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==Eh-pH graph== ...stem-quality-and-performance_fig9-49.png|300px|thumb|{{figure number|2}}Eh–pH diagram showing the approximate distribution of various types of subsurface

...n terrestrial environments. Nutrient replenishment, sunlight, temperature, pH and Eh of waters, sediments, and soils influence biological productivity.

...2.png|300px|thumbnail|'''Figure 2.''' Critical velocity determination with pH monitoring]] ...The pH of the [[effluent]] was monitored throughout the test. The constant pH value indicated that no chemical reaction was occurring between the rock an

...g2.png|300px|thumb|{{figure number|2}}Critical velocity determination with pH monitoring.]] ...ty. The pH of the effluent was monitored throughout the test. The constant pH value indicated that no chemical reaction was occurring between the rock an

...y into the system to control fluid losses. Caustic soda (NaOH) is used for pH control, and the density is adjusted with weight materials. ...lack of dispersants. Nondispersed drilling muds do not require an elevated pH. By not having a dispersant present, they are less tolerant of solids and c

| K || 220 || pH || 6.45

* pH increases above 9 due to photosynthesis and respiration of a reef biomass

...oil and gas content of local traps / I.I. Nesterov [et al.], Moscow: Nedra PH, 196 p. ...atform / Materials on geology and mineral resources of East Siberia, Nedra PH, 171 p.

...r secondary alteration anomalies (soil carbonate, iodine, trace metal, Eh, pH, electrical, magnetic, geobotanical, etc.) is less well understood. The cau

...attice defect. || In carbonates, color zoning can be related to complex Eh-pH history. In clastics, lattice defect and activator ion content used in prov

...nd basin evolution of the Late Paleozoic Taos trough, northern New Mexico: Ph. D. Dissertation, The University of Texas at Austin, 236 p.</ref><ref name=

...on many factors including salinity, hydrocarbon composition, temperature, pH, pressure and moisture.

...biodegradation, physical abrasion, and chemical changes related to Eh and pH in the water column and in sediments. Individual organic matter constituent

...0., 1016/0016-7037(61)90069-2</ref> and the [[pristane-phytane ratio]] (Pr/Ph). The following figures show gas chromatograms of the [[Wikipedia:Saturate,

...sorption of folic acid in the stomach; it helps in maintaining the stomach pH and in the detoxification of the stomach. ...he release of these metal ions for plant use as a result of alterations in pH and redox conditions. By consuming plants and animals raised on such soils,

...modelling of the fluid flow history: Llanos Basin of Colombia case study: Ph.D. thesis, Université Pierre et Marie Curie (UPMC) Paris, 182 p.</ref>; Go ...z et al., 1986<ref name=Doligezetal1986>Doligez, B., F. Bessis, J. Burrus, Ph. Ungerer, and P. Y. Chenet, 1986, Integrated numerical simulation of sedime

...vaporite minerals, such as gypsum, anhydrite, [[halite]], and sylvite. The pH of lake is about 6 to 9, but it can become acidic in some volcanic lakes, a

...sent, and photosynthesis and/or respiration of reef organisms increase the pH of pore waters to values greater than 9

...Group in the offshore Gippsland Basin for CO₂ geosequestration: Ph.D. thesis, University of Adelaide, Adelaide, Australia, 265 p.</ref> The na ...dioxide: Examples of potential sites from northwest Australia: Unpublished Ph.D. thesis, University of Adelaide, Adelaide, Australia, 258 p.</ref>]]