نتایج جستجو برای: liquid mixture
تعداد نتایج: 303888 فیلتر نتایج به سال:
گیاه بعد از جمع آوری توسط گیاه شناس تأیید شد، سپس بخش هوایی آن خشک و پودر شده و عصاره تام متانولی آن به روش پرکولاسیون تهیه گردید. فراکسیون های اتردپترولی، کلروفرمی، اتیل استاتی، متانولی و آبی آن به ترتیب به روش liquid – liquid fractionation از عصاره تام تهیه شد. عصاره و فراکسیون های بدست آمده تغلیظ و در نهایت خشک شده و جهت بررسی اثر ضد باکتری در ظروف تمیز، تیره و در جای خنک نگهداری شدند. اثر ...
A conventional liner with a good performance against inorganic contaminants with a minimal hydraulic conductivity does not usually perform well for retention/removal of leachates containing organic contaminants. Organic modification of clay can render the naturally organophobic clay to be organophilic. Incorporation of modified organo clay along with unmodified inorganic clay in liner systems c...
Seven fluorinated and chlorinated terphenyl compounds intended for mid-wave infrared (MWIR) applications are synthesised and two eutectic mixtures formulated, and their physical properties evaluated. In addition to low absorption, some desirable properties for MWIR applications include wide nematic range, high birefringence, large dielectric anisotropy and low viscosity. The fluorinated terphen...
Prediction methods to evaluate liquid dynamic viscosity and thermal conductivity along the saturation line are presented in this paper for pure and mixed refrigerants. The thermal conductivity correlation presented here is an extension to the new refrigerants of an equation previously proposed by one of the authors. The viscosity correlation has been improved upon a previous version in order to...
Two experiments were performed to evaluate the effects of different levels of supplementation with a 50:50 (as-fed) mixture of molasses:crude glycerol on animal performance, total tract digestibility of nutrients, and ruminal in situ degradability of nutrients in beef heifers and steers consuming Tifton 85 Bermuda grass (Cynodon spp.) hay. For Exp. 1, 24 Angus crossbred heifers (380 ± 31 kg BW)...
Miniature hollow fibre modules were fabricated as phase contactors for liquid-liquid extraction. They were tested for americium(III)-lanthanide separation, using 2,6-di(5,6-dipropyl-1,2,4-triazin3-yl)pyridine or a synergistic mixture of di(chlorophenyl)dithiophosphinic acid and tri-n-octyl phosphine oxide as extractants. Americium could be removed from the feed phase to 99.95% using the former ...
A major computational code called CERV was developed to determine complex equilibrium compositions of a nonideal mixture of numerous imperfect gases and compressible liquid and solid species with phase transitions for closed-vessel applications. This code minimizes Gibbs energy using reaction variables, in contrast to other major codes like BRL-Blake, BRCBagheera and NASA-CEA that use compositi...
In a straightforward and fast protocol, a mixture of 1,3-dimethylimidazolium fluoride ([DMIM]F) and 1-butylimidazolium tetrafluoroborate ([Hbim]BF₄) efficiently catalyzed the reaction of epoxides with ketene silyl acetals (KSA) to give various γ-lactones under metal-free conditions. Diverse kinds of the desired γ-lactones were directly prepared with high regioselectivities and yields in a simpl...
Stimulated Raman scattering of toluene and its mixture with chloroform is studied in liquid-core optical fiber. The results show a remarkably broadened Raman line of the mixture from about 630 nm to 650 nm by a pumping wavelength at 532 nm, which is assigned to the interaction of CH vibrations of the two liquids. The results suggest that interactions between adjacent vibrations can produce stro...
a simple and environmentally benign procedure for the synthesis of 14-aryl-14h-dibenzo[a,j]xanthenes by a one-pot condensation of 2-naphthol with aromatic aldehyde in the presence of [et3nh][hso4] as an acidic ionic liquid catalyst under solvent-free conditions has been developed. the reaction work-up is very simple and the catalyst can be easily separated from the reaction mixture and reused s...
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