Results 21 to 30 of about 1,439,788 (292)

Quantification of Optical Chirality in Cellulose Nanocrystal Films Prepared by Shear-Coating

open access: yesApplied Sciences, 2021
Evaporation-induced-self-assembly is widely used to produce chiral cellulose nanocrystal (CNC) free-standing films reflecting left-handed polarized light. Research on supported chiral CNC films is rather scarce.
Olga Rubí Juárez-Rivera   +4 more
doaj   +1 more source

Freeze-derived heterogeneous structural color films

open access: yesNature Communications, 2022
While most of the structural colored materials only present isotropic colors, limiting their functions and many practical applications, while realizing anisotropic structural color materials remains challenging. Here, the authors develop a freeze-derived
Shuangshuang Miao   +3 more
doaj   +1 more source

Towards an Isomorphism Dichotomy for Hereditary Graph Classes [PDF]

open access: yes, 2014
In this paper we resolve the complexity of the isomorphism problem on all but finitely many of the graph classes characterized by two forbidden induced subgraphs.
Schweitzer, Pascal
core   +3 more sources

A research note: effect of pH on meat iridescence in precooked cured pork

open access: yesBMC Research Notes, 2022
Objective The objective of this study was to investigate the effect of pH change of cooked cured pork M. longissimus thoracis et lumborum on iridescence intensity and extent (= percentage of iridescent area) since interaction with light may be related to
Chiara Ruedt, Monika Gibis, Jochen Weiss
doaj   +1 more source

Wide Field CCD Surface Photometry of the Giant Elliptical Galaxy NGC 4472 in the Virgo Cluster [PDF]

open access: yes, 2000
We present deep wide field (16'.4 x 16'.4) Washington CT1 CCD surface photometry of the giant elliptical galaxy NGC 4472, the brightest member in the Virgo cluster.
Geisler, Doug   +2 more
core   +3 more sources

Shear-Coated Linear Birefringent and Chiral Cellulose Nanocrystal Films Prepared from Non-Sonicated Suspensions with Different Storage Time

open access: yesNanomaterials, 2021
Nanocelluloses are very attractive materials for creating structured films with unique optical properties using different preparation techniques. Evaporation-induced self-assembly of cellulose nanocrystals (CNC) aqueous suspensions produces iridescent ...
Olga Rubi Juárez-Rivera   +4 more
doaj   +1 more source

Structural color in Myxomycetes

open access: yesOptics Express, 2010
In this paper we report evidence of structural color in Myxomycetes, a group of eukaryotic microorganisms with an uncertain taxonomic position. We investigated the Diachea leucopoda, which belongs to the Physarales order, Myxomycetes class, and found that its peridium -protective layer that encloses the mass of spores- is basically a corrugated layer ...
Marina E. Inchaussandague   +3 more
openaire   +2 more sources

BVRI Surface Photometry of Isolated Spiral Galaxies [PDF]

open access: yes, 2007
A release of multicolor broad band (BVRI) photometry for a subsample of 44 isolated spirals drawn from the Catalogue of Isolated Galaxies (CIG) is presented.
Abraham R. G.   +13 more
core   +4 more sources

Optimization of sharp and viewing-angle-independent structural color [PDF]

open access: yes, 2015
Structural coloration produces some of the most brilliant colors in nature and has many applications. However, the two competing properties of narrow bandwidth and broad viewing angle have not been achieved simultaneously in previous studies.
Hsu, Chia Wei   +3 more
core   +2 more sources

On Structural Parameterizations of Star Coloring

open access: yes, 2023
A Star Coloring of a graph G is a proper vertex coloring such that every path on four vertices uses at least three distinct colors. The minimum number of colors required for such a star coloring of G is called star chromatic number, denoted by χ_s(G).
Sriram Bhyravarapu, I. Vinod Reddy
openaire   +2 more sources

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