向细胞的

The goal is to simplify the neural-computing of biovision process modeled inthe Boundary Contour System of FACADE theory, and to extract subjective contour in.a new way. The procedure consists of DOG filtering, cooperative filtering,post-processing of cooperative cues and regrouping of endpoints, corresponding to theoriented edge filtering by simple cells, cooperative filtering by bipole cells and end-stopeffect formulated by hypercomplex cells in biovision system respectively. The last oneis an algorithm based on connection relation graph, which judges whether two keypoints should be connected according to their positions and orientations and thenconnect the key points that Should be connected to complete the subjective contour.

本文主要完成了以下工作：一是针对张量投票方法处理主观轮廓时出现的问题进行了改进，并依据矩阵的特征值摄动理论分析了该方法误差产生的原因以及迭代对其影响；二是用图像处理方法代替FACADE理论中复杂的细胞动力学方程，提出了一种基于视觉竞争合作机制的轮廓组织及缺口修复算法，该方法通过DOG滤波器组、合作滤波器组和张量投票等方法分别模拟视觉系统中的简单细胞有向滤波、双极细胞合作滤波和终端截断后端点重组等主观轮廓形成过程；三是提出了一种基于可连接关系图的算法解决轮廓组织及缺口修复问题，该方法在轮廓特征提取的基础上，根据关键点的位置和取向信息判断其可连接关系，进而连接具有可连接关系但没有实际连接的关键点，最终完成轮廓缺口的修复。

The cells of the phellogengive rise externally to the PHELLEMand internally to the PHELLODERM.

木栓形成层的细胞向外产生木栓层，向内产生栓内层。

TGF-β1 is the major factor of chondrogenesis while 10 μg/L is the best inducing dosage.

MSCs在一定诱导条件下可以向软骨细胞分化，转化生长因子β1（TGF-β1）是诱导MSCs向软骨分化的关键性因素，10 μg/L是其最佳诱导剂量。

The digestion process includes the following steps: adding 0.15 % concentration collagenase II solution compounded with DMEM into blood vessel smooth muscle tissue block and acting in water bath for 1.5 hr until forming floccular tissue; cleaning with 0.02 % EDTA solution, adding 0.125 % trypsase solution and water bath vibrating to digest at 37 deg.c to obtain dispersed smooth muscle cells; terminating enzyme action with 10 % new born ox serum culture liquid; regulating cell concentration with 20 % new born ox serum culture liquid to 50,000-500,000/L, inoculation, and culturing in culture tank with 5 % CO2 and first 37 deg.c to cell fusion of 70-80 %; and subculturing conventionally.

向血管平滑肌组织块中，加入用DMEM配制的0.15％胶原酶II溶液，水浴箱中作用1.5h，至组织呈絮状，用0.02％的EDTA清洗，然后，加入0.125％胰蛋白酶溶液，于37℃水浴振荡消化，即可得到分散的平滑肌细胞，用10％新生牛血清的培养液终止酶的作用。加入含20％新生牛血清的培养液，调节细胞密度为5×104～5×105个/L，接种，放入5％CO2、37℃培养箱中培养。当细胞达到70％～80％融合时即可按常规方法传代。

From the base to the crown in axial, the vessel-elements proportion increases in fluctuation, contrary to the ray proportion. The fiber proportions in the regions of base and crown are less than that in the trunk of tree, and fluctuate at 65% or so. The parenchym proportion increases quickly to the 1.3m height of tree, reaching the maximum at 9.52%, and then decreases quickly to the 3.3m height of tree (8.90%); afterward it leveled off and increases slightly.

组织比量轴向变异表现为随树高增加导管比量波动性递增，与木射线比量相反；纤维比量在近根区和近冠区稍小，而主干部稍大，并在65%左右波动；轴向薄壁细胞比量先随树高增加急剧增加，到1.3m树高处达最大值（9.52%）后又急剧降低至3.3m树高处的8.90%，以后基本稳定并在波动中略有增加。

Three-dimensional Matrigel constructs contained aleolar forming units comprised of cells displaying AE2 cellular ultrastructure while expressing the SpC gene and gene product. The addition of tissue-specific growth factors induced formation of branching, sacculated epithelial structures reminiscent of the distal lung architecture.

通过对细胞亚微结构的观察和对SpC基因及其表达产物的分析，研究者发现培养体系中肺组织形成单位中具有能向肺泡II型上皮细胞分化的细胞；而通过添加组织特异性的生长因子，他们还发现这一做法会促进培养组织形成具有分支和囊状上皮结构的类似终末肺泡组织的形态结构。

The results showed that: at metaphase I, the homoeologous chromosome pairing among different F1 hybrids ranged from 2.0 to 11.4 bi-valents formed by homoeologous chromosomes per pollen mother cell, and very few multivalents, and even very few bivalents were formed by two chromosomes within one genome rather than homoeologous chromosomes in some PMCs; at anaphase I, all biva-lents were disjoined and most univalents were divided.

结果表明在中期I阶段，这些杂种一代的近缘染色体联会变化很大，每个花粉母细胞中二价体形成的数目从平均2个到11.4个不等，甚至在某些花粉母细胞中，还发现极少的多价体和非部分同源染色体所形成的单基因组内二价体；在后期I时，所有的二价体分离，同时多数单价体也分离，分离的二价体和分离的单价体都移向两极，从而形成两组染色体；因为这时完整花粉母细胞中分离的二价体在两组染色体中总是对应出现，从而根据半二价体上染色体重组的位置可以分析在二价体的四分体时期发生在非姊妹染色体之间的多种染色体交换类型，如单交换、三线双交换、四线双交换、四线三交换和四线多交换。

VE-cadherin moved away from the transmigration site to different ends of it, whereas PECAM-1 opened to surround the periphery of a transmigrating PMN.

我们发现在PMN穿过内皮细胞层时，这两种连接体蛋白都不会突然消失，而是发生了渐进的相对移动--相邻内皮细胞间原本彼此接合的VE-cadherin会沿著细胞间的界线移向PMN两端；而PECAM-1的变化则是打开原本彼此间的键结，改而围绕在PMN周边。

This study will contribute to a better understanding of mechanism of bone remodeling during tooth movement which may set the basis for clinical work. Methods1. Observe the expression of ATF4 protein in periodontal tissues after orthodontictooth movementA titanium-nickel closed-coil spring was applied to the occlusal surface of the rat maxillary first molar (M1) with a hook and the upper incisors with a ligature wire.

但正畸骨改建与骨发育是两种不同的生理过程，ATF4在正畸牙齿移动牙周组织的表达和分布，在机械力的作用下体外培养的人牙周膜细胞中表达变化的情况，以及在牙周膜细胞向成骨样细胞分化的过程中所起的作用，国内外尚未有报道。

Objective:The aim of the experiment is to search for the regulation that the hepatic stem cells abnormally differentiate into cancer cells. In the experiment,the variating regulation of PCNA,c-kit and c-myc in the formation and development of HCC will be interpreted with immunohistochemistry and RT-PCR. So,the initial mechanism that hepatic stem cells abnormally differentiate into cancer cells from the levels of cell,protein and gene will be clarified. The last,the inhibition to HCC with ulinastain will be studied,from which,a new way of clinical prevention and treatment for HCC will expect to be explored.

二、目的本实验旨在探讨以卵圆细胞为代表的肝干细胞在HCC发生、发展过程中在肝组织内分布规律，并通过免疫组化、RT-PCR等技术阐明PCNA、c-kit、c-myc在HCC发生、发展过程中的动态演变规律，从细胞、蛋白、基因三个水平初步研究卵圆细胞向癌细胞异常分化的机制，同时观察乌司他丁对HCC发生、发展的抑制作用，为肝癌的临床预防和治疗探索新的途径。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。