274 results
Search Results
Now showing 1 - 10 of 274
PublicationArticle Die Bestimmung der Zsigmondy'schen Goldzahl, Schaumzahl und Oberflächenspannung von Natron- und Kalisalzen verschiedener gesättigter und ungesättigter Fettsäuren(Springer-Verlag, 1936) N.N. Godbole; Sadgopal[No abstract available]PublicationArticle PublicationNote PublicationLetter Ring deposits on glass by positive ray bombardment [3](1935) B. Dasannacharya; V.T. Chiplonkar; L.G. Sapre[No abstract available]PublicationArticle Tönende Elgenschaften von Gelen - 1.Teil. Die Schallgeschwindigkeit in Stäben von Kieselsäuregel(Springer-Verlag, 1923) Mata Prasad[No abstract available]PublicationLetter Light-effect in chlorine under electrical discharge: Change of the wave form due to irradiation [5](1944) S.S. Joshi[No abstract available]PublicationArticle The scalar invariants of a general gravitational metric(1949) V.V. Narlikar; K.R. KarmarkarA set of fourteen independent scalar invariants of the second order, associated with a general four-dimensional Riemannian metric, is obtained. The set is found to reduce only to four independent invariants in the case of a general spherically symmetrical line-element. Moreover it is shown that the necessary and sufficient conditions that a general spherically symmetrical line-element may represent (i) a flat space, (ii) a Riemannian space of constant curvature, (iii) a Riemannian space conformal to a flat space, (iv) a Riemannian space of class one, can be expressed in terms of these invariants. A new line-element which is the first of its kind known to us is also given, representing the gravitational field due to radiation flowing in one direction and for which all the scalar invariants of the second order vanish. © 1949 Indian Academy of Sciences.PublicationArticle Wall influence in the production of the joshi effect in chlorine under silent electric discharge(1949) B.M. ShuklaThe Joshi effect (∓Δi) in 170 mm. chlorine has been studied in a modified Siemens tube in which the ionization space could be filled with and emptied of powdered glass, the discharge being "wall influenced" and "normal," respectively. With both of these, due to 8-14 kv. of 50 cycles frequency, in the dark and in light, current i was observed in the aerial and the low-tension lines. A vacuum junction, a diode, and a triode were used as current indicators. In "normal" discharge ohmic resistance R reduces -per cent Δi = 100Δi/iD, owing to suppression of high frequencies, in which -Δi predominates, -per cent Δi in iaerial > in iL.T.. Under "wall" discharge an inversion -Δi ⇌ + Δi occurs at 9.2 kv. and 11 kv. in iL.T., and only at 9.2 kv. in iaerial. The inversion is entirely potential-reversible. Serial R and by-pass capacity C reduce (numerically) -per cent Δi at low potential. At large potential, where +Δi occurs, both these parameters produce a marked -per cent Δi. It is suggested that the positive effect occurs in super high frequencies, simultaneously with negative effect (the latter being associated with moderate high frequencies). With -per cent Δi produced at large potential with a serial R, a capacity parallel to R, providing an alternative path to the super high frequencies suppressed by R, should restore the positive effect. This has been observed. The generality of these results is in accord with Joshi's theory of the surface origin of this phenomenon.PublicationArticle A note on the determination of sex of plantain flowers(1939) A.C. JoshiThe sex of the flowers of plantain depends upon the amount of nourishment available. When there is plenty of nourishment, female flowers and fruits are formed. When the plants are exhausted and only a small amount of nourishment is available for the growing flowers, the latter differentiate as male flowers. © 1939, Indian Academy of Sciences. All rights reserved.PublicationArticle