One of the most common methods used to enhance dissolution is the preparation of solid dispersions. Solid dispersions of LOV and silica with different surface areas were prepared. The effects of the type of silica, ratio of drug/silica, incubation period with silica, and the effect of surface ...
In this work, the silica content of different types of rice grains were measured. Here, we used the heteropoly blue photometric method with a double beam UV–vis spectrophotometer to determine the amount of silicon in rice samples ( n = 7) that were collected in the north of Iran. The ...
Among nanomaterials, silica (SiO2) nanoparticles (NPs) have received considerable attention as a possible alternative to conventional insecticides. The insecticidal properties of silica NPs are thought to be due to direct abrasion of the insect cuticle8,9,10or sorption through the cuticular layers2. ...
With the very dense greywackes, on the other hand, it was not possible to localize the cause of gel formation. However, where there was a high proportion of the aggregate even small quantities of alkali silica gel were sufficient to damage the concrete. The swelling pressures burst the ...
Barbuta M., Effect of different types of superplasticizer on the properties of high strength concrete incorporating large amounts of silica fume, Bulletin of the Polytechnic Institute of Iasi, Construction and Architecture Section, 2005;51 (1-2): 69-74....
The compression strength of the silica material increased logarithmically with the amount of kaolinite. A compression strength of 4.6 and 6.4 MPa could be measured for kaolinite to mica ratio of 0.8 and 10 repectively. Independent to these results, a compression strength ...
The esterification activity of the immobilized lipase was defined as μmoles of the ester formed per min per g matrix at 50 °C. 2.8. Analysis of acylglycerols MAG, DAG, and TAG were analyzed by Thin Layer Chromatography (TLC) (Fuchs et al., 2011, Jin et al., 2017). Silica gel ...
There are also several different types of slurries used in the CMP process. The most common abrasives used are silica (SiO2), alumina (Al2O3), ceria (CeO2), titania (TiO2), and zirconia (ZrO2). The abrasives are formed using two different methods that result in fumed and colloidal abras...
Sustained research and development work on the utilization of waste (fly ash and silica fume) for various productive uses have been carried out. In the construction industry, major attention has been devoted to the use of fly ash and silica fume in concrete as addition to or as cement replace...
The four concrete types used were fly ash concrete mixture, silica fume concrete mixture, normal Portland Cement (NPC) concrete mixture with a water/cement ratio (w/c) of 0.32 and a 0.52 w/c ratio concrete mixture. Each type of these concretes has three different types of steel embedded ...