Principles of General, Organic, Biological Chemistry
2nd Edition
ISBN: 9780073511191
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Question
Chapter 15.7, Problem 15.16P
Interpretation Introduction
Interpretation:
Ions do not readily diffuse through the interior of the cell membrane has to be explained.
Concept Introduction:
Cell membrane is a thin membrane that separates the cell from the exterior environment and protects it from the outside. It is also called plasma membrane and is composed of double layer of phospholipids.
It allows certain particles into the cell and keeps the unwanted substances away from the cell and maintains cell integrity.
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(a
4 shows scanning electron microscope (SEM) images of extruded
actions of packing bed for two capillary columns of different diameters,
al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the
same stationary phase, spherical particles with 1-um diameter.
A) When the columns were prepared, the figure shows that the column with
the larger diameter has more packing irregularities. Explain this observation.
B) Predict what affect this should have on band broadening and discuss your
prediction using the van Deemter terms.
C) Does this figure support your explanations in application question 33?
Explain why or why not and make any changes in your answers in light of
this figure.
Figure 4 SEM images of
sections of packed columns
for a) 750 and b) 30-um-i.d.
capillary columns.³
fcrip
= ↓ bandwidth Il temp
32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual
components of the van Deemter equation and consequently, band broadening?
Increase temperature
Longer column
Using a gas mobile phase
instead of liquid
Smaller particle stationary phase
Multiple Paths
Diffusion
Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.).
A) Predict whether decreasing the column inner diameters increase or decrease bandwidth.
B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or
decreasing bandwidth as a function of i.d. and justify your answer.
Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was
obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles.
35
20
H(um)
큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 15 Solutions
Principles of General, Organic, Biological Chemistry
Ch. 15.1 - In which solvents or solutions will a lipid be...Ch. 15.2 - (a) Draw a skeletal structure for each fatty acid....Ch. 15.2 - Prob. 15.3PCh. 15.2 - Prob. 15.4PCh. 15.3 - Draw the structure of a wax formed from stearic...Ch. 15.3 - One component of jojoba oil is a wax formed from...Ch. 15.3 - What hydrolysis products are formed when cetyl...Ch. 15.4 - Draw the structure of a triacylglycerol that...Ch. 15.4 - Prob. 15.9PCh. 15.4 - Draw the structure of a triacylglycerol that fits...
Ch. 15.5 - Draw the products formed from hydrolysis of each...Ch. 15.5 - Prob. 15.12PCh. 15.6 - Draw the structure of two different cephalins...Ch. 15.6 - Classify each lipid as a triacylglycerol,...Ch. 15.7 - Why are phospholipids rather than triacylglycerols...Ch. 15.7 - Prob. 15.16PCh. 15.8 - Prob. 15.17PCh. 15.8 - Prob. 15.18PCh. 15.9 - Prob. 15.19PCh. 15.9 - Prob. 15.20PCh. 15.10 - Why is it much easier to overdose on a fat-soluble...Ch. 15.10 - Prob. 15.22PCh. 15 - Prob. 15.23UKCCh. 15 - Prob. 15.24UKCCh. 15 - Prob. 15.25UKCCh. 15 - What hydrolysis products are formed when the wax...Ch. 15 - Prob. 15.27UKCCh. 15 - Prob. 15.28UKCCh. 15 - Draw the products formed when the given...Ch. 15 - Prob. 15.30UKCCh. 15 - Prob. 15.31UKCCh. 15 - Prob. 15.32UKCCh. 15 - Prob. 15.33APCh. 15 - Label each compound as a hydrolyzable or...Ch. 15 - Prob. 15.35APCh. 15 - Prob. 15.36APCh. 15 - Prob. 15.37APCh. 15 - How does each of the following affect the melting...Ch. 15 - Rank the fatty acids in order of increasing...Ch. 15 - How would you expect the melting points of the...Ch. 15 - Prob. 15.41APCh. 15 - Why are soaps water soluble, but the fatty acids...Ch. 15 - Draw the structure of a wax formed from palmitic...Ch. 15 - Prob. 15.44APCh. 15 - Prob. 15.45APCh. 15 - Prob. 15.46APCh. 15 - Prob. 15.47APCh. 15 - What hydrolysis products are formed when each wax...Ch. 15 - Draw a triacylglycerol that fits each description:...Ch. 15 - Draw a triacylglycerol that fits each description:...Ch. 15 - Prob. 15.51APCh. 15 - Prob. 15.52APCh. 15 - Prob. 15.53APCh. 15 - Prob. 15.54APCh. 15 - Prob. 15.55APCh. 15 - Draw the products formed when the given...Ch. 15 - Prob. 15.57APCh. 15 - Prob. 15.58APCh. 15 - Prob. 15.59APCh. 15 - Prob. 15.60APCh. 15 - Prob. 15.61APCh. 15 - Why are LDLs soluble in the blood?Ch. 15 - Describe the role of HDLs and LDLs in cholesterol...Ch. 15 - Prob. 15.64APCh. 15 - Prob. 15.65APCh. 15 - Prob. 15.66APCh. 15 - Answer each question with regards to vitamins A...Ch. 15 - Answer each question in Problem 15.67 for vitamins...Ch. 15 - Prob. 15.69APCh. 15 - Prob. 15.70APCh. 15 - Prob. 15.71APCh. 15 - How are soaps and phosphoacylglycerols similar in...Ch. 15 - Some fish oils contain triacylglycerols formed...Ch. 15 - Some marine plankton contain triacylglycerols...Ch. 15 - Prob. 15.75APCh. 15 - Prob. 15.76APCh. 15 - Prob. 15.77APCh. 15 - Prob. 15.78APCh. 15 - Prob. 15.79CPCh. 15 - Prob. 15.80CP
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