Bissoy.com
Doctors Medicines MCQs Q&A

Who observed citric acid as a by-product of calcium oxalate produced by Penicillium glaucum?

Who observed citric acid as a by-product of calcium oxalate produced by Penicillium glaucum? Correct Answer Wehmer

Wehmer in 1893 observed citric acid as a by-product of calcium oxalate produced by Penicillium glaucum. This resulted in the encouragement of the production of citric acid.

Related Questions

In a batch process, the reaction takes place in the presence of an acid medium. The acid is drained from the reaction vessel at the rate of 15ml/s as a result of the density difference of the acid from the reacting component. To avoid wastage of acid, it is recycled to an acid tank which has 1000 L capacity. The acid drained from the reaction vessel, picks up 50 g/L solids from the reactor. Acid is fed once again to the process from acid tank. When the process is started, the acid is almost pure in the tank as a result of filtration. As the reaction proceeds, acid in the tank gets more and more contaminated with the solids. The concentration of the solids should not exceed 100 g/L from the process point of view. The batch time is 16h. Estimate whether the concentration of the solids will exceed 100g/L during the batch reaction.
Which of the following chemicals are used to treat the instruments made out of polymers? i) Ethylene Oxide ii) Hydrochloric Acid iii) Silver Cyanide iv) Ozone v) Bleach vi) Saline Solution vii) Sulphuric Acid viii) Glutaraldehyde and Formaldehyde ix) Phthalaldehyde x) Hydrogen Peroxide xi) Nitric Acid xii) Peracetic Acid xiii) Silver xiv) Formic Acid xv) Citric Acid
Match the name of the acid given in column I with the corresponding food items in which they are found given in column II.   Column - I   Column - II (a) Acetic acid (i) Spinach (b) Lactic acid (ii) Lemons (c) Oxalic acid (iii) Curd (d) Citric acid (iv) Vinegar
Paul Heller mixture is a combination of ammonium oxalate and potassium oxalate in the proportion of-
A laboratory teacher had 1.5 litres of concentrated sulfuric acid. She replaces concentrated sulfuric acid with water after every class till the carton is empty. One student needs 10 ml of sulfuric acid mixture in every class. First class had 20 students and since then all other classes observed 10 students. Calculate total quantity of water with which mixture of sulfuric acid and water is replaced till carton is empty. Note 1.5 litres of concentrated sulfuric acid had 90% sulfuric acid and rest water
Is Penicillium notatum and Penicillium chrysogenum both are same in terms of yield?
Which among the following is an incorrect pair? Natural source   Acid I. Vinegar Acetic acid II. Curd Lactic acid  III. Tamarind Citric acid
Consider a reaction of polymer formation by condensation polymerization, completed in n-steps, with the liberation of a certain byproduct. How many total molecules of byproduct are released as a result of complete reaction?
Solution-1 containing 10% nitric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% nitric acid and 10% acetic acid at the rate D, the product formed contains 30% nitric acid and 20% acetic acid at the rate P, how many independent equations containing F, D, and P are possible?
Solution-1 containing 10% hydrochloric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% hydrochloric acid and 30% acetic acid at the rate D, the product formed contains 20% hydrochloric acid and 30% acetic acid at the rate P, how many independent equations containing F, D, and P are possible?