Zobrazeno 1 - 10
of 11
pro vyhledávání: '"John S. Manka"'
Publikováno v:
Tetrahedron Letters. 31:5873-5876
The unionized form of tetraphenylporphine complexes alkali metal salts in acetone with association constants ranging from 6.0 to 60 M −1 .
Autor:
John S. Manka
Publikováno v:
SAE Technical Paper Series.
Publikováno v:
SAE Technical Paper Series.
Autor:
Kim L. Ziegler, John S. Manka
Publikováno v:
All Days.
Crude oil producers have used pour point depressants with great success for several decades. However, chemical wax control packages can be plagued by crude oil specificity, large package treat rates, and waxy components that can be hard to apply. Thi
Autor:
John S. Manka, Kim L. Ziegler
Publikováno v:
SAE Technical Paper Series.
Publikováno v:
All Days.
Crude oil producers have used pour point depressants and wax deposition inhibitors with great success for several decades. Unfortunately, undiluted pour point depressants and wax deposition inhibitors are waxy materials that are often solids at the a
Autor:
John S. Manka, David S. Lawrence
Publikováno v:
Journal of the American Chemical Society. 112:2440-2442
Heme-dependent proteins participate in a diverse array of biochemical phenomena including oxygen transport (hemoglobin) and activation (cytochrome P-450 enzymes). The proteinoid appendage of these species serves as a steric impediments that precludes
Autor:
Sopko Thomas M, John S. Manka
Publikováno v:
SAE Technical Paper Series.
Autor:
David S. Lawrence, John S. Manka
Publikováno v:
Tetrahedron Letters. 30:7341-7344
Heptakis(2,6-di-O-methyl)-β-cyclodextrin interacts with 5,15-diphenylporphine to produce a 2:1 complex in dimethyl sulfoxide. This complex possesses a hydrophobic groove that circumscribes the metal binding site of the porphyrin moiety.
Autor:
David S. Lawrence, John S. Manka
Publikováno v:
Tetrahedron Letters. 30:6989-6992
The condensation of dipyrrylmethane with a variety of aromatic aldehydes furnishes, upon oxidation with chloranil, 5,15-diarylporphyrins in high yield (73–92%).