对轴

Mutants withdefects in epiboly, axis, somite, head, and cardiac and blood systems were identifiedby observing morphological changes in F3 embryos. Additionally, in situhybridization was adopted to identify mutant lines with altered expression patterns ofdpr2, frb35 and insulin.

通过对 F3 代胚胎的表型观察，鉴定了在外包、体轴、体节、头部、心血管系统等表现异常的突变体；通过原位杂交的方法，筛选了 dpr2，frb35 和胰岛素基因表达异常的突变体。

The effects of 4-PU and 6-BA on formations of the calli and adventitious buds from epicotyl explants in peanut were studied in the experiment.

摘 要：以'汕油523'花生上胚轴为外植体，研究细胞分裂素4-PU和6-BA对愈伤组织诱导及不定芽发生的效应。

Mycorrhizal seedlings were cultured. Results were as the follow. 5. 1 Soaking seeds with 4cm radicle in GA (100ppm) for 24 hours and low temperature (2～4℃) for 25 days could absolve the dormancy of epicotyl.

通过对牡丹菌根化苗的培养观察认为： 5.1 胚根伸长4cm以上的种子用GA（处理24小时）和低温（2～4℃）25天皆可解除牡丹种子上胚轴休眠。

Result Based on directly regenerated plant of in vitro plant of Xinjiang cotton, the cotton epicotyl treated by pre-culture for 3-5 d was immersed in bacteria for 15 min and co-cultured for 2 d. Cephalothin at 100 mg/L was used to inhibit bacteria after 50 mg/L kan selection. And the combination of cytokinin with relatively high content and auxin with low content was used in its directly budding culture to obtain resistant seedlings.

结果］在新疆棉花离体培养植株直接再生植株基础上，经3~5d预培养处理过的棉花上胚轴，在浸菌15 min共培养2 d后，经50 mg/L kan筛选，用1000 mg/L头孢霉素抑菌，并用相对高含量细胞分裂素和低含量生长素的组合对其进行直接出芽培养，从而获得抗性小苗。

This research aimed to optimize the organogenesis of epicotyl segments and to efficiently obtain transgenic plants of 'Bingtang' sweet orange (Citrus sinensis L. Osb.), an elite citrus cultivar in China.

本研究的目的是对冰糖橙上胚轴再生芽的器官发生条件进行优化并且有效地获得转基因柑橘植株。

The epicotyl of broad bean was irradiated for 7 h by 1.02,3.03,4.52 kJ·m -2 UV B respectively in the ambient condition of 70 μmol·m -2 ·s -1 photosynthetically active radiation in the growth cabinet.

根据蚕豆丙二醛、抗坏血酸和 UV- B吸收物的含量变化，来测试激光对 UV- B照射蚕豆的上胚轴的保护作用。

ResultBased on directly regenerated plant of in vitro plant of Xinjiang cotton,the cotton epicotyl treated by pre-culture for 3-5d was immersed in bacteria for 15min and co-cultured for 2d.Cephalothin at 1000mg/L was used to inhibit bacteria after 50mg/L kanselection.And the combination of cytokinin with relatively high content and auxin with lowcontent was used in its directly budding culture to obtain resistant seedlings.

结果在新疆棉花离体培养植株直接再生植株基础上，经3～5d预培养处理过的棉花上胚轴，在浸菌15min共培养2d后，经50mg/Lkan筛选，用1000mg/L头孢霉素抑菌，并用相对高含量细胞分裂素和低含量生长素的组合对其进行直接出芽培养，从而获得抗性小苗。

In addition ,the thesis deals with amount of components devices and calculations ,including :(1) Choice of the main shaft and disposal of transmission , by doing so to ensure the accuracy of components machining in process when the main shaft rotating;(2)The device and check of the transmission shaft ,so it can assure the rigidity of the shaft is allowable ;(3) Gear device and calculations ,check the performance in the strength and rigidity of it ;headstock is a very important part in this thesis ,the design of it here not only ensures the rationality 、equipoise and stability of the motion of the slipway ,but also satisfies the requirements of different work environment .

液压装置的设计液压滑台、定位夹紧装置均为液压控制。并采用了许多液压控制阀，保证了运动的平衡性，循环性和精确性。另外，本文还涉及到大量的设计和计算，包括：（1）、主轴的选择和传动布置，以保证加工过程中被加工零件的精度；（2）、传动轴的设计和校核，以保证轴的刚度；（3）、齿轮的设计、计算，对齿轮的强度和刚度进行校核；多轴箱部分是本次设计的重要环节，本次设计中它的设计既要保证工作台的运动的合理、平衡和准确，又要满足工作要求。

Based on Crank-Nicoson's technique, and a new approach for the numerical simulation of the model is raised. The truncation error of the one step difference method reaches O (△t^2+△x^2) and of quite good stability condition.

基于Coriolis加速度和Lagrangian应力公式，利用Newton第二定律导出轴向加速度运动弦线横向振动的动力学模型；通过线性变换将方程化为一阶无量纲的非线性微分方程组；并利用Crank-Nicoson的中点离散技巧，给出运动方程的单步二阶差分方法；算法把对运动方程和本构方程分别离散，使之可以用于不同本构的运动弦线的数值仿真。

We reviewde their documents and exam all patients. The examination include refraction,strabismus ( exophoria was noted down with negtive,and esophoria with postive ),eye axial length,postive relative accommodation and negative relative accommodation.

回顾以往资料并对两组试验对象进行检查，检查项目包括屈光度、眼轴长度、远近隐斜度和40cm处加+1.00Ds时的隐斜度(外隐斜用负数记录，内隐斜用正数记录)、AC／A率及正、负相对调节等视光参数。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐