PUBLICATIONS

 

1.       ESR Measurement of Quadrupole Coupling in N(SO3)=, D.M. Close and H.N. Rexroad, J. Chem. Phys. 50, 3717-3721 (1969).

 

2.       Ultraviolet Photobleaching of Free Radicals in γ‑Irradiated Amino Acids, D.M. Close and R.S. Anderson, Radiat. Res. 53, 349-357 (l973).

 

3.       Electron Spin Resonance of X‑Irradiated β‑Alanine, R.B. Lyons, D.M. Close, and R.S. Anderson, Chem.Phys. Lett. 20, 442-443 (1973).

 

4.       ESR of γ‑Irradiated Single Crystals of DL‑Threonine at Room Temperature, D.M. Close and R.S. Anderson,  J. Chem. Phys. 60, 2828-2832 (l974).

 

5.       ESR of x‑Irradiated Single Crystals of 3'‑Cytidylic Acid; H‑Abstraction From C5' of the Sugar Moiety, W.A. Bernhard, D.M. Close, K.R. Mercer, and J.C. Corelli,  Radiat. Res. 66, 19-32 (l976).

 

6.       A Stable Radical in the Ribose Moiety of X‑Irradiated 3'‑Cytidylic Acid at its Relation to a Similar Radical in Cytidine, An ESR‑ENDOR Study, W.A. Bernhard, J. Hüttermann, A. Müller, D.M. Close, and G.W. Fouse,  Radiat. Res. 68, 390-413 (l976).

 

7.       ESR and ENDOR Study of Single Crystals of L‑Asparagine X‑Irradiated at Room Temperature, D.M. Close, G.W. Fouse, and W.A. Bernhard,  J. Chem. Phys. 66, 1534-1540 (1977).

 

8.       ENDOR Study of the 3αH Radical in Deoxycytidine 5'‑Phosphate H2O, D.M. Close, G.W. Fouse, and W.A. Bernhard,  J. Chem. Phys. 66, 4689-4693 (l977).

 

9.       INDO Calculation of Spin Density Distribution in Pyrimidine Electron Adducts, D.M. Close and W.A. Bernhard,  J. Chem. Phys. 66, 5244-5245 (l977).

 

10.     The Alkoxy Radical RCH2O as a Free Radical Product in X‑Irradiated Single Crystals of Nucleosides, W.A. Bernhard, D.M. Close, J. Hüttermann, and H. Zehner,  J. Chem. Phys. 67, 1211-1219 (l977).

 

11.     ESR of X‑Irradiated Nucleic Acid Base Pairs:1‑MethylCytosine 5‑Fluorouracil at 300 K, D.M. Close, R.A. Farley, and W.A. Bernhard,  Radiat. Res. 73, 212-220 (l978).

 

12.     ESR and ENDOR Study of 5'‑dCMP at 6 K, D.M. Close and W.A. Bernhard,  J. Chem. Phys. 70, 210-215 (l979).

 

13.     ESR and ENDOR Study of X‑Irradiated Single Crystals of β‑Alanine at Room Temperature, D.M. Close, G.W. Fouse, W.A. Bernhard, and R.S. Andersen,  J. Chem. Phys. 70, 2131-2137 (1979).


14.     Alternating Linewidth Effects in the ESR Spectrum of 5,6‑Dihydro-6‑Methyluracil, D.M. Close, R.V. Lloyd, and W.A. Bernhard,  J. Chem. Phys. 72, 2203-2205 (l980).

 

15.     Low Temperature Intrinsic Defects in X‑Irradiated Hydroxyapatite Synthetic Single Crystals, D.M. Close, O.R. Gilliam, and M.M. Mengeot,  J. Chem. Phys. 74, 5497-5503 (l981).

 

16.     Low Temperature Thermoluminescent Behavior of 5'‑dCMP Single Crystals, D.W. Cooke and D.M. Close,  J. Chem. Phys. 76, 2174-2178 (1982).

 

17.     An ESR Study of Irradiated 1:1 Co‑Crystals of 9‑Ethyladenine 5,5'‑Diethyl‑Barbituric Acid (barbital) at 295 K, E. Sagstuen and D.M. Close,  J. Chem. Phys. 79, 117-122 (1983).

 

18.     ESR Study of Irradiated Single Crystals of the Co‑Crystalline Complex of Cyti-dine:Salicylic Acid, D.M. Close and E. Sagstuen,  J. Chem. Phys. 79, 5292-5300 (1983).

 

19.     Radiation Chemistry of Purines in the Solid State: ESR and ENDOR Studies of X‑Irradiated Xanthosine Dihydrate Single Crystals, W.H. Nelson and D.M. Close,  J. Chem. Phys. 79, 3240-3250 (1983).

 

20.     ESR Study of the Guanine Cation, D.M. Close, E. Sagstuen, and W.H. Nelson,  J. Chem. Phys. 82, 4386-4388 (1985).

 

21.     ESR and ENDOR of Irradiated Solids of Biological Significance, D.M. Close,  Mag. Reson. Rev. 11, 41-80 (1986).

 

22.     EPR and ENDOR Study of X‑irradiated Single Crystals of Purines at 4.2 K, D.M. Close, W. H. Nelson, and E. Sagstuen.  Chapter in the book Electronic Magnetic Resonance of the Solid State, J. Weil, ed., Sept., 1987, (p. 237-250).

 

23.     ESR and ENDOR Study of the Guanine Cation: Secondary Product in 5'‑dGMP, E.O. Hole, W.H. Nelson, D.M. Close, and E. Sagstuen,  J. Chem. Phys. 86, 5218-5219 (1987).

 

24.     Free Radicals Trapped in Methyl α‑D‑Mannopyranoside X‑Irradiated at 77 K. An ESR/ENDOR Study, W.A. Bernhard, J. Hüttermann, D.M. Close, and K.R. Mercer, Radiat. Res. 112, 54-61 (1987).

 

25.     Radical Formation in X‑Irradiated Single Crystals of Guanine Hydrochloride Monohydrate. Part II. ESR and ENDOR in the Range 10‑77 K,  D.M. Close, W.H. Nelson, and E. Sagstuen,  Radiat. Res. 112, 283-301 (1987).

 

26.     ESR/ENDOR Study of Guanosine 5'‑Monophosphate (Free Acid) Single Crystals X‑Irradiated at 10 K, E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close,  Radiat. Res. 116, 196-209 (1988).

 

 


27.     Radical Formation in X‑Irradiated Single Crystals of Guanine Hydrochloride Monohydrate. Part III. Secondary Radicals and Reaction Mechanisms, D.M. Close, E. Sagstuen, and W.H. Nelson,  Radiat. Res. 116, 379-392 (1988).

 

28.     ESR and ENDOR of Irradiated Solids of Biological Significance, D.M. Close,  Mag. Reson. Rev. 14, 1-47 (1988).

 

29.     ESR/ENDOR Study of Guanine:HCl:2H2O X‑Irradiated at 20 K, W.H. Nelson, E.O. Hole, E. Sagstuen, and D.M. Close,  Int. J. Radiat. Biol. 54, 963-986 (1988).

 

30.     ESR and ENDOR Study of Adenosine Single Crystals X‑Irradiated at 10 K, D.M. Close, and W.H. Nelson,  Radiat. Res. 117, 367-378 (1989).

 

31.     ESR and ENDOR Studies of X‑Irradiated Single Crystals of Guanine Derivatives, D.M. Close, W.H. Nelson, E. Sagstuen, and E.O. Hole,  Free Rad. Res. Commun. 6, 83-85 (1989).

 

32.     Free Radical Formation in Single Crystals of 2'-Deoxyguanosine-5'-Monophosphate and Guanine HydroBromide Monohydrate after X-Irradiation at 10 K and 65 K: An ESR, ENDOR and FSE Study, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close,  Free Rad. Res. Commun. 6, 87-90 (1989).

 

33.     Radiation Chemistry of Adenine Derivatives Following Direct Ionization in Solids: ESR and ENDOR Investigations, W.H. Nelson, D.M. Close, E. Sagstuen, and E.O. Hole,  Free Rad. Res. Commun. 6, 81-82 (1989).

 

34.     Free Radical Formation in Nucleosides and Nucleotides of Guanine: ESR and ENDOR of Guanosine 5'-Monophosphate and Guanosine:Dimethylformamide X-Irradiated at 10 K, E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close,  Free Rad. Res. Commun. 6, 91-92 (1989).

 

35.     Structure of the Primary Reduction Product of Thymidine after X-Irradiation at 10 K, E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close,  J. Phys. Chem. 93, 5974-5977 (1989).

 

36.     Environmental Effects on Primary Radical Formation in Guanine: Solid-State ESR and ENDOR of Guanine Hydrobromide Monohydrate, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close.  Radiat. Res. 125, 119-128 (1991).

 

37.     Primary and Secondary Radicals in Thymine Derivatives: Solid State ESR/ENDOR Study of 1-Methylthymine and Thymidine, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close,  Early Effects of Radiation on DNA, NATO ASI Series Vol. H 54, pp. 215-230, Springer Verlag, Heidelberg 1991.

 

 


38.     The Effects of Environment Upon DNA Free Radicals, E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close, Early Effects of Radiation on DNA. NATO ASI Series Vol. H 54, pp. 215-230, Springer Verlag, Heidelberg 1991.

 

39.     Molecular Orbital Calculations on DNA Base Pairs, D.M. Close, Early Effects of Radiation on DNA. NATO ASI Series Vol. H 54, pp. 155-156, Springer Verlag, Heidelberg 1991.

 

40.     Primary Reduction and Oxidation of Thymine Derivatives. ESR/ ENDOR of Thymidine and 1-Methylthymine X-Irradiated at 10 K, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close,  J. Phys. Chem. 95, 1494-1503 (1991).

 

41.     ESR and ENDOR of Irradiated Solids of Biological Interest, D.M. Close,  Mag. Reson. Rev. 15, 240-284 (1991).

 

42.     Free Radical Formation in Single Crystals of 2'-Deoxyguanosine 5'-Monophosphate Tetrahydrate Disodium Salt: An ESR/ENDOR Study, E.O. Hole, W.H. Nelson E. Sagstuen, and D.M. Close.  Radiat. Res. 129, 119-138 (1992).

 

43.     Ab Initio Molecular Orbital Calculations of DNA Bases and Their Radical Ions in Various Protonation States: Evidence for Proton Transfer in GC Base Pair Radical Anions, A.-O. Colson, B. Besler, D.M. Close, and M.D. Sevilla,  J. Phys. Chem. 96, 661-668 (1992).

 

44.     Free Radical Formation in X-Irradiated Anhydrous Crystals of Inosine Studied by EPR and ENDOR Spectroscopy, E.O. Hole, W.H. Nelson, E. Sagstuen, and D.M. Close, Radiat. Res. 130 148-159 (1992).

 

45.     Radiation Induced Free Radical Formation in Thymine Derivatives. EPR/ENDOR of Anhydrous Thymine Single Crystals X-Irradiated at 10 K,  E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close.  J. Phys. Chem. 96, 1121-1126 (1992).

 

46.     The Structure of the Guanine Cation: ESR/ENDOR of Cyclic Guanosine Monophosphate Single Crystals after X-Irradiation at 10 K, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close,  Radiat. Res. 129, 1-10 (1992).

 

47.     Organic Radicals in Solids, D.M. Close.  Chapter in the book, Electron Spin Resonance 13A, Specialist Periodical Reports, M.C.R. Symons ed., Royal Soc. Chem., London. (1992).

 

 

48.     On the Proton Transfer Behavior of the Primary Oxidation Product in Irradiated DNA, W.H. Nelson, E. Sagstuen, E.O. Hole, and D.M. Close,  Radiat. Res. 131, 10-17 (1992).

 

49.     Ionization of Adenine Derivatives: EPR and ENDOR Studies of X-Irradiated Adenine:HCl/2H2O and Adenine:HCl, W.H. Nelson, E. Sagstuen, E.O. Hole, and D.M. Close,          Radiat. Res. 131, 272-284 (1992).


50.     The Protonation State of Radiation Produced Cytosine Anions and Cations in the Solid State. EPR/ENDOR of Cytosine Monohydrate Single Crystals X-Irradiated at 10 K, E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close,  J. Phys. Chem. 96, 8269-8276 (1992).

 

51.     Radical Ions and Their Reactions in DNA Constituents.  ESR/ENDOR Studies of Radiation Damage in the Solid-State. D.M. Close.  Radiat. Res. 135, 1-15 (1993).

 

52.     ESR and ENDOR Study of Single Crystals of Deoxyadenosine Monohydrate X-Irradiated at 10 K, D.M. Close, W.H. Nelson, E. Sagstuen, and E.O. Hole.  Radiat. Res. 137, 300-309 (1994).

 

53.     Solid State Radiation Chemistry of Co-Crystalline DNA Base Pairs Studied with EPR and ENDOR, W.H. Nelson, S. Nimmala, D.M. Close, E.O. Hole and E. Sagstuen, Radiation Damage in DNA, Structure/Function Relationships at Early Times, pp. 97-103, A.F. Fuciarelli and J.D. Zimbrick, eds. Battelle Press, Ohio 1995.

 

54.     Protonation/Deprotonation Processes of Primary Products in X-Irradiated Cytosine Derivatives: EPR and ENDOR Studies at 10 K, E.O. Hole, E. Sagstuen, D.M. Close and W.H. Nelson, Radiation Damage in DNA, Structure/Function Relationships at Early Times, pp. 105-110, A.F. Fuciarelli and J.D. Zimbrick, eds. Battelle Press, Ohio 1995.

 

55.     ESR and ENDOR Studies of X-Irradiated Single Crystals of Deoxycytidine 5'-Phosphate Monohydrate (5'dCMP) at 10 K, D.M. Close, W.H. Nelson, E.O. Hole, E. Sagstuen and W.A. Bernhard, Radiation Damage in DNA, Structure/Function Relationships at EarlyTimes, pp. 121-127, A.F. Fuciarelli and J.D. Zimbrick, eds. Battelle Press, Ohio 1995.

 

56.     Free Radical Formation in Single Crystals of 9-Methyladenine X-Irradiated at 10 K. An Electron Paramagnetic Resonance and Electron Nuclear Double Resonance Study, E.O. Hole, E. Sagstuen, W.H. Nelson and D.M. Close. Radiat. Res. 144, 258-265 (1995).

 

57.     Radiation Damage to DNA Base Pairs. I. Electron Paramagnetic Resonance and Electron Nuclear Double Resonance Study of Single Crystals of the Complex 1-Methylthymine-9-Methyladenine X-Irradiated at 10 K. E. Sagstuen, E.O. Hole, W.H. Nelson, and D.M. Close. Radiat. Res. 146, 425-435 (1996).

 

58.     Where are the Sugar Radicals in Irradiated DNA?  D.M. Close,  Radiat. Res. 147, 663-673 (1997).

 

59.     Sugar Radical Conformations in A-DNA, D. M. Close. Radiat. Res. 148, 512-513, (1997).

 

60.     Electron Spin Resonance and Electron Nuclear Double Resonance Study of X-Irradiated Deoxyadenosine: Proton Transfer Behavior of Primary Ionic Radicals, W.H. Nelson, E. Sagstuen, E.O. Hole and D.M. Close, Radiat. Res. 149, 75-86 (1998).

 

 


61.     Electron Paramagnetic Resonance and Electron Nuclear Double Resonance Studies of X-Irradiated Crystals of Cytosine Hydrochloride. Part I. Free Radical Formation at 10 K Following High Radiation Dose, E.O. Hole, W.H. Nelson, E. Sagstuen and D.M, Close, Radiat. Res.149, 109-119 (1998).

 

62.     Radiation Damage to DNA Base Pairs. II. Paramagnetic Resonance Studies of 1-Methyl-uracil 9-Ethyladenine Complex Crystals X-Irradiated at 10 K, E. Sagstuen, E.O. Hole,W.H. Nelson and D.M. Close, Radiat. Res. 149, 75-86 (1998).

 

63.     EPR and ENDOR Studies of X-Irradiated Single Crystals of Deoxycytidine 5-Phosphate Monohydrate at 10 K., D.M. Close, E.O. Hole, W.H. Nelson and E. Sagstuen,  J. Phys. Chem.A, 102, 6737-6744 (1998).

 

64.     Comment on Effects of Ionizing Radiation on Crystalline Cytosine Monohydrates, D.M. Close, E. Sagstuen, E.O. Hole, and W.H. Nelson,  J. Phys. Chem. B, 103, 3049-3050 (1999).

 

65.   Free Radical Formation in X-Irradiated Crystals of 2'-Deoxycytidine Hydrochloride. Electron Magnetic Resonance Studies at 10 K, E.O. Hole, E. Sagstuen, W.H. Nelson, and D.M. Close, Radiat. Res. 153, 823-834 (2000).

 

66.   Experimental and Theoretical Investigation of the Mechanism of Radiation-Induced Radical Formation in Hydrogen Bonded Cocrystals of 1-Methylcytosine and 5-Fluorouracil, D.M. Close, L.A. Eriksson, E.O. Hole, E. Sagstuen, and W.H. Nelson, J. Phys. Chem.  B, 104, 9343-9350 (2000).

 

67.    Model Calculations of Radiation Induced Damage in 1-Methylthymine:9-methyladenine,Y. Chen, D.M. Close, J. Molec. Struct. (Theochem) 549, 55-61 (2001).

 

68.    Comment on “A Fourier Transform EPR Study of Uracil and Thymine Radical Anions in Aqueous Solution”, D. M. Close, Phys. Chem. Chem. Phys. 4, 43-44 (2002).

 

69.    Reductive Damage in Directly Ionized DNA: Saturation of the C5=C6 Bond of Cytosine in d(CGCG)2 Crystals, M.J. Debije, D.M. Close, W.A. Bernhard, Radiat.

         Res.  157, 235-242 (2002).

 

70.     Model Calculations of Radiation Induced Damage in 1-MethylUracil:9-EthylAdenine,Y. Chen, D.M. Close, Structural Chemistry 13, 203 (2002).

 

71.    Model Calculations of Radiation Induced Damage in Thymine Derivatives, D.M. Close, G. Forde, L. Gorb, J. Leszcynski, Structural Chemistry 14, 451 (2003).

 

72.   Model Calculations of Radiation Induced Damage in DNA Constituents Using Density Functional Theory, D. M. Close, Chapter 5 in Computational Chemistry, Review of Current Trends, Vol. 8, J. Leszcynski ed., World Scientific, New Jersey,  p. 209 (2003).


 

73.    Oxidative Damage to Cytosine: Implications for the Study of Radiation Induced Damage for   the Study of Radiation-Induced Damage to DNA, D. M. Close, J. Phys. Chem. B, 107, 864 (2003).    

 

74.    DNA Damage Dictates the Biological Consequences of Ionizing Irradiation: the Chemical Pathways, W.A. Bernhard and D.M. Close, Chapter 15 in “Charged Particle and Photon Interactions with Matter: Chemical, Physicochemical, and Biological Consequences with Applications”, A. Mozumber and Y. Hatano, eds.  Marcell Dekker, NY,     p. 431-470 (2003).

 

75.   Ab Initio Ionization Energy Thresholds of DNA and RNA Bases in Gas Phase and in Aqueous Solution, C.E. Crespo-Hernandez, R. Arce, Y. Ishikawa, L. Gorb, J. Leszczynski and D.M.            Close, J. Phys. Chem. A, 108, 6373-6377 (2004).

 

76.    Calculation of the Ionization Potentials of the DNA Bases in Aqueous Medium, D.M. Close, J. Phys. Chem. A, 108, 10376-10379 (2004).

 

 

77.   The Influence of Microhydration on the Ionization Energy Thresholds of Uracil and Thymine. David M. Close, Carlos E. Crespo-Hernandez, L. Gorb, J. Leszczynski submitted to the J  Phys. Chem. A, 109, 9279-9283 (2005).

 

78.   The Influence of Microhydration on the Ionization Energy Thresholds of Thymine: Comparisions of Theoretical Calculations with Experimental Values,  David M. Close, Carlos  E. Crespo-Hernandez, L. Gorb, J. Leszczynski,  J. Phys. Chem. A. 110, 7485-7490 (2006).

 

79.   Electron Transfer in Amino Acid-Nucleic Acid Base Complexes: EPR, ENDOR and DFT Study of X-Irradiated N-Formylglycine-Cytosine Complex Crystals, E. Sagstuen, D.M.  Close, R. Vagane, E.O. Hole.  J. Phys. Chem. A 110, 8653-62 (2006).

 

80.   Alkyl Radical Adducts of Aromatic N-Oxides as Hydrogen-abstracting agents: The Reactivity of Phenazine-N,N’-dioxide-methyl Radical Adduct, Y. Razkazovskiy and D.M. Close, Res. Chem. Intermed, 32, 625-635 (2006).

 

81.    On the Determination of Redox Potentials for the Watson-Crick Base Pairs, DNA Nucleosides, and Relevant Nucleoside Analogs, Carlos E. Crespo-Hernandez, David M. Close,  L. Gorb, J. Leszczynski, J. Phys. Chem. B 111, 5386-5395 (2007)

 

82.     From the Primary Radiation Induced Radicals in DNA Constituents to Strand Breaks: Low Temperature EPR/ENDOR Studies, D. M. Close. Chapter in the book “Radiation Induced Molecular Phenomena in Nucleic Acids, J. Leszczynski and M. Shukla, eds, Springer 2008.

 

83.     Theoretical Elucidation of Conflicting Experimental Data on Vertical Ionization Potentials of Microhydrated Thymine, D.M. Close, C. E. Crespo-Hernández, Leonid Gorb, and Jerzy Leszczynski, Selected as a High Impact Letter to J. Phys. Chem. 2008, 112, 4405-4409.