Свойства на-несенных на θ-Al2O3 гетерополисоединений в процессе улав-ливания NOх по данным ИК- спектроскопии in situ

It was shown that carrying a small (up to 1%) amount of a heteropoly compound increases the adsorption of NOx as compared to the original carrier. The increase in adsorption is due to the oxidation of NO to NO2 on the carried heteropoly compound. The main adsorption factors are nitrite and nitrate complexes. Their place of localization is the carrier. As temperature increases, the complexes change to nitrates. The presence of ions of varying valencies in the composition of the Kegin anion reduces the strength of the bond of the nitrate complexes with the surface. The ions that are not in the Kegin anion increase the bond strength. The change in the strength of the bond of nitrates with the surface of the carrier is owned to the carrier modification, which results from disintegration of a part of the carried heteropoly compound.С использованием ИК-спектроскопии in situ в режиме термодесорбции проведено исследование механизма активации оксидов азота на массивных гетерополисоединениях, а также состава адсорбционных комплексов, места их локализации, стабильности, механизма взаимных превращений на нанесенных на θ-Al2O3 гетерополисоединениях. Показано, что нанесение небольшого (до 1%) количества гетерополисоединения увеличивает адсорбцию NOх по сравнению с чистым носителем. Увеличение адсорбции связано с окислением NO до NO2 на нанесенном гетерополисоединении. Основными формами адсорбции являются нитритные и нитратные комплексы, которые локализуются на носителе. С повышением температуры нитритные комплексы превращаются в нитратные. Присутствие ионов переменной валентности в составе аниона Кегина уменьшает прочность связи нитратных комплексов с поверхностью; ионы, не входящие в состав аниона Кегина, увеличивают прочность связи. Изменение прочности связи нитратов с поверхностью носителя происходит в результате модифицирования носителя за счет деструкции части нанесенного гетерополисоединения

The Russian Excellence Initiative for higher education: a nonparametric evaluation of short-term results

This research studies the short-term effects of the Russian Excellence Initiative Project 5–100 on participating universities. To trace the effect, we develop a quasi-experimental methodology. A control group of universities comparable to the Project 5–100 universities at the starting point of the program's implementation was singled out using propensity score matching. Data envelopment analysis was conducted, and the Malmquist productivity index was calculated to trace how and why the efficiency of the “participants” and “nonparticipants” of the Project 5–100 has changed. We find statistically significant positive effects of the policy both on the productivity and on the efficiency of the participating universities

Properties of heteropoly compounds carried on θ-Al₂O₃ in the capturing of NOx using infra red spectroscopy (in situ)

It was shown that carrying a small (up to 1%) amount of a heteropoly compound increases the adsorption of NOx as compared to the original carrier. The increase in adsorption is due to the oxidation of NO to NO2 on the carried heteropoly compound. The main adsorption factors are nitrite and nitrate complexes. Their place of localization is the carrier. As temperature increases, the complexes change to nitrates. The presence of ions of varying valencies in the composition of the Kegin anion reduces the strength of the bond of the nitrate complexes with the surface. The ions that are not in the Kegin anion increase the bond strength. The change in the strength of the bond of nitrates with the surface of the carrier is owned to the carrier modification, which results from disintegration of a part of the carried heteropoly compound

COMPARATIVE CHARACTERISTICS OF FUNCTIONAL CORONARY RESERVE AND MYOCARDIAL INFARCTION RISK IN PATIENTS WITH THE CARDIAC X SYNDROME AND STENOTIC CORONARY ATHEROSCLEROSIS

The aim of this research was to study the functional coronary reserve and frequency of miocardium infarction in patients with cardiologic syndrome X (CX) in comparison with patients with stenosing atherosclerosis of coronary artery (ACA). 54 patients with CX and 83 patients with ACA were examined. Coronaroventriculography,veloergometry, echo, daily ECG monitoring were conducted. It was proved that functional coronary reserve in CX patients is lower than in ACA patients. However risk of miocardial infarction development is higher in ACA patients. In the first place, functional coronary reserve depends on state of terminal sectors of coronary arterial channel both in CX and ACA patients. At the same time risk of miocardial infarction development is above all conditioned by damage of subepicardial arteries, i.e. presence of atheromas in them and relatively little depends on volume of coronary channel’s damage