J. A. López-Pérez

Yebes Observatory

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F. Tercero

Yebes Observatory

P. de Vicente

Yebes Observatory

J. D. Gallego

Yebes Observatory

J. A. López-Fernández

Yebes Observatory

J. Cernicharo

Consejo Superior de Investigaciones Científicas

J. R. Pardo

Instituto de Física Fundamental

C. Cabezas

Instituto de Física Fundamental

B. Tercero

Spanish National Observatory

M. Agúndez

Consejo Superior de Investigaciones Científicas

M. Patino-Esteban

Yebes Observatory

Cooperative Institutions

Centre National de la Recherche Scientifique

141

Yebes Observatory

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Institut de Recherche sur les Lois Fondamentales de l'Univers

CEA Paris-Saclay

Université Paris Cité

Max Planck Institute for Nuclear Physics

Max Planck Society

Campbell Collaboration

Université Paris-Saclay

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Alternativas al bromuro de metilo en cultivos protegidos de la Comunidad de Madrid

Miguel Escuer M. Arias R. Sanz J. A. López-Pérez

Se estudia en una rotacion de cultivo pepino-acelga, bajo invernadero en Villa del Prado (Madrid), la influencia sobre las poblaciones de Meloidogyne incognita de la incorporacion al suelo de restos de compost de champinon, metam sodio y bromuro de metilo. Se encuentra que la eficacia en el control de los nematodos fitoparasitos del tratamiento con compost fue igual del metam sodio y bromuro de metilo, siendo la produccion similar en los tratamientos con compost y bromuro de metilo, aunque los costes fueron inferiores en el tratamiento con compost.

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De la evidencia a la recomendación. GRADE

Elsevier eBooks (2015)

Juan B Cabello J. A. López-Pérez

10.1016/b978-84-9022-447-2.00011-3

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CCC Observations of Pluto, Neptune and Triton with the San Fernando automatic meridian circle.

J. L. Muiños F. Bélizon Miguel A. Vallejo C. Mallamaci J. A. López-Pérez

Neptune

Pluto

Meridian (astronomy)

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A Tri-band Cryogenic Receiver for VGOS Radio Telescopes

J. A. López-Pérez J. A. López-Fernández F. Tercero B. Vaquero J. M. Serna

Very-long-baseline interferometry

Radio Astronomy

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Figure 1, Stability Data for the Probe (CID 49835877/ML239) in PBS Plus Acetonitrile Over 48 Hours

Leigh Carmody Andrew Germain Barbara J. Morgan Lynn VerPlank Cristina Fernández

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Discovery of allenyl acetylene, H2CCCHCCH, in TMC-1

Astronomy and Astrophysics (2021)

J. Cernicharo C. Cabezas M. Agúndez B. Tercero N. Marcelino

We present the discovery in TMC-1 of allenyl acetylene, H 2 CCCHCCH, through the observation of nineteen lines with a signal-to-noise ratio ∼4–15. For this species, we derived a rotational temperature of 7 ± 1 K and a column density of 1.2 ± 0.2 × 10 13 cm −2 . The other well known isomer of this molecule, methyl diacetylene (CH 3 C 4 H), has also been observed and we derived a similar rotational temperature, T r = 7.0 ± 0.3 K, and a column density for its two states ( A and E ) of 6.5 ± 0.3 × 10 12 cm −2 . Hence, allenyl acetylene and methyl diacetylene have a similar abundance. Remarkably, their abundances are close to that of vinyl acetylene (CH 2 CHCCH). We also searched for the other isomer of C 5 H 4 , HCCCH 2 CCH (1.4-Pentadiyne), but only a 3 σ upper limit of 2.5 × 10 12 cm −2 to the column density can be established. These results have been compared to state-of-the-art chemical models for TMC-1, indicating the important role of these hydrocarbons in its chemistry. The rotational parameters of allenyl acetylene have been improved by fitting the existing laboratory data together with the frequencies of the transitions observed in TMC-1.

Diacetylene

Acetylene

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BRAND: A Very Wide-band Receiver for the EVN

G. Tuccari W. Alef Miroslav Pantaleev Jonas Flygare J. A. López-Pérez

BRAND stands for BRoad bAND EVN, a project to build a prototype primary focus receiver with the very wide frequency range from 1.5 GHz to 15.5 GHz, to investigate secondary focus solutions, and to make a survey of the EVN telescopes in order to set the stage for equipping all EVN stations with such a receiver as soon as possible. The project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 730562 and is a Joint Research Activity (JRA) in the RadioNet programme. We present the motivation, aims, scope and status of the project which was started on January 1st, 2017.

Scope (computer science)

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Status of the Future RAEGE Radio Telescope at Gran Canaria

D. Cordobés V. Araña J. A. López-Pérez Antonio J. García I. Domínguez Cerdeña

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Antonio Bello Pérez: semblanza de un investigador

Phytoma España: La revista profesional de sanidad vegetal (2010)

M. Arias Avelino García Álvarez Juan José Ibáñez Guillén Concepción Jordá Gutiérrez Alfredo Lacasa Plasencia

Antonio Bello Perez, Profesor de Investigacion del CSIC, Dr. en Ciencias Biologicas, nematologo, fundador del primer departamento de Agroecologia en Espana y defensor a ultranza de una �AGRICULTURA BIEN HECHA� para la obtencion de alimentos libres de contaminantes, se ha jubilado el 27 de agosto. Con este motivo cabe destacar su personalidad y la importancia que, su inmenso trabajo, ha supuesto para la INVESTIGACION.

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Surface Accuracy Improvement of the Yebes 40 Meter Radiotelescope Using Microwave Holography

IEEE Transactions on Antennas and Propagation (2014)

J. A. López-Pérez P. de Vicente J. A. López-Fernández Felix Tercero Martinez Alberto Barcia Cancio

The surface improvement of the Centro Astronómico de Yebes (CAY) 40 m radiotelescope with the use of coherent (with-phase) microwave holography is shown. For this purpose, a dual channel Ku-band receiver in prime focus has been developed. It allows holography measurements with unmodulated beacons from geostationary satellites in the Clarke belt. Initial surface measurements revealed an accuracy of 485 μm amplitude-weighted RMS (WRMS) with respect to the best-fit paraboloid. After a few iterations of the measurement and surface adjustment cycle, the accuracy has been improved to 194 μm WRMS. This means an estimated aperture efficiency improvement from 2.6% to 38.2% at 86 GHz for a prime-focus receiver with an illumination equal to the one produced by the holography receiver test feed.

Paraboloid

Astron

Aperture (computer memory)

10.1109/tap.2014.2307351

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Citations (21)