Wednesday, July 28

ciencia

ciencia, tecnología, Tendencias

This device turns our sweat into energy | Digital Trends Spanish

Generating energy without moving a single finger is already possible. Engineers from the University of California, San Diego have developed a new wearable device that converts sweat from human fingertips into an optimal source of energy for small sensors and electronic devices. It is a thin, flexible strip that can be placed on the tip of a finger like a band-aid or band-aid and that generates small amounts of electricity when the finger sweats or pressure is applied with the pad. According to an article published in the Joule magazine by Joseph Wang, professor of nanoengineering at UC San Diego, the device could be used in any daily activity that involves touch, “in situations that anyone would normally do, such as being at work, at home, while watching television or eating. ”. The de...
algas, ciencia, Noticias, sexo

Scientists discover algae with three different sexes | Digital Trends Spanish

A team of researchers from the University of Tokyo believe that algae could help us understand how different sexual systems evolved. For 30 years, the associate professor at the University of Tokyo, Hisayoshi Nozaki, visited the Sagami river daily to collect algae samples. Through samples collected in 2007 and 2013 from the Sagami River and Lake Tsukui, the researchers identified a species of freshwater algae that evolved into three different sexes, all of them capable of reproducing. The three sexes identified in Pleodorina starrii algae are male, female, and a third sex that researchers call bisexual. This third genus is capable of producing male and female sex cells in a single genotype. To carry out the research, colonies are isolated and then deprived of nutrients to force sexua...
astronomía, Astrónomo, cannabis, carl sagan, ciencia, científico, consumo de marihuana, marihuana, Noticias, Tendencias

Carl Sagan recounted in an essay how much he enjoyed marijuana | Digital Trends Spanish

Carl Sagan is one of the most respected and recognized characters in the field of science and astronomy, we practically know everything about this author in his professional field. However, we still have to know some intimate aspects of his personal life, specifically what was his opinion on some issues that to this day, unfortunately, continue to generate controversy. One of these issues is marijuana use. The well-known astronomer even wrote an essay under a pseudonym about his experience consuming this plant. The story appeared in the book Marijuana Reconsidered by Dr. Lester Grinspoon, published in 1971. In the text, Sagan appeared as Mr. X and his secret was kept until his death, revealing his position on marijuana in his biography Carl Sagan: A Life. In the essay, which can be re...
carne cultivada, carne de laboratorio, ciencia, Tendencias

The world’s first artificial meat factory opens its doors | Digital Trends Spanish

Laboratory-grown meat is no longer a utopia. Future Meat Technologies, one of the most important companies in the development of technology to produce cultured meat, has opened the world's first artificial meat factory. The plant, located in Rehovot, Israel, has the capacity to produce 500 kilograms of cultured meat per day, which is equivalent to 5,000 hamburgers. The company claims to be the first in the industry to break a price record, producing farmed chicken breasts for just $ 3.90. "As our technology advances, prices will continue to drop, making farmed meat affordable around the world." The company intends to take its production of cultured meat, clean, sustainable and without GMOs (genetically modified organism) by the year 2022 to different territories, including the Unite...
ciencia, cocodrilo, Harvard, helio, humor, nobel, Noticias, reptiles, Tendencias

They choose the most absurd scientific investigations of the year | Digital Trends Spanish

Science doesn't always have to be serious or practical, it can also be fun (and ridiculous). This has been demonstrated by the 2020 delivery of the IG Nobel, a parody of the Nobel that recognizes the most absurd scientific investigations. The ceremony takes place every year in the Sanders Theater ceremonial hall at Harvard University and is organized by the scientific humor magazine Annals of Improbable Research, under the motto "prizes that make you laugh and then think". However, the health crisis forced this edition to be carried out virtually. This did not prevent singular investigations from being highlighted, such as the one that sought to determine whether it was possible to make a knife using frozen human feces, or the one that sought to verify that many scient...
ciencia, crustaceo, esperma, Espermatozoide, Hallazgos científicos, Noticias, Tendencias

Sperm from 100 million years ago found | Digital Trends Spanish

An international team of paleontologists made an incredible discovery when they discovered in a piece of amber analyzed in Burma, fossilized sperm in a small crustacean that would be one hundred million years old. It would be the oldest found so far. The team of researchers was led by Dr. He Wang of the Chinese Academy of Sciences and the results were published this Wednesday in the journal Proceedings of the Royal Society B. The specimen to which the sperm belong is an ostracod called by scientists Myanmarcypris hui, a species that measures less than a millimeter and that has existed for 500 million years. Today it is possible to find it in rivers, oceans and lakes. The sperm were found inside a female specimen, so it is thought that it had to be fertilized before be...
Animales, ciencia, edicion genetica, ganado, genes, Noticias, Tendencias, Vacas

Genetic Advances to Produce Super Dads in Cattle | Digital Trends Spanish

The advancement of science and technology has achieved incredible results in the livestock industry. The most recent has been carried out by a group of scientists who have successfully created surrogate parents of animals that only carry the genes of donor animals, known as "super dads". According to researchers from the United States and the United Kingdom, this constitutes an important advance in gene editing with eventual applications for global food production. As part of the research, male goats, cows, pigs and mice were produced whose sperm carried the genetic traits of another male individual. This means that when these “super dads” reproduce, the resulting offspring are expected to carry all the genes of the male donor rather than the surrogate. Jon Oatley is ...
ADN, ciencia, medicina, modificacion genetica, Noticias, Tendencias

Genetically modified babies? Scientists pronounce | Digital Trends Spanish

In 2018, Chinese scientist He Jiankui shocked the world by creating the first gene-edited babies in history. At the end of this note, the former professor at the University of Science and Technology of the South (Shenzhen) is serving a sentence of three year prison for violating local regulations. "The nature of their behavior is serious and has constituted the crime of illegal medical practice," determined the Shenzhen Nanshan District People's Court. Two years after such a noisy case, an international panel of experts has established its position and made it available to the scientific community and civil society. Through a report that disclosed Associated Press, specialists indicated that "science is not advanced enough to guarantee the safety" of the procedure. Wayn...
ciencia, medicina, Noticias, Salud, tecnología, Tendencias

This artificial skin is so real that it reacts to pain | Digital Trends Spanish

Capable of electronically replicating the way the body perceives pain is an artificial skin created in Australia by researchers from the Royal University Institute of Technology Melbourne (RMIT). The innovation was called a "potential breakthrough for prosthetics and a high-tech alternative for skin grafts" by Sky News. The prototype "copies the way the skin can send instantaneous signals to the brain in response to painful sensations, as well as in response to changes in pressure or temperature," added the version. The team developed three proposals that detect and respond to changes in temperature and pressure thanks to their extensible electronic components. The researchers "hope that, with further development, this stretchable artificial skin can replace skin grafts...
bacterias, células, ciencia, Noticias, Tendencias

They confirm how bacteria become more aggressive | Digital Trends Spanish

Bacteria that invade animal cells to multiply are widespread in nature. Some of these are human and animal pathogens, whereas in the environment they are often found in single-celled organisms. But how have they managed to survive and adapt over time? A research team, led by Matthias Horn at the Center for Microbiology and Environmental Systems Science of the University of Vienna, analyzed in the laboratory, these bacteria adapt to their host cell over time and even, under certain conditions, become increasingly infectious. According to the study published in the journal Proceedings of the National Academy of Sciences (PNAS), this is due to changes in the genome and in gene expression, particularly in the genes that control the interaction of bacteria with their hosts...