National Technical University of Athens

About: National Technical University of Athens is a education organization based out in Athens, Attiki, Greece. It is known for research contribution in the topics: Large Hadron Collider & Nonlinear system. The organization has 13445 authors who have published 31259 publications receiving 723504 citations. The organization is also known as: Athens Polytechnic & NTUA.

Effect of extraction parameters on the carotenoid recovery from tomato waste

Abstract: Tomato waste is an important source of natural carotenoids This study was carried out to assess the extractability of tomato waste carotenoids in different organic solvents and to optimise the extraction parameters (type of solvent, extraction time, temperature and extraction steps) for maximum yield Among other solvents, we tested a new environmentally friendly one, ethyl lactate, which gave the highest carotenoid yield (24300 mg kg -1 dry tomato waste) at 70 °C, compared to acetone (5190 mg kg -1 ), ethyl acetate (4621 mg kg -1 ), hexane (3445 mg kg -1 ) and ethanol (1757 mg kg -1 ) The carotenoid recovery was significantly (P < 005) affected by the number of extraction steps and temperature in all solvents Mathematic equations predicted rather satisfactorily (R 2 = 089-093) the rate of carotenoid extraction in the above-mentioned solvents Carotenoid concentration increased with time, approaching a quasi-saturated condition at approximately 30 min of extraction

Measurement of the inclusive jet cross-section in proton-proton collisions at √s=7 $$ TeV using 4.5 fb−1 of data with the ATLAS detector

Abstract: The inclusive jet cross-section is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using a data set corresponding to an integrated luminosity of 4.5 fb−1 collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-k t algorithm with radius parameter values of 0.4 and 0.6. The double-differential cross-sections are presented as a function of the jet transverse momentum and the jet rapidity, covering jet transverse momenta from 100 GeV to 2 TeV. Next-to-leading-order QCD calculations corrected for non-perturbative effects and electroweak effects, as well as Monte Carlo simulations with next-to-leading-order matrix elements interfaced to parton showering, are compared to the measured cross-sections. A quantitative comparison of the measured cross-sections to the QCD calculations using several sets of parton distribution functions is performed.