Natural coloration of wood material by red beetroot (Beta vulgaris) and determination color stability under UV exposure

The aims of this research were to determine the concentration of beetroot juice in jelly which panelists like best; to determine the color degradation rate constant in jelly colored with beetroot juice caused by sunlight and fluorescent light; and color degradation rate constant of jelly colored with synthetic colorant.The organoleptic test used 2,5 percent; 5 percent; 7,5 percent; 10 percent; and 12,5 percent beetroot juice and permitted synthetic colorant for food. The light intensity to test the beetroot color stability in jelly were 879,06 lux, 1.688,54 lux, 2.342,2 lux and 6.752,2 lux.The results showed that the concentration of beetroot juice which panelists like best was 5 percent.; The color degradation rate constant of jelly colored by 5 percent beetroot juice on intensity 879,06 lux was 0,0468 hour-1; 1.688,54 lux was 0,0565 hour-1; 2.342,2 lux was 0,0653 hour-1; 6.752,2 lux was 0,0887 hour-1. The higher the light intensity, the higher the degradation constant rate.

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Formulation of Blush Preparations by Using Natural Coloring from Red Beetroot Extract (Beta vulgaris L.)

Indonesian Journal of Chemistry ◽

10.22146/ijc.60414 ◽

2021 ◽

Vol 21 (4) ◽

pp. 860

Author(s):

Suci Wulan Sari ◽

Ratna Djamil ◽

Faizatun Faizatun

Keyword(s):

Beta Vulgaris ◽

Food Additives ◽

Color Stability ◽

Initial Result ◽

Stability Test ◽

Phytochemical Screening ◽

Dry Extract ◽

Compact Powder ◽

Loose Powder ◽

Freeze Dryer

Beetroot (Beta vulgaris L.) has compounds that can be used for body health, beauty skincare, food additives, and much more. This research was aimed to prepare the dry extract of beetroot and formulate it into a loose powder, compact powder, and cream. The preparation was started by adding 2, 4, or 6% of dry extract, then blending the pulp and drying the resultant residue using a freeze dryer. Testing on color homogeneity, polishing, breakage, pH stability, color stability, and the hedonic test was carried out to determine the product quality. The initial result of phytochemical screening showed it might contain flavonoids, alkaloids, saponins, tannins, triterpenoids, steroids, and quinones. The color stability test performed at 30 °C showed that the cream was unstable while other forms showed fair stability at 8 °C. All dosage forms were homogeneous and could be applied easily. The breakage test showed no fractures. The pH remained stable for all formulas (between 3–5) after 28 days of storage. The color stability test showed that the significant discoloration only happened to the loose powder and cream. The hedonic test showed that the compact powder with a concentration of 6% was the most preferred formula by users.

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UV Exposure May Be Tied to Dermatomyositis in Women

Skin & Allergy News ◽

10.1016/s0037-6337(09)70476-0 ◽

2009 ◽

Vol 40 (10) ◽

pp. 6

Author(s):

JEFF EVANS

Keyword(s):

Uv Exposure

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UV Exposure and Gender Unrelated To Rosacea Risk

Skin & Allergy News ◽

10.1016/s0037-6337(07)70760-x ◽

2007 ◽

Vol 38 (10) ◽

pp. 1-8

Author(s):

BRUCE JANCIN

Keyword(s):

Uv Exposure ◽

And Gender

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Morphological changes in exterior surface coatings after exposure to cyclic water submersion and UV exposure

10.1021/scimeetings.0c04264 ◽

2020 ◽

Author(s):

William J Rosano

Keyword(s):

Morphological Changes ◽

Surface Coatings ◽

Uv Exposure ◽

Exterior Surface

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Sorbitol enhances the physicochemical stability of B12 vitamers

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000578 ◽

2020 ◽

Vol 90 (5-6) ◽

pp. 439-447 ◽

Cited By ~ 1

Author(s):

Andrew Hadinata Lie ◽

Maria V Chandra-Hioe ◽

Jayashree Arcot

Keyword(s):

Ascorbic Acid ◽

Uv Light ◽

Heat Exposure ◽

Water Soluble ◽

Uv Exposure ◽

Physicochemical Stability ◽

Before And After ◽

The Stability

Abstract. The stability of B12 vitamers is affected by interaction with other water-soluble vitamins, UV light, heat, and pH. This study compared the degradation losses in cyanocobalamin, hydroxocobalamin and methylcobalamin due to the physicochemical exposure before and after the addition of sorbitol. The degradation losses of cyanocobalamin in the presence of increasing concentrations of thiamin and niacin ranged between 6%-13% and added sorbitol significantly prevented the loss of cyanocobalamin (p<0.05). Hydroxocobalamin and methylcobalamin exhibited degradation losses ranging from 24%–26% and 48%–76%, respectively; added sorbitol significantly minimised the loss to 10% and 20%, respectively (p < 0.05). Methylcobalamin was the most susceptible to degradation when co-existing with ascorbic acid, followed by hydroxocobalamin and cyanocobalamin. The presence of ascorbic acid caused the greatest degradation loss in methylcobalamin (70%-76%), which was minimised to 16% with added sorbitol (p < 0.05). Heat exposure (100 °C, 60 minutes) caused a greater loss of cyanocobalamin (38%) than UV exposure (4%). However, degradation losses in hydroxocobalamin and methylcobalamin due to UV and heat exposures were comparable (>30%). At pH 3, methylcobalamin was the most unstable showing 79% degradation loss, which was down to 12% after sorbitol was added (p < 0.05). The losses of cyanocobalamin at pH 3 and pH 9 (~15%) were prevented by adding sorbitol. Addition of sorbitol to hydroxocobalamin at pH 3 and pH 9 reduced the loss by only 6%. The results showed that cyanocobalamin was the most stable, followed by hydroxocobalamin and methylcobalamin. Added sorbitol was sufficient to significantly enhance the stability of cobalamins against degradative agents and conditions.

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