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Auteur : Grafiati
Publié le 16 janvier 2024

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1

Kontogiannidou, Eleni, Martina Ferrari, Asteria-Danai Deligianni, Nikolaos Bouropoulos, Dimitrios A. Andreadis, Milena Sorrenti, Laura Catenacci et al. « In Vitro and Ex Vivo Evaluation of Tablets Containing Piroxicam-Cyclodextrin Complexes for Buccal Delivery ». Pharmaceutics 11, no 8 (8 août 2019) : 398. http://dx.doi.org/10.3390/pharmaceutics11080398.

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In the current study, the development of mucoadhesive tablets for buccal delivery of a non-steroidal anti-inflammatory drug was investigated. Binary complexes with piroxicam and cyclodextrins (β-cyclodextrin (β-CD), methylated-β-cyclodextrin (Me-β-CD), and hydroxypropyl-β-cyclodextrin (HP-β-CD)) were prepared by the co-evaporation method. All formulations were characterized by means of differential scanning calorimetry, infrared spectroscopy and powder X-ray diffractometry. Mucoadhesive tablets of binary systems were formulated by direct compression using chitosan as mucoadhesive polymer. The in vitro release profiles of tablets were conducted in simulated saliva and, the drug permeation studies, across porcine buccal mucosa. The results suggest that the rank order effect of cyclodextrins for the drug release was Me-β-CD > HP-β-CD > β-CD, whereas the ex vivo studies showed that the tablets containing chitosan significantly increased the transport of the drug compared to their free complexes. Finally, histological assessment revealed loss of the superficial cell layers, which might be attributed to the presence of cyclodextrins.
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Kozieł, Kinga, Jakub Łagiewka, Beata Girek, Agnieszka Folentarska, Tomasz Girek et Wojciech Ciesielski. « Synthesis of New Amino—β-Cyclodextrin Polymer, Cross-Linked with Pyromellitic Dianhydride and Their Use for the Synthesis of Polymeric Cyclodextrin Based Nanoparticles ». Polymers 13, no 8 (19 avril 2021) : 1332. http://dx.doi.org/10.3390/polym13081332.

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New water soluble amino β-cyclodextrin-based polymer was synthesized by reaction between amino cyclodextrin derivatives and pyromellitic anhydride. This experiment presents amino derivatives, which were synthesized by attaching amino groups to β-cyclodextrins (β-CDs) used mono-6-azido-6-deoxy-β-cyclodextrin (β-CD-N3) and triphenylphosphine (Ph3P) in anhydrous N,N-dimethylformamide (DMF). An amino blocking reaction was conducted. The obtained polymer was purified by ultrafiltration. In addition, an attempt was made to create nanospheres by encapsulating the polymer with chitosan (CT) in an acidic condition. For the first time, nanospheres were obtained in the reaction between an amino β-cyclodextrin polymer and chitosan. Scanning electron microscopy (SEM). 1H NMR and ESI-MS methods for confirmation of reaction product and for structural characterization were employed. The differential scanning calorimetry (DSC) studies of polymers were also carried out.
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Li, Ruobao, Chunling Zhao, Weifen Zhang, Lihong Shi et Jinbao Tang. « Comparison study of chitosan/β-cyclodextrin and carboxymethyl chitosan/β-cyclodextrin microspheres ». Wuhan University Journal of Natural Sciences 14, no 4 (12 juillet 2009) : 362–68. http://dx.doi.org/10.1007/s11859-009-0415-2.

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Li, Wei Hong, Jing Guan, Miao Lei Jing, Shu Jie Huang, Ji Min Wu, Zhi Hong Li, Xiu Dong You et Li Mei Hao. « Discussion on β-Cyclodextrin Grafting onto Chitosan Fiber Protected by Benzaldehyde ». Applied Mechanics and Materials 152-154 (janvier 2012) : 244–49. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.244.

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In order to graft β-cyclodextrin onto chitosan fibers as more as possible, amino group of chitosan fibers should be protected by benzaldehyde firstly. Based on the similar structure of chitosan and cellulose fibers, different experimental programs were employed to discuss the possibility of β-cyclodextrin grafted onto chitosan fibers in the similar method. By infrared spectral and UV–visible spectroscopy analysis, the results showed although benzaldehyde could be grafted to chitosan fibers successfully to protect amino group, β-cyclodextrin could not be grafted further.
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Youwei, Yu, et Ren Yinzhe. « Grape Preservation Using Chitosan Combined withβ-Cyclodextrin ». International Journal of Agronomy 2013 (2013) : 1–8. http://dx.doi.org/10.1155/2013/209235.

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The effect of 1% chitosan combined with 2%β-cyclodextrin to the preservation of fresh grapes under ambient temperature was investigated. The results indicated that the hydrogen bond formed between the hydroxyl group ofβ-cyclodextrin and the amidogen or hydroxyl group of chitosan and the crystal form of chitosan was also changed when cyclodextrin was doped into chitosan coating. The compound coating could prolong the shelf life of grapes, maintain lower respiration rate and higher activities of superoxide dismutase, peroxidase, and catalase during storage time, and restrain weight loss and malonaldehyde content increase. Coating grapes with chitosan +β-cyclodextrin was a good method in postharvested grape preservation.
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Lv, Zhen, Fu Guang Lu, Lu Lu Fan, Hua Min Qiu et Chuan Nan Luo. « Study on Synthesis and Adsorption Properties of Chitosan Modified by DMF Grafted β-CD ». Advanced Materials Research 306-307 (août 2011) : 642–45. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.642.

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The synthesis chitosan modified by N,N-dimethylformamide(DMF) grafted β-CD (CTS), adsorption experiments of lanthanide ions, a new type water treatment agent, are discussed in this paper. First, the chitosan was modified by DMF, and then β-cyclodextrin (β-CD) was grafted onto chitosan skeleton by epoxy chloropropane. The effects of temperature, pH value, adsorption time on adsorption content were studied. The water treatment agent have a high lanthanide adsorption rate up to 98% compared to chitosan, b-CD and chitosan derivative bearing β-cyclodextrin.
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Zhou, Zhi Wu, Jing Song Wang, Qing Wei Guo et Zhen Cheng Xu. « Preparation of Magnetic Chitosan-β-Cyclodextrin Polymer and its Adsorption for Thallium (III) in Aqueous Solution ». Advanced Materials Research 479-481 (février 2012) : 1733–36. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1733.

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Magnetic chitosan bonded β-cyclodextrin polymer was prepared, and its metal ion binding was studied using the batch static tests for thallium removal. The results indicated that magnetic chitosan-β-cyclodextrin polymer (MCS-CD) showed a high efficiency for the removal of thallium, the experiment data fitted well to the pseudo second-order kinetic model, the maximum adsorption capacity of 2.154mgg-1 was obtained according to the isothermal data.
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Suhail, Muhammad, Yu-Fang Shao, Quoc Lam Vu et Pao-Chu Wu. « Designing of pH-Sensitive Hydrogels for Colon Targeted Drug Delivery ; Characterization and In Vitro Evaluation ». Gels 8, no 3 (3 mars 2022) : 155. http://dx.doi.org/10.3390/gels8030155.

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In the current research work, pH-sensitive hydrogels were prepared via a free radical polymerization technique for the targeted delivery of 5-aminosalicylic acid to the colon. Various proportions of chitosan, β-Cyclodextrin, and acrylic acid were cross-linked by ethylene glycol dimethacrylate. Ammonium persulfate was employed as an initiator. The development of a new polymeric network and the successful encapsulation of the drug were confirmed by Fourier transform infrared spectroscopy. Thermogravimetric analysis indicated high thermal stability of the hydrogel compared to pure chitosan and β-Cyclodextrin. A rough and hard surface was revealed by scanning electron microscopy. Similarly, the crystallinity of the chitosan, β-Cyclodextrin, and fabricated hydrogel was evaluated using powder X-ray diffraction. The swelling and drug release studies were performed in both acidic and basic medium (pH 1.2 and 7.4, respectively) at 37 °C. High swelling and drug release was observed at pH 7.4 as compared to pH 1.2. The increased incorporation of chitosan, β-Cyclodextrin, and acrylic acid led to an increase in porosity, swelling, loading, drug release, and gel fraction of the hydrogel, whereas a decrease in sol fraction was observed. Thus, we can conclude from the results that a developed pH-sensitive network of hydrogel could be employed as a promising carrier for targeted drug delivery systems.
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Zhang, Yan, Hui Zhang, Fang Wang et Li-Xia Wang. « Preparation and Properties of Ginger Essential Oil β-Cyclodextrin/Chitosan Inclusion Complexes ». Coatings 8, no 9 (29 août 2018) : 305. http://dx.doi.org/10.3390/coatings8090305.

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The ginger essential oil/β-cyclodextrin (GEO/β-CD) composite, ginger essential oil/β-cyclodextrin/chitosan (GEO/β-CD/CTS) particles and ginger essential oil/β-cyclodextrin/chitosan (GEO/β-CD/CTS) microsphere were prepared with the methods of inclusion, ionic gelation and spray drying. Their properties were studied by using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermo-gravimetry analysis (TGA), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The results showed that the particle size of GEO/β-CD composite was smaller than that of β-CD and GEO/β-CD/CTS particles were loose and porous, while the microsphere obtained by spray drying had certain cohesiveness and small particle size. Besides, results also indicated that β-CD/CTS could modify properties and improve the thermal stability of GEO, which would improve its application value in food and medical industries.
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Petitjean, Max, Florian Aussant, Ainara Vergara et José Ramón Isasi. « Solventless Crosslinking of Chitosan, Xanthan, and Locust Bean Gum Networks Functionalized with β-Cyclodextrin ». Gels 6, no 4 (15 décembre 2020) : 51. http://dx.doi.org/10.3390/gels6040051.

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The incorporation of cyclodextrins into polymeric crosslinked gels of hydrophilic nature can be useful for promoting the sorption of hydrophobic molecules and/or modulating the release of active principles. The covalent addition of these excipients to the matrix integrates their solubilizing effect that can contribute to increase the capacity of retention of hydrophobic substances. In this study, three diverse polysaccharides, chitosan, xanthan gum, and locust bean gum, were crosslinked with or without β-cyclodextrin, using citric acid in different ratios, to create hydrogel matrices. Through a green synthetic path, the efficient production of soluble and insoluble (hydrogel) networks functionalized with β-cyclodextrin was achieved by means of a solventless procedure. The characterization of their chemical composition, swelling in water, and their sorption and release behavior were also carried out in this work.
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Alvi, Zunaira, Muhammad Akhtar, Nisar U. Rahman, Khaled M. Hosny, Amal M. Sindi, Barkat A. Khan, Imran Nazir et Hadia Sadaquat. « Utilization of Gelling Polymer to Formulate Nanoparticles Loaded with Epalrestat-Cyclodextrin Inclusion Complex : Formulation, Characterization, In-Silico Modelling and In-Vivo Toxicity Evaluation ». Polymers 13, no 24 (12 décembre 2021) : 4350. http://dx.doi.org/10.3390/polym13244350.

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Epalrestat (EPL) is an aldose reductase inhibitor with poor aqueous solubility that affects its therapeutic efficacy. The research study was designed to prepare epalrestat-cyclodextrins (EPL-CDs) inclusion complexes to enhance the aqueous solubility by using beta-cyclodextrin (β-CD) and sulfobutyl ether₇ β-CD (SBE7 β-CD). Furthermore, polymeric nanoparticles (PNPs) of EPL-CDs were developed using chitosan (CS) and sodium tripolyphosphate (sTPP). The EPL-CDs complexed formulations were then loaded into chitosan nanoparticles (CS NPs) and further characterized for different physico-chemical properties, thermal stability, drug-excipient compatibility and acute oral toxicity studies. In-silico molecular docking of cross-linker with SBE7 β-CD was also carried out to determine the binding site of the CDs with the cross-linker. The sizes of the prepared NPs were laid in the range of 241.5–348.4 nm, with polydispersity index (PDI) ranging from 0.302–0.578. The surface morphology of the NPs was found to be non-porous, smooth, and spherical. The cumulative percentage of drug release from EPL-CDs loaded CS NPs was found to be higher (75–88%) than that of the pure drug (25%). Acute oral toxicity on animal models showed a biochemical, histological profile with no harmful impact at the cellular level. It is concluded that epalrestat-cyclodextrin chitosan nanoparticles (EPL-CDs-CS NPs) with improved solubility are safe for oral administration since no toxicity was reported on vital organs in rabbits.
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Li, Wei Hong, Jing Guan, Miao Lei Jing et Shu Jie Huang. « Study on Preparation of Chitosan Fiber Grafted with β-Cyclodextrin ». Advanced Materials Research 393-395 (novembre 2011) : 324–29. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.324.

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The aim of the study was to investigate the grafting process of β-cyclodextrin onto chitosan fibers via epichlorohydrin as a crosslinking agent. The parameters influencing the efficiency of the grafting reaction were studied by L9 (34) orthogonal test. The amounts of β-cyclodextrin grafting onto the treated fibers were estimated in terms of levofloxacin content. The optimum process was found to be epichlorohydrin 0.64 ml, temperature25°C, post-reaction time 48h, pre-reaction time 4.5h when chitosan fibers were 0.48g. In the case, the inclusion amount of levofloxacin was 1.792mg/g, and the releasing amount was 0.845mg/g at 35°C. The modified and unmodified fibers were characterized by FTIR Spectroscopy , which indicated that β-CD grafted with chitosan fibers were prepared successfully.
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Petitjean, Max, et José Ramón Isasi. « Preparation of β-cyclodextrin/polysaccharide foams using saponin ». Beilstein Journal of Organic Chemistry 19 (24 janvier 2023) : 78–88. http://dx.doi.org/10.3762/bjoc.19.7.

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Cyclodextrins, cyclic oligosaccharides with a hydrophobic cavity that form inclusion complexes with nonpolar molecules, can be used to functionalize other polysaccharides. Xanthan gum, locust bean gum or chitosan can be crosslinked using citric acid in the presence of β-cyclodextrin to produce insoluble matrices. In this work, polymeric foams based on those polysaccharides and saponin have been prepared using a green synthesis method to increase the porosity of the matrices. The saponin of soapbark (Quillaja saponaria) has been used to obtain foams using different procedures. The influence of the synthesis path on the porosity of the materials and their corresponding sorption capacities in the aqueous phase were evaluated.
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Harsa, Sebnem, et Shintaro Furusaki. « Separation of Amyloglucosidase Using β-Cyclodextrin/Chitosan ». Separation Science and Technology 29, no 5 (mars 1994) : 639–50. http://dx.doi.org/10.1080/01496399408000172.

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Jung, Byung Ok, Sang Bong Lee et Jae Sik Na. « Hydrogel Composed of Chitosan and Cyclodextrin and Evaluation of its Antioxidant Activity ». Key Engineering Materials 342-343 (juillet 2007) : 705–8. http://dx.doi.org/10.4028/www.scientific.net/kem.342-343.705.

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The hydrogels composed of chitosan and carboxylmethyl-β-cyclodextrin (CMCD) were prepared to enhance and sustain the antioxidant activities. The carboxylic groups of CMCD were directly grafted and cross-linked on the amino groups of chitosan. The swelling rate decreased with increasing the CMCD contents in the hydrogel and the swelling ratio of CMCD-grafted chitosan hydrogels was improved due to breaking the crystallinity of chitosan caused by introducing the bulky group such as cyclodextrin. The scavenging activity of the tested hydrogels increased with CMCD contents, because antioxidants entrapped in the CMCD were potent free radical terminators.
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Bui, Cuong Viet, Thomas Rosenau et Hubert Hettegger. « Polysaccharide- and β-Cyclodextrin-Based Chiral Selectors for Enantiomer Resolution : Recent Developments and Applications ». Molecules 26, no 14 (16 juillet 2021) : 4322. http://dx.doi.org/10.3390/molecules26144322.

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Polysaccharides, oligosaccharides, and their derivatives, particularly of amylose, cellulose, chitosan, and β-cyclodextrin, are well-known chiral selectors (CSs) of chiral stationary phases (CSPs) in chromatography, because they can separate a wide range of enantiomers. Typically, such CSPs are prepared by physically coating, or chemically immobilizing the polysaccharide and β-cyclodextrin derivatives onto inert silica gel carriers as chromatographic support. Over the past few years, new chiral selectors have been introduced, and progressive methods to prepare CSPs have been exploited. Also, chiral recognition mechanisms, which play a crucial role in the investigation of chiral separations, have been better elucidated. Further insights into the broad functional performance of commercially available chiral column materials and/or the respective newly developed chiral phase materials on enantiomeric separation (ES) have been gained. This review summarizes the recent developments in CSs, CSP preparation, chiral recognition mechanisms, and enantiomeric separation methods, based on polysaccharides and β-cyclodextrins as CSs, with a focus on the years 2019–2020 of this rapidly developing field.
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Liu, Jiaxin, Siqi Wang, Xiuqing Ding, Jingyi Fu et Jun Zhao. « Investigating the zinc ion adsorption capacity of a chitosan/β-cyclodextrin complex in wastewater ». E3S Web of Conferences 143 (2020) : 02006. http://dx.doi.org/10.1051/e3sconf/202014302006.

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To decrease the amount of Zn2+ in industrial waste water, in this study, β-cyclodextrin (β-CD) was first modified and then used to obtain a β-cyclodextrin polymer (β-CDP). The effects of reaction temperature and reaction time of β-CD with citric acid (CA), polyethylene glycol 400 (PEG-400), and disodium hydrogen phosphate (NaH2PO4) on the amount of β-CDP produced were investigated. The results showed that at a reaction temperature of 145 °C and a reaction time of 4.5 h, 6.58 g of β-CDP was produced. Then, chitosan (CTS) was crosslinked with β-CDP using glutaraldehyde to prepare a chitosan/β-cyclodextrin (CTS/β-CDP) complex. The mass ratio of CTS to β-CDP, reaction temperature, reaction time, and amount of added glutaraldehyde were used as the main variables to examine the Zn2+ adsorption rate and adsorption capacity of the composites prepared in this study. The optimum experimental conditions were as follows: a mass ratio of 3:10, a reaction temperature of 80 °C, a reaction time of 90 min, and 2 mL of glutaraldehyde. Under these optimal conditions, the adsorption amount and adsorption rates of Zn2+ using CTS/β-CDP complex were respectively 97.70 mg·g-1 and 78.92%.
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Gomez-Maldonado, Diego, Autumn Marie Reynolds, Daniel J. Burnett, R. Jayachandra Babu, Matthew N. Waters et Maria S. Peresin. « Delignified wood aerogels as scaffolds coated with an oriented chitosan–cyclodextrin co-polymer for removal of microcystin-LR ». RSC Advances 12, no 31 (2022) : 20330–39. http://dx.doi.org/10.1039/d2ra03556a.

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Herein, a preassembled chitosan-cyclodextrin was used as a versatile coating onto delignified wood as an alternative for the removal of microcystin-LR. The addition of β-cyclodextrin proved to allow the nanowood scaffold to adsorb up to 0.12 mg g−1.
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Taweepreda, Wirach, et Pikul Wanichapichart. « Film Formation of Inclusion Complexes between Acetyl-Beta-Cyclodextrin and Chitosan ». Advanced Materials Research 506 (avril 2012) : 409–12. http://dx.doi.org/10.4028/www.scientific.net/amr.506.409.

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In this research, the films which were prepared from inclusion complexes (ICs) of acetyl-beta-cyclodextrin (Acetyl-β-CD) with chitosan were characterized and the membrane properties were investigated. Acetyl-β-CD either improved the solubility of chitosan or increased the salt rejection of the membrane. The crystalline ICs, were formed and found on the membrane surface. There were isolated and characterized by scanning electron microscopy (SEM), X-ray diffraction and atomic force microscopy (AFM). The stability and conformation of the inclusion complexes in solvent and limited number of acetyl-β-CD threaded on chitosan molecules were studied and compared the results on a molecular level of the pseudopolyrotaxane.
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Chen, Pengfei, Hang Song, Shun Yao, Xianyu Tu, Miao Su et Lu Zhou. « Magnetic targeted nanoparticles based on β-cyclodextrin and chitosan for hydrophobic drug delivery and a study of their mechanism ». RSC Advances 7, no 46 (2017) : 29025–34. http://dx.doi.org/10.1039/c7ra02398g.

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Filho, Cesar M. C., Pedro V. A. Bueno, Alan F. Y. Matsushita, Adley F. Rubira, Edvani C. Muniz, Luísa Durães, Dina M. B. Murtinho et Artur J. M. Valente. « Synthesis, characterization and sorption studies of aromatic compounds by hydrogels of chitosan blended with β-cyclodextrin- and PVA-functionalized pectin ». RSC Advances 8, no 26 (2018) : 14609–22. http://dx.doi.org/10.1039/c8ra02332h.

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Zhang, Wei Fen, Xi Guang Chen, Pi Wu Li, Qiang Zhi He et Hui Yun Zhou. « Chitosan and chitosan/β-cyclodextrin microspheres as sustained-release drug carriers ». Journal of Applied Polymer Science 103, no 2 (2006) : 1183–90. http://dx.doi.org/10.1002/app.25373.

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Jolly, Reshma, Mohammad Furkan, Aijaz Ahmed Khan, Syed Sayeed Ahmed, Sharique Alam, Mohd Ahmadullah Farooqi, Rizwan Hasan Khan et Mohammad Shakir. « Synthesis and characterization of β-cyclodextrin/carboxymethyl chitosan/hydroxyapatite fused with date seed extract nanocomposite scaffolds for regenerative bone tissue engineering ». Materials Advances 2, no 17 (2021) : 5723–36. http://dx.doi.org/10.1039/d1ma00286d.

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A first report on the fabrication of nanocomposite scaffolds containing nano-hydroxyapatite/carboxymethyl chitosan/β-cyclodextrin heterojunctions fused with date seed extract for bone tissue engineering applications.
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Chen, Pengfei, Hang Song, Lu Zhou, Jun Chen, Jiyang Liu et Shun Yao. « Magnetic solid-phase extraction based on ferroferric oxide nanoparticles doubly coated with chitosan and β-cyclodextrin in layer-by-layer mode for the separation of ibuprofen ». RSC Advances 6, no 61 (2016) : 56240–48. http://dx.doi.org/10.1039/c6ra08000f.

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Huang, Xixian, Yunguo Liu, Shaobo Liu, Xiaofei Tan, Yang Ding, Guangming Zeng, Yaoyu Zhou, Mingming Zhang, Shufan Wang et Bohong Zheng. « Effective removal of Cr(vi) using β-cyclodextrin–chitosan modified biochars with adsorption/reduction bifuctional roles ». RSC Advances 6, no 1 (2016) : 94–104. http://dx.doi.org/10.1039/c5ra22886g.

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Duan, Huimin, Leilei Li, Xiaojiao Wang, Yanhui Wang, Jianbo Li et Chuannan Luo. « β-Cyclodextrin/chitosan–magnetic graphene oxide–surface molecularly imprinted polymer nanocomplex coupled with chemiluminescence biosensing of bovine serum albumin ». RSC Advances 5, no 84 (2015) : 68397–403. http://dx.doi.org/10.1039/c5ra11061k.

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In this report, a sensitive and selective chemiluminescence biosensor for bovine serum albumin coupled with surface molecularly imprinted nanocomplex using β-cyclodextrin/chitosan–magnetic graphene oxide as backbone material was investigated.
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Shi, Wenjian, Shuwei Chen, Fei Chang, Yue Han et Yuanzhang Zhang. « Studies on the adsorption of sulfo-group-containing aromatics by chitosan-β-cyclodextrin ». Water Science and Technology 65, no 5 (1 mars 2012) : 802–7. http://dx.doi.org/10.2166/wst.2012.474.

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Chitosan-β-cyclodextrin (CTS-CD) prepared through a crosslinking reaction between chitosan and β-cyclodextrin was employed to adsorb the three following sulfo-group-containing aromatics: disodium 2-naphthol-3,6-disulfonate (R salt), 2-naphthalene sulfonic acid (NSA), and sodium dodecylbenzene sulfonate (SDBS). At 318 K, the saturated adsorption capacity of CTS-CD for R salt, NSA, and SDBS was 431, 416, and 376 mg/g, respectively. The experimental data fitted the second-order model well and the rate constant of the adsorption increased with the temperature increment. The values of apparent activation energy for R salt, NSA, and SDBS were calculated as 33.2, 34.2, and 16.8 kJ/mol respectively. The isothermal adsorption was found following the Langmuir adsorption equation. The negative values of ΔG and the positive values of ΔH indicated that the adsorption process was spontaneous and exothermic.
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Fai, Tan Kin, Goh Hui Yee, Palanirajan Vijayaraj Kumar et Manogaran Elumalai. « Preparation of Chitosan Particles as a Delivery System for Tetrahydrocurcumin : β-cyclodextrin Inclusive Compound for Colorectal Carcinoma ». Current Drug Therapy 16, no 5 (octobre 2021) : 430–38. http://dx.doi.org/10.2174/1574885516666211210153741.

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Background: Tetrahydrocurcumin is a hydrogenated active metabolite of curcumin that exhibits similar pharmacological effects to curcumin. However, its hydrophobic nature has limited its aqueous solubility and bioavailability. By incorporating the tetrahydrocurcumin into β-cyclodextrin, its physiochemical property can be improved. Objective: To develop a chitosan composite loaded with tetrahydrocurcumin inclusive complex, characterize the developed composites, and evaluate its effectiveness on cancer cells. Methods: Tetrahydrocurcumin was formulated into an inclusive complex with β-cyclodextrin in the ratio of 1:2 (Tetrahydrocurcumin: β-cyclodextrin). The tetrahydrocurcumin inclusive complex loaded chitosan particles (THC IC-loaded CPs) were prepared using ionic gelation and later characterized using FTIR. Cytotoxicity of THC IC-loaded CPs in human colon cancer cells, Caco-2 cells, was examined using RTCA xCELLigence technology. The uptake of these particles by Caco-2 cells was also evaluated via fluorescing microscopy. Results: FTIR results confirmed the formation of the tetrahydrocurcumin inclusive complex and the loading of this complex into chitosan composites. The cytotoxic effect of THC IC-loaded CPs showed a dose-dependent relationship, and the IC50 found was 1.117mM and 0.959mM after 48 and 72 hours, respectively. THC IC-loaded CPs showed an immediate uptake by CaCo-2 cells, and the maximum uptake was observed after 1 hour of incubation. Conclusion: This study showed that THC IC-loaded CPs is a potential drug carrier to deliver tetrahydrocurcumin into cancer cells and able to produce a cytotoxic effect on cancer cells.
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Ferreira, Miguel, Diana Gomes, Miguel Neto, Luís A. Passarinha, Diana Costa et Ângela Sousa. « Development and Characterization of Quercetin-Loaded Delivery Systems for Increasing Its Bioavailability in Cervical Cancer Cells ». Pharmaceutics 15, no 3 (14 mars 2023) : 936. http://dx.doi.org/10.3390/pharmaceutics15030936.

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Quercetin is a natural flavonoid with high anticancer activity, especially for related-HPV cancers such as cervical cancer. However, quercetin exhibits a reduced aqueous solubility and stability, resulting in a low bioavailability that limits its therapeutic use. In this study, chitosan/sulfonyl-ether-β-cyclodextrin (SBE-β-CD)-conjugated delivery systems have been explored in order to increase quercetin loading capacity, carriage, solubility and consequently bioavailability in cervical cancer cells. SBE-β-CD/quercetin inclusion complexes were tested as well as chitosan/SBE-β-CD/quercetin-conjugated delivery systems, using two types of chitosan differing in molecular weight. Regarding characterization studies, HMW chitosan/SBE-β-CD/quercetin formulations have demonstrated the best results, which are obtaining nanoparticle sizes of 272.07 ± 2.87 nm, a polydispersity index (PdI) of 0.287 ± 0.011, a zeta potential of +38.0 ± 1.34 mV and an encapsulation efficiency of approximately 99.9%. In vitro release studies were also performed for 5 kDa chitosan formulations, indicating a quercetin release of 9.6% and 57.53% at pH 7.4 and 5.8, respectively. IC50 values on HeLa cells indicated an increased cytotoxic effect with HMW chitosan/SBE-β-CD/quercetin delivery systems (43.55 μM), suggesting a remarkable improvement of quercetin bioavailability.
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Xiao, Jian Bo, Xiao Qing Chen, Hong Zhu Yu et Ming Xu. « Adsorption of nucleotides on β-cyclodextrin derivative grafted chitosan ». Macromolecular Research 14, no 4 (août 2006) : 443–48. http://dx.doi.org/10.1007/bf03219108.

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Luzardo-Álvarez, Asteria, Álvaro Antelo-Queijo, Victor H. Soto et José Blanco-Méndez. « Preparation and characterization of β-cyclodextrin-linked chitosan microparticles ». Journal of Applied Polymer Science 123, no 6 (21 septembre 2011) : 3595–604. http://dx.doi.org/10.1002/app.34905.

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Chen, Hai Jun, Fu Xin Yang, Li Juan Ou, Dong Xiang Zhou et Li Li. « The Effects of the Film Made by Citral β-Cyclodextrin Inclusion Complex Combined with Chitosan on Fresh Beef ». Advanced Materials Research 989-994 (juillet 2014) : 1052–55. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1052.

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Films of chitosan (Ch), Ch+0.5%(v/v) the citral (CI), Ch+2.5%(w/v) the citral β-cyclodextrin inclusion complex (β-CD-CI) and the physics mixture CI and β-CD-CI were prepared on the quality of fresh beef during refrigerated storage at 4±1°C were investigated, and verified the preservation effect of wrap fresh beef. The control and the treated beef samples were analyzed periodically for the total volatile basic nitrogen (TVBN), aerobic bacterial count (ABC), the sensory evaluation, and pH. The results indicate that all treatments retarded the decay of the beef samples. The chitosan film with the β-CD-CI exhibited superior to the preservation ability compared with control pure chitosan film treatment in maintaining the quality of fresh beef samples and significantly extended the shelf life by approximately 5 days.
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De Gaetano, Federica, Nicola d’Avanzo, Antonia Mancuso, Anna De Gaetano, Giuseppe Paladini, Francesco Caridi, Valentina Venuti, Donatella Paolino et Cinzia Anna Ventura. « Chitosan/Cyclodextrin Nanospheres for Potential Nose-to-Brain Targeting of Idebenone ». Pharmaceuticals 15, no 10 (28 septembre 2022) : 1206. http://dx.doi.org/10.3390/ph15101206.

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Idebenone (IDE) is a powerful antioxidant that is potentially active towards cerebral diseases, but its low water solubility and fast first pass metabolism reduce its accumulation in the brain, making it ineffective. In this work, we developed cyclodextrin-based chitosan nanospheres (CS NPs) as potential carriers for nose-to-brain targeting of IDE. Sulfobutylether-β-cyclodextrin (SBE-β-CD) was used as a polyanion for chitosan (CS) and as a complexing agent for IDE, permitting its encapsulation into nanospheres (NPs) produced in an aqueous solution. Overloading NPs were obtained by adding the soluble IDE/hydroxypropyl-β-CD (IDE/HP-β-CD) inclusion complex into the CS or SBE-β-CD solutions. We obtained homogeneous CS NPs with a hydrodynamic radius of about 140 nm, positive zeta potential (about +28 mV), and good encapsulation efficiency and drug loading, particularly for overloaded NPs. A biphasic release of IDE, finished within 48 h, was observed from overloaded NPs, whilst non-overloaded CS NPs produced a prolonged release, without a burst effect. In vitro biological studies showed the ability of CS NPs to preserve the antioxidant activity of IDE on U373 culture cells. Furthermore, Fourier transform infrared spectroscopy (FT-IR) demonstrated the ability of CS NPs to interact with the excised bovine nasal mucosa, improving the permeation of the drug and potentially favoring its accumulation in the brain.
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SINGH, NAGENDER, SAMINATHAN RATNAPANDIAN et JAVED SHEIKH. « DURABLE MULTIFUNCTIONAL FINISHING OF COTTON USING -CYCLODEXTRIN-GRAFTED CHITOSAN AND LEMONGRASS(CYMBOPOGON CITRATUS) OIL ». Cellulose Chemistry and Technology 55, no 1-2 (12 février 2021) : 177–84. http://dx.doi.org/10.35812/10.35812/cellulosechemtechnol.2021.55.19.

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Multifunctional finishing of textiles enhances the value of products by adding desired biological and functional properties. The purpose of this study was to extract essential oil from lemongrass and apply the extracted oil to traditional cotton fabric as finishing. Lemongrass oleoresin was obtained by extracting fresh blades of lemongrass for 16 h using a Soxhlet extractor, employing n-hexane as solvent, by the AATCC Method 30-25. The pad-dry technique was applied to impart fragrance to cotton fabric by using a finishing formulation containing lemongrass oil and β-cyclodextrin-grafted chitosan. The ester bond formation between β-cyclodextrin-grafted chitosan and cellulose was confirmed by FTIR spectroscopy (FTIR). After finishing, the fragrance release rate was evaluated by UV-visible spectroscopy. The fragrance release rate of the finished fabric was found to be durable up to 18 washing cycles and the fabric presented excellent antibacterial property and antioxidant activity. Standard test methods were used to evaluate the physical properties of the treated fabric.
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Filho, Cesar M. C., Pedro V. A. Bueno, Alan F. Y. Matsushita, Bruno H. Vilsinski, Adley F. Rubira, Edvani C. Muniz, Dina M. B. Murtinho et Artur J. M. Valente. « Uncommon Sorption Mechanism of Aromatic Compounds onto Poly(Vinyl Alcohol)/Chitosan/Maleic Anhydride-β-Cyclodextrin Hydrogels ». Polymers 12, no 4 (10 avril 2020) : 877. http://dx.doi.org/10.3390/polym12040877.

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Aromatic hydrocarbons are extensive environmental pollutants occurring in both water and air media, and their removal is a priority effort for a healthy environment. The use of adsorbents is among the several strategies used for the remediation of these compounds. In this paper, we aim the synthesis of an amphiphilic hydrogel with the potential for the simultaneous sorption of a set of monocyclic and polycyclic aromatic hydrocarbons associated with toxicity effects in humans. Thus, we start by the synthesis of a copolymer-based in chitosan and β-cyclodextrin previously functionalized with the maleic anhydride. The presence of β-cyclodextrin will confer the ability to interact with hydrophobic compounds. The resulting material is posteriorly incorporated in a cryogel of poly(vinyl alcohol) matrix. We aim to improve the amphiphilic ability of the hydrogel matrix. The obtained hydrogel was characterized by swelling water kinetics, thermogravimetric analysis, rheological measurements, and scanning electron microscopy. The sorption of aromatic hydrocarbons onto the gel is characterized by pseudo-first-order kinetics and Henry isotherm, suggesting a physisorption mechanism. The results show that the presence of maleic anhydride-β-cyclodextrin and chitosan into hydrogels leads to an increase in the removal efficiency of the aromatic compounds. Additionally, the capacity of this hydrogel for removing these pollutants from a fossil fuel sample has also been tested.
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De Gaetano, Federica, Andreana Marino, Alessia Marchetta, Corrado Bongiorno, Roberto Zagami, Maria C. Cristiano, Donatella Paolino, Venerando Pistarà et Cinzia A. Ventura. « Development of Chitosan/Cyclodextrin Nanospheres for Levofloxacin Ocular Delivery ». Pharmaceutics 13, no 8 (19 août 2021) : 1293. http://dx.doi.org/10.3390/pharmaceutics13081293.

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Levofloxacin (LVF) is an antibacterial drug approved for the treatment of ocular infections. However, due to the low ocular bioavailability, high doses are needed, causing bacterial resistance. Polymeric nanospheres (NPs) loading antibiotic drugs represent the most promising approach to eradicate ocular infections and to treat pathogen resistance. In this study, we have developed chitosan NPs based on sulfobutyl-ether-β-cyclodextrin (CH/SBE-β-CD NPs) for ocular delivery of LVF. CH/SBE-β-CD NPs loading LVF were characterized in terms of encapsulation parameters, morphology, and sizes, in comparison to NPs produced without the macrocycle. Nuclear magnetic resonance and UV–vis spectroscopy studies demonstrated that SBE-β-CD is able to complex LVF and to influence encapsulation parameters of NPs, producing high encapsulation efficiency and LVF loading. The NPs were homogenous in size, with a hydrodynamic radius between 80 and 170 nm and positive zeta potential (ζ) values. This surface property could promote the interaction of NPs with the negatively charged ocular tissue, increasing their residence time and, consequently, LVF efficacy. In vitro, antibacterial activity against Gram-positive and Gram-negative bacteria showed a double higher activity of CH/SBE-β-CD NPs loading LVF compared to the free drug, suggesting that chitosan NPs based on SBE-β-CD could be a useful system for the treatment of ocular infections.
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Apirakaramwong, A., Perayot Pamonsinlapatham, S. Techaarpornkul, Praneet Opanasopit, Suwannee Panomsuk et S. Soksawatmaekhin. « Mechanisms of Cellular Uptake with Chitosan/DNA Complex in Hepatoma Cell Line ». Advanced Materials Research 506 (avril 2012) : 485–88. http://dx.doi.org/10.4028/www.scientific.net/amr.506.485.

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Chitosan (CS) has a high potential for gene delivery into mammalian cells. However, its uptake mechanism is not well clarified. We investigated the effects of inhibitors of clathrin-mediated endocytosis (chlorpromazine), caveolae-mediated endocytosis (genistein), macropinocytosis (LY 29004 and wortmannin), microtubuli polymerization (nocodazole) and of membrane cholesterol recycle (methyl-β-cyclodextrin) on the transfection efficiency with CS/pEGFP complexes and on the internalization of CS/rhodamine-labeled pEGFP complexes by hepatoma cell line (Huh 7 cells). The transfection was blocked by nocodazole, genistein, and methyl-β-cyclodextrin, respectively. CS/DNA complexes internalization was clearly inhibited by genistein. We conclude that the complexes uptake predominantly by caveolin-mediated pathways. In addition, fluorescence colocalization studies with acidotropic probes, LysoSensor dye, illustrated that CS/DNA complexes are targeted to lysosomes for the degradation after internalization.
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Lou, Chaoqian, Xiuzhi Tian, Haibo Deng, Yingxia Wang et Xue Jiang. « Dialdehyde-β-cyclodextrin-crosslinked carboxymethyl chitosan hydrogel for drug release ». Carbohydrate Polymers 231 (mars 2020) : 115678. http://dx.doi.org/10.1016/j.carbpol.2019.115678.

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Zhou, Hui Yun, Zhi Ying Wang, Xi Yan Duan, Ling Juan Jiang, Pei Pei Cao, Jia Xi Li et Jun Bo Li. « Design and evaluation of chitosan-β-cyclodextrin based thermosensitive hydrogel ». Biochemical Engineering Journal 111 (juillet 2016) : 100–107. http://dx.doi.org/10.1016/j.bej.2016.03.011.

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da Rosa, Cleonice Gonçalves, Caroline Dellinghausen Borges, Rui Carlos Zambiazi, Michael Ramos Nunes, Edilson Valmir Benvenutti, Suzane Rickes da Luz, Roseane Farias D’Avila et Josiane Kuhn Rutz. « Microencapsulation of gallic acid in chitosan, β-cyclodextrin and xanthan ». Industrial Crops and Products 46 (avril 2013) : 138–46. http://dx.doi.org/10.1016/j.indcrop.2012.12.053.

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Zhang, Weifen, Xiguang Chen, Piwu Li, Qiangzhi He, Huiyun Zhou et Dongsu Cha. « Chitosan and β-cyclodextrin microspheres as pulmonary sustained delivery systems ». Journal of Wuhan University of Technology-Mater. Sci. Ed. 23, no 4 (août 2008) : 541–46. http://dx.doi.org/10.1007/s11595-006-4541-9.

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Shangguan, Yonggang, Mingguo Liu, Guohang Luo et Qiang Zheng. « Shear induced self-thickening of chitosan/β-cyclodextrin compound solution ». RSC Adv. 6, no 111 (2016) : 110367–74. http://dx.doi.org/10.1039/c6ra24608g.

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Harsa, Sebnem, et Shintaro Furusaki. « Bioaffinity Adsorption Behavior of Several Enzymes onto β-Cyclodextrin-Chitosan ». Separation Science and Technology 30, no 13 (juillet 1995) : 2695–706. http://dx.doi.org/10.1080/01496399508013710.

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Stopilha, Roberta T., Francisco H. Xavier-Júnior, Claudio L. De Vasconcelos et José L. C. Fonseca. « Carboxymethylated-β-cyclodextrin/chitosan particles : bulk solids and aqueous dispersions ». Journal of Dispersion Science and Technology 41, no 5 (13 mai 2019) : 717–24. http://dx.doi.org/10.1080/01932691.2019.1611440.

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Sharma, A. K., et A. K. Mishra. « Microwave induced β-cyclodextrin modification of chitosan for lead sorption ». International Journal of Biological Macromolecules 47, no 3 (octobre 2010) : 410–19. http://dx.doi.org/10.1016/j.ijbiomac.2010.06.012.

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Zhang, Wei Fen, Xi Guang Chen, Pi Wu Li, Qiang Zhi He et Hui Yun Zhou. « Preparation and characterization of theophylline loaded chitosan/β-cyclodextrin microspheres ». Journal of Materials Science : Materials in Medicine 19, no 1 (28 juin 2007) : 305–10. http://dx.doi.org/10.1007/s10856-006-0021-1.

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Wilson, Lee D., Dawn Y. Pratt et Janusz A. Kozinski. « Preparation and sorption studies of β-cyclodextrin–chitosan–glutaraldehyde terpolymers ». Journal of Colloid and Interface Science 393 (mars 2013) : 271–77. http://dx.doi.org/10.1016/j.jcis.2012.10.046.

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Xue, Chen, et Lee D. Wilson. « A Spectroscopic Study of Solid-Phase Chitosan/Cyclodextrin-Based Electrospun Fibers ». Fibers 7, no 5 (22 mai 2019) : 48. http://dx.doi.org/10.3390/fib7050048.

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In this study, chitosan (chi)/hydroxypropyl-β-cyclodextrin (HPCD) 2:20 and 2:50 Chi:HPCD fibers were assembled via an electrospinning process that contained a mixture of chitosan and HPCD with trifluoroacetic acid (TFA) as a solvent. Complementary thermal analysis (thermal gravimetric analysis (TGA)/differential scanning calorimetry (DSC)) and spectroscopic methods (Raman/IR/NMR) were used to evaluate the structure and composition of the fiber assemblies. This study highlights the multifunctional role of TFA as a solvent, proton donor and electrostatically bound pendant group to chitosan, where the formation of a ternary complex occurs via supramolecular host–guest interactions. This work contributes further insight on the formation and stability of such ternary (chitosan + HPCD + solvent) electrospun fibers and their potential utility as “smart” fiber coatings for advanced applications.
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Liu, Tong, Junbo Li, Hongyu Lei, Xinyu Zhen, Yue Wang, Dongxia Gou et Jun Zhao. « Preparation of Chitosan/β-Cyclodextrin Composite Membrane and Its Adsorption Mechanism for Proteins ». Molecules 28, no 8 (14 avril 2023) : 3484. http://dx.doi.org/10.3390/molecules28083484.

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A significant portion of the protein in food waste will contaminate the water. The chitosan/modified β-cyclodextrin (CS/β-CDP) composite membranes were prepared for the adsorption of bovine serum albumin (BSA) in this work to solve the problem of poor adsorption protein performance and easy disintegration by a pure chitosan membrane. A thorough investigation was conducted into the effects of the preparation conditions (the mass ratio of CS and β-CDP, preparation temperature, and glutaraldehyde addition) and adsorption conditions (temperature and pH) on the created CS/β-CDP composite membrane. The physical and chemical properties of pure CS membrane and CS/β-CDP composite membrane were investigated. The results showed that CS/β-CDP composite membrane has better tensile strength, elongation at break, Young’s modulus, contact angle properties, and lower swelling degree. The physicochemical and morphological attributes of composite membranes before and after the adsorption of BSA were characterized by SEM, FT-IR, and XRD. The results showed that the CS/β-CDP composite membrane adsorbed BSA by both physical and chemical mechanisms, and the adsorption isotherm, kinetics, and thermodynamic experiments further confirmed its adsorption mechanism. As a result, the CS/β-CDP composite membrane of absorbing BSA was successfully fabricated, demonstrating the potential application prospect in environmental protection.
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Schöffer, Jéssie da Natividade, Manuela Poletto Klein, Rafael C. Rodrigues et Plinho Francisco Hertz. « Continuous production of β-cyclodextrin from starch by highly stable cyclodextrin glycosyltransferase immobilized on chitosan ». Carbohydrate Polymers 98, no 2 (novembre 2013) : 1311–16. http://dx.doi.org/10.1016/j.carbpol.2013.07.044.

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