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Science
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Disponibilidad
| Institución detectada | Período | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No detectada | desde mar. 1997 / hasta dic. 2023 | Science Journals |
Información
Tipo de recurso:
revistas
ISSN impreso
0036-8075
ISSN electrónico
1095-9203
Editor responsable
American Association for the Advancement of Science (AAAS)
País de edición
Estados Unidos
Fecha de publicación
1880-
Cobertura temática
Tabla de contenidos
On Tropical Forests and Their Pests
Phyllis D. Coley; Thomas A. Kursar
<jats:p>Interactions with pest species may help to explain the high plant species diversity in tropical forests.</jats:p>
Palabras clave: Multidisciplinary.
Pp. 35-36
The Bright Optical Flash and Afterglow from the Gamma-Ray Burst GRB 130427A
W. T. Vestrand; J. A. Wren; A. Panaitescu; P. R. Wozniak; H. Davis; D. M. Palmer; G. Vianello; N. Omodei; S. Xiong; M. S. Briggs; M. Elphick; W. Paciesas; W. Rosing
<jats:title>Bright Lights</jats:title> <jats:p> Gamma-ray bursts (GRBs), bright flashes of gamma-ray light, are thought to be associated with the collapse of massive stars. GRB 130427A was detected on 27 April 2013, and it had the longest gamma-ray duration and one of the largest isotropic energy releases observed to date (see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="34" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248522">Fynbo</jats:related-article> </jats:bold> ). <jats:bold> Ackermann <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="42" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242353">42</jats:related-article> , published online 21 November) report data obtained with the Fermi Gamma-Ray Space Telescope, which reveal a high-energy spectral component that cannot be accounted for by the standard external shock synchrotron radiation model. <jats:bold> Vestrand <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="38" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242316">38</jats:related-article> , published online 21 November) report the detection of an extremely bright flash of visible light and unexpected similarities between the variations of optical light and the highest-energy gamma rays that indicate a common origin. A detailed analysis of the first pulse of GRB 130427A by <jats:bold> Preece <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="51" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242302">51</jats:related-article> , published online 21 November) suggests that existing models cannot explain all the observed spectral and temporal behaviors simultaneously. <jats:bold> Maselli <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="48" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242279">48</jats:related-article> , published online 21 November) present x-ray and optical light curves of the burst's prompt emission as well as of its afterglow as recorded by the Swift satellite and a range of ground-based telescopes. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 38-41
Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A
M. Ackermann; M. Ajello; K. Asano; W. B. Atwood; M. Axelsson; L. Baldini; J. Ballet; G. Barbiellini; M. G. Baring; D. Bastieri; K. Bechtol; R. Bellazzini; E. Bissaldi; E. Bonamente; J. Bregeon; M. Brigida; P. Bruel; R. Buehler; J. Michael Burgess; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; C. Cecchi; V. Chaplin; E. Charles; A. Chekhtman; C. C. Cheung; J. Chiang; G. Chiaro; S. Ciprini; R. Claus; W. Cleveland; J. Cohen-Tanugi; A. Collazzi; L. R. Cominsky; V. Connaughton; J. Conrad; S. Cutini; F. D’Ammando; A. de Angelis; M. DeKlotz; F. de Palma; C. D. Dermer; R. Desiante; A. Diekmann; L. Di Venere; P. S. Drell; A. Drlica-Wagner; C. Favuzzi; S. J. Fegan; E. C. Ferrara; J. Finke; G. Fitzpatrick; W. B. Focke; A. Franckowiak; Y. Fukazawa; S. Funk; P. Fusco; F. Gargano; N. Gehrels; S. Germani; M. Gibby; N. Giglietto; M. Giles; F. Giordano; M. Giroletti; G. Godfrey; J. Granot; I. A. Grenier; J. E. Grove; D. Gruber; S. Guiriec; D. Hadasch; Y. Hanabata; A. K. Harding; M. Hayashida; E. Hays; D. Horan; R. E. Hughes; Y. Inoue; T. Jogler; G. Jóhannesson; W. N. Johnson; T. Kawano; J. Knödlseder; D. Kocevski; M. Kuss; J. Lande; S. Larsson; L. Latronico; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; M. Mayer; M. N. Mazziotta; J. E. McEnery; P. F. Michelson; T. Mizuno; A. A. Moiseev; M. E. Monzani; E. Moretti; A. Morselli; I. V. Moskalenko; S. Murgia; R. Nemmen; E. Nuss; M. Ohno; T. Ohsugi; A. Okumura; N. Omodei; M. Orienti; D. Paneque; V. Pelassa; J. S. Perkins; M. Pesce-Rollins; V. Petrosian; F. Piron; G. Pivato; T. A. Porter; J. L. Racusin; S. Rainò; R. Rando; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; S. Ritz; M. Roth; F. Ryde; A. Sartori; P. M. Saz Parkinson; J. D. Scargle; A. Schulz; C. Sgrò; E. J. Siskind; E. Sonbas; G. Spandre; P. Spinelli; H. Tajima; H. Takahashi; J. G. Thayer; J. B. Thayer; D. J. Thompson; L. Tibaldo; M. Tinivella; D. F. Torres; G. Tosti; E. Troja; T. L. Usher; J. Vandenbroucke; V. Vasileiou; G. Vianello; V. Vitale; B. L. Winer; K. S. Wood; R. Yamazaki; G. Younes; H.-F. Yu; S. J. Zhu; P. N. Bhat; M. S. Briggs; D. Byrne; S. Foley; A. Goldstein; P. Jenke; R. M. Kippen; C. Kouveliotou; S. McBreen; C. Meegan; W. S. Paciesas; R. Preece; A. Rau; D. Tierney; A. J. van der Horst; A. von Kienlin; C. Wilson-Hodge; S. Xiong; G. Cusumano; V. La Parola; J. R. Cummings
<jats:title>Bright Lights</jats:title> <jats:p> Gamma-ray bursts (GRBs), bright flashes of gamma-ray light, are thought to be associated with the collapse of massive stars. GRB 130427A was detected on 27 April 2013, and it had the longest gamma-ray duration and one of the largest isotropic energy releases observed to date (see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="34" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248522">Fynbo</jats:related-article> </jats:bold> ). <jats:bold> Ackermann <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="42" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242353">42</jats:related-article> , published online 21 November) report data obtained with the Fermi Gamma-Ray Space Telescope, which reveal a high-energy spectral component that cannot be accounted for by the standard external shock synchrotron radiation model. <jats:bold> Vestrand <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="38" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242316">38</jats:related-article> , published online 21 November) report the detection of an extremely bright flash of visible light and unexpected similarities between the variations of optical light and the highest-energy gamma rays that indicate a common origin. A detailed analysis of the first pulse of GRB 130427A by <jats:bold> Preece <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="51" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242302">51</jats:related-article> , published online 21 November) suggests that existing models cannot explain all the observed spectral and temporal behaviors simultaneously. <jats:bold> Maselli <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="48" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242279">48</jats:related-article> , published online 21 November) present x-ray and optical light curves of the burst's prompt emission as well as of its afterglow as recorded by the Swift satellite and a range of ground-based telescopes. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 42-47
GRB 130427A: A Nearby Ordinary Monster
A. Maselli; A. Melandri; L. Nava; C. G. Mundell; N. Kawai; S. Campana; S. Covino; J. R. Cummings; G. Cusumano; P. A. Evans; G. Ghirlanda; G. Ghisellini; C. Guidorzi; S. Kobayashi; P. Kuin; V. La Parola; V. Mangano; S. Oates; T. Sakamoto; M. Serino; F. Virgili; B.-B. Zhang; S. Barthelmy; A. Beardmore; M. G. Bernardini; D. Bersier; D. Burrows; G. Calderone; M. Capalbi; J. Chiang; P. D’Avanzo; V. D’Elia; M. De Pasquale; D. Fugazza; N. Gehrels; A. Gomboc; R. Harrison; H. Hanayama; J. Japelj; J. Kennea; D. Kopac; C. Kouveliotou; D. Kuroda; A. Levan; D. Malesani; F. Marshall; J. Nousek; P. O’Brien; J. P. Osborne; C. Pagani; K. L. Page; M. Page; M. Perri; T. Pritchard; P. Romano; Y. Saito; B. Sbarufatti; R. Salvaterra; I. Steele; N. Tanvir; G. Vianello; B. Wiegand; K. Wiersema; Y. Yatsu; T. Yoshii; G. Tagliaferri
<jats:title>Bright Lights</jats:title> <jats:p> Gamma-ray bursts (GRBs), bright flashes of gamma-ray light, are thought to be associated with the collapse of massive stars. GRB 130427A was detected on 27 April 2013, and it had the longest gamma-ray duration and one of the largest isotropic energy releases observed to date (see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="34" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248522">Fynbo</jats:related-article> </jats:bold> ). <jats:bold> Ackermann <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="42" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242353">42</jats:related-article> , published online 21 November) report data obtained with the Fermi Gamma-Ray Space Telescope, which reveal a high-energy spectral component that cannot be accounted for by the standard external shock synchrotron radiation model. <jats:bold> Vestrand <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="38" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242316">38</jats:related-article> , published online 21 November) report the detection of an extremely bright flash of visible light and unexpected similarities between the variations of optical light and the highest-energy gamma rays that indicate a common origin. A detailed analysis of the first pulse of GRB 130427A by <jats:bold> Preece <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="51" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242302">51</jats:related-article> , published online 21 November) suggests that existing models cannot explain all the observed spectral and temporal behaviors simultaneously. <jats:bold> Maselli <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="48" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242279">48</jats:related-article> , published online 21 November) present x-ray and optical light curves of the burst's prompt emission as well as of its afterglow as recorded by the Swift satellite and a range of ground-based telescopes. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 48-51
The First Pulse of the Extremely Bright GRB 130427A: A Test Lab for Synchrotron Shocks
R. Preece; J. Michael Burgess; A. von Kienlin; P. N. Bhat; M. S. Briggs; D. Byrne; V. Chaplin; W. Cleveland; A. C. Collazzi; V. Connaughton; A. Diekmann; G. Fitzpatrick; S. Foley; M. Gibby; M. Giles; A. Goldstein; J. Greiner; D. Gruber; P. Jenke; R. M. Kippen; C. Kouveliotou; S. McBreen; C. Meegan; W. S. Paciesas; V. Pelassa; D. Tierney; A. J. van der Horst; C. Wilson-Hodge; S. Xiong; G. Younes; H.-F. Yu; M. Ackermann; M. Ajello; M. Axelsson; L. Baldini; G. Barbiellini; M. G. Baring; D. Bastieri; R. Bellazzini; E. Bissaldi; E. Bonamente; J. Bregeon; M. Brigida; P. Bruel; R. Buehler; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; C. Cecchi; E. Charles; A. Chekhtman; J. Chiang; G. Chiaro; S. Ciprini; R. Claus; J. Cohen-Tanugi; L. R. Cominsky; J. Conrad; F. D'Ammando; A. de Angelis; F. de Palma; C. D. Dermer; R. Desiante; S. W. Digel; L. Di Venere; P. S. Drell; A. Drlica-Wagner; C. Favuzzi; A. Franckowiak; Y. Fukazawa; P. Fusco; F. Gargano; N. Gehrels; S. Germani; N. Giglietto; F. Giordano; M. Giroletti; G. Godfrey; J. Granot; I. A. Grenier; S. Guiriec; D. Hadasch; Y. Hanabata; A. K. Harding; M. Hayashida; S. Iyyani; T. Jogler; G. Jóhannesson; T. Kawano; J. Knödlseder; D. Kocevski; M. Kuss; J. Lande; J. Larsson; S. Larsson; L. Latronico; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; M. Mayer; M. N. Mazziotta; P. F. Michelson; T. Mizuno; M. E. Monzani; E. Moretti; A. Morselli; S. Murgia; R. Nemmen; E. Nuss; T. Nymark; M. Ohno; T. Ohsugi; A. Okumura; N. Omodei; M. Orienti; D. Paneque; J. S. Perkins; M. Pesce-Rollins; F. Piron; G. Pivato; T. A. Porter; J. L. Racusin; S. Rainò; R. Rando; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; S. Ritz; M. Roth; F. Ryde; A. Sartori; J. D. Scargle; A. Schulz; C. Sgrò; E. J. Siskind; G. Spandre; P. Spinelli; D. J. Suson; H. Tajima; H. Takahashi; J. G. Thayer; J. B. Thayer; L. Tibaldo; M. Tinivella; D. F. Torres; G. Tosti; E. Troja; T. L. Usher; J. Vandenbroucke; V. Vasileiou; G. Vianello; V. Vitale; M. Werner; B. L. Winer; K. S. Wood; S. Zhu
<jats:title>Bright Lights</jats:title> <jats:p> Gamma-ray bursts (GRBs), bright flashes of gamma-ray light, are thought to be associated with the collapse of massive stars. GRB 130427A was detected on 27 April 2013, and it had the longest gamma-ray duration and one of the largest isotropic energy releases observed to date (see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="34" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248522">Fynbo</jats:related-article> </jats:bold> ). <jats:bold> Ackermann <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="42" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242353">42</jats:related-article> , published online 21 November) report data obtained with the Fermi Gamma-Ray Space Telescope, which reveal a high-energy spectral component that cannot be accounted for by the standard external shock synchrotron radiation model. <jats:bold> Vestrand <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="38" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242316">38</jats:related-article> , published online 21 November) report the detection of an extremely bright flash of visible light and unexpected similarities between the variations of optical light and the highest-energy gamma rays that indicate a common origin. A detailed analysis of the first pulse of GRB 130427A by <jats:bold> Preece <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="51" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242302">51</jats:related-article> , published online 21 November) suggests that existing models cannot explain all the observed spectral and temporal behaviors simultaneously. <jats:bold> Maselli <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="48" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242279">48</jats:related-article> , published online 21 November) present x-ray and optical light curves of the burst's prompt emission as well as of its afterglow as recorded by the Swift satellite and a range of ground-based telescopes. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 51-54
Exciton Liquid in Coupled Quantum Wells
Michael Stern; Vladimir Umansky; Israel Bar-Joseph
<jats:title>Exciton Liquid</jats:title> <jats:p> Excitons, bound states of electrons and holes (states “vacated†by electrons), can be found in semiconductors and have long been predicted to form correlated phases at sufficiently large densities and low temperatures. <jats:bold> Stern <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="55" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1243409">55</jats:related-article> ) studied the behavior of spatially indirect excitons, which consist of electrons and holes residing in spatially separated, but coupled, quantum wells. The excitons were created through a combination of photoexcitation and electric gating. At high enough laser power and low enough temperatures, a new phase with a distinct photoluminescence signature appeared with behavior consistent with that of a classical liquid of excitons. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 55-57
First-Photon Imaging
Ahmed Kirmani; Dheera Venkatraman; Dongeek Shin; Andrea Colaço; Franco N. C. Wong; Jeffrey H. Shapiro; Vivek K Goyal
<jats:title>Computing an Image</jats:title> <jats:p> Firing off a burst of laser pulses and detecting the back-reflected photons is a widely used method for constructing three-dimensional (3D) images of a scene. <jats:bold> Kirmani <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="58" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1246775">58</jats:related-article> , published online 29 November) describe an active imaging method in which pulsed laser light raster scans a scene and a single-photon detector is used to detect the first photon of the back-reflected laser light. Exploiting spatial correlations of photons scattered from different parts of the scene allows computation of a 3D image. Importantly, for biological applications, the technique allows the laser power to be reduced without sacrificing image quality. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 58-61
Direct Stereospecific Synthesis of Unprotected N-H and N-Me Aziridines from Olefins
Jawahar L. Jat; Mahesh P. Paudyal; Hongyin Gao; Qing-Long Xu; Muhammed Yousufuddin; Deepa Devarajan; Daniel H. Ess; László Kürti; John R. Falck
<jats:title>Unadorned Aziridines</jats:title> <jats:p> Multiple catalytic methods have been developed to make aziridines—strained triangular carbon-nitrogen-carbon rings that function as versatile synthetic intermediates. However, the majority require protection of the nitrogen precursor with a sulfonyl group that is subsequently inconvenient to remove. <jats:bold> Jat <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="61" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1245727">61</jats:related-article> ; see the Perspective by <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="33" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248166"> <jats:bold>Türkmen and Aggarwal</jats:bold> </jats:related-article> ) used a hydroxylamine derivative as the nitrogen source together with an established rhodium catalyst to prepare a wide range of unprotected aziridines, with nitrogen bonded simply to hydrogen or a methyl group. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 61-65
Tunable Electrical Conductivity in Metal-Organic Framework Thin-Film Devices
A. Alec Talin; Andrea Centrone; Alexandra C. Ford; Michael E. Foster; Vitalie Stavila; Paul Haney; R. Adam Kinney; Veronika Szalai; Farid El Gabaly; Heayoung P. Yoon; François Léonard; Mark D. Allendorf
<jats:title>Guests for Conductors</jats:title> <jats:p> Thin films of metal-organic framework (MOF) compounds are generally poor conductors because the linking organic groups are usually insulators with little π-orbital conjugation. <jats:bold> Talin <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="66" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1246738">66</jats:related-article> , published online 5 December) show that infiltrating films of the copper-based MOF HKUST-1 with the conjugated organic molecule 7,7,8,8-tetracyanoquinododimethane created an air-stable material with conductivities as high as 7 siemens per meter. </jats:p>
Palabras clave: Multidisciplinary.
Pp. 66-69
Two Y Genes Can Replace the Entire Y Chromosome for Assisted Reproduction in the Mouse
Yasuhiro Yamauchi; Jonathan M. Riel; Zoia Stoytcheva; Monika A. Ward
<jats:title>Why, Oh Y?</jats:title> <jats:p> The mammalian Y chromosome is a symbol of maleness and encodes genes important for male reproduction. Various deletions of the Y chromosome result in sperm defects and infertility. When haploid male germ cells were injected directly into oocytes, <jats:bold> Yamauchi <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="69" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1242544">69</jats:related-article> , published online 21 November; see the Perspective by <jats:bold> <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6166" page="32" related-article-type="in-this-issue" vol="343" xlink:href="10.1126/science.1248486">Capel</jats:related-article> </jats:bold> ) found that living offspring could be derived from male mice whose Y chromosome contribution was limited to only two genes. These two genes are the testis determinant factor <jats:italic>Sry</jats:italic> and the spermatogonial proliferation factor <jats:italic>Eif2s3y</jats:italic> . </jats:p>
Palabras clave: Multidisciplinary.
Pp. 69-72