Articles tagged with Nitrates
New research reveals that archaea, tiny microorganisms, are capable of digesting ammonia and turning it into nitrate, outcompeting phytoplankton for energy. This finding has significant implications for ocean ecosystems, soil environments, and global climate models.
A Michigan State University researcher suggests that nitrates and nitrites in plant-based foods may provide health benefits, contradicting current regulations. The study's findings support the idea that consuming a diet rich in nitrate-containing vegetables can help lower blood pressure.
A new study published in Journal of Applied Physiology shows that drinking beetroot juice reduces oxygen uptake, allowing individuals to exercise for up to 16% longer. The study also found lower resting blood pressure in those who consumed beetroot juice compared to a placebo.
In the high-latitude North Atlantic, low iron availability unexpectedly limits summer biological production. Experimental results show that adding iron increases photosynthetic efficiency and growth of phytoplankton, but insufficient iron is available to support the bloom.
The American Academy of Pediatrics recommends annual private well testing for nitrate and microorganisms, particularly for infants under three months. Children are vulnerable to waterborne illnesses that can come from contaminated wells, and proper care is essential to prevent contamination.
Researchers found that nitrous oxide production rates in small stream sediments are linked to nitrate availability. The study suggests that management efforts to reduce nitrous oxide production should focus on limiting nitrate transport to stream ecosystems.
A nationwide study found statistically significant increases in nitrate concentrations in 7 of 24 well networks, with median concentrations exceeding the USEPA maximum contaminant level. The study highlights the importance of long-term monitoring programs to protect ground water quality.
A new report by scientists suggests that some of the most harmful air pollution in Mexico City originates from industrial sources, including garbage incineration. The study monitored air quality throughout the month of March 2006 and found metal-containing aerosols implicated in adverse health effects.
The Gaza Strip's drinking water has been found to contain high levels of nitrate, posing a significant risk to infant health. The contamination is primarily attributed to the use of manure and wastewater in farming practices.
A nationwide team of ecologists reports that excess nitrogen loading reduces the efficiency of stream and river networks' natural processes for reducing this pollutant. This overload can lead to eutrophication, oxygen depletion, and death of fish and shellfish downstream.
Researchers found that streams can remove up to 90% of nitrate pollution through denitrification and algal uptake, with effectiveness greatest in healthy streams not overloaded by human activities. Streams play a crucial role in reducing eutrophication problems in lakes and coastal waters.
Researchers found that tiny organisms filter nitrate from stream water, with the most effective removal occurring when nitrate enters small healthy streams and travels throughout the network. Streams and rivers can help prevent nitrate pollution from reaching lakes and coastal waters, where it can cause algal blooms and oxygen depletion.
A national study found that tiny organisms like algae and bacteria can remove nitrate from stream water, improving water quality. Streams that meander naturally through complex channels are more efficient at filtering pollutants than engineered streams.
Small streams play a crucial role in removing human-generated nitrogen, reducing eutrophication and 'dead zones' in downstream lakes and coastal waters. The study found that the effectiveness of streams in removing nitrate is greatest when not overloaded by nitrogen sources.
A new study by 31 scientists shows that streams play a critical role in filtering out excess nitrogen that feeds algae blooms. The research found that streams are most effective at removing nitrogen when they are not overloaded with fertilizers and other human activities.
Streams are effective nitrogen filters, but their capacity to remove pollutants is limited by high loading rates. Researchers used a tracer to track nitrate additions in 72 streams across the US and Puerto Rico.
A UC Riverside-led study has discovered a vast pool of nitrate in near-surface desert soils under 'desert pavement', which could contaminate surface and groundwaters. The researchers warn that disruptions to these areas could result in wind erosion, transporting high levels of nitrate to groundwater or surface waters.
A study of Lake Bloomington, a major source of drinking water for central Illinois residents, reveals high nitrate concentrations exceeding safe levels. The research aims to inform producers on nitrogen fertilizer management in sensitive watershed areas.
Researchers tracked sulfate and nitrate movement in forest soils during winter, finding most compounds were released in snowmelt. Organic soils acted as a sink for these compounds, with significant ammonium production indicating N mineralization was important.
A preclinical study found that mice fed extra nitrite and nitrate had 48% less cell death in the heart following a heart attack. Nitrite/nitrate-rich diets may improve outcome following a heart attack by forming nitric oxide gas, which reopens closed or clogged arteries.
Researchers found that consuming vegetables rich in nitrite can reduce heart-muscle damage by 48% and provide protection from heart-attacks. Boosting nitrite levels in the diet could help prevent lasting heart damage or death, particularly for those at increased risk.
A new study suggests that urban areas and roadways could be major contributors to nitrate pollution, which can harm aquatic ecosystems and human health. The research found that stationary sources, such as power plants, are the primary source of nitrate in urban areas.
A team of researchers led by Darrell Taulbee has created a new type of fertilizer that reduces the explosive potential of ammonium nitrate, a key ingredient in homemade bombs. By coating AN pellets with coal ash, they achieve a blast much less violent, without eliminating its initiating power.
A study by University of Minnesota researchers found that alternative cropping systems reduced nitrate levels in surface and ground water by 41-62% compared to conventional farming practices. Increasing cropping system biodiversity can improve water quality.
Research by Dr. Paul Winchester found that children conceived in June-August had lower math and language ISTEP scores, potentially linked to prenatal exposure to pesticides and nitrates. The study suggests that environmental factors during pregnancy may have long-term effects on cognitive development.
Research suggests a seasonal correlation between pesticides, nitrates, and premature births, with highest rates in May-June and lowest in August-September. The study analyzed over 27 million US live births and found a significant link between environmental contaminants and adverse pregnancy outcomes.
A new approach to locating and removing water contaminants such as perchlorate and nitrates has been discovered. Researchers found that anion-pi interaction, a type of molecular binding, occurs off-center in solid-state structures, which could lead to the development of sensors for anion detection.
A new Stanford University study found that organic fertilizers produced less environmental harm than synthetic chemicals, reducing nitrogen pollution and greenhouse gas emissions. Organic farming also promoted the growth of beneficial denitrifying bacteria, which converted excess nitrates into harmless gases.
A new study published in The Journal of Sexual Medicine found that over half of men with ED and cardiac disease can safely discontinue oral nitrates to use PDE-5 inhibitors, restoring sexual function. The study showed no adverse cardiac events in the group, providing new evidence-based care for men with ED and cardiac disease.
A man-made wetland in Ohio State University's Olentangy River Wetland Research Park reduced phosphorus levels by 59% and nitrates by 40%. The wetland, created using a simple design, acted as an effective sink for nutrients, reducing pollution in the Great Miami River and local lake.
Researchers discovered a large class of airborne particles that react with nitric acid to form calcium nitrate, altering sunlight reflection and cloud-altering properties. The newly formed particles can absorb water, scattering and absorbing sunlight, posing a new challenge for climate modelers.
Researchers studied 35 men with CHF who did not use nitrates. Sildenafil improved erectile dysfunction and reduced depression in the group that took it for six weeks, without causing dangerous drops in blood pressure.
An agricultural experiment from 1969 showed that nitrate fertilizer can persist in groundwater and streams for decades, influencing water quality. The study, conducted nearly 30 years later, confirmed this finding and highlights the need for long-term research on agricultural pollution.
Researchers found that tire chips can absorb nitrate, a main chemical in fertilizers, reducing pollution in groundwater. Turfgrass quality was not affected by the rubber layer, suggesting it can be used as a sustainable solution for golf courses.
Researchers have discovered large reservoirs of nitrates in desert subsoils, challenging the concept that nitrogen is tightly retained in soil. This finding has implications for potential groundwater nitrate contamination following climate change or land-use alterations in natural deserts.
A new study by Kevin Bronson and colleagues found that in-season nitrogen monitoring can reduce fertilizer use without affecting crop yields. By adjusting nitrogen application rates based on soil moisture and plant growth, farmers can save money and minimize nitrate contamination of waterways.
The Waddenzee's water quality has changed significantly over the past 140 years, with a doubling of freshwater quantity contributing to increased nutrient levels. This shift affects species composition and plankton growth, with algal blooms continuing to increase.
A study by MIT researchers found that nitrate pollution has a mitigating effect on arsenic release in polluted lakes. The discovery sheds light on the complex dynamics of water quality management and has implications for other pollutants, including phosphate and toxic metals.
A Mayo Clinic study found that sildenafil does not worsen symptoms of inadequate blood supply to the heart muscle during exercise in men with coronary artery disease. The study, which involved 105 patients, suggests that sildenafil can be safely prescribed for these patients without increasing their risk of heart attacks.
Researchers found that elevated carbon dioxide levels hinder nitrate assimilation in plants, leading to reduced protein content and increased risk of malnutrition. The study suggests a shift from nitrate to ammonium fertilizers may be necessary to maintain crop yields under high CO2 conditions.
A study published in the European Journal of Clinical Investigation found an association between nitrate levels in groundwater and the incidence of SIDS. The researchers analyzed over 600 cases and discovered that deaths occurred more frequently during periods of high nitrate concentrations, particularly in areas with rapidly increasin...
A new study suggests that increasing fertilizer efficiency could reduce nitrate levels in the Mississippi River by up to 33% while maintaining crop yields. The research found that a modest reduction in nitrogen fertilizer use could substantially reduce nitrate concentrations in the river.
Studies found that up to 70% of stream respiration and 10-50% of nitrate uptake occur in hyporheic zones, which retain more nitrogen. This process may be a crucial player in global nitrogen dynamics.
A study by Mayo Clinic researchers reveals a possible cause of sudden deaths among men using Viagra, highlighting the need for safe use guidelines. The interaction between Viagra and nitrates can reduce blood flow through critically narrowed coronary arteries, leading to a life-threatening drop in oxygen supply.
A new study at Oregon State University found that low levels of nitrate and nitrite in water can kill some species of amphibians, especially during their larval stages. The study suggests that water quality criteria set by the EPA may not guarantee the survival of all protected and endangered amphibian species.
Biologists found Thiomargarita namibiensis in sediments off Namibian coast, living up to 3/4 mm wide and storing nitrate in an 'anaerobic lung'. The bacteria can survive for three months without external supply of nutrients, playing a crucial role in oxidizing toxic sulfide.
Researchers found a direct correlation between high nitrate levels and nitrogen-rich bedrock in California's Sierra Nevada mountain range. Nitrogen-rich rocks released into the environment can cause massive algae blooms and affect human health.
Researchers found a link between rainfall and nitrate leaching, with increased rainfall leading to higher nitrate levels in tile flow. The study recommends applying nitrogen fertilizer in the spring to prevent excessive nitrate loss.
Nitrate reductase is an efficient enzyme essential for plants to acquire nitrate. Researchers aim to create a 3-D model of the enzyme to understand its structure and function. The study seeks to overcome production limitations and unlock the enzyme's full potential.