Active Damping
Mostrando 25-31 de 31 artigos, teses e dissertações.
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25. Stepped versus continuous rotatory motors at the molecular scale
Nature invented molecular rotatory devices such as the flagellar motor and ATP synthase. Photoselection techniques have been frequently used to detect the rotational random walk of proteins but only rarely for the rotational drift of subunits in proteins. Pertinent theories predict an oscillatory behavior of the polarization anisotropy, r, for unidirectional
The National Academy of Sciences of the USA.
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26. A model for amplification of hair-bundle motion by cyclical binding of Ca2+ to mechanoelectrical-transduction channels
Amplification of auditory stimuli by hair cells augments the sensitivity of the vertebrate inner ear. Cell-body contractions of outer hair cells are thought to mediate amplification in the mammalian cochlea. In vertebrates that lack these cells, and perhaps in mammals as well, active movements of hair bundles may underlie amplification. We have evaluated a m
The National Academy of Sciences.
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27. Characterization of Genes Involved in Biosynthesis of a Novel Antibiotic from Burkholderia cepacia BC11 and Their Role in Biological Control of Rhizoctonia solani
Genetic manipulation of fluorescent pseudomonads has provided major insight into their production of antifungal molecules and their role in biological control of plant disease. Burkholderia cepacia also produces antifungal activities, but its biological control activity is much less well characterized, in part due to difficulties in applying genetic tools. H
American Society for Microbiology.
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28. ARABIDOPSIS CRINKLY4 Function, Internalization, and Turnover Are Dependent on the Extracellular Crinkly Repeat DomainW⃞
The study of the regulation and cellular dynamics of receptor kinase signaling in plants is a rapidly evolving field that promises to give enormous insights into the molecular control of signal perception. In this study, we have analyzed the behavior of the L1-specific receptor kinase ARABIDOPSIS CRINKLY4 (ACR4) from Arabidopsis thaliana in planta and have s
American Society of Plant Biologists.
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29. A frequency analysis of neuronal activity in monkey thalamus, motor cortex and electromyograms in wrist oscillations.
1. Extracellular recordings were made in three monkeys while recording from neurones in the motor cortex (eighty-four cells), ventro-posterior lateralis pars caudalis (VPLc, forty-two cells) and cerebellar thalamus (seventy-seven cells). 2. This experiment was designed to produce active and reflex movements of varying velocities in order to study the relatio
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30. Limiting dynamics of high-frequency electromechanical transduction of outer hair cells
High-frequency resolution is one of the salient features of peripheral sound processing in the mammalian cochlea. The sensitivity originates in the active amplification of the travelling wave on the basilar membrane by the outer hair cells (OHCs), where electrically induced mechanical action of the OHC on a cycle-by-cycle basis is believed to be the crucial
The National Academy of Sciences.
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31. Electrical transients produced by the toad urinary bladder in response to altered medium osmolality.
1. The effects of changes in media osmolality on the transepithelial current through the toad urinary bladder under voltage-clamp conditions have been studied. Over the limited range (+/- 24 mosmol/kg H2O) used in these investigations, changes in the osmolality of the mucosal bathing fluid produced no changes in transepithelial current. 2. Changes in osmolal