Showing papers in "Phytochemistry in 1975"

TL;DR: Procyanidin A from Aesculus hippocastanum differs from the B type procyanin in that it is difficultly soluble in water, gives a higher yield of cyanidin when heated in butanolic HCl and the production of cyanide continues beyond the 2-hour period sufficient for maximum production in the case of B-type procyaneidin this paper.

TL;DR: Simple aliphatic monoamines are formed in the red algae by a non-specific amino acid carboxy-lyase with broad substrate specificity, and several new polyamine alkaloids have been characterized.

TL;DR: The residual proteins are resistant to pronase, rich in hydroxyproline and have the amino acid composition of purified cell wall proteins, showing that the wall preparations are relatively pure.

TL;DR: Amino acids and low-MW carbohydrates of 18 red algae have been analyzed and several non-protein amino acids have been identified, including pyrrolidine-2,5-dicarboxylic acid and N -methylmethionine sulfoxide sulfoxide.

TL;DR: The literature dealing with the detection, isolation, purification and characterization of cyanogenic glycosides has been integrated with spectral and chemical data as well as other techniques from our laboratory as discussed by the authors.

TL;DR: Two intensely mauve UV fluorescent compounds isolated from Tagetes root were found to be phototoxic to Candida albicans by chromatography on alumina followed by gel filtration on Sephadex LH-20 as discussed by the authors.

TL;DR: The amount of wax/cm2 on expanding primary leaves of bonus barley depends on both the photo-and thermoperiods in which the seedlings are grown as mentioned in this paper, which demonstrates that wax synthesis and extrusion is not directly correlated with leaf expansion.

TL;DR: Dihydroquercetin proved to be a good precursor for light-stimulated cyanidin biosynthesis in cell suspension cultures of Haplopappus gracilis.

TL;DR: Structural changes in galactomannan on germination of lucerne, carob, honey locust, guar and soybean seeds, as measured by viscosity, elution volumes on gel filtration and ultra-centrifugation were slight consistent with a rapid and complete hydrolysis of a molecule once hydrolyzing of the mannan chain starts.

TL;DR: Most of the data presented suggest that proline dehydrogenase and pyrroline-5-carboxylate reductase activities occur on the same protein molecule.

TL;DR: In Salvia mellifera, the monoterpene volatilization is primarily dependent on the vapor pressures of the terpenes as they are influenced by temperature, the humidity of the air surrounding the leaf and the surface area of oil present on the leaf.

TL;DR: Compared to similar enzymes isolated from mammalian tumor cells, the lupin enzyme appears to be unique with respect to MW, reaction mechanism and regulatory properties, and the allosteric properties observed suggest an important role for this enzyme in the regulation of asparagine biosynthesis.

TL;DR: Malonic acid, mevalonic Acid, geraniol and nerol were incorporated into tetrahydrocannabinolic acid and cannabichromenic acid in Cannabis sativa and CannabichROMenic acid was shown to be formed on a side pathway from cannabigerolic acid.

TL;DR: In this article, the structure of dissymmetrical 6,8-di-C -glycosylflavones is discussed and the natures of the sugar in both the 6 and 8 positions can be determined.

TL;DR: This is the first report of the sesquiterpenoid aldehydes and 6-methoxyhemigossypol in nature, and of NMR and m.p. data for crystalline pure.

TL;DR: The chemistry of the 36 flavone and flavonol sulphates so far detected in higher plants is summarized in this paper, and the possible function of these novel sulphur compounds in relation to their frequent occurrence in water plants is discussed.

TL;DR: It is suggested that sucrose accumulation at 2°, which is catalysed by sucrose phosphate synthetase, is not due to changes in the maximum catalytic activities of any of the above enzymes, but may be due to the susceptibility of key glycolytic enzymes to cold.

TL;DR: A new cytokinin was isolated from mature leaves of poplar and confirmed by synthesis as 6-(o-hydroxybenzylamino)-9-β-d-ribofuranosylpurine, which has medium activity in the soybean callus test but shows highActivity in the radish leaf senescence test.

TL;DR: In this article, a qualitative method for the analysis of flavonols and flavones in hydrolysed extracts of plant organs is described; the procedure involves thin layer and column chromatography of plant extracts on polyamide.

TL;DR: A rapid and efficient method for the isolation of glycollate oxidase from pea leaves is described, utilizing the unusually high isoelectric point (pH 9·6) which has been determined for the enzyme using isOElectric focusing.

TL;DR: Acid invertase activity in Lycopersicon esculentum was highest in the locular wall of ripe fruit and lowest in roots, and of various tissues from a number of wild tomato species examined, the fruit of L. pimpinellifolium were particularly rich in the enzyme.

TL;DR: Selective effects of lincomysin and cycloheximide in detached shoots of Pisum sativum on the synthesis of photosystem I and II proteins, and a chloroplast membrane protein of molecular weight 32000, confirm results obtained from studies of protein synthesis by isolated chloroplasts.

TL;DR: The anthocyanin and flavonol glycosides in Larkspur flowers (cv Dark Blue Supreme) are delphinidin 3-di( p -hydroxybenzoyl)glucosyl glucoside, and kaempferol 3-robinobioside-7-rhamnoside (robinin), kaempeferol 3 -rutinoside, kaEMPferol 7-ramnoside, etc. as discussed by the authors.

TL;DR: A microspectrophotometric method has been developed for calorimetric pH determination using indicator dyes as discussed by the authors, which can be used to determine the pH change in aging flowers.

TL;DR: Experiments with cycloheximide and density-labelling in deuterium oxide suggest that the observed increases in activity are the result of de novo protein synthesis.

TL;DR: The induced antifungal compound in soybean is shown to have been previously incorrectly identified by other workers as 6a-hydroxyphaseollin and a new structure is proposed.

TL;DR: Polyacrylamide-gel electrophoresis revealed 9 polyphenol oxidase (PPO) isoenzymes in the interior of banana pulp, 8 in the exterior pulp, and 10 in the peel.

TL;DR: This is the first report of 2 and 3 in nature and of 4 and 5 from healthy roots of Gossypium hirsutum and G. barbadense and proof of structure for 2 and3 are presented.