scholarly journals Elastic behavior of model membranes with antimicrobial peptides depends on lipid specificity and d-enantiomers

Soft Matter ◽  
2019 ◽  
Vol 15 (8) ◽  
pp. 1860-1868 ◽  
Author(s):  
Akari Kumagai ◽  
Fernando G. Dupuy ◽  
Zoran Arsov ◽  
Yasmene Elhady ◽  
Diamond Moody ◽  
...  
Keyword(s):  
Order Parameter ◽  
Model Membranes ◽  
Elastic Behavior ◽  
X Ray ◽  
Bending Modulus ◽  
X Ray Scattering ◽  
Chain Order ◽  
Lipid Chain ◽  
Lipid Specificity ◽  
Ray Scattering

(A) Low-angle X-ray scattering (LAXS) of oriented, fully hydrated model membranes yields bending modulus (KC) and (B) wide-angle X-ray scattering (WAXS) yields lipid chain order parameter (SX-ray).

Quantification of Starch Order in Physically Modified Rice Flours Using Small-Angle X-ray Scattering (SAXS) and Fourier Transform Infrared (FT-IR) Spectroscopy

2021 ◽  
pp. 000370282110282
Author(s):  
Daitaro Ishikawa ◽  
Jiamin Yang ◽  
Tomoyuki Fujii
Keyword(s):  
Infrared Spectroscopy ◽  
Small Angle ◽  
Water Sorption ◽  
Order Parameter ◽  
Rice Flour ◽  
Ordered Structure ◽  
X Ray ◽  
Glucose Unit ◽  
X Ray Scattering ◽  
Ray Scattering

The purpose of this study was to understand the ordered structure of starch in rice flour based on a physical modification with non-heating, milling, and water sorption through the structural evaluation of rice flour using small-angle X-ray scattering (SAXS) and infrared spectroscopy within the 4000–100 cm−1 region. The SAXS pattern of the samples with low moisture contents subjected to milling yield a band within the 0.4–0.9 nm−1 of the q range owing to a lamellar repeat of starch with an ordered structure in rice flour. We proposed an order parameter using the intensity of the SAXS band to quantify the order structure of starch in rice flour, and the true density was negatively correlated with the order parameter. Infrared band at 990 cm−1 in COH bending mode applied to the hydroxyl group of C6 shifted to a low wavenumber corresponding to the order parameter. A linear correlation was found between the order parameter and the 990 cm−1 and band at 861 cm−1 owing to COC symmetrical stretching of glycoside bond and CH2 deformation of the glucose unit of starch, 572, 472, and 436 cm−1, owing to the pyranose ring in the glucose unit of starch. The identified infrared bands are effective for quantifying the ordered structure of starch at the lamellar level. When subjected to water sorption, the band position at 990 cm−1 shifted to a higher wavenumber above a water activity of 0.7. This result revealed that the water-induced transition of glass to rubber of starch in rice flour can be clearly evaluated through infrared spectroscopy using the band at 990 cm−1. In addition, the band at 861 cm−1 also shifted to a higher wavenumber, whereas those at 572 and 436 cm−1 did not show a significant shift. These results indicate that water sorption slightly affects the internal structure and may mainly affect the surface of starch.

The Interaction of the Peptide NK-2 with Model Membranes: Insights by Neutron Diffraction and X-ray Scattering

2004 ◽  
Vol 2004 (Fall) ◽  
Author(s):  
Regine Willumeit ◽  
Mont Kumpugdee ◽  
Sebastian Linser ◽  
Thomas Hauss ◽  
Sergio S. Funari ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Model Membranes ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals The Effect of Ceramide on Model Membranes and Apoptotic Cells Determined by X-Ray Scattering, Solid State NMR, and Flow Cytometry

2010 ◽  
Vol 98 (3) ◽  
pp. 465a-466a
Author(s):  
Matthew J. Justice ◽  
Adriana L. Rogozea ◽  
Daniela N. Petrusca ◽  
Irina Petrache ◽  
Stephen R. Wassall ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Solid State ◽  
Solid State Nmr ◽  
Model Membranes ◽  
Apoptotic Cells ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Applications of neutron and X-ray scattering to the study of biologically relevant model membranes

2010 ◽  
Vol 163 (6) ◽  
pp. 460-479 ◽  
Author(s):  
G. Pabst ◽  
N. Kučerka ◽  
M.-P. Nieh ◽  
M.C. Rheinstädter ◽  
J. Katsaras
Keyword(s):  
Model Membranes ◽  
Relevant Model ◽  
X Ray ◽  
Biologically Relevant ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Resonant Inelastic X-Ray Scattering as a Probe of the Phase and Excitations of the Order Parameter of Superconductors

2013 ◽  
Vol 110 (11) ◽  
Author(s):  
Pasquale Marra ◽  
Steffen Sykora ◽  
Krzysztof Wohlfeld ◽  
Jeroen van den Brink
Keyword(s):  
Order Parameter ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The Measurement of the Nematic Order Parameter by X-ray Scattering Reconsidered

1995 ◽  
Vol 5 (1) ◽  
pp. 113-131 ◽  
Author(s):  
P. Davidson ◽  
D. Petermann ◽  
A. M. Levelut
Keyword(s):  
Order Parameter ◽  
X Ray ◽  
Nematic Order ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Integrated x-ray-scattering intensity measurement of the order parameter at the nematic-to-smectic-Aphase transition

1985 ◽  
Vol 54 (9) ◽  
pp. 920-923 ◽  
Author(s):  
Kelby K. Chan ◽  
Moshe Deutsch ◽  
B. M. Ocko ◽  
P. S. Pershan ◽  
L. B. Sorensen
Keyword(s):  
Order Parameter ◽  
Intensity Measurement ◽  
Scattering Intensity ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Spontaneous vesicle formation in a deep eutectic solvent

Soft Matter ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 1645-1648 ◽  
Author(s):  
Saffron J. Bryant ◽  
Rob Atkin ◽  
Gregory G. Warr
Keyword(s):  
Melting Temperature ◽  
Small Angle ◽  
Deep Eutectic Solvent ◽  
Vesicle Formation ◽  
X Ray ◽  
X Ray Scattering ◽  
Lipid Chain ◽  
Ray Scattering

Solvent penetration experiments and small-angle X-ray scattering reveal that phospholipids dissolved in a deep eutectic solvent (DES) spontaneously self-assemble into vesicles above the lipid chain melting temperature.

Sign in / Sign up

Export Citation Format

Share Document