• Volume 15, Issue 2

      February 1942,   pages  75-131

    • New concepts of the solid state

      C V Raman

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      The postulates on which the Debye theory of the specific heat of solids and the Born crystal dynamics are respectively based have been critically examined and shown to be theoretically untenable. Since a crystal is a three-dimensionally periodic grouping of similar oscillators coupled together, it follows that the modes of vibrations possible would be also space-periodic, the geometric modes being determined by the characters of the atomic space-grouping in the crystal. They would further form a finite and enumerable set of monochromatic frequencies. The spectroscopic, X-ray and thermal behaviours of a crystal would on these views be radically different from those consequent on the Debye and Born theories. The experimental facts are found to contradict the conclusions of these theories and on the other hand, to be in full accord with the new concepts.

    • A contribution to the life-history ofVahlia viscosa, Roxb., andVahlia oldenlandioides, Roxb

      T S Raghavan V K Srinivasan

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      The haploid chromosome number ofVahlia oldenlandioides has been confirmed to be 6, and that ofV. viscosa has been determined to be 9.

      The origin and development of the microsporangium, the embryo-sac, the endosperm and the embryo is described in detail; bothVahlia viscosa andV. oldenlandioides are found to be quite similar.

      In both the species ofVahlia investigated, the endosperm is cellular and there are four uninucleate chalazal endosperm haustorial cells in both.

      No relationship could be established between the divison of the family on the basis of the type of endosperm development with (i) division of the family by taxonomists on morphological grounds and (ii) the chromosome numbers known in the family.

      For a cytotaxonomical approach, cytological details like secondary association, etc., of which no information is now available, are suggested to be a necessary prerequisite.

      The role of the integumentary tapetum is discussed in the light of its correlation to the nucellus and the endosperm.

    • Trypsin-kinase in blood

      N K Iyengar

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      A clear picture of the proteolytic system existing in blood has been presented.

      The possibility of the presence of a trypsin-kinase in blood has been discussed.

      The red blood cells and the platelets have been examined for the presence of trypsin-kinase.

      Red blood cells do not contain the kinase.

      The experiments reported in this paper strongly suggest the presence of trypsin-kinase in platelets, which is capable of liberating the trypsin from the inhibitor compound present in acetone precipitated plasma proteins.

    • Anti tryptic components of blood

      N K Iyengar

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    • Prothrombin and plasma trypsin

      N K Iyengar

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