Directional stability

N HCl, EtOH, reflux, 90% yield for cholesterol. Although a direct stability comparison was not made, this group should be more stable than the THP group for the same reasons that the anomeric ethers of carbohydrates are more stable than their 2-deoxy counterparts. 

Minorski, N. (1922) Directional stability of automatically steered bodies, J. American Society of Naval Engineers, 34, pp. 280-309. 

Large flow-directing stabilizer fins improve pumping capacity for viscosity ranges 500 to 1500 cen-... 

Flecainide (Tambocor) and propafenone (Rythmol) are examples of class I-C drags. These drugs have a direct stabilizing action on the myocardium, decreasing the height and rate of rise of cardiac action potentials, thus slowing conduction in all parts of the heart. 

Pharmacology Propafenone is a Class 1C antiarrhythmic with local anesthetic effects and direct stabilizing action on myocardial membranes. 

Source-dispersion and receptor-oriented models have a common physical basis. Both assume that mass arriving at a receptor (sampling site) from source j was transported with conservation of mass by atmospheric dispersion of source emitted material. From the source-dispersion model point of view, the mass collected at the receptor from source j, Mj, Is the dependent variable which Is equal to the product of a dispersion factor, Dj (which depends on wind speed, wind direction, stability, etc.) and an emission rate factor, Ej, 1. e. , ... 

Normally the guidance includes sensing, computing, directing, stabilizing and servo-control components... 

The first priority is to select sour, astringent and calcined herbs to directly stabilize the essence, fluids, blood and Qi in order to stop their abnormal discharge and prevent further discharge. 

Other Reactions In addition to the direct stabilizing effect of the uronic acid groups, the relatively high yield of hardwood kraft pulp is also due to the readsorption of xylan on the fibers (Fig. 7-35). After kraft pulping of softwood, the glucomannan remaining in the pulp still contains traces of... 

Mandel et al. conclude that stabilization of the compact state of PMA is not primarily due to hydrophobic bonding but should be ascribed to a direct stabilization of certain chain conformations by Van der Waals interactions between the methyl side chains. 

The ADCP current profiles at the same site revealed an interesting structure. Between the surface layer (net outflow) and the near-bottom layer (net inflow) there is an intermediate layer with an upper boundary fluctuating between 12 and 18 m (Table 6.5). At this upper boundary, the mean vector speed is minimum and exhibits a great directional variability (sf). At its lower boundary between 16 and 23 m depth, the intermediate layer exhibits relatively high vector speeds and directional stability. No matter whether the mean values indicate outflow within the entire water column (the opposite case—inflow within the entire water column—was never observed on the long run) or outflow and inflow prevail in the upper and... 

At TW 1 (see Table 6.16), the mean flow is toward northwesterly directions throughout the whole water column. Only close to the bottom the direction veers to the left. Directional stability is moderate at subsurface depth but increases strikingly within the upper layer. The mean current data at TW2 and TW3 during the same time could be the indication of a counterclockwise alongshore flow in the interior of the bay, which is bounded by the northwesterly flow further offshore. 

Data from the shallow inshore sites off Hiddensee (WKl and WK2 at 6 and 7 m depth) also exhibit a directional stability of about 50%. Here, in the narrow Gellenstrom area close to the western coast off Hiddensee, surface waves possibly affect the alongshore flow in addition to wind and topography. 

Note that the nicotinamide group cannot be directly stabilized by H bonding except through the substituent at C-3 because none of the atoms in the ring can... 

Propafenone is a class 1C antiarrhythmic drug with local anesthetic effects and a direct stabilizing action on myocardial membranes. The electrophysiological effect of propafenone manifests itself in a reduction of upstroke velocity (phase O) of the monophasic action potential. In Purkinje fibers, and to a lesser extent myocardial fibers, propafenone reduces the fast inward current carried by sodium ions. The diastolic excitability threshold is increased, and the effective refractory period prolonged. Propafenone reduces spontaneous automaticity and depresses triggered activity. 

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