Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Ralph J. May"'
Autor:
Radislav A. Potyrailo, Ralph J. May
Publikováno v:
Review of Scientific Instruments. 73:1277-1283
We report a novel sensor-based high throughput screening (HTS) system for identification and quantitation of volatile substances in combinatorial chemical libraries. The measurement method employs a combination of a periodic introduction of a minute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9ec0effb2d56261c9912de679338d1f
https://doi.org/10.1063/1.1448905
https://doi.org/10.1063/1.1448905
Autor:
Ralph J. May, William A. Williams
Publikováno v:
Environmental Science & Technology. 31:3491-3496
To test for low-temperature microbial aerobic PCB degradation, water-saturated samples of PCB-contaminated upper Hudson River sediment spiked with Aroclor 1242 were incubated at 4 °C for several months. Principal components analysis of the PCBs, qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dd52ba40f00482c5a66fb8c72c6211a
https://doi.org/10.1021/es970241f
https://doi.org/10.1021/es970241f
Publikováno v:
Environmental Science & Technology. 31:3300-3307
We recently demonstrated a strategy for stimulating or priming the indigenous microorganisms to dechlorinate weathered PCBs in sediments, but the dechlorination exhibited a very narrow para-dechlorination specificity. We tested the priming activity o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3222bc2b78da61a8432d5cabdd0d7026
https://doi.org/10.1021/es970347a
https://doi.org/10.1021/es970347a
Publikováno v:
Environmental Science & Technology. 31:3308-3313
2,3,4,5,6-Pentachlorobiphenyl (23456-CB) primes a broad specificity meta-dechlorination (Process N) of Aroclor 1260 in Housatonic River sediments. We hypothesized that 23456-CB acts as an electron acceptor and could be used to selectively enrich PCB-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b68451dd888a8e4639f0c280e5383a81
https://doi.org/10.1021/es9703483
https://doi.org/10.1021/es9703483
Autor:
Harrie A. J. Govers, John R. Parsons, L.C.M. Commandeur, Ralph J. May, Donna L. Bedard, Heinrich Mokross, Walter Reineke
Publikováno v:
Biodegradation. 7:435-443
In contrast to the degradation of penta- and hexachlorobiphenyls in chemostat cultures, the metabolism of PCBs by Alcaligenes sp. JB1 was shown to be restricted to PCBs with up to four chlorine substituents in resting-cell assays. Among these, the PC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f70053a023a0e91970a1fcd3cb1fa905
https://doi.org/10.1007/bf00115290
https://doi.org/10.1007/bf00115290
Autor:
John F. Brown, Donna L. Bedard, Lynn A. Smullen, George M. Frame, Ralph J. May, James Claude Carnahan, Robert E. Wagner
Publikováno v:
Chemosphere. 33:603-623
We have determined complete polychlorinated biphenyl (PCB) congener assignments and weight percent distributions for all major (> 0.5 wt %) PCB components of Aroclors 1221, 1232, 1242, 1016, 1248, 1254, 1260, 1262 that are resolved by DB-1 (polydimet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc6c06368ba2b686b0a7f9ed145194ef
https://doi.org/10.1016/0045-6535(96)00214-7
https://doi.org/10.1016/0045-6535(96)00214-7
Autor:
Ralph J. May, William Flanagan
Publikováno v:
Environmental Science & Technology. 27:2207-2212
Although aerobic microbial biodegradation of polychlorirated biphenyls (PCBs) has been widely demonstrated in the laboratory, there is little direct evidence that this process occurs naturally in the environment. A clear indicator of naturally occurr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9133858afabb7cbeadfe73a41ea1c64
https://doi.org/10.1021/es00047a030
https://doi.org/10.1021/es00047a030
Publikováno v:
Internal Standardization and Calibration Architectures for Chemical Sensors.
An array of four acoustic wave chemical sensors has been developed and tested for recognition and quantitation of six closely related chlorinated organic vapors at low part-per- million concentrations. These vapors include PCE, TCE, VC, and DCE, cis-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfdf43cf26e8710e5d10f832971c6ef2
https://doi.org/10.1117/12.371310
https://doi.org/10.1117/12.371310
Autor:
Ralph J. May, Donna L. Bedard
Publikováno v:
Environmental Pollution. 94:243
PCB-contaminated sediments from the Housatonic River have accumulated in Woods Pond, a shallow impoundment on the river located in Lenox, MA. We used GC/ECD analysis to determine the PCB congener distributions in 181 sediment samples from 94 location
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4ea5222313e4d61cf7d6439a48f9daf
https://doi.org/10.1016/s0269-7491(97)84225-x
https://doi.org/10.1016/s0269-7491(97)84225-x
Autor:
Donna L. Bedard, James Claude Carnahan, Helen Feng, John F. Brown, Michael J. Brennan, Ralph J. May
Publikováno v:
Environmental Toxicology and Chemistry. 6:579-593
The polychlorinated biphenyls (PCBs) in sediment and/or fish samples from at least five different locations show changes in gas chromatographic (GC) peak distribution indicative of reductive dechlorination. Several different dechlorination processes,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2204b0439815b35e76ccccc14d0e1daa
https://doi.org/10.1002/etc.5620060802
https://doi.org/10.1002/etc.5620060802