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  • 1
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    Depth perception from image defocus in a jumping spider (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-01-28
    Description: The principal eyes of jumping spiders have a unique retina with four tiered photoreceptor layers, on each of which light of different wavelengths is focused by a lens with appreciable chromatic aberration. We found that all photoreceptors in both the deepest and second-deepest layers contain a green-sensitive visual pigment, although green light is only focused on the deepest layer. This mismatch indicates that the second-deepest layer always receives defocused images, which contain depth information of the scene in optical theory. Behavioral experiments revealed that depth perception in the spider was affected by the wavelength of the illuminating light, which affects the amount of defocus in the images resulting from chromatic aberration. Therefore, we propose a depth perception mechanism based on how much the retinal image is defocused.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nagata, Takashi -- Koyanagi, Mitsumasa -- Tsukamoto, Hisao -- Saeki, Shinjiro -- Isono, Kunio -- Shichida, Yoshinori -- Tokunaga, Fumio -- Kinoshita, Michiyo -- Arikawa, Kentaro -- Terakita, Akihisa -- New York, N.Y. -- Science. 2012 Jan 27;335(6067):469-71. doi: 10.1126/science.1211667.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Geosciences, Graduate School of Science, Osaka City University, Osaka, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22282813" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cues ; Depth Perception ; Fixation, Ocular ; Light ; Locomotion ; Opsins/analysis/physiology ; Photoreceptor Cells, Invertebrate/chemistry/*physiology ; Predatory Behavior ; Spiders/*physiology ; Vision, Ocular
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    MicroRNA-92a controls angiogenesis and functional recovery of ischemic tissues in mice (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-23
    Description: MicroRNAs (miRs) are small noncoding RNAs that regulate gene expression by binding to target messenger RNAs (mRNAs), leading to translational repression or degradation. Here, we show that the miR-17approximately92 cluster is highly expressed in human endothelial cells and that miR-92a, a component of this cluster, controls the growth of new blood vessels (angiogenesis). Forced overexpression of miR-92a in endothelial cells blocked angiogenesis in vitro and in vivo. In mouse models of limb ischemia and myocardial infarction, systemic administration of an antagomir designed to inhibit miR-92a led to enhanced blood vessel growth and functional recovery of damaged tissue. MiR-92a appears to target mRNAs corresponding to several proangiogenic proteins, including the integrin subunit alpha5. Thus, miR-92a may serve as a valuable therapeutic target in the setting of ischemic disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bonauer, Angelika -- Carmona, Guillaume -- Iwasaki, Masayoshi -- Mione, Marina -- Koyanagi, Masamichi -- Fischer, Ariane -- Burchfield, Jana -- Fox, Henrik -- Doebele, Carmen -- Ohtani, Kisho -- Chavakis, Emmanouil -- Potente, Michael -- Tjwa, Marc -- Urbich, Carmen -- Zeiher, Andreas M -- Dimmeler, Stefanie -- New York, N.Y. -- Science. 2009 Jun 26;324(5935):1710-3. doi: 10.1126/science.1174381. Epub 2009 May 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe-University Frankfurt, 60590 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19460962" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis/drug effects ; Down-Regulation ; Endothelial Cells/*metabolism ; Gene Expression Profiling ; Hindlimb/blood supply ; Humans ; Integrin alpha5/genetics/metabolism ; Ischemia/drug therapy/metabolism/pathology/*physiopathology ; Mice ; Mice, Inbred C57BL ; MicroRNAs/antagonists & inhibitors/*metabolism ; Muscle, Skeletal/metabolism ; Myocardial Infarction/metabolism/pathology/*physiopathology ; Myocardium/metabolism ; *Neovascularization, Physiologic ; Oligoribonucleotides/pharmacology/therapeutic use ; RNA, Messenger/genetics/metabolism ; Regional Blood Flow ; Up-Regulation ; Ventricular Function, Left/drug effects ; Zebrafish
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
    Electronic Resource
    Electronic Resource
    Angular dependence of the phosphorescence polarization spectra of benzophenone at low temperature (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 2420-2421 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462042
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tangled T←S spectra of benzaldehyde in methylcyclohexane at low temperature (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 2662-2667 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: T←S phosphorescence excitation spectra of benzaldehyde and its aldehyde deuterium derivative in methylcyclohexane at 4.2 K are analyzed in terms of canonical mixture of 105 Born–Oppenheimer vibronic wave functions of the nπ* and ππ* triplet states. Two perturbation terms are employed; one accounting for vibronic interactions, and the other for direct environmental coupling interactions between T1 and T2. A good simulation of the benzaldehyde-h6 T←S spectrum is thus obtained with the zeroth order origin level of T2(ππ*) lying 675 cm−1 above the zeroth order origin of T1(nπ*). The T←S spectrum of benzaldehyde-ld1 is also approximately simulated (the zeroth order ππ* origin is located 625 cm−1 above the zeroth order nπ* origin) but with some disparities from the observed vibronic profile. For comparison, vapor phase T←S spectra are also calculated as a function of the zeroth order energy separation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455016
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  • 5
    Electronic Resource
    Electronic Resource
    Interstate couplings in the triplet manifold of 9-xanthone (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 7349-7353 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Using a heat-pulse modulation technique, phosphorescence spectra of 9-xanthone have been studied in n-pentane at 77 and 2.1 K. The three legitimate phosphorescent levels with different lifetimes are detected at 25 751, 25 766, and 25 774 cm−1 above the zero-vibrational level of the ground state. The origin of these multiple levels is explained in terms of spin–orbit interaction superimposed on environmental electrostatic coupling between T1(ππ*) and T2(nπ*). The two coupling constants obtained are: (for the spin–orbit coupling) ||〈1ξ||Hso||2η〉|| =15.70 cm−1 (ξ=x, η=y or vice versa); (for environmental direct coupling) 〈1ζ||Henv||2ζ〉 =3.14 cm−1 (ζ=x, y, or z). For comparison, the T←S phosphorescence excitation spectrum, measured in the same matrix, are in good agreement with the calculated ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455721
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  • 6
    Electronic Resource
    Electronic Resource
    Low-temperature scanning tunneling spectroscopic observation of vortex in a NbCxN1−x thin film (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1847-1849 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Scanning tunneling spectroscopic studies were performed on superconducting NbCxN1−x thin films at 4.2 K. An image of a spatial variation of a gap obtained in a magnetic field of 0.3 T showed a clear vortex lattice. Two types of the spatial variations of the local density of states around the vortex cores were observed. Type I had a normal center in the core, and a gap variation around the core was consistent with a theory for dirty limit superconductors. Type II did not have a normal center and the origin of this core is not yet clear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108393
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  • 7
    Electronic Resource
    Electronic Resource
    Relation between the cooling time in the film-growth process of YBa2Cu3O7−δ and the electrical properties of bicrystal Josephson junctions (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2183-2185 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied the film deposition condition for bicrystal Josephson junctions to obtain reliable device parameters Ic and Rn at 77 K. In addition, it was found that the cooling time in the film-growth process of YBa2Cu3O7−δ was a very important factor to determine the electrical properties of bicrystal Josephson junctions with the misorientation angle θ=36.8°. In the three regions of the cooling time as 5–6, 10–20, and more than 30 min, the junctions' Tc were above 87, 50–86, and above 86 K, and the average values of the IcRn products at 77 K were 0.12 mV, 50 μV, and 80 μV, respectively. The junction parameters and the shapes of the I–V curves were changed due to the change of the cooling time. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119035
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  • 8
    Electronic Resource
    Electronic Resource
    Simulated T 〈- S spectra of benzaldehydes as a function of the energy gap between the ^3ππ^* and ^3nπ^* levels
    Amsterdam : Elsevier
    Chemical Physics 90 (1984), S. 399-405 
    Details
    ISSN: 0301-0104
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0301-0104(84)85335-5
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  • 9
    Electronic Resource
    Electronic Resource
    Tangled 〈- S spectra of isotopic benzaldehydes
    Amsterdam : Elsevier
    Chemical Physics 92 (1985), S. 435-447 
    Details
    ISSN: 0301-0104
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0301-0104(85)85037-0
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  • 10
    Electronic Resource
    Electronic Resource
    Study of YBaCuO/Au surface electronic states using LTSTS
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 185-189 (1991), S. 2569-2570 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(91)91408-V
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