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Contraceptive pills affect memory

28.02.2021

The memory of women who take birth control pills: changes under their influence. They remember the essence of emotionally rich events better, but forget the details. Such features of memory are usually more characteristic of men.

They remember the essence of emotionally rich events better, but forget the details. Such features of memory are usually more characteristic of men.

Over 100 million women around the world take oral contraceptives. Scientists at the University of California, who over the past 10 years have studied the characteristics of the memory of both sexes, decided to find out how birth control pills affect memories. They conducted an experiment in which women were shown pictures of their mother, son, and a car accident, and told a story about a boy who was hit by a car.

After some time, scientists checked what the participants in the experiment remembered. Women taking birth control pills remembered key events such as the accident, the transport of the injured boy to the hospital, the surgery that saved him. Women who did not use oral contraceptives were also able to remember small details, such as the color of the car, etc.

Scientists explain that contraceptives suppress the production of female sex hormones such as estrogen and progesterone. These hormones promote figurative memory in the fairer sex, in which the left hemisphere of the brain is mainly involved. This feature of women's memories may be the reason why women are more likely to suffer from post-traumatic stress than men, whose memory is more associated with the work of the right hemisphere.

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Ion-optical quantum microscope sees individual atoms 09.03.2021

Researchers at the University of Stuttgart have developed a new ion-optical microscope that uses quantum effects to create images of individual atoms. Note that in recent years, scientists have created many variants of the so-called gas quantum microscopes, but their resolution allows you to consider objects with a size of about 0,5 micrometers. This is enough to be able to consider isolated groups of atoms, and now German researchers have pushed the boundaries of human visual perception to the level of individual atoms.

The key component of the new microscope is the so-called electrostatic lens, through which and on the surface of which charged particles such as electrons and ions can move. Electrostatic lenses work similarly to conventional lenses used in conventional cameras and phone cameras. But if ordinary lenses refract and focus light due to the curvature of their surface, then electrostatic lenses do the same with the help of "clouds" of ions moving along their surface. Moreover, the optical parameters of electrostatic lenses are very easy to change by changing the electric potential applied to them and, consequently, the strength of the electric field.

In the new microscope, scientists used a "package" of three different types of electrostatic lenses and a device that ensured that only ions of one particular type were transferred to the surface of these lenses. In addition, the design of the microscope has a special trap in which the atoms that are the objects of photography are held.

In their experiments, scientists used rubidium atoms cooled to ultra-low temperatures and held in the cells of an optical lattice. The shooting itself was carried out by applying pulses of laser light, which led to the photoionization of atoms, which turned into rubidium ions. Due to some effects, these ions remained virtually immobile in their places for 30 nanoseconds, getting entangled at the quantum level with more and more nearby ions. And after that they were released into the working space of the microscope, where the survey was made.

Testing the capabilities of the new microscope showed that with its help it is possible to see individual elements ranging in size from 6.79 to 0.52 micrometers with 532-nanometer intervals between them, which makes it quite possible to obtain images of individual atoms. And the depth of the created image is 70 micrometers, which is enough to create real three-dimensional images.

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