Effect of a Temperature Mode of Radiation-thermal Sintering the Structure and Magnetic Properties of Mn-Zn-ferrites

2000NM Mn-Zn-ferrites have been produced by radiation-thermal sintering (RTS). We have studied the effect of RTS on the electromagnetic properties of ferrites. X-ray diffraction have been used to investigate general aspects of phase transformations during the radiation-thermal sintering of green compacts

Effect of a Temperature Mode of Radiation-thermal Sintering the Structure and Magnetic Properties of Mn-Zn-ferrites

2000NM Mn-Zn-ferrites have been produced by radiation-thermal sintering (RTS). We have studied the effect of RTS on the electromagnetic properties of ferrites. X-ray diffraction have been used to investigate general aspects of phase transformations during the radiation-thermal sintering of green compacts

New composites of betulin esters with arabinogalactan as highly potent anti-cancer agents

<p>Betulin and its esters are the natural compounds with high <i>in vitro</i> cytotoxicity toward many cancer cells. However, the poor water solubility of these compounds has limited their applications. We prepared new composites of betulin esters using two methods, namely ball-milling of the mixtures of betulin esters with arabinogalactan and preparation of thin films of these mixtures by evaporating the aqueous solutions. These composites revealed higher water solubility as compared with the initial substances without losing the structural integrity and functionality. As a result, the new composites have shown much higher inhibitory effects against different cancer cell lines such as Ehrlich ascites carcinoma cells and lung carcinoma cells (A549) in comparison with the initial substances. The cell viability studies based on Annexin V and Propidium iodide probes have confirmed the high proapoptotic effect of betulin ester derivatives against cancer cells.</p

Mechanochemical Synthesis of Cocrystals of Betulin with Adipic Acid

Смешанные кристаллы бетулина с адипиновой кислотой получены механохимической активацией при добавлении небольших количеств органических растворителей. Образование смешанных кристаллов подтверждено методами рентгенофазового анализа и ИК-спектроскопии. С целью выбора жидкости для приготовления смешанных кристаллов проведено сравнение растворителей различной полярности. Показано, что смешанные кристаллы бетулина с адипиновой кислотой образуются, если при механической обработке используются растворители, хорошо растворяющие адипиновую кислотуThe cocrystal of betulin with adipic acid was prepared using a liquid-assisted grinding method. The formation of cocrystal was confirmed by powder X-ray diffraction and IR spectroscopy methods. In order to choose a liquid for preparing cocrystal, solvents of different polarity were compared. It was shown that cocrystal of betulin with adipic acid was formed if solvents were used during mechanical treatment, in which the increased solubility of adipic acid was observe