Why does cream go bad faster than
butter Some researchers think they find the answer, and it comes down to the
structure of the food, not its chemical composition--a finding that could help
rid some processed foods of chemical preservatives. Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery. Both are emulsions--tiny globules (小球) of one liquid evenly distributed throughout another. "The difference lies in what’s in the globules and what’s in the surrounding liquid", says Brocklehurst, who led the investigation. In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. "This means that in cream, the bacteria are free to grow throu A. it suggested a way to keep some foods fresh without preservatives B. it discovered tiny globules in both cream and butter C. it revealed the secret of how bacteria multiply in cream and butter D. it found that cream and butter share the same chemical composition [填空题] Why does cream go bad faster than butter Some researchers think that it comes down to the structure of the food, not its chemical (36)__________—a finding that could help rid some processed foods of chemical preservatives.
Cream and butter contain much the same (37)__________, so why cream should sour much faster has been a (38)__________. Both are emulsions—tiny globules of one liquid evenly (39)__________ throughout another. The difference lies in what’’s in the globules and what’’s in the surrounding. In cream, fatty globules drift about in a sea of water. In butter, globules of a watery (40)__________are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the (41)__________. This means that in cream, the bacteria are free to grow throughout the mixture. When the situation is (42)__________, the bacteria are locked away in (43)__________buried deep in the sea of fat. (44)_________________________. They also slowly po
我来回答: 提交
|