Results 1 to 10 of about 2,632,364 (306)

Spinochrome Identification and Quantification in Pacific Sea Urchin Shells, Coelomic Fluid and Eggs Using HPLC-DAD-MS

Marine Drugs, 2021
The high-performance liquid chromatography method coupled with diode array and mass spectrometric detector (HPLC-DAD-MS) method for quinonoid pigment identification and quantification in sea urchin samples was developed and validated. The composition and
Elena A. Vasileva, Natalia P. Mishchenko, Van T. T. Tran, Hieu M. N. Vo, Sergey A. Fedoreyev   +4 more
doaj   +1 more source

Colour cluster analysis for pigment identification [PDF]

SPIE Proceedings, 2008
This paper presents image processing algorithms designed to analyse the colour CIE Lab histogram of high resolution images of paintings. Three algorithms are illustrated which attempt to identify colour clusters, cluster shapes due to shading and finally to identify pigments.
Martinez, Kirk, Goodall, Simon
openaire   +1 more source

Pigments Characterization and Molecular Identification of Bacterial Symbionts of Brown Algae Padinasp. Collected from Karimunjawa Island

Ilmu Kelautan, 2016
The search for carotenoids in nature has been extensively studied because of their applications in foods. One treasure of the biopigment source is symbiotic-microorganisms with marine biota.
Damar Bayu Murti, A B Susanto, Ocky Karna Radjasa, Ferdy Semuel Rondonuwu   +3 more
doaj   +1 more source

FORS, Fiber Optics Reflectance Spectroscopy con gli spettrometri miniaturizzati per l’identificazione dei pigmenti

Archeomatica, 2014
Questo articolo riporta i risultati del test di un sistema FORS (Fiber Optics Reflectance Spectroscopy) assemblato con componenti Ocean Optics. Questa ditta ha sviluppato una linea di spettrometri miniaturizzati e dal costo estremamente contenuto.
Antonino Cosentino
doaj  

Pigment compositions in Siberian early Upper Paleolithic complexes

UISPP Journal, 2021
Cultural assemblages associated with archaic forms of Homo sapiens in Siberia appeared around 40 000 – 50 000 years BP, revealing the evidence of the modern behavioural complex and use of various pigments.
Liudmila Lbova
doaj   +1 more source

Panoramic, Macro and Micro Multispectral Imaging: An Affordable System for Mapping Pigments on Artworks

Journal of Conservation and Museum Studies, 2015
Multispectral imaging systems are used in art examinations to map and identify pigments, binders and areas of retouching. A monochromatic camera is combined with an appropriate wavelength selection system and acquires a variable ...
Antonino Cosentino
doaj  

Looking at the Modern to Better Understand the Ancient: Is It Possible to Differentiate Mars Pigments from Archaeological Ochres?

Heritage
This article offers a discussion of the possibility of distinguishing ochres from Mars pigments. The discussion addresses technological, archaeological, and artistic aspects.
Maria Cecilia Carangi, Cristina Corti, Laura Rampazzi   +2 more
doaj   +1 more source

Exploration, Isolation, and Identification of Carotenoid from Bacterial Symbiont of Sponge Callyspongia vaginalis

Ilmu Kelautan, 2017
During the past two decades research on marine bacteria has highlighted the tremendous potential of symbiotic-microorganisms as a source of bioactive secondary.
Iqna Kamila Abfa, Ocky Karna Radjasa, A B Susanto, Handung Nuryadi, Ferry F. Karwur   +4 more
doaj   +1 more source

High performance liquid chromatography as a micro-destructive technique for the identification of anthraquinone red dyestuffs in cultural heritage objects

Chemistry Teacher International, 2023
This article describes two of the most common natural sources of red anthraquinones that have been used since antiquity for textile dyeing and as lake pigments, namely cochineal insect and the roots of Rubia and Relbunium plants.
Careaga Valeria P., Blanco Guerrero Astrid, Siracusano Gabriela, Maier Marta S.   +3 more
doaj   +1 more source

Identification of organic pigments in tattoo inks and permanent make-up using laser desorption ionisation mass spectrometry [version 2; referees: 2 approved]

F1000Research, 2018
Nowadays, about 12% of the European and 20% of the US population are tattooed. Rising concerns regarding consumer safety, led to legal restrictions on tattoo and permanent make-up (PMU) inks. Restrictions also include bans on certain colourants. Both ink
Markus Niederer, Urs Hauri, Lydia Kroll, Christopher Hohl   +3 more
doaj   +1 more source