Tulang ayam pada dasarnya memiliki kandungan kalsium yang tinggi, secara umum sumber kalsium yang tinggi dapat digunakan sebagai bahan dasar pembuatan hidroksiapatit. Hidroksiapatit (HAP) merupakan merupakan keramik yang bersifat biokompatibel, bioaktif dan bioresorbabel, dimana HAP sering digunakan sebagai material substitusi tulang atau gigi. Pada review ini, membahas tentang potensi tulang ayam digunakan sebagai bahan dasar dalam sintesis hidroksiapatit (HAP) mengenai karakterisasi secara kimia dan fisik untuk mengetahui potensi kelayakan HAP dari tulang ayam sebagai pelapis implan gigi. Gugus fungsional, kristalinitas, ukuran pori dan uji secara in vitro menunjukkan syarat terpenuhinya HAP layak sebagai implant Karakteristik HAP berpotensi memberikan efek yang menguntungkan ketika digunakan sebagai implan gigi atau pelapis implan gigi. Permukaan berpori dari HAP berperan penting dalam memberikan peningkatan interkoneksi mekanis yang mengarah pada fiksasi implan yang kuat.

The rapid development of industry causes the need for fuel and energy to increase, especially fossil fuels (petroleum). This has the effect of an energy crisis. Biomass is of particular concern as one of the renewable energy sources to address the current energy crisis.  Biomass consists of hemiselulose, cellulose, and lignin that can be converted into liquids (bio-oils) of pyrolysis. One of the wastes that can be converted into bio-oil is tobacco waste. Tobacco waste is produced by more than 2 million tons eachs. The waste has the potential to be further processed into bio oil using fast pyrolysis method with efficient and quality bio-oil manufacturing measures. The bio-oil results from tobacco waste using the fast pyrolysis method have values of carbon, hydrogen, nitrogen, oxygen and other organic compounds and the H/C ratio is greater than the yield of tobacco waste bio-oil using the low pyrolysis method. Where the bio-oil of tobacco waste using the fast pyrolysis method has a high heating value equivalent to the distribution of hydrocarbons from biodiesel, which means it has the potential as an alternative energy to replace petroleum. The potential as a substitute fuel for petroleum must also be balanced with fast and efficient production, maximizing bio-oil production by selecting the reactor and the optimum temperature usedKeywords: Waste, Tobacco, Bio-Oil, Renewable Energy, Fast-pyrolisis