查询词典 F.

In this paper, 1554 strains of bacteria were isolated from the soybean rhizophere in the different continuous systems. Those biocontrol bacteria were screened in vitro and in vivo. 6 strains of them had the better control efficacy. They exhibited the different antagonism to the pathogens of soybean root in vitro. The strains 18BR2-2 and 18BR9-1 showed a wide range of antagonism against Fusarium oxysporum, F. avenaoeum, F. solani and Rhizoctonia solani in vitro. The 6 strains exhibited different control efficacy to soybean root rot in greenhouse and in field. In greenhouse, they could decrease the degree of soybean disease significantly, and the control efficacy of 18BR2-2 was the best and can reach 45.90%. In theory, soybean treated by 18BR2-2 may postpone the days of outbreaking of disease for 6 days. The strain 18BR2-2 also promoted the growth of soybean seedling and, raising the soybean height for 11.24%, increasing dry weight for 40.91% and fresh weight for 35.27%.

本研究从长期连作田种植的大豆及其根际土壤中分离细菌1554株，采用平板测试、温室盆栽及田间试验等方法，筛选了对大豆根腐病菌(主要是尖孢镰孢菌Fusarium oxysporum)有很好作用效果的生防细菌6株，在离体的条件下均表现出不同程度的拮抗作用，其中生防细菌18BR2-2和18BR9-1表现出很广的杀菌谱，对大豆根腐病菌尖孢镰孢菌(F.oxysporum)、燕麦镰孢菌(F.avenaoeum)、茄腐镰孢菌和立枯丝核菌都有很好的离体拮抗作用，并且这6株生防细菌在盆栽和田间的情况下均表现出对大豆根腐病一定的防治效果。

The possible reason is that doped Zr〓 ion enters the interstitial sites for its small ionic radius and no dipole complexes were formed. Monovalent ion F��� has been reported to improve the scintillating performance greatly. Our results show that Agrand diagrams of F���: PWO crystals obey an modified Cole-Cole equation. The crystals present similar dielectric relaxation phenomena to but have much higher activation energy than that of RE〓: PWO crystals, which originate from the 〓 dipole complexes. The co-doping of trivalent Y〓 and pentavalent ion Nb〓 does not always show a better scintillation performance than that of solely doped samples, which could be attributed to the existence of the 〓 dipole complexes, which counteract the solely doping effect.

而Zr〓由于离子半径太小，可能进入间隙位置，不形成类似的偶极缺陷；一价负离子F〓的掺入提高了晶体闪烁性能，阻抗谱测试结果表明F〓：PWO晶体Argand图符合修正的Cole—Cole方程，晶体同样表现出介电弛豫现象，并具有比RE〓：PWO晶体中高得多的弛豫激活能，可能起源于形成的〓偶极缺陷；Y〓和Nb〓双掺的PWO晶体并没有显示出两种离子单掺优点的叠加，阻抗谱测量结果表明，在双掺晶体中可能形成〓偶极缺陷，使两者掺杂作用相互抵消。

In 1959 Sauerbrey developed an empirical equation to describe the mass sensitivity of gas phase mass deposition on a piezoelectric quartz crystal——Sauerbrey equation:ΔF=〓=-CΔm, where ΔF is measured frequency shift, in Hz; F��� is the fundamental resonant frequency, in Hz;Δm is mass change, in g; A is piezoelectrically active area , in cm〓;μ〓 is shear modulus of quartz, 2. 947×10〓g· cm〓;ρ〓 is density of quartz, 2. 648g·cm〓; C is mass sensitivity constant , in 〓.

1959年，Sauerbrey最先提出了将压电晶体谐振器用作定量测量质量的装置，并从理论上导出了频率与质量变化之间的关系式——Sauerbrey方程：ΔF=〓=-。。。

The amount of radiopacity promoted by rDBM/f and rhFGF-1/f at 8 weeks was equivalent and was greater than antecedent times.

在8个星期rDBM/f和rhFGF-1/f促进了的防辐射的数量是等价物并且是伟大的与比先行的时间。

Compared to previous approaches on the same MEDLINE abstracts, the presented resolution was promising for its 92% F-Score in pronominal anaphora and 78% F-Score in sortal anaphora.

与其它方法在相同语料做比较，所提的方法处理指代词指代现象可达到92% F-Scorec和名词指代现象可达到78% F-Score。

METHODS: Rat mesenchymal stem cells at passage 3 were obtained under sterile condition, and divided into groups A-F. In group A, iodine ion was not added. In groups B-F, iodine ion at mass concentrations of 2, 55, 90, 125 and 2 500 mg/L was added respectively. An additional blank control group was established, and simultaneously the cells were induced into neuron-like cells with dimethyl sulphoxide.

无菌条件下取大鼠第3代间充质干细胞，分为A~F组：A组不加碘离子，B~F组中分别加入质量浓度为2，55，90，125和2 500 mg/L的碘离子，另设空白对照组，同时加化学诱导剂二甲基亚砜向神经元方向诱导分化。

The results indicated as pH values in the range from 4.50 to 7.50, the volume and dry weight of root increased as pH values increased, as well as AAAR,TAAR. The relationship of nicotine and total nitrogen accumulation with pH values was parabola,the functions were Y=-61.429X2+391.17X-162.8 (F=l 8.45), Y=-24.3X2+154.88X+52.7 (F=14.40**) respectively. When pH value got rise to 7.50, the accumulation of nicotine and total nitrogen attained the highest .

主要研究结果如下： 1 不同pH值(4.50、5.50、6.50、7.50、8.50)对烤烟根系发育、根系吸收面积以及对烟叶烟碱、总氮、蛋白质和多酚物质积累影响的研究结果表明pH值在4.50～7.50范围内，根系体积和干重都随着pH值上升而增加，AAAR、TAAR也随着升高，烟叶中烟碱、总氮累积量随着pH值上升而增加，烟碱和总氮累积量与pH之间呈抛物线关系，关系式分别为Y=-61.429X~2+391.17X-162.8，F=18.45~；Y=-24.3X~2+154.88X+52.7，F=14.40~，pH值对烟碱和总氮累积量的影响存在极显著差异，当pH值升至7.50时，烟碱和总氮累积量达到最高值。

Based on the knowledge of real f -algebra, the important properties of semi and unital complex f -algebra are studied.

以实f-代数的理论作为基础，主要讨论了半素和有单位元的复f-代数的重要性质。

This time, the weighted F-value is 4.898, unweighted F-value is 2.957, that shows the weighted gap between class are more obvious that unweighted one, that is, the accuracy of the clustering algorithm is significantly higher than unweighted fuzzy clustering algorithm.

此时，加权的F值为4.898，未加权的F值为2.957，说明加权的类间的差距比未加权的明显，即该算法聚类准确率要明显高于未加权的模糊聚类算法。

Given the definition, the statement "water is the waterish stuff" is contingent, but a priori, since if we replace "water" with its definition in this statement, the result will have the form the actual F = the F .

给定定义，陈述&水是这些水性材料&是偶然的，但先天的，因为如果在这个陈述中用&水&的定义取代&水&，结果就会是&这些现实F＝这些F&。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。