四种澳大利亚果蜡对芦柑的保鲜效应

本文研究了室温条件下4种澳大利亚水果蜡液--Castke875,Castke873,Citrus Clear及Carnauba Citrus对芦柑的保鲜效应．结果袁明：4种果蜡均能减少芦柑维生素C和,总酸的损耗,降低果实的失重率,但对总可溶性固形物和还原糖的影响都不明显．除此之外,Carnauba Citrus对保持果实外观品质及风味具有良好的作用,可有效延长保鲜时间;Citrus Clear其它效果不明显;Castke 875,Castke873两种果蜡则加速了果实的枯水、褐变、腐烂．因此,认为Carnauba Citrus的保鲜效果最好．     

用局部组成活度系数模型计算原油中石蜡沉淀量

准确描述固相的非理想性是计算复杂流体的气液固相平衡的关键。从原油中沉淀出来的石蜡多由正构烷烃组成 ,其晶格结构主要是正交相 (斜方晶格 ) ,特别是在低温时可能是惟一的晶格结构 ,而局部组成模型能够较准确地描述正交相的非理想性。将局部组成活度系数模型用于复杂石油流体中石蜡沉淀量的计算 ,并与正规溶液理论模型进行了比较。结果表明 ,对于高温石蜡沉淀量的计算 ,两个模型均能给出较好的结果 ,但对于低温石蜡沉淀量的计算 ,局部组成活度系数模型能取得较满意的结果。     

建始漆蜡的品质分析及棕榈酸的分离提纯

对建始漆进行了分析评价，对用皂化法从漆蜡中分离提纯棕榈酸进行了研究，结果表明，皂化反应最佳碱过量值为５５％（物质的量％），皂化率达８０％，产品纯度达９８％。     

沥青混合料压实试件毛体积密度测定方法的研究

沥青混合料压实试件毛体积密度的测定方法一直在道路工作地得中间存在争议，本文首先通过公式推导，在2种毛体积密度测量方法的原理进行了剖析，之后有针对性的对常见的矿料级配进行了大量试验，研究结果表明，密级配试件表干法比蜡封法更趋准确，但试件应充分浸水；对于开级配试件，蜡封法结果比表干法更为准确，但要保证水不会由于蜡的脱落而进入试件，同时温度不宜过高；对于表面坑洞较多的试件，加滑石粉可以替代试件的开口空隙而使结果更加准确，故对沥青碎石试件最好强制添加滑石粉，而且计算公式应参考本文推荐公式进行修正。     

High molecular weight (C35+)n-alkanes of Neogene heavily biodegraded oil in the Qianmiqiao region, North China

With wax content of 1.62%, heavy oil has been produced from the sandstone reservoirs of Neogene Guantao Formation (Ng1Ⅲ). In the GC and GC-MS RIC profiles of its aliphatic fraction, n-alkanes are totally lost, which shows the result of heavy biodegradedation. However, the remaining trace C13-C36 n-alkanes can be still seen from its m/z 85 mass chromatogram. In addition, a complete series of C35-C73 high molecular weight (HMW) n-alkanes was detected by high-temperature gas chromatography (HTGC). The HMW n-alkane series shows a normal distribution pattern, a major peak at nC43, obvious odd-carbon-number predominance, CPI37-55 and OEP45-49 values up to 1.17 and 1.16-1.20 respectively. The present study not only has conformed the strong resistibility of HMW n-alkanes to biodegradation in crude oils as concluded by previous researchers, but also has provided some significant information on source input and maturity for the heavily biodegraded oil in the Qianmiqiao region.     

GZL－3型液体鞋油的研制

为改进国内液体鞋油产品的质量，研制出用直接乳化蜡溶液，配以天然树脂Ｍ和合成树脂Ｎ，并添加各种助剂的工艺。结果表明：工艺技术是可行的，产品具有较好的自亮度和保护皮革的性能。     

接枝聚丙烯蜡对玻璃纤维增强聚丙烯界面作用

在聚丙烯蜡分子链中引入羧基官能团，并用其作为玻璃纤维增强聚丙烯的界面处理剂。通过改进的单丝临界长度法测定了四处偶联剂与上述聚丙烯蜡共同处理的玻璃纤维与聚丙烯的界面剪切强度，发现改性或者未改性的聚丙烯蜡的加入都会使增强体系界面剪切强度明显提高，分析其原因可能是未改性的聚丙烯蜡分子链上本身含有一定的极性基团。但是，偶联剂种类的变化对体系界面剪切强度的影响却很小。     

白蜡虫马氏管胞内结晶的研究

报道了白蜡虫马氏管胞内细胞质的绝大部分为两种矿质所占据。一种为不规则状结晶，占结晶总量的７０％，大小不一，含有尿酸及Ｓｉ，Ｐ，Ｃｌ，Ｆｅ，Ｃ，Ｚｎ和Ｓ等矿质元素。另一种为年轮状结晶，占结晶总量的３０％，其体积料大，含尿酸及Ｃｌ，Ｃａ，Ａｌ等Ｃｕ等矿质元素，起源于线粒体。     

Lacustrine biomass: An significant precursor of high wax oil

Since high wax oils are normally related to terrestrial depositional environment, the concept that high wax oils are derived from terrigenous organic materials has been widely accepted[1,2]. Recently, Hsieh et al.[3,4] studied oils from different depositional environments and ages and suggested that waxy compounds were not restricted to any type of environment or source material. There is a variety of possible sources for the formation of HMWHCs, in-cluding high plant cuticular waxes, blue-g…