Now showing items 1-10 of 52
Volatile combustion products of polycarbonate and polysulfone
(Wiley Subscription Services, Inc., A Wiley Company, 1972-04)
Thermal analysis of polycarbonate and polysulfone has shown each plastic to undergo a two-step decomposition, the first step involving production of high-boiling chain scission and volatile products, the second resulting, ...
Soluble cytochrome b5 from human erythrocytes
(Elsevier, 1972-07-12)
1. A hemeprotein with properties similar to microsomal cytochrome b5 has been detected in the supernatant fraction of hemolysates of human, beef, and rabbit erythrocytes. A method has been developed for determining the ...
Spectral variational principle for Green's functions
(Springer-Verlag, 1972-12)
For a suitable approximation ( q, q′, τ ) to the Dirac-Feynman Green's function of a quantummechanical system, the parameter is defined, where ℒ≡ i ∂/∂τ−ℋ. It is shown that Δ ≧0 and Δ →0 as K→K , the exact Green's function, ...
D-Glucuronic acid: A non-inhibitor of the concanavalin A system
(Elsevier, 1972-06-22)
D-Glucuronic acid is demonstrated not to inhibit the concanavalin A system; previous claims to the contrary are shown to be due to a pH effect. Concanavalin A does not precipitate biopolymers containing nonreducing, terminal ...
Trimethylstannyl-2,4-cycloheptadiene: A fluxional molecule
(Elsevier, 1972-05-16)
Trimethylstannyl-2,4-cycloheptadiene (II) was synthesized and shown to be fluxional on the NMR time scale. The activation energy for the [1,5] trimethyltin migration is estimated to be ca. 18 kcal/mole. This value is ...
Soluble cytochrome b5 reductase from human erythrocytes
(Elsevier, 1972-07-12)
1. An enzyme that catalyzes the reduction of erythrocyte cytochrome b5 has been isolated from the supernatant fraction of erythrocyte hemolysates by chromatography on DEAE-cellulose, Amberlite CG-50, and Bio-Gel P-60.2. ...
Electron paramagnetic resonance studies on nitrogenase : I. The properties of molybdoferredoxin and azoferredoxin
(Elsevier, 1972-11)
Both molybdoferredoxin and azoferredoxin exhibit EPR signals. Reduced azoferredoxin has a g = 1.94 type signal characteristic of nonheme iron proteins. Reduced molybdoferredoxin has EPR signals with g-values of 2.01, 3.78 ...
The optimal control of a periodic adsorber: Part I. Experiment
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1972-11)
Cyclic pressure variations in a fixed bed adsorber can cause significant separation of gaseous mixtures. Feed pressure changes are the driving force in this parametric pumping process. The optimal feed sequence is maximum ...
The optimal control of a periodic adsorber: Part II. Theory
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1972-11)
The fixed bed binary gas adsorber, when alternately fed and exhausted at one end, produces a purified product from the other end. Coupled partial differential equations in pressure and composition, representing total mass ...