Overdrive
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Mouse embryonic stem cells: the establishment of the system to produce differentiated cell types in vitro
During the last few years, embryonic stem (ES) cells have been a new tool in cell biology which is very promising for the scientific community to develop new cell therapies. ES cells are the only cell type that can differentiate into derivates of the three primary germ layers, not only in vivo but also, and most important, in vitro. This so-called pluripoten
Publicado em: 2010
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2. Analise da distorção musical de guitarras eletricas / Analysis of the musical distorsion of electric guitars
Existem diversos problemas ligados à análise de sinais musicais que podem se beneficiar de um conhecimento mais detalhado da estrutura dos sinais gerados pelos diferentes instrumentos. Entre eles se destaca a compressão de sinais baseada em áudio estruturado, onde o codificador determina a partir de um sinal parâmetros para reproduzí-lo com um sintetiz
Publicado em: 2007
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3. Role of the overdrive sequence in T-DNA border cleavage in Agrobacterium.
The T-DNA of the Ti plasmid of Agrobacterium is flanked by 25-base-pair imperfect direct repeats that are required in cis for transfer to the genome of the plant host. Another sequence, designated overdrive, is located adjacent to the right-border repeats and functions in cis to enhance tumor formation. We have examined the effect of the overdrive sequence o
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4. Stimulation of Agrobacterium tumefaciens T-DNA transfer by overdrive depends on a flanking sequence but not on helical position with respect to the border repeat.
T-DNA transfer by Agrobacterium tumefaciens depends on the right border repeat of the T-DNA and is greatly stimulated by overdrive, an adjacent sequence. We report that the function of overdrive does not depend on helical position with respect to the border repeat. A synthetic 24-bp overdrive and a 12-bp region containing a fully conserved 8-bp core overdriv
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5. Overdrive is a T-region transfer enhancer which stimulates T-strand production in Agrobacterium tumefaciens.
Introduction of a left or right synthetic border repeat together with the overdrive sequence in an octopine Ti-plasmid deletion mutant, lacking the right border, resulted in the complete restoration of the oncogenicity of the mutant strain. However introduction of a border repeat without the overdrive, only restored oncogenicity partially. The overdrive sequ
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6. Relation between Na+-K+ pump, Na+ activity and force in strophanthidin inotropy in sheep cardiac Purkinje fibres.
1. The effects of different concentrations of strophanthidin on intracellular sodium activity (aiNa), membrane potential and contractile force have been studied in cardiac sheep Purkinje fibres under conditions (overdrive) that stimulate Na+-K+ pump activity. 2. In fibres driven at 1 Hz, a 5 min overdrive at 2 Hz in the steady state increased force by +74.2%
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7. The Agrobacterium tumefaciens virC1 gene product binds to overdrive, a T-DNA transfer enhancer.
In Agrobacterium tumefaciens, a cis-active 24-base-pair sequence adjacent to the right border of the T-DNA, called overdrive, stimulates tumor formation by increasing the level of T-DNA processing. Recent results from our laboratory have suggested that the virC operon which enhances T-DNA processing probably does so because the VirC1 protein interacts with o
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8. Overdrive suppression of implanted pacemakers in patients with AV block.
Patients being permanently paced for symptomatic AV block were studied by overdrive suppression of the QRS-inhibited pacemaker, in order to observe the underlying heart rhythm. The chest wall stimulation method was used. In complete AV block the escape rhythm recovery time proved highly reproducible on repeated testing on the same day, and in many patients r
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9. Pseudo‐pre‐excitation terminated by overdrive pacing
BMJ Group.
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10. Response of atrial flutter to overdrive atrial pacing and intravenous disopyramide phosphate, singly and in combination.
Ten patients who suffered spontaneous paroxysms of atrial flutter were investigated by electrophysiological techniques. Two had overt Wolff-Parkinson-White syndrome; three Lown-Ganong-Levine syndrome; and one a concealed accessory atrioventricular connection. Atrial flutter was initiated, at study, by right atrial pacing and electrograms from the right atriu
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11. Virulence genes, borders, and overdrive generate single-stranded T-DNA molecules from the A6 Ti plasmid of Agrobacterium tumefaciens.
Agrobacterium tumefaciens transfers the T-DNA portion of its Ti plasmid to the nuclear genome of plant cells. Upon cocultivation of A. tumefaciens A348 with regenerating tobacco leaf protoplasts, six distinct single-stranded T-DNA molecules (T strands) were generated in addition to double-stranded T-DNA border cleavages which we have previously reported (K.
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12. Effects of beta-adrenergic blockade on verapamil-responsive and verapamil-irresponsive sustained ventricular tachycardias.
To assess effects of beta-adrenergic blockade on ventricular tachycardia (VT) of various mechanisms, electrophysiology studies were performed before and after intravenous infusion of propranolol (0.2 mg/kg) in 33 patients with chronic recurrent VT, who had previously been tested with intravenous verapamil (0.15 mg/kg followed by 0.005 mg/kg/min infusion). In