Now showing items 81-90 of 179
Direct chemical analysis of UV laser ablation products of organic polymers by using selective ion monitoring mode in gas chromatography/mass spectrometry
(Elsevier, 1994-02)
Trace quantitites of laser ablated organic polymers were analyzed by using commercial capillary column gas chromatography / mass spectrometry; the instrument was modified so that the laser ablation products could be ...
Nicotine may relieve symptoms of Parkinson's disease
(Springer-Verlag, 1994-09)
Two elderly patients with Parkinson's disease were treated with nicotine gum and patch. Reliable changes in symptomatology were noted, using a single-subject, placebo-control reversal design. Improvement was associated ...
SCNN1, an Epithelial Cell Sodium Channel Gene in the Conserved Linkage Group on Mouse Chromosome 6 and Human Chromosome 12
(Elsevier, 1994-11-01)
SCNN1, a gene encoding a nonvoltage-gated sodium channel, was detected using a rat colon cDNA probe with homology to Caenorhabditis elegans degenerin genes. Human SCNN1 was assigned to chromosome 12 using the NIGMS hybrid ...
Immunoglobulin G directed against toxins A and B of Clostridium difficile in the general population and patients with antibiotic-associated diarrhea
(Elsevier, 1994-04)
Serum immunoglobulin G (IgG) class antibodies directed against toxins A and B of Clostridium difficile were studied using an enzyme-linked immunosorbent assay and a serum-neutralizing assay based on the MRC-5 tissue ...
c-Myc Does Not Require Max for Transcriptional Activity in PC-12 Cells
(Elsevier, 1994-06)
The c-Myc proto-oncogene is a basic helix-loop-helix leucine zipper (b/HLH/LZ) protein that participates in cellular growth and differentiation. The expression of cMyc mRNA is rapidly induced by nerve growth factor (NGF) ...
Generation and cycloaddition of heteroatom-substituted 2-azaallyl anions with alkenes and alkynes. Synthesis of 1-pyrrolines and pyrroles
(Elsevier, 1994-04-25)
Imidates and thioimidates 1 bearing an N-(1-tri-n-butylstannyl)alkyl group (e.g., 7-9) were transmetalated with n-BuLi to generate heteroatom-substituted 2-azaallyl anions 2. These anions underwent [2[pi]s+4[pi]s] ...
Phase stability and structural properties of Ni7 +/- [delta]S6 and Ni9S8 Heat capacity and thermodynamic properties of Ni7S6 at temperatures from 5 K to 970 K and of Ni9S8 from 5 K to 673 K
(Elsevier, 1994-09)
Two stable solid phases with composition in the range from (45 to 48) moles per cent of S exist for (nickel + sulfur): Ni9S8 which disproportionates to Ni1 - [delta]S and Ni7 +/- [delta]S6 above T = (709 +/- 5) K, and Ni7 ...
Cell-Specific Kinetics and Efficiency of Herpes Simplex Virus Type 1 Entry Are Determined by Two Distinct Phases of Attachment
(Elsevier, 1994-02-01)
We previously provided evidence for a model of herpes simplex virus type 1 (HSV-1) entry by a cascade of interactions between components of the virion envelope and cellular plasma membrane (Fuller and Lee, 1992, J. Virol. ...
Fas ligation triggers apoptosis in macrophages but not endothelial cells
(WILEY-VCH Verlag GmbH, 1994-11)
The reticuloendothelial system includes macrophages and endothelial cells. These cells are produced and destroyed in vivo with a precision that implies the existence of homeostatic mechanisms. The stimuli for endothelial ...
The design and performance of an ion trap storage--reflectron time-of-flight mass spectrometer
(Elsevier, 1994-02-24)
The design and performance of an ion trap storage--reflectron time-of-flight mass spectrometer (IT--RETOF MS) combination have been explored for detection of ions generated from both internal and external ionization sources. ...