Some problems encountered in the proposed solid-solid reaction models.

Mathematical Modeling of Fluorination Reaction of Uranium Dioxide and Evaluation of Existing Gas-Solid Reaction Models

Some problems encountered in administering Head Start.

The local, federally-funded Project Head Start is designed primarily t o prepare the pre-school children of Washtenaw County’s low-income families t o enter kindergarten. In addition t o instruction in the verbal, cognitive, and social skills that the children need t o become successful in school, the program provides a nourishing hot lunch, complete dental and medical examinations, and the nec...

Some Solid Transportation Models with Crisp and Rough Costs

In this paper, some practical solid transportation models are formulated considering per trip capacity of each type of conveyances with crisp and rough unit transportation costs. This is applicable for the system in which full vehicles, e.g. trucks, rail coaches are to be booked for transportation of products so that transportation cost is determined on the full of the conveyances. The models w...

Application of SBA-Pr-SO3H as a solid acid nanoreactor in the Biginelli reaction

Sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) with a pore size of 6 nm catalyzed three component coupling of aromatic aldehydes, urea and ethyl acetoacetate to afford the corresponding dihydropyrimidinones under solvent free condition. This new protocol for Biginelli reaction has important advantages such as green synthesis, short reaction time, easy isolation and high yields of ...

Escape from the destruction of the galvanic replacement reaction for solid → hollow → solid conversion process in one pot reaction.

Based on the difference in the redox potentials between two metal species, the galvanic replacement reaction is known to create an irreversible process to generate hollow nanostructures in a wide range of shapes. In the context of galvanic replacement reaction, continuing etching leads to the general collapse of the hollow structures because of the excess amount of oxidizing agent. We demonstra...