Plant oxygenation

Some of the most vital processes of living creatures depend on the ability of solutions to pass through a very thin type of skin called a membrane. This is the process of osmosis. Without osmosis, minerals and water from the soil wouldn t get into plants oxygen wouldn t get into our blood, and neither would... 

Fig. 2.12 A colony of Leptothrix ochracea (some 15 cm across) in a small spring (producing 1-2 L water/min) among roots of a tree does locally control access to Fe (and probably Mn, Al, REEs) by this tree and nearby plants. Oxygen is...

Unlike photosynthesis by other organisms, including cyanobacteria, higher algae, and plants, oxygen is not evolved. Hence, this process is referred to as anoxygenic photosynthesis. Perhaps the best evidence that this process was occurring before 3.0-... 

In the presence of light, carbon dioxide and water are used to synthesis sugars and starches. In the higher plants, oxygen is released into the atmosphere. In this study we will be dealing with the somewhat simpler process observed in bacteria, as excellent crystallographic structures are now available to aid in these studies[1,2]. Bacterial photosynthesis does not release oxygen. 

Oxygen entry into the plant varies with plant species. For many wetland plants, oxygen entry into the plant occurs through... 

The two-stage process has been developed by the research group of Wacker s Consortium fiir elektrochemische Industrie. While this group worked on the development of a single-stage process, Wacker had to realize that at the time and the site of the scheduled first commercial plant, oxygen was not available at a reasonable price. So, Wacker was forced to develop another version using air as the oxidant. 

Hydrocarbons found in the wax layer of plants also are synthesized from long-chain fatty acids. C12, C14, Cie, and C18 fatty acids are incorporated into C29 alkanes. Compounds that are efficient precursors for long-chain fatty acids are also efficient precursors of hydrocarbons. Both groups of compounds are synthesized in epidermal cells. Exogenous C30 fatty acid is converted into C29 alkane in cabbage, Brassica oleracea (Brassicaceae), and similar results have now been obtained in a number of other plants. Oxygen is required for this decarboxylation. Further, an a-hydroxy intermediate is involved (Kolattukudy, 1980). 

Linde, Union Carbide, "Claus Plant Oxygen Enrichment," Union Carbide technical bulletin, 1983. 

In green plants oxygen is liberated during this first stage. In photo-trophic bacteria, the oxidizing radical [OH] must be reduced by a hydrogen donor which is specific in each case. 

Chen, J. K., Chow, T. K., Cross, F., Hull, R. L., and Watson, D., 1995, SURE process for Claus sulfur plant oxygen enrichment, paper presented at Sulphur 95, Abu Dhabi, United Arab Emirates, October. 

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