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Author Archives: rberkowitz
Shape-Shifting Proteins Follow Diffusion Rules
How quickly a protein diffuses in a liquid depends directly on its radius, which changes as the protein’s conformation fluctuates. Continue reading
Loopy Pipe Network Converts AC to DC
A simple network of pipes based on the structures of a bird’s lung transforms back-and-forth flow into one-way flow. Continue reading
At-Home Experiment Exposes Gel Cracks
Kept out of the lab by COVID-19, an undergraduate student has performed experiments in his living room, revealing a mechanism for fracture elongation in soft materials. Continue reading
Evolutionary insights into shape-shifting proteins
Over millions of years a protein that now folds into two stable structures likely favored first one configuration, then the other, before settling on both. Continue reading
A tabletop waveguide delivers focused x rays
By simultaneously generating and guiding beams, the layered anode emits x rays in one direction without the need for mirrors or large-scale accelerators. Continue reading
The Entangled Dance of Atom Beams
Entangled pairs of ultracold atoms interfere in a double waveguide. Continue reading
Femtosecond Probe Catches Electrons Relaxing
Pump-probe experiments measure the time it takes for electrons to thermalize and cool after photoexcitation. Continue reading
Evolutionary insights into shape-shifting protein
A protein that has two stable structures likely evolved from an ancestor that had only one. Continue reading
A Vortex in an Egg Cell
During a fruit-fly egg cell’s early development, its internal fluid begins to swirl in a vortex—a transition caused by the coordinated behavior of elastic filaments in the cell. Continue reading
Railways could double as a tool for probing Earth’s shallow crust
Seismologists prospect for mineral deposits in Canada by recording the humming vibrations from freight trains. Continue reading
Rachel Berkowitz 