Milk Gelation Studied with Small Angle Neutron Scattering Techniques and Monte Carlo Simulations

2010 ◽  
Vol 114 (7) ◽  
pp. 2412-2426 ◽  
Author(s):  
Léon F. van Heijkamp ◽  
Ignatz M. de Schepper ◽  
Markus Strobl ◽  
R. Hans Tromp ◽  
Jouke R. Heringa ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Milk Gelation

scholarly journals Salt-Dependent DNA Superhelix Diameter Studied by Small Angle Neutron Scattering Measurements and Monte Carlo Simulations

1998 ◽  
Vol 75 (6) ◽  
pp. 3057-3063 ◽  
Author(s):  
Markus Hammermann ◽  
Nathalie Brun ◽  
Konstantin V. Klenin ◽  
Roland May ◽  
Katalin Tóth ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Scattering Measurements

Spin echo modulated small-angle neutron scattering using superconducting magnetic Wollaston prisms

2016 ◽  
Vol 49 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Fankang Li ◽  
Steven R. Parnell ◽  
Hongyu Bai ◽  
Wencao Yang ◽  
William A. Hamilton ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Spin Echo ◽  
Test Sample ◽  
Neutron Spin ◽  
Neutron Polarization ◽  
Magnetic Components

The spin echo modulated small-angle neutron scattering technique has been implemented using two superconducting magnetic Wollaston prisms at a reactor neutron source. The density autocorrelation function measured for a test sample of colloidal silica in a suspension agrees with that obtained previously by other neutron scattering methods on an identically prepared sample. The reported apparatus has a number of advantages over competing technologies: it should allow larger length scales (up to several micrometres) to be probed; it has very small parasitic neutron scattering and attenuation; the magnetic fields within the device are highly uniform; and the neutron spin transport across the device boundaries is very efficient. To understand quantitatively the results of the reported experiment and to guide future instrument development, Monte Carlo simulations are presented, in which the evolution of the neutron polarization through the apparatus is based on magnetic field integrals obtained from finite-element simulations of the various magnetic components. The Monte Carlo simulations indicate that the polarization losses observed in the experiments are a result of instrumental artifacts that can be easily corrected in future experiments.

A new design for the standard pinhole small-angle neutron scattering instrument D11

2007 ◽  
Vol 40 (6) ◽  
pp. 1056-1063 ◽  
Author(s):  
Klaus Lieutenant ◽  
Peter Lindner ◽  
Roland Gahler
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Neutron Scattering ◽  
Cross Section ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Nominal Size ◽  
Guide System ◽  
Sans Instrument ◽  
Renewal Project

Monte Carlo simulations have been performed to check ideas for improvements of the collimating guide system of the standard pinhole small-angle neutron scattering (SANS) instrument D11 at Institut Laue–Langevin, which reaches very lowQvalues by using long detector and collimation distances. According to the simulations, improved guide characteristics can increase the flux at the sample by about 10–15% for short collimation distances. Widening the guide width over the first few metres by 50% will yield a flux gain of about 40% for long and intermediate collimation distances, but a loss for short distances. A gain for all collimation distances can be achieved by a reduction of the guide cross section over the last few metres (in addition to the widening). The best performance was found for a quasi-elliptical exit that reduces width and height to 60% of its nominal size. The effect on divergence of the neutron arriving at the sample has been studied. The changes will be realized in the framework of the ongoing D11 renewal project.

scholarly journals Determination of Internal Density Profiles of Smart Acrylamide-Based Microgels by Small-Angle Neutron Scattering: A Multishell Reverse Monte Carlo Approach

Langmuir ◽  
2018 ◽  
Vol 34 (50) ◽  
pp. 15403-15415 ◽  
Author(s):  
Marian Cors ◽  
Lars Wiehemeier ◽  
Yvonne Hertle ◽  
Artem Feoktystov ◽  
Fabrice Cousin ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Reverse Monte Carlo ◽  
Density Profiles ◽  
Monte Carlo Approach

scholarly journals Solution structure of macromolecules using small angle neutron scattering and molecular simulations

2020 ◽  
Vol 236 ◽  
pp. 03003
Author(s):  
Jayesh S. Bhatt
Keyword(s):  
Molecular Dynamics ◽  
Monte Carlo ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Solution Structure ◽  
Molecular Simulations ◽  
Liquid Solution ◽  
Scattering Data ◽  
Monte Carlo Techniques

An introductory account of using molecular simulations to deduce solution structure of macromolecules using small angle neutron scattering data is presented for biologists. The presence of a liquid solution provides mobility to the molecules, making it difficult to pin down their structure. Here a simple introduction to molecular dynamics and Monte Carlo techniques is followed by a recipe to use the output of the simulations along with the scattering data in order to infer the structure of macromolecules when they are placed in a liquid solution. Some practical issues to be watched for are also highlighted.

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