Articles de revues : « Fibre de cotton »

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Chowdhury, Mohammed Rubaiyat, et Ayub Nabi Khan. « Study on the properties of yarn produced by 100% pima cotton fibre ». Journal of Textile Engineering & ; Fashion Technology 9, n^o 1 (6 mars 2023) : 21–24. http://dx.doi.org/10.15406/jteft.2023.09.00328.

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To produce higher count of yarn long staple length cotton fibres are used. Specially, long staple length Pima and Giza cotton fibres are used for this purpose. In this study to produce 80Ne carded yarn Pima cotton fibre was used. Pima Cotton is a long stable fiber. Which is normally produced in Australia and America. In this study different properties of yarn like thick, thin and neps, CSP, fineness of pima cotton fibre were tested. It was evident that the quality of the yarn produced was good in quality to produce different fine quality fabrics.

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Chakraborty, Shankar, et Siddhartha Bandhopadyay. « Cotton fibre selection and grading – a PROMETHEE-GAIA-based approach ». International Journal of Clothing Science and Technology 29, n^o 5 (4 septembre 2017) : 646–60. http://dx.doi.org/10.1108/ijcst-12-2016-0137.

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Purpose In spinning industries, selection of the most appropriate fibre for yarn manufacturing plays an important role for achieving an optimal mix of several yarn characteristics, like maximum tenacity, elasticity and spinning ability; and minimum unevenness and hairiness. Identification of the best suited cotton fibre from a set of available alternatives in presence of different conflicting physical properties is often treated as a multi-criteria decision-making (MCDM) problem. The paper aims to discuss this issue. Design/methodology/approach In this paper, the preference ranking organisation method for enrichment of evaluations (PROMETHEE) and geometrical analysis for interactive aid (GAIA) methods are integrated to solve a cotton fibre selection problem. The PROMETHEE II method ranks the alternative cotton fibres based on their net outranking flows, whereas GAIA acts as a visual aid to strongly support the derived selection decision. The weight stability intervals for all the considered fibre properties (criteria) over which the position of the top-ranked cotton fibre remains unchanged are also determined. Findings The clusters of cotton fibres formed in the developed GAIA plane act as a yard stick for their appropriate grading to aid the blending process. The ranking of 17 cotton fibres as achieved applying the combined PROMETHEE-GAIA approach highly corroborates with the observations of the past researchers which proves its immense potentiality and applicability in solving fibre selection problems. Originality/value Two MCDM methods in the form of PROMETHEE II and GAIA are integrated to provide a holistic approach for cotton fibre grading and selection while taking into consideration all the available cotton fibre properties.

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Ergashev, Yuldashali, et Dilshodjon Akhmadjonov. « COTTON MEDIUM FIBRE COLOUR ASSESSMENT ». American Journal Of Applied Science And Technology 02, n^o 05 (1 mai 2022) : 23–28. http://dx.doi.org/10.37547/ajast/volume02issue05-05.

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The Uster HVI system evaluates the colour of medium staple cotton fibre based on the international universal standard and replaces the subjective visual colour assessment of Uzbek cotton fibre determined by the classifier with an objective instrumental measurement.

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Günaydin, Gizem Karakan, Ali Serkan Soydan et Sema Palamutçu. « Evaluation of Cotton Fibre Properties in Compact Yarn Spinning Processes and Investigation of Fibre and Yarn Properties ». Fibres and Textiles in Eastern Europe 26, n^o 3(129) (30 juin 2018) : 23–34. http://dx.doi.org/10.5604/01.3001.0011.7299.

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Fibre properties are influential factors for yarn properties. Cotton, whose physical properties vary depending on the cultivation region, is still a very common fibre used in the textile industry. Properties such as fibre length, fineness, strength and maturity affect yarn tensility, evenness, imperfections and hairiness. Four different 100% cotton blends were used as raw material (American cotton, Aegean cotton, Urfa cotton, Greek cotton) to be converted into 20 tex compact yarns separately. HVI parameters of each blend type starting from the bale until the 2nd drawing passage machine revealed that yarn processing stages and machinery are influential factors for fibre the properties of fibres that are produced on a spinning line. Additionally ANOVA tests supported the idea that the evenness, tensility, yarn imperfections, and hairiness parameter of yarns produced from various cotton blends were statistically different. Principal Component Analyses (PCA) and the Correlation Matrix were also applied in order to analyse the relationship between fibre properties and compact yarn properties of different blends.

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Masood, Ammara, Nadia Iqbal et Hira Mubeen. « Review A Short Review of Promoters of Cotton Fibre Genes : Strength and Tissue Specificity ». Biological Sciences - PJSIR 63, n^o 2 (15 juillet 2020) : 127–31. http://dx.doi.org/10.52763/pjsir.biol.sci.63.2.2020.127.131.

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Promoters are of great importance for controlling gene expression. There are various regulatory regions within promoters which are crucial for expression specificity. Depending upon mode of expression, promoters can be divided into constitutive, tissue/developmental stage specific or inducible promoters. For expression of certain gene, there is interplay of cis acting element located on promoter and transcription factors. Cotton fibre promoters are of great importance in biotechnology as these may be used to express fibre genes in cotton fibres specifically. Although most of cotton fibre gene promoters show expression in fibres but some of them also exhibit expression in various other organs like trichomes, pedicles and vascular tissues. Due to difficulties in somatic embryogenesis in cotton, these promoters are mostly studied in heterologous systems like Arabidopsis and tobacco. In this article, expression pattern of some cotton fibre genes promoters have been reviewed.

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Aronsson, Julia, et Anders Persson. « Tearing of post-consumer cotton T-shirts and jeans of varying degree of wear ». Journal of Engineered Fibers and Fabrics 15 (janvier 2020) : 155892502090132. http://dx.doi.org/10.1177/1558925020901322.

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The demand for textile fibres is growing quickly. However, global cotton production has stabilized around 25 Mton/year. This is a sound development since cotton cultivation causes major sustainable development issues. Even if regenerated cellulose fibre production steadily grows, it is still only from a sixth to a fifth of cotton volumes. Hence, it is essential to find resource-efficient routes to generate alternatives to virgin cotton. There are many promising research initiatives that discover the possibility to utilize waste streams of neat cotton and cotton in fibre blends as raw materials for dissolving pulp for regeneration into, for example, viscose or Lyocell. However, there is a much simpler and energy-efficient route at hand. If fabrics are disintegrated mechanically, the separated fibres can be turned into yarn again. However, since fibre length is a key parameter to accomplish strong and durable textiles, fibre length loss upon tearing should be minimized. This study evaluates how fibre length distribution alters upon tearing of post-consumer cotton waste of two different constructions: denim and single jersey; and different degrees of wear, rendering four different fractions: (1) barely worn denim, (2) rather worn denim, (3) barely worn single-jersey and (4) rather worn single-jersey. Before tearing, the garments were dissembled, their yarns were characterized, fibre length distributions were manually determined for (1)–(4). Length analysis of the recovered fibres after tearing revealed that the length drop was most severe for (a) the finer single-jersey and (b) the barely worn fractions. The findings suggest that significant wear does not exclude from mechanical recycling.

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Ravindra B. Malabadi, Kiran P. Kolkar et Raju K. Chalannavar. « Industrial Cannabis sativa : Role of hemp (fiber type) in textile industries ». World Journal of Biology Pharmacy and Health Sciences 16, n^o 2 (30 novembre 2023) : 001–14. http://dx.doi.org/10.30574/wjbphs.2023.16.2.0450.

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This review paper highlights the importance and role of hemp fibre in textile industries. In recent years, there has been a resurgence of interest in hemp as a sustainable and versatile textile fibre in fashion and textile industry. Hemp is a sustainable and environmental friendly crop that can provide valuable raw materials to a large number of industrial applications. Hemp fibre is very strong compared with other natural fibres such as cotton, flax and nettle. The cultivation of hemp has significantly less environmental impact compared to cotton. The industrial hemp contains primary and secondary fibres of which the primary fibres are utilisable for the textile end use. Hemp has been the mostly blended with cotton and synthetic fibres due to barriers in the industrial process of the production of full hemp-based textiles. Hemp clothing is stronger and more durable than cotton clothing and does not deform as easily. Apparel made from hemp merges easily with dyes and does not discolour easily. Hemp has outstanding antibacterial properties that surpass those of cotton and also any other natural fibre. Hemp textile fibre is hypoallergenic and has natural antimicrobial properties, making it an excellent choice for individuals with sensitive skin. However, despite its many benefits, hemp is still relatively expensive in India compared to other cellulosic fibres such as cotton, linen, and rayon etc. Hemp has a great cultural and historical value in India because it has been grown and used here for thousands of years. This cultural history can be conserved and honoured by using hemp in the fashion and textile business.

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Motin, Md Mominul, Hasan Mazharul Haq, Ayub Nabi Khan, Md Obaidur Rahman et Md Omar Ali. « Investigating the Ideal Combination of Virgin Cotton Fibre Length with Recycled Fibre for Better Yarn Quality ». Textile & ; Leather Review 7 (7 mars 2024) : 391–402. http://dx.doi.org/10.31881/tlr.2024.009.

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This study examines the effects of blending virgin cotton fibres of selected lengths with a fixed percentage of recycled fibres on yarn quality. By choosing three different lengths of virgin cotton fibres and incorporating 20% recycled fibre, we investigate the resultant yarn properties through detailed statistical analysis. Our research identifies significant enhancements in yarn quality with increased virgin fibre length, offering new insights into effective fibre blending strategies. This investigation supports the textile industry in refining fibre blend ratios for improved yarn qualities while advocating for sustainable practices through the utilization of recycled fibres. It sets the stage for future exploration aimed at optimizing the balance between virgin and recycled fibres to achieve superior yarn characteristics.

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Ruan, Yong-Ling. « Recent advances in understanding cotton fibre and seed development ». Seed Science Research 15, n^o 4 (décembre 2005) : 269–80. http://dx.doi.org/10.1079/ssr2005217.

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The unique feature of the seed of tetraploid cotton (Gossypium hirsutum and Gossypium barbadense) is that about 30% of the seed coat epidermal cells develop into cellulose-enriched fibres, while the embryos synthesize oils and proteins. Hence, both the maternal and filial tissues of the cotton seed are of significant economic value. After initiation from the ovule epidermis at or just before anthesis, the single-celled fibres elongate to 2.5–6.0 cm long in the tetraploid species before they switch to intensive secondary cell wall cellulose synthesis. Thus, apart from its agronomic importance, the cotton fibre represents a model single-cell system to study the control of cell differentiation and elongation, carbon partitioning to cellulose synthesis and also the interaction between maternal (fibre) and embryonic tissues in seeds. Over the past decade or so, significant effort has been made to understand the cellular and molecular basis of cotton fibre development and oil biosynthesis in the embryo. Metabolic engineering of the oil biosynthetic pathway in cotton seed has successfully produced healthier and stable oils. A number of candidate genes and cellular processes that potentially regulate various aspects of fibre development have been identified. Further elucidation of the in vivo functions of those candidate genes could significantly deepen our understanding of fibre development and offer potential for improvement of fibre quality through genetic engineering or marker-assisted breeding approaches.

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Parasakthibala, Ms G., et Mrs A. S. Monisha. « A Review on Natural Fibers ; Its Properties and Application Over Synthetic Fibers ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 8 (31 août 2022) : 1894–97. http://dx.doi.org/10.22214/ijraset.2022.46530.

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Abstract: Fibre is a long, thin strand or thread of material made by weaving or knitting threads together. Fibre is a hair like strand of material. A fibre is the smallest visible unit of any textile product. Fibres are flexible and may be spun into yarn and made into fabric. Natural fibres are taken from animals, vegetables or mineral sources. A few examples of widely used natural fibres include animal fibre such as wool and silk vegetables fibres, especially cotton and flax and asbestos, a mineral. Natural fibers are more important part in our human environment. Natural fibers are ecofriendly and inexpensive which are readily available in nature. In this chapter we discuss about the overview of natural fiber and their characteristic. this paper also deals with the impact of natural fibers over the synthetic fibers and also the application of natural fiber in various fields.

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Sivia, Sukhdeep Singh, S. S. Siwach, O. Sangwan et Sunayana . « Development of superior hybrids for fibre quality based on heterosis and combining ability in upland cotton (Gossypium hirsutum L.) ». International Journal of Agricultural Invention 2, n^o 02 (18 novembre 2017) : 185–96. http://dx.doi.org/10.46492/ijai/2017.2.2.14.

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The cultivated Gossypium spp. represents the most important, natural fibre crop in the world. Breeding for high cotton yield is still the primary goal of cotton breeding programs, but improving fibre quality has become increasingly important. The enhancement of fibre quality traits like fibre length, strength, and fibre fineness is an essential requirement for the modern textile industry. The objective of this study was to facilitate the selection in cotton breeding program and estimate the general combining ability (GCA) of the parents and specific combining ability (SCA) of hybrids considered for the development of high yielding and better fiber quality in early generations. The study was carried out at cotton research area, CCS Haryana Agricultural University, Hisar (India) during 2014 and 2015 kharif season. Fifteen cotton lines (which have maximum diversity) and four testers (which are known as well adapted and high yielding) were crossed in a line x tester mating design in 2014. Nineteen genotypes and 60 F1 hybrids were planted in the randomized complete block design with three replications at the same experimental area in 2015. The ratio of δ2 GCA /δ2 SCA was less than unity for all the nine characters indicating preponderance of non-additive gene action (dominance and epistasis), which is an important in exploitation of heterosis through hybrid breeding. The best general combining ability was detected from the parent H1470 for seed cotton yield, H1464 and H1098-i for fiber quality traits. SCA was significant for AC726 x H1236, ISR12 x H1226, HR1 x H1117 hybrid combinations for yield and fiber quality. The crosses H1470 x H1236 and H1470 x H1098-i were reported good heterosis for seed cotton yield as well as for fibre quality, selected the best hybrids were H1464 x H1098-i and H1463 x H1226. These cross combinations involved at least one parent with high or average GCA effect for a particular trait. The cross combination involving H1470, H1098-i and H1464 parents’ recorded significant positive heterosis with acceptable SCA effect for both yield and fibre quality parameters. This investigation concluded that the parents H1470, H1098-i and H1464 can be used in hybrid development programme with better fibre quality.

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SARIOGLU, ESİN, HALI İBRAHIM ÇELİK, GİZEM KARAKAN GÜNAYDIN et ELIF GÜLTEKİN. « Effect of regenerated cellulosic fibre content in polyester/regenerated and cotton/regenerated blend yarns on comfort properties of woven fabrics ». Industria Textila 73, n^o 02 (30 avril 2022) : 128–36. http://dx.doi.org/10.35530/it.073.02.20219.

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This study investigates some comfort properties of cotton and polyester fabrics blended with varying ratios (%) of regenerated cellulosic fibres including Viloft®, ProModal®, and bamboo fibre. 23 types of woven samples made of Viloft®, ProModal®, and bamboo regenerated cellulosic fibres blended with polyester and cotton at different proportions (100%, 67/33%, 50/50%, 33/67%) besides with 100% cotton and 100% polyester fabrics were produced. Woven samples were subjected to some comfort tests including air permeability (mm/sec), wicking rate (mm/sec), water absorption ratio (%), and water vapour permeability index was also obtained. Statistical test results regarding fibre type, fibre blend components, and blend ratio (%) on fabric comfort properties were evaluated by using the SPSS program. In the content of this experimental work, it was revealed that fibre type, fibre blend components, and blend ratio have a significant effect on some comfort properties such as air permeability, wicking rate, and absorption ratio. However, those parameters did not have any significant effect on the water vapour permeability index at a 95% significance level.

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Sârbu, T., et C. E. Stroe. « ANALYSIS OF THE MECHANICAL PROPERTIES OF SOME HIGHTECH YARNS WITH DIFFERENT FUNCTIONS ». TEXTEH Proceedings 2021 (22 septembre 2021) : 287–92. http://dx.doi.org/10.35530/tt.2021.38.

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We live in a knowledge-based society, which is facing an increasing impact of science and technology on all aspects of life through products, services and consumer needs. In the future, society will be oriented towards the individual and his needs, which will be more and more complex and varied. The present paper comparatively presents a series of variants of cotton fibre yarns: made of blended cotton fibres with ultra-high molecular weight polyethylene fibres; yarns of cotton fibres blended with regenerated cellulose fibres, that were functionalized with Ag ions and yarns obtained from fibre blends of recycled organic cotton, virgin cotton with recovered cotton fibres in order to observe their mechanical potential. The built-in functionalities allow their use in areas such as healthcare and hygiene, sports and leisure activities. The recovery of textile waste in a circular approach and the transition to a circular economy is an important direction for research. The repercussions that the consumption of raw materials in the textile industry has, on the environment, as well as on sustainability, determine us to reason in a judicious way when we select the different materials that we use in making the products.

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Farooq, Assad, Muhammad Ilyas Sarwar, Muhammad Azeem Ashraf, Danish Iqbal, Azmat Hussain et Samander Malik. « Predicting Cotton Fibre Maturity by Using Artificial Neural Network ». Autex Research Journal 18, n^o 4 (1 décembre 2018) : 429–33. http://dx.doi.org/10.1515/aut-2018-0024.

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Abstract Cotton fibre maturity is the measure of cotton’s secondary cell wall thickness. Both immature and over-mature fibres are undesirable in textile industry due to the various problems caused during different manufacturing processes. The determination of cotton fibre maturity is of vital importance and various methods and techniques have been devised to measure or calculate it. Artificial neural networks have the power to model the complex relationships between the input and output variables. Therefore, a model was developed for the prediction of cotton fibre maturity using the fibre characteristics. The results of predictive modelling showed that mean absolute error of 0.0491 was observed between the actual and predicted values, which show a high degree of accuracy for neural network modelling. Moreover, the importance of input variables was also defined.

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Masood, Ammara, Hira Mubeen et Nadia Iqbal. « Sequence Analysis and Expression Study of LTP7 Promoter Isolated from Cotton (Gossypium hirsutum L.) ». Biological Sciences - PJSIR 62, n^o 3 (2 décembre 2019) : 148–58. http://dx.doi.org/10.52763/pjsir.biol.sci.62.3.2019.148.158.

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Lipid transfer proteins (LTPs) have role in transfer of phospholipids along biological membranes. A cotton LTP7 promoter was isolated using high throughput genomic sequences (HTGS) data base. Analysis of promoter nucleotide sequence revealed a number of crucial regulatory elements including core promoter elements. A 1.8 kb fragment of LTP7 promoter was isolated from genomic DNA of cotton and finally cloned in plant expression vector to characterize its functionality. Transient GUS assay revealed that promoter showed expression in cotton fibres during the time of elongation and different stages of secondary cell wall synthesis. Deletion analysis at 5' end showed that 1 kb promoter showed strong expression during stage of secondary cell wall synthesis. Whereas, 1.5 kb deletion fragment exhibited less strong expression in cotton fibres. Results of this present study, showed that 1 kb deletion fragment and 1.8 kb LTP7 promoter exhibits fibre specific expression and may be used to express fiber genes in cotton.

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Bourgou, Larbouga, Windpouiré Vianney Tarpaga, Sidiki K. Diane et Denys Sanfo. « Evaluation et sélection d’une variété de cotonnier (FK64, Gossypium hirsutum L.) au Burkina Faso ». International Journal of Biological and Chemical Sciences 14, n^o 3 (18 juin 2020) : 869–82. http://dx.doi.org/10.4314/ijbcs.v14i3.18.

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Le coton du Burkina Faso est presqu’entièrement exporté ; les variétés cultivées doivent régulièrement répondre aux exigences du marché. Une fratrie de lignées de cotonnier a été comparée à deux variétés, FK37 et Stam 59A, respectivement dans les zones cotonnières humides et sèches de 2006 à 2009, pour mettre en exergue celle qui améliore les performances agronomiques et technologiques de fibre de ces témoins. A l’issue d’évaluations multilocales, FK64 et FK69 ont été identifiées comme de potentielles nouvelles variétés et testées en milieu paysan. Dans les zones humides, FK64 et FK69 n’ont pas apporté d’amélioration significative ; il est inopportun de les y vulgariser. Dans les zones sèches, FK64 a le mieux performé et a été retenue pour y être vulgarisée. Elle apporte un surplus en pourcentage fibre (+ 0,41%) et en seed index (+ 0,35 g). Aussi, elle apparait meilleure que Stam 59A pour la longueur (+ 1,44 mm) et la ténacité (+ 1,90 g/tex), deux caractéristiques déterminantes du marketing de la fibre. Avec la suspension du coton Bt et le retour à la culture conventionnelle, FK64 lancée en culture commerciale a convaincu. Elle pourrait être candidate à la transformation en cas de retour dans la technologie Bt.Mots clés: Evaluations multilocales, tests variétaux, caractéristiques agronomiques, caractéristiques technologiques, Burkina Faso. English Title: Assessment and selection of a cultivar of cotton (FK64, Gossypium hirsutum L.) in Burkina Faso Cotton produced in Burkina Faso is almost entirely exported; so cultivars must be developed following the market demand. A sibling of cotton lines was compared to two varieties, FK37 and Stam 59A, respectively in humid and dry cotton production areas between 2006 and 2009 to highlight which one enhances agronomic and fiber quality performances compared to the local control. After multilocation trials, FK64 and FK69 were highlighted as promising news varieties then evaluated under farmer’s conditions of production. In the humid areas, FK64 as well as FK69 did not bring any significant improvement; it was not recommended to release any of them there. In the dry production areas, FK64 performed better, then it was retained to be possibly popularized. It brings a surplus in terms of ginning out turn (+ 0,41%) and seed index (+ 0,35 g). Moreover, it outperformed Stam 59A in fiber length (+ 1,44 mm) and strength (+ 1,90 g/tex), two major cotton fiber marketing properties. At the morrow of the suspension of the Bt cotton and back to conventional production, FK64 was launched in commercial production and it convinced. It could be aspirant to Bt introgression in case country resumes back to the technology.Keywords: multilocation trials, varietal trials, agronomical characteristics, fiber properties, Burkina Faso.

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Ahmad, Faheem, Muhammad Tausif, Muhammad Zahid Hassan, Sheraz Ahmad et Mumtaz H. Malik. « Mechanical and comfort properties of hydroentangled nonwovens from comber noil ». Journal of Industrial Textiles 47, n^o 8 (17 juin 2017) : 2014–28. http://dx.doi.org/10.1177/1528083717716168.

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Cotton is one of the most important commodity fibres and is widely employed in apparels. At present, the share of natural fibres in production of nonwoven fabrics is low and are used in opt applications. The cotton fibre is conventionally converted into woven and knitted fabrics by short staple spinning methods. The comber noil is short fibre waste produced when cotton yarns are combed. The aims of the current study were to employ comber noil for the preparation of hydroentangled cotton nonwovens at varying water jet pressures and conveyor speeds. The effect of these parameters was studied with respect to mechanical and comfort properties of the prepared fabrics. The results showed that these variables can help to manufacture fibrous assemblies with engineered properties, according to required application area.

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Murodov, Orif Zh, et Mansurbek E. Ruzmetov. « Study of changes in the technological performance of raw cotton when storing ». Technologies & ; Quality 54, n^o 4 (23 décembre 2021) : 30–36. http://dx.doi.org/10.34216/2587-6147-2021-4-54-30-36.

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The results of the experiments showed that with an increased density of raw cotton that occurs in the lower layers of the bundle and an increase in its shelf life, an increase in the mass fraction of defects and trash in the fibre is observed. It was found that with an increase in the density of raw cotton more than 250 kg/m3, the mass fraction of defects and weeds in the fibre increases by almost 10 %, the damage to seeds by 6 %, the staple mass length decreases by 3 %, and the proportion of short fibres by 9 %. The increase in the shelf life of the fibre also negatively affects the quality of the fibre and seeds and, most importantly, cotton for grades III–V. An increase in the mass fraction of flaws and trash in the fibre, in turn, affects the unevenness of the yarn and the quality category of the resulting yarn.

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Ortega, Raquel, Mario D. Monzón, Zaida C. Ortega et Eoin Cunningham. « Study and fire test of banana fibre reinforced composites with flame retardance properties ». Open Chemistry 18, n^o 1 (7 avril 2020) : 275–86. http://dx.doi.org/10.1515/chem-2020-0025.

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AbstractThe interest in natural fibre reinforced composites is growing in industrial applications due to natural fibres being an attractive alternative to synthetic fibres. However, it is necessary to improve the fire behaviour of the material because natural fibres have a high combustibility. The objective of this work is to evaluate the fire resistance of polymer composites reinforced with natural fibre fabric, using magnesium hydroxide as flame retardant for the polymeric matrix and alkali treatment for the fibre. The types of fabric are banana, banana with cotton and linen; and long banana fibre has been used for the formation of a nonwoven. The fire test is carried out based on ISO 9773 standard and the effect of the additive has been studied, chemical treatment, type of fabric and number of layers. Through statistical analysis, it is concluded that the flame propagation speed has a decreasing relation with respect to the percentage, but it decreases the mechanical properties considerably. In addition, the number of layers and type of fabric influence the fire properties. Finally, it is concluded that composites reinforced with linen fabric have the best mechanical properties, but banana nonwoven with 60% additive has the best fire behaviour.

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Liu, Xueying, Philippe Moncuquet, Qian-Hao Zhu, Warwick Stiller, Zhengsheng Zhang et Iain Wilson. « Genetic Identification and Transcriptome Analysis of Lintless and Fuzzless Traits in Gossypium arboreum L. » International Journal of Molecular Sciences 21, n^o 5 (29 février 2020) : 1675. http://dx.doi.org/10.3390/ijms21051675.

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Cotton fibres, as single cells arising from the seed coat, can be classified as lint and fuzz according to their final length. Gossypium arboreum is a cultivated diploid cotton species and a potential donor of the A subgenome of the more widely grown tetraploid cottons. In this study, we performed genetic studies on one lintless and seven fuzzless G. arboreum accessions. Through association and genetic linkage analyses, a recessive locus on Chr06 containing GaHD-1 was found to be the likely gene underlying the lintless trait. GaHD-1 carried a mutation at a splicing acceptor site that resulted in alternative splicing and a deletion of 247 amino acid from the protein. The regions containing GaGIR1 and GaMYB25-like were found to be associated with fuzz development in G. arboreum, with the former being the major contributor. Comparative transcriptome analyses using 0-5 days post-anthesis (dpa) ovules from lintless, fuzzless, and normal fuzzy seed G. arboreum accessions revealed gene modules and hub genes potentially important for lint and fuzz initiation and development. Three significant modules and 26 hub genes associated with lint fibre initiation were detected by weighted gene co-expression network analysis. Similar analyses identified three vital modules and 10 hub genes to be associated with fuzz development. The findings in this study contribute to understanding the complex molecular mechanism(s) regulating fibre initiation and development and indicate that G. arboreum may have fibre developmental pathways different from tetraploid cotton. It also provides candidate genes for further investigation into modifying fibre development in G. arboreum.

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Nirmala Shivram, Padmavat. « A systematic investigation on the influence of the chemical treatment of natural fibres using the Fuzzy TOPSIS Method ». Sustainable Architecture and Building Materials 2, n^o 1 (1 mars 2023) : 01–10. http://dx.doi.org/10.46632/sabm/2/1/1.

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Chemical treatment (hazardous waste) is the conversion of hazardous waste into non-toxic gases, to change or change the chemical characteristics of waste Treatment methods are used, for example in water By decreasing solubility. OracidityNeutralization or pH adjustment (neutralization or precipitation), oxidation and reduction, hydrolysis and Photosynthesis, chemical oxidation (ozonation, (electrolytic oxidation, hydrogen peroxide) and chemical removal (alkali metaldichlorine, alkali)chemical treatment processes Various (commonly used) including metallization/ soCommonly Activated Chemical Treatment Processes: Chemical Precipitation, neutralization absorption, disinfection (chlorine, ozone, UV light) and ion exchange. from plant kingdomCommon natural fibres obtained are Cotton, Flax, Jute, Bamboo, Sisal and Jute, Natural fibres. The main component Natural fibres. The main component Popular as angora and mohair We get fibres, plant fibres include seed hairs such as cotten; Flax andstem (or bast) fibres like jute, leaf fibres like sisal; and coconut-like husks fibres. Animal fibres also include secretions such as wool, hair, and silk. Research significance: In this paper, various chemical properties of in natural fibre-reinforced composites Use natural fibres Changes have been reviewed. Alkali, Silane, Acetylation, Benzoylation, Acrylation, malate coupling agents, isocyanates, Permanganate and other chemical treatments are discussed. to the fibre surface Chemical treatment of fibre between polymer matrixAimed at improving adhesion. Water absorption of composites decreases and their mechanical Properties are improved. Method: Fuzzy TOPSIS (Order by Similarities for Ideal Solution technique for prioritization) similar options. Further It also automates the process and selection Ambiguity, uncertainty in the process Can also be used to relieve Technology in general Used to solve decision problems. This is for all alternatives in the technique problem Based on inter-comparison. Alternative: Cotton, Jute, Flax, Hemp, Ramie and Sisal. Evaluation parameters: Density, Elongation, Tensile strength and Young’s modulus. Result: Chemical Treatments of Natural Fibre in Sisal is got the first rank whereas is the Hemp is having the Lowest rank.Conclusion: Chemical Treatments of Natural Fibre in Sisal is got the first rank whereas is the Hemp is having the Lowest rank.

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GOKANI, S. J., et V. S. THAKER. « Role of gibberellic acid in cotton fibre development ». Journal of Agricultural Science 138, n^o 3 (mai 2002) : 255–60. http://dx.doi.org/10.1017/s0021859602001934.

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Fibres of three cotton cultivars (Gossypium hirsutum H-4, H-8 and G. arboreum G. Cot-15) were analysed for growth in terms of fibre length and dry weight and endogenous gibberellic acid (GA3) content thrice during 1997–2000, at Rajkot. The development of cotton fibre was divided into four distinct growth phases but overlap between elongation and secondary thickening was considerable which suggests that both these phases are independent of each other. During fibre elongation, GA3 content remained low and increased after a decrease in the rate of fibre elongation in all three genotypes. The long staple cultivar (H-4) showed highest endogenous GA3 content followed by the middle one (H-8) and the short staple cultivar (G. Cot-15). In in vitro studies when GA3, NAA or GA3+NAA was supplemented to the media, increase in fibre length of the short staple cultivar was maximum, followed by the middle one and the long staple cultivar. Both in vivo and in vitro findings suggest that GA3 is one of the important factors that determine fibre length.

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Yilmaz, Demet, Sinem Yelkovan et Yasir Tirak. « Comparison of the Effects of Different Cotton Fibre Wastes on Different Yarn Types ». Fibres and Textiles in Eastern Europe 25 (31 août 2017) : 19–30. http://dx.doi.org/10.5604/01.3001.0010.2340.

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In order to make a contribution to the reduction of raw material costs, in the present study the effect of reused cotton fibres on the quality of conventional ring and OE-rotor yarns was investigated. In the yarn production, it three different waste fibres were taken from a cotton yarn production line and blended with primary cotton fibres at five different levels varying from 5% to 40%. In literature, studies have concentrated on the usage of recovered waste fibre in OE-rotor yarn production. However, to date there has been limited extensive and comparative research on the effect of recovered fibre quality on different yarn properties to determine the possibility of high-quality yarn production from reused fibres. In the study, we focused on the effect of different waste types as well as the amount of waste in the blends on the properties of different yarn types.

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Mikucioniene, Daiva, Lina Cepukone, Khalifah A. Salmeia et Sabyasachi Gaan. « Comparative Analysis of Peat Fibre Properties and Peat Fibre-Based Knits Flammability ». Autex Research Journal 19, n^o 2 (1 juin 2019) : 157–64. http://dx.doi.org/10.1515/aut-2018-0033.

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Abstract A very promising cellulose-based natural fibre that is suitable for use in the textile industry is peat fibre. This fibre is a by-product of peat excavation, purified by separating it from other components. In this study, the morphological, chemical and mechanical properties of peat fibres as well as flammability of peat-based knitted fabrics were analysed. The average diameter of the peat fibres is ~60 μm, but it varies in very wide ranges – 25–150 μm; however, the number of fibres with diameter more than 100 μm is very low. As the peat fibre contains a high amount of lignin, lignin amount in the mixed peat/cotton yarn is relatively high too. Lignin is responsible for enhanced flame retardancy; therefore, time to ignition of the peat knit is ~30% higher than that of the cotton knit. Consequently, peat fibre can be used in the knitted structure in order to significantly reduce its flammability. In order to increase the flame retardancy, the knits have been treated by flame retardant in various concentrations. It was found that around the burned hole on the peat knit, treated by very low concentration flame retardant, forms charred area and the knit stops to burn even if the flame source is not removed.

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Ruan, Yong-Ling, Danny J. Llewellyn et Robert T. Furbank. « Pathway and control of sucrose import into initiating cotton fibre cells ». Functional Plant Biology 27, n^o 9 (2000) : 795. http://dx.doi.org/10.1071/pp99154.

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This paper originates from a presentation at the International Conference on Assimilate Transport and Partitioning, Newcastle, NSW, August 1999 Our aim is to unravel the mechanisms controlling fibre cell initiation from the epidermis of cotton (Gossypium hirsutum L.) ovules. We compared the development of fibres and trichomes in wild type cotton and a fibreless seed (fls) mutant, and determined the cellular pathway of sucrose transport into fibre initials on the day of anthesis. Although fibre initiation is inhibited in the fls mutant, leading to the fibreless phenotype, trichome development in other parts of the plant is normal. Confocal imaging analysis revealed that the fluorescent molecule, 5(6)-carboxyfluorescein, which is transported symplastically, moved readily from the integument phloem into initiating fibres. Plasmolysis studies showed that the fibre initials and adjacent non-initiating ovule epidermal cells have similar osmotic potential. Immunolocalisation analysis showed the absence of sucrose transporter proteins in the initiating fibre, but their abundance in the transfer cell precursors at the innermost integument. These results (i) demonstrate that fibre cell initiation is controlled by unique mechanism(s) that differ from that for normal trichome development; (ii) show a symplastic pathway of sucrose import into initiating fibres and strengthen the current opinion that sucrose synthase is likely to be the key enzyme mobilising sucrose into initiating fibres; and (iii) suggest that the initial protrusion of the fibre cells above the ovule surface is largely achieved by increased cell wall extensibility rather than higher turgor as is commonly thought.

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DAGET, Tekalgn Mamay, et Getnet Belay TESEMA. « EFFECT OF SAW GINNING ON THE FIBRE QUALITY OF Bt AND NON-Bt COTTON ». Tekstil ve Mühendis 29, n^o 128 (30 décembre 2022) : 208–18. http://dx.doi.org/10.7216/teksmuh.1222470.

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Bt cotton refers to a plant which has Bacillus thuringiensis (Bt) toxins in many of its cells. This naturally occurring soil bacterium will be used to reduce insect damage from bollworm, pink bollworm, and budworm. Therefore, farmers who are cultivating the Bt cotton variety will not be subjected to spray pesticides to control these worms. Whereas in this study, the non-Bt cotton (DP-90) refers to the commercially known variety which have no Bacillus thuringiensis (Bt) toxins in its cells. During the cultivation of non-Bt cotton varieties, the control of bollworms is done through the application of pesticides, which is a costly exercise in terms of cost of pesticides, spray equipment and labour. Along with the cost of cultivation, the best index to cotton quality is the performance of the fibres during spinning at the textile mill. In the present study the effect of saw ginning to the quality of both varieties was studied. The result could help the spinners to predict the preperformance of both varieties when subjected to the mechanical action of modern high rotating spinning machines parts. Ginning results a significant effect (at 0.05 level of significance) in all other measured fibre quality properties (upper half mean length, length uniformity index, short fibre content by number and by weight, level of neps, single fibre tenacity and elongation) of both Bt and non-Bt (DP-90) cotton varieties. The impact of ginning on the studied fibre quality properties was relatively severer on Bt cotton varieties than non-Bt (DP-90) varieties.

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Arnold, Lyndon, et Rajiv Padhye. « Development of a Process to Continuously Mercerise Loose-Stock Cotton ». Materials Science Forum 1117 (19 mars 2024) : 73–80. http://dx.doi.org/10.4028/p-ph2mr9.

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Cotton has traditionally been mercerised as hanks of yarn or as open-width fabrics, but commercial methods to mercerise loose stock directly after ginning have been limited. Arnold and Rippon [1,2] produced continuous lengths of fully mercerised sliver with increased fibre strength, enhanced dye-uptake, improved surface lustre, without fibre shrinkage. Not only did the method prevent shrinkage, but fibres could be stretched by as much as 4% and then stably set. The disadvantage of this method was that fibre had to be fully processed to sliver form.An improved prototype machine has now been successfully developed to continuously mercerise ginned loose stock. Testing has confirmed that the output fibres are mercerised along their full lengths and have higher tenacity compared with the un-mercerised Control. Fibre lengths have also been maintained, indicating that the shrinkage normally caused by slack mercerising has been prevented. Fibre dyeability is comparable with that of slack-mercerised samples but better than the un-mercerised Control. The improved lustre expected for fibre mercerised under tension has also been confirmed. The production rate of the process can be readily improved, and the prototype expanded in size to increase output.

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Seçer, Müzeyyen, Ömer Lütfü Elmaci et Şafak Ceylan. « The Effects of Organic Wastes on Soil and Cotton Quality with respect to the Risk of Boron and Heavy Metal Pollution ». International Journal of Agronomy 2016 (2016) : 1–7. http://dx.doi.org/10.1155/2016/7438327.

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The effects on soil and cotton quality of organic wastes from medicinal and aromatic plant factories were investigated with regard to the risks of boron and heavy metal pollution. Oily cumin, oregano, oilless oregano wastes, and mineral fertilizers were applied to cotton in two field experiments performed in the years 2003 and 2006. The Pb content of the soil differed significantly in the 2003 experiment and oregano wastes had significantly decreasing effect. Boron of soil to which oily cumin wastes had been applied reached a toxic limit value in 2006. Boron in soil adversely affected long fibres; B in leaves had a positive effect on the fineness of fibres in 2006. Soil Ni adversely affected plant height in 2006 and seed cotton yield in 2003. Leaf Ni had an adverse effect on fibre elasticity in 2006. Soil Co increased ginning out-turn and Cr decreased the fibre fineness of cotton in 2003.

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Singh, Jaspinder. « A Comparative Study of the Experimental Investigation of different types of fibres used in Concrete ». INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, n^o 04 (6 avril 2024) : 1–5. http://dx.doi.org/10.55041/ijsrem30247.

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Different types of fibres used in concrete have received much attention in civil engineering in recent years, mainly because they improve the low tensile strength and shrinkage cracks of concrete. However, there are still many problems in the research results on different types of Fibers. For example, there is still debate about the performance-enhancing or detrimental effects of different types of fibres in concrete. There is also a dispute about the influence of the size, strength, elastic modulus and other characteristic parameters of each fibre on the properties of the substrate. Research on fibre mixing rules of hybrid fibre reinforced concrete (HFRC) is incomplete. There is controversy regarding the choice of fibres for hybrid yarns as well as the characterization of the hybrid effect. In summary, it is necessary to review, synthesize and compare current research on FRC. Based on the major research achievements on FRC in recent years, this article synthesizes and evaluates existing research in experimental research and theoretical research on different types of fibre materials, aiming to create Reference conditions for researchers in the same field. Finally, combined with research experience in related fields, new perspectives and proposals on FRC's research are proposed for research and application. This research paper is mainly focus on the different fibres (glass, cotton, steel). KEYWORDS:- GLASS FIBRE, COTTON FIBRE, STEEL FIBRE, TENSILE STRENGTH, COMPRESSIVE STRENGTH,

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Monga, D., et S. K. Sain. « Incidence and severity of cotton leaf curl virus disease on different BG II hybrids and its effect on the yield and quality of cotton crop ». Journal of Environmental Biology 42, n^o 1 (30 janvier 2021) : 90–98. http://dx.doi.org/10.22438/jeb/42/1/mrn-1296.

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Aim: To understand the effect of Cotton Leaf Curl Disease incidence and severity at various crop growth stages on Bollgaurd-II cotton hybrids having different levels of susceptibility and resistance and its effect on, seed cotton yield and fibre quality. Methodology: The effect of cotton leaf curl disease (CLCuD) incidence, severity and its progress on highly resistant to susceptible cultivars was compared. The loss of seed cotton yield (SCY) corresponding to CLCuD incidence at 80 DAS, 81-110 DAS, 111-140 DAS was estimated separately in each hybrid. The loss of fibre quality corresponding to CLCuD incidence at seven different stages, i.e., 50 to 140 days after sowing (DAS) was also calculated. Results: The highest relative area under disease progress curve (AUDPC) values of PDI were observed in Ankur 3028 (100%) and Ankur Jai BG II (83%), while the lowest values were recorded in highly resistant hybrids Yuva-841-2 (4.6%) and Bunty 2113-2 (13.8%). When the disease appeared up to 80 DAS compared to 110, 140 DAS the reduction range in SCY (4.6-62.4%), fibre length (23.9-29.9%), strength (21.4-30.1%) and uniformity (62.5-83%) was recorded to be higher in susceptible hybrids. The fibre length, strength, and uniformity were reduced in diseased plant (25.9 mm, 24.4 g/tex, 68.2%) when incidence took place at 50 DAS compared to disease-free plants (27.6mm, 25.9 g/tex, 72.9%). However, reduction in SCY, fiber length, fiber strength and uniformity at 80 DAS varied with respect to hybrid and their resistance category. Interpretation: These results provide the basis to prove the hypothesis that the yield loss is associated with the stage of CLCuD incidence and its severity in cotton hybrids with different levels of resistance as well as its genetic potential of a particular cotton cultivar. However, the extent of yield reduction within the resistant or susceptible category is also dependent on the yield potential of a particular cultivar. Thus, breeders must consider both the criteria-lower PDI /AUDPC and higher productivity to select high yielding cotton lines. Key words: Cotton, Disease index, Leaf Curl Disease, Virus

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Sumithra, Murugesan, et Gayathri Murugan. « Extraction and characterization of natural fibres form Elettaria Cardamomum ». Tekstilna industrija 69, n^o 2 (2021) : 30–33. http://dx.doi.org/10.5937/tekstind2102030s.

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Natural fibres are one of the good alternative sources for replacing synthetic fibres and reinforcing polymer matrices because of their eco-friendly nature. The present study was undertaken to investigate the fibres extract from Elettaria Cardamomum plant. The extracted Elettaria Cardamomum fibre was treated with NaOH for softening. Natural cellulose fibres extracted from Elettaria Cardamomum stems (ECS) have been characterized for their chemical composition and physical properties.The chemical composition of Elettaria Cardamomumstems (ECS) fi bres is, cellulose 60.44%, lignin 25.25%, wax 0.53%, ash 5.45%. Regarding physical properties of the fibres, single fibre strength was evaluated and the result was compared with cotton fibre and linen fibre.

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M.M., Ubaydullaev, et Makhmudova G.O. « MEDIUM FIBER S-8290 AND S-6775 COTTON AGROTECHNICS OF SOWING VARIETIES ». European International Journal of Multidisciplinary Research and Management Studies 02, n^o 05 (1 mai 2022) : 49–54. http://dx.doi.org/10.55640/eijmrms-02-05-12.

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Mburu, Ann Wairimu, Josphat Igadwa Mwasiagi et Joseph Kinyanjui Muiruri. « Influence of gin trash bacteria broth treatment on cotton fibres ». Research Journal of Textile and Apparel 24, n^o 3 (26 juin 2020) : 267–80. http://dx.doi.org/10.1108/rjta-10-2019-0051.

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Purpose Bacterial exopolysaccharides (eps) have fascinating chemical compositions, properties and structures which could be used in the modification of natural fibres. Bacterial eps have therefore been used to modify plant cellulose fibre surface and impart desired properties. The purpose of this paper is therefore to investigate the influence of gin trash cultured bacteria eps on the physical and structural properties of cotton fibres. Design/methodology/approach Gin trash soil sample was collected from a ginnery in Kenya, and physiochemical and microbial characterization was done. The soil sample was then fermented for 24 h before being used to treat raw cotton fibres at varied conditions of temperature, pH and treatment time periods. Physical and structural properties of the treated fibres were then determined using USTER HVI-1000 M700, Fourier transform infrared, scanning electron microscope (SEM) and X-ray diffraction (XRD) and compared with those of the raw fibres. Findings The bacteria broth treated fibres were found to have increased in strength, spinning consistency index, elongation and fineness by 25.44, 24.30, 11.70 and 3.60%, respectively. The variations were attributed to interactions of bacterial eps with cotton cellulose through hydrogen bonding. SEM and XRD analysis revealed an increase in fibre surface roughness and crystallinity, respectively. Originality/value Bacterial eps have been used to modify plant cellulose fibre surface and impart desired properties. Eps producing bacteria have been isolated from different habitats such as saline water, soil samples, food wastes and petroleum-contaminated soil. To the best of the authors’ knowledge, bacterial eps cultured from gin trash soil sample for modification of cotton fibres have however not been previously done, hence the originality of the current study.

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TOGOLA, Mamadou, Awa S. DOUMBIA, Mouctar BABA, El hadj M. KASSAMBARA, Daouda dit Odiouma KONATE, Fousseny V. CISSOUMA, Amadou Aboubacar MAIGA et Ibrahima DIAWARA. « Etude Comparative Des Produits Issus De La Transformation En Filature Des Fibres De Trois Nouvelles Variétés De Cotonnier ». International Journal of Progressive Sciences and Technologies 34, n^o 2 (21 octobre 2022) : 314. http://dx.doi.org/10.52155/ijpsat.v34.2.4632.

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Résumé - Au Mali, comme ailleurs en Afrique, la sélection variétale est à la base du succès de la culture cotonnière. Le coton du Mali est presqu’entièrement exporté ; les fibres issues des variétés cultivées doivent répondre aux exigences du marché en termes de caractéristiques technologiques des fibres, facteurs clés du fonctionnement de la filature. Cette étude comparative a été réalisée sur trois nouvelles variétés de cotonniers A, B et C, issues d’un point d'expérimentation. L'objectif de l'étude est d’identifier les variétés ayant les meilleures performances variétales et industrielles pour la vulgarisation en production commerciale par les sociétés cotonnières. 1 échantillon représentatif de 100g de coton fibre, 20 échantillons de 5 m de rubans de carde, d’étirage et de 10 m de mèches, 30 échantillons de 100 m de fil et 40 échantillons de 500 mm de fil ont été respectivement prélevés par balle de chaque variété et à différentes étapes du processus de transformation par variété. Ces échantillons ont été testés sur des appareils de mesure dans les conditions requises au laboratoire de métrologie textile du CERFITEX, Ségou - Mali.L’analyse de variance (ANOVA) des données relatives aux fibres, rubans, mèches et fils et la comparaison de leurs principales caractéristiques de qualité à celle de la production mondiale avec l’application des USTER STATISTICS 2018 ont montré que les variétés de cotonnier A et B sont nettement meilleures que celle de C. Les performances variétales et industrielles de A et B, meilleures que celles de C sont recommandées à la vulgarisation Mots clés : Coton, caractéristiques technologiques, qualité, fibres, fils. [Comparative Study Of The Products Resulting From The Transformation Into Spinning Of The Fibers Of Three New Varieties Of Cotton]Abstract - In Mali, as elsewhere in Africa, varietal selection is the basis of the success of cotton growing. Cotton from Mali is almost entirely exported; fibers from cultivated varieties must meet market requirements in terms of the technological characteristics of fibers, key factors in the operation of the spinning mill. This comparative study was carried out on three new varieties of cotton A, B and C, from an experimental point. The objective of the study is to identify the varieties with the best varietal and industrial performance for popularization in commercial production by cotton companies. 1 representative sample of 100g of cotton fiber, 20 samples of 5m of carding and drawing slivers and 10m of rovings, 30 samples of 100m of yarn and 40 samples of 500mm of yarn were respectively taken per bale of each variety and at different stages of the transformation process by variety. These samples were tested on measuring devices under the required conditions at the CERFITEX textile metrology laboratory, Ségou - Mali.The analysis of variance (ANOVA) of fiber, sliver, roving and yarn data and the comparison of their main quality characteristics to that of world production with the application of USTER STATISTICS 2018 showed that cotton varieties A and B are clearly better than those of C. The varietal and industrial performances of A and B, better than that of C are recommended for popularisation Keywords : Cotton, technological characteristics, quality, fibres, yarns.

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Mishra, Pramod Kumar, Manjeet Singh, Anoop Dixit, Bharat Patel, Anand Gautam, S. K. Pandey et Karun Sharma. « Effect of Cleaning Methods on Trash Contents and Fibre Quality for Seed Cotton ». International Journal of Bio-resource and Stress Management 14, Feb, 2 (26 février 2023) : 338–46. http://dx.doi.org/10.23910/1.2023.3281a.

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The present study was carried out at Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, India during May to December, 2017 to evaluate the effect of mechanical cleaning methods on mechanically harvested cotton. The treatments consisted of three cotton cleaning methods viz. Boll Crusher cum Seed-Cotton Extractor, Pre-cleaner and On-board cleaner (field cleaner). The comparative performance of these methods was evaluated in terms of cotton fibre quality parameters viz. span length, uniformity ratio, elongation (%), micronaire (%), fibre strength (g tex-1) and reflectance of cotton lint etc. The minimum trash content (seed cotton basis) was observed for boll crusher+pre-cleaner (5.17%) and maximum for on-board cleaner (21.4 %). The 2.5% span length for the manual was observed maximum (26.04 mm) and the minimum for boll crusher+pre-cleaner (23.83 mm). The uniformity ratio observed was minimum for manual (45.99) and maximum for boll crusher+pre-cleaner (47.29). The micronaire for the manual was observed as a minimum (3.97%) and maximum for boll crusher+pre-cleaner (3.57%). The fibre strength for manual (20.50 g tex-1) was maximum whereas it was minimum for boll crusher+pre-cleaner (19.36 g tex-1). The reflectance for manual (0.87) was observed as minimum and maximum for boll crusher+pre-cleaner (0.81). Based upon the fiber quality parameters of harvested cotton cleaned by boll crusher machine was of superior quality but it was inferior in quality for the boll crusher+pre-cleaner machine.

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Sultanov, K. S., S. I. Ismoilova et S. E. Tulanov. « COTTON YARN BREAKING MECHANISM UNDER STRETCHING ». Technologies & ; Quality, n^o 3 (2019) : 17–21. http://dx.doi.org/10.34216/2587-6147-2019-3-45-17-21.

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Topical issues of textile yarn breakage in technological processes are considered in the paper. Based on a comparative analysis of cotton yarns specific breaking load with cotton fibre specific breaking load obtained in experiments, it was concluded that when the yarn breaks, the cotton fibres do not. This conclusion contradicts hypothesis of Aleksey Solov'yov that some of the cotton fibres are torn when the yarn is stretched to a break. Experimental results show that when the yarn is stretched to a break, all cotton fibres slip out of the yarn. So, the main force of resistance to external tensile force is the friction force between the fibres in the yarn. These results require the study of internal forces in the yarn at the meso-structural level. Experimental and theoretical studies of the meso-mechanics of cotton yarn can lead to new technologies for producing textile yarns of higher strength.

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YUAN, S. N., W. MALIK, N. BIBI, G. J. WEN, M. NI et X. D. WANG. « Modulation of morphological and biochemical traits using heterosis breeding in coloured cotton ». Journal of Agricultural Science 151, n^o 1 (12 mars 2012) : 57–71. http://dx.doi.org/10.1017/s0021859612000172.

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SUMMARYHeterosis breeding is a potential tool for developing coloured cotton hybrids, having good fibre yield and quality. The objective of the present study was to explore the extent of heterosis breeding for the modulation of fibre quality and biochemical traits during fibre development. The performance of 10 interspecific (Gossypium hirsutum L.×Gossypium barbadense L.) and four intraspecific (Gossypium hirsutum L.×Gossypium hirsutum L.) F1 coloured cotton hybrids and their parents was assessed under field conditions in 2008/9. Two interspecific, two intraspecific F1 coloured cotton hybrids and their parents were used to examine the role and changes in the amount of different biochemicals during the different stages of fibre development (2009). Among hybrids, interspecific brown cotton hybrids (ZUC × ZUA) and interspecific green cotton hybrids (ZUF × ZUA) showed high amounts of useful heterosis for yield, yield components and fibre quality attributes. Analysis of various biochemicals depicted a decline in fibre pH value and flavonoid contents among all hybrids and their parents, with maximum decrease in interspecific hybrids (ZUC × ZUA and ZUF × ZUA) at 15 days post anthesis (DPA). Similarly, a significant increase in the amount of cellulose, glucose and fructose was observed in all genotypes. However, the magnitude of increase was greatest in interspecific coloured cotton hybrids as compared to their parents and intraspecific hybrids. The negative correlation of fibre pH with flavonoid contents and the positive correlation of carbohydrates with cellulose contents (particularly at 15 DPA) suggested the significance of these biochemicals controlling fibre quality. In conclusion, heterosis breeding can be efficiently utilized to develop high-quality coloured cotton hybrids by modulating the synthesis of different biochemicals associated with fibre development and its quality.

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Sawarkar, Miss Rutuja. « Stabilization of Black Cotton Soil Using Lime and Bamboo Fiber Mixture as a Subgrade Material ». International Journal for Research in Applied Science and Engineering Technology 11, n^o 6 (30 juin 2023) : 4741–53. http://dx.doi.org/10.22214/ijraset.2023.54517.

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Abstract: The design of pavements on black cotton soil has always been a difficult task for the engineers as the structure and pavement resting on black cotton soil cracks without any warning. Black cotton soil is most commonly found in Indian region. Soil proportion changes depending upon their constituents, i.e., water content, density, bulk density, compressive strength etc. The properties of black cotton soil can be modified by stabilizing the soil with the use of additives or by mechanical means. The aim of this project is to find the optimum percentage of lime separately and lime + bamboo fibre separately to be added in black cotton Soil and study the properties of soil. In this project an attempt has been made to stabilize the soil using lime and bamboo fibre. Initially lime is blended with black cotton soil in different proportions (2%, 4%, 6%, 8%). The experimental work included the tests carried out on virgin black cotton soil and lime added black cotton soil which are Liquid limit, Plastic limit, modified proctor, specific gravity, free swell index, C.B.R. test, unconfined compressive strength test. On the basis of the soaked CBR and Modified Proctor Values, it is determined that 6% of lime is an optimum percent which can be added to stabilize black cotton soil for road construction. So, 6% lime is added with black cotton soil and different percentages of bamboo fibres (2%, 4%, 6%, 8%). California Bearing Ration, modified proctor test, Unconfined Compressive strength test are performed on the soil mixture of 6% lime + Black Cotton Soil + different percent of Bamboo Fibre. On the basis of the soaked CBR, it is concluded that if 6% lime with 8% of bamboo fibre is blended in black cotton soil, engineering properties of BCS can be improved to such an extent that the pavements built on this soil can efficiently withstand the loads applied on it while vehicular movement. Hence, according to the results obtained from experimental study, pavement design is performed for CBR 5%, 6%, 8%. The evaluation of cost for each pavement design is carried out which shows the decrease in cost of construction of pavement as the CBR values increases.

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Aditi et Spriha Sharma. « Forensic examination of different textile fibres using UV- Vis spectroscopy ». E3S Web of Conferences 509 (2024) : 03017. http://dx.doi.org/10.1051/e3sconf/202450903017.

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Objective: The purpose of this study is to forensically examine different textile fibres using UV/visible spectroscopy. Methodology: Five different fibre types of ten different local brands have been analyzed using uv-vis spectroscopy.Each fibre was dissolved in 3ml of chloroform and were kept overnight for the extraction of dye from the fabric. Then the extracted dye sample was analysed in UV-vis spectroscopy. Results: The results demonstrated that concentration of dye was higher in cotton samples and lower in polyester samples. The mean concentration of dye in cotton samples were (443.0-846.5) nm, polyester (402.0-656.0) nm, jute (484.0-673.5) nm and silk (402.0-661.0) nm respectively. But in wool samples dye did not get extracted. It may be because in wool keratin is present and these materials differ only by the presence of crysteine in wool, which were more intense for wool fibres. Conclusion: There has been a considerable amount of importance of fibre evidence in criminal investigations. Investigating the various dyes utilised to colour textile fibres can provide extra information in the process of determining the chemical compounds of the fibre. In the forensic study of fibres, colour discrimination relies heavily on UV/visible spectroscopy.

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Gaval, Vivek Ramdas. « Mechanical Properties Evaluation for Cotton/Glass/Epoxy Hybrid Composite ». ASM Science Journal 17 (17 octobre 2022) : 1–9. http://dx.doi.org/10.32802/asmscj.2022.1031.

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Natural fibre reinforced composites of any group are essential to satisfy the current demand and to keep the environment-friendly approach. In the present work, an attempt has been made to replace glass fibres partially by cotton fabric so as to reduce weight and cost of the resultant composite Here, cotton fabric 0.4 mm thick (125 GSM) and fibreglass woven roving 0.15 mm thick (180 GSM) were used with epoxy resin in different weight fractions to prepare hybrid composites. The composites were prepared using hand lay-up method. The Tensile strength, flexural strength, impact strength and hardness tests were performed as per ASTM standards and results are reported for each sample. The specimens were characterised using scanning electron microscope (SEM). The mechanical properties of composites with 80% glass fibre and 20% cotton fabric are found to be closer to glass/epoxy composites. Hence it is concluded that 20% glass fibres can be replaced by cotton fabric in the existing glass/epoxy products in which mechanical properties are important.

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Behera, B. K. « COMFORT AND HANDLE BEHAVIOUR OF LINEN-BLENDED FABRICS ». AUTEX Research Journal 7, n^o 1 (1 mars 2007) : 33–47. http://dx.doi.org/10.1515/aut-2007-070104.

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Abstract Few can dispute the tremendous values of linen, which is one of nature’s greatest treasures. Linen is a longer-staple category, and as such the fibre is spun on a long-fibre spinning system. Due to the coarseness and stiffness of the fibre, linen fabrics are subjected to a strong bleaching action to reduce the stiffness of the fabric. Linen is also blended with other compatible natural and manmade fibres to achieve various structural and functional properties, and also to reduce costs. Fabrics produced from 100% linen and their blends with cotton and viscose have been studied for handle and comfort properties. Linen fabrics produce excellent aesthetic and drape properties. Linen fabrics are found to be tougher than cotton and other blends. However, linen offers the highest tensile resilience and the lowest friction coefficient under low stress-loading conditions. Linen fabric produces superior primary hand with respect to Fukurami and Shari. The total hand value (THV) of processed linen fabric is higher than that of cotton fabric as a summer wear. The blending of viscose and cotton improves the hand value of linen fabric.

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S, Arunvenkatesh, et Rajendran K. « Evaluation of Plant Density and Cotton Genotypes (Gossypium hirsutum L.) on Yield and Fibre Quality ». Madras Agricultural Journal 102, March (2015) : 22–25. http://dx.doi.org/10.29321/maj.10.001059.

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Field experiments were conducted during winter season of 2011-12 and 2012-13 at Tamil Nadu Agricultural University, Coimbatore to study the feasibility of using cotton genotypes under high density planting system and to assess its effect on seed cotton yield, oil content and fibre quality parameters. The experiments were laid out in a strip plot design, replicated thrice. The soil in the experimental site was sandy clay loam with low available nitrogen (182 kg/ha), medium available phosphorus (12.6 kg/ha) and high available potassium (340 kg/ha). The experiment consisted of seven cotton genotypes viz., Jai, Ranjeet, TCH 1608, SVPR 3, Anjali, Suraj and LH 900 with four spacings viz., 30 × 30, 45 × 30, 60 × 30 and 90 × 30 cm. Ranjeet planted at the spacing of 30 × 30 cm recorded significantly higher seed cotton yield. The percentage of oil content was significantly higher in Ranjeet genotype than other cotton genotypes. The fibre quality parameters viz., fibre length, fibre strength, micronaire, elongation percentage were significantly influenced by different cotton genotypes. The oil content and fibre quality was not significantly influenced by plant densities.

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KUMAR, DEEPAK, OMENDER SANGWAN, MINAKSHI JATTAN, SANDEEP KUMAR, SOMVEER, GANESH KUMAR KOLI et VIVEK SINGH. « Harnessing the association between morphological, biochemical and fibre quality traits in desi cotton (Gossypium arboreum) genotypes ». Indian Journal of Agricultural Sciences 94, n^o 2 (13 février 2024) : 150–55. http://dx.doi.org/10.56093/ijas.v94i2.144660.

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An experiment was conducted during the rainy (kharif) seasons of 2019 and 2020 at the research farm of Chaudhary Charan Singh Haryana Agriculture University, Hisar, Haryana to study the relationship between morphological, biochemical and fibre quality parameters in 150 desi cotton [Gossypium arboreum (L.)] genotypes in augmented design. Findings of the experiment indicated that the seed cotton yield per plant was significantly and positively correlated with all the traits except days to first flower (-0.226) and plant height (-0.521), while, negatively correlated with biochemical and fibre quality traits. Thus, while improving other traits, seed cotton yield per plant will also increase. Fibre quality traits like fibre length was significant and positively (0.754) correlated with fibre strength but negatively correlated with seed cotton, suggesting quality and quantity can not be improved simultaneously. Hence selection should be done very precisely that as one can not be compromised. Path analysis also revealed that the maximum contribution towards yield was by the number of bolls per plant (0.57), boll weight (0.33), GOT (0.11) and the number of monopods (0.10). Fibre quality parameters did not show any significant contribution directly or indirectly to seed cotton yield. The five traits, viz. number of bolls per plant, number of monopods, ginning outturn (%), seed index (g) and number of seed per boll can contribute to the improvement in cotton. Overall, the significance of this study lies in its potential to yield improvement in desi cotton.

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Shamsiddinovich, Muminov Najmiddin, Alimova Zarina Muzaffarovna et Vasiev Xayrulla Ulugbekovich. « Research On Cotton Fibre For The Production Of Quality Textile Products ». American Journal of Agriculture and Biomedical Engineering 03, n^o 06 (18 juin 2021) : 30–37. http://dx.doi.org/10.37547/tajabe/volume03issue06-04.

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The article presents the theoretical foundations of cotton and cotton fibre as the main strategic raw material for the production of quality textiles. It also highlights a brief history of the origin, properties, cultivation, collection and use of cotton. Information about the current state of the world market for the production and use of cotton. It will be argued that quality assurance is a complex problem that requires a lot of effort and responsibility on the part of all participants in the production of textile products. In addition, the methods and results of the study of quality indicators of cotton fibre - as the main raw material for textiles are presented.

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Odilzhanovich, Toshmirzaev Kodirjon, Ibragimov Akhadzhon Odilzhanovich et Dilshodjon Rasuljonovich Ahmadjonov. « ASSESSMENT OF COTTON FLOW COLOUR IN USTER HVI SYSTEM ». American Journal Of Applied Science And Technology 02, n^o 05 (1 mai 2022) : 11–17. http://dx.doi.org/10.37547/ajast/volume02issue05-03.

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The Uster HVI system reflects the assessment of the colour of cotton fibre on the basis of international universal standards and the replacement of the subjective visual assessment of the colour of cotton fibre in Uzbekistan by objective instrumental measurement

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Altundag, Rojda, et Emine Karademir. « PLANT SPACING AND ITS EFFECT ON YIELD, FIBRE QUALITY AND PHYSIOLOGICAL PARAMETERS IN COTTON ». Journal of Applied Life Sciences and Environment 186, n^o 2 (7 décembre 2021) : 200–215. http://dx.doi.org/10.46909/journalalse-2021-018.

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The purpose of this study was to see how changing plant spacings affected cotton yield, yield components, fibre quality traits, and physiological parameters. In this study, six plant spacings (no thinning, 5, 10, 15, 20, and 25 cm) were investigated. Plant density caused significant differences in the number of first fruiting branches, number of bolls, ginning percentage, seed cotton yield, fibre yield, and normalised difference vegetative index (NDVI). Plant height, the number of sympodial branches, number of monopodial branches, boll weight, seed cotton weight/boll, number of 100-seed weight, seeds/boll, canopy temperature, chlorophyll content, leaf area, and fibre quality properties (micronaire, length, strength, elongation, uniformity, short fibre index, reflectance, yellowness, and spinning consistency index [SCI] were non-significant. The highest values of seed cotton yield, fibre yield, ginning percentage, number of first fruiting branches, and NDVI were obtained in the no thinning and 5 cm plant spacing applications, while the highest boll number was obtained at 20 and 25 cm plant spacings. In this study, physiological parameters, such as canopy temperature, leaf area, chlorophyll content, and fibre technological traits, were not affected by plant spacing. The highest seed cotton yield, fibre yield, ginning percentage and NDVI were obtained from no thinning and 5 cm intra-row spacing, indicating their impact on examined characteristics. Therefore, a yield estimation can be made in the flowering period with the NDVI in different plant densities in cotton.

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Luo, Qunying, Michael Bange et David Johnston. « Environment and cotton fibre quality ». Climatic Change 138, n^o 1-2 (22 juin 2016) : 207–21. http://dx.doi.org/10.1007/s10584-016-1715-0.

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Lovell, David, Yingru Wu, Rosemary White, Adriane Machado, Danny J. Llewellyn, Elizabeth S. Dennis et Robert S. Anderssen. « Phenotyping cotton ovule fibre initiation with spatial statistics ». Australian Journal of Botany 55, n^o 6 (2007) : 608. http://dx.doi.org/10.1071/bt07003.

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Yield in cultivated cotton (Gossypium spp.) is affected by the number and distribution of fibres initiated on the seed surface but, apart from simple statistical summaries, little has been done to assess this phenotype quantitatively. Here we use two types of spatial statistics to describe and quantify differences in patterning of cotton ovule fibre initials (FI). The following five different species of Gossypium were analysed: G. hirsutum L., G. barbadense L., G. arboreum, G. raimondii Ulbrich. and G. trilobum (DC.) Skovsted. Scanning electron micrographs of FIs were taken on the day of anthesis. Cell centres for fibre and epidermal cells were digitised and analysed by spatial statistics methods appropriate for marked point processes and tessellations. Results were consistent with previously published reports of fibre number and spacing. However, it was shown that the spatial distributions of FIs in all of species examined exhibit regularity, and are not completely random as previously implied. The regular arrangement indicates FIs do not appear independently of each other and we surmise there may be some form of mutual inhibition specifying fibre-initial development. It is concluded that genetic control of FIs differs from that of stomata, another well studied plant idioblast. Since spatial statistics show clear species differences in the distribution of FIs within this genus, they provide a useful method for phenotyping cotton.

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Stankovic, Snezana, Dusan Popovic et Goran Poparic. « Thermal properties of directionally oriented polymer fibrous materials as a function of fibre arrangement at mesoscopic level ». Thermal Science 23, n^o 5 Part B (2019) : 3117–27. http://dx.doi.org/10.2298/tsci181011105s.

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Thermal properties of directionally oriented fibrous materials have been investigated in this research with the purpose of considering the influence of fibre arrangement at mesoscopic level. The range of various distributions of fibres in the fibrous materials was obtained by applying different twist intensity during spinning of cotton fibres. From various twisted cotton yarns the knitted fabrics were produced under controlled conditions, so as to obtain as similar as possible constructions. This made possible to obtain the heterogeneity of the porous fibrous structures coming from the mesoscopic level. Thermal conductivity and heat transfer coefficient of the materials were investigated. The results obtained indicate the arrangement of fibres (or their compactness, orientation and migration), which, in turn, was determined by twist intensity (mesoscopic scale), as the key factor influencing thermal properties. Yarn compactness and fibre migration, determined by lateral forces imposed by the twist inserted in yarn, affected variations in structural parameters of the knitted fabrics, and thus influenced their thermal properties. Fibre orientation manifested itself in surface geometry of the yarn was also proved to have a considerable influence on heat transfer properties.

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Gairola, Surya P., Yogesh Tyagi et Nitin Gupta. « Mechanical properties evaluation of banana fibre reinforced polymer Composites : A review ». Acta Innovations, n^o 42 (14 mars 2022) : 59–70. http://dx.doi.org/10.32933/actainnovations.42.5.

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In today's fast-developing world, the use of composite materials is closely related to environmental pollution, renewable and biodegradable resources. A researcher is looking for environmentally friendly materials. Natural and synthetic fibres come in a wide range of shapes and sizes. Natural fibres include jute, straw wheat, rice husk banana fibre, pineapple leaf fibre, cotton, Sisal, Coir, Oats, and Bagasse. Every year, 13.5 tonnes of banana fibre are produced in India. Teabags, paper, and polymer composite reinforcement are just a few of the applications for banana fibre. This article focuses on the manufacture of banana fibre with epoxy and a variety of other natural fibres. By combining banana fibre with some current technology, waste will be reduced, and energy efficiency will be increased, all while supporting sustainability. Banana fibres are covered in this work, along with their uses, applications, and mechanical qualities, as well as how banana fibre might improve mechanical properties.

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