Alpert

S. B. Alpert and co-workers. Pyrolysis of Solid Wastes A Technical andEconomic Assessment, NTIS PB 218—231, SRI, Menlo Park, Calif., Sept. 1972. 

S. B. Alpert and D. F. Spencer, Methanol and Eiquid Fuels From Coal—Recent Advances, Electric Power Research Institute, Palo Alto, Calif., 1987. 

Fig. 14. Ionisation gauges (a) triode head and (b) Bayard-Alpert.

The discovery of the x-ray effect spurred the development of a new generation of hot-cathode gauges designed to minimise this effect. One of the earhest, and commercially the most successful, the Bayard-Alpert gauge shown in Eigure 14b, was developed in 1950 (13). A fine wire, the ion collector, is... 

In practice, it is often necessary to take readings from hot-filament ionization gauges or other devices. Figure 5 gives pump-down curves for six different types of pumping equipment on the same vacuum chamber (23). The shape of curve 1 indicates that a real leak could be responsible for the zero slope demonstrated by the Bayard-Alpert gauge (BAG). The shape of the other curves could result from a combination of real and virtual leaks. 

Fig. 5. Plots of pump-down performance for pumps operating on 0.1-m-dia x 0.43-m-long stainless-steel tubing. Curves 1—4 are sputter-ion pumps of different makes curve 5 is Orbitron type and curve 6, LN-trapped oil DP. Pressure is measured using Bayard-Alpert gauge (BAG) (26). To convert Pa to...

Fig. 6. Bayard-Alpert gauge response vs time upon cutting off power to Orbitron pump (27). To convert Pa to torr, divide by 133.3.

Fig. 13. The introduction of a modulator electrode in a Bayard-Alpert gauge permits the pressure range to be lowered by a factor of 10 to 133 pPa...

S. B. Alpert and R. H. Wolk, in M. A. Elliott, ed.. Chemistry of Coal Utilisation, Second Supplementay Uolume, oSm. Wiley Sons, Inc., New York, 1981. 

Alpert and Regnier [37] found that polyethyleneimine (PEI, M = 600) was readily adsorbed by various porous silicas from a methanol solution. After the reversibly adsorbed portion of the polymer was washed out, the content of... 

The chemical adsorption of a relatively high molecular weight neutral polymer (poly(succinimide), M = 13000) on aminopropyl-Vydac 101 TP silica gel was applied by Alpert [47, 48] to prepare a reactive composite support for use in cation-exchange [47] and hydrophobic-interaction [48] chromatography of pro-... 

Alpert has shown [47] that poly(succinimide)-silica can be further hydrolyzed to poly (aspartic acid)-silica or condensed with [3-alanine in aqueous solution to form a covalently bonded copolymer of 2-carboxyethyl aspartamide and aspartic acid. The content of carboxyl groups generated by this way has not been quantified directly, but the cation-exchange hemoglobin capacity has been measured for a series of the packings. Thus, the optimal concentration of poly(succinimide) used in the synthesis was found to be 2 5%. 

Dennery, P.A., Kramer, C.M. and Alpert, S.E. (1989). Thiobarbiturate-reactive substances and activation of arachi-donic acid cascade in cultured rabbit tracheal epithelial cells exposed in vitro to hyperoxia. Am. Rev. Resp. Dis. 139, A42. 

P.K. Hopke, D.J. Alpert and B.A. Roscoe, FANTASIA — A program for target transformation factor analysis to apportion sources in environmental samples. Comput. Chem., 7 (1983) 149-155. 

Alpert, A. J. and Regnier, F. E., Preparation of a porous microparticulate anion-exchange chromatography support for proteins, /. Chromatogr., 185, 375,1979. 

Alpert, A. J., Cation-exchange high-performance liquid chromatography of proteins on poly(aspartic acid)-silica, /. Chromatogr, 266, 23, 1983. 

D3. Danenberg, H. D., Alpert, G., Lustig, S., and Ben-Nathan, D., Dehydroepiandrosterone protects mice from endotoxin toxicity and reduces tumor necrosis factor production. Antimicrob. Agents Chemother. 36,2275-2279 (1992). 

Swiderek, K. M. Alpert, A. J. Heckendorf, A. Nugent, K. Patterson, S. D. Structural analysis of proteins and peptides in the presence of detergents Tricks of the trade. ABRF News 1997. 

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