Niemann, Gerard J. Baas, Wim J.
Published in
Zeitschrift für Naturforschung C
Eleven flavonoids, four phenolic glucosides and one sugar ester were isolated from needles of Larix decidua and identified as: kaempferol, its 3-arabinoside and 3-rutino-side, quercetin-3-arabinoside, isorhamnetin-3-arabinoside and 3-(p-coumarylglucoside), laricitrin-3-glucoside and -3-rutino-side, myricetin-3-glucoside, syringetin-3-glucoside and ...
Räuber, Norbert R. K. Jany, Klaus-Dieter Pfleiderer, Gerhard
Published in
Zeitschrift für Naturforschung C
The digestion of ribonuclease A by proteinase K yielded one major degradation product only, which could not be distinguished from ribonuclease S by electrophoretical and immunological methods. This component (ribonuclease K) possessing full catalytic activity was characterized to be (1-20/211-124) ribonuclease A . Combined action of proteinase K an...
Schoch, Siegrid
Published in
Zeitschrift für Naturforschung C
The accumulation of esterfied chlorophyll a (Chl a) in etiolated bean leaves was determined during a dark period of 60 minutes after 1 minute irradiation with white light. The separation of the pigments esterified with geranylgeraniol (GG), dihydrogeranylgeraniol (DHGG), tetrahydrogeranylgeraniol (THGG) and phytol (P) was performed by HPLC. The las...
Kopp, Brigitte Löffelhardt, Wolfgang Kubelka, Wolfgang
Published in
Zeitschrift für Naturforschung C
[19-3H ] Strophanthidol, fed to leaves of whole plants of Convallaria majalis L., was translocated to the rhizomes and roots. Oxidation to [19-3H] strophanthidin took place in the leaves only. No labelled glycosides of strophanthidol and strophanthidin were found; thus, the aglycones are not precursors of the respective glycosides. It is assumed th...
Janistyn, B.
Published in
Zeitschrift für Naturforschung C
c-AMP(10−4 ᴍ) has a stimulating effect on the growth of corn coleoptiles similar to that of IAA(10-5 ᴍ) . However this effect of c-AMP is more rapid and ceases after ca. 3 hours. In the presence of the phosphodiesteraseinhibitor theophylline the stimulating effect of c-AMP lasts for 3,5 hours only, and after this period, the coleoptiles shrink and ...
Seefried, Hans Czygan, Franz-C.
Published in
Zeitschrift für Naturforschung C
Composition and metabolism of carotenoids in Arctodiaptomus bacillifer taken from a mountain lake in the Alps have been studied. This copepode contains esters of astaxanthin (3,3′-dihydroxy-β,β-carotene-4,4′-dion) mainly. Besides β-carotene (β,β-carotene) and unesterified zeaxanthin (β,β-carotene-3,3′-diol), esters of hydroxyechinenone (3-hydroxy-β...
Nandi, Dhirendra L.
Published in
Zeitschrift für Naturforschung C
Physical measurements were made on the ζ-aminolevulinic acid synthetase from Rhodopseudomonassph eroides. These include a Stokes radius of 3.8 nm, determined by gel filtration, and sedimentation coefficient of 5.46 S by sucrose density gradient centrifugation. From these measurements and the value of partial specific volume of 0.732 ml/g determine...
Bowyer, John R. Baccarini-Melandri, Assunta Melandri, B. Andrea Crofts, Antony R.
Published in
Zeitschrift für Naturforschung C
1. The effects of lyophilization and the extraction of ubiquinone-10 on the kinetics of electron transport in Rhodopseudomonas capsulata Ala pho+ have been investigated. 2. Lyophilization reduced the amount of ferrocytochrome c2 photo-oxidized on a microsecond time scale following a single excitation. 3. Lyophilization increased the reactivity of t...
Berlin, Jochen Mutert, Ulrich
Published in
Zeitschrift für Naturforschung C
It is shown by competition experiments that tobacco cell lines have distinct transport systems for ʟ-amino acids. For all tested amino acids the Lineweaver-Burk plots were diphasic indicating the presence of more than one carrier for any one amino acid. Moreover distinct transport systems for neutral, acidic and basic amino acids were kinetically c...
Löfroth, Göran
Published in
Zeitschrift für Naturforschung C
Dichloroacetaldehyde, a presumed metabolite of the in secticides dichlorvos and tridilorphon, is mutagenic in the Salmonella/microsome test. Its mutagenic potency is higher than that of the established mutagen dichlorvos. It is pos sible that the bacterical mutagenicity test only or mainly detects the effect of methylation by dichlorvos.
