Biomolecular Materials Program Meeting Sponsored by the Division of Materials Sciences and Engineering (DMS&E) in the Office of Basic Energy Sciences (BES) of the U

Total Page:16

File Type:pdf, Size:1020Kb

Biomolecular Materials Program Meeting Sponsored by the Division of Materials Sciences and Engineering (DMS&E) in the Office of Basic Energy Sciences (BES) of the U BiomolecularBiomolecular MaterialsMaterials ProgramProgram MeetingMeeting -- 20052005 August 25 – 28, 2005, Airlie Conference Center, Warrenton, VA coexistence Membrane charge density Global [Zn2+] Division of Materials Sciences and Engineering Cover Top Left: Self-assembly of peptide amphiphiles into bioactive nanofibers presenting biological signals at Van der Waals density. Courtesy: Samuel Stupp (Northwestern University) Top Right: Carbohydrate-functionalized polymers designed to mimic the struc- tures of mucin glycoproteins assembled on carbon nanotubes. Courtesy: Carolyn Bertozzi and Alex Zettl (Lawrence Berkeley National Laboratory) Bottom Left: Hierarchy of ion-mediated interactions expressed in self-assembled structures of DNA-anionic membrane complexes. Courtesy: Gerard Wong (The Frederick Seitz Materials Research Laboratory, University of Illinois-Urbana Champaign) Bottom Right: Proteins occluded within these star-burst structures of silica, made by a sponge, have revealed a novel route to the low-temperature catalytic nanofabrication of silica, silicones and semiconductors for energy applications. Courtesy: Daniel Morse (University of California-Santa Barbara) This document describes activities performed under contract number DE-AC05-00OR22750 between the U.S. Department of Energy and Oak Ridge Associated Universities. Foreword This volume highlights the scientific content of the 2005 Biomolecular Materials Program Meeting sponsored by the Division of Materials Sciences and Engineering (DMS&E) in the Office of Basic Energy Sciences (BES) of the U. S. Department of Energy (DOE). This meeting is the first in a series of research theme based Contractors’ Meetings and will focus on BES-funded research at the intersection of physical sciences and biology. The meeting will feature research that cuts across several DMS&E core research program areas. Biomolecular Materials is a relatively new but growing Core Research Activity (CRA) component in DMS&E. This activity formally came into existence following the recommendations of a workshop sponsored by the Basic Energy Sciences Advisory Committee to explore the potential impact of biology on the physical sciences including, in particular the materials and chemical sciences. The major programmatic emphasis is on exploring the molecules, structures, processes and concepts of the biological world that could be used or mimicked in designing novel materials, processes or devices with potential energy significance in support of the DOE missions. The purpose of the Biomolecular Materials Program Meeting is to bring together researchers funded by BES in this new and emerging research area, to facilitate the exchange of new results and research highlights, to foster new ideas and collaborations among the participants, and to identify needs of the research community. The meeting will also help DMS&E in assessing the state of the program, charting future directions and identifying programmatic needs. The agenda reflects some of the major research themes covered within the broad, expanding field of biomolecular materials. Many of the BES Contractors’ Meetings are passing the quarter-century mark in longevity and are very highly regarded by their participants. We sincerely hope that the Biomolecular Materials Program Meeting will join the others in keeping with the long- standing BES tradition. We thank all of the invited speakers and meeting attendees for their active participation in sharing their ideas and research results. The dedicated efforts of the Meeting Chairs, Mark Alper and Dan Morse, in organizing and coordinating the meeting are sincerely appreciated. Thanks also go to Christie Ashton from DMS&E and Brian Herndon and Kellye Sliger from Oak Ridge Institute of Science and Education for their fine work in taking care of logistical aspects of the meeting. Arvind Kini and Tim Fitzsimmons Division of Materials Sciences and Engineering Office of Basic Energy Sciences Office of Science U.S. Department of Energy i U. S. Dept of Energy Office of Basic Energy Sciences Biomolecular Materials Program Meeting August 25-28, 2005 Mark Alper (LBNL) and Dan Morse (UC-SB), Meeting Chairs THURSDAY, AUGUST 25 3:00 – 6:00 pm Registration 5:00 – 6:00 pm Reception (No Host) 6:00 – 7:00 pm ***** Dinner ***** 7:30 pm Introductory Remarks Harriet Kung, Director, Division of Materials Science and Engineering Arvind Kini Program Manager, Materials Chemistry and Biomolecular Materials Session I Self-assembly I – Complex Structures and Systems Chair: Mark Alper, LBNL 8:00 – 8:30 pm Samuel Stupp, Northwestern The Expanding Field of Biomolecular Materials 8:30 -- 9:00 pm Atul Parikh, UC-Davis Patterning and Structure Formation in Fluid Lipid Membranes 9:00 – 9:30 pm Hiroshi Matsui, Hunter College Bionanotechnology Approach in Material Synthesis and Device Fabrication by Applying Peptide/Protein Assemblies 9:30 – 10:00 pm Joanna Aizenberg, Lucent (Invited Talk) Controlling the inorganic crystallization at the organic interface: Lessons from biomineralization iii FRIDAY, AUGUST 26 7:00 – 8:00 am Breakfast Session II Self-assembly II – Understanding and Controlling Self- assembly Chair: Dan Morse, UC-SB 8:30 – 9:00 am George Whitesides, Harvard Dynamic and Static Self-assembly of Meso-scale Objects 9:00 – 9:30 am Paul Alivisatos, LBNL Programmable assembly of nanocrystals using DNA 9:30 – 10:00 am Jennifer Lewis, FS-MRL Bio-Inspired Assembly of 3-D Micro-Periodic Structures 10:00 – 10:30 am ***** Break ***** 10:30 – 11:00 am Zhigang Suo, Harvard Electric field directed motion of molecules on solid surfaces 11:00 – 11:30 am Gordon Osbourn, SNL-NM Programming Dynamic Self-Assembly: Theory and Simulations 11:30 – 12:00 Noon Brian Crane, Cornell (Invited Talk) Structures and Activities of Protein Complexes that Mediate Bacterial Chemotaxis 12:00 Noon –1:00 pm ***** Lunch ***** 1:00 – 4:00 pm Time for Interactions & Discussions 4:00 – 6:00 pm Poster Session I 6:00 – 7:00 pm ***** Dinner ***** Session III Bioinspired/Biomimetic Materials and Assemblies Chair: Yok Chen, DOE 7:00 – 7:30 pm Kent Blasie, U-Penn Design & Structural Characterization of Amphiphilic 4- Helix Bundle Peptides for Novel Electronic and Photonic Biomolecular Materials iv 7:30 -- 8:00 pm Andy Shreve, LANL Control of Optical Properties of Materials Using Bioinspired Assemblies 8:00 – 8:30 pm Zhibin Guan, UC-Irvine Biomimetic Polymer Design at the Interface of Chemistry and Biology 8:30 – 9:00 pm George Bachand, SNL-NM Active Assembly of Dynamic and Adaptable Materials 9:00 – 11:00 pm Continuation of Poster Session I SATURDAY, AUGUST 27 7:00 – 8:00 am Breakfast Session IV Topic: New Tools and Techniques Chair: Richard Kelley 8:30 – 9:00 am Sunil Sinha, UC-SD Using X-rays and Neutrons to probe structual inhomogeneities in membranes and organic films 9:00 – 9:30 am Sow-Hsin Chen, MIT Inelastic X-Ray Scattering Studies of Phonon Propagation and Damping in Biomolecular Assemblies 9:30 – 10:00 am Ben Ocko, BNL X-ray scattering studies of soft matter and biomolecular materials 10:00 – 10:30 am ***** Break ***** 10:30 – 11:00 am Steve Granick, FS-MRL Integrated Platforms for Optical and Force Microscopy 11:00 – 11:30 am Jim DeYoreo, LLNL (Invited Talk) The scanned probe microscope as a platform for in situ imaging, measurement, and manipulation of biomolecular systems 11:30 – 12:00 Noon Janos Kirz, ALS, LBNL (Invited Talk) Toward Structural Biology using the LCLS v 12:00 Noon –1:00 pm ***** Lunch ***** 1:00 – 4:00 pm Time for Interactions and Discussions 4:00 – 6:00 pm Poster Session II 6:00 – 7:00 pm ***** Dinner ***** Session V Biomolecular Functional Systems: Bio/Non-bio Integration Chair: Tim Fitzsimmons, DOE 7:00 – 7:30 pm Jeff Brinker, SNL-NM Cell-Directed Assembly of the Bio-Nano Interface 7:30 – 8:00 pm Millie Firestone (ANL) and Mike Wasielewski (Northwestern) Controlling the Photophysics of Protein Arrays in Thermoresponsive Soft Materials 8:00 – 8:30 pm Dirk Trauner, LBNL Tinkering with Nature's Molecular Machines: Development of Light-Activated Ion Channels 8:30 -- 9:00 pm Jim Heath, Caltech The nano/bio interface for in vitro and in vivo diagnostics of health and disease 9:00 – 11:00 pm Continuation of Poster Session II SUNDAY, AUGUST 28 7:00 – 8:00 am Breakfast Session VI Topic: Biotemplated Materials Synthesis Chair: Arvind Kini, DOE 8:00 – 8:30 am Dan Morse, UC-SB Biomolecular Mechanisms Reveal New Routes to Novel Nanostructured Materials for Energy Applications 8:30 -- 9:00 am Surya Mallapragada, Ames Macromolecular templates for self-assembly of bioinspired nanocomposites vi 9:00 – 9:30 am Matt Francis, LBNL Synthetically Modified Viral Capsids: Building Blocks for Nanoscale Materials 9:30 -- 10:00 am Yongsoon Shin, PNNL Replication of Carbohydrates into Hierarchically- Structured Ceramics 10:00 -- 10:30 am ***** Break ***** 10:30 -- 11:00 am Dan Feldheim, NCSU RNA Mediated Synthesis of Catalysts for Hydrogen Production and Oxidation 11:00 – 11:30 am George Crabtree, ANL Basic Research Needs for Solar Energy Utilization 11:30 – 11:45 am Closing Remarks Mark Alper and Dan Morse, Meeting Chairs Arvind Kini and Tim Fitzsimmons, Meeting Organizers 11:45 am ***** Lunch and Adjourn ***** (Optional Box Lunches Available) vii Table of Contents Foreword......................................................................................................................................... i Agenda .......................................................................................................................................... iii
Recommended publications
  • Neutron Instrumentation
    Neutron Instrumentation Oxford School on Neutron Scattering 5th September 2019 Ken Andersen Summary • Neutron instrument concepts – time-of-flight – Bragg’s law • Neutron Instrumentation – guides – monochromators – shielding – detectors – choppers – sample environment – collimation • Neutron diffractometers • Neutron spectrometers 2 The time-of-flight (TOF) method distance Δt time Diffraction: Bragg’s Law Diffraction: Bragg’s Law Diffraction: Bragg’s Law Diffraction: Bragg’s Law Diffraction: Bragg’s Law Diffraction: Bragg’s Law λ = 2d sinθ Diffraction: Bragg’s Law λ = 2d sinθ 2θ Reflection: Snell’s Law incident reflected n=1 θ θ’ refracted n’<1 Reflection: Snell’s Law incident reflected n=1 θ θ’ refracted θ’=0: critical angle of total n’<1 reflection θc Reflection: Snell’s Law incident reflected n=1 θ θ’ refracted θ’=0: critical angle of total n’<1 reflection θc cosθc = n' n = n' Nλ2b n' = 1− ⇒ θc = λ Nb/π 2π ≈ − 2 cosθc 1 θc 2 Reflection: Snell’s Law incident reflected n=1 θ θ’ refracted θ’=0: critical angle of total n’<1 reflection θc cosθc = n' n = n' 2 for natural Ni, Nλ b n' = 1− ⇒ θc = λ Nb/π 2π θc = λ[Å]×0.1° cosθ ≈ 1− θ2 2 c c -1 Qc = 0.0218 Å Neutron Supermirrors Courtesy of J. Stahn, PSI Neutron Supermirrors Courtesy of J. Stahn, PSI Neutron Supermirrors Courtesy of J. Stahn, PSI Neutron Supermirrors λ Reflection: θc(Ni) = λ[Å] × 0.10° c λ 1 Multilayer: θc(SM) = m × λ[Å] × 0.10° λ 2 λ 3 λ 4 } d 1 } d 2 } d3 } d4 18 Neutron Supermirrors λ Reflection: θc(Ni) = λ[Å] × 0.10° c λ 1 Multilayer: θc(SM) = m × λ[Å] × 0.10° λ 2
    [Show full text]
  • Observation and a Numerical Study of Gravity Waves During Tropical Cyclone Ivan (2008)
    Open Access Atmos. Chem. Phys., 14, 641–658, 2014 Atmospheric www.atmos-chem-phys.net/14/641/2014/ doi:10.5194/acp-14-641-2014 Chemistry © Author(s) 2014. CC Attribution 3.0 License. and Physics Observation and a numerical study of gravity waves during tropical cyclone Ivan (2008) F. Chane Ming1, C. Ibrahim1, C. Barthe1, S. Jolivet2, P. Keckhut3, Y.-A. Liou4, and Y. Kuleshov5,6 1Université de la Réunion, Laboratoire de l’Atmosphère et des Cyclones, UMR8105, CNRS-Météo France-Université, La Réunion, France 2Singapore Delft Water Alliance, National University of Singapore, Singapore, Singapore 3Laboratoire Atmosphères, Milieux, Observations Spatiales, UMR8190, Institut Pierre-Simon Laplace, Université Versailles-Saint Quentin, Guyancourt, France 4Center for Space and Remote Sensing Research, National Central University, Chung-Li 3200, Taiwan 5National Climate Centre, Bureau of Meteorology, Melbourne, Australia 6School of Mathematical and Geospatial Sciences, Royal Melbourne Institute of Technology (RMIT) University, Melbourne, Australia Correspondence to: F. Chane Ming ([email protected]) Received: 3 December 2012 – Published in Atmos. Chem. Phys. Discuss.: 24 April 2013 Revised: 21 November 2013 – Accepted: 2 December 2013 – Published: 22 January 2014 Abstract. Gravity waves (GWs) with horizontal wavelengths ber 1 vortex Rossby wave is suggested as a source of domi- of 32–2000 km are investigated during tropical cyclone (TC) nant inertia GW with horizontal wavelengths of 400–800 km, Ivan (2008) in the southwest Indian Ocean in the upper tropo- while shorter scale modes (100–200 km) located at northeast sphere (UT) and the lower stratosphere (LS) using observa- and southeast of the TC could be attributed to strong local- tional data sets, radiosonde and GPS radio occultation data, ized convection in spiral bands resulting from wave number 2 ECMWF analyses and simulations of the French numerical vortex Rossby waves.
    [Show full text]
  • Dolly the Sheep – the First Cloned Adult Animal
    DOLLY THE SHEEP – THE FIRST CLONED ADULT ANIMAL NEW TECHNOLOGY FOR IMPROVING LIVESTOCK From Squidonius via Wikimedia Commons In 1996, University of Edinburgh scientists celebrated the birth of Dolly the Sheep, the first mammal to be cloned using SCNT cloning is the only technology adult somatic cells. The Edinburgh team’s success followed available that enables generation of 99.8% its improvements to the single cell nuclear transfer (SCNT) genetically identical offspring from selected technique used in the cloning process. individuals of adult animals (including sterilized animals). As such, it is being Dolly became a scientific icon recognised worldwide and exploited as an efficient multiplication tool SCNT technology has spread around the world and has been to support specific breeding strategies of used to clone multiple farm animals. farm animals with exceptionally high genetic The cloning of livestock enables growing large quantities of value. the most productive, disease resistant animals, thus providing more food and other animal products. Sir Ian Wilmut (Inaugural Director of MRC Centre for Regeneration and Professor at CMVM, UoE) and colleagues worked on methods to create genetically improved livestock by manipulation of stem cells using nuclear transfer. Their research optimised interactions between the donor nucleus and the recipient cytoplasm at the time of fusion and during the first cell cycle. Nuclear donor cells were held in mitosis before being released and used as they were expected to be passing through G1 phase. CLONING IN COMMERCE, CONSERVATION OF AGRICULTURE AND PRESERVATION ANIMAL BREEDS OF LIVESTOCK DIVERSITY Cloning has been used to conserve several animal breeds in the recent past.
    [Show full text]
  • Neutron Spin Echo Spectroscopy
    Neutron Spin Echo Spectroscopy Peter Fouquet [email protected] Institut Laue-Langevin Grenoble, France Oxford Neutron School 2017 What you are supposed to learn in this tutorial 1. The length and time scales that can be studied using NSE spectroscopy 2. The measurement principle of NSE spectroscopy 3. Discrimination techniques for coherent, incoherent and magnetic dynamics 4. To which scientific problems can I apply NSE spectroscopy? NSE-Tutorial Mind Map Quantum Mechanical Model Resonance Spin-Echo Classical Model Measurement principle “4-point Echo” NSE spectroscopy Instrument Frustrated Components Magnets Bio- molecules Time/Space Map NSE around Surface the globe Diffusion Science Cases Paramagnetic Spin Echo Experiment planning and Interpretation Diffusion Glasses Polymers Models Coherent and Incoherent Scattering Data Treatment The measurement principle of neutron spin echo spectroscopy (quantum mechanical model) • The neutron wave function is split by magnetic fields • The 2 wave packets arrive at magnetic coil 1 magnetic coil 2 polarised sample the sample with a time neutron difference t • If the molecules move between the arrival of the first and second wave packet then coherence is lost • The intermediate scattering t λ3 Bdl function I(Q,t) reflects this ∝ loss in coherence strong wavelength field integral dependence Return The measurement principle of neutron spin echo spectroscopy Dynamic Scattering NSE spectra for diffusive motion Function S(Q,ω) G(R,ω) I(Q,t) = e-t/τ Fourier Transforms temperature up ⇒ τ down Intermediate VanHove
    [Show full text]
  • High Resolution Spectroscopy with the Neutron Resonance Spin Echo Method
    High Resolution Spectroscopy with the Neutron Resonance Spin Echo Method vorgelegt von Diplom-Physiker Felix Groitl aus Erlangen von der Fakultät II - Mathematik und Naturwissenschaften der Technischen Universität Berlin zur Erlangung des akademischen Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation Promotionsausschuss: Vorsitzender: Prof. Dr. M. Kneissl Gutachter: Prof. Dr. D. A. Tennant Gutachter: Prof. Dr. P. Böni Gutachter: Dr. K. Habicht Tag der wissenschaftlichen Aussprache: 18.12.2012 Berlin 2013 D 83 Abstract The first part of this thesis is dedicated to explore new territory for high resolution Neu- tron Resonance Spin Echo (NRSE) spectroscopy beyond measuring lifetimes of elementary excitations. The data analysis of such experiments requires a detailed model for the echo amplitude as a function of correlation time. The model also offers guidance for planning NRSE experiments in terms of a sensible choice of parameters and allows predicting quan- titatively the information content of NRSE spectroscopy for line shape analysis or energy level separation. Major generalizations of the existing formalism, developed in this thesis, allow for violated spin echo conditions, arbitrary local gradient components of the dispersion surface and detuned parameters of the background triple axis spectrometer (TAS) giving rise to important additional depolarizing effects, which have been neglected before. Fur- thermore, the formalism can now be applied to any crystal symmetry class. The model was successfully tested by experiments on phonons in a high quality single crystal of Pb and the results demonstrate the stringent necessity to consider second order depolarization effects. The formalism was subsequently extended to analyze mode doublets. As a major step for- ward, detuning effects for both modes are taken into account here.
    [Show full text]
  • LCLS: the First Experiments
    LCLS THE FIRST EXPERIMENTS September 2000 ii Table of Contents First Scientific Experiments for the LCLS .....................................................v Atomic Physics Experiments ..........................................................................1 Plasma and Warm Dense Matter Studies......................................................13 Structural Studies on Single Particles and Biomolecules .............................35 Femtochemistry.............................................................................................63 Studies of Nanoscale Dynamics in Condensed Matter Physics....................85 X-ray Laser Physics ....................................................................................101 Appendix 1: Committee Members..............................................................113 iii iv First Scientific Experiments for the LCLS The Scientific Advisory Committee (SAC) for the Linac Coherent Light Source (LCLS) has selected six scientific experiments for the early phase of the project. The LCLS, with proposed construction in the 2003-2006 time frame, has been designed to utilize the last third of the existing Stanford Linear Accelerator Center (SLAC) linac. The linac produces a high-current 5- 15 GeV electron beam that is bunched into 230 fs slices with a 120 Hz repetition rate. When traveling through a sufficiently long (of order of 100 m) undulator, the electron bunches will lead to self amplification of the emitted x-ray intensity constituting an x-ray free electron laser (XFEL). If funded as proposed, the LCLS will be the first XFEL in the world, operating in the 800-8,000 eV energy range. The emitted coherent x-rays will have unprecedented brightness with 1012-1013 photons/pulse in a 0.2-0.4% energy bandpass and an unprecedented time structure with a design pulse length of 230 fs. Studies are under way to reduce the pulse length to tens of femtoseconds. This document presents descriptions of the early scientific experiments selected by SAC in the spring of 2000.
    [Show full text]
  • Neutron Spin Echo Spectroscopy
    Neutron Spin Echo Spectroscopy Catherine Pappas TU Delft uncluding slides and animations from R. Gähler, R. Cywinski, W. Bouwman Berlin Neutron School - 30.3.09 from the source to the detector sample and source moderator PSΕ ΙΝ sample environment PSE OUT detector Neutron flux φ = Φ η dE dΩ / 4π source flux intensity field of neutron distribution losses instrumentation definition of the beam : Q, E and polarisation Berlin Neutron School - 30.3.09 Neutron Spin Echo why ? very high resolution how ? using the transverse components of beam polarization Larmor precession Berlin Neutron School - 30.3.09 Neutron Spin Echo I: polarized neutrons - Larmor precession II: NSE : Larmor precession III: NSE : semi-classical description IV: movies V: quantum mechanical approach VI: examples VII: NSE and structure Berlin Neutron School - 30.3.09 Neutron Spin Echo I: polarized neutrons - Larmor precession II: NSE : classical description III: NSE : quantum mechanical description IV: movies V: NSE and coherence VI: exemples VII: NSE and structure Berlin Neutron School - 30.3.09 Polarized Neutrons ๏ polarizer ๏ analyzer magnetic field (guide - precession) magnetic field Neutron Neutron source polarizer B P analyzer detector flipper sample Berlin Neutron School - 30.3.09 Longitudinal polarization analysis Why longitudinal ???? after F. Tasset because we apply a magnetic field and measure the Berlinprojection Neutron School of - 30.3.09 the polarization vector along this field Larmor Precession Motion of the polarization of a neutron beam in a magnetic field dµ = γ (µ
    [Show full text]
  • Laser Interferometer Space Antenna What Is LISA?
    Volume 11 number 4 2003 FALL Quarter A FLIGHT PROGRAMS AND PROJECTS DIRECTORATE QUARTERLY PUBLICATION A Newsletter Published for Code 400 Employees INSIDE Laser Interferometer Space Antenna THIS What is LISA? ISSUE: How did the Universe begin? Does time have a beginning and an end? Does What is LISA? Page 1 space have edges? These are the questions we've struggled to answer for cen- Solar Dynamic Observatory Page 1 turies. Science and technology have now reached the point where answers to these questions are finally within our grasp. The Laser Interferometer Space Message From The Director Of Page 2 Antenna (LISA) may supply some of these answers as the mission studies Peer Award Ceremony & Picnic Page 2 the mergers of supermassive black holes, tests Einstein's Theory of General Tintypes Page 3 Relativity, probes the early Universe, and searches for gravitational waves—— its primary objective. Feedback Page 3 As the first dedicated space-based gravitational wave observatory, LISA will Technology Corner Page 6 detect waves generated by binaries within our Galaxy (the Milky Way) and Quotes of the Quarter Page 7 by massive black holes in distant galaxies. LISA will use an advanced system of laser interferometry for directly detecting and measuring them. This OBPR Free-Flyer Page 10 Best of the Best Page 12 (LISA Continued on page 4) The English Language Page 13 Peer Awards Page 14 Living with a Star Program – NASA Honor Awards Page 16 Solar Dynamics Observatory TCP Social News Page 19 Developing an understanding of the Sun took on a renewed sense of ur- Cultural Tidbits Page 19 gency during late October/early November.
    [Show full text]
  • Neutron Spectroscopy Study of the Diffusivity of Hydrogen in Mos2
    PCCP View Article Online PAPER View Journal | View Issue Neutron spectroscopy study of the diffusivity of hydrogen in MoS2 Cite this: Phys. Chem. Chem. Phys., 2021, 23, 7961 Vitalii Kuznetsov, ab Wiebke Lohstroh,c Detlef Rogalla,d Hans-Werner Becker,d Thomas Strunskus,e Alexei Nefedov, f Eva Kovacevic,g Franziska Traegerb and Peter Fouquet *a The diffusion of hydrogen adsorbed inside layered MoS2 crystals has been studied by means of quasi- elastic neutron scattering, neutron spin-echo spectroscopy, nuclear reaction analysis, and X-ray Received 29th September 2020, photoelectron spectroscopy. The neutron time-of-flight and neutron spin-echo measurements Accepted 18th December 2020 demonstrate fast diffusion of hydrogen molecules parallel to the basal planes of the two dimensional DOI: 10.1039/d0cp05136e crystal planes. At room temperature and above, this intra-layer diffusion is of a similar speed to the surface diffusion that has been observed in earlier studies for hydrogen atoms on Pt surfaces. A significantly rsc.li/pccp slower hydrogen diffusion was observed perpendicular to the basal planes using nuclear reaction analysis. Creative Commons Attribution-NonCommercial 3.0 Unported Licence. 1 Introduction in order to replace the expensive platinum, which is widely used today. Diffusion of molecules on surfaces is crucial for a range of Molybdenum disulphide, MoS2, has shown promising beha- chemical processes, such as catalysis or sensing, but it remains viour as a catalyst in the hydrogen evolution reaction (HER),6–10 extremely difficult to observe experimentally on atomic length which is completely in line with its known activity for hydro- scales. This is particularly true for the case of light molecules genation reactions.
    [Show full text]
  • Guide to Biotechnology 2008
    guide to biotechnology 2008 research & development health bioethics innovate industrial & environmental food & agriculture biodefense Biotechnology Industry Organization 1201 Maryland Avenue, SW imagine Suite 900 Washington, DC 20024 intellectual property 202.962.9200 (phone) 202.488.6301 (fax) bio.org inform bio.org The Guide to Biotechnology is compiled by the Biotechnology Industry Organization (BIO) Editors Roxanna Guilford-Blake Debbie Strickland Contributors BIO Staff table of Contents Biotechnology: A Collection of Technologies 1 Regenerative Medicine ................................................. 36 What Is Biotechnology? .................................................. 1 Vaccines ....................................................................... 37 Cells and Biological Molecules ........................................ 1 Plant-Made Pharmaceuticals ........................................ 37 Therapeutic Development Overview .............................. 38 Biotechnology Industry Facts 2 Market Capitalization, 1994–2006 .................................. 3 Agricultural Production Applications 41 U.S. Biotech Industry Statistics: 1995–2006 ................... 3 Crop Biotechnology ...................................................... 41 U.S. Public Companies by Region, 2006 ........................ 4 Forest Biotechnology .................................................... 44 Total Financing, 1998–2007 (in billions of U.S. dollars) .... 4 Animal Biotechnology ................................................... 45 Biotech
    [Show full text]
  • Evolution of Multiscale Vortices in the Development of Hurricane Dolly (2008)
    JANUARY 2011 F A N G A N D Z H A N G 103 Evolution of Multiscale Vortices in the Development of Hurricane Dolly (2008) JUAN FANG Key Laboratory of Mesoscale Severe Weather (MOE), Department of Atmospheric Sciences, Nanjing University, Nanjing, China FUQING ZHANG Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania (Manuscript received 6 April 2010, in final form 6 July 2010) ABSTRACT As a follow-up to a previously published article on the initial development and genesis of Hurricane Dolly (2008), this study further examines the evolution of, and interactions among, multiscale vortices ranging from the system-scale main vortex (L . 150 km) to the intermediate-scale cloud clusters (50 km , L , 150 km) and individual vorticity-rich convective cells (L , 50 km). It is found that there are apparent self-similarities among these vortices at different scales, each of which may undergo several cycles of alternating accumulation and release of convective available potential energy. Enhanced surface fluxes below individual cyclonic vortices at each scale contribute to the sustainment and reinvigoration of moist convection that in turn contributes to the maintenance and upscale growth of these vortices. Spectral analysis of horizontal divergence and relative vorticity further suggests that the cloud-cluster-scale and system-scale vortices are predominantly balanced while the individual convective vortices are largely unbalanced. The vorticity and energy produced by these individual vorticity-rich convective cells first saturate at convective scales that are subsequently transferred to larger scales. The sum of the diabatic heating released from these convective cells may be regarded as a persistent forcing on the quasi-balanced system-scale vortex.
    [Show full text]
  • Development of Transgenic Livestock with Reduced Myostatin
    DEVELOPMENT OF TRANSGENIC LIVESTOCK WITH REDUCED MYOSTATIN EXPRESSION USING RNA INTERFERENCE A Dissertation by KIMBERLY JEAN TESSANNE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2009 Major Subject: Veterinary Physiology DEVELOPMENT OF TRANSGENIC LIVESTOCK WITH REDUCED MYOSTATIN EXPRESSION USING RNA INTERFERENCE A Dissertation by KIMBERLY JEAN TESSANNE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Mark Westhusin Committee Members, Charles Long Thomas Spencer Nancy Ing Head of Department, Glen Laine December 2009 Major Subject: Veterinary Physiology iii ABSTRACT Development of Transgenic Livestock with Reduced Myostatin Expression Using RNA Interference. (December 2009) Kimberly Jean Tessanne, B.S., The Ohio State University; M.S., University of Wisconsin-Madison Chair of Advisory Committee: Dr. Mark Westhusin RNA interference (RNAi) is a means of regulating gene expression by targeting mRNA in a sequence-specific manner for degradation or translational inhibition. Short hairpin RNAs (shRNAs) and short interfering RNAs (siRNAs) have been extensively employed for manipulating gene expression in a wide range of species. The goal for this research was to produce transgenic livestock in which myostatin, a negative regulator of muscle growth, has been targeted for silencing by RNAi. This would demonstrate the utility of RNAi for reducing gene expression in large animal species. To successfully target the myostatin gene for reduction, siRNAs were designed to target the both the bovine and caprine myostatin mRNA sequence.
    [Show full text]