Sentences with phrase «at concentrations much»

It is a colorless, odorless gas that is not toxic to humans and other animals even at concentrations much higher than we are currently experiencing.

Chlorine is easy to smell at concentrations much less than fatal.

As it is «visually undetectable in drinking water, even at concentrations much greater than those typically found in groundwater... it could lead to ingestion of water with high manganese II concentrations.»

Not exact matches

[34] Wealth is much more highly concentrated than income, and concentration at the top has risen since the 1980s.

History teaches us that capital concentration heightens investment risk, very much as a concentration of climbers at the Hillary Step on Everest heightens personal survival risk.

I have discovered that in this concentration I can say everything, far more clearly, unambiguously, simply and more in the way of a confession, and at the same time also much more freely, openly and comprehensively, than I could ever say it before.

Visiting Villa Grimaldi in Santiago, Chile, left me with much the same chill I felt at Dachau, the former Nazi concentration camp outside Munich.

The prospect of what some have called «the colonization of the womb» and the enormity of the problems looming on the horizon should stir us all to outrage at the concentration of so much energy and so many resources, so much sound and fury, on the abortion issue.

Apparently the fact that MBC is permitted at much (much) higher concentrations in those other juice products is lost on FDA.»

The Championship promotion hopefuls had managed to shackle Arsenal for much of the first half at the KC Stadium, but Meyler's lapse in concentration has given them a mountain to climb after the break.

He might be scoring, but not as much as he should be in relation to the number of chances that come his way, and that is more due to his lapses of concentration at times.

Our defensive concentration was at a much higher level than on Wednesday night.

Thirty minutes had passed without too much to worry about, but a moments lapse of concentration can be deadly at this level, and so it proved.

Red Bulls form at home this year, despite the distraction of much squad rotation with a concentration on Champions League, has been almost perfect.

His shot rebounded to his captain, who fired home the winner but as the replays rolled it was clear that the goal had actually relied upon Jordon Ibe's loss of concentration at the set piece as much if not more than anything a United player had done to create or score the chance.

What the experts suggest you say: «Every stay - at - home mom knows that it's impossible to get on the phone or do anything that requires much concentration when you have young kids awake at home,» says Stanton.

These sedatives were found at much lower concentrations in milk expressed during the day.

This is a much cheaper option to IUI and gets 3 times higher sperm concentration at the cervix compared with natural intercourse plus it has worked for many couples.

Mint appeared in the mom's milk at lower concentrations but peaked much later, at six hours after ingestion.

In particular, the concentration of reform efforts on the revenue side allowed the government to make visible improvements at the top while leaving the expenditure side essentially unreformed and indeed shifting much patronage downwards.

«For example, [measuring] chlorophyll a will give you information about how much biological activity is going on, and eventually more information about the concentration of carbon dioxide within the ocean and the atmosphere,» said Yoshihisa Shirayama, executive director of research at the Japan Agency for Marine - Earth Science and Technology in Tokyo.

This is partly due to the current atmosphere containing much less CO2 — approximately 400 ppm (parts per million)-- compared to before the PETM, where the concentration was about 1,000 ppm and partly because we emit carbon into the atmosphere at a much faster rate than during the PETM.

According to previous simulations, UV - B radiation at the end of the Permian may have increased from a background level of 10 kilojoules (just above current ambient levels) to as much as 100 kilojoules, due to large concentrations of ozone - damaging halogens spewed from volcanoes (SN: 1/15/11, p. 12).

So, we're talking about this period 3.5 million years ago, this is the middle Pleistocene, and that's where the CO2 concentrations were round about 400 ppm; and if we want to look at CO2 concentrations considerably higher than that, we're going to go much deeper in time, and then we're really going into periods where sea level was even higher.

The detected concentrations are much lower than the Canadian safety limit for cesium levels in drinking water, said John Smith, a research scientist at Canada's Bedford Institute of Oceanography in Dartmouth, Nova Scotia.

Had these concentrations been even slightly lower, the effects of the emission of harmful greenhouse gases would have been felt much earlier, at a time when humankind was not yet ready or knowledgeable enough to face up to mitigation efforts.

Animal studies show effects of BPA at much lower concentrations.

At much higher concentrations, chlorine could damage the cells in our body.

Because carotid cells produce so much dopamine — up to 45 times more than the fetal neurons — and because they thrive in the relatively low oxygen concentrations found in the brain, he explains, they may do a better job at correcting Parkinson's symptoms than the fetal cells do — and they raise fewer ethical questions.

The new connections can allow these cells to operate at solar concentrations of 70,000 suns» worth of energy without losing much voltage as «wasted energy» or heat.

Although the concentration of carbon dioxide in the atmosphere is much higher, at around 385 parts per million, methane is a worry as it is much better than carbon dioxide at locking in heat from solar radiation.

It also eliminates much of the uncertainty surrounding potentially ill effects; whereas various mathematical models may disagree about when and at what concentrations Arctic Ocean sea ice disappears, they all agree that at roughly 3 degrees C of warming, the far north will be ice - free.

By looking at how concentrations of chemical elements in the sediment change with depth, the researchers can develop a continuous record of how much surface runoff poured into the lake.

Then again, given the climate change impacts already seen at present greenhouse gas concentrations, the world may not have much choice.

At such concentrations, a cubic yard of soil would contain as much as five gallons of water.

Mercury and PCBs (polychlorinated biphenyl) concentrations were at the EPA threshold for occasional human consumption, while concentrations of DDT were consistently much lower than the established threshold.

A sample of an animal's breath is much easier to obtain, and researchers believe it contains as many diagnostic molecules as blood, just at lower concentrations that are much harder to detect and analyze.

The new study shows that radiation can damage larvae even at much lower concentrations.

But at moments of much greater traffic — when messages are sent up to 200 times as frequently — the highest concentration of tweets is only around 25 characters in length, and declines sharply to a low at about the 130 - character mark.

They found that phytoplankton were much more efficient at assimilating vanishingly low phosphorus concentrations than would have been predicted from culture research.

Chemotherapy usually requires the delivery of multiple toxic drugs at high concentrations, and we could deliver all of these drugs in one injection at much lower dosages.

While some strains died on exposure, others were able to survive at much higher concentrations of chlorhexidine than their parental strains.

«Particles of any kind, even much smaller than the wavelength of visible light, will, as a rule, make the sky brighter but at the expense of its purity of color,» Bohren says, noting that the effect is more pronounced when there is a high concentration of large aerosols.

Mercury is deposited on the ground (dry deposition) or via rainfall (wet deposition) where it bioaccumulates and biomagnifies, ending up at much high concentrations in fish and mammals.

«We found that jasmonates, when applied according to our protocol, worked just as well to inhibit sprouting, even at much lower concentrations than CIPC,» says Lulai.

«And we do not anticipate needing to use as much of the iron oxide at concentrations higher than what's already been approved.

In response, the cells underwent changes indicative of senescence, ceasing cell division and churning out key SASP factors.7 Notably, astrocytes were much more vulnerable to paraquat than skin cells: astrocytes went senescent at a lower concentration of the toxin than was required for skin cells, and the doses that turned skin cells senescent killed astrocytes outright.7

In their search for the pervasive - yet - elusive particles of dark matter, astronomers have tried to find galaxies with much higher concentrations of the mysterious substance — it does not interact with visible matter at all, except through gravity, which is how scientists can theorize its existence.

«We found that while resistant parasites are much better at surviving ART treatment than sensitive parasites, extending the ART treatment or adding a very low concentration of an anticancer drug is enough to completely reverse the resistance mechanism.»

Such increased potency means the designer antibody could be used therapeutically at much lower concentrations.