The particular difficulty in applying to histidine the ordinary method of preparing methyl-N-amino acids by methylation of the toluene-sulfonyl derivative is the sensitivity of the imino group of the imidazole ring to methylation. If this grouping could be covered during methylation by some protective grouping which could later be readily removed, the conventional methylation procedure might be...

The nineteenth century saw industrialization become a significant force in the United State of America, just as much developed world, and with these new developments, so-called Eden started to face corruption modern life. With mechanization came speed-up associated capitalist production, alongside this ideas society evils it bears: wealth avarice, degradation human values, general indifference ...

Palacios comunales atemporales presenta un apasionante recorrido cronológico por proyectos visionarios construidos a lo largo de la historia que propusieron soluciones residenciales alternativas los modos vida tradicionales. Desde monasterios eremitas y cenobitas del siglo iv, hasta edificios contemporáneos como el Walden 7 Ricardo Bofill, pasando Familisterio Guise Jean–Baptiste André Godin o ...

Maddala and Wu (1999) proposed a simple panel unit test using a Fisher type test. We propose using Percival and Walden (2006) approximate maximum likelihood estimator of the fractional integration order with a Fisher type test to create a simple panel fractional integration order test. By combining the estimator and the test with a wavestrap method to obtain critical values, we allow for cross-...

on Walden Pond (Massachusetts, USA) using diatoms and stable isotopes Dörte Köster,1∗ Reinhard Pienitz,1∗ Brent B. Wolfe,2 Sylvia Barry,3 David R. Foster,3 and Sushil S. Dixit4 Paleolimnology-Paleoecology Laboratory, Centre d’études nordiques, Department of Geography, Université Laval, Québec, Québec, G1K 7P4, Canada Department of Geography and Environmentals Studies, Wilfrid Laurier University...

Roles of Internal Locus of Control and Self-Efficacy on Managing Job Stressors and Ryff’s Six Scales of Psychological Well-Being by William A. Howatt Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Psychology Walden University August 2012 Abstract The purpose of this study was to investigate the roles internal locus of control and self-Th...