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تعداد نتایج: 22300 فیلتر نتایج به سال:
The characterizations of the anhydrate (A-form), monohydrate (B1-form), and dihydrate (B2-form) of CS-834 were investigated by powder X-ray diffraction, differential scanning calorimetry (DSC), thermogravimetry-differential thermal analysis (TG-DTA), infrared spectroscopy, and Karl Fischer moisture titration. The typical DSC curve of the B2-form showed five endothermic peaks at 35.0, 46.4, 56.2...
As a by-product generated from the processing of corn, the production in China of corncob (CC) is abundant, with up to 3.87 million tons per year. The biomass gasification industries make use of the CC residue as feedstock, but large volumes of generated corncob ash (CCA) requires daily disposal. In this study, CCA was characterized by laser particle size analyzer (LPSA), X-ray fluorescence (XR...
the present work deals with the synthesis and characterization of cds nanoparticles with good thermal stability and optical properties by a novel and simple synthetic route. the nanoparticles were synthesized via chemical precipitation method in a single reaction vessel under ambient conditions. the prepared cds nanoparticles were compared with the bulk cds. the optical properties were determin...
[Zn(CH3COO)2 + PVP]/[C2H5O)4Si + PVP]/[SnCl4 + PVP]/[Ti(OC4H9)4 + CH3COOH + PVP] precursor composite fibers have been fabricated through self-made electrospinning equipment via electrospinning technique. ZnO/SiO2/ SnO2/TiO2 composite nanofibers were obtained by calcination of the relevant precursor composite fibers. The samples were characterized by thermogravimetric-differential thermal analys...
Momordica charantia is a species cultivated throughout the world and widely used in folk medicine, and its medicinal benefits are well documented, especially its pharmacological properties, including antimicrobial activities. Analytical methods have been used to aid in the characterization of compounds derived from plant drug extracts and their products. This paper developed a methodological mo...
Chemical changes that occur in concrete at the microstructure level due to environmental effects are normally identified by SEM, XRD, thermal analysis and by chemical analysis. In the present investigation, the chemical compounds formed in various chemical reactions are quantified using thermal analysis. The concrete having characteristic compressive strength of 20 MPa was subjected to undergo ...
Portland cement is the one of the main ingredients in the manufacture of many building materials include concrete composites. The phase composition of hydration products is controlled by means of XRD and DTA/TG analysis. Observations of phase changes and microstructure of maturing cement pastes can also be observed using scanning electron microscopy (SEM) techniques combined with chemical analy...
The development of nanomaterials and nanotechnology enables the production nanosized metallic alloys with advanced characteristics from their oxides via a thermal reduction technique. aim present work was to produce iron, nickel, tungsten through gaseous metal oxide powders as preliminary step towards fabrication heavy unique properties. Nanosized NiO, Fe2O3, WO3 were isothermally non-isotherma...
A considerable amount of carbon dioxide is released during the preparation traditional Portland cement, which not in conformity with sustainable road. Developing supplementary cementitious material (SCMs) and reducing cement consumption are safe ways to solve this problem. Iron tailings (IOTs), a type mining waste from beneficiation process iron ore concentrate, can be used as SCMs concrete. In...
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