Adsorption of 2,4-dichlorophenoxyacetic acid in an aqueous medium on nanoscale MIL-53(Al) type materials.

A series of flexible metal-organic frameworks (MOFs) belonging to the MIL-53 family, such as MIL-53(Al), its amino-functionalized analog NH2-MIL-53(Al), and MIL-53(Al) type materials with Al3+ ions and mixed benzene-1,4-dicarboxylate and 2-aminobenzene-1,4-dicarboxylate linkers (MixLR) in various proportions were prepared in a nanocrystalline form using MW-activation under atmospheric pressure according to the original solvothermal procedure. The MIL-53(Al) and NH2-MIL-53(Al) samples feature nanocrystals with sizes of 200-300 nm, while MixLR matrices synthesized in this manner are composed of small nanoparticles with sizes of about 20-30 nm. MIL-53(Al) type materials (MIL-53(Al), NH2-MIL-53(Al) and MixLR) were probed in the adsorption of a typical herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in an aqueous medium.

Optically active derivatives of terephthalic acid: four crystal structures from two powder patterns.

A novel important class of nanoporous crystalline solids, metal-organic frameworks (MOFs), composed of organic ligands (linkers) and metal ions, is now considered as a platform for the development of various functional hybrid materials. In order to design new MOF-based asymmetric catalysts, two terephthalic acid derivatives, namely 2-{[1-(1-tert-butoxycarbonyl)-L-prolyl]amino}terephthalic acid, CHNO, (1), and 2-(L-prolylamino)terephthalic acid, CHNO, (2), which could find potential applications as chiral linkers for the construction of enantioselective MOFs, were synthesized and their powder samples were measured at synchrotron station ID22 (ESRF). Each sample contained two unknown crystalline phases, so four new crystal structures were determined, namely, the 2.

[Dental pulp microvascular reaction in cases of dentine caries treatment by modern nanocomposite materials].

Dental pulp hemodynamics in cases of dentine caries treatment by light cured nanocomposite materials was altered that was characterized by its changing indicators and changing hemodynamic regulation mechanisms depending upon carious cavity depth. Microvascular reaction in dental pulp upon hard dental tissues preparation was accompanied by hyperemia development in microcirculatory bed, its character and degree of expression depended upon carious cavity depth. This reaction was amplified after etching and light polymerization.

[Immobilized papain in the treatment of acute destructive lactation mastitis].

Experience with the surgical treatment of 123 patients has shown the positive effect of proteolytic enzyme Papain immobilized on fiber polymer materials. It shortened the period of purification of purulent wounds of the lactating mammary gland from devitalized tissues which facilitated putting early secondary sutures on the granulating wound without a dissection of wound margins and resulted in quicker healing (13,5 days).