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Actinodromous(palmate; digitate) Describing a form of leaf VENATION in which three or more primary veins radiate from the base of the lamina toward the margin, as in sycamore, resulting in a leaf that has several large lobes or several leaflets all originating at the same point.

具掌状脉的:叶子脉序的一种类型。是由叶基分出多条主脉,主脉间又多次分枝,形成细脉。结果往往是在一片叶中,具有起源于同一点的多个裂片或小叶。

The effects of electroforming process parameters on manganese contents in the electroformed layers were studied.

结果表明,电铸层中的锰含量随电流密度的增大而增加,随脉间的增大而减小。

The results of character evolution history reconstruction shows the SC in PT and AD clade might be a homoplasy character; also, the SC in PT clade might have multiple origins. SC in Pteridaceae has some special characteristics:(1) the cell long axes usually run parallel to the lateral veins;(2) Most of Pteris and Adianum species have VSC only in lower epidermis;(3) Species have ISC also have VSC.(4) Presence of spicular cells is highly correlated with the long veinal epidermal cells. Species have type III silica deposition type usually have longer and narrower veinal epidermal cell compared with ordinary epidermal cells; Species have type IV silica deposition type also have long epidermal cells, but not significantly different from ordinary epidermal cells.

本实验中亦发现凤尾蕨科之矽异形细胞具有几项特色:(1)矽异形细胞之长轴多与叶片侧脉方向平行(2)发现多数铁线蕨属以及凤尾蕨属植物仅下表皮具有脉上矽异形细胞;(3)具有脉间矽异形细胞的种类会同时具有脉上矽异形细胞;(4)长条形的侧脉上表皮细胞与矽异形细胞具有相关性,仅具脉上矽异形细胞的分类群之脉上表皮细胞均较一般表皮细胞细长;具有脉间矽异形细胞之物种之脉上表皮细胞亦为长条形但形态与一般表皮细胞常无明显形态差异。

Observations on the dichotomous leaf venation of Circaeaster agrestis found no intermediate forms of the fusion of vascular bundles between the two completely fused commis-sural veins of anastomoses and the two separate approximate veins, but found different degrees of the vestige of commissural veins .

在星叶草叶二叉分枝脉序中,网结脉中2条完全汇合叶脉与靠近脉中完全分离叶脉间未发现任何形式的维管束汇合的中间类型,相反观察到了网结脉中不同程度的连接脉退化的痕迹,因此网结脉不可能由靠近脉形成;盲脉的出现与齿的退化、网结脉中连接脉的间断及非网结脉由分枝处间断等相关;上述事实表明星叶草叶的二叉分枝脉序应为一减化性状。

We named the spicular cells which forming false veins interveinal spicular cells, and the spicular cells on veins are veinal spicular cells in this thesis.

本论文将此构成假脉之细胞称为脉间矽异形细胞(interveinal spicular cell, ISC),而将分布於叶脉上的矽异形细胞称为脉上矽异形细胞(veinal spicular cell, VSC)。

General yellow-green or yellow interveinal chlorosis of fully expanded and younger leaves with major veins and most minor vein clearly defined green without appreciable adjacent green lamina; some younger leaves with profuse interveinal brown necrotic spotting.

甜菜缺铁:完全展开叶的脉间褪绿一般黄绿色或黄色,嫩叶的主脉和大部分侧脉明显显示绿色没有可察觉的相连的薄层;一些嫩叶脉间有大量褐斑。

Leaves opposite , very rarely stipulate, petiolate, entire, leathery to papery, usually glabrous; secondary veins usually prominent, numerous to few, oblique to perpendicular to midvein; tertiary veins reticulate, with adaxial brownish transvenous resin canals and abaxial linear or intervenous translucent glands; petiole often with basal liguliform appendage.

叶对生 ,极少具托叶,具叶柄,全缘,革质到纸质,通常无毛;次脉通常突出,许多对很少,偏斜到与中脉垂直;第三脉网状,具正面带褐色的transvenous树脂道并且背面线形或脉间的半透明的腺体;叶柄通常具基生舌状的附属物。

Results Cuticular papillates,glandular hairs,peltate scales,and non-glandular hairs presented on the leaf epidermis of C.paliurus.Anomocytic stomata were confined to the lower epidermis.Large cluster crystals existed in the uppermost layer of palisade cells.Midrib included one closed vascular system and one additional vascular strand.Secondary veins are semicraspedodromous and form marginal loops,tertiary veins are percurrent,quaternary veins form orthogonal or polygonal areoles filled up by branched and freely ended veinlets.

结果青钱柳叶表皮有许多小乳突,腺毛,盾状鳞片和非腺毛表皮毛;气孔器不规则型,仅分布于下表面;靠近表皮的叶肉组织中有规律地分布含簇晶的细胞;主脉中维管组织环状,封闭,具有一个副维管束;二级脉在叶缘内分支,相互连接形成脉环,三级脉及顶型,脉间区内充满分支的自由结束的小细脉。

In order to know the evolutionary relationships between false vein, ISC, and VSC in Pteridaceae, 19 grnera and 82 species in Pteridaceae were sampled in this study; silica deposition types, ordinary epidermal cell morphology and veinal epidermal cells morphology of these species were surveyed. On the other hand, a convenient method was developed for this goal. In this method, a tabletop SEM with backscattered electron detector accompanied by post-cooling method was used.

为进一步探讨凤尾蕨科假脉、脉间矽异形细胞与脉上矽异形细胞之间的关系及其於凤尾蕨科内的演化,本论文选取19属82种的凤尾蕨科植物,观察其叶表面之二氧化矽堆积型式、一般表皮细胞形态以及脉上表皮细胞形态;同时,也开发出利用侦测背向散射电子之桌上型扫描式电子显微镜配合后冷却技术(post-cooling method)之快速检测法,该方法利用背向散射电子讯号强弱与平均原子数(average atomic number, Z number)之相关性得到矽异形细胞与一般表皮细胞具有明显对比之影像。

And pulsation damper used simultaneously, the pulsation damper to be an in between pumps and back-pressure Bellows Seal Valves valve in order to absorb the pump and back-pressure valve between the flow peak.

与脉动阻尼器同时使用时,脉动阻尼器应安在泵与背压阀间,以吸收泵与背压阀间的流量峰值。

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