Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Regina Sparrapan"'
Autor:
Wanderson Romão, Nicolas V Schwab, Maria Izabel M. S Bueno, Regina Sparrapan, Marcos N Eberlin, Andrea Martiny, Bruno D Sabino, Adriano O Maldaner
Publikováno v:
Química Nova, Vol 34, Iss 10, Pp 1717-1728 (2011)
In this review recent methods developed and applied to solve criminal occurences related to documentoscopy, ballistic and drugs of abuse are discussed. In documentoscopy, aging of ink writings, the sequence of line crossings and counterfeiting of doc
Externí odkaz:
https://doaj.org/article/4a2b53a6e7bd49d3871f13626c164a67
Autor:
Regina Sparrapan, Rodinei Augusti, José M. Riveros, Muftah M. Basher, Mario Benassi, Marcos N. Eberlin, Yuri E. Corilo
Publikováno v:
Journal of Mass Spectrometry. 47:1526-1535
Gas-phase reactions of model carbosulfonium ions (CH3-S+ = CH2; CH3CH2-S+ = CH2 and Ph-S+ = CH2) and an O-analogue carboxonium ion (CH3-O+ = CH2) with acyclic (isoprene, 1,3-butadiene, methyl vinyl ketone) and cyclic (1,3-cyclohexadiene, thiophene, f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39a231fdc56fcd317a3ef8c29ae49d23
https://doi.org/10.1002/jms.3109
https://doi.org/10.1002/jms.3109
Publikováno v:
Analytical Chemistry. 80:898-903
Using a cellulose dialysis membrane and aqueous solutions of common drugs as a proof-of-principle example, we demonstrate that solid but permeable and flexible membranes can be used as interfaces for the direct analysis of solution constituents via e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::baa53e4e93314c96c1098e6055bf6943
https://doi.org/10.1021/ac701960q
https://doi.org/10.1021/ac701960q
Autor:
Rodinei Augusti, José Roberto Guimarães, Regina Sparrapan, João Tito Borges, Marcos N. Eberlin
Publikováno v:
Journal of the Brazilian Chemical Society v.19 n.5 2008
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 19, Issue: 5, Pages: 950-955, Published: 2008
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 19, Issue: 5, Pages: 950-955, Published: 2008
Membrane introduction mass spectrometry (MIMS) was used to perform on-line monitoring of the chloroform formation via the chlorination of aqueous suspensions of several green and blue-green Brazilian algae (Microcystis panniformis, Selenastrum sp., S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40263de4eca26f0b11b9fef4f4df4baa
https://doi.org/10.1590/s0103-50532008000500021
https://doi.org/10.1590/s0103-50532008000500021
Publikováno v:
Journal of the American Society for Mass Spectrometry. 17:1014-1022
By Yates, Bouma, and Radom’s definition, distonic radical ions are those formally arising by ionization of diradicals or zwitterionic molecules (including ylides). These ions differ, therefore, from conventional radical ions by displaying the charg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24955a32b18c02328724ddf4b48f2352
https://doi.org/10.1016/j.jasms.2006.03.008
https://doi.org/10.1016/j.jasms.2006.03.008
Publikováno v:
Rapid Communications in Mass Spectrometry. 19:1775-1778
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e63e4717874db316b7121da1175f3d36
https://doi.org/10.1002/rcm.1980
https://doi.org/10.1002/rcm.1980
Autor:
Regina Sparrapan, Fabio Cesar Gozzo, Leonardo S. Santos, Marcos N. Eberlin, Ana Elisa Pinto Moreira Sorrilha, Rodinei Augusti
Publikováno v:
The Journal of Physical Chemistry A. 108:7009-7020
The gas-phase reactivity of a set of halocarbocations, +CH2X (X = Cl, Br, or I), +CHX1X2 (X1, X2 = F, Cl, or Br), and +CX3 (X = F or Cl), with four prototype aromatic compounds (benzene, furan, pyrrole, and pyridine) was investigated via double- and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::871e98556aec41c66d7023a62d957dba
https://doi.org/10.1021/jp0488822
https://doi.org/10.1021/jp0488822
Publikováno v:
Journal of Mass Spectrometry. 39:1176-1181
A direct MS/MS method for the ortho, meta or para configuration assignment of any single molecule that forms reference ions upon ionization and dissociation is demonstrated. Gas-phase structure diagnostic ion–molecule reactions with acetonitrile ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53a1c18632caf2d9475767e932838841
https://doi.org/10.1002/jms.704
https://doi.org/10.1002/jms.704
Publikováno v:
International Journal of Mass Spectrometry. 228:901-912
The mass-selected halocarbonyl cations FCO+, ClCO+, and BrCO+ were reacted with benzene, thiophene, pyrrole, and furan and a few of their alkyl derivatives to evaluate the ability of XCO+ ions to promote CH bond activation of aromatic compounds (M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fd0a944d5905d809f47748593ef39bb
https://doi.org/10.1016/s1387-3806(03)00239-2
https://doi.org/10.1016/s1387-3806(03)00239-2
Publikováno v:
Journal of the American Society for Mass Spectrometry. 12:14-22
Primary carboxonium (H2CO+–R) and carbosulfonium (H2CS+–R) ions (R = CH3, C2H5, Ph) and the prototype five-membered cyclic carboxonium ion are found to react in the gas phase with cyclic acetals and ketals by transacetalization to form the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3154d83c00041fa74c6e015881c91269
https://doi.org/10.1016/s1044-0305(00)00196-3
https://doi.org/10.1016/s1044-0305(00)00196-3