Now showing items 71-80 of 94
Model hydrodesulfurization catalysts: Solid state synthesis and characterization of iron containing molybdenum sulphide
(Elsevier, 1989)
Model catalysts for hydrodesulfurization were synthesized via solid state reactions of elemental sulfur with metallic iron and molybdenum powders. The starting materials had a general stoichiometry of Fe2[alpha]Mo1-[alpha]S2 ...
Vibrational spectra and structure of the heptahydrodiborate ion, [B2H7]- in glycol ethers
(Elsevier, 1989)
The i.r. and Raman spectra of the heptahydroborate ion, [B2H7]-, and its deuterated derivative, [B2D7]-, have been obtained in solution and assignments have been made of the observed bands. The data are interpreted as ...
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 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 ...
Lipoxygenase isoenzymes: A spectroscopic and structural characterization of soybean seed enzymes
(Elsevier, 1989-02-15)
Applying recent developments in protein purification techniques, a number of lipoxygenase isoenzymes have been isolated in satisfactory quantities for a detailed physical and structural characterization. Four seed isoenzymes ...
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. ...
Pathophysiological features of the pulsatile secretion of biologically active luteinizing hormone in man
(Elsevier, 1989-10)
The development of an in vitro bioassay of high specificity, sensitivity and precision for the measurement of low circulating concentrations of biologically active glycoprotein hormones has offered exciting new insights ...
Synthesis of feedforward/state feedback controllers for nonlinear processes
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1989-10)
A systematic method for synthesizing feedforward/state feedback controllers for a broad class of SISO nonlinear systems with measurable disturbances is presented. Depending on the structural characteristics of the system, ...
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 ...