The use of ion exchange resins in the isolation of blodd group A-specific substance from hog gastric mucin

Ion exchange resins (1) have been used in the investigation of A substance hydrolysates (2), but apparently no attempt has been made to determine whether they can be profitably used in the isolation or purification of undegraded A substance [1] from sources such as hog gastric mucin. Studies along these lines are reported in this communication

Studying Work in the Post Reform Era

This paper emerged from the first stage of what is to be a three-stage multi-disciplinary research project examining work in the 'post-reform era '. The key foci of that research project are the organisation of work, the determination of wages, and the well-being of workers at the workplace level. It will examine how the nature of work varies across workplaces of different sizes and in different competitive environments. The present paper draws on the first stage of the research to share some of the problems experienced while attempting to study workplaces in New Zealand today. It draws on research in 19 Auckland workplaces and reveals serious definitional, theoretical, and methodological problems that are likely to constrain any such research in the present environment. In our case, the problems raised, and the solutions offered, have led to a fundamental rethink of the larger project's research objectives, strategies, and ways to operationalise concepts into empirical measures

Anisotropic elastic moduli for crystalline hexahydro-1,3,5-trinitro-1,3,5-triazine from Monte Carlo calculations and molecular dynamic simulations of the unimolecular dissociation of 1,3,3-trinitroazetidine

Scope and Method of Study: The purpose of this work was two fold. First to determine an efficient means by which to determine the elastic tensor from fluctuation data, specifically, data from Monte Carlo molecular dynamics simulations. The scope focused on the representative high explosive hexahydro-1,3,5-trinitro-1,3,5- triazine (RDX) for the test case of other high explosive grains. The hope is to apply this technique to aid in the mesomechanical and atomistic methods and model of plastic bonded explosives. The second purpose was to model, through classical molecular dynamics, the unimolecular dissociation of 1,3,3- trinitroazetidine (TNAZ) using ab initio calculations and experimental data.Findings and Conclusions: The elastic tensor for RDX was found to be in good agreement with expected results when rigid molecule Monte Carlo molecular dynamics simulations were used. The computed rate of unimolecular dissociation of TNAZ was found to be within the experimental error. The system was found to be statistical

Dark matter and Modified Newtonian Dynamics in a sample of high-redshift galaxy clusters observed with Chandra

We compare the measurement of the gravitational mass of 38 high-redshift galaxy clusters observed by Chandra using Modified Newtonian Dynamics (MOND) and standard Newtonian gravity. Our analysis confirms earlier findings that MOND cannot explain the difference between the baryonic mass and the total mass inferred from the assumption of hydrostatic equilibrium. We also find that the baryon fraction at $r_{2500}$ using MOND is consistent with the Wilkinson Microwave Anisotropy Probe (WMAP) value of $\Omega_{B}/\Omega_{M}$Comment: New Astronomy in pres

Jumping into the Cloud: Privacy, Security and Trust of Cloud-Based Computing Within K-12 American Public Education

The purpose of this study is to gain a deeper understanding of how faculty view Cloud-based computing, how they perceive issues of privacy, security, and trust when using Cloud-based systems in schools, and what differences, if any, exist between their at home use of Cloud-based computer systems and their use of these and similar systems at work. Educators who took part in this study (a) demonstrated a relatively good understanding of the Cloud; (b) perceived the issues of privacy, security, and trust as related to Cloud-based computing as a serious matter, which strongly influenced their acceptance of the Cloud, and to a lesser extent, their use of the Cloud; and (c) had noticeable differences in their perceptions of the Cloud when used for school related tasks, and then, as used for personal, non-work related tasks. The theoretical framework utilized is an adaption of F.D. Davis’s 1989 Technology Acceptance Model, which according to Venkatesh (2000), is the most widely applied model of users\u27 acceptance and usage. Findings from this study inform efforts to improve educators’ understanding of the Cloud as a dynamic technology with constantly evolving trade offs of convenience that are increasingly becoming the enemy of privacy, security, and trust