Dating Apps Accused of Promoting Addiction in Lawsuit Against Tinder, Hinge, and Match

Many of us have had the negative experience of being swiped left, ghosted, breadcrumbed, or benched on internet dating apps. On Valentine’s Day, six dating app users filed a proposed class action lawsuit alleging that Tinder, Hinge, and other Match dating apps use addictive game-like features to encourage compulsive use. The lawsuit claims that Match’s app “employs perceived dopamine-manipulating product features” that turn users into “trapped gamblers seeking psychological rewards,” resulting in expensive subscriptions and persistent usage.

The lawsuit was met with skepticism by some, but online dating experts say it reflects a wider criticism of the way apps gamify human experiences for profit. The addiction may have been built into dating apps from the beginning, with the swipe mechanism, invented by Tinder co-founder Jonathan Badeen, being compared to an experiment with pigeons that aimed to manipulate the brain’s reward system.

The game-like elements of dating apps are further exemplified in the Trump-style interface first used by Tinder, leading some experts to believe that dating apps are encouraging negative behaviors and making people feel manipulated. A study suggested that couples who met online are slightly more likely to have lower marital satisfaction and stability. Dating apps also appear to encourage “bad behavior such as ghosting, breadcrumbing, and backburner relationships,” according to some researchers.

However, dating apps have also been criticized for perpetuating idealized preferences for particular ethnicities, age groups, and body types, ultimately reproducing privilege. While dating apps widen the range of potential partners in theory, endless access to romantic possibilities has been shown to have negative effects on mental health, leading some experts to advocate for transparency around matching algorithms and education about the pitfalls of online dating.

Despite criticisms, a Match Group spokesperson dismissed the lawsuit, stating that the business model is not based on advertising or engagement metrics, and that the goal is to avoid addictive use of the app. They believe that the plaintiffs are pointing to a systemic problem in the dating app ecosystem.

Source: www.theguardian.com

Ancient bone beads discovered in Wyoming date back 12,940 years

Archaeologists have discovered ancient tubular beads made from hare bone at the La Prele mammoth site in Wyoming, USA. This is the oldest bead discovered in the Western Hemisphere.

La Prele bone beads. Polished end (top) and side view with notch (bottom). Image credit: Surovell other., doi: 10.1038/s41598-024-53390-9.

“The manufacture and use of personal ornaments, most commonly beads, is an important indicator of the increasing cultural and social complexity of humans during the Paleolithic period, first appearing in the Middle Stone Age of Africa. It then appeared in the Early Upper Paleolithic of Eurasia,” says the University of Wisconsin. Wyoming Professor Todd Surovell and his colleagues.

“Beads are not well documented from early archaeological contexts in the Americas, but some examples have been reported from Paleoindian regions, where the first immigrants to the Western Hemisphere used beads on their bodies and clothing. It shows that he created and used personal ornaments to decorate his home.”

Archaeologists examined ancient tubular beads from an active area centered around a hearth at the La Prele Mammoth ruins in Converse County, Wyoming, USA.

“The La Prele Mammoth Site is an early Paleoindian site located along La Prele Creek near its confluence with the North Platte River in Converse County, Wyoming,” they said.

“Test excavations in 1987 revealed an association between the chipped stone remains and the partial remains of a subadult.” Colombian mammoth (mammoth colombi)Subsequent excavations revealed that a nearby campsite preserved active areas centered around multiple hearths. ”

“The occupied surface was filled with low-energy dyke deposits, and based on an average of five radiocarbon dates of the bones, occupation occurred 12,941 years ago.”

The length of the beads is small, about 7mm. The inner diameter averages 1.6 mm and the outer diameter averages 2.9 mm.

“Two deep parallel grooves with a U-shaped cross section develop on the surface of the bead aligned perpendicular to the long axis,” the researchers said.

“Similar grooves also occur on Paleolithic and Archaic tubular bone beads, although it is unclear whether these notches are a byproduct of manufacturing, skinning, abrasion, or perhaps decoration. It's very smooth and polished.”

“The beads are lightly coated with red ocher, but the presence of ocher on the surface may be coincidental since they were recovered from a sediment contaminated with powdered hematite.”

To determine the origin of the beads, scientists extracted collagen for zooarchaeology by mass spectrometry, also known as ZooMS. This allowed us to gain insight into the chemical composition of bone.

Researchers believe that the beads are attached to either the metatarsals (the bones that connect the phalanges of the fingers to the more proximal bones of the limbs) or the proximal phalanges (the bones found in the fingers and toes of humans and other vertebrates). I concluded that it was made from either. rabbit.

The discovery provides the first solid evidence of the use of hares in BC. Clovis periodspecifically refers to the prehistoric period of North America, about 12,000 years ago.

“We also considered the possibility that the beads were the result of consumption and digestion by carnivores and were not produced by humans,” the authors said.

“However, carnivores are not common at this site, and the artifacts were recovered one meter away from a densely scattered area of ​​other cultural materials.”

“Additionally, the grooves on the outside of the beads are consistent with those made by humans with stones and teeth.”

“Such beads may have been used to decorate their bodies or clothing.”

of findings It was published in the magazine scientific report.

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TA Slovel other. 2024. Rabbit bones are used to make Clovis beads. science officer 14/2937. doi: 10.1038/s41598-024-53390-9

Source: www.sci.news

SOFIA’s discovery of molecular water on a seemingly dry asteroid

Astronomers used the FORCAST instrument on NASA's retired Stratospheric Observatory for Infrared Astronomy (SOFIA) to obtain mid-infrared spectra of four S-type (silicate-rich) asteroids: Iris, Partenope, Melpomene, and Massalia. Did. They detected features on two of her asteroids, Iris and Massalia, that could clearly be attributed to water molecules.



Arredondo other. Using his FORCAST instrument at NASA's SOFIA Observatory, he observed four silicate-rich asteroids and found mid-infrared spectral signatures indicating molecular water on two of them, Iris and Massalia. Separated. Image credit: NASA/Carla Thomas/Southwest Research Institute.

“Asteroids are leftovers from the planet-forming process, so their composition varies depending on where in the solar nebula they form,” said Dr. Anisia Arredondo, a planetary researcher at the Southwest Research Institute.

“Of particular interest is the distribution of water on the asteroid, as it may reveal how water was delivered to Earth.”

Anhydrous, or dry, silicate asteroids form close to the Sun, and icy material coalesces farther away.

Understanding the location of asteroids and their composition can help us understand how material within the solar nebula has been distributed and evolved since its formation.

The distribution of water in our solar system provides insight into the distribution of water in other planetary systems, and because water is necessary for all life on Earth, there is potential both within and outside the solar system. You will decide where to look for natural life.

“We detected features on the asteroids Iris and Massalia that are clearly attributable to water molecules,” Arredondo said.

“We are building on the success of the team that discovered water molecules on the moon's sunlit surface.”

“We thought we could use SOFIA to find this spectral feature in other objects.”

Sofia detected water molecules in one of the largest craters in the moon's southern hemisphere.

Previous observations of both the Moon and the asteroid have detected some types of hydrogen, but have not been able to distinguish between water and its chemical cousin hydroxyl.

Scientists found that in the cubic meters of soil spread across the moon's surface, there is approximately the equivalent of a 12-ounce (355 ml) bottle of water trapped chemically bonded to minerals.

“Based on the band intensities of the spectral features, the water abundance on the asteroid matches the water abundance on the sunlit moon,” Arredondo said.

“Similarly, in asteroids, water not only binds to minerals, but also adsorbs to silicates and can become trapped or dissolved in silicate impact glass.”

Data from two fainter asteroids, Partenope and Melpomene, were too noisy to draw definitive conclusions.

The FORCAST instrument appears not to be sensitive enough to detect the spectral signature of water, if it exists.

But with these discoveries, researchers are calling on NASA/ESA/CSA's James Webb Space Telescope to take advantage of its precise optics and superior signal-to-noise ratio to investigate more targets. I am requesting you to do so.

“We conducted initial measurements of two more asteroids with Mr. Webb during Cycle 2,” said Dr. Arredondo.

“We are making another proposal to consider 30 more goals in the next cycle.”

“These studies will improve our understanding of the distribution of water in the solar system.”

of study Published in Planetary Science Journal.

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Anisia Arredondo other. 2024. Molecular H2O is detected on a nominally anhydrous asteroid. planet. Science. J 5, 37; doi: 10.3847/PSJ/ad18b8

Source: www.sci.news

China discovers new species of titanosaurus

Chinese paleontologists have discovered fossil fragments of a new genus and species of titanosaurus, a sauropod dinosaur that walked the Earth during the Cretaceous period.



rebuilding the life of Jancitan ganjouensis. Image credit: UnexpectedDinoLesson / Sci.News.

Muttjac titanum ganjoensis They lived in what is now China from 72 million years ago to 66 million years ago (late Cretaceous period).

The partial skeleton of this dinosaur was discovered in the Nanxiong Formation near Tankou Town, Ganzhou City, Jiangxi Province, China.

The specimen consists of seven cervical and anterior dorsal vertebrae, and several cervical and dorsal ribs.

Muttjac titanum ganjoensis belongs to the sauropod dinosaur group titanosauridae.

Muttjac titanum ganjoensis It is unique among Asian titanosaurids in that it has a deeply bifurcated dorsal neck and anterodorsal neural spines, and a dorsoventrally compressed dorsal neck and anterodorsal center. Lead author Jin Yu Mo of the Guangxi Zhuang Autonomous Region Natural History Museum and colleagues state in the paper. .

Muttjac titanum ganjoensis represents the second sauropod species. Nanyu Formation.

“The Late Cretaceous Nanxiong Formation is represented by an extensive succession of red mudstones, sandstones, and conglomerates,” the paleontologists wrote.

“Recent years have produced a wide variety of vertebrates, including theropods, ornithopods, crocodiles, turtles, lizards, and mammals, as well as vast numbers of dinosaur eggs.”

“There is only one species of sauropod, Ganansaurus sinensisrecorded in this area.

Team analysis points Muttjac titanum ganjoensis Within a group of deeply nested titanosaurs Rogoncosauria.

Muttjac titanum ganjoensis Display features that indicate branch locations later than Ganansaurus sinensismore specifically, Muttjac titanum ganjoensis It was recovered as Rogoncosaurus, but Ganansaurus sinensis as titanosaurs outside of a late-branching clade containing Diamantina Sauria and lithostorozia” the researchers wrote.

“As a result, Muttjac titanum ganjoensis There are no duplicate elements with Ganansaurus sinensiswe are confident. Muttjac titanum ganjoensis is a different species from Ganansaurus sinensis

The discovery of Muttjac titanum ganjoensis “This indicates the presence of both early-divergent and late-divergent titanosauroid sauropods in the Late Cretaceous Ganzhou dinosaur fauna,” the researchers added.

“This discovery also increases the diversity of titanosaurs from the Late Cretaceous of Asia.”

of the team paper It was published in the magazine historical biology.

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Mo Jin Yoo other. A new species of titanosaur sauropod excavated from the Late Cretaceous period in Jiangxi Province, southern China. historical biology, published online on September 23, 2024. doi: 10.1080/08912963.2023.2259413

Source: www.sci.news

Physicists witness real-time movement of electrons in liquid water for the first time

A research team led by physicists at Argonne National Laboratory isolated the energetic motion of electrons while “freezing” the motion of the much larger atoms they orbit in a sample of liquid water.

Shuai other. Synchronized attosecond X-ray pulse pairs (pictured here in pink and green) from an X-ray free electron laser were used to study the energetic response of electrons (gold) in liquid water on the attosecond time scale. On the other hand, hydrogen (white) and oxygen (red) atoms are “frozen” over time. Image credit: Nathan Johnson, Pacific Northwest National Laboratory.

“The radiation-induced chemical reactions we want to study are the result of targeted electronic reactions that occur on the attosecond time scale,” said lead author of the study, Professor Linda Young, a researcher at Argonne National Laboratory. said.

Professor Young and colleagues combined experiment and theory to reveal the effects of ionizing radiation from an X-ray source when it hits material in real time.

Addressing the timescales over which actions occur will provide a deeper understanding of the complex radiation-induced chemistry.

In fact, researchers originally came together to develop the tools needed to understand the effects of long-term exposure to ionizing radiation on chemicals found in nuclear waste.

“Attosecond time-resolved experiments are one of the major R&D developments in linac coherent light sources,” said study co-author Dr. Ago Marinelli, a researcher at the SLAC National Accelerator Laboratory.

“It's exciting to see these developments applied to new types of experiments and moving attosecond science in new directions.”

Scientists have developed a technique called X-ray attosecond transient absorption spectroscopy in liquids that allows them to “watch” electrons energized by X-rays move into an excited state before larger nuclei move on. “We were able to.

“In principle, we have tools that allow us to track the movement of electrons and watch newly ionized molecules form in real time,” Professor Young said.

The discovery resolves a long-standing scientific debate about whether the X-ray signals observed in previous experiments are the result of different structural shapes or motifs in the mechanics of water or hydrogen atoms.

These experiments conclusively demonstrate that these signals are not evidence of two structural motifs in the surrounding liquid water.

“Essentially, what people were seeing in previous experiments was a blur caused by the movement of hydrogen atoms,” Professor Young explained.

“By recording everything before the atoms moved, we were able to eliminate that movement.”

To make this discovery, the authors used a technique developed at SLAC to spray an ultrathin sheet of pure water across the pulse path of an X-ray pump.

“We needed a clean, flat, thin sheet of water that could focus the X-rays,” said study co-author Dr. Emily Nienhaus, a chemist at Pacific Northwest National Laboratory.

Once the X-ray data was collected, the researchers applied their knowledge of interpreting X-ray signals to recreate the signals observed at SLAC.

They modeled the response of liquid water to attosecond X-rays and verified that the observed signal was indeed confined to the attosecond timescale.

“Using the Hyak supercomputer, we developed cutting-edge computational chemistry techniques that enable detailed characterization of transient high-energy quantum states in water,” study co-authors from the University of Washington said Xiaosong Li, a researcher at Pacific Northwest National University. Laboratory.

“This methodological breakthrough represents a pivotal advance in our quantum-level understanding of ultrafast chemical transformations, with extraordinary precision and atomic-level detail.”

The team worked together to peer into the real-time movement of electrons in liquid water.

“The methodology we have developed enables the study of the origin and evolution of reactive species produced by radiation-induced processes encountered in space travel, cancer treatment, nuclear reactors, legacy waste, etc.,” Professor Young said. Stated.

The team's results were published in a magazine science.

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L. Shuai other. 2024. Attosecond Pump Attosecond Probe X-ray Spectroscopy of Liquid Water. science, published online on February 15, 2024. doi: 10.1126/science.adn6059

Source: www.sci.news

Webb uncovers massive inactive galaxy with mature stars in the ancient cosmos

The formation of galaxies through the stepwise hierarchical coassembly of baryons and cold dark matter halos is a fundamental paradigm underpinning modern astrophysics and predicts a significant decline in the number of giant galaxies in the early Universe. . Very massive quiescent galaxies have been observed 1 to 2 billion years after the Big Bang. These form between 300 million and 500 million years ago and are very limiting for theoretical models, as only some models can form massive galaxies this early. The spectrum of newly discovered quiescent galaxy ZF-UDS-7329 reveals features typical of much older stellar populations. Detailed modeling shows that the stellar population formed about 1.5 billion years ago, when dark matter halos with sufficient host mass had not yet assembled in the standard scenario. This observation may indicate the existence of an undetected early population of galaxies and potentially large gaps in our understanding of the nature of early stellar populations, galaxy formation, and/or dark matter.



This web image shows ZF-UDS-7329, a rare massive galaxy that formed very early in the universe. Image credit: Glazebrook other., doi: 10.1038/s41586-024-07191-9.

Galaxy formation is a fundamental paradigm underpinning modern astrophysics, and a significant decrease in the number of massive galaxies in the early universe is predicted.

Very large quiescent galaxies have been observed 1 to 2 billion years after the Big Bang, casting doubt on previous theoretical models.

Professor Carl Glazebrook, from Swinburne University of Technology, said: “We have been tracking this galaxy for seven years, observing it for hours with two of the largest telescopes on Earth to find out its age.” Ta.

“But it was too red and too faint to be measured. In the end, we had to go outside Earth and use the web to see its properties.”

“This was truly a team effort, from the infrared sky survey that began in 2010 to identifying this galaxy as an anomaly, and the many hours spent with the Keck Telescope and the Very Large Telescope. But we couldn’t confirm it, and finally, last year, we spent a lot of effort trying to figure out how to process the web data and analyze this spectrum.”

“We are now beyond the realm of possibility to have identified the oldest giant stationary monster deep in the universe,” said Dr Temmiya Nanayakkara, an astronomer at Swinburne University of Technology.

“This pushes the limits of our current understanding of how galaxies form and evolve.”

“The key question now is how do stars form so quickly, so early in the universe, and how do they form at a time when other parts of the universe are forming stars? “What kind of mysterious mechanism could cause it to suddenly stop forming?”

“Galaxy formation is determined primarily by how dark matter is concentrated.”

“The presence of these extremely massive galaxies in the early universe poses significant challenges to our standard model of cosmology.”

“This is because dark matter structures large enough to accommodate these massive galaxies are unlikely to have formed yet.”

“More observations are needed to help us understand how common these galaxies are and how massive they really are.”

“This could open new doors in our understanding of the physics of dark matter,” Professor Glazebrook said.

“Webb continues to discover evidence that massive galaxies form early.”

“This result sets a new record for this phenomenon. It’s very impressive, but it’s just one object. But we want to discover more. If I If we were to do this, it would seriously disrupt our understanding of galaxy formation.”

This finding is reported in the following article: paper Published in this week’s magazine Nature.

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K. Glazebrook other. A huge galaxy that formed stars at z ~ 11. Nature, published online on February 14, 2024. doi: 10.1038/s41586-024-07191-9

Source: www.sci.news

Security Concerns Raised by the Realism of OpenAI’s Sora Video Generator

AI program Sora generated this video featuring an android based on text prompts

Sora/OpenAI

OpenAI has announced a program called Sora, a state-of-the-art artificial intelligence system that can turn text descriptions into photo-realistic videos. This video generation model has added to excitement over advances in AI technology, along with growing concerns about how synthetic deepfake videos will exacerbate misinformation and disinformation during a critical election year around the world. I am.

Sora AI models can currently create videos up to 60 seconds using text instructions alone or a combination of text and images. One demonstration video begins with a text prompt describing a “stylish woman walking down a Tokyo street filled with warmly glowing neon lights and animated city signs.” Other examples include more fantastical scenarios such as dogs frolicking in the snow, vehicles driving down the road, and sharks swimming through the air between city skyscrapers.

“Like other technologies in generative AI, there is no reason to believe that text-to-video conversion will not continue to advance rapidly. We are increasingly approaching a time when it will be difficult to tell the fake from the real.” Honey Farid at the University of California, Berkeley. “Combining this technology with AI-powered voice cloning could open up entirely new ground in terms of creating deepfakes of things people say and do that they have never actually done.”

Sora is based on some of OpenAI's existing technologies, including the image generator DALL-E and the GPT large language model. Although his text-to-video AI models lag somewhat behind other technologies in terms of realism and accessibility, Sora's demonstrations are “orders of magnitude more believable and cartoon-like” than previous ones. “It's less sticky,” he said. Rachel TobackHe is the co-founder of SocialProof Security, a white hat hacking organization focused on social engineering.

To achieve this higher level of realism, Sora combines two different AI approaches. The first is a diffusion model similar to those used in AI image generators such as DALL-E. These models learn to gradually transform randomized image pixels into a consistent image. The second of his AI techniques is called “Transformer Architecture” and is used to contextualize and stitch together continuous data. For example, large-scale language models use transformer architectures to assemble words into commonly understandable sentences. In this case, OpenAI split the video clip into visual “space-time patches” that Sora's transformer architecture could process.

Sora's video still contains many mistakes, such as a walking person's left and right feet swapping positions, a chair floating randomly in the air, and a chewed cookie magically leaving no bite marks. contained. still, jim fanThe senior research scientist at NVIDIA praised Sora on social media platform X as a “data-driven physics engine” that can simulate the world.

The fact that Sola's video still exhibits some strange glitches when depicting complex scenes with lots of movement suggests that such deepfake videos are still detectable for now. There is, he says. Arvind Narayanan at Princeton University. But he also warned that in the long term, “we need to find other ways to adapt as a society.”

OpenAI has been holding off on making Sora publicly available while it conducts “red team” exercises in which experts attempt to break safeguards in AI models to assess Sora's potential for abuse. An OpenAI spokesperson said the select group currently testing Sora are “experts in areas such as misinformation, hateful content, and bias.”

This test is very important. Because synthetic videos allow malicious actors to generate fake footage, for example, to harass someone or sway a political election. Misinformation and disinformation fueled by AI-generated deepfakes ranks as a major concern For leaders as well as in academia, business, government, and other fields. For AI experts.

“Sora is fully capable of creating videos that have the potential to deceive the public,” Tobac said. “Videos don't have to be perfect to be trustworthy, as many people still don't understand that videos can be manipulated as easily as photos.”

Toback said AI companies will need to work with social media networks and governments to combat the massive misinformation and disinformation that could arise after Sora is released to the public. Defenses could include implementing unique identifiers, or “watermarks,” for AI-generated content.

When asked if OpenAI has plans to make Sora more widely available in 2024, an OpenAI spokesperson said the company “will make Sora more widely available in OpenAI's products.” We are taking important safety measures.” For example, the company already uses automated processes aimed at preventing commercial AI models from producing extreme violence, sexual content, hateful images, and depictions of real politicians and celebrities. .With more people than ever before Participate in elections this yearthese safety measures are extremely important.

topic:

  • artificial intelligence/
  • video

Source: www.newscientist.com

Research: Daily consumption of 100% orange juice reduces blood sugar levels compared to orange drink

A new study from Toronto Metropolitan University says 100% orange juice and sugar-sweetened beverages are not equivalent when it comes to their effects on food intake and blood sugar response, and should not be placed in the same category when making beverage decisions.



Consuming 100% orange juice before a meal reduces food intake at the next meal and lowers daily blood glucose concentrations in healthy, normal weight adults when compared to orange drink.

The World Health Organization suggests reducing free sugar intake to no more than 10% of daily energy intake to reduce the risk of unhealthy weight and tooth decay.

Consistent with these recommendations, some national dietary guidelines recommend reducing sugar intake from all sources.

However, these recommendations do not differentiate between sources of free sugars and are primarily based on data from observational studies, so the physiological mechanisms underlying the observed effects cannot be readily determined.

“Our findings highlight the importance of considering the source of sugar when considering overall health effects,” said Dr. Nick Bellissimo of Toronto Metropolitan University, senior author of the study. I am emphasizing that.”

The randomized, repeated measures study included 36 adult men and women with normal BMI levels who received 1 cup of 100% orange juice, orange flavored, 2 hours after a breakfast consisting of cereal, 2% milk, and 2% milk. Ingested sugar-sweetened beverages and water. Breakfast bar.

Blood sugar responses, average appetite, and subjective emotions were measured every 15 minutes for 60 minutes in 34 participants.

Glycemic responses and energy intake for the rest of the day were measured in 31 participants using continuous blood glucose monitors and food records.

Subjective sweetness and pleasantness were measured immediately after ingesting the test beverage.

Glycemic responses, average appetite, and subjective emotions were measured every 15 minutes for 60 minutes.

Food intake was measured 60 minutes after the pizza lunch.

Blood sugar levels were lower with 100% orange juice than with orange drink at 15, 30, and 45 minutes, but not after 60 minutes.

Blood sugar levels for the rest of the day were lower after drinking 100% orange juice compared to drinking orange or water.

The findings also showed that food intake at lunch and throughout the day was lower after consuming 100% orange juice compared to consuming orange drink.

Participants also had higher subjective comfort measures and enjoyed 100% orange juice more compared to orange beverages and water.

Using 100% orange juice instead of sugary drinks may reduce your total daily calorie intake and help regulate blood sugar levels.

100% orange juice contains flavonoids such as hesperidin, which can affect sugar absorption by slowing glucose transport, causing a delayed blood sugar response.

Consumption of 100% orange juice is associated with increased flavonoid intake, decreased added sugar, and higher quality diet.

The researchers said, “Consumption of 100% orange juice as a preload resulted in higher caloric compensation, lower total daily energy intake, and lower blood glucose concentrations compared to orange beverages.”

“Future longitudinal studies are needed to assess whether the habit of replacing sugar-sweetened beverages with 100% orange juice contributes to a healthier body weight and improved glycemic control.”

of paper It was published in the magazine nutrients.

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Stephanie Robayo other. 2024. Effects of her 100% orange juice and moderate sugar-sweetened beverages on subjective appetite, food intake, and glycemic responses in adults. nutrients 16 (2): 242; doi: 10.3390/nu16020242

Source: www.sci.news

Starch-based super thickeners lower calorie and carbohydrate content in food

Starch is a component of wheat flour and is used as a thickening agent in cooking.

Victor Fischer/Alamy

Making small sheets or cages from starch particles turns them into super-thickeners, which can reduce the calorie content of food.

Starches are often added to foods such as soups to thicken them, but this increases their calorie and carbohydrate content. now, lee peiron Researchers at Cornell University in New York have discovered that by arranging starch particles into special shapes, they can reduce the amount of starch in foods without sacrificing texture.

Starch particles expand when heated, which thickens the food. This means that the particles get stuck together and there is less room for the liquid components of the dish to flow freely. The researchers wondered if they could recreate this effect while reducing the amount needed by hollowing out starch blocks. “But you can't carve starch grains like pumpkins,” says Lee.

Instead, he and his colleagues devised a method that uses starch particles extracted from amaranth grains and assembles them into three-dimensional shapes by mixing them with water and oil. Starch particles were placed around the oil droplets, and the researchers used a combination of heating and freeze-drying to remove the two liquids. This left only starchy structures, some shaped like cages with a hollow center, others like sheets stacked on top of each other so that the liquid was trapped between them.

The research team discovered that these starch structures are so good as thickeners that they can halve the amount of starch typically needed to thicken foods.

Fan Zhu Researchers at the University of Auckland in New Zealand say the use of these granules as building blocks for a new class of hollow starch structures is so innovative that starches could become a big part of future food design. It has said. However, Zhu said amaranth starch is expensive and difficult to source in large quantities, so it would be advantageous to apply the new method to more affordable and abundant starches, such as starch made from corn. says. “And more research is needed into what happens when you put these kinds of structures in your mouth,” he says.

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Source: www.newscientist.com

Container Ship Trials New System to Capture Its Own CO2 Emissions

Approximately 3% of all carbon emissions come from shipping

green oak/shutterstock

A container ship with a total length of 240 meters. sounion trader recently completed testing its onboard carbon capture system while cruising around the Persian Gulf. The ship has space to hold tons of carbon dioxide, joining a small but growing number of ships seeking to reduce their impact on climate change by capturing and storing carbon dioxide emissions onboard. is difficult to find.

“We're miniaturizing systems that were designed for huge power plants,” he says. Louja Wen Seabound, a UK-based startup that is helping test run Sounion Trader.

Shipping accounts for approximately 3% of global CO2 emissions. To reduce it, shippers are using cleaner fuels, painting their hulls with foam to improve fuel efficiency, and even going back to sail. However, short-term options for achieving the industry's commitment to net-zero emissions by 2050 are limited.

Another possibility is to capture ship emissions. keep on board, but faces major obstacles. One is to provide energy to recharge the chemical adsorbents used to absorb CO2. tristan smith Researchers at University College London say some existing systems increase fuel use by a third just to capture half of the CO2 emissions.

The system, and the carbon it captures, also takes up space on the ship that would normally be used for valuable cargo. “Space is an issue,” he says. jasper ross At the Dutch research institute TNO. “Especially when you're talking about long voyages.” About three tonnes of CO2 is produced for every tonne of fuel burned. George Malupas At the Cyprus Marine and Maritime Institute. Once captured and stored, the added mass can affect the ship's stability and reduce fuel efficiency.

Wen said Seabound's small-scale tests captured about 1 tonne of CO2 per day. Although this is only a fraction of the ship's overall emissions, a full-scale system could capture as much as 95 percent of the ship's CO2, she says.

To save energy, Seabound moves some of its processes onshore. On ships, the exhaust air passes through a calcium oxide adsorbent and reacts with CO2 to form solid calcium carbonate pebbles. The company will then wait to refill the adsorbent until the pebbles are offloaded at the port for permanent storage. The tradeoff is space. Seabound's approach means the ship must carry tanks of sorbent with every ton of her CO2 captured. Still, Wen said the company aims to retrofit 1,000 ships for carbon capture by 2030.

Dutch company Value Maritime has taken a similar approach, using liquid amine adsorbents to capture carbon dioxide and refill it offshore. Yvette van der Sonmen Value Maritime says 26 ships are currently using its system in parallel with existing sulfur pollution scrubbers to capture up to 40 percent of CO2 in their exhaust, but the process is still being managed by third parties. Not certified by She said the company sells some of the captured CO2 to greenhouses to use as fertilizer for plants, but much of it remains in tanks at the port.

Such systems may now look attractive for reducing emissions, Smith says. However, the rapid scale-up of cleaner transportation fuels could quickly make them obsolete unless very high recovery rates can be achieved at sufficiently low costs. “The shipping industry currently has a very short window to decarbonize, because it has been very slow to start decarbonizing,” he says.

Source: www.newscientist.com

First genetically modified banana approved by regulatory authorities

Most banana plants are vulnerable to the fungal disease TR4

Ann Clark/iStockphoto/Getty Images

For the first time, genetically modified bananas have been approved for cultivation on farms. Regulators in Australia and New Zealand have given the green light to a Cavendish banana variety engineered to be resistant to a devastating fungal disease that is widespread in many countries around the world.

Australian Gene Technology Regulatory Authority issues license Allow commercial growth of modified bananas February 12th.

16 February, Australian and New Zealand Food Standards Approved as food, conclude that it is as safe and nutritious as traditional bananas. The food ministers of Australia and New Zealand can request a review of the decision within the next 60 days. Otherwise, approval is final.

The first banana widely eaten in Western countries was a variety called Gros Michel. However, by the 1950s, fusarium A fungal strain called Tropical Race 1 (TR1), which causes Panama disease, has forced farmers to switch to Cavendish bananas. Although reportedly not as tasty as Gros Michel, Cavendish is highly resistant to TR1.

Now, another stock fusariumIt is called TR4 and is popular all over the world. It can kill many varieties, including Cavendish.

team led by james dale Australia's Queensland University of Technology has created a resistant strain of banana called QCAV-4 by adding genes from wild bananas.

The decision is “a very important step towards creating a global Cavendish Banana safety net with TR4, which is already impacting many parts of the world,” Dale said. statement.

Quarantine measures currently limit the spread of TR4 in Australia, with only a small number of cases occurring each year. Therefore, there are currently no plans to grow QCAV-4 bananas on a large scale or sell them to consumers.

However, other countries where TR4 is more of a problem may decide to adopt genetically modified bananas. Dale's team now plans to use CRISPR gene editing QCAV-4 to make bananas resistant to another major fungal disease called black sigatoka which could mean it's even more attractive to farmers.

A Kenyan research team has already used CRISPR to create a strain of the Gonja Manjaya variety that is free of banana streak virus, a pathogen that integrates into the banana genome.

Genetically modified (GM) crops are now widely grown in many countries around the world, but in some regions, such as the United Kingdom and the European Union, very few crops are approved for cultivation by farmers.

in australia, Only four genetically modified crops have been approved so far. These are safflower, which contains high levels of oleic acid in its oil, and herbicide-resistant rapeseed (canola), Indian mustard, and cotton varieties.

However, Australia and New Zealand have approved Wider range of GM crops and edible products Similar to the situation in the UK and the EU.

topic:

  • Genetic recombination/
  • Eating and drinking

Source: www.newscientist.com

Researchers successfully decode the genome of the elusive night parrot

CSIRO researchers first genome of night parrot (Pezoporus occidentalis)one of the rarest and most elusive birds in the world.

night parrot (Pezoporus occidentalis). Image credit: Arianna Urso / Western Australian Museum.

The night parrot is a relatively small, short-tailed parrot species endemic to Australia.

This species is also known as the porcupine parrot, nocturnal ground parakeet, midnight parrot, solitaire, spinifex parrot, and nocturnal parakeet. first explained It was published in 1861 by British ornithologist John Gould.

The night parrot is one of the most elusive and mysterious birds in the world, with no confirmed sightings from 1912 to 1979.

They were once widespread in the arid regions of Australia, but their numbers have declined due to environmental changes such as predation by cats and foxes.

It is now known only from localized areas in south-west Queensland and Western Australia.

“Dozens of scientific specimens were collected in the 19th century, with one specimen collected in 1912. A specimen was then discovered in south-west Queensland in 1990,” says the CSIRO Australian National Wildlife Collection. said Dr. Leo Joseph, Director.

“A live bird was reported from the same area in 2013, and a live parrot was finally captured and tagged in 2015.”

“This genome will allow us to explore the genetic basis of why parrots are nocturnal, a trait that is very rare in parrots,” he added.

“We investigate functions such as navigation, sense of smell, beak shape, and suboptimal night vision.”

“Researchers will also be able to perform statistical analysis of this individual's genome to estimate the historical population size of Australia's night parrot.”

“We can now compare this annotated genome with other closely related parrot species, revealing the reasons behind its rarity and limited distribution compared to many closely related species. You can.”

Dr Joseph and his colleagues sequenced the armyworm genome using tissue obtained from specimens found in the Pilbara region.

“Access to high-throughput sequencing technology through CSIRO's Applied Genomics Initiative is accelerating genomics research in Australia,” said Dr Gunjun Pandey, CSIRO Environment Directorate Night Parrot Genomics Project Leader.

“We can now generate very high-quality genomes from very small tissue samples, as small as an ant's head or a single mosquito.”

“This level of quality and detail was not possible even five years ago.”

“Genetic data can be used to maximize diversity in conservation programs, so species are resilient and have the best chance of long-term survival.”

The night parrot genome is an exciting scientific resource for understanding more about this bird, but protecting this species from cats, foxes, fire, and habitat loss is also important for its conservation.

“The night parrot genome will open up many opportunities for further research that will help protect this species,” Dr. Pandey said.

“This will allow scientists to develop a plan to save the night parrot, with the ultimate goal of sequencing and publishing the genome.”

Source: www.sci.news

Kadena SpireKey Teams Up with WebAuthn for Smooth Web3 Interactions: Blockchain News, Opinion, TV, Jobs

New York City, NY, February 16, 2024, Chainwire

Kadena SpireKey is a human-friendly and secure way to seamlessly interact with any application by eliminating complex signing processes.

Kadena Spire Key

“Unlike today’s complex Web3 wallets that require you to remember every wallet you’ve ever created, Kadena’s SpireKey uses WebAuthn, a technology developed by Google and Apple over the past 20 years, to Make digital assets securely available to anyone directly on their phone or computer. It’s as easy as receiving a prompt on your mobile device and providing your fingerprint as a signature. Family Holiday Dinner Even your uncle who asks you about cryptocurrencies every time can do it. Kadena makes the application accessible to everyone, whether you’re an experienced “degener” or someone new to blockchain. said Mike Herron, CMO of Kadena.

SpireKey creates seamless interactions between humans and technology, delivering Web2 experiences with Web3 innovations. SpireKey allows users to sign transactions and their Web3 applications, just like it works with Apple Pay and Google Pay. However, it can be run directly on the user’s device without opening multiple windows or copying and pasting key pairs, eliminating potential vulnerabilities found in traditional wallets.

Enhanced security with built-in multisig

“Multi-sig signatures built into Kadena enable an additional layer of security for SpireKey, which can only be provided through our proprietary language, Pact. With multi-signatures, SpireKey allows For example, if you’re transferring more than $10,000, you can set a parameter to require signatures from three different devices: your phone, your laptop, and your cold storage wallet. Because a malicious attacker would need access to three devices, multisig functionality reduces the risk of your account being compromised. This reduces the risk of alternative attack vectors and increases overall security. “Stuart Popejoy, co-founder and CEO of Kadena, said:

SpireKey represents how Kadena thinks about the level of usability that Web3 technology should have. At the heart of SpireKey is connecting humans and allowing them to interact with blockchain. SpireKey believes that by showing real-life examples, she can get everyone equally interested in how Spirekey can impact the world beyond her Web3. Masu.

About Kadena

Kadena is a blockchain technology protocol founded in 2017 by Stuart Popejoy and Will Martino. Kadena is the industry’s only scalable layer 1 proof-of-work (PoW) blockchain. This scalability allows Kadena to provide infrastructure-grade performance for any blockchain project. Along with Kadena’s proprietary smart contract language, Pact, Kadena’s platform provides the world with the tools and environment to turn ideas and ambitions into reality. Founded by Stuart Popejoy and William Martino, who developed JPMorgan’s first blockchain and headed the SEC’s Crypto Committee, Kadena aims to enable mass adoption of true blockchain. .

For more information, users can follow Kadena’s information. twitter | telegram | discord | YouTube

contact

Kadena Press
press@kadena.io

Source: the-blockchain.com