The bands observed from 600 [cm.sup.-1] to 1150 [cm.sup.-1] are characteristic of the starch and are also called starch fingerprints due to their furanose
and pyranose rings.
Since the amount of periodate consumed was more than twice the amount of formic acid produced, it is possible that many linkages exist in the pyranose 1,2-linked, 1,4-linked, 1,2,6-linked, 1,4,6-linked, and 1,2,4-linked forms or furanose
In the unlocked nucleosides, the furanose
ring's C2'-C3' bond is missing; it is thus a 2'-3'-acyclic-rN, a ribonucleoside analog (Figure 10, 2), which is often abbreviated as, for example, uG or uU.
plantarum isolated from pellets fed to the calves (incubated in both plain and 2.5% NaCl-MRS agar, Figures 2(a) and 2(b)) yielded the BBL-ID code 011066-3-062 characterized by positive reactions for L-methionine, L-phenylalanine, L-leucine, L-alanine, L-isoleucine, p-n-p-[beta]-D-galactoside, p-n-p-[beta]-D-glucoside, p-n-p-[alpha]-D-glucoside, p-n-p-N- acetylglucosaminide, 4MU-[beta]-D-cellobiopyranoside, furanose
, and pyranose.
HMF is actually formed by dehydration of fructose in its furanose
form through a series of furan intermediates .
Very recently, we reported the synthesis and comparative antimicrobial studies of a number of furanose
, pyranose and disaccharide acetates , and acylates .
The most common sugar residues in saponin compounds are hexoses (glucose, galactose), pentoses (arabinose, xylose), methylpentoses (furanose
, quinovose, rhamnose), and uronic acids (glucuronic acid, galacturonic acid), which are linked to aglycone through the ether glycosidic bonds generally in 3-0 position (Tava et al.
Carbocyclic nucleosides (carbanucleosides)  are modified nucleosides  in which a methylene group has replaced the oxygen atom of the furanose
27-O-Me modification as well as the 2'O-methoxyethyl (27-MOE) and 2-fluoro (27-F) chemistries is modified at the 2 position of the sugar moiety, while LNA comprises a group of bicyclic RNA analogues in which the furanose
ring in the sugar-phosphate backbone is chemically locked in an RNA mimicking N-type (C3'-endo) conformation by the introduction of a 2,-O,4'-C methylene bridge [72-76].
A number of other furanose
sugars can also act as KHK substrates .