Sentences with phrase «only at low concentrations»

Not exact matches

Two of London's local authorities rank in some of the lowest concentrations of home educated students in the country, among them are Westminster and Lambeth where only 0.14 % and 0.12 % of 5 - 16 year olds study at home.

This synergy allows the drugs to be used at lower concentrations, thereby reducing toxicity, and could «increase the chances that only the virus is reactivated,» Verdin says.

Sames says the team could detect it by mass spectrometry, but only at very low 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.

For that reason, researchers measured the concentration of selenium in participants» toenails and planned to test whether selenium supplementation would benefit only the subset of men with low selenium status at baseline.

Moreover, annexin V / propidium iodide staining showed that VPA only marginally decreased the viability of in vitro — differentiated Th1 and Th17 cells at a relatively high concentration (1 mM)(Supplemental Fig. 4A, 4B), whereas VPA readily inhibited the differentiation of Th1 and Th17 cells at a low concentration (0.2 — 0.5 mM), indicating that apoptosis induction was not the primary mechanism for Th1 and Th17 cell differentiation inhibition (28, 29).

It is possible that the vitamin D concentrations of the milk would have been higher if the mothers had been consuming only vitamin D3, the animal form of vitamin D. Vitamin D is carried into breast milk attached to the vitamin D - binding protein; 21 since one study found vitamin D2 to have a lower affinity than vitamin D3 for the vitamin D - binding protein, it may be that vitamin D3 is much more effective than vitamin D2 at raising the levels of vitamin D in milk.

* Oddly enough, however, the experiments with fresh pancreatic islets and fat cells taken from the mice suggested that the positive effects of uncarboxylated osteocalcin on insulin only occurred at concentrations extremely low compared to those of undercarboxylated osteocalcin normally present in mice, while the effects on adiponectin and energy expenditure only occurred at normal to high concentrations.

Fasting plasma glucose and insulin concentrations were reduced to control concentrations, and plasma insulin concentrations during the OGTT were significantly lower than those in the the rats fed fructose only at all time - points.

However, because atmospheric concentrations of water vapor tend to be at most only a few percent of the amount of air (and usually much lower), they are both often expressed in units of grams of water vapor per kilogram of (moist or dry) air.

Improvements in our understanding of clathrate chemistry and sedimentology have revealed that hydrates form in only a narrow range of depths (continental shelves), at only some locations in the range of depths where they could occur (10 - 30 % of the Gas hydrate stability zone), and typically are found at low concentrations (0.9 — 1.5 % by volume) at sites where they do occur.

Trenberth still relates the effect from CO2 based on 100ppmv causing an increase of 0.6 °C but does not subtract the 0.5 °C of natural warming as recovery from the LIA that has nothing to do with CO2 emissions therefore producing an effect six times too high for the effect from increased CO2 Trenberth is not aware that CO2 is not increaseing at an accelerated rate as predicted by Hansen but at a near linear rate averaging 2.037 ppmv / year so by 2100 the concentration will not be as predicted by the IPCC as per scenario A1 but merely reach a level of 573.11 ppmv by 2100, This is only in the case that CO2 increase is maintained but this may not happen as the rate appears to be slowing down with the average rate for the past 5 years being lower than the rate for the past ten years.