Results 311 to 320 of about 496,624 (354)

“Oscillating” Metallocene Catalysts:  What Stops the Oscillation?

Journal of the American Chemical Society, 2003
The 150 MHz (13)C NMR microstructural analysis of polypropylene samples produced with two representative "oscillating" metallocene catalysts of largely different steric hindrance, namely [(2-(3,5-di-tert-butyl-4-methoxyphenyl)indenyl)(2)ZrP](+) and [(2-phenylindenyl)(2)ZrP](+) (P = polymeryl), and the implications on the origin of the stereocontrol are
BUSICO, VINCENZO, Van Axel Castelli Valeria, Aprea Paola, CIPULLO, ROBERTA, Segre Annalaura, TALARICO, GIOVANNI, VACATELLO, MICHELE   +6 more
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“Oscillating” Metallocene Catalysts: How Do They Oscillate?

Angewandte Chemie International Edition, 2002
Based on the results of a series of propylene polymns. using oscillating metallocene catalysts of type [(2-Ar-indenyl)2ZrCl2] (Ar = C6H5 or 3,5-(t-Bu)2-4-MeO-C6H2) with various cocatalysts (MAO, TIBAl), the oscillating behavior of the zirconocenes is discussed with respect to the rac/meso stereochem. outcome of the obtained polypropylenes.
BUSICO, VINCENZO, CIPULLO, ROBERTA, Kretschmer Winfried P, TALARICO, GIOVANNI, VACATELLO, MICHELE, Van Axel Castelli Valeria   +5 more
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Oscillation frequency in CML and ESCL ring oscillators

IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2001
In this paper a model to accurately evaluate even in a pencil-and-paper manner the oscillation frequency of a ring oscillator made up by a CML or ESCL differential gate is proposed. The model allows us to simply estimate the oscillation frequency changes due both to the bias current change and to process tolerances.
ALIOTO M, PALUMBO, Gaetano
openaire   +2 more sources

Simultaneous Oscillations in Oscillators

Transactions of the IRE Professional Group on Circuit Theory, 1954
An oscillator with two degrees of freedom can, under certain conditions, oscillate simultaneously at two different frequencies. The ratio of the two frequencies may be rational (synchronous oscillations) or irrational (asynchronous oscillations). The conditions necessary for 'simultaneous oscillations are discussed for these two cases.
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A nonholonomic oscillator

Reports on Mathematical Physics, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cushman, Richard, Śniatycki, Jȩdrzej
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Oscillations in an Ensemble of Noninteracting Oscillators

1989
The two most important cases in application are the almost trivial one in which all the oscillators are identical and the much more interesting one when the parameters of the oscillators are scattered either in frequency or in damping. The consideration of the behavior of an ensemble of identical noninteracting oscillators is the main subject of the ...
M. I. Rabinovich, D. I. Trubetskov
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Oscillator

2022
BINET VINCENT, CUENCA MICHEL, GIRARDEAU LUDOVIC   +2 more
openaire   +5 more sources

Enhanced DNA Repair Through Droplet Formation and p53 Oscillations

Cell, 2022
Mogens H Jensen, Sheng-Hong Chen
exaly  

OSCILLATIONS

1985
A.L. Stanford, J.M. Tanner
openaire   +1 more source

Oscillations

Proceedings of the 2016 CHI Conference Extended Abstracts on Human Factors in Computing Systems, 2016
openaire   +1 more source