The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Particles transport driven by a temperature gradient in a solution is known as thermophoresis or Soret effect. The drift velocity <alternatives>${\bi v}_{\rm T}$<mml:math overflow="scroll"><mml:msub><mml:mrow><mml:mi mathvariant="bold-italic">v</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">T</mml:mi></mml:mrow></mml:msub></mml:math><inline-graphic xlink:href="MNL.2017.0130.IM1.gif" /></alternatives>...
Carrot root has been used for medicinal purposes from ancient times, being well known its beneficial properties as follow: anti-inflammatory, anti-diabetic, antioxidant, hypoglycemic oil of carrot. The paper presents a study regarding an extraction method of volatile oil from carrot root using microwave energy and ethyl alcohol as a solvent. The yield of extraction was examined in a series of experiments...
The main objective of this work it is to highlight the possibilities of substitution of all or a part of the current technology with technology of extracting by using microwave energy and to highlight the existence differences in quality of the extracted oils for different temperatures using as solvent the ethyl alcohol. In this paper is studied the essential oil extraction method that was performed...
The article considers the perspectives of processing of dense bituminized oil sludge with microwave radiation, including using solvents. The peculiarities of using solvents in the processing of dense bituminized oil sludge with the use of microwave energy are disclosed. The analysis of the obtained results of processing of dense bituminized oil sludge, comparison with the previously obtained results...
In this paper we have synthesised the stability and robustness performance of MIMO compensator design for which the whole set of latent-structure can be assignment via the approaches of Block root placement technique. The purpose is to provide a comparative study between the Block pole structures in term of system response, and how can they affect the compensator structure meting a desired criteria.
In this paper we have synthesised the stability and robustness performance of MIMO compensator design for which the whole set of latent-structure can be assignment via the approaches of Block root placement technique. The purpose is to provide a comparative study between the Block pole structures in term of system response, and how can they affect the compensator structure meting a desired criteria.
Solder paste is the most important strategic bonding material used in the assembly of surface mount devices in electronic industries. Rheology of solder paste is the most important parameter which affects the paste printing process, the reflow soldering performance, and wherefore the resulting solders joint quality and reliability. A clear understanding of the complicated interactions among various...
Solder pastes are widely used as a principal bonding medium in the electronics industry. Many paste parameters, such as paste composition, printing stencil aperture and reflowing profile, influence the printing performance and the reflow process of solder pastes. In this paper, experiments are conducted to investigate the effect of filmogens and solvents on slump-in-heating resistance of Sn-3Ag-0...
Heavy oil has a high viscosity, so production form heavy oil reservoir is very difficult. One of the methods which are used to increase recovery factor from this reservoirs is miscible injection. Among miscible injection methods is vapor extraction method via injection the vapor of hydrocarbon solvent which is a suitable constitute for thermal methods in reservoir where heat loss is high. The vapor...
Sn-3.5Ag nanosolder in tiny sizes can provide a practical way to solve the high soldering temperature problem of lead-free solder alloy in fine pitch interconnectivity owing to the unique nanosize effect and meantime stand a higher working temperature just as the bulk material after welding. In this paper, a simple approach to synthesis Sn-3.5Ag nanoparticles by chemical reduction at room temperature...
Sn-3.5Ag nanosolder in tiny sizes can provide a practical way to solve the high soldering temperature problem of lead-free solder alloy in fine pitch interconnectivity owing to the unique nanosize effect and meantime stand a higher working temperature just as the bulk material after welding. In this paper, a simple approach to synthesis Sn-3.5Ag nanoparticles by chemical reduction at room temperature...
In order to fabricate high performance polymer solar cells, donor:acceptor mixture must be prepared using a proper solvent. Since solubility of C60, as a truly cost effective acceptor, is very limited in common solvents, finding a suitable solvent can enhance the Poly(3-hexylthiophene):C60 (P3HT:C60) based solar cell performance in terms of short circuit current (JSC), fill factor (FF) and consequently...
We propose an energy-based method for dissolution simulation. Both the fluid (solvent) and solid (solute) are presented by particles. The dissolution priority of solute particles is based on the kinetic activation energy. The position of solute is determined using rigid body dynamics. We demonstrate plausible dissolving behaviours by using examples.
Near infrared (NIR) transmission spectroscopy has been widely used for quantitative analysis in different solvents system. Lower limit of quantification (LLOQ) of NIR in solvent of different hydrogen bonding capability has not been reported. This paper was to investigate the LLOQ of NIR for citric acid in different solvents (ethanol, water, acetone, DMSO) combined with partial least squares (PLS)...
Azeotropic distillation is a special case of multicomponent distillation used for separation of binary mixtures which are either difficult or impossible to separate by ordinary fractionation. It is commonly used to separate close boiling mixtures with far fewer trays than in conventional distillation and with less circulation, resulting in lower equipment and energy costs. It is widely used for the...
Bio-oil is liquid fuel produced by fast pyrolysis, typically, of biomass. Bio-oil comprises a mixture of highly oxygenated compounds, carboxylic acids and trace water. Upgraded bio-oil can be used as a substitute for conventional fuels. However, bio-oil is inherently unstable. The various compounds in bio-oil can react through many chemical reactions, such as polymerizations, during the storage of...
A new analytical method was demonstrated for the determination of trace tetracycline (TC) in medicine by phase-separation floatation(PSF) coupled with an ultraviolet detector setting at 383 nm. TC can be transformed into binary complex(Mg-TC) in the conditions of magnesium(II) which can be separated by phase-separation floatation easily. The optimum phase-separation floatation was performed on phase-separation...
In this research, results of an experimental study of prickly ash seed cust oil on the preparation of fatty acid methyl ester by lipase catalysis were presented. Factors such as n-hexane, the FAME rate, water concentration, volume of lipase, et al were studied. The experiment results showed that n-hexane is most suitable solvent in the non-aqueous lipase catalytic system and the FAME rate reach the...
Flower-like cobalt microstructures have been prepared on a large scale at 80°C using absolute ethanol as solvent and hydrazine as reducing reagent. No surfactant or additive was used during the synthetic process. These cobalt microflowers with size about 4 μm composed of many nanorods radiated from the core. The as-obtained product was characterised by X-ray diffraction, scanning electron microscopy...
Supercritical water (SCW) is water at conditions above the critical point (typically 600°C, 25 MPa). SCW is used as coolant in the primary circuit of one of the new concepts of nuclear reactors. Supercritical water has unique properties and very low price enables its use as chemical environment as well as reactant taking part in chemical reactions. These reactions lead to very interesting products...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.