Submitted on: 30 December 2013.
Revised on: 26 April 2014.
Accepted on: 03 June 2014.
___________________Carbohydrate Research---ELSEVIER SCI LTD
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Submitted on: 26 December 2015.
Revised on: 17 January 2016.
Accepted on: 18 February 2016.
___________________Carbohydrate Research---ELSEVIER SCI LTD
Submitted on: 17 August 1998.
Revised on: 13 October 1998.
Accepted on: 08 December 1998.
___________________Carbohydrate Research---ELSEVIER SCI LTD
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