Chemistry

Several molecules must work together for proper joint lubrication. In this illustration, the lubricin molecules anchor the long hyaluronan chains to the cartilage collagen network; these hyaluronan chains in turn attach the phospholipid molecules in either single layers (green) or double layers (blue)

Working under Pressure

11.03.2015

Materials Science

Lab experiments reveal that lubricating our knees and hips is a “joint” effort

A chicken heart muscle cell under a fluorescent microscope; the filaments consist of repeated subunits (bright dotted lines). The schematic representation shows three neighboring filaments; the black lines are the boundaries of their subunits, such that the lower filament is aligned with the middle one, while the upper one is not

In a Heartbeat

26.02.2015

Materials Science

A new model shows that the filaments in heart muscle cells don't automatically keep the beat

(l-r) Prof. Gershon Kurizki and Ephraim Shahmoon

Quantum Attraction

17.02.2015

Quantum Physics, Chemistry

An idea for trapping virtual photons is anything but empty

Tobacco mosaic virus

This Day in Science History: The discovery of viruses – “the filterable agents”(12/2/1892)

12.02.2015

Viruses & Microorganisms, Immunology, Disease, Drugs & Diagnostics, Plants and Agriculture, Organic Chemistry, Structural Biology

On 12/2/1892, the first evidence for the existence of viruses was presented: Dimitri Ivanovsky, a young Russian scientist, suggested before the...

A satellite image of Olympus Mons, Mars, the largest volcano in the solar system at about three times the height of Mount Everest. Around 3.5 to 4.0 billion years ago, the release of volcanic gases, especially the greenhouse gas sulfur-dioxide, may have warmed the surface of Mars episodically, thereby explaining the presence of geomorphological features indicative of the flow of water on the planet's ancient surface

How Water Could Have Flowed on Mars

18.11.2014

Planetary Science, Environment, Environment, Chemistry

A new model suggests volcanic activity in Mars’ distant past spewed enough greenhouse gases to warm the atmosphere and melt the ice

Microbes Take their Sulfur Light

Microbes Take their Sulfur Light

18.11.2014

Environment, Environment, Chemistry

A model explaining the preferences of deep-sea microbes can help reveal the ancient past – as well as predict the future

(l-r) Eyal Karzbrun, Alexandra Tayar and Prof. Roy Bar-Ziv

Artificial Cells Produce Real Proteins

27.10.2014

Molecular and Cell Biology, Genetics, Materials Science, Biotechnology

"Cells on a chip" are beginning to recreate biological processes

Magnetic resonance image of a rat’s brain subjected to a partial stroke in the right hemisphere (black square); the left hemisphere remained intact (green square)

Weakness into Strength

27.10.2014

Brain & Behavior, Chemistry, Diagnostic Techniques and Drugs

An MRI method for picking up the faintest signals can reveal the workings of the brain

(l-r) Eyal Karzbrun, Alexandra Tayar and Prof. Roy Bar-Ziv

Artificial Cells Act Like the Real Thing

18.08.2014

Molecular and Cell Biology, Genetics, Materials Science, Biotechnology

Cell-like compartments produce proteins and communicate with one another, similar to natural biological systems

(l-r) Dr. Ariel Livne, Prof. Benjamin Geiger and Dr. Eran Bouchbiner

How Cells Feel the Stretch

14.08.2014

Space & Physics, Molecular and Cell Biology, Chemistry

To understand how cells orient themselves, Weizmann Institute researchers turned to a model from physics

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