The current study focuses on the use the gas tungsten arc welding (GTAW) with nickel-molybdenum (Ni-Mo) coated filler materials to weld 304L and 202L stainless steel (SS) joints. The improvement of welding strength heavily depends on the characteristics of the filler metal. The GTAW filler materials are coated with Ni and Mo to facilitate the welding process. The results of the filler metals Ni Mo-304, Ni Mo-202, Ni Mo-316, Ni Mo-308 are contrasted with the normal-304 and normal-202 filler metal. The surface structure of weldment produced by Ni and Mo 308 coated filler metal shows uniform distribution of filler material. Also, significant improvement is noted in tensile strength and Ni-Mo coated 316 has more % of elongation than other filler metals. The impact toughness of Ni-Mo 308 is 98 J which is 76 % higher than normal uncoated 304 filler metal. The average micro hardness of the Ni Mo -308 show improvement about 12 % than normal 304. Furthermore, Scanning electron microscope (SEM) images are taken over the weldment to analyse the heat affected zone (HAZ) of Ni and Mo combination weldment structures.
Hericium erinaceus, commonly known as “Lion’s Mane,” is widely edible, used for medicinal purposes, and has a long history of cultivation in China and Japan since 1990s. In this study, four strains of Hericium erinaceus (MFLUCC 21-0018, MFLCC 21-0019, MFLUCC 21-0020, and MFLUCC 21-0021) were grown for cultivation and proximate analysis. The mushroom was cultivated on three different substrate treatments, designed using a completely randomized design (CRD), harvested as fresh fruiting bodies, dried at 40–45 °C, and the total yield calculated. We pulverized the dried fruiting body for proximate composition and analyzed it according to standard procedures. The result showed that all H. erinaceus strains in three different substrate treatments produced mature fresh fruiting bodies when the temperature was 18–24 °C, while the second substrate treatment under conditions of the sawdust bag content 77% of para rubber sawdust, 15% of red sorghum, 3% of rice bran, 2% of yeast powder, 1% of lime (CaO), 1% of gypsum (CaSO4 • 2H2O), and 1% of molasses produced a high yield of 85.79–123.7 grams/bag. Proximate analysis of the dried mushroom powder showed high levels of protein content between 15.30% and 19.56%. The cultivation of H. erinaceus in Thailand is a significant achievement, as this type of mushroom is generally valued for its nutritional and therapeutic properties.
In order to improve the efficiency of biodiesel production from esterification of free fatty acids, an alternative to sulfuric acid has been explored in this study. These catalysts including three pyrrolidonium ionic liquids (ILs), 1-methyl-2-pyrrolidonium hydrogen sulfate ([Hnmp]HSO4), 2-pyrrolidonium hydrogen sulfate ([Hnhp]HSO4), and 1-(3-sulfonic acid) propyl-2-pyrrolidonium hydrogen sulfate ([C3SO3Hnhp]HSO4), were applied as catalysts to produce biodiesel through the esterification reaction of oleic acid with methanol. The catalytic performances of the synthesized ILs for the esterification of oleic acid were evaluated, and [C3SO3Hnhp]HSO4 exhibited the best catalytic activity among all tested acidic ILs. Moreover, the esterification of oleic acid with methanol by the [C3SO3Hnhp]HSO4-catalyzed was systematically explored, and the reaction conditions were further optimized through a single-factor experiment, the Plackett-Burman design, and a response surface methodology. It was found that optimum response for oleic acid conversion was 97.4% under reaction condition of using catalyst dosage of 12.5%, methanol/oleic acid molar ratio of 9:1, reaction time at 4 h and reaction temperature at 70 °C. In addition, the catalytic activity of [C3SO3Hnhp]HSO4 still remained high level after 5 cycles. In a conclusion, the IL [C3SO3Hnhp]HSO4 has great potential as a catalyst for producing fatty acid methyl esters via the esterification reaction.