The Lewis structures of dipeptide alanine-isoleucine that shows the resonance structures of amides linkage has to be drawn Concept introduction: A dipeptide is a chain which is made up of two amino acids. The dipeptide alanine-isoleucine contains two amino acids namely alanine and isoleucine. Both of them consist of an α -amino group , an α -carboxylic acid group and a side chain of hydrocarbons.

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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

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Chapter 24, Problem 27GQ

Interpretation Introduction

Interpretation:

The Lewis structures of dipeptide alanine-isoleucine that shows the resonance structures of amides linkage has to be drawn

Concept introduction: A dipeptide is a chain which is made up of two amino acids. The dipeptide alanine-isoleucine contains two amino acids namely alanine and isoleucine. Both of them consist of an α-amino group, an α-carboxylic acid group and a side chain of hydrocarbons.

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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

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