@article{SpijkermanLukasWacker2017,
  author    = {Spijkerman, Elly and Lukas, Marcus and Wacker, Alexander},
  title     = {Ecophysiological strategies for growth under varying light and organic carbon supply in two species of green microalgae differing in their motility},
  series = {Phytochemistry : an international journal of plant biochemistry},
  volume    = {144},
  journal   = {Phytochemistry : an international journal of plant biochemistry},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0031-9422},
  doi       = {10.1016/j.phytochem.2017.08.018},
  pages     = {43 -- 51},
  year      = {2017},
  abstract  = {Mixing events in stratified lakes result in microalgae being exposed to varying conditions in light and organic carbon concentrations. Stratified lakes consist of an upper illuminated strata and a lower, darker strata where organic carbon accumulates. Therefore, in this contribution we explore the importance of dissolved organic carbon for growth under various light intensities by measuring some ecophysiological adaptations in two green microalgae. We compared the non-motile Chlorella vulgaris with the flagellated Chlamydomonas acidophila under auto-, mixo-, and heterotrophic growth conditions. In both algae the maximum photosynthetic and growth rates were highest under mixotrophy, and both algae appeared inhibited in their phosphorus acquisition under heterotrophy. Heterotrophic conditions provoked the largest differences as C. vulgaris produced chlorophyll a in darkness and grew as well as in autotrophic conditions, whereas Chl. acidophila bleached and could not grow heterotrophically. Although the fatty acid composition of both phytoplankton species differed, both species reacted in a similar way to changes in their growth conditions, mainly by a decrease of C18:3n-3 and an increase of C18:1n-9 from auto- to heterotrophic conditions. The two contrasting responses within the group of green microalgae suggest that dissolved organic carbon has a high deterministic potential to explain the survival and behaviour of green algae in the deeper strata of lakes.},
  language  = {en}
}
@article{SpijkermanWacker2011,
  author    = {Spijkerman, Elly and Wacker, Alexander},
  title     = {Interactions between P-limitation and different C conditions on the fatty acid composition of an extremophile microalga},
  series = {Extremophiles : life under extreme conditions},
  volume    = {15},
  journal   = {Extremophiles : life under extreme conditions},
  number    = {5},
  publisher = {Springer},
  address   = {Tokyo},
  issn      = {1431-0651},
  doi       = {10.1007/s00792-011-0390-3},
  pages     = {597 -- 609},
  year      = {2011},
  abstract  = {The extremophilic microalga Chlamydomonas acidophila inhabits very acidic waters (pH 2-3.5), where its growth is often limited by phosphorus (P) or colimited by P and inorganic carbon (CO(2)). Because this alga is a major food source for predators in acidic habitats, we studied its fatty acid content, which reflects their quality as food, grown under a combination of P-limited and different carbon conditions (either mixotrophically with light + glucose or at high or low CO(2), both without glucose). The fatty acid composition largely depended on the cellular P content: stringent P-limited cells had a higher total fatty acid concentration and had a lower percentage of polyunsaturated fatty acids. An additional limitation for CO(2) inhibited this decrease, especially reflected in enhanced concentrations of 18:3(9,12,15) and 16:4(3,7,10,13), resulting in cells relatively rich in polyunsaturated fatty acids under colimiting growth conditions. The percentage of polyunsaturated to total fatty acid content was positively related with maximum photosynthesis under all conditions applied. The two factors, P and CO(2), thus interact in their effect on the fatty acid composition in C. acidophila, and colimited cells P-limited algae can be considered a superior food source for herbivores because of the high total fatty acid content and relative richness in polyunsaturated fatty acids.},
  language  = {en}
}
@article{MoserTschakertMuelleretal.2015,
  author    = {Moser, Othmar and Tschakert, Gerhard and M{\"u}ller, Alexander and Groeschl, Werner and Pieber, Thomas R. and Obermayer-Pietsch, Barbara and Koehler, Gerd and Hofmann, Peter},
  title     = {Exercise versus Moderate Continuous Exercise on Glucose Homeostasis and Hormone Response in Patients with Type 1 Diabetes Mellitus Using Novel Ultra-Long-Acting Insulin},
  series = {PLoS one},
  volume    = {10},
  journal   = {PLoS one},
  number    = {8},
  publisher = {Public Library of Science},
  address   = {Lawrence},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0136489},
  pages     = {17},
  year      = {2015},
  abstract  = {Introduction We investigated blood glucose (BG) and hormone response to aerobic high-intensity interval exercise (HIIE) and moderate continuous exercise (CON) matched for mean load and duration in type 1 diabetes mellitus (T1DM). Material and Methods Seven trained male subjects with T1DM performed a maximal incremental exercise test and HIIE and CON at 3 different mean intensities below (A) and above (B) the first lactate turn point and below the second lactate turn point (C) on a cycle ergometer. Subjects were adjusted to ultra-long-acting insulin Degludec (Tresiba/ Novo Nordisk, Denmark). Before exercise, standardized meals were administered, and short-acting insulin dose was reduced by 25\% (A), 50\% (B), and 75\% (C) dependent on mean exercise intensity. During exercise, BG, adrenaline, noradrenaline, dopamine, cortisol, glucagon, and insulin-like growth factor-1, blood lactate, heart rate, and gas exchange variables were measured. For 24 h after exercise, interstitial glucose was measured by continuous glucose monitoring system. Results BG decrease during HIIE was significantly smaller for B (p = 0.024) and tended to be smaller for A and C compared to CON. No differences were found for post-exercise interstitial glucose, acute hormone response, and carbohydrate utilization between HIIE and CON for A, B, and C. In HIIE, blood lactate for A (p = 0.006) and B (p = 0.004) and respiratory exchange ratio for A (p = 0.003) and B (p = 0.003) were significantly higher compared to CON but not for C. Conclusion Hypoglycemia did not occur during or after HIIE and CON when using ultra-long-acting insulin and applying our methodological approach for exercise prescription. HIIE led to a smaller BG decrease compared to CON, although both exercises modes were matched for mean load and duration, even despite markedly higher peak workloads applied in HIIE. Therefore, HIIE and CON could be safely performed in T1DM.},
  language  = {en}
}