Why does cream go bad faster than butter
Some researchers think they have 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(小球体)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 b A. tiny globules B. watery regions C. bacteria communities D. little compartments [多项选择]下列关于协助冻结的说法正确的有()。
A. 不得协助任何单位或个人冻结个人存款,但法律另有规定的除外 B. 网点协助有权机关办理冻结前,应要求执法人员出具相关法律文书 C. 海关要求协助冻结的,应出具经直属海关关长或其授权的隶属海关关长批准暂停支付存款的书面通知 D. 税务机关要求协助冻结的,应出具经市级以上税务局(分局)局长批准的“暂停支付存款通知书” [单项选择]普罗塔哥拉有一句名言,“至于神,我既不知道他们是否存在,也不知道他们像什么东西。有许多东西我们认识不了的,问题是晦涩的,人生是短促的”。对此言论内涵的理解,准确的是()
A. 否定神的意志,反思人类自己 B. 希望知道神是否存在 C. 人要在自己的灵魂中发现神 D. 慨叹人生短暂认识有限 [多选题]视觉信号的基本颜色有( )。
A.红色 B.黄色 C.绿色 D.白色 [判断题]判断题
操作票应进行编号,已操作过的应注明“已执行”保存期不宜少 于 6 个月。 正确 错误 A.正确 B.错误 [单选题]3.55. 第55题配电所操作票,需经过三级审核:()自审:操作人根据模拟系统图核对所填写的操作票正确无误,签名后交监 护人.
A.填写人 B.监护人 C.负责人 D.许可人 [单选题]带电短接设备时,绝缘分流线或旁路电缆两端连接完毕且遮蔽完好后,应检测( )正常。
A.A.绝缘情况 B.B.连接情况 C.C.通流情况 D.D.电压情况 [填空题]烘炉中温阶段,烘烤温度在()℃。
[单项选择]关于胆汁的生理作用,下列哪项是错误的()
A. 胆盐、胆固醇和卵磷脂都可乳化脂肪 B. 胆盐促进脂肪的吸收 C. 胆汁可促进脂溶性维生素的吸收 D. 肝胆汁在十二指肠可中和一部分胃酸 E. 胆囊胆汁在十二指肠可中和一部分胃酸 我来回答: 提交
|