I= STUDIES ON THE STRUCTURE OF Β-CHITIN AND OTHER POLYSACCHARIDES
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Title of Thesis
STUDIES ON THE STRUCTURE OF Β-CHITIN AND OTHER POLYSACCHARIDES

Author(s)
Naheed Akhtar
Institute/University/Department Details
Department of Biochemistry/ University of Karachi
Session
1987
Subject
Biochemistry
Number of Pages
155
Keywords (Extracted from title, table of contents and abstract of thesis)
β-chitin, polysaccharides, glucopyranose ring, peptide group

Abstract
No Abstract

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2647.7 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents
61.62 KB
2 1 Introduction 1
419.46 KB
3 2 Structure Factors For Earlier Model Structure 18
200.21 KB
  2.1 Structure Factors Calculations For Β-Chitin 18
  2.2 Calculation Of Intensities For Composition Reflections 21
  2.3 Comparison Of Earlier Structure 22
  2.4 Conclusion 23
4 3 Determination Of Coordinates Of Β-Chitin And Calculation Of Structure Factor /R- Value For Modified Models 24
508.87 KB
  3.1 Determination Of Coordinates Of The Glucopyranose Ring 24
  3.2 Determination Of Coordinates Of Peptide Group 28
  3.3 Determination Of Coordinates Of 0 6 Atom. 30
  3.4 Calculation Of Structure Factors For R.B System 34
  3.5 Changes Of Structure Factors And R-Value After Modification Of The R-B Model 35
  3.6 Conclusion 40
5 4 Difference Fourier Synthesis Maps For Β- Chitin 42
109.31 KB
  4.1 Expression For Difference Synthesis 42
  4.2 Computation Of Difference Fourier Synthesis For 0 10 Projection 43
  4.3 Difference Synthesis Map (R-B Model) 44
  4.4 Difference Synthesis Maps At Various Positions Of 06 Atom 45
  4.5 Difference Synthesis Map After Trial & Error Method 45
  4.6 Conclusion 45
6 5 Refinement Of The Molecular Chain Of Β-Chitin By Least Square Method 47
336.16 KB
  5.1 Mathematical Analysis Of The Refinement 48
  5.2 Rate Of Change Of Structure Factors With Respect To Parameters 52
  5.3 Rate Of Change With Respect To A And B Parts 53
  5.4 Calculations Of ( Δ X i/ Δ Pm , Δy i / Δ Pm, Δz i / Δpm ) For Each Parameter 54
  5.5 Computation Of Δu Values 62
  5.6 Initial Stage Of Refinement And Development Of Programs 62
  5.7 Difference Synthesis Maps After Least Square Refinement 63
  5.8 Conclusion 65
7 6 Discussion 66
155.55 KB
8 7 Historical Introduction (Triple Helical Structure Of Β-D-1 ,3 Xy1an) 71
219.22 KB
9 8 Structure Factor Calculations For Earlier Model Structure 79
964.05 KB
  8.1 Method Of Calculation 79
  8.2 Calculations Of Rate Of Change Of Structure Factors With Respect To Parameters 82
  8.3 Results 94
  8.4 Discussion 94
  8.5 Appendix 97a
  8.6 Appendix 97b
10 9 References 151
67.05 KB