Results 71 to 80 of about 643,248 (351)

Aberration-free ultra-thin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces

, 2012
The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength spaced optical antennas.
Aieta F., Artl J., Blanchard R., Bobb D. A., Cai W., Encinar J. A., Fattal D., Federico Capasso, Francesco Aieta, Genevet P., Hecht E., Huang F. M., Huang F. M., Jarutis V., Kats M. A., Kinglsake R., Koppens F. H.L., Liu Z., Lu F., Manek I., McGrath D. T., McLeod J. H., McLeod J. H., Mikhail A. Kats, Nanfang Yu, Ni X., Padilla P., Patrice Genevet, Pendry J. B., Pozar D. M., Pozar D. M., Ren. Q., Rogers E. T. F., Romain Blanchard, Ryan C. G. M., Smith D. R., Tetienne J. P., Verslegers L, West P. R., Yu N., Zeno Gaburro   +40 more
core   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source

IOL decentration sensitivity according to spatial frequencies

BMJ Open Ophthalmology
Background/aims Investigation of the decentration sensitivity of monofocal intraocular implants with a focus on different aberration corrections depending on different spatial frequencies.Methods Using an optical bench, the decentration sensitivities of ...
Daniel Schartmüller, Katharina Kriechbaum, Stefan Pieh, Cornelia Artmayr   +3 more
doaj   +1 more source

Characteristics of corneal aberration in patients with bilateral keratoconus and unilateral corneal Vogt’s striae [PDF]

International Journal of Ophthalmology
AIM: To assess the corneal high-order aberration (HOA) and its correlation with corneal morphological parameters in patients with bilateral keratoconus (KCN) and unilateral Vogt's striae.
Sheng-Sheng Wei, Yong Li, Zhi-Qing Wu, Jian-Guo Liu, Jing Du, Jing Li, Yao-Hua Zhang   +6 more
doaj   +1 more source

Combined conjugate and pupil adaptive optics in widefield microscopy [PDF]

, 2016
Traditionally, adaptive optics (AO) systems for microscopy have focused on AO at the pupil plane, however this produces poor performance in samples with both spatially-variant aberrations, such as non-flat sample interfaces, and spatially-invariant ...
Beaulieu, Devin Robert
core   +1 more source

X-ray Near Field Speckle: Implementation and Critical Analysis [PDF]

, 2011
We have implemented the newly-introduced, coherence-based technique of x-ray near-field speckle (XNFS) at 8-ID-I at the Advanced Photon Source. In the near field regime of high-brilliance synchrotron x-rays scattered from a sample of interest, it turns ...
A. R. Sandy, Alaimo, Batchelor, Bonse, Cerbino, Diat, Dierker, Ehrburger-Dolle, Falus, Giglio, Gouy, Ilavsky, Ilavsky, Koch, Konishi, Lu, M. Sprung, Martin, Mochrie, Narayanan, Narayanan, Pontoni, S. G. J. Mochrie, S. Narayanan, Shinohara, Sutton, Xinhui Lu   +26 more
core   +3 more sources

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Atom focusing by far-detuned and resonant standing wave fields: Thin lens regime [PDF]

, 1999
The focusing of atoms interacting with both far-detuned and resonant standing wave fields in the thin lens regime is considered. The thin lens approximation is discussed quantitatively from a quantum perspective. Exact quantum expressions for the Fourier
A.G. Rojo, B. Dubetsky, B. Dubetsky, B. Dubetsky, B. Dubetsky, C. Kurtseifer, C.V. Raman, G. Timp, H.F. Talbot, I.S. Gradshteyn, J. L. Cohen, J. Schmiedmayer, J.J. McClelland, J.J. McClelland, J.J. McClelland, J.L. Cohen, K. Berggren, K. Patorski, K.K. Berggren, K.S. Johnson, M. Kozuma, M. Prentiss, M.-O. Mewes, M.S. Chapman, P. R. Berman, R. Gupta, R.E. Behringer, R.E. Behringer, R.J. Celotta, S. Nowak, S. Nowak, S.B. Cahn, T. Sleator, U. Drodofsky, U. Drodofsky, U. Janicke, V. Natarajan, V.I. Balykin, V.P. Chebotayev, W.R. Anderson   +39 more
core   +2 more sources

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Debye representation of dispersive focused waves [PDF]

, 2006
We report on a matrix-based diffraction integral that evaluates the focal field of any diffraction-limited axisymmetric complex system. This diffraction formula is a generalization of the Debye integral applied to apertured focused beams, which may be ...
Amako, Ashman, Barad, Bartels, Carlos J. Zapata-Rodríguez, Cernusca, Codling, Collet, Collins, Corkum, Dharmadhikari, Gbur, Ibragimov, Kempe, Kempe, Konig, Lancis, Lancis, Levy, Li, Martínez-Corral, Moreno, Morris, Oron, Pearce, Sheppard, Wadsworth, Wolf, Yura, Zapata-Rodríguez, Zapata-Rodríguez, Zapata-Rodríguez, Zapata-Rodríguez, Zeng, Zhu   +34 more
core   +2 more sources