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The probe Tab 827 (5"-GCTTCCGCDYCCCACACCTA-3") detected all known representatives of the genus Thermoanaerobacter; the probe Tab_1 844 (5"-TTAACTACGGCACGRAATGCTTC-3") was specific for the first group of species of the genus (T.
      
thermohydrosulfuricus); the probe Tab_2 424 (5"-CACTAMYGGGGTTTACAACC-3") targeted the second group (T.
      
italicus); and the probe Tab_3 184 (5"-TCCTCCATCAGGATGCCCTA-3") was specific for the third group (T.
      
The temperature dependence of resistivity, ρ(T), and ac susceptibility of these samples reveal a superconducting transition of ZrB2 with Tc=5.5 K, while NbB2 and TaB2 have been observed to be nonsuperconducting up to 0.37K.
      
Band structure of ZrB2, VB2, NbB2, and TaB2 hexagonal diborides: Comparison with superconducting MgB2
      
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Here is discussed the application of differential gear mechanism for variable speed control, particularly for varying bobbin speed of flyer frames. For all three types as shown in Fig. 1, we get the same speed relationship as follows: n_z=bn_o+(1-b)n_y n_o-Constant speed of main shaft. n_y-Control speed from some speed-varying mechanism such as friction disk or belt cone. n_z-Output varying speed for some definite ends. b-Numerical constant dependent on gear ratios, given in Tab. 3 for all the three different...

Here is discussed the application of differential gear mechanism for variable speed control, particularly for varying bobbin speed of flyer frames. For all three types as shown in Fig. 1, we get the same speed relationship as follows: n_z=bn_o+(1-b)n_y n_o-Constant speed of main shaft. n_y-Control speed from some speed-varying mechanism such as friction disk or belt cone. n_z-Output varying speed for some definite ends. b-Numerical constant dependent on gear ratios, given in Tab. 3 for all the three different types. Straight lines are plotted as in Fig. 2 to show the above relationship for different values of b. In Fig. 3 is given the relationship of turning moments and turning speeds at different values of b. In Fig. 4 is given the directional relationship of the mechanical power trans. mitred in the differential gear mechanism. The conclusion is: When the required speed variation is within narrow limits, the use of differential mechanism can reduce the mechanical power transmitted by the speed-varying mechanism, thus increasing its sensitivity and accuracy of control. See equation (12).

本文讨论粗纱机差动机构中周转轮系的应用——变速控制。对于图1中三种类型的周转轮系,可以得出统一的转速关系式: n_z=bn_o+(1-b)n_y 在图2中根据上式按下同的b值作出各直线以表示其间的关系。在图3中按不同的b值作出转矩和转速之间的关系图。在图4中表示出在各种情况下周转轮系和变速装置间的功率路线图。根据(12)式我们可以得出这祥的结论:当所要求的变速范围不大时,采用了周转轮系可以使通过交速装置的功率大为减小,因而增加变速控制的灵活性和准确性。

In tab. 1 are given the deflection formulas of circular beams (with one end fixed) under concentrated load. In tab. 2 and 3 are given the deflection formulas of circular beam (with one end fixed) under the action of its own weight. In tab. 4 and 5 are given the deflection formulas of circular beam (with one end fixed) under the action of centrifugal inertia load during rotation. Proofs of fundamental equations are given in appendix. The formulas are directly used to calculate the deflection...

In tab. 1 are given the deflection formulas of circular beams (with one end fixed) under concentrated load. In tab. 2 and 3 are given the deflection formulas of circular beam (with one end fixed) under the action of its own weight. In tab. 4 and 5 are given the deflection formulas of circular beam (with one end fixed) under the action of centrifugal inertia load during rotation. Proofs of fundamental equations are given in appendix. The formulas are directly used to calculate the deflection of flyer leg in rotation. The formulas may also be applied to statically indeterminate problems such as the determination of the stresses in a card cylinder lying flat on ground.

表一中給出薄壁圓弧曲梁(一端固定)在受有集中载荷时的撓度公式。表二及表三給出薄壁圓弧曲梁(一端固定)在其本身重量作用下所产生的撓度公式。表四及表五給出薄壁圓弧曲梁(一端固定)当迴轉时在离心載荷作用下的撓度公式。在附录中給出了曲梁撓度方程式的証明。表中撓度公式可直接用来計算錠翼迴轉时臂端的撓度。表中撓度公式也可用来解决靜不定問題,如計算鋼絲車錫林擱置于地面时的应力。

In view of some analogues of chloramphenicol show more or less in vitro activity towards quite a few species of tumour cells,the authours have examined the in vitro anti-Ehrlich ascites activity of 5 compounds prepared by one of us and Par before,namely,α-dichloroacetamido- (or acetamido)-β-hydroxy-p-nitro-o-hyrdroxy-(or methoxy)-propiophenone(Ⅰ,Ⅱ,Ⅲ),and α-dichloro- acetamido-β-hydroxy-p-amino-o-hydroxy-propiophenone(IV, V).The results(see Tab. 1)showed that the compounds carrying a nitro group in the...

In view of some analogues of chloramphenicol show more or less in vitro activity towards quite a few species of tumour cells,the authours have examined the in vitro anti-Ehrlich ascites activity of 5 compounds prepared by one of us and Par before,namely,α-dichloroacetamido- (or acetamido)-β-hydroxy-p-nitro-o-hyrdroxy-(or methoxy)-propiophenone(Ⅰ,Ⅱ,Ⅲ),and α-dichloro- acetamido-β-hydroxy-p-amino-o-hydroxy-propiophenone(IV, V).The results(see Tab. 1)showed that the compounds carrying a nitro group in the benzene ring possessed invariably higher activity as compared with their corresponding amino analogues.Therefore,it appears that the nitro group attached to benzene ring plays somewhat important role in producing the in vitro anti-Ehrlich ascites activity. These facts led us to prepare some arylaliphatic nitroalcohols(Ⅶ,Ⅸ,Ⅹ,Ⅺ)and some derivatives of β-nitrostyrenes (Ⅻ, ⅩⅣ,ⅩⅤ,ⅩⅥ,ⅩⅦ,ⅩⅧ,ⅩⅨ,ⅩⅩ) for the purpose of examining their anti-Ehrlich ascites activity.The results(see Tab.2)showed that the nitro group attached to saturated aliphatic carbon atom has no obvious influence in enhancing the anti-tumour activity,in some cases even with counter effect,but that which attached to unsaturated aliphatic carbon atom,as in the case of a series of β-nitrostyrene derivatives,did show higher activity.Therefore, the phenomenon is in harmony with the result described for I,II in the foregoing paragraph,that is,nitro group attached to unsaturated carbon atom is equivalent to that attached to benzene ring. 1-Phenyl-4-nitrobutadiene(ⅩⅥ),in which the nitro group being in the vinylogous position of β-nitrostyrene,also possessed considerable activity.The groups,except that with greater molar volume,substituted in'the benzene nucleus of β-nitrostyrene appear to have no significant influ- ence. The m.ps.of the compounds prepared are recorded in Tab.2.

1.試驗了α-二氯乙酰胺(或乙酰胺基)-β-羥基-对-硝基-邻羥基(或甲氧基)苯丙酮及其相当的氨基化合物的体外抗艾氏腹水瘤細胞的作用,表示硝基对产生活力有影响。2.合成了若干芳香脂肪硝基化合物及β-硝基苯乙烯类化合物,并試驗了該項化合物的体外抗艾氏腹水瘤細胞的活力。3.从活力与化学結构的关系看,脂肪族飽和碳原子上的硝基对产生抗瘤細胞活力无影响,而硝基連在不飽和碳原子上时对活力的增強有很大关系。故一系列的β-硝基苯乙烯类化合物均有相当好的抗肿瘤細胞作用。至于苯乙烯环上的取代基則关系不大,除非取代的基团体积較大,活力也减小。

 
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