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排序方式: 共有146条查询结果,搜索用时 15 毫秒
91.
92.
Condori J. Maghareh A. Orr J. Li H.-W. Montoya H. Dyke S. Gill C. Prakash A. 《Experimental Techniques》2020,44(6):735-749
Experimental Techniques - Control is a critical element in many applications and research such as experimental testing in real-time. Linear approaches for control and estimation have been widely... 相似文献
93.
Reichert D Montoya A Liang X Bockhorn H Haynes BS 《The journal of physical chemistry. A》2010,114(46):12323-12329
Molecular modeling is used to determine low-energy conformational structures and thermodynamic properties of levulinic acid in the gas phase. Structure and IR vibrational frequencies are obtained using density functional and M?ller-Plesset perturbation theories. Electronic energies are computed using G3//B3LYP and CBS-QB3 model chemistries. Computed anharmonic frequencies are consistent with reported experimental data. Population analysis shows a boat- and a chainlike structure to be most abundant at 298 K, with increasing proportions of two other conformers at higher temperatures. Population mean distribution values for thermodynamic quantities are derived. At 298 K and 1 atm, the enthalpy of formation, entropy, and heat capacity are -613.1 ± 1.0 kJ·mol(-1), 407.4 J·mol(-1)·K(-1), and 132.3 J·mol(-1)·K(-1), respectively. 相似文献
94.
Hydrogen sulfide (H(2)S) is an important biological messenger but few biologically-compatible methods are available for its detection. Here we report two bright fluorescent probes that are selective for H(2)S over cysteine, glutathione and other reactive sulfur, nitrogen, and oxygen species. Both probes are demonstrated to detect H(2)S in live cells. 相似文献
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Heinrich B Burrowes C Montoya E Kardasz B Girt E Song YY Sun Y Wu M 《Physical review letters》2011,107(6):066604
Spin injection across the ferrimagnetic insulator (YIG)/normal metal (Au) interface was studied by ferromagnetic resonance. The spin mixing conductance was determined by comparing the Gilbert damping in bare YIG films with those covered by a Au/Fe/Au structure. The Fe layer in Au/Fe/Au acted as a spin sink as displayed by an increased Gilbert damping parameter α compared to that in the bare YIG. In particular, for the 9.0 nm YIG/2.0 nm Au/4.3 nm Fe/6.1 nm Au structure, the YIG and Fe films were coupled by an interlayer exchange coupling, and the exchange coupled YIG exhibited an increased Gilbert damping compared to the bare YIG. This relationship between static and dynamic coupling provides direct evidence for spin pumping. The transfer of spin momentum across the YIG interface is surprisingly efficient with the spin mixing conductance g(↑↓) ? 1.2 × 10(14) cm(-2). 相似文献
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On-line determination of 3,5,6-trichloro-2-pyridinol in human urine samples by surface plasmon resonance immunosensing 总被引:1,自引:0,他引:1
Mauriz E Calle A Manclús JJ Montoya A Lechuga LM 《Analytical and bioanalytical chemistry》2007,387(8):2757-2765
An immunochemical method for the analysis of 3,5,6-trichloro-2-pyridinol (TCP), a major urinary metabolite of chlorpyrifos,
is developed using a surface plasmon resonance (SPR)-based biosensor. The stability of the assay was assessed by covalently
linking the analyte derivative to a thin, gold-modified sensor surface. For optimization of analyte derivative immobilization,
sensor chips were activated via alkanethiol monolayers with terminal amine or carboxyl groups. Binding inhibition tests were
performed in untreated urine samples and compared to those obtained in distilled water and PBS was used as control. In all
cases, similar detection limits, at the micrograms per litre level (0.1–0.24 μg L−1), were attained for TCP assays independently of the dilution buffer. Reproducibility of measurements was studied throughout
more than 130 regeneration cycles, which allowed the repeated use of the same immunosensor surface without significant variation
of the SPR signal. All measurements were developed in real-time in only 10 min, using a SPR portable system. The device could
be applied as a valuable analytical method to both environmental screening and clinic diagnostics. 相似文献
100.
Noemí Montoya Pablo Pardo Antonio Doménech-Carbó Javier Alarcón 《Journal of Sol-Gel Science and Technology》2014,69(1):137-147
Cubic, tetragonal and monoclinic Gd-doped zirconia nanoparticles with nominal composition GdxZr1?xO2 in the range 0 ≤ x ≤ 0.2, were prepared by annealing dried gels of Gd-containing zirconia at temperatures over the range between 450 and 1,300 °C. The synthesized zirconia-based nanoparticles with increased gadolinium load were characterized by X-ray powder diffraction, infrared and Raman spectroscopies, and transmission electron microscopy. The stabilization of the crystalline forms of Gd-doped ZrO2 solid solutions depends on the amount of Gd dopant and the annealing temperature. For low Gd loads in GdxZr1?xO2 being x < 0.05, the tetragonal form is the single phase up to 1,100 °C, whereas the monoclinic is the crystalline form detected up to 1,300 °C. Within the range of compositions 0.05 ≤ x < 0.1, is the tetragonal the only stabilized zirconia crystalline structure over the whole range of temperature up to 1,300 °C. For higher Gd-contents, in the range 0.1 ≤ x ≤ 0.2, is the cubic zirconia form the only stable phase for the whole range of annealing temperatures. Solid-state electrochemistry of the gadolinium-doped zirconia performed by the voltammetry of microparticles approach allowed distinguishing different electrochemical answers of Gd cation associated with slightly different local coordination surrounding of cations. Enantioselective electrocatalytic effect of monoclinic Gd-doped ZrO2 on the oxidation of l-(+)-tartaric acid and d-(?)-tartaric was also studied. 相似文献