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Browsing Brage NMBU by Author "Kohler, Achim"

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    • A high-throughput FTIR spectroscopy approach to assess adaptive variation in pollen quality 

      Zimmermann, Boris; Bagcioglu, Murat; Tafintseva, Valeria; Kohler, Achim; Ohlson, Mikael; Fjellheim, Siri (Journal article; Peer reviewed, 2017)
    • A Multiscale Vibrational Spectroscopic Approach for Identification and Biochemical Characterization of Pollen 

      Bagcioglu, Murat; Zimmermann, Boris; Kohler, Achim (Journal article; Peer reviewed, 2015)
      Background Analysis of pollen grains reveals valuable information on biology, ecology, forensics, climate change, insect migration, food sources and aeroallergens. Vibrational (infrared and Raman) spectroscopies offer ...
    • A multiscale vibrational spectroscopic approach for identification and biochemical characterization of pollen 

      Bagcioglu, Murat; Zimmermann, Boris; Kohler, Achim (Journal article; Peer reviewed, 2015)
    • A novel library-independent approach based on high-throughput cultivation in Bioscreen and fingerprinting by FTIR spectroscopy for microbial source tracking in food industry 

      Shapaval, Volha; Møretrø, Trond; Åsli, Anette Wold; Suso, Henri-Pierre; Schmitt, J; Lillehaug, D.; Kohler, Achim (Journal article; Peer reviewed, 2017)
      Microbiological source tracking (MST) for food industry is a rapid growing area of research and technology development. In this paper, a new library-independent approach for MST is presented. It is based on a high-throughput ...
    • An optimized algorithm for separating scattering and chemical absorption in biomedical infrared spectroscopy and imaging 

      Solheim, Johanne Heitmann (Master thesis, 2017)
      Infrarødspektroskopi av biologiske prøver har blitt utviklet til et lovende verktøy for ikke-destruktiv biokjemisk analyse gjennom de siste tiårene. Infrarøde absorbansspektre representerer molekylære fingeravtrykk. ...
    • Assessment of Sparse Multi-Block Partial Least Squares Regression Model Performance in Analysis of High-Dimensional Phenotypic Data 

      Møller, Tor Einar (Master thesis, 2016)
      FTIR and Raman spectroscopy, and MALDI-TOF mass spectrometry are emerging technologies for multidimensional phenotyping of microorganisms. While FTIR and Raman both represent a full metabolic fingerprint, MALDI spectra ...
    • Assessment of the scalability of a microtiter plate system for screening of oleaginous microorganisms 

      Kòsa, Gergely; Vuoristo, Kiira; Horn, Svein Jarle; Zimmermann, Boris; Afseth, Nils Kristian; Kohler, Achim; Shapaval, Volha (Journal article; Peer reviewed, 2018)
    • Biochemical profiling, prediction of total lipid content and fatty acid profile in oleaginous yeasts by FTIR spectroscopy 

      Shapaval, Volha; Brandenburg, Julie; Blomqvist, Johanna Karin Hillevi; Tafintseva, Valeria; Volkmar, Passoth; Mats, Sandgren; Kohler, Achim (Peer reviewed; Journal article, 2019)
      Background: Oleaginous yeasts are considered as a potential lipid source for food, feed and biofuel production. In order to make the yeast-based lipid production environmentally and economically sustainable, there is a ...
    • Biochemical profiling, prediction of total lipid content and fatty acid profile in oleaginous yeasts by FTIR spectroscopy 

      Shapaval, Volha; Brandenburg, Jule; Blomqvist, Johanna Karin Hillevi; Tafintseva, Valeria; Passoth, Volkmar; Sandgren, Mats; Kohler, Achim (Peer reviewed; Journal article, 2019)
    • Biochemical profiling, prediction of total lipid content and fatty acid profile in oleaginous yeasts by FTIR spectroscopy 

      Shapaval, Volha; Brandenburg, Julie; Blomqvist, Johanna Karin Hillevi; Tafintseva, Valeria; Volkmar, Passoth; Mats, Sandgren; Kohler, Achim (Peer reviewed; Journal article, 2019)
      Background: Oleaginous yeasts are considered as a potential lipid source for food, feed and biofuel production. In order to make the yeast-based lipid production environmentally and economically sustainable, there is a ...
    • Chaos enhanced light trapping in optically thin solar cells 

      Seim, Eivind (PhD thesis;2020:3, Doctoral thesis, 2020)
      Photovoltaics is one of the most important sources of renewable energy. Solar cells with thin absorbing layers can be more cost-effective and leave a smaller environmental footprint than the current commercial technology. ...
    • Chaos: A new mechanism for enhancing the optical generation rate in optically thin solar cells 

      Seim, Eivind; Kohler, Achim; Lukacs, Rozalia; Brandsrud, Maren Anna; Marstein, Erik Stensrud; Olsen, Espen; Blümel, R. (Peer reviewed; Journal article, 2019)
      The photogenerated current of solar cells can be enhanced by light management with surface structures. For solar cells with optically thin absorbing layers, it is especially important to take advantage of this fact through ...
    • Characterizing aeroallergens by infrared spectroscopy of fungal spores and pollen 

      Zimmermann, Boris; Tkalčec, Zdenko; Mešić, Armin; Kohler, Achim (Journal article; Peer reviewed, 2015)
    • Characterizing aeroallergens by infrared spectroscopy of fungal spores and pollen 

      Zimmermann, Boris; Tkalčec, Zdenko; Mešić, Armin; Kohler, Achim (Journal article; Peer reviewed, 2015)
    • Combining Chemical Information From Grass Pollen in Multimodal Characterization 

      Diehn, Sabrina; Zimmermann, Boris; Tafintseva, Valeria; Seifert, Stephan; Bağcıoğlu, Murat; Ohlson, Mikael; Weidner, Steffen; Fjellheim, Siri; Kohler, Achim; Kneipp, Janina (Peer reviewed; Journal article, 2020)
      The analysis of pollen chemical composition is important to many fields, including agriculture, plant physiology, ecology, allergology, and climate studies. Here, the potential of a combination of different spectroscopic ...
    • An exact ray model for oblique incident light on planar films 

      Brandsrud, Maren Anna; Blümel, Reinhold; You, Chang Chuan; Marstein, Erik Stensrud; Seim, Eivind; Lukacs, Rozalia; Olsen, Espen; Kohler, Achim (Peer reviewed; Journal article, 2021)
      During recent years, ray tracing has frequently been used to study the absorption characteristics of structured solar cells. However, wave properties such as absorption enhancement due to resonances in optically thin solar ...
    • An exact ray model for oblique incident light on planar films 

      Brandsrud, Maren Anna; Blümel, Reinhold; You, Chang Chuan; Marstein, Erik Stensrud; Seim, Eivind; Lukacs, Rozalia; Olsen, Espen; Kohler, Achim (Peer reviewed; Journal article, 2021)
      During recent years, ray tracing has frequently been used to study the absorption characteristics of structured solar cells. However, wave properties such as absorption enhancement due to resonances in optically thin solar ...
    • Exact ray theory for the calculation of the optical generation rate in optically thin solar cells 

      Brandsrud, Maren Anna; Seim, Eivind; Lukacs, Rozalia; Kohler, Achim; Marstein, Erik Stensrud; Olsen, Espen; Blümel, Reinhold (Journal article; Peer reviewed, 2018)
      There is a profound duality between rays and waves. In fact, 70 years ago, in the context of quantum mechanics, Feynman showed that rays, properly equipped with phases and correctly summed, provide exact solutions of the ...
    • Extended multiplicative signal correction for FTIR spectral quality test and pre-processing of infrared imaging data 

      Tafintseva, Valeria; Shapaval, Volha; Smirnova, Margarita; Kohler, Achim (Peer reviewed; Journal article, 2019)
    • FTIR spectroscopy as a unified method for simultaneous analysis of intra- and extracellular metabolites in high-throughput screening of microbial bioprocesses 

      Kosa, Gergely; Shapaval, Volha; Kohler, Achim; Zimmermann, Boris (Journal article; Peer reviewed, 2017)

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