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A contribution to the physicochemical characterization of nonstoichiometric salts of tungstosilicic acid
(Elsevier Science, 2007-06)
Nonstoichiometric cesium and rubidium salts of tungstosilicic acid (TSA) were synthesized by precipitation. These solids are insoluble in water, due to the low solvation energy of large cations, have high specific surface ...
Systematics, taxonomy and domestication of alpaca and llama: new chromosomal and molecular evidence
(2007)
Four camelid species exist in South America: two wild, the guanaco (Lama guanicoe) and the vicuna (Victigna vicugna), and two domestic, the alpaca (Lama pacos) and the llama (Lama glama). However, the origin of the domestic ...
A high performance 650-GHz sideband separating mixer design and results
(IEEE Inst Electrical and Electronic Engineering Inc., 2017)
We presented the design and experimental results of a new sideband-separating (2SB) mixer for 600-720 GHz (ALMA Band 9). Although designed following the classical quadrature hybrid architecture, the emphasis of the ...
Continuum, Discrete, and Explicit Solvation Models for Describing the Low-Lying Absorption Spectrum of the Pterin Acid in Aqueous Environment
(JOHN WILEY & SONS INC, 2010)
The absorption spectrum of the acid form of pterin in water was investigated theoretically. Different procedures using continuum, discrete, and explicit models were used to include the solvation effect on the absorption ...
A NEW DIAGNOSTIC OF THE RADIAL DENSITY STRUCTURE OF Be DISKS
(IOP PUBLISHING LTD, 2011)
We analyze the intrinsic polarization of two classical Be stars in the process of losing their circumstellar disks via a Be to normal B star transition originally reported by Wisniewski et al. During each of five polarimetric ...
Spectral detection of stress-related pigments in salt-lake succulent halophytic shrubs
(Elsevier, 2016-10)
The spectral detection of vegetation pigment concentrations has a high potential value, but it is still underdeveloped, especially for pigments other than chlorophylls. In this study, the seasonal pigment dynamics of two ...
Crystal structure determination of karibibite, an Fe3+ arsenite, using electron diffraction tomography
(Mineralogical Soc, 2017-10)
The crystal structure of karibibite, Fe3+3 (As3+O2)4(As3+2 O5)(OH), from the Urucum mine (Minas Gerais, Brazil), was solved and refined from electron diffraction tomography data [R1 = 18.8% for F > 4σ(F)] and further ...
Single tuned algorithm to estimate the SPM concentration in a cascade reservoir system using OLI/L8 images
(2020-12-01)
Suspended particulate matter (SPM) affecting light propagation in the water column, which, in turn, affects primary production, is considered an important water quality indicator. Monitoring SPM in cascading reservoir ...
Global interannual trends and amplitude modulations of the sea surface height anomaly from the TOPEX/Jason-1 altimeters
(AMER METEOROLOGICAL SOC, 2008)
This study uses the global Ocean Topography Experiment (TOPEX)/Jason-1 altimeters` time series to estimate the 13-yr trend in sea surface height anomaly. These trends are estimated at each grid point by two methods: one ...
Digital signal processing of acoustic emission signals using power spectral density and counts statistic applied to single-point dressing operation
(Inst Engineering Technology-iet, 2017-08-01)
Dressing is an important operation for the grinding process. Its goal is to recondition the wheel tool to re-establish its cutting characteristics, owing to the wear produced after successive passes. Monitoring systems ...