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Zinc (Zn) is an essential micronutrient for plant health, yet its availability in soils grapples with limitations imposed by diverse factors. Nanotechnology offers a promising approach to enhance Zn delivery and uptake by plants, as well as to improve their tolerance to abiotic stress. However, the current literature lacks a comprehensive overview of the research trends and progress on Zn nanoparticles (ZnNPs) for mitigating abiotic stress in plants. In this study, we conducted a bibliometric analysis based on 6932 records from the Web of Science Core Collection published in the past 20 years (2000–2020). Our objective was to unravel key insights into the most influential countries, institutions, journals, authors, and pivotal keywords steering the trajectory of ZnNPs research in the context of mitigating abiotic stresses in plants. Beyond this bibliometric exploration, we reviewed the synthesis methods, applications, and mechanisms of ZnNPs for enhancing plant growth and photosynthesis under various abiotic stress conditions. Our findings underscored that China, India, and Iran were the leading countries in ZnNPs research, with green synthesis emerging as the predominant method for ZnNPs production. We also found that ZnNPs improved plant tolerance to abiotic stress by modulating various physiological, biochemical, and molecular processes. We discussed the challenges and opportunities for future research on ZnNPs for sustainable agriculture.

ABSTRACTIn this work, Friction Stir Welding (FSW) is used to study the impact of different pin tool geometries on hardness, microstructure, and tensile strength of welded AA6061 and AA7075 butt joints. H13 steel-tool including three distinct pin geometries, i.e. threaded cylindrical (THC), straight cylindrical (SC), and tapered cylindrical (TAC) are used for welding. The welds were produced using a spindle speed of 1800 rpm and welding speed (traverse speed) of 15 mm/min by a customized clamping system. As shown by the hardness test, the welded sample using the threaded pin tool geometry produces more hardened joints than other geometries of the pin tools. As analyzed by the tensile strength experiment performed on the Universal Testing Machine (UTM), the samples welded by threaded pin give higher ultimate tensile strength, i.e. 282 MPa compared to other tool geometries. A fine grain structure was also observed in the nugget zone of welded joints obtained by threaded pin.

The article focuses on nutritional value and benefits of tomato consumption. Topics discussed include tomato being vital source of magnesium, iron, potassium and minerals, its use as ingredients of many dishes, presence of pigment lycopene which has antioxidant property and is singlet oxygen quencher, a research revealing presence of natural toxic compounds in them such as alpha-tomatine that helps in integrity of digestive system and promotion of good vision through presence of Vitamin A.