An indestructible multilayer thermal-barrier coating is proposed for a promising reusable capsule-type lander. This coating is based on a porous carbon-ceramic material. The thermal state of the ...coating proposed was simulated mathematically for different types of its reinforcement and different values of the porosity and the heat-conductivity coefficient of the carbon-ceramic material. Results of a numerical simulation of the temperature state of an element of the multilayer thermal-barrier coating are presented. On the basis of these data, the thickness and the weight efficiency of the coating were estimated.
Lipid Composition of Cirsium setosum Nikolaeva, I. G.; Tsybiktarova, L. P.; Taraskin, V. V. ...
Chemistry of natural compounds,
07/2019, Volume:
55, Issue:
4
Journal Article
A technological unit is described that allows the recovery of waste from small-scale wholesale industries that produce noise-absorbing materials. The unit, with a capacity of 50 kg/h for raw ...material, makes it possible to process incoming waste during oxidative pyrolysis process both in the liquid and solid states. It is shown that the unit provides conversion of gaseous products of the first processing stage into simple low-danger compounds at the final stage.
The aim of this study was to determine the total saikosaponin content in some species of Bupleurum L. genus. For the first time, the saikosaponin content was investigated in roots of B. ...scorzonerifolium from Buryatia and Mongolia. The differences in the quantitative content of saikosaponins in the B. scorzonerifolium roots can be explained by the possible polymorphism of this plant. Dynamic change of the total saikosaponin content in roots of B. scorzonerifolium in different phenophases didn't undergo significant changes. The total saikosaponin content was at the highest level in the roots of B. bicaule.
Studies have been carried out of the prospects of using soundproofing screens to reduce the effect of the impact of noise. Adhesive compositions are used as a noise-absorbing material in the capacity ...of parts of multilayer screens consisting of metal plates. It has been established that the characteristics of the used glue do not considerably affect the sound-absorption level. It was recommended to use adhesive compositions with the highest technological characteristics validated in the process of applying sound-insulating coatings as sound-insulating materials.
The variation of the content of biologically active compounds (essential oil, lipid fraction, and phenolics) in aerial parts of
Bupleurum scorzonerifolium
Willd. is studied in relation to the plant ...development phase. The flowering phase features the most diverse range of essential oil constituents. Fifteen terpene compounds are invariably present in the essential oil at every phenophase:
p
-cymene, β-myrcene,
trans
-β-ocimene, limonene, (
Е,Е
)-α-farnesene, α-copaene, β-elemene,
humulene,
germacrene D, caryophyllene, γ‑muurolene, bicyclogermacrene, Δ-cadinene, T-muurolol, and spatulenol. Quantitatively, the content of these constituents varies from traces to the level of major constituents, depending on the phenological phase. The components that invariably present in the lipid phase are identified. The C16:0 acid is the major saturated fatty acid. Its content changes at different phenophases: while remaining at approximately the same level during the vegetation and flowering phases (26.78% and 27.26%, respectively), it falls during the fruiting phase (18.17%). The 18:1n9 acid is the major monounsaturated fatty acid. Its content peaks during the fruiting phase, and the lowest level is detected at the flowering phase. The 18:2n9,12 acid is the dominant polyunsaturated fatty acid. Its content peaks during the vegetation phase (26.78%), and the lowest level is detected during the flowering phase (24.23%). The total of unsaturated fatty acids exceeds the total of saturated fatty acids at every phase of plant development; however, their ratio changes depending on phenophase. For all of the studied samples, the content of phenolic compounds peaks during the flowering phase. Our findings show that the phase of mass flowering is characterized by the highest level of essential oil, lipids, and phenolics.
Lipids from Orostachys spinosa Nikolaeva, I. G.; Tsybiktarova, L. P.; Taraskin, V. V. ...
Chemistry of natural compounds,
09/2018, Volume:
54, Issue:
5
Journal Article
A neutron detector, providing charged particle detection capability, has been designed. The main purpose of the detector is to measure pulsed fluxes of both charged particles and neutrons during ...scientific experiments. The detector consists of commonly used neutron-sensitive ZnS(Ag) / 6LiF scintillator screens wrapping a layer of polystyrene based scintillator (BC-454, EJ-254 or equivalent boron loaded plastic). This type of detector design is able to log a spatial distribution of events and may be scaled to any size. Different variations of the design were considered and modelled in specialized toolkits. The article presents a review of the detector design features as well as simulation results.
The integration of a biochip with a PDMS fluidic chamber was accomplished. The advantage of dynamic analyte flows, versus static ones, was experimentally demonstrated. This was further clarified by ...numerical simulation including the approximate mathematical solutions modelling the convective motion and the biotinylated antibody-streptavidin interaction. The possibility of influenza virus A/California/07/09 (H1N1)pdm09 detection by the proposed method was demonstrated.
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