Tag

Carbon Dioxide

All articles tagged with #carbon dioxide

science14 days ago•21 min saved

New electrochemical method converts CO2 and nitrite into high-value arylglycines

Researchers have developed a two-step electrochemical process to synthesize arylglycines, a class of valuable unnatural amino acids, using carbon dioxide, nitrite, and aromatic aldehydes as feedstocks. The method replaces traditional toxic reagents and harsh conditions with a Lewis acid-assisted electrocatalytic approach. Using benzaldehyde as a model substrate, the process achieved 84% conversion and 81% Faradaic efficiency for phenylglycine. The technique involves the electrochemical reduction of nitrite to hydroxylamine, which condenses with aldehydes to form oximes, followed by electroreductive carboxylation with CO2. This approach offers a sustainable alternative for producing compounds essential in medicinal chemistry and peptide natural products.

via Nature|

#amino-acids #carbon-dioxide #electrosynthesis

astronomy25 days ago•142 min saved

Martian CO2 breakthrough could fuel rockets on the go

Researchers demonstrated a nitrogen-doped copper catalyst that can convert Mars’ CO2 into nearly pure methane via electrochemical reduction, potentially enabling in-situ propellant production for Mars missions and reducing the need to haul fuel from Earth; while promising for ISRU, challenges remain in avoiding byproducts and managing carbon-cycle implications for net-zero goals.

via Space|

#astronomy #carbon-dioxide #electrochemical-reduction

science25 days ago•14 min saved

CO2-Soaked Lake Mats Trigger Rapid Zebra Mussel Die-Off in Michigan

Michigan scientists tested heavy lakebed mats with carbon dioxide pumped beneath them in Loon Lake. After five days, over 80% of caged zebra mussels died under the CO2 mats (versus about 20% under ordinary mats and 13% in untreated plots), with CO2 concentrations near 200 mg/L and sustained low pH. The approach may selectively target zebra mussels—native unionid mussels showed greater tolerance—but it also reduced overall benthic invertebrate numbers and could disrupt habitat. While promising for a faster, reusable control, researchers caution that refinement and broader testing are needed before widescale deployment.

via The Times of India|

#benthic-mats #carbon-dioxide #freshwater-ecology

space1 month ago•10 min saved

Mars Winter: When CO2 Locks the Air into Ice at the Poles

Winter on Mars freezes CO2 from the thin air into a growing polar cap and even dry-ice snow; the cap can store up to about 16% of the atmosphere, causing a global pressure swing of roughly 25%. Temperatures can plunge to around -130°C, with wide local variation by latitude, altitude and surface heat properties. In spring, CO2 sublimates back to gas and pressure rises again as the cap recedes. The northern and southern winters differ due to orbital timing and topography, but the cycle is one integrated CO2 exchange between air and ground.

via Space Daily|

#atmosphere #carbon-dioxide #mars

health1 month ago•14 min saved

Lost Weight's Real Exit: Most of It Leaves Through Your Breath

Weight loss mainly happens as the body taps energy stores, converting fat into carbon dioxide and water. About 84% of fat is exhaled as CO2 through the lungs, while roughly 16% becomes water excreted via sweat and urine. Exercise and diet create the calorie deficit that drives this fat breakdown; understanding this science helps people avoid gimmicks and focus on sustainable health habits.

via HuffPost|

#carbon-dioxide #fat-loss #health

science1 month ago•7 min saved

Mosquito Magnets: Why Some People Draw More Bites and How to Fight Back

Mosquito bites aren’t random: a mix of cues—carbon dioxide output, heat, moisture, and skin odors—along with genetics can make certain people more attractive to mosquitoes. Factors like exercise, alcohol consumption, clothing color, and pregnancy can increase bite risk, while location and exposure also matter. Practical protections include covering exposed skin, using tested repellents (DEET or picaridin), wearing light-colored clothing, reducing standing water around home, and using citronella or lemon eucalyptus candles in the yard; beware unproven remedies like garlic or vitamin supplements.

via Good Housekeeping|

#bug-bites #carbon-dioxide #mosquitoes

health1 month ago•4 min saved

Rising CO2 Could Be Shifting Human Blood Chemistry, Study Finds

A 20-year analysis of NHANES data (about 7,000 people) shows blood bicarbonate rising about 7% as atmospheric CO2 climbs from ~369 ppm to over 420 ppm, with calcium and phosphorus dipping, suggesting the body may be adapting to higher CO2; the study notes correlation, not causation, but warns of potential population-level health implications and recommends monitoring CO2 alongside biomarkers as climate policy considerations evolve.

via ScienceDaily|

#bicarbonate #blood-chemistry #carbon-dioxide

environment1 month ago•5 min saved

Ancient CO2 surge browns forests, underscoring risks of fossil-fuel emissions

A new study of fossilized leaf cuticles from the Paleocene-Eocene Thermal Maximum shows forests thickened briefly but then collapsed as CO2 rose, browning the planet rather than greening it; the current rapid carbon release, with heat and drought, threatens widespread tree mortality and may outpace recovery, underscoring the need to curb fossil fuel use.

via theguardian.com|

#carbon-dioxide #climate-change #environment

health2 months ago•5 min saved

Why Mosquitoes Pick Favorites—and How You Can Beat the Buzz

Doctors say mosquitoes appear to favor certain people: adults and anyone who runs hot, expels more carbon dioxide (pregnant women and those exercising), or who drinks alcohol may attract more bites. There’s some evidence that Type O blood draws more bites than Type A. To reduce risk, use 20-30% DEET, wear long sleeves and light-colored clothing, and stay vigilant as Michigan’s mosquito season lasts until the first hard frost.

via WXYZ Channel 7|

#bites #blood-type #carbon-dioxide

home-and-garden2 months ago•4 min saved

Sweat, CO2, and Warmth: How Your Home Workout Attracts Mosquitoes

A pest-control expert explains that mosquitoes are drawn to carbon dioxide, body heat, odors, and standing water—not light—and vigorous indoor workouts can spike CO2 and heat, attracting them into homes, especially when windows are open at dusk. To minimize risk, install fly screens or use a fan, shower after exercising, wear light-colored clothing, and remove standing water around the property.

via Good Housekeeping|

#body-heat #carbon-dioxide #home-and-garden

science2 months ago•12 min saved

The Silent Cloud Over Lake Nyos: Cameroon’s 1986 CO2 Disaster

In the early hours of August 21, 1986, a sudden release of dissolved carbon dioxide from Lake Nyos in Cameroon rolled down the valley in a dense, invisible cloud, killing about 1,700 people and thousands of cattle as the gas, heavier than air, displaced oxygen where sleepers lay. The event, a rare limnic eruption, was poorly understood for years, leading to degassing projects at Nyos and Monoun and a larger, ongoing effort at nearby Lake Kivu, underscoring how ordinary-looking lakes can harbor deadly hazards with no surface warning.

via Space Daily|

#carbon-dioxide #degassing-pipes #lake-kivu

science2 months ago•6 min saved

Seeing CO2 Become Graphite: Real-Time Insights from Molten-Salt Electrolysis

Using operando Raman microscopy, researchers watched CO2 electrolysis in molten salts convert carbon dioxide into solid carbon (graphite) via a two-step pathway with a peroxide intermediate; the form of carbon deposited depends on the cathode (nickel, Inconel, gold, tungsten). The study, published in Nature Communications by Ratso et al., suggests CO2-derived graphite could supply battery materials and, if powered by renewables, achieve a negative CO2 balance, but it’s not a climate solution on its own and will require further optimization.

via ScienceAlert|

#battery-materials #carbon-dioxide #graphite

health-and-science2 months ago•15 min saved

CO2 Breaths May Help Clear Alzheimer's Brain Waste, Early Study Finds

Researchers presented small 2025 findings showing brief CO2 pulses delivered via masks can activate the brain's glymphatic clearance, boosting cerebrospinal fluid inflow and evacuating proteins such as tau (with higher amyloid beta in blood), suggesting a potential non-invasive approach to address Alzheimer's pathology. However the study is preliminary and larger trials are needed to assess safety, long-term effects, and cognitive outcomes; not a clinical therapy yet.

via Dallas Express|

#alzheimers-disease #carbon-dioxide #clinical-trials

health2 months ago•8 min saved

Breathing Bursts May Help Clear Alzheimer's Proteins in the Awake Brain

Researchers presented at the Alzheimer’s Association International Conference that brief, wakeful CO2 bursts may stimulate the brain’s glymphatic system, aiding clearance of tau and raising blood beta-amyloid temporarily; findings from a small 12-person study also reference breath-centered practices like yoga as potential contributors, but more research is needed to determine if this could slow cognitive decline.

via HuffPost UK|

#amyloid #carbon-dioxide #dementia

science2 months ago•11 min saved

A Prolonged Volcanic Pulse Behind Earth's Great Die-Off

Around 252 million years ago, a long-lived Siberian Traps volcanic episode released vast greenhouse gases—via surface lava and underground sill intrusions—warming the climate and oceans and triggering the end-Permian extinction, which wiped out about 90% of marine species; the exact mix of sources and mechanisms (lava, heated sediments, methane release, acidification) remains debated.

via Space Daily|

#carbon-dioxide #end-permian-extinction #ocean-acidification