Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the imagemagick-engine domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /usr/local/data/sites/proginres/htdocs-SSL/wp-includes/functions.php on line 6121

Notice: La funzione _load_textdomain_just_in_time è stata richiamata in maniera scorretta. Il caricamento della traduzione per il dominio ct è stato attivato troppo presto. Di solito è un indicatore di un codice nel plugin o nel tema eseguito troppo presto. Le traduzioni dovrebbero essere caricate all'azione init o in un secondo momento. Leggi Debugging in WordPress per maggiori informazioni. (Questo messaggio è stato aggiunto nella versione 6.7.0.) in /usr/local/data/sites/proginres/htdocs-SSL/wp-includes/functions.php on line 6121
#electricity – Progress in Research

New optical tool will help decode bioelectric signalling in bacteria

A new optical tool will help scientists unlock the secrets of bacterial electrical signalling – paving the way for insights into antimicrobial resistance, drug efficacy and infection control.

Like neurons, bacteria use ion channels to process environmental cues and communicate with each other. Now, scientists have just discovered a tool which can modulate bacterial electricity, bringing new approaches to study and control bacterial cells.

Today, in a study published in Advanced Science, scientists at the University of Warwick and Politecnico di Milano, reported a major step forward in the field of bacterial electrophysiology.

The team used a membrane-targeted chemical, azobenzene (Ziapin2) to modulate the membrane potential in bacterial cells using light.

This powerful tool has the potential to advance our understanding of microbial phenomena and pave the way for new approaches to studying and controlling various bacterial processes – from the global threat of antimicrobial resistance to better developing the efficacy of pharmaceuticals.

The introduction of light-methods in bacteria can potentially open up new exciting research routes. Apart from addressing the urgent issue of antimicrobial resistance, this approach can be exploited to build up bacterial hybrids capable to perceive light and perform useful tasks, such as drug delivery in hard-to-reach body locations.

Giuseppe Paternò, assistant professor at the Department of Physics

This study was funded in part by Fondazione Cariplo.

A discovery about cuprates can reduce the costs of electricity

The results of a study by the researchers of the Politecnico di Milano, the Chalmers University of Gothenburg, the Sapienza University of Roma and the Sincrotrone Europeo ESRF could bring about a revolution in electricity production and distribution systems, reducing energy costs. 

The study, published in the prestigious Science magazine, reveals the unique behaviour of cuprates, superconductor materials composed of copper, oxygen and other elements.  

Superconductors are materials inside which electric current travels, below a certain critical temperature, with no resistance and therefore without wasting energy. Cuprates have an important property: even at a higher temperature than the critical one, when they are in a “normal” state and therefore do not display zero resistance, they behave in a non-conventional way. And in fact this has led to them being known as “strange metals”. This strangeness lies in the fact that their resistivity increases in line with the temperature, something that does not usually occur for normal metals. The international study shows that, in the normal state, the presence of charge density waves modifies the “strange metal” behaviour type of the cuprates and brings it more into line with that of normal metals. 

“This type of observation is highly significant because it finally shows a correlation between macroscopic properties (resistivity in the normal state, superconductivity) and microscopic properties (charge density waves). This may be the key to the problem long sought after by the theoreticians, a solid foundation on which to finally build the explanation of why superconductor cuprates behave in such a unique way.” 

explains Giacomo Ghiringhelli, professor of Experimental Physics at the Politecnico di Milano. 

To comprehend the importance of this discovery, we must consider that superconductivity is the most spectacular macroscopic manifestation of quantum physics, visible to the naked eye, essential for describing the phenomena on the atomic scale but not usually on the macroscopic scale. However, superconductivity is a macroscopic quantum phenomenon. Now we are discovering that even at a high temperature, in the “normal” state, cuprates display quantum behaviour, so can be defined as “ultra-quantum” matter.  

For more information: 
The online study 

Image credits: Yen Strandqvist/Chalmers 

Questo sito utilizza i cookies per le statistiche e per agevolare la navigazione nelle pagine del sito e delle applicazioni web. Maggiori informazioni sono disponibili alla pagina dell'informativa sulla privacy

Accetto