Crystal-chemical and structural characterization of fluorapatites in ejecta from Somma-Vesuvius volcanic complex

2011 ◽  
Vol 96 (11-12) ◽  
pp. 1828-1837 ◽  
Author(s):  
M. Rossi ◽  
M. R. Ghiara ◽  
G. Chita ◽  
F. Capitelli
Keyword(s):  
Structural Characterization ◽  
Volcanic Complex ◽  
Crystal Chemical

Crystal chemical and structural characterization of an Mg-rich osumilite from Vesuvius volcano (Italy)

2008 ◽  
Vol 20 (5) ◽  
pp. 713-720 ◽  
Author(s):  
Giuseppina Balassone ◽  
Angela Mormone ◽  
Manuela Rossi ◽  
Alessandro Bernardi ◽  
Martin Fisch ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Crystal Chemical ◽  
Vesuvius Volcano

scholarly journals Crystal Chemical and Structural Characterization of Natural and Cation-Exchanged Mexican Erionite

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 772
Author(s):  
Karla Quiroz-Estrada ◽  
Alessandro Pacella ◽  
Paolo Ballirano ◽  
Miguel Ángel Hernández-Espinosa ◽  
Carlos Felipe ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Structural Characterization ◽  
Exchange Process ◽  
Rietveld Analysis ◽  
Crystal Chemical ◽  
Ion Exchange Process ◽  
Pristine Sample ◽  
Similar Range ◽  
Type Zeolite

In this work, the chemical structural characterization of the erionite-type zeolite from Agua Prieta, Sonora, México, was performed on both pristine and Na, Ca, and Mg exchanged samples in order to identify the various modifications due to cation exchange. The samples investigated were those that showed the best behaviour of CO2 and CH4 adsorption at zero coverage levels and the higher values of surface area reported in our previous studies. According to the crystal-chemical formula (Na3.44K1.96Mg0.63Ca0.62)[Al8.21Si27.79O71.85]·29.63H2O, the pristine sample has been classified as erionite-Na. Morphological FE-SEM investigation performed on both pristine (ERIN) and Na-exchanged samples (ERINa3) showed a similar range of fiber diameters (27–37 nm). The chemical analyses of the ion-exchanged samples evidenced the upload of Ca and Mg following ion exchange with Na. Rietveld analysis results allowed the identification of the chemical structural modification caused by the ion exchange process, occurring mainly at the Ca1 site.

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

Structural characterization of the PPIase domain of FKBP51, a cochaperone of human Hsp90

2011 ◽  
Vol 44 (06) ◽  
Author(s):  
A Bracher ◽  
C Kozany ◽  
AK Thost ◽  
F Hausch
Keyword(s):  
Structural Characterization ◽  
Ppiase Domain

Structural characterization of dendrobine-type sesquiterpene alkaloids from the stems of Dendrobium nobile using LC-MS/MS

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
YH Wang ◽  
B Avula ◽  
N Abe ◽  
F Wei ◽  
M Wang ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Dendrobium Nobile
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