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Bloomfield mechanism

My expectations were realized t-butyl hypochlorite proved to be a most useful allyllc halogenatlng agent, and a convenient starting material for Investigating alkoxy radical chemistry (16). With that done, a bit later I was able to participate In discrediting the Bloomfield mechanism for NBS (17), and Jim MeGuineas In my group was able to show that chlorine atom chains could be observed with t-butyl hypochlorite as well (18). [Pg.11]

Another mechanism, involving addition of the ketyl to another molecule of ester (rather than a dimerization of two ketyl radicals), in which a diketone is not an intermediate, has been proposed Bloomfield, J.J. Owsley, D.C. Ainsworth, C. Robertson, R.E. J. Org. Chem., 1975, 40, 393. [Pg.1602]

Bloomfield S.F. Arthur M. (1994) Mechanisms of inactivation and resistance of spores to chemical... [Pg.277]

Probably the most familiar radical reactions leading to 1,2-D systems are the so called acyloin condensation and the different variants of the "pinacol condensation". Both types of condensation involve an electron-transfer from a metal atom to a carbonyl compound (whether an ester or an aldehyde or a ketone) to give a radical anion which either dimerises directly, if the concentration of the species is very high, or more generally it reacts with the starting neutral carbonyl compound and then a second electron is transferred from the metal to the radical dimer species (for an alternative mechanism of the acyloin condensation, see Bloomfield, 1975 [29]). [Pg.144]

Bloomfield C. 1951. Experiments on the mechanism of gley formation. Journal of Soil Science 2 196-211. [Pg.261]

Bloomfield, V.A. (1991) Condensation of DNA by multivalent cations consideration on mechanism. Biopolymers, 31, 1471-1481. [Pg.140]

Matulis, D., Rouzina, I. and Bloomfield, V.A. (2000) Thermodynamics of DNA binding and condensation isothermal titration calorimetry and electrostatic mechanism. J. Mol. Biol., 296, 1053-1063. [Pg.144]

Speciation in solution is considered a major factor in the mobilisation and leaching of metal cations (DeKoninck, 1980 Bloomfield, 1981 Stevenson and Fitch, 1986). Complexation increases the total soluble concentration of a metal and hence increases its potential to be leached. Organic ligands (e.g. humate, ful-vate, citrate, polyphenols) are the major complexers involved in this mechanism, but they are effective only if the soluble organic complex does not become saturated and precipitate (DeKoninck, 1980). [Pg.259]

According to Bloomfield and Mead (1974), The ultimate goal of all workers on casein is to reconstitute micelles with native properties from the separated constituents of skim-milk. This assertion reflects the large number of studies in the literature on the precipitation and association properties of the caseins.There are, however, legitimate scientific goals in this kind of work other than the creation of artificial casein micelles, such as the elucidation of the mechanisms by which phosphoproteins profoundly influence the nucleation and growth of calcium phosphate phases. [Pg.103]

Farmer, E.H., Bloomfield, G.F., Sundralingam, A., Sutton, D.A. 1942. The course and mechanism of auto-oxidation reactions in olefinic and polyolefinic substances, including rubber. [Pg.589]

Some of the natural extensions of this classical approach include the treatment of mechanisms with multiple intermediate complexes and near-equilibrium conditions (e.g., Peller and Alberty, 1959). Enzyme-catalyzed reactions that involve two substrates and two products are among the most common mechanisms found in biochemistry (about 90% of all enzymatic reactions according to Webb, 1963). It is not surprising, then, that this class of mechanisms also has received a great deal of attention (e.g., Dalziel, 1957,1969 Peller and Alberty, 1959 Bloomfield et al., 1962a,b Cleland, 1963a,b,c). This class includes mechanisms in which reactant molecules enter and exit a single pathway in fixed order and mechanisms with parallel pathways in which reactant molecules enter and exit in a random order (Cleland, 1970). [Pg.106]

SM Bloomfield. Methods of assessing antimicrobial activity. In SP Denyer, WB Hugo, eds. Mechanism of Action of Chemical Biocides Their Study and Exploitation. Cambridge, MA Blackwell Scientific Publications, Inc., 1991, pp. 1-22. [Pg.360]

T. Wagenknecht and V. A. Bloomfield, Equilibrium mechanisms of length regulation in linear protein aggregates, Biopolymers 14, 2297 (1975). [Pg.250]

Oxenham H, Bloomfield P, Wheatly DJ, et al. Twenty year comparison of a Bjork-ShUey mechanical heart valve with porcine bioprostheses. Heart 2003 89 715-21. [Pg.37]

Since a simple substitution reaction should not reduce unsaturation this suggests that at least one rearrangement process is occurring such as cyclization. A polar mechanism for the early cyclization part of stage one has been proposed as follows (Makowski, 1%9 based on Bloomfield, 1944). [Pg.173]

Thus destruction of red cells in pernicious anemia is not due solely to an inherent abnormality in the red cells there must also be an extra-corpuscular mechanism. The existence of a hemolytic agent in the blood of patients with pernicious anemia is discussed by Paschkis and Taylor (1934), Dock (1938), and Bloomfield (1944). [Pg.142]

Bloomfield, C. (1951). Experiments on the mechanism ofgley formation.7.5a. 2,196-211. Bobritskaya, M. A. (1950). Absorption of mineral elements by lithophyllic vegetation on massive crystalline rocks. Tr. Pochv. Inst., Akad. Nauk SSSR 34, 5-27. [Pg.244]

Desaturation of fatty acids by this mechanism has been localized in microsomes (Bloomfield and Bloch, 1960 Marsh and James, 1962 Nagai and Bloch, 1965). [Pg.77]

A more direct pathway for unsaturated fatty acid biosynthesis was first demonstrated in Saccharomyces cerevisiae by Bloomfield and Bloch (1960). Their studies revealed that the formation of unsaturated fatty acid CoA esters could proceed by a desaturation of the corresponding long-chain fatty acid CoA ester, as shown in Fig. 7. The particulate enzyme involved was found to have characteristics typical of mixed function oxidases, requiring molecular oxygen and ITNH. In contrast, the p,y dehydration mechanism outlined above is essentially... [Pg.189]

Bloomfield, P. et al.. Twelve-year comparison of a Bjork-Shiley mechanical heart valve with porcine hioprostheses. N Engl f Med, 1991. 324(9) p. 573-9. [Pg.1549]


See other pages where Bloomfield mechanism is mentioned: [Pg.11]    [Pg.11]    [Pg.438]    [Pg.204]    [Pg.133]    [Pg.306]    [Pg.73]    [Pg.116]    [Pg.531]    [Pg.178]    [Pg.204]    [Pg.296]    [Pg.193]    [Pg.85]    [Pg.79]    [Pg.662]    [Pg.281]    [Pg.295]   
See also in sourсe #XX -- [ Pg.11 ]




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