What is Para-Aminobenzoic acid? Give the brief explanation of Para-Aminobenzoic acid.

Solutions

Expert Solution

Para-Aminobenzoic acid:

History:

Ansbacher demonstrated that depigmentation of the hair (achromotrichia) in mouse could be cured by feeding rice polishings or by adding p-aminobenzoic acid (PABA) to the diet.
PABA also appeared essential for the growth of rat and chick and also for bacterial multiplication.

Occurrence:

PABA is widely distributed in nature.
The good sources are liver, yeast, rice bran and whole wheat.
PABA occurs in conjugated form as a part of folic acid and its derivatives.

Properties:

PABA is a white crystalline substance.
It is sparingly soluble in cold water but freely soluble in hot water and alcohol.

Metabolism:

Woods, for the first time, observed that PABA blocks the bacteriostatic properties of sulfanilamide.
PABA is synthesized from shikimic acid via chorismic acid.

Deficiency:

The deficiency of PABA affects adversely the growth and the maintenance of a normal fur coat in rats.

Human requirements:

There is, at present, no evidence that PABA is an essential dietary factor for man.

Para-Aminobenzoic acid:

Para-aminobenzoic acid is abbreviated as PABA.
It is a natural substance.
It is sometimes called vitamin Bx, but it is not a true vitamin.
It is often used in sunscreen products.

Suhasini Buddi answered 1 year ago

Next > < Previous

Related Solutions

Case Studies: For each of the following scenarios, give a brief explanation of what you would...

Case Studies: For each of the following scenarios, give a brief explanation of what you would suggest, and why. You are working as a Nurse at a rural high school and have been asked to assess the body composition and overall health of the students. What specific body composition assessment technique would you use (consider price, ease of use, etc…)? Make sure you explain why you would choose this technique. (3 pts) You have been asked to give a presentation...

Define the meaning of deregulating an industry and give a brief explanation as to why the...

Define the meaning of deregulating an industry and give a brief explanation as to why the government might regulate an industry in the first place

3.What the formula for determining the Projected Benefit Obligation? Give a brief explanation of each component....

3.What the formula for determining the Projected Benefit Obligation? Give a brief explanation of each component. 4. How do we determine if a pension plan is over- or underfunded? (What two amounts do we compare?)

Give a brief explanation (just the key idea) of the theory of development of the self...

Give a brief explanation (just the key idea) of the theory of development of the self from Charles Horton Cooley and George Mead. Cooley: Mead:

Provide a brief explanation of the planning phase in developing business strategy. Give an example.

Give a brief explanation of the economic impact of tourism. Name two organizations that influence or...

Give a brief explanation of the economic impact of tourism. Name two organizations that influence or further the economic impact of tourism. Discuss the positive and negative impacts that tourism can have on a country in relation to tourism pollution and ecotourism. Describe the origin of government-sponsored recreation in consideration of the origin and purpose of national parks. Have national parks outlived their purpose? Explain the concept of recreation for special populations.

List and give a brief explanation of 5 physiological changes a person may go through as...

List and give a brief explanation of 5 physiological changes a person may go through as they age ?

True/False Give a brief explanation for your answer ____ 1. The purpose of the work opportunity...

True/False Give a brief explanation for your answer ____ 1. The purpose of the work opportunity tax credit is to encourage employers to hire individuals from specified target groups traditionally subject to high rates of unemployment. ____ 2. Molanda sells a parcel of land for $45,000 in cash and the buyer assumes Molanda’s mortgage of $20,000 on the land. Molanda pays a real estate agent $3,000 on the trasnaction. Molanda’s amount realized is $62,000. ____ 3. Cassie purchases a sole...

Please give a brief explanation on why these are the correct answers. Question 5: You believe...

Please give a brief explanation on why these are the correct answers. Question 5: You believe that Imani Inc’s stock will have an expected return of 18.2%. The company is expected to pay a dividend of $1.60 per year. The current market risk premium is 7%, what should you be willing to pay for the stock? Correct Answer: $8.79 Question 6: Suppose you invest 50% of your portfolio in Dorsey Pharmaceuticals which has a beta of 0.63, 25% of your...

Give a brief explanation of the Eight Golden Rules of Interface Design. State an example you...

Give a brief explanation of the Eight Golden Rules of Interface Design. State an example you have seen on a device, computer interface or web site that violates those rules. Do you agree with these rules? Please explain your answer. Are there any additional rules you would add?

Subjects