Question: Mineral oil, a mixture of high molecular weight alkanes, is sometimes used as a laxative. Why are individuals who use mineral oil for this purpose advised to avoid taking it at the same time they consume foods rich in fat-soluble vitamins such as vitamin A?
The mineral oils absorb the essential nutrients and thus interfere with the absorption tendency of the body.
Mineral oils are made by the ultra-refining, purification, and processing of petroleum. These oils are used in food because of their exceptional property to work well with very high and very low temperatures.
These oils are non-toxic and lighter than other oils.
Mineral oils have been found to absorb several micro-nutrients such as phosphorus, potassium, and vitamins A, D, E, and K.
Since mineral oils absorb micro-nutrients, they interfere with the nutrient absorption of the body. The micro-nutrients get absorbed in the mineral oil that is consumed soon after taking the food.
Thus, the nutrients are not absorbed by the body. Instead, they are passed out of the body by remaining absorbed in the mineral oils and alternatively- unabsorbed by the body.
It is therefore advised to take mineral oils on an empty stomach.
Question: Answer the following questions about compound A, which contains a group and OH group bonded to the carbon skeleton that consists of three six-membered rings in the conformation shown.
a. Are the and OH groups oriented cis or trans to each other?
b. Is a substituent on that is cis to the group located in the axial or equatorial position?
c. Is an equatorial Br at oriented cis or trans to the OH group?
d. Is the H atom on located cis or trans to the OH group?
e. Is a substituent on that is trans to the OH group located in the axial or equatorial position?
Question: For each compound drawn below:
a. Label each OH, Br, andgroup as axial or equatorial.
b. Classify each conformation as cis or trans.
c. Translate each structure into a representation with a hexagon for the six-membered ring, and wedges and dashed wedges for groups above and below the ring.
d. Draw the second possible chair conformation for each compound.
94% of StudySmarter users get better grades.Sign up for free