Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Donald L. Johnstone"'
Autor:
Donaldo P. Mendoza, Donald L. Johnstone, Mahesh A. Rege, William A. Apel, James N. Petersen, Yared Bereded-Samuel, David R. Yonge, Joni M. Barnes
Publikováno v:
Biotechnology and Bioengineering. 62:479-484
A denitrifying bacterial consortium obtained from the Pullman, Washington wastewater treatment facility was enriched under denitrifying conditions and its ability to reduce selenite and selenate was studied. Replicate experiments at two different exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f63e697e8a817f1a34e8ea7e35f3385
https://doi.org/10.1002/(sici)1097-0290(19990220)62:4<479::aid-bit11>3.0.co
https://doi.org/10.1002/(sici)1097-0290(19990220)62:4<479::aid-bit11>3.0.co
Autor:
Mahesh A. Rege, William A. Apel, Donald L. Johnstone, David R. Yonge, Charles E. Turick, James N. Petersen, Eric A. Schmieman
Publikováno v:
Journal of Environmental Engineering. 124:449-455
Most previous studies of bacterial reduction of chromium have been done with pure cultures that are not likely to be found in ground water, and at hexavalent chromium concentrations much greater than typically present in contaminated ground water. Fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab907b7595bf135edb447ffa524940bc
https://doi.org/10.1061/(asce)0733-9372(1998)124:5(449)
https://doi.org/10.1061/(asce)0733-9372(1998)124:5(449)
Autor:
Charles E. Turick, David R. Yonge, James N. Petersen, William A. Apel, Mahesh A. Rege, Donald L. Johnstone
Publikováno v:
Biotechnology Letters. 19:691-694
Chromium(VI) was reduced by Enterobacter cloacae strain HO1 grown with sucrose as a carbon source and nitrate as the initial terminal electron acceptor. Under excess substrate conditions, the Cr(VI) concentration, initially at 5 and 10 mg/l, was redu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68b4b8a7276a29854de8901501eed82a
https://doi.org/10.1023/a:1018355318821
https://doi.org/10.1023/a:1018355318821
Autor:
Donald L. Johnstone, Sungho Kong
Publikováno v:
Biotechnology Letters. 16:1217-1220
Toxicity of toluene and o-xylene was tested with a deep subsurface isolate during 120 day starvation period. During 120 day starvation period, toxicity appeared to increase with cell age until cells reached the starvation mode. This result may have a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e2e66e149321135a9990346faed6ff7
https://doi.org/10.1007/bf01020854
https://doi.org/10.1007/bf01020854
Publikováno v:
Applied Microbiology and Biotechnology. 42:403-407
Subsurface bacteria were used to study the kinetics of chromate uptake and the internal distribution of the chromium that is taken up by these cells using two equilibration periods (1 and 50 days). Cells that were exposed to chromate for 50 days (to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91ec0fa018ebdde97520840767ad22e3
https://doi.org/10.1007/bf00902749
https://doi.org/10.1007/bf00902749
Publikováno v:
Biotechnology Letters. 15:1081-1084
Remobilization of chromium was studied using three types of cells in different physiological states. Cell age was not a factor in chromium remobilization processes. Both fresh and 50 day starved cells showed a similar pattern (rate) of chromium remob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a615f53c699cae887a54f6d5b3dc9678
https://doi.org/10.1007/bf00129942
https://doi.org/10.1007/bf00129942
Publikováno v:
Biotechnology Letters. 15:733-736
A fractional factorial statistical experimental design was used to ascertain which experimental parameters affect the rate at which Cr6+ is sorbed by a consortium of denitrifying bacteria. Data from this set of experiments indicates that the amount o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6b467b15f3591626864f1a9d56f44d9
https://doi.org/10.1007/bf01080147
https://doi.org/10.1007/bf01080147
Publikováno v:
Biotechnology Letters. 15:727-732
The accumulation of metal ions on to biological materials is a promising method for removing these toxic materials from waste or ground-waters. A fractional factorial statistical experimental design was used to ascertain which experimental parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03f10ac96a18acc7b7ae5cb3c9ed3d06
https://doi.org/10.1007/bf01080146
https://doi.org/10.1007/bf01080146
Publikováno v:
Water Resources Research. 29:647-659
Carbon dioxide COncentrations were measured at various depths and times in the unsaturated zones of two hydraulically and geochemically contrasting field sites, one in southeastern Washington state, and the other in south central Saskatchewan. In sit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f39c599220f5cc47009c539b7fada8d9
https://doi.org/10.1029/92wr02315
https://doi.org/10.1029/92wr02315
Publikováno v:
Biotechnology Letters. 15:87-92
The sorption of chromium (Cr+6) was investigated for 50 day starved and fresh cells in the presence of sulfate ion as a competing ion at three pH values (pH 6.0, 7.5 and 9.0). The chromium distribution in the subcellular components was also determine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3cbc8b436db5cef75e5c4ea83b2a91d
https://doi.org/10.1007/bf00131559
https://doi.org/10.1007/bf00131559