نتایج جستجو برای: some such alkali treatments as naoh
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in reality, most structures involved in geotechnical engineering are three dimensional in nature, and although in many, plane strain or axisymmetric approximations are reasonable, there are some, for which 3-d treatment is required. the quantity of data, and the size of the various vectors and matrices involved in such analysis, increase dramatically. this has sever implications for computer r...
Magnetite nanoparticles (Fe₃O₄) represent the most promising materials in medical applications. To favor high-drug or enzyme loading on the nanoparticles, they are incorporated into mesoporous materials to form a hybrid support with the consequent reduction of magnetization saturation. The direct synthesis of mesoporous structures appears to be of interest. To this end, magnetite nanoparticles ...
Abstract Sewage sludge-based porous materials were prepared through an integrated and energy-saving procedure that combines chemical activation with alkali (NaOH or K 2 CO 3 ) physical in a single step. The study was conducted wide temperature range (600–1000 °C), using higher temperatures than those commonly used. From the standpoint of textural properties, impregnation results decrease optimu...
Abstract While natural resources are becoming scarce and climate change is accelerating, the recovery recycling of wastes by-products an effective way to deal with economic ecological constraints recent decades. The valorization industrial in civil engineering a common practice either by their incorporation during manufacture Portland cements or as partial replacement cement production concrete...
Abstract The purpose of this study was to evaluate the possibility using ground waste-expanded perlite (WP) as a sustainable replacement for granulated blast-furnace slag (GGBFS) precursor in alkali-activated systems. nature and amount hydration products, microstructure, compressive strength development were investigated mixtures where GGBFS substituted with 10, 20 40% by weight WP activated tw...
Increasing the concrete alkali content from 0.6% to 1.25% of Na2Oe of the cement mass by adding NaOH to the mixture water has harmful effects on most mechanical properties (compressive, splitting, direct tensile, and flexure strengths) of concrete made with a water-tocement (w/c) ratio of 0.41 and limestone aggregates not susceptible to alkali–silica reaction (ASR), however not on the elasticit...
Carbohydrate units of cell-surface glycoproteins of mouse B- and T-lymphocytes, labelled in their sialic acid residues by the periodate/NaB3H4 method and in their galactose residues by the galactose oxidase/NaB3H4 method after neuraminidase treatment, have been studied. Glycopeptides were prepared from the labelled cells by Pronase digestion and fractionated by concanavalin A affinity chromatog...
we commence by using from a new norm on l1(g) the -algebra of all integrable functions on locally compact group g, to make the c-algebra c(g). consequently, we find its dual b(g), which is a banach algebra so-called fourier-stieltjes algebra, in the set of all continuous functions on g. we consider most of important basic theorems about this algebra. this consideration leads to a rather com...
Optimization of alkali concentration in the pretreatment of sugarcane bagasse for ethanol production
This study was aimed for the investigation of effect pretreatment procedure alkaline, based on chemical arrangement, surface morphology, structural composition and enzymatic assimilation sugarcane bagasse sugars ethanol production. Alkali (0 to 8% w/v NaOH) assists reduce lignin portion (from 19.57±0.03% 9.91±0.02%) increase cellulose content treated SB 34.66±0.05% 63.58±0.05%) simultaneously. ...
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