journal
https://read.qxmd.com/read/38876709/towards-the-preparation-of-sustainable-superplasticizers-for-geopolymeric-pastes-via-radiation-induced-grafting-of-sulfonic-group-bearing-monomers-onto-corn-starch
#21
JOURNAL ARTICLE
Noha M Deghiedy, Safaa M A El-Gamal, Mohamed Ramadan, Alaa Mohsen, Mahmoud M Hazem, Mostafa A Sayed, Fatma M Helmy, Mona M Wetwet, Ahmed E Swilem
To address escalating environmental and sustainability concerns of petroleum-based superplasticizers (SPs), this work aims to develop sustainable and eco-friendly starch-based SPs using gamma radiation for maintaining the desired workability of geopolymeric pastes. Specifically, two green SPs were prepared from starch via radiation-induced grafting of two sulfonic group-bearing monomers, namely 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and 4-styrene sulfonic acid sodium salt (Na4SS). The grafting reaction was improved by initial modification of starch with glycidyl methacrylate to insert vinyl groups into the starch backbone...
October 1, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38876708/glycosaminoglycans-exhibit-distinct-interactions-and-signaling-with-bmp2-according-to-their-nature-and-localization
#22
JOURNAL ARTICLE
Jean Le Pennec, Olga Makshakova, Paola Nevola, Farah Fouladkar, Evelyne Gout, Paul Machillot, Mélanie Friedel-Arboleas, Catherine Picart, Serge Perez, Andrea Vortkamp, Romain R Vivès, Elisa Migliorini
The role of glycosaminoglycans (GAGs) in modulating bone morphogenetic protein (BMP) signaling represents a recent and underexplored area. Conflicting reports suggest a dual effect: some indicate a positive influence, while others demonstrate a negative impact. This duality suggests that the localization of GAGs (either at the cell surface or within the extracellular matrix) or the specific type of GAG may dictate their signaling role. The precise sulfation patterns of heparan sulfate (HS) responsible for BMP2 binding remain elusive...
October 1, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858031/oxidized-reducing-ends-in-celluloses-quantitative-profiling-relative-to-molar-mass-distribution-by-fluorescence-labeling
#23
JOURNAL ARTICLE
David Budischowsky, Irina Sulaeva, Fredrik G Støpamo, Anna F Lehrhofer, Hubert Hettegger, Anikó Várnai, Vincent G H Eijsink, Thomas Rosenau, Antje Potthast
Fluorescence labeling with N-(1-naphthyl)ethylenediamine is highly effective for quantifying oxidized reducing end groups (REGs) in cellulosic materials. When combined with size exclusion chromatography in DMAc/LiCl, along with fluorescence / multiple-angle laser light scattering / refractive index detection, a detailed profile of C1-oxidized REGs relative to the molecular weight distribution of the cellulosic material can be obtained. In this work, the derivatization process was extensively optimized, to be carried out heterogeneously in the solvent N-methyl-2-pyrrolidone...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858030/application-of-maldi-ms-for-characterization-of-fucoidan-hydrolysates-and-screening-of-endo-fucoidanase-activity
#24
JOURNAL ARTICLE
Diego S Reyes-Weiss, Margot Bligh, Nanna Rhein-Knudsen, Jan-Hendrik Hehemann, Manuel Liebeke, Bjørge Westereng, Svein Jarle Horn
Brown macroalgae synthesize large amounts of fucoidans, sulfated fucose-containing polysaccharides, in the ocean. Fucoidans are of importance for their recently discovered contribution to marine carbon dioxide sequestration and due to their potential applications in biotechnology and biomedicine. However, fucoidans have high intra- and intermolecular diversity that challenges assignment of structure to biological function and the development of applications. Fucoidan-active enzymes may be used to simplify this diversity by producing defined oligosaccharides more applicable for structural refinement, characterization, and structure to function assignment for example via bioassays...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858029/the-carrier-function-and-inhibition-effect-on-benign-prostatic-hyperplasia-of-a-glucan-from-epimedium-brevicornu-maxim
#25
JOURNAL ARTICLE
Lingling Yan, Bin Huang, Xueqing Wang, Yuchen Jiang, Jialing Liu, Xiaobin Jia, Liang Feng, Bing Yang
Epimedium, a traditional Chinese medicine commonly used as a dietary supplement, contains polysaccharides and flavonoids as its main bioactive ingredients. In this study, a neutral homogeneous polysaccharide (EPSN-1) was isolated from Epimedium brevicornu Maxim. EPSN-1 was identified as a glucan with a backbone of →4)-α-D-Glcp-(1→, branched units comprised α-D-Glcp-(1→6)-α-D-Glcp-(1→, β-D-Glcp-(1→6)-β-D-Glcp-(1→ and α-D-Glcp-(1→ connected to the C6 position of backbone...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858028/lysine-mediated-surface-modification-of-cellulose-nanocrystal-films-for-multi-channel-anti-counterfeiting
#26
JOURNAL ARTICLE
Songnan Hu, Fengxia Yue, Fang Peng, Xin Zhou, Yian Chen, Tao Song, Haisong Qi
Utilizing advanced multiple channels for information encryption offers a powerful strategy to achieve high-capacity and highly secure data protection. Cellulose nanocrystals (CNCs) offer a sustainable resource for developing information protection materials. In this study, we present an approach that is easy to implement and adapt for the covalent attachment of various fluorescence molecules onto the surface of CNCs using the Mannich reaction in aqueous-based medium. Through the use of the Mannich reaction-based surface modification technique, we successfully achieved multi-color fluorescence in the resulting CNCs...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858027/engineered-inulin-based-hybrid-biomaterials-for-augmented-immunomodulatory-responses
#27
REVIEW
Ashok Kumar Jangid, Kyung Mu Noh, Sungjun Kim, Kyobum Kim
Modified biopolymers that are based on prebiotics have been found to significantly contribute to immunomodulatory events. In recent years, there has been a growing use of modified biomaterials and polymer-functionalized nanomaterials in the treatment of various tumors by activating immune cells. However, the effectiveness of immune cells against tumors is hindered by several biological barriers, which highlights the importance of harnessing prebiotic-based biopolymers to enhance host defenses against cancer, thus advancing cancer prevention strategies...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858026/a-feasibility-study-on-femtosecond-laser-texturing-of-sprayed-nanocellulose-coatings
#28
JOURNAL ARTICLE
Pieter Samyn, Joris Everaerts, Akshay Mundayadan Chandroth, Patrick Cosemans, Olivier Malek
Nanocelluloses are emerging as natural materials with favourable properties for coating industry and can be applied by state-of-the-art spraying technology. While additional functionalities are commonly introduced through chemical modification, the surface microstructuring of nanocellulose coatings with high throughput methods remains unexplored. Here, a femtosecond laser is used for texturing spray-coated coatings made of cellulose nanofibrils (CNF) or cellulose nanocrystals (CNC). For coating thickness of 1...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858025/%C3%AE-cyclodextrin-carbon-dots-grafted-cellulose-nanofibrils-hydrogel-for-enhanced-adsorption-and-fluorescence-detection-of-levofloxacin
#29
JOURNAL ARTICLE
Yuting Zhang, Xinmiao Qi, Xuefeng Zhang, Yong Huang, Qiang Ma, Xin Guo, Yiqiang Wu
In this study, a novel hydrogel, β-cyclodextrin/carbon dots-grafted cellulose nanofibrils hydrogel (βCCH), was fabricated for removal and fluorescence determination of levofloxacin (LEV). A comprehensive analysis was performed to characterize its physicochemical properties. Batch adsorption experiments were conducted, revealing that βCCH reached a maximum adsorption capacity of 1376.9 mg/g, consistent with both Langmuir and pseudo-second-order models, suggesting that the adsorption process of LEV on βCCH was primarily driven by chemical adsorption...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858024/heat-moisture-treatment-of-freshly-harvested-high-amylose-maize-kernels-improves-its-starch-thermal-stability-and-enzymatic-resistance
#30
JOURNAL ARTICLE
Zhonghua Gu, Gaomin Cheng, Xianying Sha, Haochen Wu, Xinwei Wang, Renyong Zhao, Qiang Huang, Yinong Feng, Jihua Tang, Hongxin Jiang
The objective of this work was to study the effects of heat-moisture treatment (HMT) of freshly harvested mature high-amylose maize (HAM) kernels on its starch structure, properties, and digestibility. Freshly harvested HAM kernels were sealed in Pyrex glass bottles and treated at 80 °C, 100 °C, or 120 °C. HMT of HAM kernels had no impact on its starch X-ray diffraction pattern but increased the relative crystallinity. This result together with the increased starch gelatinization temperatures and enthalpy change indicated starch molecules reorganization forming long-chain double-helical crystalline structure during HMT of HAM kernels...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858023/porous-cationic-cellulose-beads-prepared-by-homogeneous-in-situ-quaternization-and-acid-induced-regeneration-for-water-moisture-absorption
#31
JOURNAL ARTICLE
Feng Xu, Byoung-Uk Cho
Chemical modification is a reliable and efficient strategy for designing cellulose-based functional materials. Herein, porous quaternized cellulose beads (QCBs) as cationic superabsorbent were fabricated by homogeneous in-situ chemical grafting cellulose molecular chains with glycidyl trimethylammonium chloride (GTAC) in tetraethylammonium hydroxide (TEAOH)/urea aqueous solution followed by acetic acid induced regeneration. The influence of GTAC dosage on the physicochemical-structural properties of cationic QCBs was deeply investigated...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858022/alternative-proton-exchange-membrane-based-on-a-bicomponent-anionic-nanocellulose-system
#32
JOURNAL ARTICLE
Fernanda Brito Dos Santos, Joice Kaschuk, Gabriel Banvillet, Adel Jalaee, Orlando J Rojas, E Johan Foster
As integral parts of fuel cells, polymer electrolyte membranes (PEM) facilitate the conversion of hydrogen's chemical energy into electricity and water. Unfortunately, commercial PEMs are associated with high costs, limited durability, variable electrochemical performance and are based on perfluorinated polymers that persist in the environment. Nanocellulose-based PEMs have emerged as alternative options given their renewability, thermal and mechanical stability, low-cost, and hydrophilicity. These PEMs take advantage of the anionic nature of most nanocelluloses, as well as their facile modification with conductive functional groups, for instance, to endow ionic and electron conductivity...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858021/zwitterionic-cellulose-nanofibers-based-hydrogels-with-high-toughness-ionic-conductivity-and-healable-capability-in-cryogenic-environments
#33
JOURNAL ARTICLE
Ruiheng Han, Fan Zeng, Qingqing Xia, Xiangchao Pang, Xianzhang Wu
Extreme environmental conditions often lead to irreversible structural failure and functional degradation in hydrogels, limiting their service life and applicability. Achieving high toughness, self-healing, and ionic conductivity in cryogenic environments is vital to broaden their applications. Herein, we present a novel approach to simultaneously enhance the toughness, self-healing, and ionic conductivity of hydrogels, via inducing non-freezable water within the zwitterionic cellulose-based hydrogel skeleton...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858020/a-new-3d-printing-strategy-by-enhancing-shear-induced-alignment-of-gelled-nanomaterial-inks-resulting-in-stronger-and-ductile-cellulose-films
#34
JOURNAL ARTICLE
Yunxia Yang, Dan Li, Ning Yan, Fu Guo
Cellulose nanofibrils (CNFs) are derived from biomass and have significant potential as fossil-based plastic alternatives used in disposable electronics. Controlling the nanostructure of fibrils is the key to obtaining strong mechanical properties and high optical transparency. Vacuum filtration is usually used to prepare the CNFs film in the literature; however, such a process cannot control the structure of the CNFs film, which limits the transparency and mechanical strength of the film. Here, direct ink writing (DIW), a pressure-controlled extrusion process, is proposed to fabricate the CNFs film, which can significantly harness the alignment of fibrils by exerting shear stress force on the filaments...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858019/structural-characteristics-immune-activating-mechanisms-in-vitro-and-immunomodulatory-effects-in-vivo-of-the-exopolysaccharide-eps53-from-streptococcus-thermophilus-xj53
#35
JOURNAL ARTICLE
Yun Yue, Jin Han, Xinyan Shen, Fei Zhu, Yikang Liu, Wenqing Zhang, Wei Xia, Mengqi Wu
Our previous investigations have successfully identified the repeating structural units of EPS53, an exopolysaccharide derived from Streptococcus thermophilus XJ53 fermented milk, and substantiated its potential immunomodulatory properties. The present study further elucidated the structural characteristics of EPS53 and investigated the underlying mechanisms governing its in vitro immunoreactivity as well as its in vivo immunoreactivity. The results obtained from multi-detector high performance gel filtration chromatography revealed that EPS53 adopted a rigid rod conformation in aqueous solution, with the weight-average molecular weight of 1464 kDa, the number-average molecular weight of 694 kDa, and the polydispersity index of 2...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858018/structural-elucidation-and-functional-characteristics-of-novel-potential-prebiotics-produced-from-limosilactobacillus-reuteri-n1-gtfb-treated-maize-starches
#36
JOURNAL ARTICLE
Jingjing Dong, Yanli Wang, Ying Chen, Qin Wang, Bo Zhang, Xiaoxiao Li, Zhengyu Jin, Yuxiang Bai
The recently characterized Limosilactobacillus reuteri N1 GtfB (LrN1 GtfB) from glycoside hydrolase family 70 is a novel 4,6-α-glucanotransferase acting on starch/maltooligosaccharides with high enzyme activity and soluble protein yield (in heterogenous system). In this study, the influence of the treatment by LrN1 GtfB on the fine structure and functional characteristics of three maize starches were furtherly investigated and elucidated. Due to the treatment of LrN1 GtfB, the starch molecules were transformed into reuterans containing linear and branched (α1 → 6) linkages with notably smaller molecular weight and shorter chain length...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858017/a-versatile-bilayer-smart-packaging-based-on-konjac-glucomannan-alginate-for-maintaining-and-monitoring-seafood-freshness
#37
JOURNAL ARTICLE
Shiqi Li, Xuerong Hu, Shuo Zhang, Jiale Zhao, Ruinan Wang, Leran Wang, Xingnan Wang, Yahong Yuan, Tianli Yue, Rui Cai, Zhouli Wang
This study introduces a novel multi-functional double-layer intelligent packaging. It focuses on developing a dual-function system capable of real-time monitoring and freshness preservation. Specifically, cellulose nanocrystalline (CNC) was obtained through acid hydrolysis, and then CNC/soybean protein isolate (CNC/SPI) complex colloid particles were prepared via antisolvent method. These particles served as stabilizers to prepare oil-in-water (O/W) cinnamon essential oil Pickering emulsion (CSCEO). The CSCEO was then integrated into the emulsified hydrophobic layer of a konjac glucomannan (Kgm) matrix through intermolecular hydrogen bonding...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858016/a-short-linear-glucan-nanocomposite-hydrogel-formed-by-in-situ-self-assembly-with-highly-elastic-fatigue-resistant-and-self-recovery
#38
JOURNAL ARTICLE
Jinling Zou, Zhiwei Lin, Linjie Zhan, Yang Qin, Qingjie Sun, Na Ji, Fengwei Xie
Polyacrylamide (PAM) hydrogels are widely used in wide-ranging applications in biology, medicine, pharmaceuticals and environmental sectors. However, achieving the requisite mechanical properties, fatigue resistance, self-recovery, biocompatibility, and biodegradability remains a challenge. Herein, we present a facile method to construct a nanocomposite hydrogel by integrating short linear glucan (SLG), obtained by debranching waxy corn starch, into a PAM network through self-assembly. The resulting composite hydrogel with 10 % SLG content exhibited satisfactory stretchability (withstanding over 1200 % strain), along with maximum compressive and shear strengths of about 490 kPa and 39 kPa at 90 % deformation, respectively...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858015/low-density-methacrylated-pea-corn-and-tapioca-starch-covalent-cryogels-with-excellent-elasticity-and-water-oil-absorption-capacity
#39
JOURNAL ARTICLE
Yuqing Liu, Wen Zhong, Malcolm Xing
Porous starch materials are promising in several applications as renewable natural biomaterials. This study reports an approach combining methacrylation of starch and chemical crosslinked cryogelation to fabricate highly elastic macroporous starch (ST-MA) cryogels with impressed water/oil absorption capacity and wet thermal stability among starch based porous materials. Five different types of starch, including pea, normal corn, high amylose corn, tapioca, and waxy maize starch with different amylose content, have been studied...
September 15, 2024: Carbohydrate Polymers
https://read.qxmd.com/read/38858014/homogeneous-films-from-amphiphilic-hyaluronan-and-their-characterization-by-confocal-microscopy-and-nanoindentation
#40
JOURNAL ARTICLE
Jiří Mrázek, Jaroslav Sita, František Ondreáš, Alexandr Zubov, Josef Chmelař
Self-supporting films from amphiphilic hyaluronan are suitable for medical applications like wound dressings or resorbable implants. These films are typically cast from water/alcohol solutions. However, when the mixed solvent evaporates in ambient air, convection flows develop in the solution and become imprinted in the film, potentially compromising its properties. Consequently, we developed a novel film manufacturing method: drying in a closed box under saturated vapour conditions. Using this approach, we prepared a series of optically clear lauroyl-hyaluronan (LHA) films with uniform thickness and compared them to their air-dried counterparts...
September 15, 2024: Carbohydrate Polymers
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