The 7.5% carbon dioxide (CO2) inhalation model is used to provoke acute anxiety, for example to investigate the effects of anxiety on cognitive processes, or the efficacy of novel anxiolytic agents. However, little is known about the relationship of baseline anxiety sensitivity or trait anxiety (i.e., anxiety proneness), with an individual's response to the 7.5% CO2 challenge. We examined data ...

[1] Inland waters, just as the world’s oceans, play an important role in the global carbon cycle. While lakes and reservoirs typically emit CO2, they also bury carbon in their sediment. The net CO2 emission is largely the result of the decomposition or preservation of terrestrially supplied carbon. What regulates the balance between CO2 emission and carbon burial is not known, but climate chang...

Recent increases in the seasonal amplitude of atmospheric carbon dioxide (CO2) at high latitudes suggest a widespread biospheric response to high-latitude warming. The seasonal amplitude of net ecosystem carbon exchange by northern Siberian ecosystems is shown to be greater in disturbed than undisturbed sites, due to increased summer influx and increased winter efflux. Increased disturbance cou...

S uppose that averting dangerous climate change meant limiting the concentration of greenhouse gases (measured in parts per million, or ppm, by volume) in the atmosphere so that the world faced a temperature increase of no more than 2°C—a goal endorsed by the European Union. What would it take to meet this goal? Because of “climate uncertainty,” we cannot be sure. We can meet the goal with prob...

ABSTRACT: The aim of this study is to measure the in-situ carbon dioxide emissions from forest floors in forested and deforested areas in Karasu Forests in Western Black Sea Region of Turkey. Carbon dioxide emissions from forest floors are one of the main reasons of increasing the carbon concentration in the atmosphere. Deforestation, releases CO2 to the atmosphere because carbon stored in the ...

Anopheles gambiae s.s. Giles, a highly anthropophilic mosquito species, is Africa's most important malaria vector (White, 1974). It has been shown that this species is attracted to 4.5% carbon dioxide (Knols et al., 1994a), a dose thought to be equivalent to what is emitted by humans during breathing. Also, evidence exists for an activating and attracting effect of carbon dioxide in the field (...

Fractional erbium (Er:YAG) and carbon dioxide (CO2) lasers are ablative fractional resurfacing systems widely used to improve the appearance of wrinkles and atrophic scars. However, there have been limited studies comparing the clinical outcome and adverse effects of these two lasers. We conducted a prospective, randomized trial to compare the efficacy and safety of fractional erbium and carbon...

Sporocarp production is essential for ectomycorrhizal fungal recombination and dispersal, which influences fungal community dynamics. Increasing atmospheric carbon dioxide (CO2) and ozone (O3) affect host plant carbon gain and allocation, which may in turn influence ectomycorrhizal sporocarp production if the carbon available to the ectomycorrhizal fungus is dependant upon the quantity of carbo...

Carbon dioxide (CO2) is the foremost gas, emanated from human activities, and the best-known greenhouse gas, contributing to global warming, thus its negative effect on human health cannot be disregarded. The current paper investigates the relation between environmental quality variables, socio-economic factors, and human health from 1960 to 2014 in China, using Auto Regressive Distribution Lag...

Carbon dioxide (CO2) is the foremost gas, emanated from human activities, and the best-known greenhouse gas, contributing to global warming, thus its negative effect on human health cannot be disregarded. The current paper investigates the relation between environmental quality variables, socio-economic factors, and human health from 1960 to 2014 in China, using Auto Regressive Distribution Lag...