Tag: מדע

Discovery of 45 rare neutron-rich isotopes provides clues to the stellar formation of heavy elements

. Many of Earth’s resources, from copper to more precious metals, are often taken for granted, but the only place to make more of these elements lies at the interior of stars. Despite this cosmological reality, however, scientists are yet to fully understand the stellar process that produces many of the heavier elements in the …

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הטיפשות של אתמול, החוכמה של מחר – והאם כל מה שאינו אסור על-פי חוק טבע – אכן חייב להתקיים בעתיד

. הפיסיקה של הבלתי אפשרי. מיצ'יו קאקו. תרגום: אוריאל גבעון. יעוץ מדעי למהדורה העברית: ד"ר דני גליק. עורכת ראשית: חיה לנדא. הוצאת אריה ניר. 304 עמודים. . מדענים עוסקים, בהגדרה, בהרחבת גבולות הידע ובחיפוש אחר עובדות חדשות ותובנות חדשות על חוקיו הבסיסיים של היקום שבו אנו חיים. אבל באיזושהי דרך מוזרה, לא מעט פעמים, רבים …

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Nuclear physics incorporates a 'strange' flavor

. Calculating the binding energy between hyperon particles contributes to understanding a new type of neutron star . In 2009, physicists from Japan’s KEK high-energy proton accelerator announced the sighting of a rare event: an unusually bulky beryllium nucleus that, in addition to four protons and five neutrons, contained two particles called ‘hyperons’. . Now, …

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Critical viewing – The maturation of inhibitory synapses in the visual cortex is modulated by visual experience

. Sensory experience changes the way humans see the world during early postnatal development. Now, an international team of researchers, including Tadaharu Tsumoto from the RIKEN Brain Science Institute in Wako, may have an explanation. They report in the journal Neuron that visual experience drives the maturation of inhibitory synapses in the visual cortex during …

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Clogging up the plumbing – A specific gene is regulating the formation of water-transporting vessels, In plants

. Vascular development in plants is controlled by a newly identified gene regulator that can block the formation of water-transporting vessels . Every vascular plant contains an extensive network of xylem and phloem, specialized tissues that respectively transport water and nutrients throughout the plant body. Untangling the processes that determine how these two types of …

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Neural Stem Cells Attack Glioblastoma Cells

. In their latest research, scientists of the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch, Germany, have demonstrated how the brain’s own stem cells and precursor cells control the growth of glioblastomas. Of all brain tumors, glioblastomas are among the most common and most aggressive. Dr. Sridhar Reddy Chirasani, Professor Helmut Kettenmann and Dr. …

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