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  1. Chapter

    Accelerated In Vitro Propagation of Sweetpotato Clones (Ipomoea batatas L.)

    Fast and reliable propagation of plant material is an important need in different stages of breeding programs and production systems. In vitro propagation ensures that pathogen- and virus-free plants stay phyt...

    R. Vollmer, J. Espirilla, J. C. Sánchez… in Technologies in Plant Biotechnology and Br… (2022)

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  2. No Access

    Article

    Evaluation of an epithelial plasticity biomarker panel in men with localized prostate cancer

    Given the potential importance of epithelial plasticity (EP) to cancer metastasis, we sought to investigate biomarkers related to EP in men with localized prostate cancer (PC) for the association with time to ...

    A J Armstrong, P Healy, S Halabi, R Vollmer… in Prostate Cancer and Prostatic Diseases (2016)

  3. No Access

    Article

    Hydroporation as the mechanism of hydrodynamic delivery

    We have reported that a rapid tail vein injection of a large volume of plasmid DNA solution into a mouse results in high level of transgene expression in the liver. Gene transfer efficiency of this hydrodynami...

    G Zhang, X Gao, Y K Song, R Vollmer, D B Stolz, J Z Gasiorowski, D A Dean… in Gene Therapy (2004)

  4. Article

    Erratum: Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2

    Nature, 412, 58–61 (2001). In Fig. 2 the temperature axis has erroneously been multiplied by a factor of ten. These values should read 0.1 K to 0.6 K.

    C. Pfleiderer, M. Uhlarz, S. M. Hayden, R. Vollmer, H. v. Löhneysen… in Nature (2001)

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  5. No Access

    Article

    Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2

    It has generally been believed that, within the context of the Bardeen–Cooper–Schrieffer (BCS) theory of superconductivity, the conduction electrons in a metal cannot be both ferromagnetically ordered and supe...

    C. Pfleiderer, M. Uhlarz, S. M. Hayden, R. Vollmer, H. v. Löhneysen… in Nature (2001)

  6. No Access

    Article

    Low-temperature magnetic and thermal properties of CePd2In in magnetic fields

    A detailed study of the low-temperature magnetization M and specific heat C of CePd2In is reported. For B ≈ 0, M and C show maxima at TN≈ 1.25 K indicating an antiferromagnetic phase transition as observed previo...

    S. Mock, T. Pietrus, A. Sidorenko, R. Vollmer… in Journal of Low Temperature Physics (1996)

  7. No Access

    Chapter and Conference Paper

    Topographie von Attraktoren im Elektroenzephalogramm

    Das Konzept des deterministischen Chaos hat sich in verschiedensten naturwissenschaftlichen Disziplinen als wertvolles Werkzeug zur Beschreibung dynamischer nichtlinearer Systeme mit mehreren Freiheitsgraden b...

    R. H. **dra, R. Vollmer in Topographische Diagnostik des Gehirns (1995)

  8. No Access

    Chapter and Conference Paper

    Fractals in EEG Map**

    The concept of self-similarity is applied to the electroencephalogram. By means of the wave equation fractal maps of the electrical field on the scalp are estimated. The presented examples suggest a connection...

    R. H. **dra, R. Vollmer in Medical Informatics Europe 1991 (1991)

  9. No Access

    Chapter and Conference Paper

    Nutzungsgerechte Mobilkommunikation

    Information und Kommunikation werden im Automobil immer wichtiger und vielfältiger. Die entsprechenden Systeme machen ein gut Teil der Kfz-Elektronik aus, der heute bei ca. 12% der Herstellkosten eines Kraftfa...

    R. Vollmer in Benutzerfreundliche Kommunikation / User-Friendly Communication (1990)

  10. No Access

    Chapter and Conference Paper

    Structure Differences of Topographical EEG Map**s

    In recent years great efforts have been undertaken to compute two-dimensional map**s from EEG recordings. The algorithms have been taken from applied theory of stochastic processes or from electrodynamics. R...

    R. H. **dra, R. Vollmer in Topographic Brain Map** of EEG and Evoked Potentials (1989)

  11. No Access

    Article

    Nd and Sr isotopes in ultrapotassic volcanic rocks from the Leucite Hills, Wyoming

    Nd and Sr isotopic compositions and Rb, Sr, Sm and Nd concentrations are reported for madupites, wyomingites and orendites from the Pleistocene volcanic field of the Leucite Hills, Wyoming. All Leucite Hills r...

    R. Vollmer, P. Ogden, J. -G. Schilling… in Contributions to Mineralogy and Petrology (1984)

  12. No Access

    Article

    Unusual isotopic variations in Nyiragongo nephelinites

    Nd and Sr isotopic ratios in Nyiragongo nephelinites are fairly constant and close to ‘bulk Earth’1,2 estimates. By contrast, 206Pb/204Pb variations are the largest ever observed for young volcanic rocks. If the ...

    R. Vollmer, M. J. Norry in Nature (1983)

  13. No Access

    Chapter and Conference Paper

    EEG Analysis Methods in Experimental Neurophysiological Research

    This paper deals with the application of spectral analytical methods to field potentials (EEG) recorded simultaneously with arrays of electrodes from the cortical surface or from intracortically. An essential ...

    P. Rappelsberger, H. Pockberger, H. Petsche, R. Vollmer in Medical Informatics Europe 82 (1982)

  14. No Access

    Article

    143Nd/144Nd and 87Sr/86Sr ratios from the Azores and their significance in LIL-element enriched mantle

    Basalts from Sao Miguel are displaced to higher 87Sr/86Sr ratios, and have a significantly shallower slope, compared with the main correlation between 143Nd/144Nd and 87Sr/86Sr for most mantle-derived volcanic ro...

    C. J. Hawkesworth, M. J. Norry, J. C. Roddick, R. Vollmer in Nature (1979)

  15. No Access

    Article

    Crustal contamination versus enriched mantle: 143Nd/144Nd and 87Sr/86Sr evidence from the Italian volcanics

    143Nd/144Nd, 87Sr/86Sr, and REE analyses are presented on a wide variety of Pliocene-Recent volcanic rocks from central Italy. 143Nd/144Nd varies from 0.51214–0.51289 and 87Sr/86Sr from 0.7255-0.7036; while the ...

    C. J. Hawkesworth, R. Vollmer in Contributions to Mineralogy and Petrology (1979)

  16. No Access

    Article

    Combination chemotherapy (COMP protocol) and radiotherapy of anaplastic supratentorial gliomas

    Postoperative survival time and recurrence-free intervals in 116 consecutive patients with supratentorial grade III and IV gliomas (glioblastomas, gliosarcomas, anaplastic astrocytomas, and ependymomas) were c...

    K. Jellinger, P. Kothbauer, D. Volc, R. Vollmer, R. Weiß in Acta Neurochirurgica (1979)

  17. No Access

    Article

    Terrestrial lead isotopic evolution and formation time of the Earth's core

    The radiogenic nature of Pb in average crust and mantle probably requires some interaction between mantle and core during core formation and is thus incompatible with heterogeneous accretion models for the Ear...

    R. Vollmer in Nature (1977)

  18. No Access

    Article

    A technique for recording local blood flow and neuronal activity with a single microelectrode

    A technique is presented for recording both local blood flow, by means of hydrogen clearance method, and neuronal activity of the cat's cortex using a single microelectrode. The requirements of electrodes for ...

    P. Rappelsberger, W. -D. Heiss, R. Vollmer, M. Turnheim in Pflügers Archiv (1977)

  19. No Access

    Chapter and Conference Paper

    Über das Stumpfkarzinom beim Magenoperierten

    Sektionsstatistiken und klinische Untersuchungen sprechen für eine Häufigkeitszunahme des Karzinoms im operierten Magen, obwohl die Entfernung der distalen 2/3 dieses Organs das Krebsrisiko senken müßte [2–6, ...

    E. Schmid, R. Vollmer, J. Adlung, E. Blaich… in Verhandlungen der Deutschen Gesellschaft f… (1976)

  20. No Access

    Article

    Origin of alkaline rocks

    THE hypothesis of limestone assimilation1,2, developed to explain differentiation of the Vesuvius magma, was long unchallenged for that area—and extended3—even when it had to be abandoned for other alkaline provi...

    R. VOLLMER in Nature (1975)

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