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  1. Y

    laser pointers

    Hi, does anyone know where I can buy 1mW red, green and blue/purple laser pointers? Red ones seem to be easy but I cannot purchase through ebay and one company (laserpointerpro) would not accept the school credit card for payment. I know you have to be aware of categories for lasers but I am at...
  2. Y

    yogurt production

    Hi, has anyone carried out the measuring pH change during yogurt production PAG? If so did you buy in a starter culture or did you use a yogurt like Yoplait and was it successful. Thanks