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Potthast A, Ahn K, Becker M, Eichinger T, Kostic M, Böhmdorfer S, Jeong MJ, Rosenau T. Acetylation of cellulose – Another pathway of natural cellulose aging during library storage of books and papers. Carbohydr Polym 2022; 287:119323. [DOI: 10.1016/j.carbpol.2022.119323] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 11/16/2022]
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Weishaupt R, Zünd JN, Heuberger L, Zuber F, Faccio G, Robotti F, Ferrari A, Fortunato G, Ren Q, Maniura‐Weber K, Guex AG. Antibacterial, Cytocompatible, Sustainably Sourced: Cellulose Membranes with Bifunctional Peptides for Advanced Wound Dressings. Adv Healthc Mater 2020; 9:e1901850. [PMID: 32159927 DOI: 10.1002/adhm.201901850] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/14/2020] [Accepted: 02/25/2020] [Indexed: 12/14/2022]
Abstract
Progressive antibiotic resistance is a serious condition adding to the challenges associated with skin wound treatment, and antibacterial wound dressings with alternatives to antibiotics are urgently needed. Cellulose-based membranes are increasingly considered as wound dressings, necessitating further functionalization steps. A bifunctional peptide, combining an antimicrobial peptide (AMP) and a cellulose binding peptide (CBP), is designed. AMPs affect bacteria via multiple modes of action, thereby reducing the evolutionary pressure selecting for antibiotic resistance. The bifunctional peptide is successfully immobilized on cellulose membranes of bacterial origin or electrospun fibers of plant-derived cellulose, with tight control over peptide concentrations (0.2 ± 0.1 to 4.6 ± 1.6 µg mm-2 ). With this approach, new materials with antibacterial activity against Staphylococcus aureus (log4 reduction) and Pseudomonas aeruginosa (log1 reduction) are developed. Furthermore, membranes are cytocompatible in cultures of human fibroblasts. Additionally, a cell adhesive CBP-RGD peptide is designed and immobilized on membranes, inducing a 2.2-fold increased cell spreading compared to pristine cellulose. The versatile concept provides a toolbox for the functionalization of cellulose membranes of different origins and architectures with a broad choice in peptides. Functionalization in tris-buffered saline avoids further purification steps, allowing for translational research and multiple applications outside the field of wound dressings.
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Affiliation(s)
- Ramon Weishaupt
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Janina N. Zünd
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Lukas Heuberger
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Flavia Zuber
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Greta Faccio
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Francesco Robotti
- Laboratory of Thermodynamics in Emerging TechnologiesDepartment of Mechanical and Process EngineeringETH Zurich Sonneggstrasse 3 Zurich 8092 Switzerland
| | - Aldo Ferrari
- EmpaSwiss Federal Laboratories for Material Science and TechnologiesLaboratory for Experimental Continuum Mechanics Überlandstrasse 129 Dübendorf 8600 Switzerland
| | - Giuseppino Fortunato
- EmpaSwiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biomimetic Membranes and Textiles Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Qun Ren
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Katharina Maniura‐Weber
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
| | - Anne Géraldine Guex
- Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biointerfaces Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
- EmpaSwiss Federal Laboratories for Materials Science and TechnologyLaboratory for Biomimetic Membranes and Textiles Lerchenfeldstrasse 5 St. Gallen 9014 Switzerland
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Comparable studies of two polysaccharides from leaves of Acanthopanax senticosus: Structure and antioxidation. Int J Biol Macromol 2020; 147:350-362. [DOI: 10.1016/j.ijbiomac.2019.12.244] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/02/2019] [Accepted: 12/27/2019] [Indexed: 01/29/2023]
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Audu IG, Brosse N, Winter H, Hoffmann A, Bremer M, Fischer S, Laborie MP. Acetyl Groups in Typha capensis: Fate of Acetates during Organosolv and Ionosolv Pulping. Polymers (Basel) 2018; 10:E619. [PMID: 30966652 PMCID: PMC6404047 DOI: 10.3390/polym10060619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 05/28/2018] [Accepted: 05/31/2018] [Indexed: 11/20/2022] Open
Abstract
During biomass fractionation, any native acetylation of lignin and heteropolysaccharide may affect the process and the resulting lignin structure. In this study, Typha capensis (TC) and its lignin isolated by milling (MWL), ionosolv (ILL) and organosolv (EOL) methods were investigated for acetyl group content using FT-Raman, ¹H NMR, 2D-NMR, back-titration, and Zemplén transesterification analytical methods. The study revealed that TC is a highly acetylated grass; extractive free TC (TCextr) and TC MWL exhibited similar values of acetyl content: 6 wt % and 8 wt % by Zemplén transesterification, respectively, and 11 wt % by back-titration. In contrast, lignin extracted from organosolv and [EMIm][OAc] pulping lost 80% of the original acetyl groups. With a high acetyl content in the natural state, TC could be an interesting raw material in biorefinery in which acetic acid could become an important by-product.
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Affiliation(s)
- Idi Guga Audu
- Chair of Forest Biomaterials, University of Freiburg, Werthmannstr. 6, 79085 Freiburg im Breisgau, Germany.
- Laboratoire d'Étude et de Recherche sur le Matériau Bois LERMAB, Faculty of Science and Technology, University of Lorraine, Boulevard des Aiguillettes, BP 70239, 54506 Vandœuvre lès Nancy CEDEX, France.
- Freiburg Materials Research Center (FMF), University of Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg im Breisgau, Germany.
- Institute of Plant and Wood Chemistry, Technische Universität Dresden, Pienner Straße 19, 01737 Tharandt, Germany.
| | - Nicolas Brosse
- Laboratoire d'Étude et de Recherche sur le Matériau Bois LERMAB, Faculty of Science and Technology, University of Lorraine, Boulevard des Aiguillettes, BP 70239, 54506 Vandœuvre lès Nancy CEDEX, France.
| | - Heiko Winter
- Chair of Forest Biomaterials, University of Freiburg, Werthmannstr. 6, 79085 Freiburg im Breisgau, Germany.
- Freiburg Materials Research Center (FMF), University of Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg im Breisgau, Germany.
| | - Anton Hoffmann
- Institute of Plant and Wood Chemistry, Technische Universität Dresden, Pienner Straße 19, 01737 Tharandt, Germany.
| | - Martina Bremer
- Institute of Plant and Wood Chemistry, Technische Universität Dresden, Pienner Straße 19, 01737 Tharandt, Germany.
| | - Steffen Fischer
- Institute of Plant and Wood Chemistry, Technische Universität Dresden, Pienner Straße 19, 01737 Tharandt, Germany.
| | - Marie-Pierre Laborie
- Chair of Forest Biomaterials, University of Freiburg, Werthmannstr. 6, 79085 Freiburg im Breisgau, Germany.
- Freiburg Materials Research Center (FMF), University of Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg im Breisgau, Germany.
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