微波预处理对梭木化机浆性能的影响探究

通过微波、水浴两种浸渍方式下木片吸液量的比较,探究了微波对松木渗透性的影响。在其它浸渍条件相同的情况下,经微波浸渍木片吸液量较水浴浸渍显著提高,微波处理5min即可达到水浴处理45min的吸液量,大大提高了浸渍效率。将微波用于化学机械法制浆的预浸渍阶段,经微波浸渍所得纸浆二段漂白白度最高可达68.9%ISO,较汽蒸保温提高3~6个百分点;在加拿大游离度为300mL时,抗张指数可达19 N•m/g,撕裂指数可达21.5 mN•m^2/g,耐破指数达0.8kPa•m^2/g0抗张指数平均提高3 N·m/g,撕裂指数约提高0.2 mN•m^2/g,耐破指数提高0.1 kPa·m^2/g左右.

内蒙古植物区系新增补

近些年来在内蒙古地区科研和考察时采集的植物标本中，发现内蒙古植物区系新记录种１９ 个，变种１ 个．隶属１１ 科１６ 属．标本存内蒙古大学自然资源研究所标本室（ＨＩＭＵ）．

The Beginnings of Higher Learning and Experimental Research in Brno

This article is written to celebrate the 95th anniversary of Laboratory of Water Management Research, Department of Water Structures, Faculty of Civil Engineering, Brno University of Technology, Czech Republic. Short trip to the history, a few words about the founder Prof. Smrcek and the laboratory works - education, projects, physical and mathematical modelling today.