Skip to content

Home Search Authors Pakistan News Saved

SciRah

SciRah does not host or store research papers. Results come live from free, official scholarly APIs, and every paper links back to its original source.

Data sources

OpenAlex
Semantic Scholar
Crossref
CORE
arXiv
PubMed

Privacy policy Terms of service

O. Kvalheim · SciRah

Researcher profile · Semantic Scholar

O. Kvalheim

Share profile

O. Kvalheim — researcher profile on SciRah

h-index: 44
Works: 191
Citations: 7,692

Most-cited papers

Multivariate data analysis in pharmaceutics: a tutorial review.
T. Rajalahti, O. Kvalheim
2011International journal of pharmaceutics566 citations
Semantic Scholar
Biomarker discovery in mass spectral profiles by means of selectivity ratio plot
T. Rajalahti, R. Arneberg, F. Berven, K. Myhr +2 more
2009271 citations
Semantic Scholar
Discriminating variable test and selectivity ratio plot: quantitative tools for interpretation and variable (biomarker) selection in complex spectral or chromatographic profiles.
T. Rajalahti, R. Arneberg, A. Kroksveen, M. Berle +2 more
2009Analytical Chemistry225 citations
Semantic Scholar
Effects of physical activity on schoolchildren's academic performance: The Active Smarter Kids (ASK) cluster-randomized controlled trial.
G. K. Resaland, E. Aadland, V. F. Moe, K. Aadland +16 more
2016Preventive Medicine175 citations Open access
Semantic Scholar
Biochemometrics for Natural Products Research: Comparison of Data Analysis Approaches and Application to Identification of Bioactive Compounds
J. Kellogg, D. Todd, Joseph M. Egan, H. Raja +3 more
2016Journal of Natural Products166 citations Open access
Semantic Scholar
Screening of biomarkers in rat urine using LC/electrospray ionization-MS and two-way data analysis.
Helena Idborg-Björkman, P. Edlund, O. Kvalheim, I. Schuppe-Koistinen +1 more
2003Analytical Chemistry143 citations
Semantic Scholar
GRANADA consensus on analytical approaches to assess associations with accelerometer-determined physical behaviours (physical activity, sedentary behaviour and sleep) in epidemiological studies
J. Migueles, E. Aadland, L. Andersen, J. Brønd +10 more
2021British Journal of Sports Medicine127 citations Open access
Semantic Scholar
Active Smarter Kids (ASK): Rationale and design of a cluster-randomized controlled trial investigating the effects of daily physical activity on children’s academic performance and risk factors for non-communicable diseases
G. K. Resaland, V. F. Moe, E. Aadland, J. Steene-Johannessen +5 more
2015BMC Public Health91 citations Open access
Semantic Scholar
The multivariate physical activity signature associated with metabolic health in children
E. Aadland, O. Kvalheim, S. Anderssen, G. K. Resaland +1 more
2018International Journal of Behavioral Nutrition and Physical Activity88 citations Open access
Semantic Scholar
Opportunities and Limitations for Untargeted Mass Spectrometry Metabolomics to Identify Biologically Active Constituents in Complex Natural Product Mixtures
Lindsay K. Caesar, J. Kellogg, O. Kvalheim, N. Cech
2019Journal of Natural Products83 citations Open access
Semantic Scholar
Biochemometrics to Identify Synergists and Additives from Botanical Medicines: A Case Study with Hydrastis canadensis (Goldenseal)
Emily R. Britton, J. Kellogg, O. Kvalheim, N. Cech
2017Journal of Natural Products77 citations Open access
Semantic Scholar
Hierarchical Cluster Analysis of Technical Replicates to Identify Interferents in Untargeted Mass Spectrometry Metabolomics
Lindsay K. Caesar, O. Kvalheim, N. Cech
2018Analytica Chimica Acta71 citations Open access
Semantic Scholar
Associations of volumes and patterns of physical activity with metabolic health in children: A multivariate pattern analysis approach.
E. Aadland, L. B. Andersen, S. Anderssen, G. K. Resaland +1 more
2018Preventive Medicine63 citations Open access
Semantic Scholar
The morphological score and its application to chemical rank determination
Hai-Lin Shen, Laila Stordrange, R. Manne, O. Kvalheim +1 more
200063 citations
Semantic Scholar
Comparison of Metabolomics Approaches for Evaluating the Variability of Complex Botanical Preparations: Green Tea (Camellia sinensis) as a Case Study
J. Kellogg, T. Graf, M. Paine, J. McCune +3 more
2017Journal of Natural Products62 citations Open access
Semantic Scholar
Pre‐analytical influence on the low molecular weight cerebrospinal fluid proteome
F. Berven, Ann C. Kroksveen, M. Berle, T. Rajalahti +6 more
2007PROTEOMICS - Clinical Applications62 citations
Semantic Scholar
Chromatographic profiling and multivariate analysis for screening and quantifying the contributions from individual components to the bioactive signature in natural products
O. Kvalheim, Hoi-yan Chan, I. Benzie, Y. Szeto +3 more
201161 citations Open access
Semantic Scholar
Recipe for uncovering the bioactive components in herbal medicine.
F. Chau, Hoi-yan Chan, C. Cheung, Cheng-Jian Xu +2 more
2009Analytical Chemistry61 citations Open access
Semantic Scholar
Toxicological evaluation of complex mixtures by pattern recognition: correlating chemical fingerprints to mutagenicity.
I. Eide, G. Neverdal, B. Thorvaldsen, B. Grung +1 more
2002Environmental Health Perspectives59 citations Open access
Semantic Scholar
Multicollinear physical activity accelerometry data and associations to cardiometabolic health: challenges, pitfalls, and potential solutions
E. Aadland, O. Kvalheim, S. Anderssen, G. K. Resaland +1 more
2019International Journal of Behavioral Nutrition and Physical Activity46 citations Open access
Semantic Scholar
Integration of Biochemometrics and Molecular Networking to Identify Bioactive Constituents of Ashitaba (Angelica keiskei Koidzumi)
Lindsay K. Caesar, J. Kellogg, O. Kvalheim, Richard A. Cech +1 more
2018Planta Medica46 citations Open access
Semantic Scholar
Uncorrelated linear discriminant analysis (ULDA): A powerful tool for exploration of metabolomics data
Da-Lin Yuan, Yi-Zeng Liang, Lun-Zhao Yi, Qing-Song Xu +1 more
200844 citations
Semantic Scholar
Feasibility study of NIR for surveillance of a pharmaceutical process, including a study of different preprocessing techniques
Laila Stordrange, Fred Olav Libnau, D. Malthe-Sørenssen, O. Kvalheim
200244 citations
Semantic Scholar
Accelerometer epoch setting is decisive for associations between physical activity and metabolic health in children
E. Aadland, L. Andersen, S. Anderssen, G. K. Resaland +1 more
2019Jurnal sport science43 citations Open access
Semantic Scholar
A multivariate approach to reveal biomarker signatures for disease classification: application to mass spectral profiles of cerebrospinal fluid from patients with multiple sclerosis.
T. Rajalahti, A. Kroksveen, R. Arneberg, F. Berven +3 more
2010Journal of Proteome Research42 citations Open access
Semantic Scholar
Pretreatment of mass spectral profiles: application to proteomic data.
R. Arneberg, T. Rajalahti, K. Flikka, F. Berven +6 more
2007Analytical Chemistry41 citations
Semantic Scholar
Quantitative Determination of Asphaltenes and Resins in Solution by Means of Near-Infrared Spectroscopy. Correlations to Emulsion Stability.
H. Kallevik, O. Kvalheim, J. Sjöblom
2000Journal of Colloid and Interface Science41 citations
Semantic Scholar
A method for validation of reference sets in SIMCA modelling
G. R. Flåten, B. Grung, O. Kvalheim
200439 citations
Semantic Scholar
Determination of chemical rank of two-way data from mixtures using subspace comparisons
Hai-Lin Shen, Yi-Zeng Liang, O. Kvalheim, R. Manne
200036 citations
Semantic Scholar
Study of the Self-Association of Alcohols by Near-Infrared Spectroscopy and Multivariate 2D Techniques
Laila Stordrange, A. Christy, O. Kvalheim, Hai-Lin Shen +1 more
200235 citations
Semantic Scholar
Resolution of two-way data: theoretical background and practical problem-solving Part 1: Theoretical background and methodology
Yi-Zeng Liang, O. Kvalheim
2001Fresenius' Journal of Analytical Chemistry35 citations
Semantic Scholar
Automated curve resolution applied to data from multi-detection instruments
Hai-Lin Shen, B. Grung, O. Kvalheim, I. Eide
200135 citations
Semantic Scholar
Interpretation of Multivariate Association Patterns between Multicollinear Physical Activity Accelerometry Data and Cardiometabolic Health in Children—A Tutorial
E. Aadland, L. Andersen, G. K. Resaland, O. Kvalheim
2019Metabolites34 citations Open access
Semantic Scholar
Variable importance: Comparison of selectivity ratio and significance multivariate correlation for interpretation of latent‐variable regression models
O. Kvalheim
2020Journal of Chemometrics33 citations Open access
Semantic Scholar
Interaction Metabolomics to Discover Synergists in Natural Product Mixtures
Warren S. Vidar, Tim U. H. Baumeister, Lindsay K. Caesar, J. Kellogg +4 more
2023Journal of Natural Products30 citations Open access
Semantic Scholar
Composite score analysis for unsupervised comparison and network visualization of metabolomics data
J. Kellogg, O. Kvalheim, N. Cech
2019Analytica Chimica Acta30 citations Open access
Semantic Scholar
Physical Activity versus Sedentary Behavior: Associations with Lipoprotein Particle Subclass Concentrations in Healthy Adults
E. Aadland, J. R. Andersen, S. Anderssen, O. Kvalheim
2013PLoS ONE30 citations Open access
Semantic Scholar
Resolution of GC-MS data of complex PAC mixtures and regression modeling of mutagenicity by PLS.
I. Eide, Gunhild Neverdal, Bodil Thorvaldsen, Hai-Lin Shen +2 more
2001Environmental Science and Technology29 citations
Semantic Scholar
Predictive associations between serum fatty acids and lipoproteins in healthy non-obese Norwegians: implications for cardiovascular health
Chenchen Lin, T. Rajalahti, S. Mjøs, O. Kvalheim
2015Metabolomics27 citations Open access
Semantic Scholar
Quantifying disturbances in benthic communities—comparison of the community disturbance index (CDI) to other multivariate methods
G. R. Flåten, H. Botnen, B. Grung, O. Kvalheim
200727 citations
Semantic Scholar
Crude Oil Model Emulsion Characterised by means of Near Infrared Spectroscopy and Multivariate Techniques
H. Kallevik, S. Hansen, Ø. Sæther, O. Kvalheim +1 more
200027 citations
Semantic Scholar
Multivariate Screening Analysis of Water-in-Oil Emulsions in High External Electric Fields as Studied by Means of Dielectric Time Domain Spectroscopy.
Ø. Midttun, H. Kallevik, J. Sjöblom, O. Kvalheim
2000Journal of Colloid and Interface Science27 citations
Semantic Scholar
Toxicological evaluation of complex mixtures: fingerprinting and multivariate analysis.
I. Eide, G. Neverdal, B. Thorvaldsen, R. Arneberg +2 more
2004Environmental Toxicology and Pharmacology26 citations
Semantic Scholar
The multivariate physical activity signature associated with metabolic health in children and youth: An International Children's Accelerometry Database (ICAD) analysis.
E. Aadland, O. Kvalheim, B. Hansen, S. Kriemler +8 more
2020Preventive Medicine21 citations Open access
Semantic Scholar
The Triaxial Physical Activity Signature Associated with Metabolic Health in Children.
E. Aadland, O. Kvalheim, S. Anderssen, G. K. Resaland +1 more
2019Medicine & Science in Sports & Exercise20 citations
Semantic Scholar
Physical activity intensity profiles associated with cardiometabolic risk in middle-aged to older men and women
P. Dempsey, E. Aadland, T. Strain, O. Kvalheim +6 more
2022Preventive Medicine17 citations Open access
Semantic Scholar
Changes in Serum Fatty Acid Levels During the First Year After Bariatric Surgery
Chenchen Lin, V. Våge, S. Mjøs, O. Kvalheim
2015Obesity Surgery17 citations Open access
Semantic Scholar
Number of components and prediction error in partial least squares regression determined by Monte Carlo resampling strategies
O. Kvalheim, B. Grung, T. Rajalahti
2019Chemometrics and Intelligent Laboratory Systems15 citations Open access
Semantic Scholar
Latent‐Variable Analysis of Multivariate Data in Infrared Spectrometry
A. Christy, O. Kvalheim
200615 citations
Semantic Scholar
Application of multivariate modelling to detect hydrocarbon components for optimal discrimination between two source rock types
W. Odden, O. Kvalheim
200015 citations
Semantic Scholar

Frequent co-authors

Invite them to SciRah by sharing their profile.

E. Aadland×12
Invite
E. Aadland — researcher profile on SciRah
S. Anderssen×9
Invite
S. Anderssen — researcher profile on SciRah
T. Rajalahti×8
Invite
T. Rajalahti — researcher profile on SciRah
G. K. Resaland×8
Invite
G. K. Resaland — researcher profile on SciRah

×8

Invite

L. Andersen — researcher profile on SciRah

Invite

N. Cech — researcher profile on SciRah

Invite

J. Kellogg — researcher profile on SciRah

Invite

B. Grung — researcher profile on SciRah

Invite

R. Arneberg — researcher profile on SciRah

Invite

K. Myhr — researcher profile on SciRah

Hai-Lin Shen×5

Invite

Hai-Lin Shen — researcher profile on SciRah

Invite

F. Berven — researcher profile on SciRah