The zeolite's textural properties have a significant effect on effectiveness in the different industrial processes. This research aimed to study textual of NaX and FeX zeolites using nitrogen adsorption-desorption technique at constant low temperature. According International Union Pure Applied Chemistry, isotherm showed that studied materials were mixed kinds I/II isotherms H3 type hysteresis....

A new one-pot electrophilic chlorination and bromination with oxidative demethylation uses harmless inexpensive sodium chloride bromide Oxone to yield alicyclic ring-fused bis-benzimidazolequinones.

I present an overview of nal coalgebras together with a description of initial algebras, showing the analogies between the two. In particular , I show how initiality of algebras leads to the properties of deenition by recursion and proof by induction. I then show how nal coalgebras have the analogous properties of deenition by corecursion and proof by coinduction, motivating the latter by Peter...

We discuss two themes from Chandra observations of galaxies, groups, and clusters. First, we review the merging process as seen through the high angular resolution of Chandra. We present examples of sharp, edge-like surface brightness structures " cold fronts " , the boundaries of the remaining cores of merger components and the Chandra observations of CL0657, the first clear example of a stron...