Search results for query: *

In the meantime, if anyone else has suggestions on modifying my current chamber (or even roughly building a new one), I welcome ideas.

Thanks for the links. I hadn't considered used equipment. Even if I don't find exactly what I need, I might find an environmental chamber, that I could modify for use with UV bulbs. I'll look at the links more closely, and see if they're economically viable. Thanks!

I have a metal chamber that is 43in x 29in (32in tall), where the bottom is covered with about 3in of sand to grow bacteria. I want to be able to control temperature (5-50C) and humidity (10-90%), and I need help in designing the system. I would also like to be able to cycle the changes...

Thanks for the info. For lab tests, guar's microbial degradation can be addressed by making smaller (fresh) batches as I go. For commercial applications, the tote would typically only be used once, so perhaps vacuum-sealing it (or with N2) will prevent the microbes from wreaking havoc. But if...

Thanks for the help, much appreciated. Any idea what amounts of citric acid would be required? We're testing guar because it's more water-soluble than starch, and it's cheap. Is Carbopol as cheap as starch or guar? Thanks again.

From what I've read, guar is a natural polymer. I want to use it in a solution (mostly sugar and guar) to mix into sand to form a crust (after drying). I heard that citric acid should be added. I have two questions: - how much citric acid needs to be added? - what is the purpose of citric...

Thanks for the reply, Cory. I should have mentioned in my message that I have a couple of ASTM standards: for cohesive soil and for concrete. The resulting crust lies somewhere in between. I was hoping someone would have experience with something comparable, and would have some insights to...

A chemical has been developed for dust abatement, made up of polysaccharide, surfactant, mordant and water. I have to perform a compression test on the sample (solution mixed with sand and cured). The resulting crust is similar to concrete, but not as strong. I have to test various...

A chemical has been developed for dust abatement, made up of polysaccharide, surfactant, mordant and water. I have to perform a compression test on the sample (solution mixed with sand and cured). The resulting crust is similar to concrete, but not as strong. I have to test various...