Ciênc. Tecnol. Aliment.
ANTIGO,Jéssica Loraine Duenha; BERGAMASCO,Rita de Cássia; MADRONA,Grasiele Scaramal.
Abstract Red beets is rich in phenolic acids and has high antioxidant capacity, and can be used to produce a natural dye. This study evaluated the effect of pH (3 to 6) on the stability of red beet extract microcapsules, dried by freeze drying and spray drying and stored at room temperature. The microcapsules were produced using a combination of maltodextrin and xanthan gum as encapsulating agents and stored for 7 days. For all evaluated microcapsules, a degradation of betanin was observed, however, that degradation was independent of pH, with the exception of the sample with maltodextrin and dried by spray drying. The freeze dried products showed lower degradation constants and higher half-life (t1/2) when comparing with the spray dried samples. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Encapsulation; Natural dye; Betanin; Phenolic compounds; Maltodextrin; Xanthan gum.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000100072
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Extraction of Indigo from Some Isatis species and Dyeing Standardization Using Low-technology Methods BABT
Comlekcioglu,Nazan; Efe,Lale; Karaman,Sengul.
Fresh leaves of four Isatis species culture form of I. tinctoria L and wild forms of I. buschiana Schischkin, I. candolleana Boiss. (endemic) and I. tinctoria L. subsp. corymbosa. (Boiss.) were used for indigo production. Dyes were extracted by fermentation and hot water application. The extracted dyes were optimized with different pH and reducing agents. Results showed that the dye from hot water application produced the desired dying quality at pH 11. Reducing agent concentrations had no significant effect on color quality. Dark blue and blue colors were obtained from I. tinctoria and I. candolleana extracts although I. tinctoria subsp. corymbosa and I. buschiana produced mostly yellow-gray colors. Light, dry and wet rubbing fastness values varied...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Isatisspp.; Woad; Indigo; Natural dye; Fermentation; Fastness; Spectrophotometry.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000100096
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Harnessing Natural Colorants for Sustainable Textile Dyeing an Eco-Friendly Approach Using Sweet Cane (Saccharum Bengalense Retz.) Inflorescence BABT
Raza,Ali; Iqbal,Naeem; Mahmood,Saqib; Parveen,Shagufta; Azeem,Muhammad; Nawaz,Muhammad; Javed,M Tariq; Noman,Ali.
ABSTRACT The excessive industrial use of dye producing plants has threatened the existence of these species and biodiversity. Exploration of abundantly available natural dye sources not only provide industrial benefits but also share the load of dye yielding plants. In the present study we used the inflorescence of munj sweet cane (Saccharum bengalense Retz.) to extract natural colorant for textile industry. This easily available plant is cheap source of natural colorants and good alternative of synthetic dyes. The munj sweet cane inflorescence extract and fabric was treated with microwave radiations. The dyeing aspects like temperature, time, fabrics to extract ratio, salt type and salt concentrations were optimized. Pre-and post mordanting was carried...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irradiation; Natural dye; Munj sweetcane; Color fastness; Mordanting; Spectraflash.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100702
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Photoelectrochemical solar cell using extract of Eugenia jambolana Lam as a natural sensitizer Anais da ABC (AABC)
Garcia,Christian G.; Polo,André S.; Iha,Neyde Y. Murakami.
The extract of Jambolão (java plum), Eugenia jambolana Lam, was used as a natural sensitizer of a wide band-gap semiconductor (TiO2) in photoelectrochemical solar cells. The natural dye, adsorbed onto the semiconductor surface, absorbs visible light and promotes electron transfer across the dye/semiconductor interface. Photogenerated current and voltage as high as 2.3 mA and 711 mV, respectively, were obtained and effective conversion of visible light into electricity was achieved. The use of a natural product as the semiconductor sensitizer enables a faster and simpler production of cheaper and environmentally friendly solar cells.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Photoelectrochemical solar cell; Natural dye; Jambolão (java plum); Energy conversion; Dye sensitized solar cells.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000200004
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