The chemical cross-linking of β-cyclodextrin (β-CD) with ethylenediaminetetraacetic dianhydride (EDTA) led to branched polymers referred to as cyclodextrin nanosponges (CDNSEDTA). Two different preparations are described with 1:4 and 1:8 CD-EDTA molar ratios. The corresponding cross-linked polymers were contacted with 0.27 M aqueous solution of ibuprofen sodium salt (IP) leading to homogeneous,...

Today's application is to magic! Not the friendship kind, though 1 ; instead, we're going to talk about magic squares, an incredibly old piece of mathematics that we can study using Latin squares. Definition. A magic square is a n × n grid filled with the integers {0, 1,. .. n 2 − 1}, such that • each number is used exactly once in our entire grid, and • the sum of all of the entries along any ...

We define a simple algorithm for creating large numbers of semi-magic n× n squares when n is odd. Special cases of the algorithm can also be used to easily create magic and extra magic (or panmagic) n× n squares when n is odd. The algorithm can also create extremely magic n × n squares when n ≥ 5 is prime. These extremely magic n × n squares have n! standard magic n-element subsets, and these n...

Oxidative fusion reactions of meso-phenoxazino Ni(ii) porphyrin were found to be temperature dependent, giving rise to either a doubly phenylene-fused product at room temperature or a singly phenoxazine-fused product at 70 °C. The latter was further oxidized to a doubly phenoxazine-fused Ni(ii) porphyrin, which was subsequently converted to the corresponding free base porphyrin and Zn(ii) porph...

This in situ crossover and blind study was conducted to investigate the effect of professional acidulated phosphate fluoride (APF) gel application time on the subsequent inhibition of enamel demineralization. During 3 phases of 28 days each, 15 volunteers wore palatal appliances containing 4 enamel blocks, which were subjected to 3 treatment groups: not treated (control) and pre-treated with AP...

sured FT3 by Immulite 2000 and ACS 180 plus (Bayer Corporation), as an alternative instrument, and triiodothyronine (T3) only by Immulite 2000 (Table 1). A significant group effect was shown by repeated-measures ANOVA in SST results obtained by Immulite 2000 and ACS 180 plus (F 107.25; P 0.001). T3 values gradually increased in both types of tubes with time, and repeated-measures ANOVA showed a...

The objectives of this study were to investigate the effect of application times on fluoride (F) uptake by sound enamel exposed in vitro to APF gels. Two groups of 12 teeth each were treated with one of the following 1.23% APF gels: MinuteGelTM (gel A) and Nupro® (gel B). The F treatment times were 1, 2, and 4 min and the F concentrations and enamel biopsy depths were determined using an acid-e...