Copper supported on MWCNT-guanidine acetic acid@Fe3O4: synthesis, characterization and application as a novel multi-task nanocatalyst for preparation of triazoles and bis(indolyl)methanes in water

RSC Advances ◽  
2016 ◽  
Vol 6 (22) ◽  
pp. 18113-18125 ◽  
Author(s):  
Ahmad Shaabani ◽  
Ronak Afshari ◽  
Seyyed Emad Hooshmand ◽  
Azadeh Tavousi Tabatabaei ◽  
Fatemeh Hajishaabanha
Keyword(s):  
Carbon Nanotubes ◽  
Acetic Acid ◽  
Multi Wall Carbon Nanotubes ◽  
Dispersed Particles ◽  
Highly Dispersed ◽  
Highly Dispersed Particles

The synthesis of a new supported copper (Cu) nanocatalyst, with highly dispersed particles, based on magnetic guanidine acetic acid (GAA) functionalized multi-wall carbon nanotubes (MWCNT), Cu/MWCNT-GAA@Fe3O4, is reported.

The influence of highly dispersed preparations on metabolism and productivity of young cattle

2020 ◽  
pp. 22-33
Author(s):  
E. A. Sizova ◽  
A. M. Makaeva
Keyword(s):  
Trace Elements ◽  
High Surface ◽  
Live Weight ◽  
Animal Husbandry ◽  
Control Group ◽  
Dispersed Particles ◽  
Highly Dispersed ◽  
Young Cattle ◽  
Experimental Group ◽  
Highly Dispersed Particles

Preparations of highly dispersed particles of trace elements are increasingly used in animal husbandry. This is determined by their extraordinary biological properties such as the ability to penetrate into tissues and organs, a high surface area, and so on. One of the promising directions for using highly dispersed particles both in the post-embryonic and embryonic periods of animal development is the use of trace elements as sources. This is determined by the relatively lower toxicity, higher bioavailability of elements from preparations of highly dispersed particles, which reduces the load on the environment and allows you to produce products enriched with minerals. The purpose of the research was to study the effect of highly dispersed drugs on rumen digestion, the composition of the rumen microbiome, metabolism and productivity of young cattle. A comprehensive assessment of the use of highly dispersed SiO2 and FeCo preparations in cattle nutrition has been provided in the paper. The digestibility of feed, metabolism, and productivity of young cattle when feeding highly dispersed particles have been studied. An unusual fact of increasing bacterial biomass when using highly dispersed particles of silicon dioxide in animal feeding has been described. A method for increasing the digestibility of feed components by ruminants through the use of highly dispersed FeCo alloy particles has been proposed. As follows from the data obtained the use of highly dispersed particles allowed to increase the live weight of experimental young animals to 413 kg in the 1st experimental group and 416 kg in the 2nd experimental group, which was by 11 (P ≤ 0,01) and 14 kg (P ≤ 0,01) higher than the control indicator. As follows from the analysis of the data obtained, the profitability of rearing young animals in the 1st and 2nd experimental groups was by 2,4 and 2,2 % higher than the same indicator calculated for the control group.

Method and equipment for highly dispersed particles study

1993 ◽  
Author(s):  
Nikolai A. Konovalov ◽  
Nikolay I. Lakhno ◽  
N. E. Shishkov ◽  
L. P. Baranov ◽  
N. N. Golodnov
Keyword(s):  
Dispersed Particles ◽  
Highly Dispersed ◽  
Highly Dispersed Particles

scholarly journals Application of the Stabilizing Polymer Additives for Protection of Dump Overflow from Wind Erosion

2021 ◽  
pp. 026-039
Author(s):  
O. N. Dabizha ◽  
◽  
D. V. Bespolitov ◽  
N. A. Konovalova ◽  
P. P. Pankov ◽  
...  
Keyword(s):  
Polymer Solution ◽  
Mechanical Stress ◽  
Wind Erosion ◽  
Environmentally Friendly ◽  
High Quality ◽  
Average Mass ◽  
Dispersed Particles ◽  
Highly Dispersed ◽  
Overburden Dumps ◽  
Highly Dispersed Particles

The effectiveness of using the stabilizing additive StabOL for fixing the surface of overburden dumps has been studied. It was found that the average mass radius of supramolecular formations in the StabOL polymer solution is 593 nm. It was revealed that this polymer solution forms a high-quality film: transparent, homogeneous, without cracks and crystalline inclusions. The phase and granulometric compositions of overburden for the formation of organomineral aggregates of particles resistant to water and mechanical stress have been established. It is shown that the use of environmentally friendly polymer solution StabOL allows reducing the content of highly dispersed particles and is an effective way to protect dumping overburden from wind erosion.

RESEARCH OF SEPARATION GRADIENT AEROSOL TECHNOLOGIES FOR INTENSIFICATION OF HEAT AND MASS TRANSFER PROCESSES IN SYSTEMS OF HIGHLY TURBULENT DISPERSED BIPHASIC FLOWS. EMPLOYING THE SEPARATION GRADIENT AEROSOL TECHNOLOGIES FOR DESIGNING THE OIL SEPARATORS OF VENTING SYSTEMS IN GAS TURBINE ENGINES (G=200 m3/h)

2019 ◽  
pp. 75-84
Author(s):  
Wang Miao ◽  
Sergiy Ryzhkov
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Three Dimensional ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Three Dimensional Model ◽  
Flow Area ◽  
Dispersed Particles ◽  
Highly Dispersed ◽  
Highly Dispersed Particles

The aim of present study was to design an oil separator for the venting systems of gas turbine engines at consumption of gaseous medium 200 m3/h. In order to accomplish the objective, we applied separation gradient aerosol technologies, which consider all the forces and effects that influence deposition of the highly dispersed particles. A scientific base is substantiated for the intensification of gradient processes of the transfer of aerosol media in the boundary layers of multifunctional surfaces in the purification of dispersed polyphase flows for developing the technical devices that ensure an increase in energy saving and ecological improvement of power plants. We designed a section-by-section structural scheme and a three-dimensional model of the oil separator in finite elements for the calculation of hydrodynamics and separation. The calculations were conducted of the hydrodynamic situation and particle trajectory in the flow area of an oil separator. Using the calculated distribution of speed in the oil separator at G=100…200 m3/h, it was determined that velocity in the coagulation profile does not exceed 10 m/s. It was established according to the results of static pressure distribution for G=100, 200 m3/h that the pressure differential in the separation coagulators reaches 2.5…3.9 kPa, respectively. Results of the calculation at G=100…200 m3/h demonstrated that the summary pulsation effect from the deposition of highly dispersed particles amounts to 25.1 %. Based on the calculations, we designed the prototype of an oil separator and tested it experimentally on the test bench in the form of an open type wind tunnel. Coefficient of the total effectiveness of purification was determined, which reaches 99.9 %. The modernization of purifiers for capturing the aerosols in different systems of power plants is possible based on the separation gradient aerosol technologies. The studies conducted make it possible to develop in the future a range of separators for gas consumption from 20 to 2000 m3/h.

Curing of multicomponent thermoreactive binders in the presence of surfactant highly dispersed particles of a nanodiamond soot

2015 ◽  
Vol 57 (1) ◽  
pp. 39-48 ◽  
Author(s):  
E. P. Tikunova ◽  
Yu. V. Kostina ◽  
T. S. Kurkin ◽  
M. Yu. Yablokova ◽  
A. N. Ozerin
Keyword(s):  
Dispersed Particles ◽  
Highly Dispersed ◽  
Highly Dispersed Particles
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