Top PDF Desarrollo de un sistema de gestión de la calidad aplicando la norma ISO 9001:2008 en la empresa Sobres del Ecuador.
Airborne observations of formic acid using a chemical ionization mass spectrometer
... photochemistry of formic acid. A vertical profile of formic acid from 800 to 2300 m is shown in ...concentration of 313 pptv and then falling off with increasing ...
Detection of formaldehyde emissions from an industrial zone in the Yangtze River Delta region of China using a proton transfer reaction ion-drift chemical ionization mass spectrometer
... campus of the Nanjing University of Information Sci- ence and Technology ...description of the site (32 ◦ 12 ′ ...middle of two highways, ...east of the site, ...
Constraining the sensitivity of iodide adduct chemical ionization mass spectrometry to multifunctional organic molecules using the collision limit and thermodynamic stability of iodide ion adducts
... total mass load- ings of all molecular components with the submicron or- ganic aerosol mass concentrations measured by an aerosol mass spectrometer (AMS) (DeCarlo et ...majority ...
A switchable reagent ion high resolution time-of-flight chemical ionization mass spectrometer for real-time measurement of gas phase oxidized species: characterization from the 2013 Southern Oxidant and Aerosol Study
... many of these compounds as possible will provide quantitative, spe- ciated data to modelers; it should be acknowledged that knowing the temporal behavior without quantification is also of ...case of ...
Caracterização mineralógica de solos tropicais por sensoriamento remoto hiperespectral.
... Effects of band positioning and bandwidth on NDVI measurements of tropical ...Sensing of Environment, New York, ...Relationships of spectral reflectance and color among near- and sub-surface ...
Kinetics and mechanism of the reaction of gold(III) chloride complexes with formic acid
... analysis of literature data [21, 22] it can be suggested that the change of acidity of the solution can affect the kinetics and mechanism of the gold(III) reaction reduction, leading under ...
Análise multirresíduos de pesticidas em tomate utilizando LC-MS/MS e avaliação dos...
... Determination of pesticides in apple-based infant foods using liquid chromatography electrospray ionization tandem mass spectrometry. Journal of Agricultural and Food Chemistry,[r] ...
Quím. Nova vol.31 número3
... automated using Prospekt-2 system and the method developed consisted of the following steps: the cartridge was solvated with 1 mL of methanol at 5 mL/min and equilibrated with 1 mL of water at ...
Emprego da regressão linear simples na análise de mistura espectral
... characteristic of the spectrum form and its quantity. In the case of hyperspectral images analysis the studies are focused on the features of diagnostic absorption of the ...spectral of ...
Bisulfate – cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (< 100 ppqV) detection of atmospheric dimethyl amine: proof-of-concept and first ambient data from boreal forest
... Example mass spectra from (a) DMA/EA, (b) ammonia, (c) TMA/PA and (d) a C4- amine ...presence of TMA/PA with concentrations larger than a few tens or hun- dreds of ...exact mass determination ...
A compact PTR-ToF-MS instrument for airborne measurements of volatile organic compounds at high spatiotemporal resolution
... Hz) using a mass spectrometer ...form of proton-transfer- reaction mass spectrometry (PTR-MS) (Crutzen et ...variety of research aircraft, and the reader is referred to the ...
Mat. Res. vol.16 número6
... inluence of different chemical blowing agents (CBA), one endothermic and one exothermic, at the same concentration (2% by mass), on poly(acid lactic), PLA ...different chemical blowing ...
Diurnal variations of residential particulate wood burning emissions and their contribution to the concentration of Polycyclic Aromatic Hydrocarbons (PAHs)
... confirming that there are still many reasons to assume that wood combustion particles play a relevant role for indoor as well as outdoor particle exposure in areas where such combustion processes are relevant. As other ...
On line pre-concentration for simultaneous determination of low molecular weight organic acids and inorganic anions in Amazonian river water samples employing ion chromatography with conductivity detection
... analysis of inorganic anions and low molecular weight organic acids in complex matrices using potassium hydroxide gradient ...consisted of testing the effects of the sample volume in the ...
Discrimination of beer flavours by analysis of volatiles using the mass spectrometer as an electronic nose
... 96% of the data variability is described by five principal ...Projection of the beer samples onto the plane defined by the first two PCs, which explain 90% of the variance, did not reveal any ...
Mat. Res. vol.15 número6
... degree of surface coverage, k is the equilibrium constant of the adsorption process and C is the inhibitor ...plots of C/θ versus C for mild steel corrosion in 20% formic acid for the ...
J. Braz. Chem. Soc. vol.28 número3
... specificity of analytical methods. Furthermore, the possibility of different spectrum acquisition modes allows the enhancement of specificity and sensitivity of the ...m/z of the ...
Screening of Non- Saccharomyces cerevisiae Strains for Tolerance to Formic Acid in Bioethanol Fermentation.
... Screening of yeast strains for stress and inhibitor tolerance is an important step in lignocel- lulosic bioethanol ...utilization of only spot plate analysis for the identification of tolerance ...
J. Braz. Chem. Soc. vol.18 número5
... solubilization of the extract from ...process of the extract using a Sepack-C 18 cartridge is necessary to retain these compounds that are not nucleosides, and also confirm the less polar ...
MEDIÇÕES DE VAPOR DE ÁGUA ATMOSFÉRICO E DA PRESSÃO DE SUPERFÍCIE A PARTIR DE IMAGENS DO SENSOR AVIRIS E SUA RELAÇÃO COM A TOPOGRAFIA NO COMPLEXO DE NIQUELÂNDIA Osmar Abílio de Carvalho Júnior1 ; Ana Paula Ferreira de Carvalho2 ; Renato Fontes Guimarães
... distribution of water vapor and surface ...images using linear regression. The condition of clear sky, without cloud cover, favored a high correlation between the DTM and the atmospheric ...