Showing papers in "Phytochemistry in 1972"

TL;DR: Glycosides of the 6 common anthocyanidins all formed co-pigment complexes with flavonoids and other compounds at pH's ranging from 2 to 5 as discussed by the authors.

TL;DR: It is found, that, as in higher plants, there are specific fatty acid distributions in the galactosyl diglycerides, e.g. the ω3 acids with the highest unsaturation are concentrated in the monogalacto-diglycerides.

TL;DR: Although there is a great paucity of data, the variation in the arylpropanoids, alkaloids, flavanoids and terpene constituents is in general in agreement with the subdivision of the Lauraceae.

TL;DR: In this article, two alkaloids have been isolated from Mappia foetida Miers from which the major alkaloid is camptothecin (Ia) and the minor alkalinoid has been shown by spectral studies to be the hitherto unknown 9-methoxy camptothocaine (Ic).

TL;DR: Polyclar AT, an insoluble form of poly- N -vinylpyrrolidone is highly effective in purification of gibberellin-like substances in plant extracts, presumably by selective removal of phenolic compounds and perhaps other organic acids as mentioned in this paper.

TL;DR: In this article, the authors quantitatively determined the combined ellagic acid in the form of esters of hexahydroxydiphenic acid (HHDP) by taking advantage of the formation of a coloured product with nitrous acid.

TL;DR: Goniothalamin, a biologically active styryldihydropyrone isolated from the bark of Goniothalamus andersonii Sinclair, has been shown to be the (+)-(5 S )-δ-lactone of 5-hydroxy-7-phenylhepta-2,6-dienoic acid previously obtained from Cryptocarya caloneura (Scheff).

TL;DR: In this paper, the flavanoid and neoflavanoid constituents of Pterocarpus and Dalbergia species are reviewed together with related compounds and several synthetic procedures analogous to biosynthetic pathways are described.

TL;DR: The in vitro effect of sodium chloride on the enzyme activity of four halophytes, Beta vulgaris ssp.

TL;DR: In this paper, nine methylated flavonols isolated from Larrea cuneifolia Cav. collected in Argentina have been fully characterized using UV, MS and NMR spectral data, all of which were identified as methyl ethers of quercetin and kaempferol.

TL;DR: In this article, four forms of pectinesterase were identified in extracts of tomatoes by chromatography on DEAE-Sephadex A50 and they were different in terms of MW, stability to heat, and their responses to pH and cation concentration.

TL;DR: The elution of 33 GAs and abscisic acid from a gradient eluted (increasing amounts of ethyl acetate in hexane) silica gel partition column are given in this article.

TL;DR: The roots initiated from callus cultures tend to produce the normal pattern of alkaloids, suggesting the operation of self-regulation for alkaloid synthesis as part of the organization.

TL;DR: In this article, the NMR spectra of four pairs of C-24 isomeric sterols, Campesterol, 22,23-dihydrobrassicasterol, α-spinasterol-chondrillasterol and stigmasterol-poriferasterol were studied by NMR-based spectroscopy and their spectra were presented.

TL;DR: Phytase isolated from mung bean cotyledons was purified about 80-fold with a recovery of 28% and lower members of inositol phosphates are better substrates, as shown by their Vmax and Km values.

TL;DR: Conifer leaf lipids contain, in addition to the fatty acids found in angiosperms, a series of polyunsaturated acids with Δ 5 olefinic unsaturation, which are concentrated in the galactosyl diglycerides.

TL;DR: The chemotaxonomy of the Moraceae is discussed in relation to flavonoids, flavonoid with isoprenoid substituents and stilbenes; the phenolic constituents can be useful in the taxonomy ofThe Moraceae if the investigation is extended to other genera and species.

TL;DR: Norsanguinarine (I), a new alkaloid and 6-acetonyldihydrosanguinarines (II), which appears to be an artefact, have been isolated from callus tissue of opium poppy as discussed by the authors.

TL;DR: The natural dihydrostilbene growth inhibitor of liverworts, lunularic acid, is shown to be of general occurrence in the algae and can be detected in mosses or pteridophytes and not generally distributed in higher plants.

TL;DR: Results suggest that photorespiration causes ATP to be synthesized in mitochondria during photosynthesis, and phosphorylation accompanying the conversion of glycine to serine probably involves the electron transport chain of mitochondria and associated phosphorylated sites.

TL;DR: Four indole alkaloids have been isolated and characterized from the tree bark of Alstonia muelleriana Domin and one of these is the previously known dimeric indoles alkaloid, villalstonine.

TL;DR: A detailed analysis of the hydrocarbon fractions from the extracts of 21 ferns belonging to 13 families was carried out and n-Alkanes from C24 to C35 and triterpenoid hydrocarbons of the hopane series were identified.

TL;DR: The results suggest that cutin acid composition may be a useful taxonomic and phylogenetic criterion in selecting species of gymnosperms and ferns.

TL;DR: A comparison of the rate of ethylene production by apple fruit to the methionine content of the tissue suggests that the sulfur of Methionine has to be recycled during its continuous synthesis of Ethylene.

TL;DR: The results add further chemical support to the view that Bentham's circumscription of the tribe CauCalideae is a more natural one than that of Drude and also suggest that the CaucalideAE is a highly specialised group within the family.

TL;DR: A comparison with synthetic model compounds has shown that the predominant isomer of phytoene has a trans,cis,trans triene chromophore.

TL;DR: Two new coumarins from Choisya arizonica and C. mollis and 2′,3′-dihydroxydihydrosuberosin from Coleonema album have been isolated and their structures determined.

TL;DR: A rapid, 4–10-fold, activation of grape catechol oxidase by a short exposure to acid pH or urea is demonstrated, apparently due to conformational changes in the enzyme.

TL;DR: One new and six known flavonoid methyl ethers were isolated variously from seven Artemisia taxa as mentioned in this paper, including dihydroquercetin 7,3′-dimethyl ether, which was obtained from A. pygmaea.

TL;DR: In this paper, N -Methylputrescine oxidase, catalyzing the oxidative deamination of the primary amino group of N -methyl putrescines, was demonstrated in roots of tobacco plants, and purified 150-fold.