Comprehensive coverage

exact sciences

Researchers have used a variety of methods in order to reveal the different polymorphs that can be prepared from a common crystalline material and the paths of conversion from one configuration to another depending on the temperature and the method of preparation. [Source: Thomas Rades/University of Copenhagen]

New insights into polymorphisms could influence drug development

  • No comments
Researchers have used a variety of methods in order to reveal the different polymorphs that can be prepared from a common crystalline material and the paths of conversion of one configuration to another depending on the temperature and the method of preparation
time travel. Illustration: depositphotos.com

Exploring the reality of time travel: science fact versus science fiction

  • 7 תגובות
While Einstein's theory of relativity shows the relationship between time and speed. Theoretical ideas such as wormholes offer possible methods, but practical challenges and paradoxes, such as the "grandfather paradox", complicate the feasibility of time travel in practice
Prof. Gonen Ashkenazi. From a private album

The prestigious ERC Synergy grant was given to the chemistry researcher, Prof. Gonen Ashkenazi Mauni' Ben-Gurion

  • No comments
Prof. Ashkenazi from the chemistry department at Ben-Gurion University is engaged in a new field - chemistry of complex systems. The grant was given to him and an international research group of which he is a member
Prof. Ado Kaminer in his laboratory. Photo: Nitzan Zohar, Technion Spokesperson

Towards the discovery of quantum phenomena that have not yet been observed: Prof. Ado Kaminer of the Technion won an ERC Consolidator grant

  • 3 תגובות
"The observations will be made possible through the control we have developed over the wave nature of free electrons," explains Prof. Kaminer
A metal-organic network (MOF) capable of safely trapping fluorine compounds

Metal-organic frameworks (MOF) can safely trap fluorine compounds

  • One response
Metal-organic frameworks (MOF) can safely trap fluorine compounds within their pores at room temperature and release them when needed
Winners of the Nobel Prize in Chemistry 2023. Ill. Niklas Elmehed © Nobel Prize Outreach

Nobel Prize for scientists who managed to create quantum dots - the technology behind the QLED screens

  • 2 תגובות
Today, quantum dots, which are tiny nanoparticles whose size determines their properties, illuminate computer monitors and TV screens when these are based on QLED technology. In the field of medicine, quantum dots are currently used to map biological tissues
From the left, Prof. Franz Krause, and Prof. Anne L'Ollier during the ceremony of receiving the Wolf Prize from the President of Israel Yitzhak Herzog. Photo courtesy of the Wolf Foundation

Nobel Prize in Physics for 2023 to researchers who managed to measure tiny and fast processes in electrons

  • One response
The 2023 Nobel Prize in Physics was awarded to three researchers: Pierre Agostini, Ferenc Krausz and Anne L'Huillier for "the development of their methods that produce extremely short attosecond pulses of light For the study of the dynamics of electrons inside the material"
DALEE 2's interpretation of the matter of floating anti-matter atoms.

For the first time, the free fall of antihydrogen atoms was measured and the effect of gravity on antimatter was discovered

  • 3 תגובות
"This is the first measurement ever made of the free fall of antimatter (antihydrogen) atoms that directly shows that they really fall down," explained Prof. Eli Sharid from the Physics Department at Ben-Gurion University of the Negev, the member of the ALPHA collaboration group
Caption: Above, azobenzene is a molecule that can change its shape with light. An azobenzene molecule switches between two forms under the influence of light. In the lower figure: a molecular cage containing the molecules of the photosensitizer azobenzene. The new mechanism is based on a supramolecular approach in which the molecules of azobenzene and the photosensitizer are locked together in a molecular cage. The limited space accessible to the caged molecules allows only the E-form, but not the Z-form of azobenzene, so this molecule is pushed out of the cage. Credit: Jonathan R. Church

Publication in Science magazine about a new discovery: using harmless light to change the shape of an azobenzene molecule within a supramolecular complex

  • 2 תגובות
Azobenzenes are versatile compounds with many potential uses, such as advancing technology through the production of tiny machines, as well as creating light-activated drugs. These molecules can be found in two different forms called "E" and "Z" which can be exchanged between them through irradiation. However, under irradiation conditions both forms are in equilibrium, which prevents optimal utilization for different applications
optical network. Illustration: depositphotos.com

Hebrew University researchers have created the smallest color switch in the world

  • 2 תגובות
The quick color switch allows an immediate change of the emitted color. The discovery has implications for diverse technologies in which fast color adjustment is required, such as display screens, quantum communication and miniaturized light sources
Crystal pump to generate quantum light for medical imaging devices. Photo courtesy of Shalom Schwartz

CAT scan for Schrödinger's cat

Quantum effects in X-rays make it possible to improve the resolution of the scan and protect the health of subjects and doctors
In the photo: a five-dimensional cube that Dr. Klein printed with a XNUMXD printer for his supervisor. Photo: Bar Ilan University Spokesperson

led to the solution of a 35-year-old mathematical problem

Meet Dr. Ohad Klein, PhD graduate in the Department of Mathematics at the Faculty of Exact Sciences, postdoctoral student at the Hebrew University and working at a startup company as an algorithmist
The enzymes of the start-up company break down the polyethylene terephthalate plastic into its monomers: terephthalic acid as well as ethylene glycol, which themselves can be used directly in existing plants to re-produce the polymer

Plastic recycling with the help of enzymes

  • No comments
The French biotech start-up company called 'Carbios' succeeded in developing an enzymatic process to recycle the plastic polyethylene terephthalate (Polyethylene terephthalate) back to its component monomers, from which the finished polymer can be produced again
The white cells in the shrimp tail. Photo: Ben Gurion University

The shrimp redefines the laws of optics

  • No comments
The shrimp has a particularly bright white color on its back and limbs that are intended to attract fish, which it 'cleanses' of pests it feeds on. An in-depth examination of the white substance using special electron microscopes revealed that the substance consists of an incredibly thin layer of very dense nanospheres (spheres of very tiny diameter)
Laser in a physics lab. Illustration: depositphotos.com

A new method of creating quantum light sources will help in encryption and solving security problems

Prof. Adi Aryeh: "We are standing at the threshold of a new technological world, and with it comes a host of new opportunities alongside a host of problems we have not yet encountered."
complex networks. Illustration: depositphotos.com

The ability to simply explain complex physical networks

Doctoral student Benia Gros from the Department of Physics, the President's Scholar, has so far published 15 articles and one book, and presented his works dealing with dependent physical networks, at 9 conferences
Higgs boson. Illustration: depositphotos.com

Physicists have developed tools to discover unknown interactions between elementary particles. Are we on the way to a new physics?

Prof. Yael Shadami from the Faculty of Physics at the Technion focuses on the study of elementary particles including electrons, quarks, photons and gluons, and the interactions, or forces, that act between them. It tries to discover more elementary particles and interactions, beyond those described in the "standard model" of particle physics
"Scale of Polarizations"

electronic skips

Researchers have built surfaces from layers of atoms that slide over each other, thus causing the electrons inside to skip. In the future, they hope that it will be possible to develop advanced information technologies based on them

Three free lectures in honor of World Quantum Day on May 10

  • One response
On May 10, three lectures in the field of quantum will be delivered to the general public, zoomed and free of charge. The event is being held in honor of World Quantum Day under the auspices of the Center for Quantum Information at the Hebrew University. No need to register in advance.

For the first time: the experiment of the two cracks in the timeline

  • No comments
In an article published in the magazine Nature Physics, a team of researchers from Britain, the USA, Germany and Australia demonstrated for the first time the two cracks experiment in the timeline. Instead of spatial dispersion on a screen, the temporal crack created a dispersion in the light spectrum, and from the combination of another crack an interference pattern similar to the spatial pattern from the classic experiment was created. The experiment opens a window for the construction of time-varying optical instruments in a reliable and stable manner.
Prof. Binghai Yan. Unexpected enlightenment. Courtesy of the Weizmann Institute

And let there be light, more light

It started with very strange experimental results, continued in a new physical theory about the behavior of photons, and in the future may improve our smartphone screens and allow faster data communication. faster data
Light and algae in the Rosh Hankara cave. Photo by Prof. Zvi Dubinsky and the other researchers.

A unique combination of light and algae in the Rosh Nikara cave - the National Science Foundation

Measuring the light reflected from the algae makes it possible to calculate the light used for photosynthesis

Will a muon accelerator save particle physics?

  • 3 תגובות
In recent years, physicists from around the world have been discussing the construction of a muon accelerator instead of other conventional accelerators based on protons or electrons. Such an accelerator has clear advantages in discovering new physics, but its construction is accompanied by many technological challenges. In this article I will review the words of Prof. Nima Arkani-Hamed from the Institute for Advanced Studies in Princeton on the need to build such an accelerator.
Premilab campus near Chicago. Photo courtesy of the Permilab National Laboratory

The largest particle accelerator in the US will undergo an upgrade and reopen after more than a decade of shutdown

  • No comments
The upgrade is expected to last several years and will include the construction of a new building to house the upgraded accelerator. Permilab is also planning to build a new particle detector, which will be used to study the particles produced by the Tevatron.
organic molecules. Illustration: depositphotos.com

Identification of organic compounds using visible light

  • No comments
Researchers from the University of Santiago in Chile, working in the field of machine learning, have succeeded in developing an innovative method for identifying organic compounds based on the refractive index at a single optical wavelength
Science website logo
Skip to content