A normal range for blood urea nitrogen is generally 8 to 24 mg/dL for adult men (2.86 to 8.57 mmol/L) and 6 to 21 mg/dL (2.14 to 7.50 mmol/L) for adult women. However, urea nitrogen levels vary by age. Infants have lower levels than other people do.
Fortunately, freezing zucchini and other summer squash is a snap: All you do is cut it into half-inch slices, blanch it in a pot of boiling water for three minutes, transfer it to a bowl of ice water to cool, drain it, and bag it.
Dry the zucchini and place on a cutting board. 3. Slice the stem and the end of the zucchini off and throw away or add to your compost pile. Slice the remaining zucchini into 1/4 â 1/2-inch pieces for freezing. 4. Prepare a large bowl with ice water to cool the zucchini after it is blanced in the boiling water.