The molecular weight of a polymer determines key optoelectronic device characteristics, such as internal morphology and charge transport. Therefore, it is important to ensure that polymer deposition techniques do not significantly alter the native polymer molecular weight. This work addresses polymers deposited by resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE). By using ...

Increased Al mobilization and Ca and Mg leaching have been linked to nutritional imbalances in sugar maple across the northeastern US and Canada. The susceptibility of sugar maple fine roots to Al stress is poorly understood, in part because roots respond to Al stress by altering the chemistry of the rhizosphere. AlCl3 was applied to plots of sugar maple at the Hubbard Brook Experimental Forest...

A new experience teaching programming and numerical methods to engineering students, using Maple to implement the Chor-Rivest cryptosystem, is shown. The aim is to give the students a better understanding of cryptography by using Maple software. In this paper we discuss our attempts to structure an on-line course that required the students participation, interest, and evaluation by means of a new

INTRODUCTION Although a number of factors affect maple sap flow in vacuum tubing systems, it has become increasingly apparent that sap yields are largely a function of two major influences: vacuum level at the taphole and taphole and tubing sanitation. Vacuum controls sap yield by heightening the pressure differential between the inside of the tree and the inside of the tubing system, therefore...

Zeiten und Winde des Lebens verwehen uns Menschen im Räume doch der Erinnerung Bild bindet für immer das Herz. The Born-Haber Cycle (BHC) is critically reviewed, the origin of severe limitations in its appli­ cation is shown. Partly this is based on the construction of the third step, partly it is connected with the fact that most of the "classical" anions of inorganic chemistry are instable, "...