Microarray-based whole-genome hybridization as a tool for determining procaryotic species relatedness Page: 4 of 59
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
1 Kowalsky, 2005) shows the phase diagram as defined by the PH - TH equilibrium of
2 methane hydrate (the dominant gas in natural hydrate deposits). A pressure decrease due
3 to lowering of the sea level, or an increase in the temperature of the ocean water in
4 contact with the seabed, could induce hydrate dissociation and lead to the release of gas.
5 The released CH4 could be transferred to the exchangeable carbon reservoir by ebullition
6 or diffusion into the water column, advection by the water current, chemical and
7 biochemical oxidation reactions in the water column, and finally by ebullition into the
8 atmosphere if the rate of CH4 release were to exceed the rate of oxidation (Kennett et al.,
11 Assessment of the hydrate resource
12 The methane trapped as hydrate in ocean sediments originates from biological
13 sources through decay of organic matter accumulated at the seafloor, or through upward
14 migration of thermogenic methane from deeper deposits. The slow, constant process of
15 "organic rain" provides a source for methanogenesis, and the resulting methane moves
16 into benthic sediments via burial and compaction of sediments and fluid flow within
17 sediments (Gornitz and Fung, 1994; Xu and Ruppel, 1999; Buffett and Archer, 2004).
18 This methane may combine with seawater to form methane hydrate wherever temperature
19 and pressure conditions are suitable. Hydrates found in the deep ocean (> 1000 m) have
20 been the primary focus of most previous investigations. Such hydrates are clearly stable
21 because of pressures well above, and temperatures below, the hydrate Lw+H+V phase
22 boundary (see Figure 1). Stable hydrate may also exist closer to the surface--experimental
23 phase diagrams and ocean drilling evidence indicate a gas hydrate stability zone (GHSZ)
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Wu, L.; Liu, X.; Fields, M.W.; Thompson, D.K.; Bagwell, C.E.; Tiedje, J. M. et al. Microarray-based whole-genome hybridization as a tool for determining procaryotic species relatedness, article, January 15, 2008; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc899263/m1/4/: accessed April 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.