calcium 的定义
Chemistry, Biology.
- a silver-white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element in nerve conduction, heartbeat, muscle contraction, and many other physiological functions. Symbol: Ca; atomic weight: 40.08; atomic number: 20; specific gravity: 1.55 at 20°C.
更多calcium例句
- Inside that hunk of cheddar, calcium binds long protein strands called caseins into a type of web, and water and fat molecules occupy the space between those interconnected threads.
- According to the project’s website, calcium carbonate has “near-ideal optical properties.”
- Nutritionally, roots have a lot to offer, too, with carrots particularly high in vitamin A, and others rich in vitamin C, potassium, fiber, calcium and magnesium, to mention a few highlights.
- That DNA contained instructions to make a protein that would glow when calcium levels surged inside the cell — a technique called calcium imaging.
- The females use that calcium to form the hard shells of their eggs.
- I take calcium and vitamin D supplements, but prescription medications are generally only for women in menopause.
- Fat-free or skim milkEveryone knows milk is an excellent source of calcium that will keep your bones in tip-top shape.
- Feel good about using cottage cheese as a dip because it delivers calcium, quality protein and potassium.
- The rhino beetle—fried, stewed, grilled, or roasted—is high in calcium and protein.
- Excess calcium causing zinc and iron deficiency offers just one simple illustration of this kind of interaction.
- Crystals of calcium oxalate are insoluble in acetic acid or caustic soda.
- The long axis of the hip-roof crystal is often so shortened that it resembles the envelop crystal of calcium oxalate.
- The usual forms are: (a) Ammoniomagnesium phosphate crystals; (b) acid calcium phosphate crystals; and (c) amorphous phosphates.
- Characteristic octahedral crystals of calcium oxalate (Fig. 47) appear after ingestion of certain vegetables.
- The lights were lowered, a single calcium playing with its soft and silvery rays upon his face and shoulders.