| 41. | Although " preheating " makes some sense, as you are heating the oven before putting the dish in it.
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| 42. | Some preliminary tasks, such as preheating ovens and bringing water to a boil, are done in advance of each round.
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| 43. | 4 . Space evenly apart on a parchment-lined cookie sheet and chill for 15 minutes while preheating oven to 400 degrees.
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| 44. | Cooking with light as opposed to microwaves or raw heat provides maximum flexibility and versatility _ and there's no preheating required.
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| 45. | Its lead-acid rechargeable battery was sensitive to shock, required frequent maintenance before use, and required preheating for best performance.
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| 46. | *Preheating is useful if you are cooking something based strictly on time, for example, at 300 degrees for an hour.
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| 47. | By preheating the oven you create the pocket of hot air desired for baking and then the burners turn themselves down / off.
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| 48. | Like a microwave oven, it requires no preheating, and it cooks food in about a third the time of a standard oven.
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| 49. | Additional material and heat balances can be made to quantify the thermal advantage from preheating the combustion air, or enriching it in oxygen.
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| 50. | One could also replace L-glutamic acid with L-glutamine without preheating it in an oil bath and then add phosphoric acid.
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