Results 21 to 30 of about 4,274,938 (365)

Crystal symmetry determination in electron diffraction using machine learning [PDF]

open access: yesScience, 2019
Speedy crystallography Electron backscatter diffraction is one standard technique for determining crystal structure, typically of materials or geological samples.
Kevin Kaufmann   +6 more
semanticscholar   +1 more source

X-ray crystal structure of cytotoxic oxidized cholesterols: 7-ketocholesterol and 25-hydroxycholesterol

open access: yesJournal of Lipid Research, 1997
The cytotoxic cholesterol derivative, 7-ketocholesterol, crystallizes in a monoclinic unit cell, space group P2(1) with a = 11.405 A, b = 6.288 A, c = 35.393 A and beta = 92.75 degrees (Z = 4).
M P McCourt   +6 more
doaj   +1 more source

Structural determination and packing analysis of a cholesteryl caprate/cholesteryl laurate solid solution.

open access: yesJournal of Lipid Research, 1994
This paper describes the X-ray crystal structure analysis of a cholesteryl ester solid solution, cholesteryl decanoate/cholesteryl laurate, grown from a bulk concentration with molar ratio 0.56/0.43. The unit cell is monoclinic with a = 12.969, b = 9.048,
M.P. McCourt   +3 more
doaj   +1 more source

Single-Shot Electron Diffraction using a Cold Atom Electron Source [PDF]

open access: yes, 2015
Cold atom electron sources are a promising alternative to traditional photocathode sources for use in ultrafast electron diffraction due to greatly reduced electron temperature at creation, and the potential for a corresponding increase in brightness ...
McCulloch, Andrew J.   +5 more
core   +2 more sources

Cholesteryl esters of saturated fatty acids: cosolubility and fractionation of binary mixtures

open access: yesJournal of Lipid Research, 1987
Factors affecting the solid state miscibility of saturated chain cholesteryl esters were determined from electron diffraction and differential scanning calorimetric measurements on a homologous series which included two types of crystal packing. Electron
D L Dorset
doaj   +1 more source

Mega-electron-volt Microcrystal Electron Diffraction [PDF]

open access: yesStructural Dynamics
Characterization of atomic structure in matter benefits significantly from mega-electron-volt (MeV) electron beams, which offer enhanced penetration depths and substantially reduced multiple scattering effects compared to conventional kilo-electron-volt (
Xiaozhe Shen, Duan Luo, Xijie Wang
doaj   +1 more source

Liquid-phase mega-electron-volt ultrafast electron diffraction

open access: yesStructural Dynamics, 2020
The conversion of light into usable chemical and mechanical energy is pivotal to several biological and chemical processes, many of which occur in solution.
J. P. F. Nunes   +20 more
doaj   +1 more source

Ultrafast electron diffraction of THz-excited nanostructures [PDF]

open access: yesEPJ Web of Conferences, 2019
We study the electromagnetic response of nanostructures to single-cycle THz excitation by using ultrafast electron diffraction. Although the nanostructures themselves are static, there exist complex sub-THz-cycle Bragg spot dynamics that relate via time ...
Mohler Kathrin J., Baum Peter
doaj   +1 more source

X-Ray sum frequency generation; direct imaging of ultrafast electron dynamics [PDF]

open access: yes, 2018
X-ray diffraction from molecules in the ground state produces an image of their charge density, and time-resolved X-ray diffraction can thus monitor the motion of the nuclei.
Bennett, Kochise   +3 more
core   +2 more sources

Exploring transmission Kikuchi diffraction using a Timepix detector [PDF]

open access: yes, 2017
Electron backscatter diffraction (EBSD) is a well-established scanning electron microscope (SEM)-based technique [1]. It allows the non-destructive mapping of the crystal structure, texture, crystal phase and strain with a spatial resolution of tens of ...
Maneuski, D.   +5 more
core   +1 more source

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