• Volume 46, Issue 1

      July 1957,   pages  1-74

    • Oceanographic studies in the Bay of Bengal

      E C LaFond

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      The preceding review points out the progress that is being made in studies at Andhra University. It reveals that the secrets of the sea are many and varied.

      It is probably apparent from these studies that an interrelation exists between the various fields of oceanography. For example, it is not possible to discuss plankton population or beach erosion without reference to currents and waves. All are interrelated. Consequently, the solution of the many unsolved problems must be a cooperating-team approach, whereby experts in one field work jointly with experts in another. This has been accomplished at Andhra University, as evidenced by the progress made on the many problems.

      This summary also points out how interesting and thought-provoking the problems of the sea can be. The Bay of Bengal is literally a gold mine of intriguing problems for an unlimited number of future students in oceanography.

    • Ionic changes in unstriated muscle immersed in sodium-free solutions

      Inderjit Singh A K Acharya

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      1. Frog’s stomach muscle responds when immersed in hypotonic sucrose solution. The more thoroughly, sodium is eliminated from the external medium, the better it responds.

      2. After the muscle has acclimatised to sucrose solution, re-immersion in solution of sodium chloride, or sodium chloride containing a little calcium or potassium abolishes the spontaneous contractions.

      3. The sodium and potassium concentration in the muscle after immersion in sucrose for 4 hours becomes 0·0018 m.Eq. and 0·03 m.Eq. respectively per ml. of water in the muscle.

      4. The mechanical response of the muscle in sucrose solution varies as the intracellular potassium.

      5. These experiments suggest that intracellular potassium, and not extracellular sodium, that is mainly responsible for excitability of the muscle.

    • Electron microscopy and algology

      T V Desikachary

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      Since 1936, when the first alga was investigated with the help of the Electron Microscope more and more algæ have been studied. These studies have greatly contributed to our knowledge of the submicroscopic morphology of algæ. A review of the most important aspects of these investigations is given in this paper.

      The utilization of the results of these Electron Microscopic investigations in taxonomy is discussed.

    • Translocation of griseofulvin in rice seedlings (Oryza sativa L.)

      N S Subba-Rao

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      A chromatographic method of detection of griseofulvin in guttation drops of rice seedlings (Oryza sativa L.) has been described. This technique has demonstrated that seven-day old seedlings translocate the antibiotic from the roots to the leaves in twelve hours.

    • Embryological studies in compositæ - III.Gerbera jamesonii Bolus

      H Maheswari Devi

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