ISSN:0958-0344    

DOI:10.1002/pca.2800020602

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractThe Ca2+‐binding protein calmodulin has been purified to homogeneity from cell suspension cultures ofCatharanthus roseusby high performance liquid chromatography and two isoforms have been detected by SDS‐PAGE and non‐denaturing PAGE. The methodologies employed in the isolation, purification, assay and physicochemical characterization of the protein are discussed, and the differences betweenC. roseuscalmodulin and spinach calmodulin are desc

ISSN:0958-0344    

DOI:10.1002/pca.2800020603

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractDiethylamides were prepared from polyunsaturated long‐chain fatty acids and were examined by gas chromatography/mass spectrometry. The spectra contained informative ions which allowed immediate recognition of the position of the original double bonds. The derivatives were easily prepared in one step and were baseline‐separated on the gas chromatographic column at moderate temperatures. This method was suitable for samples of long‐chain fatty acid mix

ISSN:0958-0344    

DOI:10.1002/pca.2800020604

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractOn‐line coupled multidimensional gas chromatography (DB‐5/Lipodex D)/mass spectrometry (MDGC/MS) revealed the occurrence of (1S)‐(–‐)‐2‐endo‐acetoxy‐3‐exo‐hydroxybornane (vulgarole) with 100% enantiomeric excess in mugwort (Artemisia vulgarisL.) herb. The result was verified by means of synthesized optically pure (1R) and (1S) ena

ISSN:0958-0344    

DOI:10.1002/pca.2800020605

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractA new mechanism is decribed for self‐association of anthocyanins in solution. Petanin, petunidin 3‐O‐[6‐O‐(4‐O‐E‐p‐coumaroyl‐α‐L‐rhamnopyranosyl)‐β‐D‐glucopyranoside]‐5‐O‐β‐D‐glucopyranoside, was studied in acidified methanolic solution using the nuclear Overhauser enhancement (NOESY) nuclear magnetic resonance technique. Intra‐ and inter‐molecular NOESY cross‐peaks were observed, and the corresponding proton‐proton distance bounds were used in distance geometry calculations to determine the stacking of the petanin aglycones. The orientation of two self‐associated petanin aglycones was found to be head‐to‐tail along both the long and the short aglycone axis. Lack of observed NOESY cross‐peaks between protons of the coumaroyl group and the aglycone indicated absence of intramolecular stacking of the stable petanin molecules. Non‐coplanarity between the planes

ISSN:0958-0344    

DOI:10.1002/pca.2800020606

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractThe determination of the isomeric 3,3′‐, 4,4′‐ and 3,4‐di‐O‐methylellagic acid derivatives by high performance liquid chromatography and ultraviolet, nuclear magnetic resonance and infrared spectroscopy

ISSN:0958-0344    

DOI:10.1002/pca.2800020607

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0958-0344    

DOI:10.1002/pca.2800020608

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0958-0344    

DOI:10.1002/pca.2800020601

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY