The electrochemical behaviour study of La3+ ion in fused chlorides bath. The LaNi5 formation

International Nuclear Information System (INIS)

Dias, Cristiane

2002-01-01

The electrochemical behaviour of La 3+ ion was studied in fused chlorides bath, with purpose to obtain LaNi 5 formation parameters. The lanthanum reduction/reoxidation mechanism and intermetallic compound formation were investigated by cyclic voltammetry, chronopotentiommetry and galvanostatic electrodeposition. The electrolyte employed was eutectic mixture NaCl-KCl (1:1) with anhydrous LaCl 3 as solute, since 0,25 mol. L -1 up to 2 mol. L -1 , between 700 deg C and 800 deg C. The anhydrous LaCl 3 was prepared by lanthanum chloride slow dehydration with HCl flow and heating until 300 deg C. Over molybdenum, results depicted that lanthanum electrochemical behaviour was quasi-reversible and electrodeposition occurred in a charge transfer step with three electrons. In nickel, intermetallic compound formation was observed by interdiffusion. The scanning electronic microscopy (SEM-EDS) and X ray diffraction analysis indicated that layers composition depend on temperature and solute concentration in fused bath. Mainly LaNi 5 intermetallic compound was formed with LaCl 3 anhydrous concentration of 2 mol. L -1 at 750 deg C, with cathodic current density until 100 mA.cm -2 . (author)

Synthesis of LaNi0,6Fe0.4O3-δ

International Nuclear Information System (INIS)

Ramos, K.; Wendler, L.P.; Chinelatto, A.S.; Chinelatto, A.L.

2012-01-01

The solid oxide fuel cell are an alternative of production clean and efficient energy, because converts chemical energy in electrical energy. An fuel cell is formed basically by an electrolyte, a cathode and an anode.The main electrolyte used for SOFC manufacturing is the ZrO 2 -Y 2 O 3 . The materials for electrode manufacturing must possess thermal expansion characteristics close to electrolyte and have high electrical conductivity in operating temperature.Recently, the perovskite LaNi 0,6 Fe 0,4 O 3-δ , has attracted interest for application as cathode in SOFC's. This work aimed to LaNi 0,6 Fe 0,4 O 3-δ obtained by Pechini method. The powders were characterized by x-ray diffraction, ray-x fluorescence, heliumpicnometry and scanning electron microscopy. The results showed powders obtained with perovskite formation when calcined 600°C during 2 hours. (author)

Optimization of Acid Orange 7 Degradation in Heterogeneous Fenton-like Reaction Using Fe3-xCoxO4 Catalyst

Science.gov (United States)

Ibrahim, M. Z.; Alrozi, R.; Zubir, N. A.; Bashah, N. A.; Ali, S. A. Md; Ibrahim, N.

2018-05-01

The oxidation process such as heterogeneous Fenton and/or Fenton-like reactions is considered as an effective and efficient method for treatment of dye degradation. In this study, the degradation of Acid Orange 7 (AO7) was investigated by using Fe3-xCoxO4 as a heterogeneous Fenton-like catalyst. Response surface methodology (RSM) was used to optimize the operational parameters condition and the interaction of two or more parameters. The parameter studies were catalyst dosage (X1 ), pH (X2 ) and H2O2 concentration (X3 ) towards AO7 degradation. Based on analysis of variance (ANOVA), the derived quadratic polynomial model was significant whereby the predicted values matched the experimental values with regression coefficient of R2 = 0.9399. The optimum condition for AO7 degradation was obtained at catalyst dosage of 0.84 g/L, pH of 3 and H2O2 concentration of 46.70 mM which resulted in 86.30% removal of AO7 dye. These findings present new insights into the influence of operational parameters in the heterogeneous Fenton-like oxidation of AO7 using Fe3-xCoxO4 catalyst.

Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing

Directory of Open Access Journals (Sweden)

Ralf Moos

2007-09-01

Full Text Available In the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested successfully. All of these sensor devicesshowed improved sensor functionality in comparison to conventional microscaled thickfilms. In order to explain the impact of the enhanced surface-to-volume ratio on sensorproperties in a quantitative way, a mechanistic model was applied to micro- and nanoscaleddevices. In contrast to the conventional diffusion-reaction model that has been proposed forn-type semiconducting sensors, it contained novel approaches with respect to themicroscopic mechanism. With very few fit variables, the present model was found torepresent well sensor functionality of p-type conducting SrTi0.8Fe0.2O3-δ films. In additionto the temperature dependency of the sensor response, the effect of the specific surface areaon the sensor response was predicted.

Structural, magnetic and high-temperature thermoelectric properties of La0.4Bi0.4Ca0.2Mn1-xCoxO3 (0 ≤ x ≤ 0.3) perovskites

Science.gov (United States)

Hira, Uzma; Sher, Falak

2018-04-01

In this study, we have investigated the structural, magnetic and thermoelectric properties of La0.4Bi0.4Ca0.2Mn1-xCoxO3 (0 ≤ x ≤ 0.3) manganites. The crystallographic parameters of samples were determined by the Rietveld refinement of powder X-ray diffraction data. It was observed that Co doping results in change of crystal structures from orthorhombic (space group: Pbnm) to rhombohedral (space group: R-3c) symmetry. Scanning electron microscopy (SEM) images show smooth, clean and densified structures, depicting good crystallinity of samples. The zero field cooled (ZFC) and field cooled (FC) magnetization data were collected in the temperature range 5 to 300 K under an applied magnetic field of 0.1 Tesla. The analysis of temperature dependent magnetization data reveals all samples to be ferromagnetic with Curie temperatures around ∼77 K. The magnetic hysteresis loops, collected at 5 K, show that the saturation magnetization (MS) values decrease from 43 emu/g to 14 emu/g with increase in Co doping. The high temperature thermoelectric properties of all samples are characteristic of a semiconducting behavior, the small polaron hopping model fitting well with the temperature dependent electrical resistivity (ρ) and thermopower (S) data. The thermopower values change sign from positive to negative as temperature is increased from 313 K to 680 K. The maximum thermoelectric power factor (PF = S2/ρ) obtained for x = 0.3 sample at 313 K is 4.60 μW/mK2, is much higher than for the undoped sample.

Physicochemical and thermodynamic investigation of hydrogen absorption and desorption in LaNi3.8Al1.0Mn0.2 using the statistical physics modeling

Science.gov (United States)

Bouaziz, Nadia; Ben Manaa, Marwa; Ben Lamine, Abdelmottaleb

2018-06-01

In the present work, experimental absorption and desorption isotherms of hydrogen in LaNi3.8Al1.0Mn0.2 metal at two temperatures (T = 433 K, 453 K) have been fitted using a monolayer model with two energies treated by statistical physics formalism by means of the grand canonical ensemble. Six parameters of the model are adjusted, namely the numbers of hydrogen atoms per site nα and nβ, the receptor site densities Nmα and Nmβ, and the energetic parameters Pα and Pβ. The behaviors of these parameters are discussed in relationship with temperature of absorption/desorption process. Then, a dynamic investigation of the simultaneous evolution with pressure of the two α and β phases in the absorption and desorption phenomena using the adjustment parameters. Thanks to the energetic parameters, we calculated the sorption energies which are typically ranged between 276.107 and 310.711 kJ/mol for absorption process and between 277.01 and 310.9 kJ/mol for desorption process comparable to usual chemical bond energies. The calculated thermodynamic parameters such as entropy, Gibbs free energy and internal energy from experimental data showed that the absorption/desorption of hydrogen in LaNi3.8Al1.0Mn0.2 alloy was feasible, spontaneous and exothermic in nature.

Study of the aging of LaNi3.55Mn0.4Al0.3(Co1-xFex)0.75 (0≤x≤1) compounds in Ni-MH batteries by SEM and magnetic measurements

International Nuclear Information System (INIS)

Ayari, M.; Paul-Boncour, V.; Lamloumi, J.; Percheron-Guegan, A.; Guillot, M.

2005-01-01

The study of LaNi 3.55 Mn 0.4 Al 0.3 (Co 1-x Fe x ) 0.75 (0≤x≤1) alloys as material for negative electrodes in Ni-MH batteries has shown that the electrochemical cycle life is strongly dependent on the amount of substituted iron. The samples have been characterized before and after 2 to 50 electrochemical cycles by scanning electron microscopy (SEM) and magnetization measurements in order to follow the decrepitation and the decomposition of the alloys. The bulk magnetic properties of the alloy show an evolution from a spin glass behaviour dominated by antiferromagnetic interactions towards a ferromagnetic behaviour as the Fe content increases. After electrochemical cycling, the alloys are partially decomposed into La hydroxide and small metallic and oxidized transition metal particles. A correlation has been established between the loss of electrochemical capacity and the alloy decomposition which reaches 45% after 50 cycles for x=1, whereas it remains limited to 10-15% for x=0 and 0.47. A model combining both SEM and magnetic results has been used to estimate the average thickness of the corrosion layer

Study of the structural, thermodynamic and electrochemical properties of LaNi3.55Mn0.4Al0.3(Co1-xFe x)0.75 (0 ≤ x ≤ 1) compounds used as negative electrode in Ni-MH batteries

International Nuclear Information System (INIS)

Ayari, M.; Paul-Boncour, V.; Lamloumi, J.; Mathlouthi, H.; Percheron-Guegan, A.

2006-01-01

This study concerns the influence of iron for cobalt substitution on the structural, thermodynamic and electrochemical properties of the hydrides of poly-substituted LaNi 3.55 Mn 0.4 Al 0.3 (Co 1-x Fe x ) 0.75 (0 ≤ x ≤ 1) alloys used as material for negative electrode in Ni-MH batteries. The Fe substitution leads to an increase of the cell parameter, this increase is linear according to the rate of substitution, and a decrease of the equilibrium pressure in agreement with the geometric law. Nevertheless, it is observed that the Fe substitution leads to a deviation from the linear variation between the logarithm of the pressure and the cell volume observed for Co, Mn and Al for Ni substitution. The Fe for Co substitution leads also to a decrease of the solid-gas and electrochemical capacity

Thermochemistry of 1,1,3,3-tetramethylguanidine and 1,1,3,3-tetramethylguanidinium nitrate

International Nuclear Information System (INIS)

Vitorino, Joana; Agapito, Filipe; Piedade, M. Fátima M.; Bernardes, Carlos E.S.; Diogo, Hermínio P.; Leal, João P.

2014-01-01

Graphical abstract: - Highlights: • The enthalpy of formation of 1,1,3,3-tetramethylguanidinium nitrate was determined by combustion calorimetry. • The cohesive energy of liquid 1,1,3,3-tetramethylguanidinium nitrate was evaluated. • The crystal structure of 1,1,3,3-tetramethylguanidinium nitrate was determined by single crystal X-ray diffraction. • Δ f H m o (l/g) of 1,1,3,3-tetramethylguanidine (tmg) were obtained by solution and Calvet calorimetry. • Δ f H m o (g) calculated by the W1-F12 procedure was in excellent agreement with the corresponding experimental value. - Abstract: Considerable efforts have recently been made to investigate how the structure of protic ionic liquids determines some of their most important properties for technological applications (e.g. low vapour pressure, conductivity). In contrast, the assessment of cohesive energies (which are also linked to those properties) based on thermodynamic results is still practically unexplored. This problem is addressed here for 1,1,3,3-tetramethylguanidinium nitrate, [Htmg][NO 3 ], through a combination of experimental and computational chemistry results at the reference temperature of 298.15 K. The standard molar enthalpies of formation, Δ f H m o ([Htmg][NO 3 ],cr)=-(311.8±2.3)kJ·mol -1 , and fusion, Δ fus H m o ([Htmg][NO 3 ])=16.2±3.8kJ·mol -1 , of solid 1,1,3,3-tetramethylguanidinium nitrate (form I polymorph) were obtained by combustion and differential scanning calorimetry, respectively. From these results Δ f H m o ([Htmg][NO 3 ],l)=-(295.6±4.4)kJ·mol -1 could be derived. Also determined were the standard molar enthalpies of formation, Δ f H m o (tmg, l)=7.7±2.8kJ·mol -1 , and vaporisation, Δ vap H m o (tmg,l)=50.0±1.2kJ·mol -1 , of 1,1,3,3-tetramethylguanidine, by reaction solution and Calvet-drop microcalorimetry, respectively, leading to Δ f H m o (tmg,g)=57.7±3.0kJ·mol -1 . This result is in excellent agreement with Δ f H m o (tmg,g)=58.4±4.0kJ·mol -1

Comparative study of LaNiO$_3$/LaAlO$_3$ heterostructures grown by pulsed laser deposition and oxide molecular beam epitaxy

OpenAIRE

Wrobel, F.; Mark, A. F.; Christiani, G.; Sigle, W.; Habermeier, H. -U.; van Aken, P. A.; Logvenov, G.; Keimer, B.; Benckiser, E.

2017-01-01

Variations in growth conditions associated with different deposition techniques can greatly affect the phase stability and defect structure of complex oxide heterostructures. We synthesized superlattices of the paramagnetic metal LaNiO3 and the large band gap insulator LaAlO3 by atomic layer-by-layer molecular beam epitaxy (MBE) and pulsed laser deposition (PLD) and compared their crystallinity, microstructure as revealed by high-resolution transmission electron microscopy images and resistiv...

Reentrant spin glass behavior in polycrystalline La0.7Sr0.3Mn1-XFeXO 3

Directory of Open Access Journals (Sweden)

Xavier Jr. M.M.

2004-01-01

Full Text Available The magnetic and transport properties of the compound La0.7Sr0.3Mn1-xFe xO 3 (0.1 < x <0.4 have been studied by means of electrical resistivity, AC magnetic susceptibility, and DC magnetization. At low concentrations (x <0.1, the system displays essentially para-to-ferromagnetic transitions as the temperature is decreased, although a decrease in the magnetic moment has been observed in previous studies at temperatures a little below T C. This ferromagnetism is explained by double exchange theory in terms of the formation of Mn+3/Mn+4 ions pairs in the system. At concentrations in the range 0.1 < x <0.4 the system is more complex. Increased Fe doping not only weakens the ferromagnetic (FM order and augments the resistivity of the samples, but also induces the appearance of a reentrant spin glass phase at low temperatures (T < 60 K. Irreversibility of the magnetization measured with zero field cooling and with field cooling has been observed. In addition, the AC susceptibility peak position varies with frequency. All these effects are characteristic of spin glass behavior. The results have been interpreted based in an increase of frustration due to increasing competition between FM Mn+3/Mn+4 interactions and antiferromagnetic interactions between ions at the boundaries of Fe clusters.

Orientation control of chemical solution deposited LaNiO3 thin films

International Nuclear Information System (INIS)

Ueno, Kengo; Yamaguchi, Toshiaki; Sakamoto, Wataru; Yogo, Toshinobu; Kikuta, Koichi; Hirano, Shin-ichi

2005-01-01

High quality LaNiO 3 (LNO) thin films with preferred orientation could be synthesized on Pt/Ti/SiO 2 /Si substrates at 700 deg. C using the chemical solution deposition method. The homogeneous and stable LNO precursor solutions were prepared using lanthanum isopropoxide and nickel (II) acetylacetonate in a mixed solvent of absolute ethanol and 2-methoxyethanol. The oriented LNO thin films exhibit metallic electro-conduction, and their resistivity at room temperature is sufficiently low for making them an alternative electrode material for functional ceramic thin films

Neutron diffraction and magnetic study of the Nd0.7Pb0.3Mn1-xFexO3 (0=1) perovskites

International Nuclear Information System (INIS)

Blanco, J.J.; Insausti, M.; Gil de Muro, I.; Lezama, L.; Rojo, T.

2006-01-01

The effect of Fe doping on the ferromagnetic Nd 0.7 Pb 0.3 Mn 1-x Fe x O 3 (x=0, 0.025, 0.05, 0.075, 0.1) phases has been studied in order to analyze the double-exchange interaction. The structural and magnetic study has been carried out by neutron powder diffraction and susceptibility measurements between 1.7 and 300K. The substitution of Fe at the Mn site results in reductions in both the Curie temperature T c and the magnetic moment per Mn ion without appreciable differences in the crystal structures. All the compounds crystallize in Pnma space group. The thermal evolution of the lattice parameters of the Nd 0.7 Pb 0.3 Mn 1-x Fe x O 3 (x=0.025, 0.05, 0.075) compounds shows discontinuities in volume and lattice parameters close to the magnetic transition temperature. Increasing amounts of Fe 3+ reduces the double exchange interactions and no magnetic contribution for x=0.1 is observed. The magnetic structures of Nd 0.7 Pb 0.3 Mn 1-x Fe x O 3 (x=0, 0.025, 0.05, 0.075) compounds show that the Nd and Mn ions are ferromagnetically ordered

Synthesis of LaNiO3 perovskite type by chelating precursor method using EDTA: optimization of chelating content

International Nuclear Information System (INIS)

Santos, Jose Carlos dos; Pedrosa, Anne Michelle Garrido; Mesquita, Maria Eliane; Souza, Marcelo Jose Barros de

2011-01-01

The perovskites are strategic materials due their catalytic, electronic and magnetic properties. These properties are influenced by the calcination and synthesis conditions. In this work was carried out the synthesis of LaNiO 3 perovskite type by chelating precursor method using EDTA and also was studied the optimization of the EDTA content in the synthesis. The synthesized materials were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TG) and Infrared Spectroscopy (FTIR). In the optimization of the EDTA content the lowest ratio of metal / EDTA used was 1.0 / 0.1, where it was possible to obtain monophasic perovskite. (author)

Tritium aging effect of LaNi4.9Al0.1Dx on de-deuterating kinetics

International Nuclear Information System (INIS)

Xiong Yifu; Luo Deli; Li Rong

2002-01-01

Kinetics parameters are measured at different aging times of LaNi 4.9 Al 0.1 alloy. The influence of tritium aging on kinetic feature of LaNi 4.9 Al 0.1 alloy is assessed. The results show that reaction rate decreases with aging time, but tritium aging does not change de-deuterating reaction order. De-deuterating reaction orders a (with respect to deuterium pressure) and b (with respect to deuterium content) are 0.5 and 1, respectively. Activation energy (E) increases with aging time. After 1120 d, the reaction rate constant is decreased by two orders of magnitude, activation energy is increased by a factor of 0.3

Structural and optical properties of cobalt doped multiferroics BiFeO3 nanostructure thin films

Science.gov (United States)

Prasannakumara, R.; Naik, K. Gopalakrishna

2018-05-01

Bismuth ferrite (BiFeO3) and Cobalt doped BiFeO3 (BiFe1-XCoXO3) nanostructure thin films were deposited on glass substrates by the sol-gel spin coating method. The X-ray diffraction patterns (XRD) of the grown BiFeO3 and BiFe1-XCoXO3 nanostructure thin films showed distorted rhombohedral structure. The shifting of peaks to higher angles was observed in cobalt doped BiFeO3. The surface morphology of the BiFeO3 and BiFe1-XCoXO3 nanostructure thin films were studied using FESEM, an increase in grain size was observed as Co concentration increases. The thickness of the nanostructure thin films was examined using FESEM cross-section. The EDX studies confirmed the elemental composition of the grown BiFeO3 and BiFe1-XCoXO3 nanostructure thin films. The optical characterizations of the grown nanostructure thin films were carried out using FTIR, it confirms the existence of Fe-O and Bi-O bands and UV-Visible spectroscopy shows the increase in optical band gap of the BiFeO3 nanostructure thin films with Co doping by ploting Tauc plot.

Magnetic properties of intermetallic compounds La(Ni,Co,Cu)3

Science.gov (United States)

Tazuke, Y.; Tanikawa, H.; Okano, A.; Miyaji, T.

2006-09-01

LaNi3 exhibited a metallic antiferromagnetic property with T N = 30 K. La(Ni1-x Cox )3 with x = 0.01, 0.03 and 0.05 exhibited ferromagnetic properties, T C increasing linearly with increasing x . La(Ni1-2z Coz Cuz )3 with z = 0.015 exhibited a ferromagnetic property with a small T C. A La(Ni1-y Cuy )3 sample with y = 0.01 exhibited a Pauli-paramagnetic property; those with y = 0.02, 0.03 and 0.04 exhibited gradual metamagnetic behavior and that with y = 0.05 exhibited a ferromagnetic property. The gradual metamagnetic M -H variations are numerically simulated by using Landau-type free energies. The results suggest that the gradual metamagnetic behavior occurs from an antiferromagnetic state to a ferromagnetic one.

Generalizable, Electroless, Template-Assisted Synthesis and Electrocatalytic Mechanistic Understanding of Perovskite LaNiO3 Nanorods as Viable, Supportless Oxygen Evolution Reaction Catalysts in Alkaline Media.

Science.gov (United States)

McBean, Coray L; Liu, Haiqing; Scofield, Megan E; Li, Luyao; Wang, Lei; Bernstein, Ashley; Wong, Stanislaus S

2017-07-26

The oxygen evolution reaction (OER) is a key reaction for water electrolysis cells and air-powered battery applications. However, conventional metal oxide catalysts, used for high-performing OER, tend to incorporate comparatively expensive and less abundant precious metals such as Ru and Ir, and, moreover, suffer from poor stability. To attempt to mitigate for all of these issues, we have prepared one-dimensional (1D) OER-active perovskite nanorods using a unique, simple, generalizable, and robust method. Significantly, our work demonstrates the feasibility of a novel electroless, seedless, surfactant-free, wet solution-based protocol for fabricating "high aspect ratio" LaNiO 3 and LaMnO 3 nanostructures. As the main focus of our demonstration of principle, we prepared as-synthesized LaNiO 3 rods and correlated the various temperatures at which these materials were annealed with their resulting OER performance. We observed generally better OER performance for samples prepared with lower annealing temperatures. Specifically, when annealed at 600 °C, in the absence of a conventional conductive carbon support, our as-synthesized LaNiO 3 rods not only evinced (i) a reasonable level of activity toward OER but also displayed (ii) an improved stability, as demonstrated by chronoamperometric measurements, especially when compared with a control sample of commercially available (and more expensive) RuO 2 .

Electrical properties of (1 0 0)-predominant BaTiO3 films derived from alkoxide solutions of two concentrations

International Nuclear Information System (INIS)

Guo Yiping; Suzuki, Kazuyuki; Nishizawa, Kaori; Miki, Takeshi; Kato, Kazumi

2006-01-01

Lead-free piezoelectric films with thickness larger than 1 μm integrated on silicon substrates have been receiving considerable attention because of environmental concerns and their potential applications in microelectromechanical systems. We demonstrate that, by chemical solution deposition, it is possible to process (1 0 0)-predominant 1 μm BaTiO 3 films on LaNiO 3 /Pt/TiO x /SiO 2 /Si substrates using thinner high-crystallinity columnar BaTiO 3 films as buffer layers. We point out that this kind of buffer layer prepared with a lower concentration solution on the surface of an LaNiO 3 /Pt electrode is effective in enhancing the crystallinity and orientation degree of final BaTiO 3 films prepared with a higher concentration solution. The 1 μm BaTiO 3 films show good dielectric and insulating characteristics against an applied field, and the conduction current shows Schottky emission behavior at modest voltage and space-charge-limited behavior at higher voltage. We also demonstrate that the (1 0 0)-predominant 1 μm BaTiO 3 films have excellent piezoelectric properties: piezoelectric coefficients d 33 higher than 50 pm/V have been determined for the bare films using atomic force microscopy, which are comparable to those of Pb(Zr,Ti)O 3 films. These results indicate that the (1 0 0)-predominant BaTiO 3 films should be promising candidates for microelectromechanical systems applications

Magnetic properties of intermetallic compounds La(Ni,Co,Cu)3

International Nuclear Information System (INIS)

Tazuke, Y.; Tanikawa, H.; Okano, A.; Miyaji, T.

2006-01-01

LaNi 3 exhibited a metallic antiferromagnetic property with T N =30 K. La(Ni 1-x Co x ) 3 with x=0.01, 0.03 and 0.05 exhibited ferromagnetic properties, T C increasing linearly with increasing x. La(Ni 1-2z Co z Cu z ) 3 with z=0.015 exhibited a ferromagnetic property with a small T C . A La(Ni 1-y Cu y ) 3 sample with y=0.01 exhibited a Pauli-paramagnetic property; those with y=0.02, 0.03 and 0.04 exhibited gradual metamagnetic behavior and that with y=0.05 exhibited a ferromagnetic property. The gradual metamagnetic M-H variations are numerically simulated by using Landau-type free energies. The results suggest that the gradual metamagnetic behavior occurs from an antiferromagnetic state to a ferromagnetic one. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (Abstract Copyright [2006], Wiley Periodicals, Inc.)

Dry etching of LaNiO3 thin films using inductively coupled plasma

International Nuclear Information System (INIS)

Kim, Gwan-Ha; Kim, Dong-Pyo; Kim, Kyoung-Tae; Kim, Chang-Il; Lee, Cheol-In; Kim, Tae-Hyung

2006-01-01

The etching characteristics of LaNiO 3 (LNO) thin films and SiO 2 in Cl 2 /Ar plasma were investigated. LNO etch rates decreased with increasing Cl 2 fraction in Ar plasma and the working pressure. Langmuir probe measurement showed a noticeable influence of Cl 2 /Ar mixing ratio on electron temperature, electron density, and ion current density. The modeling of volume kinetics for charged particles and OES measurements for neutral atoms indicated monotonous changes of both densities and fluxes of active species such as chlorine atoms and positive ions. The LNO etch rate behavior may be explained by physical mechanisms

Role of oxygen defects on the magnetic properties of ultra-small Sn1-xFexO2 nanoparticles

Science.gov (United States)

Dodge, Kelsey; Chess, Jordan; Eixenberger, Josh; Alanko, Gordon; Hanna, Charles B.; Punnoose, Alex

2013-05-01

Although the role of oxygen defects in the magnetism of metal oxide semiconductors has been widely discussed, it is been difficult to directly measure the oxygen defect concentration of samples to verify this. This work demonstrates a direct correlation between the photocatalytic activity of Sn1-xFexO2 nanoparticles and their magnetic properties. For this, a series of ˜2.6 nm sized, well characterized, single-phase Sn1-xFexO2 crystallites with x = 0-0.20 were synthesized using tin acetate, urea, and appropriate amounts of iron acetate. X-ray photoelectron spectroscopy confirmed the concentration and 3+ oxidation state of the doped Fe ions. The maximum magnetic moment/Fe ion, μ, of 1.6 × 10-4 μB observed for the 0.1% Fe doped sample is smaller than the expected spin-only contribution from either high or low spin Fe3+ ions, and μ decreases with increasing Fe concentration. This behavior cannot be explained by the existing models of magnetic exchange. Photocatalytic studies of pure and Fe-doped SnO2 were used to understand the roles of doped Fe3+ ions and of the oxygen vacancies and defects. The photocatalytic rate constant k also showed an increase when SnO2 nanoparticles were doped with low concentrations of Fe3+, reaching a maximum at 0.1% Fe, followed by a rapid decrease of k for further increase in Fe%. Fe doping presumably increases the concentration of oxygen vacancies, and both Fe3+ ions and oxygen vacancies act as electron acceptors to reduce e--h+ recombination and promote transfer of electrons (and/or holes) to the nanoparticle surface, where they participate in redox reactions. This electron transfer from the Fe3+ ions to local defect density of states at the nanoparticle surface could develop a magnetic moment at the surface states and leads to spontaneous ferromagnetic ordering of the surface shell under favorable conditions. However, at higher doping levels, the same Fe3+ ions might act as recombination centers causing a decrease of both k and

Local geometric and electronic structures and origin of magnetism in Co-doped BaTiO3 multiferroics

Science.gov (United States)

Phan, The-Long; Thang, P. D.; Ho, T. A.; Manh, T. V.; Thanh, Tran Dang; Lam, V. D.; Dang, N. T.; Yu, S. C.

2015-05-01

We have prepared polycrystalline samples BaTi1-xCoxO3 (x = 0-0.1) by solid-state reaction. X-ray diffraction and Raman-scattering studies reveal the phase separation in crystal structure as changing Co-doping content (x). The samples with x = 0-0.01 are single phase in a tetragonal structure. At higher doping contents (x > 0.01), there is the formation and development of a secondary hexagonal phase. Magnetization measurements at room temperature indicate a coexistence of paramagnetic and weak-ferromagnetic behaviors in BaTi1-xCoxO3 samples with x > 0, while pure BaTiO3 is diamagnetic. Both these properties increase with increasing x. Analyses of X-ray absorption spectra recorded from BaTi1-xCoxO3 for the Co and Ti K-edges indicate the presence of Co2+ and Co3+ ions. They locate in the Ti4+ site of the tetragonal and hexagonal BaTiO3 structures. Particularly, there is a shift of oxidation state from Co2+ to Co3+ when Co-doping content increases. We believe that the paramagnetic nature in BaTi1-xCoxO3 samples is due to isolated Co2+ and Co3+ centers. The addition of Co3+ ions enhances the paramagnetic behavior. Meanwhile, the origin of ferromagnetism is due to lattice defects, which is less influenced by the changes caused by the variation in concentration of Co2+ and Co3+ ions.

Effect of thermal strain on structure and polarization fatigue of CSD-derived PbZr0.53Ti0.47O3/LaNiO3 hetero-structures

International Nuclear Information System (INIS)

Wang, G.S.; Remiens, D.; Dogheche, E.; Dong, X.L.

2007-01-01

PbZr 0.53 Ti 0.47 O 3 /LaNiO 3 (PZT/LNO) hetero-structures have been successfully deposited on MgO, SrTiO 3 , Al 2 O 3 and Si substrate by chemical solution routes, respectively. The X-ray diffraction measurements show that out-of-plane lattice parameters of PZT increase as increase of thermal expansion coefficient of substrate. Polarization fatigues of Pt/PZT/LNO capacitors are strongly affected by the thermal strain caused by difference of thermal expansion coefficient between PZT and substrate materials. High fatigue resistance of Pt/PZT/LNO can be obtained by using substrate with similar thermal expansion coefficient as PZT. (orig.)

(E-3-Methyl-6-(3-oxo-3-(3,4,5-trimethoxyphenylprop-1-en-1-yl-2(3H-benzothiazolone

Directory of Open Access Journals (Sweden)

Yordanka Ivanova

2016-09-01

Full Text Available The title compound, (E-3-methyl-6-(3-oxo-3-(3,4,5-trimethoxyphenylprop-1-en-1-yl-2(3H-benzothiazolone, was synthesized by both an acid- and base-catalyzed aldol condensation of 3-methyl-6-acetyl-2(3H-benzothiazolone and 3,4,5-trimethoxyacetophenone. The structure of the target compound was confirmed using 1H-NMR, 13C-NMR, IR, MS, and elemental analysis.

Comparison of reduction agents in the synthesis of infinite-layer LaNiO2 films

International Nuclear Information System (INIS)

Ikeda, Ai; Manabe, Takaaki; Naito, Michio

2014-01-01

Highlights: • Reduction agents were compared from a viewpoint of the facility for topotactic reduction of LaNiO 3 to LaNiO 2 films. • TiH 2 and CaH 2 yielded infinite-layer LaNiO 2 with low and metallic resistivity. • H 2 released from metal hydrides plays a dominant role in the topotactic reduction. - Abstract: Reduction agents, such as activated carbon, TiH 2 , and CaH 2 , were compared from a viewpoint of the facility for the topotactic reduction of LaNiO 3 to LaNiO 2 films. Activated carbon did not yield infinite-layer LaNiO 2 whereas both of TiH 2 and CaH 2 yielded infinite-layer LaNiO 2 with low resistivity (∼1 mΩ cm at 300 K) as well as metallic behavior down to 70 K. Thermal desorption spectroscopy indicated that H 2 released from metal hydrides plays a dominant role in the topotactic reduction

An electron spin resonance study on the gamma-irradiation of urea, urea- d4, 1-3-dimethylurea, 1-3-diethylurea and 1,1',3,3'-tetramthylurea

International Nuclear Information System (INIS)

Kang, Y.S.; McManus, H.J.D.; Kevan, L.

1994-01-01

Urea, urea-d 4 , 1,3-dimethylurea, 1,3-diethylurea powder and 1,1',3,3'-tetramethylurea, and their solutions in D 2 O were γ-irradiated with 0.0882 kGy both at room temperature and at 77 K. The product radicals were identified with X-band electron spin resonance, based on the g-factor and hyperfine coupling constants. The radicals formed from urea and urea-d 4 were identified as nitrogen-centered and resulted from N-H bond dissociation. The radicals produced from 1,3-dimethylurea, 1,3-diethylurea and 1,1',3,3'-tetramethylurea were identified as carbon-centered and resulted from C-H bond cleavage. The electron spin resonance signals of 1,3-dimethylurea, 1,3-diethylurea and 1,1',3,3'-tetramethylurea are similar in both the powder and D 2 O solution. The radicals observed from 1,3-dimethylurea, 1,3-diethylurea and 1,1',3,3'-tetramethylurea were identified as . NH-CH 2 , . NH-CHCH 3 and . (CH 3 )(CH 2 ), respectively. (author)

On D=2 (1/3,1/3) supersymmetric theories 2

International Nuclear Information System (INIS)

Saidi, E.H.; Zerouaoui, J.; Sedra, M.B.

1994-06-01

Denoting by D=2 (1/3,1/3) superalgebra; the off critical symmetry of the Φ 5/7,5/7 perturbation of the C=6/7 conformal theory, we build a new superspace solution of the (1/3,1/3) - subalgebra generated by spin ±1/3 charge operators extending the usual (1/2,1/2) supersymmetry generated by spin ±1/2 charges. This solution is based on the use of two Grassmann variables instead of one parafermionic variable θ ±1/3 satisfying the cubic nilpotency condition (θ ±1/3 ) 3 =0. Known results on the C=6/7 tricritical Potts model are recovered as special features. A relation with N=2 Landau-Ginzburg models is also discussed. (author). 17 refs, 1 tab

40 CFR 721.8145 - Propane,1,1,1,2,2,3,3-heptafluoro-3-methoxy-.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Propane,1,1,1,2,2,3,3-heptafluoro-3-methoxy-. 721.8145 Section 721.8145 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... significant new uses are: (i) Industrial, commercial, and consumer activities. Requirements as specified § 721...

Performance comparison of 2-1-3, 1-3 and 1-3-2 piezoelectric composite transducers by finite element method

Directory of Open Access Journals (Sweden)

Y. Sun

2018-03-01

Full Text Available 1-3 type, 1-3-2 type and 2-1-3 type piezoelectric composites are three proper smart materials for the design and manufacture of ultrasonic transducers. They have been proposed in different stages but possess similar properties. Compared with the initial 1-3 type composite, 1-3-2 composite is of higher mechanical stability. Compared with 1-3-2 composite, 2-1-3 composite has lower manufacturing difficulty. In this paper, a comparative study on these three composites in terms of receiving transducer material properties is presented. Finite element method (FEM has been adopted to calculate longitudinal velocity, thickness electromechanical coupling coefficient and voltage receiving sensitivity. It is concluded that for a large aspect ratio α=1, the performance of 2-1-3 composite transducer is much better than that of 1-3 and 1-3-2 composite transducers. The thickness electromechanical coupling coefficient of 2-1-3 composite transducer is about 5.58 times that of 1-3 composite transducer and 7.42 times that of 1-3-2 composite transducer. The voltage receiving sensitivity at 2 kHz of 2-1-3 composite transducer is 13.1 dB higher than that of 1-3-2 composite transducer and 12.3 dB higher than that of 1-3 composite transducer.

A fast and environment-friendly method for determination of chemical oxygen demand by using the heterogeneous Fenton-like process (H2O2/Fe(3-x)Co(x)O4 nanoparticles) as an oxidant.

Science.gov (United States)

Esteves, Lorena C R; Oliveira, Thaís R O; Souza, Elias C; Bomfeti, Cleide A; Gonçalves, Andrea M; Oliveira, Luiz C A; Barbosa, Fernando; Pereira, Márcio C; Rodrigues, Jairo L

2015-04-01

An easy, fast and environment-friendly method for COD determination in water is proposed. The procedure is based on the oxidation of organic matter by the H2O2/Fe(3-x)Co(x)O4 system. The Fe(3-x)Co(x)O4 nanoparticles activate the H2O2 molecule to produce hydroxyl radicals, which are highly reactive for oxidizing organic matter in an aqueous medium. After the oxidation step, the organic matter amounts can be quantified by comparing the quantity of H2O2 consumed. Moreover, the proposed COD method has several distinct advantages, since it does not use toxic reagents and the oxidation reaction of organic matter is conducted at room temperature and atmospheric pressure. Method detection limit is 2.0 mg L(-1) with intra- and inter-day precision lower than 1% (n=5). The calibration graph is linear in the range of 2.0-50 mg L(-1) with a sample throughput of 25 samples h(-1). Data are validated based on the analysis of six contaminated river water samples by the proposed method and by using a comparative method validated and marketed by Merck, with good agreement between the results (t test, 95%). Copyright © 2014 Elsevier B.V. All rights reserved.

Investigation of structural and hydrogen absorption properties in the LaNi5-xPtx-H2 system

International Nuclear Information System (INIS)

Joubert, J.-M.; Charton, J.; Percheron-Guegan, A.

2003-01-01

The substitution of nickel by platinum in the binary LaNi 5 compound (CaCu 5 structure type, a=5.019(1) A, c=3.981(1) A, space group P6/mmm) and its effect on the hydrogenation properties was studied. The phase LaNi 5-x Pt x has a homogeneity domain ranging from x=0 to 5. For x 3. Contrary to what is observed in other systems, the hydrogen absorption plateau pressure was found to increase as a function of the cell volume. Powder neutron diffraction experiments were conducted for two deuterated compounds with x=0.25 and 0.75. Deuterium partial ordering occurs in the case of x=0.25 leading to a symmetry decrease to the space group P6mm (LaNi 4.75 Pt 0.25 D 5.23 , a=4.225(1) A, c=5.357(1) A, Z=1, R Bragg =3.3%). For x=0.75, an orthorhombic superstructure based on the CaCu 5 -type lattice was found (LaNi 4.25 Pt 0.75 D 2.61 , a orth =√3a hex =9.089(1) A, b orth =b hex =5.272(1) A, c orth =2c hex =8.145(1) A, Z=4, SG Ibam, R Bragg =6.1%)

Influence of grain size on the electrochemical properties of LaNi3.55 AL0.3 Mn0.4 Co0.75 compound use for Ni-MH battery

International Nuclear Information System (INIS)

Luu Tuan Tai; Tran Bao Trung; Than Duc Hien; Luu Hoai Nam

2007-01-01

In this work, LaNi 3.55 Al 0.3 Mn 0.4 Co 0.75 compounds were prepared by are melting method in the Ar atmosphere. The structure and grain size were tested by X-ray diffraction and TEM measurements. Electrochemical properties and battery parameter were carried out by bipotentiostat and battery tester equipment s. The results show that with the grain size 50 μm, capacity of the negative electrode reduces to 40 nm, the capacity rapidly increase to 170 mAh/g and other battery parameter also improve. (author)

Spin freezing phenomenon and transport properties in La{sub 1/3}Nd{sub 1/3}Ba{sub 1/3}MnO{sub 3}

Energy Technology Data Exchange (ETDEWEB)

Li Guoqing E-mail: gqli@mail.sy.ln.cn; Ze Xianyu; Kim, C.-O.; Kim, H.-J.; Lee, Y.-W

2002-02-01

The magnetic and transport properties of La{sub 1/3}Nd{sub 1/3}Ba{sub 1/3}MnO{sub 3} with the colossal magnetoresistant (CMR) effect were studied by using SQUID. The irreversible curve for magnetizing intensity vs. temperature in an applied magnetic field of 13 Oe indicates that the spins of electrons are frozen, and therefore spin-glass state is probably formed below the Curie temperature. This fact implied that La{sub 1/3}Nd{sub 1/3}Ba{sub 1/3}MnO{sub 3} is mictomagnetic, that is, ferromagnetism and antiferromagnetism co-exist in this kind of material.

2,3-Dibromo-3-(2-bromophenyl-1-(3-phenylsydnon-4-ylpropan-1-one

Directory of Open Access Journals (Sweden)

Balakrishna Kalluraya

2010-12-01

Full Text Available In the title compound [systematic name: 2,3-dibromo-3-(2-bromophenyl-1-(5-oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylpropan-1-one], C17H11Br3N2O3, the oxadiazole ring is essentially planar, with a maximum deviation of 0.003 (1 Å. The –CHBr–CHBr– chain and bromophenyl ring are disordered over two sets of sites with a refined occupany ratio of 0.756 (5:0.244 (5. The central oxadiazole ring makes dihedral angles of 54.07 (11 and 13.76 (18° with the attached phenyl and the major component of the bromo-substituted benzene rings, respectively. The dihedral angle between the major and minor components of the bromophenyl rings is 13.4 (5°. In the crystal structure, molecules are connected by C—H...O hydrogen bonds, forming [010] ribbons.

Influence of Co doping on structural, optical and magnetic properties of BiFeO3 films deposited on quartz substrates by sol-gel method

Science.gov (United States)

Peng, Lin; Deng, Hongmei; Tian, Jianjun; Ren, Qing; Peng, Cheng; Huang, Zhipeng; Yang, Pingxiong; Chu, Junhao

2013-03-01

Multiferroic BiFe1-xCoxO3 (x = 0, 0.03, 0.05, 0.1) thin films have been prepared on quartz substrates using a sol-gel technique. X-ray diffraction data confirms that Co atoms have been successfully incorporated into the host lattice. The scanning electron microscopy (SEM) exhibits that the surface morphologies of BiFe0.97Co0.03O3 and BiFe0.95Co0.05O3 thin films become more compact and uniform. With increasing Co dopant, the position of A1-1 and E-4 modes shift towards the lower wavenumber indicates that Co doping induces structural distortion of BiFeO3. With increasing Co composition, the fundamental absorption edges of BiFe1-xCoxO3 films show red shift. Furthermore, transmittance spectra demonstrates that the optical band gap of BiFe1-xCoxO3 films decreases from 2.66 eV to 2.53 eV with the increase of Co from x = 0 to 0.1. At the wavelength of 720 nm, the refractive index decreases and the extinction coefficient increases with increasing the amount of Co. Optical properties reveal that Co doping in BiFeO3 provides preliminary research for optoelectronic devices and infrared detectors. Compared with BiFeO3 prepared under similar conditions, the remanent magnetization Mr of BiFe1-xCoxO3 (x = 0.03, 0.05, 0.1) thin films significantly enhanced, which provides potential applications in information storage.

Transport properties and spin correlations of La1.85-xSr0.15+xCu1-xFexO4

DEFF Research Database (Denmark)

Xu, G.J.; Pu, Q.R.; Liu, B.

2004-01-01

A series of double-doped La1.85-xSr0.15+xCu1-xFexO4 (0less than or equal toxless than or equal to1) ceramic samples were prepared by the solid-state reaction method. The structure, transport properties, and spin correlations were studied by means of x-ray diffraction, resistivity, thermoelectric...

Asymmetric oxidation of 1,3-dithianes to 1,3-dithiane 1-oxides

OpenAIRE

Yoshihiko, Watanabe; Yojiro, Ono; Yoshio, Ueno; Takeshi, Toru

1998-01-01

Oxidation of 2-(1-hydroxy-1-methylethyl)-1,3-dithiane with the Sharpless reagent has been examined under various reaction conditions. Oxidation of 2-(1-hydroxy-1-methylethyl)-1,3-dithiane with Ti(OPri)4-diethyl L-(+)-tartrate-tert-butyl hydroperoxide (1:2:1.5) in CH2Cl2 in the presence of 4 A molecular sieves gives (1S,2S)-2-(1-hydroxy-1-methylethyl)-1,3-dithiane 1-oxide with high trans selectivity and with moderate enantioselectivity. The enantioselectivity depends upon the substituent at t...

Local atomic characterization of LiCo1/3Ni1/3Mn1/3O2 cathode material

International Nuclear Information System (INIS)

Nedoseykina, Tatiana; Kim, Sung-Soo; Nitta, Yoshiaki

2006-01-01

Co, Ni and Mn K-edge XAFS investigation of LiCo 1/3 Ni 1/3 Mn 1/3 O 2 as alternative cathode material to commercially used LiCoO 2 in lithium rechargeable battery has been performed. Parameters of a local atomic structure such as radii of metal-oxygen and metal-metal coordination shells and disorder in those shells have been determined. It has been found that the radius of the first coordination shell (metal-oxygen) as well as a local disorder in the second shell (metal-metal) around each of the 3d-metals are in a good agreement with obtained for superlattice model of √3 x √3] R30 o type in triangular lattice of sites by first principle calculation. Other parameters of the local atomic structure around Co, Ni and Mn atoms do not provide evidence for presence of superstructure in LiCo 1/3 Ni 1/3 Mn 1/3 O 2

Annealing effect on the bipolar resistive switching behaviors of BiFeO3 thin films on LaNiO3-buffered Si substrates

International Nuclear Information System (INIS)

Chen Xinman; Zhang Hu; Ruan Kaibin; Shi Wangzhou

2012-01-01

Highlights: ► Annealing effect on the bipolar resistive switching behaviors of BiFeO 3 thin films with Pt/BiFeO 3 /LNO was reported. ► Rectification property was explained from the asymmetrical contact between top and bottom interfaces and the distinct oxygen vacancy density. ► The modification of Schottky-like barrier was suggested to be responsible for the resistance switching behaviors of Pt/BiFeO 3 /LNO devices. - Abstract: We reported the annealing effect on the electrical behaviors of BiFeO 3 thin films integrated on LaNiO 3 (LNO) layers buffered Si substrates by sol–gel spin-coating technique. All the BiFeO 3 thin films exhibit the reversible bipolar resistive switching behaviors with Pt/BiFeO 3 /LNO configuration. The electrical conduction mechanism of the devices was dominated by the Ohmic conduction in the low resistance state and trap-controlled space charged limited current in the high resistance state. Good diode-like rectification property was observed in device with BiFeO 3 film annealed at 500 °C, but vanished in device with BiFeO 3 film annealed at 600 °C. This was attributed to the asymmetrical contact between top and bottom interfaces as well as the distinct oxygen vacancy density verified by XPS. Furthermore, the modification of Schottky-like barrier due to the drift of oxygen vacancies was suggested to be responsible for the resistance switching behaviors of Pt/BiFeO 3 /LNO devices.

Z-contrast imaging of ordered structures in Pb(Mg1/3Nb2/3)O3 and Ba(Mg1/3Nb2/3)O3

International Nuclear Information System (INIS)

Yan, Y.; Pennycook, S.J.; Xu, Z.; Viehland, D.

1998-02-01

Lead-based cubic perovskites such as Pb(B 1/3 2+ B 2/3 5+ )O 3 (B 2+ Mg, Co, Ni, Zn; B 5+ = Nb, Ta) are relaxor ferroelectrics. Localized order and disorder often occur in materials of this type. In the Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) family, previous studies have proposed two models, space-charge and charge-balance models. In the first model, the ordered regions carry a net negative charge [Pb(Mg 1/2 Nb 1/2 )O 3 ], while in the second model it does not carry a net charge [Pb((Mg 2/3 Nb 1/3 ) 1/2 Nb 1/2 )O 3 ]. However, no direct evidence for these two models has appeared in the literature yet. In this paper the authors report the first direct observations of local ordering in undoped and La-doped Pb(Mg 1/3 Nb 2/3 )O 3 , using high-resolution Z-contrast imaging. Because the ordered structure in Ba(Mg 1/3 Nb 2/3 )O 3 is well known, the Z-contrast image from an ordered domain is used as a reference for this study

GITT studies on oxide cathode LiNi1/3Co1/3Mn1/3O2 synthesized ...

Indian Academy of Sciences (India)

Li diffusion; LiNi1/3Co1/3Mn1/3O2; lithium ion batteries; layered structure. 1. Introduction ... The coin-type cell CR2012 consisting of a metallic- lithium foil anode ... and the polyvinylidenefluoride (PVDF) binder with a mass ratio of 4:1:1 in NMP ...

Tritium aging effect of LaNi5

International Nuclear Information System (INIS)

Xiong Yifu; Li Rong; Luo Deli

2002-01-01

The influence of tritium aging effect on hydrogen storage feature of LaNi 5 were investigated by dedeuterizing thermodynamics and the equilibrium desorption. The result show that the tritium aging effect changed significantly the features of the equilibrium desorption isotherms for the aged LaNi 5 . The effects include a decrease of 50 percent of the equilibrium desorption pressure at 373 K, an increase of plateau slopes from 0.033 to 0.130, and a reduction of the reversible hydrogen storage capacity 1.3 mmol g -1 , and an increase of formation heats (ΔH) and entropy (ΔS) from 34.5 kJ·mol -1 and 105 J·mol -1 ·K -1 to 42.5 kJ·mol -1 and 128 J·mol -1 ·K -1 respectively

Magnetocaloric effect in (La1-xAx)2/3Ba1/3Mn1.05O3-δ

DEFF Research Database (Denmark)

Ancona-Torres, Carlos Eugenio; Menon, Mohan; Bahl, Christian Robert Haffenden

Recently, a large magnetocaloric effect has been reported in La2/3Ba1/3MnO3-δ at about 300 K. In this paper, we investigate the effect of the ion size distribution at the A site on the magnetocaloric effect of this perovskite material. This is accomplished by replacing the lanthanum by Ce, Pr......, and Nd, which allows us to study the effect of both the average size, , and the distribution, σrA, on the magnetic properties of the system. Using magnetization and heat capacity measurements, we determine the important magnetocaloric parameters ΔSM and ΔTad of (La1-xAx)2/3Ba1/3Mn1.05O3-δ powders...

Comparison of reduction agents in the synthesis of infinite-layer LaNiO2 films

Science.gov (United States)

Ikeda, Ai; Manabe, Takaaki; Naito, Michio

2014-11-01

Reduction agents, such as activated carbon, TiH2, and CaH2, were compared from a viewpoint of the facility for the topotactic reduction of LaNiO3 to LaNiO2 films. Activated carbon did not yield infinite-layer LaNiO2 whereas both of TiH2 and CaH2 yielded infinite-layer LaNiO2 with low resistivity (∼1 mΩ cm at 300 K) as well as metallic behavior down to 70 K. Thermal desorption spectroscopy indicated that H2 released from metal hydrides plays a dominant role in the topotactic reduction.

The preparation of 3-aminoxy-1-amino[1,1'-3H2]propane

International Nuclear Information System (INIS)

Pankaskie, M.C.; Scholtz, S.J.

1989-01-01

3-Aminoxy-1-aminopropane (APA) has previously been shown to be a potent inhibitor of the polyamine biosynthesis enzymes ornithine decarboxylase, adenosylmethionine decarboxylase, and spermidine synthase. Little information is known, however, regarding its mechanism of action, binding site mode(s), or cellular distribution. This report presents a relatively simple three step synthesis of 3-aminoxy-1-amino[1,1'- 3 H 2 ]propane via the catalytic tritiation of 3-aminoxypropionitrile hydrochloride. (author)

Synthesis, crystal structure, and spectra of 3,3- dimethyl-1-N-(1'-phenyl-2',3'-dimethyl-5'-oxo-3'- pyrazolin-4'-yl)imino-1,2,3,4-tetrahydroisoquinoline

International Nuclear Information System (INIS)

Sokol, V.I.; Ryabov, M.A.; Merkur'eva, N.Yu.; Davydov, V.V.; Zaitsev, B.E.; Shklyaev, Yu.V.; Sergienko, V.S.; Zaitsev, B.E.

1996-01-01

The synthesis and the crystal and molecular structure of 3,3-dimethyl-1-N-(1'-phenyl-2',3'- dimethyl-5'-oxo-3'-pyrazolin-4'-yl)imino-1,2,3,4-tetrahydroisoquinoline are reported. As is evidenced by the 1H NMR, IR, and electron spectra, the tautomeric form of the compounds observed in the crystal is also retained in solutions

Effect of La-CO substitution on the crystal structure and magnetic properties of low temperature sintered Sr1-xLaxFe12-xCoxO19 (x=0-0.5) ferrites

Science.gov (United States)

Peng, Long; Li, Lezhong; Wang, Rui; Hu, Yun; Tu, Xiaoqiang; Zhong, Xiaoxi

2015-11-01

The La-Co substituted Sr1-xLaxFe12-xCoxO19 (x=0-0.5) ferrites with appropriate Bi2O3 additive were prepared at a low sintering temperature of 890 °C compatible with LTCC (low temperature co-fired ceramics) systems, and the effect of La-Co substitution on their crystal structure and magnetic properties was investigated. The results show that the pure M-type phase is successfully obtained when the La-Co substitution amount x does not exceed 0.3. However, the single M-type phase structure transforms to multiphase structure with further increased x, where the α-Fe2O3 phase and La2O3 phase coexist with the M-type phase. Moreover, the saturation magnetization Ms, magnetic anisotropy field Ha, intrinsic coercivity Hci, and Curie temperature TC of the ferrites depend on the La-Co substitution amount strongly, which are suggested to be determined by the partially substitution of La3+-Co2+ ions for Sr2+-Fe3+ ions with x not higher than 0.3. It is found that the obtained Sr1-xLaxFe12-xCoxO19 (x=0.2 and 0.3) ferrites can provide improved magnetic properties (Ms>62 emu/g, Ha>1400 kA/m, and Hci>320 kA/m) as low temperature sintered M-type hexaferrites for microwave LTCC applications.

(2E-3-(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl-1-(2,5-dimethyl-3-thienylprop-2-en-1-one

Directory of Open Access Journals (Sweden)

Salman A. Khan

2010-04-01

Full Text Available The title compound, (2E-3-(3,5-dimethyl-1-phenyl-1H-pyrazol-4-yl-1-(2,5-dimethyl-3-thienylprop-2-en-1-one (3 was synthesized in high yield by aldol condensation of 3-acetyl-2,5-dimethylthiophene and 3,5-dimethyl-1-phenylpyrazole-4-carboxaldehyde in ethanolic NaOH at room temperature. Its structure was fully characterized by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral analysis.

Influence of Mn site doping on electrical resistivity of polycrystalline La1-yAyMn1-xBxO3 (A=Ba, Sr; B=Cu, Cr, Co Manganites

Directory of Open Access Journals (Sweden)

Paunović N.

2008-01-01

Full Text Available We have the measured electrical resistivity of La1-yBayMn1-xCuxO3 (0.17≤y≤0.30; 0.04≤x≤0.10, La1-ySryMn1-xCrxO3 and La1-ySryMn1-xCoxO3 (0.270≤y≤0.294; 0.02≤x≤0.10 polycrystalline samples in the 25-325 K temperature range. The increase of Mn site doping concentration leads to an increase of the electrical resistivity of the samples and the appearance of a “double-peak” structure in the electrical resistivity versus temperature graphs. The first peak represents the insulator-metal transition in vicinity of the paramagnetic-ferromagnetic transition (TC. We have found that the intensity of the second peak increases with an increase of concentration of Mn substituents, due to the hole scattering by the random potential of the Mn site impurities.

Energy-storage properties and electrocaloric effect of Pb(1-3x/2)LaxZr0.85Ti0.15O3 antiferroelectric thick films.

Science.gov (United States)

Zhao, Ye; Hao, Xihong; Zhang, Qi

2014-07-23

Antiferroelectric (AFE) thick (1 μm) films of Pb(1-3x/2)LaxZr0.85Ti0.15O3 (PLZT) with x = 0.08, 0.10, 0.12, and 0.14 were deposited on LaNiO3/Si (100) substrates by a sol-gel method. The dielectric properties, energy-storage performance, electrocaloric effect, and leakage current behavior were investigated in detail. With increasing La content, dielectric constant and saturated polarizations of the thick films were gradually decreased. A maximum recoverable energy-storage density of 38 J/cm(3) and efficiency of 71% were achieved in the thick films with x = 0.12 at room temperature. A large reversible adiabatic temperature change of ΔT = 25.0 °C was presented in the thick films with x = 0.08 at 127 °C at 990 kV/cm. Moreover, all the samples had a lower leakage current density below 10(-6) A/cm(2) at room temperature. These results indicated that the PLZT AFE thick films could be a potential candidate for applications in high energy-storage density capacitors and cooling devices.

Effect of Fe substitution on magnetocaloric effect in La0.7Sr0.3Mn1-xFexO3 (0.05≤x≤0.20)

International Nuclear Information System (INIS)

Barik, S.K.; Krishnamoorthi, C.; Mahendiran, R.

2011-01-01

We have studied the effect of Fe substitution on magnetic and magnetocaloric properties in La 0.7 Sr 0.3 Mn 1-x Fe x O 3 (x=0.05, 0.07, 0.10, 0.15, and 0.20) over a wide temperature range (T=10-400 K). It is shown that substitution by Fe gradually decreases the ferromagnetic Curie temperature (T C ) and saturation magnetization up to x=0.15 but a dramatic change occurs for x=0.2. The x=0.2 sample can be considered as a phase separated compound in which both short-range ordered ferromagnetic and antiferromagnetic phases coexist. The magnetic entropy change (-ΔS m ) was estimated from isothermal magnetization curves and it decreases with increase of Fe content from 4.4 J kg -1 K -1 at 343 K (x=0.05) to 1.3 J kg -1 K -1 at 105 K (x=0.2), under ΔH=5 T. The La 0.7 Sr 0.3 Mn 0.93 Fe 0.07 O 3 sample shows negligible hysteresis loss, operating temperature range over 60 K around room temperature with refrigerant capacity of 225 J kg -1 , and magnetic entropy of 4 J kg -1 K -1 which will be an interesting compound for application in room temperature refrigeration. - Research highlights: → We report magnetocaloric effect in La 0.7 Sr 0.3 Mn 1-x Fe x O 3 (x=0-0.2). → Magnetic entropy change (ΔS m ) decreases with increasing x. → A large ΔS m and refrigeration capacity are found around 300 K in x=0.07.

Synthesis of the water soluble ligands dmPTA and dmoPTA and the complex [RuClCp(HdmoPTA)(PPh(3))](OSO(2)CF(3)) (dmPTA = N,N'-Dimethyl-1,3,5-triaza-7-phosphaadamantane, dmoPTA = 3,7-Dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane, HdmoPTA = 3,7-H-3,7-Dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane).

Science.gov (United States)

Mena-Cruz, Adrian; Lorenzo-Luis, Pablo; Romerosa, Antonio; Saoud, Mustapha; Serrano-Ruiz, Manuel

2007-07-23

The new water-soluble ligand dmPTA(OSO(2)CF(3))(2) (1) (dmPTA = N,N'-dimethyl-1,3,5-triaza-7-phosphaadamantane) has been synthesized by reaction of PTA with MeOSO(2)CF(3) in acetone (PTA = 1,3,5-triaza-7-phosphatricycle[3.3.1.1(3,7)]decane). The reaction of 1 with KOH gave rise to the new water-soluble ligand dmoPTA (3) (dmoPTA = 3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane) by elimination of the -CH(2)- group located between both NCH(3) units. Compound dmPTA(BF(4))(2) (2) and complex [RuClCp(HdmoPTA)(PPh(3))](OSO(2)CF(3)) (4) have also been synthesized, while compounds HdmoPTA(BF(4)) (3a) and [RuClCp(dmPTA)(PPh(3))](OSO(2)CF(3)) (5) were characterized but not isolated. The new ligands and the complex have been fully characterized by NMR, IR, elemental analysis, and X-ray crystal structure determination (ligand 1 and complex 4). The synthetic processes for 3 and 4 were studied.

Processing of water-based LiNi1/3Mn1/3Co1/3O2 pastes for ...

Indian Academy of Sciences (India)

Results show that a substitution of the conventional organic solvent-based manufacturing route for LiNi1/3Mn1/3Co1/3O2 cathodes by water-based processing exhibits a promising way to realise Li-ion batteries with comparable electrochemical behaviour, while avoiding toxic processing aids and reducing overall ...

Four experimental stimulants found in sports and weight loss supplements: 2-amino-6-methylheptane (octodrine), 1,4-dimethylamylamine (1,4-DMAA), 1,3-dimethylamylamine (1,3-DMAA) and 1,3-dimethylbutylamine (1,3-DMBA).

Science.gov (United States)

Cohen, Pieter A; Travis, John C; Keizers, Peter H J; Deuster, Patricia; Venhuis, Bastiaan J

2017-11-08

The United States Food and Drug Administration banned the stimulant 1,3-dimethylamylamine (1,3-DMAA) from dietary supplements and warned consumers that the stimulant can pose cardiovascular risks ranging from high blood pressure to heart attacks. We designed our study to determine if a new stimulant similar in structure to 1,3-DMAA has been introduced as an ingredient in supplements sold in the United States (US). We analyzed six brands of supplements that listed an ingredient on the label (e.g., Aconitum kusnezoffii, DMHA or 2-amino-isoheptane) that might refer to an analog of 1,3-DMAA. Supplements were analyzed by two separate laboratories using ultra-high-performance liquid chromatography mass spectrometry and reference standards. Two previously unidentified 1,3-DMAA analogs (2-amino-6-methylheptane [octodrine] and 1,4-dimethylamylamine [1,4-DMAA]) and two banned stimulants (1,3-DMAA and 1,3-dimethylbutylamine [1,3-DMBA]) were identified. Octodrine was found at a dose (±95% CI) of 72 ± 7.5 mg per serving. In Europe, octodrine was previously sold as a pharmaceutical in multi-ingredient medications at dosages from 8 to 33 mg. The quantity of octodrine found in our study was more than twice the largest pharmaceutical dose. The other new stimulant, 1,4-DMAA, has not previously been approved for human consumption, and its safety in humans is unknown. 1,4-DMAA was found at dosages between 21 ± 11 mg to 94 ± 48 mg per serving. In addition, two banned stimulants - 1,3-DMAA and 1,3-DMBA - were also identified: 24 ± 7.6 mg to 35 ± 11 mg of 1,3-DMAA and 51 ± 16 mg of 1,3-DMBA. In one product, 24 ± 7.6 mg of 1,3-DMAA was combined with 21 ± 11 mg of 1,4-DMAA. 1,3-DMAA has been investigated as potentially contributing to hemorrhagic strokes and sudden death, whereas the safety of 1,3-DMBA in humans is unknown. Two banned stimulants (1,3-DMAA and 1,3-DMBA) and two previously unidentified stimulants (1,4-DMAA and

1,3-Diphenyl-3,4-dihydrobenzo[b][1,6]naphthyridine

Directory of Open Access Journals (Sweden)

Werner Seebacher

2010-05-01

Full Text Available The title compound, C24H18N2, is the first structural example containing the 3,4-dihydrobenzo[b][1,6]naphthyridine fragment. It was synthesized from 2,4,6,8-tetraphenyl-3,7-diazabicyclo[3.3.1]nonan-9-one and was crystallized from a methanol–ethanol solution over two years as a racemate. The C=N double bond [1.2868 (15 Å] is bent significantly out of the plane of the aromatic bicyclic ring system [N—C—C—C = −157.63 (12°] and out of the plane of the phenyl ring bonded at the 1-position [N—C—C—C = 41.15 (16°].

GITT studies on oxide cathode LiNi1/3Co1/3Mn1/3O2 synthesized ...

Indian Academy of Sciences (India)

2016-08-26

Aug 26, 2016 ... GITT studies on oxide cathode LiNi1/3Co1/3Mn1/3O2 synthesized by citric acid assisted high-energy ball milling ... The State Key Laboratory Base of Novel Functional Materials and Preparation Science; The Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. ...

Influence of tritium aging on kinetics feature of LaNi4.9Al0.1

International Nuclear Information System (INIS)

Xiong Yifu; Luo Deli; Li Rong

2001-01-01

Kinetics parameters were measured at different aging time on LaNi 4.9 Al 0.1 alloy. The influence of tritium aging on kinetics feature of LaNi 4.9 Al 0.1 alloy was assessed. The results show that tritium aging does not change deuterating-dedeuterating reaction order. Reaction rate decrease with aging time. Activation energy (E) increases with aging time

Preparation of layered oxide Li(Co1/3Ni1/3Mn1/3)O2 via the sol-gel process

Institute of Scientific and Technical Information of China (English)

ZHANG Wen; LIU Hanxing; HU Chen; ZHU Xianjun; LI Yanxi

2008-01-01

To obtain homogenous layered oxide Li(Co1/3Ni1/3Ni1/3Mn1/3)O2 as a lithium insertion positive electrode material,the sol-gel process using citric acid as a chelating agent was applied.The material Li(Co1/3,Ni1/3Mn1/3)O2 was synthesized at different calcination temperatures.XRD experiment indicated that the hyered Li(Co1/3Ni1/3Mn1/3)O2material could he synthesized at a lower temperature of 800℃,and the oxidation state of Co,Ni,and Mn in the cathode confirmed by XPS were +3,+2,and +4,respectively.SEM observations showed that the synthesized material could form homogenous particle morphology with the particle size of about 200nm In spite of different calcination temperatures,the charge-discharge curves of all the samples for the initial cycle were similar,and the cathode synthesized at 900℃ showed a small irreversible capacity loss of 11.24% and a high discharge capacity of 212.2 mAh.g-1 in the voltage range of 2.9-4.6 V.

Crystal structures of 2,2′-bipyridin-1-ium 1,1,3,3-tetracyano-2-ethoxyprop-2-en-1-ide and bis(2,2′-bipyridin-1-ium 1,1,3,3-tetracyano-2-(dicyanomethylenepropane-1,3-diide

Directory of Open Access Journals (Sweden)

Zouaoui Setifi

2015-05-01

Full Text Available In 2,2′-bipyridin-1-ium 1,1,3,3-tetracyano-2-ethoxyprop-2-en-1-ide, C10H9N2+·C9H5N4O−, (I, the ethyl group in the anion is disordered over two sets of atomic sites with occupancies 0.634 (9 and 0.366 (9, and the dihedral angle between the ring planes in the cation is 2.11 (7°. The two independent C(CN2 groups in the anion make dihedral angles of 10.60 (6 and 12.44 (4° with the central propenide unit, and the bond distances in the anion provide evidence for extensive electronic delocalization. In bis(2,2′-bipyridin-1-ium 1,1,3,3-tetracyano-2-(dicyanomethylenepropane-1,3-diide [alternative name bis(2,2′-bipyridin-1-ium tris(dicyanomethylenemethanediide], 2C10H9N2+·C10N62− (II, the dihedral angles between the ring planes in the two independent cations are 7.7 (2 and 10.92 (17°. The anion exhibits approximate C3 symmetry, consistent with extensive electronic delocalization, and the three independent C(CN2 groups make dihedral angles of 23.8 (2, 27.0 (3 and 27.4 (2° with the central plane. The ions in (I are linked by an N—H...N hydrogen bond and the resulting ion pairs are linked by two independent C—H...N hydrogen bonds, forming a ribbon containing alternating R44(18 and R44(26 rings, where both ring types are centrosymmetric. The ions in (II are linked by two independent N—H...N hydrogen bonds and the resulting ion triplets are linked by a C—H...N hydrogen bond, forming a C21(7 chain containing anions and only one type of cation, with the other cation linked to the chain by a further C—H...N hydrogen bond.

Neutron diffraction studies on cobalt substituted BiFeO3

Science.gov (United States)

Ray, J.; Biswal, A. K.; Acharya, S.; Babu, P. D.; Siruguri, V.; Vishwakarma, P. N.

2013-02-01

A dilute concentration of single phase Cobalt substituted Bismuth ferrite, BiFe1-XCoXO3; (x=0, 0.02) is prepared by sol-gel auto combustion method. Room temperature neutron diffraction patterns show no change in the crystal and magnetic structure upon cobalt doping. The calculation of magnetic moments shows 3.848 μB for Fe+ and 2.85 μB for Co3+. The cobalt is found to be in intermediate spin state.

2-[(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-ylmethylene]indane-1,3-dione

Directory of Open Access Journals (Sweden)

Abdullah M. Asiri

2011-02-01

Full Text Available The title compound 2-[(3,5-dimethyl-1-phenyl-1H-pyrazol-4-ylmethylene]-indane-1,3-dione (3 was synthesized in high yield by reaction of 3,5-dimethyl-1-phenyl-pyrazole-4-carbaldehyde and indane-1,3-dione in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and GC-MS spectral analysis.

MCNP4c JEFF-3.1 Based Libraries. Eccolib-Jeff-3.1 libraries; Les bibliotheques Eccolib-Jeff-3.1

Energy Technology Data Exchange (ETDEWEB)

Sublet, J.Ch

2006-07-01

Continuous-energy and multi-temperatures MCNP Ace types libraries, derived from the Joint European Fusion-Fission JEFF-3.1 evaluations, have been generated using the NJOY-99.111 processing code system. They include the continuous-energy neutron JEFF-3.1/General Purpose, JEFF-3.1/Activation-Dosimetry and thermal S({alpha},{beta}) JEFF-3.1/Thermal libraries and data tables. The processing steps and features are explained together with the Quality Assurance processes and records linked to the generation of such multipurpose libraries. (author)

5-[(3-Fluorophenyl(2-hydroxy-6-oxocyclohex-1-en-1-ylmethyl]-6-hydroxy-1,3-dimethylpyrimidine-2,4(1H,3H-dione

Directory of Open Access Journals (Sweden)

Assem Barakat

2016-09-01

Full Text Available 5-[(3-Fluorophenyl(2-hydroxy-6-oxocyclohex-1-en-1-yl-methyl]-6-hydroxy-1,3-di-methylpyrimidine-2,4(1H,3H-dione 3 was synthesized via a multicomponent reaction. The Aldol–Michael addition reactions of N,N-dimethylbarbituric acid, cyclohexane-1,3-dione, and 3-fluorobenzaldehyde in aqueous solution gave the product in high yield. The molecular structure of the compound was confirmed by spectroscopic methods and X-ray crystallography. The title compound (C19H19FN2O5·H2O crystallizes in the Monoclinic form, P21/c, a = 7.8630 (5 Å, b = 20.0308 (13 Å, c = 11.3987 (8 Å, β = 104.274 (3°, V = 1739.9 (2° Å3, Z = 4, Rint = 0.117, wR(F2 = 0.124, T = 100 K.

Thermodynamic study of 1,2,3-triphenylbenzene and 1,3,5-triphenylbenzene

International Nuclear Information System (INIS)

Ribeiro da Silva, Manuel A.V.; Santos, Luis M.N.B.F.; Lima, Luis M. Spencer S.

2010-01-01

The energetic study of 1,2,3-triphenylbenzene (1,2,3-TPhB) and 1,3,5-triphenylbenzene (1,3,5-TPhB) isomers was carried out by making use of the mini-bomb combustion calorimetry and Knudsen mass-loss effusion techniques. The mini-bomb combustion calorimetry technique was used to derive the standard (p o = 0.1 MPa) molar enthalpies of formation in the crystalline state from the measured standard molar energies of combustion for both isomers. The Knudsen mass-loss effusion technique was used to measure the dependence with the temperature of the vapour pressure of crystalline 1,2,3-TPhB, which allowed the derivation of the standard molar enthalpy of sublimation, by application of the Clausius-Clapeyron equation. The sublimation study of 1,3,5-TPhB had been performed previously. From the combination of data obtained by both techniques, the standard molar enthalpies of formation in the gaseous state, for both isomers, at T = 298.15 K, were calculated. The results indicate a higher stability of the 1,3,5-TPhB isomer relative to 1,2,3-TPhB, similarly to the terphenyls. Nevertheless, the 1,2,3-TPhB isomer is not as energetically destabilized as one might expect, supporting the existence of a π-π displacive stacking interaction between both pairs of outer phenyl rings. The volatility difference between the two isomers is ruled by the enthalpy of sublimation. The volatility of the 1,2,3-TPhB is two orders of magnitude higher than the 1,3,5-TPhB isomer, at T = 298.15 K.

Fragrance material review on 1-(3,3-dimethylcyclohexyl)ethan-1-one.

Science.gov (United States)

Scognamiglio, J; Letizia, C S; Api, A M

2013-12-01

A Toxicologic and Dermatologic review of 1-(3,3-dimethylcyclohexyl)ethan-1-one when used as a fragrance ingredient is presented. 1-(3,3-Dimethylcyclohexyl)ethan-1-one is a member of the fragrance structural group Alkyl Cyclic Ketones. These fragrances can be described as being composed of an alkyl, R1, and various substituted and bicyclic saturated or unsaturated cyclic hydrocarbons, R2, in which one of the rings may include up to 12 carbons. Alternatively, R2 may be a carbon bridge of C2-C4 carbon chain length between the ketone and cyclic hydrocarbon. This review contains a detailed summary of all available toxicology and dermatology papers that are related to this individual fragrance ingredient and is not intended as a stand-alone document. Available data for 1-(3,3-dimethylcyclohexyl)ethan-1-one were evaluated then summarized and includes physical properties, skin irritation, mucous membrane (eye) irritation, skin sensitization, and genotoxicity data. A safety assessment of the entire Alkyl Cyclic Ketones will be published simultaneously with this document; please refer to Belsito et al., 2013(1) for an overall assessment of the safe use of this material and all Alkyl Cyclic Ketones in fragrances. Copyright © 2013 Elsevier Ltd. All rights reserved.

LaNiO3 buffer layers for high critical current density YBa2Cu3O7-δ and Tl2Ba2CaCu2O8-δ films

International Nuclear Information System (INIS)

Carlson, C.M.; Parilla, P.A.; Siegal, M.P.; Ginley, D.S.; Wang, Y.; Blaugher, R.D.; Price, J.C.; Overmyer, D.L.; Venturini, E.L.

1999-01-01

We demonstrate high critical current density superconducting films of YBa 2 Cu 3 O 7-δ (YBCO) and Tl 2 Ba 2 CaCu 2 O 8-δ (Tl-2212) using LaNiO 3 (LNO) buffer layers. YBCO films grown on an LNO buffer layer have only a slightly lower J c (5 K, H=0) than films grown directly on a bare LaAlO 3 substrate. YBCO films grown on LNO buffer layers exhibit minor microstructural disorder and enhanced flux pinning. LNO-buffered Tl-2212 samples show large reductions in J c at all temperatures and fields compared to those grown on bare LaAlO 3 , correlating to both a-axis grain and nonsuperconducting phase formation. LNO could be a promising buffer layer for both YBCO and Tl-based superconducting films in coated conductor applications. copyright 1999 American Institute of Physics

LaNiO3 Buffer Layers for High Critical Current Density YBa2Cu3O7δ and Tl2Ba2CaCu2O8δ Films

International Nuclear Information System (INIS)

Carlson, C.M.; Parilla, P.A.; Siegal, M.P.; Ginley, D.S.; Wang, Y.-T.; Blaugher, R.D.; Price, J.C.; Overmyer, D.L.; Venturini, E.L.

1999-01-01

We demonstrate high critical current density superconducting films of YBa 2 Cu 3 O 7-δ (YBCO) and Tl 2 Ba 2 CaCu 2 O 8-δ (Tl-2212) using LaNiO 3 (LNO) buffer layers. YBCO films grown on an LNO buffer layer have only a slightly lower J c (5K, H=0) than films grown directly on a bare LaAlO 3 substrate. It is noteworthy that YBCO films grown on LNO buffer layers exhibit minor microstructural disorder and enhanced flux pinning. LNO-buffered Tl-2212 samples show large reductions in J c at all temperatures and fields compared to those grown on bare LaAlO 3 , correlating to both a-axis grain and nonsuperconducting phase formation. With additional optimization, LNO could be a promising buffer layer for both YBCO and Tl-based superconducting films, perhaps ideally suited for coated conductor applications

Investigations on the nitrogen storage property of LaNi5 powder

International Nuclear Information System (INIS)

Ishikawa, F.N.; Yamasue, E.; Okumura, H.; Ishihara, K.N.

2011-01-01

The nitrogen absorption and desorption property of LaNi 5 was investigated using NH 3 and N 2 as nitrogen sources. It was found that both as purchased and milling processed LaNi 5 powder can absorb and desorb nitrogen using NH 3 as the nitrogen source, while milled LaNi 5 powder can absorb and desorb more. XRD, cross sectional SEM and EPMA were performed to elucidate the nitrogen stored phases. When N 2 gas was used as the nitrogen source, it was found that the amount of absorbed nitrogen significantly decreased. By using high pressure for the absorption treatment or performing an activation treatment using hydrogen absorption/desorption before the nitrogen absorption treatment, milled LaNi 5 was found to absorb nitrogen of 0.1 mol/mol Finally, the mechanism of the nitrogen absorption was discussed from the EPMA and kinetic data of the nitrogen absorption, and it was suggested that the mechanism of the nitrogen absorption might be explained by a combined model of a diffusion controlled process and an interface controlled process.

Unimolecular reactions of 1,1,1-trichloroethane, 1,1,1-trichloropropane, and 3,3,3-trifluoro-1,1,1-trichloropropane: determination of threshold energies by chemical activation.

Science.gov (United States)

Turpin, Martha A; Smith, Kylie C; Heard, George L; Setser, D W; Holmes, Bert E

2014-10-09

The recombination of CCl3 radicals with CH3, CH3CH2, and CF3CH2 radicals was used to generate CH3CCl3, CH3CH2CCl3, and CF3CH2CCl3 molecules with approximately 87 kcal mol(-1) of vibrational energy in a bath gas at room temperature. The competition between collisional deactivation and unimolecular reaction by HCl elimination was used to obtain the experimental rate constants for each molecule. These experimental rate constants were matched to calculated statistical unimolecular rate constants to assign threshold energies to the three HCl elimination reactions. The models needed for the calculations of the rate constants were obtained from molecular structure calculations using density functional theory (DFT) with the hybrid density-functional MO6-2X recommended by Truhlar for transition states. The assigned threshold energies are 52 ± 2, 50 ± 2, and 52 ± 2 kcal mol(-1) for CH3CCl3, CH3CH2CCl3, and CF3CH2CCl3, respectively, and the CH3 and CF3 groups have only a minor effect on the threshold energies for HCl elimination. The DFT calculated threshold energies are in agreement with the experimentally assigned values. The addition of Cl atoms to the same carbon atom lowers the threshold energy for HCl elimination in the CH3CH2Cl, CH3CHCl2, and CH3CCl3 series. This trend, which is the opposite of that for CH3CH2F, CH3CHF2, and CH3CF3, is discussed in terms of transition-state structure and correlated with the relative stabilities of CH3CH2(+), CH3CHCl(+), and CH3CCl2(+) ions; the relative stabilities are based on the hydride affinities obtained from calculations. Comparison of the reactions of CH3CCl3 and CH2ClCHCl2 shows that the threshold energy is much higher for the isomer with chlorine atoms on both carbon atoms.

Synthesis, characterization, antioxidant and brine shrimp cytotoxic activity of novel 3-benzothioyl-1-(3-hydroxy-3-phenyl -3-propyl)-1-methylthiourea.

Science.gov (United States)

Shoaib, Mohammad; Ullah, Abid; Shah, Syed Wadood Ali; Tahir, Muhammad Nawaz

2017-07-01

In the present research work novel ephedrine based thiourea derivative, 3-benzothioyl-1-(3-hydroxy-3-phenyl -3-propyl)-1-methylthiourea 4is synthesized and then characterized elemental analyzed via various techniques i.e., Proton NMR, carbon13 NMR and fatherly confirmed via X-ray crystallography. Compound 4 was then screened for their possible antioxidant and cytotoxic potentials. Benzoyl chloride was treated with an equimolar potassium thiocyanate in acetone to achieve benzoyl isothiocyantes. It was then treated with an equimolar (1R, 2S)-(-)-Ephedrine to obtain the 3-benzothioyl-1-(3-hydroxy-3-phenyl-3-propyl)-1-methyl thiourea4. It was then screened for antioxidant and cytotoxic potentials. The compound 4 showed excellent antioxidant activity almost comparable to ascorbic acid (standard) and have significant cytotoxic activity with LC 50 value 05±0.58 ppm.

Layered oxides-LiNi1/3Co1/3Mn1/3O2 as anode electrode for symmetric rechargeable lithium-ion batteries

Science.gov (United States)

Wang, Yuesheng; Feng, Zimin; Yang, Shi-Ze; Gagnon, Catherine; Gariépy, Vincent; Laul, Dharminder; Zhu, Wen; Veillette, René; Trudeau, Michel L.; Guerfi, Abdelbast; Zaghib, Karim

2018-02-01

High-performance and long-cycling rechargeable lithium-ion batteries have been in steadily increasing demand for the past decades. Nevertheless, the two dominant anodes at the moment, graphite and L4T5O12, suffer from a safety issue of lithium plating (operating voltage at ∼ 0.1 V vs. Li+/Li) and low capacity (175 mAh/g), respectively. Here, we report LiNi1/3Co1/3Mn1/3O2 as an alternative anode material which has a working voltage of ∼1.1 V and a capacity as high as 330 mAh/g at the current rate of C/15. Symmetric cells with both electrodes containing LiNi1/3Co1/3Mn1/3O2 can deliver average discharge voltage of 2.2 V. In-situ XRD, HRTEM and first principles calculations indicate that the reaction mechanism of a LiNi1/3Co1/3Mn1/3O2 anode is comprised mainly of conversion. Both the fundamental understanding and practical demonstrations suggest that LiNi1/3Co1/3Mn1/3O2 is a promising negative electrode material for lithium-ion batteries.

1,1,3,3-Tetramethylguanidine solvated lanthanide aryloxides: pre-catalysts for intramolecular hydroalkoxylation.

Science.gov (United States)

Janini, Thomas E; Rakosi, Robert; Durr, Christopher B; Bertke, Jeffrey A; Bunge, Scott D

2009-12-21

The synthesis and structural characterization of six 1,1,3,3-tetramethylguanidine (H-TMG) solvated lanthanide aryloxide complexes are reported. Ln[N{Si(CH3)3}2]3 (Ln = Nd, La) was reacted with two equivalents of both H-TMG and HOAr {HOAr = HOC6H2(CMe3)2-2,6 (H-DBP) or HOC6H2(CMe3)2-2,6-CH3-4 (H-4MeDBP)} and one equivelent of ethanol (HOEt) to yield the corresponding [Nd(H-TMG)2(4MeDBP)2(OEt)] (1) and [La(H-TMG)2(DBP)2(OEt)] (2). Compounds 1 and 2 were further reacted with 4-pentyn-1-ol {HO(CH2)3C[triple bond]CH} to isolate [Nd(H-TMG)2(4MeDBP)2{O(CH2)3C[triple bond]CH}] (3) and [La(H-TMG)2(DBP)2{O(CH2)3C[triple bond]CH}] (4), respectively. Three equivalents of HOAr and one equivalent of H-TMG were additionally reacted with Ln[N{Si(CH3)3}2]3 to generate [Nd(4MeDBP)3(H-TMG)] (5) and [La(DBP)3(H-TMG)] (6). In order to examine the formation of 1-6, the interaction of H-TMG and HOAr was further examined in solution and the hydrogen bonded complexes (H-TMG:HOAr), 7 and 8, were isolated. Upon successful isolation of 1-6, the utility of 1, 2, 4 and 5 as pre-catalysts for the intramolecular hydroalkoxylation of 4-pentyn-1-ol was investigated. The bulk powders for all complexes were found to be in agreement with the crystal structures based on elemental analyses, FT-IR spectroscopy, and 1H and 13C NMR investigations.

3-[2-(1,3-Benzothiazol-2-ylsulfanylethyl]-1,3-oxazolidin-2-one

Directory of Open Access Journals (Sweden)

Yong-Hong Wen

2010-10-01

Full Text Available The title compound, C12H12N2S2O2, consists of a benzothiazole group and a oxazolidin-1-one linked via a flexible ethane-1,2-diyl spacer. The benzothiazole group and the oxazolidine ring are each almost planar [with maximum deviations of 0.007 (2 and 0.044 (3 Å, respectively] and make a dihedral angle of 9.35 (10°. In the crystal structure, adjacent molecules were connected through C—H...O and C—H...N hydrogen bonds, and further extended into a three-dimensional network structure through intermolecular aromatic π–π stacking interactions in which the centroid–centroid distance is 3.590 (1 Å.

Synthesis and characterization of "1"3C_3-tristearin

International Nuclear Information System (INIS)

Wu Hangyu; Lin Lin; Li Lei; Chen Dazhou

2011-01-01

A highly efficient synthesis of "1"3C_3 labeled triglycerides of stearic acids from "1"3C_3-glycerol and stearic acids, by immobilized lipase-catalyzed in solvent-free medium was described. The structure of the product were characterized by fourier transform infrared spectrum (FT-IR), nuclear magnetic resonance (NMR), mass spectra (MS). The results showed that triglycerides of stearic acids contained three "1"3C atoms. The isotope abundance of "1"3C_3-tristearin was more than 99% and the yield was 80% of "1"3C_3-tristearin through calculation. Chemical purity (> 98%) was obtained by differential scanning calorimetry (DSC). (authors)

1-(Ferrocen-1-ylmethyl-3-methylimidazol-3-ium iodide

Directory of Open Access Journals (Sweden)

Vincent O. Nyamori

2012-12-01

Full Text Available The structure of the title compound, [Fe(C5H5(C10H12N2]I, consists of a 1-(ferrocen-1-ylmethyl-3-methylimidazolium cation which is counter-balanced by an iodide anion. The cyclopentadienyl (Cp rings of the ferrocene unit have a slightly staggered conformation skewed from an ideal eclipsed conformation by an angle of 3.5 (6°. The interplanar angle between the Cp and the imidazole ring is 67.94 (2°.

Enhancement of electrochemical performance of LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 by surface modification with MnO_2

International Nuclear Information System (INIS)

Guo, Xin; Cong, Li-Na; Zhao, Qin; Tai, Ling-Hua; Wu, Xing-Long; Zhang, Jing-Ping; Wang, Rong-Shun; Xie, Hai-Ming; Sun, Li-Qun

2015-01-01

LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 is successfully coated with MnO_2 by a chemical deposition method. The X-ray diffraction (XRD), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM) results demonstrate that MnO_2 forms a thin layer on the surface of LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 without destroying the crystal structure of the core material. Compared with pristine LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2, the MnO_2-coated sample shows enhanced electrochemical performance especially the rate capability. Even at a current density of 750 mA g"−"1, the discharge capacity of MnO_2-coated LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 is 155.15 mAh g"−"1, while that of the pristine electrode is only 132.84 mAh g"−"1 in the range of 2.5–4.5 V. The cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) curves show that the MnO_2 coating layer reacts with Li"+ during cycling, which is responsible for the higher discharge capacity of MnO_2-coated LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2. Electrochemical impedance spectroscopy (EIS) results confirmed that the MnO_2 coating layer plays an important role in reducing the charge transfer resistance on the electrolyte–electrode interfaces. - Highlights: • MnO_2 coated LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 cathode material is synthesized for the first time. • MnO_2 offers available sites for insertion of extracted lithium. • The preserved surface and crystal structures results in the improved kinetics.

Synthesis of aryl-1H-1,2,3-triazoles via 1,3-dipolar cycloaddition

Directory of Open Access Journals (Sweden)

Wagner O. Valença

2012-06-01

Full Text Available A series of Aryl-1H-1,2,3-triazoles were prepared from the reaction between aril-azide (1 with 1.5 equiv. of terminal alkynes (2a-o. The reactions carried out at room temperature and in the presence of CuI (10 mol% in acetonitrile. The compounds (3a-o were obtained in moderate-to-good yields (50-94%. In general, not was observed significant inductive effect on the reactivity of the alkynes (2a-f. The alcohol alkynes (2i-k showed moderate yields 50-72%. On the other hand, the reaction with alkyl alkynes (2m,n furnished the compounds (3m and (3n in excellent yields of 89% and 90%, respectively.

Magnetic Properties of La0.9Ag0.1(Mn1-xCoxO3 under Pressure

Directory of Open Access Journals (Sweden)

Mihalik M.

2013-01-01

Full Text Available In our paper we report on magnetic properties of La0.90Ag0.10(CoxMn1-xO3 ferromagnetic ceramics (x = 0.00 and0.03 which were studied in pressures up to 0.9 GPa. Magnetic transition at the Curie temperature TC is accompanied with metal insulator transition with a maximum at T* which is shifted to lower temperature with applied magnetic field. The Curie temperature is decreasing with substitution of Co for Mn and is ranging from 178 K to 126.5 K. Hydrostatic pressure increases TC for sample with x = 0.03 nearly linearly with the pressure coefficient dTc/dp = 5.7 K/GPa. Hysteresis loop is affected marginally; µs increases and Hc decreases with pressure.

Structural and thermal stabilities of layered Li(Ni 1/3Co 1/3Mn 1/3)O 2 materials in 18650 high power batteries

Science.gov (United States)

He, Yan-Bing; Ning, Feng; Yang, Quan-Hong; Song, Quan-Sheng; Li, Baohua; Su, Fangyuan; Du, Hongda; Tang, Zhi-Yuan; Kang, Feiyu

The structural and thermal stabilities of the layered Li(Ni 1/3Co 1/3Mn 1/3)O 2 cathode materials under high rate cycling and abusive conditions are investigated using the commercial 18650 Li(Ni 1/3Co 1/3Mn 1/3)O 2/graphite high power batteries. The Li(Ni 1/3Co 1/3Mn 1/3)O 2 materials maintain their layered structure even when the power batteries are subjected to 200 cycles with 10 C discharge rate at temperatures of 25 and 50 °C, whereas their microstructure undergoes obvious distortion, which leads to the relatively poor cycling performance of power batteries at high charge/discharge rates and working temperature. Under abusive conditions, the increase in the battery temperature during overcharge is attributed to both the reactions of electrolyte solvents with overcharged graphite anode and Li(Ni 1/3Co 1/3Mn 1/3)O 2 cathode and the Joule heat that results from the great increase in the total resistance (R cell) of batteries. The reactions of fully charged Li(Ni 1/3Co 1/3Mn 1/3)O 2 cathodes and graphite anodes with electrolyte cannot be activated during short current test in the fully charged batteries. However, these reactions occur at around 140 °C in the fully charged batteries during oven test, which is much lower than the temperature of about 240 °C required for the reactions outside batteries.

Measurement of the spin-forbidden decay rate (3s3d)1D2¿(3s3p)3 P2,1 in 24Mg

DEFF Research Database (Denmark)

Therkildsen, K. T.; Jensen, Brian Bak; Ryder, C. P.

2009-01-01

We have measured the spin-forbidden decay rate from (3s3d)D12¿(3s3p)P32,1 in M24g atoms trapped in a magneto-optical trap. The total decay rate, summing up both exit channels (3s3p)P31 and (3s3p)P32 , yields 196±10s-1 in excellent agreement with resent relativistic many-body calculations of Porse...

Structural and electrical properties of (1-x)(Na1/2Bi1/2)TiO3-xPb(Mg1/3Nb2/3)O3 solid solution

International Nuclear Information System (INIS)

Lee, J.-K.; Yi, J.Y.; Hong, K.S.

2004-01-01

Structural, dielectric and piezoelectric properties of (1-x)(Na 1/2 Bi 1/2 )TiO 3 -xPb(Mg 1/3 Nb 2/3 )O 3 (NBT-xPMN) solid solution have been investigated. An addition of PMN into NBT transformed the structure of sintered samples from rhombohedral to pseudocubic phase where x is larger than 0.1. In calcined powders, however, the intermediate structure were observed between rhombohedral and cubic phases near x=0.1. The formation of solid solution between NBT and PMN modified the dielectric and piezoelectric properties of NBT to be suitable for high temperature dielectric and piezoelectric material. With increasing the content of PMN, the temperature-stability of ε r (T) increased and the high temperature dielectric loss decreased. In addition, the piezoelectric property of NBT-xPMN was enhanced, for the decrease of coercive field and conductivity promoted the domain reversal under the high electric field of the poling process

Hydrothermal synthesis of layered Li[Ni1/3Co1/3Mn1/3]O2 as positive electrode material for lithium secondary battery

International Nuclear Information System (INIS)

Myung, Seung-Taek; Lee, Myung-Hun; Komaba, Shinichi; Kumagai, Naoaki; Sun, Yang-Kook

2005-01-01

In attempts to prepare layered Li[Ni 1/3 Co 1/3 Mn 1/3 ]O 2 , hydrothermal method was employed. The hydrothermal precursor, [Ni 1/3 Co 1/3 Mn 1/3 ](OH) 2 , was synthesized via a coprecipitation route. The sphere-shaped powder precursor was hydrothermally reacted with LiOH aqueous solution at 170 deg. C for 4 days in autoclave. From X-ray diffraction and scanning electron microscopic studies, it was found that the as-hydrothermally prepared powders were crystallized to layered α-NaFeO 2 structure and the particles had spherical shape. The as-prepared Li[Ni 1/3 Co 1/3 Mn 1/3 ]O 2 delivered an initial discharge of about 110 mA h g -1 due to lower crystallinity. Heat treatment of the hydrothermal product at 800 deg. C was significantly effective to improve the structural integrity, which consequently affected the increase in the discharge capacity to 157 (4.3 V cut-off) and 182 mA h g -1 (4.6 V cut-off) at 25 deg. C with good reversibility

Spherical resonator for vapor-phase speed of sound and measurements of 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane (RE347mcc) and trans-1,3,3,3-tetrafluoropropene [R1234ze(E)

International Nuclear Information System (INIS)

Perkins, Richard A.; McLinden, Mark O.

2015-01-01

Highlights: • A spherical acoustic resonator for gas-phase speed of sound over the range T = (265 to 500) K, p < 10 MPa is described. • The sphere diameter was calibrated with argon and measurements on methane and ethane verified the performance of the system. • The sound speed of RE347mcc was measured over the range T = (325 to 500) K, p < 1.6 MPa. • The sound speed of R1234ze(E) was measured over the range T = (280 to 420) K, p < 2.8 MPa. • The average combined, expanded uncertainties for sound speed were 0.035 m · s"−"1 for RE347mcc and 0.064 m · s"−"1 for R1234ze(E). - Abstract: We describe an apparatus to measure the speed of sound of gas samples at temperatures from (265 to 500) K with pressures up to 10 MPa. The speed of sound was determined from the frequency of the three lowest-order radial resonance modes for the gas in a spherical cavity machined from type 321 stainless steel for corrosion resistance. The spherical resonator was contained in an isothermal copper block that was maintained at the temperature of interest by a multilayer thermostat with vacuum insulation. The dimensions of the spherical cavity were characterized as a function of temperature and pressure though calibration measurements with high-purity argon. The performance of the apparatus was demonstrated with measurements of high-purity methane and ethane. Measurements of the sound speed of 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane (RE347mcc) are reported at temperatures from (325 to 500) K with pressures up to 1.6 MPa. Measurements on trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) are reported at temperatures from (280 to 420) K with pressures up to 2.8 MPa. The average relative combined expanded uncertainties of the measured sound speed for RE347mcc and R1234ze(E) are (0.029 and 0.041)%, respectively.

Eccolib-Jeff-3.1 libraries; Les bibliotheques Eccolib-Jeff-3.1

Energy Technology Data Exchange (ETDEWEB)

Sublet, J Ch; Dean, Ch; Plisson-Rieunier, D

2006-07-01

The multi-group, multi-temperature libraries ECCOLIB-JEFF-3.1, derived from the JEFF-3.1 evaluations, have been produced using the NJOY-99 and CALENDF-2005 processing codes and the MERGE-3.8 and GECCO-1.4 interface tools. The processing steps are explained along side the Quality Assurance processes linked to such libraries. Final results encompass five main libraries; two fine 1968 group with probability tables for 104 major isotopes allowing detailed criticality studies, another in the same groups structure for the thermal compounds, and two others in coarser 172 XMAS and 175 Vitamin-J group structures for other criticality and shielding, transport studies. (authors)

High rate performance of novel cathode material Li1.33Ni1/3Co1/3Mn1/3O2 for lithium ion batteries

International Nuclear Information System (INIS)

Liu Haowen; Tan Long

2011-01-01

Highlights: → A novel cathode material with highly ordered structure has been prepared for the first time. → The charge and discharge current is 1000 mA g -1 and 2000 mA g -1 , respectively. → The results indicate better discharge capacity and cyclability. - Abstract: Li 1.33 Ni 1/3 Co 1/3 Mn 1/3 O 2 with highly ordered structure has been successfully synthesized via a simple co-precipitation process. Charge-discharge tests showed that the initial discharge capacities are 153.0 mAh g -1 and 128.9 mAh g -1 at 5 C (1000 mA g -1 ) and 10 C (2000 mA g -1 ) between 2.5 and 4.5 V, respectively. The average full-charge time of this material is less than 12 min at 5 C and 6 min at 10 C. The electrode material composed of the prepared showed a better cyclability. The excellent high rate performance is attributed to the improved ordered layered structure and the electrical conductivity. The excess Li shorten Li + diffusion distance between these submicron and nano-scaled particles. The results show that Li 1.33 Ni 1/3 Co 1/3 Mn 1/3 O 2 cathode material has potential application in lithium ion batteries.

RKIP phosphorylation–dependent ERK1 activation stimulates adipogenic lipid accumulation in 3T3-L1 preadipocytes overexpressing LC3

Energy Technology Data Exchange (ETDEWEB)

Hahm, Jong Ryeal [Department of Internal Medicine, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of); Institute of Health Sciences, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of); Ahmed, Mahmoud [Department of Biochemistry and Convergence Medical Science, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of); Institute of Health Sciences, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of); Kim, Deok Ryong, E-mail: drkim@gnu.ac.kr [Department of Biochemistry and Convergence Medical Science, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of); Institute of Health Sciences, Gyeongsang National University School of Medicine, JinJu, 527-27 (Korea, Republic of)

2016-09-09

3T3-L1 preadipocytes undergo adipogenesis in response to treatment with dexamethaxone, 1-methyl-3-isobutylxanthine, and insulin (DMI) through activation of several adipogenic transcription factors. Many autophagy-related proteins are also highly activated in the earlier stages of adipogenesis, and the LC3 conjugation system is required for formation of lipid droplets. Here, we investigated the effect of overexpression of green fluorescent protein (GFP)-LC3 fusion protein on adipogenesis. Overexpression of GFP-LC3 in 3T3-L1 preadipocytes using poly-L-lysine-assisted adenoviral GFP-LC3 transduction was sufficient to produce intracellular lipid droplets. Indeed, GFP-LC3 overexpression stimulated expression of some adipogenic transcription factors (e.g., C/EBPα or β, PPARγ, SREBP2). In particular, SREBP2 was highly activated in preadipocytes transfected with adenoviral GFP-LC3. Also, phosphorylation of Raf kinase inhibitory protein (RKIP) at serine 153, consequently stimulating extracellular-signal regulated kinase (ERK)1 activity, was significantly increased during adipogenesis induced by either poly-L-lysine-assisted adenoviral GFP-LC3 transduction or culture in the presence of dexamethasone, 1-methyl-3-isobutylxanthine, and insulin. Furthermore, RKIP knockdown promoted ERK1 and PPARγ activation, and significantly increased the intracellular accumulation of triacylglycerides in DMI-induced adipogenesis. In conclusion, GFP-LC3 overexpression in 3T3-L1 preadipocytes stimulates adipocyte differentiation via direct modulation of RKIP-dependent ERK1 activity. - Highlights: • Overexpression of GFP-LC3 in 3T3-L1 cells produces intracellular lipid droplets. • SREBP2 is highly activated in preadipocytes transfected with adenoviral GFP-LC3. • RKIP phosphorylation at serine 153 is significantly increased during adipogenesis. • RKIP knockdown promotes ERK1 and PPARγ activation during adipogenesis. • RKIP-dependent ERK1 activation increases triacylglycerides in

Improved conductivity of infinite-layer LaNiO2 thin films by metal organic decomposition

Science.gov (United States)

Ikeda, Ai; Manabe, Takaaki; Naito, Michio

2013-12-01

Infinite-layer LaNiO2 thin films were synthesized by metal organic decomposition and subsequent topotactic reduction in hydrogen, and their transport properties were investigated. LaNiO2 is isostructural to SrCuO2, the parent compound of high-Tc Sr0.9La0.1CuO2 with Tc = 44 K, and has 3d9 configuration, which is very rare in oxides but common to high-Tc copper oxides. The bulk synthesis of LaNiO2 is not easy, but we demonstrate in this article that the thin-film synthesis of LaNiO2 is rather easy, thanks to a large-surface-to-volume ratio, which makes oxygen diffusion prompt. Our refined synthesis conditions produced highly conducting films of LaNiO2. The resistivity of the best film is as low as 640 μΩ cm at 295 K and decreases with temperature down to 230 K but it shows a gradual upturn at lower temperatures.

Effects of Bi(Zn2/3Nb1/3)O3 Modification on the Relaxor Behavior and Piezoelectricity of Pb(Mg1/3Nb2/3)O3-PbTiO3 Ceramics.

Science.gov (United States)

Liu, Zenghui; Wu, Hua; Paterson, Alisa; Ren, Wei; Ye, Zuo-Guang

2017-10-01

Relaxor lead magnesium niobate (PMN)-based materials exhibit complex structures and unusual properties that have been puzzling researchers for decades. In this paper, a new ternary solid solution of Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 -Bi(Zn 2/3 Nb 1/3 )O 3 (PMN-PT-BZN) is prepared in the form of ceramics, and the effects of the incorporation of BZN into the PMN-PT binary system are investigated. The crystal structure favors a pseudocubic symmetry and the relaxor properties are enhanced as the concentration of BZN increases. The relaxor behavior and the related phase transformations are studied by dielectric spectroscopy. A phase diagram mapping out the characteristic temperatures and various states is established. Interestingly, the piezoelectricity of the PMN-PT ceramics is significantly enhanced by the BZN substitution, with an optimal value of d 33 reaching 826 pC/N for 0.96[0.7Pb(Mg 1/3 Nb 2/3 )O 3 -0.3PbTiO 3 ]-0.04Bi(Zn 2/3 Nb 1/3 )O 3 . This paper provides a better understanding of the relaxor ferroelectric behavior, and unveils a new relaxor-based ternary system as piezoelectric materials potentially useful for electromechanical transducer applications.

MCNP4c JEFF-3.1 Based Libraries. Eccolib-Jeff-3.1 libraries

International Nuclear Information System (INIS)

Sublet, J.Ch.

2006-01-01

Continuous-energy and multi-temperatures MCNP Ace types libraries, derived from the Joint European Fusion-Fission JEFF-3.1 evaluations, have been generated using the NJOY-99.111 processing code system. They include the continuous-energy neutron JEFF-3.1/General Purpose, JEFF-3.1/Activation-Dosimetry and thermal S(α,β) JEFF-3.1/Thermal libraries and data tables. The processing steps and features are explained together with the Quality Assurance processes and records linked to the generation of such multipurpose libraries. (author)

Synthesis of 1-amino-2-[3-(3-[2,6-14C]piperidinomethylphenoxy) propylamino]-1-cyclobutene-3,4-dione hydrochloride

International Nuclear Information System (INIS)

Swigor, J.E.; Algieri, A.A.; Standridge, R.T.; Pittman, K.A.

1985-01-01

The synthesis of the title compound is described. The condensation of 3-aminopropanol with phthalic anhydride and subsequent treatment with phosphorous tribromide produced N-[3-bromopropyl] phthalimide. Acylation with 3-hydroxybenzaldehyde, reduction with hydrogen over Raney nickel and subsequent treatment with thionyl chloride gave N-[3-(3-chloromethylphenoxy) propyl] phthalimide. Treatment with [2,6 - 14 C] piperidine introduced the radiolabel. Deprotection of the amino group with hydrazine and treatment with 3-methoxy-4-amino-3-cyclobutene-1,2-dione produced 1-amino-2-[3-(3-[2,6- 14 C]piperidinomethylphenoxy) propylamino]-1-cyclobutene-3, 4-dione. Treatment with hydrochloric acid yielded the title compound in an overall chemical yield of 22%. (author)

Four experimental stimulants found in sports and weight loss supplements: 2-amino-6-methylheptane (octodrine), 1,4-dimethylamylamine (1,4-DMAA), 1,3-dimethylamylamine (1,3-DMAA) and 1,3-dimethylbutylamine (1,3-DMBA).

OpenAIRE

Cohen, Pieter A; Travis, John C; Keizers, Peter H J; Deuster, Patricia; Venhuis, Bastiaan J

2017-01-01

The United States Food and Drug Administration banned the stimulant 1,3-dimethylamylamine (1,3-DMAA) from dietary supplements and warned consumers that the stimulant can pose cardiovascular risks ranging from high blood pressure to heart attacks.

Multilevel Resistance Switching Memory in La2/3Ba1/3MnO3/0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (011) Heterostructure by Combined Straintronics-Spintronics.

Science.gov (United States)

Zhou, Weiping; Xiong, Yuanqiang; Zhang, Zhengming; Wang, Dunhui; Tan, Weishi; Cao, Qingqi; Qian, Zhenghong; Du, Youwei

2016-03-02

We demonstrate a memory device with multifield switchable multilevel states at room temperature based on the integration of straintronics and spintronics in a La2/3Ba1/3MnO3/0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) (011) heterostructure. By precisely controlling the electric field applied on the PMN-PT substrate, multiple nonvolatile resistance states can be generated in La2/3Ba1/3MnO3 films, which can be ascribed to the strain-modulated metal-insulator transition and phase separation of Manganite. Furthermore, because of the strong coupling between spin and charge degrees of freedom, the resistance of the La2/3Ba1/3MnO3 film can be readily modulated by magnetic field over a broad temperature range. Therefore, by combining electroresistance and magnetoresistance effects, multilevel resistance states with excellent retention and endurance properties can be achieved at room temperature with the coactions of electric and magnetic fields. The incorporation of ferroelastic strain and magnetic and resistive properties in memory cells suggests a promising approach for multistate, high-density, and low-power consumption electronic memory devices.

UHV-TEM/TED observation of Ag islands grown on Si( 1 1 1 ) 3× 3-Ag surface

Science.gov (United States)

Oshima, Yoshifumi; Nakade, Hiroyuki; Shigeki, Sinya; Hirayama, Hiroyuki; Takayanagi, Kunio

2001-11-01

Growths of Ag islands on Si(1 1 1)3×3-Ag surface at room temperature were observed by UHV transmission electron microscopy and diffraction. The Ag islands grown after six monolayer deposition had neither (1 0 0) nor (1 1 0) orientation, but had two complex epitaxial orientations dominantly. One was striped islands which gave rise to a diffraction pattern commensurate with the 3×3 lattice of the Si(1 1 1) surface. The other was the coagulated islands whose diffraction pattern indicated the Ag(1 -3 4) sheet grown parallel to the Si(1 1 1) surface.

(E-3-Methyl-6-(3-oxo-3-(thiophen-2-yl-1-propenyl-2(3H-benzothiazolone

Directory of Open Access Journals (Sweden)

Yordanka Ivanova

2016-04-01

Full Text Available The title compound, (E-3-methyl-6-(3-oxo-3-(thiophen-2-yl-1-propenyl-2(3H-benzothiazolone, was synthesized by Claisen-Schmidt condensation of 3-methyl-2(3H-benzothiazolone-6-carbaldehyde with 2-acetylthiophene in 94% yield. The structure of the target compound was confirmed using 1H-NMR, 13C-NMR, IR, MS, and elemental analysis.

1,3-Dinitrosoimidazolidine

Directory of Open Access Journals (Sweden)

Augusto Rivera

2012-08-01

Full Text Available The title compound, C3H6N4O2, exhibits partial disorder with the refined occupancy ratios of the two components being 0.582 (5:0.418 (5. In the major component, the nitroso groups have a relative syn spatial arrangement [O=N...N=O pseudo-torsion angle = 1.1 (4°], whereas the other component has an anti disposition [177.6 (1°]. The N—N=O moieties are almost coplanar with a dihedral angle of 5.3 (3°, while in the minor occupied set of atoms, this angle is 8 (1°. In both components, the imidazolidine ring adopts a twisted conformation on the C—C bond and the crystal structure shows the strain of this ring according to the N—CH2—CH2—N torsion angles [25.9 (5 and −23.8 (7°]. In the crystal, molecules are linked by weak C—H...O hydrogen bonds.

Synthesis and structure of Bis(3,3-dimethyl-3,4-dihydroisoquinolyl-1) ketoxime

International Nuclear Information System (INIS)

Sokol, V.I.; Davydov, V.V.; Shklyaev, Yu.V.; Kartashova, I.V.; Sergienko, V.S.; Zaitsev, B.E.

1997-01-01

The reaction of bis(3,3-dimethyl-3,4-dihydroisoquinolyl-1)methane with NaNO 2 resulted in the formation of bis(3,3-dimethyl-3,4-dihydroisoquinolyl-1) ketoxime (I). The crystal and molecular structure of I was determined (x-ray structure analysis, Enraf-Nonius CAD-4, MoK α -radiation, graphite monochromator, θ/2θ scan, 2θ max =58 deg. , 4800 unique reflections; a=10.327(4), b=9.070(5), and c=21.62(1) A; β=94.02(3) deg.; V=2020(1) A 3 ; Z=4; and sp. gr. Pn). In the crystal, I exists in the oxime tautomeric form. Two symmetry-independent molecules are bound into a dimer through the intermolecular N=OH···N cycl 3 hydrogen bond. Both molecules are nonplanar; the dihedral angles between the mean planes of their 3,4-dihydroisoquinoline moieties are 72 deg. and 74 deg. According to IR and electron absorption spectra, the tautomeric form of compound I is also retained in solutions, and the π-conjugation between the 3,4-dihydroisoquinoline fragments of I is actually absent

Observation of divergent La3+ ion dilute effect in two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RExLa1−x–EBTC (RE3+=Eu3+ or Tb3+; EBTC4−=1,1′-ethynebenzene-3,3′,5,5′-etracarboxylate)

International Nuclear Information System (INIS)

Zhai, Lu; Zhang, Wen-Wei; Ren, Xiao-Ming; Zuo, Jing-Lin

2015-01-01

The lanthanide metal-organic frameworks (MOFs) [Ln 2 (EBTC) 1.5 (CH 3 OH) 4 ]·6H 2 O are isostructural to each other, where EBTC 4− =1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate; Ln 3+ =La 3+ , Eu 3+ and Tb 3+ ; and the corresponding MOF is abbreviated as Ln–EBTC. MOFs Eu–EBTC and Tb–EBTC emit intense red and green luminescence (visible by bare eyes), respectively. The molecular alloys of Eu x La 1−x –EBTC and Tb x La 1−x –EBTC have been successfully prepared by mixing Eu 3+ /Tb 3+ and La 3+ salts with the desired molar ratio in the starting material. Two series of Eu x La 1−x –EBTC and Tb x La 1−x –EBTC molecular alloys are isomorphic to the parent Ln–EBTC MOFs, while exhibit divergent La 3+ ion diluting effect, namely, with increasing the relative amount of La 3+ , the intensity of characteristic emission arising from Tb 3+ ion monotonely increases in Tb x La 1−x –EBTC molecular alloys, whereas that of Eu 3+ ion shows non-monotone decrease in Eu x La 1−x –EBTC molecular alloys. The possible origin is discussed for such a divergent behavior between Eu x La 1−x –EBTC and Tb x La 1−x –EBTC molecular alloys. - Graphical abstract: Two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RE x La 1−x –EBTC (RE 3+ =Eu 3+ or Tb 3+ ; EBTC 4− =1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate) have been successfully prepared by mixing Eu 3+ /Tb 3+ and La 3+ salts with the desired molar ratio in the starting material and showed photoluminescence property with divergent La 3+ ion dilute effect. - Highlights: • 3-D molecular alloys of Eu x La 1−x –EBTC and Tb x La 1−x –EBTC were prepared. • They are isomorphic to the parent Ln–EBTC MOFs. • They show photoluminescence property with divergent La 3+ ion diluting effect. • The possible origin is discussed for such a divergent behavior

Neutrino masses and superheavy dark matter in the 3-3-1-1 model

Energy Technology Data Exchange (ETDEWEB)

Huong, D.T.; Dong, P.V. [Vietnam Academy of Science and Technology, Institute of Physics, Hanoi (Viet Nam)

2017-04-15

In this work, we interpret the 3-3-1-1 model when the B - L and 3-3-1 breaking scales behave simultaneously as the inflation scale. This setup not only realizes the previously achieved consequences of inflation and leptogenesis, but also provides new insights in superheavy dark matter and neutrino masses. We argue that the 3-3-1-1 model can incorporate a scalar sextet, which induces both small masses for the neutrinos via a combined type I and II seesaw and large masses for the new neutral fermions. Additionally, all the new particles have large masses in the inflation scale. The lightest particle among the W-particles that have abnormal (i.e., wrong) B - L number in comparison to those of the standard model particles may be superheavy dark matter as it is stabilized by W-parity. The dark matter candidate may be a Majorana fermion, a neutral scalar, or a neutral gauge boson, which was properly created in the early universe due to gravitational effects on the vacuum or thermal production after cosmic inflation. (orig.)

Evaluation excitation functions for "2"8Si(n,p)"2"8Al, "3"1P(n,p)"3"1Si, and "1"1"3In(n,γ)"1"1"4"mIn reactions

International Nuclear Information System (INIS)

Zolotarev, K.I.

2014-10-01

Cross section data for "2"8Si(n,p)"2"8Al, "3"1P(n,p)"3"1Si and "1"1"3In(n,γ)"1"1"4"mIn reactions are needed for solving a wide spectrum of scientific and technical tasks. The excitation function of "2"8Si(n,p)"2"8Al reaction refers to the nuclear data involved in fusion reactor design calculations. The "2"8Si(n,p)"2"8Al reaction is interesting also as the monitor reaction for measurements at fusion facilities. Activation detectors on the basis of the 31P(n,p)31Si reaction are commonly used in the reactor dosimetry. The "1"1"3In(n,γ)"1"1"4"mIn reaction is promising regarding reactor dosimetry application for two reasons. First, due to the "1"1"4"mIn decay parameters which are rather suitable for activation measurements. Half-life of "1"1"4"mIn is equal to T_1/_2 = (49.51 ± 0.01) days and gamma spectrum accompanying decay has only one line with energy 190.27 keV and intensity (15.56 ± 0.15)%. Second, the "1"1"3In(n,γ)"1"1"4"mIn reaction rate may be measured by using one activation detector simultaneously with the "1"1"5In(n,γ)"1"1"6"mIn reaction. Preliminary analysis of existing evaluated excitation functions for "2"8Si(n,p)"2"8Al, "3"1P(n,p)"3"1Si and "1"1"3In(n,γ)"1"1"4"mIn reactions show that new evaluations are needed for all above mentioned reactions. This report is devoted to the preparation of the new evaluations of cross sections data and related covariance matrixes of uncertainties for the "2"8Si(n,p)"2"8Al, "3"1P(n,p)"3"1Si and "1"1"3In(n,γ)"1"1"4"mIn reactions.

Human safety and pharmacokinetics of the CFC alternative propellants HFC 134a (1,1,1,2-tetrafluoroethane) and HFC 227 (1,1,1,2,3,3,3-heptafluoropropane) following whole-body exposure

NARCIS (Netherlands)

Emmen, H.H.; Hoogendijk, E.M.G.; Klöpping-Ketelaars, W.A.A.; Muijser, H.; Duistermaat, E.; Ravensberg, J.C.; Alexander, D.J.; Borkhataria, D.; Rusch, G.M.; Schmit, B.

2000-01-01

HFC 134a (1,1,1,2-tetrafluoroethane) and HFC 227 (1,1,1,2,3,3,3-heptafluoropropane) are used to replace chlorofluorocarbons (CFCs) in refrigerant and aerosol applications, including medical use in metered-dose inhalers. Production and consumption of CFCs are being phased out under the Montreal

Toxicology, occurrence and risk characterisation of the chloropropanols in food: 2-monochloro-1,3-propanediol, 1,3-dichloro-2-propanol and 2,3-dichloro-1-propanol.

Science.gov (United States)

Andres, Susanne; Appel, Klaus E; Lampen, Alfonso

2013-08-01

Great attention has been paid to chloropropanols like 3-monochloro-1,2-propanediol and the related substance glycidol due to their presence in food and concerns about their toxic potential as carcinogens. The other chloropropanols 2-monochloro-1,3-propanediol, 1,3-dichloro-2-propanol and 2,3-dichloro-1-propanol have been found in certain foods, but occurrence data are generally limited for these compounds. 1,3-dichloro-2-propanol has the most toxicological relevance showing clear carcinogenic effects in rats possibly via a genotoxic mechanism. The dietary exposure to 1,3-dichloro-2-propanol is quite low. Calculated "Margins of Exposure" values are above 10,000. It is concluded that the 1,3-dichloro-2-propanol exposure is of low concern for human health. The toxicology of 2,3-dichloro-1-propanol has not been adequately investigated. Its toxicological potential regarding hepatotoxic effects seems to be lower than that of 1,3-dichloro-2-propanol. Limited data show that 2,3-dichloro-1-propanol occurs only in trace amounts in food, indicating that exposure to 2,3-dichloro-1-propanol seems to be also of low concern for human health. The dietary 2-monochloro-1,3-propanediol burden appears to be lower than that of 3-monochloro-1,2-propanediol. An adequate risk assessment for 2-monochloro-1,3-propanediol cannot be performed due to limited data on the toxicology and occurrence in food. This article reviews the relevant information about the toxicology, occurrence and dietary exposure to the chloropropanols 2-monochloro-1,3-propanediol, 1,3-dichloro-2-propanol and 2,3-dichloro-1-propanol. Copyright © 2013 Elsevier Ltd. All rights reserved.

2-Aminopyrimidine-3,3,3-triphenylpropanoic acid (1/1).

Science.gov (United States)

Serafin, Mateusz F; Wheeler, Kraig A

2007-11-01

The title bimolecular compound, C(4)H(5)N(3).C(21)H(18)O(2), constructed from 2-aminopyrimidine and 3,3,3-triphenylpropanoic acid, forms a tetramolecular hydrogen-bonded motif via O-H...N, N-H...O and N-H...N contacts. This aggregate organizes to give crystal-packing motifs with hydrophilic and hydrophobic regions.

Oxidation reactions of 1,3-diphenylpropane-1,3-dione

Indian Academy of Sciences (India)

Formation of a stable product with a broad absorption band starting from 400 nm and cut off at 230 nm was observed in the oxidation of 1 with ∙ OH and ∙ N3 radicals. In a biological system also, 1 showed significant inhibitory activity against Fe2+-mediated lipid peroxidation. Based on these observations, a suitable ...

Synthesis 1, 3-bis (4-bromophenyl-5-isopropyl-1, 3, 5-triazacyclohexane

Directory of Open Access Journals (Sweden)

L. LEFRADA

2015-03-01

Full Text Available Condensation of an isopropylamine and an 4-bromoaniline with formaline in basic solution to give 1, 3-bis (4-bromophenyl-5- (isopropyl- 1, 3, 5- triazicyaclohexane. Through the interaction of rapid Schiff base, Structures of this compound have been elucidated by spectroscopic methods; IR, 1H NMR, 13C NMR. Their purities were confirmed by elemental analyses.

S-Alkylated/aralkylated 2-(1H-indol-3-yl-methyl)-1,3,4- oxadiazole-5 ...

African Journals Online (AJOL)

ylmethyl)-1,3,4- oxadiazole-5-thiol derivatives. Methods: 2-(1H-indol-3-yl)acetic acid (1) was reacted with absolute ethanol and catalytic amount of sulfuric acid to form ethyl 2-(1H-indol-3-yl)acetate (2) which was transformed to 2-(1H-indol-3- ...

La2/3Sr1/3MnO3-La0.1Bi0.9MnO3 heterostructures for spin filtering

Science.gov (United States)

Gajek, M.; Bibes, M.; Varela, M.; Fontcuberta, J.; Herranz, G.; Fusil, S.; Bouzehouane, K.; Barthélémy, A.; Fert, A.

2006-04-01

We have grown heterostructures associating half-metallic La2/3Sr1/3MnO3 (LSMO) bottom electrodes and ferromagnetic La0.1Bi0.9MnO3 (LBMO) tunnel barriers. The layers in the heterostructures have good structural properties and top LBMO films (4 nm thick) have a very low roughness when deposited onto LSMO/SrTiO3(1.6 nm) templates. The LBMO films show an insulating behavior and a ferromagnetic character that are both preserved down to very low thicknesses. They are thus suitable for being used as tunnel barriers. Spin-dependent transport measurements performed on tunnel junctions defined from LSMO/SrTiO3/LBMO/Au samples show a magnetoresistance of up to ~90% at low temperature and bias. This evidences a spin-filtering effect by the LBMO layer, with a spin-filtering efficiency of ~35%.

Synthesis and characterization of tritium labeled N-((R)-1-((S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl)-3-methyl-1-oxobutan-2-yl)-3-sulfamoylbenzamide.

Science.gov (United States)

Hong, Yang; Hynes, John; Tian, Yuan; Balasubramanian, Balu; Bonacorsi, Samuel

2015-08-01

N-((R)-1-((S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl)-3-methyl-1-oxobutan-2-yl)-3-sulfamoylbenzamide is a potent C-C chemokine receptor 1 (CCR1) antagonist. The compound, possessing benzamide functionality, successfully underwent tritium/hydrogen (T/H) exchange with an organoiridium catalyst (Crabtree's catalyst). The labeling pattern in the product was studied with liquid chromatography-mass spectrometry, time-of-flight mass spectrometry, and (3) H-NMR. Overall, multiple labeled species were identified. In addition to the anticipated incorporation of tritium in the benzamide moiety, tritium labeling was observed in the valine portion of the molecule including substitution at its chiral carbon. Using authentic standards, liquid chromatography analysis of the labeled compound showed complete retention of stereochemical configuration. Copyright © 2015 John Wiley & Sons, Ltd.

1-[3-(2-Methyl-4-phenylquinolin-3-yl-5-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-propane-1-one

Directory of Open Access Journals (Sweden)

Allaoua Kedjadja

2015-06-01

Full Text Available A novel compound, 1-[3-(2-methyl-4-phenylquinolin-3-yl-5-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-propane-1-one (3 has been synthesized by cyclocondensation of (E-1-(2-methyl-4-phenylquinolin-3-yl-3-phenylprop-2-en-1-one (2 and hydrazine hydrate in propionic acid. The structure of this compound was established by elemental analysis, IR, 1H-NMR, 13C-NMR and MS data.

Phosphatidylcholine induces apoptosis of 3T3-L1 adipocytes

Directory of Open Access Journals (Sweden)

Li Hailan

2011-12-01

Full Text Available Abstract Background Phosphatidylcholine (PPC formulation is used for lipolytic injection, even though its mechanism of action is not well understood. Methods The viability of 3T3-L1 pre-adipocytes and differentiated 3T3-L1 cells was measured after treatment of PPC alone, its vehicle sodium deoxycholate (SD, and a PPC formulation. Western blot analysis was performed to examine PPC-induced signaling pathways. Results PPC, SD, and PPC formulation significantly decreased 3T3-L1 cell viability in a concentration-dependent manner. PPC alone was not cytotoxic to CCD-25Sk human fibroblasts at concentrations Conclusions PPC results in apoptosis of 3T3-L1 cells.

WEHI-3 cells inhibit adipocyte differentiation in 3T3-L1 cells

Energy Technology Data Exchange (ETDEWEB)

Lai, Jing [The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong (China); Liu, Gexiu [Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong (China); Yan, Guoyao [The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong (China); He, Dongmei [Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong (China); Zhou, Ying [The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong (China); Chen, Shengting, E-mail: shengtingchen@sina.cn [The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong (China)

2015-06-26

By investigating the anti-adipogenic effects of WEHI-3 cells – a murine acute myelomonocytic leukemia cell line – we sought to improve the efficiency of hematopoietic stem cell transplantation (HSCT). Analysis of Oil Red O staining and the expression of adipogenic genes, including PPARγ, C/EBPα, FAS and LPL, indicated that WEHI-3 cells significantly inhibited 3T3-L1 mouse preadipocyte cells from differentiating into adipocytes. In vivo, fat vacuoles in mice injected with WEHI-3 cells were also remarkably reduced in the murine bone marrow pimelosis model. Moreover, the key gene in the Rho signaling pathway, ROCKII, and the key gene in the Wnt signaling pathway, β-catenin, were both upregulated compared with the control group. siRNA-mediated knockdown of ROCKII and β-catenin reversed these WEHI-3-mediated anti-adipogenic effects. Taken together, these data suggest that WEHI-3 cells exert anti-adipogenic effects and that both ROCKII and β-catenin are involved in this process. - Highlights: • WEHI-3, an acute myelomonocytic leukemia cell line, inhibited 3T3-L1 preadipocyte from differentiating into adipocyte. • WEHI-3 cells can arrest 3T3-L1 cells in G0/G1 phase by secreting soluble factors and thus inhibit their proliferation. • WEHI-3 cells reduced bone marrow pimelosis in the murine model. • Both ROCKII and β-catenin were involved in the WEHI-3-mediated anti-adipogenic effects.

Novel 2,3-Dihydro-1H-pyrrolo[3,2,1-ij]quinazolin-1-ones: Synthesis and Biological Evaluation

Directory of Open Access Journals (Sweden)

Malose J. Mphahlele

2016-12-01

Full Text Available Herein we describe the synthesis and evaluation of a series of novel 2,3-dihydro-1H-pyrrolo[3,2,1-ij]quinazolin-1-ones for in vitro cytotoxicity against three human cancer cell lines as well as for potential antimalarial activity against the chloroquine-sensitive strain 3D7 of Plasmodium falciparum. The title compounds were prepared via PdCl2-mediated endo-dig cyclization of 2-aryl-8-(arylethynyl-6-bromo-2,3-dihydroquinazolin-4(1H-ones. The latter were prepared, in turn, via initial Sonogashira cross-coupling of 2-amino-5-bromo-3-iodobenzamide with aryl acetylenes followed by boric acid-mediated cyclocondensation of the intermediate 2-amino-3-(arylethynyl-5-bromobenzamides with benzaldehyde derivatives. The 2,3-dihydro-1H-pyrrolo[3,2,1-ij]quinazolin-1-ones 4a–k were evaluated for potential in vitro cytotoxicity against the breast (MCF-7, melanoma (B16 and endothelioma (sEnd.2 cell lines. All of the compounds except 4h and 4i were found to be inactive against the three cancer cell lines. Compound 4h substituted with a 4-methoxyphenyl and 4-fluorophenyl groups at the 3- and 5-positions was found to exhibit significant cytotoxicity against the three cancer cell lines. The presence of phenyl and 3-chlorophenyl groups at the 3- and 5-posiitons of the pyrroloquinazolinone 4i, on the other hand, resulted in significant cytotoxicity against vascular tumour endothelial cells (sEnd.2, but reduced activity against the melanoma (B16 and breast cancer (MCF-7 cells except at higher concentrations. The 2,3-dihydro-1H-pyrrolo[3,2,1-ij]quinazolin-1-ones 4a–l were found to be inactive against the chloroquine sensitive 3D7 strain of Plasmodium falciparum.

Leaching process for recovering valuable metals from the LiNi1/3Co1/3Mn1/3O2 cathode of lithium-ion batteries.

Science.gov (United States)

He, Li-Po; Sun, Shu-Ying; Song, Xing-Fu; Yu, Jian-Guo

2017-06-01

In view of the importance of environmental protection and resource recovery, recycling of spent lithium-ion batteries (LIBs) and electrode scraps generated during manufacturing processes is quite necessary. An environmentally sound leaching process for the recovery of Li, Ni, Co, and Mn from spent LiNi 1/3 Co 1/3 Mn 1/3 O 2 -based LIBs and cathode scraps was investigated in this study. Eh-pH diagrams were used to determine suitable leaching conditions. Operating variables affecting the leaching efficiencies for Li, Ni, Co, and Mn from LiNi 1/3 Co 1/3 Mn 1/3 O 2 , such as the H 2 SO 4 concentration, temperature, H 2 O 2 concentration, stirring speed, and pulp density, were investigated to determine the most efficient conditions for leaching. The leaching efficiencies for Li, Ni, Co, and Mn reached 99.7% under the optimized conditions of 1M H 2 SO 4 , 1vol% H 2 O 2 , 400rpm stirring speed, 40g/L pulp density, and 60min leaching time at 40°C. The leaching kinetics of LiNi 1/3 Co 1/3 Mn 1/3 O 2 were found to be significantly faster than those of LiCoO 2 . Based on the variation in the weight fraction of the metal in the residue, the "cubic rate law" was revised as follows: θ(1-f) 1/3 =(1-kt/r 0 ρ), which could characterize the leaching kinetics optimally. The activation energies were determined to be 64.98, 65.16, 66.12, and 66.04kJ/mol for Li, Ni, Co, and Mn, respectively, indicating that the leaching process was controlled by the rate of surface chemical reactions. Finally, a simple process was proposed for the recovery of valuable metals from spent LiNi 1/3 Co 1/3 Mn 1/3 O 2 -based LIBs and cathode scraps. Copyright © 2017 Elsevier Ltd. All rights reserved.

Zn-Doped LiNi1/3Co1/3Mn1/3O2 Composite as Cathode Material for Lithium Ion Battery: Preparation, Characterization, and Electrochemical Properties

Directory of Open Access Journals (Sweden)

Han Du

2015-01-01

Full Text Available Zn-doped LiNi1/3Co1/3Mn1/3O2 composite, Li(Ni1/3Co1/3Mn1/31–xZnxO2 (x = 0.02; 0.05; 0.08, is synthesized by the sol-gel method. The crystal structure, morphology, and electrochemical performance are investigated via X-ray diffraction (XRD, scanning electron microscope (SEM, cyclic voltammetry (CV, and constant current charge/discharge experiment. The result reveals that Zn-doping cathode material can reach the initial charge/discharge capacity of 188.8/162.9 mAh·g−1 for Li(Ni1/3Co1/3Mn1/30.98Zn0.02O2 and 179.0/154.1 mAh·g−1 for Li(Ni1/3Co1/3Mn1/30.95Zn0.05O2 with the high voltage of 4.4 V at 0.1 C. Furthermore, the capacity retention of Li(Ni1/3Co1/3Mn1/30.98Zn0.02O2 is 95.1% at 0.5 C after 50 cycles at room temperature. The improved electrochemical properties of Zn-doped LiNi1/3Co1/3Mn1/3O2 are attributed to reduced electrode polarization, enhanced capacity reversibility, and excellent cyclic performance.

Synthesis and Preliminary Cytotoxicity Studies of 1-[1-(4,5-Dihydrooxazol- 2-yl)-1H-indazol-3-yl]-3-phenylurea and 3-phenylthiourea Derivatives.

Science.gov (United States)

Kornicka, Anita; Saczewski, Franciszek; Bednarski, Patrick J; Korcz, Martyna; Szumlas, Piotr; Romejko, Ewa; Sakowicz, Aneta; Sitek, Lukasz; Wojciechowska, Monika

2017-01-01

N-substituted 3-amino-1H-indazoles represent an interesting class of biologically active compounds. Among them, derivatives containing phenylurea moiety are of particular interest. Such compounds have been found to possess inhibitory activity against cancer cell growth. Additionally, various oxazoline-containing compounds have also been designed as potential anticancer agents. The aim of this work was to obtain a new class of N-substituted 3-amino-1H-indazole derivatives with cytotoxic activity towards cancer cells. Two series of 1-[1-(4,5-dihydrooxazol-2-yl)-1H-indazol-3-yl]-3-phenylurea and 3- phenylthiourea derivatives 7-17 and 18-22, respectively, were prepared and screened for their potential in vitro cytotoxic activities against lung carcinoma LCLC-103H cell line using a crystal violet microtiter plate assay. All the urea derivatives, except the compound 8, were inactive at a concentration of 20 μM attainable in cancer cells, while the thiourea derivatives showed a pronounced cancer cell growth inhibitory effects. The most potent 1-[1-(4,5-dihydrooxazol-2-yl)-1H-indazol-3-yl]-3-ptolylthiourea (19) exhibited cytotoxicity on the lung cancer LCLC-103H and cervical cancer SISO cell lines at a concentration of 10 µM. Moreover, compound 19 displayed cytostatic activity against pancreas cancer DAN-G cell line. The 1-[1-(4,5-dihydrooxazol-2-yl)-1H-indazol-3-yl]-3-phenylthiourea derivatives described herein may serve as a useful scaffold for the search for novel anticancer agents. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

Fragrance material review on 1-(3,5,6-trimethyl-3-cyclohexen-1-yl)ethan-1-one.

Science.gov (United States)

Scognamiglio, J; Letizia, C S; Api, A M

2013-12-01

A toxicologic and dermatologic review of 1-(3,5,6-trimethyl-3-cyclohexen-1-yl)ethan-1-one when used as a fragrance ingredient is presented. 1-(3,5,6-Trimethyl-3-cyclohexen-1-yl)ethan-1-one is a member of the fragrance structural group Alkyl Cyclic Ketones. These fragrances can be described as being composed of an alkyl, R1, and various substituted and bicyclic saturated or unsaturated cyclic hydrocarbons, R2, in which one of the rings may include up to 12 carbons. Alternatively, R2 may be a carbon bridge of C2-C4 carbon chain length between the ketone and cyclic hydrocarbon. This review contains a detailed summary of all available toxicology and dermatology papers that are related to this individual fragrance ingredient and is not intended as a stand-alone document. Available data for 1-(3,5,6-trimethyl-3-cyclohexen-1-yl)ethan-1-one were evaluated then summarized and includes physical properties, skin irritation, and skin sensitization data. A safety assessment of the entire Alkyl Cyclic Ketones will be published simultaneously with this document; please refer to Belsito et al. (Belsito, D., Bickers, D., Bruze, M., Calow, P., Dagli, M., Fryer, A.D., Greim, H., Miyachi, Y., Saurat, J.H., Sipes, I.G., 2013. A Toxicologic and Dermatologic Assessment of Alkyl Cyclic Ketones When Used as Fragrance Ingredients (submitted for publication)) for an overall assessment of the safe use of this material and all Alkyl Cyclic Ketones in fragrances. Copyright © 2013 Elsevier Ltd. All rights reserved.

Influence of Temperature on the Performance of LiNi1/3Co1/3Mn1/3O2 Prepared by High-Temperature Ball-Milling Method

Directory of Open Access Journals (Sweden)

Ming Tian

2018-01-01

Full Text Available Aiming at the preparation of high electrochemical performance LiNi1/3Co1/3Mn1/3O2 cathode material for lithium-ion battery, LiNi1/3Co1/3Mn1/3O2 was prepared with lithium carbonate, nickel (II oxide, cobalt (II, III oxide, and manganese dioxide as raw materials by high-temperature ball-milling method. Influence of ball-milling temperature was investigated in this work. It was shown that the fine LiNi1/3Co1/3Mn1/3O2 powder with high electrochemical performance can be produced by the high-temperature ball-milling process, and the optimal ball-milling temperature obtained in the current study was 750°C. Its initial discharge capacity was 146.0 mAhg−1 at the rate of 0.1 C, and over 50 cycles its capacity retention rate was 90.2%.

Gadolinium (III) 2-benzoyl-1,1,3,3-tetracyanopropenide diacetate. Synthesis and crystal structure

Energy Technology Data Exchange (ETDEWEB)

Karpov, Sergey V.; Kayukov, Yakov S.; Grigor' ev, Arthur A. [Department of Chemistry and Pharmaceutics, I.N. Ul' yanov Chuvash State University, Cheboksary (Russian Federation); Tafeenko, Victor A. [Department of Chemistry, Lomonosov Moscow State University (Russian Federation)

2018-02-15

2-Acyl-1,1,3,3-tetracyanopropenides (ATCN) is a stable organic salts, containing the carbonyl group in addition to the tetracyanoallyl (TCA) fragment in the anion. TCA anions are known as bridging ligands with variable denticity with potential application in organic electronics and as a ionic liquids components. In this communication we reporting the synthesis and crystal structure of gadolinium(III) 2-benzoyl-1,1,3,3-tetracyanopropenide diacetate - the first lanthanide ATCN. (copyright 2018 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Synthesis and Antimicrobial Activity of Novel 3-[1-(3-nitrophenyl)-ethyl

African Journals Online (AJOL)

Syntheses of novel 3-[1-(3-nitrophenyl)-ethyl]-1-(indole-1-yl) substituted aryl/alkyl phosphinoyl/thiophosphinoyl/selenophosphinoyl-1H-indole derivatives were accomplished in two steps. The synthetic route involves the cyclisation of equimolar quantities of 3-[1H-3-indolyl(3-nitrophenyl)methyl]-1H-indole with dichlorophenyl ...

Endoplasmic reticulum stress suppresses lipin-1 expression in 3T3-L1 adipocytes

International Nuclear Information System (INIS)

Takahashi, Nobuhiko; Yoshizaki, Takayuki; Hiranaka, Natsumi; Suzuki, Takeshi; Yui, Tomoo; Akanuma, Masayoshi; Kanazawa, Kaoru; Yoshida, Mika; Naito, Sumiyoshi; Fujiya, Mikihiro; Kohgo, Yutaka; Ieko, Masahiro

2013-01-01

Highlights: ► Lipin-1 involves lipid metabolism, adipocyte differentiation, and inflammation. ► Adipose lipin-1 expression is reduced in obesity. ► ER stress suppresses lipin-1 expression in 3T3-L1 adipocytes. ► Activation of PPAR-γ recovers ER stress-induced lipin-1 reduction. -- Abstract: Lipin-1 plays crucial roles in the regulation of lipid metabolism and cell differentiation in adipocytes. In obesity, adipose lipin-1 mRNA expression is decreased and positively correlated with systemic insulin sensitivity. Amelioration of the lipin-1 depletion might be improved dysmetabolism. Although some cytokines such as TNF-α and interleukin-1β reduces adipose lipin-1 expression, the mechanism of decreased adipose lipin-1 expression in obesity remains unclear. Recently, endoplasmic reticulum (ER) stress is implicated in the pathogenesis of obesity. Here we investigated the role of ER stress on the lipin-1 expression in 3T3-L1 adipocytes. We demonstrated that lipin-1 expression was suppressed by the treatment with ER stress inducers (tunicamycin and thapsigargin) at transcriptional level. We also showed that constitutive lipin-1 expression could be maintained by peroxisome proliferator-activated receptor-γ in 3T3-L1 adipocytes. Activation of peroxisome proliferator-activated receptor-γ recovered the ER stress-induced lipin-1 suppression. These results suggested that ER stress might be involved in the pathogenesis of obesity through lipin-1 depletion

Endoplasmic reticulum stress suppresses lipin-1 expression in 3T3-L1 adipocytes

Energy Technology Data Exchange (ETDEWEB)

Takahashi, Nobuhiko, E-mail: ntkhs@hoku-iryo-u.ac.jp [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, 2-1-1-1, Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510 (Japan); Yoshizaki, Takayuki [Innovation Center, Kagoshima University, 1-21-40, Korimoto, Kagoshima 890-0065 (Japan); Hiranaka, Natsumi; Suzuki, Takeshi [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Yui, Tomoo; Akanuma, Masayoshi [Department of Fixed Prosthodontics and Oral Implantology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Kanazawa, Kaoru [Department of Dental Anesthesiology, School of Dentistry, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Yoshida, Mika; Naito, Sumiyoshi [Department of Clinical Laboratory, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Fujiya, Mikihiro; Kohgo, Yutaka [Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, 2-1-1-1, Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510 (Japan); Ieko, Masahiro [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757, Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan)

2013-02-01

Highlights: ► Lipin-1 involves lipid metabolism, adipocyte differentiation, and inflammation. ► Adipose lipin-1 expression is reduced in obesity. ► ER stress suppresses lipin-1 expression in 3T3-L1 adipocytes. ► Activation of PPAR-γ recovers ER stress-induced lipin-1 reduction. -- Abstract: Lipin-1 plays crucial roles in the regulation of lipid metabolism and cell differentiation in adipocytes. In obesity, adipose lipin-1 mRNA expression is decreased and positively correlated with systemic insulin sensitivity. Amelioration of the lipin-1 depletion might be improved dysmetabolism. Although some cytokines such as TNF-α and interleukin-1β reduces adipose lipin-1 expression, the mechanism of decreased adipose lipin-1 expression in obesity remains unclear. Recently, endoplasmic reticulum (ER) stress is implicated in the pathogenesis of obesity. Here we investigated the role of ER stress on the lipin-1 expression in 3T3-L1 adipocytes. We demonstrated that lipin-1 expression was suppressed by the treatment with ER stress inducers (tunicamycin and thapsigargin) at transcriptional level. We also showed that constitutive lipin-1 expression could be maintained by peroxisome proliferator-activated receptor-γ in 3T3-L1 adipocytes. Activation of peroxisome proliferator-activated receptor-γ recovered the ER stress-induced lipin-1 suppression. These results suggested that ER stress might be involved in the pathogenesis of obesity through lipin-1 depletion.

Effect of 24,25-dihydroxyvitamin D3 on 1,25-dihydroxyvitamin D3 [1,25-(OH)2D3] metabolism in vitamin D-deficient rats infused with 1,25-(OH)2D3

International Nuclear Information System (INIS)

Yamato, H.; Matsumoto, T.; Fukumoto, S.; Ikeda, K.; Ishizuka, S.; Ogata, E.

1989-01-01

Previous studies revealed that administration of 24,25-dihydroxyvitamin D3 [24,25-(OH)2D3] to calcium (Ca)-deficient rats causes a dose-dependent reduction in markedly elevated serum 1,25-(OH)2D3 level. Although the results suggested that the metabolism of 1,25-(OH)2D3 was accelerated by 24,25-(OH)2D3, those experiments could not define whether the enhanced metabolism of 1,25-(OH)2D3 played a role in the reduction in the serum 1,25-(OH)2D3 level. In the present study, in order to address this issue more specifically, serum 1,25-(OH)2D3 was maintained solely by exogenous administration through miniosmotic pumps of 1,25-(OH)2D3 into vitamin D-deficient rats. Thus, by measuring the serum 1,25-(OH)2D3 concentration, the effect of 24,25-(OH)2D3 on the MCR of 1,25-(OH)2D3 could be examined. Administration of 24,25-(OH)2D3 caused a dose-dependent enhancement in the MCR of 1,25-(OH)2D3, and 1 microgram/100 g rat.day 24,25-(OH)2D3, which elevated serum 24,25-(OH)2D3 to 8.6 +/- 1.3 ng/ml, significantly increased MCR and suppressed serum levels of 1,25-(OH)2D3. The effect of 24,25-(OH)2D3 on 1,25-(OH)2D3 metabolism developed with a rapid time course, and the recovery of iv injected [1 beta-3H]1,25-(OH)2D3 in blood was significantly reduced within 1 h. In addition, there was an increase in radioactivity in the water-soluble fraction of serum as well as in urine, suggesting that 1,25-(OH)2D3 is rapidly degraded to a water-soluble metabolite(s). Furthermore, the reduction in serum 1,25-(OH)2D3 was associated with a reduction in both serum and urinary Ca levels. Because the conversion of [3H]24,25-(OH)2D3 to [3H]1,24,25-(OH)2D3 or other metabolites was minimal in these rats, 24,25-(OH)2D3 appears to act without being converted into other metabolites. These results demonstrate that 24,25-(OH)2D3 rapidly stimulates the metabolism of 1,25-(OH)2D3 and reduces its serum level

N,N,N′,N′,N′′,N′′-Hexamethylguanidinium 1,1,3,3-tetracyanoprop-2-en-1-ide

Directory of Open Access Journals (Sweden)

Ioannis Tiritiris

2016-03-01

Full Text Available The asymmetric unit of the title salt, C7H18N3+·C7HN4−, comprises one cation and one anion. The N,N,N′,N′,N′′,N′′-hexamethylguanidinium ion shows orientational disorder and two sets of N- and C-atom positions were found, with an occupancy ratio of 0.535 (3:0.465 (3. The C—N bond lengths in the guanidinium ion range from 1.339 (16 to 1.35 (2 Å, indicating partial double-bond character pointing towards charge delocalization within the NCN planes. The negative charge in the 1,1,3,3-tetracyanoprop-2-en-1-ide ion is delocalized within the CCC planes with the C—C bonds ranging in length from 1.379 (3 to 1.427 (3 Å, also indicating partial double-bond character.

Crystal structures and spectroscopic properties of 2¿3 phospha-1,3-dionates and 1,3-dionates of calcium ¿ comparative studies on the 1,3-diphenyl- and 1,3-Di(tert-butyl) derivatives¿

NARCIS (Netherlands)

Becker, Gerd; Niemeyer, Mark; Mundt, Otto; Schwarz, Wolfgang; Westerhausen, Matthias; Ossberger, Manfred W.; Mayer, Peter; Nöth, Heinrich; Zhong, Zhiyuan; Dijkstra, Pieter J.; Feijen, Jan

2004-01-01

Der Wasserstoff-Metall-Austausch zwischen Dibenzoylphosphan und Calciumcarbid in Tetrahydrofuran (THF) ergibt nach Zusatz des Liganden 1, 3, 5-Trimethyl-1, 3, 5-triazinan (TMTA) den als Kokristallisat mit Benzol isolierten zweikernigen Komplex Bis[(tmta-N, N, N)calcium-bis(dibenzoylphosphanid)

Hydrogenolysis of 2-tosyloxy-1,3-propanediol into 1,3-propanediol over Raney Ni catalyst

Energy Technology Data Exchange (ETDEWEB)

Zhi, Zheng; Jianli, Wang; Zhen, Lu; Min, Luo; Miao, Zhang; Lixin, Xu; Jianbing [Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou (China)

2013-03-15

2-Tosyloxy-1,3-propanediol (TPD), a potential precursor for 1,3-propanediol (1,3-PD) production, is produced by the tosylation of glycerol with the help of protecting group techniques. In this work, the hydrogenolysis of TPD into 1,3-PD over Raney Ni catalyst is discussed at different reaction parameters to optimize the reaction conditions for selective formation of 1,3-PD. The mechanisms of the hydrogenolysis of TPD and the side reactions were also confirmed by gas chromatography-mass spectrometry (GC-MS) technique (author)

Lithium Diffusion and Magnetism in Battery Cathode Material LixNi1/3Co1/3Mn1/3O2

International Nuclear Information System (INIS)

Månsson, M; Prša, K; Nozaki, H; Sugiyama, J; Wikberg, J M; Sassa, Y; Dahbi, M; Kamazawa, K; Sedlak, K; Watanabe, I

2014-01-01

We have studied low-temperature magnetic properties as well as high-temperature lithium ion diffusion in the battery cathode materials Li x Ni 1/3 Co 1/3 Mn 1/3 O 2 by the use of muon spin rotation/relaxation. Our data reveal that the samples enter into a 2D spin-glass state below T SG ≈ 12 K. We further show that lithium diffusion channels become active for T ≥ T diff ∼ 125 K where the Li-ion hopping-rate [v(T)] starts to increase exponentially. Further, v(T) is found to fit very well to an Arrhenius type equation and the activation energy for the diffusion process is extracted as E a ≈ 100 meV

3-3-1 models at electroweak scale

International Nuclear Information System (INIS)

Dias, Alex G.; Montero, J.C.; Pleitez, V.

2006-01-01

We show that in 3-3-1 models there exist a natural relation among the SU(3) L coupling constant g, the electroweak mixing angle θ W , the mass of the W, and one of the vacuum expectation values, which implies that those models can be realized at low energy scales and, in particular, even at the electroweak scale. So that, being that symmetries realized in Nature, new physics may be really just around the corner

A facile synthesis of Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C composites as cathode materials for lithium-ion batteries

International Nuclear Information System (INIS)

Yang, Rong; Wang, Liqing; Deng, Kunfa; Lv, Mengni; Xu, Yunhua

2016-01-01

The novel Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C has been successfully synthesized by a feasible solution process in ternary system. The spherical carbon-coated composites are obtained using a heat treatment in the presence of sucrose. X-ray diffraction (XRD) diffractogram displays that the Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C crystallized in an orthorhombic structure with a space group of Pmn21. The energy-dispersive X-ray spectroscopy mappings indicate that Fe, Mn and Ni elements are distributed homogenously in Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C nano-spherical particle with size less than 50 nm. The lithium storage capacity and cycling performance of the Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C presents good results when tested as cathode materials in lithium cells at room temperature. It delivers an initial discharge capacity of 181.4 mAh g"−"1 and a discharge capacity of 172.9 mAh g"−"1 after 20 cycles at 0.1C in the voltage range of 1.5–4.6V. Furthermore, it also exhibits an excellent rate capability with a capacity under different current densities of about 144.0 mAh g"−"1 (0.2 C), 117.9 mAh g"−"1 (0.5 C), 106.1 mAh g"−"1 (1 C), respectively and a good capacity cycling maintenance of 153.7 mAh g"−"1 after 60 cycles. Above results indicate that the spherical Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C becomes a very promising candidate for cathode material in lithium-ion batteries. - Highlights: • Li_2Fe_1_/_3Mn_1_/_3Ni_1_/_3SiO_4/C was obtained by solution process in a ternary system. • The material was pure phase ternary solid solution with tetrahedral morphology. • The spherical particle size was less than 50 nm with graphitized carbon coating. • The nanocomposite revealed high discharge capacity and excellent rate capability.

Incidence of infection in 39-month-old ewes with TMEM154 diplotypes "1 1," "1 3," and "3 3" after natural exposure to ovine progressive pneumonia virus.

Science.gov (United States)

Leymaster, K A; Chitko-McKown, C G; Heaton, M P

2015-01-01

Production and well-being of sheep and goats in many countries are harmfully impacted by small ruminant lentiviruses (SRLV) that cause incurable, progressive diseases. Susceptibility to ovine progressive pneumonia virus (OPPV), the North American form of SRLV, is influenced by variants of the ovine transmembrane protein 154 gene (TMEM154). The experimental objective was to estimate additive and dominance effects of TMEM154 haplotypes 1 and 3 on susceptibility of breeding ewes to infection after natural exposure to OPPV from birth to 39 mo of age. Sires and dams were heterozygous for TMEM154 haplotypes 1 and 3, producing ewe lambs with diplotypes "1 1," "1 3," and "3 3." These lambs were raised by mature, infected dams to ensure natural, maternal exposure to OPPV. Ewe lambs (n = 108) were kept for breeding and joined an infected flock of ewes to guarantee natural, nonmaternal exposure to OPPV. Ewes were bred to lamb at 1, 2, and 3 yr of age. Serum samples were collected at breeding, 1 mo before lambing and shortly after weaning each year to monitor infection status to 39 mo of age. During the experiment, 9 of the 108 ewes died while uninfected and data collected on these ewes were not analyzed. Infection status of the remaining 99 ewes at 39 mo of age was analyzed using logistic regression procedures. Effects of ewe type of birth, ewe type of rearing, and breed type of dam were not detected (P > 0.10), and the estimated sire variance component was nil. Ewe diplotype affected infection status (P ewes with diplotypes "1 1," "1 3," and "3 3" were 0.10, 0.88, and 0.89, respectively, and confidence intervals for diplotypes "1 3" and "3 3" were distinct from "1 1." Haplotype 3 was completely dominant to haplotype 1 at 39 mo of age. The probability of infection for ewes with either diplotype "1 3" or "3 3" averaged 8.5 times that of ewes with diplotype "1 1." Diplotype "1 3" and "3 3" ewes were highly susceptible to nonmaternal transmission of OPPV, in contrast to

Synthesis of (3R)-3-(4-fluorophenylsulfonamido)-1,2,3,4-tetra-hydro-9-[4-3H] carbazolepropanoic acid

International Nuclear Information System (INIS)

Pleiss, Ulrich; Radtke, Martin; Schmitt, Peter

1990-01-01

(3R)-3-(4-Fluorophenylsulfonamido)-1,2,3,4-tetrahydro-9-[4- 3 H]carbazolepropanoic acid ( [ 3 H]BAY u 3405) (5) was synthesized by catalytic reduction of (3R)-3-(4-fluorophenylsulfonamido)-4-oxo-1,2,3,4-tetrahydro-9-carbazolepropanoic acid (4) with tritium. The precursor (4) was prepared by esterification and following oxidation of BAY u 3405 with 2,3-dichloro-5,6-dicyano-p-benzoquinone. 3 H NMR analysis of the final product showed the formation of [4α- 3 H]BAY us 3405 and [4β- 3 H]BAY u 3405 in a ratio of 1:1. (author)

Uncovering a facile large-scale synthesis of LiNi1/3Co1/3Mn1/3O2 nanoflowers for high power lithium-ion batteries

Science.gov (United States)

Hua, Wei-Bo; Guo, Xiao-Dong; Zheng, Zhuo; Wang, Yan-Jie; Zhong, Ben-He; Fang, Baizeng; Wang, Jia-Zhao; Chou, Shu-Lei; Liu, Heng

2015-02-01

Developing advanced electrode materials that deliver high energy at ultra-fast charge and discharge rates are very crucial to meet an increasing large-scale market demand for high power lithium ion batteries (LIBs). A three-dimensional (3D) nanoflower structure is successfully developed in the large-scale synthesis of LiNi1/3Co1/3Mn1/3O2 material for the first time. The fast co-precipitation is the key technique to prepare the nanoflower structure in our method. After heat treatment, the obtained LiNi1/3Co1/3Mn1/3O2 nanoflowers (NL333) pronouncedly present a pristine flower-like nano-architecture and provide fast pathways for the transport of Li-ions and electrons. As a cathode material in a LIB, the prepared NL333 electrode demonstrates an outstanding high-rate capability. Particularly, in a narrow voltage range of 2.7-4.3 V, the discharge capacity at an ultra-fast charge-discharge rate (20C) is up to 126 mAh g-1, which reaches 78% of that at 0.2C, and is much higher than that (i.e., 44.17%) of the traditional bulk LiNi1/3Co1/3Mn1/3O2.

Conformational analysis and global warming potentials of 1,1,1,3,3,3-hexafluoro-2-propanol from absorption spectroscopy

Science.gov (United States)

Godin, Paul J.; Le Bris, Karine; Strong, Kimberly

2017-12-01

Absorption cross-sections of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) were derived from Fourier transform infrared spectra recorded from 530 to 3400 cm-1 with a resolution of 0.1 cm-1 over a temperature range of 300-362 K. These results were compared to previously published experimental measurements made at room temperature and to a theoretical spectrum from density functional theory (DFT) calculations. Good agreement is found between the experimentally derived results, DFT calculations, and previously published data. The only temperature dependence observed was in the amplitude of some of the absorption peaks due to the changing ratio of the stable conformations of HFIP. This temperature dependence does not result in a significant trend in integrated band strength as a function of temperature. The average value for integrated band strength is found to be (2.649 ± 0.065)x10-16 cm molecule-1 for HFIP over the spectral range of 595 to 3010 cm-1. Radiative efficiency (RE) and the global warming potential (GWP) for HFIP were also derived. A RE of 0.293 ± 0.059 Wm-2ppbv-1 is derived, which leads to a GWP100 of 188 in the range of 530 to 3000 cm-1. The DFT calculation is linearly adjusted to match the experimental spectrum. Using this adjusted DFT spectrum to expand the range below 530 to 0 cm-1 , increases the RE to 0.317 ± 0.063 Wm-2ppbv-1 and the GWP100 to 203.

12 CFR 3.1 - Authority.

Science.gov (United States)

2010-01-01

... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Authority. 3.1 Section 3.1 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY MINIMUM CAPITAL RATIOS; ISSUANCE OF DIRECTIVES Authority and Definitions § 3.1 Authority. This part is issued under the authority of 12 U.S.C. 1 et seq...

Crystal structures of 2-methoxyisoindoline-1,3-dione, 1,3-dioxoisoindolin-2-yl methyl carbonate and 1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-2-yl methyl carbonate: three anticonvulsant compounds

Directory of Open Access Journals (Sweden)

Fortune Ezemobi

2014-12-01

Full Text Available The title compounds, C9H7NO3, (1, C10H7NO5, (2, and C14H9NO5, (3, are three potentially anticonvulsant compounds. Compounds (1 and (2 are isoindoline derivatives and (3 is an isoquinoline derivative. Compounds (2 and (3 crystallize with two independent molecules (A and B in their asymmetric units. In all three cases, the isoindoline and benzoisoquinoline moieties are planar [r.m.s. deviations are 0.021 Å for (1, 0.04 and 0.018 Å for (2, and 0.033 and 0.041 Å for (3]. The substituents attached to the N atom are almost perpendicular to the mean planes of the heterocycles, with dihedral angles of 89.7 (3° for the N—O—Cmethyl group in (1, 71.01 (4 and 80.00 (4° for the N—O—C(=OO—Cmethyl groups in (2, and 75.62 (14 and 74.13 (4° for the same groups in (3. In the crystal of (1, there are unusual intermolecular C=O...C contacts of 2.794 (1 and 2.873 (1 Å present in molecules A and B, respectively. There are also C—H...O hydrogen bonds and π–π interactions [inter-centroid distance = 3.407 (3 Å] present, forming slabs lying parallel to (001. In the crystal of (2, the A and B molecules are linked by C—H...O hydrogen bonds, forming slabs parallel to (10-1, which are in turn linked via a number of π–π interactions [the most significant centroid–centroid distances are 3.4202 (7 and 3.5445 (7 Å], forming a three-dimensional structure. In the crystal of (3, the A and B molecules are linked via C—H...O hydrogen bonds, forming a three-dimensional structure, which is consolidated by π–π interactions [the most significant inter-centroid distances are 3.575 (3 and 3.578 (3 Å].

Fragrance material review on 1-(3,3-dimethylcyclohexyl)pent-4-en-1-one.

Science.gov (United States)

Scognamiglio, J; Letizia, C S; Api, A M

2013-12-01

A toxicologic and dermatologic review of 1-(3,3-dimethylcyclohexyl)pent-4-en-1-one when used as a fragrance ingredient is presented. 1-(3,3-Dimethylcyclohexyl)pent-4-en-1-one is a member of the fragrance structural group Alkyl Cyclic Ketones. These fragrances can be described as being composed of an alkyl, R1, and various substituted and bicyclic saturated or unsaturated cyclic hydrocarbons, R2, in which one of the rings may include up to 12 carbons. Alternatively, R2 may be a carbon bridge of C2-C4 carbon chain length between the ketone and cyclic hydrocarbon. This review contains a detailed summary of all available toxicology and dermatology papers that are related to this individual fragrance ingredient and is not intended as a stand-alone document. Available data for 1-(3,3-dimethylcyclohexyl)pent-4-en-1-one were evaluated then summarized and includes physical properties, acute toxicity, skin irritation, mucous membrane (eye) irritation, skin sensitization, elicitation, repeated dose, and genotoxicity data. A safety assessment of the entire Alkyl Cyclic Ketones will be published simultaneously with this document; please refer to Belsito et al. (Belsito, D., Bickers, D., Bruze, M., Calow, P., Dagli, M., Fryer, A.D., Greim, H., Miyachi, Y., Saurat, J.H., Sipes, I.G., 2013. A toxicologic and dermatologic assessment of alkyl cyclic ketones when used as fragrance ingredients (submitted for publication) for an overall assessment of the safe use of this material and all Alkyl Cyclic Ketones in fragrances. Copyright © 2013 Elsevier Ltd. All rights reserved.

When Ethyl Isocyanoacetate Meets Isatins: A 1,3-Dipolar/Inverse 1,3-Dipolar/Olefination Reaction for Access to 3-Ylideneoxindoles.

Science.gov (United States)

Yuan, Wen-Kui; Cui, Tao; Liu, Wei; Wen, Li-Rong; Li, Ming

2018-03-16

A new CuI/1,10-phen-catalyzed reaction for the synthesis of 3-ylideneoxindoles from readily available isatins and ethyl isocyanoacetate, in which ethyl isocyanoacetate acts as a latent two-carbon donor like the Wittig reagent, is reported. A tandem procedure including 1,3-dipolar cycloaddition/inverse 1,3-dipolar ring opening/olefination allows the preparation of 3-ylideneoxindoles with broad functional group tolerance.

Organic anion transporter 3- and organic anion transporting polypeptides 1B1- and 1B3-mediated transport of catalposide

Directory of Open Access Journals (Sweden)

Jeong HU

2015-01-01

Full Text Available Hyeon-Uk Jeong,1 Mihwa Kwon,2 Yongnam Lee,3 Ji Seok Yoo,3 Dae Hee Shin,3 Im-Sook Song,2 Hye Suk Lee1 1College of Pharmacy, The Catholic University of Korea, Bucheon 420-743, Korea; 2College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 702-701, Korea; 3Central R&D Institute, Yungjin Pharm Co., Ltd., Suwon 443-270, Korea Abstract: We investigated the in vitro transport characteristics of catalposide in HEK293 cells overexpressing organic anion transporter 1 (OAT1, OAT3, organic anion transporting polypeptide 1B1 (OATP1B1, OATP1B3, organic cation transporter 1 (OCT1, OCT2, P-glycoprotein (P-gp, and breast cancer resistance protein (BCRP. The transport mechanism of catalposide was investigated in HEK293 and LLC-PK1 cells overexpressing the relevant transporters. The uptake of catalposide was 319-, 13.6-, and 9.3-fold greater in HEK293 cells overexpressing OAT3, OATP1B1, and OATP1B3 transporters, respectively, than in HEK293 control cells. The increased uptake of catalposide via the OAT3, OATP1B1, and OATP1B3 transporters was decreased to basal levels in the presence of representative inhibitors such as probenecid, furosemide, and cimetidine (for OAT3 and cyclosporin A, gemfibrozil, and rifampin (for OATP1B1 and OATP1B3. The concentration-dependent OAT3-mediated uptake of catalposide revealed the following kinetic parameters: Michaelis constant (Km =41.5 µM, maximum uptake rate (Vmax =46.2 pmol/minute, and intrinsic clearance (CLint =1.11 µL/minute. OATP1B1- and OATP1B3-mediated catalposide uptake also showed concentration dependency, with low CLint values of 0.035 and 0.034 µL/minute, respectively. However, the OCT1, OCT2, OAT1, P-gp, and BCRP transporters were apparently not involved in the uptake of catalposide into cells. In addition, catalposide inhibited the transport activities of OAT3, OATP1B1, and OATP1B3 with half-maximal inhibitory concentration values of 83, 200, and 235 µ

5-(4-Bromophenyl-2-(3,4-methylenedioxyphenyl-3-methylsulfanyl-1-benzofuran

Directory of Open Access Journals (Sweden)

Hong Dae Choi

2009-10-01

Full Text Available The title compound, C22H15BrO3S, crystallizes with four molecules in the asymmetric unit. The 4-bromophenyl rings are rotated out of the benzofuran planes, with dihedral angles for the four molecules of 20.8 (2, 17.8 (2, 23.5 (4 and 23.9 (4°. The dihedral angles between the 3,4-methylenedioxyphenyl ring and the benzofuran plane are 13.5 (2, 7.1 (2, 18.6 (3 and 14.2 (3° in the four molecules. The crystal structure is stabilized by weak nonclassical intermolecular C—H...O hydrogen bonds. The crystal structure also exhibits intermolecular aromatic π–π interactions between the benzene and furan rings and between the 4-bromophenyl and 3,4-methylenedioxyphenyl rings from molecules of the same type; the centroid–centroid distances are 3.92 (1 and 3.79 (1, 3.91 (1, 3.77 (1 and 3.77 (1, and 3.79 (1 and 3.75 (1Å in the four molecules.

1-(3-Bromopropylindoline-2,3-dione

Directory of Open Access Journals (Sweden)

Fatima Zahrae Qachchachi

2016-04-01

Full Text Available In the title compound, C11H10BrNO2, the indoline ring system has an r.m.s. deviation of 0.026 Å. The side chain (including the Br atom has a trans–gauche conformation, as indicated by the N—C—C—C and C—C—C—Br torsion angles of −177.5 (3 and 68.1 (3°, respectively. In the crystal, molecules are linked by weak C—H...O hydrogen bonds, forming a three-dimensional network.

Electric Properties of Pb(Sb1/2Nb1/2)O3 PbTiO3 PbZrO3 Ceramics

Science.gov (United States)

Kawamura, Yasushi; Ohuchi, Hiromu

1994-09-01

Solid-solution ceramics of ternary system xPb(Sb1/2Nb1/2)O3 yPbTiO3 zPbZrO3 were prepared by the solid-state reaction of powder materials. Ceramic, electric, dielectric and piezoelectric properties and crystal structures of the system were studied. Sintering of the system xPb(Sb1/2Nb1/2)O3 yPbTiO3 zPbZrO3 is much easier than that of each end composition, and well-sintered high-density ceramics were obtained for the compositions near the morphotropic transformation. Piezoelectric ceramics with high relative dielectric constants, high radial coupling coefficient and low resonant resistance were obtained for the composition near the morphotropic transformation. The composition Pb(Sb1/2Nb1/2)0.075Ti0.45Zr0.475O3 showed the highest dielectric constant (ɛr=1690), and the composition Pb(Sb1/2Nb1/2)0.05Ti0.45Zr0.5O3 showed the highest radial coupling coefficient (kp=64%).

Electrical transport in low-lead (1-x)BaTiO3–xPbMg1/3Nb2/3O3 ceramics

Institute of Scientific and Technical Information of China (English)

J. SUCHANICZ; K. KONIECZNY; K. ŚWIERCZEK; M. LIPIŃSKI; M. KARPIERZ; D. SITKO; H. CZTERNASTEK; K. KLUCZEWSKA

2017-01-01

Low-lead (1-x)BaTiO3–xPbMg1/3Nb2/3O3 ceramics (x = 0, 0.025, 0.05, 0.075, 0.1, and 0.15) were prepared by the conventional oxide mixed sintering process, and their optical band gap, Seebeck coefficient, ac ( σac ) and dc ( σdc ) conductivities as a function of temperature were investigated for the first time. It was found that all samples have p-type conductivity. The low-frequency (20 Hz–2 MHz) ac conductivity obeys a power law σac ~ ωs , which is characteristic for disordered materials. The frequency exponent s is a decreasing function of temperature and tends to zero at high temperature. σac is proportional to ω0.07 – ω0.31 in the low-frequency region and to ω0.51 – ω0.98 in the high-temperature region. The temperature dependence of the dc conductivity showed a change in slope around the temperature at which the phase transition appeared. Both ac and dc conductivities showed a thermally activated character and possessed linear parts with different activation energies and some irregular changes. It was found that the hopping charge carriers dominate at low temperature and small polarons and oxygen vacancies dominate at higher temperature. (1-x)BaTiO3–xPbMg1/3Nb2/3O3 ceramics are expected to be promising new candidate for low-lead electronic materials.

Influence of water management and fertilizer application on "1"3"7Cs and "1"3"3Cs uptake in paddy rice fields

International Nuclear Information System (INIS)

Wakabayashi, Shokichi; Itoh, Sumio; Kihou, Nobuharu; Matsunami, Hisaya; Hachinohe, Mayumi; Hamamatsu, Shioka; Takahashi, Shigeru

2016-01-01

Cesium-137 derived from the Tokyo Electric Power Company's Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident contaminated large areas of agricultural land in Eastern Japan. Previous studies before the accident have indicated that flooding enhances radiocesium uptake in rice fields. We investigated the influence of water management in combination with fertilizers on "1"3"7Cs concentrations in rice plants at two fields in southern Ibaraki Prefecture. Stable Cs ("1"3"3Cs) in the plants was also determined as an analogue for predicting "1"3"7Cs behavior after long-term aging of soil "1"3"7Cs. The experimental periods comprised 3 y starting from 2012 in one field, and 2 y from 2013 in another field. These fields were divided into three water management sections: a long-flooding section without midsummer drainage, and medial-flooding, and short-flooding sections with one- or two-week midsummer drainage and earlier end of flooding than the long-flooding section. Six or four types of fertilizer subsections (most differing only in potassium application) were nested in each water management section. Generally, the long-flooding treatment led to higher "1"3"7Cs and "1"3"3Cs concentrations in both straw and brown rice than medial- and short-flooding treatments, although there were some notable exceptions in the first experimental year at each site. Effects of differing potassium fertilizer treatments were cumulative; the effects on "1"3"7Cs and "1"3"3Cs concentrations in rice plants were not obvious in 2012 and 2013, but in 2014, these concentrations were highest where potassium fertilizer had been absent and lowest where basal dressings of K had been tripled. The relationship between "1"3"7Cs and "1"3"3Cs in rice plants was not correlative in the first experimental year at each site, but correlation became evident in the subsequent year(s). This study demonstrates a novel finding that omitting midsummer drainage and/or delaying drainage during the grain-filling period

Toxicological evaluation of two novel bitter modifying flavour compounds: 3-(1-((3,5-dimethylisoxazol-4-ylmethyl-1H-pyrazol-4-yl-1-(3-hydroxybenzylimidazolidine-2,4-dione and 3-(1-((3,5-dimethylisoxazol-4-ylmethyl-1H-pyrazol-4-yl-1-(3-hydroxybenzyl-5,5-dimethylimidazolidine-2,4-dione

Directory of Open Access Journals (Sweden)

Donald S. Karanewsky

Full Text Available A toxicological evaluation of two novel bitter modifying flavour compounds, 3-(1-((3,5-dimethylisoxazol-4-ylmethyl-1H-pyrazol-4-yl-1-(3-hydroxybenzylimidazolidine-2,4-dione (S6821, CAS 1119831-25-2 and 3-(1-((3,5-dimethylisoxazol-4-ylmethyl-1H-pyrazol-4-yl-1-(3-hydroxybenzyl-5,5-dimethylimidazolidine-2,4-dione (S7958, CAS 1217341-48-4, were completed for the purpose of assessing their safety for use in food and beverage applications. S6821 undergoes oxidative metabolism in vitro, and in rat pharmacokinetic studies both S6821 and S7958 are rapidly converted to the corresponding O-sulfate and O-glucuronide conjugates. S6821 was not found to be mutagenic or clastogenic in vitro, and did not induce micronuclei in bone marrow polychromatic erythrocytes in vivo. S7958, a close structural analog of S6821, was also found to be non-mutagenic in vitro. In short term and subchronic oral toxicity studies in rats, the no-observed-adverse-effect-level (NOAEL for both S7958 and S6821 was 100 mg/kg bw/day (highest dose tested when administered as a food ad-mix for either 28 or 90 consecutive days, respectively. Furthermore, S6821 demonstrated a lack of maternal toxicity, as well as adverse effects on fetal morphology at the highest dose tested, providing a NOAEL of 1000 mg/kg bw/day for both maternal toxicity and embryo/fetal development when administered orally during gestation to pregnant rats. Keywords: S6821, S7958, FEMA GRAS, Subchronic toxicological evaluation, Genetic toxicological evaluation

Pressure-induced amorphization of La1/3TaO3

International Nuclear Information System (INIS)

Noked, O.; Melchior, A.; Shuker, R.; Livneh, T.; Steininger, R.; Kennedy, B.J.; Sterer, E.

2013-01-01

La 1/3 TaO 3 , an A-site cation deficient perovskite, has been studied under pressure by synchrotron X-ray powder diffraction and Raman spectroscopy. It undergoes irreversible pressure induced amorphization at P=18.5 GPa. An almost linear unit cell volume decrease vs. pressure is observed from ambient pressure up to the phase transition. The Raman spectroscopy also shows amorphization at the same pressure, with positive shifts of all modes as a function of pressure. The pressure dependence of the E g and A 1g Raman modes arising from the octahedral oxygen network is discussed. - Graphical abstract: La 1/3 Tao 3 exhibits linear pressure–volume relation until irreversible pressure induced amorphization at 18.5 Gpa. - Highlights: • La 1/3 TaO 3 has been studied under pressure by synchrotron XRD and Raman spectroscopy. • La 1/3 TaO 3 undergoes irreversible pressure induced amorphization around 18.5 GPa. • The transition is manifested in both XRD and Raman measurements. • A linear P–V relation is observed from ambient pressure up to the phase transition

Preparation of YBa2Cu3O7-δ powders by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)1/3(H2O)3

International Nuclear Information System (INIS)

Hasegawa, E.; Aono, H.; Sadaoka, Y.; Traversa, E.

1999-01-01

YBa 2 Cu 3 O 7-δ powders were prepared by the thermal decomposition of a heteronuclear complex, CuY 1/3 Ba 2/3 (dhbaen)(NO 3 ) 1/3 (H 2 O) 3 . The products of the complex thermal decomposition were analyzed by TG-DTA, XRD, SEM-Auger and XPS. The decomposition of the CuY 1/3 Ba 2/3 -complex was obtained at about 500 C and the product was a mixture of oxides and carbonates. The formation of YBa 2 Cu 3 O 7-δ proceeded at 800 C, with a gradual decomposition of the carbonates. A homogeneous distribution of each element, Y, Ba, and Cu, was observed for the decomposed CuY 1/3 Ba 2/3 -complex by SEM-Auger analysis. The binding energy values of Ba3d 5/2 and O1s photolines from Ba and O in the superconductive lattice did not shift during the sputtering period. Furthermore, the formation of Ba rich regions on the surface was depressed by using the complex as a starting material for homogeneous 123-oxide, YBa 2 Cu 3 O 7-δ . (orig.)

Spin glass transition in the rhombohedral LiNi1/3Mn1/3Co1/3O2

International Nuclear Information System (INIS)

Bie, Xiaofei; Yang, Xu; Han, Bing; Chen, Nan; Liu, Lina; Wei, Yingjin; Wang, Chunzhong; Chen, Hong; Du, Fei; Chen, Gang

2013-01-01

Highlights: •The Rietveld analysis of XRD data reveals a single phase with rhombohedral structure. •Dc susceptibility data suggest a spin glass behavior at low T in the 333 compound. •The ac susceptibility measurements have been observed in the typical SG system. •Three models have been employed to study the behavior of the spin glass state. •Both geometrical frustration and disorder play important role in the formation of SG. -- Abstract: Layered LiNi 1/3 Mn 1/3 Co 1/3 O 2 has been synthesized by co-precipitation method, and the magnetic properties were comprehensively studied by dc and ac susceptibilities. The dc magnetization curves show the irreversibility and spin freezing behavior at 109 K and 9 K. The evolution of real and imaginary part of ac susceptibility under different frequencies indicates a spin glass transition at low temperature. Three models (the Néel–Arrhenius law, the Vogel–Fulcher law, and the power law) have been employed to study the relaxation behavior of the spin glass state. Both frustration and disorder play important role in the formation of spin glass

Synthesis of the mono- and di(4-(1,1,3,3-tetramethylbutyl)) phosphoric acids

International Nuclear Information System (INIS)

Elias, H.; Zaoui, A.; Attou, M.; Hadj Bachir, D.; Bouzidi, N.; Didi, M.

1995-09-01

This work is related to the synthesis of organophosphorus extracting agents used in purification of heavy metals such as uranium. The mono- and di (4-(1,1,3,3- tetramethylbutyl)) phenyl phosphoric acids, respectively MOPPA and DOPPA, are synthesizd by reaction of phosphorus pentoxid with 4(1,1,3,3-tetramethylbuthyl)) phenol. the separation of MOPPA from DOPPA is realised by liquid-liquid extraction. The Characterization, carried out by infrared uv-visible spectrophotometries, ph-metry and mass spectrometry, has confirmed the identity of the synthesized products. This study also showed that the products proportions are comporable to those of the homologous products obtained with 2-ethylbexanol in the same synthesis conditions

Microwave assisted synthesis and antimicrobial activity of novel 1-[1/2-(1-Benzyl-1H-[1,2,3]triazol-4-ylmethoxy-naphthalen-2/1-yl]-3-(1-phenyl-3-aryl-1H-pyrazol-4-yl-propenones

Directory of Open Access Journals (Sweden)

Dongamanti Ashok

2015-06-01

Full Text Available A series of novel 1-[1/2-(1-Benzyl-1H-[1,2,3]triazol-4-ylmethoxy-naphthalen-2/1-yl]-3-(1-phenyl-3-aryl-1H-pyrazol-4-yl-propenones were design and synthesized by Click reaction followed by Claisen-Schmidt condensation under microwave irradiation and conventional heating methods. The structures of newly synthesized compounds have been established on the basis of elemental analysis, IR, 1H & 13C NMR and mass spectral data. All the compounds were screened for their antimicrobial activity.

Beam-Mode Piezoelectric Properties of Ternary Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals for Medical Linear Array Applications

Science.gov (United States)

Wang, Wei; Wang, Sheng; Zhang, Yaoyao; Zhao, Xiangyong; Luo, Haosu

2011-11-01

In this work, the dielectric and beam-mode piezoelectric properties of ternary 0.35Pb(In1/2Nb1/2)O3-0.35Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 (PIMNT35/35/30) piezoelectric single crystals were investigated. The Curie temperature ( T C) and rhombohedral-to-tetragonal phase-transition temperature ( T rt) are 187°C and 127°C, about 30°C higher than those of PMNT crystals. The beam-mode coupling coefficient k {33/ w } was found to be 90.3%. Furthermore, 3.5-MHz linear arrays based on PIMNT35/35/30 crystals and Pb(Zr1- x Ti x )O3 ceramic (PZT-5H) were simulated using PiezoCAD software. The results indicate that the sensitivity and -6 dB bandwidth of a PIMNT35/35/30 transducer would be approximately 4 dB and 20% higher, respectively, compared with a traditional PZT transducer.

Synthesis and physical-chemical properties of 6-(5-(1Н-tetrazole-1-ylmethyl-4-R-1,2,4-triazole-3-ylthiopyridin-3-amines and 6-((5-(1Н-tetrazole-1-ylmethil-4-R-1,2,4-triazole-3-ylthiopyridin-3-yl-(alk,ar,heterylmethanimines

Directory of Open Access Journals (Sweden)

Yu. S. Hulina

2017-02-01

Full Text Available Over the past decade the number of publications, that contain different aspects of chemistry and use of triazoles and tetrazoles have been doubled and continues to grow. Puplications of recent years show that heterocycles with 1,2,3,4-teterazoles and 1,2,4-triazoles are biologically active compounds with a broad spectrum of action. This fact indicates the interest to these compounds as potential objects of modern pharmaceutical market, namely to those compounds which contain both heterocycles. Purpose – synthesis and establishment of physical-chemical properties of 6-(5-(1Н-tetrazole-1-ylmethyl-4-R-1,2,4-triazole-3-ylthiopyridin-3-amines and 6-((5-(1Н-tetrazole-1-ylmethil-4-R-1,2,4-triazole-3-ylthiopyridin-3-yl-(alk,ar,heterylmethanimines. Materials and methods. The melting point has been determined by capillary method. The elemental composition of compounds has been set with the help of elemental analyzer Elementar Vario L cube (CHNS. 1H NMR spectra of obtained compounds has been set with the help of Varian Mercury VX-200, solvent – DMSO-d6, internal standart – Tetramethylsilane. Chromatography-mass spectrometry studies have been conducted on gas-liquid chromatograph Agilent 1260 Infinity HPLC equipped with a mass spectrometer Agilent 6120. 5-(1H-Tetrazole-1-ylmethyl-4-R-1,2,4-triazole-3-thioles were used as starting materials for 6-(5-(1Н-tetrazole-1-ylmethyl-4-R-1,2,4-triazole-3-ylthiopyridin-3-amines. Synthesis of the compounds was carried out in a medium of propyl alcohol in the presence of 5-amino-2-chloropyridine. 6-((5-(1Н-tetrazole-1-ylmethil-4-R-1,2,4-triazole-3-ylthiopyridin-3-yl-(alk,ar,heterylmethanimines were obtained reacting 6-(5-(1Н-tetrazole-1-ylmethyl-4-R-1,2,4-triazole-3-ylthiopyridin-3-amines with the appropriate aldehydes (acetaldehyde, m-anisaldehyde, 2-hydroxybenzaldehyde, 3-fluorobenzaldehyde, 4-fluorobenzaldehyde, 4-diethylaminobenzaldehyd, hydroxynaphthalene in the acetic acid medium. Results. 11 New

5-Isopropylidene-1,3-dithiolo[4,5-d][1,3]dithiole-2-thione

Directory of Open Access Journals (Sweden)

Yoshiro Yamashita

2009-05-01

Full Text Available The title compound, C7H6S5, contains a 5-ylidene-1,3-dithiolo[4,5-d][1,3]dithiole-2-thione framework, which is an important synthetic precursor of multi-dimensional organic superconductors and conductors. The molecular framework is planar with an r.m.s. deviation of 0.012 Å for the non-H atoms. In the crystal structure, molecules are linked by short intermolecular S...S interactions [3.501 (5 and 3.581 (4 Å], constructing a zigzag molecular tape network along the c axis.

(PO_4)"3"− polyanions doped LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2: An ultrafast-rate, long-life and high-voltage cathode material for Li-ion rechargeable batteries

International Nuclear Information System (INIS)

Cong, Lina; Zhao, Qin; Wang, Zhao; Zhang, Yuhang; Wu, Xinglong; Zhang, Jingping; Wang, Rongshun; Xie, Haiming; Sun, Liqun

2016-01-01

Highlights: • LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 layered structure is doped with (PO_4)"3"− polyanions. • Results confirm that (PO_4)"3"− influences MO_6 octahedral environment in LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 lattice. • Charge–discharge properties are investigated under high voltage battery operation. • Cycling and rate performance of the doped materials is markedly enhanced. • Pre-cycling treatment inhibits microcracks at the grain boundaries at 4.7–2.8 V. - Abstract: Layered compounds LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 have recently received much attention as they have been regarded as a promising cathode materials for industrial application. However, its fast energy density decay and poor rate performance which originate from structure disruption especially at high rate and high cut-off voltage limit its large-scale application. Here, a novel designed concept and facile method were firstly used to fabricate (PO_4)"3"− polyanions doped layered LiNi_1_/_3Co_1_/_3Mn_1_/_3O_2 (LNMC-(PO_4) _0_._0_1_5-O_1_._9_4) structure, which could offer more stable high-voltage cycling performance and high rate capability. We attribute this improved performance to the robust P_t_e_t-O covalence, which will stabilize the oxygen close-packed structure during repeated cycling. Moreover, our stepwise pre-cycling treatments could effectively restrain the formation of micro-cracks and non-crystallization defects, and significantly improve cyclic durability with high charge voltage of 4.7V. The LNMC-(PO_4) _0_._0_1_5-O_1_._9_4 electrode can still delivers capacity retention of 81% after 200 cycles at a current density of 300mA g"−"1. The preliminary results reported here manifest that this novel-designed LNMC-(PO_4) _0_._0_1_5-O_1_._9_4 material represents an attractive alternative to ultrafast-rate, long-life and high-voltage electrode material for lithium ion batteries.

Note: High-power piezoelectric transformer fabricated with ternary relaxor ferroelectric Pb(Mg(1/3)Nb(2/3))O3-Pb(In(1/2)Nb(1/2))O3-PbTiO3 single crystal.

Science.gov (United States)

Wang, Qing; Ma, Chuanguo; Wang, Feifei; Liu, Bao; Chen, Jianwei; Luo, Haosu; Wang, Tao; Shi, Wangzhou

2016-03-01

A plate-shaped piezoelectric transformer was designed and fabricated using ternary relaxor ferroelectric single crystal Pb(Mg(1/3)Nb(2/3))O3-Pb(In(1/2)Nb(1/2))O3-PbTiO3. Both the input and output sections utilized the transverse-extensional vibration mode. The frequency and load dependences of the electrical properties for the proposed transformer were systematically studied. Results indicated that under a matching load resistance of 14.9 kΩ, a maximum output power of 2.56 W was obtained with the temperature rise less than 5 °C. The corresponding power density reached up to 50 W/cm(3). This ternary single-crystal transformer had potential applications in compact-size converters requiring high power density.

2:1 Charge disproportionation in perovskite-structure oxide La{sub 1/3}Ca{sub 2/3}FeO{sub 3} with unusually-high-valence Fe{sup 3.67+}

Energy Technology Data Exchange (ETDEWEB)

Guo, Haichuan; Hosaka, Yoshiteru; Seki, Hayato; Saito, Takashi; Ichikawa, Noriya [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan); Shimakawa, Yuichi, E-mail: shimak@scl.kyoto-u.ac.jp [Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan); Integrated Research Consortium on Chemical Sciences, Uji, Kyoto 611-0011 (Japan)

2017-02-15

La{sub 1/3}Ca{sub 2/3}FeO{sub 3} with unusually-high-valence Fe{sup 3.67+} was synthesized at a high pressure and high temperature. The compound crystallizes in a √2a×2a×√2a perovskite cell in which the La and Ca ions at the A site are disordered. At 217 K the Fe{sup 3.67+} shows charge disproportionation to Fe{sup 3+} and Fe{sup 5+} in a ratio of 2:1, and this disproportionation is accompanied by transitions in magnetic and transport properties. The charge-disproportionated Fe{sup 3+} and Fe{sup 5+} are arranged along the <111> direction of the cubic perovskite cell. The local electronic and magnetic environments of Fe in La{sub 1/3}Ca{sub 2/3}FeO{sub 3} are quite similar to those of Fe in La{sub 1/3}Sr{sub 2/3}FeO{sub 3}, and the 2:1 charge disproportionation pattern of Fe{sup 3+} and Fe{sup 5+} in La{sub 1/3}Ca{sub 2/3}FeO{sub 3} is also the same as that in La{sub 1/3}Sr{sub 2/3}FeO{sub 3}. - Graphical abstract: The perovskite-structure oxide La{sub 1/3}Ca{sub 2/3}FeO{sub 3} with unusually-high-valence Fe{sup 3.67+} shows charge disproportionation to Fe{sup 3+} and Fe{sup 5+} in a ratio of 2:1, and the charge-disproportionated Fe{sup 3+} and Fe{sup 5+} are arranged along the <111> direction of the cubic perovskite cell. - Highlights: • La{sub 1/3}Ca{sub 2/3}FeO{sub 3} with unusually-high-valence Fe{sup 3.67+} was synthesized at a high pressure and high temperature. • At 217 K the Fe{sup 3.67+} shows charge disproportionation (CD) to Fe{sup 3+} and Fe{sup 5+} in a ratio of 2:1. • The charge-disproportionated Fe{sup 3+} and Fe{sup 5+} are arranged along the <111> direction of the cubic perovskite cell. • The disproportionation is accompanied by transitions in magnetic and transport properties.

Effect of Cu Doping on the Structural and Electrochemical Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Materials

Science.gov (United States)

Yang, Li; Ren, Fengzhagn; Feng, Qigao; Xu, Guangri; Li, Xiaobo; Li, Yuanchao; Zhao, Erqing; Ma, Jignjign; Fan, Shumin

2018-04-01

The structural and electrochemical performance of Cu-doped, Li[Ni1/3-xCo1/3 Mn1/3Cux]O2 (x = 0-0.1) cathode materials obtained by means of the sol-gel method are discussed; we used critic acid as gels and spent mixed batteries as the raw materials. The effects of the sintering time, sintering temperature, and Cu doping ratio on the phase structure, morphology, and element composition and the behavior in a galvanostatical charge/discharge test have been systemically studied. The results show that the Cu-doped material exhibits better galvanostatic charge/discharge cycling performance. At 0.2 C, its original discharge specific capacity is 180.4 mAh g-1 and its Coulomb efficiency is 90.3%. The Cu-doped material demonstrate an outstanding specific capacity at 0.2 C, 0.5 C, and 2.0 C. In comparison with the original capacities of 178 mAh g-1, 159.5 mAh g-1, and 119.4 mAh g-1, the discharge capacity after 50 cycles is 160.8 mAh g-1, 143.4 mAh g-1, and 90.1 mAh g-1, respectively. This obvious improvement relative to bare Li[Ni1/3Co1/3Mn1/3]O2 cathode materials arises from an enlarged Li layer spacing and a reduced degree of cation mixing. Therefore, Cu-doped cathode materials have obvious advantages in the field of lithium-ion batteries and their applications.

Tetraphenylphosphonium iodide–1,3,5-trifluoro-2,4,6-triiodobenzene–methanol (3/4/1

Directory of Open Access Journals (Sweden)

Gabriella Cavallo

2013-06-01

Full Text Available The crystallization of a 1:1 molar solution of 1,3,5-trifluoro-2,4,6-diiodobenzene (TFTIB and tetraphenylphosponium iodide (TPPI from methanol produced tetragonal needles of pure TPPI and tabular pseudo-hexagonal truncated bipyramids of the title compound, 3C24H20P+·3I−·4C6F3I3·CH4O or (TPPI3(TFTIB4·MeOH. The asymmetric unit is composed of six TPPI molecules, eight TFTIB molecules and two methanol molecules, overall 16 constituents. The formation of the architecture is essentially guided by a number of C—I...I− halogen bonds (XB, whose lengths are in the range 3.276 (1–3.625 (1 Å. Layers of supramolecular polyanions are formed parallel to (10-1 wherein iodide anions function as penta-, tetra- or bidentate XB acceptors. The structure is not far from being P21/n, but the centrosymmetry is lost due to a different conformation of a single couple of cations and the small asymmetry in the formed supramolecular anion. One methanol molecule is hydrogen bonded to an iodide anion, while the second is linked to the first one via an O—H...O contact. This second methanol molecule is more loosely pinned in its position than the first and presents very high anisotropic displacement parameters and a seeming shortening of the C—O bond length. The crystal studied was refined as a perfect inversion twin.

3,3′′-Bis(9-hydroxyfluoren-9-yl-1,1′:3′,1′′-terphenyl

Directory of Open Access Journals (Sweden)

Konstantinos Skobridis

2013-10-01

Full Text Available The asymmetric unit of the title compound, C44H30O2, contains two independent molecules in which the terminal rings of the terphenyl element are inclined at angles of 36.3 (1 and 22.5 (1° with respect to the central ring and the dihedral angles between the fluorenyl units are 72.3 (1 and 62.8 (1°. In the crystal, pairs of O—H...O hydrogen bonds link the molecules into inversion dimers. The hydroxy H atoms not involved in these hydrogen bonds form O—H...π interactions in which the central terphenyl rings act as acceptors. Weak C—H...O contacts and π–π [centroid–centroid distance = 4.088 (2 Å] stacking interactions also occur. Taking into account directed non-covalent bonding between the molecules, the crystal is constructed of supramolecular strands extending along the a-axis direction.

ATF3 inhibits adipocyte differentiation of 3T3-L1 cells

International Nuclear Information System (INIS)

Jang, Min Kyung; Kim, Cho Hee; Seong, Je Kyung; Jung, Myeong Ho

2012-01-01

Highlights: ► Overexpression of ATF3 inhibits adipocyte differentiation in 3T3-L1 cells. ► Overexpression of ATF3 represses C/EBPα expression. ► ATF3 directly binds to mouse C/EBPα promoter spanning from −1928 to −1907. ► ATF3 may play a role in hypoxia-mediated inhibition of adipocyte differentiation. -- Abstract: ATF3 is a stress-adaptive gene that regulates proliferation or apoptosis under stress conditions. However, the role of ATF3 is unknown in adipocyte cells. Therefore, in this study, we investigated the functional role of ATF3 in adipocytes. Both lentivirus-mediated overexpression of ATF3 and stably-overexpressed ATF3 inhibited adipocyte differentiation in 3T3-L1 cells, as revealed by decreased lipid staining with oil red staining and reduction in adipogenic genes. Thapsigargin treatment and overexpression of ATF3 decreased C/EBPα transcript and repressed the activity of the 3.6-kb mouse C/EBPα promoter, demonstrating that ATF3 downregulates C/EBPα expression. Transfection studies using mutant constructs containing 5′-deletions in the C/EBPα promoter revealed that a putative ATF/CRE element, GGATGTCA, is located between −1921 and −1914. Electrophoretic mobility shift assay and chromatin immunoprecipitation assay demonstrated that ATF3 directly binds to mouse C/EBPα promoter spanning from −1928 to −1907. Both chemical hypoxia-mimetics or physical hypoxia led to reduce the C/EBPα mRNA and repress the promoter activity of the C/EBPα gene, whereas increase ATF3 mRNA, suggesting that ATF3 may contribute to the inhibition of adipocyte differentiation in hypoxia through downregulation of C/EBPα expression. Collectively, these results demonstrate that ATF3 represses the C/EBPα gene, resulting in inhibition of adipocyte differentiation, and thus plays a role in hypoxia-mediated inhibition of adipocyte differentiation.

Fragrance material review on 1-(3,3-dimethylbicyclo[2.2.1]hept-2-yl)ethane-1-one.

Science.gov (United States)

Scognamiglio, J; Letizia, C S; Api, A M

2013-12-01

A toxicologic and dermatologic review of 1-(3,3-dimethylbicyclo[2.2.1]hept-2-yl)ethane-1-one when used as a fragrance ingredient is presented. 1-(3,3-Dimethylbicyclo[2.2.1]hept-2-yl)ethane-1-one is a member of the fragrance structural group Alkyl Cyclic Ketones. These fragrances can be described as being composed of an alkyl, R1, and various substituted and bicyclic saturated or unsaturated cyclic hydrocarbons, R2, in which one of the rings may include up to 12 carbons. Alternatively, R2 may be a carbon bridge of C2-C4 carbon chain length between the ketone and cyclic hydrocarbon. This review contains a detailed summary of all available toxicology and dermatology papers that are related to this individual fragrance ingredient and is not intended as a stand-alone document. Available data for 1-(3,3-dimethylbicyclo[2.2.1]hept-2-yl)ethane-1-one were evaluated then summarized and includes physical properties, skin irritation, mucous membrane (eye) irritation, and skin sensitization data. A safety assessment of the entire Alkyl Cyclic Ketones will be published simultaneously with this document; please refer to Belsito et al. (Belsito, D., Bickers, D., Bruze, M., Calow, P., Dagli, M., Fryer, A.D., Greim, H., Miyachi, Y., Saurat, J.H., Sipes, I.G., 2013. A Toxicologic and Dermatologic Assessment of Alkyl Cyclic Ketones When Used as Fragrance Ingredients (submitted for publication) for an overall assessment of the safe use of this material and all Alkyl Cyclic Ketones in fragrances. Copyright © 2013 Elsevier Ltd. All rights reserved.

Hydrogen storage in MgH2 - LaNi5 nanocomposites produced by cold rolling under inert atmosphere

International Nuclear Information System (INIS)

Marquez, J.J.; Silva, W.B.; Leiva, D.R.; Ishikawa, T.T.; Kiminami, C.S.; Botta, W.J.; Floriano, R.

2016-01-01

In this study, the effects of the addition of LaNi5 in magnesium hydride H-sorption/desorption behavior was addressed. MgH 2 - X mol.% LaNi 5 (X=0.67; 1.50 and 2.54) mixtures were processed by cold rolling (CR) inside a glove box under controlled atmosphere, with oxygen and moisture contents below 0.1 ppm. Structural characterization showed that during the H-absorption/desorption cycles, a mixture of phases consisting of MgH 2 , LaH 3 and Mg 2 NiH 4 is formed, which has an important role in the hydrogen storage kinetic properties. The mixture MgH 2 -1.50 mol.% LaNi 5 was able to absorb/desorb 4.0 wt.% H 2 in less than 15 min at 100 and 280 °C respectively. The DSC analysis showed that the LaNi 5 additive lowers the temperature at which the H-desorption starts in cold rolled MgH 2 by around 50 °C. (author)

Labelling by [sup 14]C and [sup 3]H on 4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-1-pentene-3-ol or stiripentol. Marquage par [sup 14]C et [sup 3]H du 4,4-dimethyl-1-(methylendioxy-3,4 phenyl)-1-petene-3-ol ou stiripentol

Energy Technology Data Exchange (ETDEWEB)

Madelmont, J.C.; Rapp, M.; Labarre, P.; Maurizis, J.C. (Institut National de la Sante et de la Recherche Medicale (INSERM), 63 - Clermont-Ferrand (France)); Dupuy, J.M. (Centre Jean Perrin, Clermont-Ferrand (France)); Lepage, F. (Laboratoires BIOCODEX, Compiegne (France)); Veyre, A. (Clermont-Ferrand-1 Univ., 63 - Aubiere (France))

1992-11-01

4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-1-pentene-3-ol or stiripentol was labelled by [sup 14]C and [sup 3]H. [sup 14]C labelling was performed on the carbon 1 of the pentene group via a four step procedure. The radiochemical yield calculated from the precursor (Ba[sup 14]CO[sub 3]) is 28%. [sup 3]H labelling was performed on the position 3 of the pentene chain by reduction of the corresponding ketone via NaBT[sub 4]. The radiochemical yield calculated from the precursor (NaBT[sub 4]) is 40%. (author).

Structure and magnetic properties of La2/3Sr1/3MnO3/CaMnO3 multilayers

International Nuclear Information System (INIS)

Granada, Mara; Sirena, Martin; Steren, Laura B.; Leyva, Gabriela

2004-01-01

Structural and magnetic properties of manganite-based multilayers, La 2/3 Sr 1/3 MnO 3 /CaMnO 3 , composed of ferromagnetic metals and antiferromagnetic insulator barriers are investigated in this work. Compounds of similar lattice parameters were used to build the samples, so we expect an excellent stacking of the different layers along the structure. To get a first insight of this system, the crystalline structure of a series of samples, grown on (1 0 0) SrTiO 3 and (1 0 0) MgO single-crystalline substrates, has been studied. X-ray diffraction patterns show that the structure is strongly textured in the (1 0 0) direction when grown on SrTiO 3 , regardless the composition of the bottom layer. A different result is found on the same system grown on MgO: when the buffer layer is CaMnO 3 , the structure grows in the (1 1 0) orientation while it grows in the (1 0 0) direction when the bottom layer is La 2/3 Sr 1/3 MnO 3 . Magnetic coupling of the ferromagnetic layers across the antiferromagnetic spacer has been studied with magnetization measurements

Labelling by 14C and 3H on 4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-1-pentene-3-ol or stiripentol

International Nuclear Information System (INIS)

Madelmont, J.C.; Rapp, M.; Labarre, P.; Maurizis, J.C.; Dupuy, J.M.; Lepage, F.; Veyre, A.

1992-01-01

4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-1-pentene-3-ol or stiripentol was labelled by 14 C and 3 H. 14 C labelling was performed on the carbon 1 of the pentene group via a four step procedure. The radiochemical yield calculated from the precursor (Ba 14 CO 3 ) is 28%. 3 H labelling was performed on the position 3 of the pentene chain by reduction of the corresponding ketone via NaBT 4 . The radiochemical yield calculated from the precursor (NaBT 4 ) is 40%. (author)

Biotransformation of trans-1-chloro-3,3,3-trifluoropropene (trans-HCFO-1233zd)

International Nuclear Information System (INIS)

Schmidt, Tobias; Bertermann, Rüdiger; Rusch, George M.; Tveit, Ann; Dekant, Wolfgang

2013-01-01

trans-1-Chloro-3,3,3-trifluoropropene (trans-HCFO-1233zd) is a novel foam blowing and precision cleaning agent with a very low impact for global warming and ozone depletion. trans-HCFO-1233zd also has a low potential for toxicity in rodents and is negative in genotoxicity testing. The biotransformation of trans-HCFO-1233zd and kinetics of metabolite excretion with urine were assessed in vitro and in animals after inhalation exposures. For in vitro characterization, liver microsomes from rats, rabbits and humans were incubated with trans-HCFO-1233zd. Male Sprague Dawley rats and female New Zealand White rabbits were exposed to 2,000, 5,000 and 10,000 ppm for 6 h and urine was collected for 48 h after the end of the exposure. Study specimens were analyzed for metabolites using 19 F NMR, LC-MS/MS and GC/MS. S-(3,3,3-trifluoro-trans-propenyl)-glutathione was identified as predominant metabolite of trans-HCFO-1233zd in all microsomal incubation experiments in the presence of glutathione. Products of the oxidative biotransformation of trans-HCFO-1233zd were only minor metabolites when glutathione was present. In rats, both 3,3,3-trifluorolactic acid and N-acetyl-(3,3,3-trifluoro-trans-propenyl)-L-cysteine were observed as major urinary metabolites. 3,3,3-Trifluorolactic acid was not detected in the urine of rabbits. Quantitation showed rapid excretion of both metabolites in both species (t 1/2 1/2 < 6 h). ► Glutathione adduct as predominant in vitro metabolite in all tested species. ► Toxic metabolites could not be detected in any great extent

Natural modifiers of seed longevity in the Arabidopsis mutants abscisic acid insensitive3-5 (abi3-5) and leafy cotyledon1-3 (lec1-3)

NARCIS (Netherlands)

Sugliani, M.R.L.; Rajjou, L.; Clerkx, E.J.M.; Koornneef, M.; Soppe, W.J.J.

2009-01-01

• Seed longevity is an important trait in many crops and is essential for the success of most land plant species. Current knowledge of its molecular regulation is limited. The Arabidopsis mutants abscisic acid insensitive3-5 (abi3-5) and leafy cotyledon1-3 (lec1-3) have impaired seed maturation and

Composites Li2MnO3·LiMn1/3Ni1/3Co1/3O2: Optimized synthesis and applications as advanced high-voltage cathode for batteries working at elevated temperatures

International Nuclear Information System (INIS)

Yu Chuang; Li Guangshe; Guan Xiangfeng; Zheng Jing; Li Liping; Chen Tianwen

2012-01-01

Highlights: ► Composites xLi 2 MnO 3 ·(1 − x)LiMn 1/3 Ni 1/3 Co 1/3 O 2 (x = 0.1–0.4) were prepared by a novel two-step molten-salt route. ► Structure and chemical compositions of the composites were optimized to show an optimum electrochemical property. ► Composite electrode 0.3Li 2 MnO 3 ·0.7LiMn 1/3 Ni 1/3 Co 1/3 O 2 exhibited an excellent electrochemical performance at elevated temperature of 45.4 °C. ► Electrode kinetics of composites was uncovered for the excellent electrochemical performance at elevated temperature. - Abstract: This work reports on the optimized preparation of a series of composites xLi 2 MnO 3 ·(1 − x)LiMn 1/3 Ni 1/3 Co 1/3 O 2 (x = 0.1–0.4) with an aim to find an advanced high-voltage cathode for lithium-ion batteries that can work at elevated temperatures. Developing a two-step molten-salt method leads to composites with a layered-type structure, showing a particle size distribution ranging from 350 to 450 nm. The composites are featured by oxidation states stabilized as Mn 4+ , Ni 2+ , and Co 3+ , and by lattice occupation of Li + in both transition-metal layers and lithium layer of LiMn 1/3 Ni 1/3 Co 1/3 O 2 . When acting as a cathode of lithium-ion batteries, the composite at x = 0.3 shows an optimum electrochemical performance as characterized by a discharge capacity of 120 mAh g −1 at a high current density of 500 mA g −1 and a capacity retention of 64% after 20 cycles. Surprisingly, this electrochemical performance is significantly improved at elevated temperatures. Namely, discharge capacity is increased to 140.4 mAh g −1 at a high current density of 500 mA g −1 , while average capacity decay rate becomes very small to 0.76%. These excellent performance is explained in terms of the dramatically improved lithium-ion diffusions in both electrode and surface films at elevated temperatures.

A novel process for recycling and resynthesizing LiNi1/3Co1/3Mn1/3O2 from the cathode scraps intended for lithium-ion batteries

International Nuclear Information System (INIS)

Zhang, Xihua; Xie, Yongbing; Cao, Hongbin; Nawaz, Faheem; Zhang, Yi

2014-01-01

Highlights: • A simple process to recycle cathode scraps intended for lithium-ion batteries. • Complete separation of the cathode material from the aluminum foil is achieved. • The recovered aluminum foil is highly pure. • LiNi 1/3 Co 1/3 Mn 1/3 O 2 is directly resynthesized from the separated cathode material. - Abstract: To solve the recycling challenge for aqueous binder based lithium-ion batteries (LIBs), a novel process for recycling and resynthesizing LiNi 1/3 Co 1/3 Mn 1/3 O 2 from the cathode scraps generated during manufacturing process is proposed in this study. Trifluoroacetic acid (TFA) is employed to separate the cathode material from the aluminum foil. The effects of TFA concentration, liquid/solid (L/S) ratio, reaction temperature and time on the separation efficiencies of the cathode material and aluminum foil are investigated systematically. The cathode material can be separated completely under the optimal experimental condition of 15 vol.% TFA solution, L/S ratio of 8.0 mL g −1 , reacting at 40 °C for 180 min along with appropriate agitation. LiNi 1/3 Co 1/3 Mn 1/3 O 2 is successfully resynthesized from the separated cathode material by solid state reaction method. Several kinds of characterizations are performed to verify the typical properties of the resynthesized LiNi 1/3 Co 1/3 Mn 1/3 O 2 powder. Electrochemical tests show that the initial charge and discharge capacities of the resynthesized LiNi 1/3 Co 1/3 Mn 1/3 O 2 are 201 mAh g −1 and 155.4 mAh g −1 (2.8–4.5 V, 0.1 C), respectively. The discharge capacity remains at 129 mAh g −1 even after 30 cycles with a capacity retention ratio of 83.01%

Thermochemistry of 1,3-diethylbarbituric and 1,3-diethyl-2-thiobarbituric acids: Experimental and computational study

International Nuclear Information System (INIS)

Notario, Rafael; Roux, María Victoria; Ros, Francisco; Emel’yanenko, Vladimir N.; Zaitsau, Dzmitry H.; Verevkin, Sergey P.

2014-01-01

Highlights: • Enthalpies of formation in condensed phase have been obtained. • Enthalpy of vaporization of 1,3-diethylbarbituric acid has been determined. • Enthalpy of sublimation of 1,3-diethyl-2-thiobarbituric acid has been determined. • Gas-phase enthalpies of formation have been obtained. • Gas-phase enthalpies of formation have been calculated at G3 and G4 levels. - Abstract: This paper reports an experimental and computational thermochemical study on two barbituric acid derivatives, viz. 1,3-diethylbarbituric acid and 1,3-diethyl-2-thiobarbituric acid. Values of standard molar enthalpies of formation in the gas phase at T = 298.15 K have been derived from experiment. Energies of combustion were measured by the static bomb combustion calorimetry in the case of 1,3-diethylbarbituric acid, and the rotating-bomb combustion calorimetry in the case of 1,3-diethyl-2-thiobarbituric acid. From the combustion energies, standard molar enthalpies of formation in the crystalline state at T = 298.15 K were calculated. The enthalpy of vaporization of 1,3-diethylbarbituric acid and enthalpy of sublimation of 1,3-diethyl-2-thiobarbituric acid were determined using the transpiration method. Combining calorimetric and transpiration results, values of −(611.9 ± 2.0) kJ · mol −1 and −(343.8 ± 2.2) kJ · mol −1 for the gas-phase enthalpies of formation at T = 298.15 K of 1,3-diethylbarbituric and 1,3-diethyl-2-thiobarbituric acids, respectively, were derived. Theoretical calculations at the G3 and G4 levels were performed, and a study of the molecular structure of the compounds has been carried out. Calculated enthalpies of formation were in very good agreement with the experimental values

1,3Do and 1,3Pe states of two electron atoms under Debye plasma screening

International Nuclear Information System (INIS)

Saha, Jayanta K.; Bhattacharyya, S.; Mukherjee, T.K.; Mukherjee, P.K.

2010-01-01

Extensive non-relativistic variational calculations for estimating the energy values of 2pnd( 1,3 D o ) states [n=3-6] of two electron atoms (He, Li + ,Be 2+ ) and 2pnp( 1 P e )[n=3-8] and 2pnp( 3 P e ) states [n=2-7] of Be 2+ under weakly coupled plasma screening have been performed using explicitly correlated Hylleraas type basis. The modified energy eigenvalues of 1,3 P e states arising from two p electrons of Be 2+ ion and 1,3 D o states due to 2pnd configuration of Li + and Be 2+ ion in the Debye plasma environment are being reported for the first time. The effect of plasma has been incorporated through the Debye screening model. The system tends towards gradual instability and the number of bound states reduces with increasing plasma coupling strength. The wavelengths for 2pn ' p( 1 P e )[n ' =3-8]→2pnd( 1 D o )[n=3-6] and 2pn ' p( 3 P e )[n ' =2-8]→2pnd( 3 D o )[n=3-6] transitions in plasma embedded two electron atoms have also been reported.

Synthesis of 0.3Li2MnO3·0.7LiNi1/3Co1/3Mn1/3O2 cathode materials using 3-D urchin-like MnO2 as precursor for high performance lithium ion battery

International Nuclear Information System (INIS)

Zhao, Chenhao; Hu, Zhibiao; Zhou, Yunlong; Fang, Shuzhen; Cai, Shaohan

2015-01-01

In the paper, we report synthesis of lithium rich layered oxide 0.3Li 2 MnO 3 ·0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 by using an urchin-like MnO 2 as precursor. The influences of calcination temperatures on the structures and electrochemical performances of as-prepared materials are systematically studied. The results show that the obtained sample can partially retain the morphology of urchin-like precursor especially at low temperature, and a higher calcination temperature helps to improve the layered structure and particle size. As lithium ion battery cathodes, the 750 °C sample with the size of 100–200 nm reveals an optimal electrochemical performance. The initial discharge capacity of 234.6 mAh g −1 with high Coulombic efficiency of 84.6 % can be reached at 0.1C within 2.0–4.7 V. After 50 cycles, the capacity retention can reach 90.2 % at 0.5C. Even at high current density of 5C, the sample also shows a stable discharge capacity of 120.5 mAh g −1 . Anyways, the urchin-like MnO 2 directed route is suitable to prepare 0.3Li 2 MnO 3 ·0.7LiNi 1/3 Co 1/3 Mn 1/3 O 2 as lithium ion battery cathode

Electroweak phase transition in the economical 3-3-1 model

Energy Technology Data Exchange (ETDEWEB)

Phong, Vo Quoc; Van, Vo Thanh; Minh, Le Hoang [Ho Chi Minh City University of Science, Department of Theoretical Physics, Ho Chi Minh City (Viet Nam); Long, Hoang Ngoc [Vietnamese Academy of Science and Technology, Institute of Physics, Hanoi (Viet Nam)

2015-07-15

We consider the EWPT in the economical 3-3-1 (E331) model. Our analysis shows that the EWPT in the model is a sequence of two first-order phase transitions, SU(3) → SU(2) at the TeV scale and SU(2) → U(1) at the 100 GeV scale. The EWPT SU(3) → SU(2) is triggered by the new bosons and the exotic quarks; its strength is about 1-13 if the mass ranges of these new particles are 10{sup 2}-10{sup 3} GeV. The EWPT SU(2) → U(1) is strengthened by only the new bosons; its strength is about 1-1.15 if the mass parts of H{sub 1}{sup 0}, H{sub 2}{sup ±} and Y{sup ±} are in the ranges 10-10{sup 2} GeV. The contributions of H{sub 1}{sup 0} and H{sub 2}{sup ±} to the strengths of both EWPTs may make them sufficiently strong to provide large deviations from thermal equilibrium and B violation necessary for baryogenesis. (orig.)

Phase equilibria and microstructure in Sr₄Fe_6-xCo_xO₁₃ 0 <= x <= 4 mixed conductors

DEFF Research Database (Denmark)

Fossdal, A.; Sagdahl, L.T.; Einarsrud, M.A.

2001-01-01

CozO3-delta and Co1-yFeyO were observed with increasing sintering temperature and increasing Co-content due to the limited solubility of Co in Sr4Fe6-xCoxO13. The thermal expansion coefficient of the materials deviates from linear behavior due to the decreasing oxidation state of iron with increasing...

Measurement of solute proton spin-lattice relaxation times in water using the 1,3,3,1 sequence

International Nuclear Information System (INIS)

Sankar, S.S.; Mole, P.A.; Coulson, R.L.

1986-01-01

1 H NMR spin-lattice relaxation times (T1) of the N-CH3 proton resonances of phosphocreatine (PCr) and creatine (Cr) in water solutions were obtained using the 1,3,3,1 pulse sequence. These T1 values were equivalent to those obtained in D 2 O and water using either the conventional inversion-recovery experiment or the 1,3,3,1 pulse sequence. Thus, the 1,3,3,1 sequence of proton NMR can provide an independent means along with phosphorous NMR for assess PCr and for the study of the creatine kinase reaction (PCr + ADP in equilibrium ATP + Cr) in aqueous solutions and perhaps in biological preparations

Synthesis, characterization and initial evaluation of 5-nitro-1-(trifluoromethyl-3H-1λ3,2-benziodaoxol-3-one

Directory of Open Access Journals (Sweden)

Nico Santschi

2014-01-01

Full Text Available The synthesis of 5-nitro-1-(trifluoromethyl-3H-1λ3,2-benziodaoxol-3-one (3, a hypervalent-iodine-based electrophilic trifluoromethylating reagent, is described. Whereas considerations based on cyclic voltammetry and X-ray structural properties would predict an inferior reactivity when compared to the non-nitrated derivative 2, 19F NMR kinetic studies showed that this new derivative is almost one order of magnitude more reactive. Furthermore, differential scanning calorimetry measurements indicated that, in addition, it is also safer to handle.

4-{[(1-Phenyl-1H-pyrazol-3-yloxy]methyl}-1,3-dioxolan-2-one

Directory of Open Access Journals (Sweden)

Algirdas Šačkus

2012-11-01

Full Text Available The title compound was obtained by the reaction of tosylated glycerol carbonate with 1-phenyl-1H-pyrazol-3-ol in a good 71% yield. Detailed spectroscopic data (1H-NMR, 13C-NMR, 15N-NMR, IR, MS are presented.

Improved high-voltage performance of LiNi1/3Co1/3Mn1/3O2 cathode with Tris(2,2,2-trifluoroethyl) phosphite as electrolyte additive

International Nuclear Information System (INIS)

Wang, Long; Ma, Yulin; Li, Qin; Cui, Yingzhi; Wang, Panpan; Cheng, Xinqun; Zuo, Pengjian; Du, Chunyu; Gao, Yunzhi

2017-01-01

Tris(2,2,2-trifluoroethyl) phosphite (TTFEP) is investigated as an electrolyte additive to improve the electrochemical performance of LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode at high operating voltage (4.6 V). Charge/discharge measurements demonstrate that TTFEP is effective to improve the cycling stability and rate capability of LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode. The capacity retention of LiNi 1/3 Co 1/3 Mn 1/3 O 2 /Li cell with 1% TTFEP-containing electrolyte reaches up to 85.4% after 100 cycles at 0.5C (1C = 160 mA g −1 ), while that of the cell with the baseline electrolyte (1 M LiPF 6 in EC/DMC electrolyte) only remains 74.2%. Moreover, the discharge capacity of the cathode with 1% TTFEP-containing electrolyte could maintain around 112.0 mAh g −1 at 4C. Based on the characterization of electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), a protective interphase film formed on the cathode surface can be found due to the preferential oxidation of TTFEP, which inhibits the electrolyte decomposition and mitigates the cathode structural destruction, leading to the improved electrochemical performance of LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode at high voltage.

Ion chemistry of 1H-1,2,3-triazole.

Science.gov (United States)

Ichino, Takatoshi; Andrews, Django H; Rathbone, G Jeffery; Misaizu, Fuminori; Calvi, Ryan M D; Wren, Scott W; Kato, Shuji; Bierbaum, Veronica M; Lineberger, W Carl

2008-01-17

A combination of experimental methods, photoelectron-imaging spectroscopy, flowing afterglow-photoelectron spectroscopy and the flowing afterglow-selected ion flow tube technique, and electronic structure calculations at the B3LYP/6-311++G(d,p) level of density functional theory (DFT) have been employed to study the mechanism of the reaction of the hydroxide ion (HO-) with 1H-1,2,3-triazole. Four different product ion species have been identified experimentally, and the DFT calculations suggest that deprotonation by HO- at all sites of the triazole takes place to yield these products. Deprotonation of 1H-1,2,3-triazole at the N1-H site gives the major product ion, the 1,2,3-triazolide ion. The 335 nm photoelectron-imaging spectrum of the ion has been measured. The electron affinity (EA) of the 1,2,3-triazolyl radical has been determined to be 3.447 +/- 0.004 eV. This EA and the gas-phase acidity of 2H-1,2,3-triazole are combined in a negative ion thermochemical cycle to determine the N-H bond dissociation energy of 2H-1,2,3-triazole to be 112.2 +/- 0.6 kcal mol-1. The 363.8 nm photoelectron spectroscopic measurements have identified the other three product ions. Deprotonation of 1H-1,2,3-triazole at the C5 position initiates fragmentation of the ring structure to yield a minor product, the ketenimine anion. Another minor product, the iminodiazomethyl anion, is generated by deprotonation of 1H-1,2,3-triazole at the C4 position, followed by N1-N2 bond fission. Formation of the other minor product, the 2H-1,2,3-triazol-4-ide ion, can be rationalized by initial deprotonation of 1H-1,2,3-triazole at the N1-H site and subsequent proton exchanges within the ion-molecule complex. The EA of the 2H-1,2,3-triazol-4-yl radical is 1.865 +/- 0.004 eV.

Structural characterization and catalytic properties of bis(1,1,3,3-tetramethylguanidinium) dichromate

DEFF Research Database (Denmark)

Due-Hansen, Johannes; Ståhl, Kenny; Boghosian, Soghomon

2011-01-01

The structure of bis(1,1,3,3-tetramethylguanidinium) dichromate was determined from powder X-ray diffraction data. The compound crystallizes in the monoclinic system (space group P21/n) with a = 10.79714 (15) Å, b = 11.75844 (16) Å, c = 8.15097 (11) Å, β = 109.5248 (6)º. The structure consists of...

(3,5-Dimethylpyrazol-1-yl-[4-(1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-ylaminophenyl]methanone

Directory of Open Access Journals (Sweden)

Rania B. Bakr

2016-11-01

Full Text Available In an attempt to enhance cytotoxic activity of pyrazolo[3,4-d]pyrimidine core, we synthesized (3,5-dimethylpyrazol-1-yl-[4-(1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-ylaminophenyl]methanone (4 by reacting 4-(1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-ylaminobenzohydrazide (3 with acetylacetone. Antiproliferative activity of this compound was screened against breast (MCF-7, colon (HCT-116, and liver (HEPG-2 cancer cell lines. The tested compound exhibited cytotoxic activity with IC50 = 5.00–32.52 μM. Moreover, inhibitory activity of this compound was evaluated against the epidermal growth factor receptor (EGFR, the fibroblast growth factor receptor (FGFR, the insulin receptor (IR, and the vascular endothelial growth factor receptor (VEGFR. This target compound showed potent inhibitory activity, especially against FGFR with IC50 = 5.18 μM.

Optical evidences for an intermediate phase in relaxor ferroelectric Pb(In1/2Nb1/2O3-Pb(Mg1/3Nb2/3O3-PbTiO3 single crystals

Directory of Open Access Journals (Sweden)

Xiaolong Zhang

2016-02-01

Full Text Available The mechanism of low-temperature structural transformation and evolution of polar nano-structures in relaxor ferroelectric Pb(In1/2Nb1/2O3-Pb(Mg1/3Nb2/3O3-xPbTiO3 (x = 0.33, 0.35, and 0.42 single crystals have been investigated with the aid of temperature dependent low-wavenumber Raman scattering (LWRS and photoluminescence (PL spectra. The E(TO1 phonon mode reveals the characteristic relaxational polarization fluctuations associated with the reorientation of either polar nano-regions or polar nano-domains. It was found that these mechanisms are not independent and they can be ascribed to the phonon localization. In addition, a short-range monoclinic phase (Mc can be found below 250 K in the tetragonal phase region by LWRS, which is always associated with the morphotropic phase boundary (MPB and excellent electromechanical properties. It is interesting that PL spectra confirm these results. The present work indicates that external field modulation and change of composition can result in the monoclinic phase and co-existence of multi-phase.

Ion radical rupture of the carbon-carbon bond in oxidation of 1,3,1',3'-tetramethyl-2,3,2',3'- tetrahydro-2,2'-diperimidinyl

International Nuclear Information System (INIS)

Sabanov, V.Kh.; Kibizova, A.Yu.; Klimov, E.S.; Berberova, N.T.; Okhlobystin, O.Yu.

1987-01-01

Electrochemical and chemical oxidation of 1,3,1',3'-tetramethyl-2,3,2',3'-tetrahydro-2,2'-dipyriminyl takes place with rupture of the C-C bond in the initially formed cation radical. In the oxidation of the compound with aluminum chloride in nitrobenzene, ESR revealed a cation radical with an unresolved hyperfine structure. Oxidation of the dihydrodimer with nitrosonium perchlorate in nitrobenzene or nitromethane resulted in the same spectra. Cyclic volt-ampere diagrams are included

Growth mechanisms for spherical mixed hydroxide agglomerates prepared by co-precipitation method: A case of Ni1/3Co1/3Mn1/3(OH)2

International Nuclear Information System (INIS)

Yang, Yue; Xu, Shengming; Xie, Ming; He, Yinghe; Huang, Guoyong; Yang, Youcai

2015-01-01

Highlights: • Anisotropic growth of Ni 1/3 Co 1/3 Mn 1/3 (OH) 2 along the [0 0 1] direction was revealed. • DFT calculation results show crystal surface energies of (0 0 1) plane is highest. • A new model was proposed to explain the formation of spherical agglomerates. - Abstract: Spherical Ni 1/3 Co 1/3 Mn 1/3 (OH) 2 agglomerates were synthesized by the co-precipitation method in the presence of ammonia. The results show that the growth mechanism of spherical agglomerates follows three-stages, i.e. nucleation and anisotropic growth of single crystals; agglomeration of polycrystalline crystallites agglomerated by single crystal grains as primary particles to form embryonic agglomerates; formation, growth and consolidation of spherical agglomerates or particles by agglomeration of embryonic agglomerates, continued growth of individual crystals in the agglomerates and further attachment of primary particles. The first two stages are very fast while the last stage takes almost the entire process to complete. The main reason for the anisotropic growth of Ni 1/3 Co 1/3 Mn 1/3 (OH) 2 crystal is that crystal surface energy of E (001) , E (100) , E (101) and E (102) is different with E (001) being the highest. The morphology of the final spherical agglomerates is explained by partial re-crystallization of contacting primary particles. The growth process of spherical agglomerates was examined by X-ray diffraction, scanning electron microscope, transmission electron microscope and calculation of crystal surface energy using density function theory

High rate performances of the cathode material LiNi1/3Co1/3Mn1/3O2 synthesized using low temperature hydroxide precipitation

International Nuclear Information System (INIS)

Cheng, Cuixia; Tan, Long; Liu, Haowen; Huang, Xintang

2011-01-01

Graphical abstract: A low-temperature reaction route is introduced based on hydroxide precipitation method to synthesize a cathode material LiNi 1/3 Co 1/3 Mn 1/3 O 2 . The charge-discharge tests were performed at 1000 mA g -1 between 2.5 and 4.5 V and the discharge capacity is about 160 mAh g -1 . The discharge capacity of the material is strongly impacted by the reaction temperature. The powders sintered at 850 o C show the best electrochemical performance. Highlights: → A low-temperature reaction route is introduced based on hydroxide precipitation method to synthesize a novel cathode material LiNi 1/3 Co 1/3 Mn 1/3 O 2 . → The charge-discharge tests were performed at higher current as 5 C between 2.5 and 4.5 V. → The discharge capacity of the material is strongly impacted by the reaction temperature. The powders sintered at 850 o C show the best electrochemical performance. -- Abstract: A low-temperature reaction route is introduced based on hydroxide precipitation method to synthesize the cathode material LiNi 1/3 Co 1/3 Mn 1/3 O 2 . The crystal structure and morphology of the prepared powder have been characterized by X-ray diffraction and Scan electron microscope, respectively. The charge-discharge tests were performed between 2.5 and 4.5 V. The discharge capacity of the material is strongly impacted by the reaction temperature. The powders sintered at 850 o C show the best electrochemical performance and the initial discharge capacity is about 160 mAh g -1 at 5 C. Powder X-ray diffraction and Scan electron microscope results reveal that the excellent electrochemical performances should be ascribed to the lower precursor reaction temperature, the lower degree of cation mixing and analogous spherical small particles, which can improve the transfer of Li ions and electrons. All these results indicate that this material has potential application in lithium-ion batteries.

1-3 Composites Study

National Research Council Canada - National Science Library

Gabrielson, Thomas B

2003-01-01

...) In a transducer in which the active material is sandwiched between mass elements, the filler in a 1-3 composite degrades performance with respect to an unfilled array of piezoelectric rods. (3...

Thermal reactivity of some nitro- and nitroso-compounds derived from 1,3,5,7-tetraazabicyclo[3.3.1]nonane at contamination by ammonium nitrate.

Science.gov (United States)

Zeman, Svatopluk; Shu, Yuanjie; Friedl, Zdenek; Vágenknecht, Jirí

2005-05-20

Thermal reactivity of 3,7-dinitro-1,3,5,7-tetraazabicyclo[3.3.1]nonane (DPT), 3,7-dinitroso-1,3,5,7-tetraazabicyclo[3.3.1]nonane (DNPT), 1,3,5-trinitroso-1,3,5-triazinane (TMTA or R-salt), 1,3,5-trinitro-1,3,5-triazinane (hexogen or RDX), 1,5-diacetyl-3,7-dinitro-1,3,5,7-tetrazocane (DADN), alpha-modification of the 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (octogen or HMX) and of their mixtures with 2wt.% of ammonium nitrate (AN) has been examined by means of non-isothermal differential thermal analysis. The resulting data were analyzed according to the Kissinger method. The reactivity was expressed as the E(a)R(-1) slopes of the Kissinger relationship. A relatively high reactivity has been found with mixtures of DPT and DNPT with AN. Electronic charges q(N) at nitrogen atoms in molecules of the compounds studied were calculated by means of ab initio DFT B3LYP/6-31G** method. The relationships were confirmed between the slopes E(a)R(-1) and the q(N) values for the nitrogen atoms primarily undergoing reaction. On the basis of these relationships it is stated that the destabilizing effect of AN is due to acidolytic attack of nitric acid (resulting from dissociation of ammonium nitrate) at the nitrogen atoms with the most negative q(N) values in the molecules of the compounds studied.

Aspartame downregulates 3T3-L1 differentiation.

Science.gov (United States)

Pandurangan, Muthuraman; Park, Jeongeun; Kim, Eunjung

2014-10-01

Aspartame is an artificial sweetener used as an alternate for sugar in several foods and beverages. Since aspartame is 200 times sweeter than traditional sugar, it can give the same level of sweetness with less substance, which leads to lower-calorie food intake. There are reports that consumption of aspartame-containing products can help obese people lose weight. However, the potential role of aspartame in obesity is not clear. The present study investigated whether aspartame suppresses 3T3-L1 differentiation, by downregulating phosphorylated peroxisome proliferator-activated receptor γ (p-PPARγ), peroxisome proliferator-activated receptor γ (PPARγ), fatty acid-binding protein 4 (FABP4), CCAAT/enhancer-binding protein α (C/EBPα), and sterol regulatory element-binding protein 1 (SREBP1), which are critical for adipogenesis. The 3T3-L1 adipocytes were cultured and differentiated for 6 d in the absence and presence of 10 μg/ml of aspartame. Aspartame reduced lipid accumulation in differentiated adipocytes as evidenced by Oil Red O staining. qRT-PCR analysis showed that the PPARγ, FABP4, and C/EBPα mRNA expression was significantly reduced in the aspartame-treated adipocytes. Western blot analysis showed that the induction of p-PPARγ, PPARγ, SREBP1, and adipsin was markedly reduced in the aspartame-treated adipocytes. Taken together, these data suggest that aspartame may be a potent substance to alter adipocyte differentiation and control obesity.

Hydrogen peroxide assisted synthesis of LiNi1/3Co1/3Mn1/3O2 as high-performance cathode for lithium-ion batteries

Science.gov (United States)

Lin, Chaohong; Zhang, Yongzhi; Chen, Li; Lei, Ying; Ou, Junke; Guo, Yong; Yuan, Hongyan; Xiao, Dan

2015-04-01

LiNi1/3Co1/3Mn1/3O2 (NCM) is a promising cathode material for lithium-ion battery. In this research, a facile co-precipitation process is employed, during which the mixed solution of NH3·H2O, H2O2 (30% aqueous solution) and LiOH·H2O is added into the nitrate solution. Notably, H2O2 is introduced as the oxidant and dispersant during the co-precipitation process to oxidize the metal ions and decrease the agglomeration of the precursor by giving out O2, and then improves the specific capacity, stability and energy density of NCM. Additionally, O3 is employed to further oxidize NCM to enhance the stability during the calcination process. The obtained NCM material with single crystal structure exhibits a high initial discharge specific capacity of 208.9 mAh g-1 at 0.1 C (1 C = 280 mA g-1), an excellent cycle stability with high retained capacity of 176.3 mAh g-1 after 50 cycles, and a high initial discharge specific capacities of 150.6 mAh g-1 at 5 C even at a high cutoff potential (4.6 V).

1,3-dialkyl- and 1,3-diaryl-3,4,5,6-tetrahydropyrimidin-2-ylidene rhodium(i) and palladium(II) complexes: synthesis, structure, and reactivity.

Science.gov (United States)

Mayr, Monika; Wurst, Klaus; Ongania, Karl-Hans; Buchmeiser, Michael R

2004-03-05

The synthesis of novel 1,3-diaryl- and 1,3-dialkylpyrimidin-2-ylidene-based N-heterocyclic carbenes (NHCs) and their rhodium(i) and palladium(II) complexes is described. The rhodium compounds bromo(cod)[1,3-bis(2-propyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene]rhodium (7), bromo(cod)(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene)rhodium (8) (cod=eta(4)-1,5-cyclooctadiene, mesityl=2,4,6-trimethylphenyl), chloro(cod)(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene)rhodium (9), and chloro(cod)[1,3-bis(2-propyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene]rhodium (10) were prepared by reaction of [[Rh(cod)Cl](2)] with lithium tert-butoxide followed by addition of 1,3-dimesityl-3,4,5,6-tetrahydropyrimidinium bromide (3), 1,3-dimesityl-3,4,5,6-tetrahydropyrimidinium tetrafluoroborate (4), 1,3-di-2-propyl-3,4,5,6-tetrahydropyrimidinium bromide (6), and 1,3-di-2-propyl-3,4,5,6-tetrahydropyrimidinium tetrafluoroborate, respectively. Complex 7 crystallizes in the monoclinic space group P2(1)/n, and 8 in the monoclinic space group P2(1). Complexes 9 and 10 were used for the synthesis of the corresponding dicarbonyl complexes dicarbonylchloro(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene)rhodium (11), and dicarbonylchloro[1,3-bis(2-propyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene]rhodium (12). The wavenumbers nu(CO I)/nu(CO II) for 11 and 12 were used as a quantitative measure for the basicity of the NHC ligand. The values of 2062/1976 and 2063/1982 cm(-1), respectively, indicate that the new NHCs are among the most basic cyclic ligands reported so far. Compounds 3 and 6 were additionally converted to the corresponding cationic silver(i) bis-NHC complexes [Ag(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2-ylidene)(2)]AgBr(2) (13) and [Ag[1,3-bis(2-propyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene](2)]AgBr(2) (14), which were subsequently used in transmetalation reactions for the synthesis of the corresponding palladium(II) complexes Pd(1,3-dimesityl-3,4,5,6-tetrahydropyrimidin-2

Nebivolol stimulates mitochondrial biogenesis in 3T3-L1 adipocytes

Energy Technology Data Exchange (ETDEWEB)

Huang, Chenglin; Chen, Dongrui; Xie, Qihai [State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Vascular Biology, Department of Hypertension, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025 (China); Yang, Ying, E-mail: yangying_sh@yahoo.com [Department of Endocrine and Metabolic Diseases, Shanghai Institute of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025 (China); Shen, Weili, E-mail: weili_shen@hotmail.com [State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Vascular Biology, Department of Hypertension, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025 (China)

2013-08-16

Highlights: •Nebivolol may act as a partial agonist of β3-adrenergic receptor (AR). •Nebivolol stimulates mitochondrial DNA replication and protein expression. •Nebivolol promotes mitochondrial synthesis via activation of eNOS by β3-AR. -- Abstract: Nebivolol is a third-generation β-adrenergic receptor (β-AR) blocker with additional beneficial effects, including the improvement of lipid and glucose metabolism in obese individuals. However, the underlying mechanism of nebivolol’s role in regulating the lipid profile remains largely unknown. In this study, we investigated the role of nebivolol in mitochondrial biogenesis in 3T3-L1 adipocytes. Exposure of 3T3-L1 cells to nebivolol for 24 h increased mitochondrial DNA copy number, mitochondrial protein levels and the expression of transcription factors involved in mitochondrial biogenesis, including PPAR-γ coactivator-1α (PGC-1α), Sirtuin 3 (Sirt3), mitochondrial transcription factor A (Tfam) and nuclear related factor 1 (Nrf1). These changes were accompanied by an increase in oxygen consumption and in the expression of genes involved in fatty acid oxidation and antioxidant enzymes in 3T3-L1 adipocytes, including nebivolol-induced endothelial nitric oxide synthase (eNOS), as well as an increase in the formation of cyclic guanosine monophosphate (cGMP). Pretreatment with NG-nitro-L-arginine methyl ester (l-NAME) attenuated nebivolol-induced mitochondrial biogenesis, as did the soluble guanylate cyclase inhibitor, ODQ. Treatment with nebivolol and β3-AR blocker SR59230A markedly attenuated PGC-1α, Sirt3 and manganese superoxide dismutase (MnSOD) protein levels in comparison to treatment with nebivolol alone. These data indicate that the mitochondrial synthesis and metabolism in adipocytes that is promoted by nebivolol is primarily mediated through the eNOS/cGMP-dependent pathway and is initiated by the activation of β3-AR receptors.

1,1′-{1,4-Phenylene bis[3-(6-chloro-2-methyl-4-phenylquinolin-3-yl-4,5-dihydro-1H-pyrazole-5,1-diyl]}dibutan-1-one

Directory of Open Access Journals (Sweden)

Allaoua Kedjadja

2015-10-01

Full Text Available A new polycyclic compound, 1,1′-{1,4-phenylene bis[3-(6-chloro-2-methyl-4-phenylquinolin-3-yl-4,5-dihydro-1H-pyrazole-5,1-diyl]}dibutan-1-one (3 has been synthesized by cyclocondensation of (2E,2′E-1,1′-bis(6-chloro-2-methyl-4-phenylquinolin-3-yl-3,3′-(1,4-phenylenediprop-2-en-1-one (2 and hydrazine hydrate in butanoic acid. The structure of this compound was established by elemental analysis, 1H-NMR, 13C-NMR, mass and IR spectroscopy.

Effects of Residual Lithium in the precursors of Li[Ni1/3Co1/3Mn1/3]O2 on their lithium-ion battery performance

Science.gov (United States)

Jo, Minsang; Ku, Heesuk; Park, Sanghyuk; Song, Junho; Kwon, Kyungjung

2018-07-01

Li[Ni1/3Co1/3Mn1/3]O2 cathode active materials are synthesized from co-precipitated hydroxide precursors Lix[Ni1/3Co1/3Mn1/3]1-x(OH)2, and the effect of residual Li in the precursors on the lithium-ion battery (LIB) performance of their corresponding cathode active materials is investigated. Three kinds of precursors that contain different amounts of Li are selected depending on different conditions of the solution composition for the co-precipitation and washing process. It is confirmed that the introduction of Li to the precursors reduces the degree of structural perfection by X-ray diffraction analysis. Undesirable cation mixing occurs with the increasing Li content of the precursors, which is inferred from a decline in lattice parameters and the calculated intensity ratio of (003) and (104) peaks. In the voltage range of 3.0-4.3 V, the initial charge/discharge capacities and the rate capability of the cathode active materials are aggravated when Li exists in the precursors. Therefore, it could be concluded that the strict control of Li in a solution for co-precipitation of precursors is necessary in the resynthesis of cathode active materials from spent LIBs.

1 CFR 20.3 - Organization.

Science.gov (United States)

2010-01-01

... 1 General Provisions 1 2010-01-01 2010-01-01 false Organization. 20.3 Section 20.3 General... DOCUMENTS HANDLING OF THE UNITED STATES GOVERNMENT MANUAL STATEMENTS § 20.3 Organization. (a) Information about lines of authority and organization may be reflected in a chart if the chart clearly delineates...

Microwave assisted synthesis of core–shell LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C nanocomposite cathode for high-performance lithium-ion batteries

Energy Technology Data Exchange (ETDEWEB)

Li, Huanhuan [Automotive Engineering Research Institute, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013 (China); Li, Yunxing [School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 (China); Chen, Long; Jiang, Haobin [Automotive Engineering Research Institute, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013 (China); Wei, Jinping [Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071 (China); Wang, Hongbo [China Aviation Lithium Battery Co. Ltd., Luoyang 471003 (China); Wang, Yaping, E-mail: wangyaping@ujs.edu.cn [School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 (China)

2014-12-25

Highlights: • We firstly report a fast microwave heating way to prepare LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C. • The reversible discharge capacity of LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C is about 169 mA h g{sup −1}. • LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C nanocomposite elucidates excellent cyclic stability. • LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C nanocomposite exhibits attractive rate capability. - Abstract: A microwave assisted method is developed for synthesizing pure LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4} and LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C nanocomposite. Olivine LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4} coated with uniform amorphous carbon film of ∼5 nm in thickness with an average size of ∼200 nm is successfully obtained. Compared with pure LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}, LiFe{sub 1/3}Mn{sub 1/3}Co{sub 1/3}PO{sub 4}/C composite presents enhanced electrochemical Li-ion intercalation performances. It exhibits a high discharge capacity of 169 mA h g{sup −1} at 0.1 C (theoretical capacity is 170 mA h g{sup −1}). The capacity retention is 99% after 30 cycles. Furthermore, the capacities are still retained 101 at 5 C and 76 mA h g{sup −1} and 20 C, respectively. Carbon coating can significantly improve the Li-ion diffusion, the reversibility of lithium extraction/insertion and electrical conductivity of LiCo{sub 1/3}Mn{sub 1/3}Fe{sub 1/3}PO{sub 4}.

Sequential Diels–Alder/[3,3]-sigmatropic rearrangement reactions of β-nitrostyrene with 3-methyl-1,3-pentadiene

Directory of Open Access Journals (Sweden)

Peter A. Wade

2013-10-01

Full Text Available The tin(IV-catalyzed reaction of β-nitrostyrene with (E-3-methyl-1,3-pentadiene in toluene afforded two major nitronic ester cycloadducts in 27% and 29% yield that arise from the reaction at the less substituted diene double bond. Also present were four cycloadducts from the reaction at the higher substituted diene double bond, two of which were the formal cycloadducts of (Z-3-methyl-1,3-pentadiene. A Friedel–Crafts alkylation product from the reaction of the diene, β-nitrostyrene, and toluene was also obtained in 10% yield. The tin(IV-catalyzed reaction of β-nitrostyrene with (Z-3-methyl-1,3-pentadiene in dichloromethane afforded four nitronic ester cycloadducts all derived from the reaction at the higher substituted double bond. One cycloadduct was isolated in 45% yield and two others are formal adducts of the E-isomer of the diene. The product formation in these reactions is consistent with a stepwise mechanism involving a zwitterionic intermediate. The initially isolated nitronic ester cycloadducts underwent tin(IV-catalyzed interconversion, presumably via zwitterion intermediates. Cycloadducts derived from the reaction at the less substituted double bond of (E-3-methyl-1,3-pentadiene underwent a [3,3]-sigmatropic rearrangement on heating to afford 4-nitrocyclohexenes. Cycloadducts derived from the reaction at the higher substituted diene double bond of either diene failed to undergo a thermal rearrangement. Rates and success of the rearrangement are consistent with a concerted mechanism possessing a dipolar transition state. An initial assessment of substituent effects on the rearrangement process is presented.

Synthesis and Cytotoxic Evaluation of 1H-1,2,3-Triazol-1-ylmethyl-2,3-dihydronaphtho[1,2-b]furan-4,5-diones

Directory of Open Access Journals (Sweden)

INGRID C. CHIPOLINE

2018-02-01

Full Text Available ABSTRACT The 1,2-naphthoquinone compound was previously considered active against solid tumors. Moreover, glycosidase inhibitors such as 1,2,3-1H triazoles has been pointed out as efficient compounds in anticancer activity studies. Thus, a series of eleven 1,2-naphthoquinones tethered in C2 to 1,2,3-1H-triazoles 9a-k were designed, synthesized and their cytotoxic activity evaluated using HCT-116 (colon adenocarcinoma, MCF-7 (breast adenocarcinoma and RPE (human nontumor cell line from retinal epithelium. The chemical synthesis was performed from C-3 allylation of lawsone followed by iodocyclization with subsequent nucleophilic displacement with sodium azide and, finally, the 1,3-dipolar cycloaddition catalyzed by Cu(I with terminal alkynes led to the formation of 1H-1,2,3-Triazol-1-ylmethyl-2,3-dihydronaphtho[1,2-b]furan-4,5-diones in good yields. Compounds containing aromatic group linked to 1,2,3-triazole ring (9c, 9d, 9e, 9i presented superior cytotoxic activity against cancer cell lines with IC50 in the range of 0.74 to 4.4 µM indicating that the presence of aromatic rings substituents in the 1,2,3-1H-triazole moiety is probably responsible for the improved cytotoxic activity.

Improved conductivity of infinite-layer LaNiO2 thin films by metal organic decomposition

International Nuclear Information System (INIS)

Ikeda, Ai; Manabe, Takaaki; Naito, Michio

2013-01-01

Highlights: •LaNiO 2 films were synthesized by metal organic decomposition and topotactic reduction. •Room-temperature resistivity as low as 0.6 mΩ cm was achieved for infinite-layer LaNiO 2 . •Lattice matched substrates are important in obtaining high conductivity. -- Abstract: Infinite-layer LaNiO 2 thin films were synthesized by metal organic decomposition and subsequent topotactic reduction in hydrogen, and their transport properties were investigated. LaNiO 2 is isostructural to SrCuO 2 , the parent compound of high-T c Sr 0.9 La 0.1 CuO 2 with T c = 44 K, and has 3d 9 configuration, which is very rare in oxides but common to high-T c copper oxides. The bulk synthesis of LaNiO 2 is not easy, but we demonstrate in this article that the thin-film synthesis of LaNiO 2 is rather easy, thanks to a large-surface-to-volume ratio, which makes oxygen diffusion prompt. Our refined synthesis conditions produced highly conducting films of LaNiO 2 . The resistivity of the best film is as low as 640 μΩ cm at 295 K and decreases with temperature down to 230 K but it shows a gradual upturn at lower temperatures

Stress relaxation of La1/2Sr1/2MnO3 and La2/3Ca1/3MnO3 at solid oxide fuel cell interfaces

International Nuclear Information System (INIS)

Lussier, A.; Dvorak, J.; Stadler, S.; Holroyd, J.; Liberati, M.; Arenholz, E.; Ogale, S.B.; Wu, T.; Venkatesan, T.; Idzerda, Y.U.

2008-01-01

Interfacial stress is thought to have significant effects on electrical and oxygen transport properties in thin films of importance in solid oxide fuel cell applications. We investigate how in-plane biaxial stress modifies the electronic structure of La 2/3 Ca 1/3 MnO 3 and La 1/2 Sr 1/2 MnO 3 thin films prepared by pulsed laser deposition on three different substrates to vary the in-plane stress from tensile to compressive. The electronic structure was probed by X-ray absorption spectroscopy of the Mn L 2,3 -edge to characterize the interfacial disruption in this region in an element-specific, site-specific manner. The compressive or tensile interfacial strain modifies the relative concentrations of La and Sr in the interfacial region in order to achieve a better lattice match to the contact material. This atomic migration generates an interfacial region dominated by a compound with a single valency for the transition metal ion, resulting in a severe barrier to oxygen and electron transport through this region

ESTRUCTURA METÁLICA DE CATALIZADORES BASADOS EN PEROVSKITA La1-YCeYCo1-XFeXO3 EN METANO REFORMADO CON CO2 Y O2

Directory of Open Access Journals (Sweden)

Adriana García

2011-01-01

Full Text Available Se prepararon catalizadores metálicos estructurados constituidos por perovskitas con composiciones LaCo0.6Fe0.4O3, LaCo0.4Fe0.6O3 y La0.9Ce0.1Co0.6Fe0.4O3 soportadas sobre estructuras cónicas de una malla de acero inoxidable 316, a fin de estudiar el efecto de la estructura metálica en la reacción. Estos fueron evaluados en el reformado de metano con CO2 y O2, realizando la comparación con el mismo catalizador en polvo. Las condiciones de reacción fueron seleccionadas a partir de barridos de temperatura de reacción y de relación CH4/CO2 de la alimentación. Se alcanzó una conversión máxima de 88% y relación H2/CO de 1.6, para la perovskita de mayor contenido de Co a 850 °C y composición molar 6/1/3 en CH4/CO2/O2. Los catalizadores estructurados en forma de cono y en polvo presentaron un comportamiento similar. La sustitución de La por Ce no generó diferencias apreciables en el comportamiento catalítico. El uso de una estructura metálica similar a un empaque comercial, parece mejorar la estabilidad del catalizador de perovskita LaCo0.6Fe0.4O3 con una mayor relación H2/CO en los productos.

3+1 Pariisis

Index Scriptorium Estoniae

2000-01-01

Pariisis Arhitektuurigaleriis La Galerie d'Architecture näitus "4 Architectures", kuhu on valitud arhitektuuribürood neljast riigist: 3+1 arhitektid Eestist, Archis Lätist, Private Ideology Leedust, White arkitekter Rootsist.

Null fields realizations of W3 from W (sl(4), sl(3)) and W (sl(3/1), sl(3)) algebras

International Nuclear Information System (INIS)

Bellucci, S.; Krivonos, S.; Sorin, A.

1995-09-01

It is considered the nonlinear algebras W(sl(4), sl(3)) and W(sl(3/1), sl(3)) and it is found their realizations in terms of currents spanning conformal linearizing algebras. The specific structure of these algebras, allows to construct realizations modulo null fields of the W 3 algebra that lies in the cosets W(sl(4), sl(3))/u(1) and W(sl(3/1), sl(3))/u(1). Such realizations exist for the following values of the W 3 algebra central charge: cw=-30, -40/7, -98/5, -2. The first two values are listed for the first time, whereas for the remaining values the new realizations get in terms of an arbitrary stress tensor and u(1) x sl(2) affine currents

Methods of using (1S,3S)-3-amino-4-difluoromethylenyl-1-cyclopentanoic acid

Energy Technology Data Exchange (ETDEWEB)

Silverman, Richard B; Dewey, Stephen L; Miller, Steven

2015-03-03

(1S,3S)-3-amino-4-difluoromethylenyl-1-cyclopentanoic acid also known as CPP-115 or its pharmaceutically acceptable salts can be used to treat addiction and neurological disorders such as epilepsy without side effects such as visual field defects caused by vigabatrin (Sabril).

HANSF 1.3 user's manual

International Nuclear Information System (INIS)

PLYS, M.G.

1999-01-01

The HANSF analysis tool is an integrated model considering phenomena inside a multi-canister overpack (MCO) spent nuclear fuel container such as fuel oxidation, convective and radiative heat transfer, and the potential for fission product release. It may be used for all phases of spent fuel disposition including cold vacuum drying, transportation, and storage. This manual reflects HANSF version 1.3, a revised version of version 1.2a. HANSF 1.3 was written to add new models for axial nodalization, add new features for ease of usage, and correct errors. HANSF 1.3 is intended for use on personal computers such as IBM-compatible machines with Intel processors running under a DOS-type operating system. HANSF 1.3 is known to compile under Lahey TI and Digital Visual FORTRAN, Version 6.0, but this does not preclude operation in other environments

5-[(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-ylmethylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H-dione

Directory of Open Access Journals (Sweden)

Salman A. Khan

2010-03-01

Full Text Available The title compound, 5-[(3,5-dimethyl-1-phenyl-1H-pyrazol-4-ylmethylene]-1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H-dione, has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and 3,5-dimethyl-1-phenylpyrazole-4-carbaldehyde in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H-NMR, 13C-NMR and EI-MS spectral analysis.

(2E-1-(3-Chlorophenyl-3-(4-chlorophenylprop-2-en-1-one

Directory of Open Access Journals (Sweden)

Jerry P. Jasinski

2009-11-01

Full Text Available The title compound, C15H10Cl2O, is a chalcone with 3-chlorophenyl and 4-chlorophenyl substituents bonded at the opposite ends of a propenone group, the biologically active region. The dihedral angle between mean planes of these two chloro-substituted benzene rings is 46.7 (7° compared to 46.0 (1 and 32.4 (1° in similar published sructures. The angles between the mean plane of the prop-2-en-1-one group and the mean planes of the 3-chlorophenyl and 4-chlorophenyl rings are 24.1 (2 and 29.63°, respectively. While no classical hydrogen bonds are present, weak intermolecular C—H...π-ring interactions are observed, which contribute to the stability of crystal packing.

Modulation of electronic and optical properties in mixed halide perovskites CsPbCl3xBr3(1-x) and CsPbBr3xI3(1-x)

Science.gov (United States)

Zhou, Ziqi; Cui, Yu; Deng, Hui-Xiong; Huang, Le; Wei, Zhongming; Li, Jingbo

2017-03-01

The recent discovery of lead halide perovskites with band gaps in the visible presents important potential in the design of high efficient solar cells. CsPbCl3, CsPbBr3 and CsPbI3 are stable compounds within this new family of semiconductors. By performing the first-principles calculation, we explore the structural, electronic and optical properties of CsPbCl3xBr3(1-x) and CsPbBr3xI3(1-x) with various compositions of halide atoms. Structural stability is demonstrated with halide atoms distributing randomly at the halide atomic sites. CsPbCl3xBr3(1-x) and CsPbBr3xI3(1-x) exhibit the modulation of their band gaps by varying the halide composition. Our results also indicate that CsPbCl3xBr3(1-x) and CsPbBr3xI3(1-x) with different halide compositions are suitable to application to solar cells for the general features are well preserved. Good absorption to lights of different wavelengths has been obtained in these mixed halide perovskites.

Binary and ternary (liquid + liquid) equilibrium for {methylcyclohexane (1) + toluene (2) + 1-hexyl-3-methylimidazolium tetracyanoborate (3)/1-butyl-3-methylimidazolium tetracyanoborate (3)}

International Nuclear Information System (INIS)

Gutierrez, Juan Pablo; Meindersma, Wytze; Haan, Andre B. de

2011-01-01

Highlights: → Binary and ternary extractions for two ionic liquids with organic compounds were measured. → NRTL and UNIQUAC thermodynamic models were used to fit the experimental data. → UNIQUAC model gives better predictions than the NRTL model. → Ionic liquids showed interesting properties as solvents to be applied in separation processes. - Abstract: This paper focuses on the study of the solubility behaviour of 1-hexyl-3-methylimidazolium tetracyanoborate [HMIM][TCB] and 1-butyl-3-methylimidazolium tetracyanoborate [BMIM][TCB] in combination with methylcyclohexane and toluene as representatives for non-aromatic and aromatic components. Binary and ternary (liquid + liquid) equilibrium data were collected at three different temperatures and at atmospheric pressure (0.1 MPa). The experimental data were well-correlated with the NRTL and UNIQUAC thermodynamic models; however, the UNIQUAC model gave better predictions than the NRTL, with a root mean square error below 0.97%. The non-aromatic/aromatic selectivities of the ionic liquids make them suitable solvents to be used in extractive distillation processes.

Synthesis and characterization of new N-heterocyclic carbene ligands: 1,3-Bis(acetamide)imidazol-3-ium bromide and 3-(acetamide)-1-(3-aminopropyl)-1H-imidazol-3-ium bromide

Science.gov (United States)

Turkyilmaz, Murat; Uluçam, Gühergül; Aktaş, Şaban; Okan, S. Erol

2017-05-01

Two new pincer type N-heterocyclic carbene ligands were synthesized. The compounds were characterized by FTIR, NMR (1H, 13C) GC-MS and elemental analyses. They were also both modelled by DFT calculations as the crystal structure of 1,3-bis(acetamide)imidazol-3-ium bromide was determined by XRD which is an orthorhombic system with space group P21212. The structural analyses in gas phase were realized by comparing the experimental NMR and IR spectra with those of the theoretical calculations. In vitro biological activities of the molecules were determined and found that one of them exhibits significant cytotoxic activity.

1,2,3,3-Tetramethyl-7-nitro-3,4-dihydroisoquinolinium tetrafluoroborate

Directory of Open Access Journals (Sweden)

Mouna Bouzid

2016-04-01

Full Text Available The title salt, C13H17N2O2+·BF4−, was prepared by the methylation of the imine with Meerwein salt in dichloromethane. The asymmetric unit comprises a 1,3,3-trimethyl-7-nitro-3,4-dihydroisoquinolinium cation and a tetrafluoroborate anion. The coordination around the boron atom in the tetrafluoroborate anion is tetrahedral. The heterocyclic ring adopts a half-chair conformation. The crystal packing is governed by means of C—H...F contacts, which lead to the formation of a three-dimensional network.

CH3NH3Pb1-xMgxI3 perovskites as environmentally friendly photovoltaic materials

Science.gov (United States)

Zhang, Y. D.; Feng, J.

2018-01-01

In an effort to reduce the toxicity of Pb in perovskite solar cells, the band structures, electron and hole effective masses, and electronic and optical properties of the novel perovskites CH3NH3Pb1-xMgxI3 were predicted using density functional theory with the scalar relativistic generalized gradient approximation. The calculation results indicated that the introduction of the Mg component caused the band gaps of the CH3NH3Pb1-xMgxI3 compounds to exceed that of CH3NH3PbI3. The calculated absorption coefficients of the CH3NH3PbI3 and CH3NH3Pb1-xMgxI3 perovskites revealed that substituting 12.5 mol % of the Pb in CH3NH3PbI3 with Mg had little effect on the absorption ability. Surprisingly, it was also found that CH3NH3Pb0.75Mg0.25I3 retained up to 83% of the absorption performance relative to CH3NH3PbI3. This indicates that the amount of toxic Pb used in perovskite solar cells could be reduced by a quarter while retaining over 80% of the light-absorbing ability. In general, these novel CH3NH3Pb1-xMgxI3 (x ≤ 0.25) perovskites represent promising candidates for environmentally friendly light-harvesting materials for use in solar cells.

Synthesis and X-ray Structural Studies of a Substituted 2,3,4,5-Tetrahydro-1H-3-benzazonine and a 1,2,3,5-Tetrahydro-4,3-benzoxazonine

Directory of Open Access Journals (Sweden)

Timothy S. Bailey

2014-12-01

Full Text Available Using a common 1-(1-phenylethenyl-1,2,3,4-tetrahydroisoquinoline precursor to the required ylide or N-oxide intermediate, the Stevens [2,3] and analogous Meisenheimer [2,3] sigmatropic rearrangements have been applied to afford concise syntheses of phenyl -substituted representatives of each of the reduced 1H-3-benzazonine and 4,3-benzoxazonine systems, respectively. Single crystal X-ray structure determinations were employed to define the conformational characteristics for each ring type.

Synthesis, urease inhibition, antioxidant and antibacterial studies of some 4-amino-5-aryl-3H-1,2,4-triazole-3-thiones and their 3,6-disubstituted 1,2,4-triazolo[3,4-b]1,3,4-thiadiazole derivatives

International Nuclear Information System (INIS)

Hanif, Muhammad; Saleem, Muhammad; Rama, Nasim Hasan; Hussain, Muhammad Tahir; Zaib, Sumera; Aslam, Muhammad Adil M.; Iqbal, Jamshed; Jones, Peter G.

2012-01-01

A new series of 4-amino-5-aryl-3H-1,2,4-triazole-3-thiones, bearing various methoxybenzyl- and methoxyphenethyl groups, was synthesized by refluxing potassium hydrazinecarbodithioate salts in dilute aqueous solution of hydrazine hydrate. These salts were formed by the reaction of acid hydrazides and carbon disulfide in methanolic potassium hydroxide solution at 0-5 deg C. 4-Amino- 5-aryl-3H-1,2,4-triazole-3-thiones were condensed with different substituted aromatic acids to yield 3,6-disubstituted-1,2,4-triazolo[3,4-b]1,3,4-thiadiazoles. The structures of the synthesized compounds were characterized by infrared (IR), 1 H and 13 C nuclear magnetic resonance (NMR), elemental analysis and mass spectrometric (MS) studies. All the synthesized compounds were screened for their urease inhibition, antioxidant and antibacterial activities. Some compounds showed excellent urease inhibition activity, more than the standard drug. Others exhibited potent antioxidant activity. All the compounds showed significant antibacterial activities as compared to the standard drug. (author)

Synthesis of Pyrazine-1,3-thiazine Hybrid Analogues as Antiviral Agent Against HIV-1, Influenza A (H1N1), Enterovirus 71 (EV71), and Coxsackievirus B3 (CVB3).

Science.gov (United States)

Wu, Hong-Min; Zhou, Kuo; Wu, Tao; Cao, Yin-Guang

2016-09-01

A novel series of pyrazine-1,3-thiazine hybrid conjugates were synthesized in excellent yield. These derivatives were subsequently tested against human immunodeficiency virus (HIV-1); hemagglutinin type 1 and neuraminidase type 1-'influenza' A (H1N1) virus; enterovirus 71 (EV71); and coxsackievirus B3. The effect of these conjugates on the key enzymes responsible for the progression of these viral infections was also illustrated via enzyme-based assay, such as HIV-1 reverse transcriptase (RT) and neuraminidase, where entire tested molecules showed considerable inhibition. Particularly, among the tested derivatives, compound 3k was identified as most promising inhibitor of HIV-1 with 94% of inhibition (IC50 3.26 ± 0.2 μm). Moreover, the compound 3d was found to be the most potent analogue to inhibit the H1N1 virus with IC50 of 5.32 ± 0.4 μm together with inhibition of the neuraminidase enzyme (IC50 11.24 ± 1.1 μm). In regard to inhibitory activity against enterovirus 71 (EV71) and coxsackievirus B3 (CVB3), the tested derivatives showed considerable inhibition of infection. Molecular docking studies were also performed for the most promising inhibitors with their corresponding target protein to exemplify the structural requirement for better inhibitory activity. The results of inhibitory assay showed that designed molecules possess considerable inhibitory activity against the virus tested. © 2016 John Wiley & Sons A/S.

Study of Ni2-Mn-Ga phase formation by magnetron sputtering film deposition at low temperature onto Si substrates and LaNiO3/Pb(Ti,Zr)O3 buffer

International Nuclear Information System (INIS)

Figueiras, F.; Rauwel, E.; Amaral, V. S.; Vyshatko, N.; Kholkin, A. L.; Soyer, C.; Remiens, D.; Shvartsman, V. V.; Borisov, P.; Kleemann, W.

2010-01-01

Film deposition of Ni 2 MnGa phaselike alloy by radio frequency (rf) magnetron sputtering was performed onto bare Si(100) substrates and LaNiO 3 /Pb(Ti,Zr)O 3 (LNO/PZT) ferroelectric buffer layer near room temperature. The prepared samples were characterized using conventional x-ray diffraction (XRD), superconducting quantum interference device, and electron dispersive x-ray spectroscopy from scanning electron microscope observations. The optimized films deposited under high rf power and low argon pressure present good surface quality and highly textured phase crystallization. The positioning distance between the substrate and the target-holder axis has some limited effect on the film's composition due to the specific diffusion behavior of each element in the sputtering plasma. Extended four pole high resolution XRD analysis allowed one to discriminate the intended Ni-Mn-Ga tetragonal martensitic phase induced by the (100) LNO/PZT oriented buffer. This low temperature process appears to be very promising, allowing separate control of the functional layer's properties, while trying to achieve high electromagnetoelastic coupling.

Synthesis and Characterization of Mono- and Bicycle Heterocyclic Derivatives Containing 1, 2,4-Triazole, 1,3,4-Thiadiazine and 1,3-Thiazole Rings

Directory of Open Access Journals (Sweden)

Navabeh Nami

2012-01-01

Full Text Available Reaction of tartaric acid with thiocarbohydrazide (2 and thiosemicarbazide (6 afforded 1,2-bis(4-amino-5-mercapto-4H-1,2,4-triazol-3-yl-ethane-1,2-diol (3 and 1,2-bis(5-mercapto-4H-1,2,4-triazol-3-yl-ethane-1,2-diol (7. Reaction of compounds 3 and 7 with DMAD (dimethylacety lendi carboxylate and DEAD (diethylacetylendicarboxylate gave 1,2-bis(7-[(z-methoxycarbonylmethylen]-5,6-dihydro-5H-6-one-[1,2,4] riazolo[3,4-b] [1,3,4] thiadiazin-3-yl-ethan-1,2-diol (4, 1,2-bis(7-[(z-ethoxycarbonylmethylen] -5,6-dihydro -5H-6-one-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl-ethan-1,2- diol (5 and 1,2-bis(6-[(z-methoxycarbonylmethylen]-5-oxo-[1,3]thiazolo[2,3-c] [1,2,4]triazol-3-yl-ethan-1,2-diol (8 in good yields.

Metabolism of 1,2,3,4-, 1,2,3,5-, and 1,2,4,5-tetrachlorobenzene in the squirrel monkey

International Nuclear Information System (INIS)

Schwartz, H.; Chu, I.; Villeneuve, D.C.; Benoit, F.M.

1987-01-01

The metabolism of three tetrachlorobenzene isomers (TeCB) was investigated in the squirrel monkey. The animals were administered orally 6 single doses of 14 C-labeled 1,2,3,4-, 1,2,4,5-, or 1,2,3,5-tetrachlorobenzene over a 3-wk period at levels ranging from 50 to 100 mg/kg body weight (b.w) and kept in individual metabolism cages to collect urine and feces for radioassay. Approximately 38% (1,2,3,4-TeCB), 36% (1,2,3,5-TeCB), and 18% (1,2,4,5-TeCB) of the doses were excreted respectively in the feces 48 h post administration. In monkeys dosed with 1,2,3,4-TeCB, unchanged compound accounted for 50% of the fecal radioactivity. Unchanged compound accounted for more than 50% of the fecal radioactivity found in the monkeys dosed with 1,2,3,5-TeCB. The fecal metabolites were identified in both groups. No metabolites were detected in the feces of monkeys dosed with 1,2,4,5-TeCB. While the fecal route represented the major route of excretion for 1,2,3,4-TeCB, the other two isomers were eliminated exclusively in the feces. The above data in the squirrel monkey are different from those obtained with the rat and the rabbit, and demonstrate the different metabolic pathways for the isomers

Improved cycling and high rate performance of core-shell LiFe1/3Mn1/3Co1/3PO4/carbon nanocomposites for lithium-ion batteries: Effect of the carbon source

International Nuclear Information System (INIS)

Li, Huanhuan; Chen, Yi; Chen, Long; Jiang, Haobin; Wang, Yaping; Wang, Hongbo; Li, Guochun; Li, Yunxing; Yuan, Yuan

2014-01-01

Highlights: • We report a fast microwave heating way to prepare LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /C. • The effects of different carbon sources were discussed in detail. • LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP2000 shows a discharge capacity of 160 mA h g −1 at 0.1 C. • LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP2000 elucidates excellent cyclic stability. • LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP2000 exhibits attractive rate capability. - Abstract: Core-shell type olivine solid solutions, LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /C, are synthesized via a very simple and rapid microwave heating route with different carbon sources. The obatined LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /C materials are characterized thoroughly by various analytical techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy-dispersive spectroscopy instrument. The particle sizes and distribution of the carbon layer of BP2000 carbon black coated LiFe 1/3 Mn 1/3 Co 1/3 PO 4 (LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP) are more uniform than that obtained from acetylene black (LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /AB) and Super P (LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /SP). Moreover, the LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP nanocomposite shows superior electrochemical properties such as high discharge capacity of 160 mA h g −1 at 0.1 C, excellent cyclic stability (143 mA h g −1 at 0.1 C after 30 cycles) and rate capability (76 mAh g −1 at 20 C), which are better than other two samples. Cyclic voltammetric and electrical tests disclose that the Li-ion diffusion, the reversibility of lithium extraction/insertion and electrical conductivity are significantly improved in LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP composite. Electrochemical impedance spectroscopy illustrates that LiFe 1/3 Mn 1/3 Co 1/3 PO 4 /BP composite electrode possesses low contact and charge-transfer impedances, which can lead to rapid electron transport during the electrochemical lithium insertion/extraction reaction. It is believed that olivine solid

Osteoblast-like MC3T3-E1 Cells Prefer Glycolysis for ATP Production but Adipocyte-like 3T3-L1 Cells Prefer Oxidative Phosphorylation.

Science.gov (United States)

Guntur, Anyonya R; Gerencser, Akos A; Le, Phuong T; DeMambro, Victoria E; Bornstein, Sheila A; Mookerjee, Shona A; Maridas, David E; Clemmons, David E; Brand, Martin D; Rosen, Clifford J

2018-06-01

Mesenchymal stromal cells (MSCs) are early progenitors that can differentiate into osteoblasts, chondrocytes, and adipocytes. We hypothesized that osteoblasts and adipocytes utilize distinct bioenergetic pathways during MSC differentiation. To test this hypothesis, we compared the bioenergetic profiles of preosteoblast MC3T3-E1 cells and calvarial osteoblasts with preadipocyte 3T3L1 cells, before and after differentiation. Differentiated MC3T3-E1 osteoblasts met adenosine triphosphate (ATP) demand mainly by glycolysis with minimal reserve glycolytic capacity, whereas nondifferentiated cells generated ATP through oxidative phosphorylation. A marked Crabtree effect (acute suppression of respiration by addition of glucose, observed in both MC3T3-E1 and calvarial osteoblasts) and smaller mitochondrial membrane potential in the differentiated osteoblasts, particularly those incubated at high glucose concentrations, indicated a suppression of oxidative phosphorylation compared with nondifferentiated osteoblasts. In contrast, both nondifferentiated and differentiated 3T3-L1 adipocytes met ATP demand primarily by oxidative phosphorylation despite a large unused reserve glycolytic capacity. In sum, we show that nondifferentiated precursor cells prefer to use oxidative phosphorylation to generate ATP; when they differentiate to osteoblasts, they gain a strong preference for glycolytic ATP generation, but when they differentiate to adipocytes, they retain the strong preference for oxidative phosphorylation. Unique metabolic programming in mesenchymal progenitor cells may influence cell fate and ultimately determine the degree of bone formation and/or the development of marrow adiposity. © 2018 American Society for Bone and Mineral Research. © 2018 American Society for Bone and Mineral Research.

Synthesis of Some New 1,3,4-Thiadiazole, Thiazole and Pyridine Derivatives Containing 1,2,3-Triazole Moiety

Directory of Open Access Journals (Sweden)

Nadia A. Abdelriheem

2017-02-01

Full Text Available In this study, 1-(5-Methyl-1-(p-tolyl-1H-1,2,3-triazol-4-ylethan-1-one, was reacted with Thiosemicarbazide, alkyl carbodithioate and benzaldehyde to give thiosemicarbazone, alkylidenehydrazinecarbodithioate and 3-phenylprop-2-en-1-one-1,2,3-triazole derivatives. The 1,3,4-thiadiazole derivatives containing the 1,2,3-triazole moiety were obtained via reaction of alkylidenecarbodithioate with hydrazonoyl halides. Also, hydrazonoyl halides were reacted with thiosemicarbazone and pyrazolylthioamide to give 1,3-thiazoles derivatives. Subsequently, 3-phenyl2-en-1-one was used to synthesize substituted pyridines and substituted nicotinic acid ester. The latter was converted to its azide compound which was reacted with aromatic amines and phenol to give substituted urea and phenylcarbamate containing 1,2,3-triazole moiety. The newly synthesized compounds were established by elemental analysis, spectral data and alternative synthesis whenever possible.

26 CFR 1.1368-3 - Examples.

Science.gov (United States)

2010-04-01

... 26 Internal Revenue 11 2010-04-01 2010-04-01 true Examples. 1.1368-3 Section 1.1368-3 Internal... TAXES Small Business Corporations and Their Shareholders § 1.1368-3 Examples. The principles of §§ 1.1368-1 and 1.1368-2 are illustrated by the examples below. In each example Corporation S is a calendar...

17 CFR 270.3c-1 - Definition of beneficial ownership for certain 3(c)(1) funds.

Science.gov (United States)

2010-04-01

... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Definition of beneficial... AND EXCHANGE COMMISSION (CONTINUED) RULES AND REGULATIONS, INVESTMENT COMPANY ACT OF 1940 § 270.3c-1 Definition of beneficial ownership for certain 3(c)(1) funds. (a) As used in this section: (1) The term...

Suppression of lipin-1 expression increases monocyte chemoattractant protein-1 expression in 3T3-L1 adipocytes

International Nuclear Information System (INIS)

Takahashi, Nobuhiko; Yoshizaki, Takayuki; Hiranaka, Natsumi; Suzuki, Takeshi; Yui, Tomoo; Akanuma, Masayasu; Oka, Kazuya; Kanazawa, Kaoru; Yoshida, Mika; Naito, Sumiyoshi; Fujiya, Mikihiro; Kohgo, Yutaka; Ieko, Masahiro

2011-01-01

Highlights: ► Lipin-1 affects lipid metabolism, adipocyte differentiation, and transcription. ► Adipose lipin-1 expression is reduced in obesity. ► Lipin-1 depletion using siRNA in 3T3-L1 adipocytes increased MCP-1 expression. ► Lipin-1 is involved in adipose inflammation. -- Abstract: Lipin-1 plays a crucial role in the regulation of lipid metabolism and cell differentiation in adipocytes. Expression of adipose lipin-1 is reduced in obesity, and metabolic syndrome. However, the significance of this reduction remains unclear. This study investigated if and how reduced lipin-1 expression affected metabolism. We assessed mRNA expression levels of various genes related to adipocyte metabolism in lipin-1-depleted 3T3-L1 adipocytes by introducing its specific small interfering RNA. In lipin-1-depleted adipocytes, mRNA and protein expression levels of monocyte chemoattractant protein-1 (MCP-1) were significantly increased, although the other genes tested were not altered. The conditioned media from the cells promoted monocyte chemotaxis. The increase in MCP-1 expression was prevented by treatment with quinazoline or salicylate, inhibitors of nuclear factor-κB activation. Because MCP-1 is related to adipose inflammation and systemic insulin resistance, these results suggest that a reduction in adipose lipin-1 in obesity may exacerbate adipose inflammation and metabolism.

Suppression of lipin-1 expression increases monocyte chemoattractant protein-1 expression in 3T3-L1 adipocytes

Energy Technology Data Exchange (ETDEWEB)

Takahashi, Nobuhiko, E-mail: ntkhs@hoku-iryo-u.ac.jp [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510 (Japan); Yoshizaki, Takayuki [Innovation Center, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065 (Japan); Hiranaka, Natsumi; Suzuki, Takeshi [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Yui, Tomoo; Akanuma, Masayasu; Oka, Kazuya [Department of Fixed Prosthodontics and Oral Implantology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Kanazawa, Kaoru [Department of Dental Anesthesiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Yoshida, Mika; Naito, Sumiyoshi [Department of Clinical Laboratory, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan); Fujiya, Mikihiro; Kohgo, Yutaka [Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510 (Japan); Ieko, Masahiro [Department of Internal Medicine, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Toubetsu, Hokkaido 061-0023 (Japan)

2011-11-11

Highlights: Black-Right-Pointing-Pointer Lipin-1 affects lipid metabolism, adipocyte differentiation, and transcription. Black-Right-Pointing-Pointer Adipose lipin-1 expression is reduced in obesity. Black-Right-Pointing-Pointer Lipin-1 depletion using siRNA in 3T3-L1 adipocytes increased MCP-1 expression. Black-Right-Pointing-Pointer Lipin-1 is involved in adipose inflammation. -- Abstract: Lipin-1 plays a crucial role in the regulation of lipid metabolism and cell differentiation in adipocytes. Expression of adipose lipin-1 is reduced in obesity, and metabolic syndrome. However, the significance of this reduction remains unclear. This study investigated if and how reduced lipin-1 expression affected metabolism. We assessed mRNA expression levels of various genes related to adipocyte metabolism in lipin-1-depleted 3T3-L1 adipocytes by introducing its specific small interfering RNA. In lipin-1-depleted adipocytes, mRNA and protein expression levels of monocyte chemoattractant protein-1 (MCP-1) were significantly increased, although the other genes tested were not altered. The conditioned media from the cells promoted monocyte chemotaxis. The increase in MCP-1 expression was prevented by treatment with quinazoline or salicylate, inhibitors of nuclear factor-{kappa}B activation. Because MCP-1 is related to adipose inflammation and systemic insulin resistance, these results suggest that a reduction in adipose lipin-1 in obesity may exacerbate adipose inflammation and metabolism.

Giant magnetoresistance on low field in non-stoichiometric La2/3Ca1/3Mn1-xO3

International Nuclear Information System (INIS)

Zhao Lifeng; Chen Wei; Shang Jingling; Chen Lei; Liu Sheng; Xia Zhengcai; Yuan Songliu

2005-01-01

Electrical transport and low field magnetoresistance (MR) are reported in the La 2/3 Ca 1/3 Mn 1-x O 3 (x = 0-0.16) samples, which are prepared by the sol-gel method followed by a sintering treatment at 1100 0 C. Experimental results show, for x = 0.06, an MR platform is observed in a temperature ∼200 K under the magnetic field of 0.5 T. With an increase in x, the MR effect gets augmented. For the sample with x = 0.16, its MR peak is as high as 50%

Omega-3 polyunsaturated fatty acid has an anti-oxidant effect via the Nrf-2/HO-1 pathway in 3T3-L1 adipocytes

International Nuclear Information System (INIS)

Kusunoki, Chisato; Yang, Liu; Yoshizaki, Takeshi; Nakagawa, Fumiyuki; Ishikado, Atsushi; Kondo, Motoyuki; Morino, Katsutaro; Sekine, Osamu; Ugi, Satoshi; Nishio, Yoshihiko; Kashiwagi, Atsunori; Maegawa, Hiroshi

2013-01-01

Highlights: ► Omega-3 PUFA has a direct anti-oxidant effect in adipocytes. ► EPA and DHA induce HO-1 expression in 3T3-L1 adipocytes. ► Omega-3 PUFA and its end-product, 4-HHE, activates the Nrf-2/HO-1 pathway. ► Omega-3 PUFA protects against oxidative stress-induced cytotoxicity. -- Abstract: Oxidative stress is produced in adipose tissue of obese subjects and has been associated with obesity-related disorders. Recent studies have shown that omega-3 polyunsaturated fatty acid (ω3-PUFA) has beneficial effects in preventing atherosclerotic diseases and insulin resistance in adipose tissue. However, the role of ω3-PUFA on adipocytes has not been elucidated. In this study, 3T3-L1 adipocytes were treated with ω3-PUFA and its metabolites, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), or 4-hydroxy hexenal (4-HHE). ω3-PUFA and its metabolites dose-dependently increased mRNA and protein levels of the anti-oxidative enzyme, heme oxygenase-1 (HO-1); whereas no changes in the well-known anti-oxidant molecules, superoxide dismutase, catalase, and glutathione peroxidase, were observed. Knockdown of nuclear factor erythroid 2-related factor 2 (Nrf-2) significantly reduced EPA, DHA or 4-HHE-induced HO-1 mRNA and protein expression. Also, pretreatment with ω3-PUFA prevented H 2 O 2 -induced cytotoxicity in a HO-1 dependent manner. In conclusion, treatment with EPA and DHA induced HO-1 through the activation of Nrf-2 and prevented oxidative stress in 3T3-L1 adipocytes. This anti-oxidant defense may be of high therapeutic value for clinical conditions associated with systemic oxidative stress.

50 CFR 3.1 - Discrimination prohibited.

Science.gov (United States)

2010-10-01

... 50 Wildlife and Fisheries 1 2010-10-01 2010-10-01 false Discrimination prohibited. 3.1 Section 3.1... PROVISIONS NONDISCRIMINATION-CONTRACTS, PERMITS, AND USE OF FACILITIES § 3.1 Discrimination prohibited. No..., be denied the benefits of, or be otherwise subjected to any form of discrimination or segregation...

1,3- and 1,4-Substituted tetrazolium salts

International Nuclear Information System (INIS)

Voitekhovich, Sergei V; Gaponik, Pavel N; Ivashkevich, Oleg A

2002-01-01

The published data on the synthesis, physicochemical properties, structures and reactions of 1,3-(1,3,5)- and 1,4-(1,4,5)-substituted tetrazolium salts are systematised and generalised. Their applications as starting compounds in the preparative chemistry of heterocyclic derivatives and some other branches of science and technology are reviewed. The bibliography includes 122 references.

Fundamentals of the 3-3-1 model with heavy leptons

Science.gov (United States)

Correia, F. C.

2018-04-01

This work is a brief presentation of the theory based on the {SU}{(3)}c \\otimes {SU}{(3)}L\\otimes U{(1)}X gauge group in the presence of heavy leptons. Recent studies [1] have considered a set of four possible variants for the 3-3-1HL, whose content arises according to the so-denoted variable β. Since it has been argued about the presence of stable charged particles in this sort of model, we divide the different sectors of the Lagrangian between universal and specific vertices, and conclude that the omission of β-dependent terms in the potential may induce discrete symmetry for the versions defined by | β | =\\sqrt{3}. In the context of | β | =\\tfrac{1}{\\sqrt{3}}, where the new degrees of freedom have the same standard electric charges, additional Yukawa interactions may create decay channels into the SM sector. Furthermore, motivated by a general consequence of the Goldstone theorem, a method of diagonalization by parts is introduced in the Scalar sector and provides a clarification on the definition of mass eigenstates. In summary, we develop the most complete set of terms allowed by the symmetry group and resolve their definitive pieces in order to justify the model description present in the literature.

Danmarkshistorisk debat 1-3

DEFF Research Database (Denmark)

Jensen, Kurt Villads

2011-01-01

tre udsendelser på you tube http://www.youtube.com/watch?v=X_fhKCG2inQ&feature=results_main&playnext=1&list=PLF0F929EE31C1542A og på Danmarkshistorie.dk. 3 x 7-8 minutter......tre udsendelser på you tube http://www.youtube.com/watch?v=X_fhKCG2inQ&feature=results_main&playnext=1&list=PLF0F929EE31C1542A og på Danmarkshistorie.dk. 3 x 7-8 minutter...

Omega-3 polyunsaturated fatty acid has an anti-oxidant effect via the Nrf-2/HO-1 pathway in 3T3-L1 adipocytes

Energy Technology Data Exchange (ETDEWEB)

Kusunoki, Chisato, E-mail: yosizaki@belle.shiga-med.ac.jp [Department of Medicine, Shiga University of Medical Science, Seta Tsukinowa-Cho, Otsu, Shiga 520-2192 (Japan); Yang, Liu; Yoshizaki, Takeshi; Nakagawa, Fumiyuki; Ishikado, Atsushi; Kondo, Motoyuki; Morino, Katsutaro; Sekine, Osamu; Ugi, Satoshi [Department of Medicine, Shiga University of Medical Science, Seta Tsukinowa-Cho, Otsu, Shiga 520-2192 (Japan); Nishio, Yoshihiko [Division of Diabetes, Metabolism and Endocrinology, Department of Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544 (Japan); Kashiwagi, Atsunori; Maegawa, Hiroshi [Department of Medicine, Shiga University of Medical Science, Seta Tsukinowa-Cho, Otsu, Shiga 520-2192 (Japan)

2013-01-04

Highlights: Black-Right-Pointing-Pointer Omega-3 PUFA has a direct anti-oxidant effect in adipocytes. Black-Right-Pointing-Pointer EPA and DHA induce HO-1 expression in 3T3-L1 adipocytes. Black-Right-Pointing-Pointer Omega-3 PUFA and its end-product, 4-HHE, activates the Nrf-2/HO-1 pathway. Black-Right-Pointing-Pointer Omega-3 PUFA protects against oxidative stress-induced cytotoxicity. -- Abstract: Oxidative stress is produced in adipose tissue of obese subjects and has been associated with obesity-related disorders. Recent studies have shown that omega-3 polyunsaturated fatty acid ({omega}3-PUFA) has beneficial effects in preventing atherosclerotic diseases and insulin resistance in adipose tissue. However, the role of {omega}3-PUFA on adipocytes has not been elucidated. In this study, 3T3-L1 adipocytes were treated with {omega}3-PUFA and its metabolites, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), or 4-hydroxy hexenal (4-HHE). {omega}3-PUFA and its metabolites dose-dependently increased mRNA and protein levels of the anti-oxidative enzyme, heme oxygenase-1 (HO-1); whereas no changes in the well-known anti-oxidant molecules, superoxide dismutase, catalase, and glutathione peroxidase, were observed. Knockdown of nuclear factor erythroid 2-related factor 2 (Nrf-2) significantly reduced EPA, DHA or 4-HHE-induced HO-1 mRNA and protein expression. Also, pretreatment with {omega}3-PUFA prevented H{sub 2}O{sub 2}-induced cytotoxicity in a HO-1 dependent manner. In conclusion, treatment with EPA and DHA induced HO-1 through the activation of Nrf-2 and prevented oxidative stress in 3T3-L1 adipocytes. This anti-oxidant defense may be of high therapeutic value for clinical conditions associated with systemic oxidative stress.

Trimethyl 3,3′,3′′-(benzene-1,3,5-triyltripropynoate

Directory of Open Access Journals (Sweden)

Felix Katzsch

2016-04-01

Full Text Available In the title compound, C18H12O6, the alkyne bonds are distorted, featuring bond angles around the C—C[triple-bond]C—C group of 173.6 (1/179.0 (1, 178.1 (1/178.4 (1 and 174.9 (1/175.9 (1°, and the ester groups make angles of 3.5 (1, 13.8 (1 and 14.5 (1° with the central benzene ring. In the crystal, molecules are connected in layers parallel to (131 by weak C—H...O hydrogen bonds, giving rise to a system of hydrogen-bonded ring motifs with graph sets R22(14 and R44(22. The layers are linked by C—H...O and C—H...π contacts.

IRIS Toxicological Review of Hexahydro-1,3,5-Trinitro-1,3,5 ...

Science.gov (United States)

The IRIS Toxicological Review of Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) was released for external peer review in September 2016. The EPA’s Science Advisory Board’s (SAB) Chemical Assessment Advisory Committee (CAAC) will conduct a peer review of the scientific basis supporting the RDX assessment and release a final report of their review. Information regarding the peer review can be found on the SAB website. EPA is undertaking an update of the Integrated Risk Information System (IRIS) health assessment for RDX. The outcome of this project is an updated Toxicological Review and IRIS Summary for RDX that will be entered into the IRIS database.

Synthesis and Molecular Structures of Two [1,4-bis(3-pyridyl-2,3-diazo-1,3-butadiene]-dichloro-Zn(II Coordination Polymers

Directory of Open Access Journals (Sweden)

Hsin-Ta Wang

2006-08-01

Full Text Available Two novel coordination polymers with 3D metal-organic frameworks (MOFs have been synthesized by reacting 1,4-bis(3-pyridyl-2,3-diazo-1,3-butadiene (L with zinc dichloride. Both compounds have the same repeating unit consisting of a distorted tetrahedral Zn(II center coordinated by two chlorides and two pyridyl nitrogen atoms of two bridging bismonodentate L ligands, however, different structural conformations have been found, one forming a helical chain and the other producing a square-wave chain. The intermolecular C−H···Cl hydrogen bonds in 1 and 2 play important roles in the formation of three-dimensional coordination polymers. Compound 1 crystallized in an orthorhombic space group Pna21 with a = 7.9652(3, b = 21.4716(7, c = 8.2491(3Å, V = 1410.81(9 Å 3 and Z = 4. Compound 2 crystallized in a monoclinic space group P21/n with a = 9.1752(3, b = 14.5976(4, c = 10.3666(3 Å , β = 98.231(2°, V = 1374.16(7 Å 3 and Z = 4.

Biotransformation of trans-1-chloro-3,3,3-trifluoropropene (trans-HCFO-1233zd)

Energy Technology Data Exchange (ETDEWEB)

Schmidt, Tobias [Institut für Toxikologie, Universität Würzburg, Versbacher Str. 9, 97078 Würzburg (Germany); Bertermann, Rüdiger [Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg (Germany); Rusch, George M.; Tveit, Ann [Honeywell, P.O. Box 1057, Morristown, NJ 07962-1057 (United States); Dekant, Wolfgang, E-mail: dekant@toxi.uni-wuerzburg.de [Institut für Toxikologie, Universität Würzburg, Versbacher Str. 9, 97078 Würzburg (Germany)

2013-05-01

trans-1-Chloro-3,3,3-trifluoropropene (trans-HCFO-1233zd) is a novel foam blowing and precision cleaning agent with a very low impact for global warming and ozone depletion. trans-HCFO-1233zd also has a low potential for toxicity in rodents and is negative in genotoxicity testing. The biotransformation of trans-HCFO-1233zd and kinetics of metabolite excretion with urine were assessed in vitro and in animals after inhalation exposures. For in vitro characterization, liver microsomes from rats, rabbits and humans were incubated with trans-HCFO-1233zd. Male Sprague Dawley rats and female New Zealand White rabbits were exposed to 2,000, 5,000 and 10,000 ppm for 6 h and urine was collected for 48 h after the end of the exposure. Study specimens were analyzed for metabolites using {sup 19}F NMR, LC-MS/MS and GC/MS. S-(3,3,3-trifluoro-trans-propenyl)-glutathione was identified as predominant metabolite of trans-HCFO-1233zd in all microsomal incubation experiments in the presence of glutathione. Products of the oxidative biotransformation of trans-HCFO-1233zd were only minor metabolites when glutathione was present. In rats, both 3,3,3-trifluorolactic acid and N-acetyl-(3,3,3-trifluoro-trans-propenyl)-L-cysteine were observed as major urinary metabolites. 3,3,3-Trifluorolactic acid was not detected in the urine of rabbits. Quantitation showed rapid excretion of both metabolites in both species (t{sub 1/2} < 6 h) and the extent of biotransformation of trans-HCFO-1233zd was determined as approximately 0.01% of received dose in rabbits and approximately 0.002% in rats. trans-HCFO-1233zd undergoes both oxidative biotransformation and glutathione conjugation at very low rates. The low extent of biotransformation and the rapid excretion of metabolites formed are consistent with the very low potential for toxicity of trans-HCFO-1233zd in mammals. - Highlights: ► No lethality and clinical signs were observed. ► Glutathione S-transferase and cytochrome P-450 dependent

The CENP-T C-Terminus Is Exclusively Proximal to H3.1 and not to H3.2 or H3.3

Science.gov (United States)

Abendroth, Christian; Hofmeister, Antje; Hake, Sandra B.; Kamweru, Paul K.; Miess, Elke; Dornblut, Carsten; Küffner, Isabell; Deng, Wen; Leonhardt, Heinrich; Orthaus, Sandra; Hoischen, Christian; Diekmann, Stephan

2015-01-01

The kinetochore proteins assemble onto centromeric chromatin and regulate DNA segregation during cell division. The inner kinetochore proteins bind centromeres while most outer kinetochore proteins assemble at centromeres during mitosis, connecting the complex to microtubules. The centromere–kinetochore complex contains specific nucleosomes and nucleosomal particles. CENP-A replaces canonical H3 in centromeric nucleosomes, defining centromeric chromatin. Next to CENP-A, the CCAN multi-protein complex settles which contains CENP-T/W/S/X. These four proteins are described to form a nucleosomal particle at centromeres. We had found the CENP-T C-terminus and the CENP-S termini next to histone H3.1 but not to CENP-A, suggesting that the Constitutive Centromere-Associated Network (CCAN) bridges a CENP-A- and a H3-containing nucleosome. Here, we show by in vivo FRET that this proximity between CENP-T and H3 is specific for H3.1 but neither for the H3.1 mutants H3.1C96A and H3.1C110A nor for H3.2 or H3.3. We also found CENP-M next to H3.1 but not to these H3.1 mutants. Consistently, we detected CENP-M next to CENP-S. These data elucidate the local molecular neighborhood of CCAN proteins next to a H3.1-containing centromeric nucleosome. They also indicate an exclusive position of H3.1 clearly distinct from H3.2, thus documenting a local, and potentially also functional, difference between H3.1 and H3.2. PMID:25775162

The CENP-T C-Terminus Is Exclusively Proximal to H3.1 and not to H3.2 or H3.3

Directory of Open Access Journals (Sweden)

Christian Abendroth

2015-03-01

Full Text Available The kinetochore proteins assemble onto centromeric chromatin and regulate DNA segregation during cell division. The inner kinetochore proteins bind centromeres while most outer kinetochore proteins assemble at centromeres during mitosis, connecting the complex to microtubules. The centromere–kinetochore complex contains specific nucleosomes and nucleosomal particles. CENP-A replaces canonical H3 in centromeric nucleosomes, defining centromeric chromatin. Next to CENP-A, the CCAN multi-protein complex settles which contains CENP-T/W/S/X. These four proteins are described to form a nucleosomal particle at centromeres. We had found the CENP-T C-terminus and the CENP-S termini next to histone H3.1 but not to CENP-A, suggesting that the Constitutive Centromere-Associated Network (CCAN bridges a CENP-A- and a H3-containing nucleosome. Here, we show by in vivo FRET that this proximity between CENP-T and H3 is specific for H3.1 but neither for the H3.1 mutants H3.1C96A and H3.1C110A nor for H3.2 or H3.3. We also found CENP-M next to H3.1 but not to these H3.1 mutants. Consistently, we detected CENP-M next to CENP-S. These data elucidate the local molecular neighborhood of CCAN proteins next to a H3.1-containing centromeric nucleosome. They also indicate an exclusive position of H3.1 clearly distinct from H3.2, thus documenting a local, and potentially also functional, difference between H3.1 and H3.2.

Synthesis of the mevalonic acid labelled with "1"4C, "1"3C and "3H

International Nuclear Information System (INIS)

Rousseau, Bernard

1982-01-01

This thesis describes five new methods of synthesis of the (R,S) mevalonic acid adapted to the labelling with "1"4C and "1"3C in positions 4,5 or 5 or 3', or with tritium in position 3'. Three of them use the tri-oxa-2,4,10 adamantyl group as masked carboxyl function. The two others take benefit from the regioselectivity of the bis-hydro-boration of terminal acetylenics by the 9-borabicyclo [3-3-1]nonane. The acylation of the bis-trimethylsilyl lithiomalonate, and the chemistry of dithiannes are also involved. Acetylene and methyl iodide labelled with isotopes are used as cheap base products [fr

New Pb(Mg1/3Nb2/3)O3-Pb(In1/2Nb1/2)O3-PbZrO3-PbTiO3 Quaternary Ceramics: Morphotropic Phase Boundary Design and Electrical Properties.

Science.gov (United States)

Luo, Nengneng; Zhang, Shujun; Li, Qiang; Xu, Chao; Yang, Zhanlue; Yan, Qingfeng; Zhang, Yiling; Shrout, Thomas R

2016-06-22

Four series of Pb(Mg1/3Nb2/3)O3-Pb(In1/2Nb1/2)O3-PbZrO3-PbTiO3 (PMN-PIN-PZ-PT) quaternary ceramics with compositions located at the morphotropic phase boundary (MPB) regions were prepared. The MPBs of the multicomponent system were predicted using a linear combination rule and experimentally confirmed by X-ray powder diffraction and electrical measurement. The positions of MPBs in multicomponent systems were found in linear correlation with the tolerance factor and ionic radii of non-PT end-members. The phase structure, piezoelectric coefficient, electromechanical coupling coefficient, unipolar strains, and dielectric properties of as-prepared ceramics were systematically investigated. The largest d33s were obtained at S36.8, L37.4, M39.6, and N35.8, with the corresponding values of 580, 450, 420, and 530 pC/N, respectively, while the largest kps were found at S34.8, L37.4, M39.6, and N35.8, with the respective values of 0.54, 0.50, 0.47, and 0.53. The largest unipolar strain Smax and high-field piezoelectric strain coefficients d33* were also observed around the respective MPB regions. The rhombohedral-to-tetragonal phase transition temperature Trt increased with increasing PIN and PZ contents. Of particular importance is that high Trt of 140-197 °C was achieved in the M series with PZ and PIN contents being around 0.208 and 0.158, which will broaden the temperature usage range.

Elevated electrochemical performance of (NH4)3AlF6-coated 0.5Li2MnO3·0.5LiNi1/3Co1/3Mn1/3O2 cathode material via a novel wet coating method

International Nuclear Information System (INIS)

Xu, Guofeng; Li, Jianling; Xue, Qingrui; Dai, Yu; Zhou, Hongwei; Wang, Xindong; Kang, Feiyu

2014-01-01

A novel wet method of (NH 4 ) 3 AlF 6 coating was explored to enhance the electrochemical performance of Mn-based solid-solution cathode material 0.5Li 2 MnO 3 ·0.5LiNi 1/3 Co 1/3 Mn 1/3 O 2 . The X-ray powder diffraction patterns show that the coating material is pure-phase (NH 4 ) 3 AlF 6 and both pristine and coated samples can be indexed to hexagonal α-NaFeO 2 layered structure with space group of R-3 m. The field-emission scanning electron microscope images and the energy dispersive X-ray spectroscopy show that (NH 4 ) 3 AlF 6 is successfully coated on the surface of active particle. The (NH 4 ) 3 AlF 6 coated electrodes exhibit improved electrochemical performance, for instance, the initial charge-discharge efficiency was promoted by 5% (NH 4 ) 3 AlF 6 coating, the 1 wt.% and 3 wt.% coated electrodes deliver elevated cycling ability which is ascribed to the lower resistance between electrode and electrolyte as indicated by AC impedance measurement at different cycles. In addition, the coated-electrodes also give enhanced rate capability particularly for 1 wt.% NAF-coated electrode performing surprising capacity of 143.4 mAh g −1 at 5 C higher than that of 109.4 mAh g −1 for pristine electrode. Furthermore, the 1 wt.% NAF-coated electrode also shows improved cycle and rate performance at 55°C

Synthesis, characterization and anti cancer activity of some fluorinated 3,6-diaryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

Directory of Open Access Journals (Sweden)

Deepak Chowrasia

2017-05-01

Full Text Available A series of fluorinated 3,6-diaryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles (2a–2i was synthesized by condensation of various substituted 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiols (1a–1i with penta fluoro benzoic acid in good yields (60–80%. The synthesized compounds were screened for anticancer activity against three cancerous cell lines MCF7 (human breast cancer, SaOS-2 (human osteosarcoma and K562 (human myeloid leukemia. The compounds showed moderate to good antiproliferative potency against the studied cell lines. Among these, compound 2b showed higher antiproliferative activity (IC50 22.1, 19 and 15 μM against MCF7, SaOS-2 and K562, respectively while 2a exhibited least antiproliferative activity (IC50 30.2, 39 and 29.4 μM against MCF7, SaOS-2 and K562 cells, respectively. Therefore, the present study demonstrates that fluorine substituted 3,6-diaryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles would be a better prospective in the development of anticancer drugs.

Planarity of substituted pyrrole and furan rings in (3R*, 1'S*, 3'R*)-3-(1'-tert-butylamino-1'H, 3'H-benzo[c] furan-3'- yl)-2-tert-butyl-2,3-dihydro-1H-benzo[c] pyrrol-1-one

Czech Academy of Sciences Publication Activity Database

Donkeng Dazie, Joel; Liška, Alan; Ludvík, Jiří; Fábry, Jan; Dušek, Michal; Eigner, Václav

2017-01-01

Roč. 232, č. 6 (2017), s. 441-452 ISSN 2194-4946 R&D Projects: GA ČR GA13-21704S; GA MŠk(CZ) LO1603 EU Projects: European Commission(CZ) CZ.2.16/3.1.00/24510 Institutional support: RVO:61388955 ; RVO:68378271 Keywords : crystal structure analysis * isobenzofuran * isoindolinone Subject RIV: CF - Physical ; Theoretical Chemistry; BM - Solid Matter Physics ; Magnetism (FZU-D) OBOR OECD: Physical chemistry; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D) Impact factor: 3.179, year: 2016

Synthesis and antitumoral activity of novel 3-(2-substituted-1,3,4-oxadiazol-5-yl) and 3-(5-substituted-1,2,4-triazol-3-yl) beta-carboline derivatives.

Science.gov (United States)

Formagio, Anelise S Nazari; Tonin, Lilian T Düsman; Foglio, Mary Ann; Madjarof, Christiana; de Carvalho, João Ernesto; da Costa, Willian Ferreira; Cardoso, Flávia P; Sarragiotto, Maria Helena

2008-11-15

Several novel 1-substituted-phenyl beta-carbolines bearing the 2-substituted-1,3,4-oxadiazol-5-yl and 5-substituted-1,2,4-triazol-3-yl groups at C-3 were synthesized and evaluated for their in vitro anticancer activity. The assay results pointed thirteen compounds with growth inhibition effect (GI(50)<100 microM) for all eight different types of human cancer cell lines tested. The beta-carbolines 7a and 7h, bearing the 3-(2-metylthio-1,3,4-oxadiazol-5-yl) group, displayed high selectivity and potent anticancer activity against ovarian cell line with GI(50) values lying in the nanomolar concentration range (GI(50)=10 nM for both compounds). The 1-(N,N-dimethylaminophenyl)-3-(5-thioxo-1,2,4-triazol-3-yl) beta-carboline (8g) was the most active compound, showing particular effectiveness on lung (GI(50)=0.06 microM), ovarian and renal cell lines. The potent anticancer activity presented for synthesized compounds 7a, 7h, and 8g, together with their easiness of synthesis, makes these compounds promising anticancer agents.

Eluohtliku tervisekahjustuse tekitamise katse. Riigikohtu kriminaalkolleegiumi otsus 3-1-1-68-12 ja seotud otsus 3-1-1-57-10 / Jaan Sootak

Index Scriptorium Estoniae

Sootak, Jaan, 1948-

2012-01-01

Kaastäideviimise problemaatikast ning kumulatiivse põhjuslikkuse ja suktsessiivse kaastäideviimise instituutidest Riigikohtu lahendite 3-1-1-68-12 ja 3-1-1-57-10 põhjal. Riigikohus asus seisukohale, et süüdistatavad vastutavad kuriteokatse eest

Synthesis of new 1H-1,2,3-triazole-1,4-naphthoquinones

Directory of Open Access Journals (Sweden)

Wagner O. Valença

2012-06-01

Full Text Available In this work, were synthesized new 1H-1,2,3-triazole-1,4-naphthoquinones via 1,3-dipolar cycloaddition reaction using CuI/acetonitrile without addition of base or ligand. The compounds (3a-i were obtained in moderate-to-good yields 45-92%. To prepare (3d, we obtain a mixture of (3d and (4 in a ratio 3:1, that it was difficult to separate. The low yield for the compound (3f can be also justified based in the formation of aminonaphthoquinone (4. The acetylation of (3h and (3i afforded the compounds (5 and (6 in 77% and 35% of yields, respectively. The low yield of (6 was due to formation of 35 % of the elimination product (7.

SYNTHESIS OF 1,2 FUSED SYSTEMS BASED ON THE 3-ARYLIDENE-5-PHENYL-1,2-DIHYDRO-3H-1,4- BENZODIAZEPINE-2-ONES

Directory of Open Access Journals (Sweden)

V. I. Pavlovsky

2014-12-01

Full Text Available By the reaction of 7-bromo-5-aryl-1,2-dihydro-3H-1,4-benzodiazepine-2-ones with Lawesson reagent, 7-bromo-5-aryl-1,2-dihydro-3H-1,4-benzodiazepine-2-tiones were synthesized from which 3-arylidene-7-bromo-2-hydrazino-5-phenyl-3H-1,4-benzodiazepines were obtained by the reaction with hydrazine hydrate. The condensation of 3-arylidene-7-bromo-2-hydrazino-5-phenyl-3H-1,4-benzodiazepines with triethylorthoformate (triethylorthoacetate or formic acid (acetic acid gave 4-arylidene-8-bromo-6-phenyl-4H-[1,2,4]triazolo[4,3-а][1,4]-benzodiazepines. Latter were also synthesized by the reaction of 7-bromo-5-aryl-1,2-dihydro-3H-1,4-benzodiazepine-2-tiones with acetylhydrazine. 4-Arylidene-8-bromo-6-phenyl-4H-[1,2,3,4] tetrazolo[1,5-а][1,4]-benzodiazepines were obtained by the reaction of 3-arylidene-7-bromo-2-hydrazino-5-phenyl-3H-1,4-benzodiazepines with sodium nitrite.

Benchmark test of JENDL-3T and -3T/Rev.1

International Nuclear Information System (INIS)

Takano, Hideki; Kaneko, Kunio.

1989-10-01

The fast reactor 70-group constant set JFS-3-J3T has been generated by using the JENDL-3T nuclear data. One-dimensional 21-benchmark cores and the ZPPR-9 core were analysed with the JFS-3-J3T set. The results obtained are summarized as follows: (1) The values of keff are underestimated by 0.6% for Pu-fueled cores and overestimated by 2% for U-fueled cores. (2) The central reaction rate ratio 239 σ f φ/ 235 σ f φ is in a good agreement with the experimental value, though 238 σ c φ/ 239 σ f φ and 238 σ f φ/ 235 σ f φ are overestimated. (3) Doppler and Na-void reactivities are in a good agreement with the measured data. (4) The prediction accuracy of radial reaction rate distributions are improved in the comparison of the results obtained with the JENDL-2 data. Furthermore, the benchmark test of JENDL-3T/Rev. 1 which was revised from JENDL-3T for several important nuclides has been again performed. It was shown that JENDL-3T/Rev. 1 would predict nuclear characteristics more satisfactorily than JENDL-3T. (author)

Development of analytical methods for the gas chromatographic determination of 1,2-epoxy-3-butene, 1,2:3,4-diepoxybutane, 3-butene-1,2-diol, 3,4-epoxybutane-1,2-diol and crotonaldehyde from perfusate samples of 1,3-butadiene exposed isolated mouse and rat livers

Energy Technology Data Exchange (ETDEWEB)

Bhowmik, S.; Schuster, A.; Filser, J.G.

2003-07-01

Mutagenicity and carcinogenicity of 1,3-butadiene (BD) highly probably results from epoxide metabolites as 1,2-epoxy-3-butene (EB), 1,2:3,4-diepoxybutane (DEB) and 3,4-epoxybutane-1,2-diol (EBD). A further metabolite crotonaldehyde (CA) has also been discussed to be relevant. So far, in BD exposed rodents only EB and DEB concentrations had been quantified. However, the methods used were either not very sensitive or instrumentally expensive. Therefore, the goal of the present work was to establish simple analytical methods selective and sensitive enough to determine all of these compounds and a further secondary BD intermediate, 3-butene-1,2-diol (B-diol), in BD exposed rodent livers. The once-through perfused liver system was chosen for testing the applicability of the methods to be developed, since it enables BD exposures of this quantitatively most relevant metabolising organ near to the in-vivo situation. All the metabolites were extracted from the aqueous perfusion medium and analysed using a gas chromatograph equipped with a mass selective detector (GC/MS) in the PCI mode. (orig.)

26 CFR 1.854-3 - Definitions.

Science.gov (United States)

2010-04-01

... 26 Internal Revenue 9 2010-04-01 2010-04-01 false Definitions. 1.854-3 Section 1.854-3 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Regulated Investment Companies and Real Estate Investment Trusts § 1.854-3 Definitions. (a) For...

Interface exchange parameters in La{sub 2/3}Ca{sub 1/3}Mn{sub 3}O/La{sub 1/3}Ca{sub 2/3}Mn{sub 3}O bilayers: a Monte Carlo approach

Energy Technology Data Exchange (ETDEWEB)

Restrepo-Parra, E., E-mail: erestrepopa@unal.edu.co [Universidad Nacional de Colombia-Sede Manizales, PCM Computational Applications, Manizales (Colombia); Londoño-Navarro, J. [Universidad Nacional de Colombia-Sede Manizales, PCM Computational Applications, Manizales (Colombia); Restrepo, J. [Grupo de Magnetismo y Simulación. Instituto de Física. Universidad de Antioquia. A.A. 1226, Medellín (Colombia)

2013-10-15

Ferromagnetic/antiferromagnetic (FM/AF) bilayers have been widely studied because they exhibit special phenomena, such as exchange bias and magnetoresistance. These effects are strongly influenced by interface behavior. In this work, a study of hysteresis loops in La{sub 2/3}Ca{sub 1/3}MnO{sub 3}/La{sub 1/3}Ca{sub 2/3}MnO{sub 3} bilayers is presented. Simulations were carried out using the Monte Carlo method combined with the Metropolis algorithm and Heisenberg model. The study was focused on determining the most suitable exchange parameters at the interface by applying the model proposed by Kiwi. This model considers the use of two interface exchange parameters to represent the anisotropy that occurs at the interface because of the contact between two phases (ferromagnetic and antiferromagnetic). These two interface exchange parameters were named J{sub I1} and J{sub I2}. Initially, we assumed J{sub I1} to be equal to J{sub I2} without presenting exchange bias. Then, J{sub I1} and J{sub I2} were assumed to be different. In this configuration, the exchange phenomenon appeared in the hysteresis loops. It was also observed that the exchange bias is strongly dependent on the ratio of J{sub I1} to J{sub I2}. As J{sub I1} increases, the exchange bias decreases slowly and becomes comparable to the effective exchange bias field, assuming that it only depends on ΔJ{sub I}=J{sub I1}−J{sub I2}. - Highlights: • Exchange bias is influenced by the type of interaction ions and exchange parameters. • An interface asymmetric is required for observing the exchange bias phenomenon. • Monte Carlo method allows simulating the exchange bias phenomenon in FM/AF systems.

Expression of proteins FGFR3, PI3K, AKT, p21Waf1/Cip1 and cyclins D1 and D3 in patients with T1 bladder tumours: clinical implications and prognostic significance.

Science.gov (United States)

Blanca Pedregosa, A M; Sánchez-González, Á; Carrasco Valiente, J; Ruiz García, J M; Gómez Gómez, E; López Beltrán, A; Requena Tapia, M J

2017-04-01

To determine the differential protein expression of biomarkers FGFR3, PI3K (subunits PI3Kp110α, PI3KClassIII, PI3Kp85), AKT, p21Waf1/Cip1 and cyclins D1 and D3 in T1 bladder cancer versus healthy tissue and to study their potential role as early recurrence markers. This is a prospective study that employed a total of 67 tissue samples (55 cases of T1 bladder tumours that underwent transurethral resection and 12 cases of adjacent healthy mucosa). The protein expression levels were assessed using Western blot, and the means and percentages were compared using Student's t-test and the chi-squared test. The survival analysis was conducted using the Kaplan-Meier method and the log-rank test. Greater protein expression was detected for FGFR3, PI3Kp110α, PI3KClassIII, cyclins D1 and D3 and p21Waf1/Cip1 in the tumour tissue than in the healthy mucosa. However, these differences were not significant for PI3Kp85 and AKT. We observed statistically significant correlations between early recurrence and PI3Kp110α, PI3KClassIII, PI3Kp85 and AKT (P=.003, P=.045, P=.050 and P=.028, respectively), between the tumour type (primary vs. recurrence) and cyclin D3 (P=.001), between the tumour size and FGFR3 (P=.035) and between multifocality and cyclin D1 (P=.039). The survival analysis selected FGFR3 (P=.024), PI3Kp110α (P=.014), PI3KClassIII (P=.042) and AKT (P=.008) as markers of early-recurrence-free survival. There is an increase in protein expression levels in bladder tumour tissue. The overexpression of FGFR3, PI3Kp110α, PI3KClassIII and AKT is associated with increased early-recurrence-free survival for patients with T1 bladder tumours. Copyright © 2016 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.

Heterologous expression of C. elegans fat-1 decreases the n-6/n-3 fatty acid ratio and inhibits adipogenesis in 3T3-L1 cells

International Nuclear Information System (INIS)

An, Lei; Pang, Yun-Wei; Gao, Hong-Mei; Tao, Li; Miao, Kai; Wu, Zhong-Hong

2012-01-01

Highlights: ► Expression of C. elegans fat-1 reduces the n-6/n-3 PUFA ratio in 3T3-L1 cells. ► fat-1 inhibits the proliferation and differentiation of 3T3-L1 preadipocytes. ► fat-1 reduces lipid deposition in 3T3-L1 adipocytes. ► The lower n-6/n-3 ratio induces apoptosis in 3T3-L1 adipocytes. -- Abstract: In general, a diet enriched in polyunsaturated fatty acids (PUFAs) inhibits the development of obesity and decreases adipose tissue. The specific impacts of n-3 and n-6 PUFAs on adipogenesis, however, have not been definitively determined. Traditional in vivo and in vitro supplementation studies have yielded inconsistent or even contradictory results, which likely reflect insufficiently controlled experimental systems. Caenorhabditiselegans fat-1 gene encodes an n-3 fatty acid desaturase, and its heterologous expression represents an effective method both for altering the n-6/n-3 PUFA ratio and for evaluating the biological effects of n-3 and n-6 PUFAs. We sought to determine whether a reduced n-6/n-3 ratio could influence adipogenesis in 3T3-L1 cells. Lentivirus-mediated introduction of the fat-1 gene into 3T3-L1 preadipocytes significantly reduced the n-6/n-3 ratio and inhibited preadipocyte proliferation and differentiation. In mature adipocytes, fat-1 expression reduced lipid deposition, as measured by Oil Red O staining, and induced apoptosis. Our results indicate that a reduced n-6/n-3 ratio inhibits adipogenesis through several mechanisms and that n-3 PUFAs more effectively inhibit adipogenesis (but not lipogenesis) than do n-6 PUFAs.

26 CFR 1.856-3 - Definitions.

Science.gov (United States)

2010-04-01

... 26 Internal Revenue 9 2010-04-01 2010-04-01 false Definitions. 1.856-3 Section 1.856-3 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Real Estate Investment Trusts § 1.856-3 Definitions. For purposes of the regulations under part II...

Conformations of 1,3,3,5,7,7-Hexamethyl-1,5-diazacyclooctane and Its Bis-BH(3) Adduct. Mono- and Bis-BH(3) Adducts of Di-Tertiary Amines.

Science.gov (United States)

Livant, P.; Majors, A. W.; Webb, T. R.

1996-05-03

A variable-temperature (1)H- and (13)C-NMR study revealed a conformational equilibrium for 1,3,3,5,7,7-hexamethyl-1,5-diazacyclooctane (4) having DeltaG() = 8.8 +/- 0.6 kcal/mol at 184 K. This activation barrier connects a major and a minor form of 4. Molecular mechanics calculations on 4 led to the conclusion that the major form is a set of twist-chair-chairs interconverting rapidly via the chair-chair and that the minor form is most likely a set of twist-boat-boats interconverting rapidly via the boat-boat. The proximity of the two nitrogen lone pairs in the major form of 4 made plausible the expectation that 4, as well as a related diamine with apposed nitrogens, 3,7-dimethyl-3,7-diazabicyclo[3.3.1]nonane (3), might bind a Lewis acid, namely BH(3), using both lone pairs simultaneously and equally. This proved not to be the case: for 3 only the bis-BH(3) adduct was found and for 4 the mono-BH(3) adduct utilized only one nitrogen lone pair. The structure of the bis-BH(3) adduct of 4 (12) was determined by X-ray crystallography to be a twist-boat-boat with BH(3)s cis. Molecular mechanics calculations on 12 were consistent with the solid state conformation found.

Detailed studies of a high-capacity electrode material for rechargeable batteries, Li2MnO3-LiCo(1/3)Ni(1/3)Mn(1/3)O2.

Science.gov (United States)

Yabuuchi, Naoaki; Yoshii, Kazuhiro; Myung, Seung-Taek; Nakai, Izumi; Komaba, Shinichi

2011-03-30

Lithium-excess manganese layered oxides, which are commonly described by the chemical formula zLi(2)MnO(3)-(1-z)LiMeO(2) (Me = Co, Ni, Mn, etc.), are of great importance as positive electrode materials for rechargeable lithium batteries. In this Article, Li(x)Co(0.13)Ni(0.13)Mn(0.54)O(2-δ) samples are prepared from Li(1.2)Ni(0.13)Co(0.13)Mn(0.54)O(2) (or 0.5Li(2)MnO(3)-0.5LiCo(1/3)Ni(1/3)Mn(1/3)O(2)) by an electrochemical oxidation/reduction process in an electrochemical cell to study a reaction mechanism in detail before and after charging across a voltage plateau at 4.5 V vs Li/Li(+). Changes of the bulk and surface structures are examined by synchrotron X-ray diffraction (SXRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectroscopy (SIMS). SXRD data show that simultaneous oxygen and lithium removal at the voltage plateau upon initial charge causes the structural rearrangement, including a cation migration process from metal to lithium layers, which is also supported by XAS. This is consistent with the mechanism proposed in the literature related to the Li-excess manganese layered oxides. Oxygen removal associated with the initial charge on the high voltage plateau causes oxygen molecule generation in the electrochemical cells. The oxygen molecules in the cell are electrochemically reduced in the subsequent discharge below 3.0 V, leading to the extra capacity. Surface analysis confirms the formation of the oxygen containing species, such as lithium carbonate, which accumulates on the electrode surface. The oxygen containing species are electrochemically decomposed upon second charge above 4.0 V. The results suggest that, in addition to the conventional transition metal redox reactions, at least some of the reversible capacity for the Li-excess manganese layered oxides originates from the electrochemical redox reaction of the oxygen molecules at the electrode surface.

Electromechanical behavior of [001]-textured Pb(Mg1/3Nb2/3)O3-PbTiO3 ceramics

Science.gov (United States)

Yan, Yongke; Wang, Yu. U.; Priya, Shashank

2012-05-01

[001]-textured Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) ceramics were synthesized by using templated grain growth method. Significantly high [001] texture degree corresponding to 0.98 Lotgering factor was achieved at 1 vol. % BaTiO3 template. Electromechanical properties for [001]-textured PMN-PT ceramics with 1 vol. % BaTiO3 were found to be d33 = 1000 pC/N, d31 = 371 pC/N, ɛr = 2591, and tanδ = ˜0.6%. Elastoelectric composite based modeling results showed that higher volume fraction of template reduces the overall dielectric constant and thus has adverse effect on the piezoelectric response. Clamping effect was modeled by deriving the changes in free energy as a function of applied electric field and microstructural boundary condition.

CH3NH3Pb1−xMgxI3 perovskites as environmentally friendly photovoltaic materials

Directory of Open Access Journals (Sweden)

Y. D. Zhang

2018-01-01

Full Text Available In an effort to reduce the toxicity of Pb in perovskite solar cells, the band structures, electron and hole effective masses, and electronic and optical properties of the novel perovskites CH3NH3Pb1−xMgxI3 were predicted using density functional theory with the scalar relativistic generalized gradient approximation. The calculation results indicated that the introduction of the Mg component caused the band gaps of the CH3NH3Pb1−xMgxI3 compounds to exceed that of CH3NH3PbI3. The calculated absorption coefficients of the CH3NH3PbI3 and CH3NH3Pb1−xMgxI3 perovskites revealed that substituting 12.5 mol % of the Pb in CH3NH3PbI3 with Mg had little effect on the absorption ability. Surprisingly, it was also found that CH3NH3Pb0.75Mg0.25I3 retained up to 83% of the absorption performance relative to CH3NH3PbI3. This indicates that the amount of toxic Pb used in perovskite solar cells could be reduced by a quarter while retaining over 80% of the light-absorbing ability. In general, these novel CH3NH3Pb1−xMgxI3 (x ≤ 0.25 perovskites represent promising candidates for environmentally friendly light-harvesting materials for use in solar cells.

Inhomogeneous ferrimagnetic-like behavior in Gd2/3Ca1/3MnO3 single crystals

International Nuclear Information System (INIS)

Haberkorn, N.; Larregola, S.; Franco, D.; Nieva, G.

2009-01-01

We present a study of the magnetic properties of Gd 2/3 Ca 1/3 MnO 3 single crystals at low temperatures, showing that this material behaves as an inhomogeneous ferrimagnet. In addition to small saturation magnetization at 5 K, we have found history dependent effects in the magnetization and the presence of exchange bias. These features are compatible with microscopic phase separation in the clean Gd 2/3 Ca 1/3 MnO 3 system studied

Preparation of Pb(Mg1/3Nb2/3)O3 by simultaneous precipitations

International Nuclear Information System (INIS)

Juiz, S.A.; Varela, J.A.; Santilli, C.V.; Pulcinelli, S.H.; Longo, E.

1990-01-01

Pb(Mg 1/3 Nb 2/3 )O 3 was obtained by simultaneous precipitation of Pb(NO 3 ) 2' Mg(NO 3 ) 2 . 6H 2 O and NH 4 H 2 /NbO(C 2 O 4 ) 3 ./3H 2 O in alkaline medium. DTA of the precipitates show the PMN formation between 700 and 750 0 C. XRD on powder calcined at 750 0 C indicates on other phases basiders PMN. Measurements of dielectric constants shows a Curie temperature shifted to -80 0 C. (author) [pt

Synthese, Stereochemie und pharmakologische Charakterisierung von 3,7-Diazabicyclo[3.3.1]nonan Derivaten als selektive kappa-Agonisten

OpenAIRE

Projahn, Holger

2005-01-01

In der vorliegenden Arbeit wird die Synthese von verschiedenen bicyclischen Substanzklassen gemäß des folgenden Syntheseschemas beschrieben. Es wurden verschiedene 2,4-di-(2-pyridyl)- oder 2,4-di-(3-fluorphenyl)-substituierte 9-Oxo-3,7-diazabicyclo[3.3.1]nonan-1,5-dicarbonsäurediester (9-Oxo-BNDS: 21-25, 27-55) synthetisiert, welche 1. teilweise als Vorstufen zur Synthese von 1,5-Di-(hydroxymethyl)-3,7-diazabicyclo[3.3.1]nonan-9-olen (Triole: 56-65) eingesetzt wurden, 2. teilweise als Vorstuf...

Platinum(0-1,3-divinyl-1,1,3,3-tetramethyldisiloxane Complex as a Pt Source for Pt/SnO2 Catalyst

Directory of Open Access Journals (Sweden)

Agnieszka Martyla

2014-01-01

Full Text Available This paper presents new preparation method of Pt/SnO2, an important catalytic system. Besides of its application as a heterogenic industrial catalyst, it is also used as a catalyst in electrochemical processes, especially in fuel cells. Platinum is commonly used as an anode catalyst in low temperature fuel cells, fuelled with alcohols of low molecular weight such as methanol. Platinum(0-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex was used as a precursor of metallic phase. The aim of the research was to obtain a highly active in electrochemical system Pt/SnO2 catalyst with low metal load. Considering small size of Pt crystallites, it should result in high activity of Pt/SnO2 system. The presented method of SnO2 synthesis allows for obtaining support consisting of nanoparticles. The effect of the thermal treatment on activity of Pt/SnO2 gel was demonstrated. The system properties were investigated using TEM, FTIR (ATR, and XRD techniques to describe its thermal structural evolution. The results showed two electrocatalytical activity peaks for drying at a temperature of 430 K and above 650 K.

1-(3,4-Dimethoxyphenylethanone

Directory of Open Access Journals (Sweden)

Heather A. Mills-Robles

2016-11-01

Full Text Available The title compound, C10H12O3, has a single near planar molecule in the asymmetric unit, with the non-H atoms possessing a mean deviation from planarity of 0.132 Å. The molecules dimerize in the solid state through C—H...O interactions. These dimers are further linked through parallel slipped π–π interactions of the aryl rings [intercentroid distance = 3.5444 (11 Å, interplanar distance = 3.3998 (12 Å, slippage = 1.002 (2 Å].

Heterologous expression of C. elegans fat-1 decreases the n-6/n-3 fatty acid ratio and inhibits adipogenesis in 3T3-L1 cells

Energy Technology Data Exchange (ETDEWEB)

An, Lei, E-mail: anleim@yahoo.com.cn [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); Pang, Yun-Wei, E-mail: yunweipang@126.com [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); Gao, Hong-Mei, E-mail: Gaohongmei_123@yahoo.cn [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); Research Unit for Animal Life Sciences, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Ibaraki-Iwama 319-0206 (Japan); Tao, Li, E-mail: Eunice8023@yahoo.cn [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin 130118 (China); Miao, Kai, E-mail: miaokai7@163.com [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); Wu, Zhong-Hong, E-mail: wuzhh@cau.edu.cn [Ministry of Agriculture Key Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193 (China); and others

2012-11-23

Highlights: Black-Right-Pointing-Pointer Expression of C. elegans fat-1 reduces the n-6/n-3 PUFA ratio in 3T3-L1 cells. Black-Right-Pointing-Pointer fat-1 inhibits the proliferation and differentiation of 3T3-L1 preadipocytes. Black-Right-Pointing-Pointer fat-1 reduces lipid deposition in 3T3-L1 adipocytes. Black-Right-Pointing-Pointer The lower n-6/n-3 ratio induces apoptosis in 3T3-L1 adipocytes. -- Abstract: In general, a diet enriched in polyunsaturated fatty acids (PUFAs) inhibits the development of obesity and decreases adipose tissue. The specific impacts of n-3 and n-6 PUFAs on adipogenesis, however, have not been definitively determined. Traditional in vivo and in vitro supplementation studies have yielded inconsistent or even contradictory results, which likely reflect insufficiently controlled experimental systems. Caenorhabditiselegans fat-1 gene encodes an n-3 fatty acid desaturase, and its heterologous expression represents an effective method both for altering the n-6/n-3 PUFA ratio and for evaluating the biological effects of n-3 and n-6 PUFAs. We sought to determine whether a reduced n-6/n-3 ratio could influence adipogenesis in 3T3-L1 cells. Lentivirus-mediated introduction of the fat-1 gene into 3T3-L1 preadipocytes significantly reduced the n-6/n-3 ratio and inhibited preadipocyte proliferation and differentiation. In mature adipocytes, fat-1 expression reduced lipid deposition, as measured by Oil Red O staining, and induced apoptosis. Our results indicate that a reduced n-6/n-3 ratio inhibits adipogenesis through several mechanisms and that n-3 PUFAs more effectively inhibit adipogenesis (but not lipogenesis) than do n-6 PUFAs.

Main metabolites of 1-(2-chloroethyl)-3-[1'-(5'-p-nitrobenzoyl-2',3'-isopropylidene)-alpha, beta-D-ribofuranosyl]-1-nitrosourea and 1-(2-chloroethyl)-3-(2',3', 4'-tri-O-acetyl-alpha, beta-D-ribopyranosyl)-1-nitrosourea in rats

International Nuclear Information System (INIS)

Madelmont, J.C.; Moreau, M.F.; Godeneche, D.; Duprat, J.; Plagne, R.; Meyniel, G.

1982-01-01

The metabolism of two glycosylnitrosoureas, 1-(2-chloroethyl)-3-[1'-(5'-p-nitrobenzoyl-2',3'-isopropylidene)-alpha, beta-D-ribofuranosyl]-1-nitrosourea (RFCNU) and 1-(2-chloroethyl)-3-(2',3',4'-tri-O-acetyl-alpha, beta-D-ribopyranosyl)-1-nitrosourea (RPCNU), has been investigated in the rat. With the label on the carboxyl moiety of RFCNU, we have shown that hydrolysis of the 4-nitrobenzoyl ester occurred to a large extent in vivo; 4-nitrobenzoic acid and its glucuronide were the major urinary metabolites. Two other minor metabolites and their glucuronides were identified as 4-aminobenzoic acid and 4-acetamidobenzoic acid. With the label on the chloroethyl moieties of RFCNU and RPCNU, we have shown that chloroethanol was a major degradation product of this alkylating part of the molecule. The concentration of chloroethanol in plasma vs. time has been determined. In urine, four metabolites derived from alkylated glutathione, namely thiodiacetic acid and its sulfoxide, N-acetylcarboxymethylcysteine, and N-acetylhydroxyethylcysteine, have been identified

Effect of Nb doping on electrochemical properties of LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} at high cutoff voltage for lithium-ion battery

Energy Technology Data Exchange (ETDEWEB)

Wu, Jiefan [School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130 (China); Liu, Hongguang, E-mail: hongguangliu_01@163.com [School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130 (China); CNOOC Tianjin Chemical Research & Design Institute, Tianjin 300131 (China); Ye, Xuehai; Xia, Jiping; Lu, Yang; Lin, Chaowang; Yu, Xiaowei [CNOOC Tianjin Chemical Research & Design Institute, Tianjin 300131 (China)

2015-09-25

Highlights: • Nb substituted LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3−x}Nb{sub x}O{sub 2} (x = 0–0.03) was prepared by sol–gel method. • 2% Nb-substituted sample showed better cycle performance at high cutoff voltage. • Ex situ analysis was used to show the structure changes of Nb-doped samples. - Abstract: Nb doped cathode materials with the formula LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3−x}Nb{sub x}O{sub 2} (x = 0, 0.01, 0.02, 0.03) have been prepared successfully by sol–gel method. The effect of Nb substitution on the crystal structure and electrochemical properties of LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} were studied systematically by X-ray diffraction (XRD) and various electrochemical measurements. The results showed Nb substitution played an important role in the good cycling performance of LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}. Charge/discharge tests revealed that LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3–0.02}Nb{sub 0.02}O{sub 2} showed a capacity retention of 94.1% at 1 C after 50 cycles in a high cutoff voltage range (3.0–4.6 V), while discharge capacity of LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} remains only 89.4% of that at 1 C. Ex-situ XRD analysis and EIS analysis indicated that the improved electrochemical properties of Nb-doped sample result from the more stable structure and lower resistance during the electrochemical cycling.

Bis[μ-1,2-bis(1H-imidazol-1-ylmethylbenzene-κ2N3:N3′]disilver(I 3-carboxylato-4-hydroxybenzenesulfonate methanol solvate trihydrate

Directory of Open Access Journals (Sweden)

Hong-Mei Sun

2009-09-01

Full Text Available In the title compound, [Ag2(C14H14N42](C7H4O6S·CH3OH·3H2O, the complex dication has a binuclear structure in which each AgI ion is two-coordinated in a slightly distorted linear coordination geometry. The two AgI atoms are bridged by two 1,2-bis[(1H-imidazol-1-ylmethyl]benzene (IBI ligands, forming a 22-membered ring. In the dication, π–π interactions are observed between the imidazole rings with centroid–centroid distances of 3.472 (3 and 3.636 (3 Å. In the crystal, the uncoordinated water molecules, anions and methanol solvent molecules are linked into chains along the b axis by O—H...O hydrogen bonds. In addition, π–π interactions are observed between the benzene rings of the IBI ligands, with a centroid–centroid distance of 3.776 (2 Å. The sulfonate group is disordered over two orientations with occupancies of 0.676 (12 and 0.324 (12.

Radiosynthesis and biological evaluation of "1"2"3 I(±)trans-2-hydroxy-5-((E)-3-(iodo)allyloxy)-3-(4-phenyl-1-piperazinyl) tetralin

International Nuclear Information System (INIS)

Assaad, T.; Alrayyes, A.

2013-01-01

This work reports both the radiolabeling and preliminary biodistribution results in rats brain of (±)-["1"2"3 I]-II. The novel benzovesamicol derivative (±)-["1"2"3 I]-II was successfully labeled with iodine-"1"2"3 from its corresponding n-tributyltin, with radiochemical purity greater than 97% and radiochemical yield in the range 50 - 55%. (±)-["1"2"3 I]- II showed a higher accumulation in striatum than in the other regions studied. To determine if (±)-["1"2"3 I]-II could provide an advantage compared to reference compound ["1"2"5 I]-IBVM, a kinetic study was carried out, at each point of the kinetic study, (±)-["1"2"3 I]-II showed a lower specific binding compared to ["1"2"5 I]-IBVM. Time activity curves of (±)-["1"2"3 I]-II confirmed that this compound inferior to ["1"2"5 I]-IBVM to explore the VAChT in vivo by SPECT. Moreover, it is well known that interaction at the VAChT binding site is enantioselective, and therefore, working with enantiomerically pure compounds, could improve the compound activity.(author)

2,4,6-Triamino-1,3,5-triazine-1,3-diium aquapentafluoridoaluminate

Directory of Open Access Journals (Sweden)

V. Maisonneuve

2008-04-01

Full Text Available The title compound, (C3H8N6[AlF5(H2O], was obtained by solvothermal synthesis from the reaction of aluminium hydroxide, 1,3,5-triazine-2,4,6-triamine (melamine, aqueous HF and water at 323 K for 48 h. The structure consists of [AlF5(H2O]2− octahedra and diprotonated melaminium cations. Cohesion is ensured by a three-dimensional network of hydrogen bonds.

Synthesis and biochemical evaluation of tritium-labeled 1-methyl-N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole-3-carboxa mide, a useful radioligand for 5HT3 receptors

International Nuclear Information System (INIS)

Robertson, D.W.; Bloomquist, W.; Cohen, M.L.; Reid, L.R.; Schenck, K.; Wong, D.T.

1990-01-01

The advent of potent, highly selective 5HT3 receptor antagonists has stimulated considerable interest in 5HT3 receptor mediated physiology and pharmacology. To permit detailed biochemical studies regarding interaction of the indazole class of serotonin (5HT) antagonists with 5HT3 receptors in multiple tissues, we synthesized 1-methyl-N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole- 3-carboxamide (LY278584, compound 9) in high specific activity, tritium-labeled form. This radioligand was selected as a synthetic target because of its potency as a 5HT3-receptor antagonist, its selectivity for this receptor viz a viz other 5HT-receptor subtypes, and the ability to readily incorporate three tritia via the indazole N-CH3 substituent. Alkylation of N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole-3-carboxamide (8) with sodium hydride and tritium-labeled iodomethane, followed by HPLC purification, resulted in [3H]-9 with a radiochemical purity of 99% and a specific activity of 80.5 Ci/mmol. This radioligand bound with high affinity to a single class of saturable recognition sites in membranes isolated from cerebral cortex of rat brain. The Kd was 0.69 nM and the Bmax was 16.9 fmol/mg of protein. The specific binding was excellent, and accounted for 83-93% of total binding at concentrations of 2 nM or less. The potencies of known 5HT3-receptor antagonists as inhibitors of [3H]-9 binding correlated well with their pharmacological receptor affinities as antagonists of 5HT-induced decreases in heart rate and contraction of guinea pig ileum, suggesting the central recognition site for this radioligand may be extremely similar to or identical with peripheral 5HT3 receptors

Isoxazolium N-ylides and 1-oxa-5-azahexa-1,3,5-trienes on the way from isoxazoles to 2H-1,3-oxazines

Directory of Open Access Journals (Sweden)

Alexander F. Khlebnikov

2014-08-01

Full Text Available Theoretical and experimental studies of the reaction of isoxazoles with diazo compounds show that the formation of 2H-1,3-oxazines proceeds via the formation of (3Z-1-oxa-5-azahexa-1,3,5-trienes which undergo a 6π-cyclization. The stationary points corresponding to the probable reaction intermediates, isoxazolium N-ylides, were located by DFT calculations at the B3LYP/6-31G(d level only for derivatives without a substituent in position 3 of the isoxazole ring. These isoxazolium N-ylides are thermodynamically and kinetically very unstable. According to the calculations and experimental results 2H-1,3-oxazines are usually more thermodynamically stable than the corresponding open-chain isomers, (3Z-1-oxa-5-azahexa-1,3,5-trienes. The exception are oxaazahexatrienes derived from 5-alkoxyisoxazoles, which are thermodynamically more stable than the corresponding 2H-1,3-oxazines. Therefore, the reaction of diazo esters with 5-alkoxyisoxazoles is a good approach to 1,4-di(alkoxycarbonyl-2-azabuta-1,3-dienes. The reaction conditions for the preparation of aryl- and halogen-substituted 2H-1,3-oxazines and 1,4-di(alkoxycarbonyl-2-azabuta-1,3-dienes from isoxazoles were investigated.

S-Alkylated/aralkylated 2-(1H-indol-3-yl-methyl)-1,3,4- oxadiazole-5 ...

African Journals Online (AJOL)

Purpose: To evaluate the antibacterial, enzyme-inhibitory and hemolytic activities of Salkylated/aralkylated 2-(1H-indol-3-ylmethyl)-1,3,4-oxadiazole-5-thiol derivatives. Methods: Antibacterial activities of the compounds were evaluated using broth dilution method in 96 well plates. Enzyme inhibitory activities assays were ...

Synthesis of new derivatives of 1-(3-aminophenyl-4-benzoyl-5-phenyl-1H-pyrazole-3-carboxylic acid

Directory of Open Access Journals (Sweden)

RAHMI KASIMOGULLAR

2010-12-01

Full Text Available 1-(3-Aminophenyl-4-benzoyl-5-phenyl-1H-pyrazole-3-carboxylic acid (1 was synthesized according to the literature. 2-(3-Aminophenyl-2,6-dihydro-3,4-diphenyl-7H-pyrazolo[3,4-d]pyridazin-7-one (5 was obtained by the cyclocondensation reaction of 1 with hydrazine hydrate. New pyrazole derivatives of compounds 1 and 5 were synthesized by their reaction with β-diketones, β-ketoesters, β-naphthol, phenol and various other reagents. The structures of the synthesized compounds were characterized by 1H-NMR, 13C-NMR, IR and mass spectroscopy, as well as elemental analysis.

Synthesis, spectral and antimicrobial activity of [3-(4-chloro-phenoxy-2,4-diisopropyl-2,3,4,5-tetrahydro-1H-3l5-benzo[e][1,3,2]diazaphosphepin-3-ylidene]-alkyl-amine

Directory of Open Access Journals (Sweden)

R. Usha Nagalakshmi

2009-11-01

Full Text Available 3-(4-chlorophenoxy-2,4-diisopropyl-2,3,4,5-tetrahydro-1H-benzo[e][1,3,2]diaza-phosphepine was synthesized starting from 1,2-bis(bromomethylbenzene by reacting with 2 equimolar isopropyl amine, one equimolar PBr3 and then one equimolar 4-chlorophenol, respectively. The Staudinger reaction of the diazaphphosphine with a series of alkyl azides gave the corresponding iminophosphoranes. Antibacterial activities of the synthesized iminophosphoranes were screened

Cytotoxicity, genotoxicity, and mutagenicity of 1-chloro-2-hydroxy-3-butene and 1-chloro-3-buten-2-one, two alternative metabolites of 1,3-butadiene

Energy Technology Data Exchange (ETDEWEB)

Liu, Xin-Jie; Zeng, Fang-Mao; An, Jing; Yu, Ying-Xin [Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China); Zhang, Xin-Yu, E-mail: xyzhang999@shu.edu.cn [Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China); Elfarra, Adnan A., E-mail: elfarra@svm.vetmed.wisc.edu [Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706 (United States); Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI 53706 (United States)

2013-08-15

The cytotoxicity, genotoxicity, and mutagenicity of 1-chloro-2-hydroxy-3-butene (CHB), a known in vitro metabolite of the human carcinogen 1,3-butadiene, have not previously been investigated. Because CHB can be bioactivated by alcohol dehydrogenases to yield 1-chloro-3-buten-2-one (CBO), a bifunctional alkylating agent that caused globin-chain cross-links in erythrocytes, in the present study we investigated the cytotoxic and genotoxic potential of CHB and CBO in human normal hepatocyte L02 cells using the MTT assay, the relative cloning efficiency assay and the comet assay. We also investigated the mutagenic potential of these compounds with the Ames test using Salmonella strains TA1535 and TA1537. The results provide clear evidence for CHB and CBO being both cytotoxic and genotoxic with CBO being approximately 100-fold more potent than CHB. Interestingly, CHB generated both single-strand breaks and alkali-labile sites on DNA, whereas CBO produced only alkali-labile sites. CHB did not directly result in DNA breaks, whereas CBO was capable of directly generating breaks on DNA. Interestingly, both compounds did not induce DNA cross-links as examined by the comet assay. The Ames test results showed that CHB induced point mutation but not frameshift mutation, whereas the toxic effects of CBO made it difficult to reliably assess the mutagenic potential of CBO in the two strains. Collectively, the results suggest that CHB and CBO may play a role in the mutagenicity and carcinogenicity of 1,3-butadiene. - Highlights: • 1-Chloro-2-hydroxy-3-butene (CHB) is cytotoxic and genotoxic in human liver cells. • The CHB metabolite, 1-chloro-3-buten-2-one (CBO) is ∼ 100-fold more toxic than CHB. • CHB and CBO cause DNA alkali-labile sites, but only CBO directly causes DNA breaks. • CHB is mutagenic in the Ames test, but CBO is too toxic in the assay. • The results suggest a role for CHB in 1,3-butadiene genotoxicity and mutagenicity.

1-(3-Iodopropyl-4-methylquinolin-1-ium Iodide

Directory of Open Access Journals (Sweden)

Todor Deligeorgiev

2015-11-01

Full Text Available A solvent-free “one-pot” synthetic approach to 1-(3-iodopropyl-4-methylquinolin-1-ium iodide is reported in the present work. The title compound is derived from N-alkylation of 4-methylquinoline with 1,3-diiodopropane proceeded at room temperature. The target quinolinium salt is obtained in a highly pure form. It’s structure was evaluated by 1H-NMR, 13C-NMR, and DEPT135 spectra.

A short and facile synthesis of 2-(1Z)-(3-hydroxy-3,7-dimethylocta-1,6-dienyl)-1,4-benzenediol and 1-(3'-methoxypropanoyl)-2,4,5-trimethoxybenzene isolated from Cordia alliodora.

Science.gov (United States)

Kaur, Sukhbir; Singh, Vasundhara; Kumar, Gulshan; Kad, G L; Singh, Jasvinder

2010-03-01

A novel synthesis of 2-(1Z)-(3-hydroxy-3,7-dimethylocta-1,6-dienyl)-1,4-benzenediol and 1-(3'-methoxypropanoyl)-2,4,5-trimethoxybenzene has been carried out by making use of an easily available starting material, acceleration by MW irradiation and the use of water as a green solvent in the key steps.

A Hybrid CFHR3-1 Gene Causes Familial C3 Glomerulopathy.

LENUS (Irish Health Repository)

Malik, Talat H

2012-07-01

Controlled activation of the complement system, a key component of innate immunity, enables destruction of pathogens with minimal damage to host tissue. Complement factor H (CFH), which inhibits complement activation, and five CFH-related proteins (CFHR1-5) compose a family of structurally related molecules. Combined deletion of CFHR3 and CFHR1 is common and confers a protective effect in IgA nephropathy. Here, we report an autosomal dominant complement-mediated GN associated with abnormal increases in copy number across the CFHR3 and CFHR1 loci. In addition to normal copies of these genes, affected individuals carry a unique hybrid CFHR3-1 gene. In addition to identifying an association between these genetic observations and complement-mediated kidney disease, these results provide insight into the protective role of the combined deletion of CFHR3 and CFHR1 in IgA nephropathy.

Smad3 deficiency leads to mandibular condyle degradation via the sphingosine 1-phosphate (S1P)/S1P3 signaling axis.

Science.gov (United States)

Mori, Hiroki; Izawa, Takashi; Tanaka, Eiji

2015-10-01

Temporomandibular joint osteoarthritis is a degenerative disease that is characterized by permanent cartilage destruction. Transforming growth factor (TGF)-β is one of the most abundant cytokines in the bone matrix and is shown to regulate the migration of osteoprogenitor cells. It is hypothesized that TGF-β/Smad3 signaling affects cartilage homeostasis by influencing sphingosine 1-phosphate (S1P)/S1P receptor signaling and chondrocyte migration. We therefore investigated the molecular mechanisms by which crosstalk may occur between TGF-β/Smad3 and S1P/S1P receptor signaling to maintain condylar cartilage and to prevent temporomandibular joint osteoarthritis. Abnormalities in the condylar subchondral bone, including dynamic changes in bone mineral density and microstructure, were observed in Smad3(-/-) mice by microcomputed tomography. Cell-free regions and proteoglycan loss characterized the cartilage degradation present, and increased numbers of apoptotic chondrocytes and matrix metalloproteinase 13(+) chondrocytes were also detected. Furthermore, expression of S1P receptor 3 (S1P3), but not S1P1 or S1P2, was significantly down-regulated in the condylar cartilage of Smad3(-/-) mice. By using RNA interference technology and pharmacologic tools, S1P was found to transactivate Smad3 in an S1P3/TGF-β type II receptor-dependent manner, and S1P3 was found to be required for TGF-β-induced migration of chondrocyte cells and downstream signal transduction via Rac1, RhoA, and Cdc42. Taken together, these results indicate that the Smad3/S1P3 signaling pathway plays an important role in the pathogenesis of temporomandibular joint osteoarthritis. Copyright © 2015 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved.

Chemical-wet Synthesis and Electrochemistry of LiNi1/3Co1/3Mn1/3O2 Cathode Materials for Li-ion Batteries

International Nuclear Information System (INIS)

Hsieh, Chien-Te; Mo, Chung-Yu; Chen, Yu-Fu; Chung, Yi-Jou

2013-01-01

LiNi 1/3 Co 1/3 Mn 1/3 O 2 (LNCM) with a well-ordered layered structure, confirmed by X-ray diffraction, was synthesized by the chemical-wet synthesis incorporated with (i) a pulse microwave-assisted heating of LNCM precursors and (ii) a carbon coating technique. The microwave irradiation periods (i.e., 5–20 min) and amount of carbon additive (i.e., glucose content: 0.1–0.75%) served as key factors in modifying as-prepared LNCM powders. The electrochemical performance of as-prepared LNCM cathodes was well characterized by cyclic voltammetry and charge–discharge cycling at 0.1–5C. Both appropriate microwave heating and carbon coating significantly improve discharge capacity, rate capability, and cycling stability of LNCM cathodes. This improved performance can be attributed to the facts that an appropriate microwave heating of LNCM precursors induces low cation mixing of the layered lattices and the carbon coating enables the creation of outer circuit of charge-transfer pathway, preventing cathode corrosion from direct contact to the electrolyte. The C-coated LNCM cathode shows the increased capacity retention from 70.2 to 93.3% after 50 cycles at 1C. On the basis of the experimental results, both the microwave heating and the carbon coating provide a feasible potential way to improve the electrochemical performance of LNCM cathode, benefiting the development of Li-ion batteries

(E-Methyl 3-(3,4-dimethoxyphenyl-2-[(1,3-dioxoisoindolin-2-ylmethyl]acrylate

Directory of Open Access Journals (Sweden)

D. Kannan

2012-04-01

Full Text Available In the title compound, C21H19NO6, the isoindole ring system is essentially planar [maximum deviation = 0.019 (2 Å for the N atom] and is oriented at a dihedral angle of 51.3 (1° with respect to the benzene ring. The two methoxy groups are almost coplanar with the attached benzene ring [C—O—C—C = 3.7 (4 and 4.3 (4°]. The molecular conformation is stabilized by an intramolecular C—H...O hydrogen bond, which generates an S(9 ring motif. In the crystal, molecules are linked through bifurcated C—H...(O,O hydrogen bonds having R12(5 ring motifs, forming chains along the b-axis direction. The crystal packing is further stabilzed by π–π interactions [centriod–centroid distance = 3.463 (1 Å].

An X- and Q-band Fe3+ EPR study of nanoparticles of magnetic semiconductor Zn1-xFexO

Science.gov (United States)

Misra, Sushil K.; Andronenko, S. I.; Thurber, A.; Punnoose, A.; Nalepa, A.

2014-08-01

EPR studies on two types of nanoparticles of Fe3+ doped, 0.1-10%, ZnO, NL and QJ, prepared using similar chemical hydrolysis methods, in diethylene glycol, and in denatured ethanol solutions, respectively, were carried out at X-band (~9.5 GHz) at 77 K and at Q-band (~34.0 GHz) at 10, 80, and 295 K. To interpret the experimental results, EPR spectra were simulated by exact diagonalization of the spin-Hamiltonian matrix to identify the Fe ions at different magnetically active sites in these samples. The simulation for NL samples revealed that they contained (i) Fe3+ ions, which substituted for Zn ions, the zero-field splitting (ZFS) parameter which has a large distribution over the sample due to oxygen vacancies in the second coordination sphere; (ii) EPR signal from surface oxygen defects; and (iii) ferromagnetically (FM) coupled Fe ions with concentration of Fe more than 1%. The EPR spectra for QJ samples are very different from those for NL samples, exhibiting only rather intense FM EPR lines. The FM and EPR spectra in NL and/or QJ samples are found to vary strongly with differences in the surface morphology of nanoparticles.

HANSF 1.3.2 User's Manual

International Nuclear Information System (INIS)

DUNCAN, D.R.

1999-01-01

The HANSF analysis tool is an integrated model considering phenomena inside a multi-canister overpack (MCO) spent nuclear fuel container such as fuel oxidation, convective and radiative heat transfer, and the potential for fission product release. This manual reflects the HANSF version 1.3.2, a revised version of 1.3.1. HANSF 1.3.2 was written to correct minor errors and to allow modeling of condensate flow on the MCO inner surface. HANSF 1.3.2 is intended for use on personal computers such as IBM-compatible machines with Intel processors running under Lahey TI or digital Visual FORTRAN, Version 6.0, but this does not preclude operation in other environments

Fisetin induces Sirt1 expression while inhibiting early adipogenesis in 3T3-L1 cells.

Science.gov (United States)

Kim, Sang Chon; Kim, Yoo Hoon; Son, Sung Wook; Moon, Eun-Yi; Pyo, Suhkneung; Um, Sung Hee

2015-11-27

Fisetin (3,7,3',4'-tetrahydroxyflavone) is a naturally found flavonol in many fruits and vegetables and is known to have anti-aging, anti-cancer and anti-viral effects. However, the effects of fisetin on early adipocyte differentiation and the epigenetic regulator controlling adipogenic transcription factors remain unclear. Here, we show that fisetin inhibits lipid accumulation and suppresses the expression of PPARγ in 3T3-L1 cells. Fisetin suppressed early stages of preadipocyte differentiation, and induced expression of Sirt1. Depletion of Sirt1 abolished the inhibitory effects of fisetin on intracellular lipid accumulation and on PPARγ expression. Mechanistically, fisetin facilitated Sirt1-mediated deacetylation of PPARγ and FoxO1, and enhanced the association of Sirt1 with the PPARγ promoter, leading to suppression of PPARγ transcriptional activity, thereby repressing adipogenesis. Lowering Sirt1 levels reversed the effects of fisetin on deacetylation of PPARγ and increased PPARγ transactivation. Collectively, our results suggest the effects of fisetin in increasing Sirt1 expression and in epigenetic control of early adipogenesis. Copyright © 2015 Elsevier Inc. All rights reserved.

Crystal structures of 2,3-bis(4-chlorophenyl-1,3-thiazolidin-4-one and trans-2,3-bis(4-chlorophenyl-1,3-thiazolidin-4-one 1-oxide

Directory of Open Access Journals (Sweden)

Hemant P. Yennawar

2015-03-01

Full Text Available In the crystal structures of the title compounds, C15H11Cl2NOS, (1, and C15H11Cl2NO2S, (2, wherein (2 is the oxidized form of (1, the thiazolidine ring is attached to two chlorophenyl rings. The chlorophenyl ring on the 2-carbon atom position points in the same direction as that of the S atom in (1, while in (2, the S atom points in the opposite direction. The O atom on the chiral S atom in (2 is trans to the chlorophenyl ring on the 2-carbon. The chlorophenyl ring planes in each structure are close to orthogonal, making dihedral angles of 78.61 (6 and 87.46 (8° in (1 and (2, respectively. The thiazolidine ring has a twisted conformation on the S—Cmethine bond in (1, and an envelope conformation with the S atom 0.715 (3 Å out of the plane of other four atoms in (2. In the crystal of (1, molecules are linked by C—H...O hydrogen bonds, as well as by slipped parallel π–π interactions [inter-centroid distance = 3.840 (3 Å] between inversion-related phenyl rings, forming sheets parallel to (001. In the crystal of (2, molecules are linked via C—H...O and C—H...Cl hydrogen bonds, forming slabs parallel to (001.

Synthesis and fluorescence study of sodium-2-(4'-dimethyl-aminocinnamicacyl)-3,3-(1',3'-alkylenedithio) acrylate

International Nuclear Information System (INIS)

Si Zhenjun; Shao Yun; Li Chunxia; Liu Qun

2007-01-01

We synthesized two new compounds: Sodium 2-(4'-dimethyl-aminocinnamicacyl)-3,3-(1',3'- ethyl- enedithio) acrylate (STAA-1) and Sodium 2-(4'-dimethyl-aminocinnamicacyl)-3, 3-(1',3'-propylenedithio) acrylate (STAA-2). The maximum absorption of these compounds ranges from 460 to 520 nm with different molecular structures in different solvents. Meanwhile, the emission peak of these compounds arranges from yellow (510 nm) to red (605 nm). The emission spectra show red shift according to the strength of the hydrogen bonding property of the solvent. But the absorption spectra do not show clearly relationship with the strength of the hydrogen bonding property of the solvent. The Stoke shift of the compounds ranges from 42 to 102 nm. It changes in the following order, EtOH>H 2 O>DMF, and STAA-1>STAA-2 in the same solvent. The fluorescent quantum yield of STAA-1 was measured to be 7.12% with quinine sulphate as the standard compound in ethanol. Furthermore, the relationship of the fluorescence of STAA-1 with pH (ranges form 4 to 14) in water (c=∼10 -4 ) was studied to make sure that these compounds could be used as proton sensors

Synthesis, spectra, and the crystal structure of α-(3,3-dimethyl-3,4-dihydroisoquinolyl-1)-hydroxyiminoacetamide

International Nuclear Information System (INIS)

Sokol, V.I.; Davydov, V.V.; Kartashova, I.V.; Zaitsev, B.E.; Shklyaev, Yu.V.; Ryabov, M.A.; Sergienko, V.S.

1996-01-01

α-(3,3-Dimethyl-3,4-dihydroisoquinolyl-1)-hydroxyiminoacetamide (I) was synthesized, and its x-ray structure analysis was performed (Enraf-Nonius CAD-4 diffractometer; MoKα radiation; graphite monochromator; θ/2θ scan; 2θmax=56 deg. ; 2496 reflections with I≥2σ(I); and R=0.038). Crystals of I are monoclinic; a=11.67(1), b=8.365(3), and c=15.22(2) A; β=107.7(1) deg.; V=1415.2(2) A 3; ρ(calc)=1.236 g/cm3; Z=4; and sp. gr. P21/n. I crystallizes as a monohydrate, and its formula is C13H15N3O2·H2O. In a crystal, I exists in a azomethineoxime tautomeric form. The planes of amideoxime and dihydroisoquinoline moieties are nearly orthogonal to each other. According to IR and electronic spectra, when passing from crystal to solution the conformation of I changes only slightly. An effect of water molecules on the molecular structure of I is discussed

26 CFR 1.381(c)(3)-1 - Capital loss carryovers.

Science.gov (United States)

2010-04-01

... 26 Internal Revenue 4 2010-04-01 2010-04-01 false Capital loss carryovers. 1.381(c)(3)-1 Section 1.381(c)(3)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Insolvency Reorganizations § 1.381(c)(3)-1 Capital loss carryovers. (a...

Fatigue properties of piezoelectric-electrostrictive Pb(Mg1/3,Nb2/3)O3-PbTiO3 monolithic bilayer composites

Science.gov (United States)

Hall, A.; Akdogan, E. K.; Safari, A.

2006-11-01

The fatigue response of monolithic piezoelectric 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3-electrostrictive 0.90Pb(Mg1/3Nb2/3)O3-0.10PbTiO3 bilayer composites was investigated experimentally. The monomorph bilayers were cosintered at 1150°C, and the polarization hysteresis, relative permittivity, displacement, and cyclic fatigue (107cycles) were measured as a function of piezoelectric-electrostrictive volume fraction (PEVF) ratio. The highest tip displacement of bilayers was found in the 3:1 PEVF monolith, reaching 40μm at 5kV/cm applied field strength. By minimizing the electrostrictive layer thickness, tip displacement substantially increased, while maintaining a lower hysteresis than the purely piezoelectric counterpart. Fatigue measurements indicated a 31% decrease in displacement after 107cycles in 3:1 monoliths, whereas the 1:3 PEVF only showed a 12% decrease under the same conditions. There is a 30% increase in polarization after 107cycles for 1:1 PEVF bilayers, which is attributed to self-poling due to a diffuse transition layer in the vicinity of the interface. It was found that partial 90° domain switching occurred prior to poling because of the residual stresses in the composite, imposed by the electrostrictive layer and the spontaneous strain associated with the cubic-tetragonal transition in the ferroelectric layer. The results indicate that the electrostrictive layer, which is electrically in series with the piezoelectric one, enhances the fatigue resistance of the monolithic bilayer composites in addition to the increase in tip displacement.

Observation of divergent La{sup 3+} ion dilute effect in two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RE{sub x}La{sub 1−x}–EBTC (RE{sup 3+}=Eu{sup 3+} or Tb{sup 3+}; EBTC{sup 4−}=1,1′-ethynebenzene-3,3′,5,5′-etracarboxylate)

Energy Technology Data Exchange (ETDEWEB)

Zhai, Lu [State Key Laboratory of Materials-Oriented Chemical Engineering and College of Science, Nanjing Tech University, Nanjing 210009 (China); State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China); Zhang, Wen-Wei, E-mail: wwzhang@nju.edu.cn [State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China); Ren, Xiao-Ming, E-mail: xmren@njtech.edu.cn [State Key Laboratory of Materials-Oriented Chemical Engineering and College of Science, Nanjing Tech University, Nanjing 210009 (China); Zuo, Jing-Lin [State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (China)

2015-10-15

The lanthanide metal-organic frameworks (MOFs) [Ln{sub 2}(EBTC){sub 1.5}(CH{sub 3}OH){sub 4}]·6H{sub 2}O are isostructural to each other, where EBTC{sup 4−}=1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate; Ln{sup 3+}=La{sup 3+}, Eu{sup 3+} and Tb{sup 3+}; and the corresponding MOF is abbreviated as Ln–EBTC. MOFs Eu–EBTC and Tb–EBTC emit intense red and green luminescence (visible by bare eyes), respectively. The molecular alloys of Eu{sub x}La{sub 1−x}–EBTC and Tb{sub x}La{sub 1−x}–EBTC have been successfully prepared by mixing Eu{sup 3+}/Tb{sup 3+} and La{sup 3+} salts with the desired molar ratio in the starting material. Two series of Eu{sub x}La{sub 1−x}–EBTC and Tb{sub x}La{sub 1−x}–EBTC molecular alloys are isomorphic to the parent Ln–EBTC MOFs, while exhibit divergent La{sup 3+} ion diluting effect, namely, with increasing the relative amount of La{sup 3+}, the intensity of characteristic emission arising from Tb{sup 3+} ion monotonely increases in Tb{sub x}La{sub 1−x}–EBTC molecular alloys, whereas that of Eu{sup 3+} ion shows non-monotone decrease in Eu{sub x}La{sub 1−x}–EBTC molecular alloys. The possible origin is discussed for such a divergent behavior between Eu{sub x}La{sub 1−x}–EBTC and Tb{sub x}La{sub 1−x}–EBTC molecular alloys. - Graphical abstract: Two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RE{sub x}La{sub 1−x}–EBTC (RE{sup 3+}=Eu{sup 3+} or Tb{sup 3+}; EBTC{sup 4−}=1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate) have been successfully prepared by mixing Eu{sup 3+}/Tb{sup 3+} and La{sup 3+} salts with the desired molar ratio in the starting material and showed photoluminescence property with divergent La{sup 3+} ion dilute effect. - Highlights: • 3-D molecular alloys of Eu{sub x}La{sub 1−x}–EBTC and Tb{sub x}La{sub 1−x}–EBTC were prepared. • They are isomorphic to the parent Ln–EBTC MOFs. • They show photoluminescence property with divergent La

Synthesis and Molecular Structures of Two [1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene]-dichloro-Zn(II) Coordination Polymers

OpenAIRE

Lee, Gene-Hsiang; Wang, Hsin-Ta

2006-01-01

Two novel coordination polymers with 3D metal-organic frameworks (MOFs) have been synthesized by reacting 1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene (L) with zinc dichloride. Both compounds have the same repeating unit consisting of a distorted tetrahedral Zn(II) center coordinated by two chlorides and two pyridyl nitrogen atoms of two bridging bismonodentate L ligands, however, different structural conformations have been found, one forming a helical chain and the other producing a square-wa...

Preparation data of the bromodomains BRD3(1, BRD3(2, BRD4(1, and BRPF1B and crystallization of BRD4(1-inhibitor complexes

Directory of Open Access Journals (Sweden)

Martin Hügle

2016-06-01

Full Text Available This article presents detailed purification procedures for the bromodomains BRD3(1, BRD3(2, BRD4(1, and BRPF1B. In addition we provide crystallization protocols for apo BRD4(1 and BRD4(1 in complex with numerous inhibitors. The protocols described here were successfully applied to obtain affinity data by isothermal titration calorimetry (ITC and by differential scanning fluorimetry (DSF as well as structural characterizations of BRD4(1 inhibitor complexes (PDB codes: PDB: 4LYI, PDB: 4LZS, PDB: 4LYW, PDB: 4LZR, PDB: 4LYS, PDB: 5D24, PDB: 5D25, PDB: 5D26, PDB: 5D3H, PDB: 5D3J, PDB: 5D3L, PDB: 5D3N, PDB: 5D3P, PDB: 5D3R, PDB: 5D3S, PDB: 5D3T. These data have been reported previously and are discussed in more detail elsewhere [1,2].

Novel Synthesis of 1,2,3-Triazoles via 1,3-Dipolar Cycloadditions of Alkynes to Azides in Ionic Liquid