scholarly journals Evidence for Intramolecular Antiparallel Beta-Sheet Structure in Alpha-Synuclein Fibrils from a Combination of Two-Dimensional Infrared Spectroscopy and Atomic Force Microscopy

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Steven J. Roeters ◽  
Aditya Iyer ◽  
Galja Pletikapić ◽  
Vladimir Kogan ◽  
Vinod Subramaniam ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Infrared Spectroscopy ◽  
Alpha Synuclein ◽  
Two Dimensional ◽  
Beta Sheet ◽  
Force Microscopy ◽  
Atomic Force ◽  
Beta Sheet Structure ◽  
Sheet Structure ◽  
Two Dimensional Infrared Spectroscopy

scholarly journals The Infuence of Salicin on Rheological and Film-Forming Properties of Collagen

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1661
Author(s):  
Katarzyna Adamiak ◽  
Katarzyna Lewandowska ◽  
Alina Sionkowska
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Infrared Spectroscopy ◽  
Rheological Properties ◽  
Silver Carp ◽  
Shear Tests ◽  
Force Microscopy ◽  
Atomic Force ◽  
Film Forming ◽  
Potential Applications

Collagen films are widely used as adhesives in medicine and cosmetology. However, its properties require modification. In this work, the influence of salicin on the properties of collagen solution and films was studied. Collagen was extracted from silver carp skin. The rheological properties of collagen solutions with and without salicin were characterized by steady shear tests. Thin collagen films were prepared by solvent evaporation. The structure of films was researched using infrared spectroscopy. The surface properties of films were investigated using Atomic Force Microscopy (AFM). Mechanical properties were measured as well. It was found that the addition of salicin modified the roughness of collagen films and their mechanical and rheological properties. The above-mentioned parameters are very important in potential applications of collagen films containing salicin.

Corrigendum to “Atomic force microscopy for two-dimensional materials: A tutorial review” [Opt. Commun. 406 (2018) 3–17]

2018 ◽  
Vol 421 ◽  
pp. 134
Author(s):  
Hang Zhang ◽  
Junxiang Huang ◽  
Yongwei Wang ◽  
Rui Liu ◽  
Xiulan Huai ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force ◽  
Two Dimensional Materials

scholarly journals Correction: Mid-infrared spectroscopy and microscopy of subcellular structures in eukaryotic cells with atomic force microscopy – infrared spectroscopy

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30461-30461
Author(s):  
Luca Quaroni ◽  
Katarzyna Pogoda ◽  
Joanna Wiltowska-Zuber ◽  
Wojciech M. Kwiatek
Keyword(s):  
Atomic Force Microscopy ◽  
Infrared Spectroscopy ◽  
Eukaryotic Cells ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Force Microscopy ◽  
Atomic Force

Correction for ‘Mid-infrared spectroscopy and microscopy of subcellular structures in eukaryotic cells with atomic force microscopy – infrared spectroscopy’ by Luca Quaroni et al., RSC Adv., 2018, 8, 2786–2794.

scholarly journals The Mechanical Properties, Secondary Structure, and Osteogenic Activity of Photopolymerized Fibroin

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 646 ◽  
Author(s):  
Ivan Bessonov ◽  
Anastasia Moysenovich ◽  
Anastasia Arkhipova ◽  
Mariam Ezernitskaya ◽  
Yuri Efremov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Elasticity Modulus ◽  
Polymer Network ◽  
Beta Sheet ◽  
Ethanol Treatment ◽  
Force Microscopy ◽  
Osteogenic Activity ◽  
Atomic Force ◽  
Crystalline Domains

Previously, we have described the preparation of a novel fibroin methacrylamide (FbMA), a polymer network with improved functionality, capable of photocrosslinking into Fb hydrogels with elevated stiffness. However, it was unclear how this new functionality affects the structure of the material and its beta-sheet-associated crystallinity. Here, we show that the proposed method of Fb methacrylation does not disturb the protein’s ability to self-aggregate into the stable beta-sheet-based crystalline domains. Fourier transform infrared spectroscopy (FTIR) shows that, although the precursor ethanol-untreated Fb films exhibited a slightly higher degree of beta-sheet content than the FbMA films (46.9% for Fb-F-aq and 41.5% for FbMA-F-aq), both materials could equally achieve the highest possible beta-sheet content after ethanol treatment (49.8% for Fb-F-et and 49.0% for FbMA-F-et). The elasticity modulus for the FbMA-F-et films was twofold higher than that of the Fb-F-et as measured by the uniaxial tension (130 ± 1 MPa vs. 64 ± 6 MPa), and 1.4 times higher (51 ± 11 MPa vs. 36 ± 4 MPa) as measured by atomic force microscopy. The culturing of human MG63 osteoblast-like cells on Fb-F-et, FbMA-F-et-w/oUV, and FbMA-F-et substrates revealed that the photocrosslinking-induced increment of stiffness increases the area covered by the cells, rearrangement of actin cytoskeleton, and vinculin distribution in focal contacts, altogether enhancing the osteoinductive activity of the substrate.

Imaging Two-dimensional Crystals of Catalase by Atomic Force Microscopy

1996 ◽  
Vol 35 (Part 1, No. 12A) ◽  
pp. 6233-6238 ◽  
Author(s):  
Satomi Ohnishi ◽  
Masahiko Hara ◽  
Taiji Furuno ◽  
Hiroyuki Sasabe
Keyword(s):  
Atomic Force Microscopy ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force
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