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Nunes GP, Delbem ACB, Gonçalves FMC, Rischka K, de Camargo ER, Sousa YTCS, Danelon M. Biomineralization and remineralizing potential of toothpastes containing nanosized β-calcium glycerophosphate: an in vitro study. Odontology 2024:10.1007/s10266-024-00927-z. [PMID: 38498244 DOI: 10.1007/s10266-024-00927-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/01/2024] [Indexed: 03/20/2024]
Abstract
To evaluate the effect of 1100 ppm F toothpastes supplemented with micrometric or nanosized β-CaGP (β-CaGPm/β-CaGPn) on artificial enamel remineralization, using a pH cycling model. Enamel blocks with artificial caries were randomly allocated into ten groups (n = 10), according to the toothpastes: without fluoride/β-CaGPm/β-CaGPn (negative control); 1100 ppm F (1100F); 1100F plus 0.125%, 0.25%, 0.5%, and 1.0% of β-CaGPm or β-CaGPn. The blocks were treated 2×/day with slurries of toothpastes. After pH cycling, the percentage of surface hardness recovery (%SHR); integrated loss of subsurface hardness (ΔKHN); integrated mineral loss (ΔIMR); fluoride (F), calcium (Ca), and phosphorus (P) concentrations in the enamel; polydispersity index (PdI); and zeta potential (Zp) were determined. The data were analyzed by ANOVA (p < 0.001). For Zp/PdI, no significance was observed when comparing the means (p > 0.001). The treatment with 1100F-0.25%β-CaGPn led to %SHR ∼57 higher when compared to the 1100F group (p < 0.001). The lowest ΔKHN was observed for the 1100F-0.25%β-CaGPn group (p < 0.001). The ΔIMR was lower (∼201%) for the 1100F-0.25%β-CaGPn when compared to 1100F (p < 0.001). The association of β-CaGPm and β-CaGPn to 1100F did not influence its F concentration (p > 0.001). The highest increase in Ca and P was observed for 1100F-0.25%β-CaGPn (p < 0.001). The addition of 0.25%β-CaGPn to 1100F toothpaste was able to promote an additional remineralizing effect of artificial caries lesions.
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Affiliation(s)
- Gabriel Pereira Nunes
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba, SP, Cep 16015-050, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba, SP, Cep 16015-050, Brazil
| | - Francyenne Maira Castro Gonçalves
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba, SP, Cep 16015-050, Brazil
| | - Klaus Rischka
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359, Bremen, Germany
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas-UNICAMP, Piracicaba, 13414-903, Brazil
| | - Emerson Rodrigues de Camargo
- LIEC-Department of Chemistry, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, 13565-905, Brazil
| | | | - Marcelle Danelon
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba, SP, Cep 16015-050, Brazil.
- School of Dentistry, University of Ribeirão Preto-UNAERP, Ribeirão Preto, SP, Cep 14096-900, Brazil.
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Ortiz MIG, Corrales Ureña YR, Aguiar FHB, Lima DANL, Rischka K. Enzymatically Driven Mineralization of a Calcium-Polyphosphate Bleaching Gel. Bioengineering (Basel) 2024; 11:83. [PMID: 38247960 PMCID: PMC10813067 DOI: 10.3390/bioengineering11010083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 01/23/2024] Open
Abstract
To examined alkaline phosphatase enzyme (ALP) activity and the effects of incorporating it in the thickener solution of a hydrogen-peroxide-based bleaching gel containing calcium-polyphosphate (CaPP) on the orthophosphate (PO43-) levels, bleaching effectiveness, and enamel microhardness. ALP activity was assessed at different pH levels and H2O2 concentrations, and in H2O- and Tris-based thickeners. Circular dichroism (CD) was used to examine the ALP secondary structure in water-, Tris-, or H2O2-based mediums. The PO43- levels were evaluated in thickeners with and without ALP. Enamel/dentin specimens were allocated into the following groups: control (without bleaching); commercial (Whiteness-HP-Maxx); Exp-H (H2O-based); CaPP-H; ALP-H (CaPP+ALP); Exp-T (Tris-based); CaPP-T; and ALP-T (CaPP+ALP). Color changes (ΔE/ΔE00) and the bleaching index (ΔWID) were calculated, and surface (SMH) and cross-sectional microhardness (CSMH) were assessed. The two-way ANOVA and Tukey's post-hoc tests were used to compare ALP and PO43- levels; generalized linear models were used to examine: ΔE/ΔE00/SMH/CSMH; and Kruskal-Wallis and Dunn's tests were used for ΔWID (α = 5%). The ALP activity was higher at pH 9, lower in H2O2-based mediums, and similar in both thickeners. The CD-spectra indicated denaturation of the enzyme upon contact with H2O2. The PO43- levels were higher after incorporating ALP, and the ΔE/ΔE00/ΔWID were comparable among bleached groups. SMH was lower after bleaching in Exp-H, while CSMH was highest in ALP-T.
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Affiliation(s)
| | - Yendry Regina Corrales Ureña
- Faculty of Production Engineering, University of Bremen, Am Fallturm 1, 28359 Bremen, Germany
- National Laboratory of Nanotechnology LANOTEC—National Center of High Technology CeNAT, 1.3 Km North of the United States Embassy, San José 1174-1200, Costa Rica
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
| | - Klaus Rischka
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, 28359 Bremen, Germany
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Dos Anjos HA, Ortiz MIG, Aguiar FHB, Dos Santos JJ, Rodrigues UP, Rischka K, Lima DANL. Effect of incorporation of calcium polyphosphate sub-microparticles in low-concentration bleaching gels on physical properties of dental enamel. Odontology 2023:10.1007/s10266-023-00875-0. [PMID: 38148447 DOI: 10.1007/s10266-023-00875-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 11/14/2023] [Indexed: 12/28/2023]
Abstract
AIM To evaluate the bleaching efficacy and effects on enamel properties of experimental gels with carbamide peroxide (CP; 10%) or hydrogen peroxide (HP; 6%) containing calcium polyphosphate sub-microparticles (CaPPs). METHODS A total of 216 bovine tooth specimens were divided for microhardness and color analyses (n = 108) and block randomized into nine groups (n = 12): (G1) commercial CP (Whiteness Perfect, FGM; Brazil); (G2) experimental CP; (G3) CP-0.5%CaPPs; (G4) CP-1.5%CaPPs; (G5) commercial HP (Potenza Bianco, PHS; Brazil); (G6) experimental HP; (G7) HP-0.5%CaPPs; (G8) HP-1.5%CaPPs; (G9) artificial saliva. The gels' pH values were determined with a bench pH meter. Color (ΔE, ΔE00, ΔWID) and microhardness variation were evaluated before and after the therapy. Part of the specimens used for microhardness was submitted to the scanning electron microscopy (SEM) (n = 3) and energy-dispersive X-ray spectroscopy EDX (n = 3) analyses. Statistical analyses were performed in the R statistical software (α = 0.05). Linear mixed models for repeated measures in time were used to analyze microhardness and L* values. Generalized linear models were used to analyze the a*, b*, ΔE, ΔE00, and ΔWID, considering a group effect. The EDX data were analyzed using a one-way ANOVA with Tukey's test. RESULTS The gels' pH remained over 6,0. All gels effectively bleached the specimens and did not differ significantly. When compared to the control group, the hardness was significantly lower in the G1, G2, G6, and G7 groups. The G3, G4, G5, and G8 groups did not differ significantly (p > 0.05). CONCLUSION The incorporation of CaPPs in low-concentration whitening gels reduces its negative effects on microhardness without interfering with their bleaching efficacy.
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Affiliation(s)
- Hemanuelly Albuquerque Dos Anjos
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil.
| | - Mariângela Ivette Guanipa Ortiz
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
| | | | | | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials, IFAM, Bremen, Germany
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
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Escobar K, Carrera I, Naveas N, Pulido R, Manso M, Guarnieri JPDO, Lancellotti M, Cotta MA, Corrales-Ureña YR, Rischka K, Hernandez-Montelongo J. Functionalization of breast implants by cyclodextrin in-situ polymerization: a local drug delivery system for augmentation mammaplasty. Front Bioeng Biotechnol 2023; 11:1254299. [PMID: 37811378 PMCID: PMC10557261 DOI: 10.3389/fbioe.2023.1254299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/11/2023] [Indexed: 10/10/2023] Open
Abstract
Mammaplasty is a widely performed surgical procedure worldwide, utilized for breast reconstruction, in the context of breast cancer treatment, and aesthetic purposes. To enhance post-operative outcomes and reduce risks (hematoma with required evacuation, capsular contracture, implant-associated infection and others), the controlled release of medicaments can be achieved using drug delivery systems based on cyclodextrins (CDs). In this study, our objective was to functionalize commercially available silicone breast implants with smooth and textured surfaces through in-situ polymerization of two CDs: β-CD/citric acid and 2-hydroxypropyl-β-CD/citric acid. This functionalization serves as a local drug delivery system for the controlled release of therapeutic molecules that potentially can be a preventive treatment for post-operative complications in mammaplasty interventions. Initially, we evaluated the pre-treatment of sample surfaces with O2 plasma, followed by chitosan grafting. Subsequently, in-situ polymerization using both types of CDs was performed on implants. The results demonstrated that the proposed pre-treatment significantly increased the polymerization yield. The functionalized samples were characterized using microscopic and physicochemical techniques. To evaluate the efficacy of the proposed system for controlled drug delivery in augmentation mammaplasty, three different molecules were utilized: pirfenidone (PFD) for capsular contracture prevention, Rose Bengal (RB) as anticancer agent, and KR-12 peptide (KR-12) to prevent bacterial infection. The release kinetics of PFD, RB, and KR-12 were analyzed using the Korsmeyer-Peppas and monolithic solution mathematical models to identify the respective delivery mechanisms. The antibacterial effect of KR-12 was assessed against Staphylococcus epidermidis and Pseudomonas aeruginosa, revealing that the antibacterial rate of functionalized samples loaded with KR-12 was dependent on the diffusion coefficients. Finally, due to the immunomodulatory properties of KR-12 peptide on epithelial cells, this type of cells was employed to investigate the cytotoxicity of the functionalized samples. These assays confirmed the superior properties of functionalized samples compared to unprotected implants.
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Affiliation(s)
- Karen Escobar
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
| | - Ignacio Carrera
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
| | - Nelson Naveas
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
- Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta, Chile
| | - Ruth Pulido
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
- Departamento de Química, Universidad de Antofagasta, Antofagasta, Chile
| | - Miguel Manso
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
| | | | - Marcelo Lancellotti
- Faculty of Pharmaceutical Sciences, State University of Campinas, Campinas, Brazil
| | - Monica A. Cotta
- Institute of Physics Gleb Wataghin, State University of Campinas, Campinas, Brazil
| | | | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Bremen, Germany
| | - Jacobo Hernandez-Montelongo
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
- Department of Translational Bioengineering, University of Guadalajara, Guadalajara, Mexico
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Ortiz MIG, Dos Santos JJ, Rodrigues-Filho UP, Aguiar FHB, Rischka K, Lima DANL. Maintenance of enamel properties after bleaching with high-concentrated hydrogen-peroxide gel containing calcium polyphosphate sub-microparticles. Clin Oral Investig 2023; 27:5275-5285. [PMID: 37646909 DOI: 10.1007/s00784-023-05147-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/10/2023] [Indexed: 09/01/2023]
Abstract
OBJECTIVE To assessed the physical and chemical properties of human-enamel after treatment with an experimental bleaching gel containing 35%-hydrogen peroxide (HP) and calcium polyphosphate sub-microparticles (CaPP). MATERIALS AND METHODS Enamel/dentin specimens (4 × 4 × 3 mm) were obtained (n = 120) and allocated to different groups: control (saliva only); experimental (HP35%); commercial (whiteness-HP-Maxx); CaPP0.5% (HP35% + CaPP0.5wt%); CaPP1.5% (HP35% + CaPP1.5wt%). Three sessions were performed. The specimens' color was assessed using a spectrophotometer and the color (ΔE/ΔE00) and bleaching index (ΔWID) determined. The surface roughness and microhardness were assessed with a roughness tester and Knoop indenter. Raman spectroscopy was performed to obtain the ratios between the areas under the 431, 580, and 1070 cm-1 and the 960 cm-1 bands (430:960, 580:960, 1070:960). Kruskal-Wallis and Dunn compared the color, Ra, and SMH data. The Raman data was analyzed with Kruskal-Wallis and Dunn (α = 5%). RESULTS The ΔE, ΔE00, and ΔWID were similar among the bleached groups (p > 0.05). The roughness was not different between the groups (p > 0.05). After the 3rd session, CaPP0.5% had higher microhardness than the experimental (p < 0.05). The 1070:960 was higher in the experimental than in the CaPP1.5% and control (p < 0.05). CONCLUSIONS In human enamel, CaPP did not alter the bleaching effectiveness or roughness, and additionally, CaPP-containing gels increased the microhardness and preserved the mineral content when compared to the experimental without CaPP. CLINICAL RELEVANCE Experimental bleaching gels containing calcium polyphosphate sub-microparticles as a mineral source reduce the mineral content alteration and superficial microhardness reduction, known potential side effects of the in-office bleaching treatments.
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Affiliation(s)
- Mariángela Ivette Guanipa Ortiz
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas-UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
| | - Juliana Jarussi Dos Santos
- São Carlos Institute of Chemistry, Group of Chemistry of Hybrid and Inorganic Materials (GQMATHI), University of São Paulo (USP), São Carlos, SP, Brazil
| | - Ubirajara Pereira Rodrigues-Filho
- São Carlos Institute of Chemistry, Group of Chemistry of Hybrid and Inorganic Materials (GQMATHI), University of São Paulo (USP), São Carlos, SP, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas-UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
| | - Klaus Rischka
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas-UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Bremen, Germany
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas-UNICAMP, P.O. BOX 52, Piracicaba, SP, 13414-903, Brazil.
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Guanipa Ortiz MI, dos Santos JJ, Burga Sánchez J, Rodrigues-Filho UP, Aguiar FHB, Rischka K, Lima DANL. Calcium-Polyphosphate Submicroparticles (CaPP) Improvement Effect of the Experimental Bleaching Gels' Chemical and Cellular-Viability Properties. Gels 2023; 9:gels9010042. [PMID: 36661808 PMCID: PMC9857579 DOI: 10.3390/gels9010042] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
The aim of this research was to develop and characterize the chemical and cellular-viability properties of an experimental high-concentration bleaching gel (35 wt%-H2O2) containing calcium-polyphosphate particles (CaPP) at two concentrations (0.5 wt% and 1.5 wt%). The CaPP submicroparticles were synthesized by coprecipitation, keeping a Ca:P ratio of 2:1. The CaPP morphology, size, and chemical and crystal profiles were characterized through scanning and transmission electron microscopy, energy-dispersive X-ray analysis, and X-ray diffraction, respectively. The assessed bleaching gels were experimental (without CaPP); 0.5% CaPP; 1.5% CaPP; and commercial. The gels’ pH values and H2O2 concentrations (iodometric titration) were determined. The odontoblast-like cell viability after a gel’s exposure was assessed by the MTT assay. The pH and H2O2 concentration were compared through a repeated-measures analysis of variance (ANOVA) and a Tukey’s test and the cell viability through a one-way ANOVA and a Tukey’s test using a GraphPad Prism (α < 0.05). The CaPP particles were spherical (with Ca and P, 135.7 ± 80.95 nm size) and amorphous. The H2O2 concentration decreased in all groups after mixing (p < 0.001). The 0.5% CaPP resulted in more-stable pH levels and higher viability levels than the experimental one (p < 0.05). The successful incorporation of CaPP had a positive impact on the bleaching gel’s chemical and cellular-viability properties when compared to the experimental gel without these particles.
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Affiliation(s)
| | - Juliana Jarussi dos Santos
- Group of Chemistry of Hybrid and Inorganic Materials (GQMATHI), São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos 13563-120, Brazil
| | - Jonny Burga Sánchez
- Department of Physiological Science, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
| | - Ubirajara Pereira Rodrigues-Filho
- Group of Chemistry of Hybrid and Inorganic Materials (GQMATHI), São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos 13563-120, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
| | - Klaus Rischka
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
- Correspondence:
| | - Débora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas—UNICAMP, Piracicaba 13414-903, Brazil
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Corrales-Ureña YR, Schwab F, Ochoa-Martínez E, Benavides-Acevedo M, Vega-Baudrit J, Pereira R, Rischka K, Noeske PLM, Gogos A, Vanhecke D, Rothen-Rutishauser B, Petri-Fink A. Encapsulated salts in velvet worm slime drive its hardening. Sci Rep 2022; 12:19261. [PMID: 36357497 PMCID: PMC9649676 DOI: 10.1038/s41598-022-23523-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/01/2022] [Indexed: 11/12/2022] Open
Abstract
Slime expelled by velvet worms entraps prey insects within seconds in a hardened biopolymer network that matches the mechanical strength of industrial polymers. While the mechanic stimuli-responsive nature and building blocks of the polymerization are known, it is still unclear how the velvet worms' slime hardens so fast. Here, we investigated the slime for the first time, not only after, but also before expulsion. Further, we investigated the slime's micro- and nanostructures in-depth. Besides the previously reported protein nanoglobules, carbohydrates, and lipids, we discovered abundant encapsulated phosphate and carbonate salts. We also detected CO2 bubbles during the hardening of the slime. These findings, along with further observations, suggest that the encapsulated salts in expelled slime rapidly dissolve and neutralize in a baking-powder-like reaction, which seems to accelerate the drying of the slime. The proteins' conformation and aggregation are thus influenced by shear stress and the salts' neutralization reaction, increasing the slime's pH and ionic strength. These insights into the drying process of the velvet worm's slime demonstrate how naturally evolved polymerizations can unwind in seconds, and could inspire new polymers that are stimuli-responsive or fast-drying under ambient conditions.
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Affiliation(s)
- Yendry Regina Corrales-Ureña
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland ,grid.7704.40000 0001 2297 4381Faculty of Production Engineering, University of Bremen, Am Fallturm 1, 28359 Bremen, Germany
| | - Fabienne Schwab
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland
| | - Efraín Ochoa-Martínez
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland
| | - Miguel Benavides-Acevedo
- National Laboratory of Nanotechnology LANOTEC - National Center of High Technology CeNAT, 1.3 Km North of the United States Embassy, San José, Costa Rica
| | - José Vega-Baudrit
- National Laboratory of Nanotechnology LANOTEC - National Center of High Technology CeNAT, 1.3 Km North of the United States Embassy, San José, Costa Rica ,grid.10729.3d0000 0001 2166 3813School of Chemistry, National University, Heredia, Costa Rica
| | - Reinaldo Pereira
- National Laboratory of Nanotechnology LANOTEC - National Center of High Technology CeNAT, 1.3 Km North of the United States Embassy, San José, Costa Rica
| | - Klaus Rischka
- grid.461617.30000 0004 0494 8413Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
| | - Paul-Ludwig Michael Noeske
- grid.461617.30000 0004 0494 8413Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
| | - Alexander Gogos
- grid.7354.50000 0001 2331 3059EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Dimitri Vanhecke
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland
| | - Barbara Rothen-Rutishauser
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland
| | - Alke Petri-Fink
- grid.8534.a0000 0004 0478 1713Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Fribourg, Switzerland ,grid.8534.a0000 0004 0478 1713Department of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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Borge-Durán I, Grinberg I, Vega-Baudrit JR, Nguyen MT, Pereira-Pinheiro M, Thiel K, Noeske PLM, Rischka K, Corrales-Ureña YR. Application of Poly-L-Lysine for Tailoring Graphene Oxide Mediated Contact Formation between Lithium Titanium Oxide LTO Surfaces for Batteries. Polymers (Basel) 2022; 14:polym14112150. [PMID: 35683823 PMCID: PMC9182866 DOI: 10.3390/polym14112150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/16/2022] Open
Abstract
When producing stable electrodes, polymeric binders are highly functional materials that are effective in dispersing lithium-based oxides such as Li4Ti5O12 (LTO) and carbon-based materials and establishing the conductivity of the multiphase composites. Nowadays, binders such as polyvinylidene fluoride (PVDF) are used, requiring dedicated recycling strategies due to their low biodegradability and use of toxic solvents to dissolve it. Better structuring of the carbon layers and a low amount of binder could reduce the number of inactive materials in the electrode. In this study, we use computational and experimental methods to explore the use of the poly amino acid poly-L-lysine (PLL) as a novel biodegradable binder that is placed directly between nanostructured LTO and reduced graphene oxide. Density functional theory (DFT) calculations allowed us to determine that the (111) surface is the most stable LTO surface exposed to lysine. We performed Kubo-Greenwood electrical conductivity (KGEC) calculations to determine the electrical conductivity values for the hybrid LTO-lysine-rGO system. We found that the presence of the lysine-based binder at the interface increased the conductivity of the interface by four-fold relative to LTO-rGO in a lysine monolayer configuration, while two-stack lysine molecules resulted in 0.3-fold (in the plane orientation) and 0.26-fold (out of plane orientation) increases. These outcomes suggest that monolayers of lysine would specifically favor the conductivity. Experimentally, the assembly of graphene oxide on poly-L-lysine-TiO2 with sputter-deposited titania as a smooth and hydrophilic model substrate was investigated using a layer-by-layer (LBL) approach to realize the required composite morphology. Characterization techniques such as X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM), scanning electron microscopy (SEM) were used to characterize the formed layers. Our experimental results show that thin layers of rGO were assembled on the TiO2 using PLL. Furthermore, the PLL adsorbates decrease the work function difference between the rGO- and the non-rGO-coated surface and increased the specific discharge capacity of the LTO-rGO composite material. Further experimental studies are necessary to determine the influence of the PLL for aspects such as the solid electrolyte interface, dendrite formation, and crack formation.
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Affiliation(s)
- Ignacio Borge-Durán
- Chemistry Department, Bar-Ilan University, Ramat-Gan 5290002, Israel;
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), 1174-1200, Calle Costa Rica, Pavas, San José 10109, Costa Rica;
- Correspondence: (I.B.-D.); (Y.R.C.-U.)
| | - Ilya Grinberg
- Chemistry Department, Bar-Ilan University, Ramat-Gan 5290002, Israel;
| | - José Roberto Vega-Baudrit
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), 1174-1200, Calle Costa Rica, Pavas, San José 10109, Costa Rica;
- Laboratorio de Polímeros (POLIUNA), Universidad Nacional, Avenida 1, Calle 9 Heredia 86 Heredia, Heredia 40101, Costa Rica
| | - Minh Tri Nguyen
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland;
| | - Marta Pereira-Pinheiro
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany; (M.P.); (K.T.); (P.-L.M.N.); (K.R.)
| | - Karsten Thiel
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany; (M.P.); (K.T.); (P.-L.M.N.); (K.R.)
| | - Paul-Ludwig Michael Noeske
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany; (M.P.); (K.T.); (P.-L.M.N.); (K.R.)
| | - Klaus Rischka
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany; (M.P.); (K.T.); (P.-L.M.N.); (K.R.)
| | - Yendry Regina Corrales-Ureña
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), 1174-1200, Calle Costa Rica, Pavas, San José 10109, Costa Rica;
- Faculty of Production Engineering, University of Bremen, Am Fallturm 1, 28359 Bremen, Germany
- Correspondence: (I.B.-D.); (Y.R.C.-U.)
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9
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de Nadai Dias FJ, de Andrade Pinto SA, Rodrigues dos Santos A, Mainardi MDCAJ, Rischka K, de Carvalho Zavaglia CA. Resveratrol-loaded polycaprolactone scaffolds obtained by rotary jet spinning. International Journal of Polymer Analysis and Characterization 2022. [DOI: 10.1080/1023666x.2022.2068242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Francisco José de Nadai Dias
- Materials Manufacturing Engineering Department, School of Mechanical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil
- School of Dentistry, Herminio Ometto University Center, Araras, Brazil
- Post-Graduate Dentistry Programs, School of Dentistry and Medicine São Leopoldo Mandic, Campinas, Brazil
| | - Stella Aparecida de Andrade Pinto
- Materials Manufacturing Engineering Department, School of Mechanical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil
- School of Dentistry, Herminio Ometto University Center, Araras, Brazil
- Post-Graduate Dentistry Programs, School of Dentistry and Medicine São Leopoldo Mandic, Campinas, Brazil
| | | | | | - Klaus Rischka
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Bereich Klebtechnik und Oberflächen, Bremen, Germany
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10
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Lallemang M, Yu L, Cai W, Rischka K, Hartwig A, Haag R, Hugel T, Balzer BN. Multivalent non-covalent interactions lead to strongest polymer adhesion. Nanoscale 2022; 14:3768-3776. [PMID: 35171194 DOI: 10.1039/d1nr08338d] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Multivalent interactions play a leading role in biological processes such as the inhibition of inflammation or virus internalization. The multivalent interactions show enhanced strength and better selectivity compared to monovalent interactions, but they are much less understood due to their complexity. Here, we detect molecular interactions in the range of a few piconewtons to several nanonewtons and correlate them with the formation and subsequent breaking of one or several bonds and assign these bonds. This becomes possible by performing atomic force microcopy (AFM)-based single molecule force spectroscopy of a multifunctional polymer covalently attached to an AFM cantilever tip on a substrate bound polymer layer of the multifunctional polymer. Varying the pH value and the crosslinking state of the polymer layer, we find that bonds of intermediate strength (non-covalent), like coordination bonds, give the highest multivalent bond strength, even outperforming strong (covalent) bonds. At the same time, covalent bonds enhance the polymer layer density, increasing in particular the number of non-covalent bonds. In summary, we can show that the key for the design of stable and durable polymer coatings is to provide a variety of multivalent interactions and to keep the number of non-covalent interactions at a high level.
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Affiliation(s)
- Max Lallemang
- Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.
- Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Leixiao Yu
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takusstraße 3, 14195 Berlin, Germany
| | - Wanhao Cai
- Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
| | - Andreas Hartwig
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
- University of Bremen, Department 2 Biology/Chemistry, Leobener Straße 3, 28359 Bremen, Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takusstraße 3, 14195 Berlin, Germany
| | - Thorsten Hugel
- Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.
- Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Bizan N Balzer
- Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.
- Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
- Freiburg Materials Research Center (FMF), Albert Ludwig University of Freiburg, 79104 Freiburg, Germany
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11
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Gonçalves Dias LF, Stamboroski S, Noeske M, Salz D, Rischka K, Pereira R, Mainardi MDC, Cardoso MH, Wiesing M, Bronze-Uhle ES, Esteves Lins RB, Lisboa-Filho PN. New details of assembling bioactive films from dispersions of amphiphilic molecules on titania surfaces. RSC Adv 2020; 10:39854-39869. [PMID: 35558137 PMCID: PMC9088674 DOI: 10.1039/d0ra06511k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022] Open
Abstract
Tailoring the surface properties of materials for biomedical applications is important to avoid clinical complications. Forming thin layers of amphiphilic molecules with apolar regions that facilitate attractive intermolecular interactions, can be a suitable and versatile approach to achieve hydrophobic surface modification and provide functional antibacterial properties. Aiming to correlate layer structure and properties starting from film formation, octadecylphosphonic acid (ODPA) and dimethyloctadecyl (3-trimethoxysilylpropyl) ammonium chloride (DMOAP) layers were adsorbed onto smooth titania surfaces. Then the films were studied by atomic force microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS), and their interactions with aqueous environments were characterized by contact angle and zeta potential measurements. In addition, antibacterial assays were performed using E. coli and S. mutants to reveal the antibacterial properties effected by the surface modification. Immediately after sputter deposition, titania was hydrophilic; however, after air storage and adsorption of DMOAP or ODPA, an increase in the water contact angle was observed. XPS investigations after layer formation and after antibacterial tests revealed that the attachment of layers assembled from ODPA on titania substrates is considerably stronger and more stable than that observed for DMOAP films. Heat treatment strongly affects DMOAP layers. Furthermore, DMOAP layers are not stable under biological conditions. Structure–property relationship of amphiphilic molecules on smooth substrates was explored through a multi-step approach and its influence on biological activity.![]()
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Affiliation(s)
- Leonardo Francisco Gonçalves Dias
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,São Paulo State University - UNESP, School of Science, Department of Physics Brazil
| | - Stephani Stamboroski
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,Institute for Biophysics, University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
| | - Michael Noeske
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Dirk Salz
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Renata Pereira
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,Department of Restorative Dentistry, Operative Dentistry Division, Piracicaba Dental School, University of Campinas (UNICAMP) Avenida Limeira 901 Zip code 13414-903 Piracicaba, SP Brazil
| | - Maria do Carmo Mainardi
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,School of Dentistry, Herminio Ometto University Center Araras SP Brazil
| | - Marina Honorato Cardoso
- Department of Biochemistry, Bauru School of Dentistry, Sao Paulo University - USP Bauru SP Brazil
| | - Martin Wiesing
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Erika Soares Bronze-Uhle
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Sao Paulo University - USP Bauru SP Brazil
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12
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González-Masís J, Cubero-Sesin JM, Corrales-Ureña YR, González-Camacho S, Mora-Ugalde N, Vega-Baudrit JR, Rischka K, Verma V, Gonzalez-Paz RJ. Nonirritant and Cytocompatible Tinospora cordifolia Nanoparticles for Topical Antioxidant Treatments. Int J Biomater 2020; 2020:3637098. [PMID: 32904553 PMCID: PMC7456473 DOI: 10.1155/2020/3637098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/21/2020] [Accepted: 07/09/2020] [Indexed: 11/18/2022] Open
Abstract
Tinospora cordifolia extract contains antioxidants such as polyphenols, and thus, it has been used as a natural phytochemical antioxidant therapeutic agent. Many of these compounds are insoluble or only partially soluble in water. In this study, we produced a novel aqueous nanoparticle formulation, with an average particle size of 182.9 ± 3.8 nm, to improve the dispersion of the bioactive compounds in water and to increment its bioavailability. The nanoparticles are composed of polyphenols, alkaloids, and glycosides. We studied the effect of this nanoparticle formulation on mouse 3T3 fibroblast cell viability and New Zealand rabbit dermal irritability tests. Concentrations of 2.5, 25, and 250 µg/mL resulted in similar cell viability to cells in culture media. An intermediate concentration of 12.45 mg/ml was used for the acute dermal irritability test. There were no severe alterations that compromised animal health. These results represent a precedent for application of such nanoparticles derived from plant stems, such as Tinospora cordifolia, in biomedicine and in antiaging cosmetic treatments.
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Affiliation(s)
- Jeimmy González-Masís
- Centro de Investigación y Extensión en Materiales, Escuela de Ciencia e Ingeniería de Los Materiales, Instituto Tecnológico de Costa Rica, Cartago 159-7050, Costa Rica
| | - Jorge M. Cubero-Sesin
- Centro de Investigación y Extensión en Materiales, Escuela de Ciencia e Ingeniería de Los Materiales, Instituto Tecnológico de Costa Rica, Cartago 159-7050, Costa Rica
| | - Yendry Regina Corrales-Ureña
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), Pavas 1174-1200, San José, Costa Rica
| | - Sara González-Camacho
- Biological Assay Laboratory (LEBi), Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Nohelia Mora-Ugalde
- National Center for Biotechnological Innovations (CENIBiot), National Center of High Technology (-CeNAT-CONARE), Pavas 1174-1200, San José, Costa Rica
| | - José Roberto Vega-Baudrit
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), Pavas 1174-1200, San José, Costa Rica
- Laboratorio de Polímeros (POLIUNA), Universidad Nacional, Heredia 86-3000, Costa Rica
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Adhesive Bonding Technology and Surfaces, Wiener Straße 12, 28359, Bremen, Germany
| | - Virendra Verma
- Ayurvedic Physician Private Clinic & Panchakarma Centre, Varanasi, India
| | - Rodolfo J. Gonzalez-Paz
- National Laboratory of Nanotechnology LANOTEC, National Center of High Technology (CeNAT-CONARE), Pavas 1174-1200, San José, Costa Rica
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13
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Figueiredo Macedo de Lima J, Aguiar Jordão Mainardi MDC, Puppin-Rontani RM, Pereira Rodrigues-Filho U, Suzy Liporoni PC, Calegaro ML, Rischka K, Baggio Aguiar FH. Bioinspired catechol chemistry for dentin remineralization: A new approach for the treatment of dentin hypersensitivity. Dent Mater 2020; 36:501-511. [DOI: 10.1016/j.dental.2020.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 12/20/2019] [Accepted: 01/14/2020] [Indexed: 11/25/2022]
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14
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Corrales-Ureña YR, Souza-Schiaber Z, Lisboa-Filho PN, Marquenet F, Michael Noeske PL, Gätjen L, Rischka K. Functionalization of hydrophobic surfaces with antimicrobial peptides immobilized on a bio-interfactant layer. RSC Adv 2020; 10:376-386. [PMID: 35492519 PMCID: PMC9047062 DOI: 10.1039/c9ra07380a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 12/16/2019] [Indexed: 01/31/2023] Open
Abstract
The design of functionalized polymer surfaces using bioactive compounds has grown rapidly over the past decade within many industries including biomedical, textile, microelectronics, bioprocessing and food packaging sectors. Polymer surfaces such as polystyrene (PS) must be treated using surface activation processes prior to the attachment of bioactive compounds. In this study, a new peptide immobilization strategy onto hydrocarbonaceus polymer surfaces is presented. A bio-interfactant layer made up of a tailored combination of laccase from trametes versicolor enzyme and maltodextrin is applied to immobilize peptides. Using this strategy, immobilization of the bio-inspired peptide KLWWMIRRWG-bromophenylalanine-3,4-dihydroxyphenylalanine-G and KLWWMIRRWG-bromophenylalanine-G on polystyrene (PS) was achieved. The interacting laccase layers allows to immobilize antimicrobial peptides avoiding the chemical modification of the peptide with a spacer and providing some freedom that facilitates different orientations. These are not strongly dominated by the substrate as it is the case on hydrophobic surfaces; maintaining the antimicrobial activity. Films exhibited depletion efficiency with respect to the growth of Escherichia coli bacteria and did not show cytotoxicity for fibroblast L929. This environmentally friendly antimicrobial surface treatment is both simple and fast, and employs aqueous solutions. Furthermore, the method can be extended to three-dimensional scaffolds as well as rough and patterned substrates. A bio-interfactant layer is applied on hydrophobic surfaces to immobilize antimicrobial peptides.![]()
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Affiliation(s)
| | | | | | - Florian Marquenet
- Department of Chemistry
- University of Fribourg
- CH-1700 Fribourg
- Switzerland
| | | | - Linda Gätjen
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- 28359 Bremen
- Germany
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- 28359 Bremen
- Germany
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15
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Allegretti C, Fontanay S, Rischka K, Strini A, Troquet J, Turri S, Griffini G, D’Arrigo P. Two-Step Fractionation of a Model Technical Lignin by Combined Organic Solvent Extraction and Membrane Ultrafiltration. ACS Omega 2019; 4:4615-4626. [PMID: 31459649 PMCID: PMC6647992 DOI: 10.1021/acsomega.8b02851] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/18/2019] [Indexed: 05/27/2023]
Abstract
A fractionation method for technical lignin was developed, combining organic solvent extraction and membrane ultrafiltration of the solvent soluble component. This method was validated on a commercial wheat straw/Sarkanda grass lignin (Protobind 1000) using 2-butanone (MEK) as the solvent for both the extraction and the ultrafiltration operations. The parent lignin and the different obtained fractions were fully characterized in terms of chemical composition and physicochemical properties by gel permeation chromatography, gas chromatography/mass spectrometry (GC/MS), pyrolysis-GC/MS, total phenol contents, 31P nuclear magnetic resonance (31P NMR), thermogravimetric analysis, differential scanning calorimetry analysis, and Fourier-transform infrared spectroscopy. The results show that the proposed process allows a straightforward recovery of the different lignin fractions as well as a selective control over their molecular mass distribution and related dependent properties. Moreover, the operating flexibility of the Soxhlet/ultrafiltration process allows the treatment of lignins from different feedstocks using the same installation just by modulating the choice of the solvent and the membrane porosity with the best characteristics. This is one of the most important features of the proposed strategy, which represents a new fractionation approach with the potential to improve lignin valorization for materials science and preparative organic chemistry applications.
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Affiliation(s)
- Chiara Allegretti
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, p.zza L. da Vinci 32, Milano 20133, Italy
| | - Simon Fontanay
- Biobasic
Environnement, Biopôle Clermont-Limagne, Saint-Beauzire 63360, France
| | - Klaus Rischka
- Fraunhofer
Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Str. 12, 28359 Bremen, Germany
| | - Alberto Strini
- Construction
Technologies Institute-National Research Council of Italy (ITC-CNR), via Lombardia 49, San Giuliano Milanese 20098, Italy
| | - Julien Troquet
- Biobasic
Environnement, Biopôle Clermont-Limagne, Saint-Beauzire 63360, France
| | - Stefano Turri
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, p.zza L. da Vinci 32, Milano 20133, Italy
| | - Gianmarco Griffini
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, p.zza L. da Vinci 32, Milano 20133, Italy
| | - Paola D’Arrigo
- Department
of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, p.zza L. da Vinci 32, Milano 20133, Italy
- Istituto
di Chimica del Riconoscimento Molecolare, CNR, via Mario Bianco 9, Milano 20131, Italy
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16
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Macul Perez F, Corrales Ureña YR, Rischka K, Leite Cavalcanti W, Noeske PLM, Safari AA, Wei G, Colombi Ciacchi L. Bio-interfactants as double-sided tapes for graphene oxide. Nanoscale 2019; 11:4236-4247. [PMID: 30543260 DOI: 10.1039/c8nr08607a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present a versatile and highly substrate-independent approach for preparing multisandwich layers based on thermally reduced Graphene Oxide (rGO) which gets strongly attached by bio-interfactants using a layer-by-layer (LBL) aqueous dipping and rinsing process. The process allows for the deposition of homogeneous ultra-thin films (∼5.5 nm) in distinct surface topographies, thicknesses and compositions by varying the bio-interfactant layer(s). The layers formed on quartz or other semi conductive material are electrically conductive, flexible, and transparent. The here-developed approach could be applied for the fabrication of wearables, sensors, and antistatic transparent films.
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Affiliation(s)
- Felipe Macul Perez
- Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany.
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17
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Ferretti M, Rischka K, Abuna G, Mainardi M, Aguiar F. Influence of dentin biomodification on bond strength and MMP activity. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Hernandez-Montelongo J, Corrales Ureña Y, Machado D, Lancelloti M, Pinheiro M, Rischka K, Lisboa-Filho P, Cotta M. Electrostatic immobilization of antimicrobial peptides on polyethylenimine and their antibacterial effect against Staphylococcus epidermidis. Colloids Surf B Biointerfaces 2018; 164:370-378. [DOI: 10.1016/j.colsurfb.2018.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/29/2018] [Accepted: 02/02/2018] [Indexed: 12/22/2022]
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19
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Speidel MW, Kleemeier M, Hartwig A, Rischka K, Ellermann A, Daniels R, Betz O. Structural and tribometric characterization of biomimetically inspired synthetic "insect adhesives". Beilstein J Nanotechnol 2017; 8:45-63. [PMID: 28144564 PMCID: PMC5238622 DOI: 10.3762/bjnano.8.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 12/14/2016] [Indexed: 05/12/2023]
Abstract
Background: Based on previous chemical analyses of insect tarsal adhesives, we prepared 12 heterogeneous synthetic emulsions mimicking the polar/non-polar principle, analysed their microscopical structure and tested their adhesive, frictional, and rheological properties. Results: The prepared emulsions varied in their consistency from solid rubber-like, over soft elastic, to fluid (watery or oily). With droplet sizes >100 nm, all the emulsions belonged to the common type of macroemulsions. The emulsions of the first generation generally showed broader droplet-size ranges compared with the second generation, especially when less defined components such as petrolatum or waxes were present in the lipophilic fraction of the first generation of emulsions. Some of the prepared emulsions showed a yield point and were Bingham fluids. Tribometric adhesion was tested via probe tack tests. Compared with the "second generation" (containing less viscous components), the "first generation" emulsions were much more adhesive (31-93 mN), a finding attributable to their highly viscous components, i.e., wax, petrolatum, gelatin and poly(vinyl alcohol). In the second generation emulsions, we attained much lower adhesivenesses, ranging between 1-18 mN. The adhesive performance was drastically reduced in the emulsions that contained albumin as the protein component or that lacked protein. Tribometric shear tests were performed at moderate normal loads. Our measured friction forces (4-93 mN in the first and 0.1-5.8 mN in the second generation emulsions) were comparatively low. Differences in shear performance were related to the chemical composition and emulsion structure. Conclusion: By varying their chemical composition, synthetic heterogeneous adhesive emulsions can be adjusted to have diverse consistencies and are able to mimic certain rheological and tribological properties of natural tarsal insect adhesives.
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Affiliation(s)
- Matthias W Speidel
- Institut für Evolution und Ökologie, Universität Tübingen, Auf der Morgenstelle 28, D-72076 Tübingen, Germany
| | - Malte Kleemeier
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung, Wiener Str. 12, D-28359 Bremen, Germany
| | - Andreas Hartwig
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung, Wiener Str. 12, D-28359 Bremen, Germany
- Universität Bremen, Fachbereich 2 Biologie/Chemie, Leobener Str., 28359 Bremen, Germany
| | - Klaus Rischka
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung, Wiener Str. 12, D-28359 Bremen, Germany
| | - Angelika Ellermann
- Pharmazeutisches Institut, Universität Tübingen, Pharmazeutische Technologie und Biopharmazie, Auf der Morgenstelle 8, D-72076 Tübingen, Germany
| | - Rolf Daniels
- Pharmazeutisches Institut, Universität Tübingen, Pharmazeutische Technologie und Biopharmazie, Auf der Morgenstelle 8, D-72076 Tübingen, Germany
| | - Oliver Betz
- Institut für Evolution und Ökologie, Universität Tübingen, Auf der Morgenstelle 28, D-72076 Tübingen, Germany
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20
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Rossi de Aguiar KMF, Ferreira-Neto EP, Blunk S, Schneider JF, Picon CA, Lepienski CM, Rischka K, Rodrigues-Filho UP. Hybrid urethanesil coatings for inorganic surfaces produced by isocyanate-free and sol–gel routes: synthesis and characterization. RSC Adv 2016. [DOI: 10.1039/c5ra24331a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel hybrid poly(dimethylsiloxane) urethanesils produced by CO2 fixation present multifunctional properties for metallic and inorganic surfaces.
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Affiliation(s)
| | | | - S. Blunk
- Department of Physics
- Federal University of Paraná
- Curitiba
- Brazil
| | - J. F. Schneider
- Institute of Physics of São Carlos
- University of São Paulo
- São Carlos
- Brazil
| | - C. A. Picon
- Engineering Faculty
- State University Julio de Mesquita Filho
- Ilha Solteira
- Brazil
| | - C. M. Lepienski
- Department of Physics
- Federal University of Paraná
- Curitiba
- Brazil
| | - K. Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- Bremen
- Germany
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21
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Rossi de Aguiar KMF, Specht U, Maass JF, Salz D, Picon CA, Noeske PLM, Rischka K, Rodrigues-Filho UP. Surface modification by physical treatments on biomedical grade metals to improve adhesion for bonding hybrid non-isocyanate urethanes. RSC Adv 2016. [DOI: 10.1039/c6ra05397a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work aims to improve the adhesion of a hybrid non-isocyanate polydimethylsiloxane urethane (PDMSUr) coating by producing active layers on titanium alloy (Ti6Al4V) and stainless steel (SS316L) applying pulsed Nd:YAG laser and oxygen plasma.
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Affiliation(s)
| | - U. Specht
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- Bremen
- Germany
| | - J. F. Maass
- Pontifical Catholic University of Rio Grande do Sul
- Porto Alegre
- Brazil
| | - D. Salz
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- Bremen
- Germany
| | - C. A. Picon
- Engineering Faculty
- State University Julio de Mesquita Filho
- Ilha Solteira
- Brazil
| | - P.-L. M. Noeske
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- Bremen
- Germany
| | - K. Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM
- Bremen
- Germany
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22
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Krysiak S, Wei Q, Rischka K, Hartwig A, Haag R, Hugel T. Adsorption mechanism and valency of catechol-functionalized hyperbranched polyglycerols. Beilstein J Org Chem 2015; 11:828-36. [PMID: 26150898 PMCID: PMC4463490 DOI: 10.3762/bjoc.11.92] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 04/29/2015] [Indexed: 12/17/2022] Open
Abstract
Nature often serves as a model system for developing new adhesives. In aqueous environments, mussel-inspired adhesives are promising candidates. Understanding the mechanism of the extraordinarily strong adhesive bonds of the catechol group will likely aid in the development of adhesives. With this aim, we study the adhesion of catechol-based adhesives to metal oxides on the molecular level using atomic force microscopy (AFM). The comparison of single catechols (dopamine) with multiple catechols on hyperbranched polyglycerols (hPG) at various pH and dwell times allowed us to further increase our understanding. In particular, we were able to elucidate how to achieve strong bonds of different valency. It was concluded that hyperbranched polyglycerols with added catechol end groups are promising candidates for durable surface coatings.
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Affiliation(s)
- Stefanie Krysiak
- Physik Department and IMETUM, Technische Universität München, 85748 Garching, Germany
| | - Qiang Wei
- Department of Chemistry and Biochemistry, Freie Universität Berlin, 14195 Berlin, Germany
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (FhG IFAM), 28359 Bremen, Germany
| | - Andreas Hartwig
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials (FhG IFAM), 28359 Bremen, Germany
| | - Rainer Haag
- Department of Chemistry and Biochemistry, Freie Universität Berlin, 14195 Berlin, Germany
| | - Thorsten Hugel
- Institute of Physical Chemistry, University of Freiburg, Albertstraße 23a, 79104 Freiburg, Germany
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23
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Ureña YRC, Bettini SHP, Muñoz PR, Wittig L, Rischka K, Lisboa-Filho PN. In situ sonochemical synthesis of ZnO particles embedded in a thermoplastic matrix for biomedical applications. Materials Science and Engineering: C 2015; 49:58-65. [DOI: 10.1016/j.msec.2014.12.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 09/28/2014] [Accepted: 12/05/2014] [Indexed: 11/29/2022]
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24
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Aguiar KR, Santos VG, Eberlin MN, Rischka K, Noeske M, Tremiliosi-Filho G, Rodrigues-Filho UP. Efficient green synthesis of bis(cyclic carbonate)poly(dimethylsiloxane) derivative using CO2 addition: a novel precursor for synthesis of urethanes. RSC Adv 2014. [DOI: 10.1039/c4ra03846k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(dimethyl siloxane), PDMS, with terminal cyclic carbonate groups was prepared by cycloaddition of carbon dioxide to epoxy rings using tetra alkyl-ammonium bromide as a catalyst under efficient and mild conditions.
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Affiliation(s)
- K. R. Aguiar
- University of Sao Paulo
- Institute of Chemistry of Sao Carlos
- Sao Carlos, Brazil
| | - V. G. Santos
- State University of Campinas
- ThoMSon Mass Spectrometry Laboratory
- Campinas, Brazil
| | - M. N. Eberlin
- State University of Campinas
- ThoMSon Mass Spectrometry Laboratory
- Campinas, Brazil
| | - K. Rischka
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
- Bremen, Germany
| | - M. Noeske
- Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
- Bremen, Germany
| | - G. Tremiliosi-Filho
- University of Sao Paulo
- Institute of Chemistry of Sao Carlos
- Sao Carlos, Brazil
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25
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Richter K, Diaconu G, Rischka K, Amkreutz M, Müller FA, Hartwig A. Adsorption studies of mussel-inspired peptides. Bioinspired, Biomimetic and Nanobiomaterials 2013. [DOI: 10.1680/bbn.12.00022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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26
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Abstract
Structural properties of the nanosized silica Ludox TMA with novel functionalizations have been investigated. Silica is stabilized in aqueous solution at a pH value higher than the pK(a) of silicic acid. A surface modification consisting of poly(p-benzamide)s functionalized with derivatized nucleobases on the C-terminus and cationic pyridinium functions on the N-terminus of the polymer chain was carried out. Due to the negatively charged surface, strong physisorption of the cationic pyridinium functions occurs. It is possible to stabilize diluted solutions of silica without agglomeration in solvents with various polarities by using pyridinium cations. Defined structures could be created according to the hydrogen donor/acceptor potential of the introduced nucleobase. Surprisingly the interactions between the same nucleobases are already sufficient for strong particle-particle interactions. Dramatic effects on the structural behavior are characterized by PCS, (S)TEM and EFTEM.
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Affiliation(s)
- Jesse Roose
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Wiener Str. 12, 28359 Bremen, Germany
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27
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Belli R, Richter K, Wagner A, Rischka K, Petschelt A, Lohbauer U. Mefp-1-based peptides as hydrophilic adhesives: Bonding to zirconia. Dent Mater 2010. [DOI: 10.1016/j.dental.2009.11.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Grunwald I, Rischka K, Kast SM, Scheibel T, Bargel H. Mimicking biopolymers on a molecular scale: nano(bio)technology based on engineered proteins. Philos Trans A Math Phys Eng Sci 2009; 367:1727-1747. [PMID: 19376768 DOI: 10.1098/rsta.2009.0012] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Proteins are ubiquitous biopolymers that adopt distinct three-dimensional structures and fulfil a multitude of elementary functions in organisms. Recent systematic studies in molecular biology and biotechnology have improved the understanding of basic functional and architectural principles of proteins, making them attractive candidates as concept generators for technological development in material science, particularly in biomedicine and nano(bio)technology. This paper highlights the potential of molecular biomimetics in mimicking high-performance proteins and provides concepts for applications in four case studies, i.e. spider silk, antifreeze proteins, blue mussel adhesive proteins and viral ion channels.
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Affiliation(s)
- Ingo Grunwald
- Department of Adhesive Bonding Technology and Surfaces, Fraunhofer Institute for Manufacturing Technology and Applied Materials Research (IFAM)28359 Bremen, Germany
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29
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Lohbauer U, Zipperle M, Rischka K, Petschelt A, Müller FA. Hydroxylation of dental zirconia surfaces: characterization and bonding potential. J Biomed Mater Res B Appl Biomater 2009; 87:461-7. [PMID: 18506815 DOI: 10.1002/jbm.b.31126] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Bioinert zirconia surfaces exhibit a low chemical bonding potential to resin-based luting agents. The aim was to hydroxylate dental zirconia surfaces and to examine tensile bond strength using commercial luting agents. The measured bond strength was compared with established mechanical conditioning techniques. Five acidic and one alkaline hydroxylation pretreatments were applied and compared with air abrasion and tribochemical silica coating. For the chemical characterization of hydroxyl groups and hydroxyl value, zirconia powders were used, chemically modified, and analyzed using Fourier-transformed infrared spectroscopy and a titrimetric method according to the ISO 4629 standard. All acidic pretreatment procedures exhibited increased hydroxyl values. The highest values were recorded after treatment with phosphoric acid or Piranha solution. Tensile bond strength was examined in a universal testing machine using the commercial dual-cure luting agents Multilink (Ivoclar, Liechtenstein) and Panavia F2.0 (Kuraray, Japan). Surface hydroxylation with Piranha solution in combination with the luting agent Multilink led to a bond strength of 12.47 +/- 3.25 MPa. Tribochemical silica-coated/silanized zirconia surfaces with Multilink produced the highest bond strength of 19.33 +/- 3.65 MPa. Using the luting agent Panavia F2.0, statistically homogenous values for the untreated (11.60 +/- 1.68 MPa) and for the hydroxylated surface (12.46 +/- 3,81 MPa) were measured. Bioinert zirconia surfaces were successfully hydroxylated in terms of tensile bond strength. Resin bonding with Multilink can be strongly increased by acidic treatment with Piranha solution. Bonding with Panavia F2.0 is not affected by hydroxylation, which is likely due to the incorporation of specific functional monomers.
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Affiliation(s)
- Ulrich Lohbauer
- Dental Clinic 1 - Operative Dentistry and Periodontology, University of Erlangen-Nuremberg, Erlangen, Germany.
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30
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Justus E, Rischka K, Wishart J, Werner K, Gabel D. Trialkylammoniododecaborates: Anions for Ionic Liquids with Potassium, Lithium and Protons as Cations. Chemistry 2008; 14:1918-23. [DOI: 10.1002/chem.200701427] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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