适应割制改革,探索制胶新途径

通过论证和生产性试验 ,以胶园长流胶和凝胶为原料 ,分 2 2批加工为 15t标准胶 ,其理化指标均达到GB/T80 81- 1999规定的SCR5标准 ,证实胶园凝胶生产SCR5是可行的 ,也解决了胶园长流胶增多给常规生产工艺带来的种种困难     

GDN—1高效低毒脲醛树脂胶新工艺的研究

脲醛树脂胶是胶合板生产的主要胶粘剂,占总用量的80%以上。其优点是成本较低,不污染板面,有一定的耐水强度。但在树脂合成、调胶热压、贮存等过程中所释放出的游离甲醛,污染空气,损害人体健康。胶合板甲醛释放量为6～29.6mg/l。我们于1985年9月至1986年3月对国内几个厂家生产的胶合板,用24小时干燥日法测定结果     

蛋白质木材胶黏剂

现代木材工业界用来制造刨花板、纤维板、胶合板及定向刨花板等的胶合剂都依赖石化原料。石化原料未来因为供应有限,价格必定高涨,并且法令对木质复合材料排放有毒气体的限制越来越严格,木材工业界不得不积极评估使用可再生的生物原料来合成环境友善的木材胶黏剂。笔者先讨论了蛋白质胶黏剂的历史背景及沿革,进而讨论蛋白质的化学特性以期了解其化学交联的可能性,最后再详述近年来蛋白胶改性的研究及成果。     

野皂荚豆胶的研究

将野皂荚中分离出的多糖胶加以提纯,对其化学、物理性质进行了研究,提纯的多糖是均匀的,经测定,多糖是由半乳糖和甘露糖组成,其配比为1：3.2,化学结构为：主链以β-（1,4）-苷键连接的D-吡喃甘露 糖和支链以α-（1,6）-苷键连接的D-吡喃半乳糖。     

乳状分散松香胶的研制和试产

对乳状分散松香胶制备工艺：分散体选择和用量、乳化温度、转相温度、助剂进行了研究，并在此基础上进行了试产，制得效果较好的产品．     

不脱水脲醛树脂胶生产的新方法

用Ａ（助剂）分子链上的羟基与ＵＦ（脲醛树脂）的醛基缩合交链合成不需脱水的Ａ－ＵＦ胶的新方法。在终点投完物料后，添加０．４％Ａ直接合成Ａ－ＵＦ胶可用于三层、多层板的生产，且每吨Ａ－ＵＦ胶多获利４００余元。     

黄原胶与槐豆胶协同相互作用及其凝胶化的研究

研究了黄原胶与槐豆胶在总浓度为１％,共混比例为６０／４０时,它们之间可以达到协同相互作用的最大值,并探讨了制备温度,盐离子浓度对共混凝胶化的影响,同时还发现协同相互作用的大小除了两者的共混比例和黄原胶的转变温度外,还与ＬＢＧ的Ｍ／Ｇ比值有关。     

生物质木材胶黏剂的研究进展

综述了几种重要生物质木材胶黏剂即单宁、木素、大豆蛋白、淀粉及木材原料基木材胶黏剂的研究进展情况,分析了生物质木材胶黏剂的应用现状,探讨了生物质木材胶黏剂的研究方向及发展趋势.     

分散松香施胶剂性能影响因素的探讨

对逆转法制备分散松香施胶剂过程中的主要因素如乳化剂的种类及用量、马来松香加合物含量、搅拌转速、加料速度和乳化温度等系统地进行了探讨，提出了合理的工艺条件，并对实际生产中可能出现的问题及解决办法进行了阐述。     

杜仲不同部位粗胶的提取方法

[目的]杜仲胶是优质天然橡胶,有望替代传统的三叶橡胶,而杜仲的树叶、树皮、果实等不同部位均可提取杜仲胶.探究杜仲不同部位杜仲胶的最佳提取方法,为杜仲橡胶的广泛应用奠定基础.[方法]以杜仲树叶、树皮、果壳为试材,分别采用机械法、碱浸法和综合法提取杜仲粗胶.[结果]以机械法提取,杜仲树叶粗胶的提取率为15.00%,其树皮粗...     

枫香采脂试验研究

采用V字形下降法对枫香树进行采脂试验研究,主要考察了采脂季节、枫香树胸径、树龄、采割高度、割沟频率等因素对产脂量的影响。结果表明,7、8、9三个月为产脂量较高月份;30cm以上胸径的树产脂量更高;树皮黑色、有裂纹、30年以上的枫香树产指率更高;第一对割沟高度在1．5m的树产脂量更高;15天割一次沟的产脂量更高等。采用V字形下降法进行枫香树采脂是可行的。     

Are gullies best for biodiversity? An empirical examination of Australian wet forest types

A relatively common observation in forest environments has been that gullies support higher species richness and individual abundance than elsewhere in the landscape. We completed a detailed case study of birds to contrast species richness and assemblage composition between gullies and other parts of the topography of landscapes in three closely related and spatially adjacent wet ash forest types – those dominated by Mountain Ash (Eucalyptus regnans), Alpine Ash (E. delegatensis) or Shining Gum (E. nitens) – in the Central Highlands of Victoria, south-eastern Australia. We also quantified the influence of a wide range of other measures of stand structure and plant species composition on the bird assemblage and on individual bird species.     

对我国松脂产业发展的几点建议

介绍国外松脂产生的发展趋势和国内松脂产生现状。提出进一步发展我国松脂产业的几点建议。     

Ethephon: a tool to boost gum arabic production from Acacia senegal and to enhance gummosis processes

Gum arabic production from Acacia senegal is lower in sub-humid areas than arid areas. Water stress is thought to be the reason for higher yields in arid areas. The application of ethephon is thought to mimic the effect of water stress in other plants. The objective of this study was to determine if the application of ethephon would increase the gum yields of Acacia senegal under sub-humid conditions in Cameroon. Trees receiving 40 or 120 mg ethephon were compared to controls in field experiments at a semi-arid and a sub-humid location in Northern Cameroon, over two seasons. Two provenances from drier areas (Sudan) were compared to the local one. In the first season, gum yield of the local provenance treated with ethephon was increased by 400–600 % compared to the untreated trees. Gum yield at the semi-arid location was 77, 313 and 214 g/tree with 0, 40 and 120 mg ethephon/tree, respectively, while at the sub-humid location, it was 30, 186 and 114 g/tree with 0, 40 and 120 mg ethephon/tree. However, in the second season, the effect of ethephon was not significant in the semi-arid area, whereas it was evident in the sub-humid area (up to 478 g/tree). Moreover, ethephon did not affect gum yield of provenances from drier areas (Sudan). This showed that the water-stress hypothesis has to be refined. The development of ethephon-based tapping systems is promising, but requires further studies with a wider range of environmental conditions and A. senegal provenances.     

中国松香工业概况

松香是一种具有重大经济价值的天然树脂.作为重要的化工原料,松香被广泛应用于造纸、胶粘剂、油漆涂料、油墨、橡胶、食品等工业.本文将通过阐述中国松香工业的历史、现状及发展前景,从宏观角度对中国松香工业作一个概述.     

伊春林区野生杀虫植物资源初报

植物性杀虫剂是开发新农药的一个重要方向，经不完全统计伊春林区可研究和开发的野生杀虫植物资源约有37科、71属、96种。其中毛莨科植物数量多达13种，菊科为9种，伞形科、百合科为6种。蓼科为5种，豆科、茄科、天南星科和蔷薇科为4种，藜科为3种，其余科植物种类较少。其中白屈菜、毒芹、兴安白芷、白头翁、藜芦等植物目前国内研究很多，具有很好的开发前号。并对伊春林区杀虫植物的研究方向和合理开发利用提出若干建议。     

Effect of tapping tools and date of tapping on <Emphasis Type="Italic">Acacia polyacantha</Emphasis> gum yield in South Kordofan State,Sudan

A study was conducted in South Kordofan, Sudan to determine the effect of tapping, tapping tools and date of tapping on the gum yield of Acacia polyacantha. A two-factor experiment was conducted for two seasons in 2008-2009. One location was used for two seasons and two locations for one season. The first factor (4 levels) was the tools of tapping: Makmak, Farrar, and Sonki, and the control which was not tapped. The second factor (2 levels) was the date of tapping that comprises mid October and mid November. These treatments were arranged in Randomaized Complete Block Design and replicated three times. Gum yield (g/tree and g/ picking) was recorded for five pickings. Economic analysis was done using the partial budget technique. The results showed highly significant (p < 0.01) differences on gum yield (g/picking and g/tree). The results indicated that the process of tapping increases gum production by 88.4% and 79.8% compared with un-tapped trees, respectively. The date of tapping has no significant effect on gum yield (g/tree and g/picking) of A. polyacantha. Tapping of the tree with Makmak in mid- November was found to be economically beneficial compared to using the other tools and the control. These results could identify a new source of income for the poor farmers in South Kordofan mainly because of the wild occurrence of Kakamut as a potential gum producing tree species grown naturally in the area.