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Dissertations / Theses on the topic 'Physico-chemical factors'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

McKinney, Sheena. "Physico-chemical factors influencing fermentation of polysaccharides in the gut." Thesis, University of Ulster, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274027.

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2

Allen, S. E. "Physico-chemical factors influencing calcium oxalate crystallisation in the urinary tract." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1310135/.

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The current treatment for urolithiasis is mostly limited to removing stones rather than preventing their formation. This research investigated a range of bisphosphonates for their inhibitory properties on the crystallisation of calcium oxalate - the commonest constituent of urinary calculi. Calcium oxalate crystals were generated in a well-recognised artificial urine solution (Robertson WG et al. J. Urol 1986; 135:1322-1326) using the Mixed Suspension Mixed Product Removal system. This provided a reliable, reproducible environment closely comparable to urine within the pelvi-calyceal system of

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Bezuidenhout, Chantel. "Macrophytes as indicators of physico-chemical factors in South African Estuaries." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1387.

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This study investigated the response of macrophytes to physico-chemical factors in seven South African estuaries and showed that dominant salt marsh species that occur in different estuaries respond to the same environmental factors. The most important variables influencing distribution were elevation, water level, sediment- and groundwater electrical conductivity and depth to the water table. In permanently open estuaries (Kromme and Olifants) transect surveys identified three distinct vegetation zones i.e. submerged macrophytes, intertidal salt marsh and supratidal salt marsh. In the Kromme

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4

Roy, Shouvik. "Mechanistic studies of physico-chemical stability of model therapeutic proteins using pharmaceutically relevant factors /." Connect to full text via ProQuest. IP filtered, 2006.

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Thesis (Ph.D. in Pharmaceutical Sciences) -- University of Colorado at Denver and Health Sciences Center, 2006.<br>Typescript. Includes bibliographical references (leaves 161-173). Free to UCDHSC affiliates. Online version available via ProQuest Digital Dissertations;

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5

Ochoa, Loza Francisco Javier 1956. "Physico-chemical factors affecting rhamnolipid (biosurfactant) application for removal of metal contaminants from soil." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282826.

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Contamination of soil and groundwater environments by toxic metals and organic compounds is of major concern because of the potential health hazard posed for humans. Remediation of such sites may require the addition of chemical agents that help in the mobilization of contaminants which are likely to be bound to solid surfaces. Surfactants are one of the agents proposed for addition to enhance the removal of soil-bound contaminants. In this dissertation, a series of laboratory experiments were conducted to investigate constraints to the potential application of a microbially produced surfactan

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6

Watkins, Siobhan. "Physico-chemical and microbial factors affecting the operation of a package wastewater treatment plant." Thesis, University of Portsmouth, 2011. https://researchportal.port.ac.uk/portal/en/theses/physicochemical-and-microbial-factors-affecting-the-operation-of-a-package-wastewater-treatment-plant(964c4c5f-6456-421a-8d8f-b949ea9ef6f8).html.

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The Biologically Engineered Single Sludge Treatment (BESST) system is a small package wastewater treatment plant, which is designed to reduce influent concentrations of ammoniacal nitrogen, biochemical oxygen demand and total suspended solids, to a standard fit for discharge into controlled waterways. This thesis examines the treatment performance of the BESST, while operating under steady state and disruptive conditions, and assesses the contribution of physicochemical and microbiological factors to treatment efficacy. The design of the BESST was based on principles of activated sludge proces

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7

Joseph, Michael Vadakekara. "Extrusion, physico-chemical characterization and nutritional evaluation of sorghum-based high protein, micronutrient fortified blended foods." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32907.

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Doctor of Philosophy<br>Department of Grain Science and Industry<br>Sajid Alavi<br>The feasibility of using a wheat flour mill to refine corn, sorghum and cowpea was studied. Milling of white sorghum grain resulted in decrease in fiber content from 1.89% to 0.38% and 0.45% in raw, finely milled and coarsely milled sorghum respectively. Similarly, there was a reduction in fat (3.17% to 1.75% and 0.51%) content from raw to fine and coarse milled fractions. Starch content increased from 61.85% in raw to 69.80% in fine and 72.30% in coarse fractions. Protein content was almost unchanged at about 7

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8

Muñoz, Ramos Valentina. "Relationship between toxic cyanobacterial blooms, physico-chemical factors and multiple source excreta contamination in affected watershed." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117190.

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Missisquoi Bay (MB) is a temperate eutrophic freshwater ecosystem located in an agricultural watershed and it frequently experiences toxic Microcystis-dominated cyanobacterial blooms. Cyanobacterial population dynamics are influenced by a plethora of factors that may differ from system to system, requiring a site-specific assessment of bloom-promoting factors to design more effective bloom prevention or remediation strategies. This is the first biomonitoring study that combined data from high-throughput 16S rRNA gene amplicon sequencing, qPCR and environmental parameters from temporal and spat

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9

Imam, Abdullahi A. "Role of physico-chemical environmental factors in the emergence and development of insecticides resistant mosquito in Nigeria." Thesis, University of Abertay Dundee, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.656339.

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The aim of this study is to investigate the role of physico-chemical environmental factors present in mosquito breeding ecologies as sources of selection pressure for the emergence and development of insecticides resistance in Anopheles gambiae from Northern Nigeria. Prospecting for, and sampling of An. gambiae larvae was carried out from many breeding sites in towns and villages spread out across Kano and Jigawa states of Northern Nigeria. The breeding sites visited and sampled were grouped into three study zones according to the type of human related activities taking place around the mosqui

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10

Arendse, Brittany. "Physico-chemical factors influencing the spatial and temporal distribution of the seagrass Zostera capensis in Langebaan lagoon." Bachelor's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/25942.

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Seagrass meadows have important ecological roles in coastal ecosystems and provide high-value ecosystems services compared to other marine and terrestrial habitats. Despite this, there is growing evidence that this key ecosystems is declining on a global scale. Much of these declines have been attributed to the effects of human alterations of marine habitats. Continued destructive activities, in both South Africa and elsewhere, if not managed properly will result in the demise of seagrass beds from coastal areas. With this in mind, the aim of the project is to determine the main physico-chemic

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11

Jones, Lisa A. 1976. "Influence of physico-chemical factors on the distribution and biomass of invasive mussels in the St. Lawrence River." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82257.

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Biological invasions threaten the stability and biodiversity of freshwater ecosystems worldwide. The impacts of an invading species often vary across systems, making their prediction difficult. When data from multiple invaded sites are available, statistical models can be developed to correlate an invader's distribution and abundance with local environmental variables; such models could then provide managers with useful tools to help prioritize efforts to control the invader. The introduction of the zebra mussel (Dreissena polymorpha) and quagga mussel (D. bugensis) to North America ran

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12

Chulayo, Amanda Yucca. "Effects of pre-slaughter sheep handling and animal-related factors on creatine kinase levels and physico-chemical attributes of mutton." Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/433.

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Effects of pre-slaughter sheep handling and animal-related factors on Creatine Kinase levels and physico-chemical attributes of mutton By Chulayo Amanda Yucca The objective of the study was to determine the effects of pre-slaughter sheep handling and animal-related factors on Creatine kinase (CK) levels and physico-chemical characteristics of mutton from South African sheep breeds. One hundred and seventy-three castrated male sheep from four breeds (15 Dormer, 46 South African Mutton Merino, 77 Dorper and 35 Blackhead Persian) were used. The animals were grouped according to age categories. Th

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13

Mellina, Eric. "Patterns in the distribution and abundance of zebra mussels (Dreissena polymorpha) in the St. Lawrence River in relation to substrate and other physico-chemical factors." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69641.

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Using SCUBA and an in situ method of quantifying substrate characteristics, I describe patterns of zebra mussel (Dreissena polymorpha) distribution along the St. Lawrence and Hudson Rivers and in Oneida Lake, New York, and develop empirical models for their abundance. Calcium-poor waters originating from rivers draining the Canadian Shield resulted in a lack of zebra mussel along the north shore of the St. Lawrence River east of Montreal until Portneuf despite an abundance of suitable substrate. Calcium concentrations of 15 mg/L or less were found to limit the distribution of zebra mussel. The

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14

Nyalungu, Nonhlanhla P., Allan N. Hodgson, Pierre William Froneman, M. Dopolo, and M. Masubelele. "Temporal and spatial variability in the abundance, biomass and distribution of Palaemon peringueyi (Decapoda: Crustacea) are influenced by biological but not physico-chemical factors in the permanently open Kariega Estuary, South Africa." Taylor & Francis, 2014. http://hdl.handle.net/10962/68106.

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Publisher version<br>Biological and physico-chemical factors affecting abundance and biomass of shrimp Palaemon peringueyi were investigated in 2010–2011 in the lower, middle and upper reaches of the freshwater-deprived permanently open Kariega Estuary. Shrimp abundance and biomass ranged from 0 to 88 ind. m−2 and 0 to 4.4 g wwt m−2, respectively. Shrimps were most abundant in the lower reach, and highest abundances and biomasses were recorded in the lower reach in June when salinities were low. The shrimps were almost always absent in the upper reach. Juveniles were found mostly in the lower

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15

Trombetta, Thomas. "Initiation des efflorescences phytoplanctoniques en zone côtière : le rôle de la température et des interactions biologiques." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG088.

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Dans les écosystèmes marins des zones tempérées, la majeure partie de la production primaire annuelle est générée au printemps lors de phénomènes d’accumulation rapide de biomasse phytoplanctonique, appelés efflorescences, supportant la diversité et le fonctionnement de ces systèmes. Plusieurs mécanismes physico-chimiques et biologiques expliquant l’initiation des efflorescences phytoplanctoniques sont évoqués pour ces écosystèmes. En revanche pour les zones côtières peu profondes sous influence de forçages complexes, les mécanismes à la base de ce phénomène restent encore mal connus. L’object

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16

Craig, Tracy-Ann. "Kidney stone rarity in South Africa's black population : investigation of the biochemical and physico-chemical properties of Tamm Horsfall Mucoprotein as a possible contributory factor." Doctoral thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/7443.

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Includes bibliographical references.<br>Tamm Horsfall mucoprotein (THP) is a powerful inhibitor of calcium oxalate crystallisation. Since urolithiasis in South African blacks is extremely rare, this study was undertaken to compare the relative inhibitory and biochemical properties of this protein in South African black and white healthy and stone—forn1ing male subjects. THP was isolated by salt precipitation, puriﬁed by column chromatography and veriﬁed by electrophoresis on SDS-polyacrylamide gels. MALDI-TOF mass spectroscopy was used to determine the molecular weights of the protein from eac

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17

Nocito-Gobel, Jean. "Physico-chemical factors affecting the transport of colloidal particles in groundwater systems." 1997. https://scholarworks.umass.edu/dissertations/AAI9809376.

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Increasing attention has been given to the role of colloids in accelerating contaminant transport as evidence of significant subsurface transport of contaminants continues to be presented. Colloid migration models typically include the processes of advection, dispersion, deposition and release. Present models are limited in their ability to predict the transport and fate of colloids due to limited understanding of the interaction between these processes. The objective of this research is to gain a better understanding of the physical/chemical factors which affect the transport of colloidal par

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18

Musharova, Darya. "The Effect of Physico-Chemical Factors on the Stability and Transport of Clay Particles." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11065.

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Clays which exist in formations in the vicinity of injection and disposal wells is a worldwide problem in the petroleum industry. Clays can be categorized as two major groups: swelling clays, which include smectite group clays, and dispersing clays, which include the kaolinite groups of clays. Therefore, two basic damage mechanisms of clay minerals are swelling and dispersion. Both mechanisms cause pore plugging, and thus aggravate hydrocarbon ease of flow. In this thesis, the effect of temperature, injected water chemical composition, pH, and flowrate of the injected fluid were tested ex

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19

Chan, tak-hung, and 陳德鴻. "The Relationship between Physico-Chemical Factors and Fish Bio-indicator in Kao-Ping River Basin." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/27184747852684183068.

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碩士<br>大仁科技大學<br>環境管理研究所<br>96<br>The purpose of the study is to identify the relationship between Physics-Chemic factors and bioindicators. In the study, eight time ecological survey have carried out during the period from July, 2005 to February, 2007 at 32 locations on Kao-Ping Basin. The investigation items of ecological survey include hydrology, composition of river bed, ecological habitat in the stream and kinds of fish in the aquatic ecosystem. The fish amounted to 8374 fishes was surveyed in the investigation. Those fish can be divided into 65 Species and 23 Family. Among, Cyprinidae fis

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20

Rami, Reddy P. Mohan. "Role Of Physico-Chemical Factors In The Heave And Collapse Behaviour Of Laboratory Desiccated Soils." Thesis, 1996. http://etd.iisc.ernet.in/handle/2005/1684.

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21

木戸秋, 悟., and Satoru Kidoaki. "Physico-Chemical Studies on the Regulatory Factors of Folded Structure of Single Giant Duplex-DNA Chains." Thesis, 1998. http://hdl.handle.net/2237/15730.

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22

吳文欽. "The effects of several physico-chemical factors on the bioluminescence of different strains of photobacterium leiognathi." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/79196354017792536529.

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23

Lien, Yu-Wei, and 連育瑋. "Study on the phytoplankton and its relationships with marine physico-chemical factors along the Kaoping Canyon southwest of Taiwan." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/71612503719212078125.

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碩士<br>國立臺灣大學<br>海洋研究所<br>85<br>This study was carried out at 2 to 6 stations along the Kaoping Canyonsouthwest of Taiwan during the periods of June and December of 1995 andDecember of 1996. The standing crop(in cell number) and species compositionwere determined microscopically, while the size distribution pattern ofphytoplankton at various depths was determined on the basis ofsize-fractionated chlorophyll a. The variability of chlorophyll-biomass wasrelated to some important physico-chemic

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24

Tsai, Ming-wei, and 蔡明偉. "Studies on electroconvection control of electrodialysis to treat copper wastewater and transfer characteristics of cation exchange membrane by different physico-chemical factors." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/81214088369668819106.

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碩士<br>朝陽科技大學<br>環境工程與管理系碩士班<br>96<br>This research works on utilizing an electrochemical analyzer to determine ionic transport characteristics of the cationic exchange membrane and evaluating the feasibility of treating copper wastewater by the electrodialysis system under electroconvection control. Results based on different copper concentration exhibit that the occurrence time of limiting current density is irrelevant to the copper concentration and there is a proportional relationship between limiting current density and the copper concentration. This illustrates that the concentration di

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25

Κατσαργύρη, Χριστίνα. "Μελέτη περιβαλλοντικών παραμέτρων στη λιμνοθάλασσα της Κλείσοβας". Thesis, 2008. http://nemertes.lis.upatras.gr/jspui/handle/10889/818.

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Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η μελέτη των περιβαλλοντικών παραμέτρων της λιμνοθάλασσας της Κλείσοβας, η οποία βρίσκεται στο ανατολικό άκρο του λιμνοθαλάσσιου συστήματος του Μεσολογγίου. Στο πρώτο στάδιο γίνεται επεξεργασία των περιβαλλοντικών δεδομένων με χρήση μεθόδων πολυδιάστατης στατιστικής ανάλυσης με σκοπό τον καθορισμό των κύριων διεργασιών που αναπτύσσονται στις υδάτινες μάζες της λιμνοθάλασσας με ιδιαίτερη έμφαση στον εντοπισμό διάφορων ρυπογόνων διεργασιών. Στο δεύτερο στάδιο γίνεται η επεξεργασία των περιβαλλοντικών δεδομένων με χρήση του αλγορίθμου CLEAN κ

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26

Paumier, Sandrine. "FACTEURS DETERMINANT L'ORGANISATION ET LA RHEOLOGIE DU SYSTEME ARGILE-EAU POUR DES SUSPENSIONS DE SMECTITES." Phd thesis, 2007. http://tel.archives-ouvertes.fr/tel-00263559.

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Les smectites en suspension aqueuse sont des argiles gonflantes largement utilisées dans l'industrie pour leurs capacités d'adsorption, d'étanchéité, de transport ou de liant. Ces propriétés sont inégales en fonction des caractéristiques minéralogiques et physico-chimiques des suspensions. Ce travail a pour but de comprendre l'action de la charge interfoliaire sur les structures construites par le système eau argile en fonction de la concentration pour des smectites homoioniques ou mixte. Son originalité est de coupler des méthodes minéralogiques, physico-chimiques et une large gamme d'essais

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27

Iloms, Eunice Chizube. "Investigating industrial effluent impacts on municipal wastewater treatment plant." Diss., 2018. http://hdl.handle.net/10500/25877.

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Industrial effluents with high concentrations of heavy metals are widespread pollutants of great concerns as they are known to be persistent and non-degradable. Continuous monitoring and treatment of the effluents become pertinent because of their impacts on wastewater treatment plants. The aim of this study is to determine the correlation between heavy metal pollution in water and the location of industries in order to ascertain the effectiveness of the municipal waste water treatment plant. Heavy metal identification and physico-chemical analysis were done using Inductively Coupled Plasma Op

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