Results 11 to 20 of about 2,632,364 (306)

Advances in Betalain Biosynthesis and Metabolic Engineering for Sustainable Natural Pigment Production [PDF]

BioTech
Betalains are water-soluble pigments containing nitrogen, and they exist naturally in the plants of the order Caryophyllales. They have gained increasing attention in recent years because of their intense colours, antioxidant activity, and safety, thus ...
Saravanan Monisha, Marimuthu Kanchana, Aiyar Balasubramanian, Rajendran K. Selvakesavan   +3 more
doaj   +2 more sources

MALDI-TOF mass spectrometric identification of dyes and pigments [PDF]

Journal of the American Society for Mass Spectrometry, 2007
We have used MALDI-TOF mass spectrometry to characterize a selection of dyes from the Schweppe dye collection and pigments from the Tate Gallery collection. MALDI-TOF mass spectra of such samples are easily obtained and, through observation of both positive and negative ion spectra, provide a convenient, versatile method for dye characterization and ...
Soltzberg, L.J., Hagar, Amanda, Kridaratikorn, Supicha, Mattson, Anne, Newman, Richard   +4 more
openaire   +4 more sources

Reflectance Imaging Spectroscopy (RIS) for Operation Night Watch: Challenges and Achievements of Imaging Rembrandt’s Masterpiece in the Glass Chamber at the Rijksmuseum

Sensors, 2021
Visible and infrared reflectance imaging spectroscopy is one of the several non-invasive techniques used during Operation Night Watch for the study of Rembrandt’s iconic masterpiece The Night Watch (1642).
Francesca Gabrieli, John K. Delaney, Robert G. Erdmann, Victor Gonzalez, Annelies van Loon, Patrick Smulders, Roy Berkeveld, Robert van Langh, Katrien Keune   +8 more
doaj   +1 more source

A Comparative Study of the Method to Rapid Identification of the Mural Pigments by Combining LIBS-Based Dataset and Machine Learning Methods

Chemosensors, 2022
Due to the similar chemical composition and matrix effect, the accurate identification of mineral pigments on wall paintings has brought great challenges.
Duixiong Sun, Yiming Zhang, Yaopeng Yin, Zhao Zhang, Hengli Qian, Yarui Wang, Zongren Yu, Bomin Su, Chenzhong Dong, Maogen Su   +9 more
doaj   +1 more source

Mapping Pigments in a Painting with Low Frequency Electron Paramagnetic Resonance Spectroscopy

Heritage, 2021
An electron paramagnetic resonance (EPR) mobile universal surface explorer (MOUSE) was recently introduced for noninvasively studying paramagnetic pigments in paintings.
Shane McCarthy, Haley Wiskoski, Joseph P. Hornak   +2 more
doaj   +1 more source

Identification of Chromobacterium violaceum: Pigmented and Non-pigmented Strains [PDF]

Journal of General Microbiology, 1975
The classification and, therefore, identification of Chromobacterium violaceum has been based upon its ability to produce a violet pigment. Although the organism may yield non-pigmented variants when subcultured on artificial media, the isolation of non-pigmented strains from pathological tissues or from nature had not been reported.
R. SIVENDRA, H. S. LO, K. T. LIM
openaire   +2 more sources

Towards building a Cathodoluminescence (CL) database for pigments: characterization of white pigments

Heritage Science, 2021
Paintings and painted surfaces are considered to be extremely complex due to their multitude of materials and thus form the basis for particularly intricate Cultural Heritage studies.
E. Palamara, P. P. Das, S. Nicolopoulos, L. Tormo Cifuentes, E. Kouloumpi, A. Terlixi, N. Zacharias   +6 more
doaj   +1 more source

Effectiveness of Fumigation using Carbon dioxide on the ancient Egyptian pigments applied on ancient wooden artifacts [PDF]

مجلة کلية الآثار - جامعة القاهرة, 2023
The sterilization of organic objects using Carbon dioxide is one of the safest methods which used in conservation of organic materials which eliminates the presence of insects and other aerobic organisms.
Elsayda NafesaEl-Shamy, Ahmed Khairy
doaj   +1 more source

Chromatographic Techniques to Separate and Identify Bioactive Compounds in Microalgae

Frontiers in Energy Research, 2022
Microalgae are potential sources for the sustainable production of valuable chemicals including polyphenols, pigments, and ω-3 PUFAs. However, successful exploitation of these high value compounds in the food, healthcare and pharmaceutical sectors ...
Hossein Kiani, Hossein Kiani, Hossein Kiani, Ramón Aznar, Mahesha M. Poojary, Brijesh K. Tiwari, Ronald Halim, Ronald Halim   +7 more
doaj   +1 more source

A Novel Spectral Matching Approach for Pigment: Spectral Subsection Identification Considering Ion Absorption Characteristics

Remote Sensing, 2020
Background: Hyperspectral technology has made it possible to perform completely non-invasive investigations on pigment analysis, in particular, on pigment identification.
Yiyi Liu, Shuqiang Lyu, Miaole Hou, Zhenhua Gao, Wanfu Wang, Xiao Zhou   +5 more
doaj   +1 more source