Tag Archives: reduction

Artificial Forest for Solar Water-Splitting

By Guest PostJune 14, 2013Environmentartificial forest, atmospheric carbon dioxide, berkeley lab, bin liu, carbon neutral, chloroplasts, chong liu, fuel conversion, green plants, hao ming chen, hydrogen generating photocathode, jinyao tang, nanowire heterostructures, natural photosynthesis, ohmic contact, oxidation half reactions, oxygen molecules, peidong yang, photosynthesis, reduction, renewable energy, silicon, solar, solar water splitting, stable semiconductors, titanium oxide, z scheme

Berkeley Lab Researchers Report First Fully Integrated Artificial Photosynthesis Nanosystem

In the wake of the sobering news that atmospheric carbon dioxide is now at its highest level in at least three million years, an important advance in the race to develop carbon-neutral renewable energy sources has been achieved. Scientists with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have reported the first fully integrated nanosystem for artificial photosynthesis. While “artificial leaf” is the popular term for such a system, the key to this success was an “artificial forest.”

“Similar to the chloroplasts in green plants that carry out photosynthesis, our artificial photosynthetic system is composed of two semiconductor light absorbers, an interfacial layer for charge transport, and spatially separated co-catalysts,” says Peidong Yang, a chemist with Berkeley Lab’s Materials Sciences Division, who led this research. “To facilitate solar water- splitting in our system, we synthesized tree-like nanowire heterostructures, consisting of silicon trunks and titanium oxide branches. Visually, arrays of these nanostructures very much resemble an artificial forest.” (more…)

Renewable News

By Guest PostDecember 10, 2012Environmentbatteries, carbon dioxide, computer model, cory budischak, electric grid, electricity demands, electricity generation capability, electricity sources, external cost, gigawatt, greenhouse gas, human health effects, hydrogen tanks, natural gas, new jersey, pjm interconnection, power grid, power sector, reduction, renewable energy, renewable news, solar power, storage, storage mechanisms, storage medium, united states, university of delaware, willett kempton, wind, wind power

Wind, solar power paired with storage could be cost-effective way to power grid

Renewable energy could fully power a large electric grid 99.9 percent of the time by 2030 at costs comparable to today’s electricity expenses, according to new research by the University of Delaware and Delaware Technical Community College.

A well-designed combination of wind power, solar power and storage in batteries and fuel cells would nearly always exceed electricity demands while keeping costs low, the scientists found. (more…)

Elevated Indoor Carbon Dioxide Impairs Decision-Making Performance

By Guest PostOctober 28, 2012Environmentberkeley lab, brain injury, building, carbon dioxide, CO2, cognitive function, concentration, decline, dimension, dysfunctional, economic consequence, economic impact, energy consumption, energy-efficient, human, indoor, mark mendell, new york, pharmaceutical, pollutant, ppm, primary source, rate, reduction, scenarios, sms, state university, suny, upstate medical university, usha satish, ventilation, william fisk

Berkeley Lab scientists surprised to find significant adverse effects of CO2 on human decision-making performance.

Overturning decades of conventional wisdom, researchers at the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have found that moderately high indoor concentrations of carbon dioxide (CO₂) can significantly impair people’s decision-making performance. The results were unexpected and may have particular implications for schools and other spaces with high occupant density.

“In our field we have always had a dogma that CO₂ itself, at the levels we find in buildings, is just not important and doesn’t have any direct impacts on people,” said Berkeley Lab scientist William Fisk, a co-author of the study, which was published in Environmental Health Perspectives online last month. “So these results, which were quite unambiguous, were surprising.” The study was conducted with researchers from State University of New York (SUNY) Upstate Medical University. (more…)

Gold Nanoparticle Prostate Cancer Treatment Found Safe in Dogs, MU Study Shows

By Guest PostOctober 16, 2012Healthancer death, bodily function, cancer, cancer patient, cause, chemotherapy, clinical trial, dose, efficient way, gold nanoparticle, human patient, kattesh katti, missouri, mizzou advantage, one health, one medicine area, prostate cancer, prostate tumor, radioactive, reduction, sandra axiak bechtel, side effect, toxic, travel, treatment, tumor, tumor volume, university, us men, vital organ

New treatment may have fewer side effects than traditional cancer therapy

COLUMBIA, Mo. — Currently, large doses of chemotherapy are required when treating certain forms of cancer, resulting in toxic side effects. The chemicals enter the body and work to destroy or shrink the tumor, but also harm vital organs and drastically affect bodily functions. Now, scientists at the University of Missouri have proven that a new form of prostate cancer treatment that uses radioactive gold nanoparticles, and was developed at MU, is safe to use in dogs. Sandra Axiak-Bechtel, an assistant professor in oncology at the MU College of Veterinary Medicine, says that this is a big step for gold nanoparticle research.

“Proving that gold nanoparticles are safe to use in the treatment of prostate cancer in dogs is a big step toward gaining approval for clinical trials in men,” Axiak-Bechtel said. “Dogs develop prostate cancer naturally in a very similar way as humans, so the gold nanoparticle treatment has a great chance to translate well to human patients.” (more…)

IBM Teams With ESB to Develop an Electric Vehicle Smart Charging IT System in Ireland

By Guest PostOctober 1, 2012Technologyaction plan, allan schurr, billing cost, charge points, charging, cloud computing, co2 emission, electric vehicle, electricity provider, energy policy, esb ecars, esb network, European Union, ev driver, financial insight, for, green energy, greenhouse gas, ibm, industry participants, ireland, it system, jobs, legislation, pat odoherty, pollution level, public, reduction, renewable energy, richard bruton, scalable level

ARMONK, N.Y. and DUBLIN – 01 Oct 2012: IBM today announced that it has teamed with ESB ecars to implement a fully integrated smarter charging IT system that will help manage electric vehicle public charge points, which are being rolled out across Ireland by ESB ecars. Together the companies will add a layer of intelligence and convenience to the charging process, allowing EV drivers to access, charge and pay, using an identification card. Additionally, this project will provide utilities with access to energy usage data that can help improve smart grid operations, reduce power strain during peak charging times, and ensure reliable energy distribution to customers.

With approximately 1,000 public charging-points currently available, ESB Networks is on track to deliver one of the largest integrated and operational electric vehicle infrastructures in Europe. ESB Networks will use IBM’s Intelligent Electric Vehicle Enablement Platform to provide the services needed to operate and manage the charge-points installed throughout Ireland. (more…)

Scientists Dramatically Reduce Plaque-Forming Substances in Mice with Alzheimer’s Disease

By Guest PostSeptember 8, 2012Sciencea beta peptides, ajaya kunwar, alzheimer's disease, amp kinase, ampk, amyloid beta, amyloid precursor protein, app, chemical reaction, chhavy tep, cognitive decline, compound, cycle, dong ju park, endoplasmic reticulum, enzyme, er, fat, genetic manipulation, glucose, jae cheon ryu, jnk3, metabolism, mice, mouse brain, mtor pathway, ohio state university, proteins, reduction, rna expression, sung ok yoon, symptom, tae hee lim, type 2 diabetes, yong jae shin

COLUMBUS, Ohio – Scientists have found that eliminating an enzyme from mice with symptoms of Alzheimer’s disease leads to a 90 percent reduction in the compounds responsible for formation of the plaques linked to Alzheimer’s disease.

That is the most dramatic reduction in this compound reported to date in published research.

The compounds are amyloid beta, or A-beta peptides; peptides are proteins, but are shorter in length. When A-beta peptides accumulate in excessive amounts in the brain, they can form plaques, which are a hallmark of Alzheimer’s disease. (more…)

NASA Finds Sea Ice Driving Arctic Air Pollutants

By Guest PostMarch 4, 2012Environmentamundsen gulf, arctas, arctic ocean, arctic sea, Arctic sea ice, arizona, atmosphere, atmospheric model, beaufort sea, bromex, bromine, bromine explosion, bromine monoxide, bromine plume, bromine release, canada, canadian arctic, chemical process, depletion, Germany, ground-level ozone, mercury experiment, molecules, NASA, ozone, pollutant, radiation, reduction, salt, sea ice, son nghiem, texas, toxic mercury, troposphere, united kingdom, united states

PASADENA, Calif. – Drastic reductions in Arctic sea ice in the last decade may be intensifying the chemical release of bromine into the atmosphere, resulting in ground-level ozone depletion and the deposit of toxic mercury in the Arctic, according to a new NASA-led study.

The connection between changes in the Arctic Ocean’s ice cover and bromine chemical processes is determined by the interaction between the salt in sea ice, frigid temperatures and sunlight. When these mix, the salty ice releases bromine into the air and starts a cascade of chemical reactions called a “bromine explosion.” These reactions rapidly create more molecules of bromine monoxide in the atmosphere. Bromine then reacts with a gaseous form of mercury, turning it into a pollutant that falls to Earth’s surface. (more…)

Hydrogen from Acidic Water: Berkeley Lab Researchers Develop a Potential Low Cost Alternative to Platinum for Splitting Water

By Guest PostFebruary 12, 2012Scienceacidic, acidic water, artificial photosynthesis, berkeley lab, catalyst, catalytic hydrogen generation, christopher chang, elizabeth montalvo, emission, hemamala karunadasa, hhmi, hydrogen gas, jeffrey long, low cost alternatives, marcin majda, microdomains, molecule, molybdenite, molybdenite crystals, molybdenum disulfide, natural gas, pentapyridyl ligand, petroleum, photocatalytic systems, platinum, py5me2, reduction, sulfur, sulfur dioxide, water, yujie sun

A technique for creating a new molecule that structurally and chemically replicates the active part of the widely used industrial catalyst molybdenite has been developed by researchers with the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab). This technique holds promise for the creation of catalytic materials that can serve as effective low-cost alternatives to platinum for generating hydrogen gas from water that is acidic.

Christopher Chang and Jeffrey Long, chemists who hold joint appointments with Berkeley Lab and the University of California (UC) Berkeley, led a research team that synthesized a molecule to mimic the triangle-shaped molybdenum disulfide units along the edges of molybdenite crystals, which is where almost all of the catalytic activity takes place. Since the bulk of molybdenite crystalline material is relatively inert from a catalytic standpoint, molecular analogs of the catalytically active edge sites could be used to make new materials that are much more efficient and cost-effective catalysts. (more…)