Papers by Keyword: Organic Compound

Abstract: This research focuses on bibliometric analysis using R Studio and Bibliometrics as tools for data collection and evaluation related to advances and trends in developing organic-based composite materials with polymeric matrices. The importance of this analysis lies in understanding how these materials require a well-defined matrix that acts as a continuous phase, providing resistance to compressive stress while facilitating interaction with the discontinuous phase to withstand tensile forces. Additionally, it is essential to objectively establish the reinforcing fibers that make up the dispersed phase, as they protect the material against environmental factors and mechanical agents, preventing negative effects such as wear, buckling, and compressive stress. Proper selecting phases is crucial when evaluating the results obtained about the estimated values. Thus, one of the main challenges in formulating polymeric compositions for composite material development is the accurate identification of matrices along with the supporting material. As a result of the challenges associated with the production of these materials, this research confirms, through bibliographic analysis, the increasing exploration of such composites, their impact on various fields throughout history, the technical difficulties inherent in their fabrication in many proposed cases, and the costs involved in their manufacturing.

Abstract: Arachis hypogaea (AH) and Cocos nucifera (CN) surfactant were examined as corrosion inhibitor for 316L steel in 9 M HCl solution by weight loss (WL) method. Observation from the results showed that the presence of the active components and functional groups were actually the reasons for strong adsorption performance of AH and CN inhibitors as the corrosion rate was drastically retarded with increment in percentage inhibitor concentrations. Though AH inhibitor showed better efficiency than CN inhibitor due to more active components as revealed by the phytochemical analysis test. ATF-FITR test demonstrated all the potential functional groups accountable for the excellent inhibitions of AH and CN inhibitors. Keywords: Organic compound; Corrosion rate; Active components; Functional groups. ATF-FTIR spectroscopy.

Abstract: The main reasons which caused the water pollution in canals, especially in Khlong Prem Prachakorn, are untreated, and improperly treated household, accumulation from flood situation in Bangkok. Soil sediment accumulation in canal contain many types of organic compounds. However, contaminant that causes an increase health risk is the mostly concern. This research was performed to investigate the organic compounds in household wastewater removal under biodegradation, and adsorption mechanisms by using soil sediment taken from Khlong Prem Prachakorn, Bangkok, Thailand. For the adsorption experiment, inactivated sludge was used for determining adsorption capacity of soil sediment. The samples were slowly mixed at 30 rpm and taken at constant time intervals for the determination of biological oxygen demand (BOD), and chemical oxygen demand (COD) reduction. The influent BOD, and COD concentration were found 63 mg/l, and 354 mg/l, respectively. The results indicated that the concentration of BOD, and COD were decreasing rapidly by both biodegradation and adsorption mechanisms within 12 h. In this research, the biological activity by microorganisms in soil sediment as an important role and helped to remove organic compound in household wastewater.

Abstract: Coking wastewater treatment has a complex composition and the properties of high content of refractory organics and poor biodegradability. Coking wastewater treatment based on oxidation technique has drawn a lot of attention because of its advantages. Various common oxidation methods are reviewed in this research, such as wet air oxidation, chemical oxidation, ozonation and electrochemical oxidation. The development prospect of coking wastewater treatment based on oxidation methods is analyzed.

Abstract: This paper presents the method of obtaining in conditions of ultra speed solidification of Al-Ni alloys with high Ni content on purpose to search the catalytic action of the NiAl₃ as a separate compound. It is characterized to catalyze from Ni-Al alloy ultra rapid solidificated in fibers with lengths between 20-40 μm.

Abstract: DAST (4-dimethylamino-N-methyl-4-stilbazolium tosylate) crystal material was synthesized and purified by a relatively simple method. The synthesis process was easy to operate experimentally and the cost of raw materials can be cut down. The purification process was much easier than the previously published method. Fourier transform infrared spectrum (FTIR) was used to analyze the functional group of raw material and no extra functional groups were found. Nuclear magnetic resonance (NMR) study was performed to identify the different modes presented in the compound. The results showed that the quality of the prepared crystal raw material could meet the requirements on crystal growth. DAST crystals were grown from the synthesized raw material by slowly cooling method. The crystal structure was characterized by X-ray diffraction (XRD) study and the results showed that the crystal grown from the synthesized raw material was the same as that grown from pure DAST crystal raw material.

Abstract: In this paper, maleopimaric acid anhydride (MPA) has been synthesized by the Diels-Alder addition reaction between abietic acid and maleic anhydride. Single crystal X-ray diffraction analysis reveals that MPA crystallizes in the polar space group P2₁ and contains one MPA and one DMF (Dimethylformamide) molecule in the asymmetric unit. MPA is firstly found to be a new type of low-molecular-mass organic ferroelectric with the saturation spontaneous polarization (P_s) about 60.0-61.6 μC·cm^-2 for single crystal samples, which is close to that of typical inorganic ferroelectric materials. MPA·DMF also shows second-order NLO property, with the second harmonic generation (SHG) responses approximately 0.5 times that of urea.

Abstract: The polyhedral crystals, octahedral crystals and cube crystals of Zinc hydroxystannate (ZHS) were prepared by the homogeneous precipitation synthesis method. The organic compounds, PEG-400, β-cyclodextrin (β-CD) and L-alanine were added in the reaction systems to control the crystal structure. The crystal structure and morphology of products were characterized by SEM and XRD. The crystal structure of all products could be attributed to the cubic ZnSn(OH)₆ by the XRD analysis. The SEM pictures of the products were different with the change of organic compounds. The FTIR spectrum indicated the ZHS without organic residual and the possible formation mechanism was discussed.

Abstract: Mass transfer around a slightly soluble cylinder, aligned with the direction of liquid flow in a packed bed of sand particles, is analysed for transport by advection and molecular diffusion. The theoretical analysis applies to cylinders that are large in comparison with the inert particles, so that the bed may be treated as a continuum. Experimental measurements of mass transfer in water were carried out at temperatures that differ significantly from ambient value. The soluble cylinders used in the experiments were made of either salicylic acid or cinnamic acid and the range of temperatures covered were 278 to 343 K, for the dissolution of salicylic acid, and 278 to 328 K, for cinnamic acid in water. Using the mass transfer theory presented in this work the molecular diffusion coefficient of the two solutes was determined, and good agreement with literature values was found.