黄土状粉土液化模拟中的微结构分析

本文运用扫描电镜（ＫＹＫＹ—１０００Ｂ）对室内配制的黄土状粉土液化的微结构分析表明：粘粒含量为９％的粉土微结构为支架式胶结，在力的作用下，抗液化能力最差。其原因为以支架接触式胶结粉粒的粘土颗粒所起的“润滑作用”所致。此理论为今后进一步研究粉土液化机理提供了重要依据。     

化学药剂对桦木干材的防腐效力

本文叙述了桦木的方法。试验用三种化学药剂涤抹桦木被害部位观察防腐效果。应用BCM,BBF和CCB防治曲霉菌、青霉菌和木霉菌均有较好效果,其中BCM的防治效果最好,BBF次之,CCB较差。     

Bedding hygiene,cleanliness and lying behaviour for heifers housed on wood chip or straw deep bedding

The aim of this project was to compare the hygienic quality of the bedding, as well as the parasitic load, cleanliness and lying behaviour in heifers kept on either straw or wood chip deep bedding. Fourteen heifers kept in two pens were housed on straw or wood chip bedding for 43 days, after which the bedding material was switched for 43 additional days. Significantly more mould was found in wood chip than in straw and there was a tendency towards less yeast in wood chip. The heifers had a low faecal parasitic load. The results indicate that the wood chip treatment resulted in somewhat cleaner animals. The heifers had a significantly longer total lying time when kept on straw. In conclusion, wood chip deep bedding could be an option as bedding material, but the impact on hygiene of bedding material and lying behaviour needs to be further investigated.     

木粉改性对木粉-橡胶复合材料界面结合性能的影响

将杨木木材加工中剩余的边角料及木材加工利用不了的枝丫材加工成木粉,对杨木粉进行热处理、碱处理、偶联剂KH550改性处理后,与轮胎橡胶复合制备木粉-橡胶复合材料,分析杨木粉改性后对木粉-橡胶复合材料界面结合以及性能的影响。结果表明:3种改性方法,均不同程度地提高了复合材料的拉伸强度、硬度、回弹性和耐寒性。碱处理的断裂伸长率提高,碱处理和偶联剂处理的耐磨性变好、界面结合更好;热处理大幅度改善了材料的吸水性,其中热处理后24 h的吸水质量增加率只有0.4%,比未处理降低42.86%。     

金果梨凝胶软糖制作工艺研究及模糊数学综合评价

为了提高金果梨的原料利用率,本研究以金果梨、明胶、果胶和卡拉胶为材料,研制了金果梨凝胶软糖.采用质构分析和模糊数学综合评判法,研究了食用胶的种类、添加量以及浓缩梨汁的可溶性固形物含量对金果梨凝胶软糖的质构特性和感官品质的影响.结果 表明,随着明胶添加量和金果梨浓缩汁可溶性固形物含量的不断增大,金果梨凝胶软糖成品的硬度明...     

海门口遗址饱水古木酚醛树脂加固效果评价

采用小分子酚醛树脂对60根海门口遗址饱水古木进行加固处理,测定加固后古木的加固收缩率、物理力学性能、表面接触角、甲醛释放量、抗流失性等性能,并将其各项评价指标与未加固古木和健康木材进行对比。结果表明：加固后古木呈浅红褐色;平均加固收缩率横向为914%,纵向为417%;基本密度由016g/cm3增加至029g/cm3;顺纹抗压强度由367MPa增加至3778MPa;三切面的表面接触角均明显增大,加固古木的表面疏水性明显增强;采用穿孔萃取法测定加固古木的甲醛释放量为1915mg/100g,因此贮存及展示环境须密封;抗流失试验中质量损失率为547%,试件中的酚醛树脂大部分固定在古木中。研究中经酚醛树脂加固后的古木各项性能均有明显提高,能够满足古木下一步的运输、贮存及展示的要求。     

短轮伐期雷林1号桉木材材性变异研究

研究了７－８年生雷林１号桉木材密度及化学成分在株间和株内的变异规律，及施肥措施对木材密度及化学成分的影响。径向的变异，木材密度和纤维素含量由髓心向外呈增加趋势，分别由髓心处的０．５０５ｇ／ｃｍ＾３和４２．８８％增加到树皮附近处的０．５６０ｇ／ｃｍ＾３和４４．９１％；木素及多戊糖含量则呈减小趋势，分别由２６．５４％和１８．０３％减小到２５．９４％和１６５．５５％。树干度高方向的是，木材密度是由基部向     

镶拼木地板生产刀具国产化的研究

本文对引进的镶拼木地板生产设备进行刀具国产化研究，试制替代刀具６种类型每套共１５片，其中主要矛盾为开料机刀具，对其基体变形、掉齿、超差、耐用度等进行分析，替代刀具取得显著的经济效益和社会效益     

Sorghum endosperm texture – A review

A review of literature on endosperm texture determination and its relationship with milling performance is presented. Methods for measuring sorghum endosperm texture as abrasive, pearling and wet milling are reported. This review describes some indirect methods: time to grind by the Brabender microhardness tester (BHMT), resistance to grinding by the Stenvert hardness tester (SHT), two methods for determination of average particle size: particle size index (PSI) and near-infrared (NIR) reflectance and others based on density differences between the floury and vitreous part of the endosperm.     

竹木复合中密度纤维板工艺条件的研究

研究了竹木纤维混合比、空比和纤维筛分值工艺条件对木复合中密度性能的影响。结果表明，在合适的工艺条件下，可以生产出具有优良性能的竹木复合中密度纤维板。竹木复合中密度纤维板的静曲强度、弹性模量和吸水厚度膨胀率随竹木纤维混合比的增大而增大；而平面抗拉强度在０／１～１／１范围内随竹木纤维混合比加大模量和吸水厚度膨胀率随竹木纤维混合比为１／１时，ＩＢ最小。板的静曲强度、弹性模量、平面抗拉强度和吸水厚度膨胀率