Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Colorants"”.
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Characterization of pigments from cultivated Amaranthus species and assessment of their commercial applications as natural food colorants
… food industry to replace synthetically produced colorants with naturally derived alternatives. Of these, betalain pigments derived from beets (Beta vulgaris L.) serve as an important alternative to the synthetic dye FD&C Red 40 for many different low-acid food applications. Betalains are a …
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Application d’argiles locales du nord du maroc pour le traitement des effluents liquides contaminés par les colorants organiques et les métaux lourds
… de traitement des eaux usées contaminées par des colorants organiques et des métaux lourds. Il s’inscrit dans une perspective de développement local durable, qui consiste à mettre en place des approches efficaces pour préserver la qualité de l’eau et protéger l’environnement contre les polluants …
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Characterizing organic colorants in mock-ups of a 15th-century Iranian Timurid Qur'an by direct analysis in real time time-of-flight mass spectrometry
… spectrometry (DART-MS) to identify the organic colorants in complex mixtures that are expected to be present in the manuscript pages from the DIA. Mock-up samples were made using different combinations of pigments, dyes, binders, and sizing materials that would have been used in the region and …
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Phytochemical diversity and genetics of purple corn
… natural products has spurred interest in natural colorants, especially from sources rich in anthocyanins, red to purple plant pigments. Anthocyanin-rich purple corn is being explored as a potential economical source of natural colorant. Our recent survey of colored corn maize germplasm identified …
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Characterization of anthocyanin production in maize germplasm
… a search for more economic sources of natural colorants. Maize has been used a natural source of color for centuries. South American cultures in particular use purple corn varieties termed “Maize Morado” in foods and beverages. Maize has economic potential as a value-added source of natural …
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Color stability and phenolic composition from corn pericarp extracts in a beverage model and protective and anti-inflammatory potential of anthocyanin-rich plant extracts on celiac disease in vitro
… are increasing in popularity as natural colorants but are less stable than synthetic colorants. Celiac disease is an autoimmune disorder that affects the small intestine when gluten, a protein found in wheat, rye and barley is consumed, the immune system responds producing inflammation …
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Development of optimal dyeing methods with natural dyes for environmentally friendly hemp textile
… on the formulation for dyeing with natural colorants, optimization of the dyeing techniques, and development of the best procedure. This research used a full factorial design of experiments to best optimize the dyeing procedure. Independent variables included dye type, mordant type, dye …
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Traitement des émissions gazeuses par adsorption
… Il peut éliminer les produits toxiques, les colorants, en fait la plupart des produits qui contribuent à contaminer les cours d'eau. Le charbon actif est très efficace aussi dans l'épuration des rejets gazeux, que ces rejets soient toxiques ou non, et bien sûr il est utilisé pour la …
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Analysis and processing issues of plastic color mismatch
… Polymers are generally colorless and need colorants in order to have some color. One or more pigments in certain ratios can be used to give a specific color to plastics. Slight variations in the proportions of either of the used pigments, or their dispersion, may result in a color that is …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
… small molecules like pharmaceuticals and colorants using nanoporous membranes. Reverse osmosis (RO) separates smaller constituents like ions and sugars from solvents using non-porous dense polymeric membranes. Both NF and RO membranes are commonly thin film composites (TFC) made via …
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Algal control and prevention technologies for Lake Diefenbaker irrigation canals
… and treatment options: 1) Non-toxic dyes and colorants, 2) microbubbles and nanobubbles, and 3) Ultrasound technology. The use of microbubbles and nanobubbles technology was selected as the most suitable option. Although highly efficient, the other options failed because of their high costs …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
… small molecules like pharmaceuticals and colorants using nanoporous membranes. Reverse osmosis (RO) separates smaller constituents like ions and sugars from solvents using non-porous dense polymeric membranes. Both NF and RO membranes are commonly thin film composites (TFC) made via …
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Total Metal Analysis in Hookah Tobacco (Narghile, Shisha) – an Initial Study
… sample is made up of honey/molasses, glycerin, colorants and flavorings, but this study shows the hot water extract to be relatively free of toxic elements. The elemental ranges found for the homogenized hookah mixtures are as follows: V, 0.03 - 0.16 μg g<sup>-1</sup>; Cr, 0.15 - 0.37 μg …
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Developing a spectroscopy-based high throughput assay for anthocyanin content in corn
Anthocyanins are one of the only natural colorants approved by the US Food & Drug Administration (FDA) and hence, are highly sought after as natural color pigment for the food industry. However, anthocyanins are susceptible to gradual degradation when exposed to certain food processing techniques …
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Synthesis And Characterization Of Metal Complexes Containing Tetrazolate, Poly(tetrazolyl)borate, And Poly(azolyl)aluminate Ligands As High Energy Density Materials
… may serve as secondary energetic materials or colorants in pyrotechnics. The poly(tetrazolyl)borate complexes are insensitive to the flame test, with the exception of the lithium hydrotris(tetrazolyl)borate, which explodes upon exposure to a flame.</p>
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Encapsulation, Color Stability, and Distribution of Anthocyanins from Purple Corn (Zea mays L.), Blueberry (Vaccinium sp.), and Red Radish (Raphanus sativus) in a Cold-Setting Pectin-Alginate Gel.
… There use as a natural alternative to synthetic colorants has been investigated extensively in the past several years as consumers have been asking for greater choice in the marketplace. Their limited stability in food applications several limits their widespread adoption. Meanwhile, other …
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Strategies to increase production of betalain pigments and their use as SynBio tools
… They are currently being used as natural food colorants, and intermediates of the biosynthetic pathway exhibit important pharmacological properties (e.g. ʟ-DOPA). Due to this, there is an increasing interest in improving existing plant sources and obtaining new bio-industrial methods for …
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Evaluation and modification of processing techniques for recovery of anthocyanins from colored corn
… industry commonly uses artificial food colorants derived from petroleum or coal, called coal tar dyes. These dyes may cause attention-deficit/hyperactivity disorder, genotoxicity, neurotoxicity and/or carcinogenicity. In an era of “natural ingredients”, there is increasing customer …
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