scholarly journals Synthesis of 7α- and 17-Bromonorambreinolides from Norambreinolide

2007 ◽  
Vol 2 (1) ◽  
pp. 114-118
Author(s):  
Pavel F. Vlad ◽  
Alexandru G. Ciocarlan ◽  
Grigore N. Mironov ◽  
Mihai N. Coltsa ◽  
Yurii A. Simonov ◽  
...  
Keyword(s):  
Spectral Data ◽  
X Ray ◽  
Isomeric Methyl

A mixture of 7α- and 17-bromonorambreinolides was obtained on treatment of the mixture of isomeric methyl bicyclohomofarnesenoates, the norambreinolide transesterification product, with NBS and H2O2. The structure of 7α- and 17-bromonorambreinolides was elucidated on the basis of spectral data. The structure of 17-bromonorambreinolide was confirmed by its reduction with LiAlH4 into sclaradiol, and that of 7α-bromonorambreinolide by X-ray analysis.

Synthesis of 4-(3-coumarinyl)-3-benzyl-4-thiazolin-2-one 4-methylbenzylidenehydrazone and determination of the isomeric structure by X-ray analysis

2003 ◽  
Vol 218 (12) ◽  
Author(s):  
Süheyla Özbey ◽  
Nilgün Karalı ◽  
Aysel Gürsoy
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Spectral Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isomeric Structure ◽  
Elemental Analyses

AbstractIn this study 4-(3-coumarinyl)-3-benzyl-4-thi azolin-2-one 4-methylbenzylidenehydrazone 3 was synthesised. An independent proof of the thiazolylhydrazone structure of 3 was achieved by single crystal X-ray diffraction analysis. Elemental analyses and spectral data (IR,

scholarly journals Doppler Tomography in 2D and 3D of the X-ray Binary Cyg X-1 for June 2007

2011 ◽  
Vol 7 (S282) ◽  
pp. 201-202 ◽  
Author(s):  
O. I. Sharova ◽  
M. I. Agafonov ◽  
E. A. Karitskaya ◽  
N. G. Bochkarev ◽  
S. V. Zharikov ◽  
...  
Keyword(s):  
Binary System ◽  
Spectral Data ◽  
Inclination Angle ◽  
Tomographic Reconstruction ◽  
Orbital Plane ◽  
National Observatory ◽  
Doppler Tomography ◽  
X Ray ◽  
2D And 3D ◽  
First Time

AbstractThe 2D and 3D Doppler tomograms of X-ray binary system Cyg X-1 (V1357 Cyg) were reconstructed from spectral data for the line HeII 4686Å obtained with 2-m telescope of the Peak Terskol Observatory (Russia) and 2.1-m telescope of the Mexican National Observatory in June, 2007. Information about gas motions outside the orbital plane, using all of the three velocity components Vx, Vy, Vz, was obtained for the first time. The tomographic reconstruction was carried out for the system inclination angle of 45°. The equal resolution (50 × 50 × 50 km/s) is realized in this case, in the orbital plane (Vx, Vy) and also in the perpendicular direction Vz. The checkout tomograms were realized also for the inclination angle of 40° because of the angle uncertainty. Two versions of the result showed no qualitative discrepancy. Details of the structures revealed by the 3D Doppler tomogram were analyzed.

A novel cyclocondensation of xanthates containing active methylene groups with isothiocyanates. Spectral data and X-ray structures of the products

Tetrahedron ◽  
1992 ◽  
Vol 48 (33) ◽  
pp. 6863-6874 ◽  
Author(s):  
G.V. Tormos ◽  
V.Yu. Khodorkovsky ◽  
O.Ya. Neilands ◽  
S.V. Belyakov
Keyword(s):  
Spectral Data ◽  
X Ray ◽  
Methylene Groups ◽  
Active Methylene

Analysis of X-ray spectral data with genetic algorithms

2002 ◽  
Vol 75 (5) ◽  
pp. 625-636 ◽  
Author(s):  
I.E Golovkin ◽  
R.C Mancini ◽  
S.J Louis ◽  
R.W Lee ◽  
L Klein
Keyword(s):  
Genetic Algorithms ◽  
Spectral Data ◽  
X Ray

scholarly journals Post Processing Hyper-Spectral Data and Generating More Information from X-ray Maps

2013 ◽  
Vol 19 (S2) ◽  
pp. 828-829 ◽  
Author(s):  
R. Wuhrer ◽  
K. Moran
Keyword(s):  
Spectral Data ◽  
Post Processing ◽  
X Ray ◽  
Hyper Spectral

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

scholarly journals A Phenylpropanoid and Biflavonoids from the Needles of Cephalotaxus harringtonia var. harringtonia

2017 ◽  
Vol 12 (11) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Anju Mendiratta (Nee Chugh) ◽  
Rameshwar Dayal ◽  
John P. Bartley ◽  
Graham Smith
Keyword(s):  
Nmr Spectroscopy ◽  
Oral Dose ◽  
Spectral Data ◽  
2D Nmr ◽  
Hepatoprotective Activity ◽  
X Ray Diffraction ◽  
Soluble Extract ◽  
2D Nmr Spectroscopy ◽  
X Ray ◽  
First Time

A phenylpropanoid [2-(3-methoxy-4-hydroxyphenyl)-propane-1,3-diol] (1) together with four known biflavonoids namely 7, 4′, 7′″, 4′″-tetra- O-methyl amentoflavone (2); 7, 4′, 7″-tri- O-methyl amentoflavone (3); ginkgetin (4); sequoiaflavone (5) were isolated from the acetone soluble extract of needles of Cephalotaxus harringtonia var. harringtonia. Their structures were elucidated mainly on the basis of interpretation of 1D and 2D NMR spectroscopy and X-ray diffraction studies. The detailed spectral data of phenylpropanoid have been described for the first time. Ginkgetin (4) exhibited significant hepatoprotective activity in rat at 6 mg/kg oral dose level.

scholarly journals The XMM-Newton spectral-fit database

2013 ◽  
Vol 9 (S304) ◽  
pp. 155-156
Author(s):  
A. Corral ◽  
I. Georgantopoulos ◽  
S. Rosen ◽  
M. G. Watson ◽  
K. Page ◽  
...  
Keyword(s):  
Spectral Data ◽  
Spectral Properties ◽  
X Ray ◽  
Spectral Fitting ◽  
Source Selection ◽  
Fundamental Goal ◽  
Data Products ◽  
Funded Project ◽  
Representative Samples

AbstractThe XMM-Newton spectral-fit database is an ongoing ESA funded project aimed to construct a catalogue of spectral-fitting results for all the sources within the XMM-Newton serendipitous source catalogue for which spectral data products have been pipeline-extracted (≳ 120,000 X-ray source detections). The fundamental goal of this project is to provide the astronomical community with a tool to construct large and representative samples of X-ray sources by allowing source selection according to spectral properties.

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