Now showing items 61-70 of 85
Spectroscopic examination of linear poly(ethylenimine) containing nucleic acid pendants as polynucleotide analogs
(John Wiley & Sons, Inc., 1987-07)
The NMR spectra and UV absorptions of polynucleotide analogs with a poly(ethylenimine) (PEI) backbone containing adenine, cytosine, and hypoxanthine pendants have been examined. As has been shown in single-stranded ...
Continuous-flow enzymatic determination of creatinine with improved on-line removal of endogenous ammonia
(Elsevier, 1987)
A new continuous-flow automated enzymatic method suitable for the direct determination of creatinine in physiological samples is described. The proposed system utilizes an on-line gas predialysis unit in conjuction with a ...
Grafting of optically active nucleic acid base derivatives onto poly(vinylamine) as polynucleotide analogs Preliminary results are reported in J. Polym. Sci. Polym. Lett. Ed. , 23 , 345 (1985).
(John Wiley & Sons, Inc., 1987-01)
Polynucleotide analogs consisting of poly(vinylamine) as the backbone and optically active thymine and adenine derivatives as the pendants were synthesized. The pendants were prepared by the addition reaction of the nucleic ...
Synthesis of copoly(vinylamine-vinylalcohol) containing two kinds of asymmetric nucleic acid base derivatives as grafted pendants
(John Wiley & Sons, Inc., 1987-06)
Preparation of new model polymers of polynucleotides with poly(vinylamine-vinylalcohol) [P(Vam-Val)] backbones and different kinds of nucleic acid base derivatives as grafted pendants is described. At first, the grafting ...
Synthesis, separation, and resolution of cis - and trans -3-ethylproline
(John Wiley & Sons, Inc., 1987-12)
The synthesis, separation, and optical resolution of cis - and trans -3-ethylproline are described. Two different approaches were employed: (1) The Michael addition reaction of 2-pentenal with diethyl-N-carbobenzyloxya ...
Centrifugal distortions in molecules: An ab initio approach with application to water
(John Wiley & Sons, Inc., 1987-03-12)
Our procedure for employing analytical gradients of ab initio potential energy hypersurfaces in the description of centrifugally distorted molecules is applied to an asymmetric top, namely water. Both single determinantal ...
Network model for straining dominated particle entrapment in porous media
(Elsevier, 1987)
A network model has been developed to study and describe formation damage resulting from particle entrapment in porous media by straining or size exclusion. Unlike the previous network models, this model considers the ...
Synthesis and X-ray crystal structure of a dinuclear platinum hydride complex of tetracyanobiimidazole
(Elsevier, 1987)
Reaction of the diacid form of tetracyanobiimidazole via oxidative addition with two equivalents of Pt(PPh3)4 produces a dinuclear complex whose structure is solved by X-ray analysis. The presence of dihydride is confirmed ...
Ultraviolet-induced flashover of a plastic insulator using a pulsed excimer laser
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1987-03)
Ultraviolet-induced flashover has been observed over stressed, angled, acrylic insulators illuminated by a short (60 ns) pulse of excimer laser light at 249 nm. Flashover has been observed at ultraviolet fluences of 5–65 ...