1 In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water.  Parts per Million (ppm) is the weight-to-weight ratio of any ion to water.
If you refrigerate the rice, and you want to eat it cold, its perfectly fine. People eat cold rice salads all the time. Cold rice pudding is fine. Its just sitting around at room temperature that is the problem.
If a protein goes in cold it will cook faster on the outside than the inside; thatâs why weâre always telling you to bring your meats to room temperature before cooking. One more thing. Here are my thoughts about fresh shrimp: If youâre sure theyâre fresh i.e. NOT previously frozen, buyâem.