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81.
Defective limbic system in mice lacking the tailless gene 总被引:1,自引:0,他引:1
AP Monaghan D Bock P Gass A Schw?ger DP Wolfer HP Lipp G Schütz 《Canadian Metallurgical Quarterly》1997,390(6659):515-517
82.
B. J. Monaghan R. J. Pomfret K. S. Coley 《Metallurgical and Materials Transactions B》1998,29(1):111-118
The kinetics of dephosphorization of carbon-saturated iron by oxidizing slags were studied at 1330 °C. Nine slag compositions
were investigated in the systems CaO-Fe2O3-SiO2-CaF2 and CaO-Fe2O3-SiO2-CaCl2. Increasing Fe2O3 up to 50 pct was found to increase the rate and extent of dephosphorization, whereas further increases were found to decrease
the rate and extent of dephosphorization. This was explained in terms of two competing effects on the driving force, where
increased levels of iron oxide increase the oxygen potential for dephosphorization, hence the driving force, but simultaneously
dilute the basic components in the slag, lowering the driving force for dephosphorization. CaF2 and CaCl2 were found to decrease the rate and extent of dephosphorization at levels higher than 12 pct. The rate of dephosphorization
was found to be first order with respect to phosphorous in the metal and was controlled by mass transport in the slag. The
oxygen potential at the slag/metal interface was controlled by the FeO activity in the slag. When the kinetic results were
analyzed to take account of different driving forces, Fe2O3, CaF2 and CaCl2 were all found to increase the mass transfer coefficient of phosphorous in the slag, and a quantitative relationship has
been demonstrated between these mass transfer coefficients and the slag viscosity for each system studied. 相似文献
83.
84.
Li D Brantley WA Mitchell JC Daehn GS Monaghan P Papazoglou E 《Journal of materials science. Materials in medicine》2002,13(4):361-367
The fatigue limits and fracture characteristics for a Pd–Cu–Ga alloy and a Pd–Ga alloy were studied. The alloys were cast into tensile test bars with gauge diameter of 3 mm and gauge length of 15 mm, and the surfaces of the castings were neither air-abraded nor polished after removal from the investment. Specimens were prepared from all-new metal (not previously melted), a combination of 50% new metal and 50% old metal (previously melted one time) and 100% old metal. The cast bars were subjected to heat treatment simulating the complete firing cycles for dental porcelain, and fatigued in air at room temperature under uniaxial tension-compression stress at 10 Hz and a ratio of tensile stress amplitude to compressive stress amplitude (R-ratio) of –1. The alloy microstructures and fracture surfaces were examined with a scanning electron microscope (SEM). Results showed that the fatigue limits at 2 x 106cycles of the Pd–Cu–Ga and Pd–Ga alloys were approximately 0.20 and 0.15 of their 0.1% yield strength (YS) in tension, respectively. The fatigue resistance for specimens from both alloys containing 50% old metal and 50% new metal was comparable to that of specimens containing all-new metal, although this decreased dramatically for Pd–Cu–Ga alloy specimens containing all-old metal. The fatigue resistance of the Pd–Cu–Ga alloy subjected to heat treatment simulating the porcelain firing cycles was not adversely affected by remnants of the original as-cast dendritic microstructure that remained in the relatively large test specimens. A longer heat treatment than recommended by the manufacturer for the porcelain firing cycles is needed to completely eliminate the as-cast dendritic structure in these specimens. The Pd–Cu–Ga alloy exhibited superior fatigue resistance to the Pd–Ga alloy, which has an equiaxed-grain microstructure and lower yield strength. 相似文献
85.
Monaghan PB McCarney KM Ricketts A Littleford RE Docherty F Smith WE Graham D Cooper JM 《Analytical chemistry》2007,79(7):2844-2849
There is a continued interest in the development of new on-chip protocols for the determination of the causes of infectious disease. In this paper, we demonstrate the use of surface-enhanced resonance Raman scattering (SERRS) for detecting the clinically relevant nucleic acid sequences of Chlamydia trachomatis in a bead-based lab-on-a-chip format, incorporating a solid-phase sample clean-up on-chip. The assay uses streptavidinated polymer microspheres to capture a biotinylated PCR product of the oligonucleotide sequence, which was subsequently hybridized against a complementary rhodamine-labeled, Raman active probe. Central to the assay is an in-channel integrated microfilter, which was used to retain the microspheres, enabling the bound target to be separated from the rest of the sample as part of a solid-phase clean-up (thereby removing any contributions from the background). After washing, the bound Rhodamine labeled detection probe was released thermally from the microspheres by heating and was subsequently mixed on-chip with a stream of silver nanoparticles. The signal was detected downstream using a Raman spectrometer to collect the SERRS response. The assay offers several advantages over traditional laboratory methods, including: the speed of the assay on-chip, the potential for sample clean-up; and the low volume of sample required. 相似文献
86.
B. J. Monaghan 《International Journal of Thermophysics》1999,20(2):677-690
A four-probe dc technique for measuring liquid-metal electrical resistivities has been developed, and liquid-resistivity measurements on gallium, tin, lead, copper, a lead tin alloy, a copper tin alloy, and a zinc alloy have been presented. The Lorenz relation has been used to calculate thermal conductivities from these resistivity measurements. The thermal conductivities calculated from these resistivity measurements are (where data are available) in good agreement with recommended liquid-metal thermal conductivities. 相似文献
87.
88.
More ‘crop per drop’: constraints and opportunities for precision irrigation in European agriculture
James M Monaghan Andre Daccache Laura H Vickers Tim M Hess E Keith Weatherhead Ivan G Grove Jerry W Knox 《Journal of the science of food and agriculture》2013,93(5):977-980
Dwindling water supplies, increasing drought frequency and uncertainties associated with a changing climate mean Europe's irrigated agriculture sector needs to improve water efficiency and produce more 'crop per drop'. This paper summarizes the drivers for change, and the constraints and opportunities for improving agricultural water management through uptake of precision irrigation technologies. A multi‐disciplinary and integrated approach involving irrigation engineers, soil scientists, agronomists and plant physiologists will be needed if the potential for precision irrigation within the field crop sector is to be realized. © 2013 Society of Chemical Industry 相似文献
89.
The security of the encryption and verification techniques with significant output images is examined by a known-plaintext attack. We introduce an iterative phase-retrieval algorithm based on multiple intensity measurements to heuristically estimate the phase key in the Fourier domain by several plaintext-cyphertext pairs. We obtain correlation output images with very low error by correlating the estimated key with corresponding random phase masks. Our studies show that the convergence behavior of this algorithm sensitively depends on the starting point. We also demonstrate that this algorithm can be used to attack the double random phase encoding technique. 相似文献
90.
Zhang Ao Monaghan Brian J. Longbottom Raymond J. Nusheh Mohammad Bumby Chris W. 《Metallurgical and Materials Transactions B》2020,51(2):492-504
Metallurgical and Materials Transactions B - Direct reduction of iron ore pellets using hydrogen gas has the potential to significantly reduce CO2 emissions from the ironmaking process. In this... 相似文献