Marja Ojala

Quercetin Derivatives Are Deconjugated and Converted to Hydroxyphenylacetic Acids but Not Methylated by Human Fecal Flora in Vitro

Anna‐Marja Aura, Karen O’Leary, Gary Williamson et al. · Journal of Agricultural and Food Chemistry · 2002 · 303 citations

Engineering, Nutraceutical Ingredient, Polyphenolics +17

On-Site Environmental Analysis by Membrane Inlet Mass Spectrometry

V. Virkki, Raimo A. Ketola, Marja Ojala et al. · Analytical Chemistry · 1995 · 68 citations

Bioconcentration, Environmental Chemistry, Environmental Monitoring +15

Studies on the optimization of growth and indole alkaloid production by hairy root cultures of <i>Catharanthus roseus</i>

Leena Toivonen, Marja Ojala, Veli Kauppinen · Biotechnology and Bioengineering · 1991 · 62 citations

Analysis of Volatile Organic Compounds in Water and Soil Samples by Purge-and-Membrane Mass Spectrometry

Risto Kostiainen, Tapio Kotiaho, Ismo Mattila et al. · Analytical Chemistry · 1998 · 48 citations

Engineering, Pesticide-residue Analysis, Sheet Membrane Module +18

Development of a membrane inlet mass spectrometric method for analysis of air samples

Raimo A. Ketola, Marja Ojala, Harri Sorsa et al. · Analytica Chimica Acta · 1997 · 46 citations

Air Samples, Environmental Chemistry, Air Sampling +11