硅溶胶预处理对炭化橡胶木防白蚁及阻燃性能的影响     

李民  李晓文  蒋汇川  陆全济  李冠君  李家宁 《热带作物学报》2016,37(7):1382-1386

通过硅溶胶浸注预处理获得橡胶木浸注材,再将橡胶木和浸注材分别于185℃和200℃下热改性处理,研究了硅溶胶预处理对炭化橡胶木防白蚁及阻燃性能的影响。结果表明:蚁蛀等级分别从4提升至3.8和4提升至3.75;埋地1 a后完好指数分别从1.3提升至5.9和2.5提升至5.4;氧指数分别提高16.40%和20.16%;EMC无显著变化;气干密度分别提高18.58%和22.03%;弦向气干湿胀率分别降低了10.27%和9.17%,径向气干湿胀率分别降低了15.00%和17.57%;弦向ASE分别提高了21.75%和11.56%,径向ASE分别提高了20.00%和19.71%。  相似文献   

山东寿光地区蔬菜重金属赋存现状研究   总被引：5，自引：0，他引：5  

徐晓慧  高宗军  庞绪贵  王敏  代杰瑞 《安徽农业科学》2010,38(28):15830-15831

[目的]研究寿光地区蔬菜重金属的含量,为寿光地区提供蔬菜重金属残留防止措施。[方法]从大型蔬菜生产基地中采取样品,对12种蔬菜样品重金属元素Cr、As（非金属As的赋存特性与重金属类似,故在此统称为重金属）、Pb、Cd、Hg的含量进行分析。[结果]5种重金属在各类蔬菜中的平均含量依次为：Pb〉Cr〉As〉Cd〉Hg。化学肥料的大量施用、工矿企业的＂三废＂排放、汽车尾气等,使得寿光地区部分蔬菜重金属Pb含量超标;不同的蔬菜种类对于不同的重金属元素的富集程度是不同的,主要是由其对于特定重金属元素的＂喜好＂所决定。[结论]为防止农业环境污染,寿光地区应大力提倡使用有机肥料,并合理考虑蔬菜生产基地的规划与布局。  相似文献   

Improvement of biogas production from oil palm empty fruit bunches (OPEFB)     

Danay Carrillo Nieves  Keikhosro Karimi  Ilona Sárvári Horváth 《Industrial Crops and Products》2011,34(1):1097-1101

Oil palm empty fruit bunches (OPEFB), a waste lignocellulosic material, which is the main byproduct of vegetable oil production industries in Indonesia and Malaysia, was utilized as a source for biogas production. Pretreatments using NaOH as well as phosphoric acid were investigated to improve the biogas production. Clear positive effects of the pretreatments on the yield of methane were observed. The best improvement was achieved when 8% NaOH for 60 min was used for the pretreatment, which resulted in 100% improvement in the yield of methane production. In addition, treatment with phosphoric acid resulted in 40% improvement in the methane yield compared with that of the untreated material. The results showed that the carbohydrate content of OPEFB could be efficiently converted to methane under the anaerobic digestion process. 97% of the theoretical value of methane production was achieved after the pretreatment with NaOH for 60 min. Moreover, the initial rate of methane production was also increased by more than 85% after the treatment with NaOH compared with that of the untreated OPEFB.  相似文献   

预处理对萝卜离体花药生理生化特性的影响     

张丽  白小娟 《西北农业学报》2011,20(7):60-63

以3种不同类型萝卜基因型的花药为试材,研究低温条件下甘露醇与秋水仙素预处理对萝卜离体花药中可溶性蛋白、可溶性糖及游离脯氨酸含量的影响。结果发现,与对照相比,可溶性蛋白含量在经过预处理后表现不同程度的下降,随处理时间的延长表现小幅度的回升;可溶性糖含量随处理时间的延长而增加;游离脯氨酸含量在经过预处理后显著高于对照,但在两种处理方式中变化趋势表现不同,甘露醇预处理表现先增加后减少,而秋水仙素处理表现先减少后增加。  相似文献   

Steam explosion pretreatment reproduction and alkaline delignification reactions performed on a pilot scale with sugarcane bagasse for bioethanol production     

G.J.M. Rocha  A.R. GonçalvesB.R. Oliveira  E.G. OlivaresC.E.V. Rossell 《Industrial Crops and Products》2012,35(1):274-279

This work was focused on the steam explosion pretreatment reproduction and alkaline delignification reactions on a pilot scale for the ethanol production, through different varieties of natural sugarcane bagasse, pretreated bagasse and delignified pretreated bagasse (cellulosic pulp). The possible chemical composition differences of the various types of bagasse, as well as the chemical composition variations of the materials in the 20 processes of pretreatment and delignification on the pilot scale were verified. The analytical results of the 20 samples of most diverse varieties and origins of natural sugarcane bagasse considering planting soils, planting periods and weather; show no significant chemical differences. It is evident that only with the chemical composition it is not possible to verify the differences between the varieties of sugarcane bagasses. The research results may offer some evidences of these varieties, but it is not a reliable parameter. The pilot process of steam explosion pretreatment and the alkaline delignification process of pretreated material showed through analytical results a good capacity of reproduction, as the standard differences were below 2.7. The average allowed in the pretreatment and alkaline delignification processes were 66.1 ± 0.8 and 51.5 ± 2.6 respectively, ensuring an excellent reproduction capacity of the processes obtained through chemical characterizations.  相似文献   

预处理方式对水稻秸秆厌氧发酵产气特性的影响   总被引：4，自引：0，他引：4  

罗立娜  李文哲  徐名汉  李承毅  窦钰程 《农业机械学报》2012,43(11):152-156

在中温(35℃)条件下,分析了不同预处理方式对水稻秸秆厌氧发酵过程中产气特性的影响,比较了厌氧发酵前、后水稻秸秆组分变化的情况,结果表明:氨化预处理的秸秆产气量最大,VS(挥发性固体)产气量达到356.80 mL/g,比对照组高11.70％;各组甲烷质量分数的最大值均达到了70％以上,甲烷含量差异不显著;水稻秸秆厌氧发酵后的木质纤维素含量均呈现下降的趋势,木质纤维素的降解率与产气量成正比,氨化后的水稻秸秆与原水稻秸秆相比,纤维素、半纤维素和木质素的降解率分别为28.49％、51.73％和7.13％.  相似文献   

农业废弃物发酵生产乙醇研究进展     

樊超  邱忠平  华建军 《安徽农业科学》2011,39(32):19961-19964

介绍了农业废弃物生产乙醇相关技术,并对国内外利用农业废弃物生产乙醇研究进展进行了综述,提出了需进一步研究和解决的问题。  相似文献   

裹衣油炸蚕豆加工工艺研究   总被引：1，自引：0，他引：1  

杨希娟  刘玉皎  耿贵工 《安徽农业科学》2011,39(4):2312-2313,2316

[目的]研究裹衣油炸蚕豆加工工艺。[方法]以青海12号蚕豆为原料,分析不同预处理方式、油炸温度、油炸时间及裹衣原料对裹衣油炸蚕豆品质的影响。[结果]经过发芽预处理,油炸温度为180℃、油炸时间为5 min,选用糯米粉为裹衣原料加工的裹衣油炸蚕豆,品质好、口感佳。[结论]该研究优化了裹衣油炸蚕豆加工工艺。  相似文献   

基于高光谱遥感数据提取土地利用信息     

李守乾  安裕伦  朱珂  张跃红 《安徽农业科学》2011,39(4):2409-2412

高光谱数据像谱合一及特有的高光谱分表率特性在研究地表物质成分、含量及其动态变化方面极具潜力。土地利用信息对于国土资源调查、规划及动态监测具有重大意义。以贵州省西南部关岭县和贞丰县交接处的北盘江花江段为研究区域,用SAM方法对土地利用信息进行提取,并将结果与实地调查资料对比计算总体精度和KAPPA系数。达到预期结果,将分类结果制作成花江土地利用分布图。  相似文献   

食品中脱氢乙酸分析方法的最新研究进展   总被引：2，自引：0，他引：2  

曾金  王天地 《安徽农业科学》2016,44(15)

随着社会对食品安全的关注,加强食品添加剂的监管力度是食品安全监管任务的重要内容之一。综述了近年来食品中脱氢乙酸(常用防腐剂)分析方法的最新研究进展,包括多种前处理方法和检测方法,为食品添加剂的检测分析提供参考,同时提出了未来食品中脱氢乙酸(常用防腐剂)分析方法的研究方向。  相似文献