High purity single crystals of zirconium were produced and
mechanically strained in the temperature range from 4.2°K to 293°K.
The crystals were produced by thermal treatment with a specially
constructed electron beam zone refiner which provided the abrupt
temperature gradient necessary for crystal growth. Specimens were
electrolytically machined to have...
A preparative method for a new compound n-octadecylcycloazadi-boron (CAB), in high yield has been developed. CAB was isolated as
an intermediate in the octadecylamine-catalyzed hydrolysis of pentaborane.
The most probable structure of CAB can be regarded as a
derivative of the three membered ring cycloazadiboron with a
n-octadecyl group substituted...
Solid solution alloying was employed in an attempt to produce some
relatively ductile form of beryllium. If the c/a ratio could be significantly
altered, it was felt new or different slip systems could be activated. The
following elements were selected on the basis of atomic size, melting point,
crystal structure...
At liquid nitrogen temperature the spectra of sublimed
films of NH₄NCS, both as phase I (the usual form stable at
room temperature) and phase II (the low temperature form),
exhibit detail usually reserved for gases at low pressures.
In both phases the symmetry of ammonium ion has degenerated
from tetrahedral...
The zirconium-chromium phase diagram was investigated in the
region between 40% and 85% chromium. The ZrCr₂ intermetallic
compound which has been the source of some controversy was especially
considered. It was found that ZrCr₂ transforms from the low
temperature C-15 (MgCu₂, FCC) structure to the high temperature
C-14 (MgZn₂, HCP)...
The binding of fifteen hydrocarbons to native DNA
has been investigated. The hydrocarbons were chosen to
test a size criterion for hydrocarbon - DNA complexes. It
has been found that hydrocarbons, which are small enough
to intercalate between the base pairs of a distorted Watson -
Crick model of DNA,...