scholarly journals APPLYING BI–FUNCTIONAL DYEING AND UV PROTECTION ON PROTEIN TEXTILE MATERIALS WITH WASTE FROM USED TEABAGS AND MANGOSTEEN HULLS

2018 ◽  
Vol 55 (1B) ◽  
pp. 91
Author(s):  
Bui Mai Huong
Keyword(s):  
Uv Protection ◽  
Natural Dyes ◽  
Optimal Conditions ◽  
Citric Acid Solution ◽  
Textile Materials ◽  
Protein Fibers ◽  
Wool Dyeing ◽  
Silk Dyeing ◽  
Mordant Dyeing ◽  
Temperature Time

This paper presents the connection among three factors of the eco–friendly approach and products: natural textile materials, natural dyes and utilization of waste. The silk and wool materials were chosen as they are both protein fibers that have natural dyes affinity. The dyes were extracted from wastes (mangosteen hulls and used tea–bags) with optimal conditions found during our experiments: 80 °C for 120 min with a 15 % w/v citric acid solution in a 1:10 ratio of mangosteen flakes to solvent and 100 °C for 60 min in a 1:20 ratio of spent tea powder to solvent. The silk dyeing and wool dyeing were carried out at separately proper temperature, time and concentrations. The effect on dyeing of mordant types with different salt–metals mordanting methods and mordant techniques – pre–mordanting, simultaneous mordanting and post–mordanting were undertaken. The K/S values were used for determining the fixation of dyes on textile materials as it reflects the surface luster shade of the dyeing products. The results helped to estimate the influence of dyeing processes on protein materials where low temperature (< 90 °C) and post–mordanting methods exhibited good effects. The UPF values above 29 measured on dye fabric proved the excellent UV protection, even with non–mordant dyeing.

scholarly journals Intensification of the extraction process of phenolic compounds from Acorus calamus leaves

2021 ◽  
pp. 4-10
Author(s):  
Oleksiy Andryushayev ◽  
Olena Ruban ◽  
Yuliia Maslii ◽  
Inna Rusak
Keyword(s):  
Phenolic Compounds ◽  
Raw Materials ◽  
Extraction Process ◽  
Raw Material ◽  
Acorus Calamus ◽  
Optimal Conditions ◽  
Ultrasonic Action ◽  
Different Temperatures ◽  
Method Of Extraction ◽  
Temperature Time

The aim. To determine the intensified method of extraction of phenolic compounds from Acorus calamus leaves and optimal conditions for the process. Materials and methods. In order to develop the optimal intensified method of extraction samples were prepared in different conditions of raw materials-extractant ratio, temperature, time and multiplicity. As a raw materials spectrophotometrically pre-standardized Acorus calamus leaves were used. The extraction was carried out in a hermetically sealed ultrasonic extraction reactor PEX 1 (REUS, Contes, France). As the criteria of extraction efficiency were indicators of dry residue and total amount of flavonoids determined using methods described in State Pharmacopoeia of Ukraine. The amount of flavonoids was determined spectrophotometrically on a certified device Specord 200 (Analytik Jena, Germany). Results. According to our research results it was found that ultrasonic action and addition of surfactant significantly improves the efficiency of the extraction process. The optimal conditions for the process were determined. Experimentally proved that the rational raw material-extractant ratio is 1:15. Comparative study of the extraction process with different temperatures showed that the highest amount of extractives is achieved at temperature 70 °C and 45 min of duration. The optimal extraction multiplicity is 3. Conclusions. As a result of the study, the intensified extraction method for Acorus calamus leaves – re-maceration with ultrasound – was established. The conducted researches allowed to develop the method of extraction, expedient in the conditions of the modern pharmaceutical industry.

scholarly journals OPTIMIZING THE PROCESS OF TRANSFORMING COFFEE HUSKS INTO BIOCHAR BY MEANS OF HYDROTHERMAL CARBONIZATION

2018 ◽  
Vol 54 (4B) ◽  
pp. 138
Author(s):  
Tran Thi Hien
Keyword(s):  
Maximum Yield ◽  
Hydrothermal Carbonization ◽  
Optimal Conditions ◽  
Coffee Husk ◽  
Optimal Value ◽  
Face Centered ◽  
Composite Face ◽  
Temperature Time ◽  
Central Composite ◽  
Water Ratio

The conditions of the hydrothermal carbonization process to produce biochar from coffee husk will be optimized for maximum yield. Besides, response surface methodology (RSM) and central composite face-centered (CCF) method will be used in designing experiments. Also, the optimal value of factors such as temperature, time and biomass: water ratio which can provide a maximum yield of biochar will be worked out using Modde 5.0. As a result, the optimal conditions for maximum yield of biochar was obtained as temperature of 180 oC, 3.5 h and biomass: water ratio of 15 %. It can also be concluded that temperature has greater impact on the transformation of biochar than time and biomass: water ratio.

Dyeing silk and cotton fabrics using Fuji apple peel and the properties of the dyed fabrics

2021 ◽  
pp. 004051752110086
Author(s):  
Akemi Yasukawa ◽  
Momoko Fukuyama ◽  
Kunihisa Iwai
Keyword(s):  
Color Change ◽  
Cotton Fabrics ◽  
Natural Dyes ◽  
Color Strength ◽  
Solution Ph ◽  
Silk Fibers ◽  
Apple Peel ◽  
Fuji Apple ◽  
Dyed Fabrics ◽  
Mordant Dyeing

A new source of natural dyes, which possessed antibacterial and UV protection properties, was proposed. Natural dyes were extracted from Fuji apple peel. The extract contained two anthocyanins and five quercetin glycosides. Silk and cotton fabrics were dyed using the extract with and without six types of mordants: Mg2+, Ca2+, Al3+, Ti4+, Fe3+, and Cu2+. The properties of the dyed fabrics were investigated by various means. The K/S values were used to show relative color strength of the dyed fabrics and the CIELAB color system was used to show the color hue of the dyed fabrics. The crystallinity of the silk was lower than that of the cotton. The silk was dyed deeper than the cotton regardless of the dyeing conditions, including dyeing temperature, dyeing period, and solution pH. This result comes from the existence of carboxyl and amino groups and low crystallinity of silk fibers. Fabrics with various colors, including pink, green, brown, and gray, were obtained by mordant dyeing. The dyed fabrics had splendid performance; that is, antibacterial and UV shielding properties. Color fastness to washing (color change) was comparably low but was enhanced with Ti4+ and Fe3+ mordants.

The Influence on Movement Comfort of Fabrics through Functional Finishing of Natural Dyes

2013 ◽  
Vol 680 ◽  
pp. 586-590
Author(s):  
Ting Juan Yi ◽  
Wen Li Wang ◽  
Guo Hua Chen ◽  
Yu Jun Zhou
Keyword(s):  
Research Work ◽  
Uv Protection ◽  
Natural Dyes ◽  
Silk Fabrics

This research work involves the dyeing of silk fabrics with cochineal inset, Safflower yellow, gardenia blue, three kinds of natural dyes. Then, UV protection performance was analyzed. The results show that the fashion color that turquosice has been acquired through changing the proportion of each natural dyestuff in combination dyeing, simultaneously there will be a certain influence on the movement comfort performance.

scholarly journals TRADITIONAL METHODS OF PRODUCING NATURAL DYES AND WOOL DYEING AMONG THE INGUSH IN THE 19TH - EARLY 20TH CENTURIES

2022 ◽  
pp. 139-148
Author(s):  
Хава Магомедовна Акиева
Keyword(s):  
Twentieth Century ◽  
Natural Dyes ◽  
The Other ◽  
Gradual Transition ◽  
North Caucasus ◽  
Traditional Methods ◽  
The North ◽  
Wool Dyeing ◽  
The One ◽  
Handicraft Production

В статье рассматриваются традиционные способы производства природных красителей, раскрываются особенности технологии правильного крашения с применением натуральных ингредиентов. Антропология цвета в культуре ингушей базировалась на двухуровневой основе: с одной стороны, она была связана с естественно-средовыми условиями окружения, с другой - формировалась под влиянием исторической практики и жизнедеятельности народа. Рассматриваются технологические издержки, которые возникают при производстве натуральных красителей в домашних условиях. Отмечается, что к началу ХХ в. на территории Северного Кавказа происходит постепенный переход от применения натуральных красителей к более дешевым и менее трудоемким фабричным аналогам. Автором представлен систематизированный перечень местных красильных растений и деревьев, дается информация о красильных свойствах минералов и технологии их использования в кустарном производстве ингушей в XIX-XX вв. в процессе крашения шерсти. На основе проведенного анализа делается вывод о том, что в современных условиях происходит утрата традиционного опыта производства натуральных красителей и крашения шерсти у ингушей. The paper discusses traditional methods for the production of natural dyes, the features of the technology of correct dyeing. The anthropology of color in the culture of the Ingush was based on a two-level basis: on the one hand, it was associated with the natural environmental conditions, and on the other hand, it was formed under the influence of historical practice and life. The technological costs that arise in the production of natural dyes at home are considered. The research shows that by the beginning of the twentieth century in the North Caucasus there is a gradual transition from the use of natural dyes to cheaper and less laborious factory analogues. The author presents a systematized list of local dyeing plants and trees, provides information on the dyeing properties of minerals and the technology of their use in the handicraft production of the Ingush in the 19th - 20th centuries in the process of dyeing wool. Based on the analysis, the author concludes that in modern conditions there is a loss of traditional experience in the production of natural dyes and wool dyeing among the Ingush.

scholarly journals Photoactive cotton fabric for UV protection and self-cleaning

RSC Advances ◽  
2019 ◽  
Vol 9 (32) ◽  
pp. 18106-18114 ◽  
Author(s):  
Ishaq Ahmad ◽  
Chi-wai Kan ◽  
Zhongping Yao
Keyword(s):  
Cotton Fabric ◽  
Uv Protection ◽  
Nano Materials ◽  
Textile Materials ◽  
Self Cleaning

Development of textile materials with tailored properties by coating with nano-materials is an emerging field of research.

scholarly journals UV-protection property of Eri silk fabric dyed with natural dyes for eco-friendly textiles

2020 ◽  
Vol 773 ◽  
pp. 012027 ◽  
Author(s):  
N Rungruangkitkrai ◽  
R Mongkholrattanasit ◽  
P Phoophat ◽  
N Chartvivatpornchai ◽  
S Sirimungkararat ◽  
...  
Keyword(s):  
Uv Protection ◽  
Natural Dyes ◽  
Silk Fabric ◽  
Protection Property ◽  
Eri Silk

Optimization of the Antimicrobial Effects of Surfactin against Bacillus cereus Spores

2020 ◽  
Vol 83 (11) ◽  
pp. 1983-1988
Author(s):  
XIANQING HUANG ◽  
LIANJUN SONG ◽  
MINGWU QIAO ◽  
PINGAN ZHANG ◽  
QIUYAN ZHAO
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bacillus Cereus ◽  
Control Sample ◽  
Outer Wall ◽  
Experimental Results ◽  
Optimal Conditions ◽  
Design Expert ◽  
Temperature Time ◽  
Scanning Electron

ABSTRACT The purpose of this study was to establish a three-variable bactericidal model of temperature, time, and concentration to determine the optimal conditions for Bacillus cereus spore inactivation by surfactin. To obtain the binary regression equation of the inactivated spore model, a total of 17 simulations were performed using response surface methodology. The experimental results showed that the three factors each had a discernible but nonequal impact on the inactivation response value. Multiple regression analysis of experimental results using Design-Expert software yielded the following equation: Y = 1.47 + 0.39ξ1(temperature) + 0.38ξ2(time) + 0.39ξ3(concentration) − 0.20ξ1ξ2 + 0.22ξ1ξ2 − 0.12ξ2ξ3 − 0.23ξ12 − 0.11ξ22 − 0.40ξ32. Optimal inactivation of spores was achieved by treatment with surfactin at a concentration of 4 mg/mL for 40 h at 53°C, with the response value reaching 1.8. The spores were treated with surfactin under these conditions; the microstructural changes of spores were observed by use of scanning electron microscopy. We found that the structures of the outer wall of the spores were damaged, whereas the spores in the control sample showed no visible damage. HIGHLIGHTS

Exceptional wearability of multifunctional TiO2-coated hybrid silk fabric with controllable ultraviolet-protection properties

2017 ◽  
Vol 88 (24) ◽  
pp. 2757-2765 ◽  
Author(s):  
Fengxiang Chen ◽  
Huiyu Yang ◽  
Ke Li ◽  
Xin Liu ◽  
Bo Deng ◽  
...  
Keyword(s):  
Atomic Layer ◽  
Air Permeability ◽  
Uv Protection ◽  
Silk Fabric ◽  
Textile Materials ◽  
Layer Deposition ◽  
Negative Effect ◽  
Ultraviolet Protection ◽  
Recovery Angle ◽  
Significant Attention

Ultraviolet (UV)-protective textiles have attracted significant attention because of their wide applicability. However, the anti-UV coatings of such textiles have an adverse effect on their wearing comfort, and other properties related to luster, softness and handle were also ignored. In this study, TiO2-coated silk fabric with controllable UV-protection properties was successfully fabricated via atomic layer deposition (ALD). The luster, bending properties, crease recovery, mechanical properties, air permeability and anti-UV properties of the TiO2-coated silk fabric were investigated. The results showed that the thickness, whiteness, bendability, tensile strength and anti-UV properties of the silk fabric increased progressively while its air permeability, wet crease recovery angle and dry crease recovery angle decreased with an increase in the thickness of the TiO2 coating. However, the coating did not have a negative effect on the usability of the fabric. Thus, the proposed ALD method is a promising one for modifying the surfaces of elastic textile materials in order to accord them with UV-protection properties.

scholarly journals Translocation of acyl-CoA oxidase into peroxisomes requires ATP hydrolysis but not a membrane potential.

1987 ◽  
Vol 105 (6) ◽  
pp. 2915-2922 ◽  
Author(s):  
T Imanaka ◽  
G M Small ◽  
P B Lazarow
Keyword(s):  
Membrane Potential ◽  
Atp Hydrolysis ◽  
Proteinase K ◽  
Optimal Conditions ◽  
Efficient System ◽  
Acyl Coa Oxidase ◽  
Hydrolysis Of ◽  
Temperature Time ◽  
Liver Peroxisomes

An efficient system for the import of newly synthesized proteins into highly purified rat liver peroxisomes was reconstituted in vitro. 35S-Labeled acyl-CoA oxidase (AOx) was incorporated into peroxisomes in a proteinase K-resistant fashion. This import was specific (did not occur with mitochondria) and was dependent on temperature, time, and peroxisome concentration. Under optimal conditions approximately 30% of [35S]AOx became proteinase resistant. The import of AOx into peroxisomes could be dissociated into two steps: (a) binding occurred at 0 degrees C in the absence of ATP; (b) translocation occurred only at 26 degrees C and required the hydrolysis of ATP. GTP would not substitute for ATP and translocation was not inhibited by carbonylcyanide-m-chlorophenylhydrazone, valinomycin, or other ionophores.

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