Arbohydrates: D F S N U P , D , Q C , P D P: O 7, 2016 I ’ N: S B

CARBOHYDRATES E.P. MUNCAL

AND J.N.

GRAGEDA

EPARTMENT OF  F  OOD SCIENCE AND CIENCE  AND NUTRITION DEPARTMENT OF   F OOD NIVERSITY  OF THE THE PHILIPPINES, DILIMAN, QUEZON CITY , PHILIPPINES UNIVERSITY OF   ATE PERFORMED: OCTOBER 7, 2016 D ATE INSTRUCTOR’ S N AME: SHARINE BENDULO

Draw the the stru struct ctur ures es if the the 1. Draw sa! s a!" "es es #r$ #r$uc uce$ e$ i" the the e%#eri&e"t .

Osazone glucose

that

formed

Bene Benedi dict ct’s ’s reage eagent nt will will oxidize all reducing sugars that contain aldoses aldoses and ketose ketoses. s. On the other hand Barfoed’s reagent reagent will onl! oxidiz oxidize e monosaccharides. "nother di#erence is that Ben Benedic edict’ t’s s reag eagent ent is slig slight htl! l! alk alkalin aline e whil while e Barfoed’s reagent is slightl! acidic.

with

2. Ca" the the Se(iwa Se(iwa"0 "0-s -s test test 1e use$ t $i0ere"tiate sucrse fr& fructse3 /h)3 $o %ecause fructose fructose is a monosaccharide com& com&on onen entt of sucr sucros ose. e. Both Both car%oh car%oh!dr !drate ates s will will form h!drox!meth!lfurfural %ecause of the ketoh etohe exoses fou found in them. 4. Draw the h)$r()sis #r$ #r$uc uct5 t5s s f sucr sucrs se e a"$ a"$ starch. •

Osazone Fructose

that

formed

with

'. The There reti tica ca(( (() )* arra arra"+ "+e e the the f((w f((wi"+ i"+ su+ars su+ars accr$ accr$i"+ i"+ t their reacti,it) t Be"e$ict-s rea+e"t. Glucose> Maltose >Fructose>Sucrose>Star ch . /hat is the $i0ere"ce 1etwee" the Be"e$ict-s test a"$ Barfe$-s test. •

•

Sucrose '!drol!sis

•

car%oh!drate chain which tra&s iodine in %etween these structures therefore fastidiousl! decreasing the iodine &resent in the %od!. Moreo(er starch forms a com&lex with iodine which is usuall! color %lue indicating the formation of the said com&lex.

Starch h!drol!sis

Refere"ces

[1] Solomons, G., Fryhle, C., Snyder, S. Organic Chemistry. John Wiley and Sons Inc. New Jersey. !1".

Glucose 6. Gi,e a &(ecu(ar e%#(a"ati" fr the r(e f  starch as a" a"ti$te fr i$i"e #is"i"+. Starch is a &ol!saccharide com&osed of am!lose and am!lo&ectin. "m!lose is the %ranching &art of the

)*+ " Stud! of ,ar%oh!drates. Seattle -ni(ersit!. *1/. )0+ ,lassication Structure and ,hemical 2ro&erties of ,ar%oh!drates. 'or%ache(sk! 3erno&!l Medical State -ni(ersit!. *14 )/+ Saenger 5olfram. 3he Structure of  Blue Starch 6odine ,om&lex. S&ringer 7ink. 189/