| 摘要 |
<p>PURPOSE:A freshness preservative rapidly adsorbing an extremely large amount of ethylene gas becoming a denaturing gas component of vegetables and fruits and keeping freshness of plant for a long period, obtained by treating a porous carrier with bromine and a hydrogen halide. CONSTITUTION:A porous carrier (preferably active carbon having >=100m<2>/g specific surface area) is treated with bromine and a hydrogen halide (preferably by gas phase adsorption method) to give the aimed preservative. The amounts of bromine and a hydrohalogenic acid or a gas thereof retained per carrier are preferably 5-40wt%, respectively.</p> |
