Sentences with phrase «when exposed»

Breast cancer cells, levitating between magnets in a fluid chamber, die and sink when exposed to acid.

The sensor characteristics were also maintained even when exposed to various substances in human tears.

Because products are often valued and discerned based on their uniqueness and distinctiveness, the authors predicted that participants would be subsequently less confident about their choices when exposed to more (versus less) photos.

Bumblebees are less able to start colonies when exposed to a common neonicotinoid pesticide, shows new research.

Additionally, because infants inhale significantly higher air volume per body weight than adults and sleep a longer time, they experience about 10 times as much inhalation exposure as adults when exposed to the same level of VOCs, the researchers said.

Such measurements could be used to sort different types of cells — to distinguish cancerous cells from healthy ones, for example — or to measure how cells change when exposed to drugs.

Scientists have tried building the electrodes out of common semiconductors such as silicon or gallium arsenide — which absorb light and are also used in solar panels — but a major problem is that these materials develop an oxide layer (that is, rust) when exposed to water.

Most HIV drugs target viral proteins, but because they often mutate when exposed to antiretroviral agents, resistance can develop quickly.

The prostheses were made from a resin that hardens when exposed to ultraviolet laser light.

Boris Baer of the University of Western Australia, Crawley, and colleagues tested the viability of sperm in an insect's own seminal fluid, and when exposed to the secretions of...

When they exposed the transgenic strain to light and temperatures that foster rapid growth, the luminescent glow from the colonies showed cyclical changes that repeated every 24 hours.

Dong has worked with SpaceX and Boeing in the past to test the effect radiation has on electronics and the recovery software necessary to make sure those devices work when exposed to space - like levels.

When exposed to light, thymine molecules attach to one another; because this reaction can be harmful (think: skin cancer) many organisms possess enzymes tasked with breaking those bonds.

When they exposed these mice to the cold, the animals developed far fewer beige fat cells than did normal animals, suggesting that macrophages were key to browning of white fat.

When exposed to oxygen, malathion turns into malaoxon, which kills insects by inhibiting an enzyme, acetylcholinesterase, that breaks down acetylcholine.

Their work has already shown that airborne microorganisms die when exposed to ultraviolet rays and titanium dioxide — a common ingredient in toothpaste and a pigment in paint.

They lose this heat resistance property in darkness and will only regain the protection when exposed to light again.

They incorporated a photocatalyst in a moisture - absorbing, semiconducting paint that can produce hydrogen from water in the air when exposed to sunlight.

Later on in school, I discovered chemistry and was equally intrigued with processes such as the changes that occur in metal and organic substances when exposed to heat.

This dye emits a phosphorescent glow when exposed to a monochromatic LED light source, which excites individual electrons and raises them to a higher energy level.

When exposed to sheets of carbon - atom cages called buckyballs, copper and manganese become permanent magnets, researchers report in the Aug. 6 Nature.

The scientists discovered that dinaciclib, by interfering with UPR activation, caused multiple myeloma and myeloid leukemia cells to initiate a form of cell suicide known as apoptosis when exposed to agents that induced ER stress.

They found that gamma delta T cells produce far more infection - killing chemicals, including interferon, when exposed to large quantities of ethylamine, an alkylamine antigen.

In the tea drinkers» immune systems, gamma delta T cells produced five times more infection - fighting interferon when exposed to disease - causing bacteria than did the T cells of the coffee drinkers.

«When we exposed a near - infrared laser beam to these animal models injected with both the nanoparticle and the genetically engineered immune cells, this caused calcium channels on the dendritic cells to open and we saw a corresponding increase in the number of T - cells that were activated,» said Han.

When exposed to the actual flu, these antibodies can eliminate the flu virus.

When exposed to blue light, the calcium ion gates on the dendritic cell open and it is activated.

But mortality of most organisms was higher when exposed to sunlight, moisture and desiccation than when protected,» he explains.

They suspect that vaterite may be present on more plant species, but that the unstable mineral is being converted to calcite when exposed to wind and rain.

«Soil can carry unwanted microbes, insects and plants, and this study showed that some died faster when exposed, than when protected in a cupboard.

An automated microscopy system monitored the cells» health and recorded which groups of cells were killed, which survived, and which developed resistance when exposed to a particular treatment.

About 40 per cent of the population have a genetic disposition to celiac disease, but only about one per cent develop the autoimmune condition when exposed to gluten, and this could be promoted by the type of bacteria present in the gut.

The intervening sequence RNA excised from the ribosomal RNA precursor of Tetrahymena forms linear and circular oligomers when exposed to a heating - cooling treatment in vitro.

The latter approach involves mixing water with nanoparticles that heat up quickly when exposed to sunlight, vaporizing the surrounding water molecules as steam.

A team of bioengineers at Brigham and Women's Hospital (BWH), led by Ali Khademhosseini, PhD, and Nasim Annabi, PhD, of the Biomedical Engineering Division, has developed a new protein - based gel that, when exposed to light, mimics many of the properties of elastic tissue, such as skin and blood vessels.

Conventional solar electrodes made of silicon quickly corrode when exposed to oxygen, a key byproduct of water splitting.

«Sunscreens are known to prevent skin from burning when exposed to UV sunlight, which is a major risk factor for melanoma.

Some substances in drugs, cosmetics and medicinal herbs can be toxic to the skin when exposed to ultraviolet light.

When exposed to a concentration gradient of glucose — more sugar in one spot than another — the polymersomes absorb the sugar molecules and break them down.

«Helium ions open whole new world of materials: Using a helium ion microscope, researchers are exploring the way materials change when exposed to helium ions..»

«However, the nanosheets themselves are very delicate and quickly disintegrate when exposed to UV light, which has significantly limited their application thus far.»

«When exposed to elevated levels of particulate pollution, older adults are more likely to get pneumonia, be hospitalized with severe pneumonia and also die from pneumonia in the hospital,» says the study's lead author Cheryl Pirozzi, M.D., a pulmonologist and assistant professor of Internal Medicine at University of Utah Health.

To form the film, the researchers mixed a type of clay that sheds layers when exposed to ultrasonic pulses with water and a polymer to stick the layers together.

The chemical requires careful handling, because as a pyrophoric, it catches fire when exposed to air.

Rather, a faulty spray valve on the can dispensed too much sunscreen so that the product took longer to dry than usual and was still moist when exposed to a flame.

This has attracted much attention as a technology that surpass the limits of conventional chemical - based adhesives that significantly lose adhesion capability when exposed to moisture or when reused.

Bioengineers have developed a new protein - based gel that, when exposed to light, mimics many of the properties of elastic tissue, such as skin and blood vessels.

In these re-colonized plants, the phosphate stress response increased when exposed to a low - phosphate condition.

When used in jewelry, gold is prized for its nonreactive properties — it doesn't rust or tarnish when exposed to air or water.

The male jumping spiders have specialized scales that glow white and green when exposed to UV light; in female spiders, the palps (front appendages) appeared green under UV light.