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The study has shown:(1) With increasing sediment depth and the woody giblets, the total organic carbon, the extraction of benzene , the total humic acids and the unhydrolyte are enhanced, while the hydrolyte is decreasing.(2) According to the GC-MS analysis, n-alkane,n-alkan-2-ones and n-alkanones are composed mainly of long-chains,such a result is thought to be characteristic of a herbaceous input from 2300a.B.P. n-alkanones exist in the samples may be considered as the evidence of microorganisms activity.(3) It is showed that the lipids is more sensitive to the climate change than the floristic. The proxy of the pollen spore of the peat stratum is different from the normal environment proxy. It is one of the main reasons that the sensitivity difference of the bog vegetation reacting to the climate isn't accordant with the log of the fat molecule fossil and biology fossil.(4) The transformation of the peat organic carbon is under the influence of temperature,acidity,organic material constituting, etc, and it showed the up-trend with the depth. In the short-term scale, the conversion of the peat organic carbon is effected by seasonal water,regional climate and vegetations; while in the long-term scale, it is controlled mainly by the climate.(5) According to the comparing the orderliness of organic compound,vegetation giblets with the depth to the characteristics of the peat molecule fossil with the section, in the development of this peatmire, 1500a B.P(210cm)is regard as the borderline of the late Holocene, the keynote of the front period is warm with several cold fluctuations, and the trend of the back period is dry and cold although there were several fluctuations.
研究表明:(1)随深度的增高及植物残体中木本残体的增多,总有机碳、苯萃取物、总腐植酸、不被水解物含量逐渐增高,而易水解物含量减少;(2)GC- MS分析显示,正构烷烃,直链烷基2-酮和正烷醇均以长链组分为主,揭示了该泥炭柱剖面2347a.B.P的母源输入以草本植物为主;甲基酮类和短链正烷醇的存在是微生物活性很大的生物证据;(3)通过有机分子标志物与孢粉、植物残体等指标的对比研究表明:脂类化合物对气候变化的反映要比植物种灵敏得多,不同沼泽植物对气候变化的敏感性的差异是脂类分子化石记录与生物大化石结果很难一致的主要原因之一;(4)泥炭有机碳的转化受到温度、酸度、有机物质组成等很多因素的影响,短时间尺度,泥炭有机碳的转化受季节性降水、地方气候和植被等因素的影响;长时间尺度,泥炭地有机碳的转化,受气候条件控制;(5)总结泥炭分子化石特征、泥炭有机质各组分含量及植物残体组成随深度的变异规律,分析结果显示该泥炭地层形成过程中,1500a B.P(210cm)可作为划分前后晚全新世的界线,前期的基调是气候偏暖,但又有几次偏干冷气候的反复,后期气候以干冷为主,其间虽有几次上升波动,但整体趋势不变。
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And 0.4~0.6 respectively for the induction coil with round crosssection and rectangular cross-section; The magnetic flux density of coil made with round pipe was nonuniform, especially near the inner wall of coil turns that caused a fluctuation of electromagnetic pressure on the surface of liquid metal and had a bad effect for forming a sample with uniform cross-section and smooth surface; The system of screen and restraint magnetic field not only had an efficient effect on restraining the electromagnetic stirring and stablizing meniscus, also caused the conecial periphery of melt to be vertical; The position of top and S/L interface of melt had a direct effect on the meniscus shape. The meniscus profile varied from cone-shaped through column to cucurbituceous shape with the increase of top height or decrease of S/L interface.
对圆形截面、矩形截面感应圈来说D/H分别取0.7~1.1,0.4~0.6较为理想;对多匝感应圈来说,在匝间处存在漏磁,易引起熔体表面起伏不平,这种现象在用圆铜管绕制的感应圈中较为明显;屏蔽—抑流系统的加入可以消除电磁搅拌,使熔体稳定性增强,同时可使形态呈锥形的熔体侧面变得垂直成为理想形态;熔体上液面、固/液界面的选位直接影响成型形态,上液面升高,熔体形态经历锥形→柱形→葫芦形的转化,固/液界面下降则经历锥形→葫芦形的转变。
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Polystely Having many steles, as in the stems of some Selaginella species.
多体中柱:指具多个中柱,比如在一些卷柏属植物的茎中。
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The smaller ones are ca 70 nm wide and join the tectum and the larger columellae. These larger ones appear to be composed of several 70 nm in width rods. They join the distal surface of the foot layer. The proximal surface of the foot layer is marked by a white line (referred to as a junction plane) where it joins the endexine.
柱层中有种大小同的柱体,较小的宽约70 nm接盖顶层和较大的柱体,而较大的柱体是由多个宽70 nm的棒物所组成的,它们会和基层末端相,而基层顶端表面有著明显分布的白线特徵,就好像是它与外壁内层的接合面。
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Said simple building comprises building body, roof and pool inside room; the lower building body is complete closed, the upper building body is provided with pillar on lower building body, and is circled with sun-shading net around pillar, the outside of sun-shading net is equipped with movable curtain; the roof is straw roof and has two sides along ridge; the pool inside the room comprises cultivation pool and laying-up basin, each cultivation pool is provide with a overflow bench, the bench surface is equipped with a cushion and the cushion is fixed on slope bench with a plurality of bracing column of same height, and a bamboo curtain is placed on the bracing column for young wood frog rest.
该简易房,包括房体、屋顶和室内池,其下房体为全封闭体;上房体是在下房体上设有房柱,再用遮阳网沿房柱排列的走向围拢,在遮阳网的外面还设有活动帘;屋顶为稻草屋面,沿屋脊坡向两面;室内池包括养殖池和蓄水池,每一个养殖池中均设有漫坡台。坡台面上设有软垫,并有相同高度的多根支撑柱钉穿过软垫固定在坡台上,支撑柱钉上再放置供幼蛙栖身的竹帘。
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epidermis:皮 细胞层
2 皮细胞层(Epidermis) 亦称真皮层,是位于底膜外侧的排列整齐的单层细胞层,相邻细胞间靠桥粒体结构进行联结,由它分泌形成表皮. 皮细胞的形态结构随变态与脱皮而发生周期性变化,平时皮细胞很薄;但在脱皮过程中,皮细胞多呈柱形,
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rhizoid:假根
每个细胞内含有一个或二个核.苔藓植物是一类小型的多细胞绿色植物,多生于阴湿的环境中.植物体有假根和类似茎,叶的分化,简单的种类呈扁平的叶状体.植物体的内部构造简单,假根(rhizoid)是由单细胞或单列细胞组成.无中柱,
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Myricaceae:杨梅科
杨梅科(Myricaceae)杨梅属(Myrica ),亚热带常绿乔木. 果为圆形或稍扁圆,果顶平,有的品种具有缝合线. 果实表面多为红色或紫黑色,也有白色品种. 果实的中果皮由多数称为肉柱的囊状体密集而成,肉质柔软,汁多,味酸甜. 鲜果中含钙,磷,铁,
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polystele:多体中柱
polyspermism 精液过多 | polystele 多体中柱 | polystichalbin 耳蕨白素
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raffinate:萃余液
已经用于二甲苯异构体分离、石油馏分中正构烷烃分离、葡萄糖与果糖分离等方面. SMB系统构成如图1所示,多根色谱柱首尾相接成一闭环系统,进料(Feed)和洗脱液(Eluent)入口与萃取液(Extract) 和萃余液(Raffinate)出口将之分为四区. 每隔一定时间Δt,
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cross head pin:十字头销
赫格隆(HAGGLUNOS)内曲线多作用径向柱塞壳转式油马达在No.2克令吊油马达前端盖后打开解后发现,该油马达八只活塞中的五只连杆折断,部分滚动体(Cam Roller)从十字头销(Cross Head Pin)上脱落,导轨(Cam Ring通称定子)内表面磨损,