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#oxygen

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Public
Mark

Life on the Moon?

#Soil on #Moon might sustain life

Researchers from University of Hong Kong developed technology to extract #water from #lunar soil & use it to convert carbon dioxide into #oxygen & #chemical #fuel

The #research could “potentially open new doors for future deep space exploration” because it could mitigate the expensive costs needed to bring essential resources such as water to the Moon.

euronews.com/next/2025/07/20/l

Life on the Moon? Lunar soil could help humans live on the Moon, study finds
euronews · Soil on the Moon could sustain human life, study findsResearchers from the Chinese University of Hong Kong developed a technology that can extract water from the soil on the Moon and convert it into oxygen and chemical fuel.
#space#astronauts#ScienceMatters
Public
DoomsdaysCW

#Jellyfish attack #NuclearPowerPlant. Again.

By Susan D’Agostino | October 28, 2021

"#Scotland’s only working nuclear power plant at #Torness shut down in an emergency procedure when jellyfish clogged the sea water-cooling intake pipes at the plant, according to the Scotland Herald this week. Without access to cool water, a nuclear power plant risks overheating. The intake pipes can also be damaged, which disrupts power generation. And ocean life that gets sucked into a power plant’s intake pipes risks death.

[...]

"The clash between gelatinous jellyfish and hulking nuclear power plants has a long history. These spineless, brainless, bloodless creatures shut down the Torness nuclear power plant in 2011 at a cost of approximately $1.5 million per day, according to one estimate. Swarms of these invertebrates have also been responsible for nuclear power plant shutdowns in Israel, Japan, the United States, the #Philippines, #SouthKorea, and Sweden.

"Humans have unwittingly nurtured the adversarial relationship between jellyfish and nuclear power plants. That is, human-induced #ClimateChange has raised ocean water temperatures, setting conditions for larger-than-usual jellyfish populations. Further, the relatively warm water near nuclear power plant discharge outlets may attract jellyfish swarms, according to one study. Also, #pollution has lowered #oxygen levels in sea water, which jellyfish tolerate more than other marine animals, leading to their proliferation.

"Some look at jellyfish and see elegant ballerinas of the sea, while others view them as pests. Either way, they are nothing if not resilient. Jellyfish are 95 percent water, drift in topical waters and the Arctic Ocean, and thrive in the ocean’s bottom as well as on its surface. Nuclear power plant operators might take note: Older-than-dinosaur jellyfish are likely here to stay."

Full article:
thebulletin.org/2021/10/jellyf

#OceansAreLife #NuclearPowerPlants
#NoNukes #NoNukesForAI #RethinkNotRestart

Bulletin of the Atomic Scientists · Jellyfish attack nuclear power plant. Again.Scotland’s only working nuclear power plant at Torness shut down in an emergency procedure when jellyfish clogged the sea water-cooling intake pipes at the plant. To protect marine life and avert nuclear disasters, scientists are investigating the use of drones to provide estimates of jellyfish locations, amounts, and density.
Public
Fell

Oh my goodness! You can enable login and logout sounds in KDE Plasma! 🎶

The Oxygen sound theme has such a nice jingle, too. It reminds me of the good old days. I'm keeping that.

You can enable it in Settings → Apps & Windows → Notifications → Login → Play a sound (See screenshot)

You can set a custom sound file, but a file from your current sound theme should already be default if there is one.

Screenshot of KDE Plasma Settings Menu → Apps & Windows → Notifications → Login → Play a sound
#Linux#DesktopLinux#KDE
Public
Niels de Winter

Check out our latest #preprint in which we use a combination of #clumped and #oxygen #isotope measurements to reconstruct extreme summer temperatures experienced by #fossil #rudist bivalves from the Late #Cretaceous in Oman. All feedback is welcome!
egusphere.copernicus.org/prepr

egusphere.copernicus.orgLiving on the edge: Response of rudist bivalves (Hippuritida) to hot and highly seasonal climate in the low-latitude Saiwan site, OmanAbstract. Earth’s climate history serves as a natural laboratory for testing the effect of warm climates on the biosphere. The Cretaceous period featured a prolonged greenhouse climate characterized by higher-than-modern atmospheric CO2 concentrations and mostly ice-free poles. In such a climate, shallow seas in low latitudes probably became very hot, especially during the summers. At the same time, life seems to have thrived there in reef-like ecosystems built by rudists, an extinct group of bivalve molluscs. To test the seasonal temperature variability in this greenhouse period, and whether temperature extremes exceed the maximum tolerable temperatures of modern marine molluscs, we discuss a detailed sclerochronological (incrementally sampled) dataset of seasonal scale variability in shell chemistry from fossil rudist (Torreites sanchezi and Vaccinites vesiculosus) and oyster (Oscillopha figari) shells from the late Campanian (75-million-year-old) low latitude (3° S paleolatitude) Saiwan site in present-day Oman. We combine trace element data and microscopy to screen fossil shells for diagenesis, before sampling well-preserved sections of a Torreites sanchezi rudist specimen for clumped isotope analysis. Based on this specimen alone, we identify a strong seasonal variability in temperature of 19.2 ± 3.8 °C to 44.2 ± 4.0 °C in the seawater at the Saiwan site. The oxygen isotopic composition of the seawater (δ18Osw) varied from -4.62 ± 0.86 ‰ VSMOW in winter to +0.86 ± 1.6 ‰ VSMOW in summer. We use this information in combination with age modelling to infer temperature seasonality from incrementally sampled oxygen isotope profiles sourced from the literature, sampling multiple shells and species in the assemblage. We find that, on average, the Saiwan seawater experienced strong seasonal fluctuations in monthly temperature (18.7 ± 3.8 to 42.6 ± 4.0 °C seasonal range) and water isotopic composition (-4.33 ± 0.86 to 0.59 ± 1.03 ‰ VSMOW). The latter would strongly bias the interpretation of stable oxygen isotopes in shell carbonate without independent control on either temperature or seawater composition. Combining our seasonal temperature estimates with shell chronologies based on seasonal cyclicity in stable isotope records and daily variability in trace element data, we show that T. sanchezi rudists record temperatures during the hottest periods of the year as well as during the winters, which were characterized by cooler temperatures and enhanced influx of freshwater. Both O. figari and V. vesiculosus plausibly stopped growing during these seasonal extremes. This study aims to demonstrate how high-resolution geochemical records through fossil mollusc shells can shed light on the variability in past warm ecosystems and open the discussion about the limits of life in the shallow marine realm during greenhouse climates. Future work should apply the clumped isotope paleothermometer on incrementally sampled bio-archives to explore the upper-temperature limits experienced by calcifiers in different environments throughout geological history.
Public
Khurram Wadee ✅

Why a new #zero-carbon #UK #steel plant offers hope and a headache | Steel industry | The Guardian

The problem with making steel using a #BlastFurnace is that it requires very high temperatures and #CokingCoal to #reduce the #Oxygen content as it is made to bond to #Carbon instead. This produces #CarbonMonoxide and then #CarbonDioxide.

theguardian.com/business/2025/

The Guardian · Why a new zero-carbon UK steel plant offers hope and a headachePar Jasper Jolly
#GreenhouseGases#DRI#DirectReducedIron
Suite du fil
Public
Dr. John Barentine FRAS

There is more about this phenomenon here: spaceweatherarchive.com/2023/1 "During the burn, the engine releases about 400lbs of exhaust gasses, mostly water and carbon dioxide. All this happens at ~300km altitude, near the peak of the #ionosphere, so a significant hole is made."

My colleague Stephen Hummel (McDonald Observatory) obtained this spectrum of one of the 'ionospheric hole' glows. It's essentially an induced #aurora with the strongest optical emission in the 1D → 3P state of atomic #oxygen that emits at 630 nm.

Optical-wavelength spectrum of the ionospheric hole made by a SpaceX Falcon 9 rocket on 3 November 2023
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Flipboard Culture Desk

Earth's rotation has been slowing down ever since its formation 4.5 billion years ago, giving us longer days as a result. We may not notice the slowing, but over eons, it can create significant changes, like the oxygenation of Earth's atmosphere, for example. @ScienceAlert explains:

flip.it/3ZHF6_

ScienceAlert · Earth's Rotation Is Slowing Down, And It Could Explain Why We Have OxygenEver since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have gotten progressively longer as a result.
#Science#Earth#Oxygen
Public
DoomsdaysCW

#Oxygen produced in the #DeepSea raises questions about extraterrestrial life

"Over 12,000 feet below the surface of the sea, in a region of the Pacific Ocean known as the Clarion-Clipperton Zone (#CCZ), million-year-old rocks cover the seafloor. These rocks may seem lifeless, but nestled between the nooks and crannies on their surfaces, tiny sea creatures and microbes make their home, many uniquely adapted to life in the dark.

"These deep-sea rocks, called polymetallic #nodules, don't only host a surprising number of sea critters. A team of scientists that includes Boston University experts has discovered they also produce oxygen on the seafloor.

"The discovery is a surprise considering oxygen is typically created by plants and organisms with help from the sun -- not by rocks on the ocean floor. About half of all the oxygen we breathe is made near the surface of the ocean by phytoplankton that photosynthesize just like land-dwelling plants. Since the sun is needed to carry out photosynthesis, finding oxygen production at the bottom of the sea, where there is no light, flips conventional wisdom on its head. It was so unexpected that scientists involved in the study first thought it was a mistake.

"This was really weird, because no one had ever seen it before," says Jeffrey Marlow, a BU College of Arts & Sciences assistant professor of biology and coauthor on the study, which was published in Nature Geoscience.

As an expert in microbes that live in the most extreme habitats on Earth -- like hardened lava and deep-sea hydrothermal vents -- Marlow initially suspected that microbial activity could be responsible for making oxygen. The research team used deep-sea chambers that land on the seafloor and enclose the seawater, sediment, polymetallic nodules, and living organisms. They then measured how oxygen levels changed in the chambers over 48 hours. If there are plentiful organisms breathing oxygen, then the levels would normally decline, depending on how much animal activity is present in the chamber. But in this case, oxygen was increasing.

" 'We did a lot of troubleshooting and found that the oxygen levels increased many more times following that initial measurement,' Marlow says. 'So we're now convinced it's a real signal.'

"He and his colleagues were aboard a research vessel tasked with learning more about the ecology of the CCZ, which spans 1.7 million square miles between #Hawaii and #Mexico, for an environmental survey sponsored by The Metals Company, a deep-sea mining firm interested in extracting the rocks en masse for metals. After running experiments on board the vessel, Marlow and the team, led by Andrew Sweetman at the Scottish Association for Marine Science, concluded the phenomenon isn't primarily caused by microbial activity, despite the abundance of many different types of microbes both on and inside the rocks.

"#PolymetallicNodules are made of rare metals, including #copper, nickel, cobalt, iron, and manganese, which is why companies are interested in mining them. It turns out, according to the study, that those densely packed metals are likely triggering "seawater electrolysis." This means that metal ions in the rock layers are distributed unevenly, creating a separation of electrical charges -- just like what happens inside of a battery. This phenomenon creates enough energy to split water molecules into oxygen and hydrogen. They named this "dark oxygen," since it's oxygen made with no sunlight. What remains unclear is the exact mechanism of how this happens, if oxygen levels vary across the CCZ, and if the oxygen plays a significant role in sustaining the local ecosystem."

sciencedaily.com/releases/2024

#LeaveItInTheOcean#DeepSeaMining#NoDeepSeaMining
A répondu dans un fil de discussion
Public
Beurt

next.ink/180367/la-france-reco

@mathildesaliou
Tant de bons souvenirs: passer des nuits à tenter de faire des choses qui ressemblaient aux Maîtres #TCB, #TheLostBoys, #Oxygen, etc. (Oui, bien sûr #AtariSTRulez)

Les #demos, Patrimoine immatériel ! Diantre !

Quelle grande fierté d'être dans un coin de cette image :

askdesign.free.fr/public/

🤩🤩🤩

Next · La France reconnait désormais la démoscène comme patrimoine culturel - NextNée avec l’informatique moderne, la démoscène est désormais inscrite à l’Inventaire national du Patrimoine culturel immatériel français. Un premier pas vers sa reconnaissance par l’Unesco, qui récompense plus de cinq années d’efforts menés, notamment par l’association MO5.com. Bien avant l’IA générative, il y avait les démos : des bouts de code informatique qui, une fois […]
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Dragofix

Oxygen is running low in inland waters—and human activities are to blame phys.org/news/2025-04-oxygen-i

Oxygen is running low in inland waters, and humans are to blame sciencedaily.com/releases/2025

phys.orgOxygen is running low in inland waters—and human activities are to blameRivers, streams, lakes, and reservoirs aren't just scenic parts of our landscape—they're also vital engines for life on Earth. These inland waters "breathe" oxygen, just like we do. But a new study led by Utrecht University researchers shows that we've been suffocating them during the last century, an era also known as the Anthropocene. The research, published today in Science Advances, reveals that the way oxygen is produced and used in inland waters has dramatically changed since 1900. The culprit? Human activities.
#environment#water#waters
Public
michael

3-Apr-2025
#MolecularClock analysis shows #bacteria used #oxygen long before widespread photosynthesis
Scientists use the #GreatOxidationEvent and how organisms adapted to it to map bacterial #evolution

eurekalert.org/news-releases/1 #science #astrobiology

EurekAlert!Molecular clock analysis shows bacteria used oxygen long before widespread photosynthesisIn a new study published in Science, researchers from the Model-Based Evolutionary Genomics Unit at the Okinawa Institute of Science and Technology (OIST) and their international collaborators have constructed a detailed timeline for bacterial evolution and oxygen adaptation. Their findings suggest some bacteria could use trace oxygen long before evolving the ability to produce it through photosynthesis. 
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