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  1. AU="Nelles, A."
  2. AU="Shang, Cong"
  3. AU="Kohno, Keizo"
  4. AU="Machuca-Martínez, Fiderman"
  5. AU="Hao, Xintian"
  6. AU="Wong, Lydia"
  7. AU="Ottolini, Alberto"
  8. AU="Hoshi, Daisuke"
  9. AU="Kojic, Erna"
  10. AU="Liao, Weiting"
  11. AU="De Bruyn, I N"
  12. AU="Cilhoroz, Burak T"
  13. AU=Bacher Michael
  14. AU="Fujiyama, Shunichiro"
  15. AU="Ling, Xiaocui"
  16. AU="Chiu, I"
  17. AU="Bergsma, Tessa"
  18. AU="Nicitra, Emanuele"
  19. AU=Strauss Eric J AU=Strauss Eric J
  20. AU="Andy C. Y. Tse"
  21. AU=Diel J
  22. AU="Teper, Alejandro"
  23. AU="Daniel Cisterna"
  24. AU="Barré-Sinoussi, Françoise"
  25. AU="Siracusa, Massimiliano"
  26. AU="Mishra, Vipin Kumar"
  27. AU=Martinez Victor D.
  28. AU="Seol, Myung Do"
  29. AU="Sato, Keiyu"
  30. AU="Go, Ji Young"
  31. AU="Zhao, Bingjian"
  32. AU="Ringeisen, Bradley R"
  33. AU=Sciascia Savino
  34. AU="Capito, Carmen"
  35. AU=Osman Mahasin

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  1. Artikel: Short-term effects of plant hormones on membrane potential and membrane permeability of dwarf maize coleoptile cells (Zea mays L. d 1) in comparison with growth responses.

    Nelles, A

    Planta

    2014  Band 137, Heft 3, Seite(n) 293–298

    Abstract: The membrane potential difference of dwarf maize coleoptile cells is increased by both 10(-5)moll(-1) gibberellic acid (GA3) and indoleacetic acid (IAA) a few minutes after application. A final level is reached after 10-20 min. The membrane permeability ... ...

    Abstract The membrane potential difference of dwarf maize coleoptile cells is increased by both 10(-5)moll(-1) gibberellic acid (GA3) and indoleacetic acid (IAA) a few minutes after application. A final level is reached after 10-20 min. The membrane permeability ratio P Na:P K is altered by both hormones during the first 15 min after application, indicating a rapid effect on the membrane. Elongation growth of coleoptile segments, however, is only stimulated by IAA. The auxin-induced growth as well as the auxin effect on membrane permeability depends on the calcium ion concentration of the medium. It is concluded that IAA acts via a proton extrusion pump that is electrically balanced by a potassium ion uptake, driven by the electromotive force of the pump. The mode of action of GA3 on elongation growth is assumed to involve a process that depends on the physiologic state of the tissue and/or metabolic energy.
    Sprache Englisch
    Erscheinungsdatum 2014-01-13
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 208909-9
    ISSN 1432-2048 ; 0032-0935 ; 1866-2749
    ISSN (online) 1432-2048
    ISSN 0032-0935 ; 1866-2749
    DOI 10.1007/BF00388165
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Who Opts Out? The Customisation of Marriage in the German Matrimonial Property Regime.

    Nutz, Theresa / Nelles, Anika / Lersch, Philipp M

    European journal of population = Revue europeenne de demographie

    2022  Band 38, Heft 3, Seite(n) 353–375

    Abstract: This study examines the prevalence of marital contracts across marriage cohorts (1990-2019) in Germany. We further investigate the characteristics of spouses who signed a marital contract. Using cross-sectional data from the German Family Panel (pairfam, ...

    Abstract This study examines the prevalence of marital contracts across marriage cohorts (1990-2019) in Germany. We further investigate the characteristics of spouses who signed a marital contract. Using cross-sectional data from the German Family Panel (pairfam, 2018/19), we employ complementary log-log and multinomial logistic regression models to predict the prevalence and the type of marital contracts. The results show that 5% of all married couples opt out of the default matrimonial property regime by signing a contract in Germany. Differentiating between contract types, most couples either specify a separation of property (40%) or modify the default community of accrued gains (31%). We find an increase in the prevalence of marital contracts across marriage cohorts. The decision to opt out of the default is strongly positively associated with self-employment that often requires the customisation of asset ownership structures within marriage. Married individuals with prior divorce experiences are more likely to opt for the separation of property, indicating that the awareness of the economic consequences of divorce promotes the individualisation of marriage. Our results are in line with the cross-national trend towards customised marriages, although the trend in Germany is less pronounced than in other countries.
    Supplementary information: The online version contains supplementary material available at 10.1007/s10680-022-09613-8.
    Sprache Englisch
    Erscheinungsdatum 2022-03-23
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 2015429-X
    ISSN 1572-9885 ; 0168-6577
    ISSN (online) 1572-9885
    ISSN 0168-6577
    DOI 10.1007/s10680-022-09613-8
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: The Relationship of Lightning Radio Pulse Amplitudes and Source Altitudes as Observed by LOFAR.

    Machado, J G O / Hare, B M / Scholten, O / Buitink, S / Corstanje, A / Falcke, H / Hörandel, J R / Huege, T / Krampah, G K / Mitra, P / Mulrey, K / Nelles, A / Pandya, H / Rachen, J P / Thoudam, S / Trinh, T N G / Ter Veen, S / Winchen, T

    Earth and space science (Hoboken, N.J.)

    2022  Band 9, Heft 4, Seite(n) e2021EA001958

    Abstract: When a lightning flash is propagating in the atmosphere it is known that especially the negative leaders emit a large number of very high frequency (VHF) radio pulses. It is thought that this is due to streamer activity at the tip of the growing negative ...

    Abstract When a lightning flash is propagating in the atmosphere it is known that especially the negative leaders emit a large number of very high frequency (VHF) radio pulses. It is thought that this is due to streamer activity at the tip of the growing negative leader. In this work, we have investigated the dependence of the strength of this VHF emission on the altitude of such emission for two lightning flashes as observed by the Low Frequency ARray (LOFAR) radio telescope. We find for these two flashes that the extracted amplitude distributions are consistent with a power-law, and that the amplitude of the radio emissions decreases very strongly with source altitude, by more than a factor of 2 from 1 km altitude up to 5 km altitude. In addition, we do not find any dependence on the extracted power-law with altitude, and that the extracted power-law slope has an average around 3, for both flashes.
    Sprache Englisch
    Erscheinungsdatum 2022-04-21
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2807271-6
    ISSN 2333-5084
    ISSN 2333-5084
    DOI 10.1029/2021EA001958
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: A distinct negative leader propagation mode.

    Scholten, O / Hare, B M / Dwyer, J / Liu, N / Sterpka, C / Kolmašová, I / Santolík, O / Lán, R / Uhlíř, L / Buitink, S / Corstanje, A / Falcke, H / Huege, T / Hörandel, J R / Krampah, G K / Mitra, P / Mulrey, K / Nelles, A / Pandya, H /
    Rachen, J P / Trinh, T N G / Ter Veen, S / Thoudam, S / Winchen, T

    Scientific reports

    2021  Band 11, Heft 1, Seite(n) 16256

    Abstract: The common phenomenon of lightning still harbors many secrets such as what are the conditions for lightning initiation and what is driving the discharge to propagate over several tens of kilometers through the atmosphere forming conducting ionized ... ...

    Abstract The common phenomenon of lightning still harbors many secrets such as what are the conditions for lightning initiation and what is driving the discharge to propagate over several tens of kilometers through the atmosphere forming conducting ionized channels called leaders. Since lightning is an electric discharge phenomenon, there are positively and negatively charged leaders. In this work we report on measurements made with the LOFAR radio telescope, an instrument primarily build for radio-astronomy observations. It is observed that a negative leader rather suddenly changes, for a few milliseconds, into a mode where it radiates 100 times more VHF power than typical negative leaders after which it spawns a large number of more typical negative leaders. This mode occurs during the initial stage, soon after initiation, of all lightning flashes we have mapped (about 25). For some flashes this mode occurs also well after initiation and we show one case where it is triggered twice, some 100 ms apart. We postulate that this is indicative of a small (order of 5 km[Formula: see text]) high charge pocket. Lightning thus appears to be initiated exclusively in the vicinity of such a small but dense charge pocket.
    Sprache Englisch
    Erscheinungsdatum 2021-08-10
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-95433-5
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Radio Emission Reveals Inner Meter-Scale Structure of Negative Lightning Leader Steps.

    Hare, B M / Scholten, O / Dwyer, J / Ebert, U / Nijdam, S / Bonardi, A / Buitink, S / Corstanje, A / Falcke, H / Huege, T / Hörandel, J R / Krampah, G K / Mitra, P / Mulrey, K / Neijzen, B / Nelles, A / Pandya, H / Rachen, J P / Rossetto, L /
    Trinh, T N G / Ter Veen, S / Winchen, T

    Physical review letters

    2020  Band 124, Heft 10, Seite(n) 105101

    Abstract: We use the Low Frequency Array (LOFAR) to probe the dynamics of the stepping process of negatively charged plasma channels (negative leaders) in a lightning discharge. We observe that at each step of a leader, multiple pulses of vhf (30-80 MHz) radiation ...

    Abstract We use the Low Frequency Array (LOFAR) to probe the dynamics of the stepping process of negatively charged plasma channels (negative leaders) in a lightning discharge. We observe that at each step of a leader, multiple pulses of vhf (30-80 MHz) radiation are emitted in short-duration bursts (<10  μs). This is evidence for streamer formation during corona flashes that occur with each leader step, which has not been observed before in natural lightning and it could help explain x-ray emission from lightning leaders, as x rays from laboratory leaders tend to be associated with corona flashes. Surprisingly, we find that the stepping length is very similar to what was observed near the ground, however with a stepping time that is considerably larger, which as yet is not understood. These results will help to improve lightning propagation models, and eventually lightning protection models.
    Sprache Englisch
    Erscheinungsdatum 2020-03-26
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.105101
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Determining Electric Fields in Thunderclouds With the Radiotelescope LOFAR.

    Trinh, T N G / Scholten, O / Buitink, S / Ebert, U / Hare, B M / Krehbiel, P R / Leijnse, H / Bonardi, A / Corstanje, A / Falcke, H / Huege, T / Hörandel, J R / Krampah, G K / Mitra, P / Mulrey, K / Nelles, A / Pandya, H / Rachen, J P / Rossetto, L /
    Rutjes, C / Ter Veen, S / Winchen, T

    Journal of geophysical research. Atmospheres : JGR

    2020  Band 125, Heft 8, Seite(n) e2019JD031433

    Abstract: An analysis is presented of electric fields in thunderclouds using a recently proposed method based on measuring radio emission from extensive air shower events during thunderstorm conditions. This method can be regarded as a tomography of thunderclouds ... ...

    Abstract An analysis is presented of electric fields in thunderclouds using a recently proposed method based on measuring radio emission from extensive air shower events during thunderstorm conditions. This method can be regarded as a tomography of thunderclouds using cosmic rays as probes. The data cover the period from December 2011 till August 2014. We have developed an improved fitting procedure to be able to analyze the data. Our measurements show evidence for the main negative-charge layer near the -10° isotherm. This we have seen for a winter as well as for a summer cloud where multiple events pass through the same cloud and also the vertical component of the electric field could be reconstructed. On the day of measurement of some cosmic-ray events showing evidence for strong fields, no lightning activity was detected within 100 km distance. For the winter events, the top heights were between 5 and 6 km, while in the summer, typical top heights of 9 km were seen. Large horizontal components in excess of 70 kV/m of the electric fields are observed in the middle and top layers.
    Sprache Englisch
    Erscheinungsdatum 2020-04-22
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 710256-2
    ISSN 2169-8996 ; 2169-897X ; 0148-0227
    ISSN (online) 2169-8996
    ISSN 2169-897X ; 0148-0227
    DOI 10.1029/2019JD031433
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Buch ; Dissertation / Habilitation: Total Quality Management in wissenschaftlichen Bibliotheken

    Nelles, Alexandra

    eine Einführung in das Qualitätsmanagement

    (Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73)

    2000  

    Verfasserangabe Alexandra Nelles
    Serientitel Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73
    Schlagwörter Qualitätsmanagement ; Bibliothek ; Wissenschaftliche Bibliothek ; Standardisierung
    Sprache Deutsch
    Umfang 135 S., Ill., 21 cm
    Verlag Lang
    Erscheinungsort Frankfurt am Main u.a.
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Fachhochsch., Dipl.-Arb.--Hannover, 1997
    Anmerkung Literaturverz. S. 117 - 135
    ISBN 363135942X ; 9783631359426
    Datenquelle Ehemaliges Sondersammelgebiet Küsten- und Hochseefischerei

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  8. Buch ; Dissertation / Habilitation: Total Quality Management in wissenschaftlichen Bibliotheken

    Nelles, Alexandra

    eine Einführung in das Qualitätsmanagement

    (Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73)

    2000  

    Verfasserangabe Alexandra Nelles
    Serientitel Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73
    Schlagwörter Qualitätsmanagement ; Bibliothek ; Wissenschaftliche Bibliothek ; Standardisierung
    Sprache Deutsch
    Umfang 135 S., Ill., 21 cm
    Verlag Lang
    Erscheinungsort Frankfurt am Main u.a.
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Fachhochsch., Dipl.-Arb.--Hannover, 1997
    Anmerkung Literaturverz. S. 117 - 135
    ISBN 363135942X ; 9783631359426
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  9. Buch: Total-Quality-Management in wissenschaftlichen Bibliotheken

    Nelles, Alexandra

    eine Einführung in das Qualitätsmanagement

    (Europäische Hochschulschriften: Reihe 40, Kommunikationswissenschaft und Publizistik; 73)

    2000  

    Verfasserangabe Alexandra Nelles
    Serientitel Europäische Hochschulschriften: Reihe 40, Kommunikationswissenschaft und Publizistik; 73
    Schlagwörter Bibliothek ; Qualitätsmanagement
    Umfang 135 Seiten: graphische Darstellungen
    Verlag Lang; Frankfurt am Main [u.a.]
    Dokumenttyp Buch
    HBZ-ID HT011257220
    ISBN 3-631-35942-X ; 978-3-631-35942-6
    Datenquelle Zentralbibliothek der Sportwissenschaften der Deutschen Sporthochschule Köln

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  10. Buch ; Dissertation / Habilitation: Total Quality Management in wissenschaftlichen Bibliotheken

    Nelles, Alexandra

    eine Einführung in das Qualitätsmanagement

    (Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73)

    2000  

    Verfasserangabe Alexandra Nelles
    Serientitel Europäische Hochschulschriften : Reihe 40, Kommunikationswissenschaft und Publizistik ; 73
    Schlagwörter Qualitätsmanagement ; Bibliothek ; Wissenschaftliche Bibliothek ; Standardisierung
    Sprache Deutsch
    Umfang 135 S., Ill., 21 cm
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Zugl.: Hannover, Fachhochsch., Dipl.-Arb., 1997
    Anmerkung Literaturverz. S. 117 - 135
    ISBN 363135942X ; 9783631359426
    Datenquelle ECONomics Information System

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