Polysaccharides最新文献_第2页

Graft Copolymers of Carboxymethyl Cellulose and Poly(N-vinylimidazole) as Promising Carriers for Metronidazole 羧甲基纤维素和聚（N-乙烯基咪唑）接枝共聚物有望成为甲硝唑的载体

Polysaccharides Pub Date : 2024-07-04 DOI: 10.3390/polysaccharides5030015

M. Lavlinskaya, Anastasia A. Mikhaylova, Egor I. Kuznetsov, Ivan A. Zhuravlev, Nikita A. Balbekov, Igor A. Saranov, A. Sorokin

引用次数: 0

Biomining of ‘Heavy’ Metals and Lanthanides from Red Mud of a Former Lignite Mines by Sorption on Chitin 利用甲壳素的吸附作用从原褐煤矿赤泥中提取 "重 "金属和镧系元素的生物采矿技术

Polysaccharides Pub Date : 2024-06-14 DOI: 10.3390/polysaccharides5020012

Felix Blind, Stefan Fränzle

{"title":"Biomining of ‘Heavy’ Metals and Lanthanides from Red Mud of a Former Lignite Mines by Sorption on Chitin","authors":"Felix Blind, Stefan Fränzle","doi":"10.3390/polysaccharides5020012","DOIUrl":"https://doi.org/10.3390/polysaccharides5020012","url":null,"abstract":"In times of increasing demand for resources, processing various waste materials is becoming more economically and ecologically viable. Red mud is a waste material that originates from the bauxite process, also known as the Bayer process. Red mud, due to its high alkalinity and heavy metal content, is often stored in landfills, which can lead to accidents such as those in Brazil or Hungary, especially if the storage takes place above ground. Red mud contains not only iron and aluminum residues but also other economically valuable metals such as manganese, titanium, cadmium, or cobalt. Currently, only 4 million tons of the annual production of 150 million tons are utilized in various industries, which is a relatively small amount. Typically, only the iron content is further processed, leaving other potential resources untapped. Chitin has a high binding capacity for various trivalent and divalent metal ions, making it a suitable material for separating red mud into its components. It has been demonstrated that chitin can effectively remove aluminum, barium, cadmium, cobalt, copper, manganese, iron, nickel, lead, strontium, and various lanthanides from a red mud-like sludge. The elements bound to chitin can be easily removed using wet chemistry. Biologically compatible substances are predominantly used in this process, with few exceptions. The removal of elements from red sludge or other mining wastewater using chitin is a viable alternative to traditional mining methods.","PeriodicalId":518524,"journal":{"name":"Polysaccharides","volume":"55 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Characterization of Self-Assembled Highly Stearate-Grafted Hydroxyethyl Starch Conjugates 自组装高硬脂酸酯接枝羟乙基淀粉共轭物的合成与表征

Polysaccharides Pub Date : 2024-06-05 DOI: 10.3390/polysaccharides5020011

Rana Hore, Haroon Rashid, F. Syrowatka, J. Kressler

引用次数: 0

Development of Bilayer Polysaccharide-Based Films Combining Extrusion and Electrospinning for Active Food Packaging 结合挤压和电纺丝技术开发双层多糖基薄膜，用于活性食品包装

Polysaccharides Pub Date : 2024-05-09 DOI: 10.3390/polysaccharides5020010

Rodrigo F. Gouvêa, Cristina T. Andrade

{"title":"Development of Bilayer Polysaccharide-Based Films Combining Extrusion and Electrospinning for Active Food Packaging","authors":"Rodrigo F. Gouvêa, Cristina T. Andrade","doi":"10.3390/polysaccharides5020010","DOIUrl":"https://doi.org/10.3390/polysaccharides5020010","url":null,"abstract":"The development of active food packaging is desirable for food safety and to avoid food loss and waste. In this work, we developed antioxidant bilayer films combining extrusion and electrospinning techniques. These films consisted of a first layer of thermoplastic cornstarch (TPS), incorporated with microcrystalline cellulose (MCC). The second layer consisted of gallic acid (GA) encapsulated at different concentrations in 1:1 chitosan/poly(ethylene-co-vinyl alcohol) (CS/EVOH) nanofibers. This layer was directly electrospun onto the TPS/MCC film. The morphological, structural, wettability, permeability to oxygen, and antioxidant properties were investigated for the first layer and the bilayer films. Water contact angle measurements revealed the hydrophobic nature of the first layer (θ0 = 100.6°). The oxygen permeability (OP) was accessed through the peroxide value (PV) of canola oil, kept in containers covered by the films. PV varied from 66.6 meq/kg for the TPS/MCC layer to 60.5 meq/kg for a bilayer film. Intermolecular hydrogen bonds, mediated by GA, contributed slightly to improving the mechanical strength of the bilayer films. The bilayer film incorporated with GA at 15.0% reached a radical scavenging activity against the DPPH radical of (903.8 ± 62.2) μmol.L−1.Eq. Trolox.g−1. This result proved the effectiveness of the GA nanoencapsulation strategy.","PeriodicalId":518524,"journal":{"name":"Polysaccharides","volume":" 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140997473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bead-Free Electrospun Nanofibrous Scaffold Made of PVOH/Keratin/Chitosan Using a Box–Behnken Experimental Design and In Vitro Studies 采用箱式贝肯实验设计和体外研究，用 PVOH/角蛋白/壳聚糖制成无珠电纺纳米纤维支架

Polysaccharides Pub Date : 2024-05-01 DOI: 10.3390/polysaccharides5020009

Mohammad Tajul Islam, A. Sharmin, Raechel Laing, Michelle A. McConnell, M. A. Ali

{"title":"Bead-Free Electrospun Nanofibrous Scaffold Made of PVOH/Keratin/Chitosan Using a Box–Behnken Experimental Design and In Vitro Studies","authors":"Mohammad Tajul Islam, A. Sharmin, Raechel Laing, Michelle A. McConnell, M. A. Ali","doi":"10.3390/polysaccharides5020009","DOIUrl":"https://doi.org/10.3390/polysaccharides5020009","url":null,"abstract":"Bead-free nanofibrous scaffolds composed of PVOH/keratin/chitosan were prepared using electrospinning after optimising the process parameters using a Box–Behnken experimental design. Two quadratic models were developed to optimise the fibre diameter and the diameter of fibre beads considering the voltage, flow rate, spinning distance, and amount of biopolymer as independent variables. All independent variables were found to be significant in determining responses, although not all interactions among these were significant. The models were highly effective in describing responses, with an R2 of 98.58 and 99.67%. The optimum conditions were determined to be 15.82 kV voltage, 0.25 mL/h flow rate, 105 mm spinning distance, and 30% biopolymers. The accuracy of the models was verified and found to be within an acceptable range. The bead-free nanofibrous scaffold exhibited no cytotoxicity to Human Aneuploid Immortal Keratinocyte (HaCaT) and Normal Human Dermal Fibroblast (NHDF) cell lines, enabling cell adhesion and proliferation. Both cell lines remained attached with perfect cell morphology when co-cultured on the scaffold for 30 days, indicating the scaffold’s potential for biomedical applications.","PeriodicalId":518524,"journal":{"name":"Polysaccharides","volume":"22 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141044706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilization of Multi-Ionic Interaction of Yumoto Hot Springs for Enhancing the Moisturizing Properties of Hyaluronic Acid Sodium Salt 利用汤本温泉的多离子相互作用增强透明质酸钠的保湿特性

Polysaccharides Pub Date : 2024-05-01 DOI: 10.3390/polysaccharides5020008

Keita Nakajima, Tu Minh Tran Vo, Nur Adlin

{"title":"Utilization of Multi-Ionic Interaction of Yumoto Hot Springs for Enhancing the Moisturizing Properties of Hyaluronic Acid Sodium Salt","authors":"Keita Nakajima, Tu Minh Tran Vo, Nur Adlin","doi":"10.3390/polysaccharides5020008","DOIUrl":"https://doi.org/10.3390/polysaccharides5020008","url":null,"abstract":"Hot spring (HS) waters manifest diverse positive effects on the skin due to their unique chemical compositions. Sodium hyaluronate acid (HA) comprises N-acetylglucosamine and D-glucuronic acid, and distinguishes itself with superior qualities in skin regeneration, providing moisturizing and anti-aging benefits. The combination of HA with HS water is widely applied across ophthalmology, pneumology, nutrition, and cosmetics. This study delved into the application of HA in cosmetology, with a focus on its interaction with HS water and its effects on moisture retention and promoting wound healing. In particular, with the alkaline pH levels of the Yumoto HS, HA molecules may undergo dissociation to be ionized resulting in a negatively charged polymer and interacting with positively charged ions in the HS water through electrostatic interactions. The shifted peaks in the FTIR result and zeta potential shifts to a less negative region in the case of HA-HS compared to HA-DI indicate an ionic interaction between HS water and HA. Moisture tests confirmed the sustained hydration when HA is dissolved in HS water, underscoring its potential to improve skin hydration at certain concentrations, specifically at 0.5% and 1%. Additionally, MTT assay results demonstrated that HS water stimulates the growth of fibroblast cells compared to distilled water, implying its potential beneficial effect in wound healing. These findings suggested the multifaceted benefits of HAHS in skincare, highlighting its role in enhancing skin hydration and potentially accelerating wound healing processes, thus presenting avenues for the development of advanced cosmeceutical formulations.","PeriodicalId":518524,"journal":{"name":"Polysaccharides","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141051402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two Important Biopolymers: The Transformative Power of Chitin and Collagen in Multidisciplinary Applications 两种重要的生物聚合物：甲壳素和胶原蛋白在多学科应用中的变革力量

Polysaccharides Pub Date : 2024-04-17 DOI: 10.3390/polysaccharides5020007

Azizur Rahman

引用次数: 0

Surface Modification of Cellulose Nanocrystal Films via RAFT Polymerization for Adsorption of PFAS 通过 RAFT 聚合对纤维素纳米晶薄膜进行表面改性以吸附 PFAS

Polysaccharides Pub Date : 2024-04-13 DOI: 10.3390/polysaccharides5020006

Chaimaa Gomri, B. T. Benkhaled, Arnaud Chaix, Eddy Petit, Marc Cretin, M. Semsarilar

引用次数: 0

Concentrated O/W Emulsion Stability of Non-Ionic Chitosan Oligomer Surfactants Modified by Epoxidized Fatty Chains at pH7: Influence of Emulsification Conditions 经环氧脂肪酸链改性的非离子壳聚糖低聚物表面活性剂在 pH7 值下的浓缩 O/W 乳液稳定性：乳化条件的影响

Polysaccharides Pub Date : 2024-04-11 DOI: 10.3390/polysaccharides5020005

Steve Berthalon, Jérémy Frugier, Nathalie Azema, C. Negrell, Ghislain David

{"title":"Concentrated O/W Emulsion Stability of Non-Ionic Chitosan Oligomer Surfactants Modified by Epoxidized Fatty Chains at pH7: Influence of Emulsification Conditions","authors":"Steve Berthalon, Jérémy Frugier, Nathalie Azema, C. Negrell, Ghislain David","doi":"10.3390/polysaccharides5020005","DOIUrl":"https://doi.org/10.3390/polysaccharides5020005","url":null,"abstract":"In this study, chitosan-based surfactants were synthesized by epoxy–amine chemistry to stabilize concentrated O/W emulsions at pH7. Chitosan was first depolymerized by nitrous deamination to obtain chitooligosaccharides (COS) with degrees of polymerization of 10 (DP10) and 20 (DP20). Then, three different epoxidized fatty chains, i.e., octyl/decyl glycidyl ether (C9), hexadecyl glycidyl ether (C16) and epoxidized cardanol (card), were grafted onto the amine groups of chitosan to form six amphiphilic structures. NMR measurements revealed grafting efficiencies ranging from 1 to 30% while HLB values ranged from 13 to 20. The relationships between these surfactant structures and their adsorption properties were investigated by tensiometric measurements, highlighting the need for a short hydrophilic moiety and high grafting efficiency to obtain the best adsorption. Subsequently, concentrated O/W emulsions (66% of oil) at pH7 were produced using COS-based surfactants and the impact of stirring time and speed during the emulsification process was described through rheological, droplet size and microscopy measurements. Finally, emulsions were stored over 2 months in order to study the destabilization phenomenon into the mixture, i.e., coalescence and creaming, by using laser granulometry and Turbiscan. Results demonstrated that stability could be enhanced by increasing emulsion viscosity, reducing droplet size or optimizing the adsorption layer at the O/W interfaces.","PeriodicalId":518524,"journal":{"name":"Polysaccharides","volume":"11 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Lignocellulose Nanofibril from Desilicated Rice Hull with Carboxymethylation Pretreatment 经羧甲基化预处理的脱盐稻壳木质纤维素纳米纤维的表征

Polysaccharides Pub Date : 2024-01-22 DOI: 10.3390/polysaccharides5010002

A. Zahra, Seohee Lim, Soo-Jeong Shin

引用次数: 0