微纤丝

利用近红外光谱和X射线衍射技术分析木材微纤丝角

The Analysis of Wood Microfibril Angle by Near Infrared Spectroscopy and X-Ray Diffractometry

BP神经网络与近红外光谱定量预测杉木中的综纤维素、木质素、微纤丝角

Quantitative Prediction of Holocellulose , Lignin , and Microfibril Angle of Chinese Fir by BP-ANN and NIR Spectrometry

然后，依据木材不同成分在近红外区的不同吸收特性，在近红外光谱数据与X射线衍射仪测定的微纤丝角之间建立相关模型。

Then , the PLS model was built between NIR data and MFA by the X-ray measured .

应用X射线衍射法对7个杨树无性系微纤丝角进行了测定。

The microfibril angle ( MFA ) of 7 poplar clones was measured by using the X-ray diffraction estimation .

该实验首先利用X射线衍射仪，快速测量和计算出154个杉木木材样品的微纤丝角。

In the experiment , the ( average ) MFA of each sample were rapidly measured by X-ray scanning diffractometry .

本文阐述应用X射线（002）面衍射弧测定棉纤维次生胞壁平均螺旋角（又称微纤丝角）的方法。

A method to determine the mean spiral angle ( commonly called microfibril angle ) of cotton fibre secondary walls from the spread of the ( 002 ) crystal plane arcs in X-ray diffraction diagram is proposed .

结合SSR分子标记结果，采用单因素方差分析法进行标记与性状的相关分析，共找到与木材密度、纤维长、纤维宽以及微纤丝角相关联的标记分别为5、7、4、2个；

Using the method of single factor variance , the SSR markers correlated with wood density , fibre length , fibre width and fibre angle were identified to be 5,7,4 and 2 , respectively .

泰兴杂交种F1代2年生子代苗的木材密度、纤维宽度和纤维长宽比均无显著差异，而木材含水率、纤维长度和微纤丝角存在显著或极显著差异。

Wood density , fiber width , fiber length to width of Taixing two-year hybrid seedlings had no significant variances , while fiber length , microfibril angel and water content of wood showed significant variances . 6 .

显微观察表明，粗酶液可破坏愈伤组织细胞，酶液处理24h后细胞壁扭曲变形、壁部分消解或出现微纤丝；

The microscope abservation showed that the crude enzymes could destroy the callus cells of rice . Treated by the crude enzymes 24 hours , a part of cell wall was distorted , cleared up or appeared microfibrillate ;

本文研究内容包括以下四个方面：1.利用近红外光谱（NIR）技术结合反向传递神经网络法（BPNN）定量预测了杉木中的综纤维素、木质素、密度和微纤丝角。

The results as follows : 1 . The amount of holocellulose , lignin , density , and microfibril angle of Chinese fir were predicted by using back-propagation neural network ( BP-ANN ) combined with near infrared ( NIR ) spectrometry .

杉木密度、微纤丝角预测模型的相关系数R值分别为0.81、0.87，预测均方根误差RMSEP分别为：0.03、0.04。

The correlation coefficients ( R ) for prediction models of density , microfibril angle of Chinese fir were 0.81 , 0.87 , respectively . The root mean square errors of prediction ( RMSEP ) for the established models were 0.03 , 0.04 , respectively .

近年来，由于结构测定技术的迅速发展，初步建立了从米（100m）到纳米层次（10-9m）的表征手段，建立了相关微纤丝合成的模块。

In recent years , due to the rapid development of the structure determination , we preliminarily establish characterization means from meters ( 100m ) to the nanometer level ( 10-9m ), and build microfibril synthesis module .

木材微纤丝角研究的现状和发展趋势

Current Situations and Prospects on the Microfibril Angle Research of Wood

木材微纤丝角四种测试方法对比研究

Comparison of Four Kinds of Measurement Techniques for Wood Microfibril Angle

早材管胞微纤丝角明显大于晚材。

The microfibril angle of earlywood tracheid bigger than that of latewood .

毛竹材质生成过程中微纤丝角的变化

Variations of the microfibril angle in developmental moso bamboo culms

植物激素对微管和纤维素微纤丝排向的调节

Regulation of plant hormone on the layout of microtubule and cellulose microfibril

木材微纤丝角和密度与弹性模量的关系

Relationship of wood MFA and density with elastic modulus

杉木木材微纤丝角变异规律的研究

Variation Patterns of Microfibril Angle for Chinese Fir Wood

兴安落叶松管胞形态特征和微纤丝角及其径向变异的研究

Tracheid morphology characteristics and microfibrillar angle and their variation patterns of Larix gmelinii

毛白杨无性系纤维特性及微纤丝角的遗传分析

Genetic Analysis of Fiber Traits and Microfibrillar Angles on Clones of Populus tomentosa

对55个杉木无性系管胞微纤丝角的遗传变异进行了研究。

Genetic variations on tracheid microfibril angle of 55 Chinese fir clones were investigated .

木材微纤丝角的测定方法及其进展

Measurement Methods and Development of Wood Microfibril Angle

通常是球状的（球菌样的）或长微纤丝的单个细胞。

They are spherical ( coccoid ) or form long microscopic filaments of individual cells .

银杏木材微纤丝角及其与生长轮密度相关模型的建立

Study on Wood Microfibril Angle and the Correlation Models with Growth Ring Density of Ginkgo

棉纤维细胞壁的微纤丝螺旋角及其与花后生长天数的关系

Microfibrillar helical angle of cell walls of cotton fiber and its relation to days post-anthesis

杨树无性系微纤丝角的变异及其与材性的关系

The Variation Pattern of Microfibril Angle , and Its Relationships with Wood Properties for Poplar Clones

结果表明：①微纤丝角、管胞壁厚与种植密度呈负相关；

It showed that the microfibril angle and tracheid wall thickness have negative correlation with planting density .

白桦天然种群木材纤维性状、微纤丝角和基本密度的变异

Variation of Wood Fiber Characteristics , Microfibril Angle and Basic Density of Betula platyphylla in Natural Populations

在亚细胞结构上则表现为细胞壁微纤丝减少，细胞核膜、原生质膜损伤甚至解体，细胞区隔化作用减弱，进而导致代谢紊乱。

Cellular ultrastructure observation showed that microfibril was decreased , and the nuclear envelop and plasmalemma disintegrated .