搜索结果: 1-15 共查到“stems”相关记录44条 . 查询时间(0.078 秒)
Allometric Equations for Volume, Biomass, and Carbon in Commercial Stems Harvested in a Managed Forest in the Southwestern Amazon: A Case Study
managed forests carbon sequestration state Acre Brazil tropical forest rainforest timber
2024/1/19
Forests in the southwestern Amazon are rich, diverse, and dense. The region is of high ecological importance, is crucial for conservation and management of natural resources, and contains substantial ...
High carbon dioxide can create 'shrinking stems' in marshes（图）
High carbon dioxide shrinking stems marshes
2019/10/18
For most plants, carbon dioxide acts like a steroid: the more they take in, the bigger they get. But in a new study, scientists at the Smithsonian Environmental Research Center, Villanova University a...
Evaluation of Auditory Brain Stems Evoked Response in Newborns With Pathologic Hyperbilirubinemia in Mashhad, Iran
Newborn Bilirubin Hyperbilirubinemia Auditory Brain Stem Evoked Response
2015/10/20
Background: Neonatal jaundice is a common cause of sensorneural hearing loss in children.
Investigating the out-of-roundness and pith-off-centre in stems of three broadleaved species in Hyrcanian forests
stem diameter felled trees Alnus subcordata Acer velutinum Quercus castaneifolia
2015/4/14
The out-of-roundness and pith-off-centre of Alnus subcordata, Acer velutinum and Quercus castaneifolia growing in Hyrcanian forests of Iran were investigated. Stem disks were cut from the breast heigh...
Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites
conducting area European larch mean ring conducting area relative conducting area social class of tree position
2015/3/20
The paper presents an attempt to determine conducting area (CA), relative conducting area (CA.k–1) and mean ring conducting area (CAar) on discs cut at breast height from stems of larch trees growing ...
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 ...
Fungi in Living and Dead Stems and Stumps of Pinus mugo on Coastal Dunes of the Baltic Sea
forest fire fungal diversity mountain pine mycobiota root rot succession
2015/3/11
Communities of xylotrophic fungi were studied in wood of Pinus mugo of different qualities: (i) living stems, (ii) cut
stumps, (iii) burned snags, (iv) cut burned stumps, (v) stems recently killed b...
Can artificial wounding of beech stems induce necroses?
Fagus sylvatica L. mechanical wounds of stems induction of necroses Central Slovakia
2015/2/6
The paper presents data on the induction of necroses after small injuries to beech stems caused by electrodes during measuring cambium electric resistance. Altogether 121 beech stems of tree class 1–3...
This paper investigates the Proto-Bantu origins of the principal tonal classes in Kinande nonderived mono- and disyllabic nominal stems. The ternary H vs. L vs. 0 distinction in the final syllable of ...
Paradigmatic Uniformity and Contrast: Korean Liquid Verb Stems
Paradigmatic Uniformity Contrast Korean Liquid Verb Stems
2014/11/12
The recent literature on paradigms has uncovered two forces that pull a morpheme in different directions, often contravening a language's normal phonological processes and constraints. Paradigm Unifor...
Model Based Automatic Segmentation Of Tree Stems From Single Scan Data
Forestry point cloud RANSAC segmentation terrestrial laser scanning tree detection
2014/4/22
Forest inventories collect feature data manually on terrestrial field plots. Measuring large amounts of breast height diameters and tree positions is time consuming. Terrestrial laser scanning could b...
Substantial nutrient resorption from leaves, stems and roots in a subarctic flora: what is the link with other resource economics traits?
leaching resistance nitrogen nutrient resorption organ senescence
2011/9/23
Nutrient resorption and leaching resistance, through their roles in reducing nutrient losses, are important determinants of plant nutrient economy. However, the contributions of fine-stem and fine-roo...
Variation of Wood Properties with Height Position in the Stems of Obi-Sugi Cultivars
Obi-sugi cultivars wood property variation microfibril angle basic density height increment
2009/11/23
To promote the use of sugi woods, the information on the variation of wood properties is very important. Obi-sugi is a major group of sugi cultivars planted in Southern Kyushu. However there is no inf...
收割期牧草底部茎秆生物力学性能试验（Experiment on Biomechanical Properties of Bottom Stems of Forage in Harvesting Period）
牧草茎秆 抗拉强度 化学成分 显微结构
2010/5/5
以北方典型多年生豆科牧草紫花苜蓿、小冠花和禾本科扁穗冰草、无芒雀麦收获期底部茎秆为研究对象，在500N微机控制电子万能试验机上试验研究了主要力学性能，并测定了茎秆在不同状态下纤维素、木质素、蛋白质等主要化学成分含量，观测了茎秆的微观组织结构,得到了茎秆扫描电镜下的解剖构造图像。研究结果表明：4种牧草收割期底部茎秆应力σ与应变ε曲线服从虎克定律，禾本科扁穗冰草茎秆抗拉强度高而弹性小；豆科小冠花茎秆抗...
Moisture Distribution in Stems of Acacia mangium,A.auriculiformis and Hybrid Acacia Trees
wood properties plantation forest heartwood sapwood wood drying
2009/9/10
Distribution of the moisture content across stem wood at breast height in Acacia mangium, A. auriculiformis,and hybrid Acacia trees grown in 3 Asian countries was evaluated. Moisture contents of the s...