Moriya Regina Y, Gonçalves Adilson R, Faria Fabrícia P
Departamento de Biotecnologia, FAENQUIL, CP 116, CEP 12600-970, Lorena, SP, Brazil.
Appl Biochem Biotechnol. 2005 Spring;121-124:195-203. doi: 10.1385/abab:121:1-3:0195.
Organosolv (ethanol/water and acetosolv) pulps were treated with Humicola grisea var. thermoidea and compared with Cartazyme HS xylanase-treated pulp. The ethanol/water pulps treated with H. grisea had the same viscosity as unbleached pulps (8 cP). Ethanol/water pulps treated with Cartazyme had higher viscosity than H. grisea-treated pulps (12 cP). Acetosolv pulps treated with H. grisea and Cartazyme presented a reduction in viscosity; however, the pulps treated with H. grisea had a lower reduction in viscosity than Cartazyme-treated pulps. Ethanol/water pulps treated with H. grisea had a 23% reduction in kappa number in 4 and 8 h of treatment, compared with the unbleached pulps. Cartazyme-treated pulps had a kappa number similar to that of the control pulps for 4 h of treatment. Extending the treatment time to 12 h resulted in a reduction of 33%. The acetosolv pulp treated with H. grisea had a kappa number reduced to 23% in 4 h. Cartazyme treatment resulted in a reduction of 55 and 44% in kappa number for 4 and 8 h of treatment, respectively, when compared with control pulp. Extending the treatment time to 12 h decreased the kappa number 72%. Fourier transform infrared spectra and principal component analysis showed differences among unbleached, H. grisea-treated, and Cartazyme-treated pulps.
用嗜热栖热放线菌处理有机溶剂制浆（乙醇/水和乙酸制浆），并与用Cartazyme HS木聚糖酶处理的纸浆进行比较。用嗜热栖热放线菌处理的乙醇/水纸浆与未漂白纸浆具有相同的粘度（8厘泊）。用Cartazyme处理的乙醇/水纸浆比用嗜热栖热放线菌处理的纸浆具有更高的粘度（12厘泊）。用嗜热栖热放线菌和Cartazyme处理的乙酸制浆粘度均有所降低；然而，用嗜热栖热放线菌处理的纸浆粘度降低幅度低于用Cartazyme处理的纸浆。与未漂白纸浆相比，用嗜热栖热放线菌处理的乙醇/水纸浆在处理4小时和8小时后卡伯值降低了23%。用Cartazyme处理的纸浆在处理4小时时卡伯值与对照纸浆相似。将处理时间延长至12小时，卡伯值降低了33%。用嗜热栖热放线菌处理的乙酸制浆在4小时内卡伯值降至23%。与对照纸浆相比，用Cartazyme处理的纸浆在处理4小时和8小时后卡伯值分别降低了55%和44%。将处理时间延长至12小时，卡伯值降低了72%。傅里叶变换红外光谱和主成分分析表明，未漂白纸浆、用嗜热栖热放线菌处理的纸浆和用Cartazyme处理的纸浆之间存在差异。
