Abstract: In a method of melting glass in burner-heated glass melting tanks wherein preheated pellets comprised of quartz, sand, sodium carbonate, potassium carbonate, lime, and magnesium oxide ae injected by a pressurized gaseous medium into a glass melt contained in the tanks, the improvement comprising injecting the pellets in a manner adapted to form a veil-like formation above the melt extending over substantially the entire melt surface and over substantially all of the burner flames.
Abstract: A stable, apparently polymeric, form of 1,1'-dimethyl-4,4'-dipyridyl dichloride is non-reversibly produced on a solid, minigrid electrode surface by means of electrolysis of a solution of the dicationic species using a negative applied potential in the range where the cation radical is heterogeneously formed but not negative enough to produce the neutral species. For example, a thin film is formed on a gold electrode at a potential of between about -0.750 V and -0.950 V vs a Ag/AgCl reference electrode.The electrode and stable surface films are electro-active in heterogeneous reduction and oxidation of large biological molecules, making the modified electrode useful, for example, in the quantitative analysis of heme proteins in biological fluids (blood, urine).
October 25, 1977
Date of Patent:
March 13, 1979
Virginia Commonwealth University
Fredrick M. Hawkridge, Harlie L. Landrum
Abstract: A motor speed control system which comprises: (a) a power modulator circuit having gating means adapted to control the power supplied to the motor; (b) means adapted to provide a voltage which is directly proportional to the instantaneous motor terminal current; (c) means adapted to provide a sensing current which is directly proportional to the voltage across means (b), and thus to the instantaneous motor terminal current; (d) means adapted to provide a sensing current which is directly proportional to the instantaneous motor terminal voltage; (e) summing means adapted to algebraically sum the instantaneous values of the two sensing currents; (f) integrator means adapted to average the sum of instantaneous values provided by means (e); and, (g) feedback means adapted to generate a signal for operating the gating means, said signal having a phase determined by the output of the integrator means, whereby the output of the integrator means controls the phase of the gating means and thereby controls the power su
Abstract: The pH of milk is lowered to 4.5 to 5.5 by direct acidification without the necessity of cooling the milk to avoid local coagulation and casein precipitation by adding acid as a spray from above a portion of the milk surface undergoing high velocity mixing.