Hagemann, H.; Imkampe, K.(Berlin : De Gruyter, 1972)
Electron densities at the nucleus of several simple phenols and plant phenols such as catechin and quercetin are calculated by the HMO-method. We found a correlation between the maximum of the electron density at the nucleus ...
Absorption of a pulse of laser light in the surface region of a solid causes a fast temperature increase, followed, after the end of the laser pulse, by a rapid decrease to the base temperature. Experiments with a Nd laser ...
Christmann, K.; Ertl, G.(Berlin : De Gruyter, 1973)
LEED/Auger studies with Ir(110) revealed that the clean surface is reconstructed to a 1X2-structure, whereas the normal 1 X 1-structure can be stabilized by small amounts of carbon impurities. Carbon monoxide adsorbs with ...
The bleeding rate as well as transport of K+, NO3− and PO4−−− within the bleeding sap of corn plants (Zea mays) has been studied in intervals after raising the nitrate concentration of the nutrient solution from 5 to 10 ...
Läßt man bei Raumtemperatur unter Sauerstoffausschluß CS2 über die Gasphase in eine NH3-gesättigte wäßrige Lösung von [Co(NH3)6Cl2 diffundieren, dann bilden sich im Verlaufe von 24 Stdn. blauschwarze ...
Wöldecke, M.; Herrmann, Karl(Berlin : De Gruyter, 1974)
For the first time, quercetin-3-β-ᴅ-glucuronide, quercetin-3-β-ᴅ-glucoside, quercetin-3-(O-malonyl) -β-ᴅ-glucoside and luteolin-7-/9-ᴅ-glucuronide were isolated from lettuce and kaempferol-3-β-D-glucuronide and ...
Wöldecke, M.; Herrmann, Karl(Berlin : De Gruyter, 1974)
The predominant caffeic acid compound of endives has been crystallized after column chromatography on polyamide and cellulose and was identified as ᴅ -(+) -dicaffeoyl tartaric acid.
Weyssenhoff, H.V.; Rehling, U.(Berlin : De Gruyter, 1974)
When a weak absorber is placed inside the cavity of a broadband untuned dye laser a strong enhancement of the extinction is observed. This effect is investigated quantitatively for the absorption of the Na-D1 line by sodium ...
Lohmann, Wolfgang; Hillerbrand, Max; Klenert, Max(Berlin : De Gruyter, 1974)
The charge-transfer interaction of different nucleobases with Cu2+has been investigated by means of ESR and optical absorption studies. It could be shown that cytosine forms the strongest complex. The greatest reduction ...
Roth, W.; Gottwald, B.A.; Haul, R.(Berlin, Boston : De Gruyter, 1974)
Transient molecular flow studies of CH4, CD4 and mixtures using a Pyrex glass capillary were carried out under UHV-conditions at temperatures between 77.4 and 115 K and pressures between 10-5 and 10-3 Torr (10-3<0<10-1). ...
Bölsing, Friedrich; Spanuth. E.(Berlin : De Gruyter, 1976)
9,10-Diazophenanthrone undergoes WOLFF rearrangement in alcoholic solvents and yields esters of 9-fluorene carboxylic acid. By flash light photolysis four intermediates could be detected. Kinetic measurements showed that ...
Bölsing, Friedrich; Spanuth, E.(Berlin : De Gruyter, 1976)
Diphenyldiazomethane reacts with triphenylborane to yield benzophenonazine and benzophenone triphenylmethylhydrazone. The formation of the latter is elucidated by ESR spectroscopic detection of the triphenylmethyl radical. ...