搜索结果: 1-10 共查到“知识库 heartwood”相关记录10条 . 查询时间(0.046 秒)
An efficient method to reduce grain angle influence on NIR spectra for predicting extractives content from heartwood stem cores of Toona. Sinensis
NIR spectra heartwood stem cores Toona. Sinensis grain angle
2023/6/5
A fast, reliable and non-destructive method is needed to qualify the extractives content (EC) in heartwood of T. sinensis cores in the breeding program for studying the genetic effect on EC. However, ...
The proportion of heartwood in conifer (Pinus sylvestris L., Picea abies [L.] H. Karst.) trunks and its influence on trunk wood moisture
pine spruce heartwood moisture content of wood
2015/4/24
As the tree age increases, the formation of heartwood takes place in the central part of the tree. Since there is a large difference in the moisture content between sapwood and heartwood in conifers, ...
Dynamics of heartwood formation and axial and radial distribution of sapwood and heartwood in stems of European larch (Larix decidua Mill.)
sapwood heartwood dynamics of heartwood formation social class of tree position European larch
2015/3/12
The study was an attempt to determine the dynamics of heartwood formation and the radial and axial distribution of sapwood and heartwood in stems of European larch (Larix deciduas Mill.) representing ...
Effects of pruning on heartwood formation in Scots pine trees
pruning heartwood pipe-model theory Pinus sylvestris L sapwood conductivity
2015/2/2
The object of this study was to investigate the effect of pruning on heartwood formation in mature Scots pine (Pinus sylvestris L.) trees. Fifty trees were treated by three different intensive pruning...
Relationship between Sugi Butt-Rot Disease and Norlignans in the Heartwood
sugi wood clone variety butt-rot disease norlignan sequirin-C
2009/11/23
A butt-rot disease of sugi (Cryptmeria japonica D. Don) wood has recently increased in reforested areas, but its damage level seems to depend on the clone variety. Aya sugi is susceptible to the butt-...
Pregnane steroids from the heartwood of Azadirachta indica
Azadirachta indica Meliaceae heartwood steroids 2a 3b 4b-trihydroxypregnan-16-one 2b 3b 4b -trihydroxypregnan-16-one 2a 3a 4b-trihydroxypregnan-16-one
2010/4/8
The heartwood of Azadirachta indica (Meliaceae) yielded a new steroid (2a, 3b, 4b-trihydroxypregnan-16-one) and 2 known steroids (2b, 3b, 4b-trihydroxypregnan-16-one and 2a, 3a, 4b-trihydroxypregnan-1...
Influence of Heartwood Extractives on Carbon Content Variations Among Clones in the Heartwood of Sugi（Cryptomeria japonica）
sugi broad-sense heritability extractives carbon content variation
2009/3/6
Heartwood extractives of Sugi (Cryptomeria japonica D. Don) had large variations among clones and high broad-sense heritability. Genetic improvement by selection of clones having large quantities of ...
An Application of the Lateral Impact Vibration Method to the Genetic Improvement of Heartwood Moisture Content in Cryptomeria japonica
Cryptomeria japonica heartwood moisture content lateral impact vibration clone
2009/3/6
The lateral impact vibration method is a non-destructive and high through-put method to estimate heartwood moisture content (MC) in living trees. We applied this method to an investigation of 37 clone...
The Bioactive Extracts of Heartwood of Dalbergia latifolia
Dalbergia latifolia heartwood neoflavonoid antitermite activity
2009/3/4
The heartwood of Dalbergia latifolia was extracted succesively with n-hexane, EtOAc and MeOH solvent. The extracts were then examined for the bioactivity against termites and various fungi, including ...
An Investigation on Internal Morphological Proporties of Sapwood and Heartwood of Oriental Spruce [Picea orientalis（L）Link.]
Internal Morphological Proporties Sapwood Heartwood Oriental Spruce
2009/1/23
In this study, sapwood and heartwood samples obtained from Oriental spruce growing naturally only in East Black Sea region were investigated. Trees of 36-44 cm diameter were obtained from the Karahav...