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Ethylene enhances root water transport and aquaporin expression in trembling aspen (Populus tremuloides) exposed to root hypoxia
chromosome engineering aquaporin ethylene flooding oxygen hydraulic conductance
2023/12/7
In this study, we examined the effects of root hypoxia and exogenous ethylene treatments on leaf gas exchange, root hydraulic conductance, and the expression levels of several aquaporins of the plasma...
Climate Effects on Black Spruce and Trembling Aspen Productivity in Natural Origin Mixed Stands
dynamic models height growth functions mixed effects models biotic and edaphic effects climate change site productivity
2023/12/6
Forest managers need site productivity estimates for tree species growing in mixed stands. Models developed in the past are generally for pure stands and don’t factor in the effects of climate change ...
Productivity, Growth Patterns, and Cellulosic Pulp Properties of Hybrid Aspen Clones
Populustremula heterosis growthrate cellulosicpulp paperproperties
2024/3/8
This research provides a firm basis for understanding the improved aspen hybrid performance that aims at facilitating optimal clone selection for industrial application. Background and Objectives: Rap...
Evaluation of full tree skidding by HSM-904 skidder in patch cutting of aspen plantation in Northern Iran
time consumption HSM-904 skidder skidding cost
2015/4/14
This paper presents research results of the performance of HSM-904 grapple skidder using a full tree harvesting method in a non-native aspen Populus deltoides plantation in even terrain conditions in ...
Heavy metals uptake by the hybrid aspen and rowan-tree clones
phytoremediation heavy metals hybrid aspen
2015/3/5
Micropropagated plantlets derived from selected clones of the hybrid aspen (Populus tremula × Populus tremuloides) and the rowan-tree (Sorbus aucuparia L.) were used to determine the comparative study...
Aspen micropropagation: use for phytoremediation of soils
aspen micropropagation Agrobacterium tumefaciens
2015/3/3
Toxic pollution of soils is a major environmental problem in the Czech Republic. Most contemporary
remediation approaches do not provide acceptable solutions. For environmental clean-up, the use of ...
The sorption and desorption of phenanthrene and pyrene on treated and untreated aspen wood fibers were studied to evaluate the sorption mechanisms of polycyclic aromatic hydrocarbons (PAHs). Those sam...
整体煤气化联合循环发电系统可采取燃烧前捕集CO2的方法,处理的合成气量少,能耗低,且能够实现CO2的近零排放,在CO2脱除方面具有很大的优势。文中基于Aspen Plus对CO2/H2S联合脱除和分别脱除流程建立了模型,对2流程的能耗、CO2及H2S的脱除效率以及Selexol溶液的再生性能进行了分析。得出：在出口CO2纯度相同的情况下,CO2/H2S联合脱除流程的能耗仅占CO2/H2S分别脱除的...
基于ASPEN PLUS的固定床煤气化稳态模拟方法研究
ASPEN PLUS 固定床 煤气化 稳态模拟
2012/10/29
用ASPEN PLUS软件对固定床煤气化过程进行模拟，采用带FORTRAN气化动力学子程序的串联全混流反应器来代替Gibbs反应器，能够更好地反映气化炉的真实反应情况，结果表明该模型与实际固定床煤气化的反应结果吻合较好。利用该模型研究了串联釜数对碳转化率及出口温度的影响，研究表明：随着釜数的增加，碳转化率和出口温度更加接近于实际数据；在保证模拟精度的前提下，较少的釜数有利于减少计算量。
British Columbia抯 Northeastern Forests: Aspen Complex Stand Establishment Decision Aid
deciduous and mixedwood management fibre production Populus tremuloides silviculture systems trembling aspen vegetation management
2010/8/31
Aspen (Populus tremuloides) is the most widely distributed tree species in North America and can be found from the McKenzie Delta to northern Mexico. Its range in British Columbia is restricted to the...
通过流程模拟对煤基多联产系统进行过程优化是一种低成本、高效率的研究方法。通过稳态流程模拟软件Aspen Plus建立了二甲醚和电力为主要目标产品并副产甲醇的煤基多联产系统流程。采用气化煤气与焦炉煤气混合气作为气头，以达到利用焦炉煤气中高浓度甲烷、下一步工艺调整氢碳比并实现温室气体减排的目的。模拟流程中包括了空分、煤气化及净化、CH4/CO2重整、产品合成、燃气轮机联合循环发电等多联产系统中的5个主...
在所建立的以二甲醚和电力为主要目标产品并副产甲醇的多联产系统流程基础上，以化工产品产率优化及二氧化碳减排为目的，以甲醇当量产率、二甲醚产量和CH4/CO2转化率作为全流程优化的目标函数，对包括CH4/CO2催化重整单元和二甲醚（甲醇）合成单元在内的两个关键单元流程进行整体优化处理，同时分析了一步法二甲醚合成反应体系间的协同作用，得到了重整反应器和合成反应器的优化操作参数和最佳焦炉煤气与气化煤气进料...
基于ASPEN PLUS平台的生物质燃气脱焦工艺模拟
生物质燃气 脱焦油 ASPEN PLUS
2009/11/18
生物质燃气中焦油的脱除是生物质燃气推广和应用中的重要环节.介绍了生物质燃气的溶剂法脱焦工艺的基本过程，利用ASPEN PLUS化工模拟软件对该过程进行了模拟计算，分析了物料的流量和温度等工艺条件的改变对于脱焦效果的影响，得到了提高焦油脱出率的最佳方案措施，为实际操作提供了参考依据.
Aspen regeneration, forage production, and soil compaction on harvested and grazed boreal aspen stands
forest grazing Peace River region forest soil
2009/2/11
The objective of our study was to determine the effects of timber harvesting and cattle grazing on aspen regeneration, forage production, and soil compaction on aspen cutblocks in the Peace River regi...
Growing trembling aspen and white spruce intimate mixtures：Early results（13—17 years）and future projections
Growing trembling aspen white spruce intimate mixtures Early results future projections
2009/2/5
Controlled mixtures of trembling aspen (Populus tremuloides Michx.) and white spruce (Picea glauca [Moench] Voss) were established in 1989 at two locations in the Boreal White and Black Spruce (BWBS) ...