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Publikováno v:
Water Research. 24:1341-1346
A novel in situ device for the direct potentiometric detection of pH, pe and pH 2 S values (where p = −log activity) is introduced. The mechanical and electrochemical problems associated with liquid-junction type reference cells for pH and pe measu
Publikováno v:
Anxiety. 2(3)
Worry about the generalizability of findings derived from clinical trials is a nagging problem. Because most clinical trials use individuals recruited by advertisements rather than patients solicited from clinical practice, bias in subject recruitmen
Publikováno v:
Psychopharmacology bulletin. 31(1)
There is consistent concern about the generalizability of research findings generated by clinical trials. There are several reasons for concern about these findings: (1) most clinical trials involve symptomatic volunteers who are recruited by means o
Autor:
Robert M. Bilder, Kelvin O. Lim, Philip R. Szeszko, T. Frevert, Manzar Ashtari, J. Kane, Anil K. Malhotra, Joshua Vogel
Publikováno v:
Schizophrenia Research. 60:208-209
Publikováno v:
Cardiopulmonary Physical Therapy Journal. 23:40
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 69:145-165
Stromatolites occurring in three areas of landlocked pools on Aldabra show distinctive morphologies, petrography and biological characteristics related both to water chemistry and the physical characteristics of sites. They are formed apparently by i
Autor:
O. Klemm, T. Frevert
Publikováno v:
Archives for Meteorology, Geophysics, and Bioclimatology Series B. 34:75-81
Publikováno v:
Environmental and Experimental Botany. 27:349-355
pH measurements on leaves of Hedera helix L. indicated the amount and strength of acids present on the leaves and the buffering mechanisms taking place. To measure the amount and strength of acids on dry leaves the leaf surfaces had to be wetted with
Autor:
T. Frevert, H. Galster
Publikováno v:
Schweizerische Zeitschrift für Hydrologie. 40:199-208
A direct potentiometric measurement chain (pH2S-electrode) for in situ determination of H2S in aquatic habitats is proposed which works like a conventional glass electrode chain but with Ag, Ag2S as reference electrode. In the pH range ≤6 pStot can