Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Physicochemical factors"”.
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Influences of spring type, physicochemical factors and longitudinal changes in freshwater spring invertebrate ecology
Lindir eru einstök ferskvatnsvistkerfi, sem í raun má kalla náttúrulega rannsóknarstofu, þar sem hægt er að sjá hvaða þættir eru mikilvægir fyrir mótun smádýrasamfélaga. Í þessari rannsókn voru sýni tekin úr 22 lindum á eldvirka belti Íslands. Með því að bera saman umhverfisbreytur og …
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The assessment of physicochemical factors influencing phosphorus mineralization and immobilization in an Illinois floodplain soil
… which motivated further investigation of physicochemical parameters that may be influencing the process, namely organic C and inorganic N. The following objectives were subsequently developed: 1) to evaluate the influence of native leaf residue on P reaction dynamics as a function of the C …
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Revisão bibliográfica: efeito dos alimentos e de outros fatores sobre a qualidade da carne de ruminantes
… of this study is to discuss the most relevant physicochemical factors that affect the quality of ruminant beefand the importance of grazing on thebeef quality. The beef industry has been forced to improve the quality of their productsdue to the growing, higher demands of the final consumersthat …
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Factors Influencing The Ecology and Epidemiology of Microbial Indicators and Foodborne Pathogens In Surface Waters and Development of Risk Mitigations
… method, spatial, temporal, meteorological, and physicochemical factors on pathogen prevalence and FIB levels. Key findings highlight that the drivers of prevalence differ between pathogens and were influenced by sample type, scale, and region.. The variations in associations emphasize that risk …
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Biodiversity assessment of groundwater-dependent ecosystems in Malta : evaluating copepods as bioindicators of groundwater health
… one perched, however a clear indication of which physicochemical factors affect their presence was not concluded. Presence of copepods was strongly linked to coastal aquifers, and collection methods could influence the life-stages at which copepods are sampled. This research emphasises the value …
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The Biogeochemistry of Carbon Isotopes in Local Lakes
… would require precise knowledge of fractionation factors associated with algal species and other biological and physicochemical factors, such as pH, temperature, and cell growth rate.
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Spatial and temporal patterns exhibited by select physicochemical and biological water quality parameters in Lake Texoma, Oklahoma and Texas.
… reservoir zones were performed on seventeen (17) physicochemical parameters from each of the eleven sampling stations and phytoplankton count data from one sampling station within each reservoir zone and physicochemical parameters were observed to exhibit a fixed spatial gradient. Strong density …
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Population crash of an endemic South African cyprinid: the role of non-native fish, drought and other environmental factors
… relative influence of different environmental factors on sandfish population trends. The environmental factors considered included other fish in the system, especially three non-native fishes (banded tilapia Tilapia sparrmanii, smallmouth bass Micropterus dolomieu and bluegill sunfish Lepomis …
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FACTORS CONTROLLING NICKEL BIOAVAILABILITY AND EFFECTS ON BENTHIC INVERTEBRATES IN HARDWATER FRESHWATER STREAMS
… demonstrating the importance of a range of physicochemical factors on Ni bioavailability, and the relative importance of the three primary exposure routes: water, sediment, and food.</p>
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The effect of pH and dissolved organic carbon on the growth kinetics of Ac. cupricumulans JTC3 and L. ferriphilum HT pertinent to the BIOX® process
… cupricumulans JTC3. In this study, the effect of physicochemical factors, such as pH and temperature, and the presence of dissolved organic carbon on the growth and ferrous iron oxidation kinetics of these two microorganisms were investigated as potential driving forces behind the compositional …
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Using Silicon Isotopes to Trace the Biogenic Silica in the Southern Ocean
… (bSi) frustules. The use of stable isotopes and physicochemical factors (temperature, light, and trace metal) provides a promising method for understanding how Si and C fluxes will change in response to future climate change. The Si cycle in the Southern Ocean was investigated using an isotopic …
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Using Silicon Isotopes to Trace the Biogenic Silica in the Southern Ocean
… (bSi) frustules. The use of stable isotopes and physicochemical factors (temperature, light, and trace metal) provides a promising method for understanding how Si and C fluxes will change in response to future climate change. The Si cycle in the Southern Ocean was investigated using an isotopic …
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Synthesis of zeolites from geological materials and industrial wastes for potential application in environmental problems
… materials in zeolite synthesis is driven by factors, such as they are cheap and available in bulk quantities, are currently under-utilized, have high workability, and require less water (or solution) for activation. The raw materials were activated by two different routes: (1) classic …
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Sediment-effects on seagrass Zostera muelleri in New Zealand
… both tourism and fisheries economies. Different factors are implicated in causing the decline of seagrass ecosystems, but human activities are clearly identified as one of the major causes of seagrass decline in the world. Humans affect this ecosystem via physical damage (e.g., harbour …
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Μελέτη των σχέσεων μεταξύ των φυσικοχημικών παραγόντων υγειονολογικού ελέγχου και της ολικής μικροβιακής χλωρίδας υδάτινων οικοσυστημάτων: Εφαρμογή στην λίμνη Παμβωτιδα
… total microbial flora and a certain number of physicochemical parameters in a fresh-water ecosystem, is the subject of the present study. The seasonal and daily fluctuation was also investigated. Over November 1985 - October 1988 water samples were examined for the following parameters: …