Now showing items 2125-2144 of 2210

    • Tuning the dynamic range of bacterial promoters regulated by ligand-inducible transcription factors 

      Chen, Ye; Ho, Joanne M. L.; Shis, David L.; Gupta, Chinmaya; Long, James; Wagner, Daniel S.; Ott, William; Josić, Krešimir; Bennett, Matthew R. (2018)
      One challenge for synthetic biologists is the predictable tuning of genetic circuit regulatory components to elicit desired outputs. Gene expression driven by ligand-inducible transcription factor systems must exhibit the ...
    • Tuning the Magnetic Quantum Criticality of Artificial Kondo Superlattices CeRhIn5/YbRhIn5 

      Ishii, T.; Toda, R.; Hanaoka, Y.; Tokiwa, Y.; Shimozawa, M.; Kasahara, Y.; Endo, R.; Terashima, T.; Nevidomskyy, A.H.; Shibauchi, T.; Matsuda, Y. (2016)
      The effects of reduced dimensions and the interfaces on antiferromagnetic quantum criticality are studied in epitaxial Kondo superlattices, with alternating n layers of heavy-fermion antiferromagnet CeRhIn5 and seven layers ...
    • Turning On and Off Photoinduced Electron Transfer in Fluorescent Proteins by π-Stacking, Halide Binding, and Tyr145 Mutations 

      Bogdanov, Alexey M.; Acharya, Atanu; Titelmayer, Anastasia V.; Mamontova, Anastasia V.; Bravaya, Ksenia B.; Kolomeisky, Anatoly B.; Lukyanov, Konstantin A.; Krylov, Anna I. (2016)
      Photoinduced electron transfer in fluorescent proteins from the GFP family can be regarded either as an asset facilitating new applications or as a nuisance leading to the loss of optical output. Photooxidation commonly ...
    • Turning Oscillations Into Opportunities: Lessons from a Bacterial Decision Gate 

      Schultz, Daniel; Lu, Mingyang; Stavropoulos, Trevor; Onuchic, José; Ben-Jacob, Eshel (2013)
      Sporulation vs. competence provides a prototypic example of collective cell fate determination. The decision is performed by the action of three modules: 1) A stochastic competence switch whose transition probability is ...
    • Two distinctive energy migration pathways of monolayer molecules on metal nanoparticle surfaces 

      Li, Jiebo; Qian, Huifeng; Chen, Hailong; Zhao, Zhun; Yuan, Kaijun; Chen, Guangxu; Miranda, Andrea; Guo, Xunmin; Chen, Yajing; Zheng, Nanfeng; Wong, Michael S.; Zheng, Junrong (2016)
      Energy migrations at metal nanomaterial surfaces are fundamentally important to heterogeneous reactions. Here we report two distinctive energy migration pathways of monolayer adsorbate molecules on differently sized metal ...
    • Two spatially separated phases in semiconducting Rb0.8Fe1.5S2 

      Wang, Meng; Tian, Wei; Valdivia, P.; Chi, Songxue; Bourret-Courchesne, E.; Dai, Pengcheng; Birgeneau, R. J. (2014)
      We report neutron scattering and transport measurements on semiconducting Rb0.8Fe1.5S2, a compound isostructural and isoelectronic to the well-studied A0.8FeySe2(A=K,Rb,Cs,Tl/K) superconducting systems. Both resistivity ...
    • Two-component Bose-Hubbard model in an array of cavity polaritons 

      Zhang, Yong-Chang; Zhou, Xiang-Fa; Zhou, Xingxiang; Guo, Guang-Can; Pu, Han; Zhou, Zheng-Wei (2015)
      We propose a scheme which can realize an extended two-component Bose-Hubbard model using polaritons confined in an array of optical cavities. In addition to the density-dependent interactions, this model also contains ...
    • Two-component polariton condensate in an optical microcavity 

      Zhang, Yong-Chang; Zhou, Xiang-Fa; Guo, Guang-Can; Zhou, Xingxiang; Pu, Han; Zhou, Zheng-Wei (2014)
      We present a scheme for engineering the extended two-component Bose-Hubbard model using polariton condensate supported by an optical microcavity. Compared to the usual two-component Bose-Hubbard model with only Kerr ...
    • Two-Dimensional Massless Dirac Fermions in Antiferromagnetic AFe2As2 (A=Ba,Sr) 

      Chen, Zhi-Guo; Wang, Luyang; Song, Yu; Lu, Xingye; Luo, Huiqian; Zhang, Chenglin; Dai, Pengcheng; Yin, Zhiping; Haule, Kristjan; Kotliar, Gabriel (2017)
      We report infrared studies of AFe2As2 (A=Ba, Sr), two representative parent compounds of iron-arsenide superconductors, at magnetic fields (B) up to 17.5 T. Optical transitions between Landau levels (LLs) were observed in ...
    • Two-photon photoassociative spectroscopy of ultracold 88Sr 

      Martinez de Escobar, Y.N.; Mickelson, P.G.; Pellegrini, P.; Nagel, S.B.; Traverso, A.; Yan, M.; Cote, R.; Killian, T.C. (2008-12-10)
    • Two-Step Self-Assembly of Liposome-Multidomain Peptide Nanofiber Hydrogel for Time-Controlled Release 

      Wickremasinghe, Navindee C.; Kumar, Vivek A.; Hartgerink, Jeffrey D. (2014)
      Progress in self-assembly and supramolecular chemistry has been directed toward obtaining macromolecular assemblies with higher degrees of complexity, simulating the highly structured environment in natural systems. One ...
    • Type-I superconductivity in ScGa3 and LuGa3 single crystals 

      Svanidze, E.; Morosan, E. (2012)
      We present evidence of type-I superconductivity in single crystals of ScGa3 and LuGa3, from magnetization, specific heat, and resistivity measurements: low critical temperatures Tc = 2.1–2.2 K; field-induced secondto first-order ...
    • Type-I superconductivity in YbSb2 single crystals 

      Zhao, Liang L.; Lausberg, Stefan; Kim, H.; Tanatar, M.A.; Brando, Manuel; Prozorov, R.; Morosan, E. (2012)
      We present evidence of type-I superconductivity in YbSb2 single crystals from dc and ac magnetization, heat capacity, and resistivity measurements. The critical temperature and critical field are determined to be Tc ≈ 1.3 ...
    • ULF wave derived radiation belt radial diffusion coefficients 

      Ozeke, Louis G.; Mann, Ian R.; Murphy, Kyle R.; Rae, I. Jonathan; Milling, David K.; Elkington, Scot R.; Chan, Anthony A.; Singer, Howard J. (2012)
      Waves in the ultra-low-frequency (ULF) band have frequencies which can be drift resonant with electrons in the outer radiation belt, suggesting the potential for strong interactions and enhanced radial diffusion. Previous ...
    • Ultra-High Surface Area Activated Porous Asphalt for CO2 Capture through Competitive Adsorption at High Pressures 

      Jalilov, Almaz S.; Li, Yilun; Tian, Jian; Tour, James M. (2017)
      This study reports an improved method for activating asphalt to produce ultra-high surface area porous carbons. Pretreatment of asphalt (untreated Gilsonite, uGil) at 400 °C for 3 h removes the more volatile organic compounds ...
    • Ultra-long-range Rydberg molecules in a divalent atomic system 

      DeSalvo, B.J.; Aman, J.A.; Dunning, F.B.; Killian, T.C.; Sadeghpour, H.R.; Yoshida, S.; Burgdörfer, J. (2015)
      We report the creation of ultra-long-range Sr2 molecules comprising one ground-state 5s2 1S0 atom and one atom in a 5sns 3S1 Rydberg state for n ranging from 29 to 36. Molecules are created in a trapped ultracold atomic ...
    • Ultracold neutral plasmas: recent experiments and new prospects 

      Killian, T.C.; Ashoka, V.S.; Gupta, P.; Laha, S.; Nagel, S.B.; Simien, C.E.; Kulin, S.; Rolston, S.L.; Bergeson, S.D. (2003-05-22)
    • Ultracold Nonreactive Molecules in an Optical Lattice: Connecting Chemistry to Many-Body Physics 

      Doçaj, Andris; Wall, Michael L.; Mukherjee, Rick; Hazzard, Kaden R.A. (2016)
      We derive effective lattice models for ultracold bosonic or fermionic nonreactive molecules (NRMs) in an optical lattice, analogous to the Hubbard model that describes ultracold atoms in a lattice. In stark contrast to the ...
    • Ultrafast formation of interlayer hot excitons in atomically thin MoS2/WS2ᅠheterostructures 

      Chen, Hailong; Wen, Xiewen; Zhang, Jing; Wu, Tianmin; Gong, Yongji; Zhang, Xiang; Yuan, Jiangtan; Yi, Chongyue; Lou, Jun; Ajayan, Pulickel M.; Zhuang, Wei; Zhang, Guangyu; Zheng, Junrong (2016)
      Van der Waals heterostructures composed of two-dimensional transition-metal dichalcogenides layers have recently emerged as a new family of materials, with great potential for atomically thin opto-electronic and photovoltaic ...
    • Ultrahigh-throughput generation and characterization of cellular aggregates in laser-ablated microwells of poly(dimethylsiloxane) 

      Albritton, Jacob L.; Roybal, Jonathon D.; Paulsen, Samantha J.; Calafat, Nick; Flores-Zaher, Jose A.; Farach-Carson, Mary C.; Gibbons, Don L.; Miller, Jordan S. (2016)
      Aggregates of cells, also known as multicellular aggregates (MCAs), have been used as microscale tissues in the fields of cancer biology, regenerative medicine, and developmental biology for many decades. However, small ...