Biochar is a type of charcoal produced by heating crop wastes , wood or other biomass in a simple kiln designed to limit the presence of oxygen .
生物炭是农作物废料、木材或其它生物质在简易窑(为限制氧存量而设计的窑)内经过加热而制成的一种炭。
Chemists use infrared spectrometers to uncover chemical clues such as the unique infrared signature of each calcite mineral layer -- information that helps archaeologists figure out whether they 're looking at a floor , wall or kiln .
Titan wood has developed a technique for converting hydroxyl groups into acetyl groups ( a different combination of atoms ) by first drying the wood in a kiln and then treating it with a chemical called acetic anhydride .