Фрактальные закономерности в физике микромира

The fractal regularities in the microcosm physics are investigated. The fractals, pecular for the elementary particles inside structure are shown. For the proton and neutron inside structure, it is found the new type fractal, which is the base for the mentioned particles fractal formulae derivation. The confirmation of the fractal approach correction in respect to the elementary particles is the fact that the proton fractal usage provides to explain the essence of its mass, which equals to 1836.15 of electron masses. The new microcosm fractals are unique and do not concern to the known fractal structures. There are the arguments to suppose that the proton fractal refers to the natural structures base, what gives the way for the discovery of the fundamental genetics code of the matter structure in the Universe.Исследуются фрактальные закономерности в физике микромира. Приведены фракталы, характерные для внутренней структуры элементарных частиц. Для внутренней структуры протона и дейтрона найден фрактал нового типа, на основе которого получены фрактальные формулы протона и дейтрона. Подтверждением правильности фрактального подхода к элементарным частицам является то, что с использованием фрактала протона находит объяснение природа его массы, равная 1836,15… электронным массам. Новые фракталы микромира являются уникальными и не могут быть отнесены к известным фрактальным структурам. Есть основания полагать, что фрактал протона лежит в основе природных структур, что открывает путь для раскрытия фундаментального генетического кода строения вещества во Вселенной

Role of strontium cations in ZSM-5 zeolite in the methanol-to-hydrocarbons reaction

The selectivity of the methanol-to-hydrocarbons (MTH) reaction can be tuned by modifying zeolite catalysts with alkaline earth metals, which typically increase propylene selectivity and catalyst stability. Here we employed Sr2+ as its higher atomic number in comparison to the zeolite T atoms facilitates characterization by scanning transmission electron microscopy and operando X-ray absorption spectroscopy. Sr2+ dispersed in the ZSM-5 micropores coordinates water, methanol, and dimethyl ether during the MTH reaction. Complementary characterization with nuclear magnetic resonance spectroscopy, thermogravimetric analysis combined with mass spectrometry, operando infrared spectroscopy, and X-ray diffraction points to the retention of substantially more adsorbates during the MTH reaction in comparison to Sr-free zeolites. Our findings support the notion that alkaline earth metals modify the porous reaction environment such that the olefin cycle is favored over the aromatic cycle in the MTH, explaining the increased propylene yield and lower deactivation rate

Development of technique for testing the long-term stability of silicon microstrip detectors

An automatic multi-channel set-up prototype for simultaneous testing of the Long-Term Stability (LTS) * of more than ten detectors is described. The Inner Tracking System of the ALICE experiment will include about two thousand Double-Sided Microstrip Detectors (DSMD). Efficient automatic measurement techniques are crucial for the LTS test, because the corresponding test procedure should be performed on each detector and requires long times, at least two days. By using special adapters for supporting and connecting the bare DSMDs, failing detectors can be screened out before module assembly, thus minimizing the cost. Automated probe stations developed for a special purpose or for microelectronics industry are used for measuring physical static DSMD characteristics and check good-to-bad element ratio for DSMD. However, automated (or semi-automatic) test benches for studying LTS or testing DSMD long-term stability before developing a detecting module are absent.Важная часть тестирования детектора и процедура определения гарантии качества состоит в изучении долговременной стабильности основных характеристик (ДСХ) детекторов, включая исследование эффектов влияния окружающей среды, таких как влажность или температура. В данной работе описаны метод тестирования и автоматический многоканальный стенд, специально разработанный для одновременного тестирования ДСХ более чем десяти детекторовВажлива частина тестування детектора і процедури визначення гарантії якості складається у вивченні довгострокової стабільності основних характеристик (ДСХ) детекторів, включаючи дослідження ефектів впливу навколишнього середовища, таких як вологість або температура. У даній роботі описані метод тестування та автоматичний стенд, спеціально розроблений для одночасного тестування ДСХ більш ніж десяти детекторів

The Role of Culture in Business Transaction:Implications for Success in Trans-Geographical Settings

Non-oxidative dehydroaromatization of methane (MDA) is a promising catalytic process for direct valorization of natural gas to liquid hydrocarbons. The application of this reaction in practical technology is hindered by a lack of understanding about the mechanism and nature of the active sites in benchmark zeolite-based Mo/ZSM-5 catalysts, which precludes the solution of problems such as rapid catalyst deactivation. By applying spectroscopy and microscopy, it is shown that the active centers in Mo/ZSM-5 are partially reduced single-atom Mo sites stabilized by the zeolite framework. By combining a pulse reaction technique with isotope labeling of methane, MDA is shown to be governed by a hydrocarbon pool mechanism in which benzene is derived from secondary reactions of confined polyaromatic carbon species with the initial products of methane activation

Synthesis and separation properties of an α-alumina-supported high-silica MEL membrane

A thin high-silica MEL membrane was synthesized on a porous a-alumina hollow fiber support by a secondary growth approach. The membrane quality was evaluated by permporometry, single-gas permeation and butane isomer separation. Comparison of the pervaporation performance of MEL membranes with a MFI membrane of similar quality and thickness shows that MEL membranes offer a higher flux in ethanol pervaporation at nearly selectivity

Improving separation performance of high-silica zeolite membranes by surface modification with triethoxyfluorosilane

Treatment with triethoxyfluorosilane (TEFS) enhances the hydrophobic properties of high-silica MFI and MEL membranes synthesized by a microwave-assisted secondary growth method. The modified membranes showed significant improvement in recovery of ethanol from ethanol/water mixtures by pervaporation. The TEFS treatment was also able to heal some intercrystalline defects in the zeolite membrane film. Additional physical–chemical characterization revealed that the external zeolite surface is selectively covered by the organosilane without blocking zeolite micropores. The grafted Si–F moieties are thermally and hydrothermally stable