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Showing 1 to 12 of 242 entries
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Parameterization of phosphine ligands reveals mechanistic pathways and predicts reaction outcomes.

Nature chemistry

Niemeyer ZL, Milo A, Hickey DP, Sigman MS.
PMID: 27219707
Nat Chem. 2016 Jun;8(6):610-7. doi: 10.1038/nchem.2501. Epub 2016 May 16.

The mechanistic foundation behind the identity of a phosphine ligand that best promotes a desired reaction outcome is often non-intuitive, and thus has been addressed in numerous experimental and theoretical studies. In this work, multivariate correlations of reaction outcomes...

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Niemeyer ZL, Milo A, Hickey DP, et al. Parameterization of phosphine ligands reveals mechanistic pathways and predicts reaction outcomes. Nat Chem. 2016;8(6):610-7doi: 10.1038/nchem.2501.
Niemeyer, Z. L., Milo, A., Hickey, D. P., & Sigman, M. S. (2016). Parameterization of phosphine ligands reveals mechanistic pathways and predicts reaction outcomes. Nature chemistry, 8(6), 610-7. https://doi.org/10.1038/nchem.2501
Niemeyer, Zachary L, et al. "Parameterization of phosphine ligands reveals mechanistic pathways and predicts reaction outcomes." Nature chemistry vol. 8,6 (2016): 610-7. doi: https://doi.org/10.1038/nchem.2501
Niemeyer ZL, Milo A, Hickey DP, Sigman MS. Parameterization of phosphine ligands reveals mechanistic pathways and predicts reaction outcomes. Nat Chem. 2016 Jun;8(6):610-7. doi: 10.1038/nchem.2501. Epub 2016 May 16. PMID: 27219707.
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Hierarchical cluster analysis of ignitable liquids based on the total ion spectrum.

Journal of forensic sciences

Waddell EE, Frisch-Daiello JL, Williams MR, Sigman ME.
PMID: 24962674
J Forensic Sci. 2014 Sep;59(5):1198-204. doi: 10.1111/1556-4029.12517. Epub 2014 Jun 24.

Gas chromatography-mass spectrometry (GC-MS) data of ignitable liquids in the Ignitable Liquids Reference Collection (ILRC) database were processed to obtain 445 total ion spectra (TIS), that is, average mass spectra across the chromatographic profile. Hierarchical cluster analysis, an unsupervised...

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Waddell EE, Frisch-Daiello JL, Williams MR, et al. Hierarchical cluster analysis of ignitable liquids based on the total ion spectrum. J Forensic Sci. 2014;59(5):1198-204doi: 10.1111/1556-4029.12517.
Waddell, E. E., Frisch-Daiello, J. L., Williams, M. R., & Sigman, M. E. (2014). Hierarchical cluster analysis of ignitable liquids based on the total ion spectrum. Journal of forensic sciences, 59(5), 1198-204. https://doi.org/10.1111/1556-4029.12517
Waddell, Erin E, et al. "Hierarchical cluster analysis of ignitable liquids based on the total ion spectrum." Journal of forensic sciences vol. 59,5 (2014): 1198-204. doi: https://doi.org/10.1111/1556-4029.12517
Waddell EE, Frisch-Daiello JL, Williams MR, Sigman ME. Hierarchical cluster analysis of ignitable liquids based on the total ion spectrum. J Forensic Sci. 2014 Sep;59(5):1198-204. doi: 10.1111/1556-4029.12517. Epub 2014 Jun 24. PMID: 24962674.
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Multinuclear Magnetic Resonance Investigation of Crystalline Alkali Molybdates.

Inorganic chemistry

Wren JE, Greer BJ, Michaelis VK, Higman CS, Kroeker S.
PMID: 26436608
Inorg Chem. 2015 Oct 19;54(20):9853-61. doi: 10.1021/acs.inorgchem.5b01556. Epub 2015 Oct 05.

A variety of crystalline alkali molybdate phases are characterized by (23)Na, (133)Cs, and (95)Mo magic-angle-spinning nuclear magnetic resonance (MAS NMR) to provide spectroscopic handles for studies of devitrification products in borosilicate nuclear waste glasses. The NMR parameters obtained from...

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Wren JE, Greer BJ, Michaelis VK, et al. Multinuclear Magnetic Resonance Investigation of Crystalline Alkali Molybdates. Inorg Chem. 2015;54(20):9853-61doi: 10.1021/acs.inorgchem.5b01556.
Wren, J. E., Greer, B. J., Michaelis, V. K., Higman, C. S., & Kroeker, S. (2015). Multinuclear Magnetic Resonance Investigation of Crystalline Alkali Molybdates. Inorganic chemistry, 54(20), 9853-61. https://doi.org/10.1021/acs.inorgchem.5b01556
Wren, John E C, et al. "Multinuclear Magnetic Resonance Investigation of Crystalline Alkali Molybdates." Inorganic chemistry vol. 54,20 (2015): 9853-61. doi: https://doi.org/10.1021/acs.inorgchem.5b01556
Wren JE, Greer BJ, Michaelis VK, Higman CS, Kroeker S. Multinuclear Magnetic Resonance Investigation of Crystalline Alkali Molybdates. Inorg Chem. 2015 Oct 19;54(20):9853-61. doi: 10.1021/acs.inorgchem.5b01556. Epub 2015 Oct 05. PMID: 26436608.
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The music of morality and logic.

Frontiers in psychology

Mesz B, Rodriguez Zivic PH, Cecchi GA, Sigman M, Trevisan MA.
PMID: 26191020
Front Psychol. 2015 Jul 01;6:908. doi: 10.3389/fpsyg.2015.00908. eCollection 2015.

Musical theory has built on the premise that musical structures can refer to something different from themselves (Nattiez and Abbate, 1990). The aim of this work is to statistically corroborate the intuitions of musical thinkers and practitioners starting at...

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Mesz B, Rodriguez Zivic PH, Cecchi GA, et al. The music of morality and logic. Front Psychol. 2015;6:908doi: 10.3389/fpsyg.2015.00908.
Mesz, B., Rodriguez Zivic, P. H., Cecchi, G. A., Sigman, M., & Trevisan, M. A. (2015). The music of morality and logic. Frontiers in psychology, 6908. https://doi.org/10.3389/fpsyg.2015.00908
Mesz, Bruno, et al. "The music of morality and logic." Frontiers in psychology vol. 6 (2015): 908. doi: https://doi.org/10.3389/fpsyg.2015.00908
Mesz B, Rodriguez Zivic PH, Cecchi GA, Sigman M, Trevisan MA. The music of morality and logic. Front Psychol. 2015 Jul 01;6:908. doi: 10.3389/fpsyg.2015.00908. eCollection 2015. PMID: 26191020; PMCID: PMC4486752.
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Organic chemistry. A data-intensive approach to mechanistic elucidation applied to chiral anion catalysis.

Science (New York, N.Y.)

Milo A, Neel AJ, Toste FD, Sigman MS.
PMID: 25678656
Science. 2015 Feb 13;347(6223):737-43. doi: 10.1126/science.1261043.

Knowledge of chemical reaction mechanisms can facilitate catalyst optimization, but extracting that knowledge from a complex system is often challenging. Here, we present a data-intensive method for deriving and then predictively applying a mechanistic model of an enantioselective organic...

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Milo A, Neel AJ, Toste FD, et al. Organic chemistry. A data-intensive approach to mechanistic elucidation applied to chiral anion catalysis. Science. 2015;347(6223):737-43doi: 10.1126/science.1261043.
Milo, A., Neel, A. J., Toste, F. D., & Sigman, M. S. (2015). Organic chemistry. A data-intensive approach to mechanistic elucidation applied to chiral anion catalysis. Science (New York, N.Y.), 347(6223), 737-43. https://doi.org/10.1126/science.1261043
Milo, Anat, et al. "Organic chemistry. A data-intensive approach to mechanistic elucidation applied to chiral anion catalysis." Science (New York, N.Y.) vol. 347,6223 (2015): 737-43. doi: https://doi.org/10.1126/science.1261043
Milo A, Neel AJ, Toste FD, Sigman MS. Organic chemistry. A data-intensive approach to mechanistic elucidation applied to chiral anion catalysis. Science. 2015 Feb 13;347(6223):737-43. doi: 10.1126/science.1261043. PMID: 25678656; PMCID: PMC4465137.
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Detection limits for GC/MS analysis of organic explosives.

Journal of forensic sciences

Sigman ME, Ma CY.
PMID: 11210925
J Forensic Sci. 2001 Jan;46(1):6-11.

Method detection limits are determined and compared for analysis of liquid injections of organic explosives and related compounds by gas chromatography-mass spectroscopy utilizing electron impact (EI), negative ion chemical ionization (NICI), and positive ion chemical ionization (PICI) detection methods....

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Sigman ME, Ma CY. Detection limits for GC/MS analysis of organic explosives. J Forensic Sci. 2001;46(1):6-11
Sigman, M. E., & Ma, C. Y. (2001). Detection limits for GC/MS analysis of organic explosives. Journal of forensic sciences, 46(1), 6-11.
Sigman, M E, and Ma, C Y. "Detection limits for GC/MS analysis of organic explosives." Journal of forensic sciences vol. 46,1 (2001): 6-11.
Sigman ME, Ma CY. Detection limits for GC/MS analysis of organic explosives. J Forensic Sci. 2001 Jan;46(1):6-11. PMID: 11210925.
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Southward migration of the intertropical convergence zone through the Holocene.

Science (New York, N.Y.)

Haug GH, Hughen KA, Sigman DM, Peterson LC, Röhl U.
PMID: 11509727
Science. 2001 Aug 17;293(5533):1304-8. doi: 10.1126/science.1059725.

Titanium and iron concentration data from the anoxic Cariaco Basin, off the Venezuelan coast, can be used to infer variations in the hydrological cycle over northern South America during the past 14,000 years with subdecadal resolution. Following a dry...

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Haug GH, Hughen KA, Sigman DM, et al. Southward migration of the intertropical convergence zone through the Holocene. Science. 2001;293(5533):1304-8doi: 10.1126/science.1059725.
Haug, G. H., Hughen, K. A., Sigman, D. M., Peterson, L. C., & Röhl, U. (2001). Southward migration of the intertropical convergence zone through the Holocene. Science (New York, N.Y.), 293(5533), 1304-8. https://doi.org/10.1126/science.1059725
Haug, G H, et al. "Southward migration of the intertropical convergence zone through the Holocene." Science (New York, N.Y.) vol. 293,5533 (2001): 1304-8. doi: https://doi.org/10.1126/science.1059725
Haug GH, Hughen KA, Sigman DM, Peterson LC, Röhl U. Southward migration of the intertropical convergence zone through the Holocene. Science. 2001 Aug 17;293(5533):1304-8. doi: 10.1126/science.1059725. PMID: 11509727.
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Chemical Nuclease Activity of 1,10-Phenanthroline-Copper. Isotopic Probes of Mechanism.

Inorganic chemistry

Zelenko O, Gallagher J, Xu Y, Sigman DS.
PMID: 11670375
Inorg Chem. 1998 May 04;37(9):2198-2204. doi: 10.1021/ic971154r.

The chemical nuclease 1,10-phenanthroline-copper cleaves DNA by oxidative attack on the deoxyribose moiety yielding 3'- and 5'-phosphomonoesters, free purine and pyrimidine, and 5-methylenefuranone as stable products. Kinetic isotope effects associated with deuterium substitution have been measured in an attempt...

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Zelenko O, Gallagher J, Xu Y, et al. Chemical Nuclease Activity of 1,10-Phenanthroline-Copper. Isotopic Probes of Mechanism. Inorg Chem. 1998;37(9):2198-2204doi: 10.1021/ic971154r.
Zelenko, O., Gallagher, J., Xu, Y., & Sigman, D. S. (1998). Chemical Nuclease Activity of 1,10-Phenanthroline-Copper. Isotopic Probes of Mechanism. Inorganic chemistry, 37(9), 2198-2204. https://doi.org/10.1021/ic971154r
Zelenko, Ottilie, et al. "Chemical Nuclease Activity of 1,10-Phenanthroline-Copper. Isotopic Probes of Mechanism." Inorganic chemistry vol. 37,9 (1998): 2198-2204. doi: https://doi.org/10.1021/ic971154r
Zelenko O, Gallagher J, Xu Y, Sigman DS. Chemical Nuclease Activity of 1,10-Phenanthroline-Copper. Isotopic Probes of Mechanism. Inorg Chem. 1998 May 04;37(9):2198-2204. doi: 10.1021/ic971154r. PMID: 11670375.
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Liquid chromatography/mass spectrometric analysis of explosives: RDX adduct ions.

Rapid communications in mass spectrometry : RCM

Gapeev A, Sigman M, Yinon J.
PMID: 12717767
Rapid Commun Mass Spectrom. 2003;17(9):943-8. doi: 10.1002/rcm.1006.

In liquid chromatography/mass spectrometry (LC/MS) of 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), attachment of an anion to the analyte molecule is the major way of producing characteristic ions under electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) conditions. The formation of RDX...

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Gapeev A, Sigman M, Yinon J. Liquid chromatography/mass spectrometric analysis of explosives: RDX adduct ions. Rapid Commun Mass Spectrom. 2003;17(9):943-8doi: 10.1002/rcm.1006.
Gapeev, A., Sigman, M., & Yinon, J. (2003). Liquid chromatography/mass spectrometric analysis of explosives: RDX adduct ions. Rapid communications in mass spectrometry : RCM, 17(9), 943-8. https://doi.org/10.1002/rcm.1006
Gapeev, Alexei, et al. "Liquid chromatography/mass spectrometric analysis of explosives: RDX adduct ions." Rapid communications in mass spectrometry : RCM vol. 17,9 (2003): 943-8. doi: https://doi.org/10.1002/rcm.1006
Gapeev A, Sigman M, Yinon J. Liquid chromatography/mass spectrometric analysis of explosives: RDX adduct ions. Rapid Commun Mass Spectrom. 2003;17(9):943-8. doi: 10.1002/rcm.1006. PMID: 12717767.
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Modular synthesis of amine-functionalized oxazolines.

Organic letters

Rajaram S, Sigman MS.
PMID: 12323028
Org Lett. 2002 Oct 03;4(20):3399-401. doi: 10.1021/ol0264758.

Substituted oxazoline amines have been prepared in high yield from beta-amino alcohols and Fmoc-protected alpha-amino acids using CCl(4), PPh(3), and Hünig's base in a one-pot procedure followed by base-mediated deprotection. [reaction: see text]

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Rajaram S, Sigman MS. Modular synthesis of amine-functionalized oxazolines. Org Lett. 2002;4(20):3399-401doi: 10.1021/ol0264758.
Rajaram, S., & Sigman, M. S. (2002). Modular synthesis of amine-functionalized oxazolines. Organic letters, 4(20), 3399-401. https://doi.org/10.1021/ol0264758
Rajaram, Sridhar, and Sigman, Matthew S. "Modular synthesis of amine-functionalized oxazolines." Organic letters vol. 4,20 (2002): 3399-401. doi: https://doi.org/10.1021/ol0264758
Rajaram S, Sigman MS. Modular synthesis of amine-functionalized oxazolines. Org Lett. 2002 Oct 03;4(20):3399-401. doi: 10.1021/ol0264758. PMID: 12323028.
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Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O.

Analytical chemistry

Kaiser J, Hastings MG, Houlton BZ, Röckmann T, Sigman DM.
PMID: 17222025
Anal Chem. 2007 Jan 15;79(2):599-607. doi: 10.1021/ac061022s.

Interaction with ozone transfers its anomalous (non-mass-dependent) 17O enrichment to atmospheric nitrogen oxides and nitrate. The 17O anomaly (Delta17O) in nitrate can be used to identify atmospheric nitrate inputs into terrestrial and aquatic environments as well as to study...

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Kaiser J, Hastings MG, Houlton BZ, et al. Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O. Anal Chem. 2007;79(2):599-607doi: 10.1021/ac061022s.
Kaiser, J., Hastings, M. G., Houlton, B. Z., Röckmann, T., & Sigman, D. M. (2007). Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O. Analytical chemistry, 79(2), 599-607. https://doi.org/10.1021/ac061022s
Kaiser, Jan, et al. "Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O." Analytical chemistry vol. 79,2 (2007): 599-607. doi: https://doi.org/10.1021/ac061022s
Kaiser J, Hastings MG, Houlton BZ, Röckmann T, Sigman DM. Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O. Anal Chem. 2007 Jan 15;79(2):599-607. doi: 10.1021/ac061022s. PMID: 17222025.
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Glacial/interglacial changes in subarctic north pacific stratification.

Science (New York, N.Y.)

Jaccard SL, Haug GH, Sigman DM, Pedersen TF, Thierstein HR, Röhl U.
PMID: 15890879
Science. 2005 May 13;308(5724):1003-6. doi: 10.1126/science.1108696.

Since the first evidence of low algal productivity during ice ages in the Antarctic Zone of the Southern Ocean was discovered, there has been debate as to whether it was associated with increased polar ocean stratification or with sea-ice...

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Jaccard SL, Haug GH, Sigman DM, et al. Glacial/interglacial changes in subarctic north pacific stratification. Science. 2005;308(5724):1003-6doi: 10.1126/science.1108696.
Jaccard, S. L., Haug, G. H., Sigman, D. M., Pedersen, T. F., Thierstein, H. R., & Röhl, U. (2005). Glacial/interglacial changes in subarctic north pacific stratification. Science (New York, N.Y.), 308(5724), 1003-6. https://doi.org/10.1126/science.1108696
Jaccard, S L, et al. "Glacial/interglacial changes in subarctic north pacific stratification." Science (New York, N.Y.) vol. 308,5724 (2005): 1003-6. doi: https://doi.org/10.1126/science.1108696
Jaccard SL, Haug GH, Sigman DM, Pedersen TF, Thierstein HR, Röhl U. Glacial/interglacial changes in subarctic north pacific stratification. Science. 2005 May 13;308(5724):1003-6. doi: 10.1126/science.1108696. PMID: 15890879.
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Showing 1 to 12 of 242 entries