Ytterbium-porphyrins as a new class of the luminescent labels

NASA Astrophysics Data System (ADS)

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

2007-08-01

New complexes of ytterbium with asymmetric porphyrins containing substituents in β-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 (λmax = 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.

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

DOE Office of Scientific and Technical Information (OSTI.GOV)

Rybaltovsky, A A; Bobkov, K K; Likhachev, M E

2013-11-30

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 (Yb{sup 2+}). 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 Yb{sup 2+} formation.more » (nonlinear optical phenomena)« less

Solid-State Laser Cooling of Ytterbium-Doped Tungstate Crystals

DTIC Science & Technology

2001-01-01

namely the heavy metal fluoride glass ZBLAN and yttrium aluminum garnet . Favorable properties of the ytterbium-tungstates include exceptionally high...Optical refrigeration in Nd-doped yttrium aluminum garnet ,” Phys. Rev. Lett. 21, 1172 (1968). 2M.S. Chang, S.S. Elliott, T.K. Gustafson, C. Hu, and...idea gained experimental feasibility. Even with this tool, early failures to optically cool condensed media such as Nd3+ doped in yttrium aluminum

Modelling the competition between photo-darkening and photo-bleaching effects in high-power ytterbium-doped fibre amplifiers

NASA Astrophysics Data System (ADS)

Jolly, A.; Vinçont, C.; Pierre, Ch.; Boullet, J.

2017-08-01

We propose an innovative, fully space-time model to take into account the seed-dependent nature of ageing penalties in high-power ytterbium-doped fibre amplifiers. Ageing is shown to be based on the on-going competition between photo-darkening and photo-bleaching phenomena. Our approach is based on the natural interplay between the excited states of co-existing ytterbium pairs and colour centres in highly doped fibres, in the presence of thermal coupling between the closely spaced excited states. As initiated from IR photons, the excitation of colour centres up to the UV band is supposed to be governed by multi-photon absorption. The interactions of interest in the kinetics of photo-bleaching then take the form of highly efficient charge transfers, which imply the reduction of some fraction of the basically trivalent ions to their divalent state. Due to the activation of ytterbium pairs by means of energy transfer up-conversion, these interactions get more and more effective at elevated operating powers. Computational results using these principles actually help to fit our experimental data regarding seeding effects, as well as fully generic trends already evidenced in the literature. This gives a fine demonstration for the need to discriminate co-active pump and signal contributions. Our self-consistent, still simplified model then consists of a valuable tool to help for a deeper understanding of the ageing issues. Furthermore, considering higher-order ytterbium aggregates, this should open new routes towards more comprehensive models.

Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

NASA Technical Reports Server (NTRS)

Good, Brian S.

2015-01-01

Ytterbium disilicate is of interest as a potential environmental barrier coating for aerospace applications, notably for use in next generation jet turbine engines. In such applications, the transport of oxygen and water vapor through these coatings to the ceramic substrate is undesirable if high temperature oxidation is to be avoided. In an effort to understand the diffusion process in these materials, we have performed kinetic Monte Carlo simulations of vacancy-mediated and interstitial oxygen diffusion in Ytterbium disilicate. Oxygen vacancy and interstitial site energies, vacancy and interstitial formation energies, and migration barrier energies were computed using Density Functional Theory. We have found that, in the case of vacancy-mediated diffusion, many potential diffusion paths involve large barrier energies, but some paths have barrier energies smaller than one electron volt. However, computed vacancy formation energies suggest that the intrinsic vacancy concentration is small. In the case of interstitial diffusion, migration barrier energies are typically around one electron volt, but the interstitial defect formation energies are positive, with the result that the disilicate is unlikely to exhibit experience significant oxygen permeability except at very high temperature.

Beyond-Born-Oppenheimer effects in sub-kHz-precision photoassociation spectroscopy of ytterbium atoms

NASA Astrophysics Data System (ADS)

Borkowski, Mateusz; Buchachenko, Alexei A.; Ciuryło, Roman; Julienne, Paul S.; Yamada, Hirotaka; Kikuchi, Yuu; Takahashi, Kakeru; Takasu, Yosuke; Takahashi, Yoshiro

2017-12-01

We present high-resolution two-color photoassociation spectroscopy of Bose-Einstein condensates of ytterbium atoms. The use of narrow Raman resonances and careful examination of systematic shifts enabled us to measure 13 bound-state energies for three isotopologues of the ground-state ytterbium molecule with standard uncertainties of the order of 500 Hz. The atomic interactions are modeled using an ab initio based mass-scaled Born-Oppenheimer potential whose long-range van der Waals parameters and total WKB phase are fitted to experimental data. We find that the quality of the fit of this model, of about 112.9 kHz (rms) can be significantly improved by adding the recently calculated beyond-Born-Oppenheimer (BBO) adiabatic corrections [J. J. Lutz and J. M. Hutson, J. Mol. Spectrosc. 330, 43 (2016), 10.1016/j.jms.2016.08.007] and by partially treating the nonadiabatic effects using distance-dependent reduced masses. Our BBO interaction model represents the experimental data to within about 30.2 kHz on average, which is 3.7 times better than the "reference" Born-Oppenheimer model. We calculate the s -wave scattering lengths for bosonic isotopic pairs of ytterbium atoms with error bars over two orders of magnitude smaller than previous determinations. For example, the s -wave scattering length for 174Yb is +5.55812 (50 ) nm.

Size-dependent abnormal thermo-enhanced luminescence of ytterbium-doped nanoparticles.

PubMed

Cui, Xiangshui; Cheng, Yao; Lin, Hang; Huang, Feng; Wu, Qingping; Wang, Yuansheng

2017-09-21

Thermal quenching above 300 K is widely expected in photoluminescence. Luminescence quenching is usually ascribed to the non-radiative relaxation of excited electrons to the ground state of the activators, during which a high temperature always plays a role in pushing the excited electrons towards the quenching channels, leading to thermal quenching. For the lanthanide-doped nanoparticles, however, there is a special luminescence quenching channel that does not exist in their bulk counterparts, i.e., energy migration-induced surface quenching. Herein, a size-dependent abnormal thermal enhancement of luminescence in the temperature range of 300 K to 423 K in the ytterbium-doped fluoride nanoparticles is presented for the first time. Importantly, in this work, we originally demonstrate that the energy migration-induced surface quenching can be suppressed by increasing temperature, which results in the abnormal thermal enhancement of luminescence. According to the temperature-dependent X-ray diffraction and lifetime analyses, an underlying mechanism based on the effect of thermal lattice expansion on ytterbium-mediated energy migration is proposed. This new finding adds new insights to the size effect on the luminescent characteristics of nanoparticles, which could be utilized to construct some unique nanostructures, especially for many important temperature-related purposes, such as thermal sensing technology.

33 CFR 175.113 - Launchers.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual distress signal carried to meet the requirements of § 175.110 requires a launcher to activate, then a launcher...

33 CFR 175.113 - Launchers.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual distress signal carried to meet the requirements of § 175.110 requires a launcher to activate, then a launcher...

33 CFR 175.113 - Launchers.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual distress signal carried to meet the requirements of § 175.110 requires a launcher to activate, then a launcher...

33 CFR 175.113 - Launchers.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual distress signal carried to meet the requirements of § 175.110 requires a launcher to activate, then a launcher...

33 CFR 175.113 - Launchers.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual distress signal carried to meet the requirements of § 175.110 requires a launcher to activate, then a launcher...

Anion dependent ion pairing in concentrated ytterbium halide solutions

NASA Astrophysics Data System (ADS)

Klinkhammer, Christina; Böhm, Fabian; Sharma, Vinay; Schwaab, Gerhard; Seitz, Michael; Havenith, Martina

2018-06-01

We have studied ion pairing of ytterbium halide solutions. THz spectra (30-400 cm-1) of aqueous YbCl3 and YbBr3 solutions reveal fundamental differences in the hydration structures of YbCl3 and YbBr3 at high salt concentrations: While for YbBr3 no indications for a changing local hydration environment of the ions were experimentally observed within the measured concentration range, the spectra of YbCl3 pointed towards formation of weak contact ion pairs. The proposed anion specificity for ion pairing was confirmed by supplementary Raman measurements.

Towards diode-pumped mid-infrared praseodymium-ytterbium-doped fluoride fiber lasers

NASA Astrophysics Data System (ADS)

Woodward, R. I.; Hudson, D. D.; Jackson, S. D.

2018-02-01

We explore the potential of a new mid-infrared laser transition in praseodymium-doped fluoride fiber for emission around 3.4 μm, which can be conveniently pumped by 0.975 μm diodes via ytterbium sensitizer co-doping. Optimal cavity designs are determined through spectroscopic measurements and numerical modeling, suggesting that practical diode-pumped watt-level mid-infrared fiber sources beyond 3 μm could be achieved.

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

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bobkov, K K; Rybaltovsky, A A; Vel'miskin, V V

2014-12-31

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 Yb{sup 2+} ions in the glass network under IR laser pumping at a wavelength λ = 915 nm and under UV irradiation with an excimer laser (λ = 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 Yb{sup 2+} ions and aluminium – oxygen hole centres (Al-OHCs), common to ytterbium-doped YAG crystals and aluminosilicatemore » glass, has been identified: photoinduced Yb{sup 3+} charge-transfer state excitation. (optical fibres)« less

2 CFR 175.20 - Referral.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.20 Referral. An agency official should inform the agency's...

25 CFR 175.32 - Collections.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 1 2010-04-01 2010-04-01 false Collections. 175.32 Section 175.32 Indians BUREAU OF..., Payments, and Collections § 175.32 Collections. The utility shall attempt collection on checks returned by... for each collection action taken by the utility other than court proceedings. An unredeemed check...

Cladding-pumped ytterbium-doped fiber laser with radially polarized output.

PubMed

Lin, Di; Daniel, J M O; Gecevičius, M; Beresna, M; Kazansky, P G; Clarkson, W A

2014-09-15

A simple technique for directly generating a radially polarized output beam from a cladding-pumped ytterbium-doped fiber laser is reported. Our approach is based on the use of a nanograting spatially variant waveplate as an intracavity polarization-controlling element. The laser yielded ~32 W of output power (limited by available pump power) with a radially polarized TM (01)-mode output beam at 1040 nm with a corresponding slope efficiency of 66% and a polarization purity of 95%. The beam-propagation factor (M(2)) was measured to be ~1.9-2.1.

2 CFR 175.20 - Referral.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 2 Grants and Agreements 1 2014-01-01 2014-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.20...

2 CFR 175.20 - Referral.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS [Reserved] AWARD TERM FOR TRAFFICKING IN PERSONS § 175.20...

24 CFR 35.175 - Records.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Records. 35.175 Section 35.175... and Definitions for All Programs. § 35.175 Records. The designated party, as specified in subparts C... records applicable to a portion of a residential property for which ongoing lead-based paint maintenance...

24 CFR 35.175 - Records.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Records. 35.175 Section 35.175... and Definitions for All Programs. § 35.175 Records. The designated party, as specified in subparts C... records applicable to a portion of a residential property for which ongoing lead-based paint maintenance...

24 CFR 35.175 - Records.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Records. 35.175 Section 35.175... and Definitions for All Programs. § 35.175 Records. The designated party, as specified in subparts C... records applicable to a portion of a residential property for which ongoing lead-based paint maintenance...

24 CFR 35.175 - Records.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Records. 35.175 Section 35.175... and Definitions for All Programs. § 35.175 Records. The designated party, as specified in subparts C... records applicable to a portion of a residential property for which ongoing lead-based paint maintenance...

24 CFR 35.175 - Records.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Records. 35.175 Section 35.175... and Definitions for All Programs. § 35.175 Records. The designated party, as specified in subparts C... records applicable to a portion of a residential property for which ongoing lead-based paint maintenance...

25 CFR 175.3 - Compliance.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 1 2010-04-01 2010-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part. ...

25 CFR 175.3 - Compliance.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 1 2011-04-01 2011-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part. ...

40 CFR 97.175 - Petitions.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Petitions. 97.175 Section 97.175... BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS Monitoring and Reporting § 97.175 Petitions. The CAIR designated representative of a CAIR NOX unit may submit a petition under § 75.66 of this...

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

DOE Office of Scientific and Technical Information (OSTI.GOV)

Doerscher, Soeren; Thobe, Alexander; Hundt, Bastian

2013-04-15

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 {sup 1}S{sub 0}{yields}{sup 1}P{sub 1} transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow {sup 1}S{sub 0}{yields}{sup 3}P{sub 1} intercombination transition. Subsequently, atoms are transferred to a crossed opticalmore » dipole trap and cooled evaporatively to quantum degeneracy.« less

40 CFR 161.175 - Certified limits.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 40 Protection of Environment 25 2013-07-01 2013-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements § 161.175...

40 CFR 161.175 - Certified limits.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 40 Protection of Environment 24 2011-07-01 2011-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements § 161.175...

33 CFR 175.135 - Existing equipment.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment. Launchers...

33 CFR 175.135 - Existing equipment.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment. Launchers...

33 CFR 175.135 - Existing equipment.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment. Launchers...

33 CFR 175.135 - Existing equipment.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment. Launchers...

33 CFR 175.135 - Existing equipment.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment. Launchers...

Observation of defect-assisted enhanced visible whispering gallery modes in ytterbium-doped ZnO microsphere

NASA Astrophysics Data System (ADS)

Khanum, Rizwana; Moirangthem, Rakesh S.; Das, Nayan Mani

2017-06-01

Smooth surfaced and crystalline undoped and ytterbium doped zinc oxide (ZnO) microspheres having an approximate size of 3-5 μm were synthesized by hydrothermal process. Out of these microspheres, a single microparticle was chosen and engaged as a whispering gallery wave microresonator. The defect induced luminescence from an individual ZnO microsphere was investigated with micro-photoluminescence measurement in the spectral range of 565 to 740 nm under the excitation of a green laser having a centered wavelength at 532 nm. The defects-related emissions from a single ZnO microsphere show optical resonance peaks so-called "whispering gallery modes" (WGMs) which are confirmed with the theoretical calculation. Further, ZnO microspheres were chemically doped with the different molar percentages of Ytterbium (Yb), and enhancement in their emission properties was investigated. Our experimental results show that ZnO microspheres with 0.5 mol. % doping of Yb gives the strongest optical emission and has highest Q-factor which can be employed in the development of WGM based optical biosensor or laser.

49 CFR 175.705 - Radioactive contamination.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present or...

978-nm square-wave in an all-fiber single-mode ytterbium-doped fiber laser

NASA Astrophysics Data System (ADS)

Li, Shujie; Xu, Lixin; Gu, Chun

2018-01-01

A 978 nm single mode passively mode-locked all-fiber laser delivering square-wave pulses was demonstrated using a figure-8 cavity and a 75 cm commercial double-clad ytterbium-doped fiber. We found the three-level system near 978 nm was able to operate efficiently under clad pumping, simultaneously oscillation around 1030 nm well inhibited. The optimized nonlinear amplifying loop mirror made the mode locking stable and performed the square-pulses shaping. To the best of our knowledge, it is the first time to report the square-wave pulse fiber laser operating at 980 nm. The spectral width of the 978 mode-locked square pulses was about 4 nm, far greater than that of the mode-locked square pulses around 1060 nm reported before, which would be helpful to deeply understand the various square-wave pulses' natures and forming mechanisms. Compared with modulated single-mode or multimode 980 nm LDs, this kind of 980 nm square-wave sources having higher brightness, more steeper rising and falling edge and shorter pulse width, might have potential applications in pumping nanosecond ytterbium or erbium fiber lasers and amplifiers.

Ytterbium-doped fibre laser Q-switched by a cantilever-type micro-mirror.

PubMed

Fabert, Marc; Desfarges-Berthelemot, Agnès; Kermène, Vincent; Crunteanu, Aurelian; Bouyge, David; Blondy, Pierre

2008-12-22

We present an Ytterbium fibre laser operating in the Q-switch regime by using a Micro- Opto- Electro- Mechanical System (MOEMS) of novel design. The cantilever-type micro-mirror is designed to generate short laser pulses with duration between 20 ns and 100 ns at repetition rates ranging from a few kilohertz up to 800 kHz. The bent profile of this new type of MOEMS ensures a high modulation rate of the laser cavity losses while keeping a high actuating frequency.

37 CFR 1.75 - Claim(s).

Code of Federal Regulations, 2011 CFR

2011-07-01

... 37 Patents, Trademarks, and Copyrights 1 2011-07-01 2011-07-01 false Claim(s). 1.75 Section 1.75 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a...

37 CFR 1.75 - Claim(s).

Code of Federal Regulations, 2014 CFR

2014-07-01

... 37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Claim(s). 1.75 Section 1.75 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a...

46 CFR 108.175 - Contiguous locations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as that...

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

NASA Technical Reports Server (NTRS)

Numata, Kenji; Camp, Jordan

2012-01-01

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

43 CFR 17.5 - Compliance information.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 43 Public Lands: Interior 1 2014-10-01 2014-10-01 false Compliance information. 17.5 Section 17.5... Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee shall... containing such information, as the Secretary or his designee may determine to be necessary to enable him to...

21 CFR 175.250 - Paraffin (synthetic).

Code of Federal Regulations, 2014 CFR

2014-04-01

..., packaging, transporting, or holding food in accordance with the following prescribed conditions: (a) The... synthetic paraffin used in food-packaging adhesives complying with § 175.105. [42 FR 14534, Mar. 15, 1977... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Paraffin (synthetic). 175.250 Section 175.250 Food...

Deterministic chaos in an ytterbium-doped mode-locked fiber laser

NASA Astrophysics Data System (ADS)

Mélo, Lucas B. A.; Palacios, Guillermo F. R.; Carelli, Pedro V.; Acioli, Lúcio H.; Rios Leite, José R.; de Miranda, Marcio H. G.

2018-05-01

We experimentally study the nonlinear dynamics of a femtosecond ytterbium doped mode-locked fiber laser. With the laser operating in the pulsed regime a route to chaos is presented, starting from stable mode-locking, period two, period four, chaos and period three regimes. Return maps and bifurcation diagrams were extracted from time series for each regime. The analysis of the time series with the laser operating in the quasi mode-locked regime presents deterministic chaos described by an unidimensional Rossler map. A positive Lyapunov exponent $\\lambda = 0.14$ confirms the deterministic chaos of the system. We suggest an explanation about the observed map by relating gain saturation and intra-cavity loss.

22 CFR 17.5 - Financial hardship.

Code of Federal Regulations, 2010 CFR

2010-04-01

... as follows: (i) The individual's financial ability to pay at the time collection is scheduled to be... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior...

21 CFR 172.175 - Sodium nitrite.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION Food Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified foods in accordance with the...

2 CFR 175.15 - Award term.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 2 Grants and Agreements 1 2014-01-01 2014-01-01 false Award term. 175.15 Section 175.15 Grants and... grant or cooperative agreement to a private entity, as defined in § 175.25(d); and (2) A grant or... subawards under the award. 2. We as the Federal awarding agency may unilaterally terminate this award...

2 CFR 175.15 - Award term.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Award term. 175.15 Section 175.15 Grants and... grant or cooperative agreement to a private entity, as defined in § 175.25(d); and (2) A grant or... subawards under the award. 2. We as the Federal awarding agency may unilaterally terminate this award...

21 CFR 169.175 - Vanilla extract.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Vanilla extract. 169.175 Section 169.175 Food and... § 169.175 Vanilla extract. (a) Vanilla extract is the solution in aqueous ethyl alcohol of the sapid and odorous principles extractable from vanilla beans. In vanilla extract the content of ethyl alcohol is not...

21 CFR 169.175 - Vanilla extract.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 2 2012-04-01 2012-04-01 false Vanilla extract. 169.175 Section 169.175 Food and... § 169.175 Vanilla extract. (a) Vanilla extract is the solution in aqueous ethyl alcohol of the sapid and odorous principles extractable from vanilla beans. In vanilla extract the content of ethyl alcohol is not...

21 CFR 172.175 - Sodium nitrite.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium nitrite...

21 CFR 172.175 - Sodium nitrite.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium nitrite...

21 CFR 172.175 - Sodium nitrite.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium nitrite...

21 CFR 172.175 - Sodium nitrite.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium nitrite...

14 CFR 93.175 - Applicability.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Applicability. 93.175 Section 93.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC... VFR operations in the vicinity of Luke Air Force Base, AZ. ...

14 CFR 93.175 - Applicability.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Applicability. 93.175 Section 93.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC... VFR operations in the vicinity of Luke Air Force Base, AZ. ...

14 CFR 93.175 - Applicability.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Applicability. 93.175 Section 93.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC... VFR operations in the vicinity of Luke Air Force Base, AZ. ...

14 CFR 93.175 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Applicability. 93.175 Section 93.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC... VFR operations in the vicinity of Luke Air Force Base, AZ. ...

14 CFR 93.175 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Applicability. 93.175 Section 93.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC... VFR operations in the vicinity of Luke Air Force Base, AZ. ...

37 CFR 1.75 - Claim(s).

Code of Federal Regulations, 2010 CFR

2010-07-01

... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Claim(s). 1.75 Section 1.75... GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a.... (35 U.S.C. 6; 15 U.S.C. 1113, 1126) [31 FR 12922, Oct. 4, 1966, as amended at 36 FR 12690, July 3...

2 CFR 175.15 - Award term.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 2 Grants and Agreements 1 2012-01-01 2012-01-01 false Award term. 175.15 Section 175.15 Grants and... section in— (1) A grant or cooperative agreement to a private entity, as defined in § 175.25(d); and (2) A... performance of the award or subawards under the award. 2. We as the Federal awarding agency may unilaterally...

2 CFR 175.15 - Award term.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 2 Grants and Agreements 1 2013-01-01 2013-01-01 false Award term. 175.15 Section 175.15 Grants and... section in— (1) A grant or cooperative agreement to a private entity, as defined in § 175.25(d); and (2) A... performance of the award or subawards under the award. 2. We as the Federal awarding agency may unilaterally...

Ytterbium coating of spherical Ni(OH) 2 cathode materials for Ni-MH batteries at elevated temperature

NASA Astrophysics Data System (ADS)

He, Xiangming; Wang, Li; Li, Wen; Jiang, Changyin; Wan, Chunrong

The Yb/Co coated nickel hydroxides were prepared by precipitation of Yb(OH) 3 on the surface of spherical nickel hydroxide, followed by precipitation of Co(OH) 2 on its surface. The optimum coating content of ytterbium was around 2% (atomic concentration) to obtain high discharge capacity at 60 °C. It was shown that the discharge capacity of nickel hydroxide at high temperatures was improved by coating of ytterbium and cobalt hydroxide. The high temperature performances of the sealed AAA-sized Ni-MH batteries using Yb/Co coated nickel hydroxide as positive electrodes were carried out, showing much better than those using the un-coated and only Co(OH) 2 coated nickel hydroxide electrodes. The charge acceptance of the battery using 2% Yb and 2% Co coated nickel hydroxide reached 92% at 60 °C, where the charge acceptances for the un-coated and only cobalt coated ones were only 42 and 46%, respectively. It has shown that the Yb/Co coating is an effective way to improve the high temperature performance of nickel hydroxide for nickel-metal hydride batteries.

2 CFR 175.25 - Definitions.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 2 Grants and Agreements 1 2014-01-01 2014-01-01 false Definitions. 175.25 Section 175.25 Grants... means: (1) A foreign government or foreign governmental entity; (2) A public international organization...) Local government means a: (1) County; (2) Borough; (3) Municipality; (4) City; (5) Town; (6) Township...

2 CFR 175.25 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Definitions. 175.25 Section 175.25 Grants... means: (1) A foreign government or foreign governmental entity; (2) A public international organization...) Local government means a: (1) County; (2) Borough; (3) Municipality; (4) City; (5) Town; (6) Township...

31 CFR 103.175 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-07-01

... REPORTING OF CURRENCY AND FOREIGN TRANSACTIONS Anti-Money Laundering Programs Special Due Diligence for...-money laundering program requirement; (viii) A broker or dealer in securities registered, or required to... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Definitions. 103.175 Section 103.175...

2 CFR 175.20 - Referral.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 2 Grants and Agreements 1 2012-01-01 2012-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD TERM FOR TRAFFICKING IN...

2 CFR 175.20 - Referral.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 2 Grants and Agreements 1 2013-01-01 2013-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD TERM FOR TRAFFICKING IN...

2 CFR 175.25 - Definitions.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 2 Grants and Agreements 1 2013-01-01 2013-01-01 false Definitions. 175.25 Section 175.25 Grants...) Foreign public entity means: (1) A foreign government or foreign governmental entity; (2) A public... of their status as Indians. (c) Local government means a: (1) County; (2) Borough; (3) Municipality...

2 CFR 175.25 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 2 Grants and Agreements 1 2012-01-01 2012-01-01 false Definitions. 175.25 Section 175.25 Grants...) Foreign public entity means: (1) A foreign government or foreign governmental entity; (2) A public... of their status as Indians. (c) Local government means a: (1) County; (2) Borough; (3) Municipality...

Reverse spontaneous laser line sweeping in ytterbium fiber laser

NASA Astrophysics Data System (ADS)

Navratil, P.; Peterka, P.; Honzatko, P.; Kubecek, V.

2017-03-01

Self-induced laser line sweeping of various regimes of sweep direction is reported for an experimental ytterbium fiber laser. The regimes involve sweeping from shorter to longer wavelengths (1076~\\text{nm}\\to 1083 nm)—so-called normal self-sweeping; from longer to shorter wavelengths (1079~\\text{nm}\\to 1073 nm)—so-called reverse self-sweeping; and a mixed regime in which a precarious balance of the normal and reverse sweeping exists and the sweep direction can change between consecutive sweeps. The regimes of sweeping were selected by changing the pump wavelength only. A detailed explanation of this sweep direction dynamics is presented based on a semi-empirical model. This model also provides a way to predict the sweep direction of fiber lasers based on other rare-earth-doped laser media.

21 CFR 133.175 - Pasteurized cheese spread.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the food...

21 CFR 133.175 - Pasteurized cheese spread.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 2 2011-04-01 2011-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the food...

13 CFR 120.175 - Coastal barrier islands.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Coastal barrier islands. 120.175 Section 120.175 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION BUSINESS LOANS Policies Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier...

40 CFR 35.175 - Maximum federal share.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of the...

7 CFR 1726.175 - General plant materials.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material and...

7 CFR 1726.175 - General plant materials.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material and...

7 CFR 1726.175 - General plant materials.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 7 Agriculture 11 2012-01-01 2012-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material and...

7 CFR 1726.175 - General plant materials.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 7 Agriculture 11 2013-01-01 2013-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material and...

19 CFR 122.175 - Exemption from penalties.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption from...

21 CFR 133.175 - Pasteurized cheese spread.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 2 2013-04-01 2013-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the food... statement of ingredients, prescribed for pasteurized process cheese spread by § 133.179, except that no...

46 CFR 175.900 - OMB control numbers.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 7 2014-10-01 2014-10-01 false OMB control numbers. 175.900 Section 175.900 Shipping...) GENERAL PROVISIONS § 175.900 OMB control numbers. (a) Purpose. This section lists the control numbers... that agencies display a current control number assigned by the Director of OMB for each approved agency...

46 CFR 175.900 - OMB control numbers.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 7 2012-10-01 2012-10-01 false OMB control numbers. 175.900 Section 175.900 Shipping...) GENERAL PROVISIONS § 175.900 OMB control numbers. (a) Purpose. This section lists the control numbers... that agencies display a current control number assigned by the Director of OMB for each approved agency...

Frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Akulov, V A; Kablukov, S I; Babin, Sergei A

2012-02-28

This paper presents an experimental study of frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes. In the XY plane, we obtained continuous tuning in the range 528 - 540 nm through intracavity frequency doubling. The second-harmonic power reached 450 mW for 18 W of multimode diode pump power, which was five times higher in comparison with single-pass frequency doubling. In a single-pass configuration in the YZ plane, we obtained a wide tuning range (527 - 551 nm) in the green spectral region and a second-harmonic power of {approx}10 mW. Themore » tuning range was only limited by the mechanical performance of the fibre Bragg grating and can potentially be extended to the entire lasing range of the ytterbium-doped fibre laser.« less

Polarizing Ytterbium-Doped all-Solid Photonic Bandgap Fiber with 1150 micrometers2 Effective Mode Area

DTIC Science & Technology

2015-02-11

RESPONSIBLE PERSON 19b. TELEPHONE NUMBER Liang Dong Fanting Kong,, Guancheng Gu,, Thomas W. Hawkins ,, Joshua Parsons, Maxwell Jones,, Christopher...Dunn,, Monica T. Kalichevsky-Dong,, Benjamin Pulford,, Iyad Dajani,, Kunimasa Saitoh,, Stephen P. Palese,, Eric Cheung,, Liang Dong c. THIS PAGE The...ytterbium-doped all-solid photonic bandgap fiber with ~1150µm2 effective mode area Fanting Kong,1,* Guancheng Gu,1 Thomas W. Hawkins ,1 Joshua Parsons

40 CFR 161.175 - Certified limits.

Code of Federal Regulations, 2010 CFR

2010-07-01

... how the certified limits were arrived at (e.g., sample analysis, quantitative estimate based on....175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements § 161.175...

40 CFR 61.175 - Monitoring requirements.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 8 2010-07-01 2010-07-01 false Monitoring requirements. 61.175 Section 61.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS National Emission Standard for Inorganic Arsenic...

40 CFR 61.175 - Monitoring requirements.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 40 Protection of Environment 8 2011-07-01 2011-07-01 false Monitoring requirements. 61.175 Section 61.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS National Emission Standard for Inorganic Arsenic...

21 CFR 175.250 - Paraffin (synthetic).

Code of Federal Regulations, 2011 CFR

2011-04-01

..., manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food in accordance... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Paraffin (synthetic). 175.250 Section 175.250 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR...

21 CFR 175.250 - Paraffin (synthetic).

Code of Federal Regulations, 2010 CFR

2010-04-01

..., manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food in accordance... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Paraffin (synthetic). 175.250 Section 175.250 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR...

21 CFR 175.250 - Paraffin (synthetic).

Code of Federal Regulations, 2012 CFR

2012-04-01

..., manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food in accordance... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Paraffin (synthetic). 175.250 Section 175.250 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR...

21 CFR 175.250 - Paraffin (synthetic).

Code of Federal Regulations, 2013 CFR

2013-04-01

..., manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food in accordance... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Paraffin (synthetic). 175.250 Section 175.250 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR...

25 CFR 175.24 - Utility responsibilities.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 1 2011-04-01 2011-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... accordance with accepted industry practice; (c) Exercise reasonable care in protecting customer-owned...

25 CFR 175.24 - Utility responsibilities.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 25 Indians 1 2013-04-01 2013-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... accordance with accepted industry practice; (c) Exercise reasonable care in protecting customer-owned...

25 CFR 175.24 - Utility responsibilities.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 25 Indians 1 2012-04-01 2011-04-01 true Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... accordance with accepted industry practice; (c) Exercise reasonable care in protecting customer-owned...

25 CFR 175.24 - Utility responsibilities.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 25 Indians 1 2014-04-01 2014-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... accordance with accepted industry practice; (c) Exercise reasonable care in protecting customer-owned...

24 CFR 891.175 - Technical assistance.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 24 Housing and Urban Development 4 2010-04-01 2010-04-01 false Technical assistance. 891.175... Requirements § 891.175 Technical assistance. For purposes of the Section 202 Program and the Section 811 Program, the Secretary shall make available appropriate technical assistance to assure that applicants...

The dawn of computer-assisted robotic osteotomy with ytterbium-doped fiber laser.

PubMed

Sotsuka, Yohei; Nishimoto, Soh; Tsumano, Tomoko; Kawai, Kenichiro; Ishise, Hisako; Kakibuchi, Masao; Shimokita, Ryo; Yamauchi, Taisuke; Okihara, Shin-ichiro

2014-05-01

Currently, laser radiation is used routinely in medical applications. For infrared lasers, bone ablation and the healing process have been reported, but no laser systems are established and applied in clinical bone surgery. Furthermore, industrial laser applications utilize computer and robot assistance; medical laser radiations are still mostly conducted manually nowadays. The purpose of this study was to compare the histological appearance of bone ablation and healing response in rabbit radial bone osteotomy created by surgical saw and ytterbium-doped fiber laser controlled by a computer with use of nitrogen surface cooling spray. An Ytterbium (Yb)-doped fiber laser at a wavelength of 1,070 nm was guided by a computer-aided robotic system, with a spot size of 100 μm at a distance of approximately 80 mm from the surface. The output power of the laser was 60 W at the scanning speed of 20 mm/s scan using continuous wave system with nitrogen spray level 0.5 MPa (energy density, 3.8 × 10(4) W/cm(2)). Rabbits radial bone osteotomy was performed by an Yb-doped fiber laser and a surgical saw. Additionally, histological analyses of the osteotomy site were performed on day 0 and day 21. Yb-doped fiber laser osteotomy revealed a remarkable cutting efficiency. There were little signs of tissue damage to the muscle. Lased specimens have shown no delayed healing compared with the saw osteotomies. Computer-assisted robotic osteotomy with Yb-doped fiber laser was able to perform. In rabbit model, laser-induced osteotomy defects, compared to those by surgical saw, exhibited no delayed healing response.

10 CFR 52.175 - Transfer of manufacturing license.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 10 Energy 2 2010-01-01 2010-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing license...

21 CFR 189.175 - P-4000.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true P-4000. 189.175 Section 189.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) SUBSTANCES PROHIBITED FROM USE IN HUMAN FOOD Substances Generally Prohibited From...

7 CFR 1.75 - General stipulations.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 7 Agriculture 1 2013-01-01 2013-01-01 false General stipulations. 1.75 Section 1.75 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Cooperative Production of Television... direct or implied, by the U.S. Department of Agriculture or its agencies, of the sponsor's product. (d...

21 CFR 189.175 - P-4000.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 3 2013-04-01 2013-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) SUBSTANCES PROHIBITED FROM USE IN HUMAN FOOD Substances Generally Prohibited From...

21 CFR 189.175 - P-4000.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 3 2012-04-01 2012-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) SUBSTANCES PROHIBITED FROM USE IN HUMAN FOOD Substances Generally Prohibited From...

Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

DOE Office of Scientific and Technical Information (OSTI.GOV)

Duchez, Jean-Bernard, E-mail: jbduchez@unice.fr; Mady, Franck, E-mail: jbduchez@unice.fr; Mebrouk, Yasmine, E-mail: jbduchez@unice.fr

2014-10-21

We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding)

Ytterbium-doped glass-ceramics for optical refrigeration.

PubMed

Filho, Elton Soares de Lima; Krishnaiah, Kummara Venkata; Ledemi, Yannick; Yu, Ye-Jin; Messaddeq, Younes; Nemova, Galina; Kashyap, Raman

2015-02-23

We report for the first time the characterization of glass-ceramics for optical refrigeration. Ytterbium-doped nanocrystallites were grown in an oxyfluoride glass matrix of composition 2YbF(3):30SiO(2)-15Al(2)O(3)-25CdF(2)-22PbF(2)-4YF(3), forming bulk glass-ceramics at three different crystalisation levels. The samples are compared with a corresponding uncrystalised (glass) sample, as well as a Yb:YAG sample which has presented optical cooling. The measured X-ray diffraction spectra, and thermal capacities of the samples are reported. We also report for the first time the use of Yb:YAG as a reference for absolute photometric quantum efficiency measurement, and use the same setup to characterize the glass and glass-ceramic samples. The cooling figure-of-merit was measured by optical calorimetry using a fiber Bragg grating and found to depend on the level of crystallization of the sample, and that samples with nanocrystallites result in higher quantum efficiency and lower background absorption than the pure-glass sample. In addition to laser-induced cooling, the glass-ceramics have the potential to serve as a reference for quantum efficiency measurements.

Influence of ground-state scattering properties on photoassociation spectra near the intercombination line of bosonic ytterbium

DOE Office of Scientific and Technical Information (OSTI.GOV)

Borkowski, M.; Ciurylo, R.; Julienne, P. S.

2010-10-29

We study theoretically the properties of photoassociation spectra near the {sup 1}S{sub 0}-{sup 3}P{sub 1} inter-combination line of bosonic ytterbium. We construct a mass scaled model of the excited state interaction potential that well describes bound state energies obtained in a previous photoassociation experiment. We then use it to calculate theoretical photoassociation spectra in a range of ultracold temperatures using semianalytical theory developed by Bohn and Julienne.Photoassociation spectra not only give us the energies of excited bound states, but also provide information about the behavior of the ground state wavefunction. In fact, it can be shown that within the so-calledmore » reflection approximation the line intensity is proportional to the ground state wavefunction at the transition's Condon point. We show that in the case of ytterbium, the rotational structure of the photoassociation spectra depends heavily on the behavior of the ground-state wavefunction. The change of the scattering length from one isotope to another and the resulting occurence of shape resonances in higher partial waves determines the appearance and disapperance of rotational components, especially in the deeper lying states, whose respective Condon points lie near the ground state centrifugal barrier. Thus, photoassociation spectra differ qualitatively between isotopes.« less

21 CFR 189.175 - P-4000.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 3 2014-04-01 2014-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) SUBSTANCES PROHIBITED FROM USE IN HUMAN FOOD Substances Generally Prohibited From Direct Addition or Use as Human Food § 189...

Temperature measurements in an ytterbium fiber amplifier up to the mode instability threshold

NASA Astrophysics Data System (ADS)

Beier, F.; Heinzig, M.; Sattler, Bettina; Walbaum, Till; Haarlammert, N.; Schreiber, T.; Eberhardt, R.; Tünnermann, A.

2016-03-01

We report on the measurement of the longitudinal temperature distribution in a fiber amplifier fiber during high power operation. The measurement signal of an optical frequency domain reflectometer is coupled to an ytterbium doped amplifier fiber via a wavelength division multiplexer. The longitudinal temperature distribution was examined for different pump powers with a sub mm resolution. The results show even small temperature variations induced by slight changes of the environmental conditions along the fiber. The mode instability threshold of the fiber under investigation was determined to be 480W and temperatures could be measured overall the measured output power values.

High-power Q-switched erbium-ytterbium codoped fiber laser using multiwalled carbon nanotubes saturable absorber

NASA Astrophysics Data System (ADS)

Ab Razak, Mohd Zulhakimi; Saleh, Zatul Saliza; Ahmad, Fauzan; Anyi, Carol Livan; Harun, Sulaiman W.; Arof, Hamzah

2016-10-01

Due to an enormous potential of pulsed lasers in applications such as manufacturing, metrology, environmental sensing, and biomedical diagnostics, a high-power and stable Q-switched erbium-ytterbium codoped double-clad fiber laser (EYDFL) incorporating of multiwall carbon nanotubes (MWCNTs) saturable absorber (SA) made based on polyvinyl alcohol (PVA) with a 3∶2 ratio is demonstrated. The SA was fabricated by mixing a dilute PVA solution with an MWCNTs homogeneous solution. Subsequently, the mixture was sonicated and centrifuged to produce a homogeneous suspension that was left to dry at room temperature to form the MWCNTs-PVA film. The SA was formed by inserting the film between a pair of FC/PC fiber connectors. Then, it was integrated into the EYDFL's ring cavity, which uses a 5-m-long erbium-ytterbium codoped fiber (EYDF). The lasing threshold for the Q-switched EYDFL was at 330 mW. At the maximum available pump power of 900 mW, the proposed EYDFL produced Q-switched pulses with a repetition rate of 74.85 kHz, pulsewidth of ˜3.6 μs, and an average output power of about 5 mW. The maximum energy per pulse of ˜85 nJ was obtained at pump power of ˜700 mW with peak power of 21 mW.

2 CFR 175.5 - Purpose of this part.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.5 Purpose of this part. This part establishes a...

33 CFR 175.110 - Visual distress signals required.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Visual distress signals required... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.110 Visual distress signals... signals selected from the list in § 175.130 or the alternatives in § 175.135, in the number required, are...

21 CFR 175.270 - Poly(vinyl fluoride) resins.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Poly(vinyl fluoride) resins. 175.270 Section 175... Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride... the purpose of this section, poly(vinyl fluoride) resins consist of basic resins produced by the...

21 CFR 175.270 - Poly(vinyl fluoride) resins.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175... Substances for Use as Components of Coatings § 175.270 Poly(vinyl fluoride) resins. Poly(vinyl fluoride... the purpose of this section, poly(vinyl fluoride) resins consist of basic resins produced by the...

33 CFR 175.110 - Visual distress signals required.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Visual distress signals required... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.110 Visual distress signals... signals selected from the list in § 175.130 or the alternatives in § 175.135, in the number required, are...

33 CFR 175.110 - Visual distress signals required.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Visual distress signals required... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.110 Visual distress signals... signals selected from the list in § 175.130 or the alternatives in § 175.135, in the number required, are...

33 CFR 175.110 - Visual distress signals required.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Visual distress signals required... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.110 Visual distress signals... signals selected from the list in § 175.130 or the alternatives in § 175.135, in the number required, are...

45 CFR 17.5 - Context to be reflected.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 45 Public Welfare 1 2012-10-01 2012-10-01 false Context to be reflected. 17.5 Section 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...

45 CFR 17.5 - Context to be reflected.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 45 Public Welfare 1 2014-10-01 2014-10-01 false Context to be reflected. 17.5 Section 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...

45 CFR 17.5 - Context to be reflected.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 45 Public Welfare 1 2013-10-01 2013-10-01 false Context to be reflected. 17.5 Section 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...

45 CFR 17.5 - Context to be reflected.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 45 Public Welfare 1 2010-10-01 2010-10-01 false Context to be reflected. 17.5 Section 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...

45 CFR 17.5 - Context to be reflected.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 45 Public Welfare 1 2011-10-01 2011-10-01 false Context to be reflected. 17.5 Section 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...

21 CFR 161.175 - Frozen raw breaded shrimp.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one..., other than those provided for in this paragraph, are not suitable ingredients of frozen raw breaded...

21 CFR 161.175 - Frozen raw breaded shrimp.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 2 2011-04-01 2011-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one..., other than those provided for in this paragraph, are not suitable ingredients of frozen raw breaded...

Core-pumped mode-locked ytterbium-doped fiber laser operating around 980 nm

NASA Astrophysics Data System (ADS)

Zhou, Yue; Dai, Yitang; Li, Jianqiang; Yin, Feifei; Dai, Jian; Zhang, Tian; Xu, Kun

2018-07-01

In this letter, we first demonstrate a core-pumped passively mode-locked all-normal-dispersion ytterbium-doped fiber oscillator based on nonlinear polarization evolution operating around 980 nm. The dissipative soliton fiber laser pulse can be compressed down to 250 fs with 1 nJ pulse energy, and the slope efficiency of the oscillator can be as high as 19%. To improve the dissipative soliton laser output spectrum smoothness, we replace the birefringent plate based intracavity filter with a diffraction-grating based filter. The output pulse duration can then be further compressed down to 180 fs with improved spectral-smoothness. These schemes have potential applications in seeding cryogenic Yb:YLF amplifiers and underwater exploration of marine resources.

47 CFR 90.175 - Frequency coordinator requirements.

Code of Federal Regulations, 2013 CFR

2013-10-01

... a frequency and/or transmitter site location. (18) Applications for base, mobile, or control... Section 90.175 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175...

47 CFR 90.175 - Frequency coordinator requirements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... a frequency and/or transmitter site location. (18) Applications for base, mobile, or control... Section 90.175 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175...

14 CFR 25.175 - Demonstration of static longitudinal stability.

Code of Federal Regulations, 2010 CFR

2010-01-01

... stability. 25.175 Section 25.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows: (a...

20 CFR 401.175 - Government Accountability Office.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Government Accountability Office. 401.175 Section 401.175 Employees' Benefits SOCIAL SECURITY ADMINISTRATION PRIVACY AND DISCLOSURE OF OFFICIAL... Office. We disclose information to the Government Accountability Office when that agency needs the...

20 CFR 401.175 - Government Accountability Office.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 20 Employees' Benefits 2 2011-04-01 2011-04-01 false Government Accountability Office. 401.175... RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government Accountability Office. We disclose information to the Government Accountability Office when that agency needs the...

47 CFR 90.175 - Frequency coordinator requirements.

Code of Federal Regulations, 2011 CFR

2011-10-01

... site location. (18) Applications for base, mobile, or control stations in the 763-768 MHz and 793-798... Section 90.175 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175...

47 CFR 90.175 - Frequency coordinator requirements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... site location. (18) Applications for base, mobile, or control stations in the 763-768 MHz and 793-798... Section 90.175 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175...

Erbium:ytterbium fiber-laser system delivering watt-level femtosecond pulses using divided pulse amplification

NASA Astrophysics Data System (ADS)

Herda, Robert; Zach, Armin

2015-03-01

We present an Erbium:Ytterbium codoped fiber-amplifer system based on Divided-Pulses-Amplification (DPA) for ultrashort pulses. The output from a saturable-absorber mode-locked polarization-maintaining (PM) fiber oscillator is amplified in a PM normal-dispersion Erbium-doped fiber. After this stage the pulses are positively chirped and have a duration of 2.0 ps at an average power of 93 mW. A stack of 5 birefringent Yttrium-Vanadate crystals divides these pulses 32 times. We amplify these pulses using a double-clad Erbium:Ytterbium codoped fiber pumped through a multimode fiber combiner. The pulses double pass the amplifier and recombine in the crystals using non-reciprocal polarization 90° rotation by a Faraday rotating mirror. Pulses with a duration of 144 fs are obtained after separation from the input beam using a polarizing beam splitter cube. These pulses have an average power of 1.85 W at a repetition rate of 80 MHz. The generation of femtosecond pulses directly from the amplifier was enabled by a positively chirped seed pulse, normally dispersive Yttrium-Vanadate crystals, and anomalously dispersive amplifier fibers. Efficient frequency doubling to 780 nm with an average power of 725 mW and a pulse duration of 156 fs is demonstrated. In summary we show a DPA setup that enables the generation of femtosecond pulses at watt-level at 1560 nm without the need for further external dechirping and demonstrate a good pulse quality by efficient frequency doubling. Due to the use of PM fiber components and a Faraday rotator the setup is environmentally stable.

19 CFR 191.175 - Drawback claimant; maintenance of records.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 19 Customs Duties 2 2010-04-01 2010-04-01 false Drawback claimant; maintenance of records. 191.175 Section 191.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) DRAWBACK Substitution of Finished Petroleum Derivatives § 191.175...

Study of nonlinear liquid effects into ytterbium-doped fiber laser for multi-wavelength generation

NASA Astrophysics Data System (ADS)

Lozano-Hernandez, T.; Jauregui-Vazquez, D.; Estudillo-Ayala, J.; Herrera-Piad, L. A.; Rojas-Laguna, R.; Hernandez-Garcia, J. M.; Sierra-Hernandez, J. M.

2018-02-01

We present an experimental study of liquid refractive index effects into Ytterbium ring fiber laser cavity configuration. The laser is operated using a bi-tapered optical fiber immersed in water-alcohol concentrations. When the tapered fiber is dipped into a distilled water, a single lasing line with a peak power centered at 1025 nm is achieved. Afterward, by changing the polarization state into the cavity the lasing line can be switched. Moreover, by modifying the refractive index liquid surrounding media the lasing lines can be controlled and special liquid provide nonlinear response. The laser offers compactness, low effective cost and good stability.

Generation of high-field terahertz pulses in an HMQ-TMS organic crystal pumped by an ytterbium laser at 1030 nm.

PubMed

Rovere, Andrea; Jeong, Young-Gyun; Piccoli, Riccardo; Lee, Seung-Heon; Lee, Seung-Chul; Kwon, O-Pil; Jazbinsek, Mojca; Morandotti, Roberto; Razzari, Luca

2018-02-05

We present the generation of high-peak-electric-field terahertz pulses via collinear optical rectification in a 2-(4-hydroxy-3-methoxystyryl)-1-methilquinolinium-2,4,6-trimethylbenzenesulfonate (HMQ-TMS) organic crystal. The crystal is pumped by an amplified ytterbium laser system, emitting 170-fs-long pulses centered at 1030 nm. A terahertz peak electric field greater than 200 kV/cm is obtained for 420 µJ of optical pump energy, with an energy conversion efficiency of 0.26% - about two orders of magnitude higher than in common inorganic crystals collinearly pumped by amplified femtosecond lasers. An open-aperture Z-scan measurement performed on an n-doped InGaAs thin film using such terahertz source shows a nonlinear increase in the terahertz transmission of about 2.2 times. Our findings demonstrate the potential of this terahertz generation scheme, based on ytterbium laser technology, as a simple and efficient alternative to the existing intense table-top terahertz sources. In particular, we show that it can be readily used to explore nonlinear effects at terahertz frequencies.

Fibre amplifier based on an ytterbium-doped active tapered fibre for the generation of megawatt peak power ultrashort optical pulses

DOE Office of Scientific and Technical Information (OSTI.GOV)

Koptev, M Yu; Anashkina, E A; Lipatov, D S

2015-05-31

We report a new ytterbium-doped active tapered fibre used in the output amplifier stage of a fibre laser system for the generation of megawatt peak power ultrashort pulses in the microjoule energy range. The tapered fibre is single-mode at its input end (core and cladding diameters of 10 and 80 μm) and multimode at its output end (diameters of 45 and 430 μm), but ultrashort pulses are amplified in a quasi-single-mode regime. Using a hybrid Er/Yb fibre system comprising an erbium master oscillator and amplifier at a wavelength near 1.5 μm, a nonlinear wavelength converter to the 1 μm rangemore » and a three-stage ytterbium-doped fibre amplifier, we obtained pulses of 1 μJ energy and 7 ps duration, which were then compressed by a grating-pair dispersion compressor with 60% efficiency to a 130 fs duration, approaching the transform-limited pulse duration. The present experimental data agree well with numerical simulation results for pulse amplification in the threestage amplifier. (extreme light fields and their applications)« less

Pulsed ytterbium-doped fibre laser with a combined modulator based on single-wall carbon nanotubes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Khudyakov, D V; Borodkin, A A; Vartapetov, S K

2015-09-30

This paper describes an all-normal-dispersion pulsed ytterbium-doped fibre ring laser mode-locked by a nonlinear combined modulator based on single-wall carbon nanotubes. We have demonstrated 1.7-ps pulse generation at 1.04 μm with a repetition rate of 35.6 MHz. At the laser output, the pulses were compressed to 180 fs. We have examined an intracavity nonlinear modulator which utilises nonlinear polarisation ellipse rotation in conjunction with a saturable absorber in the form of a polymer-matrix composite film containing single-wall carbon nanotubes. (lasers)

25 CFR 175.40 - Financing of extensions and upgrades.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 1 2010-04-01 2010-04-01 false Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility may...

Phosphate ytterbium-doped single-mode all-solid photonic crystal fiber with output power of 13.8 W

PubMed Central

Wang, Longfei; He, Dongbing; Feng, Suya; Yu, Chunlei; Hu, Lili; Qiu, Jianrong; Chen, Danping

2015-01-01

Single-mode ytterbium-doped phosphate all-solid photonic crystal fiber (AS-PCF) with 13.8 W output power and 32% slope efficiency was reported. By altering the diameter of the rods around the doped core and thus breaking the symmetry of the fiber, a polarization-maintaining AS-PCF with degree of polarization of >85% was also achieved, for the first time to knowledge, in a phosphate PCF. PMID:25684731

Multi-Wavelength Q-Switched Ytterbium-Doped Fiber Laser with Multi-Walled Carbon Nanotubes

NASA Astrophysics Data System (ADS)

Al-Masoodi, A. H. H.; Ahmed, M. H. M.; Arof, H.; Harun, S. W.

2018-03-01

We demonstrate a passively multi-wavelength Q-switched Ytterbium-doped fiber laser (YDFL) based on a multi-wall carbon nanotubes embedded in polyethylene oxide film as saturable absorber. The YDFL generates a stable multi-wavelength with spacing of 1.9 nm as the 980 nm pump power is fixed within 62. 4 mW and 78.0 mW. The repetition rate of the laser is tunable from 10.41 to 29.04 kHz by increasing the pump power from the threshold power of 62.4 mW to 78 mW. At 78 mW pump power, the maximum pulse energy of 38 nJ and the shortest pulse width of 8.87 µs are obtained.

Photoemission and Photoabsorption Investigation of the Electronic Structure of Ytterbium Doped Strontium Fluoroapatite

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nelson, A J; van Buuren, T; Bostedt, C

X-ray photoemission and x-ray photoabsorption were used to study the composition and the electronic structure of ytterbium doped strontium fluoroapatite (Yb:S-FAP). High resolution photoemission measurements on the valence band electronic structure was used to evaluate the density of occupied states of this fluoroapatite. Element specific density of unoccupied electronic states in Yb:S-FAP were probed by x-ray absorption spectroscopy (XAS) at the Yb 4d (N{sub 4,5}-edge), Sr 3d (M{sub 4,5}-edge), P 2p (L{sub 2,3}-edge), F 1s and O 1s (K-edges) absorption edges. These results provide the first measurements of the electronic structure and surface chemistry of this material.

Control of pulse format in high energy per pulse all-fiber erbium/ytterbium laser systems

NASA Astrophysics Data System (ADS)

Klopfer, Michael; Block, Matthew K.; Deffenbaugh, James; Fitzpatrick, Zak G.; Urioste, Michael T.; Henry, Leanne J.; Jain, Ravinder

2017-02-01

A multi-stage linearly polarized (PM) (15 dB) pulsed fiber laser system at 1550 nm capable of operating at repetition rates between 3 and 20 kHz was investigated. A narrow linewidth seed source was linewidth broadened to approximately 20 GHz and pulses were created and shaped via an electro-optic modulator (EOM) in conjunction with a home built arbitrary waveform generator. As expected, a high repetition rate pulse train with a near diffraction limited beam quality (M2 1.12) was achieved. However, the ability to store energy was limited by the number of active ions within the erbium/ytterbium doped gain fiber within the various stages. As a result, the maximum energy per pulse achievable from the system was approximately 0.3 and 0.38 mJ for 300 ns and 1 μs pulses, respectively, at 3 kHz. Because the system was operated at high inversion, the erbium/ytterbium doped optical fiber preferred to lase at 1535 nm versus 1550 nm resulting in amplified spontaneous emission (ASE) both intra- and inter-pulse. For the lower power stages, the ASE was controllable via a EOM whose function was to block the energy between pulses as well as ASE filters whose purpose was to block spectral components outside of the 1550 nm passband. For the higher power stages, the pump diodes were pulsed to enable strategic placement of an inversion resulting in higher intrapulse energies as well as an improved spectrum of the signal. When optimized, this system will be used to seed higher power solid state amplifier stages.

Investigation of the vapour-plasma plume in the welding of titanium by high-power ytterbium fibre laser radiation

NASA Astrophysics Data System (ADS)

Bykovskiy, D. P.; Petrovskii, V. N.; Uspenskiy, S. A.

2015-03-01

The vapour-plasma plume produced in the welding of 6-mm thick VT-23 titanium alloy plates by ytterbium fibre laser radiation of up to 10 kW power is studied in the protective Ar gas medium. High-speed video filming of the vapour-plasma plume is used to visualise the processes occurring during laser welding. The coefficient of inverse bremsstrahlung by the welding plasma plume is calculated from the data of the spectrometric study.

A luminescent ytterbium(III)-organic framework for highly selective sensing of 2,4,6-trinitrophenol

NASA Astrophysics Data System (ADS)

Xin, Xuelian; Zhang, Minghui; Ji, Shijie; Dong, Hanxiao; Zhang, Liangliang

2018-06-01

An ytterbium(III)-organic framework, [Yb4(abtc)3(HCOO) (H2O)]·(C2H8N) (H2O) (UPC-22, H4abtc = 3,3‧,5,5‧-azobenzene-tetracarboxylic acid) was synthesized under solvothermal conditions and characterized. UPC-22 exhibited strong H4abtc-based luminescence and can be used for sensing nitroaromatic compounds (NACs) in an ethanol suspension with outstanding selectivity and sensitivity. The most striking property of UPC-22 is its ability to selectively detect 2,4,6-trinitrophenol (TNP), thereby rendering it a promising TNP-selective luminescence probe.

46 CFR 175.600 - Incorporation by reference.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Vessels Under 61 Meters (200 feet) in Length, 1983 (“ABS Steel Vessel Rules (Meters)”) 177.300. Rules..., Standard Practice for Operating Salt Spray (Fog) Apparatus (“ASTM B 117”) 175.400. ASTM B 122/B 122M-95... (“ASTM D 93”) 175.400. ASTM D 635-97, Standard test Method for Rate of Burning and or Extent and Time of...

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

Code of Federal Regulations, 2012 CFR

2012-10-01

... 50 Wildlife and Fisheries 11 2012-10-01 2012-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 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...

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

Code of Federal Regulations, 2011 CFR

2011-10-01

... 50 Wildlife and Fisheries 9 2011-10-01 2011-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 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...

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

Code of Federal Regulations, 2014 CFR

2014-10-01

... 50 Wildlife and Fisheries 11 2014-10-01 2014-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 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...

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

Code of Federal Regulations, 2013 CFR

2013-10-01

... 50 Wildlife and Fisheries 11 2013-10-01 2013-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 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...

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

Code of Federal Regulations, 2010 CFR

2010-10-01

... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 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...

Electronic Structure of Ytterbium-Doped Strontium Fluoroapatite: Photoemission and Photoabsorption Investigation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nelson, Art J.; Van Buuren, Tony W.; Bostedt, C

X-ray photoemission and x-ray photoabsorption were used to study the composition and the electronic structure of ytterbium-doped strontium fluoroapatite (Yb:S-FAP). High resolution photoemission measurements on the valence band electronic structure and Sr 3d, P 2p and 2s, Yb 4d and 4p, F 1s and O 1s core lines were used to evaluate the surface and near surface chemistry of this fluoroapatite. Element specific density of unoccupied electronic states in Yb:S-FAP were probed by x-ray absorption spectroscopy (XAS) at the Yb 4d (N4,5-edge), Sr 3d (M4,5-edge), P 2p (L2,3-edge), F 1s and O 1s (K-edges) absorption edges. These results provide themore » first measurements of the electronic structure and surface chemistry of this material.« less

21 CFR 175.210 - Acrylate ester copolymer coating.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Acrylate ester copolymer coating. 175.210 Section... COATINGS Substances for Use as Components of Coatings § 175.210 Acrylate ester copolymer coating. Acrylate...) The acrylate ester copolymer is a fully polymerized copolymer of ethyl acrylate, methyl methacrylate...

2 CFR 175.5 - Purpose of this part.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 2 Grants and Agreements 1 2013-01-01 2013-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD...

2 CFR 175.5 - Purpose of this part.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 2 Grants and Agreements 1 2012-01-01 2012-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS NATIONAL POLICY REQUIREMENTS AWARD...

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 1 2011-10-01 2011-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity of...

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 1 2012-10-01 2012-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity of...

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 1 2014-10-01 2014-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity of...

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity of...

46 CFR 7.175 - Alaska Peninsula, AK to Nunivak, AK.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 1 2013-10-01 2013-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity of...

2 CFR 175.5 - Purpose of this part.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 2 Grants and Agreements 1 2014-01-01 2014-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING...

2 CFR 175.5 - Purpose of this part.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS [Reserved] AWARD TERM FOR TRAFFICKING...

Investigation of the vapour-plasma plume in the welding of titanium by high-power ytterbium fibre laser radiation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bykovskiy, D P; Petrovskii, V N; Uspenskiy, S A

2015-03-31

The vapour-plasma plume produced in the welding of 6-mm thick VT-23 titanium alloy plates by ytterbium fibre laser radiation of up to 10 kW power is studied in the protective Ar gas medium. High-speed video filming of the vapour-plasma plume is used to visualise the processes occurring during laser welding. The coefficient of inverse bremsstrahlung by the welding plasma plume is calculated from the data of the spectrometric study. (interaction of laser radiation with matter)

25 CFR 17.5 - Minors represented at hearings.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 1 2011-04-01 2011-04-01 false Minors represented at hearings. 17.5 Section 17.5 Indians... Minors represented at hearings. Minor heirs at law, who by the terms of the will are devised a lesser... approval of the special attorney, be represented at the hearing by guardians ad litem. Such minors 14 years...

25 CFR 17.5 - Minors represented at hearings.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 1 2010-04-01 2010-04-01 false Minors represented at hearings. 17.5 Section 17.5 Indians... Minors represented at hearings. Minor heirs at law, who by the terms of the will are devised a lesser... approval of the special attorney, be represented at the hearing by guardians ad litem. Such minors 14 years...

Spectral diagnostics of a vapor-plasma plume produced during welding titanium with a high-power ytterbium fiber laser

NASA Astrophysics Data System (ADS)

Uspenskiy, S. A.; Petrovskiy, V. N.; Bykovskiy, D. P.; Mironov, V. D.; Prokopova, N. M.; Tret'yakov, E. V.

2015-03-01

This work is devoted to the research of welding plume during high power ytterbium fiber laser welding of a titanium alloy in the Ar shielding gas environment. High speed video observation of a vapor-plasma plume for visualization of processes occurring at laser welding was carried out. The coefficient of the inverse Bremsstrahlung absorption of laser radiation is calculated for a plasma welding plume by results of spectrometer researches. The conclusion deals with the impact of plasma on a high-power fiber laser radiation.

25 CFR 175.61 - Appeals to the Interior Board of Indian Appeals.

Code of Federal Regulations, 2010 CFR

2010-04-01

... POWER UTILITIES Appeals § 175.61 Appeals to the Interior Board of Indian Appeals. (a) An Area Director's decision under this part, except a decision under § 175.11 or 175.13, may be appealed to the Office of... that a notice of appeal from a decision under § 175.12 shall be filed within 30 days of publication of...

50 CFR 216.175 - Requirements for monitoring and reporting.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 50 Wildlife and Fisheries 10 2013-10-01 2013-10-01 false Requirements for monitoring and reporting. 216.175 Section 216.175 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS REGULATIONS GOVERNING THE TAKING AND...

50 CFR 216.175 - Requirements for monitoring and reporting.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 50 Wildlife and Fisheries 10 2012-10-01 2012-10-01 false Requirements for monitoring and reporting. 216.175 Section 216.175 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS REGULATIONS GOVERNING THE TAKING AND...

Development of trivalent ytterbium doped fluorapatites for diode-pumped laser applications

NASA Astrophysics Data System (ADS)

Bayramian, Andrew James

2000-11-01

A major motivator of this work is the Mercury Project, a one kilowatt diode-pumped solid-state laser system under development at Lawrence Livermore National Laboratory (LLNL), which incorporates ytterbium doped strontium fluorapatite, Sr5(PO4)3F (S-FAP), as the amplifier gain medium. The primary focus of this thesis is a full understanding of the properties of this material, which is necessary for proper design and modeling of the system. Ytterbium-doped fluorapatites were investigated at LLNL prior to this work and found to be ideal candidate materials for high-power amplifier systems providing high absorption and emission cross sections, long radiative lifetimes, and high efficiency. A family of barium substituted S-FAP crystals was grown in an effort to modify the pump and emission bandwidths for application to broadband diode pumping and short pulse generation. Crystals of Yb 3+:Srs5-xBax(PO4) 3F where x < 1 showed homogeneous lines offering 8.4 nm (1.8X enhancement) of absorption bandwidth and 6.9 nm (1.4X enhancement) of emission bandwidth. The gain saturation fluence of Yb:S-FAP was measured to be 3.2 J/cm 2 with homogeneous extraction using a pump-probe experiment where the probe laser was a high intensity Q-switched master oscillator power amplifier system. The crystal quality of Czochralski grown Yb:S-FAP boules, which is effected by defects such as cracking, cloudiness, bubble core, slip dislocations, and anomalous absorption, was investigated interferometrically and quantified by means of Power Spectral Density (PSD) plots. Stimulated Raman Scattering (SRS) losses were evaluated by first measuring the SRS gain coefficient to be 1.3 cm/GW, then modeling the losses in the Mercury amplifier system. Countermeasures including the addition of bandwidth to the extraction beam and wedging of amplifier surfaces are shown to reduce the SRS losses allowing efficient laser gain extraction at higher intensities. Finally, an efficient Q-switched Yb:S-FAP oscillator

14 CFR 23.175 - Demonstration of static longitudinal stability.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... must be shown as follows: (a) Climb. The stick force curve must have a stable slope at speeds between...

14 CFR 23.175 - Demonstration of static longitudinal stability.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Demonstration of static longitudinal stability. 23.175 Section 23.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... must be shown as follows: (a) Climb. The stick force curve must have a stable slope at speeds between...

21 CFR 175.230 - Hot-melt strippable food coatings.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

21 CFR 175.230 - Hot-melt strippable food coatings.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

21 CFR 175.230 - Hot-melt strippable food coatings.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Vinyl acetate/crotonic acid copolymer. 175.350 Section 175.350 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

Stabilized and tunable single-longitudinal-mode erbium fiber laser employing ytterbium-doped fiber based interference filter

NASA Astrophysics Data System (ADS)

Yeh, Chien-Hung; Tsai, Ning; Zhuang, Yuan-Hong; Chow, Chi-Wai; Chen, Jing-Heng

2017-02-01

In this demonstration, to achieve stabilized and wavelength-selectable single-longitudinal-mode (SLM) erbium-doped fiber (EDF) laser, a short length of ytterbium-doped fiber (YDF) is utilized to serve as a spatial multi-mode interference (MMI) inside a fiber cavity for suppressing multi-longitudinal-mode (MLM) significantly. In the measurement, the output powers and optical signal to noise ratios (OSNRs) of proposed EDF ring laser are measured between -9.85 and -5.71 dBm; and 38.03 and 47.95 dB, respectively, in the tuning range of 1530.0-1560.0 nm. In addition, the output SLM and stability performance are also analyzed and discussed experimentally.

Redox properties of samarium, europium and ytterbium in molten eutectic mixture of sodium, potassium and cesium chlorides

NASA Astrophysics Data System (ADS)

Golovanova, O. A.; Tropin, O. A.; Volkovich, V. A.

2017-09-01

The redox behavior of samarium, europium and ytterbium ions was investigated in the ternary 6NaCl-9KCl- 5CsCl eutectic based melts between 823 and 1073 K employing cyclic voltammetry on a tungsten working electrode. Ln(II)/Ln(III) (Ln=Sm, Eu, Yb) reduction-oxidation is reversible and controlled by diffusion of the electroactive species at the potential scan rates up to 0.1 V/s. Formal standard redox potentials E*Ln(II)/Ln(III) were determined, and the thermodynamic and transport properties of the corresponding Ln(III) and Ln(II) ions were estimated.

21 CFR 175.230 - Hot-melt strippable food coatings.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food 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...

18 CFR 367.1750 - Account 175, Derivative instrument assets.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 18 Conservation of Power and Water Resources 1 2011-04-01 2011-04-01 false Account 175, Derivative... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175, Derivative instrument assets. This account must include the amounts paid for derivative instruments, and the change in...

27 CFR 53.175 - Readjustment for local advertising charges.

Code of Federal Regulations, 2010 CFR

2010-04-01

... television station, or appears in a newspaper or magazine, or is displayed by means of an outdoor advertising... advertising charges. 53.175 Section 53.175 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND... Readjustment for local advertising charges. (a) In general. If a manufacturer has paid the tax imposed by...

Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

NASA Technical Reports Server (NTRS)

Good, Brian S.

2015-01-01

Silicon-based ceramic components for next-generation jet turbine engines offer potential weight savings, as well as higher operating temperatures, both of which lead to increased efficiency and lower fuel costs. Silicon carbide (SiC), in particular, offers low density, good strength at high temperatures, and good oxidation resistance in dry air. However, reaction of SiC with high-temperature water vapor, as found in the hot section of jet turbine engines in operation, can cause rapid surface recession, which limits the lifetime of such components. Environmental Barrier Coatings (EBCs) are therefore needed if long component lifetime is to be achieved. Rare earth silicates such as Yb2Si2O7 and Yb2SiO5 have been proposed for such applications; in an effort to better understand diffusion in such materials, we have performed kinetic Monte Carlo (kMC) simulations of oxygen diffusion in Ytterbium disilicate, Yb2- Si2O7. The diffusive process is assumed to take place via the thermally activated hopping of oxygen atoms among oxygen vacancy sites or among interstitial sites. Migration barrier energies are computed using density functional theory (DFT).

Spin-orbit-coupled Fermi gases of two-electron ytterbium atoms

NASA Astrophysics Data System (ADS)

He, Chengdong; Song, Bo; Haciyev, Elnur; Ren, Zejian; Seo, Bojeong; Zhang, Shanchao; Liu, Xiong-Jun; Jo, Gyu-Boong

2017-04-01

Spin-orbit coupling (SOC) has been realized in bosonic and fermionic atomic gases opening an avenue to novel physics associated with spin-momentum locking. In this talk, we will demonstrate all-optical method coupling two hyperfine ground states of 173Yb fermions through a narrow optical transition 1S0 -> 3P1. An optical AC Stark shift is applied to split the ground hyperfine levels and separate out an effective spin-1/2 subspace from other spin states for the realization of SOC. The spin dephasing dynamics and the asymmetric momentum distribution of the spin-orbit coupled Fermi gas are observed as a hallmark of SOC. The implementation of all-optical SOC for ytterbium fermions should offer a new route to a long-lived spin-orbit coupled Fermi gas and greatly expand our capability in studying novel spin-orbit physics with alkaline-earth-like atoms. Other ongoing experimental works related to SOC will be also discussed. Funded by Croucher Foundation and Research Grants Council (RGC) of Hong Kong (Project ECS26300014, GRF16300215, GRF16311516, and Croucher Innovation Grants); MOST (Grant No. 2016YFA0301604) and NSFC (No. 11574008).

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

Code of Federal Regulations, 2010 CFR

2010-10-01

... electricity from renewable energy sources. 217.175 Section 217.175 Federal Acquisition Regulations System... SPECIAL CONTRACTING METHODS Mulityear Contracting 217.175 Multiyear contracts for electricity from... not to exceed 10 years for the purchase of electricity from sources of renewable energy, as that term...

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

Code of Federal Regulations, 2013 CFR

2013-01-01

... 7 Agriculture 15 2013-01-01 2013-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture... GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance...

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

Code of Federal Regulations, 2014 CFR

2014-01-01

... 7 Agriculture 15 2014-01-01 2014-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture... GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 15 2011-01-01 2011-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture... GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance...

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

Code of Federal Regulations, 2012 CFR

2012-01-01

... 7 Agriculture 15 2012-01-01 2012-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture... GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance...

21 CFR 175.230 - Hot-melt strippable food coatings.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Hot-melt strippable food coatings. 175.230 Section... COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food coatings. Hot-melt..., white For use only as a component of hot-melt strippable food coatings applied to frozen meats and...

Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms

DOE Office of Scientific and Technical Information (OSTI.GOV)

Hosoya, Toshiyuki; Miranda, Martin; Inoue, Ryotaro

2015-07-15

We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources formore » laser cooling experiments including transportable optical lattice clocks.« less

End-pumped 300 W continuous-wave ytterbium-doped all-fiber laser with master oscillator multi-stage power amplifiers configuration.

PubMed

Yin, Shupeng; Yan, Ping; Gong, Mali

2008-10-27

An end-pumped ytterbium-doped all-fiber laser with 300 W output in continuous regime was reported, which was based on master oscillator multi-stage power amplifiers configuration. Monolithic fiber laser system consisted of an oscillator stage and two amplifier stages. Total optical-optical efficiency of monolithic fiber laser was approximately 65%, corresponding to 462 W of pump power coupled into laser system. We proposed a new method to connect power amplifier stage, which was crucial for the application of end-pumped combiner in high power MOPAs all-fiber laser.

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

PubMed

Mukhopadhyay, Pranab K; Gupta, Pradeep K; Singh, Amarjeet; Sharma, Sunil K; Bindra, Kushvinder S; Oak, Shrikant M

2014-05-01

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.

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

NASA Astrophysics Data System (ADS)

Mukhopadhyay, Pranab K.; Gupta, Pradeep K.; Singh, Amarjeet; Sharma, Sunil K.; Bindra, Kushvinder S.; Oak, Shrikant M.

2014-05-01

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.

Parameters for the RM1 Quantum Chemical Calculation of Complexes of the Trications of Thulium, Ytterbium and Lutetium

PubMed Central

Filho, Manoel A. M.; Dutra, José Diogo L.; Rocha, Gerd B.; Simas, Alfredo M.

2016-01-01

The RM1 quantum chemical model for the calculation of complexes of Tm(III), Yb(III) and Lu(III) is advanced. Subsequently, we tested the models by fully optimizing the geometries of 126 complexes. We then compared the optimized structures with known crystallographic ones from the Cambridge Structural Database. Results indicate that, for thulium complexes, the accuracy in terms of the distances between the lanthanide ion and its directly coordinated atoms is about 2%. Corresponding results for ytterbium and lutetium are both 3%, levels of accuracy useful for the design of lanthanide complexes, targeting their countless applications. PMID:27223475

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

DOE Office of Scientific and Technical Information (OSTI.GOV)

Mukhopadhyay, Pranab K., E-mail: pkm@rrcat.gov.in; Gupta, Pradeep K.; Singh, Amarjeet

2014-05-15

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.

26 CFR 1.175-6 - Adoption or change of method.

Code of Federal Regulations, 2011 CFR

2011-04-01

... the method of treating expenditures for soil or water conservation as expenses for the first taxable... or water conservation expenditures described in section 175(a) are paid or incurred. Such adoption... soil and water conservation expenditures as provided by section 175 for any taxable year to which the...

26 CFR 1.175-6 - Adoption or change of method.

Code of Federal Regulations, 2014 CFR

2014-04-01

... the method of treating expenditures for soil or water conservation as expenses for the first taxable... or water conservation expenditures described in section 175(a) are paid or incurred. Such adoption... soil and water conservation expenditures as provided by section 175 for any taxable year to which the...

26 CFR 1.175-6 - Adoption or change of method.

Code of Federal Regulations, 2013 CFR

2013-04-01

... the method of treating expenditures for soil or water conservation as expenses for the first taxable... or water conservation expenditures described in section 175(a) are paid or incurred. Such adoption... soil and water conservation expenditures as provided by section 175 for any taxable year to which the...

26 CFR 1.175-6 - Adoption or change of method.

Code of Federal Regulations, 2012 CFR

2012-04-01

... the method of treating expenditures for soil or water conservation as expenses for the first taxable... or water conservation expenditures described in section 175(a) are paid or incurred. Such adoption... soil and water conservation expenditures as provided by section 175 for any taxable year to which the...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

Dual-Mode Operation of an Optical Lattice Clock Using Strontium and Ytterbium Atoms.

PubMed

Akamatsu, Daisuke; Kobayashi, Takumi; Hisai, Yusuke; Tanabe, Takehiko; Hosaka, Kazumoto; Yasuda, Masami; Hong, Feng-Lei

2018-06-01

We have developed an optical lattice clock that can operate in dual modes: a strontium (Sr) clock mode and an ytterbium (Yb) clock mode. Dual-mode operation of the Sr-Yb optical lattice clock is achieved by alternately cooling and trapping 87 Sr and 171 Yb atoms inside the vacuum chamber of the clock. Optical lattices for Sr and Yb atoms were arranged with horizontal and vertical configurations, respectively, resulting in a small distance of the order of between the trapped Sr and Yb atoms. The 1 S 0 - 3 P 0 clock transitions in the trapped atoms were interrogated in turn and the clock lasers were stabilized to the transitions. We demonstrated the frequency ratio measurement of the Sr and Yb clock transitions by using the dual-mode operation of the Sr-Yb optical lattice clock. The dual-mode operation can reduce the uncertainty of the blackbody radiation shift in the frequency ratio measurement, because both Sr and Yb atoms share the same blackbody radiation.

Un nouveau cristal laser largement accordable le BOYS dopé à l'ytterbium

NASA Astrophysics Data System (ADS)

Chénais, S.; Druon, F.; Balembois, F.; Georges, P.; Gaumé, R.; Aka, G.; Viana, B.; Vivien, D.

2002-06-01

Nous avons étudié les performances laser en pompage par diode de puissance d'un nouveau cristal : le Sr3Y(BO3)3 (acronyme : BOYS), dopé à l'ytterbium. Son spectre d'émission particulièrement large en fait un matériau particulièrement prometteur pour la réalisation de lasers femtosecondes directement pompés par diode. Ses performances ont été comparées à celles d'un verre phosphate ainsi qu'à celles du cristal d' Yb:GdCOB dans les mêmes conditions. Nous démontrons que, tant du point de vue de l'efficacité laser que de la tenue aux fortes puissances, GdCOB et BOYS sont supérieurs au verre ; le BOYS est de surcroît plus accordable (sur 50 nm), mais son comportement thermique limite a priori son usage à des puissances de pompe modérées.

The lysosomal potassium channel TMEM175 adopts a novel tetrameric architecture.

PubMed

Lee, Changkeun; Guo, Jiangtao; Zeng, Weizhong; Kim, Sunghoon; She, Ji; Cang, Chunlei; Ren, Dejian; Jiang, Youxing

2017-07-27

TMEM175 is a lysosomal K + channel that is important for maintaining the membrane potential and pH stability in lysosomes. It contains two homologous copies of a six-transmembrane-helix (6-TM) domain, which has no sequence homology to the canonical tetrameric K + channels and lacks the TVGYG selectivity filter motif found in these channels. The prokaryotic TMEM175 channel, which is present in a subset of bacteria and archaea, contains only a single 6-TM domain and functions as a tetramer. Here, we present the crystal structure of a prokaryotic TMEM175 channel from Chamaesiphon minutus, CmTMEM175, the architecture of which represents a completely different fold from that of canonical K + channels. All six transmembrane helices of CmTMEM175 are tightly packed within each subunit without undergoing domain swapping. The highly conserved TM1 helix acts as the pore-lining inner helix, creating an hourglass-shaped ion permeation pathway in the channel tetramer. Three layers of hydrophobic residues on the carboxy-terminal half of the TM1 helices form a bottleneck along the ion conduction pathway and serve as the selectivity filter of the channel. Mutagenesis analysis suggests that the first layer of the highly conserved isoleucine residues in the filter is primarily responsible for channel selectivity. Thus, the structure of CmTMEM175 represents a novel architecture of a tetrameric cation channel whose ion selectivity mechanism appears to be distinct from that of the classical K + channel family.

47 CFR 17.5 - Commission consideration of applications for station authorization.

Code of Federal Regulations, 2012 CFR

2012-10-01

... station authorization. 17.5 Section 17.5 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL... of applications for station authorization. (a) Applications for station authorization, excluding... required, the registrant must supply the structure's registration number upon request by the Commission. (c...

47 CFR 17.5 - Commission consideration of applications for station authorization.

Code of Federal Regulations, 2011 CFR

2011-10-01

... station authorization. 17.5 Section 17.5 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL... of applications for station authorization. (a) Applications for station authorization, excluding... required, the registrant must supply the structure's registration number upon request by the Commission. (c...

47 CFR 17.5 - Commission consideration of applications for station authorization.

Code of Federal Regulations, 2013 CFR

2013-10-01

... station authorization. 17.5 Section 17.5 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL... of applications for station authorization. (a) Applications for station authorization, excluding... required, the registrant must supply the structure's registration number upon request by the Commission. (c...

47 CFR 17.5 - Commission consideration of applications for station authorization.

Code of Federal Regulations, 2014 CFR

2014-10-01

... station authorization. 17.5 Section 17.5 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL... of applications for station authorization. (a) Applications for station authorization, excluding... required, the registrant must supply the structure's registration number upon request by the Commission. (c...

47 CFR 17.5 - Commission consideration of applications for station authorization.

Code of Federal Regulations, 2010 CFR

2010-10-01

... station authorization. 17.5 Section 17.5 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL... of applications for station authorization. (a) Applications for station authorization, excluding... required, the registrant must supply the structure's registration number upon request by the Commission. (c...

Scaling up the precision in a ytterbium Bose-Einstein condensate interferometer

NASA Astrophysics Data System (ADS)

McAlpine, Katherine; Plotkin-Swing, Benjamin; Gochnauer, Daniel; Saxberg, Brendan; Gupta, Subhadeep

2016-05-01

We report on progress toward a high-precision ytterbium (Yb) Bose-Einstein condensate (BEC) interferometer, with the goal of measuring h/m and thus the fine structure constant α. Here h is Planck's constant and m is the mass of a Yb atom. The use of the non-magnetic Yb atom makes our experiment insensitive to magnetic field noise. Our chosen symmetric 3-path interferometer geometry suppresses errors from vibration, rotation, and acceleration. The precision scales with the phase accrued due to the kinetic energy difference between the interferometer arms, resulting in a quadratic sensitivity to the momentum difference. We are installing and testing the laser pulses for large momentum transfer via Bloch oscillations. We will report on Yb BEC production in a new apparatus and progress toward realizing the atom optical elements for high precision measurements. We will also discuss approaches to mitigate two important systematics: (i) atom interaction effects can be suppressed by creating the BEC in a dynamically shaped optical trap to reduce the density; (ii) diffraction phase effects from the various atom-optical elements can be accounted for through an analysis of the light-atom interaction for each pulse.

Optical gain measurements in porous silicon planar waveguides codoped by erbium and ytterbium ions at 1.53 μm

NASA Astrophysics Data System (ADS)

Najar, Adel; Charrier, Joël; Lorrain, Nathalie; Haji, Lazhar; Oueslati, Mehrezi

2007-09-01

The on-off optical gain measurements as a function of the pump power were performed on porous silicon planar waveguides codoped by erbium and ytterbium ions. These measurements were obtained for different ratios of Yb concentration to Er concentration. The highest value of the gain was reached when the Yb concentration is three times higher than that of Er at a moderate 980nm pump power value equal to 70mW. Optical losses measurements have been performed on these waveguides and were equal to 2.1dB/cm and an internal gain of about 6.4dB/cm was obtained.

49 CFR 192.175 - Pipe-type and bottle-type holders.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 3 2011-10-01 2011-10-01 false Pipe-type and bottle-type holders. 192.175 Section....175 Pipe-type and bottle-type holders. (a) Each pipe-type and bottle-type holder must be designed so... equipment, that might cause corrosion or interfere with the safe operation of the holder. (b) Each pipe-type...

49 CFR 192.175 - Pipe-type and bottle-type holders.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 3 2010-10-01 2010-10-01 false Pipe-type and bottle-type holders. 192.175 Section....175 Pipe-type and bottle-type holders. (a) Each pipe-type and bottle-type holder must be designed so... equipment, that might cause corrosion or interfere with the safe operation of the holder. (b) Each pipe-type...

27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

Code of Federal Regulations, 2012 CFR

2012-04-01

... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in Puerto...

27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

Code of Federal Regulations, 2013 CFR

2013-04-01

... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in Puerto...

27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

Code of Federal Regulations, 2014 CFR

2014-04-01

... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in Puerto...

27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

Code of Federal Regulations, 2010 CFR

2010-04-01

... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in Puerto...

27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

Code of Federal Regulations, 2011 CFR

2011-04-01

... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in Puerto...

Electronic structure of ytterbium-implanted GaN at ambient and high pressure: experimental and crystal field studies.

PubMed

Kaminska, A; Ma, C-G; Brik, M G; Kozanecki, A; Boćkowski, M; Alves, E; Suchocki, A

2012-03-07

The results of high-pressure low-temperature optical measurements in a diamond-anvil cell of bulk gallium nitride crystals implanted with ytterbium are reported in combination with crystal field calculations of the Yb(3+) energy levels. Crystal field analysis of splitting of the (2)F(7/2) and (2)F(5/2) states has been performed, with the aim of assigning all features of the experimental luminescence spectra. A thorough analysis of the pressure behavior of the Yb(3+) luminescence lines in GaN allowed the determination of the ambient-pressure positions and pressure dependence of the Yb(3+) energy levels in the trigonal crystal field as well as the pressure-induced changes of the spin-orbit coupling coefficient.

49 CFR 175.501 - Special requirements for oxidizers and compressed oxygen.

Code of Federal Regulations, 2012 CFR

2012-10-01

... oxygen. 175.501 Section 175.501 Transportation Other Regulations Relating to Transportation PIPELINE AND... Special requirements for oxidizers and compressed oxygen. (a) Compressed oxygen, when properly labeled Oxidizer or Oxygen, may be loaded and transported as provided in this section. Except for Oxygen...

49 CFR 175.501 - Special requirements for oxidizers and compressed oxygen.

Code of Federal Regulations, 2014 CFR

2014-10-01

... oxygen. 175.501 Section 175.501 Transportation Other Regulations Relating to Transportation PIPELINE AND... Special requirements for oxidizers and compressed oxygen. (a) Compressed oxygen, when properly labeled Oxidizer or Oxygen, may be loaded and transported as provided in this section. Except for Oxygen...

49 CFR 175.501 - Special requirements for oxidizers and compressed oxygen.

Code of Federal Regulations, 2010 CFR

2010-10-01

... oxygen. 175.501 Section 175.501 Transportation Other Regulations Relating to Transportation PIPELINE AND... Special requirements for oxidizers and compressed oxygen. (a) Compressed oxygen, when properly labeled Oxidizer or Oxygen, may be loaded and transported as provided in this section. Except for Oxygen...

49 CFR 175.501 - Special requirements for oxidizers and compressed oxygen.

Code of Federal Regulations, 2013 CFR

2013-10-01

... oxygen. 175.501 Section 175.501 Transportation Other Regulations Relating to Transportation PIPELINE AND... Special requirements for oxidizers and compressed oxygen. (a) Compressed oxygen, when properly labeled Oxidizer or Oxygen, may be loaded and transported as provided in this section. Except for Oxygen...

49 CFR 175.501 - Special requirements for oxidizers and compressed oxygen.

Code of Federal Regulations, 2011 CFR

2011-10-01

... oxygen. 175.501 Section 175.501 Transportation Other Regulations Relating to Transportation PIPELINE AND... Special requirements for oxidizers and compressed oxygen. (a) Compressed oxygen, when properly labeled Oxidizer or Oxygen, may be loaded and transported as provided in this section. Except for Oxygen...

Efficient single-mode operation of a cladding-pumped ytterbium-doped helical-core fiber laser.

PubMed

Wang, P; Cooper, L J; Sahu, J K; Clarkson, W A

2006-01-15

A novel approach to achieving robust single-spatial-mode operation of cladding-pumped fiber lasers with multimode cores is reported. The approach is based on the use of a fiber geometry in which the core has a helical trajectory within the inner cladding to suppress laser oscillation on higher-order modes. In a preliminary proof-of-principle study, efficient single-mode operation of a cladding-pumped ytterbium-doped helical-core fiber laser with a 30 microm diameter core and a numerical aperture of 0.087 has been demonstrated. The laser yielded 60.4 W of output at 1043 nm in a beam with M2 < 1.4 for 92.6 W launched pump power from a diode stack at 976 nm. The slope efficiency at pump powers well above threshold was approximately 84%, which compares favorably with the slope efficiencies achievable with conventional straight-core Yb-doped double-clad fiber lasers.

40 CFR 60.175 - Monitoring of operations.

Code of Federal Regulations, 2010 CFR

2010-07-01

... (CONTINUED) STANDARDS OF 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...

43 CFR 30.175 - When does a purchased interest vest in the purchaser?

Code of Federal Regulations, 2010 CFR

2010-10-01

... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false When does a purchased interest vest in the purchaser? 30.175 Section 30.175 Public Lands: Interior Office of the Secretary of the Interior INDIAN PROBATE HEARINGS PROCEDURES Purchase at Probate § 30.175 When does a purchased interest vest in the...

43 CFR 30.175 - When does a purchased interest vest in the purchaser?

Code of Federal Regulations, 2011 CFR

2011-10-01

... 43 Public Lands: Interior 1 2011-10-01 2011-10-01 false When does a purchased interest vest in the purchaser? 30.175 Section 30.175 Public Lands: Interior Office of the Secretary of the Interior INDIAN PROBATE HEARINGS PROCEDURES Purchase at Probate § 30.175 When does a purchased interest vest in the...

43 CFR 30.175 - When does a purchased interest vest in the purchaser?

Code of Federal Regulations, 2014 CFR

2014-10-01

... 43 Public Lands: Interior 1 2014-10-01 2014-10-01 false When does a purchased interest vest in the purchaser? 30.175 Section 30.175 Public Lands: Interior Office of the Secretary of the Interior INDIAN PROBATE HEARINGS PROCEDURES Purchase at Probate § 30.175 When does a purchased interest vest in the...

43 CFR 30.175 - When does a purchased interest vest in the purchaser?

Code of Federal Regulations, 2013 CFR

2013-10-01

... 43 Public Lands: Interior 1 2013-10-01 2013-10-01 false When does a purchased interest vest in the purchaser? 30.175 Section 30.175 Public Lands: Interior Office of the Secretary of the Interior INDIAN PROBATE HEARINGS PROCEDURES Purchase at Probate § 30.175 When does a purchased interest vest in the...

43 CFR 30.175 - When does a purchased interest vest in the purchaser?

Code of Federal Regulations, 2012 CFR

2012-10-01

... 43 Public Lands: Interior 1 2012-10-01 2011-10-01 true When does a purchased interest vest in the purchaser? 30.175 Section 30.175 Public Lands: Interior Office of the Secretary of the Interior INDIAN PROBATE HEARINGS PROCEDURES Purchase at Probate § 30.175 When does a purchased interest vest in the...

The lysosomal potassium channel TMEM175 adopts a novel tetrameric architecture

DOE Office of Scientific and Technical Information (OSTI.GOV)

Lee, Changkeun; Guo, Jiangtao; Zeng, Weizhong

TMEM175 is a lysosomal K+ channel that is important for maintaining the membrane potential and pH stability in lysosomes1. It contains two homologous copies of a six-transmembrane-helix (6-TM) domain, which has no sequence homology to the canonical tetrameric K+ channels and lacks the TVGYG selectivity filter motif found in these channels2, 3, 4. The prokaryotic TMEM175 channel, which is present in a subset of bacteria and archaea, contains only a single 6-TM domain and functions as a tetramer. Here, we present the crystal structure of a prokaryotic TMEM175 channel from Chamaesiphon minutus, CmTMEM175, the architecture of which represents a completelymore » different fold from that of canonical K+ channels. All six transmembrane helices of CmTMEM175 are tightly packed within each subunit without undergoing domain swapping. The highly conserved TM1 helix acts as the pore-lining inner helix, creating an hourglass-shaped ion permeation pathway in the channel tetramer. Three layers of hydrophobic residues on the carboxy-terminal half of the TM1 helices form a bottleneck along the ion conduction pathway and serve as the selectivity filter of the channel. Mutagenesis analysis suggests that the first layer of the highly conserved isoleucine residues in the filter is primarily responsible for channel selectivity. Thus, the structure of CmTMEM175 represents a novel architecture of a tetrameric cation channel whose ion selectivity mechanism appears to be distinct from that of the classical K+ channel family.« less

21 CFR 175.365 - Vinylidene chloride copolymer coatings for polycarbonate film.

Code of Federal Regulations, 2010 CFR

2010-04-01

... polycarbonate film. 175.365 Section 175.365 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH... chloride copolymer coatings for polycarbonate film. Vinylidene chloride copolymer coatings identified in this section and applied on polycarbonate film may be safely used as food-contact surfaces, in...

49 CFR 175.20 - Compliance and training.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Information and Regulations § 175.20 Compliance and training. An air carrier may not transport a hazardous... required by subpart H of part 172 of this subchapter. In addition, air carriers must comply with all...

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

Code of Federal Regulations, 2011 CFR

2011-04-01

... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of âthe business of farming.â 1.175-3... (continued) § 1.175-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business of...

20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of events...

20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of events...

20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of events...

20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of events...

20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of events...

25 CFR 175.5 - Operations manual.

Code of Federal Regulations, 2010 CFR

2010-04-01

... Provisions § 175.5 Operations manual. (a) The Area Director shall establish an operations manual for the... Director shall amend the operations manual as needed. (b) The public shall be notified by the Area Director... shall be published in local newspaper(s) of general circulation, posted at the utility office(s), and...

Development of ytterbium-doped oxyfluoride glasses for laser cooling applications.

PubMed

Krishnaiah, Kummara Venkata; de Lima Filho, Elton Soares; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

2016-02-26

Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb(3+)) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb(3+) concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb(3+): glass and decreases with increasing Yb(3+) concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm(3+) and Er(3+) ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb(3+): (2)F5/2 → (2)F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb(3+) with increasing Yb(3+) concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed.

41g-120-175

NASA Image and Video Library

2009-06-25

41G-120-175 (5-13 Oct. 1984) --- Egypt and the Nile River Delta are easily recognizable in this 250mm frame photographed by one of the seven 41-G crew members aboard the Earth-orbiting space shuttle Challenger. Cairo and the Egyptian pyramids are also visible in the lower left side of this photograph. The 41-G crew consisted of astronauts Robert L. Crippen, commander, Jon A. McBride, pilot; Mission Specialists Kathryn D. Sullivan, Sally K. Ride, and David D. Leestma; along with Canadian astronaut Marc Garneau; and Paul D. Scully-Power, both payload specialists. Photo credit: NASA

Synthesis and photocatalytic activity of ytterbium-doped titania/diatomite composite photocatalysts

NASA Astrophysics Data System (ADS)

Tang, Wenjian; Qiu, Kehui; Zhang, Peicong; Yuan, Xiqiang

2016-01-01

Ytterbium-doped titanium dioxide (Yb-TiO2)/diatomite composite materials with different Yb concentrations were prepared by sol-gel method. The phase structure, morphology, and chemical composition of the as-prepared composites were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and ultraviolet-visible (UV-vis) diffuse reflection spectroscopy. The XRD and Raman spectroscopy analysis indicated that the TiO2 existed in the form of pure anatase in the composites. The SEM images exhibited the well deposition and dispersion of TiO2 nanoparticles with little agglomeration on the surfaces of diatoms. The UV-vis diffuse reflection spectra showed that the band gap of TiO2 could be narrowed by the introduction of Yb species, which was further affected by doping concentration of Yb. The photocatalytic activity of synthesized samples was investigated by the degradation of methylene blue (MB) under UV light irradiation. It was observed that the photocatalytic degradation followed a pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Compared to TiO2 and TiO2/diatomite, the Yb-TiO2/diatomite composites exhibited higher photocatalytic activity toward degradation of MB using UV light irradiation.

Two-dimensional ytterbium oxide nanodisks based biosensor for selective detection of urea.

PubMed

Ibrahim, Ahmed A; Ahmad, Rafiq; Umar, Ahmad; Al-Assiri, M S; Al-Salami, A E; Kumar, Rajesh; Ansari, S G; Baskoutas, S

2017-12-15

Herein, we demonstrate synthesis and application of two-dimensional (2D) rectangular ytterbium oxide (Yb 2 O 3 ) nanodisks via a facile hydrothermal method. The structural, morphological, compositional, crystallinity, and phase properties of as-synthesized nanodisks were carried out using several analytical techniques that showed well defined 2D rectangular nanodisks/sheet like morphologies. The average thickness and edge length of the nanosheet structures were 20 ± 5nm and 600 ± 50nm, respectively. To develop urea biosensor, glassy carbon electrodes (GCE) were modified with Yb 2 O 3 nanodisks, followed by urease immobilization and Nafion membrane covering (GCE/Yb 2 O 3 /Urease/Nafion). The fabricated biosensor showed sensitivity of 124.84μAmM -1 cm -2 , wide linear range of 0.05-19mM, detection limit down to ~ 2μM, and fast response time of ~ 3s. The developed biosensor was also used for the urea detection in water samples through spike-recovery experiments, which illustrates satisfactory recoveries. In addition, the obtained desirable selectivity towards specific interfering species, long-term stability, reproducibility, and repeatability further confirm the potency of as-fabricated urea biosensor. Copyright © 2017 Elsevier B.V. All rights reserved.

Evolution of Fseg/Cseg dimorphism in region III of the Plasmodium falciparum eba-175 gene.

PubMed

Yasukochi, Yoshiki; Naka, Izumi; Patarapotikul, Jintana; Hananantachai, Hathairad; Ohashi, Jun

2017-04-01

The 175-kDa erythrocyte binding antigen (EBA-175) of the malaria parasite Plasmodium falciparum is important for its invasion into human erythrocytes. The primary structure of eba-175 is divided into seven regions, namely I to VII. Region III contains highly divergent dimorphic segments, termed Fseg and Cseg. The allele frequencies of segmental dimorphism within a P. falciparum population have been extensively examined; however, the molecular evolution of segmental dimorphism is not well understood. A comprehensive comparison of nucleotide sequences among 32 P. falciparum eba-175 alleles identified in our previous study, two Plasmodium reichenowi, and one P. gaboni orthologous alleles obtained from the GenBank database was conducted to uncover the origin and evolutionary processes of segmental dimorphism in P. falciparum eba-175. In the eba-175 nucleotide sequence derived from a P. reichenowi CDC strain, both Fseg and Cseg were found in region III, which implies that the original eba-175 gene had both segments, and deletions of F- and C-segments generated Cseg and Fseg alleles, respectively. We also confirmed the presence of allele with Fseg and Cseg in another P. reichenowi strain (SY57), by re-mapping short reads obtained from the GenBank database. On the other hand, the segmental sequence of eba-175 ortholog in P. gaboni was quite diverged from those of the other species, suggesting that the original eba-175 dimorphism of P. falciparum can be traced back to the stem linage of P. falciparum and P. reichenowi. Our findings suggest that Fseg and Cseg alleles are derived from a single eba-175 allele containing both segments in the ancestral population of P. falciparum and P. reichenowi, and that the allelic dimorphism of eba-175 was shaped by the independent emergence of similar dimorphic lineage in different species that has never been observed in any evolutionary mode of allelic dimorphism at other loci in malaria genomes. Copyright © 2017 Elsevier B.V. All

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

Code of Federal Regulations, 2012 CFR

2012-10-01

...-command. 175.33 Section 175.33 Transportation Other Regulations Relating to Transportation PIPELINE AND...-in-command. (a) When a hazardous material subject to the provisions of this subchapter is carried in...-in-command with accurate and legible written information as early as practicable before departure of...

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

Code of Federal Regulations, 2014 CFR

2014-10-01

...-command. 175.33 Section 175.33 Transportation Other Regulations Relating to Transportation PIPELINE AND...-in-command. (a) When a hazardous material subject to the provisions of this subchapter is carried in...-in-command with accurate and legible written information as early as practicable before departure of...

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

Code of Federal Regulations, 2011 CFR

2011-10-01

...-command. 175.33 Section 175.33 Transportation Other Regulations Relating to Transportation PIPELINE AND...-in-command. (a) When a hazardous material subject to the provisions of this subchapter is carried in...-in-command with accurate and legible written information as early as practicable before departure of...

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

Code of Federal Regulations, 2013 CFR

2013-10-01

...-command. 175.33 Section 175.33 Transportation Other Regulations Relating to Transportation PIPELINE AND...-in-command. (a) When a hazardous material subject to the provisions of this subchapter is carried in...-in-command with accurate and legible written information as early as practicable before departure of...

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

Code of Federal Regulations, 2010 CFR

2010-10-01

...-command. 175.33 Section 175.33 Transportation Other Regulations Relating to Transportation PIPELINE AND...-in-command. (a) When a hazardous material subject to the provisions of this subchapter is carried in...-in-command with accurate and legible written information as early as practicable before departure of...

49 CFR 17.5 - What is the Secretary's obligation with respect to Federal interagency coordination?

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 1 2010-10-01 2010-10-01 false What is the Secretary's obligation with respect to Federal interagency coordination? 17.5 Section 17.5 Transportation Office of the Secretary of Transportation INTERGOVERNMENTAL REVIEW OF DEPARTMENT OF TRANSPORTATION PROGRAMS AND ACTIVITIES § 17.5 What is...

Development of ytterbium-doped oxyfluoride glasses for laser cooling applications

PubMed Central

Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

2016-01-01

Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb3+) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb3+ concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb3+: glass and decreases with increasing Yb3+ concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm3+ and Er3+ ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb3+: 2F5/2 → 2F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb3+ with increasing Yb3+ concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed. PMID:26915817

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

Code of Federal Regulations, 2010 CFR

2010-10-01

... (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when... operator must ensure that the ground staff is informed that the dry ice is being loaded or is on board the...

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

Code of Federal Regulations, 2013 CFR

2013-10-01

... (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when... operator must ensure that the ground staff is informed that the dry ice is being loaded or is on board the...

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

Code of Federal Regulations, 2012 CFR

2012-10-01

... (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when... operator must ensure that the ground staff is informed that the dry ice is being loaded or is on board the...

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

Code of Federal Regulations, 2011 CFR

2011-10-01

... (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when... operator must ensure that the ground staff is informed that the dry ice is being loaded or is on board the...

49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

Code of Federal Regulations, 2014 CFR

2014-10-01

... (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice) when... operator must ensure that the ground staff is informed that the dry ice is being loaded or is on board the...

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

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Soil and water conservation expenditures; in... (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for depreciation...

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

Code of Federal Regulations, 2014 CFR

2014-04-01

... 26 Internal Revenue 3 2014-04-01 2014-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for...

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

Code of Federal Regulations, 2013 CFR

2013-04-01

... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for...

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

Code of Federal Regulations, 2012 CFR

2012-04-01

... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for...

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

Code of Federal Regulations, 2011 CFR

2011-04-01

... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for...

19 CFR 175.25 - Procedure at port of entry designated by petitioner.

Code of Federal Regulations, 2010 CFR

2010-04-01

... decision of the Commissioner of Customs, he shall refer the matter to the Commissioner of Customs for his... 19 Customs Duties 2 2010-04-01 2010-04-01 false Procedure at port of entry designated by petitioner. 175.25 Section 175.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND...

19 CFR 175.25 - Procedure at port of entry designated by petitioner.

Code of Federal Regulations, 2013 CFR

2013-04-01

... decision of the Commissioner of Customs, he shall refer the matter to the Commissioner of Customs for his... 19 Customs Duties 2 2013-04-01 2013-04-01 false Procedure at port of entry designated by petitioner. 175.25 Section 175.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND...

19 CFR 175.25 - Procedure at port of entry designated by petitioner.

Code of Federal Regulations, 2012 CFR

2012-04-01

... decision of the Commissioner of Customs, he shall refer the matter to the Commissioner of Customs for his... 19 Customs Duties 2 2012-04-01 2012-04-01 false Procedure at port of entry designated by petitioner. 175.25 Section 175.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND...

19 CFR 175.25 - Procedure at port of entry designated by petitioner.

Code of Federal Regulations, 2014 CFR

2014-04-01

... decision of the Commissioner of Customs, he shall refer the matter to the Commissioner of Customs for his... 19 Customs Duties 2 2014-04-01 2014-04-01 false Procedure at port of entry designated by petitioner. 175.25 Section 175.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND...

19 CFR 175.25 - Procedure at port of entry designated by petitioner.

Code of Federal Regulations, 2011 CFR

2011-04-01

... decision of the Commissioner of Customs, he shall refer the matter to the Commissioner of Customs for his... 19 Customs Duties 2 2011-04-01 2011-04-01 false Procedure at port of entry designated by petitioner. 175.25 Section 175.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND...

Study Shows India Can Integrate 175 GW of Renewable Energy into Its

Science.gov Websites

Electricity Grid | News | News | NREL Study Shows India Can Integrate 175 GW of Renewable Energy into Its Electricity Grid News Release: Study Shows India Can Integrate 175 GW of Renewable Energy Corporation, Ltd. (POSOCO); and Lawrence Berkeley National Laboratory (LBNL) produced the study Greening the

Genetic evidence for contribution of human dispersal to the genetic diversity of EBA-175 in Plasmodium falciparum.

PubMed

Yasukochi, Yoshiki; Naka, Izumi; Patarapotikul, Jintana; Hananantachai, Hathairad; Ohashi, Jun

2015-08-01

The 175-kDa erythrocyte binding antigen (EBA-175) of Plasmodium falciparum plays a crucial role in merozoite invasion into human erythrocytes. EBA-175 is believed to have been under diversifying selection; however, there have been no studies investigating the effect of dispersal of humans out of Africa on the genetic variation of EBA-175 in P. falciparum. The PCR-direct sequencing was performed for a part of the eba-175 gene (regions II and III) using DNA samples obtained from Thai patients infected with P. falciparum. The divergence times for the P. falciparum eba-175 alleles were estimated assuming that P. falciparum/Plasmodium reichenowi divergence occurred 6 million years ago (MYA). To examine the possibility of diversifying selection, nonsynonymous and synonymous substitution rates for Plasmodium species were also estimated. A total of 32 eba-175 alleles were identified from 131 Thai P. falciparum isolates. Their estimated divergence time was 0.13-0.14 MYA, before the exodus of humans from Africa. A phylogenetic tree for a large sequence dataset of P. falciparum eba-175 alleles from across the world showed the presence of a basal Asian-specific cluster for all P. falciparum sequences. A markedly more nonsynonymous substitutions than synonymous substitutions in region II in P. falciparum was also detected, but not within Plasmodium species parasitizing African apes, suggesting that diversifying selection has acted specifically on P. falciparum eba-175. Plasmodium falciparum eba-175 genetic diversity appeared to increase following the exodus of Asian ancestors from Africa. Diversifying selection may have played an important role in the diversification of eba-175 allelic lineages. The present results suggest that the dispersals of humans out of Africa influenced significantly the molecular evolution of P. falciparum EBA-175.

A physical model of the photo- and radiation-induced degradation of ytterbium-doped silica optical fibres

DOE Office of Scientific and Technical Information (OSTI.GOV)

Mady, Franck, E-mail: franck.mady@unice.fr; Duchez, Jean-Bernard, E-mail: franck.mady@unice.fr; Mebrouk, Yasmine, E-mail: franck.mady@unice.fr

2014-10-21

We propose a model to describe the photo- or/and the radiation-induced darkening of ytterbium-doped silica optical fibers. This model accounts for the well-established experimental features of photo-darkening. Degradation behaviors predicted for fibers pumped in harsh environments are also fully confirmed by experimental data reported in the work by Duchez et al. (this proceeding), which gives a detailed characterization of the interplay between the effects of the pump and those of a superimposed ionizing irradiation (actual operation conditions in space-based applications for instance). In particular, dependences of the darkening build-up on the pump power, the total ionizing dose and the dosemore » rate are all correctly reproduced. The presented model is a ‘sufficient’ one, including the minimal physical ingredients required to reproduce experimental features. Refinements could be proposed to improve, e.g., quantitative kinetics.« less

MicroRNA-17-5p contributes to osteoarthritis progression by binding p62/SQSTM1.

PubMed

Li, Huihui; Miao, Daoyi; Zhu, Qi; Huang, Jianghua; Lu, Guangxian; Xu, Weiguo

2018-02-01

Autophagy has been reported to be widely involved in the pathogenesis of osteoarthritis (OA). Increasing evidence suggested the important role of microRNAs (miRs) in the progression of OA. However, the functional role of miR-17-5p in OA development has remained to be fully elucidated. First, a mouse model of OA was established and the relative level of miR-17-5p was determined using PCR. Safranin O-fast green staining was applied to determine cartilage degeneration. TargetScan software and a dual luciferase reporter assay were applied to determine potential target genes of miR-17-5P. Autophagy measurement was performed using green fluorescent protein-microtubule-associated protein 1 light chain 3 (LC3) dot analysis. The results demonstrated that the relative expression of miR-17-5p was significantly decreased in OA model mice. In addition, the level of miR-17-5p was decreased in SW1353 human chondrosarcoma cells treated with interleukin-1β. Furthermore, autophagy was found to be suppressed in the knee joints of experimental OA model mice. The dual luciferase reporter assay confirmed that p62/sequestosome 1 was a target gene of miR-17-5p. Of note, miR-17-5p inhibitor-induced reduction of LC3 dots was markedly reversed by knockdown of p62 in SW1353 cells. In conclusion, decreased miR-17-5p expression in chondrocytes induced autophagy mainly through suppressing the expression of p62, thereby contributing to OA progression.

CsPbBr3 nanocrystal saturable absorber for mode-locking ytterbium fiber laser

NASA Astrophysics Data System (ADS)

Zhou, Yan; Hu, Zhiping; Li, Yue; Xu, Jianqiu; Tang, Xiaosheng; Tang, Yulong

2016-06-01

Cesium lead halide perovskite nanocrystals (CsPbX3, X = Cl, Br, I) have been reported as efficient light-harvesting and light-emitting semiconductor materials, but their nonlinear optical properties have been seldom touched upon. In this paper, we prepare layered CsPbBr3 nanocrystal films and characterize their physical properties. Broadband linear absorption from ˜0.8 to over 2.2 μm and nonlinear optical absorption at the 1-μm wavelength region are measured. The CsPbBr3 saturable absorber (SA), manufactured by drop-casting of colloidal CsPbBr3 liquid solution on a gold mirror, shows modulation depth and saturation intensity of 13.1% and 10.7 MW/cm2, respectively. With this SA, mode-locking operation of a polarization-maintained ytterbium fiber laser produces single pulses with duration of ˜216 ps, maximum average output power of 10.5 mW, and the laser spectrum is centered at ˜1076 nm. This work shows that CsPbBr3 films can be efficient SA candidates for fiber lasers and also have great potential to become broadband linear and nonlinear optical materials for photonics and optoelectronics.

Noise-like pulse generation in an ytterbium-doped fiber laser using tungsten disulphide

NASA Astrophysics Data System (ADS)

Zhang, Wenping; Song, Yanrong; Guoyu, Heyang; Xu, Runqin; Dong, Zikai; Li, Kexuan; Tian, Jinrong; Gong, Shuang

2017-12-01

We demonstrated the noise-like pulse (NLP) generation in an ytterbium-doped fiber (YDF) laser with tungsten disulphide (WS2). Stable fundamental mode locking and second-order harmonic mode locking were observed. The saturable absorber (SA) was a WS2-polyvinyl alcohol film. The modulation depth of the WS2 film was 2.4%, and the saturable optical intensity was 155 MW cm-2. Based on this SA, the fundamental NLP with a pulse width of 20 ns and repetition rate of 7 MHz were observed. The autocorrelation trace of output pulses had a coherent spike, which came from NLP. The average pulse width of the spike was 550 fs on the top of a broad pedestal. The second-order harmonic NLP had a spectral bandwidth of 1.3 nm and pulse width of 10 ns. With the pump power of 400 mW, the maximum output power was 22.2 mW. To the best of our knowledge, this is the first time a noise-like mode locking in an YDF laser based on WS2-SA in an all normal dispersion regime was obtained.

7 CFR 400.175 - Revocation and non-acceptance.

Code of Federal Regulations, 2011 CFR

2011-01-01

... Agriculture Regulations of the Department of Agriculture (Continued) FEDERAL CROP INSURANCE CORPORATION, DEPARTMENT OF AGRICULTURE GENERAL ADMINISTRATIVE REGULATIONS Reinsurance Agreement-Standards for Approval; Regulations for the 1997 and Subsequent Reinsurance Years § 400.175 Revocation and non-acceptance. (a) FCIC...

Structural evidence for the role of polar core residue Arg175 in arrestin activation

PubMed Central

Granzin, Joachim; Stadler, Andreas; Cousin, Anneliese; Schlesinger, Ramona; Batra-Safferling, Renu

2015-01-01

Binding mechanism of arrestin requires photoactivation and phosphorylation of the receptor protein rhodopsin, where the receptor bound phosphate groups cause displacement of the long C-tail ‘activating’ arrestin. Mutation of arginine 175 to glutamic acid (R175E), a central residue in the polar core and previously predicted as the ‘phosphosensor’ leads to a pre-active arrestin that is able to terminate phototransduction by binding to non-phosphorylated, light-activated rhodopsin. Here, we report the first crystal structure of a R175E mutant arrestin at 2.7 Å resolution that reveals significant differences compared to the basal state reported in full-length arrestin structures. These differences comprise disruption of hydrogen bond network in the polar core, and three-element interaction including disordering of several residues in the receptor-binding finger loop and the C-terminus (residues 361–404). Additionally, R175E structure shows a 7.5° rotation of the amino and carboxy-terminal domains relative to each other. Consistent to the biochemical data, our structure suggests an important role of R29 in the initial activation step of C-tail release. Comparison of the crystal structures of basal arrestin and R175E mutant provide insights into the mechanism of arrestin activation, where binding of the receptor likely induces structural changes mimicked as in R175E. PMID:26510463

Structural evidence for the role of polar core residue Arg175 in arrestin activation.

PubMed

Granzin, Joachim; Stadler, Andreas; Cousin, Anneliese; Schlesinger, Ramona; Batra-Safferling, Renu

2015-10-29

Binding mechanism of arrestin requires photoactivation and phosphorylation of the receptor protein rhodopsin, where the receptor bound phosphate groups cause displacement of the long C-tail 'activating' arrestin. Mutation of arginine 175 to glutamic acid (R175E), a central residue in the polar core and previously predicted as the 'phosphosensor' leads to a pre-active arrestin that is able to terminate phototransduction by binding to non-phosphorylated, light-activated rhodopsin. Here, we report the first crystal structure of a R175E mutant arrestin at 2.7 Å resolution that reveals significant differences compared to the basal state reported in full-length arrestin structures. These differences comprise disruption of hydrogen bond network in the polar core, and three-element interaction including disordering of several residues in the receptor-binding finger loop and the C-terminus (residues 361-404). Additionally, R175E structure shows a 7.5° rotation of the amino and carboxy-terminal domains relative to each other. Consistent to the biochemical data, our structure suggests an important role of R29 in the initial activation step of C-tail release. Comparison of the crystal structures of basal arrestin and R175E mutant provide insights into the mechanism of arrestin activation, where binding of the receptor likely induces structural changes mimicked as in R175E.

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

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and navigation. 207.175a Section 207.175a... REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration...

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

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration, and navigation. 207.175a Section 207.175a... REGULATIONS § 207.175a Carlson's Landing Dam navigation lock, Withlacoochee River, Fla.; use, administration...

Seizure outcome in 175 patients with juvenile myoclonic epilepsy--a long-term observational study.

PubMed

Höfler, Julia; Unterberger, Iris; Dobesberger, Judith; Kuchukhidze, Giorgi; Walser, Gerald; Trinka, Eugen

2014-12-01

Juvenile myoclonic epilepsy (JME) is a genetic generalized epilepsy syndrome. Under appropriate antiepileptic drugs (AED) up to 85% of patients become seizure-free, but many may have a relapse after AED withdrawal. We retrospectively studied 242 patients with JME at the Department of Neurology, Medical University Innsbruck, Austria (1975-2006). We analyzed age at seizure onset, age at last follow up, seizure types, photosensitivity, seizure outcome and neuroimaging findings; inclusion criterion was a medical treatment period of >2 years; exclusion criteria were traumatic or infectious brain injury before the onset of JME and/or gross structural pathology on neuroimaging. We identified 175 patients (111 women) with a median age at seizure onset of 15 years, (range 3-46) and a median age at follow-up (FU) of 38 years (range 14-87; median FU 8 years, range 2-38). Fourteen percent showed (24/175) photosensitivity on routine EEG. Seizure outcome: 62% (109/175) were seizure-free of myoclonic seizures (MS), generalized tonic clonic seizures (GTCS) and absence seizures (AS) for >1 year, and 53% (94/175) for >2 years, including 16 patients (9%) without AEDs. Thirty-one percent (54/175) were seizure-free between 2 and 5 years, 15% (26/175) between 6 and 10, and 8% (14/175) >10 years; 38% (66/175) were not seizure-free. Not seizure-free patients had more often MS, AS and GTCS within the first year of epilepsy than those who were seizure-free at last FU (11% vs. 3%, Chi(2)=4.679, df=1, p=0.043). Seizure-free patients had more often MS and GTCS as last seizure types in the year before becoming seizure-free (37% vs. 15%, p=0.003), whereas in not seizure-free group MS only and GTCS only persisted. JME does not always need lifelong treatment, as a substantial minority of patients remain seizure-free without AEDs. AS, MS and GTCS at onset of the disease are indicators of poor long-term seizure control. Copyright © 2014 The Authors. Published by Elsevier B.V. All rights reserved.

27 CFR 25.175 - Prepayment of tax.

Code of Federal Regulations, 2010 CFR

2010-04-01

... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal for...

27 CFR 25.175 - Prepayment of tax.

Code of Federal Regulations, 2013 CFR

2013-04-01

... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal for...

27 CFR 25.175 - Prepayment of tax.

Code of Federal Regulations, 2014 CFR

2014-04-01

... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal for...

27 CFR 25.175 - Prepayment of tax.

Code of Federal Regulations, 2012 CFR

2012-04-01

... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal for...

27 CFR 25.175 - Prepayment of tax.

Code of Federal Regulations, 2011 CFR

2011-04-01

... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal for...

30 CFR 206.175 - How do I determine quantities and qualities of production for computing royalties?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false How do I determine quantities and qualities of production for computing royalties? 206.175 Section 206.175 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR MINERALS REVENUE MANAGEMENT PRODUCT VALUATION Indian Gas § 206.175 How do I...

Slope efficiency over 30% single-frequency ytterbium-doped fiber laser based on Sagnac loop mirror filter.

PubMed

Yin, Mojuan; Huang, Shenghong; Lu, Baole; Chen, Haowei; Ren, Zhaoyu; Bai, Jintao

2013-09-20

A high-slope-efficiency single-frequency (SF) ytterbium-doped fiber laser, based on a Sagnac loop mirror filter (LMF), was demonstrated. It combined a simple linear cavity with a Sagnac LMF that acted as a narrow-bandwidth filter to select the longitudinal modes. And we introduced a polarization controller to restrain the spatial hole burning effect in the linear cavity. The system could operate at a stable SF oscillating at 1064 nm with the obtained maximum output power of 32 mW. The slope efficiency was found to be primarily dependent on the reflectivity of the fiber Bragg grating. The slope efficiency of multi-longitudinal modes was higher than 45%, and the highest slope efficiency of the single longitudinal mode we achieved was 33.8%. The power stability and spectrum stability were <2% and <0.1%, respectively, and the signal-to-noise ratio measured was around 60 dB.

Effects of adding metals to MoS2 in a ytterbium doped Q-switched fiber laser

NASA Astrophysics Data System (ADS)

Khaleque, Abdul; Liu, Liming

2018-03-01

Molybdenum disulfide (MoS2) is widely used in lubricants, metallic alloys and in electronic and optical components. It is also used as saturable absorbers (SAs) in lasers (e.g. fiber lasers): a simple deposition of MoS2 on the fiber end can create a saturable absorber without the necessity of extensive alignment of the optical beam. In this article, we study the effects of adding different metals (Cr, Au, and Al) to MoS2 in a ytterbium (Yb)-doped Q-switched fiber laser. Experimental results show that the addition of a thin layer of gold and aluminium can reduce pulse durations to about 5.8 μs and 8.5 μs, respectively, compared with pure MoS2 with pulse duration of 12 μs. Experimental analysis of the combined metal and MoS2 based composite SAs can be useful in fiber laser applications where it may also find applications in medical, three dimensional (3D) active imaging and dental applications.

Erbium/ytterbium co-doped double clad fiber amplifier, its applications and effects in fiber optic communication systems

NASA Astrophysics Data System (ADS)

Dua, Puneit

Increased demand for larger bandwidth and longer inter-amplifiers distances translates to higher power budgets for fiber optic communication systems in order to overcome large splitting losses and achieve acceptable signal-to-noise ratios. Due to their unique design ytterbium sensitized erbium doped, double clad fiber amplifiers; offer significant increase in the output powers that can be obtained. In this thesis we investigate, a one-stage, high power erbium and ytterbium co-doped double clad fiber amplifier (DCFA) with output power of 1.4W, designed and built in our lab. Experimental demonstration and numerical simulation techniques have been used to systematically study the applications of such an amplifier and the effects of incorporating it in various fiber optic communication systems. Amplitude modulated subcarrier multiplexed (AM-SCM) CATV distribution experiment has been performed to verify the feasibility of using this amplifier in an analog/digital communication system. The applications of the amplifier as a Fabry-Perot and ring fiber laser with an all-fiber cavity, a broadband supercontinuum source and for generation of high power, short pulses at 5GHz have been experimentally demonstrated. A variety of observable nonlinear effects occur due to the high intensity of the optical powers confined in micron-sized cores of the fibers, this thesis explores in detail some of these effects caused by using the high power Er/Yb double clad fiber amplifier. A fiber optic based analog/digital CATV system experiences composite second order (CSO) distortion due to the interaction between the gain tilt---the variation of gain with wavelength, of the doped fiber amplifier and the wavelength chirp of the directly modulated semiconductor laser. Gain tilt of the Er/Yb co-doped fiber amplifier has been experimentally measured and its contribution to the CSO of the system calculated. Theoretical analysis of a wavelength division multiplexed system with closely spaced

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

Code of Federal Regulations, 2010 CFR

2010-04-01

... of substances Limitations Ethylene glycol As a solvent removed by water washing. Iron oxide Lithium...) shall yield total extractives not to exceed those prescribed in § 175.300(c)(3); lithium extractives not...

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

Code of Federal Regulations, 2013 CFR

2013-04-01

... of substances Limitations Ethylene glycol As a solvent removed by water washing. Iron oxide Lithium...) shall yield total extractives not to exceed those prescribed in § 175.300(c)(3); lithium extractives not...

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

Code of Federal Regulations, 2012 CFR

2012-04-01

... of substances Limitations Ethylene glycol As a solvent removed by water washing. Iron oxide Lithium...) shall yield total extractives not to exceed those prescribed in § 175.300(c)(3); lithium extractives not...

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

Code of Federal Regulations, 2011 CFR

2011-04-01

... of substances Limitations Ethylene glycol As a solvent removed by water washing. Iron oxide Lithium...) shall yield total extractives not to exceed those prescribed in § 175.300(c)(3); lithium extractives not...

Inhibition of Dexamethasone-induced Fatty Liver Development by Reducing miR-17-5p Levels

PubMed Central

Du, William W; Liu, Fengqiong; Shan, Sze Wan; Ma, Xindi Cindy; Gupta, Shaan; Jin, Tianru; Spaner, David; Krylov, Sergey N; Zhang, Yaou; Ling, Wenhua; Yang, Burton B

2015-01-01

Steatosis is a pivotal event in the initiation and progression of nonalcoholic fatty liver disease (NAFLD) which can be driven by peroxisome proliferator-activated receptor-α (PPAR-α) dysregulation. Through examining the effect of PPAR-α on fatty liver development, we found that PPAR-α is a target of miR-17-5p. Transgenic mice expressing miR-17 developed fatty liver and produced higher levels of triglyceride and cholesterol but lower levels of PPAR-α. Ectopic expression of miR-17 enhanced cellular steatosis. Gain-of-function and loss-of-function experiments confirmed PPAR-α as a target of miR-17-5p. On the other hand, PPAR-α bound to the promoter of miR-17 and promoted its expression. The feed-back loop between miR-17-5p and PPAR-α played a key role in the induction of steatosis and fatty liver development. Mice with high levels of miR-17-5p were sensitive to Dexamethasone-induced fatty liver formation. Inhibition of miR-17-5p suppressed this process and enhanced PPAR-α expression in mice treated with Dexamethasone. Clofibrate, Ciprofibrate, and WY-14643: three agents used for treatment of metabolic disorders, were found to promote PPAR-α expression while decreasing miR-17-5p levels and inhibiting steatosis. Our studies show that miR-17-5p inhibitor and agents used in metabolic disorders may be applied in combination with Dexamethasone in the treatment of anti-inflammation, immunosuppression, and cancer patients. PMID:25896250

24 CFR 1720.175 - Intervention by interested persons.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 24 Housing and Urban Development 5 2011-04-01 2011-04-01 false Intervention by interested persons... PRACTICE Adjudicatory Proceedings General Provisions § 1720.175 Intervention by interested persons. (a) The... public interest, may permit any person to participate by intervention in the proceeding. The petition...

24 CFR 1720.175 - Intervention by interested persons.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 24 Housing and Urban Development 5 2014-04-01 2014-04-01 false Intervention by interested persons... PRACTICE Adjudicatory Proceedings General Provisions § 1720.175 Intervention by interested persons. (a) The... public interest, may permit any person to participate by intervention in the proceeding. The petition...

24 CFR 1720.175 - Intervention by interested persons.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Intervention by interested persons... PRACTICE Adjudicatory Proceedings General Provisions § 1720.175 Intervention by interested persons. (a) The... public interest, may permit any person to participate by intervention in the proceeding. The petition...

24 CFR 1720.175 - Intervention by interested persons.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 24 Housing and Urban Development 5 2013-04-01 2013-04-01 false Intervention by interested persons... PRACTICE Adjudicatory Proceedings General Provisions § 1720.175 Intervention by interested persons. (a) The... public interest, may permit any person to participate by intervention in the proceeding. The petition...

24 CFR 1720.175 - Intervention by interested persons.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 24 Housing and Urban Development 5 2012-04-01 2012-04-01 false Intervention by interested persons... PRACTICE Adjudicatory Proceedings General Provisions § 1720.175 Intervention by interested persons. (a) The... public interest, may permit any person to participate by intervention in the proceeding. The petition...

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

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

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

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

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

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

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

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

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

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6...

40 CFR 7.175 - Exhaustion of administrative remedy.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 40 Protection of Environment 1 2011-07-01 2011-07-01 false Exhaustion of administrative remedy. 7... Discrimination Prohibited on the Basis of Age § 7.175 Exhaustion of administrative remedy. (a) A complainant may file a civil action following the exhaustion of administrative remedies under the Age Discrimination...

40 CFR 7.175 - Exhaustion of administrative remedy.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Exhaustion of administrative remedy. 7... Discrimination Prohibited on the Basis of Age § 7.175 Exhaustion of administrative remedy. (a) A complainant may file a civil action following the exhaustion of administrative remedies under the Age Discrimination...

40 CFR 68.175 - Prevention program/Program 3.

Code of Federal Regulations, 2010 CFR

2010-07-01

... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... the most recent change that triggered management of change procedures and the date of the most recent review or revision of management of change procedures. (j) The date of the most recent pre-startup review...

Bose and Fermi Gases of Ultracold Ytterbium in a Triangular Optical Lattice

NASA Astrophysics Data System (ADS)

Thobe, Alexander; Doerscher, Soeren; Hundt, Bastian; Kochanke, Andre; Becker, Christoph; Sengstock, Klaus

2013-05-01

Quantum gases of alkaline-earth like atoms such as Calcium, Strontium and Ytterbium (Yb) open up exciting new possibilities for the study of many body physics in optical lattices, ranging from SU(N) symmetric spin Hamiltonians to the Kondo Lattice Model. Here, we present experimental studies of ultracold bosonic and fermionic Yb quantum gases. Unlike other experiments studying ultracold alkaline earth-like atoms, we have implemented a 2D-MOT instead of a Zeeman slower as a source of cold atoms. From the 2D-MOT, operating on the broad 1S0 -->1P1 transtition, the atoms are directly loaded into the 3D-MOT operating on a narrow intercombination line. The atoms are then evaporatively cooled to quantum degeneracy in a crossed optical dipole trap. With this setup we routinely produce BECs and degenerate Fermi gases of different Yb isotopes. Moreover, we present first results on spectroscopy of an interacting fermi gas on the ultranarrow 1S0 -->3P0 clock transition in a magic wavelength optical lattice. In future experiments, this spectroscopy will serve as a versatile tool for interaction sensing and selective addressing of atoms in a wavelength tunable, state dependent, triangular optical lattice, which we are currently implementing. This work is supported by DFG within SFB 925 and GrK 1355, as well as EU FETOpen (iSense).

21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

Code of Federal Regulations, 2014 CFR

2014-04-01

... removed by water washing. Iron oxide Lithium hydroxide Removed by water washing. Methyl orange As an acid... § 175.300(c)(3); lithium extractives not to exceed 0.025 milligram per square inch of surface; and...

Cell damage evaluation of mammalian cells in cell manipulation by amplified femtosecond ytterbium laser

NASA Astrophysics Data System (ADS)

Hong, Z.-Y.; Iino, T.; Hagihara, H.; Maeno, T.; Okano, K.; Yasukuni, R.; Hosokawa, Y.

2018-03-01

A micrometer-scale explosion with cavitation bubble generation is induced by focusing a femtosecond laser in an aqueous solution. We have proposed to apply the explosion as an impulsive force to manipulate mammalian cells especially in microfluidic chip. Herein, we employed an amplified femtosecond ytterbium laser as an excitation source for the explosion and evaluated cell damage in the manipulation process to clarify the application potential. The damage of C2C12 myoblast cell prepared as a representative mammalian cell was investigated as a function of distance between cell and laser focal point. Although the cell received strong damage on the direct laser irradiation condition, the damage sharply decreased with increasing distance. Since the threshold distance, above which the cell had no damage, was consistent with radius of the cavitation bubble, impact of the cavitation bubble would be a critical factor for the cell damage. The damage had strong nonlinearity in the pulse energy dependence. On the other hand, cell position shift by the impact of the cavitation bubble was almost proportional to the pulse energy. In balance between the cell viability and the cell position shift, we elucidated controllability of the cell manipulation in microfluidic chip.

Flux growth of Yb(6.6)Ir(6)Sn(16) having mixed-valent ytterbium.

PubMed

Peter, Sebastian C; Subbarao, Udumula; Rayaprol, Sudhindra; Martin, Joshua B; Balasubramanian, Mahalingam; Malliakas, Christos D; Kanatzidis, Mercouri G

2014-07-07

The compound Yb6.6Ir6Sn16 was obtained as single crystals in high yield from the reaction of Yb with Ir and Sn run in excess indium. Single-crystal X-ray diffraction analysis shows that Yb6.6Ir6Sn16 crystallizes in the tetragonal space group P42/nmc with a = b = 9.7105(7) Å and c = 13.7183(11) Å. The crystal structure is composed of a [Ir6Sn16] polyanionic network with cages in which the Yb atoms are embedded. The Yb sublattice features extensive vacancies on one crystallographic site. Magnetic susceptibility measurements on single crystals indicate Curie-Weiss law behavior <100 K with no magnetic ordering down to 2 K. The magnetic moment within the linear region (<100 K) is 3.21 μB/Yb, which is ∼70% of the expected value for a free Yb(3+) ion suggesting the presence of mixed-valent ytterbium atoms. X-ray absorption near edge spectroscopy confirms that Yb6.6Ir6Sn16 exhibits mixed valence. Resistivity and heat capacity measurements for Yb6.6Ir6Sn16 indicate non-Fermi liquid metallic behavior.

Development of Trivalent Ytterbium Doped Fluorapatites for Diode-Pumped Laser Applications

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bayramian, Andrew J.

One of the major motivators of this work is the Mercury Project, which is a 1 kW scalable diode-pumped solid-state laser system under development at Lawrence Livermore National Laboratory (LLNL). Major goals include 100 J pulses, 10% wallplug efficiency, 10 Hz repetition rate, and a 5 times diffraction limited beam. To achieve these goals the Mercury laser incorporates ytterbium doped Sr 5(PO 4) 3F (S-FAP) as the amplifier gain medium. The primary focus of this thesis is a full understanding of the properties of this material which are necessary for proper design and modeling of the system. Ytterbium doped fluorapatites,more » which were previously investigated at LLNL, were found to be ideal candidate materials for a high power amplifier systems providing high absorption and emission cross sections, long radiative lifetimes, and high efficiency. A family of barium substituted S-FAP crystals were grown in an effort to modify the pump and emission bandwidths for application to broadband diode pumping and short pulse generation. Crystals of Yb 3+:Sr 5-xBa x(PO 4) 3F where x < 1 showed homogeneous lines offering 8.4 nm (1.8 times enhancement) of absorption bandwidth and 6.9 nm (1.4 times enhancement) of emission bandwidth. The gain saturation fluence of Yb:S-FAP was measured to be 3.2 J/cm 2 using a pump-probe experiment where the probe laser was a high intensity Q-switched master oscillator power amplifier system. The extraction data was successfully fit to a homogeneous extraction model. The crystal quality of Czochralski grown Yb:S-FAP crystals, which have been plagued by many defects such as cracking, cloudiness, bubble core, slip dislocations, and anomalous absorption, was investigated interferometrically and quantified by means of Power Spectral Density (PSD) plots. The very best crystals grown to date were found to have adequate crystal quality for use in the Mercury laser system. In addition to phase distortions which are fixed by material growth, thermal

33 CFR 175.130 - Visual distress signals accepted.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Visual distress signals accepted... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.130 Visual distress signals accepted. (a) Any of the following signals, when carried in the number required, can be used to meet the...

33 CFR 175.130 - Visual distress signals accepted.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Visual distress signals accepted... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.130 Visual distress signals accepted. (a) Any of the following signals, when carried in the number required, can be used to meet the...

33 CFR 175.130 - Visual distress signals accepted.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Visual distress signals accepted... (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.130 Visual distress signals accepted. (a) Any of the following signals, when carried in the number required, can be used to meet the...

7 CFR 1427.175 - Liability of the producer.

Code of Federal Regulations, 2010 CFR

2010-01-01

... OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS COTTON Recourse Seed Cotton Loans § 1427.175... addition, seed cotton pledged as collateral for such loan shall not be released to the producer until such... repaid without regard to such producer's claimed share in the seed cotton pledged as collateral for the...

7 CFR 1427.175 - Liability of the producer.

Code of Federal Regulations, 2011 CFR

2011-01-01

... OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS COTTON Recourse Seed Cotton Loans § 1427.175... addition, seed cotton pledged as collateral for such loan shall not be released to the producer until such... repaid without regard to such producer's claimed share in the seed cotton pledged as collateral for the...

7 CFR 1427.175 - Liability of the producer.

Code of Federal Regulations, 2013 CFR

2013-01-01

... OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS COTTON Recourse Seed Cotton Loans § 1427.175... addition, seed cotton pledged as collateral for such loan shall not be released to the producer until such... repaid without regard to such producer's claimed share in the seed cotton pledged as collateral for the...

7 CFR 1427.175 - Liability of the producer.

Code of Federal Regulations, 2014 CFR

2014-01-01

... OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS COTTON Recourse Seed Cotton Loans § 1427.175... addition, seed cotton pledged as collateral for such loan shall not be released to the producer until such... repaid without regard to such producer's claimed share in the seed cotton pledged as collateral for the...

7 CFR 1427.175 - Liability of the producer.

Code of Federal Regulations, 2012 CFR

2012-01-01

... OF AGRICULTURE LOANS, PURCHASES, AND OTHER OPERATIONS COTTON Recourse Seed Cotton Loans § 1427.175... addition, seed cotton pledged as collateral for such loan shall not be released to the producer until such... repaid without regard to such producer's claimed share in the seed cotton pledged as collateral for the...

49 CFR 175.630 - Special requirements for Division 6.1 (poisonous) material and Division 6.2 (infectious...

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Special requirements for Division 6.1 (poisonous) material and Division 6.2 (infectious substances) materials. 175.630 Section 175.630 Transportation Other... Classification of Material § 175.630 Special requirements for Division 6.1 (poisonous) material and Division 6.2...

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

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Definition of âthe business of farming.â 1.175-3...-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business of farming if...

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

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Definition of âland used in farming.â 1.175-4...-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 business of farming and which meets both of the...

34 CFR 222.175 - What regulations apply to recipients of funds under this program?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 34 Education 1 2010-07-01 2010-07-01 false What regulations apply to recipients of funds under this program? 222.175 Section 222.175 Education Regulations of the Offices of the Department of Education OFFICE OF ELEMENTARY AND SECONDARY EDUCATION, DEPARTMENT OF EDUCATION IMPACT AID PROGRAMS Impact...

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

Code of Federal Regulations, 2013 CFR

2013-07-01

... purpose space may the Department of Commerce lease? 102-73.175 Section 102-73.175 Public Contracts and... § 102-73.175 What types of special purpose space may the Department of Commerce lease? The Department of Commerce is delegated authority to lease the following types of special purpose space: (a) Space required...

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

Code of Federal Regulations, 2014 CFR

2014-01-01

... purpose space may the Department of Commerce lease? 102-73.175 Section 102-73.175 Public Contracts and... § 102-73.175 What types of special purpose space may the Department of Commerce lease? The Department of Commerce is delegated authority to lease the following types of special purpose space: (a) Space required...

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

Code of Federal Regulations, 2012 CFR

2012-01-01

... purpose space may the Department of Commerce lease? 102-73.175 Section 102-73.175 Public Contracts and... § 102-73.175 What types of special purpose space may the Department of Commerce lease? The Department of Commerce is delegated authority to lease the following types of special purpose space: (a) Space required...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... purpose space may the Department of Commerce lease? 102-73.175 Section 102-73.175 Public Contracts and... § 102-73.175 What types of special purpose space may the Department of Commerce lease? The Department of Commerce is delegated authority to lease the following types of special purpose space: (a) Space required...

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

Code of Federal Regulations, 2010 CFR

2010-07-01

... purpose space may the Department of Commerce lease? 102-73.175 Section 102-73.175 Public Contracts and... § 102-73.175 What types of special purpose space may the Department of Commerce lease? The Department of Commerce is delegated authority to lease the following types of special purpose space: (a) Space required...

175Hp contrarotating homopolar motor design report

NASA Astrophysics Data System (ADS)

Cannell, Michael J.; Drake, John L.; McConnell, Richard A.; Martino, William R.

1994-06-01

A normally conducting contrarotating homopolar motor has been designed and constructed. The reaction torque, in the outer rotor, from the inner rotor is utilized to produce true contrarotation. The machine utilizes liquid cooled conductors, high performance liquid metal current collectors, and ferrous conductors in the active region. The basic machine output is 175 hp at + or - 1,200 rpm with an input of 4 volts and 35,000 amps.

33 CFR 175.130 - Visual distress signals accepted.

Code of Federal Regulations, 2010 CFR

2010-07-01

... red flare (160.024 or 160.036) meets both day and night requirements. Three hand held orange smoke (160.037) with one electric distress light (161.013) meet both day and night requirements. Table 175... Number required 160.021 Hand Held Red Flare Distress Signals 3 Day and Night 3 160.022 Floating Orange...

Triple-wavelength passively Q-switched ytterbium-doped fibre laser using zinc oxide nanoparticles film as a saturable absorber

NASA Astrophysics Data System (ADS)

Mohsin Al-Hayali, Sarah Kadhim; Hadi Al-Janabi, Abdul

2018-07-01

We report on the generation of a triple-wavelength passively Q-switched ytterbium-doped fibre laser using a saturable absorber (SA) based on zinc oxide nanoparticles (ZnO NPs) film. The SA was fabricated by embedding ZnO NPs powder into a polyvinyl alcohol as a host polymer. By properly adjusting the pump power and the polarization state, single-, dual- and triple-wavelength Q-switching are stably generated without additional components (such as optical filter, or fibre grating). For the triple wavelength operation, the fibre laser generates a maximum pulse repetition of 87.9 kHz with the shortest pulse duration of 2.7 μs. To the best of authors' knowledge, it's the first demonstration of triple-wavelength passively Q-switching fibre laser using ZnO NPs as a SA. Our results suggest that ZnO is a promising SA for multi-wavelength laser operation.

33 CFR 175.110 - Visual distress signals required.

Code of Federal Regulations, 2010 CFR

2010-07-01

... onboard. Devices suitable for day use and devices suitable for night use, or devices suitable for both day and night use, must be carried. (b) Between sunset and sunrise, no person may use a boat less than 16 feet in length unless visual distress signals suitable for night use, selected from the list in § 175...

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

Creep Behavior of Hafnia and Ytterbium Silicate Environmental Barrier Coating Systems on SiC/SiC Ceramic Matrix Composites

NASA Technical Reports Server (NTRS)

Zhu, Dongming; Fox, Dennis S.; Ghosn, Louis J.; Harder, Bryan

2011-01-01

Environmental barrier coatings will play a crucial role in future advanced gas turbine engines because of their ability to significantly extend the temperature capability and stability of SiC/SiC ceramic matrix composite (CMC) engine components, thus improving the engine performance. In order to develop high performance, robust coating systems for engine components, appropriate test approaches simulating operating temperature gradient and stress environments for evaluating the critical coating properties must be established. In this paper, thermal gradient mechanical testing approaches for evaluating creep and fatigue behavior of environmental barrier coated SiC/SiC CMC systems will be described. The creep and fatigue behavior of Hafnia and ytterbium silicate environmental barrier coatings on SiC/SiC CMC systems will be reported in simulated environmental exposure conditions. The coating failure mechanisms will also be discussed under the heat flux and stress conditions.

High-power, single-frequency, continuous-wave second-harmonic-generation of ytterbium fiber laser in PPKTP and MgO:sPPLT.

PubMed

Kumar, S Chaitanya; Samanta, G K; Ebrahim-Zadeh, M

2009-08-03

Characteristics of high-power, narrow-linewidth, continuous-wave (cw) green radiation obtained by simple single-pass second-harmonic-generation (SHG) of a cw ytterbium fiber laser at 1064 nm in the nonlinear crystals of PPKTP and MgO:sPPLT are studied and compared. Temperature tuning and SHG power scaling up to nearly 10 W for input fundamental power levels up to 30 W are performed. Various contributions to thermal effects in both crystals, limiting the SHG conversion efficiency, are studied. Optimal focusing conditions and thermal management schemes are investigated to maximize SHG performance in MgO:sPPLT. Stable green output power and high spatial beam quality with M(2)<1.33 and M(2)<1.34 is achieved in MgO:sPPLT and PPKTP, respectively.

14 CFR 135.175 - Airborne weather radar equipment requirements.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne weather...

14 CFR 135.175 - Airborne weather radar equipment requirements.

Code of Federal Regulations, 2012 CFR

2012-01-01

... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne weather...

14 CFR 135.175 - Airborne weather radar equipment requirements.

Code of Federal Regulations, 2013 CFR

2013-01-01

... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne weather...

14 CFR 135.175 - Airborne weather radar equipment requirements.

Code of Federal Regulations, 2014 CFR

2014-01-01

... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne weather...

14 CFR 135.175 - Airborne weather radar equipment requirements.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne weather...

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

21. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN ...

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

21. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN TEEMING AISLE OF THE BOP SHOP LOOKING SOUTHEAST. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

The World Leader in Health Information and Innovation Celebrates 175 Years | NIH MedlinePlus the Magazine

MedlinePlus

... NLM 175th Anniversary The World Leader in Health Information and Innovation Celebrates 175 Years Past Issues / Winter ... betterment of American–and global–human health. Creating Information Resources for Researchers Since the dawn of the ...

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

CsPbBr{sub 3} nanocrystal saturable absorber for mode-locking ytterbium fiber laser

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zhou, Yan; Li, Yue; Xu, Jianqiu

Cesium lead halide perovskite nanocrystals (CsPbX{sub 3}, X = Cl, Br, I) have been reported as efficient light-harvesting and light-emitting semiconductor materials, but their nonlinear optical properties have been seldom touched upon. In this paper, we prepare layered CsPbBr{sub 3} nanocrystal films and characterize their physical properties. Broadband linear absorption from ∼0.8 to over 2.2 μm and nonlinear optical absorption at the 1-μm wavelength region are measured. The CsPbBr{sub 3} saturable absorber (SA), manufactured by drop-casting of colloidal CsPbBr{sub 3} liquid solution on a gold mirror, shows modulation depth and saturation intensity of 13.1% and 10.7 MW/cm{sup 2}, respectively. With this SA, mode-locking operationmore » of a polarization-maintained ytterbium fiber laser produces single pulses with duration of ∼216 ps, maximum average output power of 10.5 mW, and the laser spectrum is centered at ∼1076 nm. This work shows that CsPbBr{sub 3} films can be efficient SA candidates for fiber lasers and also have great potential to become broadband linear and nonlinear optical materials for photonics and optoelectronics.« less

20 CFR 402.175 - Fees for providing information and related services for non-program purposes.

Code of Federal Regulations, 2010 CFR

2010-04-01

... Act; and (2) Full cost of an employee's time includes fringe benefits and overhead costs such as rent... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Fees for providing information and related services for non-program purposes. 402.175 Section 402.175 Employees' Benefits SOCIAL SECURITY...

18 CFR 367.1750 - Account 175, Derivative instrument assets.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Account 175, Derivative instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY... instrument assets. This account must include the amounts paid for derivative instruments, and the change in...

18 CFR 367.1750 - Account 175, Derivative instrument assets.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 18 Conservation of Power and Water Resources 1 2012-04-01 2012-04-01 false Account 175, Derivative instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY... instrument assets. This account must include the amounts paid for derivative instruments, and the change in...

30 CFR 62.175 - Notification of results; reporting requirements.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Notification of results; reporting requirements... UNIFORM MINE HEALTH REGULATIONS OCCUPATIONAL NOISE EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The mine operator must, within 10 working days of receiving the results of an audiogram, or...

30 CFR 62.175 - Notification of results; reporting requirements.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Notification of results; reporting requirements... UNIFORM MINE HEALTH REGULATIONS OCCUPATIONAL NOISE EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The mine operator must, within 10 working days of receiving the results of an audiogram, or...

30 CFR 62.175 - Notification of results; reporting requirements.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Notification of results; reporting requirements... UNIFORM MINE HEALTH REGULATIONS OCCUPATIONAL NOISE EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The mine operator must, within 10 working days of receiving the results of an audiogram, or...

30 CFR 62.175 - Notification of results; reporting requirements.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Notification of results; reporting requirements... UNIFORM MINE HEALTH REGULATIONS OCCUPATIONAL NOISE EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The mine operator must, within 10 working days of receiving the results of an audiogram, or...

30 CFR 62.175 - Notification of results; reporting requirements.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Notification of results; reporting requirements... UNIFORM MINE HEALTH REGULATIONS OCCUPATIONAL NOISE EXPOSURE § 62.175 Notification of results; reporting requirements. (a) The mine operator must, within 10 working days of receiving the results of an audiogram, or...

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

PubMed

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

2014-02-01

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 μm. 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.

49 CFR 40.175 - What steps does the first laboratory take with a split specimen?

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 1 2010-10-01 2010-10-01 false What steps does the first laboratory take with a split specimen? 40.175 Section 40.175 Transportation Office of the Secretary of Transportation... steps does the first laboratory take with a split specimen? (a) As the laboratory at which the primary...

20. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN ...

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

20. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN TEEMING AISLE OF THE BOP SHOP LOOKING SOUTHEAST. HISTORIAN FOR SCALE. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

Ultracold Mixtures of Rubidium and Ytterbium for Open Quantum System Engineering

NASA Astrophysics Data System (ADS)

Herold, Creston David

Exquisite experimental control of quantum systems has led to sharp growth of basic quantum research in recent years. Controlling dissipation has been crucial in producing ultracold, trapped atomic samples. Recent theoretical work has suggested dissipation can be a useful tool for quantum state preparation. Controlling not only how a system interacts with a reservoir, but the ability to engineer the reservoir itself would be a powerful platform for open quantum system research. Toward this end, we have constructed an apparatus to study ultracold mixtures of rubidium (Rb) and ytterbium (Yb). We have developed a Rb-blind optical lattice at 423.018(7) nm, which will enable us to immerse a lattice of Yb atoms (the system) into a Rb BEC (superfluid reservoir). We have produced Bose-Einstein condensates of 170Yb and 174Yb, two of the five bosonic isotopes of Yb, which also has two fermionic isotopes. Flexible optical trapping of Rb and Yb was achieved with a two-color dipole trap of 532 and 1064 nm, and we observed thermalization in ultracold mixtures of Rb and Yb. Using the Rb-blind optical lattice, we measured very small light shifts of 87Rb BECs near the light shift zero-wavelengths adjacent the 6p electronic states, through a coherent series of lattice pulses. The positions of the zero-wavelengths are sensitive to the electric dipole matrix elements between the 5s and 6p states, and we made the first experimental measurement of their strength. By measuring a light shift, we were not sensitive to excited state branching ratios, and we achieved a precision better than 0.3%.

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

Code of Federal Regulations, 2010 CFR

2010-01-01

... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations. (a...

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

Code of Federal Regulations, 2013 CFR

2013-01-01

... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations. (a...

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

Code of Federal Regulations, 2014 CFR

2014-01-01

... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations. (a...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations. (a...

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

Code of Federal Regulations, 2012 CFR

2012-01-01

... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations. (a...

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

Code of Federal Regulations, 2014 CFR

2014-04-01

...-isopropylidenediphenol-epichlorohydrin epoxy resins. 175.380 Section 175.380 Food and Drugs FOOD AND DRUG ADMINISTRATION...,4′-isopropylidenediphenol-epichlorohydrin epoxy resins. The resins identified in paragraph (a) of... condensation of xylene-formaldehyde resin and 4,4′-isopropylidenediphenol-epichlorohydrin epoxy resins, to...

175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ...

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

175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ELEVATOR ADDITION OF 1905. WALL IS EXTERIOR OF ORIGINAL WAGON WORKS OF 1883. - Gruber Wagon Works, Pennsylvania Route 183 & State Hill Road at Red Bridge Park, Bernville, Berks County, PA

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

Code of Federal Regulations, 2010 CFR

2010-04-01

...-isopropylidenediphenol-epichlorohydrin epoxy resins. 175.380 Section 175.380 Food and Drugs FOOD AND DRUG ADMINISTRATION... Xylene-formaldehyde resins condensed with 4,4′-isopropylidenediphenol-epichlorohydrin epoxy resins. The...′-isopropylidenediphenol-epichlorohydrin epoxy resins, to which may have been added certain optional adjuvant substances...

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

Code of Federal Regulations, 2011 CFR

2011-04-01

...-isopropylidenediphenol-epichlorohydrin epoxy resins. 175.380 Section 175.380 Food and Drugs FOOD AND DRUG ADMINISTRATION... Xylene-formaldehyde resins condensed with 4,4′-isopropylidenediphenol-epichlorohydrin epoxy resins. The...′-isopropylidenediphenol-epichlorohydrin epoxy resins, to which may have been added certain optional adjuvant substances...

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

Code of Federal Regulations, 2012 CFR

2012-04-01

...-isopropylidenediphenol-epichlorohydrin epoxy resins. 175.380 Section 175.380 Food and Drugs FOOD AND DRUG ADMINISTRATION... Xylene-formaldehyde resins condensed with 4,4′-isopropylidenediphenol-epichlorohydrin epoxy resins. The...′-isopropylidenediphenol-epichlorohydrin epoxy resins, to which may have been added certain optional adjuvant substances...

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

Code of Federal Regulations, 2013 CFR

2013-04-01

...-isopropylidenediphenol-epichlorohydrin epoxy resins. 175.380 Section 175.380 Food and Drugs FOOD AND DRUG ADMINISTRATION... Xylene-formaldehyde resins condensed with 4,4′-isopropylidenediphenol-epichlorohydrin epoxy resins. The...′-isopropylidenediphenol-epichlorohydrin epoxy resins, to which may have been added certain optional adjuvant substances...

X-ray Excitation Triggers Ytterbium Anomalous Emission in CaF2:Yb but Not in SrF2:Yb.

PubMed

Hughes-Currie, Rosa B; Ivanovskikh, Konstantin V; Wells, Jon-Paul R; Reid, Michael F; Gordon, Robert A; Seijo, Luis; Barandiarán, Zoila

2017-03-16

Materials that luminesce after excitation with ionizing radiation are extensively applied in physics, medicine, security, and industry. Lanthanide dopants are known to trigger crystal scintillation through their fast d-f emissions; the same is true for other important applications as lasers or phosphors for lighting. However, this ability can be seriously compromised by unwanted anomalous emissions often found with the most common lanthanide activators. We report high-resolution X-ray-excited optical (IR to UV) luminescence spectra of CaF 2 :Yb and SrF 2 :Yb samples excited at 8949 eV and 80 K. Ionizing radiation excites the known anomalous emission of ytterbium in the CaF 2 host but not in the SrF 2 host. Wave function-based ab initio calculations of host-to-dopant electron transfer and Yb 2+ /Yb 3+ intervalence charge transfer explain the difference. The model also explains the lack of anomalous emission in Yb-doped SrF 2 excited by VUV radiation.

Deep-tissue two-photon imaging in brain and peripheral nerve with a compact high-pulse energy ytterbium fiber laser

NASA Astrophysics Data System (ADS)

Fontaine, Arjun K.; Kirchner, Matthew S.; Caldwell, John H.; Weir, Richard F.; Gibson, Emily A.

2018-02-01

Two-photon microscopy is a powerful tool of current scientific research, allowing optical visualization of structures below the surface of tissues. This is of particular value in neuroscience, where optically accessing regions within the brain is critical for the continued advancement in understanding of neural circuits. However, two-photon imaging at significant depths have typically used Ti:Sapphire based amplifiers that are prohibitively expensive and bulky. In this study, we demonstrate deep tissue two-photon imaging using a compact, inexpensive, turnkey operated Ytterbium fiber laser (Y-Fi, KM Labs). The laser is based on all-normal dispersion (ANDi) that provides short pulse durations and high pulse energies. Depth measurements obtained in ex vivo mouse cortex exceed those obtainable with standard two-photon microscopes using Ti:Sapphire lasers. In addition to demonstrating the capability of deep-tissue imaging in the brain, we investigated imaging depth in highly-scattering white matter with measurements in sciatic nerve showing limited optical penetration of heavily myelinated nerve tissue relative to grey matter.

Ytterbium-selective polymeric membrane electrode based on substituted urea and thiourea as a suitable carrier.

PubMed

Singh, A K; Jain, A K; Mehtab, Sameena

2007-08-06

Plasticized membranes using 1-phenyl-3-(2-thiazolyl)-2-thiourea (PTT) and 1-phenyl-3-(2-thiazolyl)-2-urea (PTU) have been prepared and explored as ytterbium ion-selective sensors. Effect of various plasticizers, viz. chloronaphthalene (CN), o-nitrophenyloctyl ether (o-NPOE), dibutylphthalate (DBP), dioctylsebacate (DOS) and anion excluders, sodium tetraphenylborate (NaTPB) and oleic acid (OA) was studied and improved membrane performance was observed. Optimum performance was noted with membrane of PTT having composition of PTT (3.5):PVC (80):DOS (160):NaTPB (1.5) in mg. The sensor works satisfactorily in the concentration range 1.2x10(-7) to 1.0x10(-2) M (detection limit 5.5x10(-8) M) with a Nernstian slope of 19.7 mV decade(-1) of activity. Wide pH range (3.0-8.0), fast response time (10 s), non-aqueous tolerance (up to 20%) and adequate shelf life (12 weeks) indicate the vital utility of the proposed sensor. The proposed electrode comparatively shows good selectivity for Yb3+ ion with respect to alkali, alkaline earth, transition and rare earth metals ions and can be used for its determination in binary mixtures and sulfite determination in white and red wine samples.

Compact fs ytterbium fiber laser at 1010 nm for biomedical applications.

PubMed

Kong, Cihang; Pilger, Christian; Hachmeister, Henning; Wei, Xiaoming; Cheung, Tom H; Lai, Cora S W; Huser, Thomas; Tsia, Kevin K; Wong, Kenneth K Y

2017-11-01

Ytterbium-doped fiber lasers (YDFLs) working in the near-infrared (NIR) spectral window and capable of high-power operation are popular in recent years. They have been broadly used in a variety of scientific and industrial research areas, including light bullet generation, optical frequency comb formation, materials fabrication, free-space laser communication, and biomedical diagnostics as well. The growing interest in YDFLs has also been cultivated for the generation of high-power femtosecond (fs) pulses. Unfortunately, the operating wavelengths of fs YDFLs have mostly been confined to two spectral bands, i.e., 970-980 nm through the three-level energy transition and 1030-1100 nm through the quasi three-level energy transition, leading to a spectral gap (990-1020 nm) in between, which is attributed to an intrinsically weak gain in this wavelength range. Here we demonstrate a high-power mode-locked fs YDFL operating at 1010 nm, which is accomplished in a compact and cost-effective package. It exhibits superior performance in terms of both short-term and long-term stability, i.e., <0.3% (peak intensity over 2.4 μs) and <4.0% (average power over 24 hours), respectively. To illustrate the practical applications, it is subsequently employed as a versatile fs laser for high-quality nonlinear imaging of biological samples, including two-photon excited fluorescence microscopy of mouse kidney and brain sections, as well as polarization-sensitive second-harmonic generation microscopy of potato starch granules and mouse tail muscle. It is anticipated that these efforts will largely extend the capability of fs YDFLs which is continuously tunable over 970-1100 nm wavelength range for wideband hyperspectral operations, serving as a promising complement to the gold-standard Ti:sapphire fs lasers.

Compact fs ytterbium fiber laser at 1010 nm for biomedical applications

PubMed Central

Kong, Cihang; Pilger, Christian; Hachmeister, Henning; Wei, Xiaoming; Cheung, Tom H.; Lai, Cora S. W.; Huser, Thomas; Tsia, Kevin. K.; Wong, Kenneth K. Y.

2017-01-01

Ytterbium-doped fiber lasers (YDFLs) working in the near-infrared (NIR) spectral window and capable of high-power operation are popular in recent years. They have been broadly used in a variety of scientific and industrial research areas, including light bullet generation, optical frequency comb formation, materials fabrication, free-space laser communication, and biomedical diagnostics as well. The growing interest in YDFLs has also been cultivated for the generation of high-power femtosecond (fs) pulses. Unfortunately, the operating wavelengths of fs YDFLs have mostly been confined to two spectral bands, i.e., 970-980 nm through the three-level energy transition and 1030-1100 nm through the quasi three-level energy transition, leading to a spectral gap (990-1020 nm) in between, which is attributed to an intrinsically weak gain in this wavelength range. Here we demonstrate a high-power mode-locked fs YDFL operating at 1010 nm, which is accomplished in a compact and cost-effective package. It exhibits superior performance in terms of both short-term and long-term stability, i.e., <0.3% (peak intensity over 2.4 μs) and <4.0% (average power over 24 hours), respectively. To illustrate the practical applications, it is subsequently employed as a versatile fs laser for high-quality nonlinear imaging of biological samples, including two-photon excited fluorescence microscopy of mouse kidney and brain sections, as well as polarization-sensitive second-harmonic generation microscopy of potato starch granules and mouse tail muscle. It is anticipated that these efforts will largely extend the capability of fs YDFLs which is continuously tunable over 970-1100 nm wavelength range for wideband hyperspectral operations, serving as a promising complement to the gold-standard Ti:sapphire fs lasers. PMID:29188091

Spectral characterization and white light generation by yttrium silicate nanopowders undoped and doped with Ytterbium(III) at different concentrations when excited by a laser diode at 975 nm

NASA Astrophysics Data System (ADS)

Cinkaya, Hatun; Eryurek, Gonul; Bilir, Gokhan; Collins, John; Di Bartolo, Baldassare

2017-01-01

We have studied nanophosphors of yttrium silicate (YSO) undoped and doped with different concentration of ytterbium (Yb3+) synthesized by using the sol-gel method. Structural and luminescence properties of the nanophosphors were studied experimentally by using different analytical techniques. For the structural analysis, we performed X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectrometry (EDS) measurements. Upconversion (UC) and the white light (WL) emission properties were investigated by using the near infrared cw laser excitation of 975 nm. The spectral properties have been found to depend on several physical parameters.

40 CFR 408.175 - Standards of performance for new sources.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Mechanized Salmon Processing Subcategory § 408.175 Standards of performance for new sources. (a) The...: (1) Any mechanized salmon processing facility located in population or processing centers including... grease 28 10 pH (1) (1) 1 Within the range 6.0 to 9.0. (2) Any mechanized salmon processing facility not...

40 CFR 408.175 - Standards of performance for new sources.

Code of Federal Regulations, 2011 CFR

2011-07-01

... Mechanized Salmon Processing Subcategory § 408.175 Standards of performance for new sources. (a) The...: (1) Any mechanized salmon processing facility located in population or processing centers including... grease 28 10 pH (1) (1) 1 Within the range 6.0 to 9.0. (2) Any mechanized salmon processing facility not...

Dual-wavelength passively Q-switched ytterbium-doped fiber laser using Fe3O4-nanoparticle saturable absorber and intracavity polarization

NASA Astrophysics Data System (ADS)

Al-Hayali, S. K. M.; Al-Janabi, A. H.

2018-03-01

We have experimentally demonstrated the operation of a dual-wavelength passively Q-switched ytterbium-doped fiber laser by using a saturable absorber (SA) based on Fe3O4 nanoparticles in a magnetic fluid. The SA was fabricated by depositing magnetic fluid at the end of an optical fiber ferrule. By performing adjustments to the pump power and polarization controller state in the cavity, a stable dual-wavelength lasing operation was generated without intracavity spectral filters or modulation elements. The Q-switched laser output was achieved at a pump threshold of 80 mW with a maximum output pulse energy of 38.8 nJ, a repetition rate of 73.4 kHz and a minimum pulse width of 3.4 µs. To the best of the authors’ knowledge, this is the first demonstration of a dual-wavelength passively Q-switched fiber laser using Fe3O4 nanoparticles as the SA in the 1.0 µm operation region.

42 CFR 410.175 - Alien absent from the United States.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 42 Public Health 2 2014-10-01 2014-10-01 false Alien absent from the United States. 410.175... Alien absent from the United States. (a) Medicare does not pay Part B benefits for services furnished to... during the first full calendar month the alien is back in the United States. [53 FR 6634, Mar. 2, 1988] ...

42 CFR 410.175 - Alien absent from the United States.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 42 Public Health 2 2013-10-01 2013-10-01 false Alien absent from the United States. 410.175... Alien absent from the United States. (a) Medicare does not pay Part B benefits for services furnished to... during the first full calendar month the alien is back in the United States. [53 FR 6634, Mar. 2, 1988] ...

42 CFR 410.175 - Alien absent from the United States.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 42 Public Health 2 2012-10-01 2012-10-01 false Alien absent from the United States. 410.175... Alien absent from the United States. (a) Medicare does not pay Part B benefits for services furnished to... during the first full calendar month the alien is back in the United States. [53 FR 6634, Mar. 2, 1988] ...

42 CFR 410.175 - Alien absent from the United States.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 42 Public Health 2 2011-10-01 2011-10-01 false Alien absent from the United States. 410.175... Alien absent from the United States. (a) Medicare does not pay Part B benefits for services furnished to... during the first full calendar month the alien is back in the United States. [53 FR 6634, Mar. 2, 1988] ...

42 CFR 410.175 - Alien absent from the United States.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 42 Public Health 2 2010-10-01 2010-10-01 false Alien absent from the United States. 410.175... Alien absent from the United States. (a) Medicare does not pay Part B benefits for services furnished to... during the first full calendar month the alien is back in the United States. [53 FR 6634, Mar. 2, 1988] ...

25 CFR 900.175 - Will an appeal hurt an Indian tribe or tribal organization's position in other contract...

Code of Federal Regulations, 2013 CFR

2013-04-01

... organization's position in other contract negotiations? 900.175 Section 900.175 Indians BUREAU OF INDIAN... CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT Appeals Appeals of Emergency Reassumption of Self-Determination Contracts Or Suspensions, Withholding Or Delay of Payments Under A Self...

25 CFR 900.175 - Will an appeal hurt an Indian tribe or tribal organization's position in other contract...

Code of Federal Regulations, 2011 CFR

2011-04-01

... organization's position in other contract negotiations? 900.175 Section 900.175 Indians BUREAU OF INDIAN... CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT Appeals Appeals of Emergency Reassumption of Self-Determination Contracts Or Suspensions, Withholding Or Delay of Payments Under A Self...

25 CFR 900.175 - Will an appeal hurt an Indian tribe or tribal organization's position in other contract...

Code of Federal Regulations, 2014 CFR

2014-04-01

... organization's position in other contract negotiations? 900.175 Section 900.175 Indians BUREAU OF INDIAN... CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT Appeals Appeals of Emergency Reassumption of Self-Determination Contracts Or Suspensions, Withholding Or Delay of Payments Under A Self...

25 CFR 900.175 - Will an appeal hurt an Indian tribe or tribal organization's position in other contract...

Code of Federal Regulations, 2012 CFR

2012-04-01

... organization's position in other contract negotiations? 900.175 Section 900.175 Indians BUREAU OF INDIAN... CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT Appeals Appeals of Emergency Reassumption of Self-Determination Contracts Or Suspensions, Withholding Or Delay of Payments Under A Self...

25 CFR 900.175 - Will an appeal hurt an Indian tribe or tribal organization's position in other contract...

Code of Federal Regulations, 2010 CFR

2010-04-01

... organization's position in other contract negotiations? 900.175 Section 900.175 Indians BUREAU OF INDIAN... CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT Appeals Appeals of Emergency Reassumption of Self-Determination Contracts Or Suspensions, Withholding Or Delay of Payments Under A Self...

Numerical analysis of lasing characteristics in highly bend-compensated large-mode-area ytterbium-doped double-clad leakage channel fibers.

PubMed

Thavasi Raja, G; Halder, Raktim; Varshney, S K

2015-12-10

The bend-induced mode-area reduction and thermal effects are vital factors that affect the power scaling of fiber lasers. Recently, bend-compensated large-mode-area double-clad modified hybrid leakage channel fiber (M-HLCF) has been reported with a mode area greater than 1000  μm, while sustaining the single-mode behavior at 1064 nm for high-temperature environments. In this work, the lasing characteristics of a newly designed ytterbium-doped double-clad M-HLCF (YDMHLCF) have been numerically investigated for strongly pumped conditions. The doped region size is optimally found through simulations, equivalent to the size of core diameter ∼38  μm in order to achieve maximum conversion efficiency for the bent and straight cases. Numerical simulations further confirm that a 2 m long YDMHLCF exhibits slope efficiency of 78% and conversion efficiency of 79% for the straight case and also almost the same for the practical bending radius of 7.5 cm when pumped with a 975 nm laser source.

41 CFR 102-85.175 - Are the standard level services for cleaning, mechanical operation, and maintenance identified in...

Code of Federal Regulations, 2011 CFR

2011-01-01

... 41 Public Contracts and Property Management 3 2011-01-01 2011-01-01 false Are the standard level services for cleaning, mechanical operation, and maintenance identified in an OA? 102-85.175 Section 102-85.175 Public Contracts and Property Management Federal Property Management Regulations System (Continued...

26 CFR 1.175-6 - Adoption or change of method.

Code of Federal Regulations, 2010 CFR

2010-04-01

... project or farm as to which the method or change of method is to apply; (4) Set forth the amount of all... farm. The authorization with respect to the special project or single farm will not affect the method... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Adoption or change of method. 1.175-6 Section 1...

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

Code of Federal Regulations, 2010 CFR

2010-07-01

... what property is potentially available for donation? 102-37.175 Section 102-37.175 Public Contracts and... REGULATION PERSONAL PROPERTY 37-DONATION OF SURPLUS PERSONAL PROPERTY State Agency for Surplus Property (SASP... available for donation? A SASP may conduct onsite screening at various Federal facilities, contact or submit...

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

Code of Federal Regulations, 2013 CFR

2013-07-01

... what property is potentially available for donation? 102-37.175 Section 102-37.175 Public Contracts and... REGULATION PERSONAL PROPERTY 37-DONATION OF SURPLUS PERSONAL PROPERTY State Agency for Surplus Property (SASP... available for donation? A SASP may conduct onsite screening at various Federal facilities, contact or submit...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... what property is potentially available for donation? 102-37.175 Section 102-37.175 Public Contracts and... REGULATION PERSONAL PROPERTY 37-DONATION OF SURPLUS PERSONAL PROPERTY State Agency for Surplus Property (SASP... available for donation? A SASP may conduct onsite screening at various Federal facilities, contact or submit...

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

Code of Federal Regulations, 2014 CFR

2014-01-01

... what property is potentially available for donation? 102-37.175 Section 102-37.175 Public Contracts and... REGULATION PERSONAL PROPERTY 37-DONATION OF SURPLUS PERSONAL PROPERTY State Agency for Surplus Property (SASP... available for donation? A SASP may conduct onsite screening at various Federal facilities, contact or submit...

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

Code of Federal Regulations, 2012 CFR

2012-01-01

... what property is potentially available for donation? 102-37.175 Section 102-37.175 Public Contracts and... REGULATION PERSONAL PROPERTY 37-DONATION OF SURPLUS PERSONAL PROPERTY State Agency for Surplus Property (SASP... available for donation? A SASP may conduct onsite screening at various Federal facilities, contact or submit...

41 CFR 102-85.175 - Are the standard level services for cleaning, mechanical operation, and maintenance identified in...

Code of Federal Regulations, 2010 CFR

2010-07-01

... services for cleaning, mechanical operation, and maintenance identified in an OA? 102-85.175 Section 102-85... of Service § 102-85.175 Are the standard level services for cleaning, mechanical operation, and..., mechanical operation, and maintenance shall be provided in accordance with the GSA standard level of services...

Loss of partitioning-defective-3/isotype-specific interacting protein (par-3/ASIP) in the elongating spermatid of RA175 (IGSF4A/SynCAM)-deficient mice.

PubMed

Fujita, Eriko; Tanabe, Yuko; Hirose, Tomonori; Aurrand-Lions, Michel; Kasahara, Tadashi; Imhof, Beat A; Ohno, Shigeo; Momoi, Takashi

2007-12-01

IGSF4a/RA175/SynCAM (RA175) and junctional adhesion molecules (Jams) are members of the immunoglobulin superfamily with a PDZ-binding domain at their C termini. Deficiency of Ra175 (Ra175(-/-)) as well as Jam-C deficiency (Jam-C(-/-)) causes the defect of the spermatid differentiation, oligo-astheno-teratozoospermia. Ra175(-/-) elongating spermatids fail to mature further, whereas Jam-C(-/-) round spermatids lose cell polarity, and most of Jam-C(-/-) elongated spermatids are completely lost. RA175 and Jam-C seem to have similar but distinct functional roles during spermatid differentiation. Here we show that the cell polarity protein Par-3 with PDZ domains, a binding partner of Jams, is one of the associated proteins of the cytoplasmic region of RA175 in testis. Par-3 and Jam-C are partly co-localized with RA175 in the elongating and elongated spermatids; their distributions overlapped with that of RA175 on the tips of the dorsal region of the head of the elongating spermatid (steps 9 to 12) in the wild type. In the Ra175(-/-) elongating spermatid, Par-3 was absent, and Jam-C was absent or abnormally localized. The RA175 formed a ternary complex with Jam-C via interaction with Par-3. The lack of the ternary complex in the Ra175(-/-) elongating spermatid may cause the defect of the specialized adhesion structures, resulting in the oligo-astheno-teratozoospermia.

A beamforming study for implementation of vibro-acoustography with a 1.75-D array transducer.

PubMed

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

2013-03-01

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, Δf, to vibrate tissue at Δf. 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 1-D linear-array transducers. In this article, we discuss VA beamforming and image formation using a 1.75-D array transducer. A 1.75-D array transducer has several rows of elements in the elevation direction which can be controlled independently for focusing. The advantage of the 1.75-D array over a 1-D 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 1.75-D array transducer offers several advantages over scanning with a linear-array transducer, including improved image resolution and contrast resulting from better elevation focusing of the imaging point-spread function.

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

PubMed Central

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

2013-01-01

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, Δf, to vibrate tissue at Δf. 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

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

Code of Federal Regulations, 2010 CFR

2010-01-01

... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Protection of other airplane components... CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD... Requirements § 125.175 Protection of other airplane components against fire. (a) Except as provided in...

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

Code of Federal Regulations, 2013 CFR

2013-01-01

... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Protection of other airplane components... CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD... Requirements § 125.175 Protection of other airplane components against fire. (a) Except as provided in...

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

Code of Federal Regulations, 2014 CFR

2014-01-01

... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Protection of other airplane components... CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD... Requirements § 125.175 Protection of other airplane components against fire. (a) Except as provided in...

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

Code of Federal Regulations, 2012 CFR

2012-01-01

... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Protection of other airplane components... CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD... Requirements § 125.175 Protection of other airplane components against fire. (a) Except as provided in...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Protection of other airplane components... CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD... Requirements § 125.175 Protection of other airplane components against fire. (a) Except as provided in...

The Orphan G Protein-coupled Receptor Gpr175 (Tpra40) Enhances Hedgehog Signaling by Modulating cAMP Levels.

PubMed

Singh, Jaskirat; Wen, Xiaohui; Scales, Suzie J

2015-12-04

The Hedgehog (Hh) signaling pathway plays an essential role in vertebrate embryonic tissue patterning of many developing organs. Signaling occurs predominantly in primary cilia and is initiated by the entry of the G protein-coupled receptor (GPCR)-like protein Smoothened into cilia and culminates in gene transcription via the Gli family of transcription factors upon their nuclear entry. Here we identify an orphan GPCR, Gpr175 (also known as Tpra1 or Tpra40: transmembrane protein, adipocyte associated 1 or of 40 kDa), which also localizes to primary cilia upon Hh stimulation and positively regulates Hh signaling. Interaction experiments place Gpr175 at the level of PKA and upstream of the Gαi component of heterotrimeric G proteins, which itself localizes to cilia and can modulate Hh signaling. Gpr175 or Gαi1 depletion leads to increases in cellular cAMP levels and in Gli3 processing into its repressor form. Thus we propose that Gpr175 coupled to Gαi1 normally functions to inhibit the production of cAMP by adenylyl cyclase upon Hh stimulation, thus maximizing signaling by turning off PKA activity and hence Gli3 repressor formation. Taken together our data suggest that Gpr175 is a novel positive regulator of the Hh signaling pathway. © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.

Low Ultraviolet B and Increased Risk of Brain Cancer: An Ecological Study of 175 Countries

DTIC Science & Technology

2009-07-01

strong impact on risk of brain cancer . However, there was now way to directly assess this in the current model given the data available to the...8217 . ’ . · ’ · ’ ’ . ’ . ’ ’ ’ Low. U/Jraviolet Band Increased . . . Ri$-k. of Brain . cancer :’ . .. A~ :Ec(!logical Study of 175 CiJun~ries...B and increased risk of brain cancer : an ecological study of 175 countries Sharif B. Mohr, M.P.H. 1,2, Edward D. Gorham1, M.P.H., Ph.D. 1,2

Decreased Sensitivity to Changes in the Concentration of Metal Ions as the Basis for the Hyperactivity of DtxR(E175K)

DOE Office of Scientific and Technical Information (OSTI.GOV)

D’Aquino, J. Alejandro; Denninger, Andrew R.; Moulin, Aaron G.

2010-01-12

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,more » 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

Loss of Partitioning-Defective-3/Isotype-Specific Interacting Protein (Par-3/ASIP) in the Elongating Spermatid of RA175 (IGSF4A/SynCAM)-Deficient Mice

PubMed Central

Fujita, Eriko; Tanabe, Yuko; Hirose, Tomonori; Aurrand-Lions, Michel; Kasahara, Tadashi; Imhof, Beat A.; Ohno, Shigeo; Momoi, Takashi

2007-01-01

IGSF4a/RA175/SynCAM (RA175) and junctional adhesion molecules (Jams) are members of the immunoglobulin superfamily with a PDZ-binding domain at their C termini. Deficiency of Ra175 (Ra175−/−) as well as Jam-C deficiency (Jam-C−/−) causes the defect of the spermatid differentiation, oligo-astheno-teratozoospermia. Ra175−/− elongating spermatids fail to mature further, whereas Jam-C−/− round spermatids lose cell polarity, and most of Jam-C−/− elongated spermatids are completely lost. RA175 and Jam-C seem to have similar but distinct functional roles during spermatid differentiation. Here we show that the cell polarity protein Par-3 with PDZ domains, a binding partner of Jams, is one of the associated proteins of the cytoplasmic region of RA175 in testis. Par-3 and Jam-C are partly co-localized with RA175 in the elongating and elongated spermatids; their distributions overlapped with that of RA175 on the tips of the dorsal region of the head of the elongating spermatid (steps 9 to 12) in the wild type. In the Ra175−/− elongating spermatid, Par-3 was absent, and Jam-C was absent or abnormally localized. The RA175 formed a ternary complex with Jam-C via interaction with Par-3. The lack of the ternary complex in the Ra175−/− elongating spermatid may cause the defect of the specialized adhesion structures, resulting in the oligo-astheno-teratozoospermia. PMID:18055550

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

DOE Office of Scientific and Technical Information (OSTI.GOV)

Li, Xiaochuan; Suphamungmee, Worawit; Janco, Miro

2012-08-03

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 ismore » 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

77 FR 14440 - National Council on the Arts 175th Meeting

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-09

... NATIONAL FOUNDATION FOR THE ARTS AND THE HUMANITIES National Council on the Arts 175th Meeting AGENCY: National Endowment for the Arts, National Foundation on the Arts and Humanities. ACTION: Notice..., notice is hereby given that a meeting of the National Council on the Arts will be held on March 30, 2012...

The effect of d and f states of ytterbium on the electronic and magnetic properties of Al1‑xYbxN: DFT+U study

NASA Astrophysics Data System (ADS)

Belhachi, S.

2018-04-01

Using density functional theory combined LSDA+U method, the structural, electronic and magnetic behaviors of ytterbium implanted in wurtzite AlN were investigated. Low formation energy shows that Yb atom favors to substitute for Al site and to confirm this stability, the adsorption energy has been calculated. It is found that Al0.9375Yb0.0625N possesses a semiconductor behavior. The magnetic moment 0.9891 μB per molecule principally comes from Yb ion with small contribution from the Al and N atoms. We predict that Yb ions order ferromagnetically in AlN. The hybridization between the f orbital of the Yb atom and the p orbital of the N atom is also observed. We see that AlN:Yb will be among the good candidates for spintronic applications.

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

Code of Federal Regulations, 2010 CFR

2010-07-01

... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false High-speed rail cars... TRANSPORTATION VEHICLES Other Vehicles and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to those using “maglev” or high speed...

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

Code of Federal Regulations, 2012 CFR

2012-07-01

... 36 Parks, Forests, and Public Property 3 2012-07-01 2012-07-01 false High-speed rail cars... TRANSPORTATION VEHICLES Other Vehicles and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to those using “maglev” or high speed...

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

Code of Federal Regulations, 2011 CFR

2011-07-01

... 36 Parks, Forests, and Public Property 3 2011-07-01 2011-07-01 false High-speed rail cars... TRANSPORTATION VEHICLES Other Vehicles and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to those using “maglev” or high speed...

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

Code of Federal Regulations, 2014 CFR

2014-07-01

... 36 Parks, Forests, and Public Property 3 2014-07-01 2014-07-01 false High-speed rail cars... TRANSPORTATION VEHICLES Other Vehicles and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to those using “maglev” or high speed...

Characterization of Behavioral, Neuropathological, Brain Metabolic and Key Molecular Changes in zQ175 Knock-In Mouse Model of Huntington's Disease.

PubMed

Peng, Qi; Wu, Bin; Jiang, Mali; Jin, Jing; Hou, Zhipeng; Zheng, Jennifer; Zhang, Jiangyang; Duan, Wenzhen

2016-01-01

Huntington's disease (HD) is caused by an expansion of the trinucleotide poly (CAG) tract located in exon 1 of the huntingtin (Htt) gene leading to progressive neurodegeneration in selected brain regions, and associated functional impairments in motor, cognitive, and psychiatric domains. Since the discovery of the gene mutation that causes the disease, mouse models have been developed by different strategies. Recently, a new model, the zQ175 knock-in (KI) line, was developed in an attempt to have the Htt gene in a context and causing a phenotype that more closely mimics HD in humans. The behavioral phenotype was characterized across the independent laboratories and important features reminiscent of human HD are observed in zQ175 mice. In the current study, we characterized the zQ175 model housed in an academic laboratory under reversed dark-light cycle, including motor function, in vivo longitudinal structural MRI imaging for brain volume, MRS for striatal metabolites, neuropathology, as well as a panel of key disease marker proteins in the striatum at different ages. Our results suggest that homozygous zQ175 mice exhibited significant brain atrophy before the motor deficits and brain metabolite changes. Altered striatal medium spiny neuronal marker, postsynaptic marker protein and complement component C1qC also characterized zQ175 mice. Our results confirmed that the zQ175 KI model is valuable in understanding of HD-like pathophysiology and evaluation of potential therapeutics. Our data also provide suggestions to select appropriate outcome measurements in preclinical studies using the zQ175 mice.

High-spin structure, K isomers, and state mixing in the neutron-rich isotopes 173Tm and 175Tm

NASA Astrophysics Data System (ADS)

Hughes, R. O.; Lane, G. J.; Dracoulis, G. D.; Byrne, A. P.; Nieminen, P. H.; Watanabe, H.; Carpenter, M. P.; Chowdhury, P.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Seweryniak, D.; Zhu, S.

2012-11-01

High-spin states in the odd-proton thulium isotopes 173Tm and 175Tm have been studied using deep-inelastic reactions and γ-ray spectroscopy. In 173Tm, the low-lying structure has been confirmed and numerous new states have been identified, including a three-quasiparticle Kπ= 19/2- isomer with a lifetime of τ=360(100) ns at 1906 keV and a five-quasiparticle Kπ=35/2- isomer with a lifetime of τ= 175(40) ns at 4048 keV. The Kπ=35/2- state is interpreted as a t-band configuration that shows anomalously fast decays. In 175Tm, the low-lying structure has been reevaluated, a candidate state for the 9/2-[514] orbital has been identified at 1175 keV, and the 7/2-[523] bandhead has been measured to have a lifetime of τ= 460(50) ns. Newly identified high-K structures in 175Tm include a Kπ=15/2- isomer with a lifetime of τ= 64(3) ns at 947 keV and a Kπ= 23/2+ isomer with a lifetime of τ= 30(20) μs at 1518 keV. The Kπ=15/2- isomer shows relatively enhanced decays to the 7/2-[523] band that can be explained by chance mixing with the 15/2- member of the 7/2- band. Multiquasiparticle calculations have been performed for 173Tm and 175Tm, the results of which compare well with the experimentally observed high-spin states.

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

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 15 2010-01-01 2010-01-01 false Domestic lamb industry adjustment assistance program... GUARANTEED LOANMAKING Business and Industry Loans § 4279.175 Domestic lamb industry adjustment assistance... National Office to fund loans to lamb processors for real estate purchases and improvements; working...

Effect of 1-(4-phenoxyphenoxypropyl)imidazole (KS-175) on larval growth in the silkworm Bombyx mori.

PubMed

Shiotsuki, T; Yukuhiro, F; Kiuchi, M; Kuwano, E

1999-12-01

1-(4-Phenoxyphenoxypropyl)imidazole (KS-175), which has two types of characteristic moieties of insect growth regulators (IGRs), the phenoxyphenoxyalkyl group of juvenile hormone analogs (JHAs) and imidazole of 1,5-disubstituted imidazole such as KK-42, was tested for its biological activity on the silkworm, Bombyx mori. Penultimate (4th) instar larvae topically treated with KS-175 did not molt for more than 20 days. This activity was different from that reported for any IGRs. After the treatment, ecdysteroid levels in the hemolymph did not increase and the cells of the prothoracic gland had shrunk. When the treated penultimate larvae were fed an artificial diet supplemented with 20 ppm of 20-hydroxyecdysone, the larvae molted to the ultimate (5th) instar with a timing similar to that of control larvae fed a diet with or without 20-hydroxyecdysone. These results suggest that topical application of KS-175 irreversibly damages ecdysone biosynthesis in the prothoracic glands.

New capacities and modifications for NASTRAN level 17.5 at DTNSRDC

NASA Technical Reports Server (NTRS)

Hurwitz, M. M.

1980-01-01

Since 1970 DTNSRDC has been modifying NASTRAN to suite various Navy requirements. These modifications include capabilities as well as user conveniences and error corrections. The new features added to NASTRAN Level 17.5 are described. The subject areas of the additions include magnetostatics, piezoelectricity, fluid structure interactions, isoparametric finite elements, and shock design for shipboard equipment.

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

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 1 2011-10-01 2011-10-01 false High-speed rail cars, monorails and systems. 38....175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including... for high-platform, level boarding and shall comply with § 38.111(a) of this part for each type of car...

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

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 1 2014-10-01 2014-10-01 false High-speed rail cars, monorails and systems. 38....175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including... for high-platform, level boarding and shall comply with § 38.111(a) of this part for each type of car...

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

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 1 2013-10-01 2013-10-01 false High-speed rail cars, monorails and systems. 38....175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including... for high-platform, level boarding and shall comply with § 38.111(a) of this part for each type of car...

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

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 1 2010-10-01 2010-10-01 false High-speed rail cars, monorails and systems. 38....175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including... for high-platform, level boarding and shall comply with § 38.111(a) of this part for each type of car...

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

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 1 2012-10-01 2012-10-01 false High-speed rail cars, monorails and systems. 38....175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including... for high-platform, level boarding and shall comply with § 38.111(a) of this part for each type of car...

Asparagine 175 of connexin32 is a critical residue for docking and forming functional heterotypic gap junction channels with connexin26.

PubMed

Nakagawa, So; Gong, Xiang-Qun; Maeda, Shoji; Dong, Yuhua; Misumi, Yuko; Tsukihara, Tomitake; Bai, Donglin

2011-06-03

The gap junction channel is formed by proper docking of two hemichannels. Depending on the connexin(s) in the hemichannels, homotypic and heterotypic gap junction channels can be formed. Previous studies suggest that the extracellular loop 2 (E2) is an important molecular domain for heterotypic compatibility. Based on the crystal structure of the Cx26 gap junction channel and homology models of heterotypic channels, we analyzed docking selectivity for several hemichannel pairs and found that the hydrogen bonds between E2 domains are conserved in a group of heterotypically compatible hemichannels, including Cx26 and Cx32 hemichannels. According to our model analysis, Cx32N175Y mutant destroys three hydrogen bonds in the E2-E2 interactions due to steric hindrance at the heterotypic docking interface, which makes it unlikely to dock with the Cx26 hemichannel properly. Our experimental data showed that Cx26-red fluorescent protein (RFP) and Cx32-GFP were able to traffic to cell-cell interfaces forming gap junction plaques and functional channels in transfected HeLa/N2A cells. However, Cx32N175Y-GFP exhibited mostly intracellular distribution and was occasionally observed in cell-cell junctions. Double patch clamp analysis demonstrated that Cx32N175Y did not form functional homotypic channels, and dye uptake assay indicated that Cx32N175Y could form hemichannels on the cell surface similar to wild-type Cx32. When Cx32N175Y-GFP- and Cx26-RFP-transfected cells were co-cultured, no colocalization was found at the cell-cell junctions between Cx32N175Y-GFP- and Cx26-RFP-expressing cells; also, no functional Cx32N175Y-GFP/Cx26-RFP heterotypic channels were identified. Both our modeling and experimental data suggest that Asn(175) of Cx32 is a critical residue for heterotypic docking and functional gap junction channel formation between the Cx32 and Cx26 hemichannels.

Time-Restricted Feeding Improves Circadian Dysfunction as well as Motor Symptoms in the Q175 Mouse Model of Huntington's Disease.

PubMed

Wang, Huei-Bin; Loh, Dawn H; Whittaker, Daniel S; Cutler, Tamara; Howland, David; Colwell, Christopher S

2018-01-01

Huntington's disease (HD) patients suffer from a progressive neurodegeneration that results in cognitive, psychiatric, cardiovascular, and motor dysfunction. Disturbances in sleep/wake cycles are common among HD patients with reports of delayed sleep onset, frequent bedtime awakenings, and fatigue during the day. The heterozygous Q175 mouse model of HD has been shown to phenocopy many HD core symptoms including circadian dysfunctions. Because circadian dysfunction manifests early in the disease in both patients and mouse models, we sought to determine if early intervention that improve circadian rhythmicity can benefit HD and delay disease progression. We determined the effects of time-restricted feeding (TRF) on the Q175 mouse model. At six months of age, the animals were divided into two groups: ad libitum (ad lib) and TRF. The TRF-treated Q175 mice were exposed to a 6-h feeding/18-h fasting regimen that was designed to be aligned with the middle of the time when mice are normally active. After three months of treatment (when mice reached the early disease stage), the TRF-treated Q175 mice showed improvements in their locomotor activity rhythm and sleep awakening time. Furthermore, we found improved heart rate variability (HRV), suggesting that their autonomic nervous system dysfunction was improved. Importantly, treated Q175 mice exhibited improved motor performance compared to untreated Q175 controls, and the motor improvements were correlated with improved circadian output. Finally, we found that the expression of several HD-relevant markers was restored to WT levels in the striatum of the treated mice using NanoString gene expression assays.

25 CFR 175.13 - Procedures for adjusting electric power rates to reflect changes in the cost of purchased power...

Code of Federal Regulations, 2010 CFR

2010-04-01

... changes in the cost of purchased power or energy. 175.13 Section 175.13 Indians BUREAU OF INDIAN AFFAIRS... purchased power or energy. Whenever the cost of purchased power or energy changes, the effect of the change... accordingly. Rate adjustments due to the change in cost of purchased power or energy shall become effective...

Single-phase and well-dispersed Cu1.75S nanocrystals by ambient pressure diethylene glycol solution synthesis

NASA Astrophysics Data System (ADS)

Zheng, Xuerong; Jin, Zhengguo; Liu, Hui; Wang, Yueqiu; Wang, Xin; Du, Haiyan

2013-02-01

Single-phase, well-dispersed Cu1.75S nanocrystals were synthesized by an ambient pressure, hydrazine hydrate and ethylenediamine co-assisted diethylene glycol based solution chemical process using copper chloride and thioacetamide as precursors at the temperature range from 180 to 210 °C. Influence of hydrazine hydrate and ethylenediamine adding amounts, synthetic temperature on crystal growth, size distribution and optical properties of the synthesized Cu1.75S nanocrystals were investigated by XRD, TEM, HRTEM, EDX and UV-vis measurements. The synthetic reaction at above 200 °C grew flaky-shaped nanocrystals with relatively narrow size distribution. The formation of single-phase Cu1.75S nanocrystals in the diethylene glycol based solution process might be involved in the presence of intermediate [Cu(en)n]1+ and [Cu(NH3)4]2+ complexes in reaction solution, providing a stable Cu(I) and Cu(II) valent-mixed precursor.

26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 26 Internal Revenue 3 2014-04-01 2014-04-01 false Definition of soil and water conservation... Corporations (continued) § 1.175-2 Definition of soil and water conservation expenditures. (a) Expenditures... for the purpose of soil or water conservation in respect of land used in farming, or for the...

26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of soil and water conservation... Corporations (continued) § 1.175-2 Definition of soil and water conservation expenditures. (a) Expenditures... for the purpose of soil or water conservation in respect of land used in farming, or for the...

26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Definition of soil and water conservation... Corporations (continued) § 1.175-2 Definition of soil and water conservation expenditures. (a) Expenditures... for the purpose of soil or water conservation in respect of land used in farming, or for the...

26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Definition of soil and water conservation... Corporations (continued) § 1.175-2 Definition of soil and water conservation expenditures. (a) Expenditures... for the purpose of soil or water conservation in respect of land used in farming, or for the...

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

2010-04-01

... adjustments due to changes in the cost of purchased power or energy. 175.12 Section 175.12 Indians BUREAU OF... adjustments due to changes in the cost of purchased power or energy. Except for adjustments to rates due to changes in the cost of purchased power or energy, the Area Director shall adjust electric power rates...

The systematic regulation of oyster CgIL17-1 and CgIL17-5 in response to air exposure.

PubMed

Xin, Lusheng; Zhang, Huan; Du, Xinyu; Li, Yiqun; Li, Meijia; Wang, Lingling; Wang, Hao; Qiu, Limei; Song, Linsheng

2016-10-01

As a proinflammatory cytokine, vertebrate interleukin 17 (IL17) plays a vital role in the balance of inflammation and homeostasis, and is involved in a systemic regulation of glucose homeostasis. In the present study, a remarkable increase of glucose concentration was observed in oyster serum after 2 d air exposure, which was followed by a rapid up-regulation of CgIL17-1 and CgIL17-5. After oysters was received an injection of extra glucose, the mRNA expressions of CgIL17-1 and CgIL17-5 were also significantly up-regulated. The histopathological changes of hepatopancreas were observed after the oysters were treated by the recombinant proteins of CgIL17-1 and CgIL17-5 in vivo or subjected to air exposure. A significant decrease of GSK3β (Glycogen synthase kinase-3β) protein was also observed after the injection of CgIL17-1 and CgIL17-5 recombinant proteins in vivo. When the oysters with CgIL17-1 and CgIL17-5 genes knocked down were subjected to air exposure, the decline of GSK3β concentration was slowed down and it could still be obviously detected after 7 d compared with that in the control. Meanwhile, the expression of CgDefensin and CgDFFA was inhibited, while CgIAP was up-regulated when CgIL17-1 and CgIL17-5 genes were knocked down, and the oysters exhibited higher mortality (p < 0.05) at 3 d, whereas lower at the late stage of air exposure compared with that in the controls. The results collectively suggested that once oysters were exposed to air, the synthesis of proinflammatory cytokines CgIL17-1 and CgIL17-5 was induced by the up-regulated glucose concentration in oyster serum, which would be not only a negative feedback to the high glucose concentration through mediating the regulation of GSK3β, but also an inducer on tissue damage and immunocompetence as well as the adaptability to stresses. Copyright © 2016 Elsevier Ltd. All rights reserved.

Lecithin retinol acyltransferase and its S175R mutant have a similar secondary structure content and maximum insertion pressure but different enzyme activities.

PubMed

Bussières, Sylvain; Cantin, Line; Salesse, Christian

2011-11-01

Recent work on Lecithin:retinol acyltransferase (LRAT) allowed to gather a large amount of information on its secondary structure, enzymatic properties and membrane binding. A truncated form of LRAT (tLRAT) as well as its S175R mutant leading to retinis pigmentosa, a severe form of retinal dystrophy, were studied to understand the role of this mutation on the dysfunction of this protein. Consistently with previous reports, the S175R-tLRAT mutant was shown to lack enzyme activity. However, very similar secondary structures probed by circular dichroism have been obtained with the S175R-tLRAT mutant and tLRAT. Moreover, similar values of maximum insertion pressure of the S175R-tLRAT mutant and tLRAT have been obtained using Langmuir monolayers, thus suggesting that the S175R mutation has no effect on the membrane binding properties of tLRAT. These findings leave open the possibility that the loss of enzymatic activity associated with the S175R mutant is related to loss of an essential nucleophile near the active site, or alternatively, to steric obstruction of the active site that impedes substrate binding. Copyright © 2011 Elsevier Ltd. All rights reserved.

Military Medicine. Volume 175, August 2010, Supplement. Total Force Fitness for the 21st Century A New Paradigm

DTIC Science & Technology

2010-08-01

MEDICINE, Vol. 175, August Supplement 2010 1 MILITARY MEDICINE, 175, 8:1, 2010 “Fitness” is a commonly used word in our society today but within the...1) prevent overtraining; (2) perform multiaxial, neuromuscu- lar, proprioceptive, and agility training; (3) wear mouth guards during high-risk...additional risk factors. Service members are given counsel on smoking sensation, custom mouth guards are offered by dental services, and synthetic blend

26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Definition of soil and water conservation... (continued) § 1.175-2 Definition of soil and water conservation expenditures. (a) Expenditures treated as a... of soil or water conservation in respect of land used in farming, or for the prevention of erosion of...

Bioinspired Orientation of β-Substituents on Porphyrin Antenna Ligands Switches Ytterbium(III) NIR Emission with Thermosensitivity.

PubMed

Ning, Yingying; Ke, Xian-Sheng; Hu, Ji-Yun; Liu, Yi-Wei; Ma, Fang; Sun, Hao-Ling; Zhang, Jun-Long

2017-02-20

"Configurational isomerism" is an important approach found in naturally occurring chlorophylls to modulate light harvesting function without significant structural changes; however, this feature has been seldom applied in design of antenna ligands for lanthanide (Ln) sensitization. In this work, we introduced a bioinspired approach by orientation of β-dilactone moieties on porphyrinates, namely cis-/trans-porphodilactones, to modulate the energy transfer process from the lowest triplet excited state of the ligand (T 1 ) to the emitting level of ytterbium(III) ( 2 F 5/2 , Yb*). Interestingly, near-infrared (NIR) emission of Yb(III) could be switched "on" by the cis-porphodilactone ligand, while the trans-isomer renders Yb(III) emission "off" and the ratio of quantum yields is ∼8. Analysis of the structure-photophysical properties relationship suggests that the significant emission difference is correlated to the energy gaps between T 1 and Yb* (1152 cm -1 in the cis- vs -25 cm -1 in the trans-isomer). More interestingly, due to back energy transfer (BEnT), the Yb(III) complex of cis-porphodilactone exhibits NIR emission with high thermosensitivity (4.0%°C -1 in solution and 4.9%°C -1 in solid state), comparable to previously reported terbium (Tb) and europium (Eu) visible emitters, in contrast to the trivial emission changes of the trans-isomer and porphyrin and porpholactone analogues. This work opens up new access to design NIR emissive Ln complexes by bioinspired modification of antenna ligands.

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 ...

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

Code of Federal Regulations, 2013 CFR

2013-07-01

... 36 Parks, Forests, and Public Property 3 2013-07-01 2012-07-01 true High-speed rail cars... TRANSPORTATION VEHICLES Other Vehicles and Systems § 1192.175 High-speed rail cars, monorails and systems. (a) All cars for high-speed rail systems, including but not limited to those using “maglev” or high speed...

49 CFR 175.25 - Notification at air passenger facilities of hazardous materials restrictions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Notification at air passenger facilities of... MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.25 Notification at air passenger facilities of hazardous materials restrictions. Each person who engages in for-hire air...

Short and Medium-Range Order in Liquid Ternary Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 Alloys

NASA Astrophysics Data System (ADS)

Roik, Oleksandr S.; Samsonnikov, Oleksiy; Kazimirov, Volodymyr; Sokolskii, Volodymyr

2010-01-01

A local short-to-intermediate range order of liquid Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 alloys was examined by X-ray diffraction and the reverse Monte Carlo modelling. The comprehensive analysis of three-dimensional models of the liquid ternary alloys was performed by means of the Voronoi-Delaunay method. The existence of a prepeak on the S(Q) function of the liquid alloys is caused by medium range ordering of 3d-transition metal atoms in dense-packed polytetrahedral clusters at temperatures close to the liquidus. The non-crystalline clusters, represented by aggregates of pentagons that consist of good tetrahedra, and chemical short-range order lead to the formation of the medium range order in the liquid binary Al-Ni, Al-Co and ternary Al-Ni-Co alloys.

Deciphering the Resistome of the Widespread Pseudomonas aeruginosa Sequence Type 175 International High-Risk Clone through Whole-Genome Sequencing

PubMed Central

López-Causapé, Carla; Ocampo-Sosa, Alain A.; Sommer, Lea M.; Domínguez, María Ángeles; Zamorano, Laura; Juan, Carlos; Tubau, Fe; Rodríguez, Cristina; Moyà, Bartolomé; Martínez-Martínez, Luis; Plesiat, Patrick

2016-01-01

Whole-genome sequencing (WGS) was used for the characterization of the frequently extensively drug resistant (XDR) Pseudomonas aeruginosa sequence type 175 (ST175) high-risk clone. A total of 18 ST175 isolates recovered from 8 different Spanish hospitals were analyzed; 4 isolates from 4 different French hospitals were included for comparison. The typical resistance profile of ST175 included penicillins, cephalosporins, monobactams, carbapenems, aminoglycosides, and fluoroquinolones. In the phylogenetic analysis, the four French isolates clustered together with two isolates from one of the Spanish regions. Sequence variation was analyzed for 146 chromosomal genes related to antimicrobial resistance, and horizontally acquired genes were explored using online databases. The resistome of ST175 was determined mainly by mutational events; resistance traits common to all or nearly all of the strains included specific ampR mutations leading to ampC overexpression, specific mutations in oprD conferring carbapenem resistance, or a mexZ mutation leading to MexXY overexpression. All isolates additionally harbored an aadB gene conferring gentamicin and tobramycin resistance. Several other resistance traits were specific to certain geographic areas, such as a streptomycin resistance gene, aadA13, detected in all four isolates from France and in the two isolates from the Cantabria region and a glpT mutation conferring fosfomycin resistance, detected in all but these six isolates. Finally, several unique resistance mutations were detected in single isolates; particularly interesting were those in genes encoding penicillin-binding proteins (PBP1A, PBP3, and PBP4). Thus, these results provide information valuable for understanding the genetic basis of resistance and the dynamics of the dissemination and evolution of high-risk clones. PMID:27736752

Demonstration of optical parametric gain generation in the 1 μm regime based on a photonic crystal fiber pumped by a picosecond mode-locked ytterbium-doped fiber laser

NASA Astrophysics Data System (ADS)

Zhang, Lei; Yang, Si-Gang; Wang, Xiao-Jian; Gou, Dou-Dou; Chen, Hong-Wei; Chen, Ming-Hua; Xie, Shi-Zhong

2014-01-01

We report the experimental demonstration of the optical parametric gain generation in the 1 μm regime based on a photonic crystal fiber (PCF) with a zero group velocity dispersion (GVD) wavelength of 1062 nm pumped by a homemade tunable picosecond mode-locked ytterbium-doped fiber laser. A broad parametric gain band is obtained by pumping the PCF in the anomalous GVD regime with a relatively low power. Two separated narrow parametric gain bands are observed by pumping the PCF in the normal GVD regime. The peak of the parametric gain profile can be tuned from 927 to 1038 nm and from 1099 to 1228 nm. This widely tunable parametric gain band can be used for a broad band optical parametric amplifier, large span wavelength conversion or a tunable optical parametric oscillator.

25 CFR 1000.175 - What is the process for conducting the negotiation phase?

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 2 2011-04-01 2011-04-01 false What is the process for conducting the negotiation phase...-DETERMINATION AND EDUCATION ACT Negotiation Process for Annual Funding Agreements Negotiation of Initial Annual Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30 days...

25 CFR 1000.175 - What is the process for conducting the negotiation phase?

Code of Federal Regulations, 2013 CFR

2013-04-01

... 25 Indians 2 2013-04-01 2013-04-01 false What is the process for conducting the negotiation phase...-DETERMINATION AND EDUCATION ACT Negotiation Process for Annual Funding Agreements Negotiation of Initial Annual Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30 days...

25 CFR 1000.175 - What is the process for conducting the negotiation phase?

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false What is the process for conducting the negotiation phase...-DETERMINATION AND EDUCATION ACT Negotiation Process for Annual Funding Agreements Negotiation of Initial Annual Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30 days...

25 CFR 1000.175 - What is the process for conducting the negotiation phase?

Code of Federal Regulations, 2012 CFR

2012-04-01

... 25 Indians 2 2012-04-01 2012-04-01 false What is the process for conducting the negotiation phase...-DETERMINATION AND EDUCATION ACT Negotiation Process for Annual Funding Agreements Negotiation of Initial Annual Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30 days...

25 CFR 1000.175 - What is the process for conducting the negotiation phase?

Code of Federal Regulations, 2014 CFR

2014-04-01

... 25 Indians 2 2014-04-01 2014-04-01 false What is the process for conducting the negotiation phase...-DETERMINATION AND EDUCATION ACT Negotiation Process for Annual Funding Agreements Negotiation of Initial Annual Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30 days...

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

Code of Federal Regulations, 2011 CFR

2011-01-01

... CONSERVATION ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT Provisions for Commercial Heating, Ventilating, Air-Conditioning and Water Heating Products § 431.175 Additional... manufacturer that is not a VICP participant with respect to a particular type of commercial HVAC and WH product...

Deciphering the Resistome of the Widespread Pseudomonas aeruginosa Sequence Type 175 International High-Risk Clone through Whole-Genome Sequencing.

PubMed

Cabot, Gabriel; López-Causapé, Carla; Ocampo-Sosa, Alain A; Sommer, Lea M; Domínguez, María Ángeles; Zamorano, Laura; Juan, Carlos; Tubau, Fe; Rodríguez, Cristina; Moyà, Bartolomé; Peña, Carmen; Martínez-Martínez, Luis; Plesiat, Patrick; Oliver, Antonio

2016-12-01

Whole-genome sequencing (WGS) was used for the characterization of the frequently extensively drug resistant (XDR) Pseudomonas aeruginosa sequence type 175 (ST175) high-risk clone. A total of 18 ST175 isolates recovered from 8 different Spanish hospitals were analyzed; 4 isolates from 4 different French hospitals were included for comparison. The typical resistance profile of ST175 included penicillins, cephalosporins, monobactams, carbapenems, aminoglycosides, and fluoroquinolones. In the phylogenetic analysis, the four French isolates clustered together with two isolates from one of the Spanish regions. Sequence variation was analyzed for 146 chromosomal genes related to antimicrobial resistance, and horizontally acquired genes were explored using online databases. The resistome of ST175 was determined mainly by mutational events; resistance traits common to all or nearly all of the strains included specific ampR mutations leading to ampC overexpression, specific mutations in oprD conferring carbapenem resistance, or a mexZ mutation leading to MexXY overexpression. All isolates additionally harbored an aadB gene conferring gentamicin and tobramycin resistance. Several other resistance traits were specific to certain geographic areas, such as a streptomycin resistance gene, aadA13, detected in all four isolates from France and in the two isolates from the Cantabria region and a glpT mutation conferring fosfomycin resistance, detected in all but these six isolates. Finally, several unique resistance mutations were detected in single isolates; particularly interesting were those in genes encoding penicillin-binding proteins (PBP1A, PBP3, and PBP4). Thus, these results provide information valuable for understanding the genetic basis of resistance and the dynamics of the dissemination and evolution of high-risk clones. Copyright © 2016, American Society for Microbiology. All Rights Reserved.

The National Kidney Registry: 175 transplants in one year.

PubMed

Veale, Jeffrey; Hil, Garet

2011-01-01

Since organizing its first swap in 2008, the National Kidney Registry had facilitated 389 kidney transplants by the end of 2011 across 45 U.S. transplant centers. Rapid innovations, advanced computer technologies, and an evolving understanding of the processes at participating transplant centers and histocompatibility laboratories are among the factors driving the success of the NKR. Virtual cross match accuracy has improved from 43% to 94% as a result of improvements in the HLA typing process for donor antigens and enhanced mechanisms to list unacceptable HLA antigens for sensitized patients. By the end of 2011, the NKR had transplanted 66% of the patients enrolled since 2008. The 2011 wait time (from enrollment to transplant) for the 175 patients transplanted that year averaged 5 months.

Yb3+-doped cadmium molybdato-tungstate single crystal - Its structural, optical, magnetic and transport properties

NASA Astrophysics Data System (ADS)

Groń, T.; Tomaszewicz, E.; Berkowski, M.; Głowacki, M.; Oboz, M.; Kusz, J.; Sawicki, B.; Kukuła, Z.; Duda, H.

2018-06-01

Single crystal of new cadmium and ytterbium molybdato-tungstate (Cd0.9706⎕0.0098Yb0.0196(MoO4)0.9706(WO4)0.0294, where ⎕ denotes cationic vacancies) has been successfully grown by the Czochralski method in air and under 1 MPa. X-ray crystallographic analysis reveals that the as-grown single crystal belongs to a scheelite-type structure (a = b = 5.15539(12) and c = 11.1919(3) Å, space group I41/a), in which Yb3+ ions do not show long-range order and are randomly distributed in the unit cell, substituting the Cd2+ ones. The as-grown single crystal does not show anisotropy of optical properties, i.e. its direct band gap reaches Eg = 1.76 or 1.75 eV along (100) and (001) crystallographic directions, respectively. The single crystal exhibits paramagnetic state with short-range antiferromagnetic and long-range ferrimagnetic interactions, a magnetization with zero coercivity and, a remanence that is almost a universal function of H/T, characterizing superparamagnetic-like behaviour. Electrical studies of the new ytterbium-doped cadmium molybdato-tungstate single crystal show a relatively small dielectric constant (εr<12), large lossiness of Joule-Lenz type observed at low frequencies as well as nonlinear I-V characteristics of Schottky or Maxwell-Wagner type.

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Gujarat

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Andhra Pradesh is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Rajasthan

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Andhra Pradesh is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Karnataka

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Andhra Pradesh is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Maharashtra

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Andhra Pradesh is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less

33 CFR 165.T13-175 - Safety Zone; M/V DAVY CROCKETT, Columbia River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Safety Zone; M/V DAVY CROCKETT....T13-175 Safety Zone; M/V DAVY CROCKETT, Columbia River. (a) Location: The following area is a safety zone: (1) All waters of the Columbia River encompassed within the following four points: point one at...

Differentiation of EL4 lymphoma cells by tumoral environment is associated with inappropriate expression of the large chondroitin sulfate proteoglycan PG-M and the tumor-associated antigen HTgp-175.

PubMed

Rottiers, P; Verfaillie, T; Contreras, R; Revets, H; Desmedt, M; Dooms, H; Fiers, W; Grooten, J

1998-11-09

Progression to malignancy of transformed cells involves complex genetic alterations and aberrant gene expression patterns. While aberrant gene expression is often caused by alterations in individual genes, the contribution of the tumoral environment to the triggering of this gene expression is less well established. The stable but heterogeneous expression in cultured EL4/13 cells of a novel tumor-associated antigen, designated as HTgp-175, was chosen for the investigation of gene expression during tumor formation. Homogeneously HTgp-175-negative EL4/13 cells, isolated by cell sorting or obtained by subcloning, acquired HTgp-175 expression as a result of tumor formation. The tumorigenicity of HTgp-175-negative vs. HTgp-175-positive EL4 variants was identical, indicating that induction but not selection accounted for the phenotypic switch from HTgp-175-negative to HTgp-175-positive. Although mutagenesis experiments showed that the protein was not essential for tumor establishment, tumor-derived cells showed increased malignancy, linking HTgp-175 expression with genetic changes accompanying tumor progression. This novel gene expression was not an isolated event, since it was accompanied by ectopic expression of the large chondroitin sulfate proteoglycan PG-M and of normal differentiation antigens. We conclude that signals derived from the tumoral microenvironment contribute significantly to the aberrant gene expression pattern of malignant cells, apparently by fortuitous activation of differentiation processes and cause expression of novel differentiation antigens as well as of inappropriate tumor-associated and ectopic antigens.

MiR-17-5p impairs trafficking of H-ERG K+ channel protein by targeting multiple er stress-related chaperones during chronic oxidative stress.

PubMed

Wang, Qi; Hu, Weina; Lei, Mingming; Wang, Yong; Yan, Bing; Liu, Jun; Zhang, Ren; Jin, Yuanzhe

2013-01-01

To investigate if microRNAs (miRNAs) play a role in regulating h-ERG trafficking in the setting of chronic oxidative stress as a common deleterious factor for many cardiac disorders. We treated neonatal rat ventricular myocytes and HEK293 cells with stable expression of h-ERG with H2O2 for 12 h and 48 h. Expression of miR-17-5p seed miRNAs was quantified by real-time RT-PCR. Protein levels of chaperones and h-ERG trafficking were measured by Western blot analysis. Luciferase reporter gene assay was used to study miRNA and target interactions. Whole-cell patch-clamp techniques were employed to record h-ERG K(+) current. H-ERG trafficking was impaired by H2O2 after 48 h treatment, accompanied by reciprocal changes of expression between miR-17-5p seed miRNAs and several chaperones (Hsp70, Hsc70, CANX, and Golga2), with the former upregulated and the latter downregulated. We established these chaperones as targets for miR-17-5p. Application miR-17-5p inhibitor rescued H2O2-induced impairment of h-ERG trafficking. Upregulation of endogenous by H2O2 or forced miR-17-5p expression either reduced h-ERG current. Sequestration of AP1 by its decoy molecule eliminated the upregulation of miR-17-5p, and ameliorated impairment of h-ERG trafficking. Collectively, deregulation of the miR-17-5p seed family miRNAs can cause severe impairment of h-ERG trafficking through targeting multiple ER stress-related chaperones, and activation of AP1 likely accounts for the deleterious upregulation of these miRNAs, in the setting of prolonged duration of oxidative stress. These findings revealed the role of miRNAs in h-ERG trafficking, which may contribute to the cardiac electrical disturbances associated with oxidative stress.

Crystal structure refinement of ReSi1.75 with an ordered arrangement of silicon vacancies

NASA Astrophysics Data System (ADS)

Harada, Shunta; Hoshikawa, Hiroaki; Kuwabara, Kosuke; Tanaka, Katsushi; Okunishi, Eiji; Inui, Haruyuki

2011-08-01

The crystal structure and microstructure of ReSi1.75 were investigated by synchrotron X-ray diffraction combined with scanning transmission electron microscopy. ReSi1.75 contains an ordered arrangement of vacancies in Si sites in the underlying tetragonal C11b lattice of the MoSi2-type and the crystal structure is monoclinic with the space group Cm. Atomic positions of Si atoms near vacancies are considerably displaced from the corresponding positions in the parent C11b structure, and they exhibit anomalously large local thermal vibration accompanied by large values of atomic displacement parameter. There are four differently-oriented domains with two of them being related to each other by the 90° rotation about the c-axis of the underlying C11b lattice and the other two being their respective twins. The habit planes for domain boundaries observed experimentally are consistent with those predicted with ferroelastic theory.

Synthesis and electrochemical assessment of Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} ceramics and derived composite electrolytes

DOE Office of Scientific and Technical Information (OSTI.GOV)

Martins, Natércia C.T.; Rajesh, Surendran; Marques, Fernando M.B.

2015-10-15

Highlights: • Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} prepared for the first time through solid state reaction. • High energy milling needed to assist the ceramic route. • Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} is oxide-ion conductor in air and n-type conductor at low pO{sub 2}. • Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} decomposes slightly when exposed to alkaline carbonates. • Composites based on Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} show standard electrical performance. - Abstract: Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} was prepared for the first time through high temperature (1600 °C for 5 h) solid state reaction, after high energy milling to enhance the mechano-chemical interaction of precursormore » oxides (CeO{sub 2} and Yb{sub 2}O{sub 3}). Single phase formation was confirmed by powder X-ray diffraction. Impedance spectroscopy data obtained under wide temperature (300–800 °C) and oxygen partial pressure (0.21 to about 10{sup −25} atm) ranges indicates that this material exhibits predominant oxide-ion conductivity under oxidizing conditions while n-type electronic conductivity prevails at low oxygen partial pressure. The mixed oxide shows modest ionic conductivity (1.1 × 10{sup −3} S cm{sup −1} at 800 °C) with activation energy of 1.3 eV in the 600–800 °C temperature range. When combined with molten carbonates (Li{sub 2}CO{sub 3} + Na{sub 2}CO{sub 3}, 1:1 molar ratio) to produce composite electrolytes, Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} slightly decomposed. However, the composite electrical performance is still acceptable and closely matches the conductivity of similar materials (>0.1 S cm{sup −1} immediately above 500 °C)« less

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

2010-07-27

...-0241; Airspace Docket No. 10-AGL-4] RIN 2120-AA66 Modification of VOR Federal Airways V-82, V-175, V-191, and V-430 in the Vicinity of Bemidji, MN AGENCY: Federal Aviation Administration (FAA), DOT...) Federal Airways V-82, V-175, V-191, and V- 430 in the vicinity of Bemidji, MN. The Bemidji (BJI) VOR, that...

Solid oxide membrane (SOM) process for ytterbium and silicon production from their oxides

NASA Astrophysics Data System (ADS)

Jiang, Yihong

The Solid oxide membrane (SOM) electrolysis is an innovative green technology that produces technologically important metals directly from their respective oxides. A yttria-stabilized zirconia (YSZ) tube, closed at one end is employed to separate the molten salt containing dissolved metal oxides from the anode inside the YSZ tube. When the applied electric potential between the cathode in the molten salt and the anode exceeds the dissociation potential of the desired metal oxides, oxygen ions in the molten salt migrate through the YSZ membrane and are oxidized at the anode while the dissolved metal cations in the flux are reduced to the desired metal at the cathode. Compared with existing metal production processes, the SOM process has many advantages such as one unit operation, less energy consumption, lower capital costs and zero carbon emission. Successful implementation of the SOM electrolysis process would provide a way to mitigate the negative environmental impact of the metal industry. Successful demonstration of producing ytterbium (Yb) and silicon (Si) directly from their respective oxides utilizing the SOM electrolysis process is presented in this dissertation. During the SOM electrolysis process, Yb2O3 was reduced to Yb metal on an inert cathode. The melting point of the supporting electrolyte (LiF-YbF3-Yb2O3) was determined by differential thermal analysis (DTA). Static stability testing confirmed that the YSZ tube was stable with the flux at operating temperature. Yb metal deposit on the cathode was confirmed by scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). During the SOM electrolysis process for silicon production, a fluoride based flux based on BaF2, MgF2, and YF3 was engineered to serve as the liquid electrolyte for dissolving silicon dioxide. YSZ tube was used to separate the molten salt from an anode current collector in the liquid silver. Liquid tin was chosen as cathode to dissolve the reduced silicon during

Repression of miR-17-5p with elevated expression of E2F-1 and c-MYC in non-metastatic hepatocellular carcinoma and enhancement of cell growth upon reversing this expression pattern

DOE Office of Scientific and Technical Information (OSTI.GOV)

El Tayebi, H.M.; Omar, K.; Hegy, S.

2013-05-10

Highlights: •The oncogenic miR-17-5p is downregulated in non-metastatic hepatocellular carcinoma patients. •E2F-1 and c-MYC transcripts are upregulated in non-metastatic HCC patients. •miR-17-5p forced overexpression inhibited E2F-1 and c-MYC expression in HuH-7 cells. •miR-17-5p mimicking increased HuH-7 cell growth, proliferation, migration and colony formation. •miR-17-5p is responsible for HCC progression among the c-MYC/E2F-1/miR-17-5p triad members. -- Abstract: E2F-1, c-MYC, and miR-17-5p is a triad of two regulatory loops: a negative and a positive loop, where c-MYC induces the expression of E2F-1 that induces the expression of miR-17-5p which in turn reverses the expression of E2F-1 to close the loop. In thismore » study, we investigated this triad for the first time in hepatocellular carcinoma (HCC), where miR-17-5p showed a significant down-regulation in 23 non-metastatic HCC biopsies compared to 10 healthy tissues; however, E2F-1 and c-MYC transcripts were markedly elevated. Forced over-expression of miR-17-5p in HuH-7 cells resulted in enhanced cell proliferation, growth, migration and clonogenicity with concomitant inhibition of E2F-1 and c-MYC transcripts expressions, while antagomirs of miR-17-5p reversed these events. In conclusion, this study revealed a unique pattern of expression for miR-17-5p in non-metastatic HCC patients in contrast to metastatic HCC patients. In addition we show that miR-17-5p is the key player among the triad that tumor growth and spread.« less

Ultra-wideband microwave photonic phase shifter with a 360° tunable phase shift based on an erbium-ytterbium co-doped linearly chirped FBG.

PubMed

Liu, Weilin; Yao, Jianping

2014-02-15

A simple photonic approach to implementing an ultra-wideband microwave phase shifter based on an erbium-ytterbium (Er/Yb) co-doped linearly chirped fiber Bragg grating (LCFBG) is proposed and experimentally demonstrated. The LCFBG is designed to have a constant magnitude response over a reflection band, and a phase response that is linear and nonlinear in two sections in the reflection band. When an optical single-sideband with carrier (OSSB+C) signal is sent to the LCFBG, by locating the optical carrier at the section corresponding to the nonlinear phase response and the sideband at the section corresponding to the linear phase response, a phase shift is introduced to the optical carrier, which is then translated to the microwave signal by beating the optical carrier and the sideband at a photodetector. The tuning of the phase shift is realized by optically pumping the Er/Yb co-doped LCFBG by a 980-nm laser diode. The proposed ultra-wideband microwave photonic phase shifter is experimentally demonstrated. A phase shifter with a full 360° phase shift with a bandwidth from 10 to 40 GHz is experimentally demonstrated.

Measurement of the isotope shift of the 63 P 1 ↔53 D 1 transition of ytterbium by using a diode oscillator fiber amplified laser

NASA Astrophysics Data System (ADS)

Lee, L.; Park, H.; Ko, K.-H.; Jeong, D.-Y.

2010-08-01

We demonstrated a Diode Oscillator Fiber Amplification (DOFA) system in order to study the 63 P 1 ↔53 D 1 (1539 nm) transition line of a neutral ytterbium atom that is accessed by the stepwise excitation of the ground state. The frequency of the DOFA system was doubled by a MgO:PPLN crystal for the resonant excitation of the 61 S 0 ↔63 P 1 transition. The frequency of the second harmonic beam was stabilized to the 61 S 0 ↔63 P 1 transition of each isotope with the stability of about 2 MHz. We performed absorption spectroscopy on the 63 P 1 ↔53 D 1 (1539 nm) transition after the velocity selective excitation by the frequency-doubled beam. The isotope shifts in the 63 P 1 ↔53 D 1 (1539 nm) transition were directly measured for the first time. The relative isotope shifts from 174Yb were measured as -105.8 MHz and 109.7 MHz for 176Yb and 172Yb, respectively.

A Prospective, Open-Label, Observational, Postmarket Study Evaluating VYC-17.5L for the Correction of Moderate to Severe Nasolabial Folds Over 12 Months

PubMed Central

Sattler, Gerhard; Philipp-Dormston, Wolfgang G.; Van Den Elzen, Helga; Van Der Walt, Cornelius; Nathan, Myooran; Kerson, Graeme; Dhillon, Benjeev

2017-01-01

BACKGROUND VYC-17.5L (17.5 mg/mL hyaluronic acid, 0.3% lidocaine) is a dermal filler intended for deep dermis injection for the treatment of skin depressions. OBJECTIVE To evaluate 12-month effectiveness and safety of VYC-17.5L for the treatment of moderate/severe nasolabial folds (NLFs). METHODS Subjects ≥18 years old with moderate/severe NLFs were recruited (N = 70). Injected volume was aimed at achieving optimum correction; top-up treatment was given at 2 weeks if needed. The primary endpoint was investigator-assessed change in NLF severity over 12 months using the validated photonumeric NLF Severity Scale. Secondary endpoints included investigator- and subject-assessed satisfaction and safety. Adverse events judged to be more severe or prolonged than routinely observed were recorded. RESULTS Sixty-five subjects completed study requirements. Mean volume injected was 3.0 ± 1.0 mL for both NLFs combined. Significant improvement was maintained in investigator-assessed NLF severity at 12 months, and investigators and subjects reported high satisfaction with VYC-17.5L throughout the study. Two unexpected adverse events were reported: (1) redness, swelling, and decreased sensitivity (resolved after 4 days) and (2) swelling (resolved after 48 hours); neither event was serious or life threatening. CONCLUSION VYC-17.5L is effective and well tolerated for the treatment of moderate to severe NLFs for 1 year. PMID:28165349

Non-surgical approach to advanced chronic periodontitis: a 17.5-year case report.

PubMed

Kawamura, M; Sadamori, S; Okada, M; Sasahara, H; Hamada, T

2004-03-01

This 17.5-year longitudinal case report details the treatment of advanced chronic periodontitis in a female patient commencing at 34 years of age. The woman was provided with periodontal care comprising of temporary fixation, scaling and root planing, intra-pocket irrigation using a root canal syringe and regular supervised maintenance. The patient presented with a 10-year history of bleeding gums. Therapy conducted in general practice had included simple curettage and irrigation. However, these treatments proved unsuccessful and the patient often changed dentists seeking better treatment. She presented to the University Dental Hospital, for diagnosis and treatment of her periodontal conditions after her mandibular lateral incisor had exfoliated. On presentation a purulent exudate could be expressed from all of the pockets. All anterior teeth, excluding the maxillary canines, demonstrated +2 to +3 mobility. The patient did not want any surgical treatment or her teeth extracted. It was decided to treat the patient conservatively without surgery. By postponing extraction, the authors were in a better position to determine the prognosis of the remaining teeth after the infection was under control. Although six teeth were extracted during the 17.5 years, this case report suggests that a non-surgical approach is a viable option while maintaining regular visits for periodontal care.

42 CFR 137.175 - Is a Self-Governance Tribe required to maintain a recordkeeping system?

Code of Federal Regulations, 2010 CFR

2010-10-01

... 42 Public Health 1 2010-10-01 2010-10-01 false Is a Self-Governance Tribe required to maintain a... HUMAN SERVICES INDIAN HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES TRIBAL SELF-GOVERNANCE Operational Provisions Records § 137.175 Is a Self-Governance Tribe required to maintain a recordkeeping...

miR-148a and miR-17-5p synergistically regulate milk TAG synthesis via PPARGC1A and PPARA in goat mammary epithelial cells.

PubMed

Chen, Zhi; Luo, Jun; Sun, Shuang; Cao, Duoyao; Shi, Huaiping; Loor, Juan J

2017-03-04

MicroRNA (miRNA) are a class of '18-25' nt RNA molecules which regulate gene expression and play an important role in several biologic processes including fatty acid metabolism. Here we used S-Poly (T) and high-throughput sequencing to evaluate the expression of miRNA and mRNA during early-lactation and in the non-lactating ("dry") period in goat mammary gland tissue. Results indicated that miR-148a, miR-17-5p, PPARGC1A and PPARA are highly expressed in the goat mammary gland in early-lactation and non-lactating periods. Utilizing a Luciferase reporter assay and Western Blot, PPARA, an important regulator of fatty acid oxidation, and PGC1a (PPARGC1A), a major regulator of fat metabolism, were demonstrated to be targets of miR-148a and miR-17-5p in goat mammary epithelial cells (GMECs). It was also revealed that miR-148a expression can regulate PPARA, and miR-17-5p represses PPARGC1A in GMECs. Furthermore, the overexpression of miR-148a and miR-17-5p promoted triacylglycerol (TAG) synthesis while the knockdown of miR-148a and miR-17-5p impaired TAG synthesis in GMEC. These findings underscore the importance of miR-148a and miR-17-5p as key components in the regulation of TAG synthesis. In addition, miR-148a cooperates with miR-17-5p to regulate fatty acid metabolism by repressing PPARGC1A and PPARA in GMECs. Further studies on the functional role of miRNAs in lipid metabolism of ruminant mammary cells seem warranted.

Design and evaluation of a 63 element 1.75-dimensional ultrasound phased array for treating benign prostatic hyperplasia

NASA Astrophysics Data System (ADS)

Saleh, Khaldon Y.; Smith, Nadine B.

2003-10-01

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.

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Tamil Nadu

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Tamil Nadu is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less

Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Regional Study: Andhra Pradesh

DOE Office of Scientific and Technical Information (OSTI.GOV)

Cochran, Jaquelin M; Palchak, Joseph D; Ehlen, Annaliese K

This chapter on Andhra Pradesh is one of six state chapters included in Appendix C of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study). The objective of the state chapters is to provide modeling assumptions, results, and next steps to use and improve the model specific to each state. The model has inherent uncertainties, particularly in how the intrastate transmission network and RE generation projects will develop (e.g., locations, capacities). The model also does not include information on contracts or must-run status of particular plantsmore » for reliability purposes. By providing details on the higher spatial resolution model of 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. II - Regional Study' (the Regional Study), which better represents the impact of congestion on least-cost scheduling and dispatch, provides a deeper understanding of the relationship among renewable energy (RE) location, transmission, and system flexibility with regard to RE integration, compared to 'Greening the Grid: Pathways to Integrate 175 Gigawatts of Renewable Energy into India's Electric Grid, Vol. I - National Study.'« less