Results 1 to 10 of about 29,747 (161)

Gemology, Mineralogy, and Coloration Mechanism of Pinkish-Purple Cobaltoan Dolomite from the Democratic Republic of Congo

Crystals, 2022
A pinkish-purple cobaltoan dolomite from the Democratic Republic of Congo (DRC) has appeared on the Chinese gemstone market recently. In this study, Raman analysis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, electron probe micro ...
Ying Yan, Xiao-Yan Yu
doaj   +3 more sources

A mechanism for red coloration in vertebrates

Current Biology, 2022
Red coloration is a salient feature of the natural world. Many vertebrates produce red color by converting dietary yellow carotenoids into red ketocarotenoids via an unknown mechanism. Here, we show that two enzymes, cytochrome P450 2J19 (CYP2J19) and 3-hydroxybutyrate dehydrogenase 1-like (BDH1L), are sufficient to catalyze this conversion.
Toomey, Matthew B., Marques, Cristiana I., Araújo, Pedro M., Huang, Delai, Zhong, Siqiong, Liu, Yu, Schreiner, Gretchen D., Myers, Connie A., Pereira, Paulo, Afonso, Sandra, Andrade, Pedro, Gazda, Małgorzata A., Lopes, Ricardo J., Viegas, Ivan, Koch, Rebecca E., Haynes, Maureen E., Smith, Dustin J., Ogawa, Yohey, Murphy, Daniel, Kopec, Rachel E., Parichy, David M., Carneiro, Miguel, Corbo, Joseph C.   +22 more
exaly   +4 more sources

Relationship between the Coloration Mechanism and Gemological Properties of Purple Scapolite

Crystals, 2023
Purple scapolite is a precious gemstone. In this paper, we compared the crystal structure and spectral characteristics of purple scapolite before and after heat treatment with conventional gemological tests, EPMA, XRF, LA-ICP-MS, infrared spectroscopy ...
Yinghua Rao, Qingfeng Guo, Sixue Zhang, Libing Liao   +3 more
doaj   +3 more sources

SlSAM3 interacts with SlACS4 to facilitate brassinosteroid signaling-mediated tomato (Solanum lycopersicum) fruit coloring [PDF]

Communications Biology
Brassinosteroids (BRs) are among the plant hormones that regulate climacteric fruit ripening. However, the precise molecular mechanisms underlying this regulatory process remain poorly characterized.
Wu Xuetong, Li Ailing, Chen Huan, Liu Xingping, Weibiao Liao   +4 more
doaj   +2 more sources

A new understanding on the electrochemical coloration mechanism of titanium surface

Journal of Materials Research and Technology
Electrochemical coloration technology has been extensively studied for many years due to its effectiveness in enhancing the aesthetics, corrosion resistance, and biocompatibility of Ti materials.
Tengfei Yu, Yanpeng Xue, Man Zheng, Benli Luan   +3 more
doaj   +3 more sources

Identification of an R2R3-MYB gene regulating tepal background coloration in Tricyrtis sp. [PDF]

Scientific Reports
The liliaceous ornamental plant Tricyrtis sp. produces unique flowers, whose tepals have many random reddish-purple spots on a light purple background.
Yuta Shinoku, Ichiro Kazama, Yusuke Kanemaki, Mai Shibuya, Kakeru Inagawa, Julia Ono, Masaru Nakano, Masahiro Otani   +7 more
doaj   +2 more sources

Comparative Study of Gemological and Spectroscopic Features and Coloration Mechanism of Three Types of Spodumene

Crystals
Spodumene is a characteristic mineral in lithium-rich granitic pegmatites, serving both as a valuable mineral resource and an important gem material. This study incorporates three different color varieties of spodumene—pink to violet, yellow-green, and ...
Zijia Zhou, Jing Liu, Kui He, Biao Yang, Yinghua Rao   +4 more
doaj   +3 more sources

Structural color due to guided-mode resonance in silicon-on-insulator irradiated by nanosecond laser pulses [PDF]

Science and Technology of Advanced Materials
We demonstrate structural color generation in silicon-on-insulator wafers using nanosecond laser irradiation. Laser-induced periodic surface structures on the thin Si film act as grating couplers, enabling optical resonances that produce bright ...
Vygantas Mizeikis, Cristhian Cobas Montero, Anzelms Zukuls, Kaspars Ozols, Patrik Ščajev, Yoshishige Tsuchiya, Darius Gailevičius, Daniel Moraru, Pavels Onufrijevs   +8 more
doaj   +2 more sources

Microstructure and coloration mechanism of TC11 aerospace titanium alloy ultra-thin thermal oxide films

Journal of Materials Research and Technology
This study explores the microstructure and coloration mechanism of high-saturation structural colors in ultra-thin oxide films formed on TC11 aerospace titanium alloy near permissible engineering temperatures.
Xiangyu Gao, Zheng Zhang, Liyu Liu, Chunhu Tao   +3 more
doaj   +3 more sources

Recent Advancements in Natural Plant Colorants Used for Hair Dye Applications: A Review

Molecules, 2022
There is an on-going demand in recent years for safer and “greener” hair coloring agents with the global consumer awareness of the adverse effects of synthetic hair dyes.
Hongyan Cui, Wenjing Xie, Zhongjie Hua, Lihua Cao, Ziyi Xiong, Ying Tang, Zhiqin Yuan   +6 more
doaj   +1 more source