Podcast
Questions and Answers
What is the purpose of the screen in the base of the mill casing?
What is the purpose of the screen in the base of the mill casing?
What happens to the material in the mill until a certain point?
What happens to the material in the mill until a certain point?
What is a characteristic of the screen in the mill?
What is a characteristic of the screen in the mill?
What is the outcome of the material being retained in the mill?
What is the outcome of the material being retained in the mill?
Signup and view all the answers
What is the function of the screen in relation to the material?
What is the function of the screen in relation to the material?
Signup and view all the answers
What can heat affect?
What can heat affect?
Signup and view all the answers
What can affect the size of a product?
What can affect the size of a product?
Signup and view all the answers
What is the effect of heat on thermolabile materials?
What is the effect of heat on thermolabile materials?
Signup and view all the answers
What is a characteristic of thermolabile materials?
What is a characteristic of thermolabile materials?
Signup and view all the answers
What type of materials are affected by heat?
What type of materials are affected by heat?
Signup and view all the answers
What type of pharmaceutical materials have high toughness?
What type of pharmaceutical materials have high toughness?
Signup and view all the answers
What is a characteristic of fibrous pharmaceutical materials?
What is a characteristic of fibrous pharmaceutical materials?
Signup and view all the answers
Which of the following pharmaceutical materials are NOT characterized by high toughness?
Which of the following pharmaceutical materials are NOT characterized by high toughness?
Signup and view all the answers
What is a common property of pharmaceutical materials that are fibrous in nature?
What is a common property of pharmaceutical materials that are fibrous in nature?
Signup and view all the answers
Which of the following is a characteristic of many pharmaceutical materials?
Which of the following is a characteristic of many pharmaceutical materials?
Signup and view all the answers
What is the result of excessive feed?
What is the result of excessive feed?
Signup and view all the answers
What is the opposite of a cushioning effect?
What is the opposite of a cushioning effect?
Signup and view all the answers
What occurs when feed is excessive?
What occurs when feed is excessive?
Signup and view all the answers
What is the term for too much feed?
What is the term for too much feed?
Signup and view all the answers
At what point does maximum size reduction occur?
At what point does maximum size reduction occur?
Signup and view all the answers
What type of materials are typically processed using coarse degree of size reduction?
What type of materials are typically processed using coarse degree of size reduction?
Signup and view all the answers
What is the purpose of coarse degree of size reduction for tough fibrous materials?
What is the purpose of coarse degree of size reduction for tough fibrous materials?
Signup and view all the answers
Which of the following examples is NOT a type of material that requires coarse degree of size reduction?
Which of the following examples is NOT a type of material that requires coarse degree of size reduction?
Signup and view all the answers
What is the significance of coarse degree of size reduction in the processing of tough fibrous materials?
What is the significance of coarse degree of size reduction in the processing of tough fibrous materials?
Signup and view all the answers
What is the characteristic of materials that require coarse degree of size reduction?
What is the characteristic of materials that require coarse degree of size reduction?
Signup and view all the answers
Study Notes
Milling in Pharmaceutical Materials
- Fibrous drugs, such as roots, peels, and wood, exhibit high toughness.
- A screen in the mill casing acts as a self-classifying mechanism, retaining material until a sufficient degree of size reduction is achieved.
- Coarse size reduction is suitable for tough fibrous materials, such as liquorice and rhubarb, prior to extraction.
Factors Affecting Milling
- Heat can affect thermolabile materials during the milling process.
- The size of the product can be controlled, with maximum size reduction occurring under optimal conditions.
Milling Limitations
- Excessive feed can produce a cushioning effect, limiting the milling process.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the properties of pharmaceutical materials, including their toughness and structure, particularly in fibrous drugs.
