Boonyarattanakalin, Kanokthip
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Boonyarattanakalin, Kanokthip
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BOONYARATTANAKALIN, Kanokthip
Boonyarattanakalin, K.
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kanokthip.bo@kmitl.ac.th
10 results
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Item type:Publication, Assessment of the Utility of Chitosan in Drug Delivery of Sulfamethoxazole(2024-01-01); ; The objective of this research was to develop chitosan (CS) nanoparticles (NP) and microfibres (MF) for oral delivery applications related to low solubility drugs. The ionic gelation method in conjunction with freeze-drying was used to produce crosslinked chitosan material. Dynamic light scattering (DLS) was used to characterize particle size and polydispersity index (PDI). Surface morphology was analyzed using scanning electron microscopy (SEM). The antibiotic drug sulfamethoxazole (SMO) was loaded onto the chitosan nano/micro material. The degree of loading, loading efficiency and the release kinetics were investigated using high-performance liquid chromatography (HPLC) and UV-visible spectrophotometry, respectively. We found that CS nanoparticles have the potential to improve the delivery properties of SMO due to their more rapid release compared to microfibres or traditional tablet formulations. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorbed protein on P25 nanoparticles-synthesis, characterization and electrochemical property(2018-09-05) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of seeding layer thickness on physical and morphological structure of Ga/F co-doped ZnO nanostructures(2017-01-01); The effects of seed layer thickness on structural properties and morphology of Ga/F co-doped ZnO nanostructures were investigated in this work. The seed layers with various thicknesses were deposited on glass substrates by dip-coating. It is hypothesized that a certain range of seed layer thickness can significantly alter the outcomes of the morphological structure, density, and shape of the as-synthesized nanostructure products. The Ga/F co-doped ZnO nanostructures were grown on these seed layers by a hydrothermal process using Zn(NO<inf>3</inf>)<inf>2</inf>, NH<inf>4</inf>F, GaN<inf>3</inf>O<inf>9</inf> and hexamethyltetramine. The effects of seeding layer thickness on morphologies and structural properties were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and UV-Vis spectroscopy. More detailed studies to clarify the seed layer effect on the growth of Ga/F co-doped ZnO nanostructures are further discussed. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Investigation on influence of seeding layer on morphological properties of ZnO-based nanostructure prepared by hydrothermal process(2018-01-01); In this present work, bare ZnO low-dimensional structures were synthesized by hydrothermal process with crystal growth assistance using seed layers. Different seeding layer species including ZnO and Ga-doped ZnO films prepared by sol-gel dip coating were introduced onto the substrate before the hydrothermal growth of ZnO-based nanostructures. Zn(NO<inf>3</inf>)<inf>2</inf> and GaN<inf>3</inf>O<inf>9</inf> were utilized as Zn and Ga source during hydrothermal process. The influence of seeding layer types on morphological and shapes of the hydrothermally grown nanostructures have been extensively scrutinized by Field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and optical spectroscopy. It was revealed that different morphologies and exceptional shapes in form of nanorods of ZnO-based nanostructures were obtained as different seeding layers were introduced. More detailed studies for clarification of seed layer effect on the growth of ZnO-based nanostructures are mentioned and discussed. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of F incorporation on physical and optical properties of hydrothermally grown ZnO nanorods(2018-01-01); F-doped ZnO nanorods were synthesized via hydrothermal process with variation of Fluorine doping contents (0-10%) starting from zinc oxide thin film as a seeding layer for nanorod growth. The zinc oxide seeding thin film was prepared by sol-gel spin coating at 2000 rpm on glass substrate using zinc acetate precursor with annealing at 500°C in air for 2 h. Ammonium fluoride (NH<inf>4</inf>F) was used as F doping precursor. The properties of F-doped ZnO nanorods were characterized by field emission electron microscope (FESEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and UV-Visible spectrophotometer. Corresponding results indicated that growth of ZnO:F nanorods with good crystallinity and grown in (002) plane in undoped ZnO and F-doped ZnO 5%. The average size diameter of undoped and F-doped ZnO nanorods at 3%, 5% and 10% are 56, 96, 70 and 103 nm, respectively. From cross section images the average length of undoped and F-doped ZnO nanorods at 3%, 5% and 10% are 400, 375, 199 and 478 nm, respectively. The transmittance spectra shows moderate transparency (<80%) of the ZnO nanorod film in visible region with corresponding band gap range of 3.25-3.28 eV. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Extraction and characterization of nanocellulose from sugarcane bagasse by ball-milling-assisted acid hydrolysis(2018-09-05); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optical characteristics of samarium doped ZnAl2O4 nanomaterials synthesized by vibrational milling process(2018-01-01); ; ; Ishihara, Keiichi N.Optical and fluorescence properties of samarium (Sm) doped zinc aluminate host matrix (Sm:ZnAl<inf>2</inf>O<inf>4</inf>) was studied. Sm:ZnAl<inf>2</inf>O<inf>4</inf> nanopowder was synthesized by vibrational milling process assisted with calcination treatment. Structural and optical properties of Sm:ZnAl<inf>2</inf>O<inf>4</inf> nanopowders were investigated via the crucial parameter of different doping concentration. Structural properties of as-synthesized samples and Sm: ZnAl<inf>2</inf>O<inf>4</inf> powders were characterized by X-ray diffraction and scanning electron microscope. For optical properties, Sm: ZnAl<inf>2</inf>O<inf>4</inf> phosphor materials were analyzed via diffuse reflectance and photoluminescence spectroscopy. The preliminary results suggested that Sm: ZnAl<inf>2</inf>O<inf>4</inf> powders were identically in spinel crystalline phase as host ZnAl<inf>2</inf>O<inf>4</inf> structure affirmed by XRD result. SEM images indicated the Sm:ZnAl<inf>2</inf>O<inf>4</inf> after the synthesis distinctly obtained in ultrafine power due to the effect of several milling round and sintering process. The optical properties in reflectance mode of Sm:ZnAl<inf>2</inf>O<inf>4</inf> samples were significantly increased by the presence of Sm dopant in ZnAl<inf>2</inf>O<inf>4</inf> structure. Meanwhile, the luminescent materials showed red emissions under visible light excitation in range of 650-730 nm by PL spectra. The improvement of ZnAl<inf>2</inf>O<inf>4</inf> photoluminescence property was obviously obtained at 0.5 wt.% Sm due to photon transfer from Sm to host material. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, TiO2 Hybridized with Natural Ilmenite Nanocomposites for Enhanced Visible Light Photocatalytic Activity(2019-09-16); The activated ilmenite nanocomposite of TiO<inf>2</inf> hybridized were prepared by natural ilmenite and commercial TiO<inf>2</inf> anatase assembled using sugar as cross-link agents and carbon source. The heterostructure interface of anatase-ilmenite junction, crystallinity and chemical state were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy (XPS). Composite morphologies and structures were investigated by scanning electron microscope (SEM). Synergistic of low energy gap in range of visible light and interfacial charge separate from TiO2 to ilmenite junction was evaluated in photocatalytic degradation of organic dye. The result from visible light catalytic dye degradation suggests that narrow bandgap energy is associated to ilmenite phase and sensitization by carbon with low recombination rate of generated electron-hole pair transfer. This mechanism occurred by multiphase junction could enhance visible light photocatalytic activity. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Investigation on the interactions between glucomannans and bifidobacterium protein by using molecular dynamics simulations(2018-01-01); ; Konjac glucomannan is a polysaccharide extracted from the Amorphophallus konjac K.Koch plant. It is often used as food additives due to their low toxicity, biodegradability and low calories. The unique properties of konjac glucomannan is its prebiotic activities. Konjac glucomannan which cannot be digested and absorbed in human stomachs and small intestines. Therefore, it is fermented in the large intestine and becomes food for the beneficial bacteria or probiotics especially bifidobacteria and lactobacilli in human colons. This study examined the effect of the size of konjac glucomannan on the prebiotic property. The interactions between the different degrees of polymerization of konjac glucomannan and Bifidobacterium protein were investigated in 0.15 M sodium chloride solution at 310 K by using molecular dynamics simulation. The results have shown that water molecules dramatically affect the alignment of konjac glucomannan in the system. The active site of Bifidobacterium protein that determined by the calculations are composed of ASP154, ARG49, ASN206, and ASN401. The lowest flexibility of GM5 structure shows strong interactions with Bifidobacterium protein. The most suitable size of konjac glucomannan that can bind with the protein has the degrees of polymerization no more than 8. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of UV-induce ozone treatment on physics and morphological properties of hydrothermally grown Ga-F-codoped ZnO nanostructure(2018-01-01)