An apparatus and procedure are described for investigating
selective adsorption from a binary vapor mixture as a function of
pressure. The technique measures both total mass adsorption and
adsorbed-phase composition.
Development of the method is outlined. Possible sources of
error are analyzed and are found to be either nonexistent or...
An instrument was developed which performs analysis of the
oxygen content of air by means of a commercial polarographic oxygen
electrode. The oxygen analyzer is part of a portable instrument
which converts the current from the oxygen electrode into a pulse
whose width is proportional to the oxygen concentration. This...
The abundance of copper was determined in four to six one-gram
specimens separated by a distance of several inches from each
of 23 large chondritic fragments (greater than 1 kg) via instrumental
neutron activation analysis and counting of the annihilation N-rays of
⁶⁴Cu. It is believed that an accuracy of...
Catalysis of the racemizationof optically active phenyl
benzenethiolsulfinate, (+)-I, by (a) methylthioacetic acid (II) and (b)
a -methylthio-m-toluic acid (III) has been investigated in aqueous
dioxane and anhydrous acetonitrile at 39.6°C. Added II did not cause
any increase in the rate of racemization of (+)-I in either solvent. In
aqueous...
The methanolysis of phosphorus trichloride coordinated to nickel
(0) has been studied. Free phosphorus trichloride reacts with methanol
to give dimethyl hydrogen phosphonate, methyl chloride, and hydrogen
chloride. The reaction involves a rearrangement on phosphorus using
the lone pair, in which the coordination number increases from three
to four. In...
A procedure is described for the optimization of a previously
described continuous analysis adaptation of the Pearl-Benson or
nitroso method for estimation of spent sulfite liquor (SSL) or ligno-sulfonates.
The optimized procedure has a response time of 6.5 minutes. In order to monitor samples whose SSL concentration is
between 0...
Phospholipids and cerebrosides of the normal chick sciatic
nerve were extracted by Folch procedures and separated with silica
gel thin-layer chromatography using various chloroform-methanol
solvents. The subsequent chemical assays were expressed as a function
of the developmental stages of the chick from 15 days of incubation
to 7 days after...
A simultaneous direct spectrophotometric method for the determination
of barium and strontium using Sulfonazo III has been developed
making use of the chelons EGTA and CDTA at controlled pH
values.
An absorbance study of the barium and strontium complexes of
Sulfonazo III revealed that there is no pH sensitivity of...
Six organoclay complexes have been studied in terms of their
selective adsorption from binary solutions of methanol and toluene.
Analyses are based on differential refractometry methods. The
isotherms were of the usual "S" type. The crossover points reveal
trends in the organophilic nature of the interlaminar surfaces in
these clay...
Biochemical studies of phenylmercuric acetate (PMA) and
mercuric acetate toxicity in rats carried out during this investigation
were (1) the metabolism of ²⁰³Hg(Ac)₂ and ²⁰³Hg-PMA within kidney and liver tissues following oral
ingestion,
(2) the effect on some
soluble enzyme activities and determinations of ²⁰³Hg binding in the
enzyme fractions,...
A study of the relative rates of benzylic hydrogen abstractions
from a series of meta and para substituted neopentylbenzenes by the
bromine radical and trichloromethyl radical at 70°C has been carried
out. Application of the Hammett equation yields p values of -0.75
for the bromine atom and -0.94 for the...
