Now showing items 61-70 of 76
Assembly of the gephyrotoxin ring system via a [4+1] approach to 3-pyrrolines
(Elsevier, 1989)
Heating azidodienes 19 at 70[deg]C produced the tricyclic 3-pyrrolines 20 and 21 in one operation. The diastereoselectivity of this process was examined, and found to be controlled by the conformation of the cyclization ...
The sinusoidal crack
(Elsevier, 1989)
The effects of mixed mode and partial crack closure due to curvature are studied by a simple sinusoidal crack model. For a slightly curved crack under applied shear, a small mode I stress intensity factor is obtained. ...
The effects of heavy metal cations and sulfhydryl reagents on degranulation from digitonin-permeabilized neutrophils
(Elsevier, 1989-03-06)
Digitonin-permeabilized neutrophils were exposed to micromolar levels of a variety of heavy metal cations and sulfhydryl oxidants to gain insight into the potential biochemical mechanisms underlying neutrophil degranulation. ...
On the stability of coagulation--fragmentation population balances
(Elsevier, 1989-11)
When coagulation and fragmentation both occur in a system, the competition between these processes may lead to a steady-state size distribution. We consider some specific moment solutions to a generalized coagulation-fragmentation ...
Separate and shared lysosomal transport of branched and aromatic dipolar amino acids
(Elsevier, 1989-12-28)
Transport systems analogous to the T and L carriers for aromatic and bulky dipolar amino acids in plasma membranes have been characterized in the membranes of intact lysosomes isolated from human fetal skin fibroblasts. ...
ZrTe5 and HfTe5: The heat capacity and derived thermophysical properties from 6 to 350 K
(Elsevier, 1989-07)
The heat capacities of ZrTe5 and HfTe5 have been measured by adiabatic shield calorimetry from 6 to 350 K on samples carefully shielded to minimize the contact between the sample and oxygen during all stages of preparation ...
FeAs: Heat capacity, enthalpy increments, other thermodynamic properties from 5 to 1350 K, and magnetic transition
(Elsevier, 1989-04)
The heat capacity of iron monoarsenide has been determined by adiabatic calorimetry from 5 to 1030 K and by drop calorimetry relative to 298.15 K over the range 875 to 1350 K. A small [lambda]-type transition is observed ...
An inorganic functional group approach to the systematic synthesis and reactivity studies of binuclear Mo/S and Mo/S/O complexes
(Elsevier, 1989)
A number of general reactions, based on molybdenum-coordinated sulphido or polysulphido ligands, can account for the synthesis of many members of the [Mo2V(S)n(S2)6-n]2-, [Mo2V(O)(S)n(S2)5-n]2- and [Mo2V(O)2(S)n(S2)4-n]2- ...
RO-Vibrational state densities based on spectroscopic data for non-separable systems
(Elsevier, 1989-07-21)
A Monte Carlo procedure for calculating the density of states is described. The method is based on an expansion of the eigenstate energies as term values, and coupling among vibrations and rotations is explicitly included. ...