分枝

In chapter 3,we dig out two families of invariant quartic curves of a quadratic system.

第五章讨论向量场具有对称中心的二次系统，利用系统的不变双曲线及不变四次曲线，我们确定了一个对应极限环（1.1）分布的二维参数区域，其边界的构成为如下几种常见的极限环分枝：霍夫分析，庞加莱分枝，同宿分枝和异宿分枝。

In terms of fractal characteristics for tree branches, growth for different branching types was simulated with L-studio software based on the basic concepts of L-system and turtle interpretation. Graphics of tree branches become more colorful and vivid by introducing randomicity factors from L-system.

基于树木分枝的分形特征，在简要介绍林氏系统语言基本概念和海龟解释基础上，应用L-studio软件编写林氏系统语言程序对不同枝条的分枝类型进行生长模拟，并通过引入随机性因子使得应用林氏系统生成的树木分枝图形更加丰富多彩和形象逼真。

Leaves opposite or rarely alternate, subequal in size; stipules lanceolate, 7-10 mm; petiole 1.5-6(-10) cm, densely pubescent; leaf blade dark green or black when dry, oblate to 5-angled or oblate to orbicular-ovate, often ovate in upper stems, 8-12(-18)× 7-14(-22) cm, papery, secondary veins 2 pairs along midvein, abaxial surface densely pubescent along veins and veinlets, adaxial surface roughish, densely strigose, base truncate, subcordate, or broadly cuneate, margin coarsely 8-12-dentate, teeth gradually larger distally, often biserrate apically, apex 3-cusped or lobed, tip serrulate. Glomerules on axillary spikelike flowering branches, male branches often branched, 8-17 cm; female spikes distal, unbranched or branched, 5.5-24 cm.

叶对生或很少互生，大小近等；托叶披针形，7-10毫米；叶柄1.5-6(-10)厘米，密被短柔毛；叶片深绿色或黑色的干燥时，扁球形到具5个角或扁球形的到圆形卵形的，通常在上面茎内卵形的， 8-12(-18)* 7-14(-22)厘米，纸质，次脉2 对沿中脉，背面密被短柔毛的沿脉和细脉，正面微糙，密被糙伏毛，基部截形，近心形，或宽楔形，团伞花序在腋生的穗状的花枝，雄性分枝通常分枝，8-17厘米的；雌性穗状花序上部，不分枝或分枝，-24 厘米。

In this study we build a Mycobacterium marinum random mutant libratory with MycoMarT7 transposon phage, found two cell wall virulence genes with colony morphology and cording structure strategy and build up virulence detection system in cell and animal model. We concluded that PDIM is critical for the virulence of Mycobacterium marinum.

本课题利用MycoMarT7噬菌体建立了海分枝杆菌随机突变库，以海分枝杆菌为模型筛选出两个分枝杆菌细胞壁毒力相关基因，并建立了海分枝杆菌的毒力检测系统，发现PDIM在海分枝杆菌的致病性中起到重要重要的作用。

Trees evergreen; trunk monopodial, straight; branches nearly whorled; branchlets ridged and grooved, with each leaf borne on a persistent, peglike base; short branchlets absent; winter buds ovoid, conical, or subglobose, resinous or not, scales on terminal buds recurved or not, persistent at base of branchlets.

常绿乔木树干单轴分枝，直；分枝差不多轮生；小枝具脊和凹槽，有每叶生于一持久，钉状基础；短小枝无；卵球形，圆锥状的冬芽，或近球形，与否树脂，由顶芽开出的鳞片与否，宿存在基部的小枝。

Results: Cultures for Mycobacterium were positive in a total of 2657 people, among them 1848 strains (69.55%) were Mycobacterium tuberculosis, and 809 strains (30.45%) were Nontuberculous Mycobacterium. Among the 1848 strains of Mycobacterium tuberculosis, 337 strains (18.24%) were drug resistant, and 75 strains (4.06%) of them were resistant to both Isoniazid and Rifampin which made them multi-drug resistant. Among the 548 strains of Nontuberculous Mycobacterium, 453 strains (82.66%) were drug resistant. There were a total of 261 rapidly growing mycobacteria, and 242 (92.72%) of them were drug resistant.

结果：分枝杆菌培养阳性共2657菌株/人，其中1848株(69.55%)为结核分枝杆菌，809株(30.45%)为非典型结核分枝杆菌感染。1848株结核分枝杆菌中，337株(18.24%)有抗药性问题，其中75株(4.06%)同时对Isoniazid和Rifampin有抗药性为多重性抗药菌。548株非典型结核分枝杆菌中453株(82.66%)有抗药性问题；快速生长菌群共261株，其中242株(92.72%)有抗药性问题。

The green stem, big leaf, few branch, mauve flower type and the purple stem, big leaf, few branch, purple flower type were classified into one class. The green stem, small leaf, multibranch, mauve flower type, the green stem, big leaf, multibranch, purple flower type, the green stem, small leaf, multibranch, mauve flower type, and the purple stem, small leaf, multibranch, purple flower type were classified into another class.Conclusion The artificially cultivated S.

其中，绿茎、小叶、少分枝和紫色花类型与普通类型各自聚为一类，绿茎、大叶、少分枝和淡紫色花类型与紫红茎、大叶、少分枝和紫色花类型聚为一类，绿茎、小叶、多分枝和淡紫色花类型，绿茎、大叶、多分枝和紫色花类型，绿茎、小叶、多分枝和淡紫色花类型与紫红茎、小叶、多分枝和紫色花类型聚为一类。

The results show that the genetic distance between Lumbrineris tetraura and Chloeia parva is 0.044, Lumbrineris tetraura-Chloeia parva and Capitella capitata is 0.057, Lumbrineris tetraura and Marphysa sanguinea is 0.091, which means Amphinomidae is a ingroup taxon of Eunicida.

结果显示，四索沙蚕－梯斑海毛虫分枝的遗传距离为0.004，－小头虫分枝的遗传距离为0.072，四索沙蚕分枝与岩虫分枝的遗传距离比较大，为0.091。

The fusion DNA fragments of ag85b-mpb64 and ag85b-mpb64-esat-6 were obtained by PCR andSOE technique. Various DNA vaccines were constructed with the pcDNA3.1: fusion of two genes, and of three genes, bivalent combinations and trivalent combinations(pCA+pCM+pCE6). BALB/c mice were vaccinated with this DNA vaccines.The mice injected withBCG were positive control and the mice injected with pCDNA3.1 and PBS were negative control.The mice were immunized 3 times with 2-wk intervals. The animals in group BCG were only inoculatedsubcutaneously with 1×10~6 CFU BCG at initial vaccination. The serum IgG titers and IgG isotype weredetermined using iELISA coated with M. bovis PPD and rMAE protein expressed and depurated inprokaryotic expression system every week.

同样，利用PCR和SOE技术，获得牛分枝杆菌mpb64-ag85b和mpb64-ag85b-esat-6融合基因，以pCDNA3.1为载体构建了牛分枝杆菌多价组合和多基因融合DNA疫苗：二基因融合(pCDNA3.1-MPB64-Ag85B，简称pCMA)和三基因融合(pCDNA3.1-MPB64-Ag85B-ESAT-6，简称pCMAE)DNA疫苗；二价组合和三价组合(pCA+pCM+pCE6)DNA疫苗，免疫BALB／c小鼠，以牛分枝杆菌BCG免疫组为阳性对照，以pCDNA3.1及PBS免疫组为阴性对照，共免疫3次，每次间隔2周，BCG组仅初免时皮下免疫1次。1免后每周，以原核表达纯化的重组MPB64-Ag85B-ESAT-6蛋白和牛分枝杆菌PPD为包被抗原，以间接ELISA方法检测血清IgG水平及lgG亚类。

After the microscope through the cultivation of detection, slender hyphae, bifurcation, and short stem hyphae collateral for its health or the alternate on the branch, the branch can continue to branch, forming two, three branch , is the end of vase-shaped branching stems, spores observed liquid spherical sporangium producers body, the formation of conidia oval eggs, smooth-walled.

通过培养后显微镜观察检测，菌丝细长、分叉多，梗为菌丝的短侧枝，其上对生或互生分枝，分枝上又可继续分枝，形成2级，3级分枝，分枝末端即为瓶状梗，孢子液制片观察到球形孢子囊体，分生孢子卵形成椭圆形，壁光滑。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。