Barbs

A curved arrow shown as a single barbed fishhook signifies the movement of one electron Normal curved arrows track the movement of a pair of electrons... 

Band theory Ban-Flame process Banked memory Banocide Bantu siderosis Barb an Barbased Barbital... 

Once the plant is ready, the cotton is mechanically harvested with either a spindle picker or cotton stripper. The spindle picker selectively harvests seed cotton from open boUs. The unopened boUs are left on the plant and can be picked at a later date. The spindle picker uses a rotating tapered barbed spindle to remove the cotton from the bur (seed case). The seed cotton is wrapped around the spindle, pulled from the bur, removed from the spindle with a mbber doffer, and then transferred to a basket. 

Fig. 18-2. Surface chart for 06Z Friday, November 20, 1981. Contours are isobars of atmospheric pressure 12 is 1012 mb. Line with triangles, cold front line with semicircles, warm front line with both triangles and semicircles, an occluded front (a cold front that has caught up with a warm front). Wind direction is with the arrow wind speed is 10 knots for 1 barb, 5 knots for one-half barb. Small station circles indicate calm. H, center of high pressure L, center of low pressure.

In a tube type ESP, the tubes are 8-25 cm in diameter and 1-4 m long. They are arranged vertically in banks with the central wires, about 2 mm in diameter, suspended in the center with tension weights at the bottom. Many innovations, including square, triangular, and barbed wires, are used by different manufacturers. 

By fractionation of an extract of the bark of Strychnos lethalis Barb., Carneiro has obtained two products, strychnolethaline, C22H27O4N, and curalethaline, CjgHjiOjN, which he has also isolated from samples of curare. 

Ittnt, pref. (of bersten) burst, exploded, etc. Bait, m. beard bur, seam barb, blrdg, a. bearded, hartlos, a. beardless. 

Wider-haken, m. barb, -hall, m. echo, rever beration. 

Cytochalasins B and D are used as tools to study F-actin. Cytochalasins bind to the barbed end of F-actin and block the addition as well as dissociation of G-actin at that end. When applied to cultured cells micromolar concentrations of cytochalasins remove stress fibres and other F-actin structures. 

The interaction with myosin motors enables F-actin to transport molecules as well as to change or maintain the shape of the cell by exerting tension. Thus, myosin-I motors move to the barbed end and can transport cargoes such as vesicles. When immobilized at the cargo site... 

The cy tochalasins A, B, C, D, E, and H are found in various species of mould. Mainly cytochalasin B and D are used as experimental tools. Cytochalasin D is 10 times more potent, acting at concentrations between 2 and 35 nM in cell-free systems. Cy tochalasins bind to the barbed end of F-actin and block the addition as well as dissociation of G-actin at that end. At micromolar concentrations, cytochalasin D can bind to G-actin and actin dimers and thus block additional polymerization. When applied to cultured cells, micromolar concentrations of cytochalasins remove stress fibres and other F-actin structures. 

F-actin (also called microfilament or actin filament) is a double-stranded, right-handed helix with 14 actin molecules per strand and turn. F-actin has a diameter of 8 nM and is polarized with a pointed (minus) and a barbed (plus) end. 

Ram ford, C.l I. Barb, W.G. Jenkins, A.D. Onyon, P.F. The Kinetics of Vinyl Polymerization by Radical Mechanisms Butter worths London. 1958. 

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