The relation between electromagnetic and gravitational interactions

A new formulation of the electromagnetic interaction between charges is given using a relative interaction Lagrangian formalism. This leads to all the well-known effects in current electricity, but predicts, in addition, a variation of inertial mass with potential. In the analogous equations written for gravitation also, the inertial mass is changed by the potential energy. These equations are found to explain the gravitational phenomena usually explained by general relativity, namely, the precession of the Mercury perihelion, gravitational deflection of light and the red-shift. The agreement between theory and experimental observations is fair. The results are incorporated in Table I.     

An oxidimetric method for the determination of thiophanatemethyl in commercial formulations

A simple, accurate and reliable titrimetric method is described for the determination of thiophanate-methyl, an important commercial fungicide. The method is based on its direct titration at room temperature with ammonium hexanitratocerate(IV) in sulphuric acid medium in the presence of potassium iodate as catalyst. The method permits detection of the end-point visually, potentiometrically or spectrophotometrically. The proposed method is recommended for routine determination of the fungicide in its commercial formulations.     

Kinetics and mechanism of ketone-bisulfite addition reaction in aqueous solution

The kinetics of the addition of bisulfite to acetone has been studied by the polarographic technique. The specific rate increases with pH and hence the reaction is probably base catalyzed. Mechanisms have been suggested for the reaction in the presence and absence of added base.

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Use of harmonic oscillator potential in the analysis of muonic transition energies

Energy levels: 1s _1/2, 2p _1/2, 2p _3/2, 3d _3/2, and 3d _5/2 of the muon in the spherical nuclei:¹²⁰Sn,¹⁹⁷Au and²⁰⁸Pb have been calculated under the assumption of harmonic oscillator potential. The levels are corrected for vacuum polarisation. The agreement with experimental values is better than 0·5%. An accurate method of solving the Dirac equation to obtain the energy eigenvalues is outlined. The importance of choosing the ‘classical turning point’ as the radius for matching the interior and exterior solutions is discussed.     

Motion of a rigid plastic cantilever in a damping medium under transverse impact

The motion of a rigid plastic cantilever beam which is surrounded by a damping medium and struck transversely at the tip by a moving mass is studied. The elementary theory, which disregards effects due to rate of straining and geometry changes is used. The governing equations of motion are integrated numerically. For comparison the case of discrete damping provided at the tip only is also solved. Results are presented for a wide range of parameters.     

Coupled bending-bending vibrations of pretwisted tapered cantilever beams treated by the Reissner method

Theoretical natural frequencies and mode shapes of the first four coupled modes of a uniform pretwisted cantilever blade and the first five coupled flexural frequencies of pretwisted tapered blading are determined by using the Reissner method. The shape functions for the bending moments and deflections are developed in series form and with these used in the dynamic Reissner functional, the frequency equation is obtained by minimizing it through the Ritz process. A convergence study made in the case of the pretwisted uniform blade indicates that there appears to be a quicker convergence of the natural frequencies and that a five-term solution yields a set of results that are in good agreement with the theoretical and experimental values of other authors, available in the literature. The mode shapes obtained from the present analysis are compared with those from an earlier investigation and the effect of ignoring the shear deflection and rotary inertia in the analysis is discussed. The effects of breadth taper and depth taper on the vibration characteristics of pretwisted cantilever blading are discussed from the results obtained in the present limited study and it is observed that an extensive investigation appears to be necessary to draw positive conclusions covering wide ranges of pretwisted blade parameters.     

Peptides of azascrine

The synthesis of the cis and trans forms of the cyclic dipeptide of O-diazoacetyl-DL-serine is described.     

Resonance energy exchange effects in atmospheric transmission due to pollutants

It is shown that resonant energy exchange between two gases can alter the absorption of radiation by either, and that hydrocarbons present up to 100 ppm in the atmosphere as pollutants affect its absorption at 10.6 μ. This reduces the initial cooling time reported in the transmission of 10.6 μ laser beams in the atmosphere.