Thus, deposition graded gradually from anoxic environments below the storm wave base to oxic environments above the storm wave base. |
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In anoxic bank sediments, respiration was also much greater than chemoautotrophy, but was entirely anaerobic. |
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The normal microbiota in this anoxic environment are composed of bacteria, ciliate and flagellate protozoa, and anaerobic chytridiomycete fungi. |
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Both ponds are dystrophic, surrounded by extensive mats of Sphagnum, and stratified in summer with anoxic hypolimnia. |
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The presence of other specialized benthos at the crinoid-bearing localities indicates that the ocean bottom locally was not fully anoxic. |
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So, a strong case exists for substantial de novo protein synthesis in anoxic rice coleoptiles. |
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He allegedly was over sedated and consequently suffered cardiopulmonary arrest with an ensuing irreversible anoxic brain injury. |
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Two weeks later, the patient was brought to hospital after cardiopulmonary resuscitation, with diffuse anoxic brain damage. |
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These data indicate that euxinic conditions were common in the water column during Mesozoic oceanic anoxic events. |
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It was determined that the patient had suffered severe anoxic brain damage as a result of the cardiac arrest. |
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The aim here is also to determine if the root tip removal before submergence would lead to superior anoxic tolerance. |
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This has created over 400 dead-zones, where algal tides turn the sea anoxic for all or part of the year. |
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Possibilities for correlations of regional and global eustatic, anoxic and other events were investigated. |
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Azoic or anoxic sediments could cause a significant shift in pelagic-benthic coupling. |
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The influent solution was sparged continuously with N2 gas to maintain anoxic conditions for the bacteria and to prevent aerobic oxidation of the materials in the wastewater. |
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And one may be sure that their ancestors were a match for the monotonously anoxic habitats of Archaean history. |
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He assumes that anoxic damage to the brain obliterates all consciousness. |
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Low oxygen sites means we can make sites useable again, even though they may be anoxic. |
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Both anoxic and control samples were kept at room temperature in the dark. |
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Most clymeniids and contemporary goniatitids declined before the last anoxic episode, known as the Hangenberg event, which was followed by a major regression. |
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As input to the steady state design and kinetic simulation models for the activated sludge system, the correct value for the heterotroph anoxic yield is essential. |
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As with the water column, anoxic conditions have been created in the sediment. |
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The environment then becomes first hypoxic, then anoxic, thereby satisfying the conditions for the appearance of noxious gases, such as methane. |
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Hazardous substances, such as metals, PCB and PAH, are often found in sediments under hypoxic or anoxic conditions. |
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Sites found to have substandard levels of oxygen in their sediment are rated as hypoxic, or in the worst case anoxic. |
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This process takes places in anoxic environments, such as lake sediments, from which it can be released into the water. |
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Plant material accumulated on the pond bottom, creating anoxic conditions that favored the preservation of terrestrial arthropods such as the millipedes and arachnids. |
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Under anoxic circumstances, however, organic material cannot decay and leaves a dark sediment, rich in organic material. |
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Eruptions or emplacements of LIPs appear to have, in some cases, occurred simultaneously with oceanic anoxic events and extinction events. |
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Many particles combine chemically in a manner highly depletive of oxygen, causing estuaries to become anoxic. |
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In a very short time the oxygen saturation can drop to zero when offshore blowing winds drive surface water out and anoxic depth water rises up. |
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These formations may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus slowing decomposition. |
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Greensand forms in anoxic marine environments that are rich in organic detritus and low in sedimentary input. |
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The group is subdivided into formations, which each represent a turbidite lobe, and are separated by anoxic background sedimentation. |
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Common in some Paleozoic and Mesozoic strata, black shales were deposited in anoxic, reducing environments, such as in stagnant water columns. |
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Half the worlds petroleum reserves were laid down at this time in the anoxic conditions of what would become the Persian Gulf and Gulf of Mexico. |
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The hydrochemical environment shifts from oxygenated to anoxic, as bacterial decomposition of sunken biomass utilizes all of the free oxygen. |
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Because of the anoxic water at depth, organic matter, including anthropogenic artifacts such as boat hulls, are well preserved. |
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These particulates may shade or interfere with gas exchange, or indicate microscale anoxic conditions, all of which could reduce plant growth and lead to fragmentation. |
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As pollen and spores survive best in acidic and anoxic conditions, soils receive less attention from palynologists. |
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Simplistic approaches to assess ecosystem effects assume that all of the secondary benthic production that becomes anoxic or hypoxic is lost to the next trophic level of predators. |
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For example, while it is ideal to establish blood flow immediately to someone with an anoxic brain, the maximum acceptable time to do so is about two minutes before brain cell death and irreversible damage ensues. |
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Needless to say, the convulsive, anoxic, and psychosurgical methods were anathema to him. |
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There's either a pollution problem or there isn't. My information is that at least 15 existing farms have created an anoxic dead zone on the seabed. |
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By early September most of the water below the thermocline was anoxic. |
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The saturation of the moss with water retards passage of air, so that parts of a mass of Sphagnum more than a few inches from the surface are usually anoxic. |
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The increase in ocean temperatures resulting in a decrease in oxygen results in the death of fisheries because these anoxic areas are created that do not have any oxygen. |
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For instance, myxozoan hosts are found in the anoxic environments under the farm and are actually an intermediate host for some of the parasites found in the farms. |
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The presence of elevated levels of organic matter in an anoxic environment at the time of sediment deposition was responsible for concentrating anomalous amounts of mercury. |
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The lower layer is deprived of oxygen and becomes anoxic or anaerobic. |
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Scientists are able to identify the nature and timing of pre-historical climate variations by analyzing the composition of ocean sediment cores of annually laminated sediments from anoxic coastal inlets of British Columbia. |
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In parts of the anoxic process, a concentration of dentrified bacteria is many times higher and provides a significant increase in dentrified capacity. |
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Typically, landfill leachate is anoxic, acidic, rich in organic acid groups, sulphate ions and with high concentrations of common metal ions especially iron. |
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It was also noted that fish kills are not necessarily cryptic events, and kills caused by anoxic events, toxic spills etc are often readily detected. |
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High resolution records of present and past northeast Pacific climate are revealed in cores of annually laminated marine sediments from anoxic coastal inlets of British Columbia. |
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Vast quantities of these remains settled to sea or lake bottoms, mixing with sediments and being buried under anoxic conditions. |
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The deep, anoxic water of the Black Sea originates from warm, salty water of the Mediterranean. |
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Plant species diversity is relatively low, since the flora must be tolerant of salt, complete or partial submersion, and anoxic mud substrate. |
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The Black Sea's lower layers are also anoxic and contain high concentrations of sulphur compounds such as hydrogen sulphide. |
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If enough hydrogen sulfide accumulates in an anoxic zone, the gas can rise into the atmosphere. |
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In many places around the world, dark anoxic shales were formed during this interval. |
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This is evidenced by widespread black shale deposition and frequent anoxic events. |
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On electroencephalogram, she was found to have burst suppression, seen in severe anoxic damage of the brain, and diffuse encephalopathic process. |
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The importance of internal phosphorus load to the eutrophication of lakes with anoxic hypolimnia. |
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Subsurface productivity is limited by nutrient availability, as the anoxic bottom waters act as a sink for reduced nitrate, in the form of ammonia. |
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The mix of anoxic oceans and ocean acidification due to metal loading led to increasingly acidic oceans, which ultimately led to the extinction of benthic species. |
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Though the shelves are usually fertile, if anoxic conditions prevail during sedimentation, the deposits may over geologic time become sources for fossil fuels. |
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Since the aerated anoxic processes used in the VertiCel process nitrifies throughout the entire process, it can be easily retrofittedinto the existing tanks. |
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Stagnation of deep sea currents in middle Cretaceous times caused anoxic conditions in the sea water leaving the deposited organic matter undecomposed. |
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Source rocks for these basins are frequently anoxic shales deposited in restricted lagoonal conditions in Early Tertiary grabens under the back arcs. |
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Effects of cadmium on anoxic survival, haemototogy, erythrocytic volume regulation and haemoglobin oxygen affinity in the marine bivalve Scapharca inaequivalvus. |
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This reduces the levels of oxygen within the sediment often resulting in partially anoxic conditions, which can be further exacerbated by limited water flux. |
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An argon atmosphere fills the case to give an anoxic environment. |
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The exaerobic zone is found at the boundary of anoxic and hypoxic zones. |
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