LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Suchergebnis

Treffer 1 - 10 von insgesamt 5951

Suchoptionen

  1. Artikel ; Online: Flavin Mononucleotide-Dependent l-Lactate Dehydrogenases: Expanding the Toolbox of Enzymes for l-Lactate Biosensors.

    Tsvik, Lidiia / Steiner, Beate / Herzog, Peter / Haltrich, Dietmar / Sützl, Leander

    ACS omega

    2022  Band 7, Heft 45, Seite(n) 41480–41492

    Abstract: The development of L-lactate biosensors has been hampered in recent years by the lack ... of availability and knowledge about a wider range and diversity of L-lactate-oxidizing enzymes that can be used ... as bioelements in these sensors. For decades, L-lactate oxidase of ...

    Abstract The development of L-lactate biosensors has been hampered in recent years by the lack of availability and knowledge about a wider range and diversity of L-lactate-oxidizing enzymes that can be used as bioelements in these sensors. For decades, L-lactate oxidase of
    Sprache Englisch
    Erscheinungsdatum 2022-10-31
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c05257
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  2. Artikel ; Online: L-band vegetation optical depth as an indicator of plant water potential in a temperate deciduous forest stand

    N. M. Holtzman / L. D. L. Anderegg / S. Kraatz / A. Mavrovic / O. Sonnentag / C. Pappas / M. H. Cosh / A. Langlois / T. Lakhankar / D. Tesser / N. Steiner / A. Colliander / A. Roy / A. G. Konings

    Biogeosciences, Vol 18, Pp 739-

    2021  Band 753

    Abstract: ... remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band ...

    Abstract Vegetation optical depth (VOD) retrieved from microwave radiometry correlates with the total amount of water in vegetation, based on theoretical and empirical evidence. Because the total amount of water in vegetation varies with relative water content (as well as with biomass), this correlation further suggests a possible relationship between VOD and plant water potential, a quantity that drives plant hydraulic behavior. Previous studies have found evidence for that relationship on the scale of satellite pixels tens of kilometers across, but these comparisons suffer from significant scaling error. Here we used small-scale remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band radiometer on a tower above the canopy looking down at red oak forest stand during the 2019 growing season in central Massachusetts, United States. We measured stem xylem and leaf water potentials of trees within the stand and retrieved VOD with a single-channel algorithm based on continuous radiometer measurements and measured soil moisture. VOD exhibited a diurnal cycle similar to that of leaf and stem water potential, with a peak at approximately 05:00 eastern daylight time (UTC − 4). VOD was also positively correlated with both the measured dielectric constant and water potentials of stem xylem over the growing season. The presence of moisture on the leaves did not affect the observed relationship between VOD and stem water potential. We used our observed VOD–water-potential relationship to estimate stand-level values for a radiative transfer parameter and a plant hydraulic parameter, which compared well with the published literature. Our findings support the use of VOD for plant hydraulic studies in temperate forests.
    Schlagwörter Ecology ; QH540-549.5 ; Life ; QH501-531 ; Geology ; QE1-996.5
    Thema/Rubrik (Code) 580
    Sprache Englisch
    Erscheinungsdatum 2021-02-01T00:00:00Z
    Verlag Copernicus Publications
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  3. Buch ; Online: L-band vegetation optical depth as an indicator of plant water potential in a temperate deciduous forest stand

    Holtzman, Nataniel M. / Anderegg, Leander D. L. / Kraatz, Simon / Mavrovic, Alex / Sonnentag, Oliver / Pappas, Christoforos / Cosh, Michael H. / Langlois, Alexandre / Lakhankar, Tarendra / Tesser, Derek / Steiner, Nicholas / Colliander, Andreas / Roy, Alexandre / Konings, Alexandra G.

    eISSN: 1726-4189

    2021  

    Abstract: ... remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band ...

    Abstract Vegetation optical depth (VOD) retrieved from microwave radiometry correlates with the total amount of water in vegetation, based on theoretical and empirical evidence. Because the total amount of water in vegetation varies with relative water content (as well as with biomass), this correlation further suggests a possible relationship between VOD and plant water potential, a quantity that drives plant hydraulic behavior. Previous studies have found evidence for that relationship on the scale of satellite pixels tens of kilometers across, but these comparisons suffer from significant scaling error. Here we used small-scale remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band radiometer on a tower above the canopy looking down at red oak forest stand during the 2019 growing season in central Massachusetts, United States. We measured stem xylem and leaf water potentials of trees within the stand and retrieved VOD with a single-channel algorithm based on continuous radiometer measurements and measured soil moisture. VOD exhibited a diurnal cycle similar to that of leaf and stem water potential, with a peak at approximately 05:00 eastern daylight time (UTC − 4). VOD was also positively correlated with both the measured dielectric constant and water potentials of stem xylem over the growing season. The presence of moisture on the leaves did not affect the observed relationship between VOD and stem water potential. We used our observed VOD–water-potential relationship to estimate stand-level values for a radiative transfer parameter and a plant hydraulic parameter, which compared well with the published literature. Our findings support the use of VOD for plant hydraulic studies in temperate forests.
    Thema/Rubrik (Code) 580
    Sprache Englisch
    Erscheinungsdatum 2021-02-01
    Erscheinungsland de
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  4. Buch ; Dissertation / Habilitation: Strukturanalyse und biogeochemische Prozessaufklärung am Beispiel zweier unterschiedlich depositionsbelasteter Kiefernforstökosysteme (Pinus sylvestris L.) des nordostdeutschen Tieflandes

    Steiner, Andreas J. K.

    (Cottbuser Schriften zu Bodenschutz und Rekultivierung ; 36)

    2006  

    Verfasserangabe Andreas J. K. Steiner
    Serientitel Cottbuser Schriften zu Bodenschutz und Rekultivierung ; 36
    Überordnung
    Schlagwörter Deutschland ; Kiefernwald ; Luftverunreinigender Stoff ; Deposition ; Forstökologie
    Schlagwörter Ablagerung ; Deposition ; Luftfremder Stoff ; Luftschadstoff ; Luft ; Pinetum sylvestris ; Kiefer
    Sprache Deutsch
    Umfang XIX, 414 S. : Ill., graph. Darst.
    Verlag Brandenburgische Techn. Univ
    Erscheinungsort Cottbus
    Erscheinungsland Deutschland
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Cottbus, Techn. Univ., Diss., 2006
    Anmerkung Zsfassung in engl. Sprache
    HBZ-ID HT014810106
    Datenquelle Katalog ZB MED Ernährung, Umwelt, Agrar

    Zusatzmaterialien

    Kategorien

  5. Artikel ; Online: Vivre l’anarchie ici et maintenant

    Anne Steiner

    Cahiers d’histoire. , Vol 133, Pp 43-

    milieux libres et colonies libertaires à la Belle Époque

    2016  Band 58

    Abstract: ... testent la validité de l’hypothèse communiste (travailler et produire en dehors de tout rapport d ... utopistes, beaucoup plus souples dans la forme, plus respectueux de l’individualité et plus modestes ... quant aux fins poursuivies. Il s’agit moins, en effet, de former les cellules de l’humanité future ...

    Abstract Dans un contexte de forte mobilisation ouvrière (plus de 1000 grèves par an en moyenne entre 1905 et 1912), des militants anarchistes, sceptiques quant aux possibilités de grève générale et d’insurrection, testent la validité de l’hypothèse communiste (travailler et produire en dehors de tout rapport d’exploitation et de domination) dans le cadre de communautés de vie et de travail appelées alors « milieux libres ». Les dispositifs qu’ils inventent sont très différents de ceux qu’ont imaginés les socialistes utopistes, beaucoup plus souples dans la forme, plus respectueux de l’individualité et plus modestes quant aux fins poursuivies. Il s’agit moins, en effet, de former les cellules de l’humanité future que de se donner les moyens, en échappant au salariat, de vivre ici et maintenant en anarchiste.
    Schlagwörter Anarchie ; utopie ; milieux libres ; communauté ; colonie ; individualité ; History (General) and history of Europe ; D
    Sprache Französisch
    Erscheinungsdatum 2016-10-01T00:00:00Z
    Verlag Association Paul Langevin
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  6. Artikel ; Online: Vivre l’anarchie ici et maintenant

    Anne Steiner

    Cahiers d’histoire., Vol 133, Pp 43-

    milieux libres et colonies libertaires à la Belle Époque

    2016  Band 58

    Abstract: ... testent la validité de l’hypothèse communiste (travailler et produire en dehors de tout rapport d ... utopistes, beaucoup plus souples dans la forme, plus respectueux de l’individualité et plus modestes ... quant aux fins poursuivies. Il s’agit moins, en effet, de former les cellules de l’humanité future ...

    Abstract Dans un contexte de forte mobilisation ouvrière (plus de 1000 grèves par an en moyenne entre 1905 et 1912), des militants anarchistes, sceptiques quant aux possibilités de grève générale et d’insurrection, testent la validité de l’hypothèse communiste (travailler et produire en dehors de tout rapport d’exploitation et de domination) dans le cadre de communautés de vie et de travail appelées alors « milieux libres ». Les dispositifs qu’ils inventent sont très différents de ceux qu’ont imaginés les socialistes utopistes, beaucoup plus souples dans la forme, plus respectueux de l’individualité et plus modestes quant aux fins poursuivies. Il s’agit moins, en effet, de former les cellules de l’humanité future que de se donner les moyens, en échappant au salariat, de vivre ici et maintenant en anarchiste.
    Schlagwörter Anarchie ; utopie ; milieux libres ; communauté ; colonie ; individualité ; History (General) and history of Europe ; D
    Sprache Französisch
    Erscheinungsdatum 2016-10-01T00:00:00Z
    Verlag Association Paul Langevin
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  7. Buch ; Online: L-band vegetation optical depth as an indicator of plant water potential in a temperate deciduous forest stand

    Holtzman, Nataniel / Anderegg, Leander D. L. / Kraatz, Simon / Mavrovic, Alex / Sonnentag, Oliver / Pappas, Christoforos / Cosh, Michael H. / Langlois, Alexandre / Lakhankar, Tarendra / Tesser, Derek / Steiner, Nicholas / Colliander, Andreas / Roy, Alexandre / Konings, Alexandra G.

    eISSN: 1726-4189

    2020  

    Abstract: ... remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band ...

    Abstract Vegetation optical depth (VOD) retrieved from microwave radiometry correlates with the total amount of water in vegetation, based on theoretical and empirical evidence. Because the total amount of water in vegetation varies with relative water content (as well as with biomass), this correlation further suggests a possible relationship between VOD and plant water potential, a quantity that drives plant hydraulic behavior. Previous studies have found evidence for that relationship on the scale of satellite pixels tens of kilometers across, but these comparisons suffer from significant scaling error. Here we used small-scale remote sensing to test the link between remotely sensed VOD and plant water potential. We placed an L-band radiometer on a tower above the canopy looking down at red oak forest stand during the 2019 growing season in central Massachusetts, United States. We measured stem xylem and leaf water potentials of trees within the stand, and retrieved VOD with a single-channel algorithm based on continuous radiometer measurements and measured soil moisture. VOD exhibited a diurnal cycle similar to that of leaf and stem water potential, with a peak at approximately 5 AM. VOD was also positively correlated with both the measured dielectric constant and water potentials of stem xylem over the growing season. The presence of moisture on the leaves did not affect the observed relationship between VOD and stem water potential. We used our observed VOD-water potential relationship to estimate stand-level values for a radiative transfer parameter and a plant hydraulic parameter, which compared well with the published literature. Our findings support the use of VOD for plant hydraulic studies in temperate forests.
    Thema/Rubrik (Code) 580
    Sprache Englisch
    Erscheinungsdatum 2020-10-16
    Erscheinungsland de
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  8. Artikel ; Online: Above and belowground traits impacting transpiration decline during soil drying in 48 maize (Zea mays L.) genotypes

    Koehler, Tina / Schaum, Carolin / Tung, Shu-Yin / Steiner, Franziska / Tyborski, Nicolas / Wild, Andreas J. / Akale, Asegidew / Pausch, Johanna / Lueders, Tillmann / Wolfrum, Sebastian / Mueller, Carsten / Vidal, Alix / Vahl, Wouter / Groth, Jennifer / Eder, Barbara / Ahmed, Mutez / Carminati, Andrea

    Annals of Botany

    2023  Band 131, Heft 2

    Abstract: ... We investigate the response of 48 contrasting maize (Zea mays L.) genotypes to soil drying, utilizing a novel ...

    Abstract Background and Aim: Stomatal regulation allows plants to promptly respond to water stress. However, our understanding of the impact of above and belowground hydraulic traits on stomatal regulation remains incomplete. The objective of this study was to investigate how key plant hydraulic traits impact transpiration of maize during soil drying. We hypothesize that stomatal response to soil drying is related to a loss in soil hydraulic conductivity at the root-soil interface, which in turn depends on plant hydraulic traits. Methods: We investigate the response of 48 contrasting maize (Zea mays L.) genotypes to soil drying, utilizing a novel phenotyping facility. In this context, we measure the relationship between leaf water potential, soil water potential, soil water content and transpiration, as well as root, rhizosphere and aboveground plant traits. Key Results: Genotypes differed in their responsiveness to soil drying. The critical soil water potential at which plants started decreasing transpiration was related to a combination of above- and belowground traits: genotypes with a higher maximum transpiration and plant hydraulic conductance as well as a smaller root and rhizosphere system closed stomata at less negative soil water potentials. Conclusions: Our results demonstrate the importance of belowground hydraulics for stomatal regulation and hence drought responsiveness during soil drying. Furthermore, this finding supports the hypothesis that stomata start to close when soil hydraulic conductivity drops at the root-soil interface.
    Schlagwörter Life Science
    Sprache Englisch
    Erscheinungsland nl
    Dokumenttyp Artikel ; Online
    ZDB-ID 1461328-1
    ISSN 1095-8290 ; 0305-7364
    ISSN (online) 1095-8290
    ISSN 0305-7364
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  9. Artikel ; Online: N-Thio-β-lactams targeting L,D-transpeptidase-2, with activity against drug-resistant strains of Mycobacterium tuberculosis.

    Martelli, Giulia / Pessatti, Tomas Bohn / Steiner, Eva Maria / Cirillo, Martina / Caso, Carolina / Bisognin, Francesco / Landreh, Michael / Monte, Paola Dal / Giacomini, Daria / Schnell, Robert

    Cell chemical biology

    2021  Band 28, Heft 9, Seite(n) 1321–1332.e5

    Abstract: ... remodeling. Novel N-thio-β-lactams were designed, synthesized, and characterized on the L,D-transpeptidase-2 ...

    Abstract Effective treatment of tuberculosis is frequently hindered by the emerging antimicrobial resistance of Mycobacterium tuberculosis. The present study evaluates monocyclic β-lactam compounds targeting the mycobacterial cell wall remodeling. Novel N-thio-β-lactams were designed, synthesized, and characterized on the L,D-transpeptidase-2, a validated target in M. tuberculosis. The candidates were evaluated in biochemical assays identifying five compounds presenting target-specific kinetic constants equal or superior to meropenem, a carbapenem currently considered for tuberculosis therapy. Mass spectrometry in line with the crystal structures of five target-ligand complexes revealed that the N-thio-β-lactams act via an unconventional mode of adduct formation, transferring the thio-residues from the lactam ring to the active-site cysteine of Ldt
    Mesh-Begriff(e) Anti-Bacterial Agents/chemical synthesis ; Anti-Bacterial Agents/chemistry ; Anti-Bacterial Agents/pharmacology ; Drug Resistance, Bacterial/drug effects ; Microbial Sensitivity Tests ; Molecular Structure ; Mycobacterium tuberculosis/drug effects ; Mycobacterium tuberculosis/enzymology ; Peptidyl Transferases/antagonists & inhibitors ; Peptidyl Transferases/metabolism ; beta-Lactams/chemical synthesis ; beta-Lactams/chemistry ; beta-Lactams/pharmacology
    Chemische Substanzen Anti-Bacterial Agents ; beta-Lactams ; Peptidyl Transferases (EC 2.3.2.12)
    Sprache Englisch
    Erscheinungsdatum 2021-04-06
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2451-9448
    ISSN (online) 2451-9448
    DOI 10.1016/j.chembiol.2021.03.008
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  10. Buch ; Online ; Dissertation / Habilitation: Vorschläge zur Optimierung/Verbesserung der genetischen Qualität von Saatgut aus Erntebeständen bei den Eichenarten (Quercus robur L. & Quercus petraea [Matt.] Lieb.)

    Hardtke, André [Verfasser] / Steiner, Wilfried [Akademischer Betreuer] / Ammer, Christian [Gutachter] / Leinemann, Ludger [Gutachter]

    2022  

    Verfasserangabe Andre Hardtke ; Gutachter: Christian Ammer, Ludger Leinemann ; Betreuer: Wilfried Steiner
    Schlagwörter Landwirtschaft, Veterinärmedizin ; Agriculture, Veterinary Science
    Thema/Rubrik (Code) sg630
    Sprache Deutsch
    Verlag Niedersächsische Staats- und Universitätsbibliothek Göttingen
    Erscheinungsort Göttingen
    Dokumenttyp Buch ; Online ; Dissertation / Habilitation
    Datenquelle Digitale Dissertationen im Internet

    Zusatzmaterialien

    Kategorien

Zum Seitenanfang