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1

Surface trap for ytterbium ions  

E-print Network

We conducted an experiment to load a shallow planar ion trap from a cold atom source of Ytterbium using photoionization. The surface trap consisted of a three-rod radio frequency Paul trap fabricated using standard printed ...

Campbell, Jonathan A. (Jonathan Alan)

2006-01-01

2

Static Dipole Polarizability of Ytterbium  

NASA Astrophysics Data System (ADS)

The static dipole polarizability of the ground state ytterbium atom is calculated using full and approximate relativistic ab initio methods. Our recommended polarizability of 143 au is consistent with experimental atomic spectral data. The corresponding van der Waals coefficient C6 of Yb2, derived using Padé approximants, is 2062 (200) au.

Zhang, Peng; Dalgarno, A.

2007-10-01

3

Ytterbium triflate catalyzed synthesis of chlorinated lactones  

Microsoft Academic Search

The direct synthesis of chlorolactones from differently substituted alkenoic acids, using either sodium hypochlorite or chloramine T as the source of electrophilic chlorine and ytterbium triflate hydrate as the Lewis acid is described. In both cases the reactions proceeded in good yields affording selectively five- or six-membered chlorolactones.

Salvatore Genovese; Francesco Epifano; Caroline Pelucchini; Antonio Procopio; Massimo Curini

2010-01-01

4

Integrated ytterbium-Raman fiber amplifier.  

PubMed

An integrated ytterbium-Raman fiber amplifier architecture is proposed for power scaling of a Raman fiber laser. It is an ytterbium (Yb) fiber amplifier seeded with a double or multiple wavelength laser and followed by a passive Raman fiber. The bluest wavelength light gets amplified in the Yb fiber and the power is transferred to redder wavelengths in the following Raman fiber. A proof of principle experiment demonstrates a 300 W all-fiber linearly polarized single mode amplifier at 1120 nm with an optical efficiency of 70%, limited only by available pump power. The amplifier consists of 4 m of Yb-doped fiber and 20 m of germanium-doped fiber, and seeded with a laser emitting at 1070 and 1120 nm. The power evolution of the 1070 and 1120 nm light inside the amplifier is investigated, both numerically and experimentally. The possibility of power scaling to over kilowatt levels is discussed. PMID:24686642

Zhang, Lei; Jiang, Huawei; Cui, Shuzhen; Feng, Yan

2014-04-01

5

New data on activation cross section for deuteron induced reactions on ytterbium up to 50 MeV  

E-print Network

Activation cross sections of deuteron induced reactions on ytterbium for production of $^{177g,173,172,171,170,169,167}$Lu, $^{177,175,169}$Yb and $^{173,168,167,165}$Tm were extended up to 50 MeV deuteron energy. The new data are in acceptable agreement with the earlier experimental data in the overlapping energy region. The experimental data are compared with the predictions of the ALICE-D, EMPIRE-D and TALYS 1.4 (TENDL-2013 on-line library results) codes.

F. Tárkányi; F. Ditrói; S. Takács; A. Hermanne; A. V. Ignatyuk

2014-12-02

6

Ytterbium-based compounds as fast and dense inorganic scintillators  

Microsoft Academic Search

The recent observation of UV scintillation in mixed yttrium\\/ytterbium aluminium garnets opened the field of investigation to a new class of scintillating crystals. Their interesting luminescence properties make them very attractive not only for solar neutrino spectroscopy as ytterbium containing detector material, but also for radiation detection in general, as dense, fast and efficient scintillators. Studies of charge transfer luminescence

Rémi Chipaux; Michel Cribier; Christophe Dujardin; Nicolas Garnier; Natacha Guerassimova; Jacques Mallet; Jean-Pierre Meyer; Christian Pédrini; Ashot G. Petrosyan

2001-01-01

7

Compact, highly efficient ytterbium doped bismuthate glass waveguide laser.  

PubMed

Laser slope efficiencies close to the quantum defect limit and in excess of 78% have been obtained from an ultrafast laser inscribed buried channel waveguide fabricated in a ytterbium-doped bismuthate glass. The simultaneous achievement of low propagation losses and preservation of the fluorescence properties of ytterbium ions is the basis of the outstanding laser performance. PMID:22627539

Mary, R; Beecher, S J; Brown, G; Thomson, R R; Jaque, D; Ohara, S; Kar, A K

2012-05-15

8

Ytterbium Ion Qubits for Quantum Information Processing  

NASA Astrophysics Data System (ADS)

We present trapped ytterbium ions as quantum bits for quantum information processing. The viability of this atomic ion as a qubit is demonstrated through high-fidelity state initialization and detection of the first-order magnetic field-insensitive hyperfine ``clock'' states, with a measured coherence time of at least 2.5 seconds. The simple atomic structure, large fine and hyperfine splittings, and transition wavelengths that facilitate the use of optical fibers, may allow for the implementation of a variety of quantum information processing schemes. In addition, we present improved measurements of the ^2P1/2 excited state lifetime and branching ratio into ^2D3/2.

Olmschenk, Steven; Matsukevich, Dzmitry; Maunz, Peter; Moehring, David; Younge, Kelly; Monroe, Chris

2008-05-01

9

Ytterbium solid-state lasers. The first decade  

Microsoft Academic Search

The spectroscopic and laser kinetic properties of the trivalent ytterbium ion in various solid-state media are reviewed. Contrasts between four- and quasi-three-level lasers (e.g., Nd:YAG versus Yb:YAG) are highlighted. Various architectures suitable for use in high-brightness high-power Yb:YAG lasers are examined, and achieved laser performance levels are summarized. The properties of alternative ytterbium-doped laser gain media are reviewed, and early

William F. Krupke

2000-01-01

10

46 CFR 108.175 - Contiguous locations.  

Code of Federal Regulations, 2013 CFR

...108.175 Section 108.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous...

2013-10-01

11

40 CFR 161.175 - Certified limits.  

Code of Federal Regulations, 2010 CFR

...161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS ...REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements § 161.175 Certified...

2010-07-01

12

21 CFR 137.175 - Phosphated flour.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Phosphated flour. 137.175 Section 137.175 ...FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours and Related Products § 137.175...

2010-04-01

13

Quantum Simulation of Magnetism with Ytterbium Ions  

NASA Astrophysics Data System (ADS)

An array of cold trapped ions has recently been identified as a promising physical implementation of a quantum simulator [1,2], thanks to the tunable long range couplings between ions and its advanced status on quantum computation applications. In particular, ions coupled by tightly bound transverse normal modes allows more efficient cooling and wide tunability of the effective spin-spin couplings. We will report our most recent simulation results of quantum spin Hamiltonians with few trapped ytterbium ions, coupled by transverse modes. We will also discuss on how this may be scaled up to a much larger number of spins with anharmonic traps and using multiple transverse modes. This work is supported by the DARPA OLE Program under ARO contract, IARPA under ARO contract, the NSF PIF Program, and the NSF Physics Frontier Center at JQI. [1] D. Porras and J. I. Cirac, Phys. Rev. Lett. 92, 207901 (2004) [2] A. Friedenauer et al., Nat. Phys. 4, 757 (2008)

Chang, Ming-Shien; Kim, Kihwan; Korenblit, Simcha; Islam, Kazi; Monroe, Christopher

2009-05-01

14

Photoassociation of Laser-cooled Ytterbium Atoms  

NASA Astrophysics Data System (ADS)

We report photoassociation of laser-cooled ytterbium (Yb) atoms. By detecting the trap loss of 174Yb atoms in the FORT due to the photoassociation beam, we could observe more than 90 photoassociation resonances of vibrational levels in the {}1? u^ + state which connects asymptotically to the 1S0+1P1 atomic state in the dissociation limit. From the observed resonance frequencies we could precisely determine the atomic radiative lifetime of the 1P1 state to 5.464 ± 0.005 ns. We have also observed linebroadening of photoassociation resonances, which is ascribed to the predissociation to the triplet states, and determined the transition probability to be 0.2. Furthermore, we have observed the decrease of the intensity of photoassiciation signal at 435 GHz detuning from the 1S0+1P1 asymptote, from which the scattering length is estimated to be equal to or less than 3 nm.

Takahashi, Y.; Takasu, Y.; Komori, K.; Honda, K.; Kumakura, M.; Yabuzaki, T.

2003-04-01

15

SEARCH FOR NEW YTTERBIUM-BASED HEAVY FERMION COMPOUNDS D. Bollinger, E. Morosan1  

E-print Network

SEARCH FOR NEW YTTERBIUM-BASED HEAVY FERMION COMPOUNDS D. Bollinger, E on synthesizing Ytterbium-based heavy fermions that we believe will display these transitions compounds containing Ce have been found to be heavy fermions, one

Mellor-Crummey, John

16

Optimal Design of Double-Clad Ytterbium-Doped Fiber Amplifiers Operating at 1020-1070  

E-print Network

Optimal Design of Double-Clad Ytterbium-Doped Fiber Amplifiers Operating at 1020-1070 K. S. Tsang1 experimentally demonstrated a double- clad ytterbium-doped fiber amplifier operating at 1020 to 1070 nm. The measured gain is 27 dB and the gain variation is less than 2 dB. Keywords: fiber amplifier, ytterbium

Wai, Ping-kong Alexander

17

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2010 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2010-07-01

18

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2012 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2012-07-01

19

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2011 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2011-07-01

20

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2013 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2013-07-01

21

33 CFR 175.135 - Existing equipment.  

Code of Federal Regulations, 2014 CFR

...equipment. Launchers manufactured before 1 January, 1981, which do not have approval numbers are acceptable for use with meteor or parachute signals listed in Table 175.130 under § 175.130 as long as they remain in serviceable condition....

2014-07-01

22

Gain measurements at 5 nm in nickel-like ytterbium  

SciTech Connect

Soft x-ray gain has been demonstrated at 5.03 nm within a laser produced plasma of Ni-like ytterbium. Experiments will also be described with higher Z Ni-like ions which can produce even shorter wavelength x-ray laser transition. 3 refs.

MacGowan, B.J.; Bourgade, J.L.; Combis, P.; Keane, C.J.; Louis-Jacquet, M.; Matthews, D.L.; Naccache, D.; Stone, G.; Thiell, G.; Whelan, D.A.

1988-03-01

23

Discovery of dysprosium, holmium, erbium, thulium and ytterbium isotopes  

E-print Network

Currently, 31 dysprosium, 32 holmium, 32 erbium, 33 thulium and 31 ytterbium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

C. Fry; M. Thoennessen

2012-05-26

24

Discovery of dysprosium, holmium, erbium, thulium and ytterbium isotopes  

E-print Network

Currently, 31 dysprosium, 32 holmium, 32 erbium, 33 thulium and 31 ytterbium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

Fry, C

2012-01-01

25

Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes  

SciTech Connect

Currently, thirty-one dysprosium, thirty-two holmium, thirty-two erbium, thirty-three thulium, and thirty-one ytterbium isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

Fry, C.; Thoennessen, M., E-mail: thoennessen@nscl.msu.edu

2013-09-15

26

Toward IFE Oriented Laser Chains: Cryogenically Cooled Ytterbium Doped Materials  

Microsoft Academic Search

With the aim to set up Inertial Fusion Energy (IFE) driver, we develop the properties of the Ytterbium doped materials and the problems met when designing such a system: essentially thermal management and ASE gain depletion. We after present the experimental results obtained using sesquioxide Yb3+ doped ceramics at cryogenic temperature. We also propose a solution for minimizing the ASE

G. Bourdet; O. Casagrande; V. Cardinali; N. Deguil-Robin; B. Le Garrec

2009-01-01

27

2 CFR 175.15 - Award term.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Award term. 175.15 Section 175.15 Grants and...AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD TERM FOR TRAFFICKING IN PERSONS § 175.15 Award term. (a) To implement the trafficking...

2012-01-01

28

2 CFR 175.15 - Award term.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Award term. 175.15 Section 175.15 Grants and...FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.15 Award term. (a) To implement the trafficking...

2014-01-01

29

2 CFR 175.15 - Award term.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Award term. 175.15 Section 175.15 Grants and...GRANTS AND AGREEMENTS [Reserved] AWARD TERM FOR TRAFFICKING IN PERSONS § 175.15 Award term. (a) To implement the trafficking...

2011-01-01

30

2 CFR 175.15 - Award term.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Award term. 175.15 Section 175.15 Grants and...AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD TERM FOR TRAFFICKING IN PERSONS § 175.15 Award term. (a) To implement the trafficking...

2013-01-01

31

ROB. THALN. 2014 Spektralunderskningar rrande skandium, ytterbium, erbium och thulium (Recherches spectrales sur le scandium, l'ytterbium, l'erbium et le  

E-print Network

35 ROB. THAL�N. 2014 Spektralundersökningar rörande skandium, ytterbium, erbium och thulium (Recherches spectrales sur le scandium, l'ytterbium, l'erbium et le thulium ) ; Ofversigt af Kongl. Vetenskaps solutions de nitrates, l'une rose, riche en erbium, l'autre presclue incolore et riche en thulium. Plusieurs

Paris-Sud XI, Université de

32

Laser cooling and trapping of atomic ytterbium  

NASA Astrophysics Data System (ADS)

This dissertation reports an experimental study of laser cooled and magneto-optically trapped atomic Ytterbium (Yb). Studies focus on cooling Yb by driving the strong 398.9 nm (6s2)1 S0-(6s6p) 1P1 transition and probing the resulting cold samples by weakly exciting the spectrally narrow 555.8 nm (6 s2)1S0-(6 s6p)3P1 transition. Apparatus required for these experiments, including a 398.9 nm laser system, a 1S0- 1P1 atomic beam Zeeman slower, and a 1S0-1P 1 magneto-optical trap (MOT), are developed and described in detail. Overviews of the Yb internal level structure and theoretical principles underlying the employed laser cooling and trapping techniques are provided. Our studies begin with a new laser cooling based optical double-resonance technique for performing high-resolution measurements of isotope shifts and hyperfine splittings. This method is applied to the Yb 1 S0-1P1 transition, resulting in the most complete single- technique survey to date of the Yb 1S0-1 P1 isotope shifts and hyperfine splittings and the first spectral position measurement of the 173Yb 1 S0(F = 5/2)-1P 1(F = 7/2) transition. Cascade radiative decay from the 1P 1 excited- state to the (6s6p)3P 2,0 metastable states is predicted to fundamentally restrict 1S0-1P 1 Yb MOT storage times. Using power-dependent 174Yb trap loss, we verify this prediction and present the first measurement of the effective 1P1 --> 3P 2,0 radiative decay rate. Next we detail a new in situ technique for probing the static and dynamic properties of MOTs that utilizes probe-induced fluorescence from the 1S 0-3P1 transition and present measurements of trapping-beam- induced energy shifts of the 1S0 ground state. Finally, we demonstrate dual-isotope Yb MOTs of extreme experimental simplicity yet containing either Fermion- Boson or Boson-Boson isotope pairs, results that to date have not been obtained in any other single system. Along with providing an essential step toward future studies of quantum degenerate Yb mixtures, this experiment establishes a versatile pathway for studies of cross- isotope molecular formation in a system where the fundamental electronic structure of the interacting atoms can be directly manipulated. Lacking the requisite ground-state magnetic sub- structure, Yb and the alkaline earth atoms Magnesium (Mg), Calcium (Ca), and Strontium (Sr) cannot be held in the ground-state magnetic traps currently used for alkali-metal atoms. We theoretically analyze a solution to this problem that relies on magnetically trapping Yb, Mg, Ca, and Sr in the 3P 2(mJ = 2) metastable excited-state. Here, we demonstrate that 1S0- 1P1 MOT magnetic fields will confine Yb, Mg, Ca, and Sr 3P2(m J = 2) metastable state atoms that are pre-cooled only to the 1S0-1P 1 Doppler-limited temperature. Three potential loading schemes, one that utilizes the 1P1 --> 3P2,0 radiative decay channel studied earlier and is completely continuous, and a zero-background detection scheme are discussed. Preliminary experimental work necessary for magnetically trapping Yb, including the first measurement of the A((6s7s)3 S1-(6s6p)3P 1)/A((6s7s)3S1-(6s6p) 3P0) radiative branching ratio, is described.

Loftus, Thomas Howard

2001-12-01

33

Paramagnetic Faraday rotation with spin-polarized ytterbium atoms  

E-print Network

We report observation of the paramagnetic Faraday rotation of spin-polarized ytterbium (Yb) atoms. As the atomic samples, we used an atomic beam, released atoms from a magneto-optical trap (MOT), and trapped atoms in a far-off-resonant trap (FORT). Since Yb is diamagnetic and includes a spin-1/2 isotope, it is an ideal sample for the spin physics, such as quantum non-demolition measurement of spin (spin QND), for example. From the results of the rotation angle, we confirmed that the atoms were almost perfectly polarized.

M. Takeuchi; T. Takano; S. Ichihara; Y. Takasu; M. Kumakura; T. Yabuzaki; Y. Takahashi

2005-12-07

34

7 CFR 1726.175 - General plant materials.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2011-01-01

35

7 CFR 1726.175 - General plant materials.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2010-01-01

36

25 CFR 175.22 - Requirements for receiving electrical service.  

Code of Federal Regulations, 2013 CFR

... false Requirements for receiving electrical service. 175.22 Section 175...175.22 Requirements for receiving electrical service. In addition to the other...the customer, in order to receive electrical service, shall enter into a...

2013-04-01

37

25 CFR 175.22 - Requirements for receiving electrical service.  

Code of Federal Regulations, 2010 CFR

... false Requirements for receiving electrical service. 175.22 Section 175...175.22 Requirements for receiving electrical service. In addition to the other...the customer, in order to receive electrical service, shall enter into a...

2010-04-01

38

25 CFR 175.22 - Requirements for receiving electrical service.  

Code of Federal Regulations, 2011 CFR

... false Requirements for receiving electrical service. 175.22 Section 175...175.22 Requirements for receiving electrical service. In addition to the other...the customer, in order to receive electrical service, shall enter into a...

2011-04-01

39

25 CFR 175.22 - Requirements for receiving electrical service.  

Code of Federal Regulations, 2012 CFR

... true Requirements for receiving electrical service. 175.22 Section 175...175.22 Requirements for receiving electrical service. In addition to the other...the customer, in order to receive electrical service, shall enter into a...

2012-04-01

40

25 CFR 175.22 - Requirements for receiving electrical service.  

Code of Federal Regulations, 2014 CFR

... false Requirements for receiving electrical service. 175.22 Section 175...175.22 Requirements for receiving electrical service. In addition to the other...the customer, in order to receive electrical service, shall enter into a...

2014-04-01

41

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 false Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2014-04-01

42

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2011-04-01

43

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2012 CFR

...2011-04-01 true Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2012-04-01

44

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2013-04-01

45

25 CFR 175.10 - Revenues collected from power operations.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Revenues collected from power operations. 175.10 Section 175.10 ...THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues...

2010-04-01

46

7 CFR 1726.175 - General plant materials.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false General plant materials. 1726.175 Section 1726.175 ...SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant materials. This section covers items...

2014-01-01

47

14 CFR 29.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2014 CFR

...false Demonstration of static longitudinal stability. 29.175 Section 29.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2014-01-01

48

14 CFR 27.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2013 CFR

...false Demonstration of static longitudinal stability. 27.175 Section 27.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2013-01-01

49

14 CFR 27.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2012 CFR

...false Demonstration of static longitudinal stability. 27.175 Section 27.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2012-01-01

50

14 CFR 23.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2012 CFR

... Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics...COMMUTER CATEGORY AIRPLANES Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability...

2012-01-01

51

14 CFR 25.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2013 CFR

... Demonstration of static longitudinal stability. 25.175 Section 25.175 Aeronautics...TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.175 Demonstration of static longitudinal stability. Static longitudinal stability...

2013-01-01

52

14 CFR 23.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2014 CFR

... Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics...COMMUTER CATEGORY AIRPLANES Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability...

2014-01-01

53

14 CFR 27.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2014 CFR

...false Demonstration of static longitudinal stability. 27.175 Section 27.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2014-01-01

54

14 CFR 29.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2013 CFR

...false Demonstration of static longitudinal stability. 29.175 Section 29.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2013-01-01

55

14 CFR 23.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2013 CFR

... Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics...COMMUTER CATEGORY AIRPLANES Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability...

2013-01-01

56

14 CFR 23.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2011 CFR

... Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics...COMMUTER CATEGORY AIRPLANES Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability...

2011-01-01

57

14 CFR 29.175 - Demonstration of static longitudinal stability.  

Code of Federal Regulations, 2012 CFR

...false Demonstration of static longitudinal stability. 29.175 Section 29.175 Aeronautics...175 Demonstration of static longitudinal stability. (a) Climb. Static longitudinal stability must be shown in the climb condition at...

2012-01-01

58

43 CFR 17.5 - Compliance information.  

Code of Federal Regulations, 2010 CFR

...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The...

2010-10-01

59

43 CFR 17.5 - Compliance information.  

Code of Federal Regulations, 2011 CFR

...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The...

2011-10-01

60

43 CFR 17.5 - Compliance information.  

Code of Federal Regulations, 2014 CFR

...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The...

2014-10-01

61

43 CFR 17.5 - Compliance information.  

Code of Federal Regulations, 2013 CFR

...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The...

2013-10-01

62

43 CFR 17.5 - Compliance information.  

Code of Federal Regulations, 2012 CFR

...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The...

2012-10-01

63

40 CFR 61.175 - Monitoring requirements.  

Code of Federal Regulations, 2010 CFR

...PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS National Emission Standard for Inorganic Arsenic Emissions From Primary Copper Smelters § 61.175 Monitoring requirements. (a) Each owner or operator of a...

2010-07-01

64

33 CFR 175.115 - Exceptions.  

Code of Federal Regulations, 2011 CFR

...BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.115 Exceptions...110; however, each must carry on board visual distress signals suitable for night use...similar event; (b) A person using a manually propelled boat; or (c) A...

2011-07-01

65

33 CFR 175.115 - Exceptions.  

Code of Federal Regulations, 2010 CFR

...BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.115 Exceptions...110; however, each must carry on board visual distress signals suitable for night use...similar event; (b) A person using a manually propelled boat; or (c) A...

2010-07-01

66

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2013 CFR

...LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart...the following routes, including intermediate ports, on Lake Michigan, between Calumet Harbor, IL, and— (a) Milwaukee,...

2013-10-01

67

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2010 CFR

...LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes on Lake Michigan, between Chicago (Calumet Harbor), IL, and— (a)...

2010-10-01

68

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2012 CFR

...LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart...the following routes, including intermediate ports, on Lake Michigan, between Calumet Harbor, IL, and— (a) Milwaukee,...

2012-10-01

69

46 CFR 45.175 - Applicable routes.  

Code of Federal Regulations, 2011 CFR

...LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart...the following routes, including intermediate ports, on Lake Michigan, between Calumet Harbor, IL, and— (a) Milwaukee,...

2011-10-01

70

21 CFR 175.250 - Paraffin (synthetic).  

Code of Federal Regulations, 2013 CFR

...HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components...applicable to synthetic paraffin used in food-packaging adhesives complying with § 175.105. [42 FR 14534, Mar....

2013-04-01

71

21 CFR 175.250 - Paraffin (synthetic).  

Code of Federal Regulations, 2012 CFR

...HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components...applicable to synthetic paraffin used in food-packaging adhesives complying with § 175.105. [42 FR 14534, Mar....

2012-04-01

72

21 CFR 175.250 - Paraffin (synthetic).  

Code of Federal Regulations, 2014 CFR

...AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components...applicable to synthetic paraffin used in food-packaging adhesives complying with § 175.105. [42 FR 14534, Mar....

2014-04-01

73

Synthesis of ytterbium bisphthalocyanines: Photophysicochemical properties and nonlinear absorption behavior  

NASA Astrophysics Data System (ADS)

Herein we report on the syntheses, photophysico-chemical properties and nonlinear absorption parameters of bis-{1(4), 8(11), 15(18), 22(25)-(tetrapyridin-2-yloxy phthalocyaninato)} ytterbium (III) (3) and bis-{1(4), 8(11), 15(18), 22(25)-(tetrapyridin-4-yloxy phthalocyaninato)} ytterbium (III) (4). The fluorescence and singlet oxygen quantum yields obtained for complexes 3 and 4 are low. The triplet quantum yield obtained for complex 3 is high at ?T = 0.89 whereas for complex 4?T = 0.48. The third order optical susceptibility values are of the order: 10-11 esu (for complex 3), and 10-13 esu (for complex 4) while the hyperpolarizability values are of the order: 10-28 esu (for complex 3) and 10-31 esu (for complex 4). Complexes 3 and 4 show two-photon absorption coefficients of the order of 10-46 cm4 s/photon and 10-48 cm4 s/photon, and threshold intensities as low as 0.3 J cm-2 and 0.0045 J cm-2, respectively.

Sekhosana, Kutloano E.; Nyokong, Tebello

2014-11-01

74

Quantum degenerate mixture of ytterbium and lithium atoms  

SciTech Connect

We have produced a quantum degenerate mixture of fermionic alkali-metal {sup 6}Li and bosonic spin-singlet {sup 174}Yb gases. This was achieved using sympathetic cooling of lithium atoms by evaporatively cooled ytterbium atoms in a far-off-resonant optical dipole trap. We observe the coexistence of Bose-condensed (T/T{sub c}{approx_equal}0.8) {sup 174}Yb with 2.3x10{sup 4} atoms and Fermi degenerate (T/T{sub F}{approx_equal}0.3) {sup 6}Li with 1.2x10{sup 4} atoms. Quasipure Bose-Einstein condensates of up to 3x10{sup 4} {sup 174}Yb atoms can be produced in single-species experiments. Our results mark a significant step toward studies of few- and many-body physics with mixtures of alkali-metal and alkaline-earth-metal-like atoms, and for the production of paramagnetic polar molecules in the quantum regime. Our methods also establish a convenient scheme for producing quantum degenerate ytterbium atoms in a 1064 nm optical dipole trap.

Hansen, Anders H.; Khramov, Alexander; Dowd, William H.; Jamison, Alan O.; Ivanov, Vladyslav V.; Gupta, Subhadeep [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)

2011-07-15

75

Processing and properties of ytterbium-erbium silicate thin film gain media  

E-print Network

The structural and photoluminescence properties of ytterbium-erbium silicate thin films have been investigated. The films were fabricated by RF-magnetron co-sputtering of Er[subscript 2]O[subscript 3], Yb[subscript ...

Kimerling, Lionel C.

76

Passively Q-switched Ytterbium and Chromium all-fibre laser  

E-print Network

A chromium-doped saturable absorber fibre stabilizes an otherwise spontaneously chaotic ytterbium- doped fibre laser. This original passively Q-switched all-fibre laser produces sustained and stable trains of smooth pulses at high repetition rate.

Dussardier, Bernard; Peterka, Pavel

2012-01-01

77

Laser verre codop Erbium et Ytterbium pomp par une diode laser de puissance  

E-print Network

Laser verre codopé Erbium et Ytterbium pompé par une diode laser de puissance Eric Tanguy CL lean proposé est fondé sur l'utilisation d'un verre codopé erbium et ytterbium pompé optiquement par unediode laser fibrée de puissanceet émettantvers 980 nm. Les lasers exploitant les propriétés de l'erbium et

Paris-Sud XI, Université de

78

CARACTRISATION DU PHOTO-NOIRCISSEMENT DES FIBRES OPTIQUES DOPES YTTERBIUM PAR THERMOLUMINESCENCE  

E-print Network

CARACT�RISATION DU PHOTO-NOIRCISSEMENT DES FIBRES OPTIQUES DOP�ES YTTERBIUM PAR THERMOLUMINESCENCE thermoluminescence, une technique particulièrement adaptée à la caractérisation des défauts et centres ionisés par-noircissement ; Thermoluminescence 1. INTRODUCTION Les fibres optiques en silice dopées ytterbium (FDY) utilisées dans les

Boyer, Edmond

79

Reactivity of ytterbium(II) silylamide supported by a pyrrolyl-cyclopentadienyl ligand.  

PubMed

Reactivity of a divalent ytterbium amide LYbN(SiMe3)2 (1, L = Me4C5-SiMe2-NC4H4) supported by a pyrrolyl functionalized cyclopentadienyl ligand has been investigated. Reactions of 1 with the element sulfur led to the oxidation of the ytterbium to yield the disulfide-bridged ytterbium complex [LYbN(SiMe3)2]2(?-?(2):?(2)-S2) (2) while that with AgBPh4 resulted in the oxidation of the amide ligand to yield the divalent ytterbium complex LYb(BPh4) (3) along with the formation of silver and the N-N coupling product [N(SiMe3)2]2. Reactions of 1 with phenol, phenylacetylene and aniline led to the formation of the corresponding ytterbium aryloxide [LYb(?-OAr(1))]2 (4, Ar(1) = 2,6-tBu2-4-MeC6H2), ytterbium alkynyl complex [LYb(?-C?CAr(2))]2 (5, Ar(2) = 4-tBuC6H4) and ytterbium amide [(Me4C5-SiMe2-NHAr(3))Yb(?-NHAr(3))]2 (6, Ar(3) = 2,6-iPr2C6H3), respectively. The structural analysis of the reaction products revealed that the silyl bridged pyrrolyl arm is not coordinated to the ytterbium center in compounds 2, 4 and 5. The formation of 6 involved the cleavage of the Si-Npyrrole bond, the same bond cleavage was also observed in the reaction of 1 with red phosphorus, leading to the pyrrolide bridged complex [LYb(?-?(1):?(5)-NC4H4)]2 (7). PMID:25407233

Li, Jianfeng; Hao, Jingjun; Cui, Chunming

2015-01-14

80

The anomalous ferrimagnetic resonance properties of ytterbium-doped yttrium iron garnet  

Microsoft Academic Search

In single-crystal specimens of yttrium iron garnet doped with small amounts of ytterbium the ferrimagnetic resonance linewidths and the fields for resonance show anomalous behaviour in certain crystallographic directions at low temperatures. This paper presents some observations of this anomalous behaviour at 16·8 and 9·3 Gc\\/s as functions of temperature (1·5-25°K), concentration of ytterbium ions (1·, 5·1 and 10·2%) and

B H Clarke

1967-01-01

81

Measurements of optical refrigeration in ytterbium-doped crystals  

NASA Astrophysics Data System (ADS)

We measured anti-Stokes fluorescence cooling (optical refrigeration) in ytterbium-doped yttrium aluminum garnet (YAG). Pumping the 2.3% Yb3+:YAG crystal with 1.8 W of 1030 nm laser light produced a temperature drop of 8.9 °C from room temperature. The high thermal conductivity and ruggedness of this crystal make it an attractive material for use in optical refrigerators. Our spectral studies show that pure crystals of this material could be efficient for optical refrigeration at temperatures above ˜100 K. Photothermal deflection measurements show that our current crystals can cool at ˜250 K. Additionally, we measured optical refrigeration in a 5% Yb3+:Y2SiO5 crystal when pumped at 1050 nm.

Epstein, R. I.; Brown, J. J.; Edwards, B. C.; Gibbs, A.

2001-11-01

82

Marine Biology 111, 175-181 (1991)  

E-print Network

Marine Biology 111, 175-181 (1991) Marine ::~~ Biology© Springer-Verlag 1991 Uptake of dissolved organics by marine bacteria as a function of fluid motion B. E. Logan 1 and D. L. Kirchman 2 1, USA 2 College of Marine Studies, University of Delaware, Lewes, Deleware 19958, USA Date of final

83

Luminescence of ytterbium(III) in mixed-ligand compounds with cinnamic acid and neutral phosphorus-containing ligands  

NASA Astrophysics Data System (ADS)

The luminescence spectral characteristics of mixed-ligand compounds of ytterbium(III) with cinnamic acid and neutral phosphorus-containing ligands were studied by luminescence spectroscopy. The intensity of luminescence of the compounds was determined. The highest intensity of luminescence was found for the ytterbium(III) compound with triphenylphosphine oxide.

Kalinovskaya, I. V.

2014-09-01

84

JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 17, NO. 9, SEPTEMBER 1999 1593 Ytterbium-Doped Glass Waveguide Laser  

E-print Network

. Winick, Senior Member, IEEE, Member, OSA Abstract--A ytterbium-doped, glass, channel waveguide laser--Integrated optics, ion exchange, waveguide laser, ytterbium laser. I. INTRODUCTION Yb3 ions in glass and crystals [5]. In addition Yb3 has been widely used as a sensitizer for Er3 -doped glass amplifiers and lasers

Winick, Kim

85

30 CFR 62.175 - Notification of results; reporting requirements.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Notification of results; reporting requirements. 62.175...EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The...within 10 working days of receiving the results of an audiogram, or receiving the...

2010-07-01

86

30 CFR 62.175 - Notification of results; reporting requirements.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Notification of results; reporting requirements. 62.175...EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The...within 10 working days of receiving the results of an audiogram, or receiving the...

2011-07-01

87

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2012 CFR

...17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information shall be made clear,...

2012-10-01

88

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2013 CFR

...17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information shall be made clear,...

2013-10-01

89

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2011 CFR

...17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information shall be made clear,...

2011-10-01

90

40 CFR 180.175 - Maleic hydrazide; tolerances for residues.  

Code of Federal Regulations, 2012 CFR

... Maleic hydrazide; tolerances for residues. 180.175 Section 180.175...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD Specific Tolerances §...

2012-07-01

91

40 CFR 180.175 - Maleic hydrazide; tolerances for residues.  

Code of Federal Regulations, 2013 CFR

... Maleic hydrazide; tolerances for residues. 180.175 Section 180.175...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD Specific Tolerances §...

2013-07-01

92

40 CFR 180.175 - Maleic hydrazide; tolerances for residues.  

Code of Federal Regulations, 2011 CFR

... Maleic hydrazide; tolerances for residues. 180.175 Section 180.175...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD Specific Tolerances §...

2011-07-01

93

49 CFR 175.9 - Special aircraft operations.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Special aircraft operations. 175.9 Section...PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT...MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.9 Special aircraft operations. (a)...

2013-10-01

94

49 CFR 175.9 - Special aircraft operations.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false Special aircraft operations. 175.9 Section...PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT...MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.9 Special aircraft operations. (a)...

2014-10-01

95

49 CFR 175.9 - Special aircraft operations.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Special aircraft operations. 175.9 Section...PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT...MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.9 Special aircraft operations. (a)...

2012-10-01

96

49 CFR 175.9 - Special aircraft operations.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Special aircraft operations. 175.9 Section...PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT...MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.9 Special aircraft operations. (a)...

2011-10-01

97

18 CFR 367.1750 - Account 175, Derivative instrument assets.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Account 175, Derivative instrument assets. 367.1750...Assets § 367.1750 Account 175, Derivative instrument assets. This account must include the amounts paid for derivative instruments, and the change...

2010-04-01

98

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Airborne weather radar equipment requirements. 135.175 ...Equipment § 135.175 Airborne weather radar equipment requirements. (a) No...operations unless approved airborne weather radar equipment is installed in the...

2011-01-01

99

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Airborne weather radar equipment requirements. 135.175 ...Equipment § 135.175 Airborne weather radar equipment requirements. (a) No...operations unless approved airborne weather radar equipment is installed in the...

2013-01-01

100

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Airborne weather radar equipment requirements. 135.175 ...Equipment § 135.175 Airborne weather radar equipment requirements. (a) No...operations unless approved airborne weather radar equipment is installed in the...

2010-01-01

101

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 false Airborne weather radar equipment requirements. 135.175 ...Equipment § 135.175 Airborne weather radar equipment requirements. (a) No...operations unless approved airborne weather radar equipment is installed in the...

2014-01-01

102

14 CFR 135.175 - Airborne weather radar equipment requirements.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Airborne weather radar equipment requirements. 135.175 ...Equipment § 135.175 Airborne weather radar equipment requirements. (a) No...operations unless approved airborne weather radar equipment is installed in the...

2012-01-01

103

46 CFR 170.175 - Stability test: General.  

Code of Federal Regulations, 2012 CFR

...Shipping 7 2012-10-01 2012-10-01 false Stability test: General. 170.175 Section 170.175...HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS...

2012-10-01

104

46 CFR 170.175 - Stability test: General.  

Code of Federal Regulations, 2013 CFR

...Shipping 7 2013-10-01 2013-10-01 false Stability test: General. 170.175 Section 170.175...HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS...

2013-10-01

105

46 CFR 170.175 - Stability test: General.  

Code of Federal Regulations, 2014 CFR

...Shipping 7 2014-10-01 2014-10-01 false Stability test: General. 170.175 Section 170.175...HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS...

2014-10-01

106

40 CFR 180.175 - Maleic hydrazide; tolerances for residues.  

Code of Federal Regulations, 2010 CFR

... Maleic hydrazide; tolerances for residues. 180.175 Section 180.175...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD Specific Tolerances §...

2010-07-01

107

45 CFR 17.5 - Context to be reflected.  

Code of Federal Regulations, 2014 CFR

...17.5 Public Welfare Department of Health and Human Services GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information shall be made clear,...

2014-10-01

108

Contamination of YBCO bulk superconductors by samarium and ytterbium  

NASA Astrophysics Data System (ADS)

Y-Ba-Cu-O (YBCO, Y-123) single-grain bulk superconductors with a nominal composition Y1.5Ba2Cu3Ox and 1 wt% CeO2 addition were prepared by the optimized Top-Seeded Melt-Growth process. Small single-crystalline pieces cut from the SmBa2Cu3Oy (Sm-123) bulk were used for seeding of epitaxial growth. Wavelength-dispersive spectrometry (WDS) confirmed that prepared samples contain besides samarium from the seed also ytterbium from the substrate. The influence of maximum melting temperature, Tmax and dwell time on the contamination of the bulk samples was studied. Y2BaCuO5 (Y-211) barriers against samarium diffusion from the seed to melted sample were tested. Using a NdBa2Cu3Oz (Nd-123) seed and a combination of Y2O3 and Yb2O3 substrate led to a high critical temperature (Tc(50%) = 91.54 K) of prepared sample.

Volochova, D.; Jurek, K.; Radusovska, M.; Piovarci, S.; Antal, V.; Kovac, J.; Jirsa, M.; Diko, P.

2014-01-01

109

Quantum Frequency Conversion for Ytterbium Ion Based Quantum Repeaters  

NASA Astrophysics Data System (ADS)

Quantum key distribution systems represent a proven method to obtain fundamentally secure communication channels. However, the loss of entangled photons which create the encryption key limit the distance over which the systems are useful. Quantum repeaters have been used to increase the distance over which entangled photons can be transmitted. The most successful quantum repeaters entangle information between trapped ions and single photons and through the use of entanglement swapping protocols, relay the encryption keys over large distances. A requirement of these quantum repeaters is the ability to work in the telecom wavelengths (1310 nm or 1550 nm), where standard silica fibers exhibit low loss. With the majority of ions emitting in the ultraviolet and visible spectrum, and ytterbium in particular emitting at 369.5 nm, a conversion process is then needed that can translate the photons from 369.5 nm to the telecom band while preserving the entangled state. The experiment presented here details the first stage of a nonlinear frequency conversion setup that uses strong pump light to enable the conversion of 369.5 nm photons to 708 nm. The efficiency of the conversion process is analyzed to determine the optimum system parameters, with an initial single pass conversion efficiency of 0.20% achieved. Noise introduced during the nonlinear conversion process is examined to determine the effect it presents on the communication channel.

Clark, Ryan A.

110

Simulating Quantum Spin Models with Trapped Ytterbium Ions^1  

NASA Astrophysics Data System (ADS)

Simulating large quantum many-body systems is practically impossible with classical computers, as it requires resources exponential in the system size. An array of cold trapped ions has recently been identified as a promising candidate for exploring many-body spin Hamiltonians. This is due to superb control of their quantum states and interactions, high-fidelity spin state detection of each and every ion, and very long coherence time. We will initially work with less than 10 ions, but will speculate on how this may be scaled up to larger numbers of spins. We will report the recent progress toward quantum simulations of Heisenberg-like spin Hamiltonians [1] with trapped Ytterbium ions in a linear Paul trap. [1] D. Porras and J. I. Cirac, Phys. Rev. Lett. 92, 207901 (2004) ^1This work is supported by the DARPA OLE Program under ARO Award W911NF-07-1-0576, IARPA under ARO contract W911NF-04-1-0234, and the NSF PIF Program under grant PHY-0601255.

Chang, M.-S.; Kim, K.; Korenblit, S.; Islam, K. R.; Sterk, J. D.; Chew, A.; Slusher, R.; Monroe, C.

2008-05-01

111

Ultracold Mixtures and Molecules from Ytterbium and Lithium  

NASA Astrophysics Data System (ADS)

Ultracold mixtures composed of different atomic species offer unique opportunities for probing few and many-body physics, including studies of mass-mismatched Efimov physics, impurity probes of superfluid properties, and mass-imbalanced interactions. Furthermore, the possibility of producing heteronuclear, polar molecules through field-induced scattering resonances enables a large set of experiments involving dipolar quantum matter and tests of fundamental physics. We outline our experimental setup and techniques to synthesize molecules from ultracold gases of atomic lithium and ytterbium. We report on the production of a stable mixture of ^6Li and ^174Yb confined in a common far-off-resonant optical trap. Through studies of inter-species thermalization rates, we have extracted the s-wave scattering length |a^6Li-^174Yb|. Furthermore, through forced evaporation of ^174Yb, we have sympathetically cooled ^6Li to below the Fermi temperature. We will discuss experimental progress towards searches for inter-species Feshbach resonances, the synthesis of polar molecules, and studies of the BEC-BCS crossover in ^6Li using ^174Yb as an impurity probe.

Hansen, Anders; Khramov, Alexander; Dowd, William; Jamison, Alan; Ivanov, Vladyslav; Münchow, Frank; Gupta, Subhadeep

2011-06-01

112

Role of oxygen hole centres in the photodarkening of ytterbium-doped phosphosilicate fibre  

NASA Astrophysics Data System (ADS)

We have studied the photodarkening in active fibres with an ytterbium-doped phosphosilicate glass core under IR irradiation with a pump source (920 nm) and UV irradiation (193 nm). Analysis of absorption and luminescence spectra suggests that such irradiations produce phosphorus - oxygen - hole centres (P-OHCs) in the core glass network and lead to the reduction of the ytterbium ions to a divalent state (Yb2+). The photoinduced optical loss in the fibres in the visible range (400 - 700 nm) is mainly due to absorption by the P-OHCs. A quantum-mechanical model is proposed for P-OHC and Yb2+ formation.

Rybaltovsky, A. A.; Umnikov, A. A.; Bobkov, K. K.; Lipatov, D. S.; Romanov, A. N.; Likhachev, M. E.; Sulimov, V. B.; Gur'yanov, A. N.; Bubnov, M. M.; Dianov, E. M.

2013-11-01

113

Analysis of inhomogeneous-excitation frequency shifts of ytterbium optical lattice clocks  

NASA Astrophysics Data System (ADS)

We have investigated the frequency shifts caused by inhomogeneous excitation in a 171Yb optical lattice clock. The dependences of the inhomogeneity on the temperature of the cold ytterbium atoms and the misaligning angle between the lattice laser and the clock laser are analyzed by numerical calculations. The dependence of the fractional collisional frequency shift on the ground state fraction under different cold atom temperatures, atom numbers, lattice trap depths and unequal transverse and longitudinal temperatures are also shown. The results show that the uncertainty of the ytterbium clocks, contributed by the inhomogeneous excitation, can be reduced to be 10?19 or even lower with certain conditions.

Chen, Ning; Xu, Xinye

2015-01-01

114

High-power output of ytterbium-doped oxyorthosilicate lasers at 1018 nm  

NASA Astrophysics Data System (ADS)

A high-power laser system at 1018 nm was realized with an ytterbium-doped oxyorthosilicate solid-state master oscillator and ytterbium-doped double-clad fiber amplifier. In the Yb:LSO (Yb:Lu2SiO5) and Yb:LYSO (Yb:LuYSiO5) master laser oscillator, we attained the broadest tunable wavelength range from 994.50 to 1094.22 nm. In the power amplifier, we achieved an output power up to 4.14 W at 1018 nm by amplifying the Yb:LSO laser under a pump power of 15.8 W.

Lin, Niannian; Li, Wenxue; Zhou, Yuan; Shi, Yi; Yan, Ming; Yang, Kangwen; Zhao, Jian; Yang, Xianghui; Zeng, Heping

2013-01-01

115

Thermo-optical parameters measured in ytterbium-doped potassium gadolinium tungstate  

NASA Astrophysics Data System (ADS)

Oriented absorption and fluorescence spectra, refractive indices, thermal expansion, and thermal conductivities are reported for the anisotropic laser material ytterbium-doped potassium gadolinium tungstate, Yb3+:KGd(WO4)2. Measurements of negative values for dn/dT lead to the report of several useful athermal orientations for laser propagation.

Biswal, Subrat; O'Connor, Shawn P.; Bowman, Steven R.

2005-05-01

116

Chemisorption of ammonia molecules on ytterbium nanofilms deposited on silicon Si(111) at room temperature  

NASA Astrophysics Data System (ADS)

The interaction of ammonia molecules with the surface of ytterbium nanofilms of uniform thickness grown on a Si(111) 7 × 7 substrate and forming a chemically sharp interface with it has been investigated. It has been found that this interaction depends significantly on the thickness of nanofilms. For a film thickness equal to 5 monoatomic layers, chemisorption of ammonia has an essentially nondissociative character and the molecules form a donor-acceptor bond with ytterbium; as a result, the metal transforms from the divalent state into a new nonautonomous trivalent state. For other film thicknesses, the adsorbed molecules dissociate, nitrogen atoms diffuse into the bulk of the film and enter into the reaction with silicon, and ytterbium remains in the initial divalent state. It has been shown that the character of the interaction of ammonia molecules with ytterbium nanofilms and the stability of the NH3-Yb-Si(111) structures are determined by the standing waves of electron density (Friedel oscillations) generated by the interface between the metal and silicon substrate.

Kuz'min, M. V.; Mittsev, M. A.

2014-12-01

117

Second harmonic generation of spectrally broadened femtosecond ytterbium laser radiation in a gas-filled capillary  

SciTech Connect

A 300-fs radiation pulse of an ytterbium laser with a wavelength of 1030 nm and energy of 150 {mu}J were converted to a 15-fs pulse with a wavelength of 515 nm by broadening the emission spectrum in a capillary filled with xenon and by generating the second harmonic in a KDP crystal. The energy efficiency of the conversion was 30 %.

Didenko, N V; Konyashchenko, Aleksandr V; Kostryukov, P V; Losev, Leonid L; Tenyakov, S Yu

2011-09-30

118

Direct demonstration of sensitization at 980nm optical excitation in erbium-ytterbium silicates  

E-print Network

Sensitization of erbium by ytterbium in Er[subscript x]Yb[subscript 2-x]SiO[subscript 5] thin films at 980nm optical excitation is demonstrated by means of comparison of the 1.54?m photoluminescence intensities excited ...

Vanhoutte, Michiel

119

Wavefront control of a multicore ytterbium-doped pulse fiber amplifier by digital holography  

E-print Network

Wavefront control of a multicore ytterbium-doped pulse fiber amplifier by digital holography at the output of the fiber. Wavefront control by digital holography [3] has been recently demonstrated demonstrate the wavefront con- trol of a 19-core Yb-doped MCF amplifier using a digi- tal holography technique

Boyer, Edmond

120

Passively Q-Switched Ytterbium-and Chromium-doped All-Fiber Laser  

E-print Network

Passively Q-Switched Ytterbium- and Chromium-doped All-Fiber Laser Bernard Dussardier,1,* Jérôme, v.v.i., 182 51 Prague, Czech Republic * Corresponding author: bernard.dussardier@unice.fr A chromium time proposed a core-pumped, low power, all-fiber PQS laser [5] using a newly developed chromium

Paris-Sud XI, Université de

121

SOLITONS AND OPTICAL FIBERS: Self-Q-switched ytterbium-doped cladding-pumped fibre laser  

NASA Astrophysics Data System (ADS)

A self-Q-switched ytterbium-doped double-clad fibre laser is described. A samarium-doped fibre is used as a filter for protecting a pump source. A fibre coupler is employed to obtain a nonlinear feedback. The mechanism of pulse formation in the laser is considered, and the dependence of its output pulse on the coupler parameters is studied.

Grukh, Dmitrii A.; Kurkov, Andrei S.; Razdobreev, I. M.; Fotiadi, A. A.

2002-11-01

122

Low-Temperature Anomaly in Ferrimagnetic Resonance of Ytterbium-Doped Yttrium Iron Garnet  

Microsoft Academic Search

The field for ferrimagnetic resonance at helium temperatures of YIG in which small amounts of ytterbium have been substituted for yttrium is known to show sharp excursions as a function of applied field direction. These are inconsistent with the accepted energy-level scheme of Yb3+ ions in such a system. It is shown here on the basis of extended resonance studies

J. F. Dillon; J. P. Remeika; L. R. Walker

1967-01-01

123

Residual stresses and phase transformations in Ytterbium silicate environmental barrier coatings  

NASA Astrophysics Data System (ADS)

Due to their high melting temperature, low density, and good thermomechanical stability, silicon-based ceramics (SiC, Si3N4) are some of the most promising materials systems for high temperature structural applications in gas turbine engines. However, their silica surface layer reacts with water vapor contained in combustion environments. The resulting hydroxide layer volatilizes, leading to component recession. Environmental barrier coatings (EBCs) have been developed to shield the substrate from degradation. Next generation coatings for silicon-based ceramics based on ytterbium silicates have shown a promising combination of very low and good thermomechanical properties. The focus of this thesis is threefold: In the first part, phase transformations in plasma sprayed ytterbium silicates were investigated. Plasma sprayed materials are known to contain large amounts of amorphous material. Phase changes during the conversion from amorphous to crystalline materials were investigated as they have been known to lead to failure in many coatings. The second part of this work focused on measuring residual stresses in multilayer EBCs using synchrotron X-ray diffraction (XRD). Strains were resolved spatially, with probe sizes as small as 20 um. Stresses were calculated using mechanical properties of ytterbium silicates, determined with in-situ loading and heating experiments. In-situ and ex-situ heating experiments allowed for the study of changes in stress states that occur in these EBC materials during heating and cooling cycles. Lastly, the interaction of ytterbium silicates with low-melting environmental calcium-magnesium-aluminosilicate (CMAS) glasses was studied. Synchrotron XRD was used to study the influence of CMAS on the stress state in the coating, X-ray computed tomography was used to provide 3D images of coatings, and EDS and TEM analysis were used to study the interactions at the CMAS/ytterbium silicate interface in detail.

Stolzenburg, Fabian

124

Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating  

SciTech Connect

Ytterbium-ion-doped double-clad optical fibres were developed. The differential quantum efficiency of a diode-pumped fibre laser, fabricated on the basis of such optical fibres with a fibre Bragg grating, was 90%. (lasers)

Kurkov, Andrei S; Karpov, V I; Medvedkov, O I; Dianov, Evgenii M; Vasil'ev, Sergei A; Paramonov, Vladimir M; Protopopov, V N [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation); Laptev, A Yu; Gur'yanov, A N; Umnikov, A A; Vechkanov, N I [Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation); Artyushenko, V G; Frahm, J [Advanced Photonic Systems, APhS GmbH, Berlin (Germany)

1999-06-30

125

Ytterbium-porphyrins as a new class of the luminescent labels  

NASA Astrophysics Data System (ADS)

New complexes of ytterbium with asymmetric porphyrins containing substituents in ?-positions and hydrophobic meso-(monophenyl-p-oxypropyl)triphenylporphyrin (OPP) were obtained and characterized by elemental analysis, IR, UV-Vis absorption and luminescence spectroscopy. Electronic absorption, luminescence and luminescence excitation spectra of these complexes were studied at 295 K in DMF solutions and in the water-lecithin medium. The 4f-luminescence of ytterbium-porphyrins in the near infrared (IR) spectral region (?max = 980 nm) is observed under excitation in Soret band (400-430 nm). The effect of substituent in porphyrin macroring on the 4f-luminescent properties was also investigated. The conjugates of these compounds with protein molecules - bovine serum albumin (BSA) were investigated as well. These compounds are interesting at the initial stage of diagnostics of tumor tissues as IR-luminescent probes due to their spectral-luminescent characteristics and some biochemical properties.

Tsvirko, M.; Korovin, Yu; Rusakova, N.

2007-08-01

126

Stress Measurements in Shock-Loaded PBX 9501 with Embedded Longitudinal and Lateral Piezoresistive Ytterbium Gauges  

SciTech Connect

A series of light gas gun impact experiments were performed with piezoresistive ytterbium (Yb) gauges in longitudinal and lateral orientations embedded in the plastic bonded explosive PBX 9501. These experiments were performed to evaluate the feasibility of using this method to measure lateral stresses and shear strength dynamically in PBX 9501. Ytterbium was chosen as a gauge material based on its high piezoresistance changes at low stress levels. Experiments were performed at longitudinal impact stresses of approximately 0.6 GPa, which is above the yield point of Yb, near the dynamic yield point of PBX 9501, at a level that is comparable with other impact data, and relevant to several multidimensional safety tests. Results show that PBX 9501 does maintain strength throughout compression. Because of poor reproducibility observed in the experiments presented, it appears unlikely that stress extraction from these gauge results would yield an estimate of shear strength at this impact stress with acceptable error.

D.E. Hooks

2004-12-15

127

Ytterbium fibre laser with a heavily Yb{sup 3+}-doped glass fibre core  

SciTech Connect

The use of optical fibres with a high concentration of active ions in the fibre core allows the reduction of the active fibre length and the increase in the threshold powers of various nonlinear effects in the fibre, thereby increasing the maximum output power of fibre lasers. For this purpose, we manufactured a highly concentrated ytterbium-doped ({approx}1.0x10{sup 21}cm{sup -3}) phosphate glass for the active fibre core and a pure glass of a similar composition for the fibre cladding. A single-mode fibre is fabricated from these glasses and generation is obtained in an ytterbium laser based on this fibre with the slope efficiency of no less than 60% at a wavelength of 975 nm. (letters)

Bufetov, Igor' A; Semenov, S L; Kosolapov, A F; Mel'kumov, Mikhail A; Dudin, V V; Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation); Galagan, B I; Denker, B I; Osiko, Vyacheslav V; Sverchkov, S E [Laser Materials and Technology Research Center, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2006-03-31

128

Deep hole penetration of rock for oil production using ytterbium fiber laser  

Microsoft Academic Search

This study provides experimental results in investigating the use of a 5.34 kW ytterbium-doped multiclad fiber laser with an emission wavelength of 1.07 microns for creating deep hole configurations in different types of rock for production applications in oil and gas wells. Recent developments in high power fiber lasers offer technical advantages when compared to other industrial lasers that may

Samih I. Batarseh; Brian C. Gahan; Bhargav C. Sharma; Sherif I. Gowelly

2004-01-01

129

Efficient compression of the femtosecond pulses of an ytterbium laser in a gas-filled capillary  

SciTech Connect

A 290-fs radiation pulse of an ytterbium laser system with a central wavelength of 1028 nm and an energy of 145 {mu}J was compressed to a 27-fs pulse with an energy of 75 {mu}J. The compression was realised on the basis of the effect of pulse spectrum broadening in a xenon-filled glass capillary for a pulse repetition rate of 3kHz. (control of laser radiation parameters)

Konyashchenko, Aleksandr V; Losev, Leonid L; Tenyakov, S Yu

2011-07-31

130

Effect of ytterbium co-doping on erbium clustering in silica-doped glass  

NASA Astrophysics Data System (ADS)

The effect of ytterbium co-doping on erbium ion clustering in silica-based glass was studied. It was experimentally shown that the pump-to-signal conversion efficiency could be significantly increased if the number of Yb3+ ions in the fiber core was 20 times higher than the number of Er3+ ions. Estimations of the number of Er3+ ions in clusters confirmed a decrease in their clustering at high Yb concentrations.

Kiritchenko, N. V.; Kotov, L. V.; Melkumov, M. A.; Likhachev, M. E.; Bubnov, M. M.; Yashkov, M. V.; Laptev, A. Yu; Guryanov, A. N.

2015-02-01

131

On thermal effects in solid-state lasers: The case of ytterbium-doped materials  

Microsoft Academic Search

A review of theoretical and experimental studies of thermal effects in solid-state lasers is presented, with a special focus on diode-pumped ytterbium-doped materials. A large part of this review provides however general information applicable to any kind of solid-state laser. Our aim here is not to make a list of the techniques that have been used to minimize thermal effects,

Sébastien Chénais; Frédéric Druon; Sébastien Forget; François Balembois; Patrick Georges

2006-01-01

132

Experimental Performance of a Single-Mode Ytterbium-doped Fiber Ring Laser with Intracavity Modulator  

NASA Technical Reports Server (NTRS)

We have developed a linearly polarized Ytterbium-doped fiber ring laser with a single longitudinal mode output at 1064 run. A fiber-coupled intracavity phase modulator ensured mode-hop free operation and allowed fast frequency tuning. The fiber laser was locked with high stability to an iodine-stabilized laser, showing a frequency noise suppression of a factor approx 10 (exp 5) at 1 mHz

Numata, Kenji; Camp, Jordan

2012-01-01

133

A new approach to controlling the ytterbium fibre laser output power  

SciTech Connect

A new approach has been proposed for controlling the linearly polarised output of an ytterbium-doped double-clad fibre laser: inverted-population modulation via loss modulation in a competing channel. The steady-state output power of the working channel has been determined as a function of loss in the competing channel. The results are qualitatively interpreted in terms of standard models of a dual-channel laser.

Voronin, V G; Nanii, Oleg E; Sus'yan, A A; Khlystov, V I [Optics and Spectroscopy Chair, Physics Department, Lomonosov Moscow State University, Moscow (Russian Federation)

2010-02-28

134

Behavior of the Yb3+ Ion on Anomalous Sites in Ytterbium-Doped Yttrium Iron Garnet  

Microsoft Academic Search

The theoretical behavior of the Yb3+ ion on octahedral a sites in ytterbium-doped YIG is examined with regard to some of the so-called anomalous properties of this substance. First, a simple spin Hamiltonian is proposed and discussed in the light of the crystal-field properties of the anomalous site. Next, the implications of the model for static torque are derived and

Richard S. Alben

1968-01-01

135

[Double cladding ytterbium doped superfluorescence fiber source with 3 dB bandwidth reaching up to 80 nm].  

PubMed

The present paper reports a double pass forward superfluorescent fiber source (SFS), which uses a length of large mode area double cladding ytterbium doped fiber as gain medium. The maximum output power of this SFS is 341 mW. With the output power between 201 and 341 mW, the 3dB bandwidth of this SFS was more than 80 nm. This is the widest 3 dB bandwidth obtained from ytterbium doped SFS. The output power of the SFS linearly increased with the increment of the pump source injected current. It's output power is not very high, but under normal circumstances, it could meet the needs of the SFS. From the energy level structure of ytterbium ions and the absorption cross-section/emission cross section of ytterbium ions in quartz substrate, the physical mechanisms responsible for superfluorescence were analyzed. This double-cladding ytterbium-doped superfluorescent fiber laser benefits from the superfluorescence radiation near 1 025 and 1 075 nm, so the superfluorescence with 3 dB bandwidth reaching up to 80 nm could be obtained. PMID:23387175

Han, Xu; Feng, Guo-Ying; Han, Jing-Hua; Wu, Chuan-Long; Zhou, Shou-Huan

2012-11-01

136

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2010 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2010-07-01

137

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2012 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2012-07-01

138

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2014 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2014-07-01

139

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2011 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2011-07-01

140

29 CFR 1952.175 - Changes to approved plans.  

Code of Federal Regulations, 2013 CFR

...FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to approved...with part 1953 of this chapter, the California carcinogen program implemented on... (b) On January 1, 1978, the California Department of Industrial...

2013-07-01

141

9 CFR 381.175 - Records required to be kept.  

Code of Federal Regulations, 2012 CFR

... Section 381.175 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE...of any poultry, for commerce, for use as human food or animal food; (2) Any person that engages in the...

2012-01-01

142

View of 175 ton hoisthouse from northeast. Hoist operator's cab ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

143

Facility No. 175, exterior oblique view of northeast and northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

144

Facility No. 175, elevation of southeast side from the airfield, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, elevation of southeast side from the airfield, corner of Facility No. 176 is to the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

145

Facility No. 175, interior of office space on second floor ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, interior of office space on second floor of northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

146

Facility No. 175, interior detail showing rolling doors, trusses, and ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, interior detail showing rolling doors, trusses, and angled monitor roof - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

147

Facility No. 175, interior overview from secondfloor corridor on northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, interior overview from second-floor corridor on northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

148

26 CFR 1.175-5 - Percentage limitation and carryover.  

Code of Federal Regulations, 2013 CFR

...year is limited to 25 percent of his “gross income from farming”. (2) Definition of “gross income from farming.” For the purpose of section 175, the term gross income from farming means the gross income of the taxpayer, derived...

2013-04-01

149

26 CFR 1.175-5 - Percentage limitation and carryover.  

Code of Federal Regulations, 2011 CFR

...year is limited to 25 percent of his “gross income from farming”. (2) Definition of “gross income from farming.” For the purpose of section 175, the term gross income from farming means the gross income of the taxpayer, derived...

2011-04-01

150

26 CFR 1.175-5 - Percentage limitation and carryover.  

Code of Federal Regulations, 2012 CFR

...year is limited to 25 percent of his “gross income from farming”. (2) Definition of “gross income from farming.” For the purpose of section 175, the term gross income from farming means the gross income of the taxpayer, derived...

2012-04-01

151

26 CFR 1.175-5 - Percentage limitation and carryover.  

Code of Federal Regulations, 2014 CFR

...year is limited to 25 percent of his “gross income from farming”. (2) Definition of “gross income from farming.” For the purpose of section 175, the term gross income from farming means the gross income of the taxpayer, derived...

2014-04-01

152

26 CFR 1.175-5 - Percentage limitation and carryover.  

Code of Federal Regulations, 2010 CFR

...year is limited to 25 percent of his “gross income from farming”. (2) Definition of “gross income from farming.” For the purpose of section 175, the term gross income from farming means the gross income of the taxpayer, derived...

2010-04-01

153

40 CFR 60.175 - Monitoring of operations.  

Code of Federal Regulations, 2012 CFR

...PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and...

2012-07-01

154

40 CFR 60.175 - Monitoring of operations.  

Code of Federal Regulations, 2014 CFR

...PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and...

2014-07-01

155

Interior view of 175 ton hoist house looking at the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior view of 175 ton hoist house looking at the exterior casing for the wire rope spools. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

156

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride)...

2012-04-01

157

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride)...

2011-04-01

158

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride)...

2013-04-01

159

21 CFR 175.270 - Poly(vinyl fluoride) resins.  

Code of Federal Regulations, 2014 CFR

...and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride)...

2014-04-01

160

40 CFR 68.175 - Prevention program/Program 3.  

Code of Federal Regulations, 2014 CFR

...PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...type of training provided—classroom, classroom plus on the job, on the job...recent change that triggered management of change procedures and...

2014-07-01

161

40 CFR 68.175 - Prevention program/Program 3.  

Code of Federal Regulations, 2011 CFR

...PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...type of training provided—classroom, classroom plus on the job, on the job...recent change that triggered management of change procedures and...

2011-07-01

162

40 CFR 68.175 - Prevention program/Program 3.  

Code of Federal Regulations, 2012 CFR

...PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...type of training provided—classroom, classroom plus on the job, on the job...recent change that triggered management of change procedures and...

2012-07-01

163

40 CFR 68.175 - Prevention program/Program 3.  

Code of Federal Regulations, 2013 CFR

...PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...type of training provided—classroom, classroom plus on the job, on the job...recent change that triggered management of change procedures and...

2013-07-01

164

23. 175 TON CAPACITY CHARGING LADLE ON THE CHARGING AISLE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

23. 175 TON CAPACITY CHARGING LADLE ON THE CHARGING AISLE OF THE BOP SHOP LOOKING SOUTH. HISTORIAN FOR SCALE. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

165

Charge-transfer state excitation as the main mechanism of the photodarkening process in ytterbium-doped aluminosilicate fibres  

NASA Astrophysics Data System (ADS)

We have studied photodarkening in ytterbium-doped fibre preforms with an aluminosilicate glass core. Analysis of their absorption and luminescence spectra indicates the formation of stable Yb2+ ions in the glass network under IR laser pumping at a wavelength ? = 915 nm and under UV irradiation with an excimer laser (? = 193 nm). We have performed comparative studies of the luminescence spectra of the preforms and crystals under excitation at a wavelength of 193 nm. The mechanism behind the formation of Yb2+ ions and aluminium – oxygen hole centres (Al-OHCs), common to ytterbium-doped YAG crystals and aluminosilicate glass, has been identified: photoinduced Yb3+ charge-transfer state excitation.

Bobkov, K. K.; Rybaltovsky, A. A.; Vel'miskin, V. V.; Likhachev, M. E.; Bubnov, M. M.; Dianov, E. M.; Umnikov, A. A.; Gur'yanov, A. N.; Vechkanov, N. N.; Shestakova, I. A.

2014-12-01

166

Amplification and ASE suppression in a polarization-maintaining ytterbium-doped all-solid photonic bandgap fibre.  

PubMed

We demonstrate suppression of amplified spontaneous emission at the conventional ytterbium gain wavelengths around 1030 nm in a cladding-pumped polarization-maintaining ytterbium-doped all-solid photonic crystal fibre. The fibre works through combined index and bandgap guiding. Furthermore, we show that the peak of the amplified spontaneous emission can be shifted towards longer wavelengths by rescaling the fibre dimensions. Thereby one can obtain lasing or amplification at longer wavelengths (1100 nm - 1200 nm) as the amount of amplification in the fibre is shown to scale with the power of the amplified spontaneous emission. PMID:18772977

Olausson, C B; Falk, C I; Lyngsø, J K; Jensen, B B; Therkildsen, K T; Thomsen, J W; Hansen, K P; Bjarklev, A; Broeng, J

2008-09-01

167

2.05??m ytterbium–holmium doped all-fiber gain-switched pulsed laser pumped at 1064?nm  

NASA Astrophysics Data System (ADS)

The novel, extremely simple to assemble, design of a ~2.05?µm ytterbium–holmium co-doped all-fiber laser (YHDFL) oscillating in the gain-switching pulsed regime is reported. The YHDFL is pumped by a 1064?nm ytterbium doped fiber laser, while pulsing at ~2.05?µm, is accomplished using an acousto-optic modulator placed between the two lasers. At the optimal conditions, the YHDFL produces a train of very stable, single per modulation period, pulses, 1?µJ in energy and 1?µs in duration at a 3?dB level, at repetition rates of 50…60?kHz.

Kir’yanov, A. V.; Barmenkov, Yu O.; Minkovich, V. P.

2014-12-01

168

Divalent ytterbium ions in yttrium aluminum garnet and yttrium oxide ceramics  

NASA Astrophysics Data System (ADS)

Laser ceramics based on ytterbium-doped yttrium aluminum garnet and yttrium oxide are synthesized. The transmission, pulsed cathodoluminescence, and electron-spin resonance spectra of these ceramics at room temperature are measured and analyzed. It is shown that all the samples contain Yb2+ ions with the 4 f 136 s electronic configuration of the ground state, which manifest themselves in the form of relatively weak bands in the IR region of the optical spectra in addition to the bands of Yb3+ ions.

Solomonov, V. I.; Orlov, A. N.; Spirina, A. V.; Konev, S. F.; Cholakh, S. O.; Luk'yashin, K. E.

2014-12-01

169

Long-range Rydberg-Rydberg interactions in calcium, strontium and ytterbium  

E-print Network

Long-range dipole-dipole and quadrupole-quadrupole interactions between pairs of Rydberg atoms are calculated perturbatively for calcium, strontium and ytterbium within the Coulomb approximation. Quantum defects, obtained by fitting existing laser spectroscopic data, are provided for all $S$, $P$, $D$ and $F$ series of strontium and for the $^3P_2$ series of calcium. The results show qualitative differences with the alkali metal atoms, including isotropically attractive interactions of the strontium $^1S_0$ states and a greater rarity of F\\"orster resonances. Only two such resonances are identified, both in triplet series of strontium. The angular dependence of the long range interaction is briefly discussed.

C. L. Vaillant; M. P. A. Jones; R. M. Potvliege

2012-03-16

170

Long-range Rydberg-Rydberg interactions in calcium, strontium and ytterbium  

E-print Network

Long-range dipole-dipole and quadrupole-quadrupole interactions between pairs of Rydberg atoms are calculated perturbatively for calcium, strontium and ytterbium within the Coulomb approximation. Quantum defects, obtained by fitting existing laser spectroscopic data, are provided for all $S$, $P$, $D$ and $F$ series of strontium and for the $^3P_2$ series of calcium. The results show qualitative differences with the alkali metal atoms, including isotropically attractive interactions of the strontium $^1S_0$ states and a greater rarity of F\\"orster resonances. Only two such resonances are identified, both in triplet series of strontium. The angular dependence of the long range interaction is briefly discussed.

Vaillant, C L; Potvliege, R M

2012-01-01

171

Optical excitation and decay dynamics of ytterbium atoms embedded in a solid neon matrix.  

SciTech Connect

Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p {sup 3}P{sub 0} level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.

Xu, C.-Y.; Hu, S.-M.; Singh, J.; Bailey, K.; Lu, Z.-T.; Mueller, P.; O'Connor, T. P.; Welp, U. (Materials Science Division); ( PHY); (Univ. of Chicago); (Univ. of Science and Technology of China)

2011-09-01

172

Sub-60-fs ytterbium-doped fiber laser with a fiber-based dispersion compensation.  

PubMed

We present a mode-locked ytterbium fiber laser with a higher-order mode fiber compensating the group-velocity dispersion and partially the third-order dispersion of the single-mode fiber at a wavelength of 1 microm. The generated pulses had an energy of 0.5 nJ and could be dechirped externally to a pulse duration of less than 60 fs. The power spectrum shows a spectral full width at half-maximum of 57 nm. PMID:17700789

Schultz, Michael; Prochnow, Oliver; Ruehl, Axel; Wandt, Dieter; Kracht, Dietmar; Ramachandran, Siddharth; Ghalmi, Samir

2007-08-15

173

Optical Excitation and Decay Dynamics of Ytterbium Atoms Embedded in a Solid Neon Matrix  

SciTech Connect

Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p {sup 3}P{sub 0} level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.

Xu, C.-Y.; Lu, Z.-T. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States); Hu, S.-M. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China); Singh, J.; Bailey, K.; Mueller, P.; O'Connor, T. P. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Welp, U. [Material Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2011-08-26

174

The hyperfine interaction in the odd isotope of ytterbium fluoride, 171YbF  

NASA Astrophysics Data System (ADS)

The pure rotational spectrum of a minor isotopologue of ytterbium fluoride, 171YbF, in the X2?+ (v = 0) state has been recorded using Fourier transform microwave (FTMW) spectroscopy and pump/probe microwave optical double resonance (PPMODR) spectroscopy. The pure rotational spectra and precisely measured splittings in the (0, 0) A2?1/2 ? X2?+ band were analyzed to produce an improved set of fine and magnetic hyperfine parameters for the X2?+ (v = 0) state of 171YbF. A comparison with theoretical predictions is made.

Glassman, Zachary; Mawhorter, Richard; Grabow, Jens-Uwe; Le, Anh; Steimle, Timothy C.

2014-06-01

175

Single-Polarisation, Single-Frequency, 2 cm Ytterbium-Doped Fibre Laser  

SciTech Connect

A single-polarisation, single-frequency, ytterbium-doped silica fibre laser has been demonstrated in a 2 cm linear cavity. The output power reaches 35 mW with an optical signal-to-noise ratio greater than 65 dB. A polarisation-maintaining fibre Bragg grating is used as the polarisation-dependent reflector to generate the single-polarisation output with the polarisation extinction ratio greater than 20 dB. The laser works stably for two hours under laboratory conditions.

Guan, W.; Marciante, J.R.

2007-05-23

176

26 CFR 1.175-4 - Definition of “land used in farming.”  

Code of Federal Regulations, 2010 CFR

... false Definition of âland used in farming.â 1.175-4 Section 1.175-4...175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the...

2010-04-01

177

26 CFR 1.175-4 - Definition of “land used in farming.”  

Code of Federal Regulations, 2013 CFR

... false Definition of âland used in farming.â 1.175-4 Section 1.175-4...175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the...

2013-04-01

178

26 CFR 1.175-4 - Definition of “land used in farming.”  

Code of Federal Regulations, 2011 CFR

... false Definition of âland used in farming.â 1.175-4 Section 1.175-4...175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the...

2011-04-01

179

26 CFR 1.175-4 - Definition of “land used in farming.”  

Code of Federal Regulations, 2014 CFR

... false Definition of âland used in farming.â 1.175-4 Section 1.175-4...175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the...

2014-04-01

180

26 CFR 1.175-4 - Definition of “land used in farming.”  

Code of Federal Regulations, 2012 CFR

... false Definition of âland used in farming.â 1.175-4 Section 1.175-4...175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the...

2012-04-01

181

120?W subnanosecond ytterbium-doped double clad fiber amplifier and its application in supercontinuum generation  

NASA Astrophysics Data System (ADS)

We report a 120?W high average power all-fiber subnanosecond master oscillator power amplifier (MOPA) system with a two-stage amplifier chain. The seed source is an ytterbium-doped single mode fiber laser passively mode-locked by nonlinear polarization rotation (NPR). Its pulse width is tunable from 0.59?ns to 1.2?ns by changing the length of the laser cavity. The average output power of 91.5?mW is obtained at 26.3?MHz with pulse width of 0.59?ns. A large mode area double cladding high-absorption ytterbium-doped fiber is introduced into the master power amplifier to suppress the nonlinear effects. Finally, 120?W average output power is obtained with single pulse energy of 4.56??J, and its optical-to-optical conversion efficiency is up to 83.9%. In addition, we demonstrate 19.5?W average-power supercontinuum generation in photonic crystal fiber (PCF) using this subnanosecond pulsed fiber amplifier.

Chi, J.-J.; Li, P.-X.; Hu, H.; Yao, Y.-F.; Zhang, G.-J.; Yang, C.; Zhao, Z.-Q.

2014-08-01

182

Usefulness of ytterbium(III) as analytical reagent for total sulfite determination in white wine samples.  

PubMed

Ytterbium(III) is used as reagent for the determination of sulfite by measuring the formation of the Yb(III)-sulfite complex through the variation of the light scattering intensity with time. The low solubility of this complex causes an efficient dispersion of the radiation at 490 nm, which is measured at 980 nm. Each kinetic datum is automatically obtained in only 0.5 s by stopped-flow mixing technique. The application of the initial rate method using a long emission wavelength minimizes the potential interference of fluorescent background signals from the sample matrix. The dynamic range of the calibration graph is 1-250 microg/mL, and the calculated detection limit is 0.35 microg/mL. The precision, expressed as relative standard deviation, is <6%. The method has been applied to the determination of total sulfites in white wine samples, which requires only the sample dilution and the use of two aliquots to improve selectivity. However, the matrix effect found for red wines precludes the application of the method to the direct analysis of these samples. Analytical recoveries ranged from 96.0 to 106.7%. The results obtained with the proposed method agreed with those provided by the p-rosaniline method. Unlike this method, in which toxic reagents are required, the use of ytterbium(III) as analytical reagent shows the advantage of its low acute toxic rating. PMID:15612754

Rodríguez-Díaz, Rafael Carlos; Aguilar-Caballos, Maria Paz; Gómez-Hens, Agustina

2004-12-29

183

Determination of ytterbium in animal faeces by tungsten coil electrothermal atomic absorption spectrometry.  

PubMed

A method for ytterbium determination in animal faeces by tungsten coil electrothermal atomic absorption spectrometry (TCAAS) was developed. Faeces were dry-ashed in a muffle furnace, the ashes were treated with hydrochloric acid, and 10 mul of sample solution were delivered into 150-W tungsten coil atomizer. A matrix-matching procedure employing a 66-s heating program proved to be efficient for obtaining accurate results. Characteristic mass and detection limit were 7.1 pg and 0.35 mug g(-1) Yb, respectively. The tungsten coil atomizer lifetime exceeded 300 firings with digested solutions and R.S.D. of measurements was 1.9% after ten consecutive injections of 10.0 mug l(-1) Yb. Accuracy of the proposed method was assessed by employing a graphite furnace atomic absorption spectrometric procedure. Application of the paired t-test did not reveal any significant difference for ytterbium contents determined by both methods at 95% confidence level. It was demonstrated that the proposed procedure can successfully be used for evaluation of kinetic passage rate of feed through digestive tract of animals. PMID:18967363

Lima, E C; Krug, F J; Nóbrega, J A; Nogueira, A R

1998-11-01

184

1744 OPTICS LETTERS / Vol. 21, No. 21 / November 1, 1996 Dual-stage erbium-doped, erbium/ytterbium-codoped  

E-print Network

1744 OPTICS LETTERS / Vol. 21, No. 21 / November 1, 1996 Dual-stage erbium-doped, erbium Received June 3, 1996 By concatenating an aluminum-codoped erbium-doped fiber with an efficient erbium energy transfer between erbium and ytterbium ions, we are able to pump the second stage with a high

Park, Namkyoo

185

Ytterbium- and chromium-doped fibre laser: from chaotic self-pulsing to passive Q-switching  

E-print Network

A spontaneously chaotic, self-pulsing ytterbium-doped fibre laser is partially stabilized into the passively Q-switched mode of operation using a chromium-doped saturable absorber fibre. This original all-fibre laser produces sustained and stable trains of smooth pulses at high repetition rate.

Dussardier, Bernard; Peterka, P

2011-01-01

186

Highly selective and responsive visible to near-IR ytterbium emissive probe for monitoring mercury(II).  

PubMed

A new lanthanide probe based on the fluorescence resonance energy transfer (FRET) process with the combination of ytterbium porphyrinate complex and a rhodamine?B derivative unit was synthesized to detect the Hg(2+) ion with responsive emission in the visible and near-IR region with a detection limit of 10??M. PMID:24425677

Zhang, Tao; Chan, Chi-Fai; Lan, Rongfeng; Wong, Wai-Kwok; Wong, Ka-Leung

2014-01-20

187

JOURNAL OF CATALYSIS 175, 220225 (1998) ARTICLE NO. CA982016  

E-print Network

JOURNAL OF CATALYSIS 175, 220­225 (1998) ARTICLE NO. CA982016 Enhanced Catalytic Activity of Air-Calcined, 1998 The catalytic activity of the air-calcined catalyst of CrF3 · 4H2O for the fluorination reaction the Fermi energy level in this catalyst. The increased catalytic activity of the air- calcined sample

Kim, Sehun

188

ATMOSPHERIC ELSEVIER AtmosphericResearch 37 (1995) 175-209  

E-print Network

in favor of the contention that the greenhouse effect of * Correspondingauthor. 0169-8095/95/$09.50 © 1995ATMOSPHERIC RESEARCH ELSEVIER AtmosphericResearch 37 (1995) 175-209 Long-term changes regions together with the known globally-distributedforcing due to anthropogenic greenhouse gases

Fridlind, Ann

189

Facility No. 175, oblique view of southeast side and southwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, oblique view of southeast side and southwest doors, corner of Facility No. 176 is on the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

190

Facility No. 175, oblique view of southwest doors and northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Facility No. 175, oblique view of southwest doors and northwest side, corner of Facility No. 176 is on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

191

Airfield setting of Facility Nos. 175 and 176, taken from ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Airfield setting of Facility Nos. 175 and 176, taken from north end of Ford Island Runway, with landplane hangars on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

192

Heft 175 Sachin Ramesh Patil Regionalization of an Event Based  

E-print Network

Heft 175 Sachin Ramesh Patil Regionalization of an Event Based Nash Cascade Model for Flood Sachin Ramesh Patil aus Jalgaon, Indien Hauptberichter: Prof. Dr. rer.nat. Dr.-Ing. habil. András Model for Flood Predictions in Ungauged Basins von Dr.-Ing. Sachin Ramesh Patil Eigenverlag des

Cirpka, Olaf Arie

193

Behavioural Brain Research 175 (2006) 9095 Research report  

E-print Network

) are excellent ani- mal models for investigating the effects of early experience on the development of brainBehavioural Brain Research 175 (2006) 90­95 Research report Influence of parenting style on Alcohol Abuse and Alcoholism, Poolesville, USA e Department of Psychiatry, Emory University, Atlanta, USA

Maestripieri, Dario

194

25 CFR 175.40 - Financing of extensions and upgrades.  

Code of Federal Regulations, 2010 CFR

25 Indians 1 2010-04-01 2010-04-01...Financing of extensions and upgrades. 175.40 Section...The utility may extend or upgrade its electric system to...necessary construction. (1) A customer may be allowed...equipment for an extension or upgrade or to install...

2010-04-01

195

Psychological Bulletin 1981. Vol. 89, No. I, 163-175  

E-print Network

of Psychology, 2075 Wcstbrook Mall, Vancouver, British Columbia, Canada V6T 1Y7. conditioned stimulus (USPsychological Bulletin 1981. Vol. 89, No. I, 163-175 Copyright 1981 by the American Psychological Association, Inc. 0033-2909/81/8901-OI63S00.75 Backward Conditioning: A Reevaluation of the Empirical Evidence

Cook, Robert

196

Bis(pentamethylcyclopentadienyl) ytterbium: Electron-transfer reactions with organotransition metal complexes  

SciTech Connect

The divalent lanthanide complex, (Me{sub 5}C{sub 5}){sub 2}Yb, reacts with methylcopper to produce the base-free, ytterbium-methyl complex, (Me{sub 5}C{sub 5}){sub 2}YbMe. This product forms a asymmetric, methyl-bridged dimer in the solid state. The bulky alkyl complex, (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}, displays similar chemistry to (Me{sub 5}C{sub 5}){sub 2}YbMe, but at a reduced reaction rate due to the limited accessibility of the metal in (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}. Copper and silver halide salts react with (Me{sub 5}C{sub 5}){sub 2}V to produce the trivalent halide derivatives, (Me{sub 5}C{sub 5}){sub 2}VX (X + F, Cl, Br, I). The chloride complex, (Me{sub 5}C{sub 5}){sub 2}VCl, reacts with lithium reagents to form the phenyl and borohydride species. Nitrous oxide transfers an oxygen atom to (Me{sub 5}C{sub 5}){sub 2}V producing the vanadium-oxo complex, (Me{sub 5}Ce{sub 5}){sub 2}VO. The trivalent titanium species, (Me{sub 5}C{sub 5}){sub 2}TiX (X = Cl, Br, Me, BH{sub 4}), form bimetallic coordination complexes with (Me{sub 5}C{sub 5}){sub 2}Yb. The magnetic behavior of the products indicates that electron transfer has not occurred. The solid state structures of the chloride and bromide complexes show unusual bend angles for the halide bridges between ytterbium and titanium. A model based on frontier orbital theory has been proposed to account for the bending behavior in these species. The bimetallic methyl complex contains a linear methyl bridge between ytterbium and titanium.

Matsunaga, P.T.

1991-11-01

197

Bis(pentamethylcyclopentadienyl)ytterbium: An investigation of weak interactions in solution using multinuclear NMR spectroscopy  

SciTech Connect

NMR spectroscopy is ideal for studying weak interactions (formation enthalpy {le}20 kcal/mol) in solution. The metallocene bis(pentamethylcyclopentadienyl)ytterbium, Cp*{sub 2}Yb, is ideal for this purpose. cis-P{sub 2}PtH{sub 2}complexes (P = phosphine) were used to produce slow-exchange Cp*{sub 2}YbL adducts for NMR study. Reversible formation of (P{sub 2}PtH){sub 2} complexes from cis-P{sub 2}PtH{sub 2} complexes were also studied, followed by interactions of Cp*{sub 2}Yb with phosphines, R{sub 3}PX complexes. A NMR study was done on the interactions of Cp*{sub 2}Yb with H{sub 2}, CH{sub 4}, Xe, CO, silanes, stannanes, C{sub 6}H{sub 6}, and toluene.

Schwartz, D.J.

1995-07-01

198

Comparative damage study on ytterbium-doped materials for diode-pumped high energy lasers  

NASA Astrophysics Data System (ADS)

We report on a comparative study of the damage threshold of ytterbium-doped laser materials which are important for diode-pumped, high-energy class short pulse lasers. Both surface and bulk damage thresholds at the lasing wavelength of 1030 nm were investigated. A pulse duration of 6.4 ns was chosen which allows a scaling of the damage threshold for gain media in q-switched lasers as well as chirped-pulse amplifiers. In order to achieve comparability and repeatability of the damage measurements the surface preparation of the used samples was kept constant. Furthermore, the correlation of the bulk damage threshold and the UV absorption spectra was analyzed.

Bödefeld, R.; Koerner, J.; Siebold, M.; Wolf, M.; Herrmann, A.; Hein, J.; Kaluza, M. C.

2008-10-01

199

Mode-Locked Thulium Ytterbium Co-Doped Fiber Laser with Graphene Oxide Paper Saturable Absorber  

NASA Astrophysics Data System (ADS)

A mode-locked thulium ytterbium co-doped fiber laser (TYDFL) is proposed and demonstrated by using a commercial graphene oxide (GO) paper as saturable absorber (SA). The GO paper is sandwiched between two fiber ferrules and incorporates a ring laser cavity to generate soliton pulse train operating at 1942.0nm at a threshold multimode pump power as low as 1.8 W. The mode-locked TYDFL has a repetition rate of 22.32 MHz and the calculated pulse width of 1.1 ns. Even though the SA has a low damage threshold, the easy fabrication of GO paper should promote its potential application in ultrafast photonics.

M. Azooz, S.; W. Harun, S.; H., Ahmad; Halder, A.; C. Paul, M.; Pal, M.; K. Bhadra, S.

2015-01-01

200

Arc fusion splicing effects in large-mode-area single-mode ytterbium-doped fibers.  

PubMed

For the first time the effects of arc fusion splicing on the residual stress and refractive index of large-mode-area single-mode ytterbium-doped fibers (YDFs) are investigated using a state-of-the-art three-dimensional concurrent stress-index measurement method. The results, based on a commercially available fiber, describe a host of perturbations that decrease the core/cladding refractive index difference by as much as 1.74 × 10(-3) over an axial length of many hundreds of wavelengths. Simulations indicate that these perturbations result in an expansion of the mode-field-diameter by 39.6% and, based on the measured sample, result in an extra splice loss of 20.8%. The results of this investigation will be useful in the design and optimization of high-power all-fiber YDF lasers and amplifiers. PMID:24216728

Feng, Ting; Jenkins, Micah H; Yan, Fengping; Gaylord, Thomas K

2013-11-10

201

Study on the clock-transition spectrum of cold 171Yb ytterbium atoms  

NASA Astrophysics Data System (ADS)

We present a detailed study of the clock-transition spectrum of cold 171Yb ytterbium atoms in a 1D optical lattice. A typical clock-transition spectrum with a carrier-sideband structure is observed. After minimizing the power broadening effect and compensating the stray magnetic field, the carrier linewidth is narrowed to about 16?Hz for a 60?ms interrogation time. By increasing the interrogation time to 150?ms, the linewidth is further reduced to 6.8?Hz. By applying the bias magnetic field parallel to the clock-laser polarization, a two-peak spectrum corresponding to two ? transitions is obtained. Finally, spin polarization of atoms to a single desired Zeeman sublevel of the ground state is also demonstrated. The presented results will be very useful for developing better optical lattice clocks.

Zhang, Xiaohang; Zhou, Min; Chen, Ning; Gao, Qi; Han, Chengyin; Yao, Yuan; Xu, Peng; Li, Shangyan; Xu, Yilin; Jiang, Yanyi; Bi, Zhiyi; Ma, Longsheng; Xu, Xinye

2015-02-01

202

Studies on Ytterbium-doped Fibre Laser Operating in Different Regimes  

NASA Astrophysics Data System (ADS)

An ytterbium-doped fibre laser with a unidirectional ring cavity containing a polarizer placed between two in-line polarization controllers is presented. Depending on an equivalent saturable absorber, this laser operates in continuous, Q-switched mode-locked or CW mode-locked regimes. The passive method described here allowed us to choose the operating regime of the fibre laser by rotating the two polarization controllers and adjusting the pump power. Results of numerical simulations of pulse propagation in such a mode-locked fibre ring laser are presented, which reveals that the Q-switched mode-locked or CW modelocked regimes can be achieved by aligning the polarizer near the slow or the fast axes of the fibre.

Gan, Y.; Xiang, W. H.; Zhang, G. Z.

2006-10-01

203

Towards optical pumping of ytterbium nuclei embedded in a solid neon matrix  

NASA Astrophysics Data System (ADS)

We have studied the optical excitation and decay dynamics of neutral ytterbium atoms embedded in a cryogenic solid neon matrix. Matrix isolated atoms qualitatively retain the energy level structure of atoms in the gas phase. The transitions are typically blue shifted and significantly broadened to a few hundred cm-1, independent of temperature from 2.6 K to 4.2 K. The transition width is found to be homogeneous but not lifetime broadened. We will report our results on spectroscopy, lifetimes, and our attempt to polarize nuclear spins by optical pumping. Applications of such a technique include studies of rare isotopes and tests of fundamental symmetries. This work is supported by DOE, Office of Nuclear Physics, under contract DEAC02-06CH11357.

Xu, Chen-Yu; Singh, Jaideep; Bailey, Kevin; Lu, Zheng-Tian; Mueller, Peter; O'Connor, Thomas

2012-06-01

204

Optical excitation and decay dynamics of ytterbium atoms embedded in solid neon matrix  

NASA Astrophysics Data System (ADS)

We have studied the optical excitation and decay dynamics of neutral ytterbium atoms embedded in cryogenic solid neon. The embedded atoms qualitatively retain the structure and transition property of free atoms in the gas phase. The transitions are shifted by and broadened to typically a few hundred cm-1. The broadening mechanism is found to be homogeneous. Atomic population can be transferred among the internal levels via resonant optical excitation and spontaneous decay. The rates of intercombination transitions between spin-singlet and spin-triplet levels are vastly enhanced, probably due to strong Stark-induced mixing. However, the 6s6p 3P0 level is found to remain metastable, with its lifetime determined to be 14 s for the odd isotopes and a few minutes for the even isotopes. This work is supported by DOE, Office of Nuclear Physics, under contract DEAC02-06CH11357.

Xu, Chen-Yu; Hu, Shuiming; Bailey, Kevin; Lu, Zheng-Tian; Mueller, Peter; O'Connor, Thomas; Singh, Jaideep

2011-06-01

205

Ytterbium-doped silica photonic crystal fiber laser fabricated by the nanoporous glass sintering technique  

NASA Astrophysics Data System (ADS)

Based on the sintering of ytterbium-doped nanoporous glass, a nonchemical vapor deposition process aimed at fabricating a large-mode area of photonic crystal fibers has been proposed for the preparation of active silica glass. With the relatively low doping concentration and boron in the silica glass as benefits, a close refractive index between the core and the cladding was obtained. The refractive index variation indicated good homogeneity of the doped fiber core. Up to 34.8?W laser output was demonstrated with the PCF laser and the slope efficiency was 71.3%. The output laser beam quality had slightly multimode behavior, with a mean M2 of 2.42.

Liu, Shuang; Wang, Meng; Zhou, Qinling; Feng, Suya; Yu, Chunlei; Wang, Longfei; Hu, Lili; Chen, Danping

2014-06-01

206

Gadolinium ytterbium trifluoride, Gd0.81Yb0.19F3.  

PubMed

A new gadolinium ytterbium trifluoride has been grown for the first time by the Czochralski technique. Although GdF(3) and YbF(3) both present a high-temperature phase transition, the mixed compound Gd(0.81)Yb(0.19)F(3) maintains its crystallographic structure upon cooling to room temperature. Taking into account that both Gd(3+) and Yb(3+) ions are distributed randomly on a single site (Wyckoff position 4c), this is attributed to a mean cationic radius coincident with that of the Tb(3+) ion, so that the stability of the crystal structure resembles that of TbF(3). The grown crystal melts noncongruently at ?1413?K, it is transparent and colourless, and it has a high density. PMID:21285491

Vasyliev, Valentyn; Villora, Encarnacion G; Nakamura, Masaru; Sato, Akira; Shimamura, Kiyoshi

2011-02-01

207

146W continuous wave ytterbium doped fiber amplifier at 1009 nm  

NASA Astrophysics Data System (ADS)

In this contribution we demonstrate a single mode continuous wave laser amplifier with 146 W of power at a wavelength of 1009 nm. On one hand this experiments constitutes an extension of the wavelength range of high power fiber lasers, furthermore, emission wavelength well below 1030 nm find use for efficient high-brightness tandem pumping of high power fiber amplifiers. The wavelength and bandwidth of the seed oscillator are defined by a pair of fiber Bragg gratings. This seed is amplified in a two-stage Ytterbium-doped rod-type amplifier to 146 W with a high slope efficiency of 64 %, an excellent beam quality and an ASE-suppression as high as 63 dB.

Beier, F.; Otto, H.-J.; Sattler, B.; Ploetner, M.; Haarlammert, N.; de Vries, O.; Jauregui, C.; Schreiber, T.; Limpert, J.; Eberhardt, R.; Tünnermann, A.

2014-03-01

208

Water dissociation on alpha1-hafnium and ytterbium substituted Dawson polyoxotungstates: a density functional theory study.  

PubMed

Density functional theory (DFT) calculations were devised to get insight into Lewis acidic catalysis by POMs, especially on the intriguing activation of complexed water molecules that was observed in some experimental cases. Computationally, it appears that deprotonation is feasible with [alpha(1)-Hf(H(2)O)P(2)W(17)O(61)](6-), but not with [alpha(1)-Yb(H(2)O)P(2)W(17)O(61)](7-). This reflects the difference of the electronic structures (diamagnetic for hafnium POM, paramagnetic for ytterbium POM). From a mechanistical point of view, indirect Brønsted catalysis cannot be excluded in the hafnium case, especially for Mannich reactions. But our calculations show that catalysis by [alpha(1)-Yb(H(2)O)P(2)W(17)O(61)](7-) (and presumably all the lanthanide series) proceeds through direct complexation of the substrates to the POM. PMID:18610951

Derat, Etienne; Lacôte, Emmanuel; Hasenknopf, Bernold; Thorimbert, Serge; Malacria, Max

2008-12-18

209

All-normal-dispersion passive harmonic mode-locking 220??fs ytterbium fiber laser.  

PubMed

We report a stable passive second-harmonic mode-locked all-normal-dispersion ytterbium fiber laser based on nonlinear polarization evolution. This fiber laser has two polarization beam splitter output ports for optimizing the output spectrum 5 ps duration pulses with 187 mW average power being generated at the harmonic repetition rate of 99.6 MHz. By use of a pair of gratings to extracavity compensate the chirp, the pulse is further compressed to 220 fs. We measured that the peak-to-pedestal extinction of the radio frequency is about 80 dB corresponding to a pulse-to-pulse energy fluctuation of 0.32% and timing jitter of 3.2 ps. PMID:25320915

Wang, Junli; Bu, Xiangbao; Wang, Rui; Zhang, Long; Zhu, Jiangfeng; Teng, Hao; Han, Hainian; Wei, Zhiyi

2014-08-10

210

Nonlinear dynamics of Ytterbium-doped fiber laser Q-switched using acousto-optical modulator  

NASA Astrophysics Data System (ADS)

A comprehensive experimental analysis of the dynamics of an ytterbium-doped fiber laser actively Q-switched (QS) using an intracavity acousto-optical modulator (AOM) is presented. It is shown that type of QS pulsing strongly depends on AOM repetition rate and pump power. In particular, at low repetition rates, including zero-rate, and at relatively high pump powers peculiar QS pulsing, switched by stimulated Brillouin scattering (SBS), is established in the laser. The cause of such kind of pulsing is the SBS-process boosted by spurious narrow-line CW lasing that arises in auxiliary low-Q cavity formed by an output coupler (in our experiments - fiber Bragg gratings) and weak reflections from blocked AOM. The parameters' area where this regime occurs is limited by certain values of pump power and AOM repetition rate. At increasing AOM repetition rate or decreasing pump power spurious CW lasing is not attained in the system; consequently, the SBS type of QS fades, while "conventional" QS (CQS) lasing is established in the system and remains. However CQS pulsing strongly suffers the nonlinear-dynamics effects: depending on AOM repetition rate and pump power the laser switches to common P1, P2, or P3 attractors, when QS pulses arise at sub-harmonics of AOM repetition rate, or to the specific transient regimes between them, or to chaotic operation. These and other sides (e.g. pulse jittering) of operation of the QS ytterbium-doped fiber laser with AOM are under scope of the present review as they have big interest for practical applications.

Barmenkov, Y. O.; Kir'yanov, A. V.; Andres, M. V.

2014-12-01

211

14 CFR 125.175 - Protection of other airplane components against fire.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Protection of other airplane components against fire. 125.175...OPERATIONS CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR...Requirements § 125.175 Protection of other airplane components against fire. (a)...

2010-01-01

212

1 CFR 17.5 - Criteria for emergency filing for public inspection.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Criteria for emergency filing for public inspection. 17.5...PUBLIC INSPECTION AND PUBLICATION SCHEDULES Emergency Schedule § 17.5 Criteria for emergency filing for public inspection. An...

2010-01-01

213

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2011 CFR

...false Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260...260 Partial phosphoric acid esters of polyester resins. Partial phosphoric acid esters of polyester resins identified in this section...

2011-04-01

214

Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup.  

PubMed

We report on the first experimental setup based on a 2D-/3D-magneto-optical trap (MOT) scheme to create both Bose-Einstein condensates and degenerate Fermi gases of several ytterbium isotopes. Our setup does not require a Zeeman slower and offers the flexibility to simultaneously produce ultracold samples of other atomic species. Furthermore, the extraordinary optical access favors future experiments in optical lattices. A 2D-MOT on the strong (1)S0 ? (1)P1 transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow (1)S0 ? (3)P1 intercombination transition. Subsequently, atoms are transferred to a crossed optical dipole trap and cooled evaporatively to quantum degeneracy. PMID:23635183

Dörscher, Sören; Thobe, Alexander; Hundt, Bastian; Kochanke, André; Le Targat, Rodolphe; Windpassinger, Patrick; Becker, Christoph; Sengstock, Klaus

2013-04-01

215

Multi-pulses dynamic patterns in a topological insulator mode-locked ytterbium-doped fiber laser  

NASA Astrophysics Data System (ADS)

Multi-pulse dynamic patterns have been experimentally observed in an Ytterbium-doped fiber laser passively mode locked by a topological insulator (TI) Bi2Te3 saturable absorber (SA). The fundamental mode-locking operation with a repetition rate of ~1.10 MHz was achieved under a pump power of ~160 mW with an appropriate setting of the polarization controller (PC). It was found that through either changing the pump power or rotating the orientation of intra-cavity PC, several characteristic modes have been experimentally observed, including disordered multi-pulses, bunch of pulses, and soliton rains. Simultaneously, quasi-square pulses have also been observed in the laser cavity. Our systematic study clearly demonstrated that TI could be developed as an effective SA for the generation of different pulse operation states in a passively mode-locked all-normal-dispersion Ytterbium-doped fiber laser.

Peiguang, Yan; Rongyong, Lin; Han, Zhang; Zhiteng, Wang; Han, Chen; Shuangchen, Ruan

2015-01-01

216

Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup  

NASA Astrophysics Data System (ADS)

We report on the first experimental setup based on a 2D-/3D-magneto-optical trap (MOT) scheme to create both Bose-Einstein condensates and degenerate Fermi gases of several ytterbium isotopes. Our setup does not require a Zeeman slower and offers the flexibility to simultaneously produce ultracold samples of other atomic species. Furthermore, the extraordinary optical access favors future experiments in optical lattices. A 2D-MOT on the strong 1S0 ? 1P1 transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow 1S0 ? 3P1 intercombination transition. Subsequently, atoms are transferred to a crossed optical dipole trap and cooled evaporatively to quantum degeneracy.

Dörscher, Sören; Thobe, Alexander; Hundt, Bastian; Kochanke, André; Le Targat, Rodolphe; Windpassinger, Patrick; Becker, Christoph; Sengstock, Klaus

2013-04-01

217

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2012 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2012-04-01

218

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2011 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2011-04-01

219

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2013 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2013-04-01

220

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2010 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2010-04-01

221

26 CFR 1.175-3 - Definition of “the business of farming.”  

Code of Federal Regulations, 2014 CFR

...false Definition of âthe business of farming.â 1.175-3 Section 1.175-3...175-3 Definition of “the business of farming.” The method described in section...taxpayer engaged in “the business of farming”. A taxpayer is engaged in the...

2014-04-01

222

Dosimetric characteristics, air-kerma strength calibration and verification of Monte Carlo simulation for a new ytterbium-169 brachytherapy source  

Microsoft Academic Search

Ytterbium-169 ([sup 169]Yb) is a promising new isotope for brachytherapy with a half life of 32 days and an average photon energy of 93 KeV. It has an Ir-192-equivalent dose distribution in water but a much smaller half-value layer in lead (0.2 mm), affording improved radiation protection and customized shielding of dose-limiting anatomic structures. The goals of this study are

Harold Perera; Jeffrey F Williamson; Zuofeng Li; Vivek Mishra; Ali S Meigooni

1994-01-01

223

Ytterbium-doped fibre laser tunable in the range 1017 - 1040 nm with second-harmonic generation  

SciTech Connect

A cladding-pumped ytterbium-doped fibre laser has been tuned to shorter emission wavelengths (from 1040 to 1017 nm). The laser output power obtained has been compared to calculation results. We have studied frequency doubling of the laser in a KTiOPO{sub 4} (KTP) crystal with type II phase matching in the XY plane and demonstrated wavelength tuning in the range 510 - 520 nm. (lasers)

Dontsova, E I; Kablukov, S I; Babin, Sergei A

2013-05-31

224

Realization of quantum non-demolition measurement of nuclear spin 1\\/2 of cold ytterbium atom  

Microsoft Academic Search

We have demonstrated a quantum non-demolition (QND) measurement with a collective spin of cold ytterbium atoms (171Yb) via Faraday rotation interaction, and have observed 1.8-1.5+2.4 dB spin squeezing. Since 171Yb atoms have only a nuclear spin of one-half in the ground state, the system constitutes the simplest spin ensemble and is thus robust against decoherence. Furthermore, we have considered the

T. Takano; R. Namiki; Y. Takahashi

2009-01-01

225

Microstructure, toughness and flexural strength of self-reinforced silicon nitride ceramics doped with yttrium oxide and ytterbium oxide.  

PubMed

Self-reinforced silicon nitride ceramics with additions of either yttrium oxide or ytterbium oxide have been investigated at room temperature after various processing heat treatments. Devitrification of the intergranular phase in these materials is very sensitive to the heat treatment used during processing and does not necessarily improve their strength and toughness. Hot-pressed ceramics without a subsequent devitrification heat treatment were the strongest. The ytterbium oxide-doped silicon nitride ceramics were consistently tougher, but less strong, than the yttrium oxide-doped silicon nitride ceramics. In all the ceramics examined, the fracture toughness showed evidence for R-curve behaviour. This was most significant in pressureless sintered ytterbium oxide-doped silicon nitride ceramics. A number of toughening mechanisms, including crack deflection, bridging, and fibre-like grain pull-out, were observed during microstructural analysis of the ceramics. In common with other silicon nitride-based ceramics, thin amorphous films were found at the grain boundaries in each of the ceramics examined. Arrays of dislocations left in the elongated silicon nitride grains after processing were found to belong to the {101;0}<0001> primary slip system. PMID:11207926

Zheng, Y. S.; Knowles, K. M.; Vieira, J. M.; Lopes, A. B.; Oliveira, F. J.

2001-02-01

226

Hydration of gas-phase ytterbium ion complexes studied by experiment and theory  

SciTech Connect

Hydration of ytterbium (III) halide/hydroxide ions produced by electrospray ionization was studied in a quadrupole ion trap mass spectrometer and by density functional theory (DFT). Gas-phase YbX{sub 2}{sup +} and YbX(OH){sup +} (X = OH, Cl, Br, or I) were found to coordinate from one to four water molecules, depending on the ion residence time in the trap. From the time dependence of the hydration steps, relative reaction rates were obtained. It was determined that the second hydration was faster than both the first and third hydrations, and the fourth hydration was the slowest; this ordering reflects a combination of insufficient degrees of freedom for cooling the hot monohydrate ion and decreasing binding energies with increasing hydration number. Hydration energetics and hydrate structures were computed using two approaches of DFT. The relativistic scalar ZORA approach was used with the PBE functional and all-electron TZ2P basis sets; the B3LYP functional was used with the Stuttgart relativistic small-core ANO/ECP basis sets. The parallel experimental and computational results illuminate fundamental aspects of hydration of f-element ion complexes. The experimental observations - kinetics and extent of hydration - are discussed in relationship to the computed structures and energetics of the hydrates. The absence of pentahydrates is in accord with the DFT results, which indicate that the lowest energy structures have the fifth water molecule in the second shell.

Rutkowski, Philip X; Michelini, Maria C.; Bray, Travis H.; Russo, Nino; Marcalo, Joaquim; Gibson, John K.

2011-02-11

227

Deep hole penetration of rock for oil production using ytterbium fiber laser  

NASA Astrophysics Data System (ADS)

This study provides experimental results in investigating the use of a 5.34 kW ytterbium-doped multiclad fiber laser with an emission wavelength of 1.07 microns for creating deep hole configurations in different types of rock for production applications in oil and gas wells. Recent developments in high power fiber lasers offer technical advantages when compared to other industrial lasers that may now allow economic subsurface applications to rock formations, delivering the beam through optical fiber from the surface via the wellbore. Successful applications in this manner would provide an alternative to conventional methods that employ rotary drilling and shaped charge explosives. Various parameters affecting laser penetration into samples of sandstone and limestone were studied and optimized. A maximum penetration depth of 30 cm for 8.9-mm hole diameter was achieved in limestone, while 15 cm penetration depth was achieved in sandstone with the same hole diameter. In all cases, the hole diameter was no greater than the beam diameter applied.

Batarseh, Samih I.; Gahan, Brian C.; Sharma, Bhargav C.; Gowelly, Sherif I.

2004-09-01

228

All-fiber Q-switched ytterbium-doped fiber laser in MOPA configurations  

NASA Astrophysics Data System (ADS)

An all fiber Q-switched Ytterbium-Doped Fiber "YDF" laser in Master Oscillator Power-Amplifier (MOPA) configuration is proposed theoretically and demonstrated experimentally, and the principle analysis and experimental verification are presented in details. Firstly, the system configuration is designed. The system is composed of the seed and the amplifier stage. Two 915nm LDs are used for pumping light, and the light is coupled into the gain medium of the seed and the amplifier stage by two combiners, respectively. Two Fiber Bragg Gratings (FBGs) are used as ends of the cavity of the seed. One Q-switch is used to modulate output laser of the seed, and the amplifier stage is adopted to amplify the light behind the seed. Then, 10m YDF with single mode is selected for the gain medium of the seed, and 8m YDF with multimode is used as the gain medium of the amplifier stage. The output laser of the seed with a 1.02W average power is realized when the seed pump power is 5.74W, the repetition rate is 20KHz and the action time of the Q-switch is 3.5?s. Meanwhile, a 7.58W pump power of the amplifier stage is used to amplify the seed laser. Finally, output laser with the pulse width of 90ns and the average output power of 4.93W are achieved.

He, Wei; Zhu, Lianqing; Zhang, Yinmin; Dong, Mingli; Chen, Xiaohuai

2013-10-01

229

An Early Investigation of Ytterbium Nanocolloids for Selective and Quantitative “Multi-color” Spectral CT Imaging  

PubMed Central

We report a novel molecular imaging agent based on Ytterbium (Yb) designed for use with Spectral “multi-color” Computed Tomogrphy (CT). Spectral CT or multi-ycolored CT provides all of the benefits of traditional CT, i.e., rapid tomographic X-ray imaging, but in addition, it simultaneously discriminates metal-rich contrast agents based on the elements unique x-ray K-edge energy signature. Our synthetic approach involved the use of organically soluble Yb(III)-complex to produce nanocolloids of Yb of noncrystalline nature incorporating high density of Yb (>500K/nanoparticle) into a stable metal particle. The resultant particles are constrained to vasculature (~200nm) and are highly selective for binding fibrin in the ruptured atherosclerotic plaque. Nanoparticles exhibited excellent signal sensitivity and the spectral CT technique uniquely discriminates the k-edge signal (60keV) of Yb from calcium (bones). Bio-elimination and preliminary bio-distribution studied reflected the overall safety and defined clearance of these particles in a rodent model. PMID:22385324

Pan, Dipanjan; Schirra, Carsten O.; Senpan, Angana; Schmieder, Anne H.; Stacy, Allen J.; Roessl, Ewald; Thran, Axel; Wickline, Samuel A.; Proska, Roland; Lanza, Gregory M.

2012-01-01

230

Gamma-radiation-induced degradation of actively pumped single-mode ytterbium-doped optical fibers  

NASA Astrophysics Data System (ADS)

The integration of optical components into the digital processing units of satellite subsystems has the potential to remove interconnect bottlenecks inherent to the volume, mass, complexity, reliability and crosstalk issues of copper-based interconnects. Assuming on-board high-bandwidth communications will utilize passive optical fibers as a communication channel, this work investigates the impact of gamma irradiation from a Co-60 source on both passive optical fibers and ytterbium-doped single-mode fibers operated as amplifiers for a 1060-nm light source. Standard optical patch cables were evaluated along with active Yb-doped double-clad fibers. Varied exposure times and signal transmission wavelengths were used to investigate the degradation of the fibers exposed to total doses above 100 krad (Si). The effect on the amplified signal gain was studied for the Yb-doped fibers. The increased attenuation in the fibers across a broad wavelength range in response to multiple levels of gamma radiation exposure along with the effect that the increased attenuation has on the actively pumped Yb-doped fiber amplifier performance, is discussed.

Singleton, B.; Petrosky, J.; Pochet, M.; Usechak, N. G.; Francis, S. A.

2014-03-01

231

Volume diffusion of Ytterbium in YAG: thin-film experiments and combined TEM-RBS analysis  

NASA Astrophysics Data System (ADS)

In this study, we address volume diffusion of ytterbium in yttrium aluminum garnet (YAG) using thin-film single crystal diffusion couples. We employ analytical transmission electron microscopy (ATEM) as a tool for combined microstructural and microchemical analysis and compare the results to Rutherford backscattering (RBS) analysis. Given the high spatial resolution of the method, we focus on microstructural changes of the thin-film diffusant source during the diffusion anneal. We evaluate the potential influence of the associated changes in its transport properties on the evolution of concentration profiles in the single crystal substrate. This approach allows us to test the reliability of determination of volume diffusion coefficients from thin-film diffusion experiments. We found that for the chosen experimental setting, the influence of thin-film re-crystallization is small when compared with the experimental uncertainty and good estimates for the volume diffusion coefficients of Yb in YAG can be obtained using standard assumptions. Both Yb-concentration profiles analyzed with ATEM and with RBS give similar results. At 1,450°C and 1 bar, we infer log D Yb (m2/s) values of -19.37 ± 0.07 (TEM) and -19.84 ± 0.02 (RBS). Although the change in thin-film transport properties associated with successive crystallization during the diffusion anneal does not play a major role for our experimental setup, this effect cannot generally be ignored.

Marquardt, Katharina; Petrishcheva, Elena; Abart, Rainer; Gardés, Emmanuel; Wirth, Richard; Dohmen, Ralf; Becker, Hans-Werner; Heinrich, Wilhelm

2010-12-01

232

KNb(1.75)V(0.25)PS(10).  

PubMed

The title compound, potassium diniobium vanadium phospho-rus deca-sulfide, KNb(1.75)V(0.25)PS(10), was obtained by reaction of the elements with a eutectic mixture of KCl/LiCl. It is isostructural with the quaternary KNb(2)PS(10), but the Nb sites are occupied by statistically disordered Nb (87.5%) and V (12.5%) atoms. The structure is composed of anionic (?) (1)[M(2)PS(10)](-) chains (M = Nb/V) separated from each other by K(+) ions. The chain is composed of [MS(8)] distorted bicapped trigonal prisms and [PS(4)] tetra-hedra. There are no inter-chain bonding inter-actions. The crystal used for the X-ray analysis was a racemic twin. PMID:21522232

Yu, Jaemin; Yun, Hoseop

2011-01-01

233

The bright 175um knots of the Andromeda Galaxy  

E-print Network

Discrete far-infrared (FIR) sources of M31 are identified in the ISO 175um map and characterized via their FIR colours, luminosities and masses. With a mean size of 800pc, they probably represent several clouds in chance projection or giant cloud complexes. The 175um data point provides crucial information in addition to the IRAS 60 and 100um data: At least two modified Planck curves with temperatures of about 40K and 15-21K are necessary to fit the SEDs of the knots. We distinguish between three types of knots - cold, medium, warm - in order to recognize trends. Comparisons with radio and optical tracers show that - statistically - the cold knots can be identified well with CO and HI radio sources and thus might represent mainly molecular cloud complexes. The warm knots coincide with known HII regions and supernova remnants. The medium knots might contain a balanced mixture of molecular clouds and HII regions. The cold knots have a considerable luminosity and their discovery raises the question of hidden star formation. Though the optically dark dust lanes in M31 generally match the FIR ring, surprisingly we do not find a convincing coincidence of our knots with individual dark clouds which might therefore show mainly foreground dust features. The ratio of FIR luminosity to dust mass, L/M, is used to measure the energy content of the dust. The knots have a clear L/M excess over the rest of M31, providing evidence that they are powered by star formation in addition to the interstellar radiation field. The L/M ratio of the warm knots is comparable to that of Galactic HII regions like M42 or NGC2024, while that of the cold knots still reaches values like in the average Orion complex. Thus both the warm and the cold knots are interpreted as containing large cloud complexes with considerable ongoing star formation.

L. Schmidtobreick; M. Haas; D. Lemke

2000-09-29

234

Composite chromium and graphene oxide as saturable absorber in ytterbium-doped Q-switched fiber lasers.  

PubMed

In recent years, graphene and its compounds (e.g., oxides) have been used as saturable absorbers in passive Q-switched and mode-locked lasers, leading to the fabrication of compact pulsed fiber lasers. In this article, we study the operation of a Q-switched ytterbium-doped fiber ring laser based on a composite saturable absorber made of graphene oxide and chromium. We show that the addition of a thin layer of chromium can lead to pulse durations ranging from 3.5 to 9.4 ?s and subsequently increasing the laser peak power. PMID:24663318

Liu, Liming; Hattori, Haroldo T; Mironov, Evgeny G; Khaleque, Abdul

2014-02-20

235

Polarization-maintaining amplification of phase modulated pulse employing ytterbium-doped single-mode fiber amplifier  

NASA Astrophysics Data System (ADS)

Polarization-maintaining fiber amplifier using ytterbium-doped single-mode fiber (SMF) is proposed. A 45° Faraday rotator mirror (FRM) and a polarization independent fiber loop circulator (FLC) with polarization-maintaining fiber (PMF) pigtails are used to realize double-pass amplification and birefringence self-compensation. Arbitrary state of polarization (SOP) such as the linear polarization and elliptical polarization can be maintained. Polarization-maintaining amplification of phase modulated pulse with this amplifier is experimentally demonstrated while introducing little intensity modulation itself.

Wang, J. J.; Huang, Z. H.; Xu, D. P.; Deng, Y.; Lin, H. H.; Zhang, R.

2012-02-01

236

Note: Broadly tunable all-fiber ytterbium laser with 0.05 nm spectral width based on multimode interference filter  

SciTech Connect

A multimode interference filter with narrow transmission bandwidth and large self-imaging wavelength interval is constructed and implemented in an ytterbium doped fiber laser in all-fiber format for broad wavelength tunability as well as narrow spectral width of the output beam. The peak transmission wavelength of the multimode interference filter was tuned with the help of a standard in-fiber polarization controller. With this simple mechanism more than 30 nm (1038 nm–1070 nm) tuning range is demonstrated. The spectral width of the output beam from the laser was measured to be 0.05 nm.

Mukhopadhyay, Pranab K., E-mail: pkm@rrcat.gov.in; Gupta, Pradeep K.; Singh, Amarjeet; Sharma, Sunil K.; Bindra, Kushvinder S.; Oak, Shrikant M. [Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013 (India)] [Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013 (India)

2014-05-15

237

Studies on CW and Q-switched mode-locked in passive mode-locked ytterbium-doped fibre laser  

NASA Astrophysics Data System (ADS)

Exploiting the nonlinear polarization rotation technique and adjusting the polarization controllers orientations and the pump power, we achieved stable operations of Q-switched mode-locked or CW modelocked regimes in an ytterbium-doped fibre laser with a unidirectional ring cavity containing a polarizer placed between two in-line polarization controllers. Numerical simulations of pulse propagation in such a modelocked fibre ring laser are performed, which reveals that the Q-switched mode-locked or CW mode-locked regimes can be achieved by aligning the polarizer near the slow or the fast axes of the fibre.

Gan, Y.; Xiang, W. H.; Zhang, G. Z.

2009-03-01

238

Realization of quantum non-demolition measurement of nuclear spin 1/2 of cold ytterbium atom  

NASA Astrophysics Data System (ADS)

We have demonstrated a quantum non-demolition (QND) measurement with a collective spin of cold ytterbium atoms (171Yb) via Faraday rotation interaction, and have observed 1.8-1.5+2.4 dB spin squeezing. Since 171Yb atoms have only a nuclear spin of one-half in the ground state, the system constitutes the simplest spin ensemble and is thus robust against decoherence. Furthermore, we have considered the atomic quantum swapping gate as a quantum information device using multiple Faraday rotation interactions, and have found that we can realize the quantum-domain performance for a realistic experimental condition.

Takano, T.; Namiki, R.; Takahashi, Y.

2009-04-01

239

Strong green emission from alpha-SiAlON activated by divalent ytterbium under blue light irradiation.  

PubMed

This contribution reports on luminescence properties of divalent ytterbium in alpha-SiAlON at room temperature. Ytterbium-doped alpha-SiAlON powders, with the compositions of (M(1-2x/v)Yb(x))(m/v)Si(12-m-n)Al(m+n)O(n)N(16-n) (M = Ca, Li, Mg, and Y, v is the valency of M, 0.002 < or = x < or = 0.10, 0.5 < or = m = 2n < or = 3.5), were synthesized by sintering at 1700 degrees C for 2 h under 0.5 MPa N2. A single, intense, broad emission band, centered at 549 nm, is observed due to the electronic transitions from the excited state 4f(13)5d to the ground state 4f14 of Yb2+. The luminescence of Yb2+ in alpha-SiAlON occurs at relatively low energy, which is attributable to the large crystal field splitting and nephelauxetic effect due to the nitrogen-rich coordination of Yb2+. The dependence of luminescence properties on the Yb2+ concentration, chemical composition, and annealing is discussed. It is suggested that this novel green phosphor could be applied in white light-emitting diodes (LEDs) when combined with a red phosphor and a blue LED. PMID:16852140

Xie, R-J; Hirosaki, N; Mitomo, M; Uheda, K; Suehiro, T; Xu, X; Yamamoto, Y; Sekiguchi, T

2005-05-19

240

26 CFR 1.175-1 - Soil and water conservation expenditures; in general.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 2014-04-01 false Soil and water conservation expenditures; in...Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in...Under section 175, a farmer may deduct his soil or water conservation...

2014-04-01

241

26 CFR 1.175-1 - Soil and water conservation expenditures; in general.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Soil and water conservation expenditures; in...Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in...Under section 175, a farmer may deduct his soil or water conservation...

2011-04-01

242

26 CFR 1.175-1 - Soil and water conservation expenditures; in general.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Soil and water conservation expenditures; in...Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in...Under section 175, a farmer may deduct his soil or water conservation...

2013-04-01

243

26 CFR 1.175-1 - Soil and water conservation expenditures; in general.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Soil and water conservation expenditures; in...Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in...Under section 175, a farmer may deduct his soil or water conservation...

2012-04-01

244

26 CFR 1.175-1 - Soil and water conservation expenditures; in general.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Soil and water conservation expenditures; in...Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in...Under section 175, a farmer may deduct his soil or water conservation...

2010-04-01

245

78 FR 35108 - Special Conditions: Eurocopter France, EC175B; Use of 30-Minute Power Rating  

Federal Register 2010, 2011, 2012, 2013, 2014

...to exceed 175 knots. The EC175B model will have an integrated modular avionics suite with four 6x8 inch multi-function displays termed the Common Integrated Global Avionics for Light Helicopters. This rotorcraft will be capable of...

2013-06-12

246

Artificial Intelligence 175 (2011) 20212060 Contents lists available at ScienceDirect  

E-print Network

Artificial Intelligence 175 (2011) 2021­2060 Contents lists available at ScienceDirect Artificial. In this paper, we argue that techniques from the field of artificial intelligence are instrumental to addressing. Stein et al. / Artificial Intelligence 175 (2011) 2021­2060 services may display significant uncertainty

Southampton, University of

247

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2011-10-01

248

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2012-10-01

249

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2010-10-01

250

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2013-10-01

251

49 CFR 38.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2014 CFR

... 2014-10-01 false High-speed rail cars, monorails and systems. 38.175...and Systems § 38.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2014-10-01

252

Direct asymmetric vinylogous Michael addition of 3-alkylidene oxindoles to chalcones catalyzed by a chiral N,N'-dioxide ytterbium(iii) complex.  

PubMed

A chiral ytterbium(iii)-N,N'-dioxide catalyst system has been developed for the catalytic direct asymmetric vinylogous Michael addition of 3-alkylidene oxindoles to chalcones, delivering the ?-substituted alkylideneoxindoles in high yields, enantioselectivities and good Z/E selectivities under mild reaction conditions. PMID:25413247

Xiao, Xiao; Mei, Hongjiang; Chen, Quangang; Zhao, Xiaohu; Lin, Lili; Liu, Xiaohua; Feng, Xiaoming

2015-01-11

253

Lung clearance, translocation, and acute toxicity of arsenic, beryllium, cadmium, cobalt, lead, selenium, vanadium, and ytterbium oxides following deposition in rat lung  

Microsoft Academic Search

Young adult rats were exposed via inhalation or intratracheal instillation to oxides of arsenic, beryllium, cadmium, cobalt, lead, selenium, vanadium, and ytterbium. Serial necropsies were performed to assess the metal content in organs at times up to several weeks after exposure. The lung clearance varied widely for these compounds, and the times to remove 50% of the initial burden ranged

K. Rhoads; C. L. Sanders

1985-01-01

254

Ytterbium-and chromium-doped fibre laser: from chaotic self-pulsing to passive Q-switching. Bernard Dussardier1  

E-print Network

Ytterbium- and chromium-doped fibre laser: from chaotic self-pulsing to passive Q mode of operation using a chromium-doped saturable absorber fibre. This original all-fibre laser-fibre laser", Electron. Lett., 39, 1307 (2003) [iii] V. Felice et al., "Chromium-doped silica optical fibres

Paris-Sud XI, Université de

255

UV light from the ground term of Ti-like ytterbium, tungsten, and bismuth J. V. Porto, I. Kink, and J. D. Gillaspy  

E-print Network

UV light from the ground term of Ti-like ytterbium, tungsten, and bismuth J. V. Porto, I. Kink, and bismuth. This fills in a gap in previous measurements along this isoelectronic sequence, as well tungsten and bismuth 9 provide strong motivation for measuring them. Electron-beam ion traps EBIT

Chantler, Christopher T.

256

Spectroscopic studies on proton-rich nucleus ^175Pt  

NASA Astrophysics Data System (ADS)

Neutron-deficient nuclei around the Z=82 shell closure are known to exhibit shape coexsistence, due to the interplay between the occupation of specific intruder orbitals and core effects. It is challenging to study such nuclei experimentally, since fission dominates and, as a consequence, evaporation residue cross sections are small. The Recoil Decay Tagging (RDT) technique combined with the use of a large gamma-ray array is a powerful tool to study such nuclei. ^175Pt was investigated with this approach to clarify the structure of this nucleus and to extend the systematics in this region. Excited states were populated by the ^94Mo(^84Sr,2pn) reaction at beam energies of 380 and 385 MeV provided by ATLAS. Prompt gamma rays were detected by Gammasphere and the recoiling nuclei were identified according to their m/q ratio using the FMA. After m/q identification, the recoiling nuclei were implanted in a 40x40 DSSD, where subsequent charge particle decays were measured. An array of four large-volume Ge detectors and one LEPS detector surrounded the DSSD. The results of this measurement will be presented. This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357.

Gürdal, G.; Carpenter, M. P.; Kondev, F. G.; Janssens, R. V. F.; Ahmad, I.; Khoo, T. L.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Zhu, S.; Hartley, D. J.; Riedinger, L. L.

2010-11-01

257

12 CFR 225.175 - What risk management, record keeping and reporting policies are required to make merchant banking...  

Code of Federal Regulations, 2014 CFR

12 Banks and Banking 3 2014-01-01 2014-01-01 false...reporting policies are required to make merchant banking investments? 225.175 Section 225.175 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED)...

2014-01-01

258

12 CFR 225.175 - What risk management, record keeping and reporting policies are required to make merchant banking...  

Code of Federal Regulations, 2011 CFR

12 Banks and Banking 3 2011-01-01 2011-01-01 false...reporting policies are required to make merchant banking investments? 225.175 Section 225.175 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED)...

2011-01-01

259

12 CFR 225.175 - What risk management, record keeping and reporting policies are required to make merchant banking...  

Code of Federal Regulations, 2013 CFR

12 Banks and Banking 3 2013-01-01 2013-01-01 false...reporting policies are required to make merchant banking investments? 225.175 Section 225.175 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED)...

2013-01-01

260

12 CFR 225.175 - What risk management, record keeping and reporting policies are required to make merchant banking...  

Code of Federal Regulations, 2012 CFR

12 Banks and Banking 3 2012-01-01 2012-01-01 false...reporting policies are required to make merchant banking investments? 225.175 Section 225.175 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED)...

2012-01-01

261

25 CFR 175.12 - Procedures for adjusting electric power rates except for adjustments due to changes in the cost...  

Code of Federal Regulations, 2010 CFR

...false Procedures for adjusting electric power rates except for adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2010-04-01

262

25 CFR 175.12 - Procedures for adjusting electric power rates except for adjustments due to changes in the cost...  

Code of Federal Regulations, 2014 CFR

...false Procedures for adjusting electric power rates except for adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2014-04-01

263

25 CFR 175.12 - Procedures for adjusting electric power rates except for adjustments due to changes in the cost...  

Code of Federal Regulations, 2013 CFR

...false Procedures for adjusting electric power rates except for adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2013-04-01

264

25 CFR 175.12 - Procedures for adjusting electric power rates except for adjustments due to changes in the cost...  

Code of Federal Regulations, 2012 CFR

...true Procedures for adjusting electric power rates except for adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2012-04-01

265

25 CFR 175.12 - Procedures for adjusting electric power rates except for adjustments due to changes in the cost...  

Code of Federal Regulations, 2011 CFR

...false Procedures for adjusting electric power rates except for adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175...INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric...

2011-04-01

266

Plasmodium falciparum: further characterization of a functionally active region of the merozoite invasion ligand EBA-175.  

PubMed

A 42 amino acid peptide, Pf EBA-175 (1062-1103), also called EBA-peptide 4 of the 175-kDa Plasmodium falciparum sialic acid binding protein, a putative merozoite invasion ligand, has been shown to be a target of parasite growth inhibitory antibodies. We expressed and purified a recombinant protein, NS1-Pf EBA-175 (946-1133) which included the 42 amino acid peptide, and compared antibodies induced by immunization with the protein to antibodies raised against the 42 amino acid peptide. Sera from rabbits immunized with the recombinant protein and the synthetic peptide immunoprecipitated authentic EBA-175, and had comparable ELISA titers against peptide Pf EBA-175 (1062-1103). However, IFAT titers against infected erythrocytes and growth inhibitory activity were substantially higher in sera from animals immunized with the 42 amino acid synthetic peptide. Epitope mapping of the 42 amino acid peptide identified a 19 amino acid peptide, Pf EBA-175 (1069-1087), which blocked the ability of antibodies against the 42 amino acid peptide to (1) immunoprecipitate EBA-175, (2) bind to the 42 amino acid peptide in an ELISA, and (3) recognize infected parasites in an IFAT. Sera from rabbits immunized with the 19 amino acid peptide conjugated to KLH had excellent parasite growth inhibitory activity (at 1:5 serum dilution, 49.9 +/- 7.4%, mean +/- SD of three separate assays), but the activity was lower in each of the three assays than that of sera from rabbits immunized with the 42 amino acid peptide (67.8 +/- 24.8%). These data indicate that the activity of antibodies raised against the linear 42 amino acid peptide, Pf EBA-175 (1062-1103) are primarily, if not exclusively, directed against 19 of the 42 amino acids, and identify this region of Pf EBA 175 as a target for vaccine development. PMID:7512929

Sim, B K; Carter, J M; Deal, C D; Holland, C; Haynes, J D; Gross, M

1994-05-01

267

Investigation of (d,x) nuclear reactions on natural ytterbium up to 24 MeV  

NASA Astrophysics Data System (ADS)

Production cross-sections of the natYb(d,x)169,170,171,172,173,174m,174,176m,177gLu and 169,175,177Yb reactions have been measured from a 24-MeV deuteron energy down to their respective thresholds by using a stacked-foil activation technique combined with high resolution ?-ray spectrometry. Our new experimental data extended the experimental database toward the lower energy region for 169Yb, 171Lu, 172Lu, and 176mLu, and the higher region for 174Lu, 176mLu, and 177Yb. An overall good agreement is found with some of the earlier measurements, whereas a partial agreement is obtained with the theoretical data extracted from the TENDL-2013 library. The (d,p) channel contribution underestimated by the TENDL-2013 library is successfully reproduced in the global renormalization by Ignatyuk for the FENDL-3.0 library. The production cross-sections of 175Yb available in the literature were revised based on the latest ?-ray intensity adopted in 2004. Physical thick target yields for the investigated reaction products were also deduced and compared with the directly measured ones in the literature. The derived thick target yields for 173Lu and 174gLu are higher than the directly measured ones by Dmitriev et al. at 22 MeV. The deduced yield curves indicate that a low energy (<11 MeV) cyclotron and a highly enriched 176Yb target could be used to obtain 177gLu with negligible impurity from 177mLu.

Khandaker, Mayeen Uddin; Haba, Hiromitsu; Otuka, Naohiko; Usman, Ahmed Rufa'i.

2014-09-01

268

High SBS-threshold, narrowband, erbium codoped with ytterbium fiber amplifier pulses frequency-doubled to 770 nm.  

PubMed

We present results of pulsed, narrowband amplification at 1540.6nm using a polarization maintaining, large mode area gain fiber codoped with erbium and ytterbium. At a repetition rate of 55 kHz, 2.9 W of average 1540.6nm power were generated with a pulse duration of 136 ns, corresponding to an SBS free peak power of 360 W. The amplified signal was frequency doubled in peridically poled potassium titanyl phosphate and conversion efficiencies of up to 56% were generated. When varying the repetition rate between 55-150 kHz the conversion efficiency changed from 56% to 35% due to the limited pump power. PMID:19550717

Dilley, C E; Stephen, M A; Savage-Leuchs, M P

2007-10-29

269

Frequency Stabilization of a 369 nm Diode Laser by Nonlinear Spectroscopy of Ytterbium Ions in a Discharge  

E-print Network

We demonstrate stabilisation of an ultraviolet diode laser via Doppler free spectroscopy of Ytterbium ions in a discharge. Our technique employs polarization spectroscopy, which produces a natural dispersive lineshape whose zero-crossing is largely immune to environmental drifts, making this signal an ideal absolute frequency reference for Yb$^+$ ion trapping experiments. We stabilise an external-cavity diode laser near 369 nm for cooling Yb$^+$ ions, using amplitude-modulated polarisation spectroscopy and a commercial PID feedback system. We achieve stable, low-drift locking with a standard deviation of measured laser frequency ~400 kHz over 10 minutes, limited by the instantaneous linewidth of the diode laser. These results and the simplicity of our optical setup makes our approach attractive for stabilization of laser sources in atomic-physics applications.

Lee, Michael W; Marciniak, Christian; Biercuk, Michael J

2014-01-01

270

Frequency Stabilization of a 369 nm Diode Laser by Nonlinear Spectroscopy of Ytterbium Ions in a Discharge  

E-print Network

We demonstrate stabilisation of an ultraviolet diode laser via Doppler free spectroscopy of Ytterbium ions in a discharge. Our technique employs polarization spectroscopy, which produces a natural dispersive lineshape whose zero-crossing is largely immune to environmental drifts, making this signal an ideal absolute frequency reference for Yb$^+$ ion trapping experiments. We stabilise an external-cavity diode laser near 369 nm for cooling Yb$^+$ ions, using amplitude-modulated polarisation spectroscopy and a commercial PID feedback system. We achieve stable, low-drift locking with a standard deviation of measured laser frequency ~400 kHz over 10 minutes, limited by the instantaneous linewidth of the diode laser. These results and the simplicity of our optical setup makes our approach attractive for stabilization of laser sources in atomic-physics applications.

Michael W Lee; Marie Claire Jarratt; Christian Marciniak; Michael J Biercuk

2014-02-06

271

Frequency stabilization of a 369 nm diode laser by nonlinear spectroscopy of Ytterbium ions in a discharge.  

PubMed

We demonstrate stabilization of an ultraviolet diode laser via Doppler-free spectroscopy of Ytterbium ions in a discharge. Our technique employs polarization spectroscopy, which produces a natural dispersive lineshape whose zero-crossing is largely immune to environmental drifts, making this signal an ideal absolute frequency reference for Yb+ ion trapping experiments. We stabilize an external-cavity diode laser near 369 nm for cooling Yb+ ions, using amplitude modulated polarization spectroscopy and a commercial PID feedback system. We achieve stable, low-drift locking with a standard deviation of measured laser frequency ? 400 kHz over 10 minutes, limited by the instantaneous linewidth of the diode laser. These results and the simplicity of our optical setup makes our approach attractive for stabilization of laser sources in atomic physics applications. PMID:24664069

Lee, Michael W; Jarratt, Marie Claire; Marciniak, Christian; Biercuk, Michael J

2014-03-24

272

Multicolor frequency upconversion luminescence in europium/terbium co-doped ytterbium-sensitized fluorogermanate glass excited at 980 nm  

NASA Astrophysics Data System (ADS)

Glass 80GeO3:10PbF2:10CdF2 triply-doped with europium, terbium, and ytterbium phosphors were synthesized and the energy upconversion luminescence emission properties investigated as a function of NIR excitation power, rare-earth ions content combination, and glass phosphor composition. Multicolor visible luminescence with main emissions peaked around 490, 545, 590, 610, 650, and 700 nm was observed when samples were excited by a diode laser at 980 nm. The up-conversion excitation mechanism for both Eu3+, and Tb3+ excited-states emitting levels was achieved via phononassisted cooperative energy-transfer from pairs of excited Yb3+ ions. White-light emission with CIE-1931 coordinates in the region of low color correlated temperature was obtained for appropriate combination of rare-earth ions content.

Silva, James R.; Gouveia-Neto, Artur S.; Bueno, Luciano A.

2014-02-01

273

Optimal design of a high-power picosecond laser system using a dual-stage ytterbium-doped fibre amplifier  

NASA Astrophysics Data System (ADS)

An average power as high as 60 W with 73 W of pumping was achieved for an ytterbium-doped fibre-based dual-stage amplifier (MOFA) system seeded by a diode-pumped solid-state (DPSS) laser. The corresponding optical conversion efficiency is 80%. The laser system generates a steady pulse train with a pulse width of 11 ps at a repetition rate of 250 MHz or a peak power of 21.8 kW. Moreover, the output beam quality M2 ? 1.6. The length and pumping power for the Yb-doped fibres were optimized to suppress stimulated Raman scattering (SRS) and amplified spontaneous emission (ASE) while maintaining desirable output characteristics.

You, Yi-Jing; Lin, Chih-Hsuan; Zaytsev, Alexey; Tsai, Feng-Hua; Wang, Chi-Luen; Pan, Ci-Ling

2013-07-01

274

Briceo et al.: Courtship after Aromatherapy 175 MALE COURTSHIP BEHAVIOR IN CERATITIS CAPITATA  

E-print Network

Briceño et al.: Courtship after Aromatherapy 175 MALE COURTSHIP BEHAVIOR IN CERATITIS CAPITATA fruit flies Ceratitis capitata (Wiedemann) to ginger root oil ("aromatherapy") increases the likelihood. Key Words: aromatherapy, Ceratitis capitata, close range pheromones, mating behavior, Mediterranean

Bermingham, Eldredge

275

10 CFR 431.175 - Additional requirements applicable to non-Voluntary Independent Certification Program participants.  

Code of Federal Regulations, 2011 CFR

...EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT Provisions for Commercial Heating, Ventilating, Air-Conditioning and Water Heating Products § 431.175 Additional requirements applicable to non-Voluntary Independent...

2011-01-01

276

48 CFR 217.175 - Multiyear contracts for electricity from renewable energy sources.  

Code of Federal Regulations, 2010 CFR

...contracts for electricity from renewable energy sources. 217.175 Section...contracts for electricity from renewable energy sources. (a) The head...electricity from sources of renewable energy, as that term is defined...

2010-10-01

277

27 CFR 20.175 - Shipment for account of another dealer.  

Code of Federal Regulations, 2014 CFR

...ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Operations by Dealers and Users of Specially Denatured Spirits Operations by Dealers § 20.175 Shipment for...

2014-04-01

278

27 CFR 20.175 - Shipment for account of another dealer.  

Code of Federal Regulations, 2013 CFR

...ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Operations by Dealers and Users of Specially Denatured Spirits Operations by Dealers § 20.175 Shipment for...

2013-04-01

279

40 CFR 408.175 - Standards of performance for new sources.  

Code of Federal Regulations, 2011 CFR

...POINT SOURCE CATEGORY Alaskan Mechanized Salmon Processing Subcategory § 408.175...this subpart: (1) Any mechanized salmon processing facility located in population...0 to 9.0. (2) Any mechanized salmon processing facility not covered...

2011-07-01

280

40 CFR 408.175 - Standards of performance for new sources.  

Code of Federal Regulations, 2014 CFR

...POINT SOURCE CATEGORY Alaskan Mechanized Salmon Processing Subcategory § 408.175...this subpart: (1) Any mechanized salmon processing facility located in population...0 to 9.0. (2) Any mechanized salmon processing facility not covered...

2014-07-01

281

40 CFR 408.175 - Standards of performance for new sources.  

Code of Federal Regulations, 2012 CFR

...POINT SOURCE CATEGORY Alaskan Mechanized Salmon Processing Subcategory § 408.175...this subpart: (1) Any mechanized salmon processing facility located in population...0 to 9.0. (2) Any mechanized salmon processing facility not covered...

2012-07-01

282

40 CFR 408.175 - Standards of performance for new sources.  

Code of Federal Regulations, 2013 CFR

...POINT SOURCE CATEGORY Alaskan Mechanized Salmon Processing Subcategory § 408.175...this subpart: (1) Any mechanized salmon processing facility located in population...0 to 9.0. (2) Any mechanized salmon processing facility not covered...

2013-07-01

283

50 CFR 300.175 - Hail-in and hail-out reports.  

Code of Federal Regulations, 2013 CFR

...Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a) The operator of any U.S. vessel that wishes to...

2013-10-01

284

50 CFR 300.175 - Hail-in and hail-out reports.  

Code of Federal Regulations, 2011 CFR

...Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a) The operator of any U.S. vessel that wishes to...

2011-10-01

285

50 CFR 300.175 - Hail-in and hail-out reports.  

Code of Federal Regulations, 2012 CFR

...Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a) The operator of any U.S. vessel that wishes to...

2012-10-01

286

50 CFR 300.175 - Hail-in and hail-out reports.  

Code of Federal Regulations, 2010 CFR

...Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a) The operator of any U.S. vessel that wishes to...

2010-10-01

287

50 CFR 300.175 - Hail-in and hail-out reports.  

Code of Federal Regulations, 2014 CFR

...Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a) The operator of any U.S. vessel that wishes to...

2014-10-01

288

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2011 CFR

...Airplanes: Reciprocating engine-powered: Weight limitations. 121.175...Airplanes: Reciprocating engine-powered: Weight limitations. (a) No...may take off a reciprocating engine powered airplane from an airport...

2011-01-01

289

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2013 CFR

...Airplanes: Reciprocating engine-powered: Weight limitations. 121.175...Airplanes: Reciprocating engine-powered: Weight limitations. (a) No...may take off a reciprocating engine powered airplane from an airport...

2013-01-01

290

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2012 CFR

...Airplanes: Reciprocating engine-powered: Weight limitations. 121.175...Airplanes: Reciprocating engine-powered: Weight limitations. (a) No...may take off a reciprocating engine powered airplane from an airport...

2012-01-01

291

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2014 CFR

...Airplanes: Reciprocating engine-powered: Weight limitations. 121.175...Airplanes: Reciprocating engine-powered: Weight limitations. (a) No...may take off a reciprocating engine powered airplane from an airport...

2014-01-01

292

14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.  

Code of Federal Regulations, 2010 CFR

...Airplanes: Reciprocating engine-powered: Weight limitations. 121.175...Airplanes: Reciprocating engine-powered: Weight limitations. (a) No...may take off a reciprocating engine powered airplane from an airport...

2010-01-01

293

21 CFR 175.230 - Hot-melt strippable food coatings.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food...

2010-04-01

294

21 CFR 175.230 - Hot-melt strippable food coatings.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food...

2012-04-01

295

21 CFR 175.230 - Hot-melt strippable food coatings.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food...

2011-04-01

296

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.260 Partial phosphoric acid esters...

2012-04-01

297

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2014 CFR

...and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.260 Partial phosphoric acid esters...

2014-04-01

298

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.350 Vinyl acetate/crotonic acid...

2010-04-01

299

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.350 Vinyl acetate/crotonic acid...

2012-04-01

300

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.350 Vinyl acetate/crotonic acid...

2011-04-01

301

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.350 Vinyl acetate/crotonic acid...

2013-04-01

302

21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.260 Partial phosphoric acid esters...

2013-04-01

303

21 CFR 175.230 - Hot-melt strippable food coatings.  

Code of Federal Regulations, 2014 CFR

...and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food...

2014-04-01

304

21 CFR 175.230 - Hot-melt strippable food coatings.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food...

2013-04-01

305

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.  

Code of Federal Regulations, 2014 CFR

...and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.350 Vinyl acetate/crotonic acid...

2014-04-01

306

The National Library of Medicine: 175 Years of Innovation | NIH MedlinePlus the Magazine  

MedlinePLUS

... this page please turn Javascript on. The National Library of Medicine 175 Years of Information Innovation Past ... than 40 years! Today, thanks to the National Library of Medicine, virtually any bit of information ever ...

307

34 CFR 303.175 - Policy for contracting or otherwise arranging for services.  

Code of Federal Regulations, 2011 CFR

...175 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF SPECIAL EDUCATION AND REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION EARLY INTERVENTION PROGRAM FOR INFANTS AND TODDLERS WITH...

2011-07-01

308

Inhibitory effects of YM175, a bisphosphonate, on the progression of experimental periodontitis in beagle dogs.  

PubMed

This study examined the efficacy of YM175 [disodium dihydrogen (cycloheptylamino) methylene-1, 1-bisphosphonate] in reducing alveolar bone loss caused by experimental periodontitis in beagle dogs. Thirty-six dogs were used and divided into 6 groups. Periodontitis was induced in 30 dogs (groups 2-6) by ligating the bilateral mandibular third and fourth premolar teeth with silk ligatures and by feeding a soft diet. Six dogs were sham-operated (group 1). Saline (placebo), flurbiprofen (0.02 mg/kg) and YM175 (0.01, 0.1 and 1.0 mg/kg) were administered to the dogs (groups 2-6) 5 d/wk for 25 wk. Radiographic and morphometric analyses were performed. In placebo-treated animals (group 2), the ligation caused a significant decrease in the alveolar bone height by 0.57 and 1.91 mm at 2 and 25 wk, respectively. YM175 (1.0 mg/kg) prevented the decrease in bone height by 47 and 31% at 2 and 25 wk. YM175 (0.1 mg/kg) and flurbiprofen tended to prevent bone loss after 15 wk. Although the ligation elicited no significant change in bone mineral density, it significantly decreased bone volume. YM175 (1.0 mg/kg) and flurbiprofen tended to increase the bone volume. The number of formative or resorptive Haversian canals and the bone turnover through the periosteal bone surface were increased by the ligation, indicating the increased turnover of the cortical bone. YM175 (1.0 mg/kg) reduced the increased bone turnover. The gingival index was maximally increased at 2 wk and was suppressed by YM175. These results suggest that YM175 prevents alveolar bone loss by reducing the increased alveolar bone turnover in dogs with periodontitis. PMID:9689615

O'uchi, N; Nishikawa, H; Yoshino, T; Kanoh, H; Motoie, H; Nishimori, E; Shimaoka, T; Abe, T; Shikama, H; Fujikura, T; Matsue, M; Matsue, I

1998-05-01

309

STUDIES OF MOLECULAR CLOUDS ASSOCIATED WITH H II REGIONS: S175  

SciTech Connect

We are studying the impact of H II regions on star formation in their associated molecular clouds. In this paper, we present James Clerk Maxwell Telescope R x A molecular line observations of S175 and environs. This is the first within a sample of 10 H II regions and their surrounding molecular clouds selected for our study. We first make 7' x 7' maps in {sup 12}CO(2-1), which are used to investigate the structure of the cloud and to identify individual clumps. Single point observations were made in {sup 13}CO(2-1) and CS(5-4) at the peak of the {sup 12}CO(2-1) emission within each clump in order to measure the physical properties of the gas. Densities, temperatures, clump masses, peak velocities, and line widths were measured and calculated using these observations. We have identified two condensations (S175A and S175B) in the molecular cloud associated with this H II region. S175A is adjacent to the ionization front and is expected to be affected by the H II region, while S175B is too distant to be disturbed. We compare the structure and gas properties of these two regions to investigate how the molecular gas has been affected by the H II region. S175A has been heated by the H II region and partially compressed by the ionized gas front, but contrary to our expectation it is a quiescent region while S175B is very turbulent and dynamically active. Our investigation for the source of turbulence in S175B resulted in the detection of an outflow within this region.

Azimlu, Mohaddesseh; Fich, Michel; McCoey, Carolyn [Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1 (Canada)

2009-06-15

310

A multi-wavelength investigation of RCW175: an HII region harboring spinning dust emission  

E-print Network

Using infrared, radio continuum and spectral observations, we performed a detailed investigation of the HII region RCW175. We determined that RCW175, which actually consists of two separate HII regions, G29.1-0.7 and G29.0-0.6, is located at a distance of 3.2+/-0.2 kpc. Based on the observations we infer that the more compact G29.0-0.6 is less evolved than G29.1-0.7 and was possibly produced as a result of the expansion of G29.1-0.7 into the surrounding interstellar medium. We compute a star formation rate for RCW175 of (12.6+/-1.9)x10^{-5} M_{\\sun}/yr, and identified 6 possible young stellar object candidates within its vicinity. Additionally, we estimate that RCW175 contains a total dust mass of 215+/-53 M_{\\sun}. RCW175 has previously been identified as a source of anomalous microwave emission (AME), an excess of emission at cm wavelengths often attributed to electric dipole radiation from the smallest dust grains. We find that the AME previously detected in RCW175 is not correlated with the smallest dust ...

Tibbs, C T; Compiegne, M; Dickinson, C; Alves, M I R; Flagey, N; Shenoy, S; Noriega-Crespo, A; Carey, S; Casassus, S; Davies, R D; Davis, R J

2012-01-01

311

Efficient alcoholysis of 5,6-dihydro-1,10-phenanthroline-5,6-epoxide with ytterbium(III) triflate and subsequent enantioselective transesterification with lipases  

PubMed Central

New 5,6-dihydro-1,10-phenanthroline derivatives were prepared in high yield via ytterbium(III) triflate-catalyzed alcoholysis of the corresponding epoxide. Enzymatic transesterifications of racemic alkoxy alcohols afforded enantioselective separations with up to 99% ee. The lipase derived from Burkholderia cepacia (PSCI) was the most efficient, with E-values of up to 200. The steric effect of substituents in the 6-position on reaction time and enantioselectivities was assessed. PMID:20160975

Schoffers, Elke; Kohler, Lars

2009-01-01

312

A Multi-wavelength Investigation of RCW175: An H II Region Harboring Spinning Dust Emission  

NASA Astrophysics Data System (ADS)

Using infrared, radio continuum, and spectral observations, we performed a detailed investigation of the H II region RCW175. We determined that RCW175, which actually consists of two separate H II regions, G29.1-0.7 and G29.0-0.6, is located at a distance of 3.2 ± 0.2 kpc. Based on the observations we infer that the more compact G29.0-0.6 is less evolved than G29.1-0.7 and was possibly produced as a result of the expansion of G29.1-0.7 into the surrounding interstellar medium. We compute a star formation rate for RCW175 of (12.6 ± 1.9) × 10-5 M ? yr-1, and identified six possible young stellar object candidates within its vicinity. Additionally, we estimate that RCW175 contains a total dust mass of 215 ± 53 M ?. RCW175 has previously been identified as a source of anomalous microwave emission (AME), an excess of emission at centimeter wavelengths often attributed to electric dipole radiation from the smallest dust grains. We find that the AME previously detected in RCW175 is not correlated with the smallest dust grains (polycyclic aromatic hydrocarbons or small carbonaceous dust grains), but rather with the exciting radiation field within the region. This is a similar result to that found in the Perseus molecular cloud, another region which harbors AME, suggesting that the radiation field may play a pivotal role in the production of this new Galactic emission mechanism. Finally, we suggest that these observations may hint at the importance of understanding the role played by the major gas ions in spinning dust models.

Tibbs, C. T.; Paladini, R.; Compiègne, M.; Dickinson, C.; Alves, M. I. R.; Flagey, N.; Shenoy, S.; Noriega-Crespo, A.; Carey, S.; Casassus, S.; Davies, R. D.; Davis, R. J.; Molinari, S.; Elia, D.; Pestalozzi, M.; Schisano, E.

2012-08-01

313

Mutational Analysis of the Pseudomonas aeruginosa Myovirus ?KZ Morphogenetic Protease gp175  

PubMed Central

Pseudomonas aeruginosa myovirus ?KZ has a 270-kb genome within a T=27 icosahedral capsid that contains a large, unusual, and structurally well-defined protein cylindrical inner body (IB) spanning its interior. Proteolysis forms a pivotal stage in ?KZ head and IB morphogenesis, with the protease gp175 cleaving at least 19 of 49 different head proteins, including the major capsid protein and five major structural IB proteins. Here we show that the purified mature form of gp175 is active and cleaves purified IB structural proteins gp93 and gp89. Expression vector synthesis and purification of the zymogen/precursor yielded an active, mature-length protease, showing independent C-terminal gp175 self-cleavage autoactivation. Mutation of either the predicted catalytic serine or histidine inactivated mature gp175, supporting its classification as a serine protease and representing the first such direct biochemical demonstration with purified protease and substrate proteins for any phage protease. These mutations also blocked self-cleavage of the precursor while allowing intermolecular gp175 processing. To confirm the cleavage specificity of gp175, we mutated three cleavage sites in gp93, which blocked proteolysis at these sites. The N-terminal propeptide of gp93 was shown to undergo more extensive proteolysis than previously identified. We found that proteolysis in gp93 progressed from the N to C terminus, while blocking cleavage sites slowed but did not eliminate downstream proteolysis. These findings were shown by informatics to be relevant to the head morphogenesis of numbers of other related IB-containing giant phages as well as to T4 and herpesviruses, which have homologous proteases. PMID:23740980

Thomas, Julie A.

2013-01-01

314

Mode-locked ytterbium fiber lasers using a large modulation depth carbon nanotube saturable absorber without an additional spectral filter  

NASA Astrophysics Data System (ADS)

We demonstrate an all-normal-dispersion ytterbium (Yb)-doped fiber laser mode-locked by a higher modulation depth carbon nanotube saturable absorber (CNT-SA) based on an evanescent field interaction scheme. The laser cavity consists of pure normal dispersion fibers without dispersion compensation and an additional spectral filter. It is exhibited that the higher modulation depth CNT-SA could contribute to stabilize the mode-locking operation within a limited range of pump power and generate the highly chirped pulses with a high-energy level in the cavity with large normal dispersion and strong nonlinearity. Stable mode-locked pulses with a maximal energy of 29?nJ with a 5.59?MHz repetition rate at the operating wavelength around 1085?nm have been obtained. The maximal time-bandwidth product is 262.4. The temporal and spectral characteristics of pulses versus pump power are demonstrated. The experimental results suggest that the CNT-SA provides a sufficient nonlinear loss to compensate high nonlinearity and catch up the gain at a different pump power and thus leads to the stable mode locking.

Pan, Y. Z.; Miao, J. G.; Liu, W. J.; Huang, X. J.; Wang, Y. B.

2014-09-01

315

Z .Aquaculture 175 1999 255268 Halophytes for the treatment of saline aquaculture  

E-print Network

Z .Aquaculture 175 1999 255­268 Halophytes for the treatment of saline aquaculture effluent J. Jed the feasibility of using salt-tolerant plants halophytes as biofilters to remove nutrients from saline aquaculture fraction, using aquaculture effluent generated from an intensive tilapia culture system. The effluent

Smith, Steven E.

316

Heliospheric Energetic Particle Reservoirs: Ulysses and ACE 175-315 keV Electron Observations  

E-print Network

Heliospheric Energetic Particle Reservoirs: Ulysses and ACE 175-315 keV Electron Observations D-3) that evolve similarly in time. We use near-relativistic electron observations from both the ACE and Ulysses 2000 and November 2001 when Ulysses was at high (>70 deg) latitudes and at heliocentric radial

Sanahuja, Blai

317

SIDA 22(1): 151 175. 2006 TAXONOMY OF THE CUSCUTA PENTAGONA COMPLEX  

E-print Network

SIDA 22(1): 151 ­ 175. 2006 TAXONOMY OF THE CUSCUTA PENTAGONA COMPLEX (CONVOLVULACEAE) IN NORTH ABSTRACT Cuscuta pentagona, C. campestris, and C. glabrior are closely similar taxa recognized here three varieties of Cuscuta pentagona Engelm. in addition to the typical form: var. calycina, var

318

USDA Forest Service RMRS-GTR-231. 2010. 175 chApter 10.  

E-print Network

USDA Forest Service RMRS-GTR-231. 2010. 175 chApter 10. Potential Effects of Fuel Management Activities on Riparian Areas Kathleen A. Dwire, Rocky Mountain Research Station, USDA Forest Service, Fort Collins, CO Charles C. Rhoades Michael K. Young, Rocky Mountain Research Station, USDA Forest Service

319

MILITARY MEDICINE, 175, 8;594, 2010 Limitations of the Entomological Operational Risk Assessment  

E-print Network

MILITARY MEDICINE, 175, 8;594, 2010 Limitations of the Entomological Operational Risk AssessmentD ABSTRACT The Entomological Operational Risk Assessment (EORA) is used by the U.S. military to estimate pests. To assist in this protection, the Entomological Operational Risk Assessment (EORA) was created

Peterson, Robert K. D.

320

Bourns College of Engineering, University of California, Riverside EE-175: Senior Design Project  

E-print Network

. Particular focus is on the design and implementation of web-based teleoperational robots using intelligent1 Bourns College of Engineering, University of California, Riverside EE-175: Senior Design Project standing in Electrical Engineering. Objectives The Senior Design Project is the culmination of course work

321

March. 1968 RisB Report No. 175 On the Viscosity and Heat Conductivity  

E-print Network

March. 1968 RisB Report No. 175 On the Viscosity and Heat Conductivity of a Collisionless Plasma of "magnetic viscosity" and "magnetic 3-7)heat conductivity in the hydrodynamic equations '. The expression to Macmahon's result as shown in the appendix. #12;March, 196B Ris« Report No. ITS On the Viscosity and Heat

322

ChemicalGeology, 111 (1994) 155-175 155 Elsevier Science B.V., Amsterdam  

E-print Network

and Vose, 1984). The Amazon's average annual dis- charge of 175,000 m 3 s-1 is 4.6 times that of the Congo River and 11 times that of the Mis- sissippi River (Oltman, 1965 ). In both drain- age area and volume

Konhauser, Kurt

323

Vol. 1, No. 3, Issue 1, Page 175 of 185 Copyright 2007, TSI Press  

E-print Network

Vol. 1, No. 3, Issue 1, Page 175 of 185 Copyright © 2007, TSI® Press Printed in the USA. All rights gestures are translated to commands based on their relative positions on the screen. A state machine-human communication is speech and gesture (including facial expression, hand and body gestures and eye gaze). Some

Wachs, Juan

324

26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.  

Code of Federal Regulations, 2014 CFR

...which does not qualify as “land used in farming,” as defined in § 1.175-4, as...expenditures is in respect of “land used in farming.” (b) Method of allocation. The...expenditures allocable to “land used in farming” generally equals the amount...

2014-04-01

325

26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.  

Code of Federal Regulations, 2010 CFR

...which does not qualify as “land used in farming,” as defined in § 1.175-4, as...expenditures is in respect of “land used in farming.” (b) Method of allocation. The...expenditures allocable to “land used in farming” generally equals the amount...

2010-04-01

326

26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.  

Code of Federal Regulations, 2012 CFR

...which does not qualify as “land used in farming,” as defined in § 1.175-4, as...expenditures is in respect of “land used in farming.” (b) Method of allocation. The...expenditures allocable to “land used in farming” generally equals the amount...

2012-04-01

327

26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.  

Code of Federal Regulations, 2013 CFR

...which does not qualify as “land used in farming,” as defined in § 1.175-4, as...expenditures is in respect of “land used in farming.” (b) Method of allocation. The...expenditures allocable to “land used in farming” generally equals the amount...

2013-04-01

328

26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.  

Code of Federal Regulations, 2011 CFR

...which does not qualify as “land used in farming,” as defined in § 1.175-4, as...expenditures is in respect of “land used in farming.” (b) Method of allocation. The...expenditures allocable to “land used in farming” generally equals the amount...

2011-04-01

329

www.sciencemag.org SCIENCE VOL 317 13 JULY 2007 175 RANDOMSAMPLES  

E-print Network

www.sciencemag.org SCIENCE VOL 317 13 JULY 2007 175 RANDOMSAMPLES E D I T E D BY C O N S TA N C E H, click over to the linked dictionary that furnishes 800 definitions. >> * electrochem, whose study was published online this month in Diabetologia. Lindeberg says the study was inspired when

Gilbert, Pupa Gelsomina De Stasio

330

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2011 CFR

... Navigation and Navigable Waters 2 2011-07-01 2011-07-01...Black Rock Canal and Lock at Buffalo, New York. 162.175 ...Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Black Rock Canal and Lock at Buffalo, New York. In the...

2011-07-01

331

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2012 CFR

... Navigation and Navigable Waters 2 2012-07-01 2012-07-01...Black Rock Canal and Lock at Buffalo, New York. 162.175 ...Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Black Rock Canal and Lock at Buffalo, New York. In the...

2012-07-01

332

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2013 CFR

... Navigation and Navigable Waters 2 2013-07-01 2013-07-01...Black Rock Canal and Lock at Buffalo, New York. 162.175 ...Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Black Rock Canal and Lock at Buffalo, New York. In the...

2013-07-01

333

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2010 CFR

... Navigation and Navigable Waters 2 2010-07-01 2010-07-01...Black Rock Canal and Lock at Buffalo, New York. 162.175 ...Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Black Rock Canal and Lock at Buffalo, New York. In the...

2010-07-01

334

33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.  

Code of Federal Regulations, 2014 CFR

... Navigation and Navigable Waters 2 2014-07-01 2014-07-01...Black Rock Canal and Lock at Buffalo, New York. 162.175 ...Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Black Rock Canal and Lock at Buffalo, New York. In the...

2014-07-01

335

Theoretical Population Biology 59, 175 184 (2001) Quantitative Genetics in the Age of Genomics  

E-print Network

Theoretical Population Biology 59, 175 184 (2001) MINIREVIEW Quantitative Genetics in the Age and I recently attempted to summarize the current state of quantitative genetics (Lynch and Walsh, 1998 the hallmark of a scientifically healthy and active field. As the age of genomics ushers in, continued dramatic

Walsh, Bruce

336

P1. Syst. Evol. 175: 125-138 (1991) --Hant---v-  

E-print Network

sorting (AvIsE & al. 1983, RIESEBERG& al. 1991), and polyploidy (SoLT~S& al. 1990, WOLFE & al. 1990). Thus, as noted by AwsE (1989), "the gene lineage approach can forge links between the disciplines of phylogeneticP1. Syst. Evol. 175: 125-138 (1991) --Hant---v- Systemancs and Evolution Springer-Verlag 199l

Rieseberg, Loren

337

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2012-07-01

338

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2011-07-01

339

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2010-07-01

340

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2013 CFR

... 2012-07-01 true High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2013-07-01

341

36 CFR 1192.175 - High-speed rail cars, monorails and systems.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 false High-speed rail cars, monorails and systems. 1192...and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to...

2014-07-01

342

7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Domestic lamb industry adjustment assistance program...Industry Loans § 4279.175 Domestic lamb industry adjustment assistance program...in the National Office to fund loans to lamb processors for real estate...

2010-01-01

343

49 CFR 175.33 - Shipping paper and notification of pilot-in-command.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Shipping paper and notification of pilot-in-command...and Regulations § 175.33 Shipping paper and notification of pilot-in-command...in an aircraft, a copy of the shipping paper required by §...

2010-10-01

344

Bird [1998] Tectonics, 17(5), 780-801 Appendix I: Algorithm  

E-print Network

1 Bird [1998] Tectonics, 17(5), 780-801 Appendix I: Algorithm Least-Squares Formalism I assume prediction errors (each divided by the variance of the corre- sponding rate) is to be minimized. #12;2 Bird the row equations that state that S is stationary with respect to variations #12;3 Bird [1998] Tectonics

Bird, Peter

345

Evaluation of Hylife-II and Sombrero using 175- and 566- group neutron transport and activation cross sections  

Microsoft Academic Search

Recent modifications to the TART Monte Carlo neutron and photon transport code enable calculation of 566-group neutron spectra. This expanded group structure represents a significant improvement over the 50- and 175-group structures that have been previously available. To support use of this new capability, neutron activation cross section libraries have been created in the 175- and 566-group structures starting from

D Cullen; J Latkowski; J Sanz

1999-01-01

346

Nuclear Instruments and Methods in Physics Research B28 (1987) 175-184 North-Holland, Amsterdam  

E-print Network

Nuclear Instruments and Methods in Physics Research B28 (1987) 175-184 North-Holland, Amsterdam 175.M. GHONIEM Mechanical, Aerospace and Nuclear Engineering Department University of California, Los Angeles for treatment of large-angle nuclear collisions. Small-angle nuclear collisions and electronic stopping

Ghoniem, Nasr M.

347

5 CFR 1201.175 - Judicial review of cases decided under 5 U.S.C. 7702.  

Code of Federal Regulations, 2010 CFR

5 Administrative Personnel 3 2010-01-01...false Judicial review of cases decided under 5 U.S.C. 7702. 1201.175 Section 1201...175 Judicial review of cases decided under 5 U.S.C. 7702. (a) Place and type...

2010-01-01

348

L-band tunable multiwavelength fiber laser using an unpumped polarization maintaining an erbium-ytterbium double-clad fiber-loop mirror  

Microsoft Academic Search

An L-band tunable multiwavelength source is newly proposed and demonstrated employing an unpumped polarization maintaining\\u000a an erbium-ytterbium codoped double-clad fiber (PM-EYDF) loop mirror in a semiconductor optical amplifier-based fiber-ring\\u000a laser. This is achieved by only adjusting the polarization controller in the loop mirror for the birefringence of the PM-EYDF,\\u000a which is polarization dependent, and which originates from the fact that

G. Sun; Y. Chung; D. S. Moon

2008-01-01

349

Large-mode-area erbium-ytterbium-doped photonic-crystal fiber amplifier for high-energy femtosecond pulses at 1.55 µm  

Microsoft Academic Search

We report a high-energy femtosecond fiber amplifier based on an air-cladded single-transverse-mode erbium-ytterbium-codoped photonic-crystal fiber with a 26-µm mode-field-diameter. 700-fs, 47-MHz pulses at 1557 nm were amplified and compressed to near-transform-limited 100-fs, 7.4-nJ pulses with 54-kW peak powers without chirped-pulse amplification. A linearly polarized output with an extinction ratio exceeding 42 dB was obtained by double-pass configuration. As an application,

Akira Shirakawa; Jun Ota; Mitsuru Musha; Ken'Ichi Nakagawa; Ken-Ichi Ueda; Jacob Riis Folkenberg; Jes Broeng

2005-01-01

350

Franck-Condon Factors and Radiative Lifetime of the A^{2}\\Pi_{1/2} - X^{2}\\Sigma^{+} Transition of Ytterbium Monoflouride, YbF  

E-print Network

The fluorescence spectrum resulting from laser excitation of the A^{2}\\Pi_{1/2} - X^{2}\\Sigma^{+} (0,0) band of ytterbium monofluoride, YbF, has been recorded and analyzed to determine the Franck-Condon factors. The measured values are compared with those predicted from Rydberg-Klein-Rees (RKR) potential energy curves. From the fluorescence decay curve the radiative lifetime of the A^{2}\\Pi_{1/2} state is measured to be 28\\pm2 ns, and the corresponding transition dipole moment is 4.39\\pm0.16 D. The implications for laser cooling YbF are discussed.

Zhuang, Xiujuan; Steimle, Timothy C; Bulleid, N E; Smallman, I J; Hendricks, R J; Skoff, S M; Hudson, J J; Sauer, B E; Hinds, E A; Tarbutt, M R

2011-01-01

351

Near-IR Luminescence and Field-Induced Single Molecule Magnet of Four Salen-type Ytterbium Complexes.  

PubMed

A series of rigid hexadentate salen-type (H2L) ytterbium complexes, namely, [Yb2L3(CH3OH)]·3CH3CN (1), [Yb2LL'L?(CH3OH)(H2O)2](ClO4)2·CH3OH·H2O (2), [Yb2L(OAc)4(CH3OH)2]·2CH3OH (3), and {[Yb2L(OAc)4]·3H2O}n (4) (H2L = N,N'-bis(2-oxy-3-methoxybenzylidene)-1,2-phenylenediamine, HL' = 2-(2'-hydroxy-3'-methyloxy-phenyl)benzimidazole and HL" = 3-methoxysalicylaldehyde) have been synthesized by reactions of H2L with multifarious Yb(3+) salts. X-ray crystallographic analyses demonstrate that complex 1 is of a triple-decker sandwich-type Yb2L3 structure with a ratio of H2L/Yb = 3:2, 2 and 3 possess the unique Yb2 core with a ratio of H2L/Yb = 2:2 and 1:2, respectively, 4 exhibits one dimensional coordination polymers in which the polymeric structures are formed by acetate (OAc(-)) groups. All complexes 1-4 exhibit near-IR luminescence, which can be rationalized on the basis of the disparate structural effects. The magnetic analysis unveils that all complexes 1-4 are of field-induced single-molecule magnet behavior with the energy barriers (Ueff/kB) of 14.5, 2.0, 9.5, and 2.4 K at 3 kOe direct current fields, respectively. PMID:25495352

Liu, Tian-Qi; Yan, Peng-Fei; Luan, Fang; Li, Yu-Xin; Sun, Jing-Wen; Chen, Chuan; Yang, Fan; Chen, Han; Zou, Xiao-Yan; Li, Guang-Ming

2015-01-01

352

A Roughness Study of Ytterbium-Doped Potassium Yttrium Tungstate (YB: KYW) Thin-Disk Femtosecond Ablated Dentin  

PubMed Central

Introduction: The aim of this study was to evaluate the morphological changes and quantitatively assess the roughness of dentin after the ablation with a Ytterbium-Doped Potassium Yttrium Tungstate (YB: KYW) thin-disk femtosecond pulsed laser of different fluences, scanning speeds and scanning distances. Method: Twelve extracted human premolars were sectioned into crowns and roots along the cementum-enamel junction, and then the crowns were cut longitudinally into sheets about 1.5 mm thick with a cutting machine. The dentin samples were fixed on a stage at focus plane. The laser beam was irradiated onto the samples through a galvanometric scanning system, so rectangular movement could be achieved. After ablation, the samples were examined with a scanning electron microscope and laser three-dimensional profile measurement microscope for morphology and roughness study.With increasing laser fluence, dentin samples exhibited more melting and resolidification of dentin as well as debris-like structure and occluded parts of dentinal tubules. Results: When at the scanning speed of 2400mm/s and scanning distance of 24?m, the surface roughness of dentin ablated with femtosecond pulsed laser decreased significantly and varied between values of dentin surface roughness grinded with two kinds of diamond burs with different grits. When at the scanning speed of 1200mm/s and scanning distance of 12?m, the surface roughness decreased slightly, and the surface roughness of dentin ablated with femtosecond pulsed laser was almost equal to that grinded with a low grit diamond bur. Conclusion: This study showed that increased laser influence may lead to more collateral damage and lower dentin surface roughness, while scanning speed and scanning distance were also negatively correlated with surface roughness. Adequate parameters should be chosen to achieve therapeutic benefits, and different parameters can result in diverse ablation results. PMID:25606337

Liu, Jing; Chen, Hu; Ge, Wenqi; Wang, Yongbo; Sun, Yuchun; Wang, Yong; Lü, Peijun

2014-01-01

353

Microspherical Laser In Erbium-Ytterbium-Doped Glass G. Nunzi Conti (1), C. Arnaud (2), M. Boustimi (2), P. Fron (2), S. Pelli (1), G.C. Righini (1)  

E-print Network

Microspherical Laser In Erbium-Ytterbium-Doped Glass G. Nunzi Conti (1), C. Arnaud (2), M. Boustimi/2 4 I15/2 transition at 1550 nm of erbium ions in phosphate glass spheres. We also report on the laser emission. Keywords: Whispering Gallery Mode, Erbium, Microlaser, Optical Feedback 1. Introduction

Paris-Sud XI, Université de

354

Effects of prolonged exposure to space flight factors for 175 days on lettuce seeds  

NASA Astrophysics Data System (ADS)

We have studied the effects of prolonged (up to 175 days) exposure of Lactuca sativa seeds to space flight factors, including primary cosmic radiation heavy ions. The data obtained evidence a significant fourfold increase ofs pontaneous mutagenesis in seeds both with regard to the total number of aberrant cells as well as the formation of single cells with multiple aberrations. Comparison of the present experiment with earlier works shows that the frequency of such aberrations increases with the duration of the flight.

Nevzgodina, L. V.; Maximova, E. N.; Akatov, Yu. A.

355

Operation of 17.5 T superconducting magnet system in the last 8 years  

Microsoft Academic Search

A 17.5 T hybrid superconducting magnet with an outer NbâSn section and an inner VâGa section was installed at National Research Institute for Metals (Japan) at the beginning of 1976. Since then the magnet system has been successfully operated about 60 times without any trouble. The magnet still generates the world-highest field in the superconducting state. Ordinarily, it is cooled

K. Tachikawa; Y. Tanaka; K. Inoue; K. Inove; T. Asano; Y. Iijima

1985-01-01

356

Art-175 Is a Highly Efficient Antibacterial against Multidrug-Resistant Strains and Persisters of Pseudomonas aeruginosa  

PubMed Central

Artilysins constitute a novel class of efficient enzyme-based antibacterials. Specifically, they covalently combine a bacteriophage-encoded endolysin, which degrades the peptidoglycan, with a targeting peptide that transports the endolysin through the outer membrane of Gram-negative bacteria. Art-085, as well as Art-175, its optimized homolog with increased thermostability, are each composed of the sheep myeloid 29-amino acid (SMAP-29) peptide fused to the KZ144 endolysin. In contrast to KZ144, Art-085 and Art-175 pass the outer membrane and kill Pseudomonas aeruginosa, including multidrug-resistant strains, in a rapid and efficient (?5 log units) manner. Time-lapse microscopy confirms that Art-175 punctures the peptidoglycan layer within 1 min, inducing a bulging membrane and complete lysis. Art-175 is highly refractory to resistance development by naturally occurring mutations. In addition, the resistance mechanisms against 21 therapeutically used antibiotics do not show cross-resistance to Art-175. Since Art-175 does not require an active metabolism for its activity, it has a superior bactericidal effect against P. aeruginosa persisters (up to >4 log units compared to that of the untreated controls). In summary, Art-175 is a novel antibacterial that is well suited for a broad range of applications in hygiene and veterinary and human medicine, with a unique potential to target persister-driven chronic infections. PMID:24752267

Briers, Yves; Walmagh, Maarten; Grymonprez, Barbara; Biebl, Manfred; Pirnay, Jean-Paul; Defraine, Valerie; Michiels, Jan; Cenens, William; Aertsen, Abram; Miller, Stefan

2014-01-01

357

A SEARCH FOR HERBIG-HARO OBJECTS IN NGC 7023 AND BARNARD 175  

SciTech Connect

Wide-field optical imaging was obtained of the cluster and reflection nebula NGC 7023 and the Bok globule B175. We report the discovery of four new Herbig-Haro (HH) objects in NGC 7023, the first HH objects to be found in this region. They were first detected by their H{alpha} and [S II] emission but are also visible at 3.6 and 4.5 {mu}m in archival Spitzer observations of this field. These HH objects are part of at least two distinct outflows. Both outflows are aligned with embedded 'Class I' young stellar objects in a tight group on the western edge of the nebula. One of the outflows may have a projected distance of 0.75 pc, which is a notable length for an embedded source. No new HH objects were discovered in B175. However, we reclassify the knot HH450X, in B175, as a background galaxy. The discovery that HH 450X is not a shock front weakens the argument that HH 450 and SNR G110.3+11.3 are co-located and interacting.

Rector, T. A. [Department of Physics and Astronomy, University of Alaska Anchorage, Anchorage, AK 99508 (United States); Schweiker, H., E-mail: rector@uaa.alaska.edu, E-mail: heidis@noao.edu [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)

2013-02-01

358

75 FR 24504 - Proposed Modification of VOR Federal Airways V-82, V-175, V-191, and V-430 in the Vicinity of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Modification of VOR Federal Airways V-82, V-175, V-191, and V-430 in the...Omnidirectional Range (VOR) Federal Airways V-82, V-175, V-191, and V- 430 in the...Regulations (14 CFR) part 71 to modify V-82, V-175, V-191, and V-430 in...

2010-05-05

359

75 FR 43813 - Modification of VOR Federal Airways V-82, V-175, V-191, and V-430 in the Vicinity of Bemidji, MN  

Federal Register 2010, 2011, 2012, 2013, 2014

...Modification of VOR Federal Airways V-82, V-175, V-191, and V-430 in the...omnidirectional range (VOR) Federal Airways V-82, V-175, V-191, and V- 430 in the...proposed rulemaking (NPRM) to modify V-82, V-175, V-191, and V-430 in...

2010-07-27

360

42 CFR 84.175 - Half-mask facepieces, full facepieces, hoods, helmets, and mouthpieces; fit; minimum requirements.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Half-mask facepieces, full facepieces, hoods...Particulate Respirators § 84.175 Half-mask facepieces, full facepieces, hoods...minimum requirements. (a) Half-mask facepieces and full facepieces...

2011-10-01

361

42 CFR 84.175 - Half-mask facepieces, full facepieces, hoods, helmets, and mouthpieces; fit; minimum requirements.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Half-mask facepieces, full facepieces, hoods...Particulate Respirators § 84.175 Half-mask facepieces, full facepieces, hoods...minimum requirements. (a) Half-mask facepieces and full facepieces...

2010-10-01

362

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2014 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2014-01-01

363

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2013 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2013-07-01

364

41 CFR 102-73.175 - What types of special purpose space may the Department of Commerce lease?  

Code of Federal Regulations, 2012 CFR

... false What types of special purpose space may the Department of Commerce lease... Acquisition by Lease Special Purpose Space Delegations § 102-73.175 What types of special purpose space may the Department of Commerce...

2012-01-01

365

21 CFR 175.380 - Xylene-formaldehyde resins condensed with 4,4?-isopropylidenediphenol-epichlorohydrin epoxy resins.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.380 Xylene-formaldehyde resins...

2013-04-01

366

21 CFR 175.380 - Xylene-formaldehyde resins condensed with 4,4?-isopropylidenediphenol-epichlorohydrin epoxy resins.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.380 Xylene-formaldehyde resins...

2012-04-01

367

21 CFR 175.380 - Xylene-formaldehyde resins condensed with 4,4?-isopropylidenediphenol-epichlorohydrin epoxy resins.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.380 Xylene-formaldehyde resins...

2011-04-01

368

21 CFR 175.380 - Xylene-formaldehyde resins condensed with 4,4?-isopropylidenediphenol-epichlorohydrin epoxy resins.  

Code of Federal Regulations, 2014 CFR

...and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.380 Xylene-formaldehyde resins...

2014-04-01

369

21 CFR 175.380 - Xylene-formaldehyde resins condensed with 4,4?-isopropylidenediphenol-epichlorohydrin epoxy resins.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.380 Xylene-formaldehyde resins...

2010-04-01

370

33 CFR 207.175a - Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and...  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration... NAVIGATION REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use,...

2012-07-01

371

33 CFR 207.175a - Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and...  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration... NAVIGATION REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use,...

2014-07-01

372

33 CFR 207.175a - Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and...  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration... NAVIGATION REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use,...

2011-07-01

373

33 CFR 207.175a - Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and...  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration... NAVIGATION REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use,...

2010-07-01

374

33 CFR 207.175a - Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and...  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration... NAVIGATION REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use,...

2013-07-01

375

Evaluation of HYLIFE-II and Sombrero using 175- and 566-group neutron transport and activation cross sections  

Microsoft Academic Search

Recent modifications to the TART Monte Carlo neutron and photon transport code allow enable calculation of 566-group neutron spectra. This expanded group structure represents a significant improvement over the 50- and 175-group structures that have been previously available. To support use of this new capability, neutron activation cross-section libraries have been created in the 175- and 566-group structures starting from

Jeffery F Latkowski; Dermott E Cullen; Javier Sanz

2000-01-01

376

UltraFlex-175 Solar Array Technology Maturation Achievements for NASA's New Millennium Program (NMP) Space Technology 8 (ST8)  

Microsoft Academic Search

ATK space systems (ATK) in collaboration with the NASA Glenn Research Center (GRC), the Jet Propulsion Laboratory (JPL), and EMCORE Photovoltaics (EPV), is executing NASA's New Millennium Program (NMP) Space Technology 8 (ST8) Project Formulation Refinement Phase to develop and validate through spaceflight a state-of-the-art solar array system called UltraFlex-175. UltraFlex-175 is a highly evolved and scaled version of the

B. Spence; S. White; A. Jones; J. Wachholz; N. Wilder; P. Cronin; T. Gregory; P. Barker; T. Allmandinger; N. Mardesich; M. Piszczor; P. Sharps; N. Fatemi

2006-01-01

377

Broadband generation by multiple four-wave mixing process due to ASE Q-switching in high-power double-clad ytterbium-doped fiber amplifier  

NASA Astrophysics Data System (ADS)

Broadband output from 1060nm to 1700nm and cascaded four-wave mixing generated red light pulsing is observed in a fiber amplifier set up consisting of a 5.5m double clad, double D shaped Ytterbium doped fiber, a single clad passive fiber for excess pump absorption and a splitter, both with and without a CW seed. Self-pulsing occurs from ASE due to passive Q-switching by saturable absorption effect of the active fiber and also depends on splice loss. The pulses generate broadband output by multiple four-wave mixing process with maximum broadening efficiency near 1300nm which is the zero dispersion wavelength for silica fiber. Pulses traveling both in forward and backward direction have enough peak power and energy to damage splice points and fiber components. When seeded the self-pulsing and broadband generation is often suppressed but again generate at increased pump powers.

Chowdhury, Sourav D.; Shekhar, Nishant; Saha, Maitreyee; Sen, Ranjan; Pal, Mrinmay

2014-11-01

378

Soliton rains in a graphene-oxide passively mode-locked ytterbium-doped fiber laser with all-normal dispersion  

NASA Astrophysics Data System (ADS)

We experimentally investigated soliton rains in an ytterbium-doped fiber (YDF) laser with a net normal dispersion cavity using a graphene-oxide (GO) saturable absorber (SA). The 195 m-long-cavity, the fiber birefringence filter and the inserted 2.5 nm narrow bandwidth filter play important roles in the formation of the soliton rains. The soliton rain states can be changed by the effective gain bandwidth of the laser. The experimental results can be conducive to an understanding of dissipative soliton features and mode-locking dynamics in all-normal dispersion fiber lasers with GOSAs. To the best of our knowledge, this is the first demonstration of soliton rains in a GOSA passively mode-locked YDF laser with a net normal dispersion cavity.

Huang, S. S.; Wang, Y. G.; Yan, P. G.; Zhang, G. L.; Zhao, J. Q.; Li, H. Q.; Lin, R. Y.

2014-02-01

379

Three-sublattice analyses on magnetic and magneto-optical properties of scandium substituted ytterbium iron garnet in high magnetic fields  

NASA Astrophysics Data System (ADS)

A three-sublattice model is applied to study the magnetic properties of scandium substituted ytterbium iron garnet (Sc-YbIG). The magnetic moments in three magnetic sublattices (a, c and d sites) in Sc-YbIG are analyzed, where the diamagnetic Sc3+ ions substitute for octahedral Fe3+ ions. The parameters ?i (i=a, c, d), associated with the exchange field and the magnetic susceptibility, are introduced. Here, ?i show obvious high magnetic field-dependent and temperature-dependent properties. Based on the thought of three magnetic sublattices, the magneto-optical properties in Sc-YbIG, as magnetic field applied along [1 0 0], [1 1 0] and [1 1 1] directions, at low temperatures are studied by an improved magneto-optical four-level model, where the physical mechanism of magneto-optical anisotropy is explored in low magnetic fields. Our theory is in good agreement with the experimental results.

Wang, Wei; Zhao, Xiruo; Lahoubi, Mahieddine; Ping Liu, J.

2015-01-01

380

The SUPERFAMILY 1.75 database in 2014: a doubling of data.  

PubMed

We present updates to the SUPERFAMILY 1.75 (http://supfam.org) online resource and protein sequence collection. The hidden Markov model library that provides sequence homology to SCOP structural domains remains unchanged at version 1.75. In the last 4 years SUPERFAMILY has more than doubled its holding of curated complete proteomes over all cellular life, from 1400 proteomes reported previously in 2010 up to 3258 at present. Outside of the main sequence collection, SUPERFAMILY continues to provide domain annotation for sequences provided by other resources such as: UniProt, Ensembl, PDB, much of JGI Phytozome and selected subcollections of NCBI RefSeq. Despite this growth in data volume, SUPERFAMILY now provides users with an expanded and daily updated phylogenetic tree of life (sTOL). This tree is built with genomic-scale domain annotation data as before, but constantly updated when new species are introduced to the sequence library. Our Gene Ontology and other functional and phenotypic annotations previously reported have stood up to critical assessment by the function prediction community. We have now introduced these data in an integrated manner online at the level of an individual sequence, and-in the case of whole genomes-with enrichment analysis against a taxonomically defined background. PMID:25414345

Oates, Matt E; Stahlhacke, Jonathan; Vavoulis, Dimitrios V; Smithers, Ben; Rackham, Owen J L; Sardar, Adam J; Zaucha, Jan; Thurlby, Natalie; Fang, Hai; Gough, Julian

2015-01-28

381

Investigation of drum pressurization incident in the 331 Building, Room 175 on January 10, 1995  

SciTech Connect

On January 10, 1995, a pressurized drum incident occurred at the 331 Building, Room 175. On January 12, 1995, the Manager of the Life Sciences Center appointed members to an Investigation Board to investigate the incident (see Exhibit A). This incident was initially categorized as an Off-Normal Occurrence, but was later elevated to an Unusual Occurrence by the Occurrence Classifier. The scope of this investigation was to employ a formal method of root cause analysis, identify the methodology, and report the results of the analysis, fully explaining the technical elements of the causal sequence along with a description of the barriers that should have or could have prevented the occurrence. During the course of the investigation, the scene of the event was not accessible. Therefore, the investigation relied primarily on testimony from staff members directly involved and their management. In addition, other outside professionals were also consulted. The Investigation Board visited the previous location of the drum, 331A Building, Room 9; Room 173, which fronts room 175, was also visited. The Investigation Board reviewed selected documents, which are also listed.

Pollari, R.A.

1995-02-01

382

Critical Glycosylated Residues in Exon Three of Erythrocyte Glycophorin A Engage Plasmodium falciparum EBA-175 and Define Receptor Specificity  

PubMed Central

ABSTRACT Erythrocyte invasion is an essential step in the pathogenesis of malaria. The erythrocyte binding-like (EBL) family of Plasmodium falciparum proteins recognizes glycophorins (Gp) on erythrocytes and plays a critical role in attachment during invasion. However, the molecular basis for specific receptor recognition by each parasite ligand has remained elusive, as is the case with the ligand/receptor pair P. falciparum EBA-175 (PfEBA-175)/GpA. This is due largely to difficulties in producing properly glycosylated and functional receptors. Here, we developed an expression system to produce recombinant glycosylated and functional GpA, as well as mutations and truncations. We identified the essential binding region and determinants for PfEBA-175 engagement, demonstrated that these determinants are required for the inhibition of parasite growth, and identified the glycans important in mediating the PfEBA-175–GpA interaction. The results suggest that PfEBA-175 engages multiple glycans of GpA encoded by exon 3 and that the presentation of glycans is likely required for high-avidity binding. The absence of exon 3 in GpB and GpE due to a splice site mutation confers specific recognition of GpA by PfEBA-175. We speculate that GpB and GpE may have arisen due to selective pressure to lose the PfEBA-175 binding site in GpA. The expression system described here has wider application for examining other EBL members important in parasite invasion, as well as additional pathogens that recognize glycophorins. The ability to define critical binding determinants in receptor-ligand interactions, as well as a system to genetically manipulate glycosylated receptors, opens new avenues for the design of interventions that disrupt parasite invasion. PMID:25205096

Salinas, Nichole D.; Paing, May M.

2014-01-01

383

Structural and Functional Basis for Inhibition of Erythrocyte Invasion by Antibodies that Target Plasmodium falciparum EBA-175  

PubMed Central

Disrupting erythrocyte invasion by Plasmodium falciparum is an attractive approach to combat malaria. P. falciparum EBA-175 (PfEBA-175) engages the host receptor Glycophorin A (GpA) during invasion and is a leading vaccine candidate. Antibodies that recognize PfEBA-175 can prevent parasite growth, although not all antibodies are inhibitory. Here, using x-ray crystallography, small-angle x-ray scattering and functional studies, we report the structural basis and mechanism for inhibition by two PfEBA-175 antibodies. Structures of each antibody in complex with the PfEBA-175 receptor binding domain reveal that the most potent inhibitory antibody, R217, engages critical GpA binding residues and the proposed dimer interface of PfEBA-175. A second weakly inhibitory antibody, R218, binds to an asparagine-rich surface loop. We show that the epitopes identified by structural studies are critical for antibody binding. Together, the structural and mapping studies reveal distinct mechanisms of action, with R217 directly preventing receptor binding while R218 allows for receptor binding. Using a direct receptor binding assay we show R217 directly blocks GpA engagement while R218 does not. Our studies elaborate on the complex interaction between PfEBA-175 and GpA and highlight new approaches to targeting the molecular mechanism of P. falciparum invasion of erythrocytes. The results suggest studies aiming to improve the efficacy of blood-stage vaccines, either by selecting single or combining multiple parasite antigens, should assess the antibody response to defined inhibitory epitopes as well as the response to the whole protein antigen. Finally, this work demonstrates the importance of identifying inhibitory-epitopes and avoiding decoy-epitopes in antibody-based therapies, vaccines and diagnostics. PMID:23717209

Chen, Edwin; Paing, May M.; Salinas, Nichole; Sim, B. Kim Lee; Tolia, Niraj H.

2013-01-01

384

(CaxNd11-x)Ru4O24 (x = 4.175)  

PubMed Central

Single crystals of the title compound, calcium neodymium ruthenate, (CaxNd11-x)Ru4O24 (x = 4.175), have been grown by the flux method. The structure consists of two crystallographically independent RuO6 octa­hedra, which are isolated from each other and embedded in a matrix composed of the Ca and Nd atoms. There are seven M sites which accommodate the Ca and Nd atoms with different populations. Four M sites at general positions are enriched with Nd, whereas the remaining three M sites on twofold rotation axes are enriched with Ca. The coordination numbers of O atoms to the M sites range from 6 to 9. The mean oxidation state of Ru was estimated at +4.79 from the composition analysis. The title compound is non-centrosymmetric and potentially multiferroic. PMID:21589203

Sakakura, Terutoshi; Okada, Keita; Iguchi, Hironaga; Wang, Jun; Ishizawa, Nobuo

2010-01-01

385

175Yb-TTHMP as a good candidate for bone pain palliation and substitute of other radiopharmaceuticals  

PubMed Central

Bone metastasis is one of the most frequent causes of pain in cancer patients. Different radioisotopes such as P-32, Sm-153, Ho-166, Lu-177, and Re-186 with several chemical ligands as ethylenediaminetetramethylene phosphonic acid (EDTMP), 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetramethylene phosphonic acid (DOTMP), and propylenediaminetetramethylene phosphonate (PDTMP) are recommended for bone pain palliation. In this work, 175Yb-triethylenetetraminehexamethylene phosphonic acid (TTHMP) was produced as a proper alternative to other radiopharmaceuticals. Relatively long half-life (T1/2 = 4.18 days), maximum energy beta particle E? =470 keV (86.5%), low abundance gamma emission 396 keV (6.4%), 286 keV (3.01%), 113.8 keV (1.88%) and low cost are considered advantageous of Yb-175 are to wider usage of this isotope; in addition, TTHMP is an ideal carrier moiety for bone metastases. Production, quality control, and biodistribution studies of 175Yb-TTHMP were targeted. Yb-175 chloride was obtained by thermal neutron bombardment of a natural Yb2O3 sample at Tehran Research Reactor (TRR), radiolabeling was completed in 1 h by the addition of TTHMP at the room temperature and pH was 7.5-8, radiochemical purity was higher than 95%. Biodistribution studies in normal rats were carried out. The results showed favorable biodistribution features of 175Yb-TTHMP, indicating significant accumulation in bone tissues compared with clinically used bone-seeking radiopharmaceuticals. This research presents 175Yb-TTHMP can be a good candidate for bone pain palliation and substitute of other radiopharmaceuticals, however, further biological studies in other mammals are still needed. PMID:25210277

Safarzadeh, Laleh

2014-01-01

386

LT175 is a novel PPAR?/? ligand with potent insulin-sensitizing effects and reduced adipogenic properties.  

PubMed

Peroxisome proliferator-activated receptors (PPARs) are ligand-dependent transcription factors regulating lipid and glucose metabolism. Ongoing drug discovery programs aim to develop dual PPAR?/? agonists devoid of the side effects of the marketed antidiabetic agents thiazolidinediones and the dual agonists glitazars. Recently, we described a new dual PPAR?/? ligand, LT175, with a partial agonist profile against PPAR? and interacting with a newly identified region of the PPAR?-ligand binding domain (1). Here we show that LT175 differentially activated PPAR? target genes involved in fatty acid esterification and storage in 3T3-L1-derived adipocytes. This resulted in a less severe lipid accumulation compared with that triggered by rosiglitazone, suggesting that LT175 may have a lower adipogenic activity. Consistent with this hypothesis, in vivo administration of LT175 to mice fed a high-fat diet decreased body weight, adipocyte size, and white adipose tissue mass, as assessed by magnetic resonance imaging. Furthermore, LT175 significantly reduced plasma glucose, insulin, non-esterified fatty acids, triglycerides, and cholesterol and increased circulating adiponectin and fibroblast growth factor 21 levels. Oral glucose and insulin tolerance tests showed that the compound improves glucose homeostasis and insulin sensitivity. Moreover, we demonstrate that the peculiar interaction of LT175 with PPAR? affected the recruitment of the coregulators cyclic-AMP response element-binding protein-binding protein and nuclear corepressor 1 (NCoR1), fundamentals for the PPAR?-mediated adipogenic program. In conclusion, our results describe a new PPAR ligand, modulating lipid and glucose metabolism with reduced adipogenic activity, that may be used as a model for a series of novel molecules with an improved pharmacological profile for the treatment of dyslipidemia and type 2 diabetes. PMID:24451380

Gilardi, Federica; Giudici, Marco; Mitro, Nico; Maschi, Omar; Guerrini, Uliano; Rando, Gianpaolo; Maggi, Adriana; Cermenati, Gaia; Laghezza, Antonio; Loiodice, Fulvio; Pochetti, Giorgio; Lavecchia, Antonio; Caruso, Donatella; De Fabiani, Emma; Bamberg, Krister; Crestani, Maurizio

2014-03-01

387

Crystal Structure of Carboxypeptidase A Complexed with D-Cysteine at 1.75 -Inhibitor-Induced Conformational Changes,  

E-print Network

Crystal Structure of Carboxypeptidase A Complexed with D-Cysteine at 1.75 Ã? - Inhibitor the structural basis for this difference, we solved the crystal structure of carboxypeptidase A complexed with D-cysteine 26, 2000 ABSTRACT: D-Cysteine differs from the antiarthritis drug D-penicillamine by only two methyl

Joshua-Tor, Leemor

388

41 CFR 102-37.175 - How does a SASP find out what property is potentially available for donation?  

Code of Federal Regulations, 2011 CFR

...3 2011-01-01 2011-01-01 false How does a SASP find out what property is potentially available for donation? 102-37...and Requesting Property § 102-37.175 How does a SASP find out what property is potentially available for donation?...

2011-01-01

389

41 CFR 102-37.175 - How does a SASP find out what property is potentially available for donation?  

Code of Federal Regulations, 2010 CFR

...3 2010-07-01 2010-07-01 false How does a SASP find out what property is potentially available for donation? 102-37...and Requesting Property § 102-37.175 How does a SASP find out what property is potentially available for donation?...

2010-07-01

390

41 CFR 102-37.175 - How does a SASP find out what property is potentially available for donation?  

Code of Federal Regulations, 2012 CFR

...3 2012-01-01 2012-01-01 false How does a SASP find out what property is potentially available for donation? 102-37...and Requesting Property § 102-37.175 How does a SASP find out what property is potentially available for donation?...

2012-01-01

391

41 CFR 102-37.175 - How does a SASP find out what property is potentially available for donation?  

Code of Federal Regulations, 2014 CFR

...3 2014-01-01 2014-01-01 false How does a SASP find out what property is potentially available for donation? 102-37...and Requesting Property § 102-37.175 How does a SASP find out what property is potentially available for donation?...

2014-01-01

392

41 CFR 102-37.175 - How does a SASP find out what property is potentially available for donation?  

Code of Federal Regulations, 2013 CFR

...3 2013-07-01 2013-07-01 false How does a SASP find out what property is potentially available for donation? 102-37...and Requesting Property § 102-37.175 How does a SASP find out what property is potentially available for donation?...

2013-07-01

393

J. Phys. I France 6 (1996) 167-175 JANUARY 1996, PAGE 167 Stock Market Crashes, Precursors and Replicas  

E-print Network

J. Phys. I France 6 (1996) 167-175 JANUARY 1996, PAGE 167 Stock Market Crashes, Precursors correlations of returns across countries and tue fact tuat stock markets around tue world are amazingly diverse year and even before. In tue Ã?S market for instance, stock prices advanced 31.4% over tuose nine montus

Paris-Sud XI, Université de

394

A Beamforming Study for Implementation of Vibro-acoustography with a 1.75D Array Transducer  

PubMed Central

Vibro-acoustography (VA) is an ultrasound-based imaging modality that uses radiation force produced by two cofocused ultrasound beams separated by a small frequency difference, ?f, to vibrate tissue at ?f. An acoustic field is created by the object vibration and measured with a nearby hydrophone. This method has recently been implemented on a clinical ultrasound system using one-dimensional (1D) linear array transducers. In this article, we discuss VA beamforming and image formation using a 1.75D array transducer. A 1.75D array transducer has several rows of elements in the elevation direction which can be controlled independently for focusing. The advantage of the 1.75D array over a 1D linear array transducer is that multiple rows of elements can be used for improving elevation focus for imaging formation. Six configurations for subaperture design for the two ultrasound beams necessary for VA imaging were analyzed. The point-spread functions for these different configurations were evaluated using a numerical simulation model. Four of these configurations were then chosen for experimental evaluation with a needle hydrophone as well as for scanning two phantoms. Images were formed by scanning a urethane breast phantom and an ex vivo human prostate. VA imaging using a 1.75D array transducer offers several advantages over scanning with a linear array transducer including improved image resolution and contrast due to better elevation focusing of the imaging point-spread function. PMID:23475919

Urban, Matthew W.; Chalek, Carl; Haider, Bruno; Thomenius, Kai E.; Fatemi, Mostafa; Alizad, Azra

2013-01-01

395

Semi-inclusive ? and KS Production in pAu Collisions at 17.5 GeV\\/c  

Microsoft Academic Search

The first detailed measurements of the centrality dependence of strangeness production in p-A collisions are presented. ? and KS dn\\/dy distributions from 17.5 GeV\\/c p-Au collisions are shown as a function of \\

I. Chemakin; V. Cianciolo; B. A. Cole; R. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. Kirk; N. Maeda; R. L. McGrath; S. Mioduszewski; D. Morrison; M. Moulson; M. N. Namboodiri; G. Rai; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; S. Sorensen; J. H. Thomas; Y. Torun; D. Winter; X. Yang; W. A. Zajc; Y. Zhang; Y. Zhang

2000-01-01

396

ELSEVIER Earth-Science Reviews 41 (1996) 117-175 A review of tufa and travertine deposits of the world  

E-print Network

ELSEVIER Earth-Science Reviews 41 (1996) 117-175 A review of tufa and travertine deposits, UK b School of Geography and Earth Resources, University of Hull, Hull, HU6 7RX, UK Received 5 material. While the majority of tufa deposits are of post-glacial age some of the most spectacular

Parker, Gary

397

58. R. J. Alfidi et al., Radiology 143, 175 (1982); C. B. Higgins, R. Herfkens, M. J. Lipton, R. P.  

E-print Network

58. R. J. Alfidi et al., Radiology 143, 175 (1982); C. B. Higgins, R. Herfkens, M. J. Lipton, R. P. Sievers, P. Sheldon, L. Kaufman, Am. J. Car- diol. 52, 184 (1983); P. Lanzer et al., Radiology 150, 121 (1984). 59. E. S. Williams et al., J. Nucl. Med. 21, 449 (1980); T. J. Brady et al., Radiology 144, 343

Zare, Richard N.

398

doi: 10.1130/0091-7613(2002)0302.0.CO;2 2002;30;175-178Geology  

E-print Network

Geology doi: 10.1130/0091-7613(2002)0302.0.CO;2 2002;30;175-178Geology Sean D. Willett not claimed on content prepared wholly by U.S. government employees within scope of Notes Geological Society of America on June 9, 2014geology.gsapubs.orgDownloaded from on June 9, 2014geology

399

Delineation of Stage Specific Expression of Plasmodium falciparum EBA-175 by Biologically Functional Region II Monoclonal Antibodies  

PubMed Central

Background The malaria parasite Plasmodium falciparum EBA-175 binds its receptor sialic acids on glycophorin A when invading erythrocytes. The receptor-binding region (RII) contains two cysteine-rich domains with similar cysteine motifs (F1 and F2). Functional relationships between F1 and F2 domains and characterization of EBA-175 were studied using specific monoclonal antibodies (mAbs) against these domains. Methods and Findings Five mAbs specific for F1 or F2 were generated. Three mAbs specific for F2 potently blocked binding of EBA-175 to erythrocytes, and merozoite invasion of erythrocytes (IC50 10 to 100 µg/ml IgG in growth inhibition assays). A mAb specific for F1 blocked EBA-175 binding and merozoite invasion less effectively. The difference observed between the IC50 of F1 and F2 mAbs was not due to differing association and disassociation rates as determined by surface plasmon resonance. Four of the mAbs recognized conformation-dependent epitopes within F1 or F2. Used in combination, F1 and F2 mAbs blocked the binding of native EBA-175 to erythrocytes and inhibited parasite invasion synergistically in vitro. MAb R217, the most potent, did not recognize sporozoites, 3-day hepatocyte stage parasites, nor rings, trophozoites, gametocytes, retorts, ookinetes, and oocysts but recognized 6-day hepatocyte stage parasites, and schizonts. Even though efficient at blocking binding to erythrocytes and inhibiting invasion into erythrocytes, MAb R217 did not inhibit sporozoite invasion and development in hepatocytes in vitro. Conclusions The role of the F1 and F2 domains in erythrocyte invasion and binding was elucidated with mAbs. These mAbs interfere with native EBA-175 binding to erythrocyte in a synergistic fashion. The stage specific expression of EBA-175 showed that the primary focus of activity was the merozoite stage. A recombinant RII protein vaccine consisting of both F1 and F2 domains that could induce synergistic activity should be optimal for induction of antibody responses that interfere with merozoite invasion of erythrocytes. PMID:21533224

Chattopadhyay, Rana; Ahumada, Adriana; Haynes, J. David; Fuhrmann, Steven R.; Wingard, Jennifer N.; Liang, Hong; Moch, J. Kathleen; Hoffman, Stephen L.

2011-01-01

400

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 41, NO. 8, AUGUST 2006 1749 A Wideband 77-GHz, 17.5-dBm Fully Integrated  

E-print Network

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 41, NO. 8, AUGUST 2006 1749 A Wideband 77-GHz, 17.5-dBm Fully Integrated Power Amplifier in Silicon Abbas Komijani, Student Member, IEEE, and Ali Hajimiri, Member, IEEE Abstract--A 77-GHz, +17.5 dBm power amplifier (PA) with fully integrated 50- input

Hajimiri, Ali

401

CW 1.06-?m pumped ytterbium-holmium co-doped all-fiber laser for 2.05 ?m  

NASA Astrophysics Data System (ADS)

An Ytterbium-Holmium co-doped all-fiber CW laser is reported. The fiber used in the laser setup has been fabricated through the conventional MCVD process in conjunction with the SD technique and finally drawn using a standard fiberdraw tower. The laser was built in a linear Fabry-Perot configuration in which two fiber Bragg gratings reflecting at 2.05 ?m were used as the cavity couplers. Under 1.06-?m in-core pumping of the fiber, CW lasing at 2.05 ?m was provided due to energy transfer Yb3+?Ho3+. The laser demonstrated low threshold (~0.8 W), moderate slope efficiency of lasing (~8.4% when measured vs. pump power launched into the active fiber), and high stability: during 6 hours its output power fluctuated within a 3% range. The laser spectrum width at a 3-dB level using an optical spectrum analyzer with a 37-pm resolution was measured to be ~70 pm.

Kir'yanov, Alexander V.; Barmenkov, Yuri O.; Minkovich, Vladimir P.

2014-08-01

402

High-efficiency ytterbium-free erbium-doped all-glass double cladding silicate glass fiber for resonantly-pumped fiber lasers.  

PubMed

A highly efficient ytterbium-free erbium-doped silicate glass fiber has been developed for high-power fiber laser applications at an eye-safe wavelength near 1.55 ?m. Our preliminary experiments show that high laser efficiency can be obtained from a relatively short length of the gain fiber when resonantly pumped at 1535 nm in both core- and cladding-pumping configurations. With a core-pumping configuration as high as 75%, optical-to-optical efficiency and 4 W output power were obtained at 1560 nm from a 1 m long gain fiber. When using a cladding-pumping configuration, approximately 13 W output power with 67.7% slope efficiency was demonstrated from a piece of 2 m long fiber. The lengths of silicate-based gain fiber are much shorter than their silica-based counterparts used in other experiments, which is significantly important for high-power narrow-band and/or pulsed laser applications. PMID:24514181

Qiang, Zexuan; Geng, Jihong; Luo, Tao; Zhang, Jun; Jiang, Shibin

2014-02-01

403

Ytterbium-doped fiber laser passively mode locked by few-layer Molybdenum Disulfide (MoS2) saturable absorber functioned with evanescent field interaction.  

PubMed

By coupling few-layer Molybdenum Disulfide (MoS2) with fiber-taper evanescent light field, a new type of MoS2 based nonlinear optical modulating element had been successfully fabricated as a two-dimensional layered saturable absorber with strong light-matter interaction. This MoS2-taper-fiber device is not only capable of passively mode-locking an all-normal-dispersion ytterbium-doped fiber laser and enduring high power laser excitation (up to 1 W), but also functions as a polarization sensitive optical modulating component (that is, different polarized light can induce different nonlinear optical response). Thanks to the combined advantages from the strong nonlinear optical response in MoS2 together with the sufficiently-long-range interaction between light and MoS2, this device allows for the generation of high power stable dissipative solitons at 1042.6 nm with pulse duration of 656 ps and a repetition rate of 6.74 MHz at a pump power of 210 mW. Our work may also constitute the first example of MoS2-enabled wave-guiding photonic device, and potential y give some new insights into two-dimensional layered materials related photonics. PMID:25213108

Du, Juan; Wang, Qingkai; Jiang, Guobao; Xu, Changwen; Zhao, Chujun; Xiang, Yuanjiang; Chen, Yu; Wen, Shuangchun; Zhang, Han

2014-01-01

404

175 GHz, 400-fs-pulse harmonically mode-locked surface emitting semiconductor laser.  

PubMed

We report a harmonically mode-locked vertical external cavity surface emitting laser (VECSEL) producing 400 fs pulses at a repetition frequency of 175 GHz with an average output power of 300 mW. Harmonic mode-locking was established using a 300 µm thick intracavity single crystal diamond heat spreader in thermal contact with the front surface of the gain sample using liquid capillary bonding. The repetition frequency was set by the diamond microcavity and stable harmonic mode locking was achieved when the laser cavity length was tuned so that the laser operated on the 117th harmonic of the fundamental cavity. When an etalon placed intracavity next to the gain sample, but not in thermal contact was used pulse groups were observed. These contained 300 fs pulses with a spacing of 5.9 ps. We conclude that to achieve stable harmonic mode locking at repetition frequencies in the 100s of GHz range in a VECSEL there is a threshold pulse energy above which harmonic mode locking is achieved and below which groups of pulses are observed. PMID:22453384

Wilcox, Keith G; Quarterman, Adrian H; Apostolopoulos, Vasilis; Beere, Harvey E; Farrer, Ian; Ritchie, David A; Tropper, Anne C

2012-03-26

405

Corrosion-Fatigue Behavior of Aluminum Alloy 5083-H131 Sensitized at 448 K (175 °C)  

NASA Astrophysics Data System (ADS)

The fatigue crack growth behavior of aluminum alloy 5083-H131 has been systematically studied as a function of degree of sensitization for aging at 448 K (175 °C). Fatigue crack growth rates were measured at load ratios of 0.1 and 0.85, in vacuum, air, and a corrosive aqueous environment containing 1 pct NaCl with dilute inhibitor. Sensitization does not affect the fatigue crack growth behavior of Al 5083-H131 significantly in vacuum or air, at low- or high-load ratio. For high-load ratio, in the 1 pct NaCl+inhibitor solution, the threshold drops by nearly 50 pct during the first 200 hours of aging, then it degrades more slowly for longer aging times up to 2000 hours. The change in aging behavior at approximately 200 hours seems to be correlated with the transition from partial coverage of the grain boundaries by ? Al3Mg2 phase, to continuous full ? coverage. ASTM G-67 mass loss levels below approximately 30 mg/cm2 do not exhibit degraded corrosion-fatigue properties for R = 0.85, but degradation of the threshold is rapid for higher mass loss levels.

Holtz, Ronald L.; Pao, Peter S.; Bayles, Robert A.; Longazel, Thomas M.; Goswami, Ramasis

2012-08-01

406

The peculiar binding properties of 4'-deoxy,4'-iododoxorubicin to isolated DNA and 175 bp nucleosomes.  

PubMed Central

The thermodynamic parameters governing the interaction of 4'-deoxy,4'-iododoxorubicin (4'-IAM) to double stranded DNA or 175 bp nucleosomes have been evaluated at different ionic strength and temperature conditions by means of fluorescence techniques. The iodo-anthracycline exhibits quite different characteristics from the parent compounds adriamycin (AM) and daunomycin (DM) and other second generation derivatives. In fact, the contribution of electrostatic interactions to the total free energy of binding is rather poor and the changes in enthalpy, usually high and negative, are low and eventually positive. Unlike other members of its family, 4'-IAM exhibits preference for the nucleosomal structure. In addition, its binding to isolated DNA is remarkably cooperative. Circular dichroism studies show changes in the geometry of the intercalation complex when the drug binds to nucleosomes. The possibility for the iodo-sugar moiety to act as an alkylating or free-radical producing species was also considered as an alternative mechanism of action. However, no evidence was obtained to support these hypotheses. Thus the major differences observed in DNA-binding in comparison to parent anthracyclines appear to be mostly related to the lower pKa and higher lipophilicity exhibited by 4'-IAM. PMID:1945847

Cera, C; Palumbo, M

1991-01-01

407

The flexibility of two tropomyosin mutants, D175N and E180G, that cause hypertrophic cardiomyopathy  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Well-known tropomyosin mutants, D175N and E180G are linked to cardiomyopathies. Black-Right-Pointing-Pointer The structural mechanics of D175N and E180G tropomyosins have been investigated. Black-Right-Pointing-Pointer D175N and E180G mutations increase both local and global tropomyosin flexibility. Black-Right-Pointing-Pointer In muscle, this increased flexibility will enhance myosin interactions on actin. Black-Right-Pointing-Pointer Extra myosin interaction can alter cardiac Ca{sup 2+}-switching, leading to dysfunction. -- Abstract: Point mutations targeting muscle thin filament proteins are the cause of a number of cardiomyopathies. In many cases, biological effects of the mutations are well-documented, whereas their structural and mechanical impact on filament assembly and regulatory function is lacking. In order to elucidate molecular defects leading to cardiac dysfunction, we have examined the structural mechanics of two tropomyosin mutants, E180G and D175N, which are associated with hypertrophic cardiomyopathy (HCM). Tropomyosin is an {alpha}-helical coiled-coil dimer which polymerizes end-to-end to create an elongated superhelix that wraps around F-actin filaments of muscle and non-muscle cells, thus modulating the binding of other actin-binding proteins. Here, we study how flexibility changes in the E180G and D175N mutants might affect tropomyosin binding and regulatory motion on F-actin. Electron microscopy and Molecular Dynamics simulations show that E180G and D175N mutations cause an increase in bending flexibility of tropomyosin both locally and globally. This excess flexibility is likely to increase accessibility of the myosin-binding sites on F-actin, thus destabilizing the low-Ca{sup 2+} relaxed-state of cardiac muscle. The resulting imbalance in the on-off switching mechanism of the mutants will shift the regulatory equilibrium towards Ca{sup 2+}-activation of cardiac muscle, as is observed in affected muscle, accompanied by enhanced systolic activity, diastolic dysfunction, and cardiac compensations associated with HCM and heart failure.

Li, Xiaochuan; Suphamungmee, Worawit [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)] [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States); Janco, Miro; Geeves, Michael A. [School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ (United Kingdom)] [School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ (United Kingdom); Marston, Steven B. [National Heart and Lung Institute, Imperial College London, London W12 0NN (United Kingdom)] [National Heart and Lung Institute, Imperial College London, London W12 0NN (United Kingdom); Fischer, Stefan, E-mail: stefan.fischer@iwr.uni-heidelberg.de [Computational Biochemistry Group, University of Heidelberg, Heidelberg D-69120 (Germany)] [Computational Biochemistry Group, University of Heidelberg, Heidelberg D-69120 (Germany); Lehman, William, E-mail: wlehman@bu.edu [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)] [Department of Physiology and Biophysics, Boston University School of Medicine, Boston, MA 02118 (United States)

2012-08-03

408

Spectra, temporal structure, and angular directivity of laser radiation of a Yb:YAG crystal and ytterbium glass pumped by low-coherence radiation from a F{sub 2}{sup +}:LiF colour centre laser  

SciTech Connect

By focusing radiation from a F{sub 2}{sup +}:LiF colour centre laser (emitting in the range from 0.89 to 0.95 {mu}m) on plates of a Yb:YAG crystal with the 20% concentration of Yb and of ytterbium glass with the 10% concentration of Yb, we observed nanosecond radiation pulses of Yb{sup 3+} ions in the spectral region from 1.00 to 1.06 {mu}m with the spectral width up to 20 nm in Yb:YAG and up to 50 nm in the ytterbium glass. Lasing appeared in the active medium in the region of excitation of the SBS of pump radiation with a diameter less than 200 {mu}m. The angular divergence of the broadband laser radiation (10{sup -3}-10{sup -4} rad) was one-two orders of magnitude smaller than the diffraction limit. The mechanism of generation of short broadband high-directional laser pulses in the spatial structure of thin layers with inversion produced in the region of propagation of an intense acoustic wave in the medium is discussed. The interpretation of experimental data on the angular divergence of radiation is based on a new concept of the spatial distribution of the electromagnetic field of a photon not in the form of a travelling wave but with the field structures located in fixed positions along the propagation direction. The features of the temporal picture and narrowband lasing spectra of Yb:YAG and ytterbium glass in a resonator upon relaxation of the SBS excitation region in the active medium are considered. The possibility of diagnostics of medium parameters using the shift of spectra of the lasing at the resonator modes in different sites of the SBS excitation region is discussed. (active media. lasers)

Bykovskii, N E; Senatsky, Yu V [P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2008-09-30

409

Improved sample-holder design for specific-heat measurements in magnetic fields up to 17.5 T  

Microsoft Academic Search

By the use of a gold-plated silver sample holder, and a RuO2-Cernox combination thermometer, low-temperature specific-heat measurements in the temperature range from 0.35 to 90 K, and in magnetic fields up to 17.5 T, have become possible with remarkably improved accuracy. At 500 mK, the lower limit for the heat capacity that can be measured amounts to 0.02 mJ\\/K. The

J. C. P. Klaasse; I. H. Hagmusa

1997-01-01

410

Evaluating HapMap SNP data transferability in a large-scale genotyping project involving 175 cancer-associated genes  

Microsoft Academic Search

One of the many potential uses of the HapMap project is its application to the investigation of complex disease aetiology\\u000a among a wide range of populations. This study aims to assess the transferability of HapMap SNP data to the Spanish population\\u000a in the context of cancer research. We have carried out a genotyping study in Spanish subjects involving 175 candidate

Gloria Ribas; Anna González-Neira; Antonio Salas; Roger L. Milne; Ana Vega; Begoña Carracedo; Emilio González; Eva Barroso; Lara P. Fernández; Patricio Yankilevich; Mercedes Robledo; Ángel Carracedo; Javier Benítez

2006-01-01

411

Crystal Structure of Carboxypeptidase A Complexed with d Cysteine at 1.75 Å ? Inhibitor-Induced Conformational Changes † , ‡  

Microsoft Academic Search

D-Cysteine differs from the antiarthritis drug D-penicillamine by only two methyl groups on the ‚-carbon yet inhibits carboxypeptidase A (CPD) by a distinct mechanism: D-cysteine binds tightly to the active site zinc, while D-penicillamine catalyzes metal removal. To investigate the structural basis for this difference, we solved the crystal structure of carboxypeptidase A complexed with D-cysteine (D-Cys) at 1.75-Å resolution.D-Cys

Daan M. F. van Aalten; Curtis R. Chong; Leemor Joshua-Tor

2000-01-01

412

Size and taxonomic plankton community structure and carbon flow at the equator, 175‡E during 1990–1994  

Microsoft Academic Search

Size and taxonomic structure of plankton community carbon biomass for the 0.2–2000 ?m equivalent spherical diameter range were determined at the equator at 175°E in September 1990–1993 and April 1994. Total biomass of the plankton community ranged from 1944 to 3448 mg C m?2. Phytoplankton, zooplankton and bacteria carbon biomasses were 604–1669 mg C m-2, 300–797 mg C m2, and

J. Ishizaka; K. Harada; K. Ishikawa; H. Kiyosawa; H. Furusawa; Y. Watanabe; H. Ishida; K. Suzuki; N. Handa; M. Takahashi

1997-01-01

413

Semi-inclusive Lambda and KS Production in pAu Collisions at 17.5 GeV\\/c  

Microsoft Academic Search

The first detailed measurements of the centrality dependence of strangeness production in p-A collisions are presented. Lambda and KS dn\\/dy distributions from 17.5 GeV\\/ c p-Au collisions are shown as a function of ``grey'' track multiplicity and the estimated number of collisions, nu, made by the proton. The nu dependence of the Lambda yield deviates from a scaling of p-p

I. Chemakin; V. Cianciolo; B. A. Cole; R. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. Kirk; N. Maeda; R. L. McGrath; S. Mioduszewski; M. Moulson; M. N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; S. Sorensen; J. H. Thomas; Y. Torun; D. Winter; X. Yang; W. A. Zajc; Y. Zhang

2000-01-01

414

Antiproton production in p+A collisions at 12.3 and 17.5 GeV\\/c  

Microsoft Academic Search

Inclusive and semi-inclusive measurements are presented for antiproton (p¯) production in proton-nucleus collisions at the Alternating Gradient Synchrotron (AGS). The inclusive yields per event increase strongly with increasing beam energy and decrease slightly with increasing target mass. The p¯ yield in 17.5 GeV\\/c p+Au collisions decreases with grey track multiplicity, Ng, for Ng>0, consistent with annihilation within the target nucleus.

I. Chemakin; V. Cianciolo; B. A. Cole; R. Fernow; A. Frawley; M. Gilkes; S. Gushue; E. Hartouni; H. Hiejima; M. Justice; J. H. Kang; D. Keane; H. Kirk; M. Kreisler; N. Maeda; R. L. McGrath; S. Mioduszewski; D. Morrison; M. Moulson; N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. Soltz; S. Sorensen; J. Thomas; Y. Torun; D. Winter; X. Yang; W. A. Zajc; Y. Zhang

2001-01-01

415

Is the dialysate calcium concentration of 1.75 mmol/L suitable for Chinese patients on maintenance hemodialysis?  

PubMed

We studied the effects of increasing the dialysate calcium concentration (DCa) to 1.75 mmol/L on controlling chronic kidney disease-mineral and bone disorder in Chinese patients on maintenance hemodialysis (MHD). We reviewed the data of MHD patients in one center (cohort 1) during prior 10 years and analyzed the risk factors of mortality and transference calcification (TC) in120 MHD patients surviving in 2003 (cohort 2). A multicenter, prospective, parallel-group, controlled trial (cohort 3) was also conducted from January 2011 to December 2012. The DCa at one center was increased from 1.5 to 1.75 mmol/L but was not changed at the other two centers. The clinical outcomes, biochemical parameters, medicine treatments, and TC markers [aortic arch calcification score (AoACS)] were compared between groups. In cohort 1, the annual mean serum iPTH increased significantly over 10 years. In cohort 1, 72 patients survived for 10 years, whose doses of calcium salts and active vitamin D3 and AoACs increased progressively. In cohort 2, the main cause of death was cardiocerebrovascular disease (CCVD) (n = 18, 48.6 %). Male sex and lower serum calcium concentrations were independent risk factors for CCVD mortality. In cohort 3, serum phosphorus, iPTH, and 25(OH)D decreased and serum calcium increased significantly; also, the doses of calcium and vitamin D3 decreased from 2011 to 2012 in the DCa 1.75 group. There were no significant differences in clinical outcomes either between groups or between the two calendar years. Our results indicate that increasing DCa to 1.75 mmol/L can decrease the elevated levels of serum iPTH and phosphorus, reduce the doses of calcium and vitamin D3, and be safe for short periods of time. PMID:24193439

Zhang, Dong-liang; Wang, Li-yan; Sun, Fang; Zhou, Yi-lun; Duan, Xiao-feng; Liu, Sha; Sun, Yi; Cui, Tai-gen; Liu, Wen-hu

2014-03-01

416

Design and evaluation of a 63 element 1.75-dimensional ultrasound phased array for treating benign prostatic hyperplasia  

NASA Astrophysics Data System (ADS)

Focused ultrasound surgery (FUS) is a clinical method for treating benign prostatic hyperplasia (BPH) in which tissue is noninvasively necrosed by elevating the temperature at the focal point above 60°C using short sonications. With 1.75-dimensional (1.75-D) arrays, the power and phase to the individual elements can be controlled electronically for focusing and steering. This research describes the design, construction and evaluation of a 1.75-D ultrasound phased array to be used in the treatment of benign prostatic hyperplasia. The array was designed with a steering angle of +/-13.5 deg in the transverse direction, and can move the focus in three parallel planes in the longitudinal direction with a relatively large focus size. A piezoelectric ceramic (PZT-8) was used as the material of the transducer and two matching layers were built for maximum acoustic power transmission to tissue. To verify the capability of the transducer for focusing and steering, exposimetry was performed and the results correlated well with the calculated fields. In vivo experiments were performed to verify the capability of the transducer to ablate tissue using short sonications. [Work supported by the Whitaker Foundation and the Department of Defense Congressionally Directed Medical Prostate Cancer Research Program.

Saleh, Khaldon Y.; Smith, Nadine B.

2003-10-01

417

MiR-17-5p modulates osteoblastic differentiation and cell proliferation by targeting SMAD7 in non-traumatic osteonecrosis  

PubMed Central

MicroRNAs (miRNAs) have recently been recognized to have a role in human orthopedic disorders. The objective of our study was to explore the expression profile and biological function of miRNA-17-5p (miR-17-5p), which is well known to be related to cancer cell proliferation and invasion, in osteoblastic differentiation and in cell proliferation. The expression levels of miR-17-5p in the femoral head mesenchymal stem cells of 20 patients with non-traumatic osteonecrosis (ON) and 10 patients with osteoarthritis (OA) were examined by quantitative reverse transcription-PCR (qRT–PCR). Furthermore, the interaction between miR-17-5p and SMAD7 was observed. We found that in non-traumatic ON samples the level of mature miR-17-5p was significantly lower than that of OA samples (P=0.0002). By targeting SMAD7, miR-17-5p promoted nuclear translocation of ?-catenin, enhanced expression of COL1A1 and finally facilitated the proliferation and differentiation of HMSC-bm cells. We also demonstrated that restoring expression of SMAD7 in HMSC-bm cells partially reversed the function of miR-17-5p. Together, our data suggested a theory that dysfunction of a network containing miR-17-5p, SMAD7 and ?-catenin could contribute to ON pathogenesis. The present study prompts the potential clinical value of miR-17-5p in non-traumatic ON. PMID:25060766

Jia, Jie; Feng, Xiaobo; Xu, Weihua; Yang, Shuhua; Zhang, Qing; Liu, Xianzhe; Feng, Yong; Dai, Zhipeng

2014-01-01

418

Polyethylene glycol compared with ytterbium oxide as a total faecal output marker to predict organic matter intake of dairy ewes fed indoors or at pasture.  

PubMed

Several external markers can be used for estimating total faecal output in view of assessing ruminant intake at pasture. Among them, ytterbium (Yb) has been used for many years in various conditions. Polyethylene glycol (PEG) is a promising external marker because it can be rapidly determined using near-infrared spectroscopy (NIRS). The study consisted of 24 adult lactating dairy ewes over three periods (P1, P2 and P3), fed with three different diets: P1, total mixed ration (TMR); P2, Italian ryegrass (IRG); and P3, pasture. After an adaptation period, the ewes were administered a daily dose of ytterbium oxide (0.35 g/day) and PEG (20 g/day) for 2 weeks. During the last week, the daily organic matter intake (OMIOBS) was measured. Faecal samples were collected at milking time (0800 and 1600 h) to determine marker content, using only samples collected in the morning (PEGm) or by averaging samples (Yb, PEGma). Faecal marker content made it possible to assess total faecal output, either using the two recovery rates for PEG (0.98 or 0.87) or not. The OMIOBS was assessed on the basis of total faeces estimated with Yb (OMIYb) or PEG (OMIPEG), and the digestibility was calculated on the basis of feed analysis. With total TMR (P1), the OMIPEG, corrected with recovery rate (OMIPEGm98) or not corrected (OMIPEGm) was 2.40 kg/day and 2.50 kg/day, respectively, and was not different (P>0.05) from OMIOBS (2.51 kg/day), whereas OMIYb was lower (2.14 kg/day) (P<0.001). With IRG (P2), OMIPEGm98 (1.67 kg/day), OMIPEGm87 (1.51 kg/day) and OMIYb (1.59 kg/day) were not different (P>0.05) from OMIOBS (1.57 kg/day). With pasture (P3), the OMIPEGm (1.54 kg/day) and OMIPEGm98 (1.48 kg/day) were not different (P>0.05) from the OMI assessed from the biomass measurement (1.52 kg/day). The OMIYb (1.36 kg/day) was lower (P<0.05) but not different from OMIPEGm98 and OMIPEGm87. Spearman's rank correlation between OMIOBS and other OMIs (predicted with Yb or PEG P1 and P2) showed that it is possible to rank animals using PEG when there is a sufficiently wide range of OMIOBS (1.65 to 2.8 kg/day in P1) but not within a narrower range (1.47 to 1.72 kg/day in P2). In conclusion, the present study confirms that PEG is a valuable external faecal marker, easy to prepare (solution), administer and determine (NIRS). It can be used to assess intake with numerous animals at pasture, but only for groups, and not to quantitatively estimate individual OMI. PMID:24923355

Hassoun, P; Bastianelli, D; Autran, P; Bocquier, F

2014-09-01

419

Determination of soluble phosphates in water samples using ytterbium(III) and dynamic measurements of light scattering intensity at long wavelength.  

PubMed

A selective and fast method has been developed for the determination of phosphates by measuring the formation of ytterbium(III) phosphate through the variation of the light scattering intensity with time. The low solubility of this compound causes an efficient dispersion of the radiation at 490 nm, which is measured at 980 nm using the second-order grating effect. This approach minimizes potential background signals from the sample matrix. The initial rate of the system is automatically obtained in only 0.5s by stopped-flow mixing technique. The variable optimization study has been carried out using univariate and multivariate methods. The dynamic range of the calibration graph is 0.09-7.9 mmol L(-1) (Pearson's correlation coefficient=0.9999) and the detection limit is 0.03 mmol L(-1). The precision of the method, expressed as relative standard deviation, is 2.3%. The study of the potential interference of different inorganic anions showed that arsenate is the main interferent, although it is tolerated in a molar ratio of 5.5. The method has been satisfactorily applied to the determination of soluble phosphates in tap, ground and river water using a previous preconcentration step with a Dowex 1 (1 x 4-400) anionic resin. A 500-fold concentration has been achieved, which has allowed to decrease the detection limit up to 60 mmol L(-1). The recovery range is 97.5-102.5%. The results obtained are consistent with those obtained with the standard molybdenum blue method. PMID:18970693

Rodríguez-Díaz, Rafael Carlos; Aguilar-Caballos, M Paz; Rincón, Francisco; Gómez-Hens, Agustina

2006-07-15

420

Modulating the near-infrared luminescence of neodymium and ytterbium complexes with tridentate ligands based on benzoxazole-substituted 8-hydroxyquinolines.  

PubMed

An improved synthesis of 2-(2'-benzothiazole)- and 2-(2'-benzoxazole)-8-hydroxyquinoline ligands that combine a tridentate N,N,O-chelating unit for metal binding and extended chromophore for light harvesting is developed. The 2-(2'-benzoxazole)-8-hydroxyquinoline ligands form mononuclear nine-coordinate complexes with neodymium, [Nd(kappa(3)-ligand)(3)], and an eight-coordinate complex with ytterbium, [Yb(kappa(3)-ligand)(2) x (kappa(1)-ligand) x H(2)O], as verified by crystallographic characterization of five complexes with four different ligands. The chemical stability of the complexes increases when the ligand contains 5,7-dihalo-8-hydroxyquinoline versus an 8-hydroxyquinoline group. The complexes feature a ligand-centered visible absorption band with a maximum at 508-527 nm and an intensity of (7.5-9.6) x 10(3) M(-1) x cm(-1). Upon excitation with UV and visible light within ligand absorption transitions, the complexes display characteristic lanthanide luminescence in the near-infrared at 850-1450 nm with quantum yields and lifetimes in the solid state at room temperature as high as 0.33% and 1.88 micros, respectively. The lanthanide luminescence in the complexes is enhanced upon halogenation of the 5,7-positions in the 8-hydroxyquinoline group and upon the addition of electron-donating substituents to the benzoxazole ring. Facile modification of chromophore units in 2-(2'-benzoxazole)-8-hydroxyquinoline ligands provides means for controlling the luminescence properties of their lanthanide complexes. PMID:19245256

Shavaleev, Nail M; Scopelliti, Rosario; Gumy, Frédéric; Bünzli, Jean-Claude G

2009-04-01

421

Contrasting disease patterns in seropositive and seronegative neuromyelitis optica: A multicentre study of 175 patients  

PubMed Central

Background The diagnostic and pathophysiological relevance of antibodies to aquaporin-4 (AQP4-Ab) in patients with neuromyelitis optica spectrum disorders (NMOSD) has been intensively studied. However, little is known so far about the clinical impact of AQP4-Ab seropositivity. Objective To analyse systematically the clinical and paraclinical features associated with NMO spectrum disorders in Caucasians in a stratified fashion according to the patients' AQP4-Ab serostatus. Methods Retrospective study of 175 Caucasian patients (AQP4-Ab positive in 78.3%). Results Seropositive patients were found to be predominantly female (p < 0.0003), to more often have signs of co-existing autoimmunity (p < 0.00001), and to experience more severe clinical attacks. A visual acuity of ? 0.1 during acute optic neuritis (ON) attacks was more frequent among seropositives (p < 0.002). Similarly, motor symptoms were more common in seropositive patients, the median Medical Research Council scale (MRC) grade worse, and MRC grades ? 2 more frequent, in particular if patients met the 2006 revised criteria (p < 0.005, p < 0.006 and p < 0.01, respectively), the total spinal cord lesion load was higher (p < 0.006), and lesions ? 6 vertebral segments as well as entire spinal cord involvement more frequent (p < 0.003 and p < 0.043). By contrast, bilateral ON at onset was more common in seronegatives (p < 0.007), as was simultaneous ON and myelitis (p < 0.001); accordingly, the time to diagnosis of NMO was shorter in the seronegative group (p < 0.029). The course of disease was more often monophasic in seronegatives (p < 0.008). Seropositives and seronegatives did not differ significantly with regard to age at onset, time to relapse, annualized relapse rates, outcome from relapse (complete, partial, no recovery), annualized EDSS increase, mortality rate, supratentorial brain lesions, brainstem lesions, history of carcinoma, frequency of preceding infections, oligoclonal bands, or CSF pleocytosis. Both the time to relapse and the time to diagnosis was longer if the disease started with ON (p < 0.002 and p < 0.013). Motor symptoms or tetraparesis at first myelitis and > 1 myelitis attacks in the first year were identified as possible predictors of a worse outcome. Conclusion This study provides an overview of the clinical and paraclinical features of NMOSD in Caucasians and demonstrates a number of distinct disease characteristics in seropositive and seronegative patients. PMID:22260418

2012-01-01

422

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 15, NO. 12, DECEMBER 2005 871 Local Oscillator Chain for 1.55 to 1.75 THz  

E-print Network

Chain for 1.55 to 1.75 THz With 100-W Peak Power Alain Maestrini, John S. Ward, Hamid Javadi, Charlotte on the design and performance of a fix-tuned 2 3 3 frequency multiplier chain that covers 1.55­1.75 THz across the band with a peak power of 100 W at 1.665 THz. A similar chain operated at room temperature

Ward, John

423

Fatigue crack growth of {beta}-21S titanium alloy under constant amplitude and miniTWIST flight spectra at 25 C and 175 C  

SciTech Connect

{beta}-21S titanium alloy sheet fatigue crack growth behavior was investigated at 25 C and 175 C under constant amplitude (R = 0.1 and 0.5) and miniTWIST flight spectra. Based upon nominal {Delta}K values, constant amplitude fatigue crack growth behavior at 175 C was either similar to (R = 0.1), or slightly better than (R = 0.5) 25 C. With crack closure taken into account, the fatigue crack growth curves at 175 C, plotted as a function of K{sub eff}, were shifted to the left of the fatigue crack growth curves at 25 C at near threshold values. Under flight spectra conditions, fatigue crack growth life at 175 C was 40 to 90% longer than at 25 C. Flight spectra life calculations using NASA/FLAGRO based upon constant amplitude fatigue crack growth data, were primarily conservative but in good agreement with experimental data. Fatigue crack growth was transgranular with crystalline facets and striations that were evident at higher constant amplitude fatigue crack growth rates and with the miniTWIST spectra. Striations were observed to a limited extent at threshold and near threshold conditions at 25 C, but not at 175 C. Based upon desirable constant and variable amplitude fatigue crack growth and fatigue/fracture crack morphology, this {beta}-21S sheet alloy appears to be an acceptable material for damage tolerant aerospace situations between 25 C and 175 C.

Stephens, R.R.; Albertson, T.P. [Univ. of Idaho, Moscow, ID (United States). Mechanical Engineering; Stephens, R.I.; Veit, A.L. [Univ. of Iowa, Iowa City, IA (United States). Mechanical Engineering

1997-10-01

424

Investigations of the g{sub K}-factors in the {sup 175,177,179}Hf Isotopes  

SciTech Connect

In this paper the intrinsic g{sub K} and effective spin g{sub s} factors of the odd-mass {sup 175-179}Hf isotopes have been investigated within the Tamm-Dancoff approximation by using the realistic Saxon-Woods potential. The theoretically calculated g{sub K} and g{sub s}{sup eff} values are compared with experimental data. The comparison of the measured and calculated values of the effective g{sub s} factor shows that the spin polarization explains quite well the observed reduction of g{sub s} from its free-nucleon value.

Yakut, Hakan; Kuliev, Ali [Sakarya University, Department of physics, Sakarya (Turkey); Guliyev, Ekber [National Academy of Sciences, Institute of Physics, Baku (Azerbaijan)

2008-11-11

425

Wide dispersion of ST175 clone despite high genetic diversity of carbapenem-nonsusceptible Pseudomonas aeruginosa clinical strains in 16 Spanish hospitals.  

PubMed

During the COMParative Activity of Carbapenems Testing (COMPACT) surveillance study, 448 Pseudomonas aeruginosa clinical isolates were obtained from 16 Spanish hospitals. Nonsusceptibility (EUCAST breakpoints) to imipenem (35%), meropenem (33%), and/or doripenem (33%) was observed with 175 isolates (39%). Simultaneous resistance to these three drugs was observed with 126 of the 175 isolates (72%). Except for colistin, high resistance rates were observed among noncarbapenem antibiotics. Clonal relatedness was investigated by pulsed-field gel electrophoresis (PFGE) with SpeI, discriminating 68 patterns. Multilocus sequence typing (MLST) was performed on 84 isolates representing different PFGE types and all participating hospitals. Thirty-nine sequence types (STs) could be distinguished, and of these, ST175 (48 isolates, 10 hospitals), ST646 (16 isolates, 4 hospitals), ST532 (13 isolates, 3 hospitals), and ST111 (13 isolates, 7 hospitals) were the most frequently encountered. Minimum-spanning tree analysis confirmed a wide dissemination of different clones among participant hospitals, particularly ST175. PFGE pattern comparison within the four most frequent STs revealed that ST175 isolates were relatively uniform, while ST646, ST532, and ST111 isolates were highly diverse, with almost every isolate belonging to a unique pulsotype, even when originating from the same center. The population of carbapenem-nonsusceptible P. aeruginosa isolates from 16 hospitals is highly diverse, with one ST (ST175) representing a highly conserved clone disseminated in 10 of the 16 participant hospitals. This ST175 clone should be added to the list of P. aeruginosa clones at high risk for epidemic spread, such as the Liverpool, Manchester, and Melbourne clones previously found in cystic fibrosis patients and ST235 in the nosocomial setting. PMID:21697331

García-Castillo, María; Del Campo, Rosa; Morosini, María Isabel; Riera, Elena; Cabot, Gabriel; Willems, Rob; van Mansfeld, Rosa; Oliver, Antonio; Cantón, Rafael

2011-08-01

426

Etudes optiques de nouveaux materiaux laser: Des orthosilicates dopes a l'ytterbium: Le yttrium (lutetium,scandium) pentoxide de silicium  

NASA Astrophysics Data System (ADS)

La decouverte et l'elaboration de nouveaux materiaux laser solides suscitent beaucoup d'interet parmi la communaute scientifique. En particulier les lasers dans la gamme de frequence du micron debouchent sur beaucoup d'applications, en telecommunication, en medecine, dans le domaine militaire, pour la, decoupe des metaux (lasers de puissance), en optique non lineaire (doublage de frequence, bistabilite optique). Le plus couramment utilise actuellement est le Nd:YAG dans cette famille de laser, mais des remplacants plus performants sont toujours recherches. Les lasers a base d'Yb3+ possedent beaucoup d'avantages compares aux lasers Nd3+ du fait de leur structure electronique simple et de leur deterioration moins rapide. Parmi les matrices cristallines pouvant accueillir l'ytterbium, les orthosilicates Yb:Y 2SiO5, Yb:Lu2SiO5 et Yb:Sc2SiO 5 se positionnent tres bien, du fait de leur bonne conductivite thermique et du fort eclatement de leur champ cristallin necessaire a l'elaboration de lasers quasi-3 niveaux. De plus l'etude fine et systematique des proprietes microscopiques de nouveaux materiaux s'avere toujours tres interessante du point de vue de la recherche fondamentale, c'est ainsi que de nouveaux modeles sont concus (par exemple pour le champ cristallin) ou que de nouvelles proprietes inhabituelles sont decouvertes, menant a de nouvelles applications. Ainsi d'autres materiaux dopes a l'ytterbium sont connus pour leurs proprietes de couplage electron-phonon, de couplage magnetique, d'emission cooperative ou encore de bistabilite optique, mais ces proprietes n'ont encore jamais ete mises en evidence dans Yb:Y 2SiO5, Yb:Lu2SiO5 et Yb:Sc2SiO 5. Ainsi, cette these a pour but l'etude des proprietes optiques et des interactions microscopiques dans Yb:Y2SiO 5, Yb:Lu2SiO5 et Yb:Sc2SiO5. Nous utilisons principalement les techniques d'absorption IR et de spectroscopie Raman pour determiner les excitations du champ cristallin et les modes de vibration dans le materiau. Des mesures optiques sous champ magnetique ont egalement ete effectuees dans le but de caracteriser le comportement de ces excitations lorsqu'elles sont soumises a l'effet Zeeman. La resonance paramagnetique electronique a permis de completer cette etude de l'eclatement Zeeman suivant toutes les orientations du cristal. Enfin la fluorescence par excitation selective et la fluorescence induite par Raman FT, completent la description des niveaux d'energie et revelent l'existence d'emission cooperative de deux ions Yb3+ et de transferts d'energie. Les resultats de cette these apportent une contribution originale dans le domaine des nouveaux materiaux lasers par l'etude et la comprehension des interactions fines et des proprietes microscopiques d'un materiau en particulier. Ils debouchent a la fois sur des applications possibles dans le domaine de l'optique et des lasers, et sur la comprehension d'aspects fondamentaux. Cette these a prouve l'interet de ces matrices pour leur utilisation comme lasers solides: un fort eclatement du champ cristallin favorable a l'elaboration de laser quasi-3 niveaux, et de larges bandes d'absorption (dues a un fort couplage electron-phonon et a des raies satellites causees par une interaction d'echange entre deux ions Yb3+) qui permettent la generation d'impulsions laser ultra-courtes, l'accordabilite du laser, etc. De plus la miniaturisation des lasers est possible pour l'optique integree grace a des couches minces synthetisees par epitaxie en phase liquide dont nous avons demontre la tres bonne qualite structurale et l'ajustement possible de certains parametres. Nous avons reconstruit le tenseur g du niveau fondamental (qui donne des informations precieuses sur les fonctions d'onde), ceci dans le but d'aider les theoriciens a concevoir un modele de champ cristallin valide. Plusieurs mecanismes de transferts d'energie ont ete mis en evidence: un mecanisme de relaxation d'un site vers l'autre, un mecanisme d'emission cooperative, et un mecanisme d'excitation de l'Yb3+ par le Tm3+ (impurete presente dans le materiau). Ces transferts sont

Denoyer, Aurelie

427

Decreased Sensitivity to Changes in the Concentration of Metal Ions as the Basis for the Hyperactivity of DtxR(E175K)  

SciTech Connect

The metal-ion-activated diphtheria toxin repressor (DtxR) is responsible for the regulation of virulence and other genes in Corynebacterium diphtheriae. A single point mutation in DtxR, DtxR(E175K), causes this mutant repressor to have a hyperactive phenotype. Mice infected with Mycobacterium tuberculosis transformed with plasmids carrying this mutant gene show reduced signs of the tuberculosis infection. Corynebacterial DtxR is able to complement mycobacterial IdeR and vice versa. To date, an explanation for the hyperactivity of DtxR(E175K) has remained elusive. In an attempt to address this issue, we have solved the first crystal structure of DtxR(E175K) and characterized this mutant using circular dichroism, isothermal titration calorimetry, and other biochemical techniques. The results show that although DtxR(E175K) and the wild type have similar secondary structures, DtxR(E175K) gains additional thermostability upon activation with metal ions, which may lead to this mutant requiring a lower concentration of metal ions to reach the same levels of thermostability as the wild-type protein. The E175K mutation causes binding site 1 to retain metal ion bound at all times, which can only be removed by incubation with an ion chelator. The crystal structure of DtxR(E175K) shows an empty binding site 2 without evidence of oxidation of Cys102. The association constant for this low-affinity binding site of DtxR(E175K) obtained from calorimetric titration with Ni(II) is K{sub a} = 7.6 {+-} 0.5 x 10{sup 4}, which is very similar to the reported value for the wild-type repressor, K{sub a} = 6.3 x 10{sup 4}. Both the wild type and DtxR(E175K) require the same amount of metal ion to produce a shift in the electrophoretic mobility shift assay, but unlike the wild type, DtxR(E175K) binding to its cognate DNA [tox promoter-operator (toxPO)] does not require metal-ion supplementation in the running buffer. In the timescale of these experiments, the Mn(II)-DtxR(E175K)-toxPO complex is insensitive to changes in the environmental cation concentrations. In addition to Mn(II), Ni(II), Co(II), Cd(II), and Zn(II) are able to sustain the hyperactive phenotype. These results demonstrate a prominent role of binding site 1 in the activation of DtxR and support the hypothesis that DtxR(E175K) attenuates the expression of virulence due to the decreased ability of the Me(II)-DtxR(E175K)-toxPO complex to dissociate at low concentrations of metal ions.

D’ Aquino, J. Alejandro; Denninger, Andrew R.; Moulin, Aaron G.; D’ Aquino, Katharine E.; Ringe, Dagmar; (Harvard-Med); (Brandeis)

2010-01-12

428

Studies on the Q175 Knock-in Model of Huntington’s Disease Using Functional Imaging in Awake Mice: Evidence of Olfactory Dysfunction  

PubMed Central

Blood oxygen level dependent (BOLD) imaging in awake mice was used to identify differences in brain activity between wild-type, HETzQ175, and HOMzQ175 genotypes in response to the odor of almond. The study was designed to see how alterations in the huntingtin gene in a mouse model of Huntington’s disease would affect the perception and processing of almond odor, an evolutionarily conserved stimulus with high emotional and motivational valence. Moreover, the mice in this study were “odor naïve,” i.e., never having smelled almond or any nuts. Using a segmented, annotated MRI atlas of the mouse and computational analysis, 17 out of 116 brain regions were identified as responding differently to almond odor across genotypes. These regions included the glomerulus of the olfactory bulb, forebrain cortex, anterior cingulate, subiculum, and dentate gyrus of the hippocampus, and several areas of the hypothalamus. In many cases, these regions showed a gene-dose effect with HETzQ175 mice showing a reduction in brain activity from wild-type that is further reduced in HOMzQ175 mice. Conspicuously absent were any differences in brain activity in the caudate/putamen, thalamus, CA3, and CA1 of the hippocampus and much of the cortex. The glomerulus of the olfactory bulb in HOMzQ175 mice showed a reduced change in BOLD signal intensity in response to almond odor as compared to the other phenotypes suggesting a deficit in olfactory sensitivity. PMID:25071696

Ferris, Craig F.; Kulkarni, Praveen; Toddes, Steven; Yee, Jason; Kenkel, William; Nedelman, Mark

2014-01-01

429

Improved sample-holder design for specific-heat measurements in magnetic fields up to 17.5 T  

NASA Astrophysics Data System (ADS)

By the use of a gold-plated silver sample holder, and a RuO2-Cernox combination thermometer, low-temperature specific-heat measurements in the temperature range from 0.35 to 90 K, and in magnetic fields up to 17.5 T, have become possible with remarkably improved accuracy. At 500 mK, the lower limit for the heat capacity that can be measured amounts to 0.02 mJ/K. The sensitivity in that case is about 0.3 ?J/K. The error margin is 1% for large heat capacities (larger than twice the sample-holder contribution) at higher temperatures, increasing to 3% for small heat capacities (half of the sample-holder contribution) around 500 mK. In high fields, for accurate measurements (error <3%) the temperature range is restricted to above 0.5 K.

Klaasse, J. C. P.; Hagmusa, I. H.; Brück, E.

1997-11-01

430

Formation of Po isotopes in the reactions {sup 27}Al + {sup 175}Lu and {sup 31}P + {sup 169}Tm  

SciTech Connect

The excitation functions and the cross sections for the formation of {sup 192-198}Po isotopes in the reactions {sup 27}Al + {sup 175}Lu and {sup 31}P + {sup 169}Tm are measured. A comparison of the results obtained for these reactions with the data on the cross sections for the formation of Po isotopes in the reaction {sup 100}Mo + {sup 92-100}Mo leads to the conclusion that the characteristics of the evaporation channel do not depend on the mass of the bombarding ion up to the complete symmetry in the input channel. It is shown that the experimental data can be adequately described using the statistical approach to the deexcitation of a compound nucleus only under the assumption that the liquid-drop fission barrier is reduced significantly for neutron-deficient Po isotopes. 21 refs., 5 figs., 2 tabs.

Andreev, A.N.; Bogdanov, D.D.; Eremin, A.V. [Joint Institute for Nuclear Research, Moscow (Russian Federation)] [and others

1995-05-01

431

175 MeV Au{sup +13} ion irradiation induced structural and morphological modifications in zinc oxide thin films  

SciTech Connect

Thin films of ZnO were deposited, on Si substrates, using the RF-sputtering technique and irradiated by the 175 MeV Au{sup +13} beams. The structural changes were investigated by x-ray diffraction (XRD) measurements. The particle size found to increase with the increasing ion fluence up to 1 Multiplication-Sign 10{sup 12} ion/cm{sup 2}. At highest irradiation fluence of 5 Multiplication-Sign 10{sup 12} ion/cm{sup 2} the average particle size decreases. The Raman spectroscopy measurements were performed to understand the local phonon mode of the samples. The surface morphology of the as-deposited and irradiated thin films is measured by the Atomic Force Microscopy (AFM).

Singh, Devendra [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India); Sharma, Aditya [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India) and Department of Applied Sciences and Humanities, Krishna Institute of Engineering and Technology, Ghaziabad-201206, U.P. (India); Varshney, Mayora; Verma, K. D. [Materials Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, UP (India) and Department of Applied Sciences and Humanities, Krishna Institute of Engineering and Technolog (India); Kumar, Shalendra [School of Nano and Advanced Materials Engineering, Changwon National University, 9 Sarim-dong, Changwon- 641-773 (Korea, Republic of)

2013-02-05

432

Semi-Inclusive Lambda and Kshort Production in p-Au Collisions at 17.5 GeV/c  

E-print Network

The first detailed measurements of the centrality dependence of strangeness production in p-A collisions are presented. Lambda and Kshort dn/dy distributions from 17.5 GeV/c p-Au collisions are shown as a function of "grey" track multiplicity and the estimated number of collisions, nu, made by the proton. The nu dependence of the Lambda yield deviates from a scaling of p-p data by the number of participants, increasing faster than this scaling for nu<=5 and saturating for larger nu. A slower growth in Kshort multiplicity with nu is observed, consistent with a weaker nu dependence of K-Kbar production than Y-K production.

I. Chemakin; V. Cianciolo; B. A. Cole; R. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. Kirk; N. Maeda; S. Mioduszewski; D. Morrison; M. Moulson; M. N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; S. Sorensen; J. H. Thomas; Y. Torun; D. Winter; X. Yang; W. A. Zajc; Y. Zhang

2000-10-03

433

IDCS J1426.5+3508: DISCOVERY OF A MASSIVE, INFRARED-SELECTED GALAXY CLUSTER AT z = 1.75  

SciTech Connect

We report the discovery of an IR-selected massive galaxy cluster in the IRAC Deep Cluster Survey (IDCS). We present new data from the Hubble Space Telescope and the W. M. Keck Observatory that spectroscopically confirm IDCS J1426.5+3508 at z = 1.75. Moreover, the cluster is detected in archival Chandra data as an extended X-ray source, comprising 53 counts after the removal of point sources. We calculate an X-ray luminosity of L{sub 0.5-2keV} = (5.4 {+-} 1.2) Multiplication-Sign 10{sup 44} erg s{sup -1} within r = 60 arcsec ({approx}1 Mpc diameter), which implies M{sub 200,L{sub x}}= (5.3{+-}1.6) Multiplication-Sign 10{sup 14} M{sub Sun }. IDCS J1426.5+3508 appears to be an exceptionally massive cluster for its redshift.

Stanford, S. A.; Zeimann, Greg [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Brodwin, M. [Department of Physics and Astronomy, University of Missouri, Kansas City, MO 64110 (United States); Gonzalez, Anthony H.; Mancone, C. [Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States); Stern, Daniel; Eisenhardt, P. R. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Dey, Arjun [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Snyder, Gregory F., E-mail: stanford@physics.ucdavis.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2012-07-10

434

Hickey -TT175, casts 220, line 222-229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date/Time (MMDDYYHHMM) Total Scans  

E-print Network

Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date,220 #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date #12;Hickey -TT175, casts 220, line 222- 229,231-232 Cruise cast lat(dd.mm.mm) lon(dd.mm.mm) Date

Hickey, Barbara

435

Mapping of intracellular localization domains and evidence for colocalization interactions between the IE110 and IE175 nuclear transactivator proteins of herpes simplex virus.  

PubMed Central

Transcriptional regulation by the IE175 (ICP4) and IE110 (ICP0) phosphorylated nuclear proteins encoded by herpes simplex virus (HSV) appears to be a key determinant for the establishment of successful lytic cycle infection. By indirect immunofluorescence in transient DNA transfection assays, we have examined the intracellular distribution of deletion and truncation mutants of both IE175 and IE110 from HSV-1. Insertion of short oligonucleotides encoding the basic amino acid motifs 726-GRKRKSP-732 from IE175 and 500-VRPRKRR-506 from IE110 into deleted cytoplasmic forms of the two proteins restored the karyophilic phenotype and confirmed that these motifs are both necessary and sufficient for proper nuclear localization. Analysis of IE110 deletion mutants and a panel of IE110/IE175 hybrid proteins was also used to evaluate the characteristic IE110 distribution within nuclear punctate granules as seen by immunofluorescence and phase-contrast microscopy. The phase-dense punctate pattern persisted with both large C-terminal truncations and deletions of the Cys-rich zinc finger region and even with a form of IE110 that localized in the cytoplasm, implying that the punctate characteristic is an intrinsic property of the N-terminal segment of the IE110 protein. Transfer of the full IE110-like punctate phenotype to the normally uniform diffuse nuclear pattern of the IE175 protein by exchange of the N-terminal domains of the two proteins demonstrated that the first 105 to 244 amino acids of IE110 represent the most important region for conferring punctate characteristics. Surprisingly, cotransfection of a wild-type nuclear IE175 gene together with the IE110 gene revealed that much of the IE175 protein produced was redistributed into a punctate pattern that colocalized with the IE110-associated punctate granules seen in the same cells. This colocalization did not occur after cotransfection of IE110 with the IE72 (IE1) nuclear protein of human cytomegalovirus and therefore cannot represent simple nonspecific trapping. Evidently, the punctate phenotype of IE110 represents a dominant characteristic that reveals the potential of IE110 and IE175 to physically interact with each other either directly or indirectly within the intracellular environment. Images PMID:8151787

Mullen, M A; Ciufo, D M; Hayward, G S

1994-01-01

436

In vivo tumour and metastasis reduction and in vitro effects on invasion assays of the ruthenium RM175 and osmium AFAP51 organometallics in the mammary cancer model.  

PubMed

We have compared the organometallic arene complexes [(eta(6)-biphenyl)M(ethylenediamine)Cl](+) RM175 (M=Ru(II)) and its isostructural osmium(II) analogue AFAP51 (M=Os(II)) for their ability to induce cell detachment resistance from fibronectin, collagen IV and poly-l-lysine, and cell re-adhesion after treatment, their effects on cell migration and cell viability, on matrix metalloproteinases production, and on primary tumour growth of MCa mammary carcinoma, the effect of human serum albumin on their cytotoxicity. There are differences between ruthenium and osmium. The Os complex is up to 6x more potent than RM175 towards highly-invasive breast MDA-MB-231, human breast MCF-7 and human epithelial HBL-100 cancer cells, but whereas RM175 was active against MCa mammary carcinoma in vivo and caused metastasis reduction, AFAP51 was not. Intriguingly the presence of human serum albumin in the growth medium enhanced the cytotoxicity of both compounds. RM175 increased the resistance of MDA-MB-231 cells to detachment from substrates and both compounds inhibited the production of MMP-2. These data confirm the key role of ruthenium itself in anti-metastatic activity. It will be interesting to explore the activity of osmium arene complexes in other tumour models and the possibility of changing the non-arene ligands to tune the anticancer activity of osmium in vivo. PMID:19906432

Bergamo, A; Masi, A; Peacock, A F A; Habtemariam, A; Sadler, P J; Sava, G

2010-01-01

437

41 CFR 102-38.175 - How do we find out if a person or entity has been suspended or debarred from doing business with...  

Code of Federal Regulations, 2013 CFR

...Management 3 2013-07-01 2013-07-01 false How do we find out if a person or entity has been suspended or debarred from...PROPERTY Bids Buyer Eligibility § 102-38.175 How do we find out if a person or entity has been suspended or debarred...

2013-07-01

438

41 CFR 102-38.175 - How do we find out if a person or entity has been suspended or debarred from doing business with...  

Code of Federal Regulations, 2010 CFR

...Management 3 2010-07-01 2010-07-01 false How do we find out if a person or entity has been suspended or debarred from...PROPERTY Bids Buyer Eligibility § 102-38.175 How do we find out if a person or entity has been suspended or debarred...

2010-07-01

439

41 CFR 102-38.175 - How do we find out if a person or entity has been suspended or debarred from doing business with...  

Code of Federal Regulations, 2014 CFR

...Management 3 2014-01-01 2014-01-01 false How do we find out if a person or entity has been suspended or debarred from...PROPERTY Bids Buyer Eligibility § 102-38.175 How do we find out if a person or entity has been suspended or debarred...

2014-01-01

440

41 CFR 102-38.175 - How do we find out if a person or entity has been suspended or debarred from doing business with...  

Code of Federal Regulations, 2011 CFR

...Management 3 2011-01-01 2011-01-01 false How do we find out if a person or entity has been suspended or debarred from...PROPERTY Bids Buyer Eligibility § 102-38.175 How do we find out if a person or entity has been suspended or debarred...

2011-01-01

441

41 CFR 102-38.175 - How do we find out if a person or entity has been suspended or debarred from doing business with...  

Code of Federal Regulations, 2012 CFR

...Management 3 2012-01-01 2012-01-01 false How do we find out if a person or entity has been suspended or debarred from...PROPERTY Bids Buyer Eligibility § 102-38.175 How do we find out if a person or entity has been suspended or debarred...

2012-01-01

442

Use of Salt Baths in the Temperature Range from 175 °C to 540 °C with Uncertainties of Less than 30 m°C  

NASA Astrophysics Data System (ADS)

Calibration of thermometers in the temperature range from -80 °C to 550 °C requires liquid baths; alcohol, water, silicon oil, salt baths and dry block furnaces. In this study, the use of salt baths outside of their usual range of 250 °C to 540 °C for calibrating thermometers in the range between 175 °C and 250 °C is proposed. The calibration range from 150 °C to 250 °C is usually covered by an oil bath, but utilizing a salt bath saves calibration time and resources, improves stability and homogeneity, allows longer term usage of the liquid, and reduces hazardous chemical vapors evaporated at temperatures above 175 °C. This proposal is based on a study of the uncertainty contributions at varying salt bath temperatures in the range from 175 °C to 540 °C which was carried out in this study. Results achieved and analyzed in this study indicate that the implementation of salt baths in this lower temperature range provides opportunities to calibrate reference and/or working thermometers with an uncertainty below 30 m°C, almost the same as the oil-bath uncertainty in the range of 175 °C to 250 °C. The main components of uncertainty contributed by a salt bath over this temperature range are discussed in this study.

Alper, F. Melda Patan; Ince, Ahmet T.; Aiordachioaiei, Maria

2011-01-01

443

ENVIRONMENTAL TECHNOLOGY VERIFICATION, TEST REPORT OF CONTROL OF BIOAEROSOLS IN HVAC SYSTEMS:AAF INTERNATIONAL, PERFECTPLEAT ULTRA, 175-102-863  

EPA Science Inventory

The Environmental Technology Verification report discusses the technology and performance of the PerfectPleat Ultra 175-102-863 air filter for dust and bioaerosol filtration manufactured by AAF International. The pressure drop across the filter was 112 Pa clean and 229 Pa dust lo...

444

IDCS J1426.5+3508: COSMOLOGICAL IMPLICATIONS OF A MASSIVE, STRONG LENSING CLUSTER AT z = 1.75  

SciTech Connect

The galaxy cluster IDCS J1426.5+3508 at z = 1.75 is the most massive galaxy cluster yet discovered at z > 1.4 and the first cluster at this epoch for which the Sunyaev-Zel'Dovich effect has been observed. In this paper, we report on the discovery with Hubble Space Telescope imaging of a giant arc associated with this cluster. The curvature of the arc suggests that the lensing mass is nearly coincident with the brightest cluster galaxy, and the color is consistent with the arc being a star-forming galaxy. We compare the constraint on M{sub 200} based upon strong lensing with Sunyaev-Zel'Dovich results, finding that the two are consistent if the redshift of the arc is z {approx}> 3. Finally, we explore the cosmological implications of this system, considering the likelihood of the existence of a strongly lensing galaxy cluster at this epoch in a {Lambda}CDM universe. While the existence of the cluster itself can potentially be accommodated if one considers the entire volume covered at this redshift by all current high-redshift cluster surveys, the existence of this strongly lensed galaxy greatly exacerbates the long-standing giant arc problem. For standard {Lambda}CDM structure formation and observed background field galaxy counts this lens system should not exist. Specifically, there should be no giant arcs in the entire sky as bright in F814W as the observed arc for clusters at z {>=} 1.75, and only {approx}0.3 as bright in F160W as the observed arc. If we relax the redshift constraint to consider all clusters at z {>=} 1.5, the expected number of giant arcs rises to {approx}15 in F160W, but the number of giant arcs of this brightness in F814W remains zero. These arc statistic results are independent of the mass of IDCS J1426.5+3508. We consider possible explanations for this discrepancy.

Gonzalez, Anthony H.; Fedeli, Cosimo; Mancone, Conor [Department of Astronomy, University of Florida, Gainesville, FL 32611-2055 (United States); Stanford, S. Adam; Zeimann, Greg [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Brodwin, Mark [Department of Physics, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110 (United States); Dey, Arjun [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Eisenhardt, Peter R. M.; Stern, Daniel [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

2012-07-10

445

miR-17-5p Downregulation Contributes to Paclitaxel Resistance of Lung Cancer Cells through Altering Beclin1 Expression  

PubMed Central

Non- small- cell lung cancer (NSCLC) is one of the most leading causes of cancer-related deaths worldwide. Paclitaxel based combination therapies have long been used as a standard treatment in aggressive NSCLCs. But paclitaxel resistance has emerged as a major clinical problem in combating non-small-cell lung cancer and autophagy is one of the important mechanisms involved in this phenomenon. In this study, we used microRNA (miRNA) arrays to screen differentially expressed miRNAs between paclitaxel sensitive lung cancer cells A549 and its paclitaxel-resistant cell variant (A549-T24). We identified miR-17-5p was one of most significantly downregulated miRNAs in paclitaxel-resistant lung cancer cells compared to paclitaxel sensitive parental cells. We found that overexpression of miR-17-5p sensitized paclitaxel resistant lung cancer cells to paclitaxel induced apoptotic cell death. Moreover, in this report we demonstrated that miR-17-5p directly binds to the 3?-UTR of beclin 1 gene, one of the most important autophagy modulator. Overexpression of miR-17-5p into paclitaxel resistant lung cancer cells reduced beclin1 expression and a concordant decease in cellular autophagy. We also observed similar results in another paclitaxel resistant lung adenosquamous carcinoma cells (H596-TxR). Our results indicated that paclitaxel resistance of lung cancer is associated with downregulation of miR-17-5p expression which might cause upregulation of BECN1 expression. PMID:24755562

Chatterjee, Abhisek; Chattopadhyay, Dhrubajyoti; Chakrabarti, Gopal

2014-01-01

446

On deformation twinning in a 17.5%Mn-TWIP steel: A physically-based phenomenological model  

SciTech Connect

TWinning Induced Plasticity (TWIP) steel is a typical representative of the 2nd generation of advanced high strength steel (AHSS) which exhibits a combination of high strength and excellent ductility due to the twinning mechanisms. This paper discusses the principal features of deformation twinning in faced-centered cubic austenitic steels and shows how a physiscally-based macroscopic model can be derived from microscopic considerations. In fact, a dislocation-based phenomenological model, with internal state variables such as dislocation density and micro-twins volume fraction representing the microstructure evolution during deformation process, is proposed to describe the deformation behavior of TWIP steels. The contribution of this work is the incorporation of a physically-based twin’s nucleation and volume fraction evolution model in a conventional dislocation-based approach. Microstructural level investigations, using scanning electron microscope (SEM) and transmission electron microscope (TEM) techniques, for the TWIP steel Fe–17.5 wt.% Mn–1.4 wt.% Al- 0.56 wt.% C, are used to validate and verify modeling assumptions. The model could be regarded as a semi-phenomenological approach with sufficient links between microstructure and overall properties and therefore offers good predictive capabilities. Its simplicity also allows a modular implementation in finite element-based metal forming simulations.

Soulami, Ayoub; Choi, Kyoo Sil; Shen, Y. F.; Liu, Wenning N.; Sun, Xin; Khaleel, Mohammad A.

2011-01-25

447

HYDROGEN EFFECTS ON FRACTURE TOUGHNESS OF TYPE 316L STAINLESS STEEL FROM 175 K TO 425 K  

SciTech Connect

The effects of hydrogen on the fracture-toughness properties of Type 316L stainless steel from 175 K to 425 K were measured. Fracture-toughness samples were fabricated from Type 316L stainless steel forgings and hydrogen-charged with hydrogen at 34 MPa and 623 K for two weeks prior to testing. The effect of hydrogen on the J-Integral vs. crack extension behavior was measured at various temperatures by fracturing non-charged and hydrogen-charged samples in an environmental chamber. Hydrogen-charged steels had lower toughness values than non-charged ones, but still retained good toughness properties. The fracture-toughness values of hydrogen-charged samples tested near ambient temperature were about 70% of non-charged values. For hydrogen-charged samples tested at 225 K and 425 K, the fracture-toughness values were 50% of the non-charged values. In all cases, fracture occurred by microvoid nucleation and coalescence, although the hydrogen-charged samples had smaller and more closely spaced microvoids. The results suggest that hydrogen effects on toughness are greater at 225 K than they are at ambient temperature because of strain-induced martensite formation. At 425 K, the hydrogen effects on toughness are greater than they are at ambient temperature because of the higher mobility of hydrogen.

Morgan, M; Glenn Chapman, G

2009-05-04

448

[Acquired immunodeficiency syndrome in elderly persons in a tropical zone. Apropos of 175 cases in the Congo].  

PubMed

The objective of this study has been to estimate the frequency of AIDS occurring in older age groups on the basis of hospital statistics and note the prognostic particularities in these groups. One hundred and seventy five (175) cases of AIDS reported to the University Hospital Center of Brazzaville occurring in persons aged 55 years and over were followed up retrospectively from 1 January 1990 to 31 December 1996. The results of this study indicate that AIDS is not rare in older age groups: 4.7% of all infected subjects registered during the period of study. The sex-ratio was 1.3/1 (99 males and 76 females). The overall mean age was 60.45. Contamination seems to be the most often of heterosexual origin. Many symptoms were found. The most frequent ones were weight loss (100% cases), fever (89.7%), diarrhoea (60.5%), neuro-psychiatric disorders (49.7%), and respiratory manifestations (50.2%). Lethal evolution was rapid, with 74% deaths at the end of the 1st year and 100% at the end of 2nd year, as a consequence of delayed diagnosis as well as the natural development of the disease. The results of this study point to the necessity of prevention strategies which include not only young, but older age groups as well. PMID:12145951

Ibara, J R; Itoua, C; Gathse, A; Obengui; Gassaye, Deby; Nkoua, J L; Itoua-Ngaporo, A

2002-06-01

449

LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on G  

NASA Technical Reports Server (NTRS)

LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A01 The Graphite-Polyimide and Graphite-Epoxy Mechanical Properties experiment is located in two (2) three (3) inch deep peripheral trays, A01 and A07. The experiment hardware configuration in the A01 tray consists of a graph- ite-epoxy honeycomb sandwich panel in the lower one half (1/2) of the tray, a graphite-epoxy panel in the upper right one third (1/3rd) section and two (2) graphite-polyimide panels, one in the upper center and one in the upper left sections of the experiment tray. The panels are supported by a substructure and held in place with aluminum strips and non-magnetic stainless steel fasteners. The mounting system, designed to allow for differential thermal expansion, minimizes the risk of inducing high stresses into the test panels.

1984-01-01

450

Crystal structure of a ribonuclease from the seeds of bitter gourd (Momordica charantia) at 1.75 A resolution.  

PubMed

The ribonuclease MC1 (RNase MC1) from seeds of bitter gourd (Momordica charantia) consists of 190 amino acid residues with four disulfide bridges and belongs to the RNase T(2) family, including fungal RNases typified by RNase Rh from Rhizopus niveus and RNase T(2) from Aspergillus oryzae. The crystal structure of RNase MC1 has been determined at 1.75 A resolution with an R-factor of 19.7% using the single isomorphous replacement method. RNase MC1 structurally belongs to the (alpha+beta) class of proteins, having ten helices (six alpha-helices and four 3(10)-helices) and eight beta-strands. When the structures of RNase MC1 and RNase Rh are superposed, the close agreement between the alpha-carbon positions for the total structure is obvious: the root mean square deviations calculated only for structurally related 151 alpha-carbon atoms of RNase MC1 and RNase Rh molecules was 1.76 A. Furthermore, the conformation of the catalytic residues His-46, Glu-105, and His-109 in RNase Rh can be easily superposed with that of the possible catalytic residues His-34, Glu-84, and His-88 in RNase MC1. This observation strongly indicates that RNase MC1 from a plant origin catalyzes RNA degradation in a similar manner as fungal RNases. PMID:10446375

Nakagawa, A; Tanaka, I; Sakai, R; Nakashima, T; Funatsu, G; Kimura, M

1999-08-17

451

Emission of Long-Range Alpha Particles in the Fission of U238 with 17.5MeV Protons  

Microsoft Academic Search

The angular distribution of long-range alpha particles from ternary fission induced by 17.5-MeV protons incident on U238 has been measured with respect to both the fission-fragment axis and the beam direction. For alpha particles emitted perpendicularly to the fragment direction, the distributions are found to be independent of the azimuthal angle about the fission-fragment separation axis and independent of the

R. A. Atneosen; T. D. Thomas; G. T. Garvey

1965-01-01

452

Characterization of Neurophysiological and Behavioral Changes, MRI Brain Volumetry and 1H MRS in zQ175 Knock-In Mouse Model of Huntington's Disease  

PubMed Central

Huntington's disease (HD) is an autosomal neurodegenerative disorder, characterized by severe behavioral, cognitive, and motor deficits. Since the discovery of the huntingtin gene (HTT) mutation that causes the disease, several mouse lines have been developed using different gene constructs of Htt. Recently, a new model, the zQ175 knock-in (KI) mouse, was developed (see description by Menalled et al, [1]) in an attempt to have the Htt gene in a context and causing a phenotype that more closely mimics HD in humans. Here we confirm the behavioral phenotypes reported by Menalled et al [1], and extend the characterization to include brain volumetry, striatal metabolite concentration, and early neurophysiological changes. The overall reproducibility of the behavioral phenotype across the two independent laboratories demonstrates the utility of this new model. Further, important features reminiscent of human HD pathology are observed in zQ175 mice: compared to wild-type neurons, electrophysiological recordings from acute brain slices reveal that medium spiny neurons from zQ175 mice display a progressive hyperexcitability; glutamatergic transmission in the striatum is severely attenuated; decreased striatal and cortical volumes from 3 and 4 months of age in homo- and heterozygous mice, respectively, with whole brain volumes only decreased in homozygotes. MR spectroscopy reveals decreased concentrations of N-acetylaspartate and increased concentrations of glutamine, taurine and creatine + phosphocreatine in the striatum of 12-month old homozygotes, the latter also measured in 12-month-old heterozygotes. Motor, behavioral, and cognitive deficits in homozygotes occur concurrently with the structural and metabolic changes observed. In sum, the zQ175 KI model has robust behavioral, electrophysiological, and histopathological features that may be valuable in both furthering our understanding of HD-like pathophyisology and the evaluation of potential therapeutic strategies to slow the progression of disease. PMID:23284644

Heikkinen, Taneli; Lehtimäki, Kimmo; Vartiainen, Nina; Puoliväli, Jukka; Hendricks, Susan J.; Glaser, Jack R.; Bradaia, Amyaouch; Wadel, Kristian; Touller, Chrystelle; Kontkanen, Outi; Yrjänheikki, Juha M.; Buisson, Bruno; Howland, David; Beaumont, Vahri; Munoz-Sanjuan, Ignacio; Park, Larry C.

2012-01-01

453

JOURNAL DE PHYSIQUE Colloque. C3, supplment au no 4, Tome 35, Aril 1974, page C3-175 PHOTOLUMINESCENCE DANS LE SULFWRE DE CADMIUM  

E-print Network

-175 PHOTOLUMINESCENCE DANS LE SULFWRE DE CADMIUM DOP� AU LITHIUM (*) J. L. PLOIX (**) et M. DUGUE Thomson-CSF (LCR), France Résumé. -Dans le but de réaliser des jonctions P-N électroiuminescentesdans le sulfure de cadmium étudié en photoIuminescence. Des platelettes de sulfure de cadmium obtenues en phase vapeur ont été

Boyer, Edmond

454

Inclusive soft pion production from 12.3 and 17.5 GeV\\/c protons on Be, Cu, and Au  

Microsoft Academic Search

Differential cross sections are presented for the inclusive production of charged pions in the momentum range 0.1-1.2 GeV\\/c in interactions of 12.3 and 17.5 GeV\\/c protons with Be, Cu, and Au targets. The measurements were made by Experiment 910 at the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory. The cross sections are presented as a function of pion total

I. Chemakin; V. Cianciolo; B. A. Cole; R. A. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. G. Kirk; N. Maeda; R. L. McGrath; S. Mioduszewski; D. Morrison; M. Moulson; M. N. Namboodiri; R. B. Palmer; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; S. Sorensen; J. H. Thomas; Y. Torun; D. L. Winter; X. Yang; W. A. Zajc; Y. Zhang

2002-01-01

455

Pion production by protons on a thin beryllium target at 6.4, 12.3, and 17.5 GeV\\/c incident proton momenta  

Microsoft Academic Search

An analysis of inclusive pion production in proton-beryllium collisions at 6.4, 12.3, and 17.5 GeV\\/c proton beam momentum has been performed. The data were taken by Experiment 910 at the Alternating Gradient Synchrotron at the Brookhaven National Laboratory. The differential pi+ and pi- production cross sections (d2sigma\\/dpdOmega) were measured up to 400 mrad in thetapi and up to 6 GeV\\/c

I. Chemakin; Vince Cianciolo; B. A. Cole; R. C. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. G. Kirk; J. M. Link; N. Maeda; R. L. McGrath; S. Mioduszewski; J. Monroe; D. Morrison; M. Moulson; M. N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; M. Sorel; S. Sorensen; J. H. Thomas; Y. Torun; D. L. Winter; X. Yang; W. A. Zajc; Y. Zhang

2008-01-01

456

Bragg diffraction using a 100 ps 17.5 keV x-ray backlighter and the Bragg diffraction imager  

Microsoft Academic Search

A new diagnostic for measuring Bragg diffraction of petawatt-generated high-energy x rays off a laser-compressed crystal was designed and tested successfully at the Omega EP laser facility on static Mo and Ta (111) oriented single crystal samples using a 17.5 keV Mo Kalpha backlighter. The Bragg diffraction imager consists of a heavily shielded enclosure and a precisely positioned beam block

B. R. Maddox; H.-S. Park; J. Hawreliak; A. Elsholz; R. van Maren; B. A. Remington; A. Comley; J. S. Wark

2010-01-01

457

Effect of oxygen on phase formation and thermal stability of slowly cooled Zr 65Al 7.5Cu 17.5Ni 10 metallic glass  

Microsoft Academic Search

The effect of small amounts of oxygen (0.28–0.6at.%) on the phase formation and the thermal stability of bulk samples of the Zr65Al7.5Cu17.5Ni10 alloy prepared by die casting into a copper mould has been studied by X-ray diffraction, microstructural characterization and differential scanning calorimetry. In contrast to rapidly quenched ribbons, the crystalline volume fraction in slowly cooled bulk samples increases with

A. Gebert; J. Eckert; L. Schultz

1998-01-01

458

Safety and Immunogenicity of a Recombinant Nonglycosylated Erythrocyte Binding Antigen 175 Region II Malaria Vaccine in Healthy Adults Living in an Area Where Malaria Is Not Endemic?  

PubMed Central

Erythrocyte binding antigen region II (EBA-175) is a conserved antigen of Plasmodium falciparum that is involved in binding of the parasite to the host's erythrocytes. We evaluated the safety and immunogenicity of a recombinant EBA-175 vaccine with aluminum phosphate adjuvant in healthy young adults living in the United States. Eighteen subjects/group received ascending doses (5, 20, 80, or 160 ?g) of the vaccine at 0, 1, and 6 months; 8 subjects received placebo. Most of the injection site and systemic reactions were mild to moderate in intensity. After 2 or 3 doses of the vaccine at any concentration, antibody levels measured by enzyme-linked immunosorbent assay were significantly higher than those for the placebo group. Sera from subjects who received 3 doses of the vaccine at any concentration inhibited the growth of erythrocyte-stage P. falciparum at low levels compared to sera from placebo recipients or preimmune sera. In conclusion, the EBA-175 vaccine with adjuvant was safe and immunogenic in malaria-naïve subjects. PMID:20702657

El Sahly, H. M.; Patel, S. M.; Atmar, R. L.; Lanford, T. A.; Dube, T.; Thompson, D.; Sim, B. K. L.; Long, C.; Keitel, W. A.

2010-01-01

459

Characterization of twin boundaries in an Fe–17.5Mn–0.56C twinning induced plasticity steel  

SciTech Connect

A twinning-induced plasticity steel of composition Fe–17.5 wt.% Mn–0.56 wt.% C–1.39 wt.% Al–0.24 wt.% Si was analyzed for the purpose of characterizing the relationship between tensile strain and deformation twinning. Tensile samples achieved a maximum of 0.46 true strain at failure, and a maximum ultimate tensile strength of 1599 MPa. Electron backscatter diffraction (EBSD) analysis showed that the grain orientation rotated heavily to < 111 > parallel to the tensile axis above 0.3 true strain. Sigma 3 misorientations, as identified by EBSD orientation measurements, and using the image quality maps were used to quantify the number of twins present in the scanned areas of the samples. The image quality method yielded a distinct positive correlation between the twin area density and deformation, but the orientation measurements were unreliable in quantifying twin density in these structures. Quantitative analysis of the twin fraction is limited from orientation information because of the poor spatial resolution of EBSD in relation to the twin thickness. The EBSD orientation maps created for a thin foil sample showed some improvement in the resolution of the twins, but not enough to be significant. Measurements of the twins in the transmission electron microscopy micrographs yielded an average thickness of 23 nm, which is near the resolution capabilities of EBSD on this material for the instrumentation used. Electron channeling contrast imaging performed on one bulk tensile specimen of 0.34 true strain, using a method of controlled diffraction, yielded several images of twinning, dislocation structures and strain fields. A twin thickness of 66 nm was measured by the same method used for the transmission electron microscopy measurement. It is apparent that the results obtain by electron channeling contrast imaging were better than those by EBSD but did not capture all information on the twin boundaries such as was observed by transmission electron microscopy. - Highlights: • Performed tensile tests to assess mechanical performance of TWIP alloy • Analyzed tensile specimens using EBSD, TEM, and ECCI • EBSD showed that most twinning occurred at or near the < 111 >//TA orientation. • EBSD, TEM and ECCI were used to measure average twin density. • Compared spatial resolution of EBSD, ECCI and TEM for the instrumentation used.

Patterson, Erin E., E-mail: erin.diedrich@yahoo.com [School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920 (United States); Field, David P., E-mail: dfield@wsu.edu [School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920 (United States); Zhang, Yudong, E-mail: yudong.zhang@univ-metz.fr [LEM3, CNRS UMP 7239, Université de Lorraine, 57045 Metz (France); Laboratory of Excellence on Design of Alloy Metals for low mAss Structures (DAMAS), Université de Lorraine, 57045 Metz (France)

2013-11-15

460

LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on G  

NASA Technical Reports Server (NTRS)

LDEF (Prelaunch), AO175 : Evaluation of Long-Duration Exposure to the Natural Space Environment on Graphite-Polyimide and Graphite-Epoxy Mechanical Properties, Tray A07 The Graphite-Polyimide and Graphite-Epoxy Mechanical Properties experiment fills two (2) three (3) inch deep peripheral trays, A01 and A07. The experiment in the A07 experiment tray, shown in this photograph, consist of three (3) Graphite-Polyimide laminate panels and associated mounting hardware. Each panel occupies one third (1/3) of the LDEF experiment tray; a PMR-15 precured graphite-polyimide panel (T40T30060-009) in the right one third section, a F-178/T300 cocured graphite-polyimide panel (T40T30060-005) in the center one third section and a F-178/T300 precured graphite-polyimide panel (T40T30060-001) is in the left one third section of the tray. The panels are held in place with aluminum strips and non-magnetic stainless steel fasteners. The aluminum strips are covered with a dull gold coating over most of the exposed surface. The coating has been scraped from the aluminum mounting strip near the upper left tray corner. The mounting system, designed to allow for differential thermal expansion, minimizes the risk of inducing high stresses into the test panels. PMR-15 Graphite-Polyimide Panel (precured) - The PMR-15 graphite-polyimide laminated panel (T40T30060-009) is a uniform dark brown with a yellow identification number. The panel has several off-white marks in the lower right corner and light grayish-brown discolorations can be seen behind the identification number and behind the off-white marks. F-178/T300 Graphite-Polyimide Panel (cocured) - The F178/T300 graphite-polyimide laminated panel (T40T30060-005) is also a dark brown with a yellow identification number and small offwhite marks in the lower right corner. F-178/300 Graphite-Polyimide Panel (precured) - The F178/300 graphite-polyimide laminated panel (T40T30060-001) is a dark brown color with a yellow identification number and small offwhite marks in the panels upper left corner. The panel appears to have a lighter brown area along its vertical center that extends from the bottom to the top of the panel.

1984-01-01

461

Determination of the thermo-optic coefficient dn/dT of ytterbium doped ceramics (Sc2O3, Y2O3, Lu2O3, YAG), crystals (YAG, CaF2) and neodymium doped phosphate glass at cryogenic temperature  

NASA Astrophysics Data System (ADS)

In this paper, we report the measurements of the thermal expansion coefficient and the thermo-optic coefficient dn/dT for the ytterbium doped cubic sesquioxides (Sc2O3, Y2O3, Lu2O3) at cryogenic temperature. These materials appear to have very interesting properties for setting up high average power laser chains useful for plasma physics and for inertial fusion energy drivers. Measurements have also been done on YAG ceramic and crystal, CaF2 crystal, and neodymium phosphate glass (Hoya, LHG-8).

Cardinali, V.; Marmois, E.; Le Garrec, B.; Bourdet, G.

2012-04-01

462

Structure and NIR-luminescence of ytterbium(III) beta-diketonate complexes with 5-nitro-1,10-phenanthroline ancillary ligand: assessment of chain length and fluorination impact.  

PubMed

Seven new tris(?-diketonear-nate)ytterbium(III) complexes with the general formula [Yb(?-diketonate)3(5NO2phen)] (where the ?-diketone is either 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione, 4,4,4-trifluoro-1-(2-furyl)-1,3-butanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione, 1,1,1,5,5,6,6,7,7,7-decafluoro-2,4-heptanedione, 2,4-hexanedione or 2,6-dimethyl-3,5-heptanedione, and 5NO2phen = 5-nitro-1,10-phenanthroline) were synthesized and characterized by elemental analysis, attenuated total reflectance Fourier transform infrared spectroscopy and photoluminescence spectroscopy. Single crystal X-ray structures have been determined for three fluorinated complexes and ground state geometries of the other four complexes have been predicted using the Sparkle/PM6 model. These experimental structures and those designed by semi-empirical models reveal octacoordination around the Yb(3+) ion. Photoluminescence studies and lifetime measurements show that the increase in the fluorinated ?-diketonate chain length is associated with a decrease in Yb(3+) luminescence intensity of the (2)F5/2?(2)F7/2 transition at around 980 nm and the (2)F5/2 excited state lifetime, while the ligand lifetime value remains almost unaffected. Finally, fluorination of the ligands is only advised when the complexes are to be used for co-doping with isostructural Er(3+) complexes for optical amplifiers, since it leads to a slight decrease in luminescence intensity for the same ?-diketonate chain length. PMID:23900403

Martín-Ramos, Pablo; Pereira da Silva, Pedro S; Lavín, Victor; Martín, Inocencio R; Lahoz, Fernando; Chamorro-Posada, Pedro; Silva, Manuela Ramos; Martín-Gil, Jesús

2013-10-01

463

Inclusive Soft Pion Production from 12.3 and 17.5 GeV/c Protons on Be, Cu and Au  

E-print Network

Differential cross-sections are presented for the inclusive production of charged pions in the momentum range 0.1 to 1.2 GeV/c in interactions of 12.3 and 17.5 GeV/c protons with Be, Cu, and Au targets. The measurements were made by Experiment 910 at the Alternating Gradient Synchrotron in Brookhaven National Laboratory. The cross-sections are presented as a function of pion total momentum and production polar angle $\\theta$ with respect to the beam.

I. Chemakin; V. Cianciolo; B. A. Cole; R. C. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. G. Kirk; N. Maeda; R. L. McGrath; S. Mioduszewski; D. Morrison; M. Moulson; M. N. Namboodiri; R. B. Palmer; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; S. Sorensen; J. H. Thomas; Y. Torun; D. L. Winter; X. Yang; W. A. Zajc; Y. Zhang

2001-08-06

464

Pion Production by Protons on a Thin Beryllium Target at 6.4, 12.3, and 17.5 GeV/c Incident Proton Momenta  

E-print Network

An analysis of inclusive pion production in proton-beryllium collisions at 6.4, 12.3, and 17.5 GeV/c proton beam momentum has been performed. The data were taken by Experiment 910 at the Alternating Gradient Synchrotron at the Brookhaven National Laboratory. The differential $\\pi^+$ and $\\pi^-$ production cross sections ($d^2\\sigma/dpd\\Omega$) are measured up to 400 mRad in $\\theta_{\\pi}$ and up to 6 GeV/c in $p_{\\pi}$. The measured cross section is fit with a Sanford-Wang parameterization.

Cianciolo, V; Fernow, R C; Frawley, A D; Gilkes, M; Gushue, S; Hartouni, E P; Hiejima, H; Justice, M; Kang, J H; Kirk, H G; Link, J M; Maeda, N; McGrath, R L; Mioduszewski, S; Monroe, J; Morrison, D; Moulson, M; Namboodiri, M N; Rai, G; Read, K; Remsberg, L; Rosati, M; Shin, Y; Soltz, R A; Sorel, M; Sørensen, S; Thomas, J H; Torun, Y; Winter, D L; Yang, X; Zajc, W A; Zhang, Y

2007-01-01

465

Pion Production by Protons on a Thin Beryllium Target at 6.4, 12.3, and 17.5 GeV/c Incident Proton Momenta  

E-print Network

An analysis of inclusive pion production in proton-beryllium collisions at 6.4, 12.3, and 17.5 GeV/c proton beam momentum has been performed. The data were taken by Experiment 910 at the Alternating Gradient Synchrotron at the Brookhaven National Laboratory. The differential $\\pi^+$ and $\\pi^-$ production cross sections ($d^2\\sigma/dpd\\Omega$) are measured up to 400 mRad in $\\theta_{\\pi}$ and up to 6 GeV/c in $p_{\\pi}$. The measured cross section is fit with a Sanford-Wang parameterization.

E910 Collaboration; I. Chemakin; V. Cianciolo; B. A. Cole; R. C. Fernow; A. D. Frawley; M. Gilkes; S. Gushue; E. P. Hartouni; H. Hiejima; M. Justice; J. H. Kang; H. G. Kirk; J. M. Link; N. Maeda; R. L. McGrath; S. Mioduszewski; J. Monroe; D. Morrison; M. Moulson; M. N. Namboodiri; G. Rai; K. Read; L. Remsberg; M. Rosati; Y. Shin; R. A. Soltz; M. Sorel; S. Sorensen; J. H. Thomas; Y. Torun; D. L. Winter; X. Yang; W. A. Zajc; Y. Zhang

2008-03-10

466

Attenuated West Nile Virus Mutant NS1130-132QQA/175A/207A Exhibits Virus-Induced Ultrastructural Changes and Accumulation of Protein in the Endoplasmic Reticulum.  

PubMed

We have previously shown that ablation of the three N-linked glycosylation sites in the West Nile virus NS1 protein completely attenuates mouse neuroinvasiveness (?1,000,000 PFU). Here, we compared the replication of the NS1130-132QQA/175A/207A mutant to that of the parental NY99 strain in monkey kidney Vero cells. The results suggest that the mechanism of attenuation is a lack of NS1 glycosylation, which blocks efficient replication, maturation, and NS1 secretion from the endoplasmic reticulum and results in changes to the virus-induced ultrastructure. PMID:25392222

Whiteman, Melissa C; Popov, Vsevolod; Sherman, Michael B; Wen, Julie; Barrett, Alan D T

2015-01-15

467

Comprehensive Behavioral and Molecular Characterization of a New Knock-In Mouse Model of Huntington’s Disease: zQ175  

PubMed Central

Huntington’s disease (HD) is an autosomal dominant neurodegenerative disorder characterized by motor, cognitive and psychiatric manifestations. Since the mutation responsible for the disease was identified as an unstable expansion of CAG repeats in the gene encoding the huntingtin protein in 1993, numerous mouse models of HD have been generated to study disease pathogenesis and evaluate potential therapeutic approaches. Of these, knock-in models best mimic the human condition from a genetic perspective since they express the mutation in the appropriate genetic and protein context. Behaviorally, however, while some abnormal phenotypes have been detected in knock-in mouse models, a model with an earlier and more robust phenotype than the existing models is required. We describe here for the first time a new mouse line, the zQ175 knock-in mouse, derived from a spontaneous expansion of the CAG copy number in our CAG 140 knock-in colony [1]. Given the inverse relationship typically observed between age of HD onset and length of CAG repeat, since this new mouse line carries a significantly higher CAG repeat length it was expected to be more significantly impaired than the parent line. Using a battery of behavioral tests we evaluated both heterozygous and homozygous zQ175 mice. Homozygous mice showed motor and grip strength abnormalities with an early onset (8 and 4 weeks of age, respectively), which were followed by deficits in rotarod and climbing activity at 30 weeks of age and by cognitive deficits at around 1 year of age. Of particular interest for translational work, we also found clear behavioral deficits in heterozygous mice from around 4.5 months of age, especially in the dark phase of the diurnal cycle. Decreased body weight was observed in both heterozygotes and homozygotes, along with significantly reduced survival in the homozygotes. In addition, we detected an early and significant decrease of striatal gene markers from 12 weeks of age. These data suggest that the zQ175 knock-in line could be a suitable model for the evaluation of therapeutic approaches and early events in the pathogenesis of HD. PMID:23284626

Menalled, Liliana B.; Kudwa, Andrea E.; Miller, Sam; Fitzpatrick, Jon; Watson-Johnson, Judy; Keating, Nicole; Ruiz, Melinda; Mushlin, Richard; Alosio, William; McConnell, Kristi; Connor, David; Murphy, Carol; Oakeshott, Steve; Kwan, Mei; Beltran, Jose; Ghavami, Afshin; Brunner, Dani; Park, Larry C.; Ramboz, Sylvie; Howland, David

2012-01-01

468

Inverse magnetocaloric effect in Mn{sub 2}NiGa and Mn{sub 1.75}Ni{sub 1.25}Ga magnetic shape memory alloys  

SciTech Connect

Inverse magnetocaloric effect is demonstrated in Mn{sub 2}NiGa and Mn{sub 1.75}Ni{sub 1.25}Ga magnetic shape memory alloys. The entropy change at the martensite transition is larger in Mn{sub 1.75}Ni{sub 1.25}Ga, and it increases linearly with magnetic field in both the specimens. Existence of inverse magnetocaloric effect is consistent with the observation that magnetization in the martensite phase is smaller than the austenite phase. Although the Mn content is smaller in Mn{sub 1.75}Ni{sub 1.25}Ga, from neutron diffraction, we show that the origin of inverse magnetocaloric effect is the antiferromagnetic interaction between the Mn atoms occupying inequivalent sites.

Singh, Sanjay, E-mail: sanju8419@gmail.com; Barman, S. R. [UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452001 (India); Esakki Muthu, S.; Arumugam, S. [Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620024 (India); Senyshyn, A. [Forschungsneutronenquelle Heinz Maier-Leibnitz FRM-II, Technische Universität München, Lichtenbergstrasse 1, 85747 Garching b. München (Germany); Rajput, P. [European Synchrotron Radiation Facility, 6 rue Jules Horowitz, F-38000 Grenoble (France); Suard, E. [Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9 (France)

2014-02-03

469

Lack of Effect of Lowering LDL Cholesterol on Cancer: Meta-Analysis of Individual Data from 175,000 People in 27 Randomised Trials of Statin Therapy  

PubMed Central

Background Statin therapy reduces the risk of occlusive vascular events, but uncertainty remains about potential effects on cancer. We sought to provide a detailed assessment of any effects on cancer of lowering LDL cholesterol (LDL-C) with a statin using individual patient records from 175,000 patients in 27 large-scale statin trials. Methods and Findings Individual records of 134,537 participants in 22 randomised trials of statin versus control (median duration 4.8 years) and 39,612 participants in 5 trials of more intensive versus less intensive statin therapy (median duration 5.1 years) were obtained. Reducing LDL-C with a statin for about 5 years had no effect on newly diagnosed cancer or on death from such cancers in either the trials of statin versus control (cancer incidence: 3755 [1.4% per year [py

2012-01-01

470

Will this marriage work: California unites utilities and solar - for better or worse. [PVC financing test of 175,000 solar water heaters over 3 yrs  

SciTech Connect

The California Public Utility Commission (PUC) is financing the country's largest utility-solar program, one which will test 175,000 solar water heaters in homes over a three-year period. The controversial program was prompted because traditional financing methods and solar tax credits were not meeting the state's goal for solar applications. Customer acceptance was further slowed by a lack of information. The PUC responded by setting up a program to force utility financing to allow residential consumers to conveniently buy a solar hot-water system. Targeted for a range of neighborhoods and income groups, the program offers free delivery and installation and one of four payback plans. Four major utilities will participate in the demonstration. Opponents to the plan predict power shortages unless utilities spend the money for new plant construction, point to the conflict of interest it represents for investor-owned utilities, and object to having the utilities in control of solar energy. (DCK)

Woolson, A.

1980-03-01

471

Effect of casing treatment of overall performance of axial-flow transonic fan stage with pressure ratio of 1.75 and tip solidity of 1.5  

NASA Technical Reports Server (NTRS)

The effect of a number of casing treatments on the overall performance of a 1.75-pressure-ratio, 423-m/sec-tip-speed fan stage was evaluated. The skewed slot configuration with short-open slots over the midportion of the rotor had a stall margin of 23.5 percent, while the solid casing had a stall margin of 15.0 percent. The skewed slot configuration with long open slots extending ahead of and over portion of rotor displaced the stall line to the lowest flow at all speeds tested. At design speed, the peak efficiency for the long, forward open slots was 1 point less than that for the short midopen slots and 3 points less than that for the solid casing.

Osborn, W. M.; Moore, R. D.

1977-01-01

472

X-ray structure at 1.75 resolution of a norovirus 3C protease linked to an active site-directed peptide inhibitor  

SciTech Connect

Noroviruses are recognized universally as the most important cause of human epidemic non-bacterial gastroenteritis. Viral replication requires a 3C cysteine protease that cleaves a 200kDa viral polyprotein into its constituent functional proteins. Here we describe the X-ray structure of the Southampton norovirus 3C protease (SV3CP) bound to an active site-directed peptide inhibitor (MAPI) which has been refined at 1.75 resolution, following initial MAD phasing with a selenomethionine derivative. The inhibitor, acetyl-Glu-Phe-Gln-Leu-Gln-X, based on a 3C protease cleavage recognition sequences in the 200kDa polyprotein substrate, reacts covalently through its propenylethylester group (X) with the active site nucleophile, Cys 139. The 3C protease-inhibitor structure permits, for the first time, the identification of substrate recognition and binding groups and provides important new information for the development of antiviral prophylactics.

Cooper, Jon [University of Southampton, England; Coates, Leighton [ORNL; Hussey, Robert [University of Southampton, England

2010-01-01

473

Semi-inclusive lambda and K(S) production in p-Au collisions at 17.5 GeV/c  

PubMed

The first detailed measurements of the centrality dependence of strangeness production in p-A collisions are presented. Lambda and K(S) dn/dy distributions from 17.5 GeV/ c p-Au collisions are shown as a function of "grey" track multiplicity and the estimated number of collisions, nu, made by the proton. The nu dependence of the Lambda yield deviates from a scaling of p-p data by the number of participants, increasing faster than this scaling for nu

Chemakin; Cianciolo; Cole; Fernow; Frawley; Gilkes; Gushue; Hartouni; Hiejima; Justice; Kang; Kirk; Maeda; McGrath; Mioduszewski; Morrison; Moulson; Namboodiri; Rai; Read; Remsberg; Rosati; Shin; Soltz; Sorensen; Thomas

2000-12-01

474

Hole mobility enhancement of Cu-deficient Cu{sub 1.75}Zn(Sn{sub 1?x}Al{sub x})Se{sub 4} bulks  

SciTech Connect

Cu-deficient Cu{sub 1.75}ZnSn{sub 1?x}Al{sub x}Se{sub 4} (x=0–0.6) bulks were prepared by a liquid-phase reactive sintering method at 600 {sup °}C with soluble sintering aids of Sb{sub 2}S{sub 3} and Te. Defect chemistry was studied by measuring electrical properties of Al-doped CZTSe as a function of dopant concentration. Al-CZTSe pellets at x=0.4 with electrical conductivity of 57.2 S cm{sup ?1} showed the highest hole mobility of 32.5 cm{sup 2} V{sup ?1} s{sup ?1}. The high mobility is mainly contributed from the low atomic scattering factor of Al. The high carrier concentration and slightly changed lattice parameter of Al-CZTSe are related to the types of its defects. - Graphical abstract: The controls in electrical properties and the changes in lattice parameters of Cu-deficient Cu{sub 2}ZnSnSe{sub 4} by doping Al{sup 3+} on the Sn{sup 4+} site. Display Omitted - Highlights: • Cu-deficient Cu{sub 1.75}Zn(Sn{sub 1?x}Al{sub x})Se{sub 4} was prepared by liquid-phase sintering at 600 °C. • Sintering aids of Sb{sub 2}S{sub 3} and Te were used for reactive sintering. • Al-CZTSe at x=0.4 showed the extremely high mobility of 32.5 cm{sup 2} V{sup ?1} s{sup ?1}. • Al-CZTSe reached large grains of 2?3 ?m, while it was <1.0 ?m for the undoped. • Electrical properties of Al-CZTSe pellets changed with the Al content.

Kuo, Dong-Hau, E-mail: dhkuo@mail.ntust.edu.tw; Tsega, Moges

2013-10-15

475

Reversible mutarotation in a macrocyclic ytterbium complex.  

PubMed

M40 is a four-fold symmetry macrocyclic ligand endowed with axial and central chiral elements, all of R configuration. It promptly binds late lanthanides (Yb(III) and Lu(III) ) yielding a negative helicity, as witnessed by NIR-electronic circular dichroism. In the course of a few hours, a new conformation of the complex takes over, which has opposite helicity and allows for a dynamic free-bound equilibrium. Upon slow solvent evaporation, the original conformation is retrieved and the whole dynamic process can be started again, as in a sandclock, allowing one to envisage applications as a time-marker chiral switch. PMID:21207628

Ballistreri, Francesco P; Gentile, Salvatore; Pappalardo, Andrea; Tomaselli, Gaetano A; Pradhan, Sanghamitra; Di Bari, Lorenzo

2011-01-01

476

Calculation of parity nonconservation in neutral ytterbium  

SciTech Connect

We use configuration interaction and many-body perturbation theory techniques to calculate spin-independent and spin-dependent parts of the parity-nonconserving amplitudes of the transitions between the 6s{sup 2} {sup 1}S{sub 0} ground state and the 6s5d {sup 3}D{sub 1} excited state of {sup 171}Yb and {sup 173}Yb. The results are presented in a form convenient for extracting spin-dependent interaction constants (such as anapole moment) from the measurements.

Dzuba, V. A.; Flambaum, V. V. [School of Physics, University of New South Wales, Sydney, New South Wales 2052 (Australia)

2011-04-15

477

Genetic Deletion of Transglutaminase 2 Does Not Rescue the Phenotypic Deficits Observed in R6/2 and zQ175 Mouse Models of Huntington's Disease  

PubMed Central

Huntington's disease (HD) is an autosomal dominant, progressive neurodegenerative disorder caused by expansion of CAG repeats in the huntingtin gene. Tissue transglutaminase 2 (TG2), a multi-functional enzyme, was found to be increased both in HD patients and in mouse models of the disease. Furthermore, beneficial effects have been reported from the genetic ablation of TG2 in R6/2 and R6/1 mouse lines. To further evaluate the validity of this target for the treatment of HD, we examined the effects of TG2 deletion in two genetic mouse models of HD: R6/2 CAG 240 and zQ175 knock in (KI). Contrary to previous reports, under rigorous experimental conditions we found that TG2 ablation had no effect on either motor or cognitive deficits, or on the weight loss. In addition, under optimal husbandry conditions, TG2 ablation did not extend R6/2 lifespan. Moreover, TG2 deletion did not change the huntingtin aggregate load in cortex or striatum and did not decrease the brain atrophy observed in either mouse line. Finally, no amelioration of the dysregulation of striatal and cortical gene markers was detected. We conclude that TG2 is not a valid therapeutic target for the treatment of HD. PMID:24955833

Menalled, Liliana B.; Kudwa, Andrea E.; Oakeshott, Steve; Farrar, Andrew; Paterson, Neil; Filippov, Igor; Miller, Sam; Kwan, Mei; Olsen, Michael; Beltran, Jose; Torello, Justin; Fitzpatrick, Jon; Mushlin, Richard; Cox, Kimberly; McConnell, Kristi; Mazzella, Matthew; He, Dansha; Osborne, Georgina F.; Al-Nackkash, Rand; Bates, Gill P.; Tuunanen, Pasi; Lehtimaki, Kimmo; Brunner, Dani; Ghavami, Afshin; Ramboz, Sylvie; Park, Larry; Macdonald, Douglas; Munoz-Sanjuan, Ignacio; Howland, David

2014-01-01

478

1.75 h {sup -1} kpc SEPARATION DUAL ACTIVE GALACTIC NUCLEI AT z = 0.36 IN THE COSMOS FIELD  

SciTech Connect

We present strong evidence for dual active galactic nuclei (AGNs) in the z = 0.36 galaxy COSMOS J100043.15+020637.2. COSMOS Hubble Space Telescope (HST) imaging of the galaxy shows a tidal tail, indicating that the galaxy recently underwent a merger, as well as two bright point sources near the galaxy's center. The luminosities of these sources (derived from the HST image) and their emission line flux ratios (derived from Keck/DEIMOS slit spectroscopy) suggest that both are AGNs and not star-forming regions or supernovae. Observations from zCOSMOS, the Sloan Digital Sky Survey, XMM-Newton, Spitzer, and the Very Large Array fortify the evidence for AGN activity. With HST imaging we measure a projected spatial offset between the two AGNs of 1.75 {+-} 0.03 h {sup -1} kpc, and with DEIMOS we measure a 150 {+-} 40 km s{sup -1} line-of-sight velocity offset between the two AGNs. Combined, these observations provide substantial evidence that COSMOS J100043.15+020637.2 is a merger-remnant galaxy with dual AGNs.

Comerford, Julia M.; Davis, Marc [Astronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720 (United States); Griffith, Roger L.; Stern, Daniel [Jet Propulsion Laboratory, California Institute of Technology, MS 169-327, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Gerke, Brian F. [Kavli Institute for Particle Astrophysics and Cosmology, M/S 29, Stanford Linear Accelerator Center, 2575 Sand Hill Rd., Menlo Park, CA 94725 (United States); Cooper, Michael C. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Newman, Jeffrey A. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States)

2009-09-01

479

Light-ion production in the interaction of 175 MeV quasi-mono-energetic neutrons with iron and with bismuth  

E-print Network

Nuclear data for neutron-induced reactions in the intermediate energy range of 20 to 200 MeV are of great importance for the development of nuclear reaction codes since little data exist in that range. Also several different applications benefit from such data, notably accelerator-driven incineration of nuclear waste. The Medley setup was used for a series of measurements of p, d, t, $^3$He and $\\alpha$-particle production by 175 MeV quasi-mono-energetic neutrons on various target nuclei. The measurements were performed at the The Svedberg Laboratory in Uppsala, Sweden. Eight detector telescopes placed at angles between 20$^\\circ$ and 160$^\\circ$ were used. Medley uses the $\\Delta E$-$\\Delta E$-$E$ technique to discriminate among the particle types and is able to measure double-differential cross sections over a wide range of particle energies. This paper briefly describes the experimental setup, summarizes the data analysis and reports on recent changes in the previously reported preliminary data set on bismuth. Experimental data are compared with INCL4.5-Abla07, MCNP6 using CEM03.03, TALYS and PHITS model calculations as well as with nuclear data evaluations. The models agree fairly well overall but in some cases systematic differences are found.

R. Bevilacqua; K. Jansson; S. Pomp; P. Andersson; J. Blomgren; C. Gustavsson; A. Hjalmarsson; V. D. Simutkin; M. Österlund; A. J. Koning; A. V. Prokofiev; M. Hayashi; S. Hirayama; Y. Naitou; Y. Watanabe; U. Tippawan; S. G. Mashnik; L. M. Kerby; F. -R. Lecolley; N. Marie; J. -C. David; S. Leray

2014-11-12

480

Design, synthesis and biological evaluation of a class of bioisosteric oximes of the novel dual peroxisome proliferator-activated receptor ?/? ligand LT175.  

PubMed

The effects resulting from the introduction of an oxime group in place of the distal aromatic ring of the diphenyl moiety of LT175, previously reported as a PPAR?/? dual agonist, have been investigated. This modification allowed the identification of new bioisosteric ligands with fairly good activity on PPAR? and fine-tuned moderate activity on PPAR?. For the most interesting compound (S)-3, docking studies in PPAR? and PPAR? provided a molecular explanation for its different behavior as full and partial agonist of the two receptor isotypes, respectively. A further investigation of this compound was carried out performing gene expression studies on HepaRG cells. The results obtained allowed to hypothesize a possible mechanism through which this ligand could be useful in the treatment of metabolic disorders. The higher induction of the expression of some genes, compared to selective agonists, seems to confirm the importance of a dual PPAR?/? activity which probably involves a synergistic effect on both receptor subtypes. PMID:25497132

Piemontese, Luca; Fracchiolla, Giuseppe; Carrieri, Antonio; Parente, Mariagiovanna; Laghezza, Antonio; Carbonara, Giuseppe; Sblano, Sabina; Tauro, Marilena; Gilardi, Federica; Tortorella, Paolo; Lavecchia, Antonio; Crestani, Maurizio; Desvergne, Béatrice; Loiodice, Fulvio

2015-01-27

481

WASP-104b and WASP-106b: two transiting hot Jupiters in 1.75-day and 9.3-day orbits  

NASA Astrophysics Data System (ADS)

We have used the WASP survey to discover two exoplanetary systems, each consisting of a Jupiter-sized planet transiting an 11th-magnitude (V) main-sequence star. WASP-104b orbits its star in 1.75 d, whereas WASP-106b has the fourth-longest orbital period of any planet discovered by means of transits observed from the ground, orbiting every 9.29 d. Each planet is more massive than Jupiter (WASP-104b has a mass of 1.27 ± 0.05MJup, while WASP-106b has a mass of 1.93 ± 0.08MJup). Both planets are just slightly larger than Jupiter, with radii of 1.14 ± 0.04 and 1.09 ± 0.04RJup for WASP-104 and WASP-106, respectively. No significant orbital eccentricity is detected in either system, and while this is not surprising in the case of the short-period WASP-104b, it is interesting in the case of WASP-106b, because many otherwise similar planets are known to have eccentric orbits. Table 1 is available in electronic form at http://www.aanda.orgThe table of photometry is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/570/A64

Smith, A. M. S.; Anderson, D. R.; Armstrong, D. J.; Barros, S. C. C.; Bonomo, A. S.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Delrez, L.; Faedi, F.; Gillon, M.; Gómez Maqueo Chew, Y.; Hébrard, G.; Jehin, E.; Lendl, M.; Louden, T. M.; Maxted, P. F. L.; Montagnier, G.; Neveu-VanMalle, M.; Osborn, H. P.; Pepe, F.; Pollacco, D.; Queloz, D.; Rostron, J. W.; Segransan, D.; Smalley, B.; Triaud, A. H. M. J.; Turner, O. D.; Udry, S.; Walker, S. R.; West, R. G.; Wheatley, P. J.

2014-10-01

482

The Risks and Benefits of Long-term Use of Hydroxyurea in Sickle Cell Anemia: A 17.5 Year Follow-Up  

PubMed Central

A randomized, controlled clinical trial established the efficacy and safety of short-term use of hydroxyurea in adult sickle cell anemia. To examine the risks and benefits of long-term hydroxyurea usage, patients in this trial were followed for 17.5 years during which they could start or stop hydroxyurea. The purpose of this follow-up was to search for adverse outcomes and estimate mortality. For each outcome and for mortality, exact 95% confidence intervals were calculated, or tests were conducted at ? = 0.05 level (p-value <0.05 for statistical significance). Although the death rate in the overall study cohort was high (43.1%; 4.4 per 100 person-years), mortality was reduced in individuals with long-term exposure to hydroxyurea. Survival curves demonstrated a significant reduction in deaths with long-term exposure. Twenty-four percent of deaths were due to pulmonary complications; 87.1% occurred in patients who never took hydroxyurea or took it for <5 years. Stroke, organ dysfunction, infection and malignancy were similar in all groups. Our results, while no longer the product of a randomized study because of the ethical concerns of withholding an efficacious treatment, suggest that long-term use of hydroxyurea is safe and might decrease mortality. PMID:20513116

Steinberg, MH; McCarthy, WF; Castro, O; Ballas, SK; Armstrong, FD; Smith, W; Ataga, K; Swerdlow, P; Kutlar, A; DeCastro, L; Waclawiw, MA

2010-01-01

483

WASP-104b and WASP-106b: two transiting hot Jupiters in 1.75-day and 9.3-day orbits  

E-print Network

We report the discovery from the WASP survey of two exoplanetary systems, each consisting of a Jupiter-sized planet transiting an 11th magnitude (V) main-sequence star. WASP-104b orbits its star in 1.75 d, whereas WASP-106b has the fourth-longest orbital period of any planet discovered by means of transits observed from the ground, orbiting every 9.29 d. Each planet is more massive than Jupiter (WASP-104b has a mass of $1.27 \\pm 0.05~\\mathrm{M_{Jup}}$, while WASP-106b has a mass of $1.93 \\pm 0.08~\\mathrm{M_{Jup}}$). Both planets are just slightly larger than Jupiter, with radii of $1.14 \\pm 0.04$ and $1.09 \\pm 0.04~\\mathrm{R_{Jup}}$ for WASP-104 and WASP-106 respectively. No significant orbital eccentricity is detected in either system, and while this is not surprising in the case of the short-period WASP-104b, it is interesting in the case of WASP-106b, because many otherwise similar planets are known to have eccentric orbits.

Smith, A M S; Armstrong, D J; Barros, S C C; Bonomo, A S; Bouchy, F; Brown, D J A; Cameron, A Collier; Delrez, L; Faedi, F; Gillon, M; Chew, Y Gómez Maqueo; Hébrard, G; Jehin, E; Lendl, M; Louden, T M; Maxted, P F L; Montagnier, G; Neveu-VanMalle, M; Osborn, H; Pepe, F; Pollacco, D; Queloz, D; Rostron, J W; Segransan, D; Smalley, B; Triaud, A H M J; Turner, O D; Udry, S; Walker, S R; West, R G; Wheatley, P J

2014-01-01

484

IDCS J1426.5+3508: SUNYAEV-ZEL'DOVICH MEASUREMENT OF A MASSIVE INFRARED-SELECTED CLUSTER AT z = 1.75  

SciTech Connect

We report 31 GHz CARMA observations of IDCS J1426.5+3508, an infrared-selected galaxy cluster at z = 1.75. A Sunyaev-Zel'dovich (SZ) decrement is detected toward this cluster, indicating a total mass of M{sub 200,m} = (4.3 {+-} 1.1) Multiplication-Sign 10{sup 14} M{sub Sun} in agreement with the approximate X-ray mass of {approx}5 Multiplication-Sign 10{sup 14} M{sub Sun }. IDCS J1426.5+3508 is by far the most distant cluster yet detected via the SZ effect, and the most massive z {>=} 1.4 galaxy cluster found to date. Despite the mere {approx}1% probability of finding it in the 8.82 deg{sup 2} IRAC Distant Cluster Survey, IDCS J1426.5+3508 is not completely unexpected in {Lambda}CDM once the area of large, existing surveys is considered. IDCS J1426.5+3508 is, however, among the rarest, most extreme clusters ever discovered and indeed is an evolutionary precursor to the most massive known clusters at all redshifts. We discuss how imminent, highly sensitive SZ experiments will complement infrared techniques for statistical studies of the formation of the most massive galaxy clusters in the z > 1.5 universe, including potential precursors to IDCS J1426.5+3508.

Brodwin, M. [Department of Physics and Astronomy, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110 (United States); Gonzalez, A. H.; Fedeli, C.; Gettings, D.; Mancone, C. [Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States); Stanford, S. A.; Zeimann, G. [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Plagge, T.; Carlstrom, J. E.; Leitch, E. M. [Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637 (United States); Marrone, D. P. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Dey, A.; Jannuzi, B. T. [NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Eisenhardt, P. R.; Stern, D. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Joy, M. [Department of Space Science, VP62, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Snyder, G. F. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA (United States)

2012-07-10

485

Bragg diffraction using a 100ps 17.5 keV x-ray backlighter and the Bragg Diffraction Imager  

SciTech Connect

A new diagnostic for measuring Bragg diffraction from a laser-driven crystal using a 100ps 17.5 kV x-ray backlighter source is designed and tested successfully at the Omega EP laser facility on static Mo and Ta single crystal samples using a Mo Ka backlighter. The Bragg Diffraction Imager (BDI) consists of a heavily shielded enclosure and a precisely positioned beam block, attached to the main enclosure by an Aluminum arm. Image plate is used as the x-ray detector. The diffraction lines from Mo and Ta <222> planes are clearly detected with a high signal-to-noise using the 17.5 keV and 19.6 keV characteristic lines generated by a petawatt-driven Mo foil. This technique will be applied to shock and ramp-loaded single crystals on the Omega EP laser. Pulsed x-ray diffraction of shock- and ramp-compressed materials is an exciting new technique that can give insight into the dynamic behavior of materials at ultra-high pressure not achievable by any other means to date. X-ray diffraction can be used to determine not only the phase and compression of the lattice at high pressure, but by probing the lattice compression on a timescale equal to the 3D relaxation time of the material, information about dislocation mechanics, including dislocation multiplication rate and velocity, can also be derived. Both Bragg, or reflection, and Laue, or transmission, diffraction have been developed for shock-loaded low-Z crystalline structures such as Cu, Fe, and Si using nano-second scale low-energy implosion and He-{alpha} x-ray backlighters. However, higher-Z materials require higher x-ray probe energies to penetrate the samples, such as in Laue, or probe deep enough into the target, as in the case of Bragg diffraction. Petawatt laser-generated K{alpha} x-ray backlighters have been developed for use in high-energy radiography of dense targets and other HED applications requiring picosecond-scale burst of hard x-rays. While short pulse lasers are very efficient at producing high-energy x-rays, the characteristic x-rays produced in these thin foil targets are superimposed on a broad bremsstrahlung background and can easily saturate a detector if careful diagnostic shielding and experimental geometry are not implemented. A new diagnostic has been designed to measure Bragg diffraction from laser-driven crystal targets using characteristic x-rays from a short-pulse laser backlighter on the Omega EP laser. The Bragg Diffraction Imager, or BDI, is a TIM-mounted instrument consisting of a heavily shielded enclosure made from 3/8-inch thick Heavymet (W-Fe-Ni alloy) and a precisely positioned beam bock, attached to the main enclosure by an Aluminum arm. The beam block is made of 1-inch thick, Al-coated Heavymet and serves to block the x-rays directly from the petawatt backlight, while allowing the diffraction x-rays from the crystal to pass to the enclosure. A schematic of the BDI is shown in Fig. 1a. Image plates are used as the x-ray detector and are loaded through the top of the diagnostic in an Aluminum, light-tight cartridge. The front of the enclosure can be fitted with various filters to maximize the diffraction signal-to-noise.

Maddox, B R; Park, H; Hawreliak, J; Comley, A; Elsholz, A; Van Maren, R; Remington, B A; Wark, J

2010-05-13

486

The importance of record length in estimating the magnitude of climatic changes: an example using 175 years of lake ice-out dates in New England  

USGS Publications Warehouse

Many studies have shown that lake ice-out (break-up) dates in the Northern Hemisphere are useful indicators of late winter/early spring climate change. Trends in lake ice-out dates in New England, USA, were analyzed for 25, 50, 75, 100, 125, 150, and 175 year periods ending in 2008. More than 100 years of ice-out data were available for 19 of the 28 lakes in this study. The magnitude of trends over time depends on the length of the period considered. For the recent 25-year period, there was a mix of earlier and later ice-out dates. Lake ice-outs during the last 50 years became earlier by 1.8 days/decade (median change for all lakes with adequate data). This is a much higher rate than for longer historical periods; ice-outs became earlier by 0.6 days/decade during the last 75 years, 0.4 days/ decade during the last 100 years, and 0.6 days/decade during the last 125 years. The significance of trends was assessed under the assumption of serial independence of historical ice-out dates and under the assumption of short and long term persistence. Hypolimnion dissolved oxygen (DO) levels are an important factor in lake eutrophication and coldwater fish survival. Based on historical data available at three lakes, 32 to 46 % of the interannual variability of late summer hypolimnion DO levels was related to ice-out dates; earlier ice-outs were associated with lower DO levels.

Hodgkins, Glenn A.

2013-01-01

487

High-field cyclotron resonance and impurity transition in n-type and p-type 3C-SiC at magnetic fields up to 175 T  

NASA Astrophysics Data System (ADS)

Magnetotransmission experiments have been carried out on 3C-SiC thin films grown on Si(100) substrates, using the combination of pulsed high magnetic fields up to 175 T generated by the single-turn coil technique and pulsed far-infrared radiations from a H2O (D2O) laser at photon energies up to 73.2 meV. In n-type 3C-SiC, two cyclotron-resonance (CR) peaks have been observed for B?k?<100> over a wide range of photon energy 10.4-53.8 meV, corresponding to the light- and heavy-mass valleys at the X points, i.e., m*t=(0.25+/-0.01)m0 and (m*tm*l)1/2=(0.41+/-0.01)m0. These values are in agreement with those of Kaplan et al. obtained from CR at low fields. This leads to the conclusion that the conduction band in 3C-SiC is very parabolic up to 53.8 meV, and that unlike GaP the effect of camel's-back structure is unobservable. A number of impurity transitions were observed at temperatures below 100 K with photon energies ranging from 34.4 to 73.2 meV. It was found that the observed lines originate from three different donor states which have different binding energies, Ed=19, 35, and 53 meV. The observation of hole CR was also made in p-type 3C-SiC. A broad but prominent peak was observed with an effective mass of 0.45m0, at temperatures around 210 K and at a wavelength of 119 ?m.

Kono, J.; Takeyama, S.; Yokoi, H.; Miura, N.; Yamanaka, M.; Shinohara, M.; Ikoma, K.

1993-10-01

488

New yellow-emitting Whitlockite-type structure Sr(1.75)Ca(1.25)(PO4)2:Eu(2+) phosphor for near-UV pumped white light-emitting devices.  

PubMed

New compound discovery is of interest in the field of inorganic solid-state chemistry. In this work, a whitlockite-type structure Sr1.75Ca1.25(PO4)2 newly found by composition design in the Sr3(PO4)2-Ca3(PO4)2 join was reported. Crystal structure and luminescence properties of Sr1.75Ca1.25(PO4)2:Eu(2+) were investigated, and the yellow-emitting phosphor was further employed in fabricating near-ultraviolet-pumped white light-emitting diodes (w-LEDs). The structure and crystallographic site occupancy of Eu(2+) in the host were identified via X-ray powder diffraction refinement using Rietveld method. The Sr1.75Ca1.25(PO4)2:Eu(2+) phosphors absorb in the UV-vis spectral region of 250-430 nm and exhibit an intense asymmetric broadband emission peaking at 518 nm under ?ex = 365 nm which is ascribed to the 5d-4f allowed transition of Eu(2+). The luminescence properties and mechanism are also investigated as a function of Eu(2+) concentration. A white LED device which is obtained by combining a 370 nm UV chip with commercial blue phosphor and the present yellow phosphor has been fabricated and exhibit good application properties. PMID:24773050

Ji, Haipeng; Huang, Zhaohui; Xia, Zhiguo; Molokeev, Maxim S; Atuchin, Victor V; Fang, Minghao; Huang, Saifang

2014-05-19

489

City Studio Activity Type Cals City Studio Activity Type Cals City Studio Activity Type Cals 07:30 08:15 Pilates Holistic 350 07:30 08:15 Yoga Holistic 175 12:00 12:45 Pilates Holistic 350  

E-print Network

:30 08:15 Pilates Holistic 350 07:30 08:15 Yoga Holistic 175 12:00 12:45 Pilates Holistic 350 11:30 12:15 Legs, Bums and Tums Tone 350 11:30 12:15 Zumba Dance 625 12:45 13:30 Yoga Holistic 175 12:15 13:45 Yoga Holistic 175 15:00 15:45 Ballet Dance 400 City Climbing Wall 15:00 16:00 Pilates Holistic 350 15

Evans, Paul

490

City Studio Activity Type Cals City Studio Activity Type Cals City Studio Activity Type Cals 07:30 08:15 Pilates Holistic 350 07:30 08:15 Yoga Holistic 175 12:00 12:45 Fat Burn Cardio 575  

E-print Network

:30 08:15 Pilates Holistic 350 07:30 08:15 Yoga Holistic 175 12:00 12:45 Fat Burn Cardio 575 11:30 12 13:00 13:45 Yoga Holistic 175 15:00 16:00 Ballet Fitness Tone 400 16:00 17:00 Legs, Bums and Tums:45 Fitness Yoga Holistic 175 20:00 21:00 Pilates Holistic 350 12:45 13:30 Zumba Dance 625 21:00 22

Evans, Paul

491

Ruling out unresolved binaries in five transitional disks. VLT/NACO deep 2.12 and 1.75 ?m narrow-band imaging  

NASA Astrophysics Data System (ADS)

Context. The presence of unresolved binaries on sub-arsecond scales could explain the existence of optically thin inner holes or gaps in circumstellar disks, which are commonly referred to as "transitional" or "cold" disks, and it is the first scenario to check before making any other assumptions. Aims: We aim at detecting the presence of companions inside the inner hole/gap region of a sample of five well known transitional disks using spatially-resolved imaging in the near-IR with the VLT/NACO/S13 camera, which probes projected distances from the primary of typically 0.1 to 7 arcsec. The sample includes the stars DoAr 21, HD 135344B (SAO 206462), HR 4796A, T Cha, and TW Hya, spanning ages of less than 1 to 10 Myr, spectral types of A0 to K7, and hole/gap outer radii of 4 to 100 AU. Methods: In order to enhance the contrast and to avoid saturation at the core of the point-spread function (PSF), we use narrow-band filters at 1.75 and 2.12 ?m. The "locally optimized combination of images" (LOCI) algorithm is applied for an optimal speckle noise removal and PSF subtraction, providing an increase of 0.5-1.5 mag in contrast over the classic method. Results: With the proviso that we could have missed companions owing to unfavorable projections, the VLT/NACO observations rule out the presence of unresolved companions down to an inner radius of about 0.1 arcsec from the primary in all five transitional disks and with a detection limit of 2 to 5 mag in contrast. In the disk outer regions the detection limits typically reach 8 to 9 mag in contrast and 4.7 mag for T Cha. Hence, the NACO images resolve part of the inner hole/gap region of all disks with the exception of TW Hya, for which the inner hole is only 4 AU. The 5? sensitivity profiles, together with a selected evolutionary model, allow to discard stellar companions within the inner hole/gap region of T Cha, and down to the substellar regime for HD 135344B and HR 4796A. DoAr 21 is the only object from the sample of five disks for which the NACO images are sensitive enough for a detection of objects less massive than ~13 MJup that is, potential giant planets or low-mass brown dwarfs at radii larger than ~76 AU (0.63 arcsec). Conclusions: These new VLT/NACO observations further constrain the origin of the inner opacity cavities to be owing to closer or lower-mass companions or other mechanisms such as giant planet formation, efficient grain growth, and photoevaporation (for DoAr 21 and HR 4796A).

Vicente, S.; Merín, B.; Hartung, M.; Bouy, H.; Huélamo, N.; Artigau, E.; Augereau, J.-C.; van Dishoeck, E.; Olofsson, J.; Oliveira, I.; Prusti, T.

2011-09-01

492

17O-NMR Knight shift study of the interplay between superconductivity and pseudogap in (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy  

NASA Astrophysics Data System (ADS)

We report systematic 17O-NMR measurements on the high-Tc cuprate (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy, for four different families (different x). Using Knight shift data, we show that the pseudogap opening temperature T* is much higher than Tc near optimal doping, unlike structurally similar YBCO. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to Tc. This puts constraints on the nature of the pseudogap and position of the quantum critical point inside the superconducting dome.

Cvitani?, T.; Pelc, D.; Požek, M.; Amit, E.; Keren, A.

2014-08-01

493

High-Tc Superconductivity with Tc = 52 K under Antiferromagnetic Order in Five-Layered Cuprate Ba2Ca4Cu5O10(F,O)2 with TN = 175 K: 19F- and Cu-NMR Studies  

Microsoft Academic Search

We report on the observation of high-Tc superconductivity (SC) emerging with the background of an antiferro magnetic (AFM) order in the five-layered cuprate Ba2Ca4Cu5O10(F,O)2 through 19F-NMR and zero-field Cu-NMR studies. The measurements of spectrum and nuclear spin--lattice relaxation rates 19 of 19F-NMR give convincing evidence for the AFM order taking place below TN = 175 K and for the onset

Sunao Shimizu; Shin-ichiro Tabata; Hidekazu Mukuda; Yoshio Kitaoka; Parasharam M. Shirage; Hijiri Kito; Akira Iyo

2011-01-01

494

Electrochemical and rate performance study of high-voltage lithium-richcomposition: Li1.2Mn0.525Ni0.175Co0.1O2  

SciTech Connect

We report electrochemical studies of high voltage cathodes composed of lithium rich layeredlayered material having the nominal composition Li1.2Mn0.525Ni0.175Co0.1O2, or equivalently 0.6Li[Li1/3Mn2/3]O2 0.4Li[Mn0.3Ni0.45Co0.25]O2. These aspects were investigated by cyclic voltammetry studies in conjunction with electrochemical impedance spectroscopy measurements to understand the redox reactions involving multiple transition metals and their capacity contribution at higher voltages, up to 4.9 V. Further, cathodes with 1.5 wt.% carbon nanofibers added to the Li1.2Mn0.525Ni0.175Co0.1O2 composite electrode showed stable reversible capacities of about 280 mAh g 1 when cycled to 4.9 V for more than 100 cycles, and almost a factor of two improvements in the rate performance compared to the electrode composition prepared using conventional composition (7.5% carbon black and 7.5% binder).

Martha, Surendra K [ORNL; Nanda, Jagjit [ORNL; Veith, Gabriel M [ORNL; Dudney, Nancy J [ORNL

2012-01-01

495

Anomalous behavior of Tc and pseudogap in the superconductor CaxLa1 -xBa1.75 -xLa0.25 +xCu3Oy with respect to doping and ion size  

NASA Astrophysics Data System (ADS)

The cuprate superconductor CaxLa1 -xBa1.75 -xLa0.25 +xCu3Oy has been proposed as a model system which allows systematic variation in the optimum transition temperature, Tc ,max, with doping and ion size. However, we show that the Tc ,max values are anomalous in this system. We determine the doping accurately and show that the phase curve, as a function of doping, is anomalously truncated so that values of Tc ,max appear to decrease with decreasing x , concealing the generic increase expected as ion size increases. We also thereby resolve its reported anomalous pseudogap behavior from NMR and anomalous superconducting gap from angle-resolved photoemission spectroscopy.

Tallon, J. L.

2014-12-01

496

A dual-channel cooled GaAsFET receiver for the Dominion Radio Astrophysical Observatory 26-metre radio telescope covering 1.35 to 1.75 GHz  

NASA Astrophysics Data System (ADS)

A low-noise receiver for a radio telescope is described. Two identical three-stage GaAsFET amplifiers were built which give excess noise temperatures of less than 28 K with at least 34 dB gain between 1.35 and 1.75 GHz when operated at a physical temperature of 12 K. This noise temperature is measured at the cryostat input connectors. The physical temperature is maintained by a closed cycle helium refrigerator. Source-inductance feedback is used to allow optimum noise performance combined with good input match. Return loss is better than 15 dB across the band. Construction details of the amplifiers and their mounting in the cryostat are provided. Sample observational results are presented.

Walker, G.; Vaneldik, J. F.; Routledge, D.; Landecker, T. L.; Galt, J. A.

1988-01-01

497

Team 175: Command and Control of UAV  

E-print Network

and implement a robust and flexible flight system for a quad-copter to achieve autonomous command and control accurate positioning data in GPS denied environments. This project used an X-frame quad-copter to contain-planning algortihms. The quad-copter is tested in a contained enviroment with static dimensions and obstacles

Zhou, Shengli

498

25 CFR 175.1 - Definitions.  

Code of Federal Regulations, 2010 CFR

...provided in the operations manual. Electric power utility...set forth in the operations manual. Officer-in-Charge...with this part. Operations manual means the utility's written...customer service to customers, prospective customers, and other...

2010-04-01

499

27 CFR 9.175 - Dos Rios.  

Code of Federal Regulations, 2012 CFR

...Mendocino County, California, at the confluence of the Eel River and the Middle Fork of the Eel River. The area's boundaries are defined as follows...the section line, crossing the Middle Fork of the Eel River, to the southeast corner of section...

2012-04-01

500

27 CFR 9.175 - Dos Rios.  

Code of Federal Regulations, 2013 CFR

...Mendocino County, California, at the confluence of the Eel River and the Middle Fork of the Eel River. The area's boundaries are defined as follows...the section line, crossing the Middle Fork of the Eel River, to the southeast corner of section...

2013-04-01