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Showing results 1-10 of 27 for 'water'

  • Halevy_Ocean_SciTips
    First Oceans May Have Been Acidic

    Looking back at the very earliest oceans, Dr. Itay Halevy found that they started off acidic and gradually became alkaline. His work sheds light on how levels of ocean acidity in the past were controlled by carbon dioxide in the atmosphere, an important process for understanding the effects of climate change, as today the oceans are again becoming acidic.

  • naaman_electron spin
    Controlling Electron Spin for Efficient Water Splitting

    Splitting water molecules to produce hydrogen for fuel holds promise for alternative energy. However, current methods of water splitting also form hydrogen peroxide, which adversely affects the process. Now, Prof. Ron Naaman and an international team have found a way to control the spin of electrons, resulting in hydrogen-peroxide-free water splitting.

  • green rust_comp
    A Rusty Green Early Ocean?

    How were the Earth's solid deposits of iron ore created? While researching possible conditions on Mars, Dr. Itay Halevy discovered "green rust" - rare today, but apparently common billions of years ago. While this would have been just one of several means of iron deposition, green rust seems to have delivered a large proportion of iron to our early ocean.

  • the-secret-of-how-sea-urchins-get-their-spines
    The Secret of Seawater Spines

    As Nature World News reports, Weizmann Profs. Lia Addadi and Steve Weiner have found that sea urchins form their spines in a very different way than scientists imagined: they "drink" seawater to get the crucial calcium ions.

  • sea urchin
    Making Spines from Sea Water

    Following up on earlier research - and using technologies that did not exist then - Profs. Lia Addadi and Steve Weiner answered long-held questions: where do sea urchins get the calcium ions they need to build their spines? The answer: they "drink" sea water, even as larvae. And it turns out that other organisms use the same surprising process.

  • Saving Reefs One Polyp at a Time

    Coral reefs are the canaries in our environmental coal mine, serving as front-line warnings of damage from climate change. They are also, as The Scientist says, “notoriously difficult to study.” Until now. Weizmann scientists have “discovered how to study coral organisms in unpresented detail” – a breakthrough that could help grow healthy new coral.

  • “Coral on a Chip” Cracks Coral Mysteries

    The world’s corals are dying, with tremendous effects on climate and ocean health – however, much about coral, and why it dies, is still unknown. Now, Dr. Assaf Vardi and his team have created a new experimental platform – a “coral on a chip” – that lets them grow coral in the lab to study the structures’ complicated lives at microscale resolution.

  • California Drought: What Would Israel Do?

    California’s devastating drought is leading it to turn to Israel – another semi-arid state – for help. As Prof. Brian Berkowitz says, Israel is “a microcosm of what needs to be done.” When it comes to achieving water security, Israel’s decades of success in water management just might provide the life vest California needs.

  • Science Tips, January 2015

    Three updates from the the Weizmann Institute: Japan and Israel combine forces to advance brain research; new findings show that autistic brains are nonconformist; Peruvian schools adopt Weizmann’s Blue Planet science education curriculum.