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Management and Environment Effects on Brassica Forage Quality (1994)

Wiedenhoeft, M. Hagemann ; Barton, B. A.

Wiley

In: Agronomy Journal. 1994; 86(2): 227-232. Published 1994 Mar 01. doi: 10.2134/agronj1994.00021962008600020003x.

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Publikationsdatum: 1994-03-01

Print ISSN: 0002-1962

Digitale ISSN: 1435-0645

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Publiziert von Wiley

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Does soil aging affect the N2O mitigation potential of biochar? A combined microcosm and field study (2016)

Nikolas Hagemann, Johannes Harter, Radina Kaldamukova, Ivan Guzman-Bustamante, Reiner Ruser, Simone Graeff, Andreas Kappler, Sebastian Behrens

Wiley

In: GCB Bioenergy

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Publikationsdatum: 2016-07-21

Beschreibung: The application of biochar as a soil amendment to improve soil fertility has been suggested as a tool to reduce soil-borne CO 2 and non-CO 2 greenhouse gas emissions, especially nitrous oxide (N 2 O). Both lab and field trials have demonstrated N 2 O emission reduction by biochar amendment, but the long-term effect (〉1 year) has been questioned. Here we present results of a combined microcosm and field study using a powdered beech wood biochar from slow pyrolysis. The field experiment showed that both CO 2 and N 2 O emissions were still effectively reduced by biochar in the third year after application. However, biochar did not influence the biomass yield of sunflower for biogas production ( Helianthus annuus L.). Biochar reduced bulk density and increased soil aeration and thus reduced the water filled pore space (WFPS) in the field, but was also able to suppress N 2 O emission in the microcosms experiment conducted at constant WFPS. For both experiments, biochar had limited impact on soil mineral nitrogen speciation, but it reduced the accumulation of nitrite in the microcosms. Extraction of soil DNA and quantification of functional marker genes by qPCR showed that biochar did not alter the abundance of nitrogen-transforming bacteria and archaea in both field and microcosm experiments. In contradiction to previous experiments, this study demonstrates the long-term N 2 O emission suppression potential of a wood biochar and thus highlights its overall climate change mitigation potential. While a detailed understanding of the underlying mechanisms requires further research we provide evidence for a range of biochar-induced changes to the soil environment and their change with time that might explain the often observed N 2 O emission suppression. This article is protected by copyright. All rights reserved.

Print ISSN: 1757-1693

Digitale ISSN: 1757-1707

Thema: Energietechnik

Publiziert von Wiley

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Corrigendum: Inactivation of PI(3)K p110δ breaks regulatory T-cell-mediated immune tolerance to cancer (2016)

Khaled Ali; Dalya R. Soond; Roberto Piñeiro; Thorsten Hagemann; Wayne Pearce; Ee Lyn Lim; Hicham Bouabe; Cheryl L. Scudamore; Timothy Hancox; Heather Maecker; Lori Friedman; Martin Turner; Klaus Okkenhaug; Bart Vanhaesebroeck

Springer Nature

In: Nature

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Publikationsdatum: 2016-07-28

Beschreibung: Corrigendum: Inactivation of PI(3)K p110δ breaks regulatory T-cell-mediated immune tolerance to cancer Nature 535, 7613 (2016). doi:10.1038/nature17641 Authors: Khaled Ali, Dalya R. Soond, Roberto Piñeiro, Thorsten Hagemann, Wayne Pearce, Ee Lyn Lim, Hicham Bouabe, Cheryl L. Scudamore, Timothy Hancox, Heather Maecker, Lori Friedman, Martin Turner, Klaus Okkenhaug & Bart Vanhaesebroeck Nature510, 407–411 (2014); doi:10.1038/nature13444Queen Mary University London notified Nature and University College London that there is reason to question the provenance of the data for Fig. 5b, d, e of this Letter (Fig. 5a, c

Print ISSN: 0028-0836

Digitale ISSN: 1476-4687

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von Springer Nature

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Asian Irrigation, African Rain: Remote Impacts of Irrigation (2016)

Philipp Vrese, Stefan Hagemann, Martin Claussen

Wiley

In: Geophysical Research Letters

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Publikationsdatum: 2016-03-10

Beschreibung: Irrigation is not only vital for global food security, but also constitutes an anthropogenic land-use change, known to have strong effects on local hydrological and energy cycles. Using the Max Planck Institute for Meteorology's Earth System Model we show that related impacts are not confined regionally, but that possibly as much as 40% of the present-day precipitation in some of the arid regions in Eastern Africa are related to irrigation-based agriculture in Asia. Irrigation in South Asia also substantially influences the climate throughout Southeast Asia and China via the advection of water vapor and by altering the Asian monsoon. The simulated impact of irrigation on remote regions is sensitive to the magnitude of the irrigation-induced moisture flux. Therefore, it is likely that a future extension or decline of irrigated areas due to increasing food demand or declining fresh water resources will also affect precipitation and temperatures in remote regions.

Print ISSN: 0094-8276

Digitale ISSN: 1944-8007

Thema: Geologie und Paläontologie , Physik

Publiziert von Wiley im Namen von American Geophysical Union (AGU).

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5

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Land–atmosphere feedbacks amplify aridity increase over land under global warming (2016)

Alexis Berg; Kirsten Findell; Benjamin Lintner; Alessandra Giannini; Sonia I. Seneviratne; Bart van den Hurk; Ruth Lorenz; Andy Pitman; Stefan Hagemann; Arndt Meier; Frédérique Cheruy; Agnès Ducharne; Sergey Malyshev; P. C. D. Milly

Springer Nature

In: Nature Climate Change

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Publikationsdatum: 2016-08-26

Beschreibung: Aridity is expected to increase globally in a warmer world. Research now suggests that this is substantially amplified by land–atmosphere feedbacks associated with the land surface’s response to climate and plant responses to increased atmospheric CO2. Nature Climate Change 6 869 doi: 10.1038/nclimate3029

Print ISSN: 1758-678X

Digitale ISSN: 1758-6798

Thema: Geologie und Paläontologie

Publiziert von Springer Nature

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6

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Projection of glacier runoff in Yarkant River basin and Beida River basin, Western China (2011)

Shiqiang Zhang; Xin Gao; Xiaowen Zhang; Stefan Hagemann

Wiley

In: Hydrological Processes

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Publikationsdatum: 2011-11-10

Beschreibung: Potential changes in glacier area, mass balance and runoff in the Yarkant River Basin (YRB) and Beida River Basin (BRB) are projected for the period from 2011 to 2050 employing the modified monthly degree-day model forced by climate change projection. Future monthly air temperature and precipitation were derived from the simple average of 17, 16 and 17 GCM projections following the A1B, A2 and B1 scenarios, respectively. These data were downscaled to each station employing the Delta method, which computes differences between current and future GCM simulations and adds these changes to observed time-series. Model parameters calibrated with observations or results published in the literature between 1961 and 2006 were kept unchanged. Annual glacier runoff in YRB is projected to increase until 2050, and the total runoff over glacier area in 1970 is projected to increase by about 13–35% during 2011–2050 relative to the average during 1961–2006. Annual glacier runoff and the total runoff over glacier area in 1970 in BRB is projected to increase initially and then to reach a tipping point during 2011–2030. There are prominent increases in summer, but only small increase in May and October of glacier runoff in YRB, and significantly increases during late spring and early summer and significant decreases in July and late summer of glacier runoff in BRB. This study highlights the great differences among basins in their response to future climate warming. The specific runoff from areas exposed after glacier retreat relative to 1970 is projected to general increasing, which must be considered when evaluating the potential change of glacier runoff. Copyright © 2011 John Wiley & Sons, Ltd.

Print ISSN: 0885-6087

Digitale ISSN: 1099-1085

Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie

Publiziert von Wiley

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7

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High-spin rotational bands in ^{123}I (2012)

Purnima Singh, A. K. Singh, A. N. Wilson, I. Ragnarsson, H. Hübel, A. Bürger, M. P. Carpenter, S. Chmel, P. Fallon, G. B. Hagemann, B. Herskind, Hoa Ha, R. V. F. Janssens, K. Juhász, A. Kardan, T. L. Khoo, G. Kondev, A. Korichi, T. Lauritsen, B. M. Nyakó, J. Rogers, G. Sletten, J. Timár, and S. Zhu

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2012-12-18

Beschreibung: Author(s): Purnima Singh, A. K. Singh, A. N. Wilson, I. Ragnarsson, H. Hübel, A. Bürger, M. P. Carpenter, S. Chmel, P. Fallon, G. B. Hagemann, B. Herskind, Hoa Ha, R. V. F. Janssens, K. Juhász, A. Kardan, T. L. Khoo, G. Kondev, A. Korichi, T. Lauritsen, B. M. Nyakó, J. Rogers, G. Sletten, J. Timár, and S. Zhu High-spin states in 123 I were populated in the reaction 80 Se( 48 Ca, p 4 n ) 123 I at a beam energy of 207 MeV and γ -ray coincidence events were measured using the Gammasphere spectrometer. Three weakly populated, high-spin rotational bands have been discovered with characteristics similar to those of the l... [Phys. Rev. C 86, 067305] Published Mon Dec 17, 2012

Schlagwort(e): Nuclear Structure

Print ISSN: 0556-2813

Digitale ISSN: 1089-490X

Thema: Physik

Publiziert von American Physical Society (APS)

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8

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High-spin proton alignments and evidence for a second band with enhanced deformation in ^{171}Hf (2012)

Y. C. Zhang, Q. A. Ijaz, W. C. Ma, G. B. Hagemann, M. P. Carpenter, P. Chowdhury, D. M. Cullen, M. K. Djongolov, D. J. Hartley, R. V. F. Janssens, T. L. Khoo, F. G. Kondev, T. Lauritsen, E. Ngiojoi-Yogo, S. Ødegård, L. L. Riedinger, S. V. Rigby, D. G. Roux, D. T. Scholes, R. B. Yadav, and S. Zhu

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2012-06-08

Beschreibung: Author(s): Y. C. Zhang, Q. A. Ijaz, W. C. Ma, G. B. Hagemann, M. P. Carpenter, P. Chowdhury, D. M. Cullen, M. K. Djongolov, D. J. Hartley, R. V. F. Janssens, T. L. Khoo, F. G. Kondev, T. Lauritsen, E. Ngiojoi-Yogo, S. Ødegård, L. L. Riedinger, S. V. Rigby, D. G. Roux, D. T. Scholes, R. B. Yadav, and S. Zhu High-spin properties of the nucleus 171 Hf were studied through the 128 Te( 48 Ca,5 n ) reaction. Previously known bands have been extended to significantly higher spins and four new bands have been extracted from these data. The results are discussed within the framework of the cranked shell model aided ... [Phys. Rev. C 85, 064307] Published Thu Jun 07, 2012

Schlagwort(e): Nuclear Structure

Print ISSN: 0556-2813

Digitale ISSN: 1089-490X

Thema: Physik

Publiziert von American Physical Society (APS)

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9

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On the contribution of statistical bias correction to the uncertainty in the projected hydrological cycle (2011)

Cui Chen, Jan O. Haerter, Stefan Hagemann and Claudio Piani

Wiley

In: Geophysical Research Letters

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Publikationsdatum: 2011-10-26

Beschreibung: Global hydrological modeling is affected by three sources of uncertainty: (i) the choice of the global climate model (GCM) used to provide meteorological forcing data; (ii) the choice of future greenhouse gas concentration scenario; and (iii) the choice of the decade used to derive the bias correction parameters. We present a comparative analysis of these uncertainties and compare them to the inter-annual variability. The analysis focuses on discharge, integrated runoff and total precipitation over ten large catchments, representative of different climatic areas of the globe. Results are similar for all catchments, all hydrological variables and throughout the year with few exceptions. We find that the choice of different decadal periods over which to derive the bias correction parameters is a source of comparatively minor uncertainty, while other sources play larger and similarly significant roles. This is true for both the means and the extremes of the studied hydrological variables.

Print ISSN: 0094-8276

Digitale ISSN: 1944-8007

Thema: Geologie und Paläontologie , Physik

Publiziert von Wiley im Namen von American Geophysical Union (AGU).

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10

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Experimental evidence of librational vibrations determining the stability of calcium borohydride (2011)

A. Borgschulte, R. Gremaud, A. Züttel, P. Martelli, A. Remhof, A. J. Ramirez-Cuesta, K. Refson, E. G. Bardaji, W. Lohstroh, M. Fichtner, H. Hagemann, and M. Ernst

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-01-26

Beschreibung: Author(s): A. Borgschulte, R. Gremaud, A. Züttel, P. Martelli, A. Remhof, A. J. Ramirez-Cuesta, K. Refson, E. G. Bardaji, W. Lohstroh, M. Fichtner, H. Hagemann, and M. Ernst The high energy of hydrogen vibrations in solids is the origin of their strong impact on thermodynamic properties. The peculiar structure of complex hydrides amplifies this impact. We shed light on the vibrational properties of three allotropes of Ca(BH_{4} )_{2} using density-functional theory calc... [Phys. Rev. B 83, 024102] Published Tue Jan 25, 2011

Schlagwort(e): Structure, structural phase transitions, mechanical properties, defects

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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