Characterization of the pigment in naturally yellow-colored domestic silk

Ma, Ming; Hussain, Munir; Dong, Suozhuai; Zhou, Wenlong

doi:10.1016/j.dyepig.2015.08.003

Cited by 27 publications

(14 citation statements)

References 25 publications

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“…For the color measurement of silkworm powder, L* and b* values were significantly (p < 0.05) decreased when the drying temperature increased. The color fading in the silkworm powder may have been due to the sensitivity of the silkworm color pigment to high temperature [42]. In addition, Dorouzi et al [43] reported the formation of browning pigments by the non-enzymatic browning or Maillard reactions at high drying temperature, leading to a decrease in lightness.…”

Section: Effect Of Drying Temperaturementioning

confidence: 99%

Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Anuduang

Loo

Jomduang

et al. 2020

Foods

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The mulberry silkworm (Bombyx mori L.) is a common edible insect in many countries. However, the impact of thermal processing, especially regarding Thai silkworm powder, is poorly known. We, therefore, determined the optimum time for treatment in hot water and subsequent drying temperatures in the production of silkworm powder. The silkworms exposed to 90 °C water for 0, 5, 10, 15, and 20 min showed values of Total Phenolic Compounds (TPCs), 2,2-Diphenyl-1-picrylhydrazyl free radical scavenging (DPPH) assay, 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay, and Ferric Reducing Antioxidant Power (FRAP) assay that were significantly (p < 0.05) higher at the 5 min exposure time compared with the other times. The reduction of microorganisms based on log CFU/g counts was ≥3 log CFU/g (99%) at the 5 min treatment. To determine the optimum drying temperature, the silkworms exposed to 90 °C water for 5 min were subjected to a hot-air dryer at 80, 100, 120, and 140 °C. The TPC value was the highest (p < 0.05) at 80 °C. The silkworm powder possessed significantly (p < 0.05) higher DPPH, ABTS radical scavenging ability, and ferric ion reducing capability (FRAP assay) at 80 °C compared with other drying temperatures. This study indicates that shorter exposure times to hot water and a low drying temperature preserve the antioxidant activities. High antioxidant activities (in addition to its known protein and fat content) suggest that silkworms and silkworm powder can make a valuable contribution to human health.

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Section: Effect Of Drying Temperaturementioning

confidence: 99%

Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Anuduang

Loo

Jomduang

et al. 2020

Foods

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“…Naturally colored silk (NCS) is referred as a domestic silk variety with natural color and is the product of the color mutant of conventional silkworm Bombyx mori. NCS needs not to be dyed and exhibits properties and productivity close to the conventional white silk [1,2], thus causing considerable attention due to its economic and environmental benefits. However, utilization of NCS is currently limited due to the presence of the hydrophobic pigment substances in the sericin layer rather than in the silk fibroin [1].…”

Section: Introductionmentioning

confidence: 99%

“…NCS needs not to be dyed and exhibits properties and productivity close to the conventional white silk [1,2], thus causing considerable attention due to its economic and environmental benefits. However, utilization of NCS is currently limited due to the presence of the hydrophobic pigment substances in the sericin layer rather than in the silk fibroin [1]. Wet processing, such as degumming and repeated washing, can result in a significant loss of the pigment, which is accompanied by the dissolution of sericin [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…However, utilization of NCS is currently limited due to the presence of the hydrophobic pigment substances in the sericin layer rather than in the silk fibroin [1]. Wet processing, such as degumming and repeated washing, can result in a significant loss of the pigment, which is accompanied by the dissolution of sericin [1,2]. It is reported that the color of NCS fabrics suffers considerable change when washing them for more than 5 cycles [3].…”

Section: Introductionmentioning

confidence: 99%

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Improving the Color Stability of Naturally Colored Silk by Cross-Linking the Sericin with Phytic Acid

Ayaz

Jin

et al. 2019

International Journal of Polymer Science

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The color of naturally colored silk (NCS) fades easily during home washing due to the loss of pigment accompanied by dissolution of the sericin. In this study, phytic acid was used to cross-link the sericin of NCS and reduce its solubility, aiming at improving the color fastness of NCS to repeated washing. It was found that the sericin-fixing effect increased as the concentration of phytic acid to 1.0 wt% and the cross-linking time to 5 h increased and then reached a constant level. Cross-linking at pH 7.0-8.5 and temperature 30-40°C could obtain relatively good sericin-fixing effects. The cross-linked NCS showed low sericin loss during the degumming and had much better color fastness to repeated washing as compared with the samples before cross-linking. The cross-linking method proposed in this study may be not only a kind of solution for improving the color fastness of NCS with high practicality but also an alternative for cross-linking sericin-based materials in the biomedical field.

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“…The biological activities of the sericin mixture are a result of the presence of sericin proteins or a combined effect of the non-sericin components. The natural coloring of a silk cocoon occurs on the surface of the sericin layer, which is dependent upon the strain of the B. mori silkworm [ 3 ]. The cocoons can appear in a range of colors including yellow, pink, golden-yellow, flesh, sasa (yellowish-green), and green.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Human Serum Albumin Particles Loaded with Non-Sericin Extract Obtained from Silk Cocoon as a Carrier System for Hydrophobic Substances

et al. 2021

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Non-sericin (NS) extract was produced from the ethanolic extract of Bombyx mori silk cocoons. This extract is composed of both carotenoids and flavonoids. Many of these compounds are composed of substances of poor aqueous solubility. Thus, this study focused on the development of a carrier system created from biocompatible and biodegradable materials to improve the biological activity of NS extracts. Accordingly, NS was incorporated into human serum albumin template particles with MnCO3 (NS-HSA MPs) by loading NS into the preformed HAS-MnCO3 microparticles using the coprecipitation crosslinking dissolution technique (CCD-technique). After crosslinking and template dissolution steps, the NS loaded HSA particles are negatively charged, have a size ranging from 0.8 to 0.9 µm, and are peanut shaped. The degree of encapsulation efficiency ranged from 7% to 57% depending on the initial NS concentration and the steps of adsorption. In addition, NS-HSA MPs were taken up by human lung adenocarcinoma (A549 cell) for 24 h. The promotion of cellular uptake was evaluated by flow cytometry and the results produced 99% fluorescent stained cells. Moreover, the results from CLSM and 3D fluorescence imaging confirmed particle localization in the cells. Interestingly, NS-HSA MPs could not induce inflammation through nitric oxide production from macrophage RAW264.7 cells. This is the first study involving the loading of non-sericin extracts into HSA MPs by CCD technique to enhance the bioavailability and biological effects of NS. Therefore, HSA MPs could be utilized as a carrier system for hydrophobic substances targeting cells with albumin receptors.

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Characterization of the pigment in naturally yellow-colored domestic silk

Cited by 27 publications

References 25 publications

Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Effect of Thermal Processing on Physico-Chemical and Antioxidant Properties in Mulberry Silkworm (Bombyx mori L.) Powder

Improving the Color Stability of Naturally Colored Silk by Cross-Linking the Sericin with Phytic Acid

Fabrication and Characterization of Human Serum Albumin Particles Loaded with Non-Sericin Extract Obtained from Silk Cocoon as a Carrier System for Hydrophobic Substances

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