等浓度

The effects of different concentrations of Pb2+(0, 5,10,15, 20, 50, 80 mg/ L) Pistia stratiotes, activities of protective enzyme SOD, NRA ,CAT, POD in roots and epicotyls of maize seedlings were studied.

中文摘要：研究了不同浓度( 0，5，10，15，20，50，80mg/L)Pb2+胁迫对大薸超氧化物歧化酶、硝酸还原酶、过氧化物酶、过氧化氢酶等保护酶活性的影响。

In bud stage of mustards ecotype Xuelihong and Yuanyejie were transformed with in planta vacuum infiltration by an Agrobacterium tumefaciens strain GV3101 carrying hy-gromycin resistance gene. Effects of different factors on transformation frequency with in planta vacuum infiltration were studied.

以蕾期的芥菜生态型雪里蕻和圆叶芥为试材，在携带潮霉素磷酸转移酶标记基因的根癌农杆菌菌株GV3101的介导下，对影响芥菜植株原位真空渗入遗传转化效果的真空渗入时间、根癌农杆菌悬浮孢子的浓度、渗入培养基、感染方式以及根癌农杆菌菌株等进行研究。

Treating with different concentration of PEG 6000 in 1/2 Hoagland nutrient solution for 3 days, the physiological indexes , such as, Pn, chlorophyll fluorescence parameters, cell membrane permeability, MDA and relative water contents of Plantago asiatica L. and Viola philippcia Cay, were studied. The Pn of P. asiatica and V.

在不同浓度的PEG6000的1/2Hoagland营养液水分胁迫条件下，对处理3d的车前和紫花地丁的净光合速率、叶绿素荧光参数、细胞电解质外渗率、相对含水量和丙二醛含量等指标进行了测定和分析。

Plasma ignite for engine is a new pattern of portfire which has a especially discharge characteristic and highly discharge energy to increase the reliability of retrofires and extend the concentration limit of retrofires.

而等离子点火器作为现代燃气轮机的一种新型点火设备，具有独特的放电特性和较大的放电能量，能量集中，且可使发动机的点火可靠性和点火浓度极限得到极大提高等特点，正被各国科学人士研究和推广。

Factors that influence percentage of transformation including time of preculture, dipping and coculture, type and content of antibiotic, day of delayed selection culture, intension of selection were studied. The effective transformation system of "Starkrimson" was developed as follow: Leaves precultured in darkness for three days were dipped into agrobacterium suspension for three minutes, then were cocultured in darkness on MS medium with TDZ0.5mg/L and NAA 0.3mg/L for three days, and then cultured in darkness on MS medium with TDZ0.5mg/L NAA0.3mg/L and Cef 250mg/L.

通过对叶片预培养时间、侵染时间、共培养时间、抑菌素种类和浓度、延时筛选时间、不同选择压等遗传转化影响因素的研究，建立的'新红星'苹果遗传转化体系为：叶片黑暗预培养3天，经农杆菌侵染3分钟，在含TDZ0.5mg/L，NAA0.3mg/L的MS培养基上黑暗共培养3天，然后加250mg/L Cef黑暗维持培养3天，再进行Km12.5mg/L的选择压黑暗培养至抗性愈伤出现；转为光照条件1-2次的继代筛选，获得抗性芽后，进行扩繁。

In the preformulation study, the HPLC method for the analysis of RSP was established firstly and RSP solubility in various vesicles such as water, 20%PEG400, series of ethanol and propylene glycol was determined.

在制剂开发的处方前研究工作中，首先建立了利培酮HPLC分析方法，测定了药物在生理盐水、20%PEG400、各系列浓度的乙醇、丙二醇等溶媒中的溶解度。

In this thesis, the advantages and disadvantages of potentiodynamic polarization curve, electrochemical impedance spectroscope and coulostatic method for studying corrosion inhibitors in acidic mediums were compared. And then the effect of three popular acid corrosion inhibitors such as thiourea, dodecylamine and propargyl alcohol on the corrosion inhibition behaviors of Q235 steel in acidic solutions were investigated by these techniques. The anodic desorption behavior and extreme value phenomenon of concentration were surveyed thoroughly as well.

本文讨论了动电位极化曲线、电化学阻抗谱和恒电量测量方法在酸性介质缓蚀剂研究中的优势和不足，在此基础上，研究了硫脲、十二胺和丙炔醇等三种常见酸性介质缓蚀剂对Q235钢在酸性溶液中的缓蚀行为和机理，并深入探讨了缓蚀剂的阳极脱附和浓度极值现象。

The results show that ordered phases precipitated and formed a pseudobinary system; precipitated earlier than g phase by a congruent ordering + spinodal decomposition mechanism and thus produced a nonstoicheometric ordered phase, then the nonstoicheometric g phase precipitated by a non--classical nucleation and growth mechanism at the boundaries of phases, meanwhile, both of them transformed to stoicheometric ordered phases.

研究发现该合金沉淀过程中，析出D022结构的(Ni3V)相和L12结构的Ni3Al相，二者构成伪二元系；相先于相析出，相的沉淀机制为等成分有序化+失稳分解，相在相的相界处非经典形核，二者均先形成非化学计量比有序相，之后向化学计量比有序相转变；随Al浓度增加，相析出变慢，所占比例减少，而相反之，析出越来越早且所占比例增加。

The preparation of three different shapes a-Fe2O3 nano-particles by means of force hydrolyzation was discussed in this paper. By controlling the experimental conditions (Fe3+ concentration, acidity, reaction time, reaction temperature etc.), the particles with different shapes (ellipsoidal, pseudocubic, sphere) were obtained.

本论文采用强迫水解法制备了三种不同形貌的α-Fe_2O_3水溶胶，通过对反应条件Fe~(3+浓度、酸度、反应温度、反应时间等的控制获得了不同形貌(椭球形、球形、准立方体形)和粒径的α-Fe_2O_3，并利用浸渍—提拉法制备了α-Fe_2O_3纳米粒子薄膜。

By comparison among concentration of nitrogen compounds, relative contents of pryyolic N-H shielded carbazoles and parameters of C21-/C22+、Pr/nC17 , the results show that slight biodegradation has little effects on the relative contents and distribution of pyrrolic nitrogen compounds, but has certain effect on its concentration.

根据2类原油中含氮化合物浓度、屏蔽型含氮化合物的相对含量与反晕原油生物降解的地化参数C21-/C22+、Pr/nC17等指标的对比研究，发现生物降解作用对该区原油中含氮化合物的相对含量及其分布影响不显，运移作用仍然是造成含氮化合物分馏的主要因素。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！