太阳能红外中草药干燥工艺优化研究

用太阳能红外综合干燥装置和自动测试仪器，对秦艽（Ｇｅｎｔｉａｎａ ｍａｃｒａｐｈｙｌｌａ）、黄芩（Ｓｃｕｔｅｌｌａｒｉａ ｂａｉｃａｌｅｎｓｉｓ）、丹参（Ｓａｌｖｉａ ｍｉｌｉｏｒｒｈｉｚａ）进行干燥特性试验，并进行温度、相对湿度、物料脱水量的动态连续测量。结果表明，较合理的工艺是在干燥初期将空气流体相对湿度控制在５０－６０％，匀速干燥阶段控制在４０％－４５％，降速干燥阶段迅速将室内空气温度降至与     

高温薄层干燥玉米应力裂纹的试验与分析

本文进行了玉米高温薄层干燥试验，分析应力裂纹的形成机理，探讨干燥条件对应力裂纹生成和发展的影响规律．结果显示，应力裂纹的形成与干燥、冷却和储存过程中升温、降温及水分迁移有关，尤其是干后玉米内部水分的重新均匀化过程．籽粒内部的水分梯度造成的籽粒不同组成部分受压和受拉是产生应力裂纹的主要原因。应力裂纹仅仅是内部裂纹，只在胚乳中存在，沿着淀粉颗粒边缘发展．干燥介质温度、速度和样品的初始及终了水分对应力裂纹的发生和发展有重大影响。     

离心流化床干燥器中传热传质的实验研究

在不同操作条件下对离心流化床干燥器中湿物料的干燥过程进行了间歇实验研究，测定了气流入口、出口和床层温度以及物料湿含量时间的变化，分析了表观气速、颗粒直径、床层厚度、床体转速和物料初始湿含量对干燥过程的影响，获得了离心流化床干燥过程中传热和传质准则方程。     

采用出口空气再循环的流化床谷物干燥系统模拟

建立了采用出口空气再循环的流化床谷物干燥系统数学模型，以大麦为物料分别计算了各种不同工况下采用出口空气循环时谷物干燥的能耗及费用等，并就各种计算结果进行了比较与讨论，所得结果对流化床谷物干燥系统参数的确定具有参考价值。     

微波干燥制备纳米TiO2的光催化降解活性研究

采用钛酸丁酯的溶胶-凝胶法及微波干燥制备了纳米TiO2光催化剂。通过XRD和BET进行了晶型、平均粒径和比表面积分析表征。以水杨酸为模拟污染物对其进行光催化降解活性实验研究表明，UV光照40min水杨酸降解率达到97％，催化剂重复使用4次水杨酸降解率仍能达到94％。     

依托药材资源优势 做大做强药材产业——对陇西县中药材产业和发“药财”的可行性探讨

陇西中药材产业在区位、市场、仓储、资源等方面有着许多优势,并已成为全县四大支柱产业之一,但是目前农民未能真正发上“药财”。文章着重从全县中药材产业发展的机遇、优势、前景、思路等方面进行探讨,并为进一步做大做强中药材产业提出有效措施。     

Some evidence of drying trend over northern China from 1951 to 2004

The surface wetness index, Palmer drought sererity index and the retrieval of soil moisture over China were calculated using monthly precipitation and monthly mean surface air temperature. Based on the contrast analysis of the variation of the above three indices and precipitation, the dry/wet spatio-temporal pattern of northern China in the last 54 years was revealed, and the evidence of drying trend over northern China was analyzed, especially. The results show the following four facts: (1) The drying trend is the main characteristic of the eastern part of Northwest China and the central part of North China since the 1980s and it was enhanced in the last 15 years mainly due to the precipitation decrease and the temperature increase; (2) During the last 54 years, there was only one dry/wet shift at the interdecadal scale occurring in the eastern part of Northwest China and the central part of North China in the late 1970s, which was related to 1977/1978 global abrupt change, whereas there were three shifts in Northeast China, one was in the mid 1990s and the other two were in 1965 and 1983, respectively; (3) Unlike the variation trend of other subregions of northern China, the western part of Northwest China is currently located in a relatively wetting period, which is weak-ened due to the temperature increase; (4) The extreme drought frequency is obviously increasing in the eastern part of Northwest China, the central part of North China and Northeast China since the 1980s, which is closely related to the precipitation decrease and temperature increase in these subregions.     

中药贮存与养护

中药含有淀粉、糖类、蛋白质、脂肪油、纤维素、鞣质等成分，如果贮藏不当，易发生霉烂，虫蛀、走油及变色等变质现象．其中尤以霉烂和虫蛀对药材的危害性最大，不仅在经济上会造成损失，更严重的是使中药降低疗效，甚至完全丧失药用价值．因此，研究中药科学保管，对保证病人用药安全，减少药材损耗均具有重要意义。     

三用干燥热泵表面式蒸发器模拟计算

研究了三用干燥热泵表面式蒸发器模拟计算过程。须特别注意的是：不同运行状态时蒸发器析湿系数不同；蒸发器最佳翅片表面温度的确定方法及结构计算合理性判定等。     

芝麻种子的合理贮藏

要保证芝麻种子的发芽率和食用品质,必须做到合理贮藏.芝麻种子贮藏的关键是控制水分和温度的变化.芝麻种子贮藏的安全水分一般为7%左右.水分过高时,种子容易发热,引起霉菌寄生和虫蚀.因此,种子入库贮藏前必须做好以下几项工作.