A mathematical model is developed for the analysis of circular
cell bulkheads subjected to gravity loads of cell fill, backfill, lateral
pressure, and surcharge load using the finite element method. The
finite element circular cell model consists of axisymmetric triangular
and/or quadrilateral ring elements for soil and cylindrical shell elements...
A single cell in a 12 cell bulkhead was instrumented to observe
its behavior and confirm design assumptions during construction.
Vibrating wire strain gages were employed to measure horizontal
strains in sheetpiling webs. These were converted to interlock
force at eight locations and three elevations around the cell. The
deformed...
Independent systems theory has been used to interpret the
circular dichroism (CD) spectra in the vacuum uv of three cyclic
dimers of amino acids. First, the theory for rotational strengths is
developed in terms of degenerate and nondegenerate group functions.
All terms to first order in perturbation theory are kept....
The circular dichroism spectra of amylose, the maltose
oligomers, cellobiose, and the cycloamyloses are measured in
aqueous solution to 1640 A. Two bands are found in this region. The
long wavelength band is assigned to the ether chromophores; the short
wavelength band is assigned to the hydroxyls and further ether...
Two spectrally different species of holotryptophanase
were obtained from fluorescence and circular dichroism
measurements. One is predominant in solutions containing
certain enzyme activating monovalent cations while the
other predominates in solutions of various inhibiting monovalent
cations. Relative magnitudes of the cation sensitive
fluorescent intensity maxima or circular dichroism
maxima are...
Fluorescence polarization measurements on beef liver glutamate
dehydrogenase conjugated with pyrene butyric acid demonstrate that
the association of the enzyme is adequately described by a reversible
indefinite association with a single equilibrium constant. The data
obtained with protein concentrations up to 0.7 mg/ml in 0.05 M
potassium phosphate, pH 7....
Large-scale experiments on circular model cell bulkheads were
conducted to define the distribution of hoop stresses, deflections of
the cells, distortion of the cell fill, ultimate overturning resistance,
and the critical mode of failure. The embedment depth of the model
cells was varied to investigate the effect of embedment on...