Mid infrared
Strategy for high-accuracy-and-precision retrieval of atmospheric methane from the mid-infrared FTIR network
... Ground-based solar FTIR measurements of methane have the potential to contribute to trend studies as well as quantifi- cation of sources and sinks. The latter can be two comple- mentary tasks: (i) validation of satellite ...
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Aplication of genetic algorithms in the variable selection in mid infrared spectroscopy: simultaneous determination of glucose, maltose and fructose.
... APLICATION OF GENETIC ALGORITHMS IN THE VARIABLE SELECTION IN MID INFRARED SPECTROSCOPY. SIMULTANEOUS DETERMINATION OF GLUCOSE, MALTOSE AND FRUCTOSE. Genetic algorithm was used for variable selection in ...
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Determination of biodiesel percentage in biodiesel: diesel mixtures using mid-infrared spectroscopy.
... DETERMINATION OF BIODIESEL PERCENTAGE IN BIODIESEL:DIESEL MIXTURES USING MID-INFRARED SPECTROSCOPY. Considered the best substitute for diesel, biodiesel can be blended with diesel in any ratio, bringing ...
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Mid-infrared spectroscopy and sensory analysis applied to detection of adulteration in roasted coffee by addition of coffee husks.
... MID-INFRARED SPECTROSCOPY AND SENSORY ANALYSIS APPLIED TO DETECTION OF ADULTERATION IN ROASTED COFFEE BY ADDITION OF COFFEE HUSKS. Mid-infrared spectroscopy and chemometrics were used to ...
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Electronic bands structure and gap in mid-infrared detector InAs/GaSb type II nanostructure superlattice
... The idea of the type II InAs/GaSb superlattice (T2SL) was firstly suggested by Sai-Halasz and coworkers in 1977 [1]. The application of such (SL), only after several years, was proposed as an infrared sensing ...
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Teaching experiment of chemometrics for exploratory analysis of edible vegetable oils by mid infrared spectroscopy and principal component analysis: a tutorial, part I.
... Química espalhados pelo Brasil, e até mesmo alguns cursos técnicos, possuem em seus currículos a utilização da técnica de espectrosco- pia no infravermelho médio com transformada de Fourier (Fourier Transform ...
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Near and mid infrared optical sensors.
... Muitos métodos espectrofotométricos com detecção nas regiões do infravermelho próximo e médio empregam fibras ópticas, sendo baseados nas propriedades intrínsecas do analito. Esta abordagem do problema analítico é muito ...
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Mid-infrared spectroscopic screening of metabolic alterations in stress-exposed gilthead seabream (Sparus aurata)
... Feature selection and k-nearest neighbour classification analysis. In order to assess if the spec- tral features suggested to be responsible for the separation between the groups in the score plots generated by the ...
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Quím. Nova vol.33 número5
... Brazil is one of the largest producers and consumers of charcoal in the world. About 50% of its charcoal comes from native forests, with a large part coming from unsustainable operations. The anatomic identiication of ...
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J. Braz. Chem. Soc. vol.22 número8
... chemical and physical sensors represent an emerging technology which can be important for the identiication and quantiication of harmful compounds. Their use is still not fully developed, requiring basic research to ...
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Quím. Nova vol.40 número4
... purpose, mid infrared spectroscopy (MIR) was used to calculate the monomers’ degree of conversion (%DC); as well as simultaneous Thermogravimetric Analysis – Differential Thermal Analysis (TGA-DTA) and ...
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J. Braz. Chem. Soc. vol.26 número4
... to mid-infrared (MIR) spectroscopy as an analytical method for simultaneous classification of biodiesels from different oils (soybean and used frying oil) and routes (methylic and ...
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Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
... near infrared spectra of (a) herderite, (b) hydroxylherde- rite-SAA073, intensity has been multiplied a factor of 2, (c) hydrox- ylherderite-SAA074, intensity has been multiplied a factor of 4, (d) ...
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Interannual variations of early winter Antarctic polar stratospheric cloud formation and nitric acid observed by CALIOP and MLS
... Figure 6. Intercomparison of the sensitivity of various PSC detec- tion techniques to a range of NAT number densities and effective radii at a temperature of T − T ICE = 5 K, for an ambient pressure of 46 hPa, 5 ppmv H 2 ...
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Technical Note: New trends in column-integrated atmospheric water vapor – Method to harmonize and match long-term records from the FTIR network to radiosonde characteristics
... ground-based, mid-infrared solar FTIR spectrometry based upon a Tikhonov approach constraining the derivative (with respect to height) of the retrieved water profiles given in units of per cent differences ...
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REPOSITORIO INSTITUCIONAL DA UFOP: Assessment of the molecular structure of natrodufrénite – NaFe^2+Fe^3+(PO4)4(OH)6.2(H2O), a secondary pegmatite phosphate mineral from Minas Gerais, Brazil.
... The infrared spectrum of natrodufrénite is displayed in ...Some infrared spectra of dufrénite may be found in some data bases but the data is not readily ...
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Seismic structure of the lithosphere and upper mantle beneath the ocean islands near mid-oceanic ridges
... ward into the mantle along the trenches by the process of subduction. In a broader perspective, the thermal contrac- tion of lithosphere created at the ridge also defines the shape of the mid-oceanic ridge ...
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On the importance of paleoclimate modelling for improving predictions of future climate change
... As observational evidence tends to become more sparse and uncertain at more distant times, much effort has been focussed on more recent paleo-climates such as the mid- Holocene (6 ka BP) and Last Glacial Maximum ...
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Rev. bras. ortop. vol.52 número4
... Fig. 6 shows that for both global and regional analyses, the proportion of surgical recommendation was much lower in group 1, as expected. Cases from group 2 received more sur- gical indications than those of group 3 in ...
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Infrared and Raman spectroscopic characterization of the borate mineral hydroboracite CaMg[B3O
... Crystals of hydroboracite were placed on a polished metal sur- face on the stage of an Olympus BHSM microscope, which is equipped with 10, 20, and 50 objectives. The microscope is part of a Renishaw 1000 Raman ...
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