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NEPCMs for Heating Applications
Published in S. Harikrishnan, A.D. Dhass, Thermal Transport Characteristics of Phase Change Materials and Nanofluids, 2023
Thermofisher Laboratories Scientific Private Limited, India, provided palmitic acid (melting point 60–62°C). Table 7.3 shows the thermophysical characteristics of palmitic acid. The nanomaterials embedded PCMs of 0.1, 0.2, and 0.3wt%. TiO2 NPs were prepared using a two-step technique. During the preparation of nanomaterials embedded PCMs, it was vital to include certain properties such as continuous dispersion, low particle agglomeration and no chemical fluid modification. Sodium dodecylbenzene sulfonate (SDBS) was the capping agent utilized for the uniform dispersion of NP in palmitic acid.
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Published in Natan B. Vargaftik, Lev P. Filippov, Amin A. Tarzimanov, Evgenii E. Totskii, Yu. A. Gorshkov, Handbook of Thermal Conductivity of Liquids and Gases, 2020
Natan B. Vargaftik, Lev P. Filippov, Amin A. Tarzimanov, Evgenii E. Totskii, Yu. A. Gorshkov
Palmitic acid CH3(CH2)14COOH. Table 25.4 shows the thermal conductivity values which are based on the data obtained in refs. [183, 184] and are thought to be accurate to within 2 percent. These values can be correlated by the equation: () λ⋅103=240−0.218T.
Carboxylic Acids, Carboxylic Acid Derivatives, and Acyl Substitution Reactions
Published in Michael B. Smith, A Q&A Approach to Organic Chemistry, 2020
Oleic acid is cis-9-octadecenoic acid. Palmitic acid is hexadecanoic acid. Stearic acid is octadecanoic acid. What is the product of the “partial hydrolysis” of hexanenitrile?
Phytochemical characterization, antioxidant and antibacterial activities of crude extracts of Anisomeles malabarica and Coldenia procumbens
Published in Journal of Toxicology and Environmental Health, Part A, 2023
Ramalingam Revathi, R. Akash, Ramasamy Mahadevi, Singaravel Sengottuvelu, Palanisamy Mohanraj, Natesan Vijayakumar, Rajapandiyan Krishnamoorthy, Mohammad Z. Ahmed, Shadab Kazmi, Ramamoorthy Kavitha
Most of the components identified in this plant aqueous extract previously detected by Mancini et al. (2015) were noted to exhibit pharmaceutical beneficial values and used for some industrial applications. For example, 2-pentanethiol displayed marked antimicrobial, anti-tumor, immune modulatory, and antioxidant activities (Mancini et al. 2015). Isopropyl decanoate was employed as a food additive and a flavoring agent in various foods (Mohan et al. 2020). The d-glycero-d-galactoheptose exhibited the potential to act as beta-galactosidase-inhibitor, CNS-depressant, and anti-cancer agent (Elagbar et al. 2016). Palmitic acid is a well-recognized bioactive component and is commercially used in pharmaceutical industries as major ingredient to produce drugs for antioxidant activity, and may be utilized to treat metabolic syndromes including obesity, type 2 diabetes mellitus, cardiovascular diseases, and cancer (Carta et al. 2017). Parthipan, Suky, and Mohan (2015) reported that 9,12-octadecadienoic acid exhibited significant anti-coronary, anti-cancer, anti-hypercholesterolemic, hepatoprotective, and 5-alpha reductase inhibitor activities.
Performance of NiMo-Al2O3 catalyst in biokerosene production via hydrocracking of dirty palm oil
Published in International Journal of Ambient Energy, 2022
Luqman Buchori, W. Widayat, Oki Muraza, Aji Prasetyaningrum, Jedy Prameswari, Aditya Widiyadi, Gema Adil Guspiani
First, the double bonds of the triglycerides present in the dirty palm oil (feedstock) will be saturated with hydrogen transforming into palmitic acid (C16:0) and oleic acid (C18:0) (Table 1). In the second stage, the hydrogenated triglycerides will form substances including monoglycerides, diglycerides and free fatty acids, then subsequently converted into deoxygenated products. There are four pathways that will convert free fatty acid into n-alkanes (Veriansyah et al. 2012). Palmitic acid (C16H32O2) is deoxygenated via decarboxylation pathway which converts the carboxylic acid group in free fatty acid into straight-chain alkanes which then produced n-pentadecane and released CO2 gas. Then followed by the decarbonylation path, where the carboxylic acid groups contained in free fatty acids react with hydrogen to produce 1-pentadecene and form CO gas and water. Alkanes produced through the decarboxylation and decarbonylation pathways will have an odd number of carbon atoms, while the alkanes from the hydrodeoxygenation pathway will produce an even number of carbon atoms. Based on the chromatogram result (Figure 3), n-pentadecane (nC15) is the relatively abundant component in the liquid product, hence it can be concluded that the dominant pathway in this hydrocracking reaction is the decarboxylation/decarbonylation pathway (Hermida et al. 2016).
Enhanced Removal of Lead from Soil Using Biosurfactant Derived from Edible Oils
Published in Soil and Sediment Contamination: An International Journal, 2021
Sangeetha V, Thenmozhi. A, Devasena M
Significance analysis of effectiveness of vegetable oils at 99% confidence limits obtained a p-value of 0.7 (p > .01) indicating no significant difference between palm and gingelly oil in lead removal as depicted by Figure 1.The 50% of saturated fatty acids of palm oil consists of 44% palmitic acid (C16:0), 5% stearic acid (C18:0); 40% unsaturated fatty acid as oleic acid (C18:1), and 10% polyunsaturated fatty acid comprising linolenic acid (C18:2) and linolenic acid (C18:3) (Montoya et al. 2014). Gingelly oil is composed of 9.1% of palmitic acid (C16:0), 37.4% of oleic acid (C18:2), and 46.9% of linolenic acid (C18:3) (Gharby et al. 2017). Studies by Jadhav et al. (2019) and Zhang, Pemberton, and Maier (2014) have proved that biosurfactant production was directly related to the length of fatty acids up to C18 with an increasing order of linolenic acid, oleic acid and palmitic acid. Hence the influence of gingelly oil in removal of lead was higher as it is composed of 80% unsaturated fatty acids. According to Thaniyavarn et al. (2006), although biosurfactant production was less with palm oil, it readily lowers the surface tension than the biosurfactant produced using coconut and olive oil. Hence, the greater removal of lead in the current study was due to the surface tension lowering capacity of palm oil. Salamat, Lamoochi, and Shahaliyan (2018) attained 82% lead removal efficiency using biosurfactant derived from B.subtilis in a span of 2.5 hours and pH maintained at neutral. Lead Removal efficiency of 95.5%, 82%, and 75.52% was attained in a period of 28 days using different biosurfactants such as Bios-40 (rhamnolipid Bios-40), Bios-12 (disulfoglycolipid Bios-12), and Bios-30 (glycolipid Bios-30) respectively (Elemba and Ijah 2016).