后体

First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

Results: The infected penaeid shrimps showed a rapid reduction in food consumption, lethargy, a pink to reddish-brown coloration and a loose carapace with white spots in succession, followed by ultimate death. The characteristic features of moribund shrimps were empty stomach, a pink to reddish-brown coloration, white spots on a loose carapace and swollen cephalothorax. The relative content of WSSV DNA in blood increased rapidly after the infected shrimp showed its first symptom of detestation of food.

结果：斑节对虾感染白斑症病毒后，依次表现出厌食、不活动、体色变红、甲壳出现白斑、反应迟钝直至侧卧死亡；濒死对虾的典型症状为空胃、红体、甲壳白斑、甲壳下水肿及甲壳易剥离；感染对虾出现拒食后，其血液中白斑症病毒 DNA的相对含量急剧增加。

Methodsafter total decompression of the spinal nerve through posterior medline approach, discectomy of the slipping segment was performed with a circular saw with diameter of 1.0 centmeter. under direct visualization through the hole of the circular saw, the disc tissue including cartilage of upper and lower end plates was removed with a long handle curette.

方法后正中入路脊髓神经根彻底减压后，用直径1.0 cm环锯摘除滑脱椎体间的椎间盘，然后通过环锯孔直视下彻底清除椎间盘髓核组织，用长柄刮匙刮除椎体上下终板软骨，使骨面成鱼鳞状。

After 13 months culture, sporophytes began to form. Each gametophyte had several archegonia, and only one sporophyte was produced per gametophyte. The first sporophyte frond was simple and had pinnate venation.

抱子体在经13个月的培养后开始产生，每个配子体虽然有许多的藏卵器，但只产生一株孢子体，第一片孢子体的叶片为单叶羽状脉。

However the addition order of tartrate and phosphate on activity of enzyme adsorbed by goethite produced the greatest impact.

胶体表面类型（硅氧烷表面或羟基化表面）及阴离子配体对胶体表面负电荷的贡献量在酶的吸附及活性保持中的重要性；B阴离子配体后加入时酶的吸附量一般比配体先加入时的高；C）配体加入顺序对二氧化锰的影响最显著，对砖红壤和高岭石的居中；对针铁矿的次之；对黄棕壤的最小。D）乙酸或草酸加入顺序对高岭石上固定化酶比活性的影响最大，而酒石酸或磷酸则对针铁矿影响最大。

The tryptophan residues play important roles in DNA photoreactivation catalyzed by CPD photolyases. We have investigated the action mechanism concerning Trp in DNA photoreactivation, and obtained the results as follows: 1 We proposed a mechanism of photosensitized splitting of CPDs by Trp and Trp-containing peptides. 2 Quantum yields of splitting of the model compounds that a Trp linked covalently a CPD were obtained under 290 nm light in various solvents, these values changing with solvent, range from 0.01 to 0.5. 3 Utilizing pulse radiolysis technique, splitting processes were observed in aqueous solution of the CPDs with hydrated electron and some oxidative species (such as hydroxyl radical, bromic radical and azide radical), and obtained their rate constants. In the case of interaction between CPD and hydrated electron, splitting of the CPD anion, and pyrimidine anion transfer an electron to FAD or Rf, were observed. The process rate was slower one order more than that in photolyase. Minor, but highly mutagenic UV-light-induced lesions are (6-4) photoproducts, which are repaired by (6-4) photolyases. These enzymes, discovered in 1993, are not well characterized and their mechanism is still under investigation.

我们研究它的作用机理，获得以下结果：1）建立了色氨酸及其肽对嘧啶二聚体光敏化裂解的直接修复作用机理模型；2）获得了色氨酸共价键连接于嘧啶二聚体的化合物在多种溶剂中290nm光辐照裂解的量子效率，其值随溶剂而变化，范围在0.01-0.5；3）运用脉冲辐解观察到嘧啶二聚体与水合电子和一些氧化性的自由基作用裂解过程，得到相应速率常数；对二聚体与水合电子作用发生裂解以及向FAD返还电子的过程进行了体外模拟；4）（6-4）光解酶的作用机理中一个关键假定是氧杂环丁烷中间体在接受电子后能自发裂解，恢复二嘧啶的结构。

The protein is then transported by specialized cesicles to a late endosome that later matures into a lysosome . The mannose 6-phosphate receptor recycles back to the Golgi for re-use .

溶酶体蛋白质即由特异的囊泡运输到后内吞体中，最终形成溶酶体。6-磷酸甘露糖受体回到高尔基体上重新使用。

The blasting excavation ways are the other factor of affecting overbreak as well as underbreak in the openings. So far, the research about the effect of blasting excavation to overbreak as well as underbreak is not be reported in the domestic. The openings perimeter shape that is be affected by blasting is researched from the angle of rock rupture.

论文旨在从岩体的破坏机理出发，对裂隙岩体开挖后的洞室周边分数维进行研究，提出了裂隙岩体洞室开挖周边的广义分数维模型，并且对不同影响参数与洞室周边分数维之间的关系进行分析，从分形理论的角度建立洞室周边广义分数维与洞室超挖之间的关系，从而建立了以岩体破裂机理为基础的超欠挖与广义分数维之间的关系。

The morphology of virions seems to not be change after incubated with the paeonol by electron microscope. The regained infectivity of TMV recovered by dialysis from incubation with paeonol in vitro showed that the paeonol have not direct viricidal effect. The paeonol did not reduce infectivity when applied before TMV inoculation. The paeonol in low concentration can restrain the polymerization of TMV coat protein in vitro. The paeonol did not reduced infectivity of TMV-RNA in vitro. It is proposed that the paeonol inhibited TMV by binding with TMV coat protein to interfere with recognition of a host receptor essential for infection or by interfering TMV-CP polymerization in plants. The anti-TMV activity of low molecular weight chemicals extracted from Polygonum cuspidatum were determined.

丹皮酚与TMV混合，电镜下观察对粒体形态没有影响；TMV与丹皮酚混和后透析可恢复侵染力，表明丹皮酚对病毒粒体并没有直接毒害作用；预先用丹皮酚喷施叶面不影响病毒的侵染，表明丹皮酚未干扰TMV对叶片侵染位点的识别；丹皮酚在低浓度时可阻碍TMV-CP的体外聚合，对TMV-RNA并无体外抑制侵染作用，据此推测丹皮酚对TMV的抑制作用可能主要通过其与TMV-CP结合影响病毒粒体对叶片表面侵染位点的识别，或影响体内TMV粒体的脱衣壳或TMV-CP亚基的体内聚合。

Second, procedures of effective protoplasts fusion and U.V. irradiation or heat treatment protoplasts fusion were developed. Equal protoplast suspensions (containing about 108/ml protoplasts) of each strain were mixed and washed by centrifugation, then the pellets were resuspended in PEG4000 solution (35%) at 37癈 for 2min.

其次，确定了原生质体融合的基本条件及灭活原生质体融合的条件：等量混合两亲株原生质体或用热灭活的原生质体(＞10~8个／ml)，用35％的PEG4000在37℃处理2min后，稀释，涂布再生，可获得融合率在50％左右的融合子。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。