髓心

径向位置的不同对杉木和I-72杨人工林木材的径、弦向干缩均有极显著影响：从树皮到髓心，木材径、弦向干缩逐渐减小，与其基本密度的变化趋势一致。

For both species the shrinkage in radial and tangential direction was decreased gradually from bark to pith , with the similar trend as basic density .

年轮密度从髓心向外一直呈逐渐下降趋势；

The ring density decreases gradually from the pith outward .

先由髓心向外迅速增加，到第5a达到最大值后再向外逐渐减小；

The rapid increase outside the direction by the marrow heart first reduces to outer to 5a achieves the crest more gradually ;

日本柳杉髓心方材高频真空干燥试验

Radio frequency / vacuum drying tests on japanese sugi Select of Heart

传统的治疗方法是以环钻法为主的髓心减压技术。

Traditional scheme is core decompression technique using trephine .

另外，髓心对干燥缺陷的产生影响较大。

Piths have great effect on drying defects .

管胞直径、胞壁厚度自髓心向外增加。

The tracheid diameter and the thickness of cell wall increase from pith to bark .

股骨头髓心减压加异体腓骨移植术治疗股骨头坏死

Surgical treatment of necrosis of the femoral head in early stages with core depression and allo-fibular grafting

长枝髓心不发达。

Long sticks pith underdevelopment .

髓心减压及异体螺纹骨笼植入治疗股骨头坏死临床观察

Clinical Outcome of Core Decompression in Combination with Allograft Threaded Cage Insertion for the Treatment of Osteonecrosis of the Femoral Head

麝香注射液联合髓心钻孔减压加植骨术治疗股骨头缺血性坏死的临床观察

The Clinical Research on Musk Injection and Myeloid Drilling Core Decompression and Bone Graft for Treating Avascular Necrosis of the Femoral Head

纤维素含量由髓心处47.57%增加到树皮附近51.74%；

Cellulose content of wood in the radial direction increases from pith ( 47.57 % ) to bark ( 51.74 % ) .

目的探讨股骨头髓心减压带旋髂深血管蒂髂骨骨瓣植骨术治疗股骨头缺血坏死的疗效及手术适应证。

Objective To evaluate the indications for vascularized iliac bone grafting in the treatment of osteonecrosis of the femoral head and operative results .

结果表明，淹水和未淹水两种情况下的69杨生材含水率的径向变异都为自髓心向外开始以直线或曲线下降，到5～6年生长轮处达最小值，以后又略有增大；

The radial variation of the two trees firstly decreased from pith outward , get minimum at 5 ~ 6 years , and then increased again .

结果表明：采取髓心形成层贴接法嫁接平均成活率为62%，劈接法为88%。

Grafting was applied in the same season . The experiment showed that survival by pith-cambium grafting is 62 % , while 88 % by bud grafting .

管胞次生壁S2层的纤丝角径向变化由髓心向外，开始递减很快，13年后纤丝角度大小相对稳定。

Microfibrillar angle within the S_2 layer of the secondary wall in tracheid decreases rapidly from pith outwards , and then levels off after 13 years old .

经方差分析，两种方法嫁接成活率及成活后接穗平均生长量差异均极显著，说明红松采取劈接法嫁接优于髓心形成层贴接法。

Analysis of variance showed extremely significant on survival and coins growth between two grafting methods , which reveals that bud grafting excelled pith-cambium grafting on Korean pine graft .

结果表明，各年轮基本密度及相应的自髓心的断面基本密度的径向变异表现为，在各断面高度随距髓心年轮数的增加而增大，到一定年轮数后增加趋缓；

The results showed there existed radial variation and vertical variation of the ring wood basic density and the cross section wood basic density of certain number of rings from pith .

髓心附近（2～4年），纤维素、木质素、戊聚糖含量分别为39.56%、31.58%、14.77%；

Average wood composition near the pith ( 2 to 4 years old ) is : cellulose 39 . 56 % , lignin 31.58 % , pentosan 14 . 77 % ;

本文通过对板栗木材密度与年轮宽度的研究表明，板栗木材年轮宽度较窄，为0.21cm，近髓心宽度较大，后期呈较平稳的下降趋势；

The annual ring of Chinese chestnut , Castanea mollissima , is as narrow as 0.21 cm . Although the breadth near the pith is big , it becomes steadily smaller with the tree age .

该文对日本人工林柳杉髓心方材进行系列高频真空干燥试验，掌握不同高频真空干燥条件下柳杉髓心方材的干燥特性并对干燥缺陷进行分析。

A series of radio frequency / vacuum ( RF / V ) drying tests were conducted on boxed-heart lumber of Japanese plantation species , sugi , and its drying characteristics and corresponding RF / V conditions were investigated .

方法对33例Ⅱ期或Ⅲ期的股骨头缺血坏死患者，进行了关节镜下髓心减压入路；

Methods Thirty three patients with ischemic necrosis of femoral head in ⅱ or ⅲ stage were treated by medullary center decompression and free periosteum implantation under the supervision of arthroscope or transplantation of iliac bone flap with vascular pedicle through joint capsule .

研究结果表明：白桦不同嫁接方法其成活率有显著差异，水培靠接与髓心形成层贴接成活率较高，分别是85.2%，47.4%；

The results indicated that : There are significant differences among the various graft methods . The survival rates of inarch graft with bottle of water and approach grafting between cambium anti pith were higher than others . They are 85.2 percent and 47.4 percent respectively .

一年生不同品种枣实生后代枝条解剖性状各指标中二次枝的变异普遍大于一次枝，其中二次枝的皮材比和髓心大小变异最大。

The indexes of anatomic structure of one-year-old seedlings of different cultivars shows that the variation of the secondary branches is larger than the primary ones , among which the variation of the ratio of the tegument vs. xylem and the size of pith are the most drastic ones .