Sodium—continued

Boric oxide is used to produce many types of glass including low-sodium, continuous filaments for glass-belted tires, and fiberglass plastics. It also is used to make ceramic coatings, porcelain enamels and glazes. Also, the compound is used as an acid catalyst in organic synthesis and to prepare several other boron compounds. 

Add with mixing in the following order niacinamide, riboflavin-5 -phosphatc sodium, meth-ylparaben, benzoic acid, and saccharin sodium. Continue mixing and heat to 95° to 100°C and hold to completely dissolve the ingredients. Add, in portions, calcium chloride and stir until complete solution. 

As the ascending limb of the loop re-enters the renal cortex, sodium continues to be removed from the tubular fluid by the sodium pump, accompeinied electrostatically by chloride. Both ions pass into the interstitial tissue (site 3) from which they are rapidly removed because cortical blood flow is high and there are no vasa recta present consequently the urine becomes more dilute. Thiazides act principally at this cortical diluting segment of the ascending limb, preventing sodium reabsorption. They inhibit the NaCl co-transporter (called NCCT). 

Carbon dissolves in liquid sodium but to a lesser extent than do hydrogen or oxygen, and methods for determining the carbon content of liquid sodium continuously are generally less advanced than those for oxygen and hydrogen. 

Inhibition of the Na K ATPase with ouabain does not completely prevent sodium reabsorption. Sixty percent of the sodium continues to be reabsorbed suggesting that other mechanisms of sodium transport must exist, for example, an Na/Cl/H20 transport [73]. 

Sodium metal comes from the electrolysis of molten sodium chloride in an apparatus called the Downs cell after its inventor J. C. Downs. Molten sodium forms at the cathode. Sodium metal wreis formerly very important in the process for making the gasoline additive tetraethyl lead. As leaded fuel is no longer sold in the United States, this use has declined, but sodium continues to be used in organic syntheses, the manufacture of titanium, and as a component (with potassium) in high-temperature heat exchange media for nuclear reactors. 

Keywords biodiesel, mesoporous alumina, sodium, continuous bed-reactor... 

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