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Anita Saxena ¹, H. B. Bohidar ¹

Affiliations
1 School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, IN

Abstract

Binding of the anionic surfactant, sodium dodecyl sulfate, SDS to gelatin chains in aqueous buffer (pH = 7.0) medium has been studied by dynamic light scattering technique at 30°C. In the surfactant concentration range varying from 0 to 100 mM, SDS exhibited electrostatic binding to the charged groups of the polypeptide chain resulting in considerable reduction in the hydrodynamic radius (R_h) of gelatin upto the critical aggregation concentration (CAC); at higher concentrations both the SDS micelles and gelatin-SDS complexes were found to coexist in equilibrium. The micellar shapes were found to be near-spherical for SDS. Results have been interpreted through the necklace-bead model of polymer-surfactant interactions.

Keywords

Gelatin-SDS Binding, Necklace-Bead Model, Micellisation.

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Anita Saxena ¹, Stanley J. Ulijasek ²

Affiliations
1 Department of Medical Genetics, 8 G Peri, Rae Barelly Road, Lucknow -14, IN
2 Department of Biological Anthropology, Downing Street, Cambridge University, CB2 3Dz, GB

Abstract

Patterns of food consumption are of interest to both nutritionists and anthropologiest. Intra-household food allocation follows norms which include assumptions about the quantity, type and quality of food to be given to men, women and children. At the simplest level, differential food allocation can be seen from the fact that in absolute terms most adults are given more to eat than small children". However, relative to recommended requirements, nutrient intake can vary enormously between age groups, with implications for nutritional health. In South Asian countries, women and children suffer relative to men because they rank low in distribution of nutrient rich foods.

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Anita Saxena ¹

Affiliations
1 Department of Biolgical Anthropology, New Museum Site Pembroke Street, University of Cambridge, Cambridge, CB2 3DZ, GB

Abstract

Food is the instrument of nourishment; nutrition is tlie act of using it. Diet and nutrition are not synonymous although they are popularly usea in that fashion. While diet consists of various articles of food which are ingested and converted for use in the body for building up and maintaining it in a vital condition, nutrition is the sum of the processes by which an organism is nourished by absorbing substances and assimilating them.

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Anita Saxena

Abstract

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Keywords

No Keywords.

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