Factor analysis of spectral data from chemical reactions

1990 ◽  
pp. 197-205 ◽  
Author(s):  
G. Gauglitz ◽  
S. Weiß
Keyword(s):  
Factor Analysis ◽  
Spectral Data ◽  
Chemical Reactions

Coumarins and a Naphthyl Labdanoate Diarabinoside from the Fruits of Peucedanum grande C. B. Clarke

2012 ◽  
Vol 67 (11-12) ◽  
pp. 580-586 ◽  
Author(s):  
Mohammad Aslam ◽  
Mohammed Ali ◽  
Rameshwar Dayal ◽  
Kalim Javed
Keyword(s):  
Data Analysis ◽  
Spectral Data ◽  
Chemical Reactions ◽  
Wistar Rats ◽  
Methanolic Extract ◽  
Nephroprotective Activity ◽  
Coumarin 1 ◽  
Spectral Data Analysis

Phytochemical investigations of the methanolic extract of the fruits of Peucedanum grande C. B. Clarke (Apiaceae) led to the identification of three coumarins and a naphthyl labdanoate diarabinoside characterized as 5-hydroxy-6-isopranyl coumarin (1), 5,6-furanocoumarin (2), 7-methoxy-5,6-furanocoumarin (3), and labdanyl-3α-ol-18-(3’’’-methoxy-2’’’- naphthyl-oate)-3α-L-arabinofuranosyl-(2’→1’’)-α-L-arabinofuranoside (4). The structures of these compounds were identified on the basis of spectral data analysis and chemical reactions. The methanolic extract and 4 showed nephroprotective activity against gentamicininduced nephrotoxicity in Wistar rats.

Spectrophotometric determination of melamine in milk by rank annihilation factor analysis based on pH gradual change-UV spectral data

2011 ◽  
Vol 126 (2) ◽  
pp. 745-750 ◽  
Author(s):  
Yating Liu ◽  
Jian Deng ◽  
Lin An ◽  
Jun Liang ◽  
Fei Chen ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Spectral Data ◽  
Spectrophotometric Determination ◽  
Gradual Change

Determination of rate constants from two-way kinetic-spectral data by using rank annihilation factor analysis

2002 ◽  
Vol 454 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Zhong-Liang Zhu ◽  
Jun Xia ◽  
Jiang Zhang ◽  
Tong-Hua Li
Keyword(s):  
Factor Analysis ◽  
Spectral Data ◽  
Rate Constants

Nouveaux alcaloïdes bisbenzylisoquinoléiques biphényliques de Crematosperma sp.

1989 ◽  
Vol 67 (2) ◽  
pp. 275-278 ◽  
Author(s):  
Jairo Saez ◽  
Estella Fernandez ◽  
Akino Jossang ◽  
André Cavé ◽  
Adrien Cavé
Keyword(s):  
Spectral Data ◽  
Chemical Reactions

Four new alkaloids, (−)-cordobine 1, (−)-monterine 2, (−)-granjine 3, and (−)-cordobimine 4 have been isolated from a Colombian Annonaceous plant, Crematosperma sp. Structures were elucidated from spectral data and chemical reactions. These alkaloids are the first 1R, 1′S bisbenzyltetrahydroisoquinolines including 8,7′ ether and 11,11′ biphenyl linkages. Keywords: Annonaceae, Crematosperma, alkaloids, biphenylbisbenzylisoquinolines.

New Antifungal Xanthones from the Seeds of Rhus coriaria L.

2011 ◽  
Vol 66 (1-2) ◽  
pp. 17-23 ◽  
Author(s):  
Onkar Singh ◽  
Mohammed Ali ◽  
Nida Akhtar
Keyword(s):  
Data Analysis ◽  
Carboxylic Acid ◽  
Dicarboxylic Acid ◽  
Spectral Data ◽  
Aspergillus Flavus ◽  
Chemical Reactions ◽  
Ethanolic Extract ◽  
Rhus Coriaria ◽  
Spectral Data Analysis

Phytochemical investigations of the ethanolic extract of the seeds of Rhus coriaria L. (Anacardiaceae) led to the identification of four new xanthones, characterized as 2,3-dihydroxy- 7-methyl xanthone (1), 2,3,6-trihydroxy-7-hydroxymethylene xanthone-1-carboxylic acid (2), 2-methoxy-4-hydroxy-7-methyl-3-O-β-D-glucopyranosyl xanthone-1,8-dicarboxylic acid (4), and 2-hydroxy-7-hydroxymethylene xanthone-1,8-dicarboxylic acid 3-O-β-D-glucopyranosyl- (2’ → 3’’)-3’’-O-stigmast-5-ene (5), along with the known steroidal glucoside β-sitosterol-β-Dglucoside (3). The structures of the isolated compounds have been identifi ed on the basis of spectral data analysis and chemical reactions. All xanthones were active against Aspergillus flavus.

Synthesis of Phthaleins with a Chiral Carbon Atom

1973 ◽  
Vol 28 (7-8) ◽  
pp. 468-470 ◽  
Author(s):  
R. Gopal ◽  
P. C. Gupta ◽  
V. P. Aggarwala ◽  
S. P. Garg
Keyword(s):  
Carbon Atom ◽  
Benzoic Acid ◽  
Spectral Data ◽  
Chemical Reactions ◽  
Chiral Carbon

Phthaleins (PE) with a chiral carbon atom - phenyl phenol PE, phenyl resorcinol PE, phenyl catechol PE, phenyl quinol PE, phenyl pyrogallol PE, phenyl phloroglucinol PE and phenyl orcinol PE have been obtained by condensing 2-benzoyl benzoic acid with appropriate phenols. The structure of phenyl resorcinol phthalein, which was found to exist in two isomeric forms, based on chemical reactions and spectral data has been discussed. The Amax values for most of the dyes were found higher than their analogous phthaleins.

Trifluormethyldisulfan / Trifluoromethyldisulfane

1975 ◽  
Vol 30 (3-4) ◽  
pp. 169-174 ◽  
Author(s):  
W. Gombler ◽  
F. Seel
Keyword(s):  
Mass Spectrum ◽  
Spectral Data ◽  
Chemical Reactions ◽  
Vapour Pressure ◽  
Boiling Point ◽  
Pressure Data ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr

The reaction of trifluoromethylchlorosulfane with an excess of hydrogensulfide yields trifluoromethyldisulfane. The new compound has been characterised by its IR, Raman, 19F and 1H NMR, UV and mass spectrum, melting and boiling point and by vapour pressure data. The result of some chemical reactions are reported. Furthermore, previously unreported NMR and mass spectral data of CF3SH, CF3S3CF3 and CF3S4CF3 are given.

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