Results 11 to 20 of about 2,696,726 (300)

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   +4 more sources

Identification of black sturgeon caviar pigment as eumelanin [PDF]

Food Chemistry, 2022
Reported herein is the purification of the pigment of black sturgeon caviar and its unambiguous identification as a typical eumelanin by means of chemical degradation coupled with electron paramagnetic resonance (EPR) evidence. HPLC and LC-MS analysis of oxidative degradation mixtures revealed the formation of pyrrole-2,3,5-tricarboxylic acid (PTCA), a
Panzella L., Benning K., Nesbeth D. N., Setaro B., D'Errico G., Napolitano A., d'Ischia M.   +6 more
core   +7 more sources

Isolation and identification of pigment-producing filamentous fungus DBFL05 and its pigment characteristics and chemical structure

CyTA - Journal of Food, 2023
Natural pigments derived from microorganisms have many advantages and are widely studied in the food industry. A filamentous fungus, DBFL05, was identified as Aspergillus ustus, which produces a bright and abundant brown pigment.
Minghui Zhou, Yajun Chen, Xue Fang, Li Wu, Yan Zhang   +4 more
doaj   +3 more sources

Identification of the orange pigment in Nonomuraea gerenzanensis and development of a pigment-free mutant

AMB Express
The secondary metabolite A40926, a precursor to the glycopeptide antibiotic dalbavancin, is synthesized by the rare actinomycete Nonomuraea gerenzanensis (N. gerenzanensis) within the pharmaceutical industry.
Yutong Cheng, Wen Gao, Shi Shi, Fubo Han, Huijun Dong   +4 more
doaj   +3 more sources

Identification of a Red Pigment-Producing Strain of Arthrobacter spp. and the Stability of Its Pigments

Microorganisms
With the rise of environmental protection and health topics in recent years, microbial production of red pigments has gradually become a research hotspot. Red pigment possesses biological properties such as anticancer and antioxidant activities and has a
Jinjun Wang, Mingliang Yang, Xinru Gao
doaj   +4 more sources

Applications of visible spectral imaging technology for pigment identification of colored relics

Heritage Science
Identifying pigments from colored relics is essential for their color restoration and for facsimile creation. A workflow for identifying pigment information is constructed based on visible spectral imaging technology, aligned with the drawing process of ...
Chun-ao Wei, Junfeng Li, Shiwei Liu
doaj   +2 more sources

Paul Delvaux: The Study of Nine Paintings by Non-Invasive Methods

Heritage, 2023
Paul Delvaux (1897–1994) was a Belgian Surrealist painter known for his dreamlike and enigmatic compositions. His works often featured nude or semi-nude women and deserted urban landscapes, evoking a sense of mystery and intrigue.
Edène Derzelle, David Strivay, Antoine Defeyt, Sarah-Jane Klein, Francisca Vandepitte, Catherine Defeyt   +5 more
doaj   +1 more source

An Introduction to the Electron Paramagnetic Resonance Spectral Library of Pigments

Heritage, 2022
A library cataloguing the electron paramagnetic resonance (EPR) spectra of artists’ pigments has been created. It contains spectral data collected using several spectrometers that operate at different frequencies for, currently, 51 pigments.
Olivia R. Kuzio, Joseph P. Hornak
doaj   +1 more source

Low-Cost Multispectral System Design for Pigment Analysis in Works of Art

Sensors, 2021
To better understand and preserve works of art, knowledge is needed about the pigments used to create the artwork. Various noninvasive techniques have been used previously to create pigment maps, such as combining X-ray fluorescence and hyperspectral ...
Tania Kleynhans, David W. Messinger, Roger L. Easton, John K. Delaney   +3 more
doaj   +1 more source

Review on Analysis Methods Enabled by Hyperspectral Imaging for Cultural Relic Conservation

Photonics, 2023
In this review, the conservation methods for various types of cultural relics enabled by hyperspectral imaging are summarized, and the hyperspectral cameras and techniques utilized in the process from data acquisition to analyzation are introduced ...
Zhongming Pei, Yong Mao Huang, Ting Zhou
doaj   +1 more source