排序方式: 共有29条查询结果,搜索用时 15 毫秒
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Leal-Ramos MY Alarcon-Rojo AD Mason TJ Paniwnyk L Alarjah M 《Journal of the science of food and agriculture》2011,91(1):130-133
BACKGROUND: Halal foods are often perceived as wholesome products that are specially selected and processed to achieve the highest standards of quality. In this study, dye penetration from an aqueous solution of methylene blue (1 mol L?1) was used as a model for the marination process of Halal and non‐Halal chicken breast. RESULTS: The effect of dye penetration was evaluated by three techniques: (1) the mass of methylene blue solution in the samples was quantified by mass gain, (2) the amount of dye absorbed was determined by spectroscopy and (3) the penetration distance of dye inside the samples was measured. For non‐Halal meat, ultrasound increased the amount of dye inside the samples by 6 and 13% after 15 and 30 min respectively. The effect on Halal meat was much more pronounced, with an increase in dye uptake of over 60% being observed for both time periods. CONCLUSION: Dye penetration is an indication of meat permeability and so can be used as an estimate of marinading of meat. Thus the use of high‐power ultrasound has potential in poultry‐processing methods, in particular that of Halal chicken marination. Copyright © 2010 Society of Chemical Industry 相似文献
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Ramesh Pratibha Nalini Larysa Khomenkova Olivier Debieu Julien Cardin Christian Dufour Marzia Carrada Fabrice Gourbilleau 《Nanoscale research letters》2012,7(1):124
Microstructural, electrical, and optical properties of undoped and Nd3+-doped SiO
x
/SiN
y
multilayers fabricated by reactive radio frequency magnetron co-sputtering have been investigated with regard to thermal
treatment. This letter demonstrates the advantages of using SiN
y
as the alternating sublayer instead of SiO2. A high density of silicon nanoclusters of the order 1019 nc/cm3 is achieved in the SiO
x
sublayers. Enhanced conductivity, emission, and absorption are attained at low thermal budget, which are promising for photovoltaic
applications. Furthermore, the enhancement of Nd3+ emission in these multilayers in comparison with the SiO
x
/SiO2 counterparts offers promising future photonic applications. 相似文献
24.
Microswimmers: Confined Catalytic Janus Swimmers in a Crowded Channel: Geometry‐Driven Rectification Transients and Directional Locking (Small 42/2016)
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Ibarlucea Bergoi Fawzul Akbar Teuku Kim Kihyun Rim Taiuk Baek Chang-Ki Ascoli Alon Tetzlaff Ronald Baraban Larysa Cuniberti Gianaurelio 《Nano Research》2018,11(2):1057-1068
Nano Research - We demonstrate the direct biosensing of the Ebola VP40 matrix protein, using a memristor mode of a liquid-integrated nanodevice, based on a large array of honeycomb-shaped silicon... 相似文献
26.
Felix M. Zörgiebel Sebastian Pregl Lotta Römhildt Jörg Opitz W. Weber T. Mikolajick Larysa Baraban Gianaurelio Cuniberti 《Nano Research》2014,7(2):263-271
We demonstrate a pH sensor based on ultrasensitive nanosize Schottky junctions formed within bottom-up grown dopant-flee arrays of assembled silicon nanowires. A new measurement concept relying on a continuous gate sweep is presented, which allows the straightforward determination of the point of maximum sensitivity of the device and allows sensing experiments to be performed in the optimum regime. Integration of devices into a portable fluidic system and an electrode isolation strategy affords a stable environment and enables long time robust FET sensing measurements in a liquid environment to be carried out. Investigations of the physical and chemical sensitivity of our devices at different pH values and a comparison with theoretical limits are also discussed. We believe that such a combination of nanofabrication and engineering advances makes this Schottky barrier-powered silicon nanowire lab-on-a-chip platform suitable for efficient biodetection and even for more complex biochemical analysis. 相似文献
27.
YongTao An Christophe Labbé Larysa Khomenkova Magali Morales Xavier Portier Fabrice Gourbilleau 《Nanoscale research letters》2013,8(1):43
In this study, we report on the evolution of the microstructure and photoluminescence properties of Pr3+-doped hafnium silicate thin films as a function of annealing temperature (TA). The composition and microstructure of the films were characterized by means of Rutherford backscattering spectrometry, spectroscopic ellipsometry, Fourier transform infrared absorption, and X-ray diffraction, while the emission properties have been studied by means of photoluminescence (PL) and PL excitation (PLE) spectroscopies. It was observed that a post-annealing treatment favors the phase separation in hafnium silicate matrix being more evident at 950°C. The HfO2 phase demonstrates a pronounced crystallization in tetragonal phase upon 950°C annealing. Pr3+ emission appeared at TA = 950°C, and the highest efficiency of Pr3+ ion emission was detected upon a thermal treatment at 1,000°C. Analysis of the PLE spectra reveals an efficient energy transfer from matrix defects towards Pr3+ ions. It is considered that oxygen vacancies act as effective Pr3+ sensitizer. Finally, a PL study of undoped HfO2 and HfSiOx matrices is performed to evidence the energy transfer. 相似文献
28.
Linlu Mei Alexander A. Kokhanovsky Wolfgang von Hoyningen-Huene Larysa Istomina Gerrit de Leeuw 《International journal of remote sensing》2013,34(14):5030-5041
Aerosol observations over the Arctic are important because of the effects of aerosols on Arctic climate, such as their direct and indirect effects on the Earth's radiation balance and on snow albedo. Although information on aerosol properties is available from ground-based measurements, passive remote sensing using satellite measurements would offer the advantage of large spatial coverage with good temporal resolution, even though, due to light limitations, this is only available during the Arctic summer. However, aerosol optical depth (AOD) retrieval over the Arctic region is a great challenge due to the high reflectance of snow and ice and due to the high solar zenith angle. In this article, we describe a retrieval algorithm using Advanced Along-Track Scanning Radiometer (AATSR) data, a radiometer flying on the European Space Agency (ESA) Environmental Satellite (ENVISAT), which offers two views (near nadir and at 55° forward) at seven wavelengths in the visible thermal-infrared (VIS-TIR). The main idea of the Dual-View Multi-Spectral (DVMS) approach is to use the dual view to separate contributions to reflectance measured at the top of the atmosphere (TOA) due to atmospheric aerosol and the underlying surface. The algorithm uses an analytical snow bidirectional reflectance distribution function (BRDF) model for the estimation of the ratio of snow reflectances in the nadir and forward views, as well as an estimate of the atmospheric contribution to TOA reflectance obtained using the dark pixel method over the adjacent ocean surface, assuming that this value applies over nearby land surfaces in the absence of significant sources across the coastline. An iteration involving all four AATSR wavebands in the visible near-infrared (VIS-NIR) is used to retrieve the relevant information. The method is illustrated for AATSR overpasses over Greenland with clear sky in April 2009. Comparison of the retrieved AOD with AErosol Robotic Network (AERONET) data shows a correlation coefficient of 0.75. The AODs retrieved from AATSR using the DVMS approach and those obtained from AERONET data show similar temporal trends, but the AERONET results are more variable and the highest AOD values are mostly missed by the DVMS approach. Limitations of the DVMS method are discussed. The pure-snow BRDF model needs further correction in order to obtain a better estimation for mixtures of snow and ice. 相似文献
29.
Pure and Si-rich HfO2 layers fabricated by radio frequency sputtering were utilized as alternative tunnel oxide layers for high-k/Si-nanocrystals-SiO2/SiO2 memory structures. The effect of Si incorporation on the properties of Hf-based tunnel layer was investigated. The Si-rich
SiO2 active layers were used as charge storage layers, and their properties were studied versus deposition conditions and annealing
treatment. The capacitance-voltage measurements were performed to study the charge trapping characteristics of these structures.
It was shown that with specific deposition conditions and annealing treatment, a large memory window of about 6.8 V is achievable
at a sweeping voltage of ± 6 V, indicating the utility of these stack structures for low-operating-voltage nonvolatile memory
devices. 相似文献