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Santinon C, de Vargas Brião G, da Costa TB, de Moura Junior CF, Beppu MM, Vieira MGA. Development of quaternized agar-based materials for the coronavirus inactivation. Int J Biol Macromol 2024; 278:134865. [PMID: 39163951 DOI: 10.1016/j.ijbiomac.2024.134865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/13/2024] [Accepted: 08/17/2024] [Indexed: 08/22/2024]
Abstract
The COVID-19 pandemic has revealed weaknesses in healthcare systems and underscored the need for advanced antimicrobial materials. This study investigates the quaternization of agar, a seaweed-derived polysaccharide, and the development of electrospun membranes for air filtration in facemasks and biomedical applications. Using the betacoronavirus MHV-3 as a model, quaternized agar and membranes achieved a 90-99.99 % reduction in viral load, without associated cytotoxicity. The quaternization process reduced the viscosity of the solution from 1.19 ± 0.005 to 0.64 ± 0.005 Pa.s and consequently the electrospun fiber diameter ranged from 360 to 185 nm. Membranes synthesized based on polyvinyl alcohol and thermally cross-linked with citric acid exhibited lower water permeability. Avoiding organic solvents in the electrospinning technique ensured eco-friendly production. This approach offers a promising way to develop biocompatible and functional materials for healthcare and environmental applications.
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Affiliation(s)
- Caroline Santinon
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil
| | - Giani de Vargas Brião
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil
| | - Talles Barcelos da Costa
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil
| | - Celso Fidelis de Moura Junior
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil
| | - Marisa Masumi Beppu
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil
| | - Melissa Gurgel Adeodado Vieira
- Universidade Estadual de Campinas - School of Chemical Engineering, Albert Einstein Av, 500, 13083-852 Campinas, Brazil.
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2
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Santinon C, Beppu MM, Vieira MGA. Optimization of kappa-carrageenan cationization using experimental design for model-drug release and investigation of biological properties. Carbohydr Polym 2023; 308:120645. [PMID: 36813338 DOI: 10.1016/j.carbpol.2023.120645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/15/2023] [Accepted: 01/29/2023] [Indexed: 02/10/2023]
Abstract
Cationization is a promising chemical modification technique that improves properties by attaching permanent positive charges to the backbone of biopolymers. Carrageenan is a widely available and non-toxic polysaccharide, commonly used in food industry but with low solubility in cold water. We performed a central composite design experiment to check the parameters that most influence the degree of cationic substitution and the film solubility. Hydrophilic quaternary ammonium groups on the carrageenan backbone enhance interaction in drug delivery systems and create active surfaces. Statistical analysis indicated that within the studied range, only the molar ratio between the cationizing reagent and the repeating disaccharide unit of carrageenan had a significant effect. Optimized parameters using 0.086 g of sodium hydroxide and glycidyltrimethylammonium/disaccharide repeating unit of 6.83 achieved 65.47 % degree of substitution and 4.03 % solubility. Characterizations confirmed the effective incorporation of cationic groups into the commercial structure of carrageenan and thermal stability improvement of the derivatives.
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Affiliation(s)
- Caroline Santinon
- School of Chemical Engineering, University of Campinas - UNICAMP, Albert Einstein Av., 500, 13083-852 Campinas, SP, Brazil
| | - Marisa Masumi Beppu
- School of Chemical Engineering, University of Campinas - UNICAMP, Albert Einstein Av., 500, 13083-852 Campinas, SP, Brazil
| | - Melissa Gurgel Adeodato Vieira
- School of Chemical Engineering, University of Campinas - UNICAMP, Albert Einstein Av., 500, 13083-852 Campinas, SP, Brazil.
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3
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Veisi H, Varshosaz J, Rostami M, Mirian M. Thermosensitive TMPO-oxidized lignocellulose/cationic agarose hydrogel loaded with deferasirox nanoparticles for photothermal therapy in melanoma. Int J Biol Macromol 2023; 238:124126. [PMID: 36944379 DOI: 10.1016/j.ijbiomac.2023.124126] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/09/2023] [Accepted: 03/17/2023] [Indexed: 03/23/2023]
Abstract
Deferasirox (DFX) is an iron-chelating agent effective in treating various kinds of cancers, which inhibits iron metabolism in cancer cells. The recent study aimed to prepare an injectable thermosensitive hydrogel based on lignocellulose and agarose containing deferasirox-loaded polypyrrole nanoparticles for local drug delivery in a combined chemo-photothermal therapy by laser light irradiation. Polypyrrole nanoparticles containing DFX were made by the emulsification method and optimized. Thermosensitive hydrogels were prepared by quaternary ammonium substituted agarose and TMPO-oxidized lignocellulose at different ratios, and the optimal hydrogel was selected based on gelation time, gelation temperature, and injectability. DFX- loaded polypyrrole nanoparticles were then added to the hydrogel, and the drug release, rheology test, injectability, degradation, and swelling percent, as well as cytotoxicity, and photothermal properties, were studied on B16F10, human melanoma cells. The hydrogel with 2 % anionic lignocellulose and 0.5 % cationic agarose showed the shortest gelation time and the highest mechanical strength. It transferred from a liquid state at 4 °C into a semisolid form at 37 °C with a gelation time of 10.3 min. The nanoparticles loaded in hydrogel showed dose-dependent cytotoxicity. The cytotoxic dose of the drug was reduced by laser light irradiation.
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Affiliation(s)
- Hadis Veisi
- Novel Drug Delivery Systems Research Center, Department of Pharmaceutics, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Center, Department of Pharmaceutics, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Mahboubeh Rostami
- Department of Medicinal Chemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Mina Mirian
- Department of Biotechnology, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
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4
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Vrzoňová R, Čížová A, Račková L, Mečárová J, Bieliková S, Bystrický S. Molar-mass-dependent antibacterial activity of cationic dextran derivatives against resistant nosocomial pathogens. Int J Biol Macromol 2023; 235:123854. [PMID: 36858094 DOI: 10.1016/j.ijbiomac.2023.123854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023]
Abstract
The rise of various multidrug-resistant bacteria has created a need for new biocompatible and biodegradable antibacterial compounds. Cationic polysaccharides are promising candidates for this role. Therefore, cationic derivatives of commercial dextrans with molar masses of 11 kDa, 76 kDa, 411 kDa, and 1500-2500 kDa and various degrees of substitution (DSQ 0.34-0.52) were prepared and their antimicrobial properties against four gram-negative nosocomial bacteria were tested. As expected, a higher DSQ led to higher efficiency. The best antimicrobial properties were found for derivatives of 411 kDa, followed by 76 kDa and 1500-2000 kDa dextrans. This indicates that there is a certain optimum molar mass with the best antimicrobial properties. However, as molar mass increased, the biocompatibility of cationic dextran steadily decreased, with increased hemagglutination and toxicity being seen for human cells. The derivatives of 76 kDa dextran with higher DSQ (0.40-0.52) were the best antimicrobial agents suitable for further clinical testing.
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Affiliation(s)
- Romana Vrzoňová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | - Alžbeta Čížová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | - Lucia Račková
- Institute of Experimental Pharmacology and Toxicology, Centre of Experimental Medicine, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia.
| | - Jana Mečárová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | - Sandra Bieliková
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | - Slavomír Bystrický
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
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5
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Yu X, Wang L, He W. Cytophilic Agarose-Epoxide-Amine Cryogels Engineered with Granulated Microstructures. ACS APPLIED BIO MATERIALS 2023; 6:694-702. [PMID: 36695539 DOI: 10.1021/acsabm.2c00938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Inherent cytophobicity of agarose limits its direct use for the growth of anchorage-dependent cells. Here, we report a simple strategy allowing the development of agarose-based hydrogels entailed with both cytophilicity and microstructured morphology. Through the reaction of water-soluble 1,4-butanediol diglycidyl ether (BDDE) with trifunctional polyetheramine Jeffamine T403 in agarose solution followed by cryogelation of the mixtures, a series of macroporous agarose-epoxide-amine cryogels were prepared readily. Results from fluorescent labeling and energy-dispersive X-ray elemental mapping showed the formation of granulated microstructures in the cryogels. Such features closely correlated to the phase separation of BDDE-T403 polymers within the agarose matrix. Cytophilicity of the microstructured cryogels due to the integrated amine moieties was demonstrated through the adhesion of fibroblasts. Functional enrichment of the cryogels was further highlighted by leveraging the granulates as micro-reservoirs for polyphenol proanthocyanidin to enable antioxidation and protection of fibroblasts from H2O2-induced cytotoxic effect in vitro.
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Affiliation(s)
- Xueying Yu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning116024, China.,School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning116024, China
| | - Liwei Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning116024, China.,School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning116024, China
| | - Wei He
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning116024, China.,School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning116024, China
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6
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Hodaei M, Varshosaz J. Cationic Okra gum coated nanoliposomes as a pH-sensitive carrier for co-delivery of hesperetin and oxaliplatin in colorectal cancers. Pharm Dev Technol 2022; 27:773-784. [PMID: 36040153 DOI: 10.1080/10837450.2022.2119249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Oxaliplatin (OXP) is the typical treatment of colorectal cancer. Combining chemotherapeutic drugs can reduce drug resistance and side effects. In the present study, the co-delivery of OXP with Hesperetin (HSP), a natural anti-cancer flavonoid, by nanoliposomes was studied against HT-29 colon cancer cells. Cationic Okra gum (COG) was synthesized to coat nanoliposomes. The successful synthesis of COG was confirmed by NMR spectroscopy. Liposomes were prepared by thin film hydration technique. Formulations containing 0.5, 1 and 2 mg.ml-1 COG, had particle sizes ranging from 145 to 175 nm and zeta potentials for uncoated and coated formulations changed between -29 to -0.403 mV. Coated liposomes released 98% and 66% of HSP and OXP, respectively during 24 h pH-dependently. Cationic Okra gum enhanced physical stability of the liposomes for about 30 days. The composite liposomes containing OXP and HSP at final concentrations of 1.125 µM and 125 µM, respectively could generate significant cytotoxicity at 48 hours in comparison of each drug alone. Extracted drug-target interactions from STITCH database, showed that Catalase (CAT) is the common target between OXP and HSP drugs. Measurement of the CAT activity may be used as an indicator to investigate the mechanism of action of these drugs in subsequent experiments.
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Affiliation(s)
- Mahboobeh Hodaei
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
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7
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Chemical modifications in the structure of seaweed polysaccharides as a viable antimicrobial application: A current overview and future perspectives. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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8
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9
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Ribeiro FDOS, de Araújo GS, Mendes MGA, Daboit TC, Brito LM, Pessoa C, de Lima LRM, de Paula RCM, Bastos RS, Rocha JA, de Brito Sa E, de Oliveira TC, de Jesus Oliveira AC, Sobrinho JLS, de Souza de Almeida Leite JR, de Araújo AR, da Silva DA. Structural characterization, antifungal and cytotoxic profiles of quaternized heteropolysaccharide from Anadenanthera colubrina. Int J Biol Macromol 2020; 165:279-290. [DOI: 10.1016/j.ijbiomac.2020.09.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 09/11/2020] [Accepted: 09/13/2020] [Indexed: 12/17/2022]
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10
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Anti-staphylococcal activity of quaternized mannan from the yeast Candida albicans. Carbohydr Polym 2020; 240:116288. [PMID: 32475569 DOI: 10.1016/j.carbpol.2020.116288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/24/2020] [Accepted: 04/10/2020] [Indexed: 12/26/2022]
Abstract
Global increase of antibiotic-resistant pathogens as well as elevated content of drug residues in the foodstuffs and the environment urgently calls for new biocompatible antimicrobial biomaterials. Yeast mannans represent readily available source of biodegradable materials for tailor-made derivatives that could be effective in biomedical applications. Here, antimicrobial properties of quaternized mannans (DSQ 0.12, 0.24, 0.30, 0.62) from Candida albicans against clinical multi-resistant strains of Staphylococcus aureus are confronted with possible cytotoxicity against human cells. As expected, both effects increase with increasing degree of quaternization. However, it is possible to define the "window", at quaternized mannan with DSQ 0.30 with good anti-microbial effectiveness and low cytotoxicity. This derivative exhibit minimum inhibitory (MIC) and minimum bactericidal (MBC) concentration from 62.5 to 250 μg/mL and demonstrate good biofilm inhibition effect. Also acceptable values were obtained in hemagglutination and hemolytic activity assays and also in cytotoxicity tests on human fibroblasts.
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11
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de Sousa AK, Ribeiro FO, de Oliveira TM, de Araújo AR, Dias JDN, Albuquerque P, Silva-Pereira I, de Jesus Oliveira AC, Quelemes PV, Leite JR, da Silva DA. Quaternization of angico gum and evaluation of anti-staphylococcal effect and toxicity of their derivatives. Int J Biol Macromol 2020; 150:1175-1183. [DOI: 10.1016/j.ijbiomac.2019.10.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/08/2019] [Accepted: 10/14/2019] [Indexed: 11/26/2022]
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12
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Daglio Y, Rodríguez MC, Prado HJ, Matulewicz MC. Paramylon and synthesis of its ionic derivatives: Applications as pharmaceutical tablet disintegrants and as colloid flocculants. Carbohydr Res 2019; 484:107779. [PMID: 31445311 DOI: 10.1016/j.carres.2019.107779] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 08/13/2019] [Accepted: 08/15/2019] [Indexed: 11/19/2022]
Abstract
Paramylon, a high molecular weight polysaccharide, is a linear and unbranched (1 → 3)-β-d-glucan. Despite its numerous biological benefits, the poor aqueous solubility of crystalline paramylon is a drawback that has hampered some of its applications. In an effort to make this biomaterial amenable to practical uses, cationic and anionic paramylon derivatives were obtained. The degrees of substitution of both products were determined. The products were characterized by FT-IR spectrocopy, ESI mass spectrometry, 1H, 13C and 1H-13C NMR and SEM microscopy. These techniques confirmed the success of the substitution reactions. 1H NMR analysis was used to develop alternative methods for an approximate estimation of the degree of substitution. 1H-13C HSQC NMR spectra were assigned for both derivatives. New applications of native, cationic and anionic paramylon were found. Native paramylon showed similar performance as pharmaceutical tablet disintegrant than sodium croscarmellose. Cationic paramylon behavior as colloid flocculant was comparable with commercial cationic polyacrylamides. The anionic derivative could eventually be used in the formulation of matrix controlled release systems or as a suspending agent.
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Affiliation(s)
- Yasmín Daglio
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Ciudad Universitaria, 1428EGA, Buenos Aires, Argentina
| | - María C Rodríguez
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria-Pabellón 2, 1428EGA, Buenos Aires, Argentina
| | - Héctor J Prado
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Tecnología Farmacéutica II, Junín 956, 1113AAD, Buenos Aires, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Tecnología de Alimentos y Procesos Químicos (ITAPROQ), Ciudad Universitaria, 1428EGA, Buenos Aires, Argentina.
| | - María C Matulewicz
- Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Ciudad Universitaria, 1428EGA, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Ciudad Universitaria-Pabellón 2, 1428EGA, Buenos Aires, Argentina.
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13
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Willberg-Keyriläinen P, Pitkänen P, Hulkko J, Asikainen M, Setälä H. The effect of mixing and consistency on cellulose cationization. Heliyon 2019; 5:e01349. [PMID: 30937407 PMCID: PMC6426702 DOI: 10.1016/j.heliyon.2019.e01349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 11/27/2022] Open
Abstract
Traditional chemical modifications of cellulose are usually done at low or medium consistencies. Processing at high solids content is expected to provide a leap forward in reduction of manufacturing costs such as minimization of chemical use, energy consumption and decreasing processing equipment size, while at the same time increasing reaction efficiency. In this research, high consistency modifications of cellulose were studied through cationization reaction. Four different laboratory scale high consistency reactors were tested and the effect of mixing on fiber properties was analyzed. All reactors decreased cellulose fiber length and no significant difference between cellulose starting consistencies and mixing time on fiber properties were found. The cationization reaction efficiency increased as the cellulose starting consistency increased in all of the tested reactors. In addition, mercerization of pulp as pretreatment, significantly increased reaction efficiency.
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Affiliation(s)
| | - Pauliina Pitkänen
- VTT Technical Research Centre of Finland Ltd, Tietotie 4E, P.O Box 1000, FI-02044 VTT, Finland
| | - Janne Hulkko
- VTT Technical Research Centre of Finland Ltd, Tietotie 4E, P.O Box 1000, FI-02044 VTT, Finland
| | - Martta Asikainen
- VTT Technical Research Centre of Finland Ltd, Tietotie 4E, P.O Box 1000, FI-02044 VTT, Finland
| | - Harri Setälä
- VTT Technical Research Centre of Finland Ltd, Tietotie 4E, P.O Box 1000, FI-02044 VTT, Finland
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14
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Čížová A, Csomorová K, Rychlý J, Bystrický S. Stability of cationic and amphoteric derivatives of mannan from the yeast Candida albicans. Carbohydr Polym 2019; 207:440-446. [PMID: 30600027 DOI: 10.1016/j.carbpol.2018.11.101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 11/27/2022]
Abstract
Infection with Candida albicans can prove lethal in immuno-compromised patients. It is imperative to develop a vaccine against this common organism. The amphoteric derivatives of the mannan component of the Candida cell wall may present a prospective target for the development of such a vaccine; however, the radical processing by antigen-presenting cells of the immune system is not fully understood. In this work a set of tailor-made cationic and amphoteric derivatives of three different degrees of quaternization (DSQ 0.14-0.38) has been prepared by chemical modification of ultrasonically-treated mannan and three carboxymethylated mannan derivatives (DSCM 0.13-0.32). These were exposed to free-radical attack by OH, generated in situ by the Fenton reaction. Potential changes in composition, DSQ, and molar mass distribution due to free-radical degradation were monitored by elemental analysis, NMR and FTIR spectroscopies, and size exclusion chromatography. A protective effect of quaternization against OH degradation was found. Non-isothermal thermogravimetric analysis found that the thermal stability of this mannan was also improved by chemical modification.
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Affiliation(s)
- Alžbeta Čížová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia.
| | - Katarína Csomorová
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia.
| | - Jozef Rychlý
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia.
| | - Slavomír Bystrický
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia.
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15
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Venkataraman S, Lee ALZ, Tan JPK, Ng YC, Lin ALY, Yong JYK, Yi G, Zhang Y, Lim IJ, Phan TT, Yang YY. Functional cationic derivatives of starch as antimicrobial agents. Polym Chem 2019. [DOI: 10.1039/c8py00740c] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Antimicrobial polymers with a broad spectrum of action and high selectivity towards pathogens (versus mammalian cells) provide the opportunity to combat infections with only a limited chance of resistance development.
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Affiliation(s)
| | - Ashlynn L. Z. Lee
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Jeremy P. K. Tan
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Yi Chien Ng
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Amelia Lee Yi Lin
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Jaron Y. K. Yong
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Guangshun Yi
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Yugen Zhang
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | - Ivor J. Lim
- Department of Surgery
- Yong Loo Lin School of Medicine
- National University of Singapore
- Singapore 119228
- Singapore
| | - Thang T. Phan
- Department of Surgery
- Yong Loo Lin School of Medicine
- National University of Singapore
- Singapore 119228
- Singapore
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
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16
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Hou P, Yan Z, Cannon FS, Yue Y, Byrne T, Nieto-Delgado C. Enhancement of perchlorate removal from groundwater by cationic granular activated carbon: Effect of preparation protocol and surface properties. CHEMOSPHERE 2018; 201:756-763. [PMID: 29550569 DOI: 10.1016/j.chemosphere.2018.03.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 02/28/2018] [Accepted: 03/04/2018] [Indexed: 05/27/2023]
Abstract
In order to obtain a high adsorption capacity for perchlorate, the epoxide-forming quaternary ammonium (EQA) compounds were chemically bonded onto granular activated carbon (GAC) surface by cationic reaction. The optimum preparation condition of the cationic GAC was achieved while applying softwood-based Gran C as the parent GAC, dosing EQA first at a pH of 12, preparation time of 48 h, preparation temperature of 50 °C, and mole ratio of EQA/oxygen groups of 2.5. The most favorable cationic GAC that had the QUAB360 pre-anchored exhibited the highest perchlorate adsorption capacity of 24.7 mg/g, and presented the longest bed volumes (3000 BV) to 2 ppb breakthrough during rapid small scale column tests (RSSCTs), which was 150 times higher than that for the pristine Gran C. This was attributed to its higher nitrogen amount (1.53 At%) and higher positive surface charge (0.036 mmol/g) at pH 7.5. Also, there was no leaching of the quaternary ammonium detected in the effluent of the RSSCTs, indicating there was no secondary pollution occurring during the perchlorate removal process. Overall, this study provides an effective and environmental-friendly technology for improving GAC perchlorate adsorption capacity for groundwater treatment.
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Affiliation(s)
- Pin Hou
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China; Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Zhe Yan
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
| | - Fred S Cannon
- Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Ye Yue
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China
| | - Timothy Byrne
- Ingevity, 5255 Virginia Ave, North Charleston, SC 29406, United States
| | - Cesar Nieto-Delgado
- Environmental Science Division, Instituto Potosino de Investigaci_on Científica y Tecnol_ogica, IPICyT, Camino a La Presa San Jose 2055, San Luis Potosí, SLP 78216, Mexico
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Wan X, Guo C, Feng J, Yu T, Chai XS, Chen G, Xie WQ. Determination of the Degree of Substitution of Cationic Guar Gum by Headspace-Based Gas Chromatography during Its Synthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7012-7016. [PMID: 28749661 DOI: 10.1021/acs.jafc.7b03144] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study reports on a headspace-based gas chromatography (HS-GC) technique for determining the degree of substitution (DS) of cationic guar gum during the synthesis process. The method is based on the determination of 2,3-epoxypropyltrimethylammonium chloride in the process medium. After a modest pretreatment procedure, the sample was added to a headspace vial containing bicarbonate solution for measurement of evolved CO2 by HS-GC. The results showed that the method had a good precision (relative standard deviation of <3.60%) and accuracy for the 2,3-epoxypropyltrimethylammonium chloride measurement, with recoveries in the range of 96-102%, matching with the data obtained by a reference method, and were within 12% of the values obtained by the more arduous Kjeldahl method for the calculated DS of cationic guar gum. The HS-GC method requires only a small volume of sample and, thus, is suitable for determining the DS of cationic guar gum in laboratory-scale process-related applications.
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Affiliation(s)
- Xiaofang Wan
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Congbao Guo
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Jiarui Feng
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Teng Yu
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Xin-Sheng Chai
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Guangxue Chen
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Wei-Qi Xie
- State Key Laboratory of Pulp and Paper Engineering and ‡School of Materials Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
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Preparation and characterization of cationic and amphoteric mannans from Candida albicans. Carbohydr Polym 2016; 149:1-7. [DOI: 10.1016/j.carbpol.2016.04.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/14/2016] [Accepted: 04/19/2016] [Indexed: 11/18/2022]
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Structural and rheological properties of kappa (κ)-carrageenans covalently modified with cationic moieties. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-0971-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Preparing cationic cotton linter cellulose with high substitution degree by ultrasonic treatment. Carbohydr Polym 2015; 132:214-20. [DOI: 10.1016/j.carbpol.2015.06.055] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 06/21/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
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21
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Barahona T, Prado HJ, Bonelli PR, Cukierman AL, Fissore EL, Gerschenson LN, Matulewicz MC. Cationization of kappa- and iota-carrageenan – Characterization and properties of amphoteric polysaccharides. Carbohydr Polym 2015; 126:70-7. [DOI: 10.1016/j.carbpol.2015.02.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 02/10/2015] [Accepted: 02/16/2015] [Indexed: 11/29/2022]
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22
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Homogeneous tosylation of agarose as an approach toward novel functional polysaccharide materials. Carbohydr Polym 2015; 127:236-45. [DOI: 10.1016/j.carbpol.2015.03.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 03/09/2015] [Accepted: 03/11/2015] [Indexed: 11/19/2022]
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Suflet DM, Popescu I, Pelin IM, Nicolescu A, Hitruc G. Cationic curdlan: Synthesis, characterization and application of quaternary ammonium salts of curdlan. Carbohydr Polym 2015; 123:396-405. [DOI: 10.1016/j.carbpol.2015.01.050] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 01/14/2015] [Accepted: 01/16/2015] [Indexed: 12/21/2022]
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Lee MFX, Chan ES, Tam KC, Tey BT. Thermo-responsive adsorbent for size-selective protein adsorption. J Chromatogr A 2015; 1394:71-80. [DOI: 10.1016/j.chroma.2015.03.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 02/25/2015] [Accepted: 03/16/2015] [Indexed: 12/18/2022]
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25
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Cosenza VA, Navarro DA, Pujol CA, Damonte EB, Stortz CA. Partial and total C-6 oxidation of gelling carrageenans. Modulation of the antiviral activity with the anionic character. Carbohydr Polym 2015; 128:199-206. [PMID: 26005156 DOI: 10.1016/j.carbpol.2015.04.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 11/26/2022]
Abstract
The optimal conditions for the full C-6 oxidation of κ- and ι-carrageenans using (2,2,6,6-tetramethylpiperidinyl)oxy (TEMPO) in the presence of sodium hypochlorite and sodium bromide were assessed. The fully oxidized products were characterized by NMR spectroscopy. Partially oxidized products were also obtained and analyzed by chemical and spectroscopical methods. The antiviral activity of carrageenans against herpes simplex virus HSV-1 and HSV-2 determined by plaque reduction assay, was not largely affected by full oxidation of the polysaccharides, but an increase in activity was detected by partial oxidation. A specific overoxidation on C-2 of the 3,6-anhydrogalactose moiety of κ-carrageenan was identified, solved experimentally and rationalized through the application of molecular modeling.
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Affiliation(s)
- Vanina A Cosenza
- Departamento de Química Orgánica - CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Diego A Navarro
- Departamento de Química Orgánica - CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Carlos A Pujol
- Laboratorio de Virología, Departamento de Química Biológica - IQUIBICEN, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Elsa B Damonte
- Laboratorio de Virología, Departamento de Química Biológica - IQUIBICEN, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Carlos A Stortz
- Departamento de Química Orgánica - CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
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Abstract
Papermaking has been using high quantities of retention agents, mainly cationic substances and organic compounds such as polyamines. The addition of these agents is related to economic and environmental issues, increasing contamination of the effluents. The aim of this work is to develop a cationic polymer for papermaking purposes based on the utilization of alpha-cellulose. The cationization of mercerized alpha-cellulose with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC) is governed by a pseudo-second-order reaction. The initial amorphous fraction of cellulose is reacted with CHPTAC until the equilibrium value of nitrogen substitution is reached. Nitrogen is incorporated as a quaternary ammonium group in the polymer. Also, the kinetic constant increased with decreasing crystallinity index, showing the importance of the previous alkalization stage. The use of modified natural polysaccharides is a sustainable alternative to synthetic, nonbiodegradable polyelectrolytes and thus is desirable with a view to developing new products and new processes.
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Thermal degradation and stability of cationic starches and their complexes with iodine. Carbohydr Polym 2014; 112:721-8. [DOI: 10.1016/j.carbpol.2014.06.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 05/16/2014] [Accepted: 06/06/2014] [Indexed: 11/22/2022]
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Preparation and characterization of controlled release matrices based on novel seaweed interpolyelectrolyte complexes. Int J Pharm 2012; 429:12-21. [DOI: 10.1016/j.ijpharm.2012.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 02/28/2012] [Accepted: 03/06/2012] [Indexed: 11/23/2022]
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