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Dr. Noureddine Abidi
Fiber and Biopolymer Research Instutute, Department of Plant and Soil Science, Texas Tech University PO Box 45019 Lubbock, TX, 79403, USA

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0 Cellulose
0 Dissolution
0 smart textiles
0 functionalization
0 FTIR microspectroscopy

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Cellulose
Dissolution
FTIR microspectroscopy
functionalization

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Review
Published: 03 August 2021 in Molecules
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Synthetic dyes have become an integral part of many industries such as textiles, tannin and even food and pharmaceuticals. Industrial dye effluents from various dye utilizing industries are considered harmful to the environment and human health due to their intense color, toxicity and carcinogenic nature. To mitigate environmental and public health related issues, different techniques of dye remediation have been widely investigated. However, efficient and cost-effective methods of dye removal have not been fully established yet. This paper highlights and presents a review of recent literature on the utilization of the most widely available biopolymers, specifically, cellulose, chitin and chitosan-based products for dye removal. The focus has been limited to the three most widely explored technologies: adsorption, advanced oxidation processes and membrane filtration. Due to their high efficiency in dye removal coupled with environmental benignity, scalability, low cost and non-toxicity, biopolymer-based dye removal technologies have the potential to become sustainable alternatives for the remediation of industrial dye effluents as well as contaminated water bodies.

ACS Style

Rohan Dassanayake; Sanjit Acharya; Noureddine Abidi. Recent Advances in Biopolymer-Based Dye Removal Technologies. Molecules 2021, 26, 4697 .

AMA Style

Rohan Dassanayake, Sanjit Acharya, Noureddine Abidi. Recent Advances in Biopolymer-Based Dye Removal Technologies. Molecules. 2021; 26 (15):4697.

Chicago/Turabian Style

Rohan Dassanayake; Sanjit Acharya; Noureddine Abidi. 2021. "Recent Advances in Biopolymer-Based Dye Removal Technologies." Molecules 26, no. 15: 4697.

Journal article
Published: 26 July 2021 in Applied Spectroscopy Reviews
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Over the past few years, cellulose nanocrystals (CNCs), also known as nanocrystalline cellulose (NCCs), have received significant attention owing to their diverse spectrum of applications. CNCs are commonly considered in nanomedicine, the food industry, tissue engineering, energy and storage applications, paper and textile industry, polymeric composites, and bio-catalysis. Due to the versatility of CNCs and CNC-derived materials, there is increasing importance in characterizing their properties using spectroscopic techniques. These spectroscopic techniques include solid-state nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron (XPS) spectroscopy, and Raman spectroscopy. This review focuses on the characterization of CNCs and CNCs-derived materials using the aforementioned spectroscopic techniques. This review also discusses the background, experimental procedures, sample preparation, and spectral analysis methods used in these techniques.

ACS Style

Rohan S. Dassanayake; Niwanthi Dissanayake; Juan S. Fierro; Noureddine Abidi; Edward L. Quitevis; Kiran Boggavarappu; Vidura D. Thalangamaarachchige. Characterization of cellulose nanocrystals by current spectroscopic techniques. Applied Spectroscopy Reviews 2021, 1 -26.

AMA Style

Rohan S. Dassanayake, Niwanthi Dissanayake, Juan S. Fierro, Noureddine Abidi, Edward L. Quitevis, Kiran Boggavarappu, Vidura D. Thalangamaarachchige. Characterization of cellulose nanocrystals by current spectroscopic techniques. Applied Spectroscopy Reviews. 2021; ():1-26.

Chicago/Turabian Style

Rohan S. Dassanayake; Niwanthi Dissanayake; Juan S. Fierro; Noureddine Abidi; Edward L. Quitevis; Kiran Boggavarappu; Vidura D. Thalangamaarachchige. 2021. "Characterization of cellulose nanocrystals by current spectroscopic techniques." Applied Spectroscopy Reviews , no. : 1-26.

Original research
Published: 29 June 2021 in Cellulose
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In this study, alkali and alkaline earth metal chlorides with different cationic radii (LiCl, NaCl, and KCl, MgCl2, and CaCl2) were used to gain insight into the behavior of cellulose solutions in the presence of salts. The specific focus of the study was on the evaluation of the effect of salts’ addition on the sol–gel transition of the cellulose solutions and on their ability to form monoliths, as well as the evaluation of the morphology (e.g., specific surface area, pore characteristics, and microstructure) of aerocelluloses prepared from these solutions. The effect of the salt addition on the sol–gel transition of cellulose solutions was studied using rheology, and morphology of resultant aerogels was evaluated by scanning electron microscopy and Brunauer–Emmett–Teller analysis, while the salt influence on the aerocelluloses’ crystalline structure and thermal stability was evaluated using powder X-ray diffraction and thermogravimetric analysis, respectively. The study revealed that the effect of salts’ addition was dependent on the component ions and their concentration. The addition of salts in the amount below certain concentration limit significantly improved the ability of the cellulose solutions to form monoliths and reduced the sol–gel transition time. Salts of lower cationic radii had a greater effect on gelation. However, excessive amount of salts resulted in the formation of fragile monoliths or no formation of gels at all. Analysis of surface morphology demonstrated that the addition of salts resulted in a significant increase in porosity and specific surface area, with salts of lower cationic radii leading to aerogels with much larger (~ 1.5 and 1.6-fold for LiCl and MgCl2, respectively) specific surface area compared to aerocelluloses prepared with no added salt. Thus, by adding the appropriate salt into the cellulose solution prior to gelation, the properties of aerocelluloses that control material’s performance (specific surface area, density, and porosity) could be tailored for a specific application. Graphic abstract

ACS Style

Prakash Parajuli; Sanjit Acharya; Julia L. Shamshina; Noureddine Abidi. Tuning the morphological properties of cellulose aerogels: an investigation of salt-mediated preparation. Cellulose 2021, 28, 7559 -7577.

AMA Style

Prakash Parajuli, Sanjit Acharya, Julia L. Shamshina, Noureddine Abidi. Tuning the morphological properties of cellulose aerogels: an investigation of salt-mediated preparation. Cellulose. 2021; 28 (12):7559-7577.

Chicago/Turabian Style

Prakash Parajuli; Sanjit Acharya; Julia L. Shamshina; Noureddine Abidi. 2021. "Tuning the morphological properties of cellulose aerogels: an investigation of salt-mediated preparation." Cellulose 28, no. 12: 7559-7577.

Preprint content
Published: 06 April 2021
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In this study, alkali and alkaline earth metal chlorides with different cationic radii (LiCl, NaCl, and KCl, MgCl2, and CaCl2) were used to gain insight into the behavior of cellulose solutions in the presence of salts. The specific focus of the study was evaluation of the effect of salts’ addition on the sol-gel transition of the cellulose solutions and on their ability to form monoliths, as well as evaluation of the morphology (e.g., specific surface area, pore characteristics, and microstructure) of aerocelluloses prepared from these solutions. The effect of the salt addition on the sol-gel transition of cellulose solutions was studied using rheology, and morphology of resultant aerogels was evaluated by Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis, while the salt influence on the aerocelluloses’ crystalline structure and thermal stability was evaluated using powder X-Ray Diffraction (pXRD) and Thermogravimetric Analysis (TGA), respectively. The study revealed that the effect of salts’ addition was dependent on the component ions and their concentration. The addition of salts in the amount below certain concentration limit significantly improved the ability of the cellulose solutions to form monoliths and reduced the sol-gel transition time. Salts of lower cationic radii had a greater effect on gelation. However, excessive amount of salts resulted in the formation of fragile monoliths or no formation of gels at all. Analysis of surface morphology demonstrated that the addition of salts resulted in a significant increase in porosity and specific surface area, with salts of lower cationic radii leading to aerogels with much larger (~1.5 and 1.6-fold for LiCl and MgCl2, respectively) specific surface area compared to aerocelluloses prepared with no added salt. Thus, by adding the appropriate salt into the cellulose solution prior to gelation, the properties of aerocelluloses that control material’s performance (specific surface area, density, and porosity) could be tailored for a specific application.

ACS Style

Prakash Parajuli; Sanjit Acharya; Julia Shamshina; Noureddine Abidi. Tuning the Morphological Properties of Cellulose Aerogels: An Investigation of Salt-Mediated Preparation. 2021, 1 .

AMA Style

Prakash Parajuli, Sanjit Acharya, Julia Shamshina, Noureddine Abidi. Tuning the Morphological Properties of Cellulose Aerogels: An Investigation of Salt-Mediated Preparation. . 2021; ():1.

Chicago/Turabian Style

Prakash Parajuli; Sanjit Acharya; Julia Shamshina; Noureddine Abidi. 2021. "Tuning the Morphological Properties of Cellulose Aerogels: An Investigation of Salt-Mediated Preparation." , no. : 1.

Book chapter
Published: 26 March 2021 in Fundamentals of Natural Fibres and Textiles
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Cellulose is the most abundant natural polymer. It has a high industrial value for many applications including as textile fibres. Regenerated cellulose fibres (RCF) have the potential to couple versatility with safety, comfort, renewability and biodegradability, which can lead to production of green textile products with superior performance. This chapter focuses on regenerated cellulose fibres and presents an overview of two established industrial processes of RCF production, namely rayon and lyocell and Ioncell, an emerging process of RCF production. General properties of RCF obtained from different processes are discussed and compared. Finally, various methods of improvement of RCF production processes as well as RCF products are also presented and discussed.

ACS Style

Prakash Parajuli; Sanjit Acharya; Shaida Sultana Rumi; Tanjim Hossain; Noureddine Abidi. Regenerated cellulose in textiles: rayon, lyocell, modal and other fibres. Fundamentals of Natural Fibres and Textiles 2021, 87 -110.

AMA Style

Prakash Parajuli, Sanjit Acharya, Shaida Sultana Rumi, Tanjim Hossain, Noureddine Abidi. Regenerated cellulose in textiles: rayon, lyocell, modal and other fibres. Fundamentals of Natural Fibres and Textiles. 2021; ():87-110.

Chicago/Turabian Style

Prakash Parajuli; Sanjit Acharya; Shaida Sultana Rumi; Tanjim Hossain; Noureddine Abidi. 2021. "Regenerated cellulose in textiles: rayon, lyocell, modal and other fibres." Fundamentals of Natural Fibres and Textiles , no. : 87-110.

Book chapter
Published: 26 March 2021 in Antimicrobial Textiles from Natural Resources
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Textile materials are prone to microbial infections during production, storage and use. Microbes deteriorate the overall quality of textiles and create unnecessary problems. Recent technological advances allow the textile industry to produce multifunctional fabrics. An antimicrobial finish provides protection against problematic microbes, prevents loss of fabric properties, reduces odour and even avoids the transfer and spread of pathogenic microbes. However, the antimicrobial finish itself interferes with the textile quality and wearer comfort. Since textiles intensively interact with the skin, antimicrobial finishes may exert health risks and interfere with nonspecific defence mechanisms of the skin and nonpathogenic microflora. Therefore a balance has to be found between the antimicrobial efficacy, the textile quality and the potential risks. This chapter reports on existing antimicrobial agents for protective clothing, antimicrobial finishing techniques, evaluation of effectiveness and safety of antimicrobial finishing, problems associated with antimicrobial treatments, and regulations related to the chemical antimicrobial finishing.

ACS Style

Sumedha Liyanage; Prakash Parajuli; Tanjim Hossain; Harsh Chaudhari; Noureddine Abidi. Antimicrobials for protective clothing. Antimicrobial Textiles from Natural Resources 2021, 349 -376.

AMA Style

Sumedha Liyanage, Prakash Parajuli, Tanjim Hossain, Harsh Chaudhari, Noureddine Abidi. Antimicrobials for protective clothing. Antimicrobial Textiles from Natural Resources. 2021; ():349-376.

Chicago/Turabian Style

Sumedha Liyanage; Prakash Parajuli; Tanjim Hossain; Harsh Chaudhari; Noureddine Abidi. 2021. "Antimicrobials for protective clothing." Antimicrobial Textiles from Natural Resources , no. : 349-376.

Conference paper
Published: 26 February 2021 in Materials Today: Proceedings
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Cellulose is the most abundant, biopolymer on Earth. It has numerous applications in many industries and can be engineered into fibers, films, sponges, beads, and other cellulosic materials. Of special interest, cellulose aerogels with high surface area and better pore characteristics have attracted considerable attention due to their properties such as biodegradability, biocompatibility, etc. In this paper, we present two main applications of cellulose-based materials for CO2 absorption and dye removal. The current CO2 capture, storage, and utilization technologies include absorption, adsorption, membrane and cryogenic processes. Among those, the adsorption processes on solid adsorbents have been regarded as the most attractive technique due to their high CO2 sorption capacity, low cost, low energy, and reusability. In this regard, solid sorbents prepared from cellulose are promising because of their relative abundance, sustainability, biodegradability, non-toxicity, renewability, thermal stability and good sorption properties. Activated carbons possess high surface areas and low chemical reactivity, therefore, they have been widely used as adsorbents at low and ambient temperatures. Data for the CO2 capture by CO2-activated cellulose aerogels with enhanced surface area and microporosity showed 383% and 311% increase in CO2 absorption respectively at 0 °C and 25 °C. Furthermore, cationic functionalization of cellulose aerogels resulted in 99.6% removal of negatively charged dye molecules.

ACS Style

Noureddine Abidi. Cellulose macromolecule as a source for advanced materials preparation. Materials Today: Proceedings 2021, 45, 7473 -7476.

AMA Style

Noureddine Abidi. Cellulose macromolecule as a source for advanced materials preparation. Materials Today: Proceedings. 2021; 45 ():7473-7476.

Chicago/Turabian Style

Noureddine Abidi. 2021. "Cellulose macromolecule as a source for advanced materials preparation." Materials Today: Proceedings 45, no. : 7473-7476.

Review
Published: 04 February 2021 in Textile Research Journal
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Microplastic fibers, also known as microfibers, are the most abundant microplastic forms found in the environment. Microfibers are released in massive numbers from textile garments during home laundering via sewage effluents and/or sludge. This review presents and discusses the importance of synthetic textile-based microfibers as a source of microplastics. Studies focused on their release during laundering were reviewed, and factors affecting microfiber release from textiles and the putative role of wastewater treatment plants (WWTPs) as a pathway of their release in the environment were examined and discussed. Moreover, potential adverse effects of microfibers on marine and aquatic biota and human health were briefly reviewed. Studies show that thousands of microfibers are released from textile garments during laundering. Different factors, such as fabric type and detergent, impact the release of microfibers. However, a relatively smaller number of available studies and often conflicting findings among studies make it harder to establish definitive trends related to important factors contributing to the release of microfibers. Even though current WWTPs are highly effective in capturing microfibers, due to the presence of a massive number of microfibers in the influent, up to billions of fibers per day are released through effluent into the environment. There is a need to establish standardized protocols and procedures that can allow meaningful comparisons among studies to be performed.

ACS Style

Sanjit Acharya; Shaida S Rumi; Yang Hu; Noureddine Abidi. Microfibers from synthetic textiles as a major source of microplastics in the environment: A review. Textile Research Journal 2021, 1 .

AMA Style

Sanjit Acharya, Shaida S Rumi, Yang Hu, Noureddine Abidi. Microfibers from synthetic textiles as a major source of microplastics in the environment: A review. Textile Research Journal. 2021; ():1.

Chicago/Turabian Style

Sanjit Acharya; Shaida S Rumi; Yang Hu; Noureddine Abidi. 2021. "Microfibers from synthetic textiles as a major source of microplastics in the environment: A review." Textile Research Journal , no. : 1.

Original research
Published: 15 January 2021 in Cellulose
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The use of eco-friendly bioplastics has become a viable solution to reduce the accumulation of petrochemical products in the biosphere and to decrease microplastic contamination. In this study, we used low-quality cotton fibers that lack textile applications to prepare bioplastics. We dissolved cotton fibers in N,N-dimethylacetamide/lithium chloride (DMAc/LiCl) solvent system and converted cellulose solutions to strong, transparent, and flexible films through casting, gelation, regeneration, plasticization, and hot-pressing. Films were characterized using different analytical techniques to evaluate their physicochemical and mechanical properties. Compared to raw cotton cellulose, regenerated and hot-pressed cellulose films showed amorphous structures and excellent tensile characteristics. The physical and mechanical properties of cellulose films, such as deformation recovery, flexibility, homogeneity, elongation, and surface roughness, were significantly improved by means of plasticization and hot-pressing. Because glycerol plasticization increased the surface hydrophilicity of the films, plasma-induced surface grafting of oleic acid imparted hydrophobicity to cellulose films. This study presents a new avenue for using low-quality cotton fibers that are usually sold at a discounted price to produce value-added bioproducts for different applications. Graphic abstract

ACS Style

Shaida S. Rumi; Sumedha Liyanage; Noureddine Abidi. Conversion of low-quality cotton to bioplastics. Cellulose 2021, 28, 2021 -2038.

AMA Style

Shaida S. Rumi, Sumedha Liyanage, Noureddine Abidi. Conversion of low-quality cotton to bioplastics. Cellulose. 2021; 28 (4):2021-2038.

Chicago/Turabian Style

Shaida S. Rumi; Sumedha Liyanage; Noureddine Abidi. 2021. "Conversion of low-quality cotton to bioplastics." Cellulose 28, no. 4: 2021-2038.

Journal article
Published: 06 January 2021 in Fibers
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This study investigated the effect of acid hydrolysis of cellulose on its dissolution under mild conditions in ionic liquid, 1-butyl-3-methylimidazolium acetate/N,N-dimethylacetamide (BMIMAc/DMAc). Acid hydrolysis of high molecular weight (MW) cotton cellulose (DP > 4000) was carried out to produce hydrolyzed cotton (HC) samples for dissolution. The HC samples were characterized using gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA), and the dissolution process was monitored using polarized light microscopy (PLM). It was found that the drastic decrease of the MW of cellulose did not result in improvement of its dissolution at room temperature. As compared to original cotton cellulose, the high amount of undissolved fibers in HC solutions led to unstable rheological behavior of HC solutions. Agglomeration and inhomogeneous dispersion of HC, and increased crystallinity, in this case, likely made the diffusion of BMIMAc/DMAc more difficult to the inside of the polymeric network of cellulose at ambient temperature, thereby hindering the dissolution. However, increasing the temperature from room temperature to 35 °C and 55 °C, led to a significant improvement in cellulose dissolution. This phenomenon implies that reducing the MW of cellulose might not be able to improve its dissolution under certain conditions. During the dissolution process, the physical properties of cellulose including fiber aggregation status, solvent diffusivity, and cellulose crystallinity may play a critical role compared to the MW, while the MW may not be an important factor. This finding may help further understand the mechanism of cellulose dissolution and seek better strategies to dissolve cellulose under mild conditions for industrial applications.

ACS Style

Sanjit Acharya; Yang Hu; Noureddine Abidi. Cellulose Dissolution in Ionic Liquid under Mild Conditions: Effect of Hydrolysis and Temperature. Fibers 2021, 9, 5 .

AMA Style

Sanjit Acharya, Yang Hu, Noureddine Abidi. Cellulose Dissolution in Ionic Liquid under Mild Conditions: Effect of Hydrolysis and Temperature. Fibers. 2021; 9 (1):5.

Chicago/Turabian Style

Sanjit Acharya; Yang Hu; Noureddine Abidi. 2021. "Cellulose Dissolution in Ionic Liquid under Mild Conditions: Effect of Hydrolysis and Temperature." Fibers 9, no. 1: 5.

Preprint content
Published: 23 April 2020
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Cotton seed coat, which has a complex macromolecular composition, consists of cellulose, hemicellulose, lignin, pectin, and wax substances. The presence of seed coat fragments (SCFs) is a major problem in the textile industry because SCFs create weak points in the yarn and differences in dye uptake. The number of SCFs in the lint is cultivar-dependent. Understanding the amount and

ACS Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. 2020, 1 .

AMA Style

Sumedha Liyanage, Tanjim Hossain, Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. . 2020; ():1.

Chicago/Turabian Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. 2020. "FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat." , no. : 1.

Preprint content
Published: 23 April 2020
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Cotton seed coat, which has a complex macromolecular composition, consists of cellulose, hemicellulose, lignin, pectin, and wax substances. The presence of seed coat fragments (SCFs) is a major problem in the textile industry because SCFs create weak points in the yarn and differences in dye uptake. The number of SCFs in the lint is cultivar-dependent. Understanding the amount and

ACS Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. 2020, 1 .

AMA Style

Sumedha Liyanage, Tanjim Hossain, Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. . 2020; ():1.

Chicago/Turabian Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. 2020. "FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat." , no. : 1.

Preprint content
Published: 23 April 2020
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Cotton seed coat, which has a complex macromolecular composition, consists of cellulose, hemicellulose, lignin, pectin, and wax substances. The presence of seed coat fragments (SCFs) is a major problem in the textile industry because SCFs create weak points in the yarn and differences in dye uptake. The number of SCFs in the lint is cultivar-dependent. Understanding the amount and

ACS Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. 2020, 1 .

AMA Style

Sumedha Liyanage, Tanjim Hossain, Noureddine Abidi. FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat. . 2020; ():1.

Chicago/Turabian Style

Sumedha Liyanage; Tanjim Hossain; Noureddine Abidi. 2020. "FTIR microspectroscopy investigation of biomolecules distribution in cotton seed coat." , no. : 1.

Article
Published: 24 January 2020 in Journal of Polymer Science
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This study reports on a strategy of using sol–gel and supercritical drying techniques to prepare aerocellulose monoliths with enhanced specific surface area and porosity by adding NaCl particles into the cellulose solution. The addition of 5 wt% of NaCl particles led to increased specific surface area of aerocellulose monoliths (from 114 m2/g to 205 m2/g), as well as their porosity (by ~5%). The aerocellulose monoliths prepared by adding NaCl particles achieved improved porous characteristics, lightweight, lower crystallinity, and better thermal stability, as compared to the control. This study demonstrates the effectiveness of NaCl particles to tune the surface area and the pore characteristics, which provides a facile route to achieve enhanced surface area and improved pore characteristics of aerocellulose monoliths.

ACS Style

Prakash Parajuli; Sanjit Acharya; Yang Hu; Noureddine Abidi. Cellulose‐based monoliths with enhanced surface area and porosity. Journal of Polymer Science 2020, 137, 1 .

AMA Style

Prakash Parajuli, Sanjit Acharya, Yang Hu, Noureddine Abidi. Cellulose‐based monoliths with enhanced surface area and porosity. Journal of Polymer Science. 2020; 137 (34):1.

Chicago/Turabian Style

Prakash Parajuli; Sanjit Acharya; Yang Hu; Noureddine Abidi. 2020. "Cellulose‐based monoliths with enhanced surface area and porosity." Journal of Polymer Science 137, no. 34: 1.

Journal article
Published: 21 November 2019 in Applied Spectroscopy Reviews
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ACS Style

Sumedha Liyanage; Noureddine Abidi. Fourier transform infrared applications to investigate induced biochemical changes in liver. Applied Spectroscopy Reviews 2019, 55, 840 -872.

AMA Style

Sumedha Liyanage, Noureddine Abidi. Fourier transform infrared applications to investigate induced biochemical changes in liver. Applied Spectroscopy Reviews. 2019; 55 (9-10):840-872.

Chicago/Turabian Style

Sumedha Liyanage; Noureddine Abidi. 2019. "Fourier transform infrared applications to investigate induced biochemical changes in liver." Applied Spectroscopy Reviews 55, no. 9-10: 840-872.

Journal article
Published: 29 August 2019 in Fibers
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During cotton fibers development, important structural changes occur, which lead to cellulose deposition and organization in the secondary cell wall. Several studies have focused on the analysis of the cell wall extracts of cotton fibers to gain an understanding of the changes in carbohydrate profiles and to determine the changes in crystallinity, cellulosic and non-cellulosic compounds at various stages of the fiber cell wall development. In this research, thermogravimetric analysis (TGA) was used to study intact fibers harvested from two cotton genotypes. Cellulose macromolecules structural changes occurring during different developmental stages were studied. The results from TGA technique were in agreement with results from other analytical techniques, which indicates that TGA could be a great tool to investigate the onset of cellulose deposition and to evaluate the cell wall composition during fiber development. The results obtained in this study demonstrated that the initiation of the secondary cell wall is genotype-dependent.

ACS Style

Luis Cabrales; Noureddine Abidi. Kinetics of Cellulose Deposition in Developing Cotton Fibers Studied by Thermogravimetric Analysis. Fibers 2019, 7, 78 .

AMA Style

Luis Cabrales, Noureddine Abidi. Kinetics of Cellulose Deposition in Developing Cotton Fibers Studied by Thermogravimetric Analysis. Fibers. 2019; 7 (9):78.

Chicago/Turabian Style

Luis Cabrales; Noureddine Abidi. 2019. "Kinetics of Cellulose Deposition in Developing Cotton Fibers Studied by Thermogravimetric Analysis." Fibers 7, no. 9: 78.

Journal article
Published: 19 June 2019 in Fibers
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A cellulose-cadmium (Cd)-tellurium (TE) quantum dots (QDs) composite film was successfully synthesized by incorporating CdTe QDs onto a cellulose matrix derived from waste cotton linters. Cellulose-CdTe QDs composite film was characterized by field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The antibacterial activity of the prepared composite film was investigated using the multidrug-resistance (MTR) Staphylococcus aureus bacteria. In vitro antibacterial assays demonstrated that CdTe QDs composite film can efficiently inhibit biofilm formation. Our results showed that the cellulose-CdTe QDs composite film is a promising candidate for biomedical applications including wound dressing, medical instruments, burn treatments, implants, and other biotechnology fields.

ACS Style

Rohan S. Dassanayake; Poorna T. Wansapura; Phat Tran; Abdul Hamood; Noureddine Abidi. Cotton Cellulose-CdTe Quantum Dots Composite Films with Inhibition of Biofilm-Forming S. aureus. Fibers 2019, 7, 57 .

AMA Style

Rohan S. Dassanayake, Poorna T. Wansapura, Phat Tran, Abdul Hamood, Noureddine Abidi. Cotton Cellulose-CdTe Quantum Dots Composite Films with Inhibition of Biofilm-Forming S. aureus. Fibers. 2019; 7 (6):57.

Chicago/Turabian Style

Rohan S. Dassanayake; Poorna T. Wansapura; Phat Tran; Abdul Hamood; Noureddine Abidi. 2019. "Cotton Cellulose-CdTe Quantum Dots Composite Films with Inhibition of Biofilm-Forming S. aureus." Fibers 7, no. 6: 57.

Journal article
Published: 27 May 2019 in Carbohydrate Polymers
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During the past decade, ionic liquids (ILs) have attracted increasing attention as efficient, novel solvents for dissolving cellulose. In this study, 1-butyl-3-methylimdazolium methylphosphonate ([C4C1im][(OMe)(H)PO2]) was used in the dissolution of cotton cellulose and the role of 1-methylimidazole, 1-ethylimidazole, 1-propylimidazole, and 1-butylimidazole as co-solvents was investigated. The progress of the dissolution was monitored using polarized light microscopy (PLM) and the regenerated cellulose was characterized using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The effect of 1-alkylimidazoles as co-solvents in cellulose dissolution was examined in terms of the basicity (hydrogen-bond acceptor capability), conductivity, viscosity, and ionicity of the IL and IL/co-solvent mixtures. These studies showed that the addition of 1-alkylimidazole co-solvents enhances cellulose dissolution by the IL and that the role of these co-solvents is mainly to increase mass transport by reducing the viscosity of the mixtures.

ACS Style

Niwanthi Dissanayake; Vidura D. Thalangamaarachchige; Mahesh Thakurathi; Matthew Knight; Edward L. Quitevis; Noureddine Abidi. Dissolution of cotton cellulose in 1:1 mixtures of 1-butyl-3-methylimidazolium methylphosphonate and 1-alkylimidazole co-solvents. Carbohydrate Polymers 2019, 221, 63 -72.

AMA Style

Niwanthi Dissanayake, Vidura D. Thalangamaarachchige, Mahesh Thakurathi, Matthew Knight, Edward L. Quitevis, Noureddine Abidi. Dissolution of cotton cellulose in 1:1 mixtures of 1-butyl-3-methylimidazolium methylphosphonate and 1-alkylimidazole co-solvents. Carbohydrate Polymers. 2019; 221 ():63-72.

Chicago/Turabian Style

Niwanthi Dissanayake; Vidura D. Thalangamaarachchige; Mahesh Thakurathi; Matthew Knight; Edward L. Quitevis; Noureddine Abidi. 2019. "Dissolution of cotton cellulose in 1:1 mixtures of 1-butyl-3-methylimidazolium methylphosphonate and 1-alkylimidazole co-solvents." Carbohydrate Polymers 221, no. : 63-72.

Journal article
Published: 26 April 2019 in Vibrational Spectroscopy
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This study reports on the use of Fourier transform infrared (FTIR) microspectroscopy imaging to investigate biochemical changes occurring during C. elegans lifespan. C. elegans wild-type (N2) and the tub-1 mutant strain were cultured in agar plates. FTIR imaging was performed on single worms in transmission mode at day 8, 11, and 15. Principal component analysis was then performed to analyze the spectra acquired during C. elegans lifespan. The FTIR spectra were clustered in three groups corresponding to the spectra acquired from the worms at day 8, 11, and 15. The results showed major changes in lipids (vibration 1744 cm-1 assigned to C = O stretching) and proteins (vibrations 1648 cm-1 assigned to C = O stretching of amide I and 1548 cm-1 assigned to N-H bending and C-N stretching in amid II). The vibration assigned to glycogen around 1155 cm-1 was present in the spectra acquired at day 8 and 11 but the peak area decreased by 49.3% and 73.3% in the spectra acquired at day 15 respectively from WT(N2) and tub-1 mutant strain. Furthermore, PC-1 loadings as a function of wavenumbers show that the presence of the vibration 1698 cm-1, attributed to antiparallel β-sheet, could indicate the formation of lipofuscin. The results obtained demonstrate that FTIR imaging could be used as a tool to monitor biochemical changes during lifespan studies, which could bring additional information to our understanding of longevity.

ACS Style

Amal Bouyanfif; Sumedha Liyanage; Eric Hequet; Naima Moustaid-Moussa; Noureddine Abidi. Fourier transform infrared microspectroscopy detects biochemical changes during C. elegans lifespan. Vibrational Spectroscopy 2019, 102, 71 -78.

AMA Style

Amal Bouyanfif, Sumedha Liyanage, Eric Hequet, Naima Moustaid-Moussa, Noureddine Abidi. Fourier transform infrared microspectroscopy detects biochemical changes during C. elegans lifespan. Vibrational Spectroscopy. 2019; 102 ():71-78.

Chicago/Turabian Style

Amal Bouyanfif; Sumedha Liyanage; Eric Hequet; Naima Moustaid-Moussa; Noureddine Abidi. 2019. "Fourier transform infrared microspectroscopy detects biochemical changes during C. elegans lifespan." Vibrational Spectroscopy 102, no. : 71-78.

Journal article
Published: 23 March 2019 in Vibrational Spectroscopy
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Fourier transform infrared microspectroscopy (FTIR) is a promising method for the analysis of biological samples. Recent studies reported that FTIR imaging allows determination of the distribution of several biomolecules in a sample with no staining or extraction. In this study, FTIR was used to monitor biochemical changes in C. elegans nematodes cultured in nematode maintenance media (CeMM) without supplementation and with supplementation with either a long chain polyunsatured omega 3 fatty acid, eicosapentaenoic acid (EPA) or a saturated fatty acid, palmitic acid (PA) at 100 μM. EPA is an omega 3 fatty acid with documented health benefits while PA is generally consumed in diets. Worms were placed on BaF2 slides, and FTIR spectra were collected from single worms in transmission mode using a focal plane array detector. Principal component analysis grouped the FTIR spectra into three clusters corresponding to spectra of worms cultured with no supplementation, worms cultured with supplementation with EPA, and worms cultured with supplementation with PA. The major differences between the FTIR spectra reside in the vibrations corresponding to unsaturated fatty acids (3008 cm−1), lipids (2928, 2848, and 1744 cm−1), and proteins (1680, 1648, and 1515 cm−1). This indicates that supplementation with EPA or PA leads to biochemical alterations related to unsaturated fatty acids, lipids, and proteins. Furthermore, supplementing mutant strains (tub-1 and fat-3) CeMM with PA resulted in the appearance of the vibration 3008 cm−1, an increase in the intensity of the vibration 1744 cm−1, and a new vibration at 1632 cm−1, which is assigned to the amide I of β-pleated sheet component of proteins, in the spectra of tub-1 and fat-3 mutant strains. The results illustrated the potential use of FTIR alongside other techniques such as gas chromatography and staining techniques to investigate lipid metabolism and fat accumulation as well as induced changes in protein structures.

ACS Style

Amal Bouyanfif; Sumedha Liyanage; Eric Hequet; Naima Moustaid-Moussa; Noureddine Abidi. FTIR microspectroscopy reveals fatty acid-induced biochemical changes in C. elegans. Vibrational Spectroscopy 2019, 102, 8 -15.

AMA Style

Amal Bouyanfif, Sumedha Liyanage, Eric Hequet, Naima Moustaid-Moussa, Noureddine Abidi. FTIR microspectroscopy reveals fatty acid-induced biochemical changes in C. elegans. Vibrational Spectroscopy. 2019; 102 ():8-15.

Chicago/Turabian Style

Amal Bouyanfif; Sumedha Liyanage; Eric Hequet; Naima Moustaid-Moussa; Noureddine Abidi. 2019. "FTIR microspectroscopy reveals fatty acid-induced biochemical changes in C. elegans." Vibrational Spectroscopy 102, no. : 8-15.