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Branching extensive

Neurons have three parts the cell body and dendrites, the axon, and axon terminals. The cell body contains the nucleus and the organelles needed for metabolism, growth, and repair. The dendrites are branched extensions of the cell body membrane. The axon is a long, thin structure which transfers electrical impulses down to the terminals. The axon divides into numerous axon terminals and it is in this specialized region that neurotransmitters are released to transmit information from one neuron to its neighbors. The synapse has been defined as the space between two subsequent interrelated neurons. ... [Pg.291]

There is also some evidence for morphological differences between DRN and MRN neurons which could impinge on their function. Thus, the terminals of neurons from the DRN are relatively fine, unmyelinated, branch extensively and seem to make no specialised synaptic contacts, suggesting en passant release of 5-HT (type I). In contrast,... [Pg.189]

Group Branch Extension of Aromaticity Sigma/Rho Fragment Interaction Special ortho effects Crowding Intramolecular Hydrogen Bonding... [Pg.364]

A three dimensional integration of this density over values of r ranging from 0 to the mean branch extension, Rg (which is also proportional to the global star size Rg), i.e., over the overall chain volume, give the total number of units in the star, N. In this manner the chain mean size is estimated as... [Pg.47]

Oxidative chain reactions of organic compounds are current targets of theoretical and experimental study. The kinetic theory of collisions has influenced research on liquid-phase oxidation. This has led to determining rate constants for chain initiation, branching, extension, and rupture and to establishing the influence of solvent, vessel wall, and other factors in the mechanism of individual reactions. Research on liquid-phase oxidation has led to studies on free radical mechanisms and the role of peroxides in their formation. [Pg.13]

This opened the possibility of ascertaining quantitative characteristics in the numerous individual reactions comprising the complex mechanism of oxidative chain reactions. Thus, rate constants have been determined for reactions with respect to their initiation and the branching, extension, and chain rupture, establishing specific details concerning the influence of solvents, reaction vessel surfaces, and other factors on the mechanism of individual reactions. Results of these investigations have... [Pg.14]

II Pseudopodia of simple or branching extensions of either ectoplasm and endoplasm, or merely of ectoplasm. [Pg.17]

Homma, N., Takei, Y., Tanaka, Y., Nakata, T., Terada, S., Kikkawa, M., Noda, Y., and Hirokawa, N. (2003). Kinesin superfamily protein 2A (KIF2A) functions in suppression of collateral branch extension. Cell 114, 229-239. [Pg.293]

Neurogliaform cells, found in layers I and II, have spherical somata and they are the most common cell type in layer I. The dendritic trees of these cells are usually restricted to a single sublamina in layer I. The axons are unmyelinated and branch extensively. Neurogliaform cells in layer II are essentially similar to those in layer I. [Pg.176]

Deep to the external plexiform layer is the mitral cell layer (Fig. 2). This is a thin layer that contains the somata of mitral cells (25- 35 pm diameter) arranged in almost a monolayer. These cells are the principal output cells of the bulb and, with some minor species differences (cf. Scott, 1986), have one apical dendrite that enters a single glomerulus, where it branches extensively and is synaptically contacted by olfactory axons (Shepherd, 1972a) (Figs. 4C,E, 5 and 12). [Pg.488]

Indications that the formation of inappropriate projections might be a more widespread phenomenon came from later studies in leech and grasshopper embryos. Leech motoneurons (Baptista and Macagno, 1988) and sensory neurons (Gao and Macagno, 1987a,b) were found to branch extensively along inappropriate peripheral and central pathways (Fig. 2). Myers et al. (1990) found that... [Pg.6]

Halpem et al. (1991) and Sink and Whitington (1991a) have also reported a close association between the axons of embryonic motoneurons and muscles in the Drosophila embryo. As the RP motor axons advance to their target muscles, they traverse three sheets of muscle fibres. Each motor axon branches extensively over these muscles, including non-target muscles. It thus appears as if the muscles in this sheet contain a guidance cue or cues, which can be recognised by all of the RP... [Pg.18]

Bathroom tiles Rubber bands Tree branches Extension cords Notebook paper... [Pg.45]

A third important factor in biodegradation is the presence of cleavable bonds in the alkyl chain, which depend on branching. Extensive branching of the alkyl chain tends to reduce the rate of biodegradation. This is probably due to steric hindrance preventing close approach of the surfactant molecule into the active site of the enzyme. [Pg.18]


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See also in sourсe #XX -- [ Pg.246 ]




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Extension, Branching, and Cross-Linking Reactions

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