The isolation of crystalline ar-amylase has been reported in a preliminary communication (1). Details of the method of isolation, behavior of the fractions leading to crystallization, and some properties of the crystalline material are reported here. This material constitutes the first instance of the crystallization of an cu-amylase from a higher plant and is probably the only protein crystall...

In seeking solutions to the problem of the high viscosity of electrochemically stable sulfone electrolyte solvents for high voltage lithium cells, we have explored a number of binary sulfone + cosolvent systems, including allsulfone cases. We report systems that at 55 °C are nearly as conductive as the “standard” carbonate-based electrolyte and may merit further study. We employ a plot based on...

Balls, A. K., Thompson, R. R. & Walden, M. K. (1946). J. biol. Chem. 163, 571. Bals, A. K., Walden, M. K. & Thompson, R. R. (1948). J. biol. Chem. 178,9. Bell, D. J., Gutfreund, H., Cecil, R. & Ogston, A. G. (1948). Biochem. J. 42, 405. Bell, D. J. & Manners, D. J. (1952). J. chem. Soc. p. 3641. Bell, D. J. & Young, F. G. (1934). Biochem. J. 28, 882. Bird, R. & Hopkins, R. H. (1954). Biochem. J...

Digital hearing aids have gained rapidly in popularity in recent years, now comprising over 93% of the US market (figure 1). Interestingly, despite this increase, customer satisfaction, benefit, use, and residual disability have not changed appreciably during the past decade (figure 2). One hearing aid feature, however, that has produced considerable increases in patient satisfaction is the dir...

Physicochemical properties, ionicity, and fragility for protic ionic liquids (PILs) based on the protonation of the extremely fragile molecular liquid decahydroisoquinoline (DHiQ) by various Brønsted acids have been studied. The ionicity was evaluated using the Walden plot diagnostic, while the m-fragility (slope of T(g)-scaled Arrhenius plot at T(g)) was quantitatively measured by the Moynihan...

Massively Multiplayer Online Role-Playing Games As Constructivist Learning Environments by Mark Douglas Wagner M.A., National University, 2000 B.A., California Polytechnic State University at San Luis Obispo, 1998 Proposal Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Educational Technology Walden University May 2008 ABSTRACT Formal K12 education...