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By jsyeem shekelsPublished 3 years ago 4 min read

Physiology

A new way to lose weight: local hyperthermia activates beige fat

Recently, researchers from the School of Life Sciences of East China normal University and the sixth people's Hospital affiliated to Shanghai Jiaotong University have found that beige fat (Beige fat) in human body can activate thermogenesis through local hyperthermia, reduce obesity symptoms and improve metabolic disorders. On March 4, the study was published as a cover article in the journal Cell.

Scientific event

The rocket wreckage hit the far side of the moon at a speed of about 9300 kilometers per hour

The wreckage of a 4-ton rocket crashed into the far side of the moon at a speed of about 9300 kilometers per hour at 20:25 Beijing time on March 4. At present, the impact has not been directly observed, and the speed and impact time of the rocket wreckage are calculated from the orbit based on telescope observations. This is the first known impact of space junk on the moon, and astronomers speculate that the impact should form a crater 10 to 20 meters in diameter.

Biological engineering

Cultivate algae as a low-cost renewable energy

Algae can be used as biofuel and animal feed for ethanol extraction, which has great application potential, but there may be some problems such as low yield and high harvest cost caused by fast growth and mutual shading in the process of culture, which makes it difficult for its commercialization. A study published in the journal Nature Communications pioneered the introduction of artificial intelligence to solve the problem.

Scientists have developed an artificial intelligence model to predict the parameters of algae growth, including light permeability, growth rate and density, in order to determine the timing of culture medium and harvest, and to keep the algae growing rapidly at the optimal density. maximize the use of light. At the same time, in order to solve the problem of difficult harvest, they also designed a kind of cyanobacteria Synechococcus elongatus UTEX 2973 through bioengineering, which can produce limonene, increase the hydrophobicity of cell surface, make it aggregate and precipitate, and facilitate collection. Their method achieved an output of 43.3 grams per square meter per day in outdoor experiments, far higher than the 25 grams per square meter per day set by the U.S. Department of Energy, and greatly reduced related costs. there is hope for the large-scale commercialization of algae as renewable energy.

Physics

Realization of a two-element neutral atomic system with 512 qubits

As the basic component of quantum computer, qubits can be made by different technologies, one of which is to use laser to capture neutral atoms to produce qubits. However, the neutral atomic system used in quantum computing is limited to a single atomic element array. Because each atom in the array has the same characteristics, it is extremely difficult to measure a single atom without interfering with the adjacent atoms. Recently, in a study published in physical Review X, researchers created a two-element neutral atomic array of rubidium and cesium atoms that can control each atom separately. the first neutral atomic system consisting of 512 qubits was achieved.

In a hybrid array of atoms of two different elements, two adjacent atoms can be different elements with completely different frequencies. This makes it easier for researchers to measure and manipulate individual atoms without interference from surrounding atoms. The team used 512 optical tweezers to capture 256 rubidium and cesium atoms and observed that the interference between the two elements was negligible. The researchers say the findings will contribute to a wide range of research, including quantum non-destructive measurement, quantum error correction, and continuous operation of quantum processors and sensors.

Health

Alcohol intake is exponentially related to brain aging.

Heavy drinking can change the structure and capacity of the brain, resulting in a decrease in white matter and gray matter in the brain, leading to cognitive impairment. But some studies suggest that moderate alcohol consumption has no effect, and that a small amount of alcohol intake can also bring benefits to the elderly. According to a new study published in the journal Nature Communications, moderate drinking, that is, a few glasses of beer or wine a week, can cause brain damage.

In the new study, scientists calculated the volume of white matter and gray matter in various regions of the brain of 36000 adults using an MRI and found that light and moderate alcohol consumption was associated with a decrease in brain volume, and the greater the alcohol intake, the more significant the decrease. They found that for a 50-year-old adult, an average daily increase in alcohol consumption from one unit of alcohol (about half a bottle of beer) to two units of alcohol (about one bottle of beer or a glass of wine) would age the brain by two years. Rising from 2 alcohol units to 3 alcohol units can age the brain by 3.5 years. Studies have shown that alcohol intake may have an exponential relationship with brain aging, and reducing alcohol consumption may improve brain aging.

Spaceflight

China plans to complete the Mars sampling and return mission by 2030.

Wu Weiren, member of the standing Committee of the National Committee of the Chinese people's political Consultative Conference (CPPCC) and chief designer of China's lunar exploration project, said recently that China plans to complete the Mars sampling and return mission by 2030. This project is much more difficult than lunar sampling and return, and the first problem to be solved is to develop a carrier rocket with greater thrust. In the follow-up, China is also preparing to conduct marginal exploration of the solar system. Wu Weiren said that China plans to achieve the goal of "two hundred" by 2049, that is, to complete 100 astronomical units, or deep space exploration 15 billion kilometers away, in the centenary of the founding of New China.

Science

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jsyeem shekels

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