Có 15+ tài liệu thuộc chủ đề "Fourier transform infrared spectroscopy"
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PIPERINE-LOADED CHITOSAN NANOPARTICLES:. Treatment of cardiovascular diseases has become one of the major focuses of scientific and technological development in recent years. In this paper, piperine-loaded chitosan nanoparticles (CTS-PIP NPs) were prepared by ionic gelation method.. The morphology of the prepared NPs was characterized by transmission electron microscopy image (TEM). The TEM analysis indicated that PIP-CTS NPs were spherical-shaped and...
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Acute renal ischemia-reperfusion (I/R) injury can be described as the damage occurring in ischemic renal cells after the reestablishment of the blood supply (Gao et al., 2018). Acute renal I/R injury is one of the pathological mechanisms underlying acute renal failure and is likely to occur following renal transplantation and septic shock (Gao et al., 2018). Zou et al., 2013)....
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The catalytic performance of different montmorillonite and organic modified montmorillonite catalysts was investigated in the dimerization of technical grade unsaturated fatty acid, and the influence of the catalyst structure and composition on the catalytic performance was analyzed. The results show that the layer spacing and dispersion property of the montmorillonite crystal have important effects on its catalytic performance and the...
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When the diisocyanate content was increased, deconvolution results of FTIR-ATR in C =O and N-H regions demonstrated better miscibility of the segments and XRD results showed a significant decrease in the crystallinity of soft segments. Flexible macrochains of polyols have low glass transition temperature (T g ) values and form the soft segments (SS), while hydrogen bonded urethane groups form...
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Modification of biomass-derived activated carbon with magnetic α -Fe 2 O 3 nanoparticles for CO 2 and CH 4 adsorption. Abstract: Magnetic and nonmagnetic activated carbons (ACs) were successfully prepared by using AC obtained from spent coffee grounds (SCGs) for use in CO 2 and CH 4 capture. SCGs were activated by chemical activation to produce ACs and a magnetic...
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on the mechanical properties of hydroxyapatite (Hap)- based nanocomposites (NCs). and/or Gel (Hap_Gel - 152 N/mm 2 ) as additives to reinforce Hap (106 N/mm 2 ) is more appropriate than the use of single functionalized multiwalled carbon nanotubes (Hap_fMWCNT_1.0 - 110 N/mm 2 ) and fullerene (Hap_Ful_0.5 - 106 N/mm 2. however, these mate- rials exhibit bioactivity significantly lower...
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Detection of lard contamination in five different edible oils by FT-IR spectroscopy using a partial least squares calibration model. In the present study, we designed a transmission Fourier transform infrared spectroscopy (FT-IR)-based method for the rapid detection of lard in sunflower, canola, coconut, olive, and mustard oils. A single calibration model was developed for 35 standards (seven standards from each...
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Investigation of the effect of PAn and PAn/ZnO photocatalysts on 100%. Abstract: PAn (polyaniline) and PAn/ZnO photocatalysts were synthesized using chemical polymerization of aniline.. The structure characterization of the synthesized samples was analysed by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-Vis spectroscopy measurements, and thermal gravimetric analysis (TGA)....
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doi:10.3906/kim-2006-25. Dye-sensitized solar cells (DSSCs), which consist of photoanode, photoactive paint, electrolyte, and counter electrode main materials, are called the new generation and attract attention with their low cost and easy production ability [1–4].. The studies that are carried out by producing modifications of the main materials still maintain a high level of interest in this subject. The importance of...
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56 September 2021 • Volume 63 Number 3. However, excess gastric acid can cause irritation, inflammation of the oesophagus, heartburn, and stomach ulcers [1].. There are few products containing pantoprazole for treatment of stomach ulcers in the Vietnamese market and most of them are formulated as pellets or enteric coated tablets.. in recent years, microspheres have become an effective solution...
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The cavity of the CD molecule is relatively non-polar compared to water, while the outer edge is polar due to the presence of hydroxyl groups on the faces of the structure. The chemical structure of the three native CDs α-, β-, and γ-cyclodextrin, are composed of 6, 7, and 8 glucose units, respectively. In an inclusion compound or complex, a...
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Abstract: Supported catalysts are of great interest because of their wide range of application possibilities. Supported catalysts have a wide range of applications in different fields. Support materials used in catalysis produce high surface area and better dispersion of the catalyst material. Supported catalysts can be prepared in 2 stages. 8 These 2 steps significantly affect the properties of the...
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These catalysts showed high efficiency for phosphine-free Mizoroki–Heck and Suzuki–Miyaura cross-coupling reactions with good diversity and generality. C–C bond formation is one of the most commonly employed chemical transformations generally used in both academic 1 and industrial chemistry. 5,6 Although homogeneous palladium complexes as conventional catalysts in cross- coupling reactions have shown high reaction rates, suitable turnover numbers, and sometimes...
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Adsorption of cellulase on poly(2-hydroxyethyl methacrylate) cryogels containing phenylalanine. Abstract: The aim of this study was to prepare a supermacroporous cryogel that can be used for the adsorption of cellulase. The cryogel was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and swelling tests. The effects of several parameters such as medium pH, temperature, ionic strength, and flow rate...
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Characterisation of chitin in the cuticle of a velvet worm (Onychophora). 1 Department of Biology of the Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany. However, at the latest after the final abandonment of the Articulata-concept and the establishment of the Ecdysozoa (e.g., Aguinaldo et al., 1997. Mallatt et al., 2004. Telford et al., 2008. Dunn et al., 2008. Borner et al., 2014), a...