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  • Sulfite Test Strips

Can 10ppm of Sulfite & Quat Really Mean Zero?

2020-04-29|

Is 10ppm Really Zero? Test strips make semi-quantitative (fairly accurate) measurements of pH levels, concentrations of sanitizers such as chlorine & hydrogen peroxide or the [...]

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“New” Big Bang Theory DNA Model

Here’s a 36 base pair version that stands just over 6 feet (nearly 2m) tall and is as accurate as the original of our best in class DNA model. This model also features accurate major & minor grooves in spite of the extra height.