Dissertation/ Thesis
Study of the within-bale variability of the technological characteristics of cotton fibers produced in Western and Central Africa ; Etude de la variabilité intra-balle des caractéristiques technologiques des fibres de coton produites en Afrique de l'Ouest et du Centre
| العنوان: | Study of the within-bale variability of the technological characteristics of cotton fibers produced in Western and Central Africa ; Etude de la variabilité intra-balle des caractéristiques technologiques des fibres de coton produites en Afrique de l'Ouest et du Centre |
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| المؤلفون: | Aboe, Modeste |
| المساهمون: | Laboratoire de Physique et Mécanique Textiles (LPMT), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Haute Alsace - Mulhouse, Artan Sinoimeri |
| المصدر: | https://theses.hal.science/tel-00718836 ; Autre. Université de Haute Alsace - Mulhouse, 2012. Français. ⟨NNT : 2012MULH4771⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Cotton, Between bales variability, Within-bale variability, Sampling, Technological characteristics, Fiber, Classification, Repeatability, Variabilité inter-balles, Répétabilité, Classement, Variabilité intra-balle, Echantillonnage, Caractéristiques technologiques, Coton, Fibre, [SPI.OTHER]Engineering Sciences [physics]/Other |
| الوصف: | Thanks to the technical and technological developments of the last decades, the international cotton trade is moving from a manual and visual classification to one based on instrument results. Now, adopting a technique requires studying its modalities and its conditions of use. In the USA, periodical studies of the variability make it possible to provide trading tolerances together with instrumental test results in order to limit the litigation event frequency. Apply USA rules and measurement methods in Africa would lead to increased litigation risk if production conditions induce more variable cotton quality. For the first time in Africa, we have conducted a study of the variability of the technological characteristics of the fibers in eight countries of Western and Central Africa: Benin, Burkina-Faso, Cameroon, Chad, the Ivory-Coast, Mali, Senegal and Togo. During two seasons of production, we conducted an experiment with three types of fiber sampling: 1) eight samples per bale within 215 bales produced in 27 ginning mills, 2) one sample per bale from 4286 bales organized in lots of 200 consecutive bales during season 1 and of 100 consecutive bales in season 2 in the same ginning mills, 3) two samples per bale (one from the top, one from the bottom) from 817 bales organized in lots of twenty consecutive bales each week in five ginning mills during season 2. Then, samples from the 5318 sampled bales were analysed with Standardized Instruments for Testing Cotton (SITC) in a laboratory which respects international recommendations and required ambient air conditions. The statistical data analysis allowed us to evaluate the level of variability of each of the studied technological characteristics, within the bales and between the bales. A sampling and testing methodology using SITC is being proposed to achieve the classification of the different sorts of cotton produced in Western and Central Africa from precise and repeatable results abidden by the worldwide established trading rules. ; Grâce aux développements ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| Relation: | NNT: 2012MULH4771; tel-00718836; https://theses.hal.science/tel-00718836; https://theses.hal.science/tel-00718836/document; https://theses.hal.science/tel-00718836/file/2012MULH4771_these_ABOE.pdf |
| الاتاحة: | https://theses.hal.science/tel-00718836 https://theses.hal.science/tel-00718836/document https://theses.hal.science/tel-00718836/file/2012MULH4771_these_ABOE.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.80AD24D0 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |