Recent content by schordinger

The pathway of biosynthesis of nucleotide is commonly available in most textbook, but it is a bit difficult to find out that of nucleoside... I know nucleoside can be useful drug, and it also exist in living body, but for what ?? for making nucleotide ?? or it form just by dissociation from...

I found that quite interesting too, if this drug would already racemize why only optical impure drug would result in disease ?? if it racemize, even optically pure thalidomide can be dangerous... so could u mind telling us how this occur ?? Thx :smile:

I know scattering would give polarized light on the in 90 degree of the beamdirection, but...how about somewhat "multiple scattering" ?? how it affect the polarization ?? the concept of multiple scattering far too difficult for me, can any guy explain that to me pls?? :eek: Thx

Actually, I really wonder what the membrane is... why the reaction occur in the inside rather than outside... would some molecule exist only inside the bug... could those molecule are too large to diffuse out... what would occur if the composition of the mixture is changed...

using chemical to "create first life" by yourself! Have anyone try this? I think it is a very good experiment can be done at home! http://www.nature.com/nsu/040426/040426-5.html It seem extremely funny, and the condition can be modified by our own... I think something more instresting...

do you means "absorption occur when light passing through transparent materials" ? how is "this absorption" different from the absorption caused by electron excitation ? or the same ? If the speed of light in a media is related to the absorb and re-emits, does "absorptivity" (in...

"why sth is transparent" is ALWAYS a question for me... In secondary school, teacher tell me the "band gap" explanation, it sound good, but more I study, more problems I found... firstly, is there really no interaction between light and transparent materials ? if so, how refraction...

remember interesting project... but remember that if you want the nanotube network to be effective, then those nanotube should be closely packed, and if so, light scattering would occur significantly... also, how you pump water away or turn water to gas ?? by applying electric potential...

"particles were small enough, light would go through" do you mean light scattering? Smaller particle scatter light in lower degree and larger particle in higher degree. This is not related to molecular structure...

"kcat/Km" of the two enzyme is indeed different... Let me describe a bit more detial... what I have done was comparing two modified enzymes, one of it (just call it enzyme A) has smaller kcat and Km value. However, the kcat/Km is larger than the other (say, enzyme B). Experimental...

I see... but could that two enzyme catalyze reaction at same rate? or it is impossible to predict, with only knowing kcat/Km ? actually, I am studying some kinetics of a modified enzyme, and found that the reaction proceed slower than original one, but the kcat/Km of the modified one is...

why you fit the data with a 3 degree why not u fit your data with Michaelis-menten equation?

kcat/Km is representing the enzyme efficiency, isn't it? however, if two enzyme have same value of kcat/Km, but if one of them have value of kcat smaller than the other, is they are really equally effective?? why not the smaller kcat enzyme have a lower efficiency ?

Actually... I am really confuse that why some compound would fluoresce stronger in polar environment (solvent) than non-polar solvent, like Fluorescein, and some other compound, like Acrylodan would fluoresce stronger in Non-polar environment...?? It seem that Fluorescein is a interesting...

changing absorptivity Solvent polarity would affect the wavelength of max absorption peak, but how?? and How the solvent affect the absorption coefficient?? is that related sth called Franck-Condon factor?? Also, Flourescent quantum yield also depend on the solvent polarity?? How...