Results 31 to 40 of about 10,248,234 (333)

Spectroscopic Characteristics and Color Origin of Red Tourmaline from Brazil

Journal of Spectroscopy, 2022
In the present paper, I report on the spectroscopic study for tourmaline color origin, performed red samples from Minas Geras State, Brazil, by gemological routine testing, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible ...
Ming Li
doaj   +1 more source

Spectroscopic characteristics of humates isolated from different soils

Soil and Water Research, 2011
Spectral characterisation of soil humic substances is one of the important methods for their quality identification. In this work, two optical methods (UV-VIS and SFS) were used.
Naděžda FASUROVÁ, Lubica POSPÍŠILOVÁ   +1 more
doaj   +1 more source

Near-Infrared MOSFIRE Spectra of Dusty Star-Forming Galaxies at 0.2 [PDF]

, 2017
We present near-infrared and optical spectroscopic observations of a sample of 450$\mu$m and 850$\mu$m-selected dusty star-forming galaxies (DSFGs) identified in a 400 arcmin$^2$ area in the COSMOS field.
Capak, P., Casey, C. M., Chen, C. -C., Cooray, A., Hung, C. -L., Kartaltepe, J., Killi, M., Sanders, D. B., Scoville, N. Z.   +8 more
core   +3 more sources

A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue [PDF]

, 2006
Aims: We study the optical spectral properties of a sample of stars showing far infrared colours similar to those of well-known planetary nebulae. The large majority of them were unidentified sources or poorly known in the literature at the time when ...
A. Manchado, A. Ulla, Acker, Allen, Bedijn, Beichman, Bobrowsky, Crowther, de Gregorio-Monsalvo, Dopita, Draine, García Lario, García-Lario, García-Lario, García-Lario, García-Lario, Habing, Hu, Jacoby, Jacoby, Kwok, M. Manteiga, Manchado, Manchado, Morgan, O. Suárez, Oudmaijer, Oudmaijer, P. García-Lario, Pickles, Pottasch, Preite-Martinez, Ratag, Riera, S. R. Pottasch, Scoville, Silva, van de Steene, van der Veen, van der Veen, van Hoof, van Winckel, Vassiliadis, Whitford   +43 more
core   +3 more sources

Mineral Compositions and Organic Color-Related Compounds of Freshwater Bead-Cultured Pearls from Zhuji, Southeast China: Insights from Multi-Spectroscopic Analyses

Crystals
Freshwater bead-cultured pearls (FWBCPs) from Zhuji, China, have gained significant market prominence due to their large size, unique pearl luster, and diverse color.
Xi Li, Xiao-Yan Yu, Cun Zhang
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Spectroscopic survey of the Galaxy with Gaia I. Design and performance of the Radial Velocity Spectrometer [PDF]

, 2004
The definition and optimisation studies for the Gaia satellite spectrograph, the Radial Velocity Spectrometer (RVS), converged in late 2002 with the adoption of the instrument baseline. This paper reviews the characteristics of the selected configuration
Arenou, F., Baylac, M. O., Bertelli, G., Bijaoui, A., Bingham, R., Bono, G., Boschi, F., Castelli, F., Chemla, F., Coker, J., Crifo, F., Cropper, M., David, M., Dibbens, T., Gomboc, A., Gomez, A., Hancock, B., Haywood, M., Helmi, A., Holland, A., Horville, D., Huet, J. M., Jauregi, U., Katz, D., Laporte, P., Lebreton, Y., Marrese, P., Melse, T., Mignot, S., Morin, D., Munari, U., Perryman, M., Prsa, A., Royer, F., Sayede, F., Sellier, A., Siviero, A., Sordo, R., Soubiran, C., Stevenson, T. J., Thevenin, F., Tomasella, L., Turon, C., Vallenari, A., Viala, Y., Vola, P., Walton, D., Wilkinson, M., Winter, B., Zwitter, T.   +49 more
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The Influence of Green Manure Planting on the Spectroscopic Characteristics of Dissolved Organic Matter in Freshwater-Leached Saline–Alkali Soil at Different Depths

Agronomy
This study investigated the influence of green manure planting on the spectroscopic properties of dissolved organic matter (DOM) in saline–alkali soil under freshwater leaching conditions at different soil depths.
Yuhao Wang, Chengjie Yin, Jingkuan Wang, Xiaohui Ji, Xinwei Liu   +4 more
doaj   +1 more source

A spectroscopic analysis of the chemically peculiar star HD207561

, 2012
In this paper we present a high-resolution spectroscopic analysis of the chemically peculiar star HD207561. During a survey programme to search for new roAp stars in the Northern hemisphere, Joshi et al.
Abt, Ashoka, Asplund, B. N. Ashoka, Balmforth, Bertaud, Bigot, Bigot, Chountonov, Christensen-Dalsgaard, Cowley, Crawford, Cunha, D. L. Mary, E. Semenko, Flower, Girish, González, Hatzes, Hauck, Joshi, Joshi, Joshi, Kochukhov, Kochukhov, Kudryavtsev, Kunzli, Kupka, Kurtz, Kurtz, Kurtz, Kurtz, Kurtz, Kurucz, Lucke, M. Sachkov, Martinez, Moon, Munari, N. K. Chakradhari, Napiwotzki, Nicolet, Olsen, P. Martinez, Panchuk, Piskunov, Piskunov, Romanyuk, Ryabchikov, S. Joshi, S. Seetha, Smalley, Smalley, Turcotte, V. Girish, van Leeuwen, Vauclair, Wade, Y. C. Joshi   +58 more
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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   +1 more source

In vitro electrochemical corrosion and cell viability studies on nickel-free stainless steel orthopedic implants. [PDF]

PLoS ONE, 2013
The corrosion and cell viability behaviors of nanostructured, nickel-free stainless steel implants were studied and compared with AISI 316L. The electrochemical studies were conducted by potentiodynamic polarization and electrochemical impedance ...
Erfan Salahinejad, Mohammad Jafar Hadianfard, Digby Donald Macdonald, Samin Sharifi-Asl, Masoud Mozafari, Kenneth J Walker, Armin Tahmasbi Rad, Sundararajan V Madihally, Lobat Tayebi   +8 more
doaj   +1 more source