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UCLA Engineers Shed New Light on 3-D Motion of Human Sperm Cells

By Guest PostSeptember 20, 2012Health, Scienceaydogan ozcan, biophysics, corkscrew, curved, distance, helical, human, illumination, liang xue, light source, linear, micrometers, microorganism, optical microscope, rotation speed, sperm cell, statistical behavior, swimming pattern, three-dimensional, ting wei su

Using new lensless imaging platform, team observes rare helical movements

A team of researchers from the UCLA Henry Samueli School of Engineering and Applied Science has, for the first time, directly recorded the three-dimensional helical swimming patterns of human sperm cells.

The team, led by Aydogan Ozcan, associate professor of electrical engineering and bioengineering, developed a novel lensless computational imaging platform that accurately tracked more than 24,000 individual sperm cells in a large volume. This involved observing the individual rotations of each sperm cell, including helical movement patterns, rotation speed, and linear and curved distances traveled. (more…)

Projected Losses of Arctic Sea-Ice and Polar Bear Habitat may be Reduced if Greenhouse Gas Emissions are Stabilized

ANCHORAGE, Alaska – Sea-ice habitats essential to polar bears would likely respond positively should more curbs be placed on global greenhouse gas emissions, according to a new modeling study published in the journal, Nature.

The study, led by the U.S. Geological Survey, included university and other federal agency scientists. The research broke new ground in the “tipping point” debate in the scientific community by providing evidence that during this century there does not seem to be a tipping point at which sea-ice loss would become irreversible. (more…)

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UCLA Engineers Shed New Light on 3-D Motion of Human Sperm Cells

Projected Losses of Arctic Sea-Ice and Polar Bear Habitat may be Reduced if Greenhouse Gas Emissions are Stabilized