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1

One-dimensional and comprehensive two-dimensional gas chromatography coupled to soft photo ionization time-of-flight mass spectrometry: A two- and three-dimensional separation approach

W. Welthagen, S. Mitschke, F. Mühlberger, R. Zimmermann

Journal:

Journal of Chromatography A

Year:

2007

Language:

english

File:

PDF, 1.33 MB

english, 2007

2

Depressed, not depressed or unsure: Prevalence and the relation to well-being across sectors in South Africa

Welthagen, Christa, Els, Crizelle

Journal:

SA Journal of Industrial Psychology

Year:

2012

Language:

english

File:

PDF, 597 KB

english, 2012

3

Application of comprehensive two-dimensional gas chromatography mass spectrometry and different types of data analysis for the investigation of cigarette particulate matter

Thomas Gröger, Werner Welthagen, Stefan Mitschke, Marion Schäffer, Ralf Zimmermann

Journal:

Journal of Separation Science

Year:

2008

Language:

english

File:

PDF, 4.54 MB

english, 2008

4

Comparison of ten media for the enumeration of yeasts in dairy products

J.J. Welthagen, B.C. Viljoen

Journal:

Food Research International

Year:

1997

Language:

english

File:

PDF, 613 KB

english, 1997

5

Application of direct thermal desorption gas chromatography and comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry for analysis of organic compounds in ambient aerosol particles

Jürgen Schnelle-Kreis, Werner Welthagen, Martin Sklorz, Ralf Zimmermann

Journal:

Journal of Separation Science

Year:

2005

Language:

english

File:

PDF, 1.72 MB

english, 2005

6

Photo-ionisation mass spectrometry as detection method for gas chromatography: Optical selectivity and multidimensional comprehensive separations

Ralf Zimmermann, Werner Welthagen, Thomas Gröger

Journal:

Journal of Chromatography A

Year:

2008

Language:

english

File:

PDF, 1.65 MB

english, 2008

7

Statistical methods for comparing comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry results: Metabolomic analysis of mouse tissue extracts

Robert A. Shellie, Werner Welthagen, Jitka Zrostliková, Joachim Spranger, Michael Ristow, Oliver Fiehn, Ralf Zimmermann

Journal:

Journal of Chromatography A

Year:

2005

Language:

english

File:

PDF, 368 KB

english, 2005

8

Comprehensive multidimensional separation methods by hyphenation of single-photon ionization time-of-flight mass spectrometry (SPI-TOF-MS) with GC and GC×GC

Markus S. Eschner, Werner Welthagen, Thomas M. Gröger, Marc Gonin, Katrin Fuhrer, Ralf Zimmermann

Journal:

Analytical and Bioanalytical Chemistry

Year:

2010

Language:

english

File:

PDF, 971 KB

english, 2010

9

An ultracompact photo-ionization time-of-flight mass spectrometer with a novel vacuum ultraviolet light source for on-line detection of organic trace compounds and as a detector for gas chromatography

Ralf Zimmermann, Fabian Mühlberger, Katrin Fuhrer, Marc Gonin, Werner Welthagen

Journal:

Journal of Material Cycles and Waste Management

Year:

2008

Language:

english

File:

PDF, 732 KB

english, 2008

10

Comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry (GC × GC-TOF) for high resolution metabolomics: biomarker discovery on spleen tissue extracts of obese NZO compared to lean C57BL/6 mice

Werner Welthagen, Robert A. Shellie, Joachim Spranger, Michael Ristow, Ralf Zimmermann, Oliver Fiehn

Journal:

Year:

2005

Language:

english

File:

PDF, 389 KB

english, 2005

11

Search criteria and rules for comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry analysis of airborne particulate matter

W Welthagen, J Schnelle-Kreis, R Zimmermann

Journal:

Journal of Chromatography A

Year:

2003

Language:

english

File:

PDF, 962 KB

english, 2003

12

The value of certain chemotaxonomic methods in the identification of food related yeasts

J.J Welthagen, B.C Viljoen

Journal:

Food Microbiology

Year:

1997

Language:

english

File:

PDF, 263 KB

english, 1997

13

The isolation and identification of yeasts obtained during the manufacture and ripening of Cheddar cheese

J.J. Welthagen, B.C. Viljoen

Journal:

Food Microbiology

Year:

1999

Language:

english

File:

PDF, 200 KB

english, 1999

14

Yeast profile in Gouda cheese during processing and ripening

Johan J Welthagen, Bennie C Viljoen

Journal:

International Journal of Food Microbiology

Year:

1998

Language:

english

File:

PDF, 78 KB

english, 1998

15

Group classification method for pm 2.5 aerosols analysed with Comprehensive two-dimensional gas chromatography (GCxGC TOF MS)

W. Welthagen, J. Schnelle-Kreis, R. Zimmermann

Journal:

Journal of Aerosol Science

Year:

2004

File:

PDF, 3.32 MB

2004

16

Comprehensive Gas Chromatography−Time-of-Flight Mass Spectrometry Using Soft and Selective Photoionization Techniques

Mitschke, Stefan, Welthagen, Werner, Zimmermann, Ralf

Journal:

Analytical Chemistry

Year:

2006

Language:

english

File:

PDF, 1.09 MB

english, 2006

17

Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1 H -imidazol-2-yl)-4-phenol microspheres

Abdul-quadir, M. S., van der Westhuizen, R., Welthagen, W., Ferg, E. E., Tshentu, Z. R., Ogunlaja, A. S.

Journal:

New Journal of Chemistry

Year:

2018

Language:

english

File:

PDF, 3.15 MB

english, 2018

18

Combined paediatric liver-kidney transplantation: Analysis of our experience and literature review

Strobele, Bernd, Loveland, Jerome, Britz, Russell, Gottlich, Errol, Welthagen, Anna, Botha, Jean

Journal:

South African Medical Journal

Year:

2013

Language:

english

File:

PDF, 144 KB

english, 2013

19

Factors determining clinical outcomes in intussusception in the developing world: Experience from Johannesburg, South Africa

Carapinha, C, Truter, M, Bentley, A, Welthagen, A, Loveland, J

Journal:

South African Medical Journal

Year:

2016

Language:

english

File:

PDF, 128 KB

english, 2016

20

Providing a primary care service for psychiatric in-patients

Welthagen, Enone, Talbot, Sarah, Harrison, Oliver, Phelan, Michael

Journal:

Psychiatric Bulletin

Year:

2004

Language:

english

File:

PDF, 61 KB

english, 2004

21

Comparing the Catalytic Activity of Silica-Supported Vanadium Oxides and the Polymer Nanofiber-Supported Oxidovanadium(IV) Complex toward Oxidation of Refractory Organosulfur Compounds in Hydrotreated Diesel

Dembaremba, Tendai O., van Der Westhuizen, Rina, Welthagen, Werner, Ferg, Ernst, Ogunlaja, Adeniyi S., Tshentu, Zenixole R.

Journal:

Year:

2019

Language:

english

File:

PDF, 1.52 MB

english, 2019

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