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Magnetic anisotropy of naturally occurring substances

III. Wood and its constituents

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Proceedings of the Indian Academy of Sciences - Section A Aims and scope Submit manuscript

Summary

The diamagnetic anisotropy and absolute susceptibilities of wood, lignin and wood cellulose have been determined. It has been found that the ‘crystalline’ element in wood is definitely cellulose and that lignin and the hemi-celluloses make no contribution to the magnetic anisotropy, suggesting either a random orientation if they are crystalline or an amorphous structure. In the light of evidence from other sources, it seems most likely that they are amorphous. The anisotropy measurements also indicate that the direction of maximum diamagnetic susceptibility in the cellulose molecule is along the length of the chain. Since it is also known that the direction of maximum electric polarisability too is along the chain length, we find that these directions coincide in the molecule just as in the case of the higher long-chain saturated hydrocarbons.

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References

  1. P. Nilakantan,Proc. Ind. Acad. Sci., 1935,2A, 621; 1936,4A, 542.

    Google Scholar 

  2. A. W. Schorger,Chemistry of Cellulose and Wood, McGraw Hill Publishing Co., Ltd., 1926; Hawley and Wise,The Chemical Catalogue Co., 1926.

  3. P. Nilakantan,Proc. Ind. Acad. Sci., 1937,5A, 166.

    Google Scholar 

  4. K. H. Meyer and H. Mark,Der Aufbau der Hochpolymeren Oraganischen Naturstoffe, Leizig, 1930; H. Mark and F. Schossberger,Ergeb. d. Exact. Naturwiss., 1937,16, 226; E. Sauter,Zeit. f. Phys. Chem., 1937,B35, 18–128.

  5. H. Staudinger,Die Zellstoff Faser, 1936, 1, Nr. 11/12.

    Google Scholar 

  6. A. Frey-Wyssling,Protoplasma, 1936,25, 261; E. Sauter,loc. cit. Zeit. f. Phys. Chem., 1937,B35, 18–128; O. Kratky and H. Mark,Zeit. f. Phys. Chem., 1935,B36, 129.

    Article  Google Scholar 

  7. Reinhardt Theissen,Ind. Eng. Chem., 1932,24, 1034; W. K. Farr,Jour. Appl. Phy., 1937,8, 230–31.

    Google Scholar 

  8. K. Freudenberg and W. Dürr,Handbuch d. Pflanzenanalyse, 3, Part II, 125 (Julius Springer, 1932).

    Google Scholar 

  9. H. Pringsheim and D. Krüger,ibid..

    Google Scholar 

  10. W. H. Dore,Ind. Eng. Chem., 1920,12, 264.

    Article  Google Scholar 

  11. A. W. Schoger,loc. cit. Chemistry of Cellulose and Wood, McGraw Hill Publishing Co., Ltd., 1926, p. 540.

  12. A. W. Schorger,ibid., Chemistry of Cellulose and Wood, McGraw Hill Publishing Co., Ltd., 1926, p. 524.

  13. P. Nilakantan,Proc. Ind. Acad. Sci., 1936,4A, 542.

    Google Scholar 

  14. —,ibid.,, 1937,5A, 171.

    Google Scholar 

  15. A. Frey,Ambronn-Festschrift Kolloid Chem. Beih., 1927,23, 40; K. Kanamaru,Helv. Chim. Acta., 1934,17, 1047.

    Article  Google Scholar 

  16. M. Ramanadham,Ind. Jour. Phys., 1929–30,4, 15; M. Scherer,Comptes Rendus, 1931,192, 1223.

    Google Scholar 

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Science, Bangalore

    P. Nilakantan

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  1. P. Nilakantan
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(Communicated by Sir C. V. Raman, Kt., F.R.S., N.L.)

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Nilakantan, P. Magnetic anisotropy of naturally occurring substances. Proc. Indian Acad. Sci. (Math. Sci.) 7, 38–49 (1938). https://doi.org/10.1007/BF03045379

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  • DOI: https://doi.org/10.1007/BF03045379

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