Compare and contrast any TWO of the following thermal analysis
techniques;
(i) Differential Scanning Calorimetry, DSC,
(ii) Differential Thermal Analysis, DTA,
(iii) Thermogravimetric Analysis, TGA,
18 marks so please give a proper answer
Material Science:
If you were to be given a DSC (Differential scanning
calorimetry) trace of a polymer, how would you identify changes and
characteristics of the polymer? I understand this is a vague
question, but please try your best, I'm lost!
For a Differential Scanning Calorimetry
Experiment,
The samples are contained in aluminum pans with crimped-on
covers. The instrument is stationary during operation, so samples
placed in open pans would not spill. Why do you think the covers
are needed?
Applications of higher order differential equations
A spring has one of its ends fixed, and a force of 15 N
stretches it 20cm. A mass of 4 Kg is attached to the end of the
spring, and the system is set in motion with initial position = 60
cm and initial velocity = 1.5 m/s.
(a) Find the spring constant.
(b) Write a problem of initial conditions for spring stretching, in meters.
(c) Solve the problem posed in (b).
(d)...
Applications of higher order differential equations
A spring has one of its ends fixed, and a force of 15 N
stretches it 20cm. A mass of 4 Kg is attached to the end of the
spring, and the system is set in motion with initial position = 60
cm and initial velocity = 1.5 m/s.
(a) Find the spring constant.
(b) Write a problem of initial conditions for spring stretching, in meters.
(c) Solve the problem posed in (b).
(d)...
Explain the principle of “differential gene expression” and how
different genes are expressed in different cell types. Describe in
detail the two main mechanisms of the transcriptional regulation of
gene expression. If you were going to “design” a transcription
factor with an unlimited number of protein domains, how would you
design this transcription factor so that it could take care of all
of the transciptional regulation/expression of the muscle gene
myoD.
Please explain what is the main idea behind differential
analysis. What are relevant or differential costs? What are the two
necessary characteristics of differential costs? Can fixed costs be
differential or relevant in your decision?
Explain by using the GATT Agreement what are the
following:
Enabling Clause, Precautionary principle, special and
differential treatment and the risk assessment in the context of
SPS measures
Explain in detail the following techniques giving their
principle, different types, and applications:
a.Ion Exchange Chromatography
b.ColumnChromatography(Size-Exclusion and Affinity)
c.Thin Layer Chromatography