Results 161 to 170 of about 2,741 (204)

Health safety issues of synthetic food colorants

Regulatory Toxicology and Pharmacology, 2015
Increasing attention has been recently paid to the toxicity of additives used in food. The European Parliament and the Council published the REGULATION (EC) No. 1333/2008 on food additives establishing that the toxicity of food additives evaluated before 20th January 2009 must be re-evaluated by European Food Safety Authority (EFSA).
Petra, Amchova, Hana, Kotolova, Jana, Ruda-Kucerova   +2 more
openaire   +2 more sources

The effect of some color centers on the coloration of natural and synthetic diamonds

Journal of Superhard Materials, 2008
Mechanisms of the formation of diamond coloration caused by the light absorption by basic impurity defects, which are optically active in the visible region, have been studied. The analytical relationships between the relative concentration of each defect and the diamond main color tone and saturation have been derived.
Yu. A. Klyuev, A. M. Naletov
openaire   +1 more source

The Coloration of Synthetic Polymeric Materials

Journal of the Society of Dyers and Colourists, 1969
Two very interesting and successful innovations were the running of simultaneous sessions on the Thursday morning—one on dyeing theory and the other on dyeing practice—and the introduction of a panel discussion on the Friday afternoon.
openaire   +1 more source

The photodegradation of synthetic colorants

1996
The action of light on dyes, whether in solution or on textile materials, involves a complex series of processes. Although it is over 100 years since Bancroft1 reported that the light-induced fading of dyes proceeds by oxidation at times and by reduction at other times, the photodegradation of synthetic dyes continues to be a commercially important ...
openaire   +1 more source

Analytical Chemistry of Synthetic Colorants

1995
X-ray powder diffraction of synthetic organic colorants. Solid state nuclear magnetic resonance spectroscopy of synthetic dyes. Near infrared spectroscopy. Mass spectrometry. Electron spin resonance spectroscopy. Microspectrophotometry. Emission spectroscopy. Identification and analysis of diarylide pigments by spectroscopic and chemical methods. Index.
openaire   +1 more source

Synthetic coloring of fractal terrains and triangular automata

The Visual Computer, 1995
Simple coloring schemes for fractal terrains can easily be generated. They include false coloring schemes that give information about the landscape and realistic coloring schemes. Triangular automata are introduced and used to simulated rock texture and vegetation.
openaire   +2 more sources

Synthetic Diamond for Color Center Lasers

Advanced Solid State Lasers, 1986
Color centers which are substitutional in character, like many of the nitrogen-related defects in diamond, are well suited to the achievement of tunable laser action at room temperature. In particular, high densities of H3 centers permit efficient, stable generation of coherent visible radiation /1/ in the spectral range 500–600 nm.
openaire   +1 more source

Synthetic Colorants

2005
M Beatriz, A Gloria
openaire   +2 more sources

Generation and structure elucidation of a red colorant formed by oxidative coupling of chlorogenic acid and tryptophan

Food Chemistry, 2023
Jeroen S Dickschat, Andreas Schieber, Fabian Weber   +2 more
exaly  

Carbon-dot dispersal in PVA thin film for food colorant sensing

Journal of Environmental Chemical Engineering, 2020
C P Leo
exaly