Sentences with phrase «oxygen and hydrogen sulphide»

Not exact matches

Mangrove rivulus, which can live out of the water for extended periods of time (days or weeks, as long as the conditions are moist), uses its specialised jumping technique when water has low oxygen concentrations or high levels of hydrogen sulphide, or to escape predators and search for terrestrial prey such as crickets.

However, hydrogen sulphide in the atmosphere and sulphurous gold complexes in river water are stable only in the absence of free oxygen.

Although the Cambrian explosion generated a large number of new phyla of Earth - type life, it actually crashed in a mass extinction not long after it began when oxygen levels fell and hydrogen sulphide levels rose again so that biodiversity at the family, genus, and species levels was decreasing around 515 million years ago (Gill et al, 2011; and Michael Marshall, New Scientist, January 5, 2011).

Although atmospheric oxygen soon recovered again as photosynthesis and weathering reached a new balance, at about 10 per cent of present - day levels, the oxidative weathering of sulphides on land filled the oceans with sulphate which created abundant food for a group of bacteria that filled the oceans with sewer gas (hydrogen sulphide) toxic to oxygen - loving lifeforms (delaying the development of eukaryotic plants and animals) and turned them «into stinking, stagnant waters almost entirely devoid of oxygen.»

The material is called synthetic molybdenum - sulphide and it goes a step beyond just being an excellent sponge for moisture, it also acts as a semi-conductor and catalyses the split of water molecules into oxygen and hydrogen.

The hydrogen was lost to space leaving highly reactive oxygen to combust reduced carbon (C and CH4) and sulphur (inc sulphide) to acid gases as well as oxidise near surface elemental or ferrous iron to ferric (red) iron.

The oceans lose their oxygen and turn stagnant, releasing poisonous hydrogen sulphide gas and destroying the ozone layer.