97,635 results match your criteria Cellulose Chemistry And Technology[Journal]


Green synthesis and environmental application of iron-based nanomaterials and nanocomposite: A review.

Chemosphere 2020 Jun 28;259:127509. Epub 2020 Jun 28.

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India. Electronic address:

Green chemistry has been proven to be an efficient route for nanoparticle synthesis. Plant extract based green synthesis of various nanoparticles is extensively studied since the last decade. This paper "Green synthesis and environmental application of Iron-based nanomaterials and nanocomposite: A review" unveils all the possible greener techniques for the synthesis of iron-based nanoparticles and nanocomposites. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127509DOI Listing

Kraft lignin fractionation by organic solvents: Correlation between molar mass and higher heating value.

Bioresour Technol 2020 Jul 2;314:123757. Epub 2020 Jul 2.

Science and Technology Center for Sustainability - CCTS, Federal University of São Carlos, Rodovia João Leme dos Santos, Km 110 -Sorocaba, SP, Brazil. Electronic address:

The new concept of integrated biorefineries has significantly changed pulp and paper industries. Lignin, which until then was only burned to generate energy, is now an important raw material for new products production. Kraft lignin (KL) fractions obtained by sequential fractionation with five organic solvents. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123757DOI Listing

Cellulose-based colorimetric sensor with N, S sites for Ag detection.

Int J Biol Macromol 2020 Jul 6. Epub 2020 Jul 6.

College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, China. Electronic address:

A novel cellulose-based colorimetric sensor (DAC-Tu) with N, S sites for Ag was prepared. The DAC-Tu exhibited excellent selectivity and sensitivity for Ag with a naked eyes color change from white to black in mixed metal ions aqueous solutions. The naked-eye in-situ detection limit of DAC-Tu for Ag was 10 mol/L within 10 min. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.018DOI Listing

Glycerol plasticisation of chitosan/carboxymethyl cellulose composites: Role of interactions in determining structure and properties.

Int J Biol Macromol 2020 Jul 6. Epub 2020 Jul 6.

International Institute for Nanocomposites Manufacturing (IINM), WMG, University of Warwick, Coventry CV4 7AL, United Kingdom. Electronic address:

Biopolymers such as chitosan and cellulose continue to attract much interest as they have many appealing characteristics such as biodegradability, biocompatibility, chemical versatility and natural functionality; however, many of their properties usually require further tailoring for specific purposes. This study shows that glycerol plasticisation and the addition of graphene oxide (GO) or reduced graphene oxide (rGO) altered the properties of chitosan and a chitosan/carboxymethyl cellulose (CMC) blend. For the chitosan/CMC matrix, GO or rGO was likely to disrupt polyelectrolyte complexation (PEC) between the two biopolymers, leading to weakened mechanical properties and increased surface hydrophilicity. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.004DOI Listing

A glucose binding lectin from Leucaena leucocephala seeds and its mitogenic activity against human lymphocytes.

Int J Biol Macromol 2020 Jul 6. Epub 2020 Jul 6.

Department of Biotechnology, University of Calicut, Kerala 673635, India.

Lectins are a specialized group of proteins with immense biological properties and applications. This study describes the purification and characterization of a lectin from Leucaena leucocephala seeds, a plant belonging to the Fabaceae family. Leucaena leucocephala lectin (LLL) was purified by a two-step purification method involving DEAE-cellulose anion exchange chromatography and Sephadex G-75 size exclusion chromatography. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.025DOI Listing

Smart Ti3C2Tx MXene Fabric with Fast Humidity Response and Joule Heating for Healthcare and Medical Therapy Applications.

ACS Nano 2020 Jul 9. Epub 2020 Jul 9.

An increasing utilization of flexible healthcare electronics and biomedicine-related therapeutic materials urges the development of multifunctional wearable/flexible smart fabrics for personal therapy and health management. However, it is currently of challenge to fabricate multifunctional and on-body healthcare electronic devices with reliable mechanical flexibility, excellent breathability and self-controllable joule heating effect. Here, we fabricate a multifunctional MXene-based smart fabric by depositing 2D Ti3C2Tx nanosheets onto cellulose fiber non-woven fabric via special MXene-cellulose fiber interactions. Read More

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http://dx.doi.org/10.1021/acsnano.0c03391DOI Listing

3D Bioprinting of Bone Marrow Mesenchymal Stem Cell-laden Silk Fibroin Double Network Scaffolds for Cartilage Tissue Repair.

Bioconjug Chem 2020 Jul 9. Epub 2020 Jul 9.

3D bioprinting is one of the latest trends in the regenerative medicine due to its capacity for constructing highly organized tissues with living cells. In this work, silk fibroin (SF) together with hydroxypropyl methyl cellulose (HPMC) was used to print bone marrow mesenchymal stem cell (BMSC) -laden double network (DN) hydrogel for cartilage tissue repair. The β-sheet structure formed among SF molecules was set as the rigid and brittle first network, while the crosslinking of HPMC-MA was set as the soft and ductile second network. Read More

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http://dx.doi.org/10.1021/acs.bioconjchem.0c00298DOI Listing

Unidimensional Approximation of the Diffuse Electrical Layer in the Inner Volume of Solid Electrolyte Grains in Absence of Background Ions.

Chemphyschem 2020 Jul 9. Epub 2020 Jul 9.

Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Laboratory for Catalytic Conversion of Renewable Resources, Akademgorodok 50/24, 660036, Krasnoyarsk, RUSSIAN FEDERATION.

In this paper we continue working on our theory of electrical double layers resulting exclusively from dissociation of a solid electrolyte, which we previously proposed as a medium for catalytic interaction between solid cellulose and solid acid catalysts of hydrolysis. Two theoretical unidimensional models of the inner grain volume are considered: an infinitely long cylindrical pore, and a gel electrolyte near a grain outer surface. Despite the model simplicity, the predictions for the cylindrical pore case are in semi-quantitative agreement with literature data on electroosmotic experiments, adequately explaining high proton selectivity of sulfonic membranes, and decline of such selectivity at high background acid concentration. Read More

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http://dx.doi.org/10.1002/cphc.202000455DOI Listing

Controlled preparation of interconnected 3D hierarchical porous carbons from bacterial cellulose-based composite monoliths for supercapacitors.

Nanoscale 2020 Jul 9. Epub 2020 Jul 9.

Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an, 710127, China. and Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan.

The controlled design and synthesis of porous carbons with anticipated microstructures and morphologies, and a high specific surface area (SSA) have been focused on for supercapacitor development. Here, hierarchical porous carbons (HPCs) with an interconnected three-dimensional morphology derived from a natural-based bacterial cellulose (BC) composite have been successfully prepared by thermally induced phase separation of poly(ethylene-co-vinyl alcohol) (EVOH) and subsequent carbonization/activation. The SSA and porous architectures can be controlled by fine-tuning the preparation conditions such as the precursor morphology and structure, activator dosage and activation temperature, and the relationships between the super-capacitive properties and the SSA and pore size distribution have been further investigated. Read More

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http://dx.doi.org/10.1039/d0nr03591bDOI Listing

Hydroxyethylcellulose as a methotrexate carrier in anticancer therapy.

Invest New Drugs 2020 Jul 8. Epub 2020 Jul 8.

Department of Experimental Oncology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114, Wroclaw, Poland.

Clinical and experimental cancer therapy is multifaceted; one such facet is the use of drug carriers. Drug carriers are various nano- and macromolecules, e.g. Read More

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http://dx.doi.org/10.1007/s10637-020-00972-9DOI Listing

Co-assembling Polysaccharide Nanocrystals and Nanofibers for Robust Chiral Iridescent Films.

ACS Appl Mater Interfaces 2020 Jul 8. Epub 2020 Jul 8.

Assembling robust chiral biopolymer structures without compromising vivid optical iridescence is a grand challenge for biocomposite materials. Herein, we report a hierarchical nanocellulose nanostructures with a helicoidal organization co-assembled from chiral rigid cellulose nanocrystals (CNC) and amorphous longer nanofibers isolated from the hydrolyzed wood pulp. This resulting highly iridescent chiral nanocellulose material are much tougher than traditional chiral CNC films. Read More

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http://dx.doi.org/10.1021/acsami.0c08571DOI Listing

Simple and environmentally friendly preparation of cellulose hydrogels using an ionic liquid.

Carbohydr Res 2020 Jun 7;494:108054. Epub 2020 Jun 7.

Graduate School of Environmental Engineering for Symbiosis, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo, 192-8577, Japan. Electronic address:

In this study, we developed an easy process for the production of cellulose hydrogels over a wide concentration range by using an ionic liquid/DMSO mixed solution that can easily be recycled at room temperature and has low environmental impact. Cellulose was completely dissolved at 6 to 20 wt% with respect to the [BMIm][OAc]/DMSO mixed solution at room temperature and ambient pressure. Placing the cellulose solution in a mold and immersing it in deionized water caused solvent replacement of the [BMIm][OAc]/DMSO mixed solution with deionized water, making it easy to obtain a cellulose hydrogel without using a crosslinking agent. Read More

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http://dx.doi.org/10.1016/j.carres.2020.108054DOI Listing

Isolation and characterization of nanocellulose crystals via acid hydrolysis from agricultural waste-tea stalk.

Int J Biol Macromol 2020 Jul 5. Epub 2020 Jul 5.

Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, PR China. Electronic address:

Nanocellulose crystals (NCCs) were successfully prepared via acid hydrolysis from an abundant agricultural waste (tea stalk) in China. The effective factors for NCC yield were modeled by the response surface methodology (RSM). The RSM determined the reaction conditions (HSO concentration, hydrolysis temperature, and reaction time) that optimized the yield of tea stalk NCCs (TNCCs). Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.009DOI Listing

Hydrogen Sulfide Promotes Hypocotyl Elongation via Increasing Cellulose Content and Changing Cellulose Fibrils Arrangement in Alfalfa.

J Exp Bot 2020 Jul 8. Epub 2020 Jul 8.

School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, China.

Hydrogen sulfide (H2S) displays a positive physiological function in plant growth. Limited data are available on the influence of H2S on cell wall growth in plants. Here, we outline a novel mechanism to show how H2S regulates cell wall cellulose biosynthesis and deposition in Alfalfa. Read More

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http://dx.doi.org/10.1093/jxb/eraa318DOI Listing

Characterization of two family AA9 LPMOs from Aspergillus tamarii with distinct activities on xyloglucan reveals structural differences linked to cleavage specificity.

PLoS One 2020 8;15(7):e0235642. Epub 2020 Jul 8.

Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway.

Aspergillus tamarii grows abundantly in naturally composting waste fibers of the textile industry and has a great potential in biomass decomposition. Amongst the key (hemi)cellulose-active enzymes in the secretomes of biomass-degrading fungi are the lytic polysaccharide monooxygenases (LPMOs). By catalyzing oxidative cleavage of glycoside bonds, LPMOs promote the activity of other lignocellulose-degrading enzymes. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0235642PLOS

A solution blown superporous nonwoven hydrogel based on hydroxypropyl cellulose.

Soft Matter 2020 Jul 8. Epub 2020 Jul 8.

Fibre Development, Department of Chemistry, Biomaterials and Textiles, RISE IVF, Sweden. and Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Sweden.

A superporous hydrogel - in which the interconnecting fibres themselves are hydrogels - based on hydroxypropyl cellulose (HPC) has been produced using the nonwoven solution blown technique. The nonwoven fibres were subsequently thermally crosslinked with citric acid as identified by esterbond formation using FT-IR spectroscopy. The gel fraction was approximately 70%. Read More

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http://dx.doi.org/10.1039/d0sm00724bDOI Listing

Sustainable Wood-Based Hierarchical Solar Steam Generator: A Biomimetic Design with Reduced Vaporization Enthalpy of Water.

Nano Lett 2020 Jul 8. Epub 2020 Jul 8.

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials & Chemistry, University of Science and Technology of China, Hefei 230026, China.

Water purification by solar distillation is considered a promising technology for producing clean water from undrinkable water resources. A solar steam generator is a central part of a solar distillation process to separate water and contaminants. Here, we report an efficient and sustainable hierarchical solar steam generator (HSSG) with reduced vaporization enthalpy based on bacterial cellulose (BC) nanocomposites. Read More

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http://dx.doi.org/10.1021/acs.nanolett.0c01088DOI Listing

Natural Celluloses as Catalysts in Dehydrogenation of NaBH in Methanol for H Production.

ACS Omega 2020 Jun 15;5(25):15519-15528. Epub 2020 Jun 15.

Department of Chemistry & Nanoscience and Technology Research and Application Center, Canakkale Onsekiz Mart University Terzioglu Campus, 17100 Canakkale, Turkey.

Cellulose, the most abundant renewable biopolymer, exists in many forms, such as microgranular cellulose (MGCell), sigmacell cellulose (SCell), cellulose fibers (FCell), and α-cellulose (AlfaCell). Several of these cellulose forms were protonated with an amine-containing agent polyethyleneimine (PEI), and the modified celluloses (XCell-PEI) were studied as catalysts in methanolysis of NaBH for hydrogen (H) generation. It was found that the SCell-PEI-catalyzed reaction is the fastest one among the modified celluloses with a hydrogen generation rate of 5520 ± 119 mL H/(g of catalyst × min). Read More

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http://dx.doi.org/10.1021/acsomega.0c01653DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331048PMC

Effect of Crystallinity on Water Vapor Sorption, Diffusion, and Permeation of PLA-Based Nanocomposites.

ACS Omega 2020 Jun 18;5(25):15362-15369. Epub 2020 Jun 18.

Alma Mater Studiorum, Università degli Studi di Bologna Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali (DICAM) Laboratori Ing., Chimica Via Terracini 34, 40131 Bologna, Italy.

The effects of crystalline morphology and presence of nanoparticles such as cellulose nanofibers (CNFs), organically modified nanoclay (C30B), or a combination of both on water vapor sorption and diffusion in polylactide (PLA) were evaluated by a quartz spring microbalance (QSM). It was found that the large spherulite size induced by high-temperature processing leads to an increase in water sorption and a substantial reduction of diffusion with increasing crystallinity. Contrarily, small-sized spherulites, arising after low-temperature processing during solvent-casting, showed a different behavior with a slight decrease in both water vapor sorption and diffusion with increasing crystallinity. Read More

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http://dx.doi.org/10.1021/acsomega.0c01468DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331067PMC

(4)-Morpholinothiosemicarbazide-Modified Cellulose: Synthesis, Structure, Kinetics, Thermodynamics, and Ni(II) Removal Studies.

ACS Omega 2020 Jun 19;5(25):15229-15239. Epub 2020 Jun 19.

Faculty of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City 700000 Vietnam.

In this study, cellulose extracted from straw was modified using (4)-morpholinothiosemicarbazide to generate a novel adsorbent as a chelate-complex-based material. The effects of pH, time, temperature, and mass ratios of KIO: cellulose on the yield of the oxidation were analyzed using iodometric titration and photometric methods. The accuracy and precision of the above two methods were evaluated using Student and Fisher statistical distribution. Read More

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http://dx.doi.org/10.1021/acsomega.0c01234DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331069PMC

Data of preparation and evaluation of supramolecular hydrogel based on cellulose for sustained release of therapeutic substances with antimicrobial and wound healing properties.

Data Brief 2020 Aug 21;31:105902. Epub 2020 Jun 21.

Bio & NanoMaterials Lab, Drug Delivery and Controlled Release, Universidad de Talca, Talca 3460000, Maule, Chile.

The data article refers to the paper "supramolecular hydrogel based on cellulose for sustained release of therapeutic substances with antimicrobial and wound healing properties"[1]. The dataset includes the synthesis and characterization of (E)-1,3-bis(4-(allyloxy)phenyl)prop‑2-en-1-one (3) (crosslinking agent). Moreover, the multiwall carbon nanotubes (MWCNTs) synthesis and functionalization (MWCNTs-COOH) are described. Read More

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http://dx.doi.org/10.1016/j.dib.2020.105902DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7330148PMC

Enhanced intestinal lymphatic absorption of saquinavir through supersaturated self-microemulsifying drug delivery systems.

Asian J Pharm Sci 2020 May 14;15(3):336-346. Epub 2019 Feb 14.

College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea.

The therapeutic potential of saquinavir, a specific inhibitor of human immunodeficiency virus (HIV)-1 and HIV-2 protease enzymes, has been largely limited because of a low solubility and consequnt low bioavailability. Thus, we aimed to design a supersaturated self-microemulsifying drug delivery system (S-SMEDDS) that can maintain a high concentration of saquinavir in gastro-intestinal fluid thorugh inhibiting the drug precipitation to enhance the lymphatic transport of saquinavir and to increase the bioavailability of saquinavir considerably. Solubilizing capacity of different oils, surfactants, and cosurfactants for saquinavir was evaluated to select optimal ingredients for preparation of SMEDDS. Read More

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http://dx.doi.org/10.1016/j.ajps.2018.11.009DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7327769PMC

Deconstruction of biomass enabled by local demixing of cosolvents at cellulose and lignin surfaces.

Proc Natl Acad Sci U S A 2020 Jul 7. Epub 2020 Jul 7.

UT/ORNL Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, TN 37830;

A particularly promising approach to deconstructing and fractionating lignocellulosic biomass to produce green renewable fuels and high-value chemicals pretreats the biomass with organic solvents in aqueous solution. Here, neutron scattering and molecular-dynamics simulations reveal the temperature-dependent morphological changes in poplar wood biomass during tetrahydrofuran (THF):water pretreatment and provide a mechanism by which the solvent components drive efficient biomass breakdown. Whereas lignin dissociates over a wide temperature range (>25 °C) cellulose disruption occurs only above 150 °C. Read More

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http://dx.doi.org/10.1073/pnas.1922883117DOI Listing

A Simplified Method of Synthesis to Obtain Zwitterionic Cellulose under Mild Conditions with Active Ionic Moieties.

Molecules 2020 Jul 5;25(13). Epub 2020 Jul 5.

Department of Wood, Cellulose and Paper, CUCEI, University of Guadalajara, 45020 Guadalajara, Jalisco, Mexico.

A simplified procedure to synthesize zwitterionic cellulose by means of N-protected aspartic anhydride under mild conditions was developed. The preparation of modified cellulose samples was carried out under heterogeneous, aqueous conditions by reacting NHOH-activated cellulose with aspartic anhydrides N-protected with trifluoroacetyl (TFAc) and carbobenzyloxy (Cbz). Modified cellulose samples Cel-Asp-N-TFAc and Cel-Asp-N-Cbz were characterized by Fourier Transform Infrared (FTIR) and C solid state Nuclear Magnetic Resonance (NMR) spectroscopy. Read More

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http://dx.doi.org/10.3390/molecules25133065DOI Listing

Conversion of indomethacin nanosuspensions into solid dosage forms via fluid bed granulation and compaction.

Eur J Pharm Biopharm 2020 Jul 4. Epub 2020 Jul 4.

Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstraße 48, 48149 Münster, Germany. Electronic address:

Preparation of pharmaceutical nanosuspensions is a popular technique to increase the dissolution velocity of poorly water-soluble drugs. Subsequent drying into a compaction-ready powder or granule is a critical process due to possible adverse solid characteristics and the risk of growth of nanoparticles. This work evaluated the drying of nanosuspensions via fluid bed granulation with focus on the binder selection and used concentrations, as well as the parameters spray rate and atomization pressure. Read More

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http://dx.doi.org/10.1016/j.ejpb.2020.06.020DOI Listing

Heterologous expression of lytic polysaccharide monooxygenases (LPMOs). A mini-review.

Biotechnol Adv 2020 Jul 4:107583. Epub 2020 Jul 4.

Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås 1430, Norway. Electronic address:

Lytic polysaccharide monooxygenases (LPMOs) are relatively new enzymes that have been discovered 10 years ago. LPMOs comprise a diverse group of enzymes which play a pivotal role in the depolymerization of sugar-based biopolymers including cellulose, hemicellulose, chitin, and starch. Their mechanism of action relies on the correct coordination of a copper ion in the active site, which is partly composed of the N-terminal histidine. Read More

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http://dx.doi.org/10.1016/j.biotechadv.2020.107583DOI Listing

Synthesis of grafted nano-fibrillated cellulose-based hydrogel and study of its thermodynamic, kinetic, and electronic properties.

J Agric Food Chem 2020 Jul 7. Epub 2020 Jul 7.

Hydrogels synthesized by a copolymerization reaction of nano-fibrillated cellulose (CNF) with acrylic acid (AA) and acrylamide (AM) and N,N-methylene-bis-acrylamide (MBA) as a cross-linker and its absorption performance as a function of composition was determined. Hydrogels with 4% by weight CNF had swelling of about 250 g/g and 7% CNR about 200 g/g for both water and saline solution. Thermodynamic and kinetic studies of the reaction pathways and the electronic properties of the cellulose and monomers were investigated through density functional theory (DFT) calculations. Read More

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http://dx.doi.org/10.1021/acs.jafc.0c03500DOI Listing

Long-term in vivo integrity and safety of 3D-bioprinted cartilaginous constructs.

J Biomed Mater Res B Appl Biomater 2020 Jul 6. Epub 2020 Jul 6.

Department of Plastic Surgery, Sahlgrenska University Hospital, University of Gothenburg, The Sahlgrenska Academy, Institute of Clinical Sciences, Göteborg, Sweden.

Long-term stability and biological safety are crucial for translation of 3D-bioprinting technology into clinical applications. Here, we addressed the long-term safety and stability issues associated with 3D-bioprinted constructs comprising a cellulose scaffold and human cells (chondrocytes and stem cells) over a period of 10 months in nude mice. Our findings showed that increasing unconfined compression strength over time significantly improved the mechanical stability of the cell-containing constructs relative to cell-free scaffolds. Read More

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http://dx.doi.org/10.1002/jbm.b.34687DOI Listing

Efficient System Wide Metabolic Pathway Comparisons in Multiple Microbes Using Genome to KEGG Orthology (G2KO) Pipeline Tool.

Interdiscip Sci 2020 Jul 6. Epub 2020 Jul 6.

School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh, 175005, India.

Comparison of system-wide metabolic pathways among microbes provides valuable insights of organisms' metabolic capabilities that can further assist in rationally screening organisms in silico for various applications. In this work, we present a much needed, efficient and user-friendly Genome to KEGG Orthology (G2KO) pipeline tool that facilitates efficient comparison of system wide metabolic networks of multiple organisms simultaneously. The optimized strategy primarily involves automatic retrieval of the KEGG Orthology (KO) identifiers of user defined organisms from the KEGG database followed by overlaying and visualization of the metabolic genes using the KEGG Mapper reconstruct pathway tool. Read More

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http://dx.doi.org/10.1007/s12539-020-00375-7DOI Listing

Cellulose mini-membranes modified with TiO for separation, determination, and speciation of arsenates and selenites.

Mikrochim Acta 2020 Jul 6;187(8):430. Epub 2020 Jul 6.

Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950, Wrocław, Poland.

Sorptive and selective mini-membranes based on TiO directly synthesized onto cellulose filters (TiO@cellulose) have been developed. The in situ synthesis of TiO@cellulose applied is simple and economically advantageous. The obtained membranes can be useful for (1) separating arsenic(V) and selenium(IV) from other ions and organic matter, (2) speciation of arsenic and selenium, and (3) determining ulratraces of these ions in water samples. Read More

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http://dx.doi.org/10.1007/s00604-020-04387-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7338822PMC

Improvement in the Oral Bioavailability and Efficacy of New Ezetimibe Formulations-Comparative Study of a Solid Dispersion and Different Micellar Systems.

Pharmaceutics 2020 Jul 2;12(7). Epub 2020 Jul 2.

Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain.

Ezetimibe (EZ) is a poorly water-soluble drug with low bioavailability. Strategies such as solid dispersions (SD) and micellar systems (MS) were developed to identify the most effective drug delivery formulations with the highest oral bioavailability, and to improve their lipid-lowering effect. The EZ formulations were prepared with different proportions of Kolliphor RH40 as a surfactant (1:0. Read More

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http://dx.doi.org/10.3390/pharmaceutics12070617DOI Listing

Bacterial Cellulose Nanocomposites: Morphology and Mechanical Properties.

Materials (Basel) 2020 Jun 25;13(12). Epub 2020 Jun 25.

Department of Food and Food Biotechnology, Omsk State Agrarian University, 644008 Omsk, Russia.

Bacterial cellulose (BC) is a promising material for biomedical applications due to its unique properties such as high mechanical strength and biocompatibility. This article describes the microbiological synthesis, modification, and characterization of the obtained BC-nanocomposites originating from symbiotic consortium . Two BC-modifications have been obtained: BC-Ag and BC-calcium phosphate (BC-Ca(PO)). Read More

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http://dx.doi.org/10.3390/ma13122849DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345597PMC

Extraction of Microfibrillar Cellulose From Waste Paper by NaOH/Urethane Aqueous System and Its Utility in Removal of Lead from Contaminated Water.

Materials (Basel) 2020 Jun 25;13(12). Epub 2020 Jun 25.

Global Core Research Centre for Ships and Offshore Plants (GCRC-SOP), Pusan National University, Busan 46241, Korea.

Though recycling of waste paper is widely practiced but usually it is downgraded to lower valued recycled waste paper. Based on this concern, we report the development of novel NaOH/urethane aqueous system for extraction of microfibrillated cellulose from waste paper. The purity of so obtained microfibrillated cellulose (MFC) was evaluated by morphological tests using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and by evaluation of physicochemical properties using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Read More

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http://dx.doi.org/10.3390/ma13122850DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345829PMC

Cellulose Acetate Incorporating Organically Functionalized CeO NPs: Efficient Materials for UV Filtering Applications.

Materials (Basel) 2020 Jul 1;13(13). Epub 2020 Jul 1.

"Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, 41 A, Grigore Ghica Voda Alley, 700487 Iasi, Romania.

One of the major issues faced when constructing various materials incorporating inorganic nanoparticles (NPs) is aggregation leading to loss of their final activity. In our work, cellulose acetate (CA) has been used to serve as matrix for the synthesis of UV-shielding and transparent films containing various amounts (1-5 wt.%) of cerium oxide (CeO) NPs. Read More

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http://dx.doi.org/10.3390/ma13132955DOI Listing

A Core Flood and Microfluidics Investigation of Nanocellulose as a Chemical Additive to Water Flooding for EOR.

Nanomaterials (Basel) 2020 Jul 1;10(7). Epub 2020 Jul 1.

PoreLab Center of Excellence, Department of Geoscience and Petroleum, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway.

Cellulose nanocrystals (CNCs) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (T-CNFs) were tested as enhanced oil recovery (EOR) agents through core floods and microfluidic experiments. Both particles were mixed with low salinity water (LSW). The core floods were grouped into three parts based on the research objectives. Read More

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http://dx.doi.org/10.3390/nano10071296DOI Listing

The Impact of Composition and Morphology on Ionic Conductivity of Silk/Cellulose Bio-Composites Fabricated from Ionic Liquid and Varying Percentages of Coagulation Agents.

Int J Mol Sci 2020 Jun 30;21(13). Epub 2020 Jun 30.

Department of Chemistry, Rutgers University, Camden, NJ 08102, USA.

Blended biocomposites created from the electrostatic and hydrophobic interactions between polysaccharides and structural proteins exhibit useful and unique properties. However, engineering these biopolymers into applicable forms is challenging due to the coupling of the material's physicochemical properties to its morphology, and the undertaking that comes with controlling this. In this particular study, numerous properties of the silk and microcrystalline cellulose biocomposites blended using ionic liquid and regenerated with various coagulation agents were investigated. Read More

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http://dx.doi.org/10.3390/ijms21134695DOI Listing

Bio-Based Poly(butylene succinate)/Microcrystalline Cellulose/Nanofibrillated Cellulose-Based Sustainable Polymer Composites: Thermo-Mechanical and Biodegradation Studies.

Polymers (Basel) 2020 Jun 30;12(7). Epub 2020 Jun 30.

Latvian State Institute of Wood Chemistry, LV, 1006 Riga, Latvia.

Biodegradable polymer composites from renewable resources are the next-generation of wood-like materials and are crucial for the development of various industries to meet sustainability goals. Functional applications like packaging, medicine, automotive, construction and sustainable housing are just some that would greatly benefit. Some of the existing industries, like wood plastic composites, already encompass given examples but are dominated by fossil-based polymers that are unsustainable. Read More

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http://dx.doi.org/10.3390/polym12071472DOI Listing

Effect-Based Approach to Assess Nanostructured Cellulose Sponge Removal Efficacy of Zinc Ions from Seawater to Prevent Ecological Risks.

Nanomaterials (Basel) 2020 Jun 30;10(7). Epub 2020 Jun 30.

Department of Physical, Earth and Environmental Sciences and INSTM Local Unit, University of Siena, 53100 Siena, Italy.

To encourage the applicability of nano-adsorbent materials for heavy metal ion removal from seawater and limit any potential side effects for marine organisms, an ecotoxicological evaluation based on a biological effect-based approach is presented. ZnCl (10 mg L) contaminated artificial seawater (ASW) was treated with newly developed eco-friendly cellulose-based nanosponges (CNS) (1.25 g L for 2 h), and the cellular and tissue responses of marine mussel were measured before and after CNS treatment. Read More

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http://dx.doi.org/10.3390/nano10071283DOI Listing

Mechanical Integrity of Conductive Carbon-Black-Filled Aqueous Polymer Binder in Composite Electrode for Lithium-Ion Battery.

Polymers (Basel) 2020 Jun 30;12(7). Epub 2020 Jun 30.

Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China.

The mechanical stability of aqueous binder and conductive composites (BCC) is the basis of the long-term service of composite electrodes in advanced secondary batteries. To evaluate the stress evolution of BCC in composite electrodes during electrochemical operation, we established an electrochemical-mechanical model for multilayer spherical particles that consists of an active material and a solid-electrolyte-interface (SEI)-enclosed BCC. The lithium-diffusion-induced stress distribution was studied in detail by coupling the influence of SEI and the viscoelasticity of inorganic-filler-doped polymeric bonding material. Read More

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http://dx.doi.org/10.3390/polym12071460DOI Listing

Safety of low-substituted hydroxypropyl cellulose (L-HPC) to be used as a food additive in food supplements in tablet form.

EFSA J 2018 Jan 20;16(1):e05062. Epub 2018 Jan 20.

Low-substituted hydroxypropyl cellulose (L-HPC) is a low-substituted poly(hydroxypropyl) ether of cellulose. L-HPC is proposed for use as a food additive in food supplements in solid form (tablet), with a maximum use level of 20,000 mg/kg and a typical use level of 10,000 mg/kg. Exposure estimates to L-HPC from its proposed use were calculated for both typical and maximum use levels. Read More

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http://dx.doi.org/10.2903/j.efsa.2018.5062DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7009426PMC
January 2018

Re-evaluation of celluloses E 460(i), E 460(ii), E 461, E 462, E 463, E 464, E 465, E 466, E 468 and E 469 as food additives.

EFSA J 2018 Jan 16;16(1):e05047. Epub 2018 Jan 16.

Following a request from the European Commission, the EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) was asked to deliver a scientific opinion re-evaluating the safety of microcrystalline cellulose (E 460(i)), powdered cellulose (E 460(ii)), methyl cellulose (E 461), ethyl cellulose (E 462), hydroxypropyl cellulose (E 463), hydroxypropyl methyl cellulose (E 464), ethyl methyl cellulose (E 465), sodium carboxy methyl cellulose (E 466), enzymatically hydrolysed carboxy methyl cellulose (E 469) and cross-linked carboxy methyl cellulose (E 468) as food additives. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the Scientific Committee on Food (SCF) established an acceptable daily intake (ADI) 'not specified' for unmodified and modified celluloses. Celluloses are not absorbed and are excreted intact in the faeces; in addition, microcrystalline cellulose, powdered and modified celluloses could be fermented by the intestinal flora in animals and humans. Read More

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http://dx.doi.org/10.2903/j.efsa.2018.5047DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7009359PMC
January 2018

Safety of the proposed amendment of the specifications for microcrystalline cellulose (E 460(i)) as a food additive.

Authors:

EFSA J 2017 Feb 16;15(2):e04699. Epub 2017 Feb 16.

Following a request from the European Commission, the EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) provided a scientific opinion regarding the safety of an amendment of the specifications for the food additive microcrystalline cellulose (E 460(i)). The scope of the current application was to amend the solubility of the food additive to 'practically insoluble or insoluble in sodium hydroxide solution'. Currently, the existing EU specifications describe microcrystalline cellulose as 'slightly soluble in sodium hydroxide'. Read More

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http://dx.doi.org/10.2903/j.efsa.2017.4699DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7010068PMC
February 2017

Production of nanocellulose by enzymatic hydrolysis: Trends and challenges.

Eng Life Sci 2019 Apr 27;19(4):279-291. Epub 2019 Feb 27.

School of Chemistry Center of Technology Federal University of Rio de Janeiro Rio de Janeiro Brazil.

There is a great interest in increasing the levels of production of nanocellulose, either by adjusting production systems or by improving the raw material. Despite all the advantages and applications, nanocellulose still has a high cost compared to common fibers and to reverse this scenario the development of new, cheaper, and more efficient means of production is required. The market trend is to have an increase in the mass production of nanocellulose; there is a great expectation of world trade. Read More

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http://dx.doi.org/10.1002/elsc.201800158DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999516PMC

Bioaugmentation of anaerobic digesters treating lignocellulosic feedstock by enriched microbial consortia.

Eng Life Sci 2018 Jul 14;18(7):440-446. Epub 2018 May 14.

Department of Environmental Engineering Faculty of Civil Engineering Istanbul Technical University Istanbul Turkey.

Three different bioaugmentation cultures enriched from natural and engineered cellulolytic environments (cow and goat rumen, a biogas reactor digesting sorghum biomass) were compared for their enhancement potential on the anaerobic digestion of wheat straw. Methane yields were determined in batch tests using the Automatic Methane Potential Test System operated for 30 days under mesophilic conditions. All cultures had positive effects on substrate degradation, and higher methane yields were observed in the bioaugmented reactors compared to control reactors set up with standard inoculum. Read More

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http://dx.doi.org/10.1002/elsc.201700199DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999511PMC

Graphene oxide/silver nanohybrid: Optimization, antibacterial activity and its impregnation on bacterial cellulose as a potential wound dressing based on GO-Ag nanocomposite-coated BC.

Eng Life Sci 2018 May 6;18(5):298-307. Epub 2018 Mar 6.

Department of Life Science Engineering Faculty of New Sciences and Technologies University of Tehran Tehran Iran.

Recently, bacterial cellulose (BC) based wound dressing have raised significant interests in medical fields. However, to our best knowledge, it is apparent that the BC itself has no antibacterial activity. In this study, we optimized graphene oxide-silver (GO-Ag) nanohybrid synthesis using Response Surface Methodology and impregnate it to BC and carefully investigate their antibacterial activities against both the Gram-negative bacteria and the Gram-positive bacteria . Read More

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http://dx.doi.org/10.1002/elsc.201700138DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999449PMC

Lignocellulose degradation: An overview of fungi and fungal enzymes involved in lignocellulose degradation.

Eng Life Sci 2018 Nov 27;18(11):768-778. Epub 2018 Jun 27.

Department of Biochemical Engineering Faculty of Food Technology and Biotechnology University of Zagreb Zagreb Croatia.

This review aims to present current knowledge of the fungi involved in lignocellulose degradation with an overview of the various classes of lignocellulose-acting enzymes engaged in the pretreatment and saccharification step. Fungi have numerous applications and biotechnological potential for various industries including chemicals, fuel, pulp, and paper. The capability of fungi to degrade lignocellulose containing raw materials is due to their highly effective enzymatic system. Read More

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http://dx.doi.org/10.1002/elsc.201800039DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999254PMC
November 2018

Rosmarinic acid-loaded electrospun nanofibers: In vitro release kinetic study and bioactivity assessment.

Authors:
Elham Vatankhah

Eng Life Sci 2018 Oct 25;18(10):732-742. Epub 2018 Sep 25.

Department of Bio-systems Faculty of New Technologies Engineering Shahid Beheshti University Tehran Iran.

This study seeks to develop a nanofibrous matrix containing rosmarinic acid (RosA), an herbal non-steroidal anti-inflammatory and antioxidant drug with low water solubility, for drug delivery applications. Neat and two types of RosA-loaded cellulose acetate (CA) mats varying in the initial content of RosA were electrospun. Microstructure of nanofibers, chemistry and physical state of RosA in nanofibers, RosA loading efficiency and RosA release in acetate buffer were investigated. Read More

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http://dx.doi.org/10.1002/elsc.201800046DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999554PMC
October 2018

Optimization of cell culture-derived influenza A virus particles purification using sulfated cellulose membrane adsorbers.

Eng Life Sci 2018 Jan 16;18(1):29-39. Epub 2017 Oct 16.

Bioprocess Engineering Max Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany.

Downstream processing remains one of the biggest challenges in manufacturing of biologicals and vaccines. This work focuses on a Design of Experiments approach to understand factors influencing the performance of sulfated cellulose membrane adsorbers for the chromatographic purification of a cell culture-derived H1N1 influenza virus strain (A/Puerto Rico/8/34). Membranes with a medium ligand density together with low conductivity and a high virus titer in the feed stream resulted in optimum virus yields and low protein and DNA content in the product fraction. Read More

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http://dx.doi.org/10.1002/elsc.201700108DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999594PMC
January 2018

Ratiometric fluorescent l-arginine and l-asparagine biosensors based on the oxazine 170 perchlorate-ethyl cellulose membrane.

Eng Life Sci 2017 Aug 12;17(8):847-856. Epub 2017 Jun 12.

School of Chemical Engineering Chonnam National University Gwangju Republic of Korea.

Ratiometric fluorescent l-arginine (Arg) and l-asparagine (Asn) biosensors were developed using an oxazine 170 perchlorate (O17) ethyl cellulose (EC) membrane and the enzymes entrapped into the matrix of EC and hydrogel polyurethane. The sensing principles were based on the hydrolysis reactions of urea and l-Arg under the catalysis of the urease and arginase to produce ammonia in the case of an l-Arg-sensing membrane and also on the hydrolysis reaction of l-Asn under the catalysis of asparaginase in the case of an l-Asn-sensing membrane. The O17-EC membrane reacted with the ammonia produced from the hydrolysis reactions and changed the fluorescence intensities at = 565 and 625 nm. Read More

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http://dx.doi.org/10.1002/elsc.201700033DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999337PMC

Ultrasound-assisted swelling of bacterial cellulose.

Eng Life Sci 2017 Oct 3;17(10):1108-1117. Epub 2017 Aug 3.

Centre of Biological Engineering University of Minho Braga Portugal.

Bacterial cellulose (BC) was obtained by static cultivation using commercial BC gel from scoby. BC membranes (oven dried and freeze-dried) were swelled with 8% NaOH, in the absence and in the presence of ultrasound (US), for 30, 60, and 90 min. The influence of swelling conditions on both physico-chemical properties and molecules entrapment was evaluated. Read More

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http://dx.doi.org/10.1002/elsc.201700085DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999602PMC
October 2017