Homework Help for Science

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I need to collect information and to write a full description for the following components related to “titanium or its alloys” topic related to dental or craniomaxillofacial tissue engineering as the following

Abstract –

Chemical structure and properties –

Common uses –

Mechanical properties –

Swelling and degradation properties –

Porosity –

Scaffold fabrication methods –

Advantages and disadvantages –

Conclusion –

References (in a separate page, no upper limit for citing references, use standard journal formatting for references) – 5 pts

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1. Anybody please help me with this please

1. Please help me thank you

Answer the following question:

1. In your own words, explain why, if two compounds have the same LD50 value, they aren’t necessarily as toxic. Make sure to include the term Threshold in your answer. 

1. An LD50 value is the best measure available to indicate the potential for a compound to cause harm, to be toxic. However, there are six limitations that we looked at and explained. Below, using your own words, name each of these limitations and explain in detail (and with an example/scenario if possible) why it’s a limitation.

Answer the following questions:

1. Describe the experiments that need to be done in order to determine the LD50 and what a chart would look like (sketch this out and label axes and important points)

1. An LD50 value is the best measure available to indicate the potential for a compound to cause harm, to be toxic. However, there are six limitations that we looked at and explained. Below, using your own words, name each of these limitations and explain in detail (and with an example/scenario if possible) why it’s a limitation.

answer the following questions:

1. When you are exposed to more than one compound, one of the following can be observed: (1) Additive, (2) Synergistic, and (3) potentiation. Define each term and give an example using values or a bar chart. 
2. Define and distinguish sensitivity, tolerance, and resistance with respect to exposure to a compound.
3. Define LD50
4. Why is it that the lower an LD50, the more toxic it is?

1. Describe how would you determine if exposure to a compound is toxic?

2. Describe and distinguish chronic and acute exposure to a compound?

3. Define and distinguish local and systemic effect of a compound?

Answer the following question:

1. As a scientist working in a government lab, you have been given full control over the production of a new compound. The compound was isolated from the horse chestnut tree, a tree which only grows throughout 20% of the world and reaches maturity in 75-80 years. It was found that only the flowers contain the compound of interest (shown to the right). Choose whether you would extract from the natural source or chemically synthesize the compound. Explain and justify three reasons that support the choice you made and one reason, that is different than anything you mentioned, why your choice might not be the best – detail required in all answers(9 marks)

1. As a scientist working in a government lab, you have been given full control over the production of a new compound. The compound was isolated from the horse chestnut tree, a tree which only grows throughout 20% of the world and reaches maturity in 75-80 years. It was found that only the flowers contain the compound of interest (shown to the right). Choose whether you would extract from the natural source or chemically synthesize the compound. Explain and justify three reasons that support the choice you made and one reason, that is different than anything you mentioned, why your choice might not be the best – detail required in all answers (9 marks)

What is a contour line?

Contour interval: ____________

Maximum Possible Elevation: ____________

Gradient: ____________

 

 

Highest Possible Elevation of x: ____________

Gradient from C to D: ____________