In the context of the importance of water molecules for protein function/dynamics relationship, the role of water collective dynamics in Chlamydomonas green algae carrying both native and mutated ...photosynthetic proteins has been investigated by neutron Brillouin scattering spectroscopy. Results show that single point genetic mutation may notably affect collective density fluctuations in hydrating water providing important insight on the transmission of information possibly correlated to biological functionality. In particular, we highlight that the damping factor of the excitations is larger in the native compared to the mutant algae as a signature of a different plasticity and structure of the hydrogen bond network.
REM: Automatic for the People Molinari, Emilio; Covino, Stefano; D'Alessio, Francesco ...
Advances in Astronomy,
01/2010, Letnik:
2010, Številka:
1
Journal Article
Recenzirano
Odprti dostop
We present the result of a year-long effort to think, design, build, realize, and manage the robotic, autonomous REM observatory, placed since June 2003 on the cerro La Silla, ESO Chile. The various ...aspects of the management and control are here surveyed, with the nice ideas and the wrong dead ends we encountered under way. Now REM is offered to the international astronomical community, a real, schedulable telescope, automatic for the People.
The REM Observing Software Stefanon, Mauro; Covino, Stefano; Fugazza, Dino ...
Advances in Astronomy,
01/2010, Letnik:
2010, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The Rapid Eye Mount (REM) is a 60 cm robotic telescope located at La Silla, Chile. Its Observing Software (REMOS) is constituted by a set of distributed intercommunicating processes organized around ...a central manager. Together they grant the system safety, automatically schedule and perform observations with two simultaneous cameras of user-defined targets, and drive fast reaction to satellite alerts. Subsequent data reduction is left to pipelines managed by each camera.
During the last years, a number of telescopes have been dedicated to the followup of the GRBs. But after the Swift launch, the average observed intensity of the GRBs showed to be lower than thought ...before. Our experience with the robotic 60 cm REM telescope confirmed this evidence, with a large number of lost GRBs. Then, we proposed to study the feasibility of a 4 m fast pointing class telescope, equipped with a multichannel imagers, from Visible to Near Infrared. In this paper, we present the main result of the feasibility study we performed so far.
We performed a neutron scattering study to investigate the dynamical behaviour of water absorbed in Nafion at low hydration levels (λ = 6, λ = moles of water/moles of sulphonic acid sites) as a ...function of temperature in the range 200-300 K. To single out the signal of the confined water, the measurements were performed on samples hydrated with both H
2
O and D
2
O in the same temperature range. Due to the strong incoherent scattering cross section of hydrogen atoms with respect to deuterium, in the difference spectra the contribution from the Nafion membrane is subtracted out and most of the spectra originates from absorbed water. The estimated dynamical susceptibility exhibits features that resemble those of bulk water. In particular, the spectra display a bump at around 1 meV, possibly related to the α relaxation, the intensity of which is markedly affected by the temperature change. Two features due to the phonon-like collective hydrogen bond network dynamics are visible at approximately 7 meV and 25 meV.
This work summarizes the main outcomes of the EMERGENT project that was mainly focused on the design of chipless RFID sensors and their realization on green substrates. Three different sensors are ...presented for monitoring humidity, temperature and breathing.
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