Xylose vs Xylan?
Hello, I work for a cellulosic ethanol company and keep getting asked about xylose and xylan. Can someone give me an intelligent yet succinct answer as to the difference between the two? Please include how you came upon this knowledge (if you're a professor or student or internet guru).
Asked by Bunny Squiers 1 year ago.
how the hell did the "cellulosic ethanol company" HIRE you in the first place!! :D Answered by Mark Nanthanong 1 year ago.
What contains Xylose?
What kind of carbohydrates contain xylose, also known as wood sugar?
Asked by Un Trapani 1 year ago.
Xylose is not the same as Xylitol Xylose is a Wood or beechwood sugar; an aldopentose, isomeric with ribose, obtained by fermentation or hydrolysis of naturally occurring carbohydrate substances such as wood fiber. Answered by Warren Welsh 1 year ago.
One common source is sugar-free gum. Answered by Reynalda Wragg 1 year ago.
Are xylose and ribulose starches?
are they starches?
Asked by Nicolas Creeks 1 year ago.
Xylose is a aldopentose and ribulose is an ketopentos. Both are 5 carbon sugars. Xylose is the main building block for hemicellulose, which comprises about 30% of plant matter. Xylose is otherwise pervasive, being found in the embryos of most edible plant. Ribulose sugars are composed in the pentose phosphate pathway. They are important in the formation of many bioactive substances. Answered by Charlie Jakubov 1 year ago.
No, they are sugars. Monosaccharides, to be exact. Starch is a polymer of sugar units called a polysaccharide. Answered by Domonique Wangberg 1 year ago.
What is the chemical equation in the bial's test using galactose, fructose and xylose?
Asked by Sharan Calligy 1 year ago.
Lancenigo di Villorba (TV), Italy YOUR QUESTIONS Your request is very heavy! How can Yahoo!Answer permit me to draw configurational diagrams for monosaccharides? Nonethess, I can get you the reactivity order among the saccharides interested you. The faster test is given off by xylose, the slower by fructose...galactose react not. How I can do say? Furfural is involved....Xylose is a pentose, hence is a furanose ; fructose is not a pentose but it is still a furanose ; galactose is not a furanose, it is a pyranose. Go to the underwritten basis on Bial's mechanism. ABOUT BIAL'S TEST This lab's essay permits you a singular test interesting saccharides stuffs. The analyte (e.g. saccharide) went put in a glass-tube and it is added by Bial's reactive. The latter is an aqueous mixture of orcinol (e.g. 1-methyl-3,5-di-oxybenzene) and concentrated hydrochloric acid's solution. You execute the test in warm-bath conditions. Positive result happens if you distinguish a final greenish hue of the mixture. Strong acidity and temperature conditions permits breaking of glycosidic bonds (e.g. very strong bonds) between saccharidic units, hence the latters undergo their "penta- and/or hexatomic ring" 's opening (saccharide units start from Haworth's rings toward Fischer's chains). Now, the resulting oxydrilated chains may lose water's molecules and they convert themselves in furfural or its derivatives. Furfural acts an electrophilic agent toward orcinol, so you obtain poly-condensation products (furfural is produced by saccharide stuffs having pentatomic rings, so-called furanose saccharides). Obviously, any saccharide containing exactly five carbon atoms (e.g. pentose saccharides) cannot form polyatomic rings greater than five carbon atoms : so, any pentose saccharides generate furfural and it give off positive result to Bial's test. Among furfural's derivatives involved in Bial's reaction, you may meet often methylol-furfural. The latter is produced by saccharide stuffs having more than five carbon atoms (e.g. they belong not to pentose saccharides) but still containing only pentatomic rings (e.g. they belong to furanoses even). Bial's test give off a positive result but darker than pentose ones. At this point you can see greenish hue in differnt graduations (pale for pentose hence pentatomic furanose saccharides, dark green for other type of furanose ones). CONCLUSION ON BIAL'S RESULTS Since furfural show a better electrophilic powerful than its derivatives (e.g. methylol-furfural), you can remark that furanose saccharides react while the pyranosic ones do not. Among furanose saccharides, there pentose and not-pentose : -) the former ones react faster than the others; -) the former ones give off paler greenish hue than the others. I hope this helps you. Answered by Adelaida Gerould 1 year ago.
Calculate the molarity of 100 ug/ml solutions of glucose, fructose and xylose?
Calculate the molarity of 100 ug/ml solutions of glucose, fructose and xylose? can someone help me with this? also what is the molecular weight of glucose, fructose and xylose?
Asked by Corinne Storrs 1 year ago.
what you should know: basic stoichiometry, molar mass glucose =180 g, molar mass fructose =180 g, molar mass xylose =150 g; Molarity =mol/L, 1 x10^6 ug =1 g, 1 x10^3 mL =1 L, 1 mol =amount of a substance 1. solve for L using the molarity equation 100 ug/mL x(1000 mL/1 L)= ANS 2. solve for mol using the molarity equation 100 ug/mL x(1 g/1 x10^6 ug) x(1 mol/180 g)= ANS 3. solve for M using the molarity equation M=mol/L =ANS 2/ANS 1 repeat steps for fructose and xylose. note that fructose and glucose has same molar mass so ANS is the same for both. use a calculator to compute the expression. Answered by Jenna Thanos 1 year ago.
A bomb calorimetry experiment is performed with xylose, C5H10O5(s), as the combustible substance.?
The data obtained are mass of xylose burned 1.183heat capacity of calorimeter 4.728 kj/celsiusinitial calorimeter temperature 23.29 celsiusfinal calorimeter temperature 27.19 celsius (a) what is the heat of combustion of xylose, in kilojoules per mole?(b) write the equation for the complete combustion...
Asked by Jamie Zavacky 1 year ago.
The data obtained are mass of xylose burned 1.183 heat capacity of calorimeter 4.728 kj/celsius initial calorimeter temperature 23.29 celsius final calorimeter temperature 27.19 celsius (a) what is the heat of combustion of xylose, in kilojoules per mole? (b) write the equation for the complete combustion of xylose, and represent the value of delta Hin this equation. (assume for this reaction that delta U=delta H) Answered by Janee Noreen 1 year ago.
C5H10O5 + 5O2= 5H2O + 5CO2 Xylose= C5H10O5= 5*16 + 10 + 5*12= 150 g/mol q= m Cdelta T= 4.728 kj/C * (27.19-23.29 C)= 3.9 C * 4.728 kJ/C= 18.44 kJ 18.44 kJ / 1.183 g/ (150 g/mol)= 2338.12 kJ/ mol Answered by Gilma Mehlman 1 year ago.
Bomb Calorimetry Equation Answered by Odell Riech 1 year ago.
Does the solvent Xylene solve Xylose?
Asked by Mavis Pronto 1 year ago.
It should not. Xylene is a very non-polar solvent. Xylose is a monosaccharide and is a very polar molecule. So, it should not dissolve in xylene at all. Answered by Edie Praylow 1 year ago.
Solubility xylose in water?
help me plizzz! ...i need to know about solubility data xylose (C5H10O5) in water at two different temperatures (the range of temperature is between 0-80 Celcius degree ? without this, i cannot do our final project. i will vote u the best answer..thnx for the help
Asked by Abigail Guyette 1 year ago.
This info data sheet reads xylose is very soluble in water. But no spacific temp of the water is not given - other than 'cold' and 'hot'. Answered by Joleen Manolis 1 year ago.
Xylose Solubility Answered by Tesha Valenzano 1 year ago.