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高比表面积竹质活性炭的制备与性能研究
活性炭 竹子 磷酸活化 高比表面积
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2012/8/4
以竹子为原料、磷酸为活化剂,在不同条件下制备竹基活性炭,考察浸渍比、活化温度、活化时间、升温速率等因素对竹质活性炭产品吸附性能的影响,得到亚甲基蓝吸附值最高达200mL/g、焦糖脱色率最高达120%的高吸附性能竹质活性炭。研究结果表明最佳工艺条件为:浸渍比3:1(g:g),活化温度400℃,升温速率10℃/min,活化时间40min。对所制得的竹质活性炭产品进行扫描电镜(SEM)分析、N2吸附分析...
在中性条件下对混合办公废纸(MOW)进行脱墨,研究了脱墨效果和脱墨剂起泡性之间的关系。结果表明,在单一组分脱墨剂中,阴离子表面活性剂起泡性越强脱墨效果越差,起泡性最好的AEC-7-Na脱墨浆白度仅为80.51%(ISO),泡沫越稳定脱墨效果越好,泡沫稳定性最强的ABS脱墨浆白度达到83.04%(ISO)。非离子表面活性剂的脱墨效果与起泡性强弱无明显关系,泡沫的稳定性对脱墨效果没有影响。在非/阴离子...
生物柴油用于合成蔗糖酯的工艺研究
生物柴油 蔗糖 蔗糖酯 合成工艺
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2012/8/4
以自制的生物柴油、蔗糖为原料,采用无溶剂法合成蔗糖酯,确定了合成工艺的各项工艺条件:占总物料量2%的K2CO3为催化剂,10%的硬脂酸钾为助溶剂,生物柴油和蔗糖的物质的量之比为1:1～4:1,在130℃下反应3h,控制真空度低于0.09MPa,采用混合溶剂萃取法纯化粗产物,得到产品质量较高的蔗糖酯,产率可达78%。
The research of virtual production in wood industry
wood industry co-operation virtual enterprise changeable network information
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2009/11/27
Enterprises with inflexible production structures can no longer survive in a turbulent market, as they cannot react to changes that would lead to their development. In order to satisfy specific custom...
Anatomy of wood for bows of string instruments
string instrument bow pernambouc massaranduba snakewood
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2009/11/27
Four specimens of wood originating from string instrument bows or from the material intended to be used for the repair of bows were obtained from the string instrument workshop »Atelje Demš...
以1.0% H2SO4在150℃预处理杨木屑20min可水解溶出66.5%木聚糖和7.1%葡聚糖,生成以木糖为主、含有乙酸和甲酸等发酵抑制物的预处理液,脱毒后可采用Candida shehatae R发酵产乙醇,而Pichia stipitis NL23不能生长。减压蒸发加石灰中和法对预处理液的脱毒效果最佳,可脱除70.0%乙酸和40.0%甲酸,糖损失仅为5.0%～6.0%, C.shehatae...
Current perception of wooden building in Slovenia
public opinion wooden building residential building Slovenia
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2009/11/27
In residential buildings, prefabricated wooden houses constitute minor part of all buildings in Slovenia. The reasons pertaining to the relatively low occurrence of prefabricated wooden buildings toda...
ANALYSIS OF THE IMPORTANCE OF INFORMATION FOR THE PLANNING AND RUNNING THE PRODUCTION IN WOOD INDUSTRY COMPANIES
planning production running production information wood industry company
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2009/11/26
In wood industry, three types of production are known: piecework, serial and mass production. The presented research attempted to determine which information was crucial for successful planning and ru...
Influence of beech particle size used in surface layer on bending strength of three-layer particle board
particleboard bending strength beech particles particle size surface layer compaction ratio
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2009/11/26
It is well known that wood species and particle size used influence the bending strength of the three-layer particleboard. The purpose of this research was to determine how the size of beech (Fagus sy...
SETUP TIME REDUCTION ON FOUR-SIDE PLANING MACHINE WITH THE SMED METHOD
wood industry company four-side planing machine setup times SMED method
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2009/11/26
Due to the rapidly increasing diversity of products and smaller batch sizes, the setup time reduction is of crucial importance for the profitability of a company. The article deals with the problem of...
MODEL FOR CLASSIFICATION OF WOODEN FURNITURE PRODUCTS IN VIEW OF ENVIRONMENT THREATENING DURING THE PRODUCTION PROCESS
wood industry environmental burdening classification of products modelling
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2009/11/26
There are many parameters influencing environmental burdening in the process of wooden furniture production. The aim of this research was to ascertain the key parameters and to form a model for classi...
阐述了中国传统美学思想的主要内涵、极简主义风格家具的特点和设计要素，以及如何利用符号学和语义学的设计方法来把握极简风格家具中的中国传统美学。以求更好的提炼中国传统美学的审美要素为现代的极简风格家具所利用，从而设计出极具民族传统特点的极简风格的现代家具。
黄檗中小檗碱的超临界二氧化碳萃取工艺研究
黄檗 小檗碱 超临界二氧化碳萃取
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2012/8/4
利用超临界CO2萃取的方法,研究了黄檗树皮中小檗碱的萃取工艺。探讨了各种影响因素对黄檗中小檗碱萃取率的影响,通过正交试验设计验证并确定了超临界CO2萃取的最佳工艺:萃取压力25MPa,萃取温度50℃,萃取时间60min,夹带剂乙醇体积分数95%。在此条件下,小檗碱提取率为67.56%(得率0.5837%)。
HPLC法测定吉林地区三种乌头双酯型生物碱含量
高效液相色谱法 乌头碱 新乌头碱 次乌头碱
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2012/8/4
采用高效液相色谱法测定吉林地区3种乌头中乌头碱、新乌头碱和次乌头碱的含量。结果表明,新乌头碱在0.0016～2.0030g/L范围内线性关系良好,r为0.9996;平均加标回收率为98.6%,相对标准偏差(RSD)1.7%;乌头碱在0.0016～1.0005g/L范围内线性关系良好,r为0.9998;平均加标回收率为97.5%,RSD2.8%;次乌头碱在0.0016～1.0000g/L范围内线性关...