نتایج جستجو برای: elemental analysis

تعداد نتایج: 2836297  

2005
Asgar Kayan

The effect of the solvent butanol on the complexation reaction of allylacetoacetate (AAA) with titanium tetraethoxide. (Ti(OEt)4) in molar ratio Ti(OEt)4:AAA = 1:1 was investigated by C-NMR, FT-IR spectroscopy and elemental analysis. The investigation shows that some ethoxy groups that are attached to the titanium are substituted with butoxy groups. The hydrolytic stability of the allylacetoace...

2013
Agim Shabani

New complexes of nickel (II) have been synthesized in the reaction mixture of nickel (II) acetate and 4-hydroxy-2-oxo-2Hchromene-3-carboxamide. Bis(4-hydroxy-2-oxo-2H-chromene-3carboxamidato-O,O)nickel (II) and diaquabis(4-hydroxy-2-oxo-2Hchromene-3-carboxamidato-O,O)nickel (II) were characterized by elemental analysis, IR spectroscopy and ESI mass spectrometry. Elemental analysis and mass spec...

2012
ANNA ZWOŹDZIAK KRYSTYNA TRZEPLA-NABAGLO MARIA SKRĘTOWICZ JERZY ZWOŹDZIAK

Ambient PM2.5 aerosol samples were collected from Wroclaw residential area between January and April 2009, and their elemental compositions were studied. The mean mass concentration of PM2.5 was 36±21 μg/m. Based on the variability in elemental composition of atmospheric aerosols, using principal component analysis (PCA) and multiple linear regression (MLRA), four main sources of fine particula...

2005

The Agilent 7500ce ICP-MS is shown to be an excellent analytical tool for the elemental analysis of gasoline. It offers the best detection limits of any multi-element technique and a full elemental analysis suite that takes less than 5 minutes to acquire. The Octopole Reaction System (ORS), integral to the 7500ce, ensures that a single method and set of conditions can be used to directly determ...

2014

The specific elemental composition of industrial glass products influences several of its physical properties, such as heat and shock resistance, transparency, and chemical reactivity. Chemical analysis of glass samples is therefore required to support both R&D and production operations. Unfortunately, full elemental analysis of glass by a method like ICP-OES requires digestion with hazardous a...

2012
Tomoko Suzuki Hideki Hashimoto Hiromichi Ishihara Nobuyuki Matsumoto Hitoshi Kunoh Jun Takada

Two morphologically distinct extracellular stalk fibers produced by Gallionella ferruginea were compared by electron microscopy and elemental analysis. The thick- and fine-fiber stalks were different in structure on a micrometer scale and in the site on the mother cell to which they were attached, but on a nanometer scale they were similar in ultrastructure and in the elemental composition of t...

Journal: :The Journal of Cell Biology 1981
A J Saubermann P Echlin P D Peters R Beeuwkes

X-ray microanalysis of frozen-hydrated tissue sections permits direct quantitative analysis of diffusible elements in defined cellular compartments. Because the sections are hydrated, elemental concentrations can be defined as wet-weight mass fractions. Use of these techniques should also permit determination of water fraction in cellular compartments. Reliable preparative techniques provide fl...

2011
P. S. Chhabra N. L. Ng M. R. Canagaratna A. L. Corrigan L. M. Russell D. R. Worsnop R. C. Flagan

Recently, graphical representations of aerosol mass spectrometer (AMS) spectra and elemental composition have been developed to explain the oxidative and aging processes of secondary organic aerosol (SOA). It has been shown previously that oxygenated organic aerosol (OOA) components from ambient and laboratory data fall within a triangular region in the f44 vs. f43 space, where f44 and f43 are ...

2016
Atis Chandra Mandal

Energy Dispersive X-Ray Fluorescence (EDXRF) technique has been used to study two Rupee Indian coins minted during the period 1993 to 2010 for their elemental concentrations. From the analysis of the coins, it is found that the coins are made of binary alloy and it was observed that from 2005 onwards, the composition of the coins has been changed from Cupro-Nickel to Ferritic Stainless Steel (F...

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