Results 41 to 50 of about 133,733 (246)

Fabrication and characterization of a full-size ultra-precise lamellar grating for the Cosmic beamline at ALS-U

Journal of Synchrotron Radiation
We have developed a new process for the production of ultra-precise variable line spacing (VLS) lamellar diffraction gratings through nanofabrication. The process enables the fabrication of full-size X-ray gratings with sub-nanometre accuracy in groove ...
Dmitriy Voronov, Sooyeon Park, Lei Huang, Antoine Islegen-Wojdyla, Eric Gullikson, Howard Padmore, Tianyi Wang, Mourad Idir   +7 more
doaj   +1 more source

Diffraction Focal Position and Vector Diffraction Theory for Micro Holographic Storage Systems

Applied Sciences, 2014
In this study, we proposed a method to determine the optimal focal position for micro-holographic storage systems, using vector diffraction theory; the theory provides exact solutions when the numerical aperture (NA) exceeds 0.6.
Cheol-Ki Min, Hyungbae Moon, Do-Hyung Kim, No-Cheol Park, Kyoung-Su Park, Young-Pil Park   +5 more
doaj   +1 more source

High Efficiency Electron Diffractive Optics [PDF]

Microscopy and Microanalysis, 2013
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
J.S. Pierce, T.R. Harvey, T.S. Yahn, B.J. McMorran   +3 more
openaire   +1 more source

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Gelatin as a Photosensitive Material

Molecules, 2018
Because this issue journal is dedicated to Gelatin, here we present a few applications of gelatin in the field of optics. Optics is the science that studies the production, propagation, interaction and detection of light.
Sergio Calixto, Nina Ganzherli, Sergey Gulyaev, Susana Figueroa-Gerstenmaier   +3 more
doaj   +1 more source

Energy efficiency of a new trifocal intraocular lens [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
The light distribution among the far, intermediate and near foci of a new trifocal intraocular lens (IOL) is experimentally determined, as a function of the pupil size, from image analysis. The concept of focus energy efficiency is introduced because, in
Vega F., Alba-Bueno F., Millán M. S.
doaj   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Methodology for determining temperature dependences of the diffraction efficiency of two-layer two-relief microstructures in the framework of a rigorous coupled-wave analysis

Компьютерная оптика
Aiming to calculate the diffraction efficiency of diffractive optical elements with a two-layer microstructure and two internal sawtooth reliefs within the framework of the rigorous electromagnetic theory of diffraction, we propose an approach that ...
A.I. Antonov, G.I. Greisukh
doaj   +1 more source

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source