Now showing items 1-10 of 172
Experimental investigation of the resistance in thin superconducting films of niobium-germanium
(American Institute of Physics, 1980-01-15)
We discuss the resistance of thin superconducting films of amorphous niobium-germanium below the BCS thermodynamic transition temperature as determined by measurements of the heat capacity. This resistance is shown to be ...
Radiometric scene normalization using pseudoinvariant features
(Elsevier Science B.V., Amsterdam, 1988-10)
Synthesis and molecular structure of the eight-coordinate complex bis( 4-amino-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium( IV), a new reagent for preparing coordination polymers
(The American Chemical Society: Inorganic Chemistry, 1987-12-30)
The precursor complex bis(4-nitro-N,N’-disalicylidene- 1,2-phenylenediaminato)zirconium(IV);Zr(ndsp)2, was synthesized from the appropriate Schiff-base ligand and zirconium tetra-n-butoxide butanol complex (2:1, respectively) ...
A soluble linear Schiff-base coordination polymer containing eight-coordinate zirconium (IV)
(The American Chemical Society: Macromolecules, 1985-07)
The first soluble linear Schiff-base heavy-metal coordination polymer has been synthesized via the condensation of 1,2,4,5-tetraaminobenzene and tetrakis(salicylaldehydato)zirconium(IV) in dry dimethyl sulfoxide. The (N, ...
The ecological cost of morphological specialization: feeding by a fossorial lizard
(Springer: Oecologia, 1987-08)
Head size and shape of reptiles may reflect selection for multiple uses. For example, sexual selection for large head size may enhance feeding efficiency. In contrast, morphological characteristics of the heads of fossorial ...
Male parental care and its adaptive significance in a neotropical frog
(Elsevier: Animal Behaviour, 1984-05)
In the Puerto Rican frog Eleutherodactylus coqui, parental care is performed exclusively by males, and consists of attending the eggs and hatchlings at a terrestrial oviposition site. The two major behavioural components ...
Diploid and tetraploid grey treefrogs (Hyla chrysoscelis and Hyla versicolor) have similar metabolic rates
(Elsevier: Comparative Biology and Physiology A, 1985)
We measured oxygen consumption of the diploid frog Hyla chrysoscelis and its recently evolved tetraploid cryptic species Hyla versicolor at rest and during forced locomotory exercise. We also measured whole-body lactic ...
Molecular genetic analysis of tumors in von recklinghausen neurofibromatosis: Loss of heterozygosity for chromosome 17
(Wiley: Genes, Chromosomes and Cancer, 1989-09)
The most common inherited syndrome in man predisposing to neoplasia is neurofibromatosis-1 (von Recklinghausen disease) (NF1). We investigated the hypothesis that affected individuals carry a single inactive allele at the ...
An azophenolic colorimetric reagent for use in enzyme-linked immunosorbent assays.
(Elsevier: Analytical Biochemistry, 1987-08-01)
A colorimetric reagent, 4-(4'-nitro-2'-methylsulfonylphenylazo)phenyl phosphate (NMPP), has been shown to be an effective substrate of alkaline phosphatase. NMPP and p-nitrophenyl phosphate were applied in comparative ...
The polymerization of phenylacetylene in carbon tetrachloride in the presence of light-activated W(CO)6
(Wiley: Journal of Polymer Science Part A: Polymer Chemistry, 1989-12)
A study of the apparent reaction rate constants of phenylacetylene polymerized in CCl4 in the presence of light-activated W(CO)6 and of the molecular weight of the resulting polymer indicates that the propagating centers ...