I believe that you are inquiring about the molecular formulae. The molecular formulae of the compounds you asked about, and the molecular formula of any organic compound for that matter, can be easily determined today compared to 100 years ago. In fact, often, nuclear magnetic resonance (NMR) techniques or gas chromatography coupled with mass spectrometry (GC/MS) alone are sufficient to determine with near cetainty the molecular formula of a compound. Sometimes, though, one or more tests in the laboratory may be required, especially if the compound contains an element other than carbon, hydrogen and oxygen.
For compounds that are not excessively large or structurally complex, a H-1, or "proton," NMR spectrum alone is sufficient to elucidate the structure, and thus, the molecular formula to a very high degree of certainty.
For larger and/or complex compounds that are volatile enough, or that can be made sufficiently volitile through chemical derivation, GC/MS can identify the compound provided its GC retention time and fragmentation pattern matches those of a known compound stored in a computer database.
If one wishes to identify a compound that is not volatile or stable enough for a GC, or has probably not yet been discovered such as an essential oil from a rare plant, then NMR is the best tool available for the job. A C-13 NMR spectrum provides the number of carbon atoms in different environments in the molecule. A two-dimensional
C-13/H-1 NMR spectrum indicates which hydrogen atoms are bound to which carbon atoms.
In closing, NMR techniques are the most popular and powerful tools in use today for determining the molecular formula and three-dimensional structure of an unknown compound.
The monosaccharides fructose and galactose are isomers of glucose.
Glucose, Galactose, & Fructose
glucose, fructose. and galactose! :D
Because enzymes can only catalyse reactions of molecules with specific shapes. Glucose, galactose and fructose all have different shapes, so they need to undergo different reactions in order to be metabolised. All sugars are converted to fructose phosphate before metabolism begins. This happens to fructose by phosphorylating it directly, to glucose by phosphorylating glucose, then converting the glucose phosphate to fructose phosphate, and to galactose by converting the galactose to glucose.
The monosaccharides important in nutrition are glucose, fructose, and galactose. These carbohydrates are important as they are the simplest form of sugar that can be easily absorbed and utilized by the body for energy.
The three simple sugars absorbed into the bloodstream are glucose, fructose, and galactose.
Galactose and fructose
Glucose, Fructose, and Galactose are all examples of monosaccharides.
The monosaccharides fructose and galactose are isomers of glucose.
glucose, fructose, sucroseI believe glucose, galactose, and fructose are the three most common.
D-Mannose (C6H12O6) D-Glucose (C6H12O6) D-Galactose (C6H12O6)CHO CHO CHO I I IHOCH HCOH HCOHI I IHOCH HOCH HOCHI I IHCOH HCOH HOCHI I IHCOH HCOH HCOHI I ICH2OH CH2OH CH2OH
glucose, fructose, and galactose
Glucose, Fructose and Galactose.
Glucose, Fructose and Galactose.
Glucose, Galactose, & Fructose
glucose, fructose, galactose
There are three monosaccharides: glucose, fructose and galactose.