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苦楝皮、果、叶提取物苦楝素含量分析
苦楝 苦楝素 提取
2012/8/9
分析比较了乙醇浸提法所得苦楝皮、果、叶提取物的含量,结果表明,乙醇浸提方法的最佳条件为:液固比20:1(mL:g),提取时间 5h,提取次数2次。测定了福建6个种源和全国17个种源苦楝皮、叶、果中苦楝素的含量,并对优质种源进行了筛选,得到苦楝素含量高于平均值1.3倍的优良单株,为苦楝的良种选择及定向培育提供了依据。
HPLC测定油橄榄不同部位山楂酸的含量
高效液相色谱法 油橄榄 山楂酸
2012/8/6
采用高效液相色谱(HPLC)法对我国陇南地区引种的油橄榄不同部位中山楂酸的含量分布进行了系统研究,建立了油橄榄不同部位中山楂酸含量的测定方法。用KromasilC18柱(250mm×4.6mm,5μm),以甲醇-1.0%醋酸水溶液(体积比88:12)为流动相,检测波长为215nm。结果显示,油橄榄全果中含山楂酸0.16%,果肉中含0.17%,橄榄叶中含0.73%,油橄榄枝条表皮中含0.31%,油橄...
毛花柱忍冬花蕾化学成分研究
毛花柱忍冬 化学成分 花蕾
2012/8/6
对毛花柱忍冬花蕾进行化学成分研究,从中分离鉴定了10个化合物:绿原酸(Ⅰ)、5-O-咖啡酰基-奎宁酸丁酯(Ⅱ)、5-O-咖啡酰基-奎宁酸甲酯(Ⅲ)、槲皮素(Ⅳ)、木犀草苷(Ⅴ)、芦丁(Ⅵ)、山奈酚-3-O-芸香糖苷(Ⅶ)、秦皮乙素(Ⅷ)、β-谷甾醇(Ⅸ)和胡萝卜苷(Ⅹ)。其中化合物Ⅶ为首次从该属植物中分离,化合物Ⅰ、Ⅱ、Ⅲ、Ⅴ、Ⅵ、Ⅷ、Ⅸ、Ⅹ均为首次从该植物中分离。
An assessment of critical assumptions supporting the timber supply modelling for mountain-pine-beetle-induced allowable annual cut uplift in thePrince George Timber Supply Area
allowable annual cut immature pine mortality mountain pine beetle timber shelf life
2009/2/11
To address the mountain pine beetle epidemic, the allowable annual cut (AAC) for the Prince George Timber Supply Area (TSA) has been increased by 5.7 million m3 to 14.944 million m3. Timber supply mod...
Mathematical models for optimization of group work in harvesting operation
mathematical model team work time study productivity costs
2009/2/7
This paper research of productivity and work organization were investigated of a group made of five workers (two cutters, two tractor drivers and one cutter-inspector) and a team leader. The team wa...
Research of fir-wood dust concentration in the working environment of cutters
firwood wood dust mass concentration cutter working environment
2009/2/7
This paper shows the results of measurement of daily exposure of cutters to respirable particles and total fir-wood dust during cutting and processing of dead standing fir-trees. The separators of non...
Extraction of spruce timber by Gantner cable crane from selective forests of Artvin region
Gantner cable crane carriage productivity Turkey Artvin
2009/2/7
The purpose of this study is to investigate the productivity of the Gantner cable crane during extraction of Spruce timber from mixed stand of Oriental spruce, Scots pine and Oriental beech in North...
Productivity of C Holder 870 F tractor with double drum winch Igland 4002 in thinning beech stands
thinning beech stands C Holder 870 F skidding productivity costs
2009/2/7
Research of productivity of C Holder 870 F tractor in thinning beech stands was performed in the area of Forest Administration Bjelovar, Forest Office Velika Pisanica in the compartment 87a of the m...
Economic Comparison of the Use of Tyres, Wheel Chains and Bogie Tracks for Timber Extraction
tyre wheel bogie track wheelchain fuel consumption forwarder
2009/2/7
Many logging operators in Finland use bogie tracks and wheel chains all the year round and under all terrain conditions. The hypothesis tested here is that bogie tracks and wheel chains increase the...
Influence of working conditions on overlapping of cutting and ground skidding in group work
group work cutting skidding working conditions multivariate analysis
2009/2/7
This research deals with the influence of working conditions on the duration of cutters participation in group work skidding. Two main theoretical assumptions were considered. First, working condition...
Harvest block spatial configuration as a function of logging road density：Do larger more aggregated blocks create less road?
Harvest block spatial configuration logging road density
2009/2/5
Logging roads are a large component of forest management and have been directly linked to a variety of negative ecological effects, including forest fragmentation. Much research exists that views logg...
Forecasting of the Long-Term Allowable Cut for the Akçasu Forestry Enterprise
Long-Term Allowable Cut Akç asu Forestry Enterprise
2009/1/23
The long-term allowable cut was ensured using data of Forest Menegement Plan of the Akçasu Forest enterprise. In addition, actuel forest state was approximated to an optimal forest state within...
An Investigation on The Loading and Unloading Operations in Artvin Forest District
Operations Artvin Forest District
2009/1/23
Artvin Forest District which is the best example for mountainously areas in Turkey, was selected as a suitable study area for this investigation. Data which were collected by using the repetition time...
An Investigation on the Transportation by Trucks At Mountainously Regions
Transportation Trucks Mountainously Regions
2009/1/23
Artvin Forest District, which is the best example for mountainous forest areas in Turkey, was selected a suitable study area for this investigation. Data which were collected by using the repetition t...
Minimization to be Using of Transport Model of Transportation Costs by Trucks at Artvin Forest District
Transport Model Transportation Costs Trucks Artvin Forest District
2009/1/23
The transportation after harvesting in forestry operation follow one another. Sixty six percent of forest road network planned in Artvin Forest District is finished. Now, the average forest road densi...