Results 41 to 50 of about 6,384 (220)

Color perception in natural images [PDF]

Current Opinion in Behavioral Sciences, 2019
This review of color processing in natural image viewing – rather than artificial laboratory images – addresses the role of color edges. Much of the color variation in nature is a result of evolutionary processes in complex organisms that have developed eye-brain systems that use color signals for a variety of biological functions.
Tyler, C. W., Solomon, J. A.
openaire   +2 more sources

Biobased Polyurethane Films Based on Andiroba (Carapa guianensis) and Buriti (Mauritia flexuosa) Oil Polyols

Journal of Applied Polymer Science, EarlyView.
Polyurethane films were prepared from andiroba (Carapa guianensis) and buriti (Mauritia flexuosa) oil‐derived polyols, emphasizing their potential as bio‐based materials. UV–Vis analysis indicates the retention of carotenoid‐related chromophoric features within the polymer matrix.
João A. P. da Silva, Amanda L. Ferreira, Felipe F. C. Tavares, Chana M. da Silva, Cesar L. Petzhold, Nilo S. M. Cardozo   +5 more
wiley   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

Study on the non labeled synthetic colorants were detected in natural food pigments and condiment

Zhongguo shipin weisheng zazhi
ObjectiveThe method of high performance liquid chromatography （HPLC） was developed to study the detection of synthetic colorants in natural pigments and condiment.MethodsThe analytes were extracted by direct ultrasonic extraction with water. The analytes
WEI Yutao, WEN Quan, TANG Weiying, ZHONG Ciping, YU Xiaoqin, LI Shucai, XU Feng, SU Yan, TANG Ruiyi   +8 more
doaj   +1 more source

Modeling of Color and Degradation of C‐Phycocyanin Extracted From Arthrospira platensis and Chlorogloeopsis HTF

Chemie Ingenieur Technik, EarlyView.
A nonlinear kinetic model was developed and successfully implemented, which describes the degradation of the protein C‐phycocyanin depending on temperature and pH value. C‐phycocyanin had been extracted from two different cyanobacteria. In addition to protein degradation, the fading of the typical blue color of this protein was included in the model ...
Martina Kießling, Knut Franke, Viggó Marteinsson, René Groben, Volker Heinz, Kemal Aganovic   +5 more
wiley   +1 more source

Chemical engineering as an essential element of industrial biotechnology in Mexico: New aims in research and university education

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract On the centennial of higher education in Chemical Engineering in Mexico, it is pertinent to revisit the key stages that have contributed to its consolidation as a vital discipline for the nation's scientific and technological advancement. Although the initial mission of chemical engineering education was primarily oriented toward the training ...
Agustín López Munguía, Octavio T. Ramírez, Rafael Vazquez‐Duhalt, Eduardo Bárzana   +3 more
wiley   +1 more source

Transition Metal Compounds as Thermochromic Materials: Classification, Properties, Limitations, and Applications

EcoEnergy, EarlyView.
This review systematically examines how different transition metal compounds—such as binary and multinary metal oxides, halides, sulfides, and salts—exhibit thermochromism based on the d‐electron configurations of their transition metal cations. It focuses on three main mechanisms of thermochromism: phase transition, charge transfer, and bandgap change.
Jie Wang, Shan Wang, Long Yuan, Ling Zuo, Hui Qi, Changmin Hou   +5 more
wiley   +1 more source

Multielemental Analysis and In Vitro Evaluation of Free Radical Scavenging Activity of Natural Phytopigments by ICP-OES and HPTLC

Frontiers in Pharmacology, 2021
The phytopigments derived from ethnomedicinal plants employed as traditional medicines appear to be the simplest alternative for artificial radical colorants.
S. M. Nandanwadkar, P. J. Hurkadale, C. M. Bidikar, M. M. Godbole   +3 more
doaj   +1 more source

On the Planarity of Heterocyclic Bay‐Substituted Perylenediimides: Insight into the Fluorescent Photoinduced Electron Transfer Sensing Framework

European Journal of Organic Chemistry, EarlyView.
Near‐infrared fluorescent pH indicators based on perylenediimide were constructed in a modular receptor–spacer–fluorophore–spacer–receptor format with heterocyclic amino moieties at the bay positions. Counterintuitively, the dibrominated intermediate with two heavy atoms is more emissive than the heterocyclic compounds.
Luke Camenzuli, Davide Benedetto Tiz, Nicola’ Agius, Konrad Szaciłowski, David C. Magri   +4 more
wiley   +1 more source

Visible freshness: Natural pH-sensitive indicator films for intelligent food packaging

Industrial Crops and Products
Natural pH-responsive indicator film has become a research hotspot in the field of intelligent food packaging because of its environmental friendliness, sensitive pH-responsive ability and good biocompatibility.
Taoyang Cai, Yanxing Xia, Yanru Liu, Feng Zhang, Hongbo Mu, Shangjie Ge-Zhang   +5 more
doaj   +1 more source