Search Results - "Torgrip, Ralf J. O"

correspondence problem for metabonomics datasets by Åberg, K. Magnus, Alm, Erik, Torgrip, Ralf J. O

“…In metabonomics it is difficult to tell which peak is which in datasets with many samples. This is known as the correspondence problem. Data from different…”
Get full text

Feature detection and alignment of hyphenated chromatographic-mass spectrometric data Extraction of pure ion chromatograms using Kalman tracking by MAGNUS ABERG, K, TORGRIP, Ralf J. O, KOLMERT, Johan, SCHUPPE-KOISTINEN, Ina, LINDBERG, Johan

“…In this paper we present a new method, called TracMass, for analyzing data obtained using hyphenated chromatography-mass spectrometry (XC/MS). The method uses…”
Get full text

Second-Order Peak Detection for Multicomponent High-Resolution LC/MS Data by Stolt, Ragnar, Torgrip, Ralf J. O., Lindberg, Johan, Csenki, Leonard, Kolmert, Johan, Schuppe-Koistinen, Ina, Jacobsson, Sven P.

“…The first step when analyzing multicomponent LC/MS data from complex samples such as biofluid metabolic profiles is to separate the data into information and…”
Get full text

A solution to the 1D NMR alignment problem using an extended generalized fuzzy Hough transform and mode support by Alm, Erik, Torgrip, Ralf J. O., Åberg, K. Magnus, Schuppe-Koistinen, Ina, Lindberg, Johan

“…This paper approaches the problem of intersample peak correspondence in the context of later applying statistical data analysis techniques to 1D 1 H-nuclear…”
Get full text

Vibrational overtone combination spectroscopy (VOCSY)--a new way of using IR and NIR data by Alm, Erik, Bro, Rasmus, Engelsen, Søren B, Karlberg, Bo, Torgrip, Ralf J. O

“…This work explores a novel method for rearranging 1st order (one-way) infra-red (IR) and/or near infra-red (NIR) ordinary spectra into a representation…”
Get full text

Time-resolved biomarker discovery in ¹H-NMR data using generalized fuzzy Hough transform alignment and parallel factor analysis by Alm, Erik, Torgrip, Ralf J. O, Åberg, K. Magnus, Schuppe-Koistinen, Ina, Lindberg, Johan

“…This work addresses the subject of time-series analysis of comprehensive ¹H-NMR data of biological origin. One of the problems with toxicological and efficacy…”
Get full text

Massifquant: open-source Kalman filter-based XC-MS isotope trace feature detection by Conley, Christopher J, Smith, Rob, Torgrip, Ralf J O, Taylor, Ryan M, Tautenhahn, Ralf, Prince, John T

“…Isotope trace (IT) detection is a fundamental step for liquid or gas chromatography mass spectrometry (XC-MS) data analysis that faces a multitude of technical…”
Get full text

Proof of principle of a generalized fuzzy Hough transform approach to peak alignment of one-dimensional ¹H NMR data by Csenki, Leonard, Alm, Erik, Torgrip, Ralf J. O, Åberg, K. Magnus, Nord, Lars I, Schuppe-Koistinen, Ina, Lindberg, Johan

“…In metabolic profiling, multivariate data analysis techniques are used to interpret one-dimensional (1D) ¹H NMR data. Multivariate data analysis techniques…”
Get full text

Extensions to peak alignment using reduced set mapping: classification of LC/UV data from peptide mapping by Magnus Åberg, K., Torgrip, Ralf J. O., Jacobsson, Sven P.

“…Peak alignment using reduced set mapping (PARS) is extended with a new baseline approximation and a new dendrogram alignment scheme, which is designed to avoid…”
Get full text

A comparison of methods for alignment of NMR peaks in the context of cluster analysis by Forshed, Jenny, Torgrip, Ralf J.O., Åberg, K. Magnus, Karlberg, Bo, Lindberg, Johan, Jacobsson, Sven P.

“…This paper compares the performance of two recently developed algorithms and methods for peak alignment of first-order NMR data of complex biological samples…”
Get full text

Peak alignment using reduced set mapping by Torgrip, Ralf J. O., Åberg, Magnus, Karlberg, Bo, Jacobsson, Sven P.

“…This paper presents an algorithm and method for peak alignment or spectral synchronization of first‐ order data with pronounced differences between baseline…”
Get full text

Rapid X-ray based determination of moisture-, ash content and heating value of three biofuel assortments by Torgrip, Ralf J.O., Fernández–Cano, Víctor

“…Here we demonstrate a new hyphenated X–ray method, qDXA–XRF, for the simultaneous determination of moisture–, ash content and heating value (as received) of…”
Get full text

Proof of principle of a generalized fuzzy Hough transform approach to peak alignment of one-dimensional H NMR data by Csenki, Leonard, Alm, Erik, Torgrip, Ralf J O, Aberg, K Magnus, Nord, Lars I, Schuppe-Koistinen, Ina, Lindberg, Johan

“…In metabolic profiling, multivariate data analysis techniques are used to interpret one-dimensional (1D) H NMR data. Multivariate data analysis techniques…”
Get full text

The correspondence problem for metabonomics datasets: Young Investigators in Analytical and Bioanalytical Science by ABERG, K. Magnus, ALM, Erik, TORGRIP, Ralf J. O

Get full text

Time-resolved biomarker discovery in H-NMR data using generalized fuzzy Hough transform alignment and parallel factor analysis by Alm, Erik, Torgrip, Ralf J O, Aberg, K Magnus, Schuppe-Koistinen, Ina, Lindberg, Johan

Get full text

Time-resolved biomarker discovery inH-NMR data using generalized fuzzy Hough transform alignment and parallel factor analysis by Alm, Erik, Torgrip, Ralf J. O., Åberg, K. Magnus, Schuppe-Koistinen, Ina, Lindberg, Johan

“…This work addresses the subject of time-series analysis of comprehensive 1 H-NMR data of biological origin. One of the problems with toxicological and efficacy…”
Get full text

A comparison of methods for alignment of NMR peaks in the context of cluster analysis: Quantitative NMR Spectroscopy: principles and applications by FORSHED, Jenny, TORGRIP, Ralf J. O, ABERG, K. Magnus, KARLBERG, Bo, LINDBERG, Johan, JACOBSSON, Sven P

Get full text