Advanced search

Loading...

Advanced search    

Search: authors:"Juris Meija"

19 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Left-handed DNA challenge

Juris Meija 0 ) Measurement Science and Standards, National Research Council Canada , 1200 Montreal Road, Ottawa, ON K1A 0R6 , Canada We would like to invite you to participate in the Analytical

Solution to papal chemistry challenge

Juris Meija 0 ) National Research Council Canada , 1200 Montreal Road, Ottawa , ON K1A 0R6, Canada - The papal chemistry challenge sought to find a lesser-known connection between pontiffs and

Papal chemistry challenge

Juris Meija 0 ) National Research Council Canada , 1200 Montreal Road, Ottawa , ON K1A 0R6, Canada We would like to invite you to participate in the Analytical Challenge, a series of puzzles to

Solution to peptide sequencing challenge

Juris Meija 0 0 The winner of the peptide sequencing challenge (published in volume 404, issue 4) is Sami T. Tuomivaara, Complex Carbohydrate Research Center, University of Georgia , Athens , USA

Solution to Plato’s elements challenge

Juris Meija 0 ) Institute for National Measurement Standards, National Research Council Canada , 1200 Montreal Road, Ottawa , ON K1R 0R6, Canada - Of all the writings of Plato, arguably none has

Solution to the beryllium valence challenge

Juris Meija 0 ) Institute for National Measurement Standards, National Research Council Canada , 1200 Montreal Road, Ottawa , ON K1A 0R6, Canada In both cases the amount of water is 90.0 g/18.0 g

The ultimate “analytical challenge”: what is analytical chemistry?

Juris Meija 0 ) Institute for National Measurement Standards, National Research Council Canada , 1200 Montreal Road M-12, Ottawa , ON K1A 0R6, Canada Analytical chemistry is the branch of chemistry

The Binomial Distribution of Hydrogen and Deuterium in Arsanes, Diarsanes, and Triarsanes Generated from As(Iii)/[BH n D4-n ]− and the Effect of Trace Amounts of Rh(Iii) Ions

Recent studies of the formation of arsane in the borohydride/arsenate reaction demonstrate the occurrence of condensation cascades whereby small quantities of di- and triarsanes are formed. In this study, the isotopic composition of these di- and triarsanes was examined using deuterium labelled borohydrides. A statistical model was employed to construct the mass spectra of all ...

Mass spectrometric separation and quantitation of overlapping isotopologues. Deuterium containing hydrides of As, Sb, Bi, Sn, and Ge

Mass spectra of fully and partially deuterated As, Sb, Bi, Ge, and Sn hydrides have been obtained using several mathematical approaches aimed at signal extraction and reconstruction. Study of such hydride mixtures is important for the elucidation of hydride generation mechanisms. In this approach, mass spectra of partially deuterated isotopomers, i.e., AsH2D and AsHD2, are ...

Mass spectrometric separation and quantitation of overlapping isotopologues. H2O/HOD/D2O and H2Se/HDSe/D2Se mixtures

Three conceptually different mathematical methods are presented for accurate mass spectrometric determination of H2O/HOD/D2O and H2Se/HDSe/D2Se concentrations from mixtures. These are alternating least-squares, weighted two-band target entropy minimization, and a statistical mass balance model. The otherwise nonmeasurable mass spectra of partially deuterated isotopologues (HOD and ...

Deconvolution of isobaric interferences in mass spectra

The concept of isobar deconvolution using the mass domain and signal intensity based domains is described. The intensity domain-based approach employs the reconstruction of the observed isotope pattern from the isolated patterns of the isobaric species. The quantitative information is adjusted with the use of the least squares algorithm. The mass domain-based approach employs ...

Interpretation of alkyl diselenide and selenosulfenate mass spectra

The mass spectral fragmentation of aliphatic diselenides and selenosulfenates is analyzed to gain a better understanding of the behavior of these species. The main fragmentation pathways of these species include the fragmentation along the Se-C bond, fragmentation along the Se-Se or Se-S bonds and intra-molecular rearrangements. In general, negative ionization favors the ...