Call number:
AWI G6-18-91505
Type of Medium:
Dissertations
Pages:
146 S.
,
Ill., graph. Darst.
Language:
English
Note:
Groningen, Univ., Diss., 1983
,
CONTENTS:
INTRODUCTION. -
CHAPTER 1. ANALYTICAL AND PREPARATIVE TECHNIQUES. -
1.1. Introduction. -
1.2. Isotope mass spectrometry of H, O and C. -
1.2.1. 2H analysis of H2. -
1.2.2. 18O and 13C analysis of CO2. -
1.3. Preparation of H2 from H2O and organic compounds. -
1.3.1. Combustion and reduction system. -
1.3.1.1. Automated vacuum taps. -
1.3.1.2. Automated cold trap. -
1.3.1.3. Automated combustion. -
1.3.1,4, Membrane pump. -
1.3.2. Performance and results. -
1.3.2.1. H2O samples. -
1.3.2.1. Organic samples. -
1.4. Preparation of CO2 from H2O and organic compounds. -
1.4.1. Introduction. -
1.4.2. Review of the available methods for extracting oxygen. -
1.4.3. Sealed nickel tube pyrolysis. -
1.4.3.1. Principle. -
1.4.3.2. Realization. -
1.4.3.3. Technical details. -
1.4.3.4. Results and calibration. -
1.4.3.5. 18O analysis of some organic pounds
1.4.3.5. δ2H of hydrogen produced by the SNTP method. -
1.5. Preparation of carbon dioxide for 13C analysis. -
1.6. Separation of cellulose from wood and peat. -
1.6.1. Introduction. -
1.6.2. Separation of cellulose from wood. -
1.6.3. Separation of cellulose from peat. -
1.6.4 Nitration and drying of cellulose. -
CHAPTER 2. 18O FRACTIONATION BETWEEN CO2 AND H2O. -
2.1. Introduction. -
2.2. 18O analysis of H2O. -
2.3. Equilibration with CO2. -
2.4. Mass spectrometric analyses. -
2.5. Results anddiscussion. -
CHAPTER 3. FACTORS AFFECTING THE 2H/1H AND 18O/16O RATIO OF PLANT CELLULOSE. -
3.1. Survey of factors affecting the 2H/1H and 18O/16O ratio. -
3.2. Isotopic composition of precipitation. -
3.3. Leaf-water isotopic enrichment. -
3.3.1. Theoretical. -
3.3.2. Measurement of leaf-water enrichment. -
3.3.2.1. Trees. -
3.3.2.2. Bog plants. -
3.4. Biochemical fractionation. -
CHAPTER 4. 2H, 18O AND 13C VARIATIONS IN TREE RINGS. -
4.1. Introduction. -
4.2. Methods and material. -
4.3. Results and discussion. -
4.3.1. Intra-ring variations. -
4.3.1.1. Late wood. -
4.3.1.2. Differences between early wood and late wood. -
4.3.2. Inter-ring variations. -
CHAPTER 5. 2H, 18O AND 13C VARIATIONS IN PEAT. -
5.1. Introduction. -
5.2. δ2H, δ18O and δ13C values of bog plants. -
5.2.1. Material and method. -
5.2.2. δ18O and δ2H. -
5.2.3. δ13C
5.3. Engbertsdijksveen I. -
5.3. Introduction. -
5.3.2. Description of the local vegetational succession. -
5.3.3. Cellulose preparation. -
5.3.4. The δ2H and δ18O record. -
5.4. Engbertsdijksveen VII. -
5.4.1. Introduction. -
5.4.2. Description of the local vegetational succession. -
5.4.3. The δ2H and δ18O record. -
5.4.4. The δ13C record. -
5.5. Comparison between Engbertsdijksveen I and VII. -
5.6. Conclusions. -
Appendix. -
REFERENCES. -
SUMMARY. -
SAMENVATTING. -
ACKNOWLEDGEMENTS.
Location:
AWI Reading room
Branch Library:
AWI Library
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