Sentences with phrase «occur with higher concentrations»

Moreover, although we saw only one interaction, it is very likely that more severe interactions could occur with higher concentrations of pollutants.

Not exact matches

All forms of green tea contain a naturally occurring amino acid called L - Theanine, but the content is higher in matcha green tea, and along with the natural caffeine content, this causes a stimulant which works to increase alertness and improve concentration at the same time.

One of the three major classes of immunoglobulin occurring in human colostrum and milk, secretory IgA, has been found in significantly higher concentrations in the milk of mothers of preterm infants compared with milk from mothers of term infants.3Skin - to - skin contact between mothers and preterm infants in this sample may have promoted maternal production of protective antibodies specific to the nosocomial flora of the NICU.9 The provision of human milk may enable preterm, VLBW infants to compensate for their inherently immature immune status.

This would include low oxygen subsurface sites with environmental conditions predating the Great Oxidation Event that occurred about 2.3 billion years ago when the atmosphere went from very low to high oxygen concentrations.

The increased production in these crops is driven by higher precipitation predicted to occur in the central U.S., combined with higher concentrations of carbon dioxide, which reduces a plant's water requirements.

But almost all these extinctions either occurred in environments with high concentrations of «endemic» species that occur nowhere else, or involved moving species between continents.

* 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.

By spreading exposure evenly across the opportunity set, equal - weight indexes avoid the concentration that can occur in market - cap - weighted indexes, giving you the higher upside potential of small cap with the overall stability of large cap.

Small breeds also tend to live longer than larger breeds, so having a dog food with a high concentration of antioxidants can help to prevent any free radical damage that may occur as your miniature or teacup Yorkie ages.

Reactions are more common in cats, and often occur when pet guardians mistakenly use a dog product with a much higher concentration of pyrethrins on cats.

Specimens of elkhorn coral living in water with excess carbon dioxide have been studied for fertilization rates, ability of larvae to settle on reef substrate (where they produce new corals), and subsequent growth and survival.3 Three levels of carbon dioxide were tested, corresponding to concentrations today, at mid-century, and at the end of the century on a high - emissions path.3, 5 At the mid-century concentration, the ability of fertilization to occur and for larvae to settle successfully on the reef was significantly reduced: around 52 percent, and the decline intensified to about 73 percent at the late - century concentration.3 The corals» ability to survive over the long run declined as well, by an average of 39 percent and 50 percent respectively.3, 4

More enlightening and contrary to catastrophic CO2 assertions that rising CO2 will decimate calcium carbonate shell producers, the greatest proliferation of calcium carbonate shell producers occurred during this period with the high temperatures and high concentrations of atmospheric CO2.

Increased weed and pest pressure associated with longer growing seasons and warmer winters will be an increasingly important challenge; there are already examples of earlier arrival and increased populations of some insect pests such as corn earworm.64 Furthermore, many of the most aggressive weeds, such as kudzu, benefit more than crop plants from higher atmospheric carbon dioxide, and become more resistant to herbicide control.72 Many weeds respond better than most cash crops to increasing carbon dioxide concentrations, particularly «invasive» weeds with the so - called C3 photosynthetic pathway, and with rapid and expansive growth patterns, including large allocations of below - ground biomass, such as roots.73 Research also suggests that glyphosate (for example, Roundup), the most widely - used herbicide in the United States, loses its efficacy on weeds grown at the increased carbon dioxide levels likely to occur in the coming decades.74 To date, all weed / crop competition studies where the photosynthetic pathway is the same for both species favor weed growth over crop growth as carbon dioxide is increased.72

The fact that the earth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism at all.

Since no such effect has been observed or inferred in more than half a billion years of climate, since the concentration of CO2 in the Cambrian atmosphere approached 20 times today's concentration, with an inferred mean global surface temperature no more than 7 ° K higher than today's (Figure 7), and since a feedback - induced runaway greenhouse effect would occur even in today's climate where b > = 3.2 W m — 2 K — 1 but has not occurred, the IPCC's high - end estimates of the magnitude of individual temperature feedbacks are very likely to be excessive, implying that its central estimates are also likely to be excessive.

Crystal meth use has risen drastically since 2003, with the highest concentration of crystal meth - related deaths occurring in British Columbia.