Because of spam, I personally moderate all comments left on my blog. However, because of health issues, I will not be able to do so in the future.

If you have a personal question about LI or any related topic you can send me an email at I will try to respond.

Otherwise, this blog is now a legacy site, meaning that I am not updating it any longer. The basic information about LI is still sound. However, product information and weblinks may be out of date.

In addition, my old website, Planet Lactose, has been taken down because of the age of the information. Unfortunately, that means links to the site on this blog will no longer work.

For quick offline reference, you can purchase Planet Lactose: The Best of the Blog as an ebook on or Almost 100,000 words on LI, allergies, milk products, milk-free products, and the genetics of intolerance, along with large helpings of the weirdness that is the Net.

Sunday, March 30, 2008

Your Guess Is As Good As Mine

I have absolutely no idea what is being said here, but congratulations to newly minted PhD, Jeremy Stewart MacLeod.

Jeremy Stewart McLeod - Doctor of Philosophy in Bioprocess Engineering

Dr McLeod focused on the nucleation and growth kinetics of alpha lactose monohydrate. Lactose represents about one-third of the solids in cows' milk, and is recovered using crystallisation.

A model has been produced that can predict the changing concentration profile as lactose crystallises from an industrial solution. The primary nucleation of alpha lactose monohydrate was investigated, including identifying the changing relationship as lactose nucleation moves from being dominated by the heterogeneous mechanism to homogenous mechanism.

The effect of mixing was studied using a Rushton turbine and a Venturi to agitate the system. Increasing agitation increased the frequency of activated molecular collisions, but the critical nucleus size remained constant. A strong correlation was found, for both mixing systems, between the nucleation rate and the frequency of vortex shredding.

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