Carbon dioxide (CO2) metabolically produced by humans has been widely used as a tracer gas for determining ventilation rates in occupied rooms. Among other necessities, the method requires good estimates of human CO2 generation rates. An empirically derived equation is widely used to calculate the ...
Another conclusion in the IPCC report, though, may come as news to many. If carbon-dioxide emissions were the only means by which humans were changing the climate, 1.5°C of warming would have already come about. As it ...
However, only a few studies have been carried out in which emission rates of CO2 from humans were estimated under typical conditions indoors either by measuring CO2 concentration or using calorimetric methods. In the CO2 concentration method, the outdoor air supply rates are measured and the ...
82岁李奶奶，有主动脉瓣关闭不全，到体检中心体检，在测量血压时，护士小张听得收缩压很清晰150mmHg，舒张压听取过程变音在60mmHg，心分音消失在20mmHg，放气归零，结束血压测量。谈得知李奶奶有高血压家族史，长期饮酒，身高150cm，体重70kg。请问护士小张听取血压，不正确的是（）
Even though terrestrial plants and the global ocean absorb an amount of CO2equivalent to about half of the 40 billion tons of CO2pollution emitted by humans each year, therate of CO2increasein the atmosphere has been steadily accelerating. In the 1960s, the annual growth averaged about 0.8 ppm...
Modulation of neuronal activity by a serotonergic agonist: A pet study in humans Background: To determine whether elevations of plasma norepinephrine (NE) in major depression represent increased sympathetic nervous system (SNS) activity... G Brown,S Kapur,J Meyer,... - 《Biological Psychiatry》 ...
Atmospheric CO2 has increased by more than 100 parts per million since the Industrial Revolution in the mid-1700s, when humans began burning fossil fuels like coal and oil. Human activity has increased CO2 to levels not seen in the past 800,000 years. ...
They are called virgin(原始的) woods; they have never been touched by humans. Shane Jones, a biologist with the U.S. Forest Service, says the trees there were missed by mistake when the surrounding forest was cut down for wood many years ago. That mistake turned out to be a good ...
Why can't humans breathe in outer space? How about on the moon or on Mars? Select the correct answer. Earth's oxygen atmosphere is thought to: 1. have been present since the planet first formed. 2. is thought to hav...
Sugars, lipids, and proteins are primary metabolites in microalgae [3]. Among them, polyunsaturated fatty acids (PUFAs) are essential nutrients, because they cannot be synthesized by humans. PUFAs from microalgae are high-value nutraceuticals and have been widely used as additives in human diets ...