الفهرس 
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Abstract
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4 - SU:.:M/\ RY
j poly s2ccharic e wa s isolated from ”(:;ype rUB e s cul en tu s” )-3.2 % yiela, and was purifie; via its copper complex. ~sis of the polysBcchari~e afforded D-glucose,D-mannose ~tose anf ~-glucuronic acid in the ~olar rRtio.
:1:1 respectively.
horn the results of methylation and partial acid
,sis showed that the acidic polysaccharide has a
icate i highly branche Ii struc ture in mole.r pro;)Ort ions 1.5:1:1 of the above sacchariies, consisting mainly
1~3) ana (1~4)-D-glycosidic linkages. The b~ck-
:hain containing D-glucose, D-mannose and D-glucuronic ~si~ues are attachei at the C-l, C-4 ani C-3 in some units, with side chains of single or Q few carbohydraaites, which are terminate&. with D-gal&ctose and D-~aY’Jlose
:eriodate oxidation of the polymer resultee in the
ption of twelve molar equivalents of the oxiQant and 1beration of three molar equivalents of fomic acid ~enteen anhydroaldose unites the above sQcchari~es !ratio referred to above. After oxieation by periodate bsequent hydrolysis of the polyaldehydic pro~uct,
ose, D-mannose and D-glucuronic acid th8t hQ~ ~3c8ped ’ion were observed to occur in the hyciroly3ate, thus
culsr w~iEht of th~ polymer was carri~1. out by treattwith sodium borohydri~e follow~. by oxirlation by ~riodate 2n~ subsequent esti~2tion of the formal~ehyd~ had been liberate; by th~ oxidation.
I
lkki (ce.-88. 2°) Qn~ in cuprammani urn (ca-182°) 1ni ica t ed
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a containing the polymer ere not engagee. Th~ highly
T
:ive (C<)D valu~s (-88.2° QnQ -122.6° respectively)
he unme thyla tea ana me thyla tei . poly seccher iie, strongly Jte~ that the glycosiiic bonds were prel.ominantly of the ype, ani the absorption spectrum of th~ polysaccharide
i that the linkages between the units were of the p-type. nclusion, a tentative formulation of the polysQccharid~ ffered. It is suggestei that the ”Cyperus esculentus ” ~s an Qcijic polysaccheriie composej of a main straight of D-glucopyranos~, D-mannopyranose ani D-glucuronopy-
lresieues ar~ join~d by P-(1~4)-linkage an. th~ ing units from D-glucuronic acii and D-mannose
opyranose units, ar~ join~d to th~ rr.sin chain at every ~ucopyrRnose or/ani D-ffignnopyranose residue. The
tion to the latter residues !ire throu8:h C-l and C-3 of mits. Ter~in&l units in branches are D-gnlactopyranose 1i D-ffiannopyranose uni ts ( seexxv )