The hard outer portion or surface area of bread. 面包皮面包的表面区域的硬皮
The BET surface area of CA could achieve 340.1m2/g. 炭化树脂的BET比表面积可达340.
The pore size and specific surface area of ACFs were decreased after fluorination.The adsorption isotherm of nitrogen on ACFs were evidently reduced. 氟化后活性炭纤维的孔结构和比表面积变小,氮低温吸附等温曲线明显降低。
The results show that these treatments lead to many micro-pores and increase BET surface area (TSA) and BJH cumulative adsorption pore volume (BPV). 研究结果表明：氧化处理会使纤维表面产生大量的孔洞，增加BET比表面积和BJH累积孔体积，提高表面吸附能力；
The adsorption of s urfactant on the grain stabilized the fine grain, led to increasing the specific surface area and promoting the rate of reaction. 同时，表面活性剂的吸附降低了固液界面张力，使颗粒细化，从而提高了反应的比表面积，促进了反应的进行。