Sentences with phrase «laboratory evidence suggests»

Laboratory evidence suggests that the effectiveness of photosynthesising organisms is badly hindered when CO2 levels drop below about 200ppm (and indeed commercial greenhouses pump in extra CO2 to improve the efficiency of some plant growth — my non-researched background is that tomato plants particularly respond well to this), but the geological evidence suggests that life can tolerate far higher atmospheric CO2 levels.

The toxic effects of inorganic As are clear, and laboratory evidence suggest that organic forms also may pose a health risk, 32 although further data are needed.

Not exact matches

«Evidence suggests that the temperature - sex relationship found in the laboratory is less tight in nature and verification of sex ratios is often insufficient or absent,» said Wyneken.

While evidence obtained in our and other laboratories strongly suggests that H. pylori triggers a transcriptional response, epigenetic alterations and DNA damage in infected cells, most of the data supporting these findings rest on fragmentary analyses of clinical samples and cells infected in vitro.

It has been suggested that these drugs reduce CSF pressure however laboratory evidence of this is lacking.

Benjamin D. Santer, a climate scientist at Lawrence Livermore National Laboratory whose work for the Intergovernmental Panel on Climate Change was challenged by the Global Climate Coalition and allied groups, said the coalition was «engaging in a full - court press at the time, trying to cast doubt on the bottom - line conclusion of the I.P.C.C.» That panel concluded in 1995 that «the balance of evidence suggests a discernible human influence on global climate.»

Importantly, accumulating evidence from a diverse collection of laboratories also suggests this PFC - mediated work is computationally and bioenergetically costly [55], [56], which places a conservation pressure on prefrontal function [13].

Fact: «The inflated figures of between 10 and 30 per cent have their origins in some very questionable research... the most recent evidence, based upon medical records, sex surveys, DNA testing laboratories and genetic studies... suggests relatively low rates of misattributed paternity in Western countries» with figures realistically between one and 3 percent, but probably closer to one percent.