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91.
Zach Evenson Tobias Schmitt Mathias Nicola Isabella Gallino Ralf Busch 《Acta Materialia》2012,60(12):4712-4719
The molten viscous behavior of Vitreloy 106, 106a, 105 and 101 bulk metallic glass-forming alloys was investigated at temperatures above Tliq. Couette concentric cylinder viscometry was used to determine the isothermal and continuous cooling melt viscosities. Isothermal three point beam bending measurements of the viscosity in the vicinity of Tg revealed a kinetically stronger liquid at low temperatures than at high temperatures, near Tliq. This behavior is revealed to be the result of a fragile to strong transition in the undercooled liquid, possibly due to polyamorphism. 相似文献
92.
Fernanda Andreola Luisa Barbieri Federica Bondioli Isabella Lancellotti Paola Miselli Anna Maria Ferrari 《International Journal of Applied Ceramic Technology》2010,7(6):909-917
The cleaned cathode ray tube (CRT) glass comes from the dismantling plant of TV and PC color kinescopes and has been used to completely replace both feldspathic and inert components of a traditional ceramic body. Panel glass has been added (up to 20 wt%) to a mixture of two commercial ball clays in order to obtain laboratory tiles sintered at 1210°C. Densification has been studied according to ISO rules, while sinterability has been estimated by optical dilatometry. The samples obtained showed main properties similar to commercial ceramic floor and/or wall tiles. 相似文献
93.
The Dirac-like electronic structure of graphene originates from the equivalence of the two basis atoms in the honeycomb lattice. We show that the characteristic parameters of the initial state wave function (sublattice symmetry and isospin) can be determined using angle-resolved photoemission spectroscopy (ARPES) with circularly polarized synchrotron radiation. At a photon energy of hν = 52 eV, transition matrix element effects can be neglected allowing us to determine sublattice symmetry and isospin with high accuracy using a simple theoretical model. 相似文献
94.
Isabella Nova Luca Lietti Pio Forzatti Francesca Frola Federica Prinetto Giovanna Ghiotti 《Topics in Catalysis》2009,52(13-20):1757-1761
The reduction by CO of NO x species stored over Pt–Ba/Al2O3 Lean NO x Trap systems is analysed in this work. The reaction mechanisms and pathways leading to N2 formation both under dry and wet conditions are investigated by complementary transient dynamic experiments and FTIR analyses. 相似文献
95.
Antonio Grossale Isabella Nova Enrico Tronconi Daniel Chatterjee Michel Weibel 《Topics in Catalysis》2009,52(13-20):1837-1841
The activity and the mechanism of the main reactions in the NO/NO2–NH3 SCR reacting system were comparatively investigated over a Fe- and a Cu-promoted commercial zeolite catalyst for the aftertreatment of Diesel exhausts. A dynamic micro-kinetic model in close agreement with all the details of the SCR catalytic chemistry was also developed. 相似文献
96.
Orlistat is a lipase inhibitor that is applied for treating obesity. Lipases are required for digestion and absorption of
dietary lipids and fat-soluble vitamins and carotenoids. The aim of this study was to compare the effects of orlistat therapy
on plasma concentrations of oxygenated (β-cryptoxanthin, lutein/zeaxanthin) and hydrocarbon (α-, β-carotene, lycopene) carotenoids.
Six patients with a body mass index (BMI)≥30 kg/m2 received 360 mg/d orlistat over 4.5 mon. Plasma carotenoid concentrations were determined at baseline (T
0) and after 3 (T
3) and 4.5 mon (T
4.5) along with anthropometric, dietary, and biochemical indices, including plasma lipids, retinol, α- and γ-tocopherols, and
FA. Baseline BMI was 32.7±1.97 kg/m2. Five of six patients lost weight; the average weight loss was 3.6±2.4% (P=0.47). There were no significant changes in dietary carotenoid intakes. In contrast, plasma α-and β-carotene concentrations
decreased significantly from T
0 to T
4.5 by 45% (P=0.006) and 32% (P=0.013), respectively. Plasma lycopene decreased from T
0 to T
3 but increased again from T
3 to T
4.5, while β-cryptoxanthin and lutein/zeaxanthin concentrations did not change. There were no significant alterations in tocopherol,
retinol, and FA concentrations. In conclusion, even though weight loss was not significant, orlistat therapy was associated
with significant decreases in plasma concentrations of the highly lipophilic hydrocarbon carotenoids, α- and β-carotene. 相似文献
97.
98.
99.
Bianco Isabella Panepinto Deborah Blengini Gian Andrea Onofrio Maurizio Zanetti Mariachiara 《Clean Technologies and Environmental Policy》2020,22(1):247-258
Clean Technologies and Environmental Policy - In the current context of the European Environmental legislation and standards, the automotive sector is expected to continuously improve the vehicles... 相似文献
100.
C. Isabella Bovolo Simon J. Abele James C. Bathurst David Caballero Marek Ciglan George Eftichidis Branislav Simo 《Computers & Geosciences》2009,35(5):924-945
Within the European Commission-funded MEDIGRID project, Grid computing technology is used to integrate various natural hazard models and data sets, maintained independently at different centres in Europe, into a single system, accessible to users over the internet. Each centre forms a process (application) or data storage node and has been fitted with the Globus toolkit, which provides the distributed computing environment functionality that is required for the system set up. In addition, several Grid data management components were developed to allow the system to operate on different computing platforms. Access to the data and application management services is enabled through a Grid Portal. A series of portlets enable users to access the system, providing a personalised interface to the Grid. Integration of the individual models required them to be modified as web services, so as to be run remotely over the internet. As the models have different data characteristics, a common data format was adopted for creating harmonised data sets and allowing the exchange of data between the models. As an example, the Fire Spread Engine model is used to derive a map of areas that have been burnt by fire. This forms an input to the SHETRAN hydrology, soil erosion and landslide model, which in turn could provide data for other models such as vegetation regeneration. The use of the system is demonstrated for a site in south-west Spain where a large forest fire occurred on 2 August 2003. The MEDIGRID system marks an advance in the integration of independently constructed models to provide improved hazard assessment technology. 相似文献