Zobrazeno 1 - 10
of 12
pro vyhledávání: '"M D, Smedley"'
Autor:
John D. Weber, M. D. Smedley
Publikováno v:
Journal of AOAC INTERNATIONAL. 76:725-729
Seven laboratories participated in a collaborative study of a liquid chromatographic (LC) method for determination of sulfamethazine (SMZ) residues in raw milk that were previously frozen. The milk is extracted with chloroform, the chloroform is evap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acdde64c4b0f4aac710e679cae16463f
https://doi.org/10.1093/jaoac/76.4.725
https://doi.org/10.1093/jaoac/76.4.725
Publikováno v:
Communications in Soil Science and Plant Analysis. 22:1797-1804
Dehydrogenase enzymes significantly mediate biological oxidation of organic compounds in soil. Dehydrogenase activities were determined in surface and subsurface horizons of 14 major hill land soils of the Appalachian Region. Soil samples were stored
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9ff827998073ad40543ecd65ba1521a
https://doi.org/10.1080/00103629109368536
https://doi.org/10.1080/00103629109368536
Publikováno v:
Communications in Soil Science and Plant Analysis. 22:1537-1545
The pyrophosphatase (PPi) enzyme catalyzes the hydrolysis of pyrophosphate to orthophosphate. The PPi activity was determined in 14 hill‐land soils of the Appalachian Region. The top two horizons from each soil were sampled and stored in a field‐
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03a4b81e50d426916d0bd75f7e85993b
https://doi.org/10.1080/00103629109368514
https://doi.org/10.1080/00103629109368514
Publikováno v:
Root Demographics and Their Efficiencies in Sustainable Agriculture, Grasslands and Forest Ecosystems ISBN: 9789401062183
No tillage (NT) has an advantage over conventional tillage (CT) in hilly lands of the Appalachian region of the Eastern U.S. because it reduces soil erosion and lowers energy input. Field experiments were conducted for three years (at an elevation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9c5036978805cb74490bfeb7e139af9
https://doi.org/10.1007/978-94-011-5270-9_26
https://doi.org/10.1007/978-94-011-5270-9_26
Autor:
M D, Smedley
Publikováno v:
Journal of AOAC International. 77(5)
A collaborative study involving 8 laboratories was conducted on the determination of 8 sulfonamide residues in raw bovine milk using a liquid chromatographic (LC) method. The sulfonamides are extracted with chloroform-acetone, the organic phase is ev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::65ebd78d466fa474506c547f827d2620
https://pubmed.ncbi.nlm.nih.gov/7950413
https://pubmed.ncbi.nlm.nih.gov/7950413
Autor:
J D, Weber, M D, Smedley
Publikováno v:
Journal of AOAC International. 76(4)
Seven laboratories participated in a collaborative study of a liquid chromatographic (LC) method for determination of sulfamethazine (SMZ) residues in raw milk that were previously frozen. The milk is extracted with chloroform, the chloroform is evap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::433f211d5b8d389aa1d43f6dad84f5ee
https://pubmed.ncbi.nlm.nih.gov/8374322
https://pubmed.ncbi.nlm.nih.gov/8374322
Autor:
M D, Smedley, J D, Weber
Publikováno v:
Journal - Association of Official Analytical Chemists. 73(6)
A liquid chromatographic method has been developed for simultaneous determination of residues of 10 sulfonamide drugs at 10 ppb and above in raw bovine milk. The method is based on a chloroform-acetone extraction, evaporation of organic phase, dissol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::f916caea9acd3cc7acd0c1951f2963d8
https://pubmed.ncbi.nlm.nih.gov/2289918
https://pubmed.ncbi.nlm.nih.gov/2289918
Publikováno v:
Journal of Plant Nutrition. 10:1131-1137
Climatically controlled growth rooms were used to evaluate performance of 23 red clover cultivars in a nutrient culture system at 5 levels of Al (0, 25, 50, 75 and 100 μM). The shoot and root growth of all the cultivars was reduced by Al. Considerab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d16b3f88dfc8e9f4c7bef11d2d1982e0
https://doi.org/10.1080/01904168709363641
https://doi.org/10.1080/01904168709363641
Publikováno v:
Communications in Soil Science and Plant Analysis. 16:1079-1093
Six legume species and several varieties within the species were grown in a greenhouse pot experiment using the Bt horizon of a Lily (Typic Hapludult) soil. Lime treatments were 0 and 2.2 g Ca(OH)2/kg soil. Liming increased the soil pH from 4.6 to 6.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::427e01c25bce86ae582294cab7559c71
https://doi.org/10.1080/00103628509367667
https://doi.org/10.1080/00103628509367667
Publikováno v:
Soil Science Society of America Journal. 52:1612-1616
Acid phosphatase (AP) activity was determined in 14 hill land soils of the Appalachian region. Soil samples were obtained from surface (A or Ap) and subsurface (E, BA, Bt, or Bw) horizons during spring, and subsamples were stored field-moist at 4 °C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d8f5ec55c21310201e7d6bc566383c9
https://doi.org/10.2136/sssaj1988.03615995005200060018x
https://doi.org/10.2136/sssaj1988.03615995005200060018x