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Journal articles on the topic 'Dye colour absorbency'
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1
Yam, L. Y., L. L. Lau, C. W. Kan, et al. "The Influence of Fibre Content of Knitted Fabric on the Ultraviolet Radiation Protection Property." Advanced Materials Research 550-553 (July 2012): 3241–44. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.3241.
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In this study, sulphur dye was used for dyeing 100% cotton knitted fabric and the effect of dye concentration and colour shade on ultraviolet protection factor (UPF) was discussed. The results indicated that the UVR absorbency of sulphur dye was not satisfactory. Generally speaking, the higher the dye concentration, the darker the shade of fabric. Nevertheless, it did not affect the UPF of fabric if the absorbency of the selected dye was ineffective.
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Au, C. H., O. Y. Shum, C. W. Kan, et al. "The Impact of Dyed Knitted Fabric on the Ultraviolet Radiation Protection Propery." Advanced Materials Research 550-553 (July 2012): 3245–48. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.3245.
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In this study, sulphur dye was used for dyeing 100% cotton knitted fabric and the effect of dye concentration and colour shade on ultraviolet protection factor (UPF) was discussed. The results indicated that the UVR absorbency of sulphur dye was not satisfactory. Generally speaking, the higher the dye concentration, the darker the shade of fabric. Nevertheless, it did not affect the UPF of fabric if the absorbency of the selected dye was ineffective.
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Borisova, Anna, and Skaidrīte Reihmane. "A Study of Absorption Properties Improvement of Cotton Blended Fabric." Key Engineering Materials 559 (June 2013): 13–18. http://dx.doi.org/10.4028/www.scientific.net/kem.559.13.
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Successful results of textile materials finishing process in order to gain desired properties to the fabric according to customers’ demands mainly depend on properly-carried pre-treatment stages. The present study covers twill weave cotton/polyester fabric’s modification in alkaline medium at different temperatures and treatment durations through exhaustion (hot and cold treatment) and pad-steam process. An influence of the reduction agent addition was ascertained. Weight loss, water absorbency, vertical wicking, dye uptake, colour measurements, surface morphology and psysicomechanical characteristics were determined. Samples and recommendations of optimal alkaline treatment technologies are developed.
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Ganguly, Debojyoti, Chanchal Mondal, and Asim Kumar Roy Choudhury. "Part 1." Research Journal of Textile and Apparel 21, no. 3 (2017): 219–38. http://dx.doi.org/10.1108/rjta-05-2017-0016.
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Purpose In recent times, wool- and silk-blended fabrics are popular for creating glamourous products. Silk is blended to wool for creating more lustrous effect and to impart strength; on the other hand, wool is responsible for resilience, softness and warmth properties. Chemically both the fibres are protein-based, but the amount of amino acids is different. Due to this, the dye absorption behaviours of the two fibres from the same dye-bath are different. Wool is become darker than the silk fibre, if both the fibres are dyed together in a single bath dyeing process. Design/methodology/approach Here the wool fibres are first pre-treated with a commercial synthetic tanning agent (syntan) Mesitol HWS at three different pH values of 2.2, 3.2 and 4.2 and at three different concentrations: 5, 10 and 15 per cent. Then the syntan pre-treated wool fibres are dyed together with silk fibres maintaining the blend ratio as 80:20 by Telon Red MR, Telon Yellow M4GL and Telon Blue MRLW with sodium sulphate at three different concentrations of 10, 20 and 30 per cent. Findings The dye absorbency of the syntan-treated wool fibres decreased with increase in syntan concentration, whereas the colour strength of silk fibres increased. The resist effectiveness of wool fibres is increased from 6 to 59 per cent with increase of syntan concentration. So after the dyeing process, the colour strength of syntan-treated wool fibres are almost same with the colour strength of silk fibres. The washing fastness of the samples is improved, and wash fastness behaviour of both wool and silk fibres is almost same. Originality/value This paper gives an idea about the one bath dyeing process of wool- and silk-blended fabrics to achieve solid dyeing effect.
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Thana Singam, Rupashinii A/P, Noraini Bt Marsi, Azrin Hani Bt Abdul Rashid, et al. "A Review on Characteristics and Potential Applications of Henna Leaves (Lawsonia inermis)." Journal of Computational and Theoretical Nanoscience 17, no. 2 (2020): 603–12. http://dx.doi.org/10.1166/jctn.2020.8741.
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This review paper reports the studies available on the characteristics and applications of the henna (Lawsonia inermis) as a natural dye. Textile materials are mainly from synthetic dyes and fibers which are not renewable and not biodegradable. Around 30 million of tonnes was estimated for the global consumption of textiles and was expected to grow up to 3% per annum while 70,000 tonnes of dyes were released to the environment. The population of people who will have allergic to the chemicals will grow up to 60% by year 2020 which was stated in business week. Apart from that, natural dyes can be extracted and process from various sources such as plants, leaves, minerals, roots, barks and insect sections. Plants that was found in the world approximately 20% were for the pharmaceutical or biological test and new antibiotics were introduced in the market are obtain from natural or semi-synthetic resources. For the biological test, henna oil was tested against Staphylococcus aureus which was 870 μg/mL and Neisseria gonorrhoeae was 87 μg/mL respectively while henna leaves extraction using methanol of 95% showed significant in-vitro antihyperglycemic effect. Chemical contains in the henna are carbohydrates as 33.62%, fibers as 33.5%, fatty oils as 10–11% and essential oil as 0.01–0.02%. Moreover, the good UV absorbency for the henna dyed cotton was at 900 °C for 60 minutes and the colour fastness for the fabric which was dyed with henna is 4 which is good. Henna dye has slightly negative charge for the higher pH 9 for the washing fastness. The optimize condition for the pre-mordant is 4% for the copper sulphate (CuSO4) for cotton with the extraction of henna leaves. Furthermore, the optimum condition for the henna to remove lead Pb (II) from wastewater are pH 6, contact time is 80 minutes, 10 ppm for the initial metal concentration and 0.75 g/L for adsorbent dosage.
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Zambrano, Judith, Sagrario Briceño, Clara Mendez, and Eliseo Castellano. "Response of Mango Fruit to Potassium Permanganate as an Ethylene Absorbent during Storage." HortScience 31, no. 4 (1996): 638c—638. http://dx.doi.org/10.21273/hortsci.31.4.638c.
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Mango fruit of `Palmer' and `Keitt' were harvested at the preclimacteric stage. An inexpensive ethylene absorbent was made by mixing aqueous KMnO4 with vermiculite and silicagel as support material. Fruits were treated with the mixture of vermiculite–KMnO4 and silicagel–KMnO4 as ethylene absorbents and stored at 10 and 15°C for 18 days. Fruits were evaluated for skin and pulp color, total soluble solids, titratable acidity and weight loss at interval of 3 days. Ethylene absorbents had no significant effect on skin color parameters (lightness, hue, and chroma). However differences due to ethylene absorbents and temperature storage were evident on pulp color parameters. Soluble solids content and titratable acidity were affected by ethylene absorbent and temperature storage. The percent of weight loss increased with temperature and with duration of storage.
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Knolle, Erich, Wolfgang Linert, and Hermann Gilly. "Using Amsorb to Detect Dehydration of CO2Absorbents Containing Strong Base." Anesthesiology 97, no. 2 (2002): 454–59. http://dx.doi.org/10.1097/00000542-200208000-00024.
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Background Because Amsorb changes color when it dries, the authors investigated whether Amsorb combined with different strong base-containing carbon dioxide absorbents signals dehydration of such absorbents. Methods Five different carbon dioxide absorbents (1,330 g) each topped with 70 g of Amsorb were dried in an anesthesia machine (Modulus CD, Datex-Ohmeda, Madison, WI) with oxygen (Amsorb layer at the fresh gas inflow site). As soon as a color change was detected in the Amsorb, the authors tested the samples for a change in weight and carbon monoxide formation from 7.5% desflurane or 4% isoflurane. In a different experiment with the five absorbents, Amsorb was layered at the drying gas outflow site. In further experiments, the authors tested for a color change in Amsorb from drying and rehydrating and from drying with nitrogen. Finally, they dried a mixture of Amsorb and 1% NaOH and examined it for color change. Results In the experiments with Amsorb layered at the inflow, the Amsorb changed color when the water content of the samples was only marginally reduced (to a mean 13.6%), and no carbon monoxide formed. With Amsorb layered at the outflow, it changed color when the mean water content of the samples was reduced to 8.8%, and carbon monoxide formation was detected to varying degrees. The color change was independent of the drying gas and could be reversed by rehydrating. Adding NaOH to Amsorb prevented a color change. Conclusions Dehydration in strong base-containing absorbents can reliably be indicated before carbon monoxide is formed when Amsorb is layered at the fresh gas inflow. The authors assume that the indicator dye in Amsorb changes color on drying because of the absence of strong base in this absorbent.
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Mohammed, Noor A., Abeer I. Alwared, and Mohammed S. Salman. "Photocatalytic Degradation of Reactive Yellow Dye in Wastewater using H2O2/TiO2/UV Technique." Iraqi Journal of Chemical and Petroleum Engineering 21, no. 1 (2020): 15–21. http://dx.doi.org/10.31699/ijcpe.2020.1.3.
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In the present study, advanced oxidation treatment, the TiO2 /UV/H2O2 process was applied to decolorisation of the reactive yellow dyes in aqueous solution. The UV radiation was carried out with a 6 W low-pressure mercury lamp. The rate of color removal was studied by measuring the absorbency at a characteristic wavelength. The effects of H2O2 dosage, dye initial concentration and pH on decolorisation kinetics in the batch photoreactor were investigated. The highest decolorisation rates were observed (98.8) at pH range between 3 and 7. The optimal levels of H2O2 needed for the process were examined. It appears that high levels of H2O2 could reduce decolorisation by scavenging the *OH. The color degradation rate decreases as the dye concentration increases. The rate coefficient (k=0.0319 min-1) of degradation, follows the pseudo-first-order kinetics.
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Ding, Chun Yan, Lan Wang, Jun Xiong Lin, and Duan Ni. "Application of TEG Replacing Urea in Silk Printing with Reactive Dyes." Advanced Materials Research 175-176 (January 2011): 691–95. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.691.
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In order to resolve the problem of water pollution owing to using a large number of urea in silk printing with reactive dyes, TEG (Triethylene glycol/3, 6-dioxaoctane-1/8-diol) was used to replace the urea. The effects of TEG on the performance of monochromic and combination printed fabrics were studied through testing K/S values (color depth) and Delta E (color differences) of printed fabrics. Meanwhile, the effect of TEG and urea on the solubility of reactive dye and the moisture absorbency of silk fabric were compared by testing the solubility of reactive dyes and the diameter of silk fiber respectively. The results indicated that the best replacement ratio of TEG to urea was 75%.
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Li, Jun Ping, Wei Min Zhang, and Jia Ling Pu. "A Photometric Method for Measuring Photoacid Generator Efficiencies Using Rhodamine B as Acid Sensor in Thin Polymer Films." Key Engineering Materials 373-374 (March 2008): 686–89. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.686.
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This paper reported a novel method to measure photoinduced acid generation in polymer films, which were widely used in microlithography. The method employed Rhodamine B (RB) as acid sensor due to its changes in color and uv-vis absorbency in acidic condition. The property of Rhodamine B was examined in hydrochloric and trifluoromethyl sulfonic acids, and the standard working curves in thin polymer film were set up, which indicated the relationship of acid concentration and Rhodamine B’s relative peak absorption ("ABS). In this case, the difference in absorbency could reflect the different amounts of acid generated. According to these standard working curves, we can calculate the efficiency of photoacid generator (PAG). This method has advantage over existing method in measuring the efficiency of photoacid generator in solution, because it eliminated the influence of solvents.
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Zhang, Hui, Xin Li, Baibing Han, Hailiang Wu, and Ningtao Mao. "Simultaneous reactive dyeing and surface modification of polyamide fabric with TiO2 precursor finish using a one-step hydrothermal process." Textile Research Journal 88, no. 22 (2018): 2611–23. http://dx.doi.org/10.1177/0040517517729382.
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In this article, the approach of dyeing polyamide (PA) fabric by using C.I. Reactive Blue 19 dye and simultaneously modifying it with titanium dioxide precursor under hydrothermal conditions is developed. The anthraquinone-based Reactive Blue 19 dye, which is more resistant to biodegradation owing to its fused aromatic structure compared to an azo-based one, is utilized as a model compound in this research to demonstrate the photodegradation effect of TiO2 on reactive dyes. It is shown that a layer of TiO2 nanoparticles is homogeneously coated on fiber surfaces and their particle sizes are smaller than those remaining in the residual dyeing liquors. The crystallinity and optical properties of the resultant PA fabrics are changed due to this hydrothermal dyeing process. In comparison with the dyed-only PA fabrics, the PA fabrics dyed and simultaneously modified with anatase TiO2 nanoparticles exhibit better color fastness against artificial light (xenon) while maintain similar grades of color fastness against washing with soap, wet scrubbing, dry cleaning as well as dry/wet rubbing. While changes in tensile strength, elongation and water absorbency of the resultant PA fabrics were not found, the addition of tetrabutyl titanate in the dyeing liquor is proved to facilitate the reaction of reactive dye with PA fabric and the resultant PA fabric shade. More interestingly, it is noticed that the residual dyeing liquor can be photodegraded after 50 mins of either UV or visible light irradiation, and the dyeing wastewater can thus be released in an eco-friendly manner to the environment.
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Wang, Xueyan, Yuanjun Liu, and Rong Lv. "Preparation of a Kind of Non-Woven Viscose Colour Absorbing Material and Research of its Colour Absorption Properties." Fibres and Textiles in Eastern Europe 27, no. 3(135) (2019): 71–77. http://dx.doi.org/10.5604/01.3001.0013.0745.
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A non-woven viscose material was modified with self-made cationic gelatin protein auxiliary by the padding process. The material prepared was then used as an environmentally friendly colour absorbent for the decolourisation of dye wastewater. The effects of the sodium hydroxide swelling pretreatment process and cationic padding modification process on the colour absorption and decolourisation rate were discussed. Moreover an optimal preparation process for the colour-absorbing material was determined. This was as follows: In order to make the non-woven viscose material swell and improve the subsequent modification effect, first the non-woven viscose material was pretreated with an aqueous solution containing 50 g/l of sodium hydroxide, at room temperature, for 5 min. Then the material was padded in a mixed aqueous solution containing 80 g/l of cationic gelatin and 18 g/l of sodium hydroxide by means of a laboratory padder with two dips and two nips. After treatment, the material was dried and steamed for 4 min. Lastly the material was washed with water and dried. The results show that the colour-absorbing material prepared by this process has the advantages of a high colour absorption rate and high decolourisation percentage. And it could be applied to the decolourisation of printing and dyeing wastewater, or to prevent washed off dyestuff staining on light colour clothes in the process of laundry.
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Ahmed, Osman, and Stephen Mannion. "The Cost Implications of Replacing Soda Lime with Amsorb Plus in Clinical Practice." ISRN Anesthesiology 2011 (November 24, 2011): 1–4. http://dx.doi.org/10.5402/2011/730483.
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Background and Goal of the Study. Desiccated soda lime is known to produce toxic compounds when interacting with volatile anesthetic agents. Amsorb Plus does not produce these but is more expensive per unit weight. Materials and Methods. In a prospective cross-over study, we evaluated the cost of using soda lime (Spherasorb, Intersurgical, UK) and Amsorb Plus. In four operating theatres over two 4-week periods, one for each product, we measured sevoflurane consumption, amount of absorbent used (kg), and amount of waste disposal (kg). Soda lime was changed weekly, and Amsorb Plus once colour change happened. Both were changed if inspired CO2 occurred. Low fresh gas flows were encouraged with Amsorb Plus. Results and Discussion. The total costs over each four-week period were €4375.69 and €3150.94 for soda lime and Amsorb Plus respectively. Reduced cost during Amsorb Plus period (28%) was due to (1) less sevoflurane consumption, (2) fewer Amsorb Plus changes because of reliable colour change, and (3) cheaper domestic waste disposal of Amsorb Plus as it is inert. Conclusion. We demonstrated Amsorb Plus to be a cost-efficient alternative to soda lime in everyday clinical practice.
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Y.M., Issa, Abou-Attia F.M., Abdel-Gawad F.M., and Abdel-Hamid S.M. "Spectrophotometric determination of some pharmaceutical piperazine derivatives by charge-transfer and ion-pair complexation methods." Scientia Pharmaceutica 70, no. 3 (2002): 253–69. http://dx.doi.org/10.3797/scipharm.aut-02-24.
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Simple and sensitive spectropliotometric methods are described for the assay of three piperazine derivatives ketoconazole, trimetazidine hydrochloride and piribedil based on cliarge-transfer and ion-pair complexation reactions. The first method is based on the reaction of the basic drug with iodine as o-acceptor in dry 1,2-dichloroethane to form a yellow colour due to the formation of charge-transfer complex showing maximum absorbence at 363, 364 and 359 nm for ketoconazole, trimetazidine hydrochlorid and piribedil, respectively. The second method is based on the reaction of basic drug with bromocresol green (BCG) in dry 1,2- dichloroethane to form a stable yellow coloured complex with maximum absorbance at 407, 408 and 410 nm for ketoconazol, trimetazidine hydrochloride and piribedil, respectively. Beer's law was obeyed for both methods and the relative standard deviations were found to be less than 1%. The two methods can be applied for the analysis of tablets and cream, with no evidence of interference from excipients. A more detailed investigation of the complex was made with respect to its composition association constant and free energy cliange.
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Janarthanan, M., and M. Senthil Kumar. "A modern development of bioactive wound dressing material using Chaetomorpha linum seaweed/cotton blended fabric." International Journal of Clothing Science and Technology 30, no. 1 (2018): 16–28. http://dx.doi.org/10.1108/ijcst-12-2016-0142.
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Purpose Medical textiles is a vibrant emerging field in the area of technical textiles and its category is based on its performance and biofunctional properties for hygienic and health care products. Biodegradable fabrics are widely used for medical textiles in recent years. Seaweeds provide a wide range of therapeutic possibilities for human beings both internally and externally due to the presence of bioactive compounds. The paper aims to discuss these issues. Design/methodology/approach This present study investigates the development of bioactive gauze fabric from Chaetomorpha linum seaweed/cotton blended fibres and also analysed the characteristics of Chaetomorpha linum seaweed/cotton blended gauze fabric and 100 per cent cotton gauze fabric. The effect of fibres on physical properties of fabric such as tensile strength, air permeability, wickability, water drop test and colour fastness properties were analysed. The antibacterial properties and antioxidant activity were assessed by DPPH radical scavenging, AATCC 100 and EN ISO 20645 test methods. Findings The experimental results indicate that the maximum antioxidant activity of 103.28±1.23 per cent inhibition was achieved at minimum concentration (500 µg/ml) of the blended fabric extract, and maximum antibacterial reduction of 95 per cent and zone of inhibition of about 26 mm were achieved in a blended fabric. The tensile strength, percentage of elongation and air permeability were more or less the same in both gauze fabrics. It is also found that Chaetomorpha linum seaweed/cotton blended gauze fabric exhibit better wickability and water absorbency properties than 100 per cent cotton gauze fabric. The colour fastness properties to washing and rubbing showed excellent results in the blended gauze fabric, and it is used for making wound dressing materials. Originality/value This bioactive gauze fabric was used for non-implantable materials such as wound healing, face mask, surgical gowns and hygienic textiles in recent years.
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Knolle, Erich, Wolfgang Linert, and Hermann Gilly. "The Missing Color Change from Drying in Strong Base-Containing Absorbents Is Not Due to the Hygroscopic Properties of NaOH and KOH." Anesthesiology 96, Sup 2 (2002): A1156. http://dx.doi.org/10.1097/00000542-200209002-01156.
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Prastuti, Okky Putri, Eka Lutfi Septiani, Yuni Kurniati, Widiyastuti, and Heru Setyawan. "Banana Peel Activated Carbon in Removal of Dyes and Metals Ion in Textile Industrial Waste." Materials Science Forum 966 (August 2019): 204–9. http://dx.doi.org/10.4028/www.scientific.net/msf.966.204.
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Textile waste is produced in the starch process, a starch removal process, coloring, and printing. The use of banana peel (Musa Paradisiaca) was an alternative that was being developed as an absorbent to remove the color content and metal ions in textile waste. The purpose of this study was to analyze the workings and effectiveness of heavy metal adsorption and textile dyes with banana peel waste. Banana peel particles that were ready to be used as adsorbents were characterized using Scanning Electron Microscopy (SEM) to obtain particle morphology. Absorbance curve of Cu2+ dan Cr6+ can be obtained using spectrophotometric UV-Vis analysis with a wavelength of 635 nm for copper (Cu) and 469 nm for chromium (Cr). The activated carbon of banana peel was applied to 50 ml industrial waste solution and observed changes in absorbance for 120 minutes. The activated carbon was directly in contact with the solution of metal ions but the adsorption power was still not seen effectively so that the Atomic Absorption Spectroscopy (AAS) test was performed. The results of AAS analysis, namely activated carbon can reduce copper and chromium ion content respectively by 55.5% and 61%. If this activated carbon was used as an adsorbent for dyes in textile waste, the average absorption capacity of dye ion was 12.21% during the contact time of adsorption 120 minutes.
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Halukh, B., U. Drachuk, I. Simonova, I. Basarab, and I. Romashko. "Expanding the range of sausage products of special purpose." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 22, no. 94 (2020): 37–43. http://dx.doi.org/10.32718/nvlvet-f9408.
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Due to the deficiency of certain nutrients in the diet of athletes and many categories of the population, there is a need for more targeted use of meat and meat products and the inclusion of traditional foods with physiologically functional ingredients to replenish the body with appropriate nutrients. The article presents the development of technologies for new types of meat products using the protein-carbohydrate supplement “Gainer” – a concentrate of nutrients. Gainer protein-carbohydrate supplement is a powdered mixture of white, gray, yellow or other color with chocolate, vanilla, strawberry flavor or without taste, intended for gaining muscle mass. The protein in this mixture is presented in the form of a protein obtained from milk, carbohydrates are represented by starch obtained from corn.During the studies, the effect on the solubility of the additive was determined, the temperature of sodium chloride was found to pass into a solution of 1.08 to 1.28 mg/ml of protein, which is 42.9 and 48 % according to their total content, which is determined at plus 20 °C. As the temperature increases, the solubility of the proteins of the protein mixture increased, reaches maximum values at a temperature of about plus 50 °C and is 127 % of the initial level at plus 4 °C. A further increase in temperature leads to a decrease in the indicator and at plus 85 °C its value is 37.8 % of the initial level. In the presence of sodium chloride, the solubility of the protein mixture is significantly increased. The most noticeable changes were observed at a NaCl concentration of up to 1 % by weight of the solution. With increasing concentration of NaCl in the system, the solubility of proteins also increases, but less intensely. Studies of the ability to interact with fat have shown high absorbent, binding, emulsifying properties of the protein mixture of Gainer. The stability of emulsions is about 60 %, which corresponds to the emulsifying ability of collagen proteins. A study was also conducted to determine the amount of protein-carbohydrate supplement in cooked sausages. The study showed that the introduction of hydrated milk-protein mixture of protein and carbohydrate additives in the composition of minced meat leads to an increase in the mass fraction of moisture, decrease in the mass fraction of protein and fat in proportion to the increase in the level of raw meat in minced meat.
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Monisha, A. S., and G. Parasakthibala. "INVERSTIGATION OF RUBIA CORDIFLORIA (INDIAN MADDER) DYE ON SILK FABRIC." INDIAN JOURNAL OF APPLIED RESEARCH, August 1, 2021, 59–60. http://dx.doi.org/10.36106/ijar/7117613.
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Synthetic dyes release huge amount of waste and uniform colourants lead to health hazard. It also disturbing the ecobalance of the nature. Natural dyes are mostly derived from plants, invertebrates, or minerals. The most of the natural dyes are vegetable dyes from plant sources-roots, berries, bark, leaves, and wood—and other organic sources such as fungi and lichens. Natural dyes exhibit good biodegradability and are more compatible with the environment. In spite of their inferior fastness, natural dyes are more acceptable to environmentally conscious people around the world. The present study deals with the natural dyes extracted from Rubia Cordifloria. The extracted dye used to dye selected silk fabric and myrobalan mordant used for dye ability, fastness properties, absorbency test. Two shades with different concentration have been developed. Absorbency properties of the dyes extracted from madder and sinking test was determined. The colour fastness through washing and rubbing (Wet and Dry) was an excellent satisfaction in both different concentrations.
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"To study natural herbal dyes on cotton fabric to improving the colour fastness and absorbency performance." Journal of Textile Engineering & Fashion Technology 7, no. 2 (2021). http://dx.doi.org/10.15406/jteft.2021.07.00267.
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Nowadays, all consumers are more preference for the natural herbal textile dye garment products. These herbal dye cloths are more eco friendly products. It is give non-toxic, chemical free product and this does not harmful environment nature. Herbal textile is dyed entirely with herbal extraction, without using any sort of chemical. The herbs used different from vegetable dyes as they are not only natural but also have medicinal value. These herbs are applied directly to the fabric with the help of natural ingredients, So that the medicinal value of the herbs can be kept intact, because synthetic dyes large amount of waste and unfixed colorants poses serious health hazard and are disturbing the eco balance of nature. Environmental issues in the production and application of synthetic dyes once again revived consumer interest in natural dyes. In this research work we have applied natural herbal dyes on cotton fabrics surface. This work has used natural herbal dyes like turmeric, aloe vera, neem, beetroot, pomegranate and onion. Edible gum and cow urine has used to improve in colour fastness and dye absorbency performance. This research main aims to give a new approach natural herbal dyes products will more used in textile sector. It will more help to reduce diseases problem skin allergies and skin infection.
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Alom, Md Samiul, Farjana Badhon, Shompa Rani Halder, and Tonmoy Saha. "Implementation of Rainwater in Preparatory Processes as well as Dyeing of Knitted Cotton Fabric and Compare the Effects with Ground Water." Chemical Engineering Research Bulletin, June 23, 2021, 54–59. http://dx.doi.org/10.3329/cerb.v22i1.54300.
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Textile industries are very much intensive to water. A large amount of water is consumed every day during various textile processes and one of the main sources of this water is groundwater. This project aimed to work with rainwater which can be an alternative source of groundwater. In this project, the quality of rainwater was evaluated first and matched with the standard. From different tests such as turbidity, water hardness, amount of dissolved solids, and iron content, we found that the rainwater achieved the standard level of dye house water supply. After that, different wet preparatory processes, as well as dyeing of cotton fabric were carried out using rainwater. After completion of each process, evaluation was carried out such as weight loss percentage and absorbency for scouring, whiteness index for bleaching, and colour fastness tests of dyed fabric. The results were excellent compared with conventionally groundwater treated fabric.
 Chemical Engineering Research Bulletin 21(2020) 54-59
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M, Alhassan. "Adsorption Equilibrium, Physicochemical Parameters and Colour Deactivation Effects of Activated Carbon for Dye for Waste Water Treatment." Research on World Agricultural Economy 2, no. 1 (2021). http://dx.doi.org/10.36956/rwae.v2i1.345.
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Effluents from dye and dyeing industries constitute serious environmental threat and attracting serious attention. Activated carbon prepared from guinea corn husk and maize cobs waste materials was used as a precursor to prepare activated carbon. Variable ratios of the constituent ashes ( 1:1, 1:3 and 3:1) were prepared. The husk and cobs were ashed in a murfle furnace at 400-500oc for 2.5 h. Acid activation was carried out by washing with HCl (1M) after which it was characterized using XRF which revealed (in variable proportions) the presence of SiO2, Al2O3 and Fe2O3 as dominant oxides in the ashes. Waste water decolourization efficiency of the adsorbents was tested using dye waste water at same contact time using variable absorbent dosage. Higher moisture (96.80±0.56), Ash (12.90±0.35), pH (6.3±0.17), Conductivity (208±1.34) and Bulk density (12.27±0.61) were obtained for guinea corn husk. The best clearity was obtained after batch adsorption experiments at 1:1 which gave the highest adsorption at equilibrium (Qe) of 28.55 compared to 12.750 and 10.900 obtained for 1;3 and 3:1 respectively.
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"Preparation and Use of Aqueous Solutions Magnetic Chitosan / Nanocellulose Aerogels for the Sorption of Reactive Black 5." Biointerface Research in Applied Chemistry 11, no. 4 (2021): 12380–402. http://dx.doi.org/10.33263/briac114.1238012402.
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For the disposal of Reactive Black 5 from aqueous solutions, the hydrophilic, magnetic, and extremely porous aerogels derived from rice straw waste have been synthesized. The first rice straw was made of nanocellulose crystals. Instant gelation and cross-linking processes were then used to prepare magnetic chitosan/nanocellulose aerogel beads. The aerogels have been distinguished by different technology, namely FT-IR, TEM, EDX, DLS and VSM. Results revealed the effective preparation of magnet chitosan / nanocellulose aerogels. Reactive Black 5 can be removed in acidic media and at a time of touch of 30 minutes. The aerogels absorbed color should be used as a dye color in textile printing. Secondary emission can be avoided. The future use of magnet chitosan / nanocellulose aerogels as an absorbent color can be based on its simple environment, using minimum precursor effort.
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Hoque, Md Saiful, Md Jakir Hossain, Md Arefin Imtiaz, Shimul Das, and Muhammad Abdur Rashid. "Scope of Dry Wood and Wood Composite Alternate to Stone in Case of Acid Wash on Denim Fabric." International Journal of Current Engineering and Technology 8, no. 02 (2018). http://dx.doi.org/10.14741/ijcet/v.8.2.32.
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For the betterment of comfort ability, to impart decent fading effect and to make more exquisite, denim fabric is examined with different washing techniques. Usually, Acid wash is used to fade the color of denim to a higher degree and therefore this wash has a significant effect on the physical and mechanical properties of the denim. In this paper, we worked on to find out the comparison among stone, waste wood and wood composite in case of acid wash on denim fabric dyed with indigo dye. Denim garments were processed using some parameters such as temperature 30 °C, time 30 min as well as acid concentration (H3PO4) 1 ml/L, (KMnO4) 4 gm/l. This study was focused on the physical and mechanical properties like strength, weight loss, shrinkage, EPI and PPI, absorbency, color fading, GSM, wash, rubbing and perspiration fastness test and monitored the comparison of each treated and untreated fabric samples. It was noticeable that, a significant difference was found in case of Waste wood washed and wood composite washed garments in almost all properties than stone washed garments but the desired fading effects were achieved by acid washing with wood composite on denim fabric.
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"Methanol Extraction of Microbial Pigments For Polyester Fabric." International Journal for Research in Engineering Application & Management, January 31, 2020, 47–49. http://dx.doi.org/10.35291/2454-9150.2020.0009.
Full textAbstract:
Micrococcus Luteus is a bacterium that is Gram-positive. Bacteria with thicker cell walls are said to be grampositive bacteria, and it is said that thinner cell walls are gram-negative bacteria. In the natural flora of the mammalian body, micrococcus luteus is present in soil, dust, water and air. In the human mouth, mucosa, osopharynx, and upper airways, it is also present. In these two colonies, there are bright yellow pigments in the agar plate. Carotenoid containing a bright yellow color in the primary. M.luteus pigment with the highest variety of properties for anticarcinogenic and immune modulation. Anti-carcinogenic (an agent that destroys or prevents cancer cells).The yellow pigment has shown promising activity as antioxidant, antibacterial and UV-protective. Results that clearly indicate the potential application of these pigments after clinical trials as natural coloring agents and UV protection agents in food and pharmaceutical cosmetics in dustries. M.luteus has been shown to have activity. The strain was made of the coarse pigment. The dye absorbs Ultraviolet radiation and is used in cosmetics with sunscreen. It is a type of vitamin that is used in natural colors. In this study, the polyester fabric was chosen. In essence, polyester fabric is much less absorbent. But the color pigment was extracted using M.luteus methanol, which is showing very good promising color even for polyester fabrics.
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Alayli, Azize, Hayrunnisa Nadaroglu, and Esra Turgut. "Nanobiocatalyst beds with Fenton process for removal of methylene blue." Applied Water Science 11, no. 2 (2021). http://dx.doi.org/10.1007/s13201-021-01367-8.
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AbstractThe remediation of methylene blue from wastewater using chitosan-sunflower-nano-iron (CSN) beds was examined in this study with the Fenton process. Nano-iron is synthesized using the green synthesis process. Then, biopolymer beds obtained nano-iron, sunflower tray waste, and chitosan. These beds used the Fenton process for removing Methylene blue (MB) from water. Beds synthesis and dye removing are characterized using SEM, TEM, FTIR, and XRD techniques. For the method optimization, the effects of dye concentration, temperature, pH, H2O2, and amount of biocatalyst were studied. The result of the wavelength scan was found 660 nm for methylene blue dye. Using CSN, catalyst was very effective in color removal for MB under optimal conditions. The highest removal rate 98% was obtained at pH 6 for 270 min. The optimum conditions for the MB dye are as follows; dye concentration: 25 mg/L, amount of absorbent: 2.5 mg/mL, temperature: 60 °C, H2O2 amount: 20 mg/L (600 µL, 30%). When the experiment is studied in optimum conditions, max. dye removal was calculated to be 98%. From SEM, TEM, XRD, and FTIR results, the change in the surface of the biocatalyst could be clearly observed. It is understood that the biocatalyst synthesized from the results we obtained easily removed a large amount of dye (MB).
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Ünsal Sapan, Tuğba, Işıl Tuna Erdoğan, and Sevil Atasoy. "Human identification from washed blood stains." Bulletin of the National Research Centre 45, no. 1 (2021). http://dx.doi.org/10.1186/s42269-021-00600-3.
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Abstract Background Among the physical evidence, bloodstain is one of the most common biological pieces of evidence at the crime scene, especially in violent crimes. Bloodstains are frequently seen at the crime scene and can be easily detected due to their color and structure. Because blood and bloodstains can potentially be evidence of a crime, offenders often tend to clean or wash them to get rid of relevant evidence. Some researchers think that washed bloodstains cannot obtain enough quality DNA for DNA profiling. However, some studies have shown that bloodstains on a piece of fabric can be used for DNA profiling even after washing. This study, it is aimed to determine whether a sufficient amount of DNA can be obtained for DNA profiling used for forensic purposes from blood-stained nylon and cotton fabrics washed at different temperatures such as 40 °C, 60 °C and 90 °C. Results In this study, bloodstains were created on cotton and nylon fabrics in a representative crime scene. After washing with laundry detergent at 40 °C, 60 °C and 90 °C was performed, studies were conducted in order to make bloodstains visible and obtain DNA for genetic profiling. The result is that more DNA is lost due to easy exposure to external factors in the non-absorbent nylon fabric type compared to the absorbent cotton fabric. Moreover, the rates of obtaining DNA from bloodstains on different types of fabrics washed at several temperatures are shown in this study. Conclusions It was determined that while a sufficient amount of DNA for the forensic genetic profiling can be obtained from cotton and nylon fabrics washed at 40 and 60 °C, a sufficient amount could not be obtained from the ones washed at 90 °C. And that shows even if bloodstained fabrics are washed at 60 °C, the fabrics still can be considered as physical evidence of the crime and can be associated with the scene, perpetrator and victim triangle.