Leaves use sunlight to change water and CO2 into oxygen (氧气). The process is known as photo-synthesis (光合作用). A chemical called chlorophyll (叶绿素) helps make this happen. Chlorophyll is the reason why leaves are green summer. However, Canadian winters are long, cold and dark. There...
Fish ___ oxygen through their gills(鳃). III.单项填空: () 1. Air pollution can affect humans by___ sore eyes and respiratory problems, especially in children and___. A. cause, the old B. causing, the older C. causing, the elderly D. cause, the elderly ()...
Estuarine and coastal ocean carbon paradox: CO2 sinks or sites of terrestrial carbon incineration? Estuaries are a major boundary in the land-ocean interaction zone where organic carbon (OC) and nutrients are being processed, resulting in a high water-to... WJ Cai - 《Annual Review of Marine...
(2008) Turnover of oxygen and hydrogen isotopes in the body water, CO2, hair, and enamel of a small mammal. Geochim Cosmochim Acta 72: 19-35.Podlesak D. W., Torregrossa A., Ehleringer J. R., Dearing M. D., Passey B. H. and Cerling T. E. (2008) Turnover of oxygen and ...
enzymes capture photons that in turn energize electrons. The researchers noted that this system suffers from three main inefficiencies. The first is that the photosystems have overlapping absorption spectra. The second is that the oxygen produced by photosystem II has to compete with carbon dioxide ...
- 1992 () Citation Context ...l, creating a relative oxygen rich zone in the rhizosphere. Methane produced by methanogenic bacteria in the soil is partly oxidized in the rhizosphere to CO2 by methanotrophic bacteria (Conrad 1993; =-=Frenzel et al. 1992-=-; Chanton et al. 1997; Bilek ...
aThe falling in oxygen (O2) concentration and the carbon dioxide (CO2) concentration increase in short times elapsed between the cells sealing characterize aerobic decomposition processes. 下落在氧气(O2)集中和在短时间的二氧化碳(二氧化碳)集中增量流逝了在密封描绘有氧分解过程的细胞之间。[translate] ...
The researchers used anelectrochemical cellas a flow reactor, separating the gaseous CO2 input and oxygen output from the liquid electrolyte catalyst with gas-diffusion electrodes. The cell design allowed the researchers to fine-tune the composition of the electrolyte stream to improve reaction kinetics...
(4)根据They burn forests to make farms.They clear forests to find minerals(他们焚烧森林来建造农场。他们砍伐森林以寻找矿物)可知此处说明造成雨林消失的人类的活动,选项B"人们为了木头砍树"符合语境。故选B。(5)根据The rich plants there take carbon dioxide(CO2)out of the air and ...
a real-world system, however, the nanowires would absorb light, generate electrons and transport them to the bacteria glommed onto the nanowires. The bacteria take in the electrons and, similar to the way plants make sugars, convert twocarbon dioxidemolecules and water into acetate and oxygen. ...