Elemental oxygen also reacts with some compounds. If it is possible to oxidize any of the elements in a given compound, further oxidation by oxygen can occur. For example, hydrogen sulfide, H2S, contains sulfur with an oxidation state of 2-. Because the sulfur does not exhibit...
;hemoglobin 素;helium氦;ammonia氨,阿摩尼亚;glucose葡萄糖;CO2 化碳;O2;breathing呼吸; 词组| 习惯用语 oxygen content 含量, 含量 dissolved oxygen溶解 dissolved oxygen (DO)溶解 dissolved oxygen (do)溶解 oxygen consumption耗 量, 消耗 oxygen supply供 ...
Hemoglobin combines with carbon monoxide (in carbon monoxide poisoning) to form the stable compound carboxyhemoglobin, which renders hemoglobin unable to bond with oxygen and results in hypoxia of tissues. Oxidation of the ferrous iron of hemoglobin to the ferric state produces methemoglobin. Hundreds...
In contact with venous blood, oxygen combines more readily with myoglobin than it does with hemoglobin, favoring the transfer of oxygen frombloodto muscle cells. Thus, the oxygen that the working muscle requires for the energy-producing biochemical reactions is provided. The significance of myoglobin...
To put it as simply as possible, glucose, the primary fuel, combines with oxygen to yield energy that drives the function of the cell in which the oxidation takes place. Just like the analogy of the newspaper, the combination of glucose with oxygen has to be “ignited”. Thiamine and ...
In combination with hydrogen, it forms water; by weight, 90 per cent of water is oxygen. It is the third most abundant of all the elements of nature. Large quantities of it are distributed throughout the solid matter of the earth because it combines readily with many other elements. With...
Oxygen combines with most elements, is required for combustion, and is essential for life in most organisms. Atomic number 8. See Periodic Table. Word History In 1786, the French chemist Antoine Lavoisier coined a term for the element oxygen (oxygène in French). He used Greek words for the...
The extracellular hemoglobin of Lumbricus terrestris is composed of four kinds of heme-containing chains in equimolar proportions. Each combines reversibly with oxygen. Three of the chains form a disulfide linked trimer. Oxygen equilibria of the intact molecule are consistent with previous reports (1,...
4 Pyrroles come together for the formation of protoporphyrin IX. In turn it combines with iron for the formation of heme molecule Each of the heme molecule associates with a long polypeptide chain to form a subunit of Haemoglobin referred to as Haemoglobin chain ...
Reactive ion etching (RIE) is another type of etching approach that combines plasma and ion milling. RIE has higher etching affinity due to the continuous bombardment of ions, and 5 s (30 W, 26.5 Pa) was reported to totally remove a monolayer graphene from its substrate [105]. Oxygen ...