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Tesi sul tema "Algal metabolites in water"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 17 febbraio 2022

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1

Provan, Anne. "Systematic chemical screening of mircroalgae." Thesis, University of Strathclyde, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366955.

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2

Mann, Maryssa Gudrun Ailsa. "An investigation of the antimicrobial and antifouling properties of marine algal metabolites." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1007465.

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Prevention of the accumulation of undesirable biological material i.e. biofouling upon a solid surface requires the use of antifouling systems. The solid surface may be a contact lens, an off shore oil rig or a living organism. When chemicals are employed as a mechanism of defense against biofouling, the agents involved are known as antifouling agents. Marine algae must protect themselves from fouling organisms and it is thought that one of the mechanisms used by these organisms is the production of secondary metabolites with an array of biological activities. In vitro studies have shown numer

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3

Gordon, Richard. "The Role of Water Motion in Algal Reproduction." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/GordonR2001.pdf.

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4

Wissinger, Joshua Clinton. "Hydrothermal Treatment of Algal Feedstocks." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1370954774.

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5

Nylund, Göran M. "Epibiosis of red algae and algal metabolites as settlement inhibitors of the barnacle Balanus improvisus Darwin." Göteborg [Sweden] : Dept. of Marine Botany, Göteborg University, 1999. http://bibpurl.oclc.org/web/20311.

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Thesis (master's)--Göteborg University, 1999.<br>Title from PDF t.p. (viewed on Sept. 25, 2007). At head of title: Tjärno Marine Biological Laboratory. Includes bibliographical references (p. 13-14).

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6

Woodruff, Sarah Louise. "Biomineralisation reactions of algal biofilms at the sediment-water interface." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368647.

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7

Wells, Charles Digby. "Tertiary treatment in integrated algal ponding systems." Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1006162.

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Inadequate sanitation is one of the leading causes of water pollution and consequently illness in many underdeveloped countries, including South Africa and, specifically, the Eastern Cape Province, where cholera has become endemic. As modern wastewater treatment processes are often energy intensive and expensive, they are not suitable for use in these areas. There is thus a need to develop more sustainable wastewater treatment technologies for application in smaller communities. The integrated algal ponding system (IAPS) was identified as a possible solution to this wastewater management probl

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8

Lu, Songhui. "Ecological studies of phytoplankton and harmful algal blooms in Junk Bay, Hong Kong." Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B42576209.

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9

Williams, David Ellis. "Novel secondary metabolites from selected cold water marine invertebrates." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/29175.

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A study of the secondary metabolism of two nudibranchs and one soft coral has led to the isolation of eighteen new and two known secondary metabolites. The structures of all compounds were determined by a combination of the interpretation of spectral data, chemical degradations and interconversions, and single crystal x-ray diffraction analysis. The British Columbian dorid nudibranch Diaulula sandiegensis yielded two new steroidal metabolites, diaulusterols A (41) and B (42). The 25-(3-hydroxybutanoate) residue of diaulusterol A (41) and the 2α,3α-diol array of both 41 and 42 are not commonly

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10

Westensee, Dirk Karl. "Post-treatment technologies for integrated algal pond systems." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018180.

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Integrated Algae Pond Systems (IAPS) are a derivation of the Oswald designed Algal Integrated Wastewater Pond Systems (AIWPS®) and combine the use of anaerobic and aerobic bioprocesses to effect wastewater treatment. IAPS technology was introduced to South Africa in 1996 and a pilot plant designed and commissioned at the Belmont Valley WWTW in Grahamstown. The system has been in continual use since implementation and affords a secondarily treated water for reclamation according to its design specifications which most closely resemble those of the AIWPS® Advanced Secondary Process developed by

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11

West, Charles Edward. "The photodegradation of diazepam and its human metabolites in water." Thesis, University of Plymouth, 2007. http://hdl.handle.net/10026.1/2254.

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In recent years, the environmental occurrence, fate and effects of pharmaceuticals or pharmaceutically active compounds (PhACs) and their metabolites have received increased attention. PhACs have been detected in wastewater, river water, marine waters and even sewage sludge and soil. Since PhACs are developed with the intention of stimulating or inhibiting physiological responses, these findings have prompted concern over their environmental fate and potential adverse effects on nontarget ecological species. The major source of discharge of PhACs to the environment is through sewage treatment

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12

Nielsen, Eric J. "Algal suscession and nutrient dynamics in Elephant Butte Reservoir /." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd741.pdf.

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13

Sirunda, Johannes Jaime. "The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia." University of the Western Cape, 2011. http://hdl.handle.net/11394/5413.

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>Magister Scientiae - MSc<br>In the Otjozondjupa Region, Namibia, water is transferred from Swakoppoort and Omatako Dams into Von Bach Dam to limit evaporation losses and bring water closer to the purification plant. There is a gap in the knowledge about the effects on water quality in Von Bach Dam due to water transfer from Swakoppoort and Omatako Dams, as previous studies on such aspects in the area do not exist. The study objective was to; (a) characterise water quality of the three dams, (b) determine whether water transfers affect the water quality of Von Bach Dam, (c) determine if the tr

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14

Gerlach, Kyle T. "Assessment of Ferrate for Pre-Oxidation Treatment of Harmful Algal Blooms in Drinking Water Treatment." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-theses/1332.

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Abstract (sommario):

Harmful algal blooms in surface water supply systems pose a threat to public health and are increasing in both frequency and geographical distribution. Cyanobacteria can contribute to taste and odor issues and potentially release harmful cyanotoxins into the water. Several treatment methods are currently employed to control these blooms, including physical separation and chemical pre-oxidation. However, existing oxidation options can be costly; increase the release of intracellular material causing the formation of disinfection byproducts; or disrupt coagulation and filtration processes. This

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15

Mailhot, Hélène. "The use of some physico-chemical properties to predict algal uptake of ogranic compounds /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65504.

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16

Conroy, Joseph David. "Testing the algal loading hypothesis the importance of Sandusky River phytoplankton inputs to offshore Lake Erie processes /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1186592400.

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17

Johansen, Richard A. "A holistic approach to monitoring water quality and harmful algal blooms in fresh water using satellite remote sensing." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553251246641376.

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18

Wolf, David M. "Beyond Marginal Valuation: The Economic Impacts of Harmful Algal Blooms." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1529492086337544.

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19

Boggess, Chadwick D. "Optimization of Growth Parameters for Algal Regrowth Potential Experiments." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1234.

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Water cost is one of the key deterrents in making algal biofuels a feasible alternative to traditional petroleum fuels. Research into recycling of algal media was conducted in a laboratory setting at the California Polytechnic State University in San Luis Obispo. A growth assay was created to allow for algal cultures, specifically Ward’s Chlorella sp., to proliferate in sealed culture vessels. Bold’s Basal Medium (BBM) was selected as the media due to its extensive use with freshwater algal strains. However, this medium can limit algal growth through nutrient limitation and it became nece

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20

Hesterlee, Craig D. "Dynamic modeling of West Point Reservoir hydrothermal and algal growth forcing mechanisms." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/20732.

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21

Nielsen, Eric J. "Algal Succession and Nutrient Dynamics in Elephant Butte Reservoir." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/280.

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A water quality model was created for Elephant Butte Reservoir, New Mexico to understand nutrient dynamics and algal response during a three year period. The model chosen for this study was CE-QUAL-W2 because of its proven ability to represent hydrodynamics and the ability to represent multiple algal groups. Elephant Butte has been subject to large algal blooms. This study examined the phosphorus loading into the reservoir to see if it could sustain the observed algal growth. Data showed that the amount of bioavailable phosphorus was more than enough to support large blooms. This study also wa

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22

Wilson, Hugh Edward Campbell. "Short term forecasting of algal blooms in drinking water reservoirs using artificial neural networks /." Title page, abstract and table of contents only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phw7462.pdf.

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23

Razzano, Mandy L. "Monitoring Algal Production in Akron Water Supply Reserviors in Northeast Ohio Using Satellite Imagery." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1310178613.

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24

Crafton, Elizabeth Ann. "Investigation and Management of Cyanobacteria-dominated Harmful Algal Blooms in a Drinking Water Source." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1539688257233302.

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25

Welk, Amber Lee. "A contribution towards real-time forecasting of algal blooms in drinking water reservoirs by means of artificial neural networks and evolutionary algorithms." Click here to access, 2007. http://digital.library.adelaide.edu.au/dspace/handle/2440/48542.

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Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, Discipline of Ecology and Evolutionary Biology, 2008.<br>"December 2007" Bibliography: pages 172-185. Also available in print form.

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26

Dufresne, Laura C. "Destruction of algae-produced taste-and-odor compounds by chlorine, potassium permanganate, and chlorine dioxide." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11242009-020302/.

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27

Sibali, LL, JO Okonkwo, and C. Zvinowanda. "Determination of DDT and Metabolites in Surface Water and Sediment Using LLE, SPE, ACE and SE." Springer Science, 2009. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001502.

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Abstract Surface water and sediment samples collected from Jukskei River in South Africa, were subjected to different extraction techniques, liquid–liquid (LLE), solidphase extraction (SPE), activated carbon extraction (ACE) and soxhlet extraction (SE) for sediment. The samples were extracted with dichloromethane, cleaned in a silica gel column and the extracts quantified using a Varian 3800 GC-ECD. The percentage recovery test for 2,40DDT, DDE and DDD and 4,40DDT, DDE and DDD in water ranged from 80%–96% and 76%–95% (LLE); 56%–76% and 56%–70% (SPE) and 75%–84% (ACE), respectively; while that

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28

Gigante, Bethany Marie. "SALINE ADAPTATION OF THE MICROALGA Scenedesmus dimorphus FROM FRESH WATER TO BRACKISH WATER." Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1382355969.

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29

Graham, Philip Mark. "Modelling the water quality in dams within the Umgeni Water operational area with emphasis on algal relations / Philip Mark Graham." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1022.

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Based on many years of water quality (including algal) and water treatment cost data, available at Umgeni Water, a study was undertaken to better understand the water quality relationships in man made lakes within the company's operational area, and to investigate how water quality affected the cost of treating water from these lakes. The broad aims to the study were to: identify the key environmental variables that were affecting algal populations in lakes; and if these were significant to establish predictive models relating algae to the water quality; and to develop models relating the wate

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30

Athayde, Salena Tatiana Silva. "Algal and bacterial dynamics in waste stabilization ponds and wastewater storage and treatment reservoirs." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343989.

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31

Nilsson, Emmelie. "Algal blooms and water quality in coastal waters of Öland : Possible effect on local tourism?" Thesis, University of Kalmar, School of Pure and Applied Natural Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-1468.

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<p>Utvecklingen av algblomningar i Östersjön har blivit mer diskuterat i media under senare år. Eftersom algblomningar ofta infaller samtidigt som turistsäsongen så har områden som är beroende av turistnäringen drabbats hårt. Under sommaren 2005 inträffade massiva giftiga algblomningar i Östersjön, och detta påverkade turismen på Öland negativt ur ekonomisk synpunkt. Mänsklig påverkan är ansedd vara huvudorsaken bakom den ökade förekomsten av algblomningar i Östersjön. Målet med detta projekt är att undersöka hur förekomsten av algblomningar påverkar turismen på Öland. Genom att ha samlat in v

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32

Jeon, Youchul. "Understanding the Impacts of Harmful Algal Blooms on Biologically-Active Filtration for Drinking Water Treatment." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1596730692085583.

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33

Rahman, FM Arifur. "USING SATELLITE OBSERVATIONS TO ASSESS SUSPENDED SEDIMENT, ALGAL AND CYANOBACTERIA COMPOSITION IN LAKE ONTARIO." Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1626455092080768.

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34

Pruyn, Marley. "Qualitative Detection of Selected Designer Drugs and Relevant Metabolites in Environmental Water Samples." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2571.

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Designer drugs are compounds which have been synthetically derived from illicit drugs. After consumption, drugs and their metabolites are introduced into the sewage water which is treated and disposed into the environment. A combined target, suspect and non-target workflow was created to detect designer drugs in environmental water samples. Multiple water samples were spiked with an unknown mixture of drugs and metabolites to assess the efficiency of the method. Samples were collected from sewage influent and effluent pipes, downstream from a sewage outfall and reclaimed water. Analysis was co

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35

Zeckoski, Rebecca. "Water quality modeling for the Kennet and Avon Canal, a navigational canal in an inland catchment." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/226858.

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The Kennet and Avon Canal in southern England is experiencing severe water quality problems caused by inorganic sediment and algae. These water quality problems are affecting the angling sport of fishermen downstream of the confluence of the canal with the River Kennet. The Environment Agency has been called upon to remedy these issues, but before proceeding they desire a computer model capable of predicting the water quality impacts of various scenarios under consideration. No such model was available to them. This project identified the key solids generation and transport processes to be inc

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36

Carrim, Ayesha Hamid. "The effect of pre-ozonation on the physical characteristics of raw water and natural organic matter (NOM) in raw water from different South African water resources / Ayesha Hamid Carrim." Thesis, North-West University, 2006. http://hdl.handle.net/10394/21.

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Research in the use of ozone in water treatment conducted by many authors support the idea that the nature and characteristics of natural organic matter (NOM) present in raw water determines the efficiency of ozonation in water purification. An ozone contact chamber was designed and made to allow pre-ozonation of water to take place. The concentration of ozone in the chamber was determined using the Indigo method. For the duration of one year, water samples were collected from four different sampling sites and analyzed to determine their overall ecological status with regard to several variabl

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37

Scott, Robert Nigel. "Algal and related biological studies of reservoirs in South Wales with reference to management of water treatment systems." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238187.

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38

Öfverman, Charlotte. "Progesterone metabolites : learning, tolerance, antagonism & metabolism." Doctoral thesis, Umeå universitet, Obstetrik och gynekologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-27064.

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Progesterone metabolites as allopregnanolone, isoallopregnanolone and tetrahydrodeoxy-corticosterone (THDOC) are increased in the luteal phase of the menstrual cycle, throughout pregnancy and during stress. Allopregnanolone and THDOC are neurosteroids with 3α-hydroxy, 5α-configurations and positive modulating effect on the GABAA receptor. They have similar properties and effect, and share the same binding sites on the GABAA receptor. Isoallopregnanolone has a 3β-hydroxy, 5α-configuration and a diverse effect as a proposed antagonist to both allopregnanolone and THDOC. Neurosteroids are thought

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39

Vogiazi, Vasileia. "Developing Electrochemical Aptamer-based Biosensors for Quantitative Determination of Cyanotoxins in Water." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613751183300163.

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40

Wood, Joseph. "Causes and Consequences of Algal Blooms in the Tidal Fresh James River." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3429.

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This dissertation includes 3 chapters which focus on algal bloom of the tidal fresh James River. The first chapter describes nutrient and light limitation assays performed on algal cultures and draw conclusions about long-term patterns in nutrient limitation by comparing results with a previous study . This chapter also describes the influence of riverine discharge upon nutrient limitation in a point-source dominated estuary. This chapter was published in Estuaries and Coasts (Wood and Bukaveckas 2014). The second chapter presents the first comprehensive assessment of the occurrence o

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41

Cilliers, Anneke. "The treatment of brewery effluent using an integrated high rate algal ponding system." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005177.

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The application of high rate algal ponds (HRAP) in the treatment of brewery effluent that met the South African Department of Water Affairs and Forestry's (DWAF) general limits for discharge into a natural water resource of 1998 were tested during a lO-month baseline phase, followed by an 11-month optimization phase. The objective of the baseline phase was to monitor the seasonal performance of HRAPs. The hydraulic retention time (HRT) fluctuated between 11.16 d and 12.00 d in HRAPs. The chemical oxygen demand (COD) increased from 130.12 ± 6.94 mg/L (post-AD), to 171.21 ± 7.99 mg/L (post-HRAP)

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42

Roberts, Joanne B. "Determination and identification of drug and chemical metabolites in waste water by LCMS/MS." Thesis, Glasgow Caledonian University, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.726806.

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43

Schock, Kevin A. "An analysis of a persistent isotherm tilt during early-spring and its effect on the diatom bloom : Lake Washington, Seattle, WA /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/10177.

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44

Lu, Songhui, and 呂頌輝. "Ecological studies of phytoplankton and harmful algal blooms in Junk Bay, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B42576209.

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45

Ewerts, Hendrik. "Effectiveness of purification processes in removing algae from Vaal Dam water at the Rand Water Zuikerbosch treatment plant in Vereeniging / H. Ewerts." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4572.

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The aim of this study was to investigate the efficacy of purification processes at the Rand Water Zuikerbosch treatment plant near Vereeniging. Raw water is abstracted via a canal and gravity pipeline from the Vaal Dam (in the upper Vaal River) and purified to ensure it meets the stringent standards set for drinkable water. The first step was to determine the ecological status of the raw water and it was done by measuring chemical, physical and biological variables as well as to identify and enumerate the different algal groups that occur in the raw water. The turbidity of the raw water was lo

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46

Fretwell, Elizabeth A. "The Temporal and Spatial Relationship between Phosphorus and Nitrogen Concentrations, Algal Growth, and Nutrient Sources in the Meduxnekeag River Watershed." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/FretwellEA2006.pdf.

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47

Coogan, Melinda Ann La Point Thomas W. "Bioaccumulation of triclocarban, triclosan, and methyl-triclosan in a North Texas wastewater treatment plant receiving stream and effects of triclosan on algal lipid synthesis." [Denton, Tex.] : University of North Texas, 2007. http://digital.library.unt.edu/permalink/meta-dc-3986.

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48

Roblin, Rachel. "Water Quality Modeling of Freshwater Diversions in the Pontchartrain Estuary." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/693.

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A 1-D tidal, salinity and water quality model that analyzes the general effects freshwater diversions have on the water quality of the Pontchartrain Estuary over a 17-year period is presented here. Using the modeled live algae concentrations in conjunction with the algal bloom probability model results produces an accurate prediction of algal bloom occurrences between 1990 and 2006. The model predicts that the addition of freshwater diversions into Maurepas swamp and increases to flow in the Bonnet Carré Spillway may cause more intense and frequent algal blooms to occur around the Pontch

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Oosthuizen, Marthinus Gerrit Johannes. "Changes in density and composition of algal assemblages over time in two water purification plants / Oosthuizen M.G.J." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8173.

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In recent years, due to a change in the water situation in South–Africa and the effect of eutrophication in our water systems, there has been a significant increase in algal abundance and changes in species composition. The aim of this study was to investigate algal assemblages at two water purification plants with the main focus on dominant species that may pose a problem in the water purification process. Both water purification plants, especially the one at Virginia, experience problems with blue–green bacteria that are toxic and detrimental to water purification. There was also a need to d

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50

King, Leighton R. "The Response of Utah Lake's Plant and Algal Community Structure to Cultural Eutrophication." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7631.

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Human activities have long had a negative impact on the water quality of freshwater lakes around the world. Utah Lake, located in north-central Utah, has been a subject of such impacts, as the lake experiences recurrent harmful algal blooms during the summer months. Lake warnings and closures have made the public increasingly aware of the ecological and economic impact of these blooms. The objectives of this study were to: 1) compare historical and present-day water quality and ecosystem conditions using environmental data contained in sediment cores, 2) identify whether, and when, Utah Lake t

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