The preparation of Espresso Coffee (EC) is influenced by factors related to the coffee and water and other technical conditions related to the machine. Susana Andueza has presented her doctoral thesis about Influence of technological variables on espresso coffee quality. Antioxidant and pro-oxidant capacity of coffee in the University of Navarre.
The aim of this work was to investigate the effects of hot water temperature (88, 92, 96 and 98º C), water pressure (7, 9 and 11atm), grinding grade (coarse, fine and very fine) and coffee/water ratio (6.5, 7.5 and 8.5g/40mL) on the quality of three type of EC (Arabica, Robusta Natural Blend and Robusta Torrefacto Blend) in order to select the optimal conditions.
For the selection of the conditions, physicochemical analysis and sensorial analysis by a judges panel and volatile profile were carried out. For preparation of Espresso Coffees an experimental prototype machine was used.
Garazi Andonegi | Basque research
The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung
A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences