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Morphological conversion from spiralto coccoid forms occurred when HP was cultured with selenium and most of coccoid forms had fragmentary flagella and pilus; the effection of selenium to activity of urease, catalase, alkaline phosphatase is not exist or not evidence; selenium enable pET32a-vacA-E.coli BL21 which can express VacA produce yellow lipochrome, and the color become deeper with increasing of concentration of selenium; selenium can decrease expression of recombined VacA by restrain the growth of pET32a-vacA-E.coli,but can not influence activity and gene sequence of VacA; selenium can enhance the suppression effect of recombined VacA for gastric cancer cell, depress the index of cell multiplication and the forming rate of colony, decrease the number of cell in S period, increase total of cell in G period; After purified, the recombined VacA can be identified by VacA antibody.

体外实验结果表明:一定浓度的硒作用HP后,HP菌落数量随着硒浓度的增加而减少,菌落颜色由灰白色变为砖红色,溶血现象随硒浓度的增加和作用时间的延长而逐渐消失,HP的形态由弯曲形变为球形或椭圆形,鞭毛及菌毛出现脱落现象;硒对尿素酶、过氧化氢酶、碱性磷酸酶活性无影响或影响不明显;一定浓度的硒能使表达VacA的pET32a-vacA-E.coli BL21工程菌产生脂溶性砖红色色素,颜色随硒浓度增加而加深;一定浓度的硒通过抑制pET32a-vacA-E.coli BL21工程菌的生长,减少重组VacA表达量,但不影响其空泡毒活性及编码基因序列;纯化后的VacA重组蛋白可被VacA抗体识别,具有良好的抗原性。

The Periscope Drawtube will be bent because of the water resistance in sailing and this bend will cause the error of star measurement. Due to its especial structure, contactless measurement is the only way to measure its bend degree. First this paper introduces the method by linear array CCD based on structure and light path; Second it expatiates linear array CCD work principle and driving scheduling with example of TCD1501C and the driving circuit by CPLD. The output signal of linear array CCD includes common disturbance so the differential amplifier is needed. In order to make the signal adapt to computer processing, a threshold circuit with Schmitt characteristic and the data process following threshold are given. At last, some key problems in application are given.

潜艇潜望镜的镜筒在航行时受到水的阻力会产生弯曲变形,这种变形会造成潜艇对星体测量的误差;由于镜筒结构的特殊性,对其弯曲程度的测量只能采用非接触方法;首先从结构和光路方面介绍采用线阵CCD作为检测元件实现对镜筒弯曲程度的测量;其次以东芝公司的线阵CCD(TCD1501C)为例阐述了其工作原理及驱动时序的控制要点,并介绍了基于可编程逻辑器件的线阵CCD的驱动电路;线阵CCD输出的信号中含有共模干扰,必须采用差分放大器将其抑制;为将信号转化为适合计算机处理的数字信号,文中给出了有一定实用价值具有施密特特性的二值化处理电路及二值化后的数据处理过程;最后阐述了在实际使用中的一些关键问题。

Congregation obtained after chitosan k and a treatments showed more tightness than sediments obtained without chitosan treatment, sediments after chitosan b and c treatments were network in structure. Mixed systems of pectin, protein and polyphenol were applied for studying a simulated system of kiwifruit juice. It was shown that the aggregates of pectin molecules in pectin solution were dispersing tubular globules. Particles in mixed solution of pectin and bovine serum albumin had two states: one was circular in photo, the other contained single particle or aggregates of several particles. Pectin decreased the interaction between protein and polyphenol and strengthened the stability of mixed solution of pectin, protein and polyphenol. Chitosan flocculated mixed solution of pectin, protein and polyphenol, and the floccule was white, having a network structure.

用果胶-蛋白质-丹宁酸混合体系作为猕猴桃原果汁的模拟体系研究结果表明:1、果胶溶液中果胶分子聚集物呈中空球形均匀分散;2、果胶/牛血清白蛋白混合溶液中的球形粒子有两种:粒子中央光线可透过,照片上呈环形;粒子的中央包含有单个或多个球形粒子的聚集体,认为粒子的中央是蛋白质,外层是果胶;3、果胶的存在抑制或减弱了蛋白质-丹宁酸之间的相互作用,果胶起到防止蛋白质-多酚产生沉淀的作用,增强了溶液的稳定性;4、壳聚糖加入果胶-蛋白质-丹宁酸混合溶液中时,可以絮凝果胶-蛋白质-丹宁酸混合溶液,溶液中出现白色的网状絮凝物。

Then in this disquisition by experiment of selectivity of pure Galenite and sphalerite, the rule is asscertained that the mine slurry pH and different adjust medicament and catch medicament and restrain medicament kinds and dosage affect flotation .

然后本研究通过对纯的方铅矿和闪锌矿物可选性的试验研究,确定了矿浆PH值、不同调整剂、抑制剂、捕收剂及活化剂的种类、混合配比和用量对浮选分离铅锌银矿石的影响规律,提出的适宜pH值范围、药剂种类及用量为实际矿石的铅锌分选和强化伴生银的回收奠定了良好的基础。

For the incompliant lending patterns mentioned above, on commercial banks part, improving the management and business technique will reduce, or even eliminate the incompliant behaviors in the pre-investigation process. From the Central bank and China Banking Regulatory Commission side, setting the inner network in the same industry, controlling the ratio of real estate loan, and enhancing the penalty to suppress the development of incompliant lending of real estate are effective ways to control risk. Fundamentally, the government should conduct the developer of real estate to search for the new financing mode to improve the stability and development, this might include some measures as follows: improving the liability financing structure of large real estate companies, develop the Reits and support its securitization to form the multi-financing.

对上述违规模式,从银行内部提高管理及业务水平方面,本文提出了针对性的风险防范措施,可有效地将违规的苗头扼杀在贷前调查过程中;从央行及银监会角度,可以通过建立同业信息沟通网络、严格控制房产信贷比重、加大违规惩戒力度等手段抑制房地产违规信贷的发展;而最根本的,政府应当引导房地产开发企业寻找新的融资渠道来促进房地产行业稳定和健康的发展,包括改善大型地产企业的债务融资结构、发展房地产投资信托基金及推动房产抵押证券化等方式形成房地产多元化融资的格局,这样,房地产违规信贷模式也就不攻自破了。

Results:Whith the time and doses of ART incubation extended, ART significantly inhibited the proliferation of SGC-7901 cells and the inhibited effect shows dose-and -time-dependent. Obvious changes of apoptotic morphology were observed by invert microscope, fluorescence microscope, scanning electron microscope and transmission electron microscope, they showed that cells had marked nuclear condensation or the fragmentation of chromation as well as apoptotic , mitochondrial edema and vesicle , with the time of incubation extended , the proliferation rate become slow and the volume became small and transformed. FCM assay indicated that most of the cells were arrested in Go/Gi and the apoptotic peak appeared. During the prolong of incubation time, the apoptosis rate was increased. At the same time, the number of S and G2/M phase cells were decreased. The result of TUNEL indicant that there are apoptosis and necrosis.

结果:随着药物浓度的增加和作用时间的延长,蒿甲醚对胃癌SGC-7901细胞的抑制作用呈时间和浓度依赖关系:在倒置显微镜、荧光显微镜、扫描电镜和透射电镜下可观察到典型的凋亡细胞的形态改变,表现为:核固缩或染色质边聚或凝聚成大块状,可见凋亡小体,线粒体肿胀增殖,严重的空泡化,随作用时间的延长,细胞增殖速度减慢,细胞体积缩小变形;流式细胞术显示胃癌SGC-7901细胞出现明显的凋亡峰,随着作用时间的延长,其凋亡率逐渐升高,细胞周期阻滞在G_0/G_1期,S及G_2/M期细胞数大量减少;流式细胞术TUNEL检测结果显示细胞凋亡和坏死同时存在。

Pot experiments were conducted to study the amelioration effect of meerschaum in Cd contaminated soil through artificial simulated pollution.

通过人工模拟污染、采用盆栽试验的方法,研究了海泡石对镉污染土壤的改良效果,试验结果表明:海泡石能显著促进空心菜的生长,抑制空心菜对镉的吸收,降低空心菜植株体内镉的浓度,同时,由于海泡石具有很大的表面积和较大的吸附量,可降低土壤镉的有效性。

The role of the reclaimed rubber: smoke sticky pine tar containing other renewable agent, during which small molecules can penetrate into uniform knot so that sulfur containing rubber between macromolecules to swelling, reticular structure of relaxation, an increase of molecular the distance between chain and oxygen penetration, the other can also serve as free radical acceptor, has inhibited the role of gelation, but also contribute to activating agent to the rubber matrix to speed up the regeneration process of proliferation and can enhance regeneration and plasticity of sticky glue and less polluting, process performance.

对再生胶的作用:粘稠的松焦油吸含其他的再生剂,其间的小分子能均匀渗透到含有结使硫的橡胶的大分子中间,使其溶胀,网状结构松驰,增加了分子链间的距离及氧的渗透,另外还可作为游离基的接受体,有抑制凝胶化的作用,还有助于活化剂向橡胶基质扩散加快再生过程,并能提高再生胶的粘性和可塑性,且污染较小,工艺性能好。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论,对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟,发现采用锥形谐振管可有效降低工质气体的速度振幅,进而减小在谐振管中声功率的损失;与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比,结果表明,在使用锥形管作为谐振管的热声发动机系统中,谐振管中的非线性效应得到了明显的抑制,热声发动机在基频模式下稳定运行,压比增大而加热温度降低。

Then, aerodynamic parameters in different flight conditions are used to imitate the uncertainty of the system, and the digital simulation of closed-loop system designed is performed. The results show that the system can accomplish asymptotic decoupling of roll angle, sideslip angle and head-on angle for aircraft, and the system is provided with the function for restraining uncertainty in the system. This illustrates that the flight control system designed has not only good decoupling characteristic, but also better robustness.

然后用不同飞行条件下的空气动力参数变化来模拟系统的不确定性,并进行闭环系统数字仿真,结果表明,所设计的控制律不仅可实现对飞机滚转角、侧滑角、迎角等的渐近解耦控制,而且对系统不确定性具有较强的抑制作用,说明系统具有较好的解耦性和较强的鲁棒性。

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。