Publications

Google Scholar

2019

74

“Synergy and antagonism in natural product extracts: when 1 + 1 does not equal 2.”
Caesar, L. K., & Cech, N. B. (2019).
Nat Prod Rep.
doi:10.1039/c9np00011a

73

“Apicidin Attenuates MRSA Virulence through Quorum-Sensing Inhibition and Enhanced Host Defense”
Parlet, C. P., Kavanaugh, J. S., Crosby, H. A., Raja, H. A., El-Elimat, T., Todd, D. A., . . . Horswill, A. R. (2019).
Cell Rep, 27(1), 187-198.e186.
doi:10.1016/j.celrep.2019.03.018

72

“Quorum sensing between bacterial species on the skin protects against epidermal injury and atopic dermatitis.”
Williams, M. R., Costa, S. K., Zaramela, L. S., Kahil, S., Daniel A. Todd, Heather L. Winter, Sanford, J. A., O’Neill, A. M., Liggins, M. C., Nakatsuji, T., Nadja B. Cech, Cheung, A. L., Zengler, K., Horswill, A. R., Gallo, R. L.
Science Translational Medicine, 11, pii: eaat8329.
doi: 10.1126/scitranslmed.aat8329

71

“Mapping the Fungal Battlefield: Using in situ Chemistry and Deletion Mutants to Monitor Interspecific Chemical Interactions Between Fungi.”
Sonja L. Knowles, Huzefa A. Raja, Wright, A. J., Lee, A. M., Lindsay K. Caesar, Nadja B. Cech, Mead, M. E., Steenwyk, J. L., Ries, L. N. A., Goldman, G. H., Rokas, A., Nicholas H. Oberlies.
Frontiers in Microbiology, 19, 10:285.
doi: 10.3389/fmicb.2019.00285

70

“MroQ is a Novel Abi-domain Protein That Influences Virulence Gene Expression in Staphylococcus aureus via Modulation of Agr Activity.”
Stephanie Marroquin, Brittney Gimza, Brooke Tomlinson, Michelle Stein, Andrew Frey, Rebecca A. Keogh, Rachel Zapf, Daniel A. Todd, Nadja B. Cech, Ronan K. Carroll, Lindsey N. Shaw.
Infection and Immunity, pii: IAI.00002-19.
doi: 10.1128/iai.00002-19

69

“Prenylated Diresorcinols Inhibit Bacterial Quorum Sensing.”
Paguigan, N. D.; Rivera-Chávez, J.; Stempin, J. J., Mario Augustinović, Noras, A. I., Huzefa A. Raja, Daniel A. Todd, Triplett, K. D.; Day, C.; Figueroa, M.; Hall, P. R., Nadja B. Cech, Nicholas H. Oberlies.
Journal of Natural Products, 82, 550-558.
PMID: 30730742; doi: 10.1021/acs.jnatprod.8b00925

68

“Opportunities and Limitations for Untargeted Mass Spectrometry Metabolomics to Identify Biologically Active Constituents in Complex Natural Product Mixtures.”
Lindsay K. Caesar, Joshua J. Kellogg, Olav M. Kvalheim, Nadja B. Cech.
Journal of Natural Products, 82, 469-484.
PMID: 30844279; doi: 10.1021/acs.jnatprod.9b00176

67

“Selection and Characterization of Botanical Natural Products for Research Studies: A NaPDI Center Recommended Approach.”
Joshua J. Kellogg, Mary F. Paine, Jeannine S. McCune, Nicholas H. Oberlies, Nadja B. Cech.
Nat. Prod. Rep., Advance Article
doi: 10.1039/C8NP00065D 

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2018

66

“Detection of adulteration in Hydrastis canadensis (goldenseal) dietary supplements via untargeted mass spectrometry-based metabolomics.”
Diane E. Wallace, Nicholas H. Oberlies, Nadja B. Cech, Joshua J. Kellogg.
Food Chem. Toxicol., 120, 439-447.
PMID: 30031041; doi: 10.1016/j.fct.2018.07.033

65

“Phytochemical Analysis and Antimicrobial Efficacy of Macleaya cordata against Extensively Drug-Resistant Staphylococcus aureus.”
Manead M. Khin,  Alan M. Jones, Nadja B. Cech, Lindsay K. Caesar.
Natural Products Communications,
13, 1479-1483.
doi: 10.1177/1934578X1801301117

64

“Analytical methods for the study of bioactive compounds from medicinally used Echinacea species.”
Bruni R., Brighenti V., Lindsay K. Caesar, Bertelli D., Nadja B. Cech, Pellati F.
Journal of Pharmaceutical and Biomedical Analysis, 160, 443-477.
PMID: 30142565; doi: 10.1016/j.jpba.2018.07.044

63

“Integration of biochemometrics and molecular networking to identify antimicrobials in Angelica keiskei.”
Lindsay K. Caesar, Joshua J. Kellogg, Olav M. Kvalheim, Cech, R. A., Nadja B. Cech.
Planta Med., 84, 721-728.
PMID: 29571174; doi: 10.1055/a-0590-5223

62

“Hierarchical cluster analysis of technical replicates to identify interferents in untargeted mass spectrometry metabolomics.”
Lindsay K. Caesar, Olav M. Kvalheim, Nadja B. Cech.
Analytica Chimica Acta., 1021, 69-77.
doi: 10.1016/j.aca.2018.03.013

61

“Identification of intestinal UDP-Glucoronosyltransferase inhibitors of green tea (Camellia sinensis) using a biochemometric approach.”
Tian, D. D., Joshua J. Kellogg, Okut, N.; Nicholas H. Oberlies, Nadja B. Cech, Shen, D. D.; McCune, J. S.; Paine, M. F.
Drug Metab. Dispos., 46, 552-560.
PMID: 29467215; doi: 10.1124/dmd.117.079491

60

“Mast cell degranulation and calcium influx are inhibited by an Echinacea purpurea extract and the alkylamide dodeca-2E,4E-dienoic acid isobutylamide.”
Gulledge, T. V., Colette, N. M., Mackey, E, Johnstone, S. E., Moazami, Y., Daniel A. Todd, Moeser, A. J.; Pierce, J. G., Nadja B. Cech, Laster, S. M.
J. Ethnopharmacol., 212, 166-174.
PMID: 29042288; doi: 10.1016/j.jep.2017.10.012

59

“Biochemometrics to identify synergists and additives from botanical medicines: A case study with Hydrastis canadensis (Goldenseal).”
Emily R. Britton, Joshua J. Kellogg, Kvalheim, O. M., Nadja B. Cech.
Journal of Natural Products, 81, 484-493.
PMID: 29091439; doi: 10.1021/acs.jnatprod.7b00654

 

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2017

58

“Coagulase-Negative Staphylococcal Strain Prevents Staphylococcus aureus Colonization and Skin Infection by Blocking Quorum Sensing.”
Paharik, A. E.; Parlet, C. P.; Chung, N., Daniel A. Todd, Rodriquez, E. L., Van Dyke, M. H., Nadja B. Cech, Horswill A. R.
Cell Host Microbe, 22(6), 746-756.
PMID: 29199097; doi: 10.1016/j.chom.2017.11.001

57

“Interspecific and intraspecific hybrid Epichloë species symbiotic with the North American native grass Poa alsodes.”
Shymanovich, T; Charlton, N. D.; Musso, A. M.; Scheerer, J; Nadja B. Cech, Stanley H. Faeth, Young, C. A.
Mycologia, 109(3), 457-474.
PMID: 28723242; doi: 10.1080/00275514.2017.1340779

56

“Conventional and accelerated-solvent extractions of green tea (Camellia sinensis) for metabolomics-based chemometrics.”
Joshua J. Kellogg, Diane E. Wallace, Tyler N. Graf, Nicholas H. Oberlies, Nadja B. Cech.
Journal of Pharmaceutical and Biomedical Analysis, 145, 604-610.
PMID: 28787673; doi: 10.1016/j.jpba.2017.07.027

55

“Signal Biosynthesis Inhibition with Ambuic Acid as a Strategy to Target Antibiotic-Resistant Infections.”
Daniel A. Todd, C. P. Parlet, H. A. Crosby, C. L. Malone, K. P. Heilmann, Alex R. Horswill, Nadja B. Cech.
Antimicrobial Agents and Chemotherapy, 61, pii: e00263-17.
PMID: 28607020; doi: 10.1128/AAC.00263-17

54

“Comparison of Metabolomics Approaches for Evaluating the Variability of Complex Botanical Preparations: Green Tea (Camellia sinensis) as a Case Study.”
Joshua J. Kellogg, Tyler N. Graf, Mary F. Paine, Jeannine S. McCune, Olav M. Kvalheim, Nicholas H. Oberlies, Nadja B. Cech.
Journal of natural products, 80 (5), 1457-1466.
PMID: 28453261; doi: 10.1021/acs.jnatprod.6b01156

53

“Secondary Metabolites from the leaves of goldenseal (Hydrastis canadensis).”
Martha Leyte-Lugo, Emily R. Britton, Daniel H. Foil, Adam R. Brown, Daniel A. Todd, Jose Rivera Chavez, Nicholas H. Oberlies, Nadja B. Cech.
Phytochemistry Letters, 20, 54-60.
 doi.org/10.1016/j.phytol.2017.03.012

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2016

52

qNMR for profiling the production of fungal secondary metabolites.
Wilson C. Brooks, Noemi D. Paguigan, Huzefa A. Raja, Franklin J. Moy, Nadja B. Cech, Cedric J. Pearce, Nicholas H. Oberlies.
Magnetic resonance in chemistry, 55, 670-676..
PMID: 28024162;  doi: 10.1002/mrc.4571

51

“Antimicrobial fungal endophytes from the botanical medicine goldenseal (Hydrastis canadensis).”
Joseph M. Egan, Amninder Kaur, Huzefa A. Raja, Joshua J. Kellogg, Nicholas H. Oberlies, Nadja B. Cech.
Phytochemistry Letters, 17, 219-225.
doi.org/10.1016/j.phytol.2016.07.031

50

“Secondary Metabolites from Fungal Endophytes of Echinacea purpurea Suppress Cytokine Secretion by Macrophage-Type Cells.”
Amninder Kaur, Martina Oberhofer, Monika Juzumaite, Huzefa A. Raja, Travis V. Gulledge, Diana Kao, Stanley H. Faeth, Scott M. Laster, Nicholas H. Oberlies, Nadja B. Cech.
Natural Product Communications, 11 (8), 1143-1146.
PMID: 28479944

49

“A Review of the Medicinal Uses and Pharmacology of Ashitaba.”
Lindsay K. Caesar, Nadja B. Cech.
Planta Medica, 82 (14), 1236-45
PMID: 27399234;  doi: 10.1055/s-0042-110496

48

“Hybrid Quadrupole-Orbitrap mass spectrometry for quantitative measurement of quorum sensing inhibition.”
Daniel A. Todd, David. B. Zich, Keivan. A. Ettefagh, Jeffrey. S. Kavanaugh, Alex R. Horswill, Nadja B. Cech.
Journal of Microbiological Methods, 127, 89-94.
PMID: 27237773;  doi: 10.1016/j.mimet.2016.05.024

47

“A validated UHPLC-tandem mass spectrometry method for quantitative analysis of flavonolignans in milk thistle (Silybum marianum) extracts.”
Tyler N. Graf, Nadja B. Cech, S. J. Polyak, Nicholas J. Oberlies.
Journal of Pharmaceutical and Biomedical Analysis, 126, 26-33.
PMID: 27136284;  doi: 10.1016/j.jpba.2016.04.028

46

“Biochemometrics for natural products research: Comparison of data analysis approaches and application to the identification of bioactive compounds.”
Joshua J. Kellogg, Daniel A. Todd, Joseph M. Egan, Huzefa A. Raja, Nicholas H. Oberlies, Olav M. Kvalheim, Nadja B. Cech.
Journal of Natural Products, 79 (2), 376-86
PMID: 26841051; doi: 10.1021/acs.jnatprod.5b01014

45

“Comparison of electrospray ionization and atmospheric pressure photoionization liquid chromatography mass spectrometry methods for analysis of ergot alkaloids from endophyte- infected sleepygrass (Achnatherum robustum).”
Alan K. Jarmusch, Ashley M. Musso, Tatsiana Shymanovich, Scott A. Jarmusch, Mary Beth E. Lovin, Brandie M. Ehrmann, Susanna Saari, David E. Nichols, Stanley H. Faeth, Nadja B. Cech.
Journal of Pharmaceutical and Biomedical Analysis, 117, 11-17.
PMID: 26340558; doi: 10.1016/j.jpba.2015.08.031

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2015

44

“A new mass spectrometry based bioassay for the direct assessment of hyaluronidase activity and inhibition.”
Emily R. Britton, Carolyn B, Ibberson, Alexander R. Horswill, Nadja B. Cech.
Journal of Microbiological Methods, 119, 163-167.
PMID: 26519769; doi: 10.1016/j.mimet.2015.10.019

43

“Cytokine-suppressive activity of a hydroxylated alkylamide from Echinacea purpurea.”
Martha Leyte-Luge, Daniel A. Todd, Tyler V. Gulledge, Emily R. Britton, Monika Juzumaite, Fred S. Carter, Scott M. Laster, Nadja B. Cech.
Planta Medica Letters, 2, e25-e27.
doi: 10.1055/s-0035-1557764

42

“ω-Hydroxyemodin limits Staphylococcus aureus quorum sensing-mediated pathogenesis and inflammation.”
Seth M. Daly, Barry O. Elmore, Jeffrey S. Kavanaugh, Kathleen D. Triplett, Mario Figueroa, Huzefa A. Raja, Tamam El-Elimat, Heidi A. Crosby, Jon K Femling, Nadja B. Cech, Alexander R. Horswill, Nicholas H. Oberlies, Pamela R. Hall.
Antimicrobial Agents and Chemotherapy, 59, 2223-2235.
PMID: 25645827; doi: 10.1128/AAC.04564-14

41

Echinacea purpurea extracts contain a mixture of cytokine-suppressive and cytokine-inducing compounds, including some that originate from endophytic bacteria.”
Daniel A. Todd, Tyler V. Gulledge, Emily R. Britton, Martina Oberhofer, Martha Leyte-Lugo, Ashley A. Moody, Tatsiana Shymanovich, Laura F. Grubbs, Monika Juzumaite, Tyler N. Graf, Nicholas H. Oberlies, Stanley H. Faeth, Scott M. Laster, Nadja B. Cech.
Plos One, 10(5).
PMID: 25933416; doi: 10.1371/journal.pone.0124276

40

“A mass spectrometry-based assay for improved quantitative measurements of efflux inhibition.”
Adam R. Brown, Keivan A. Ettefagh, Daniel A. Todd, Patrick S. Cole, Joseph M. Egan, Daniel H. Foil, Tyler N. Graf, Bryan D. Schindler, Glen W. Kaatz, Nadja B. Cech.
Plos One, 10(5).
PMID: 25961825; doi: 10.1371/journal.pone.0124814

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2014

39

“Comparison of the chemistry and diversity of endophytes isolated from wild-harvested and greenhouse-cultivated yerba mansa (Anemopsis californica).”
R. Owen Bussey III, Amninder Kaur, Daniel A. Todd, Joseph M. Egan, Tamam El-Elimat, Tyler N. Graf, Huzefa A. Raja, Nicholas H. Oberlies, Nadja B. Cech.
Phytochemistry Letters11, 202-208.
PMID: 25642298; doi:10.1016/j.phytol.2014.12.013

38

“Investigations of analyte-specific response saturation and dymanic range limitations in atmospheric pressure ionization mass spectrometry.”
Clint Alfaro, Agbo-Oma Uwakweh, Daniel A. Todd, Brandie M. Ehrmann, Nadja B. Cech.
Analytical Chemistry86, (21), 10639-10645.
PMID:25268329; doi: 10.1021/ac502984a

37

“Polyhydroxyanthraquinones as quorum sensing inhibitors from the guttates of Penicillium restrictum and their analysis by desorption electrospray ionization mass spectrometry.”
Mario Figueroa, Alan K. Jarmusch, Huzefa A. Raja, Tamam El-Elimat, Jeffrey S. Kavanaugh, Alexander R. Horswill, R. Graham Cooks, Nadja B. Cech, Nicholas H. Oberlies.
Journal of Natural Products77, 1351-1358.
PMID:24911880; doi: 10.1021/np5000704

36

“Staphylococcus epidermidis agr quorum-sensing system: Signal identification, cross talk, and importance in colonization.”
Michael E. Olson, Daniel A. Todd, Carolyn R. Schaeffer, Alexandra E. Paharik, Michael J. Van Dyke, Henning Buttner, Paul M. Dunham, Holger Rohde, Nadja B. Cech, Paul D. Fey, Nadja B. Cech, Alexander R. Horswill.
Journal of Bacteriology196, 3482-3493.
PMID:25070736; doi: 10.1128/JB.01882-14

35

“Identification of morphological and chemical markers of dry- and wet-season conditions in female Anopheles gambiae mosquitoes.”
Kaira M. Wagoner, Tovi Lehmann, Diana L. Huestis, Brandie M. Ehrmann, Nadja B. Cech, Gideon Wasserberg.
Parasites & Vectors7, 294.
PMID:24970701; doi: 10.1186/1756-3305-7-294

34

“Antimycobacterial furofuran lignans from the roots of Anemopsis californica.”
R. Owen Bussey III, Arlene A. Sy-Cordero, Mario Figueroa, Fred S. Carter, Joseph O. Falkinham III, Nicholas H. Oberlies, Nadja B. Cech.
Planta Medica80, 498-501.
PMID:24687738; doi: 10.1055/s-0034-1368352

33

“CodY-mediated regulation of the Staphylococcus aureus Agr system integrates nutritional and population density signals.”
Agnès Roux, Daniel A. Todd, Jose V. Velázquez, Nadja B. Cech, and Abraham L. Sonenshein.
Journal of Bacteriology, Epub ahead of print.
PMID:24391052; doi: 10.1128/JB.00128-13

32

“Flavonolignans from <em>Aspergillus iizukae</em>, a fungal endophyte of milk thistle (Silybum marianum).”
Tamam El-Elimat, Huzefa A. Raja, Tyler N. Graf, Stan H. Faeth, Nadja B. Cech, and Nicholas H. Oberlies.
Journal of Natural Products, Epub ahead of print.
PMID:24456525; doi: 10.1021/np400955q

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2013

31

“Small molecule quorum quenchers for prevention of Staphylococcus aureus infection.”
Nadja B. Cech and Alexander R. Horswill.
Future Microbiology, (Editorial), 8, 1-4
PMID:24266350; doi: 10.2217/fmb.13.134

30

“Strategies and pitfalls in the application of mass spectrometry to natural products research.”
Nadja B. Cech.
LC-GC31

29

“A high-resolution MS, MS/MS, and UV database of fungal secondary metabolites as a dereplication protocol for bioactive natural products.“
Tamam El-Elimat, Mario Figueroa, Brandie M. Ehrmann, Nadja B. Cech, Cedric Pearce, and Nicholas H. Oberlies.
Journal of Natural Products76, 1709-1716
PMID:23947912; doi: 10.1021/np4004307

28

“Rapid quantitation of furanocoumarins and flavonoids in grapefruit juice using ultra performance liquid chromatography.”
Karen M. Vandermolen, Nadja B. Cech, Mary F. Paine, and Nicholas H. Oberlies.
Phytochemistry24, 654-660
PMID:23780830; doi: 10.1002/pca.2449

27

“Quantitative analysis of autoinducing peptide I (AIP-I) from Staphylococcus aureus cultures using ultrahigh performance liquid chromatography – high resolving power mass spectrometry.”
Hiyas A. Junio, Daniel A. Todd, Keivan A. Ettefagh, Brandie M. Ehrmann, Jeffrey S. Kavanaugh, Alexander H. Horswill, and Nadja B. Cech.
Journal of Chromatography B930, 7-12
PMID:23703543; doi: 10.1016/j.jchromb.2013

26

“Sarothrin from Alkanna orientalis is an antimicrobial agent and efflux pump inhibitor.”
Jessica R. Bame, Tyler N. Graf, Hiyas A. Junio, R. Owen Bussey, Scott A. Jarmusch, Tamam El-Elimat, Joseph O. Falkinham, Nicholas H. Oberlies, Richard A. Cech, and Nadja B. Cech.
Planta Medica79, 327-329
PMID:23468310; doi: 10.1055/s-0032-1328259

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2012

25

“Quorum Quenching and Antimicrobial Activity of Goldenseal (Hydrastis canadensis) against Methicillin-Resistant Staphylococcus aureus (MRSA).”
Nadja B. Cech, Hiyas A. Junio, Laynez W. Ackermann, Jeffrey S. Kavanaugh, and Alexander H. Horswill.
Planta Medica, 2012, 78, 1556-1561

24

“Maplexins, new α-glucosidase inhibitors from red maple (Acer rubrum) stems.”
Chunpeng Wan, Tao Yuan, Vamsikrishna Kandhi, Nadja B. Cech, Mingyong Xie, and Navindra P. Seeram.
Bioorganic and Medicinal Chemistry Letters, 22, 567-600
PMID:22079755; doi: 10.1002/chin.201221211

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2011

23

“Phenolic glycosides from sugar maple (Acer saccharum) bark.”
Tao Yuan, Chunpeng Wan, Antonio Gonzalez-Sarrias, Vamsikrishna Kandhi, Nadja B. Cech, and Navindra P. Seeram.
Journal of Natural Products, 742472-2476
PMID:22032697; doi: 10.1021/np200543z

22

“Synergy Directed Fractionation of Botanical Medicines: A Case Study with Goldenseal (Hydrastis canadensis).”
Hiyas A. Junio, Arlene A. Sy-Cordero, Keivan A. Ettefagh, Johnna T. Burns, Kathryn T. Micko, Tyler N. Graf, Scott J. Richter, Robert E. Cannon, Nicholas H. Oberlies, and Nadja B. Cech.
Journal of Natural Products, 74, 1621-1629
PMCID:PMC3142294; doi: 10.1021/np200336g

21

“Inhibition of H1N1 influenza A virus growth and induction of inflammatory mediators by the isoquinoline alkaloid berberine and extracts of goldenseal (Hydrastis canadensis).”
Chad E. Cecil, Jeanine M. Davis, Nadja B. Cech, and Scott M. Laster.
Intertational Immunopharmacology, 11, 1706-1714
PMID:21683808; doi: 10.1016/j.intimp.2011.06.002

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2010

20

“Goldenseal (Hydrastis canadensis L.) extracts synergistically enhance the antibacterial activity of berberine via efflux pump inhibition.”
Keivan A. Ettefagh, Johnna T. Burns, Hiyas A. Junio, Glenn W. Kaatz, and Nadja B. Cech.
Planta Medica, 77, 835-840
PMCID: PMC3100400; doi: 10.1055/s-0030-1250606

19

“Echinacea and its alkylamides: effects on the influenza A-induced secretion of cytokines, chemokines, and PGE from RAW 264.7 macrophage-like cells.”
Nadja B. Cech, Vamsikrishna Kandhi, Jeanine M. Davis, Amy Hamilton, Dawn Eads, and Scott M. Laster.
Intertational Immunopharmacology, 10, 1268-1278
PMID: 21683808; doi: 10.1016/j.intimp.2010.07.009

18

“Selectivity in Electrospray Ionization Mass Spectrometry.”
Nadja B. Cech, and Christie G. Enke.
In: Electrospray and MALDI Mass Spectrometry, Ed. Cole, R.B. 2nd Edition, 49-73

17

“A Validated Liquid Chromatography/Electrospray Ionization-Mass Spectrometry (LC/ESI-MS) Method for Quantification of Spilanthol in Spilanthes acmella (L.) Murr.”
Stacy S. Bae, Brandie M. Ehrmann, Keivan A. Ettefagh, and Nadja B. Cech.
Phytochemical Analysis, 21, 438-443
PMID: 20310072; doi: 10.1002/pca.1215

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2009

16

“Comparison of alkylamide yield in ethanolic extracts prepared from fresh versus dry Echinacea purpurea utilizing HPLC-ESI-MS”
Kevin Spelman, Matthew Wetschler, and Nadja B. Cech.
Journal of Pharmaceutical and Biomedical Analysis, 49, 1141-1149
PMCID: PMC2745817; doi: 10.1016/j.jpba.2009.02.011

15

“Role for PPAR <gamma> in IL-2 inhibition in T cells by Echinacea-derived undeca-2E-ene-8,10- diynoic acid isobutylamide.”
Kevin Spelman, Katrina Liams-Hauser, Nadja B. Cech, Ethan Will Taylor, Nicholas Smirnoff, and Cynthia A. Wenner.
International Immunopharmacology, 91260-1264
PMID:19712756; doi: 10.1016/j.intimp.2009.08.009

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2008

14

“Relative Importance of Basicity in the Gas Phase and in Solution for Determining Responsiveness to Electrospray Ionization Mass Spectrometry.”
Brandie M. Ehrmann, Trina Henriksen, and Nadja B. Cech.
Journal of the American Society for Mass Spectrometry, 19719-728
PMID: 18325781; doi: 10.1016/j.jasms.2008.01.003

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2007

13

“Changes in floral color and anthocyanin production in Plantago lanceolata in response to temperature.”
Elizabeth A. Stiles, Nadja B. Cech, Stacy M. W. Dee, and Elizabeth P. Lacey.
Physiologia Plantarum, 129, 756-765

12

“Effects of Herbal Products and their constituents on Human Cytochrome P4502E1 Activity.”
Gregory M. Raner, Sean Cornelius, Kamalika Moulick, Yingqing Wang, Ashley M. Mortenson, Jonathan Hill, Connell Cunningham, and Nadja B. Cech.
Food and Chemical Toxicology, 45, 2359-2365
PMCID: PMC2955861; doi: 10.1016/j.fct.2007.06.012

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2006

11

“Echinacea alkylamides inhibit interleukin-2 production by Jurkat human T cells.”
Masa Sasagawa, Nadja B. Cech, Dean E. Gray, Gary W. Elmer, and Cynthia A. Wenner.
International Immunopharmacology, 61214-1221
PMID:16714226; doi: 10.1016/j.intimp.2006.02.003

10

“Liver enzyme-mediated oxidation of Echinacea purpurea alkylamides: Production of novel metabolites and changes in immunomodulatory activity.”
Nadja B. Cech, Katrina Tutor, Bethany A. Doty, Kevin Spelman, Masa Sasagawa, Gregory M. Raner, and Cynthia A. Wenner.
Planta Medica, 751372-1377
PMID: 17054047; doi: 10.1055/s-2006-951718

9

“Electrospray ionization mass spectrometry: How and when it works.”
Nadja B. Cech, and Christie G. Enke.
Encyclopedia of Mass Spectrometry, 8171-180

8

“High performance liquid chromatography/electrospray ionization mass spectrometry for simultaneous analysis of alkylamides and caffeic acid derivatives from Echinacea purpurea extracts.”
Nadja B. Cech, Maqueita S. Eleazer, Lawresa T. Shoffner, Amanda C. Davis, Mark R. Crosswhite, and Ashley M. Mortenson.
Journal of Chromatography A, 1103219-228
PMID: 16298376; doi: 10.1016/j.chroma.2005.11.008

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2005

7

“The relative influences of acidity and polarity on responsiveness of small organic molecules to analysis with negative ion electrospray ionization mass spectrometry (ESI-MS).”
Trina Henriksen, Renee K. Juhler, Bo Svensmark, and Nadja B. Cech.
Journal of the American Society for Mass Spectrometry, 16, 446-455
PMID: 15792713; doi: 10.1016/j.jasms.2004.11.021

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2002

6

“Practical implications of some recent studies in electrospray ionization fundamentals.”
Nadja B. Cech, and Christie G. Enke.
Mass Spectrometry Reviews, 20362-287
PMID: 11997944; doi: 10.1002/mas.10008

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2001

5

“Electrospray ionization detection of an inherently nonresponsive epoxide by peptide binding.”
Nadja B. Cech, Jennifer R. Krone, and Christie G. Enke.
Rapid Communications in Mass Spectrometry, 151040-1044
PMID:11404839; doi: 10.1002/rcm.337

4

“Predicting electrospray response from chromatographic retention time.”
Nadja B. Cech, Jennifer R. Krone, and Christie G. Enke.
Analytical Chemistry, 73, 208-213
PMID: 11199967; doi: 10.1021/ac0006019

3

“The effect of affinity for charged droplet surfaces on the fraction of analyte charged in the electrospray process.”
Nadja B. Cech, and Christie G. Enke.
Analytical Chemistry, 73, 4632-4639
PMID:11605841; doi: 10.1021/ac001267j

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2000

2

“Relating electrospray ionization response to non-polar character of small peptides.”
Nadja B. Cech, and Christie G. Enke.
Analytical Chemistry, 72, 2717-2723
PMID:10905298; doi: 10.1021/ac9914869

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1999

1

“Electrospray ionization mass spectrometric analysis of blood for differentiation of species.”
Edgard O. Espinoza, Nadja B. Cech, Kathy M. Gordon, Jessica Ekhoff, and Mark A. Kirms.
Analytical Biochemistry, 268, 252-261
PMID:10075815; doi: 10.1006/abio.1998.3048

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