TY  - JOUR
A1  - Giewekemeyer, K.
A1  - Krueger, S. P.
A1  - Kalbfleisch, S.
A1  - Bartels, Meike
A1  - Beta, Carsten
A1  - Salditt, T.
T1  - X-ray propagation microscopy of biological cells using waveguides as a quasipoint source
JF  - Physical review : A, Atomic, molecular, and optical physics
N2  - We have used x-ray waveguides as highly confining optical elements for nanoscale imaging of unstained biological cells using the simple geometry of in-line holography. The well-known twin-image problem is effectively circumvented by a simple and fast iterative reconstruction. The algorithm which combines elements of the classical Gerchberg-Saxton scheme and the hybrid-input-output algorithm is optimized for phase-contrast samples, well-justified for imaging of cells at multi-keV photon energies. The experimental scheme allows for a quantitative phase reconstruction from a single holographic image without detailed knowledge of the complex illumination function incident on the sample, as demonstrated for freeze-dried cells of the eukaryotic amoeba Dictyostelium discoideum. The accessible resolution range is explored by simulations, indicating that resolutions on the order of 20 nm are within reach applying illumination times on the order of minutes at present synchrotron sources.
Y1  - 2011
U6  - https://doi.org/10.1103/PhysRevA.83.023804
SN  - 1050-2947
VL  - 83
IS  - 2
PB  - American Physical Society
CY  - College Park
ER  - 
TY  - JOUR
A1  - Schubert, Mikkel
A1  - Jonsson, Hakon
A1  - Chang, Dan
A1  - Sarkissian, Clio Der
A1  - Ermini, Luca
A1  - Ginolhac, Aurelien
A1  - Albrechtsen, Anders
A1  - Dupanloup, Isabelle
A1  - Foucal, Adrien
A1  - Petersen, Bent Larsen
A1  - Fumagalli, Matteo
A1  - Raghavan, Maanasa
A1  - Seguin-Orlando, Andaine
A1  - Korneliussen, Thorfinn S.
A1  - Velazquez, Amhed M. V.
A1  - Stenderup, Jesper
A1  - Hoover, Cindi A.
A1  - Rubin, Carl-Johan
A1  - Alfarhan, Ahmed H.
A1  - Alquraishi, Saleh A.
A1  - Al-Rasheid, Khaled A. S.
A1  - MacHugh, David E.
A1  - Kalbfleisch, Ted
A1  - MacLeod, James N.
A1  - Rubin, Edward M.
A1  - Sicheritz-Ponten, Thomas
A1  - Andersson, Leif
A1  - Hofreiter, Michael
A1  - Marques-Bonet, Tomas
A1  - Gilbert, M. Thomas P.
A1  - Nielsen, Rasmus
A1  - Excoffier, Laurent
A1  - Willerslev, Eske
A1  - Shapiro, Beth
A1  - Orlando, Ludovic
T1  - Prehistoric genomes reveal the genetic foundation and cost of horse domestication
JF  - Proceedings of the National Academy of Sciences of the United States of America
Y1  - 2014
U6  - https://doi.org/10.1073/pnas.1416991111
SN  - 0027-8424
VL  - 111
IS  - 52
SP  - E5661
EP  - E5669
PB  - National Acad. of Sciences
CY  - Washington
ER  -