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March 11, 2022

The butterfly hunter from the Jezreel valley dreamed of studying biology, until he came across an old physics book and discovered that natural phenomena can be calculated with mathematical tools. You are here Home > Publications > Milestone > In a nuclear shell Share tags Yigal nuclear thalamiphysics The shell model When the Soviet government closed the schools that taught Hebrew, Prof. Ben-Zion Dinburg (later Dinor, Minister of Education and Culture) arranged immigration licenses ("certificates") for teachers in the hope of bringing them to kibbutzim and moshavim. Thus, four years after the founding of Kfar Yehezkel, the second workers' settlement in the Land of Israel, the Ptolemy (formerly Smilansky) family, who immigrated from Ukraine in 1925, joined its ranks: the parents Moshe and Leah, teachers of Hebrew, their daughter Tahia, about ten years old, and their toddler son, Yigal, less than one year old. On the ship that arrived from Odessa to Jaffa there were two more families of teachers, but they stayed in Tel Aviv, which seemed quite pioneering to them. Yigal grew up in Moshav at the foot of the Gilboa, in the heart of the Jezreel Valley, and studied until the XNUMXth grade at the school in the village that his father ran (one of his students, Azaria Alon, wrote highly of Moshe Ptolemy). The XNUMXth grade was in the Geva group, and Vigal and four other boys walked to the Geva every morning. When it rained and water flowed in the wadi between the settlements, crossing was not possible. Prof. Yigal Ptolemy. Contributed a lot to shaping the image of the Weizmann Institute

in the nuclear envelope

The butterfly hunter from the Jezreel Valley dreamed of studying biology, until he came across an old physics book and discovered that natural phenomena can be calculated with mathematical tools
mussels Illustration: depositphotos.com Soyuz launcher on the launch pad in Baikonur, Kazakhstan. Illustration: depositphotos.com

An innovative adhesive inspired by marine molluscs

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Researchers used an innovative method to replace proteins used to stick molluscs to different surfaces, developing a stronger-than-expected glue
How the body packs 2 meters of DNA into a tiny cell nucleus. Courtesy of Tel Aviv University

How does the human body pack 2 meters of DNA into a tiny nucleus that is only a few thousandths of a millimeter in size

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Since the genes are found along the length of the DNA, then the staggered way in which the DNA is arranged inside the nucleus separates the genes according to the content of their building blocks and thus the DNA is actually packed inside the tiny nucleus
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