Biopolymers最新文献_第3页

Thermite frass biomass and surface modified biowaste coir fiber reinforced biocomposites-Conversion of waste to useful products. 热熔碎屑生物质和表面改性生物废弃物椰壳纤维增强生物复合材料--将废弃物转化为有用产品。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-19 DOI: 10.1002/bip.23616

Justin Abraham Sajin, Vaithilingam Shanmugavelayutham Sreenivasan, Brailson Mansingh Bright, Murugan Sundaram Senthil Saravanan, Trijo Tharayil, Raveendra Kurup Anish, Manikandan Natarajan, Govindarajan Bharathiraja, Joseph Selvi Binoj

{"title":"Thermite frass biomass and surface modified biowaste coir fiber reinforced biocomposites-Conversion of waste to useful products.","authors":"Justin Abraham Sajin, Vaithilingam Shanmugavelayutham Sreenivasan, Brailson Mansingh Bright, Murugan Sundaram Senthil Saravanan, Trijo Tharayil, Raveendra Kurup Anish, Manikandan Natarajan, Govindarajan Bharathiraja, Joseph Selvi Binoj","doi":"10.1002/bip.23616","DOIUrl":"https://doi.org/10.1002/bip.23616","url":null,"abstract":"Polymer composites are known for its light weight and specific mechanical characteristics. This study examines sodium hydroxide (NaOH)-treated coir fiber, an agro-leftover, stuffed in a polyester matrix with termite frass powder, a bio-leftover for possible use in light-weight structural applications. Composite samples were made using compression molding and NaOH-treated coir fiber reinforced hybrid polymer composite (TCRHPC) with 40 wt% treated coir fiber and 1, 2, 3, and 4 wt% termite frass powder. TCRHPC samples mechanical, water captivation, tribological, and thermal properties were affected by termite frass powder wt%. The TCRHPC sample with 3 wt% termite frass powder has excellent mechanical properties, which improved by tensile (41.6%), flexural (28.57%), impact (43.7%), and hardness (18.84%) properties. With perfect water captivation and low weight increases in normal water (0.017 g), seawater (0.015 g), and NaOH solution (0.010 g), the identical composite sample with thermal stability up to 238°C also reduced wear mass by 5.27%. Conversely, filler agglomeration and heterogeneous dispersion in composite sample impair thermo-mechanical characteristics of TCRHPC containing 4 wt% termite frass powder. The bonding among polyester, treated coir fiber, and termite frass powder in composites were appraised with the aid of fractographic images of TCRHPC samples. The results show that TCRHPC material suits well for support structures requiring lesser weight.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141730964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new application of avocado oil to enrich the biological activities of polycaprolactone membranes for tissue engineering. 牛油果油在丰富组织工程聚己内酯膜生物活性方面的新应用。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-19 DOI: 10.1002/bip.23617

Merve Çapkın Yurtsever, Selin Aydoğan, Zeynep İyigündoğdu, Alican Cömertpay, Didem Demir, Seda Ceylan

{"title":"A new application of avocado oil to enrich the biological activities of polycaprolactone membranes for tissue engineering.","authors":"Merve Çapkın Yurtsever, Selin Aydoğan, Zeynep İyigündoğdu, Alican Cömertpay, Didem Demir, Seda Ceylan","doi":"10.1002/bip.23617","DOIUrl":"https://doi.org/10.1002/bip.23617","url":null,"abstract":"The metabolites synthesized by plants to protect themselves serves as natural antimicrobial agents used in biomaterials. In this study, avocado oil (AO), was incorporated as a plant source and natural antimicrobial agent into polycaprolactone (PCL) membranes. The effects of varying AO ratios (25, 50, and 100 wt%.-PCL@25AO, PCL@50AO, PCL@100AO) on PCL membrane morphology, chemical structure, wettability, antimicrobial activity, and cell viabilities were investigated. It was demonstrated that the AO acts as a pore-forming agent in solvent-casted membranes. Young's modulus of the membranes varied between 602.68 and 31.92 MPa and more flexible membranes were obtained with increasing AO content. Inhibition zones of AO were recorded between 7.86 and 13.97 mm against clinically relevant microbial strains including bacteria, yeast, and fungi. Antimicrobial activity of AO was retained in PCL membranes at all ratios. Resazurin assay indicated that PCL@25AO membranes were cytocompatible with mouse fibroblast cells (L929 cell line) on day 6 showing 72.4% cell viability with respect to neat PCL membranes. Viability results were supported by scanning electron microscopy images and DAPI staining. The overall results of this study highlight the potential of PCL@25AO membranes as a biomaterial with antimicrobial properties, cytocompatibility, and mechanical strength suitable for various biomedical applications.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141730963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Defined folding pattern of poly(rG) supports inherent ability to encode biological information. 定义的 poly(rG) 折叠模式支持编码生物信息的内在能力。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-14 DOI: 10.1002/bip.23615

Nickolas Kankia, Levan Lomidze, Skylar Stevenson, Karin Musier-Forsyth, Besik Kankia

{"title":"Defined folding pattern of poly(rG) supports inherent ability to encode biological information.","authors":"Nickolas Kankia, Levan Lomidze, Skylar Stevenson, Karin Musier-Forsyth, Besik Kankia","doi":"10.1002/bip.23615","DOIUrl":"https://doi.org/10.1002/bip.23615","url":null,"abstract":"The RNA World hypothesis posits that RNA can represent a primitive life form by reproducing itself and demonstrating catalytic activity. However, this hypothesis is incapable of addressing several major origin-of-life (OoL) questions. A recently described paradox-free alternative OoL hypothesis, the Quadruplex (G4) World, is based on the ability of poly(dG) to fold into a stable architecture with an unambiguous folding pattern using G-tetrads as building elements. Because of the folding pattern of three G-tetrads and single-G loops, dG15 is programmable and has the capability to encode biological information. Here, we address two open questions of the G4 World hypothesis: (1) Does RNA follow the same folding pattern as DNA? (2) How do stable quadruplexes evolve into the present-day system of information transfer, which is based on Watson-Crick base pair complementarity? To address these questions, we systematically studied the thermodynamic and optical properties of both DNA and RNA G15- and G3T (GGGTGGGTGGGTGGG)-derived sequences. Our study revealed that similar to DNA sequences, RNAs adopt quadruplexes with only three G-tetrads. Thus, both poly(dG) and poly(rG) possess inherent ability to fold into 3D quadruplex architecture with strictly defined folding pattern. The study also revealed that despite high stability of both DNA and RNA quadruplexes, they are vulnerable to single-nucleotide substitutions, which drop the thermal stability by ~40°C and can facilitate introduction of the complementarity principle into the G4 World.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141615881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the physicochemical, antimicrobial and antioxidant properties of chitosan film containing zero-valent iron nanoparticles and oregano essence. 研究含有零价铁纳米粒子和牛至精的壳聚糖薄膜的理化、抗菌和抗氧化特性。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-12 DOI: 10.1002/bip.23614

Farzaneh Khalil Khodaparast, Sajad Pirsa, Farzad Mirab Toupchi, Forogh Mohtarami

{"title":"Investigating the physicochemical, antimicrobial and antioxidant properties of chitosan film containing zero-valent iron nanoparticles and oregano essence.","authors":"Farzaneh Khalil Khodaparast, Sajad Pirsa, Farzad Mirab Toupchi, Forogh Mohtarami","doi":"10.1002/bip.23614","DOIUrl":"https://doi.org/10.1002/bip.23614","url":null,"abstract":"The problems caused by the pollution of the environment by petroleum polymers in recent years have caused researchers to think of replacing petroleum polymers with biodegradable and natural polymers. The aim of this research was to produce composite film of chitosan (Chit)/zero-valent iron (Fe) nanoparticles/oregano essence (Ess) (Chit/Fe/Ess). Central composite design was used to study physical, morphological, antioxidant and antimicrobial properties of films. The results showed that with the increase of iron nanoparticles and oregano essence, the thickness of the film increased. The moisture, solubility and water vapor permeability of the film decreased with the increase of iron nanoparticles and oregano essence. The results of the mechanical test showed that with the increase of iron nanoparticles and oregano essence, the tensile strength and elongation at break point decreased. Iron nanoparticles and oregano essence increased significantly the antioxidant activity of the film. The results of the antimicrobial activity of the prepared films show that the addition of iron nanoparticles and oregano essence enhanced the antimicrobial activity of the film against Escherichia coli and Staphylococcus aureus. X-ray diffraction analysis showed that iron nanoparticles were physically combined with chitosan polymer. Fourier transform infrared (FTIR) results confirmed the physical presence of iron nanoparticles and oregano essence in the polymer matrix. The results of scanning electron microscopy (SEM) showed that the surface of nanocomposite films is more heterogeneous than chitosan. Iron nanoparticles and oregano essence could delay the thermal decomposition of chitosan and increase the thermal stability of chitosan film.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silk fibroin/vitreous humor hydrogel scaffold modified by a carbodiimide crosslinker for wound healing. 经碳化二亚胺交联剂改性的丝纤维素/玻璃体水凝胶支架用于伤口愈合。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-12 DOI: 10.1002/bip.23612

Sepideh Rafiei, Marjan Ghanbari-Abdolmaleki, Reza Zeinali, Saeed Heidari-Keshel, Azam Rahimi, Farima Royanian, Davood Zaeifi, Kiana Taheri, Kimia Pourtaghi, Maryam Khaleghi, Esmaeil Biazar

{"title":"Silk fibroin/vitreous humor hydrogel scaffold modified by a carbodiimide crosslinker for wound healing.","authors":"Sepideh Rafiei, Marjan Ghanbari-Abdolmaleki, Reza Zeinali, Saeed Heidari-Keshel, Azam Rahimi, Farima Royanian, Davood Zaeifi, Kiana Taheri, Kimia Pourtaghi, Maryam Khaleghi, Esmaeil Biazar","doi":"10.1002/bip.23612","DOIUrl":"https://doi.org/10.1002/bip.23612","url":null,"abstract":"Natural-derived biomaterials can be used as substrates for the growth, proliferation, and differentiation of cells. In this study, bovine vitreous humor as a biological material was cross-linked to silk fibroin with different concentration ratios to design a suitable substrate for corneal tissue regeneration. The cross-linked samples were evaluated with different analyses such as structural, physical (optical, swelling, and degradation), mechanical, and biological (viability, cell adhesion) assays. The results showed that all samples had excellent transparency, especially those with higher silk fibroin content. Increasing the ratio of vitreous humor to silk fibroin decreased mechanical strength and increased swelling and degradation, respectively. There was no significant difference in the toxicity of the samples, and with the increase in vitreous humor ratio, adhesion and cell proliferation increased. Generally, silk fibroin with vitreous humor can provide desirable characteristics as a transparent film for corneal wound healing.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of polydopamine-modified cellulose hydrogel for controlled release of α-mangostin. 制备聚多巴胺改性纤维素水凝胶，用于控制α-芒果菌素的释放。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-11 DOI: 10.1002/bip.23613

Hoang Lich Phan, Ngoc Cam Trang Tran, Thi Hoang Yen Le, Quoc-Viet Le, Tran-Thai-Duong Le, Ut Dong Thach

{"title":"Fabrication of polydopamine-modified cellulose hydrogel for controlled release of α-mangostin.","authors":"Hoang Lich Phan, Ngoc Cam Trang Tran, Thi Hoang Yen Le, Quoc-Viet Le, Tran-Thai-Duong Le, Ut Dong Thach","doi":"10.1002/bip.23613","DOIUrl":"https://doi.org/10.1002/bip.23613","url":null,"abstract":"Hydrogels are notable for their outstanding absorbent qualities, satisfactory compatibility with biological systems, ability to degrade, and inherent safety, all of which contribute to their high demand in the field of biomedicine. This study focuses on the fabrication of hydrogels using environmentally friendly cellulosic material. Cellulose hydrogel beads were prepared by physical cross-linking in a NaOH/urea medium. Furthermore, nano polydopamine was integrated into the hydrogel matrix as functional polymers and α-mangostin was employed as an active pharmaceutical ingredient. The physicochemical properties were comprehensively analyzed using Fourier-transform infrared spectrometer, 13C cross-polarization/magic angle spinning nuclear magnetic resonance, thermogravimetric analysis, and scanning electron microscope. The drug delivery properties, including water content, swelling ratio, and drug release profiles, were evaluated. In vitro cytotoxicity against MC3T3-E1 cells was assessed using sulforhodamine B staining. All test hydrogels exhibited inhibitory activity against the growth of MC3T3-E1 cells. These results indicated the potential use of these hydrogels as a drug delivery carrier for α-mangostin in the treatment of ankylosing spondylitis.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141578915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","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 cellulose nanocrystals from Zhombwe (Neorautanenia brachypus (harms) CA Sm.) bagasse. Zhombwe（Neorautanenia brachypus (harms) CA Sm.）甘蔗渣中纤维素纳米晶体的表征。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-10 DOI: 10.1002/bip.23611

Rumbidzai A Makanda, Zedias Chikwambi, Chrispen Murungweni, Hamilton Kakwere, Arnold B Mashingaidze

{"title":"Characterization of cellulose nanocrystals from Zhombwe (Neorautanenia brachypus (harms) CA Sm.) bagasse.","authors":"Rumbidzai A Makanda, Zedias Chikwambi, Chrispen Murungweni, Hamilton Kakwere, Arnold B Mashingaidze","doi":"10.1002/bip.23611","DOIUrl":"https://doi.org/10.1002/bip.23611","url":null,"abstract":"Increased awareness of environmental pollution has changed focus to the use of biodegradable materials because they lack persistence in the environment. This article focused on the production of cellulose nanocrystals from Zhombwe, Neorautanenia brachypus (Harms) CA Sm. bagasse using steam explosion, alkaline treatment, bleaching, purification, and acid hydrolysis. The chemical composition after the treatments was determined using TAPPI standards. Further characterization was done using x-ray Diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The nanoscale dimensions and morphology of the extracted nanocrystals was determined through field emission scanning electron microscopy (FE-SEM). FTIR spectroscopy and DSC confirmed the removal of noncellulosic compounds. XRD revealed that N. brachypus bagasse contained cellulose type I, which partly endured morphological change to polymorph II after purification and hydrolysis. FE-SEM revealed elliptical to rod-shaped structures after acid hydrolysis, which had a mean length and width of 1103 nm and 597 nm respectively. TAPPI tests revealed that successive chemical treatments increased crystallinity by 29.7%, enriched cellulose content by 74.2%, reduced lignin content by 21.7%, and reduced hemicellulose to less than 1%. The semicrystalline nature of the material produced in our work is a promising candidate for swelling hydrogel applications in areas such as wound dressing, heavy metal removal, controlled drug delivery, agriculture, and sanitary products. Future studies may focus on surface modification of nanocrystals to improve their thermal stability and therefore expand their range for potential industrial applications.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141562577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the architecture of starch granules revealed by iodine vapor binding and lintnerization. Part 1: Microscopic examinations. 通过碘蒸气结合和线粒体化揭示淀粉颗粒的结构。第 1 部分：显微镜检查。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-07-02 DOI: 10.1002/bip.23610

Eric Bertoft, George Annor, Varatharajan Vamadevan, Amy Hui-Mei Lin

{"title":"On the architecture of starch granules revealed by iodine vapor binding and lintnerization. Part 1: Microscopic examinations.","authors":"Eric Bertoft, George Annor, Varatharajan Vamadevan, Amy Hui-Mei Lin","doi":"10.1002/bip.23610","DOIUrl":"https://doi.org/10.1002/bip.23610","url":null,"abstract":"Structural nature of glucan chains in the amorphous part of granular starch was examined by iodine vapor treatment and lintnerization. Four iodine-stained amylose-containing normal starches and their waxy counterparts were examined under a microscope before, during, and after lintnerization. The presence of amylose retarded the lintnerization rate. The degree of retardation correlated with the structural type of the amylopectin component, suggesting that potato amylopectin (type 4 structure) interacts with amylose in the granules, whereas in barley granules (type 1 structure) the interaction is very weak. The inclusion complexes with iodine were not degraded by the acid treatment. Therefore, the iodine-glucan chain complex formation could be used to study the structural nature of the flexible, amorphous parts of the starch granules. Indeed, at the end of lintnerization, when 20%-30% of the granules remained, substantial amounts of blue-stained complexes were washed out from the granules especially from amylose-containing barley and maize starch, but also from both normal and waxy cassava and potato starch. The complexation with iodine did not affect the rate of lintnerization. This suggested that single helical structures were present during lintnerization also in the absence of iodine and this conformation was the reason for the acid resistance.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141490678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4-nitrophenol 制备负载氧化亚铜纳米颗粒的纳米纤维素/还原氧化石墨烯基质，用于高效催化还原 4-硝基苯酚。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-06-26 DOI: 10.1002/bip.23608

Faouzia Khili, Amel Dakhlaoui Omrani

{"title":"Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4-nitrophenol","authors":"Faouzia Khili, Amel Dakhlaoui Omrani","doi":"10.1002/bip.23608","DOIUrl":"10.1002/bip.23608","url":null,"abstract":"The paper reports on the preparation of cellulose nanocrystals/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles (CNC/rGO-Cu2O) through a simple solvothermal method and its application for 4-nitrophenol reduction to 4-aminophenol using sodium borohydride. The CNC/rGO-Cu2O nanocomposite was formed chemically by first mixing CNC and graphene oxide (GO) followed by complexation of the negatively charged functional groups of CNC/GO with Cu2+ ions and subsequent heating at 100°C. This resulted in the simultaneous reduction of GO to rGO and the formation of Cu2O nanoparticles. The as-elaborated nanocomposite was firstly characterized using different techniques such as atomic force microscopy, scanning electron microscopy, transmission electron microscopy, UV–Vis spectrophotometry, Raman spectroscopy and x-ray photoelectron spectroscopy. Then, it was successfully applied for efficient catalytic reduction of 4-nitrophenol to 4-aminophenol using sodium borohydride: the reduction was completed in about 6 min. After eight times use, the catalyst still maintained good catalytic performance. Compared to CNC/rGO, rGO/Cu2O and free Cu2O nanoparticles, the CNC/rGO-Cu2O nanocomposite exhibits higher catalytic activity even at lower copper loading.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141454991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

pH-response of protein-polysaccharide multilayers adsorbed on a flat gold surface: A surface plasmon resonance study 吸附在平坦金表面的蛋白质-多糖多层膜的 pH 响应：表面等离子体共振研究。

IF 3.2 4区生物学

Biopolymers Pub Date : 2024-06-20 DOI: 10.1002/bip.23609

Nikolitsa Katsenou, Nikolaos Spiliopoulos, Dimitrios L. Anastassopoulos, Aristeidis Papagiannopoulos, Chris Toprakcioglu

{"title":"pH-response of protein-polysaccharide multilayers adsorbed on a flat gold surface: A surface plasmon resonance study","authors":"Nikolitsa Katsenou, Nikolaos Spiliopoulos, Dimitrios L. Anastassopoulos, Aristeidis Papagiannopoulos, Chris Toprakcioglu","doi":"10.1002/bip.23609","DOIUrl":"10.1002/bip.23609","url":null,"abstract":"Polysaccharide-protein multilayers (PPMLs) consisting of bovine serum albumin (BSA) and chondroitin sulfate (CS) are assembled in acidic solution (pH 4.2) via layer-by-layer deposition method. The formation of PPMLs on gold surface and their responsiveness to pH change from 4.2 to 7 is investigated by Surface Plasmon Resonance Spectroscopy. The buildup of the multilayer at pH 4.2 exhibits non-linear growth while the formation of the first layers is strongly affected by the physicochemical properties of the gold surface. Neutral solution (pH 7) affects the interactions between the biopolymers and results in a partially disassemble (disintegration) of the multilayer film. On one hand, the single pair of layers, BSA-CS and the double pair of layers, (BSA-CS)2, assemblies are stable in neutral pH, a result that will be of interest for biomedical applications. On the other hand, multilayer films consisting of more than four layers that is (BSA-CS)2<n<5, disintegrated down to the 4-layered structure by changing pH to neutral, a fact that renders the (BSA-CS)n assembly useful in the field of drug and protein delivery. The residual mass after the disintegration of the assembly never falls below the mass of four layers. The disintegrated multilayer film can be reconstructed and disassembled repeatedly, simply by cycling the pH value.","PeriodicalId":8866,"journal":{"name":"Biopolymers","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141426250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0