耐磨三聚氰胺甲醛树脂的制备及性能表征

采用超声波法将5种纳米耐磨材料分散于三聚氰胺甲醛树脂(MF树脂),制备浸渍装饰纸层压板;并采用傅里叶变换红外光谱法和差示扫描量热法等对改性的MF树脂进行分析.结果表明:分散4次最合适;MF树脂最低耐磨转数为1600转,最高耐磨转数为2500转;耐磨材料的加入使得MF树脂的粘度、接触角增大,耐磨性能提高.     

家具表面涂饰及其对产品质量和环境的影响

通过对我国家具的发展沿革和木质材料表面涂饰工艺及应用材料的论述,阐明了我国家具市场还有很大的发展空间;特别是在工艺流程和漆面涂饰上只要严把每一环节的质量、材料、环保、技工关,我国家具就能成为世界的家具强国。     

木塑复合材料的市场动态

国内木塑市场潜力巨大,木塑这种可充分利用低值资源的高附加值产品,能为人力、资金、原料等资源找到最佳表现位置。随着我国天然木材资源日益减少,巨大的需求终究会敲开国内木塑材料的市场大门。     

水冷振动炉排秸秆锅炉调研情况

通过调研把生物质水冷振动炉排锅炉和点火系统以及输料和给料系统情况记录下来,帮助以后对秸秆发电技术的设计和改进。     

Evaluation of Factors Influencing the Generation of Ammonia in Different Bedding Materials Used for Horse Keeping

Bedding material is an important factor in determining stable air quality in terms of ammonia formation. The objective of this study was to analyze different bedding materials used for horse stables under standardized conditions, to determine which material is best suited for improving the climate of a stable. The particular concern was a reduction in gaseous ammonia concentrations. Therefore, the following materials were examined: wheat straw, wood shavings, hemp shives, linen shives, wheat straw pellets, and paper cuttings. Twelve containers were constructed in an environmentally controlled room, and the same material was placed into two containers, with the amount of material used being determined by its carbon content. A defined ratio of horse manure/urine mixture was added daily to each container over a period of 14 days. The concentrations of gaseous ammonia, carbon dioxide, nitrous oxide, and water vapor were measured continuously above the bedding within the containers. Means of gaseous ammonia were found to be 178.0 mg/m³ for wheat straw, 155.2 mg/m³ for wood shavings, 144.6 mg/m³ for hemp, 133.7 mg/m³ for linen, 60.3 mg/m³ for straw pellets, and 162.6 mg/m³ for paper cuttings. In conclusion, the results of this study have shown that straw pellets are suitable for horse stables, not only to improve air quality but also, first and foremost, in relation to ammonia binding and ammonia transformation within the bedding material, respectively. However, straw pellets may also have disadvantages. The high substrate temperatures that were measured in straw pellets could favor the growth of pathologic germs that can adversely affect animals' health.     

黄土丘陵区退耕还林（草）生态经济系统的能值分析

能值分析方法是惯用的评价生态系统能量输入输出的方法之一。本文以位于陕西省黄土丘陵区的安塞县为例，通过分析该区域退耕还林（草）前后生态系统投入产出的能值动态变化，定量评价了退耕还林（草）工程的生态经济效应。研究结果显示：受退耕还林工程的影响，安塞县生态系统年总投入能值和总输出能值均呈先下降后上扬的发展趋势，其中有机能和不可更新环境资源投入量表现出递减的趋势，说明退耕还林工程对于减少表土流失具有积极的作用；在总能值产出中，种植业和养殖业的能值产出占绝对优势，但随着退耕还林工程的开展，林业的能值产出表现出快速的增长势头，系统的结构日趋多元化；在系统主要能值指标中，能值投资率、环境负载率呈现先增后降再增长的趋势，净能值产出率和能值持续性指数均呈先降低再增长的趋势，系统稳定性呈现增加的趋势。说明退耕还林后系统的生态环境压力趋于减小，持续性增强，系统结构趋于稳定，系统功能协调，基本可以实现生态和经济双赢的目标。     

试论新时期校园物质文化景观的教育功能与建设

校园物质文化景观作为一种隐性课程 ,以潜移默化的方式对学生产生巨大影响而受到教育工作者的普遍关注。从内涵、教育功能、建设等方面对校园物质文化景观进行了分析     

春期原种催青日期的确定

阐述了春期原蚕种催青日期确定的原则 ,列举了浙江省和全国主要蚕区历来春期原种催青开始日期     

春谷(粟)抗粒黑穗病优良种质材料的创新研究

通过不同类型抗性亲本杂交选育和连续人工接菌鉴定，创新出４份对粒黑穗病免疫和高抗、且农艺性状优良的育种材料，可提供育种单位利用。     

加网混合料疲劳特性的研究

为了探讨路面结构层中加入纤维格栅后的疲劳特性，就ＡＣ１３Ｉ型的细料式沥青混合料加网与不加网２种情况进行了疲劳对比试验，分析了试验结果，得出了加网与不同加混合料的疲劳方程以及我后同等应力水平下混合料疲劳寿命提高６倍结论。