scholarly journals Structural characterization of eutectic aqueous NaCl solutions under variable temperature and pressure conditions

2015 ◽  
Vol 17 (21) ◽  
pp. 14054-14063 ◽  
Author(s):  
A.-A. Ludl ◽  
L. E. Bove ◽  
A. M. Saitta ◽  
M. Salanne ◽  
T. C. Hansen ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Variable Temperature ◽  
Structural Evolution ◽  
Temperature And Pressure

We analyze the structural evolution of quenched aqueous NaCl solutions under pressure up to 4 GPa.

Synrift evaporite deposition and structural characterization of the onshore Alagoas subbasin

2019 ◽  
Vol 7 (4) ◽  
pp. SH19-SH31
Author(s):  
Gabriela Salomão Martins ◽  
Webster Ueipass Mohriak ◽  
Nivaldo Destro
Keyword(s):  
Structural Characterization ◽  
Oil And Gas ◽  
Hanging Wall ◽  
Structural Evolution ◽  
Gas Production ◽  
North East ◽  
The North ◽  
Half Graben ◽  
Well Data

The Sergipe-Alagoas Basin, situated in the north-east Brazilian margin, has a long tradition of oil and gas production and the presence and distribution of evaporites play an important role in petroleum systems in the basin. However, little research has focused on the structural evolution of the older, synrift evaporitic sections of the basin. We have focused explicitly in the detailed subsurface structural characterization of the rift in the Alagoas subbasin and the distribution of the Early Aptian evaporites. To accomplish this objective, we interpreted selected 2D and 3D seismic and well data located in two areas known as the Varela Low (VL) and Fazenda Guindaste Low (FGL). We identified diverse deformation styles in those two basin depocenters. Our interpretation indicates that VL consists of a half-graben with a significant rollover structure, controlled by two listric northeast–southwest border faults. The deformation in the hanging wall is also accommodated by release faults and minor antithetic faults. In this depocenter, we mapped in the seismic and the well data an older evaporitic sequence within the Coqueiro Seco Fm., known as Horizonte Salt. This evaporitic section occurs in the internal part of the VL half graben, where it is limited by release and antithetic faults. Significant salt strata growing toward the antithetic fault is observed. Whereas, the FGL represents a graben elongated along the north-east direction and is controlled by several types of structures. We recognized normal synthetic and antithetic faults, transfer zones, release faults, and rollover anticlines in the seismic throughout this depocenter. We mapped an evaporitic section within the Maceió Fm., known as Paripueira Salt, which consists of disconnected salt bodies, restricted to the hanging walls of synrift faults.

Structural characterization of polyallene in the solid state as studied by variable-temperature high-resolution carbon-13 NMR spectroscopy

1991 ◽  
Vol 24 (8) ◽  
pp. 2011-2014 ◽  
Author(s):  
Kyung Hoon Min ◽  
Hiromichi Kurosu ◽  
Isao Ando ◽  
Takakazu Yamamoto ◽  
Takaki Kanbara
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
Structural Characterization ◽  
Variable Temperature

Structural characterization of temperature- and pressure-induced inverse↔normal spinel transformation in magnetite

2007 ◽  
Vol 75 (2) ◽  
Author(s):  
G. Kh. Rozenberg ◽  
Y. Amiel ◽  
W. M. Xu ◽  
M. P. Pasternak ◽  
R. Jeanloz ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Normal Spinel ◽  
Temperature And Pressure

Synthesis and Structural Characterization of N-[4-(2-Hydroxyethyl)-1,2,4-oxathiazinan-3-ylidene]-benzamide and its Mercury(II) Chloride Adduct

2005 ◽  
Vol 60 (9) ◽  
pp. 945-950 ◽  
Author(s):  
Jorge R. Angulo-Cornejo ◽  
Ketty Ayala-León ◽  
Gabriel García Herbosa ◽  
José V. Cuevas ◽  
Virginia Diez ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Variable Temperature ◽  
Molecular Mechanic ◽  
Chair Conformation ◽  
Boat Conformation ◽  
X Ray ◽  
H Nmr ◽  
Conformational Interconversion ◽  
Chloride Adduct

The synthesis of N-[4-(2-hydroxyethyl)-1,2,4-oxathiazinan-3-ylidene]-benzamide (2a) and N-[4- (2-hydroxyethyl)-1,2,4-oxathiazinan-3-ylidene]-2-fluorobenzamide (2b) by oxidation of the corresponding 1,1-bis(2-hydroxyethyl)-3-aroylthioureas with potassium iodate in aqueous solution is reported. Variable temperature 1H NMR spectra of 2a prove that the heterocyclic 1,2,4-(O, S,N) sixmembered ring is involved in a dynamic chair-boat conformational interconversion. Molecular mechanic calculations show that the chair conformation is more stable than the boat conformation by 3.0 kcal/mol. The synthesis of the adduct [(2a)·0.5 HgCl2] 3 as well as the X-ray structural characterization of 2a and 3 are also reported.

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

Structural characterization of monacolin compounds from red yeast rice by liquid chromatography and tandem mass

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
YH Wang ◽  
B Avula ◽  
Z Zhang ◽  
M Wang ◽  
S Sagi ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Structural Characterization ◽  
Red Yeast Rice ◽  
Tandem Mass ◽  
Red Yeast
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