Chemosensory similarities among oils: does viscosity play a role?
Chemosensory similarities among oils: does viscosity play a role?
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油之间的化学感觉相似性：粘度是否起作用？
DOI：
10.1093/chemse/19.2.155
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发表时间：
1994
期刊：
影响因子：
3.5
通讯作者：
Ramirez,I
中科院分区：
文献类型：
--
作者：
Ramirez,I
人们普遍认为粘度在脂肪的感知中起着重要作用。大鼠摄入油悬浮液后，通过用氯化锂处理它们来避免接触油悬浮液。对照大鼠在饮用媒介物后接受相同的氯化锂注射。检查了三种化学性质不同的油：甘油三酯油、硅油和矿物油。经过训练，老鼠避开其中一种油的 4% 水悬浮液，确实避免了含有任何其他油的悬浮液，尽管老鼠可以区分这些油。油悬浮液的粘度略大于单独载体的粘度。然而，经过训练避免使用油悬浮液的大鼠并没有避免粘度与油悬浮液相似的液体。为了评估大鼠能够分别感知油的粘度和载体的粘度的可能性，测试了大鼠对粘度远高于和远低于它们被训练要避免的油的厌恶程度。经过训练避免使用粘度为 67 cp 的三油酸甘油酯的大鼠，可靠地避免使用粘度为 5 和 203 cp 的硅油。然而，经过训练避免油的老鼠并没有避免粘度为 22-29 cp 的无油液体。最后的实验检查了粘性或非粘性载体的使用是否会影响条件厌恶。载体粘度没有出现显着影响。因此，老鼠认为化学性质多样的油具有一些可感知的共同属性。有人提出，这种共同的物理属性是边界润滑而不是粘度。
It is widely thought that viscosity plays an important role in the perception of fats. Rats were conditioned to avoid oil suspensions by treating them with lithium chloride after they had ingested the oil suspension. Control rats received the same lithium chloride injection after they drank vehicle. Three, chemically different, oils were examined, triglyceride oil, silicone oil and mineral oil. Rats trained to avoid a 4% aqueous suspension of one of these oils, reliably avoided suspensions containing any of the other oils, although the rats could discriminate between the oils. The viscosity of the oil suspension was slightly greater than the viscosity of the vehicle alone. However, rats trained to avoid an oil suspension, did not avoid a fluid having a viscosity similar to that of the oil suspension. In order to assess the possibility that rats could sense the viscosity of the oil separately from that of the vehicle, rats were tested for their aversion to oils having viscosities much higher and much lower than that of the oil they were trained to avoid. Rats trained to avoid triolein having a viscosity of 67 cp, reliably avoided silicone oils having viscosities of 5 and 203 cp. However, rats trained to avoid oil did not avoid an oil-free fluid having a viscosity of 22–29 cp. A final experiment examined whether the use of viscous or non-viscous vehicles influenced the conditioned aversion. No significant effect of vehicle viscosity appeared. Thus, chemically-diverse oils are perceived, by rats, to have some perceptible attribute in common. It is proposed that this common physical attribute is boundary lubrication rather than viscosity.