纹孔
- 与 纹孔 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Tylose A bladderlike ingrowth from a parenchyma cell into an adjacent tracheid or vessel through a paired pit.
侵填体:薄壁细胞向内生长的泡状物通过纹孔伸入相邻的管胞或导管形成的结构。
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A special structure on cotyledon surface of Glycine species was also analysed by SEM.
本研究利用扫描式电子显微镜观察大豆属物种子叶表面的特殊构造-纹孔。
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As a result,the ray tracheid inner wall has sawtooth thickening obviously.The pit of cross field is windows and pine shape.The ratio of the tracheid length to width is about 50.Airdry density is about 598kg/m3.The shrinkage of difference is about 1.8;1%NaOH extraction and cell...
结果表明:紫杉木材射线管胞内壁锯齿状加厚明显,交叉场纹孔多为窗格状,偶尔为松型;管胞的长宽比平均值约为50,气干密度平均为598kg/m3,差异干缩约为1.8;1%NaOH抽出物、乙醚抽出物、纤维素含量较落叶松高,木素含量比落叶松低,其它化学指标与落叶松相近。
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As a result, the ratio of the inner-and out-apertures of bordered pits in tracheid, gymnosperm, was 3: 1, in tracheary elements of rattan and bamboo, 1: 1. Other parameters among these plants were various.
结果表明:裸子植物管胞和竹、藤管状分子具缘纹孔的内、外口比例分别约为3:1和1:1,其它各项结构参数均存在较大差别。
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The anatomical study deepens the knowledge of G-type conducting cells: 1 It proves the theory of two depositional process for secondary wall (Bierhorst, 1960): the discontinuous cellulose layer is laid down before the continuous lignified layer; the former layer is prone to be broken down, while the latter is highly decay-resistant; 2 It suggests that the cellulose primary and secondary walls of tracheids are not perforated. Instead of longitudinal pits (Li, 1992), the lignified tracheid secondary wall of Hsüa possesses irregular simple perforations; 3 In Hsüa reflexa and Huia gracilis, the perforation casts may represent the thickness of lignified secondary wall; 4 The wall structure of G-type tracheid is diversified. At the genus level, the secondary wall structure differs in the distribution, internal shape and structure of the perforations; 5 Perforations of some G-type tracheids combine the characters of S-type tracheids in their distribution, density and diameter.
解剖学的研究加深了对G-型输水管胞的认识 1)验证了管胞次生壁分两个阶段形成的理论(Bierhorst,1960),即先后形成不连续的纤维质层和连续的木质化层,前者易被分解,后者抗侵蚀性强;2)证明管胞纤维质的初生壁和次生壁不具穿孔,Hsüa管胞的木质化次生壁具有不规则的简单穿孔,而不是纵列的纹孔(Li,1992);3)Hsüa reflexa和Huia gracilis的穿孔铸体可代表木质化次生壁的厚度;4)G-型管胞壁层结构具多样性,植物属一级的分异主要表现在次生壁穿孔的分布、孔腔形状和结构的不同;5)某些G-型管胞的穿孔在其分布、密度和孔径方面可兼有S-型管胞的特征。
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Pit A gap in the secondary cell wall that enables communication between thickened cells,e.g. tracheids.
纹孔:位于细胞次生壁的小孔,使得加厚细胞之间通讯得以进行,如管胞。
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The relationship between softwood longitudinal permeability and its structure was systematically studied based upon the principles of flow.
文首次提出搭接面及侧面胞壁上纹孔在流体纵向渗透时的不同作用,并运用流体力学的原理,对针叶树木材流体纵向渗透性与其构造的关系进行了系统分析。
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Because the strength of springwood was very low, the strength of board which included more springwood was low. The main reason why there was no difference in wet compressing shear strength between quarter-sawn board and flat-sawn board was that quarter-sawn board had a lot of pits on radial cell wall and in flat-sawn board xylary rays were transversely cut and left a lot of pores which provided a kind of tunnels for water.
造成柞木径切板的反复煮沸压缩剪切强度与弦切板的反复煮沸压缩剪切强度没有显著性差别的主要原因是柞木细胞壁径面上的纹孔很多,而弦面上的木射线在经刨削后是横断的,留下许多孔隙,这使得弦径向均有成为水分通道的孔隙,造成柞木径切板的反复煮沸压缩剪切强度与弦切板没有显著性差别。
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From view of wood construction effecting, the article analyzes affecting factors of wood main micro-constructions such as tylosis and bored pits in processing of wood chemistry soaking with fire retardants, the article also analyzes existing condition of moisture in wood and relationship between moisture moving in wood and wood chemistry soaking technology treated with fire retardants.
从木材构造对化学阻燃浸渍处理工艺影响的角度,指出在木材化学阻燃浸渍处理过程中,影响阻燃剂在木材中渗透性的木材主要微观构造有浸提物、纹孔等,分析了木材中水分的存在状态和木材中水分的移动与木材化学阻燃浸渍处理工艺的关系。
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The tracheary elements in secondary xylems of Actaea asiatica root and rhizomes were observered with a scanning electron microscope and found to contain abundant types, which mainly included tracheids, tracheid-like vessels, fibriform vessels, and typical vessels. Of these types, the tracheids, tracheid-like vessels, fibriform vessels were first found. Scalariform perforation plates, reticulate perforation plates, mixed perforation plates and simple perforation plates were observed in the typical vessels and the reticulate perforation plates ,mixed perforation plates were first founded the lateral-wall perforation plates, multiple end walls and pit membrane vestige were also observed in the tracheary elements.
利用扫描电子显微镜对毛茛科类叶升麻根和根状茎次生木质部中的管状分子进行观察,发现其管状分子类型丰富,主要有:管胞、管胞状导管、纤维导管和典型的导管分子,其中管胞、管胞状导管和纤维导管为在该类群中首次报道;在导管分子中,存在着梯状穿孔板、网状穿孔板、混合型穿孔板和单穿孔板,其中网状穿孔板和混合型穿孔板为在该类群中的首次报道;对其导管分子上的侧壁穿孔板、多穿孔板和纹孔膜残余也进行了描述。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。