ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    A valley valve and electron beam splitter (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-12-07
    Description: Developing alternative paradigms of electronics beyond silicon technology requires the exploration of fundamentally new physical mechanisms, such as the valley-specific phenomena in hexagonal two-dimensional materials. We realize ballistic valley Hall kink states in bilayer graphene and demonstrate gate-controlled current transmission in a four-kink router device. The operations of a waveguide, a valve, and a tunable electron beam splitter are demonstrated. The valley valve exploits the valley-momentum locking of the kink states and reaches an on/off ratio of 8 at zero magnetic field. A magnetic field enables a full-range tunable coherent beam splitter. These results pave a path to building a scalable, coherent quantum transportation network based on the kink states.
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Ceramide biogenesis is required for radiation-induced apoptosis in the germ line of C. elegans (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-10-04
    Description: Ceramide engagement in apoptotic pathways has been a topic of controversy. To address this controversy, we tested loss-of-function (lf) mutants of conserved genes of sphingolipid metabolism in Caenorhabditis elegans. Although somatic (developmental) apoptosis was unaffected, ionizing radiation-induced apoptosis of germ cells was obliterated upon inactivation of ceramide synthase and restored upon microinjection of long-chain natural ceramide. Radiation-induced increase in the concentration of ceramide localized to mitochondria and was required for BH3-domain protein EGL-1-mediated displacement of CED-4 (an APAF-1-like protein) from the CED-9 (a Bcl-2 family member)/CED-4 complex, an obligate step in activation of the CED-3 caspase. These studies define CEP-1 (the worm homolog of the tumor suppressor p53)-mediated accumulation of EGL-1 and ceramide synthase-mediated generation of ceramide through parallel pathways that integrate at mitochondrial membranes to regulate stress-induced apoptosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2585063/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2585063/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deng, Xinzhu -- Yin, Xianglei -- Allan, Richard -- Lu, Diane D -- Maurer, Carine W -- Haimovitz-Friedman, Adriana -- Fuks, Zvi -- Shaham, Shai -- Kolesnick, Richard -- 2R01HD42680-06/HD/NICHD NIH HHS/ -- CA105125-03/CA/NCI NIH HHS/ -- CA85704/CA/NCI NIH HHS/ -- R01 CA085704/CA/NCI NIH HHS/ -- R01 CA085704-09/CA/NCI NIH HHS/ -- R01 HD042680/HD/NICHD NIH HHS/ -- R01 HD042680-07/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2008 Oct 3;322(5898):110-5. doi: 10.1126/science.1158111.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Signal Transduction, Memorial Sloan-Kettering Cancer Center (MSKCC), New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18832646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Caenorhabditis elegans/*cytology/genetics/*metabolism/physiology ; Caenorhabditis elegans Proteins/genetics/*metabolism ; Calcium-Binding Proteins/genetics/metabolism ; Ceramides/biosynthesis/*metabolism/pharmacology ; Genes, Helminth ; Germ Cells/*cytology/metabolism/radiation effects ; Mitochondria/metabolism ; Mitochondrial Membranes/metabolism ; Mutation ; Nuclear Envelope/metabolism ; Oxidoreductases/genetics/metabolism ; Proto-Oncogene Proteins c-abl/genetics/metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; *Radiation, Ionizing ; Repressor Proteins/metabolism ; Tumor Suppressor Protein p53/metabolism
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Complete resequencing of 40 genomes reveals domestication events and genes in silkworm (Bombyx) (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-29
    Description: A single-base pair resolution silkworm genetic variation map was constructed from 40 domesticated and wild silkworms, each sequenced to approximately threefold coverage, representing 99.88% of the genome. We identified ~16 million single-nucleotide polymorphisms, many indels, and structural variations. We find that the domesticated silkworms are clearly genetically differentiated from the wild ones, but they have maintained large levels of genetic variability, suggesting a short domestication event involving a large number of individuals. We also identified signals of selection at 354 candidate genes that may have been important during domestication, some of which have enriched expression in the silk gland, midgut, and testis. These data add to our understanding of the domestication processes and may have applications in devising pest control strategies and advancing the use of silkworms as efficient bioreactors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951477/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951477/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xia, Qingyou -- Guo, Yiran -- Zhang, Ze -- Li, Dong -- Xuan, Zhaoling -- Li, Zhuo -- Dai, Fangyin -- Li, Yingrui -- Cheng, Daojun -- Li, Ruiqiang -- Cheng, Tingcai -- Jiang, Tao -- Becquet, Celine -- Xu, Xun -- Liu, Chun -- Zha, Xingfu -- Fan, Wei -- Lin, Ying -- Shen, Yihong -- Jiang, Lan -- Jensen, Jeffrey -- Hellmann, Ines -- Tang, Si -- Zhao, Ping -- Xu, Hanfu -- Yu, Chang -- Zhang, Guojie -- Li, Jun -- Cao, Jianjun -- Liu, Shiping -- He, Ningjia -- Zhou, Yan -- Liu, Hui -- Zhao, Jing -- Ye, Chen -- Du, Zhouhe -- Pan, Guoqing -- Zhao, Aichun -- Shao, Haojing -- Zeng, Wei -- Wu, Ping -- Li, Chunfeng -- Pan, Minhui -- Li, Jingjing -- Yin, Xuyang -- Li, Dawei -- Wang, Juan -- Zheng, Huisong -- Wang, Wen -- Zhang, Xiuqing -- Li, Songgang -- Yang, Huanming -- Lu, Cheng -- Nielsen, Rasmus -- Zhou, Zeyang -- Wang, Jian -- Xiang, Zhonghuai -- Wang, Jun -- R01 HG003229/HG/NHGRI NIH HHS/ -- R01 HG003229-05/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):433-6. doi: 10.1126/science.1176620. Epub 2009 Aug 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Key Sericultural Laboratory of Agricultural Ministry, College of Biotechnology, Southwest University, Chongqing 400715, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19713493" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bombyx/classification/*genetics ; Digestive System/metabolism ; Exocrine Glands/metabolism ; Female ; Gene Expression ; *Genes, Insect ; *Genetic Variation ; *Genome, Insect ; INDEL Mutation ; Linkage Disequilibrium ; Male ; Phylogeny ; Polymorphism, Single Nucleotide ; Principal Component Analysis ; Selection, Genetic ; *Sequence Analysis, DNA ; Testis/metabolism
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Photonic spin Hall effect at metasurfaces (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-03-23
    Description: The spin Hall effect (SHE) of light is very weak because of the extremely small photon momentum and spin-orbit interaction. Here, we report a strong photonic SHE resulting in a measured large splitting of polarized light at metasurfaces. The rapidly varying phase discontinuities along a metasurface, breaking the axial symmetry of the system, enable the direct observation of large transverse motion of circularly polarized light, even at normal incidence. The strong spin-orbit interaction deviates the polarized light from the trajectory prescribed by the ordinary Fermat principle. Such a strong and broadband photonic SHE may provide a route for exploiting the spin and orbit angular momentum of light for information processing and communication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yin, Xiaobo -- Ye, Ziliang -- Rho, Junsuk -- Wang, Yuan -- Zhang, Xiang -- New York, N.Y. -- Science. 2013 Mar 22;339(6126):1405-7. doi: 10.1126/science.1231758.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Science Foundation Nanoscale Science and Engineering Center, 3112 Etcheverry Hall, University of California at Berkeley, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23520105" target="_blank"〉PubMed〈/a〉
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Phase mismatch-free nonlinear propagation in optical zero-index materials (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-12-07
    Description: Phase matching is a critical requirement for coherent nonlinear optical processes such as frequency conversion and parametric amplification. Phase mismatch prevents microscopic nonlinear sources from combining constructively, resulting in destructive interference and thus very low efficiency. We report the experimental demonstration of phase mismatch-free nonlinear generation in a zero-index optical metamaterial. In contrast to phase mismatch compensation techniques required in conventional nonlinear media, the zero index eliminates the need for phase matching, allowing efficient nonlinear generation in both forward and backward directions. We demonstrate phase mismatch-free nonlinear generation using intrapulse four-wave mixing, where we observed a forward-to-backward nonlinear emission ratio close to unity. The removal of phase matching in nonlinear optical metamaterials may lead to applications such as multidirectional frequency conversion and entangled photon generation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suchowski, Haim -- O'Brien, Kevin -- Wong, Zi Jing -- Salandrino, Alessandro -- Yin, Xiaobo -- Zhang, Xiang -- New York, N.Y. -- Science. 2013 Dec 6;342(6163):1223-6. doi: 10.1126/science.1244303.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NSF Nanoscale Science and Engineering Center, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24311687" target="_blank"〉PubMed〈/a〉
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Edge nonlinear optics on a MoS(2) atomic monolayer (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-05-03
    Description: The translational symmetry breaking of a crystal at its surface may form two-dimensional (2D) electronic states. We observed one-dimensional nonlinear optical edge states of a single atomic membrane of molybdenum disulfide (MoS2), a transition metal dichalcogenide. The electronic structure changes at the edges of the 2D crystal result in strong resonant nonlinear optical susceptibilities, allowing direct optical imaging of the atomic edges and boundaries of a 2D material. Using the symmetry of the nonlinear optical responses, we developed a nonlinear optical imaging technique that allows rapid and all-optical determination of the crystal orientations of the 2D material at a large scale. Our technique provides a route toward understanding and making use of the emerging 2D materials and devices.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yin, Xiaobo -- Ye, Ziliang -- Chenet, Daniel A -- Ye, Yu -- O'Brien, Kevin -- Hone, James C -- Zhang, Xiang -- New York, N.Y. -- Science. 2014 May 2;344(6183):488-90. doi: 10.1126/science.1250564.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NSF Nanoscale Science and Engineering Center, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24786072" target="_blank"〉PubMed〈/a〉
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    A valley valve and electron beam splitter (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018
    Description: 〈p〉Developing alternative paradigms of electronics beyond silicon technology requires the exploration of fundamentally new physical mechanisms, such as the valley-specific phenomena in hexagonal two-dimensional materials. We realize ballistic valley Hall kink states in bilayer graphene and demonstrate gate-controlled current transmission in a four-kink router device. The operations of a waveguide, a valve, and a tunable electron beam splitter are demonstrated. The valley valve exploits the valley-momentum locking of the kink states and reaches an on/off ratio of 8 at zero magnetic field. A magnetic field enables a full-range tunable coherent beam splitter. These results pave a path to building a scalable, coherent quantum transportation network based on the kink states.〈/p〉
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Chiral Majorana fermion modes in a quantum anomalous Hall insulator-superconductor structure (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-07-21
    Description: Majorana fermion is a hypothetical particle that is its own antiparticle. We report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations of magnetization reversals, giving a distinct signature of the Majorana fermion modes. This transport signature is reproducible over many magnetic field sweeps and appears at different temperatures. This finding may open up an avenue to control Majorana fermions for implementing robust topological quantum computing.
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Extracellular vesicles derived from ODN-stimulated macrophages transfer and activate Cdc42 in recipient cells and thereby increase cellular permissiveness to EV uptake (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Endosomal Toll-like receptors (TLRs) mediate intracellular innate immunity via the recognition of DNA and RNA sequences. Recent work has reported a role for extracellular vesicles (EVs), known to transfer various nucleic acids, in uptake of TLR-activating molecules, raising speculation about possible roles of EVs in innate immune surveillance. Whether EV-mediated uptake is a general mechanism, however, was unresolved; and the molecular machinery that might be involved was unknown. We show that, when macrophages are stimulated with the TLR9 agonist CpG oligodeoxynucleotides (ODN), the secreted EVs transport ODN into naïve macrophages and induce the release of chemokine TNF-α. In addition, these EVs transfer Cdc42 into recipient cells, resulting in further enhancement of their cellular uptake. Transport of ODN and Cdc42 from TLR9-activated macrophages to naïve cells via EVs exerts synergetic effects in propagation of the intracellular immune response, suggesting a general mechanism of EV-mediated uptake of pathogen-associated molecular patterns.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Time perception deficits and its dose-dependent effect in methamphetamine dependents with short-term abstinence (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Intake of addictive substances acutely modifies dopaminergic transmission in the striatum and prefrontal cortex, which is the neural substrate underlying time processing. However, the persistent effects of methamphetamine (meth) abuse (e.g., during abstinence) on temporal processing have not been fully elucidated. Here, we recruited different samples in two experiments. We first compared the potential differences in motor timing between healthy controls and meth dependents with varied length of abstinence and then examined the ability of perceptual timing between the healthy subjects and the meth group at short abstinence. We found that motor timing, but not perceptual timing, was altered in meth dependents, which persisted for at least 3 months of abstinence. Dose-dependent effects on time perception were only observed when short-term abstinent meth abusers processed long time intervals. We conclude that time perception alteration in meth dependents is task specific and dose dependent.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...