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WebJan 19, 2024 · Introduction The solar energy of the sun has been an external power source to earth for 4.5 billion years. Around 3.4 billion years ago, the earth developed a method to store solar energy in chemical bonds through photosynthesis by cyanobacteria and later by plants. 1 Since the discovery of fire, humans have been using various forms of stored … WebSep 1, 2024 · 1. Introduction. Measurement of refractive index (RI) is the main key in chemical, biological and physical parameters determination such as glucose … hill rbf 3
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