Prevention of the development of root on stage of post-harvest storage of sugar beet

This article is devoted to the study of the reasons for the decline in the quality of root crops during post-harvest storage in piles under the influence of harmful microflora. The subject of the research is the process of sugar beet storage in enterprises. The causes of sugar beet mass losses are analyzed. Mathematical models have been developed for the intensity of damage to root crops by the most common types of clamp rot. A description of an automated information system designed to maintain the normative parameters of the microclimate inside the piles by means of information technologies is given

Recent observation of

We report on the first observation of B̄0→D1(2430)0ω, B̄0→D1(2420)0ω and B̄0→D2*(2460)0ω decays and determination of their rates as well as the fractions of longitudinal polarizations of the ω for these decays. We also discuss improved measurements of the B→DD*s0(2317) branching fractions with a search for isospin partners of the D*s0(2317)+ state, Z0 and Z++. These measurements use a data sample containing 772 million BB̄ events collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider

The Belle II experiment: status and physics program

The Belle II experiment at the SuperKEKB asymmetric-energy e+e- collider in Japan aims to search for new physics in the flavour transitions in the quark and lepton sectors. The SuperKEKB accelerator will operate at the target instantaneous luminosity of 8 × 1035 s-1cm2. It requires a substantial upgrade of the detector subsystems which are expected to record 50 ab-1 of data. Such a huge data sample in clean background environment allows for probing signatures of new physics through suppressed flavour physics reactions and cross checks for deviations from the Standard Model measured at the LHCb experiment. Physics data taking at the Belle II experiment successfully started in April 2018

Lidar investigations of thermal regime and aerosol stratification of the stratosphere over tomsk

One of the important applications of lidar techniques is the study of thermal regime and aerosol content of the stratosphere. Such investigations in monitoring mode were started at the Institute of atmospheric optics since 1994 and are continued to date. The main attention is paid for the study of the unexpected disturbances caused by winter stratospheric warming. In this paper we present the results of the study of the vertical distribution of temperature and aerosol over Tomsk of last years

Lidar investigations of thermal regime and aerosol stratification of the stratosphere over tomsk

One of the important applications of lidar techniques is the study of thermal regime and aerosol content of the stratosphere. Such investigations in monitoring mode were started at the Institute of atmospheric optics since 1994 and are continued to date. The main attention is paid for the study of the unexpected disturbances caused by winter stratospheric warming. In this paper we present the results of the study of the vertical distribution of temperature and aerosol over Tomsk of last years

Prevention of the development of root on stage of post-harvest storage of sugar beet

This article is devoted to the study of the reasons for the decline in the quality of root crops during post-harvest storage in piles under the influence of harmful microflora. The subject of the research is the process of sugar beet storage in enterprises. The causes of sugar beet mass losses are analyzed. Mathematical models have been developed for the intensity of damage to root crops by the most common types of clamp rot. A description of an automated information system designed to maintain the normative parameters of the microclimate inside the piles by means of information technologies is given

Laser Thermochemical High-Contrast Recording on Thin Metal Films

Laser-induced thermochemical recording of nano- and microsized structures on thin films has attracted intense interest over the last few decades due to essential applications in the photonics industry. Nevertheless, the relationship between the laser parameters and the properties of the formed oxide structures, both geometrical and optical, is still implicit. In this work, direct laser interference patterning of the titanium (Ti) film in the oxidative regime was applied to form submicron periodical structures. Depending on the number of laser pulses, the regime of high contrast structures recording was observed with the maximum achievable thickness of the oxide layer. The investigation revealed high transmittance of the formed oxide layers, i.e., the contrast of recorded structures reached up to 90% in the visible range. To analyze the experimental results obtained, a theoretical model was developed based on calculations of the oxide formation dynamics. The model operates on Wagner oxidation law and the corresponding optical properties of the oxide–metal–glass substrate system changing nonlinearly after each pulse. A good agreement of the experimental results with the modeling estimations allowed us to extend the model application to other metals, specifically to those with optically transparent oxides, such as zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), and tantalum (Ta). The performed analysis highlighted the importance of choosing the correct laser parameters due to the complexity and nonlinearity of optical, thermal, and chemical processes in the metal film during its laser-induced oxidation in the air. The developed model allowed selecting the suitable temporal–energetic regimes and predicting the optical characteristics of the structures formed with an accuracy of 10%. The results are promising in terms of their implementation in the photonics industry for the production of optical converters

Identifying Performance Descriptors in CO2CO_2 Hydrogenation over Iron‐based Catalysts Promoted with Alkali Metals

Alkali metal promoters have been widely employed for preparation of heterogeneous catalysts used in many industrially important reactions. However, the fundamentals of their effects are usually difficult to access. Herein, we unravel mechanistic and kinetic aspects of the role of alkali metals in CO$_2$ hydrogenation over Fe-based catalysts through the state-of-the-art characterization techniques, spatially resolved steady-state and transient kinetic analyses. The promoters affect electronic properties of iron in iron carbides. These carbide characteristics determine catalyst ability to activate H$_2$ , CO and CO$_2$. The Allen scale electronegativity of alkali metal promoter was successfully correlated with the rates of CO$_2$ hydrogenation to higher hydrocarbons and CH$_4$ as well as with the rate constants of individual steps of CO or CO$_2$ activation . The derived knowledge can be valuable for designing and preparation of catalysts applied in other reactions where such promoters are also used

Identifying Performance Descriptors in CO2 Hydrogenation over Iron‐based Catalysts Promoted with Alkali Metals

Alkali metal promoters have been widely employed for preparation of heterogeneous catalysts used in many industrially important reactions. However, the fundamentals of their effects are usually difficult to access. Herein, we unravel mechanistic and kinetic aspects of the role of alkali metals in CO(2) hydrogenation over Fe‐based catalysts through state‐of‐the‐art characterization techniques, spatially resolved steady‐state and transient kinetic analyses. The promoters affect electronic properties of iron in iron carbides. These carbide characteristics determine catalyst ability to activate H(2), CO and CO(2). The Allen scale electronegativity of alkali metal promoter was successfully correlated with the rates of CO(2) hydrogenation to higher hydrocarbons and CH(4) as well as with the rate constants of individual steps of CO or CO(2) activation. The derived knowledge can be valuable for designing and preparing catalysts applied in other reactions where such promoters are also used