Results 21 to 30 of about 2,087,234 (343)

The Spectral Characteristics and Identification Techniques for Colorless and Near-colorless HPHT Synthetic Diamonds

Yankuang ceshi, 2016
Melee-sized colorless HPHT synthetic diamonds mixed with natural diamonds in jewellery have been reported by gem testing laboratory. It was noted that the differences of the fluorescence and phosphorescence between natural and synthetic diamonds are the ...
SONG Zhong-hua, LU Tai-jin, SU Jun, GAO Bo, TANG Shi, HU Ning, KE Jie, ZHANG Jun   +7 more
doaj   +1 more source

Biodiesel and Bioplastic Production from Waste-Cooking-Oil Transesterification: An Environmentally Friendly Approach

Energies, 2022
Alternative sources of fuel have been a concern in the last few decades. The growth of urbanization and industrialization will lead to the exhaustion of fossil fuels, attracting studies on alternative routes.
Cristina Almeida da Silva, Raíssa Nunes dos Santos, Geiser Gabriel Oliveira, Talita Pereira de Souza Ferreira, Nelson Luis Gonçalves Dias de Souza, Aline Souza Soares, Joece Ferreira de Melo, Carla Jovania Gomes Colares, Ueric José Borges de Souza, Renisson Neponuceno de Araújo-Filho, Raimundo Wagner de Souza Aguiar, Gil Rodrigues dos Santos, Evgeni Evgeniev Gabev, Fabrício Souza Campos   +13 more
doaj   +1 more source

Two devices facilitating spectrometry in the far infrared [PDF]

, 1927
In spectrometric investigations in the infrared two principal difficulties are the extremely small energy available in the long waves, and the relatively great intensity of the near infrared.
Badger, Richard M.
core   +1 more source

Thermal Stability of Azurite and Malachite in Relation to the Formation of Mediaeval Glass and Glazes [PDF]

, 2002
Azurite and malachite have been extensively used as pigments in ancient and medieval manuscripts, glasses and glazes. The thermal stability of naturally occurring azurite and malachite was determined using a combination of controlled rate thermal ...
Ding, Zhe, Frost, Raymond, Kloprogge, Jacob, Martens, Wayde   +3 more
core   +2 more sources

Wavelength-scale stationary-wave integrated Fourier-transform spectrometry [PDF]

, 2007
Spectrometry is a general physical-analysis approach for investigating light-matter interactions. However, the complex designs of existing spectrometers render them resistant to simplification and miniaturization, both of which are vital for applications
A Bruyant, A Labeyrie, Alain Morand, AM Kadin, D Gabor, D Knipp, Etienne le Coarer, G Lippmann, G Lippmann, G Sagnac, Gilles Lérondel, Grégory Leblond, GW Stroke, HE Ives, I Stefanon, Ilan Stefanon, J Bland-Hawthorn, Jean Marc Fedeli, M Froggatt, ML Junttila, P Connes, Pascal Royer, Pierre Benech, Pierre Kern, RF Wolffenbuttel, RG Lyons, S Rommeluere, Sylvain Blaize, YN Denisyuk   +28 more
core   +4 more sources

Study on the Infrared Spectral Characteristics of H2OⅠ-type Emerald and the Controlling Factors

Yankuang ceshi, 2019
BACKGROUND The infrared absorption mechanism is mainly related to the Si-O lattice, channel structure water, other alkaline metal cations, and vibration of molecules.
QIAO Xin, ZHOU Zheng-yu, NONG Pei-zhen, LAI Meng, LI Ying-bo, GUO Kai-peng, ZHONG Qian, WANG Han, ZHOU Yan   +8 more
doaj   +1 more source

Physicochemical Characterization of Biopolymer Chitosan Extracted from Shrimp Shells [PDF]

علوم و تکنولوژی پلیمر, 2015
Chitosan is a deacetylated derivative of chitin, which is a naturally abundant mucopolysaccharide, supporting the matter of crustaceans, insects, and fungi.
Nezamaddin Mengelizadeh, Nematollah Jafarzadeh Haghighifard, Afshin Takdastan, Mina Hormozinejad   +3 more
doaj   +1 more source

Identification of Synthetic Cannabinoid New Psychoactive Substances 4F-MDMB-BUTINACA and MDMB-4en-PINACA [PDF]

Fayixue Zazhi, 2021
Objective To establish a method that combines a series of techniques including Fourier transform infrared spectrum （FTIR）, gas chromatography-mass spectrometry （GC-MS）, high resolution mass spectrometry and nuclear magnetic resonance spectroscopy （NMR ...
WANG Kua-dou, YUAN Xiao-liang, ZHANG Yu-rong, et al.
doaj   +1 more source

Multispectral images of peach related to firmness and maturity at harvest [PDF]

, 2009
wo multispectral maturity classifications for red soft-flesh peaches (‘Kingcrest’, ‘Rubyrich’ and ‘Richlady’ n = 260) are proposed and compared based on R (red) and R/IR (red divided by infrared) images obtained with a three CCD camera (800 nm, 675 nm ...
A. Herrero, Aleixos, Aleixos, Carlomagno, Delwiche, Diaz, Diaz, Diezma-Iglesias, Du, Ferrer, García-Ramos, Gómez-Sanchís, Jahns, Kleynen, Kondo, L. Lleó, Laykin, Leemans, Leemans, Lu, Lu, M. Ruiz-Altisent, McGlone, Mehl, Merzlyak, P. Barreiro, Peng, Qing, Ruiz-Altisent, Singh, Tao, Unay, Vila, Ward, Zheng, Zude   +35 more
core   +3 more sources

Imputation of missing milk Fourier transform mid-infrared spectra using existing milk spectral databases: A strategy to improve the reliability of breeding values and predictive models

Journal of Dairy Science, 2023
: The use of milk Fourier transform mid-infrared (FT-MIR) spectrometry to develop management and breeding tools for dairy farmers and industry is growing and supported by the availability of numerous new predicted phenotypes to assess the nutritional ...
H. Soyeurt, X.-L. Wu, C. Grelet, M.L. van Pelt, N. Gengler, F. Dehareng, C. Bertozzi, J. Burchard   +7 more
doaj   +1 more source