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Dissertations / Theses on the topic 'Phosphorus ratio'

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Published: 3 June 2025

Last updated: 1 August 2025

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1

Helal, Hamdy Ahmed. "Nitrogen: phosphorus ratio and trophic dynamics in fish-hatchery ponds." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298997255.

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2

Punrattanasin, Warangkana. "Investigation of the Effects of COD/TP Ratio on the Performance of a Biological Nutrient Removal System." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36819.

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The laboratory-scale University of Cape Town (UCT) process was designed to investigate the effects of changing COD/TP ratios on the performance of biological nutrient removal (BNR) processes. Specific objectives of the research were to investigate the effects of COD/TP ratio on the rates of phosphorus removal, COD removal, nitrogen removal, PHB utilization and oxygen uptake. The system was fed with municipal wastewater and operated at 20Â° C. The influent COD concentration was held approximately constant while the phosphorus concentration was varied to obtained the desired COD/TP ratio. Once r

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3

Hadjipanteli, A. "Assessment of the 3D spatial distribution of the Calcium/Phosphorus ratio in bone." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1406401/.

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The purpose of this study was the development of a technique for the non-invasive assessment of the 3D spatial distribution of the Ca/P ratio in bone, which can be applied in a conventional computed-tomography (CT) system, to investigate the variation of Ca/P ratio in healthy and osteoporotic bone, and to potentially enhance osteoporosis understanding and diagnosis. Three-material mass-fraction decomposition CT dual energy analysis (CT-DEA) was developed and optimised for the assessment of Ca/P ratio. As part of this process, density values are provided as a bi-product. The technique was optim

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4

Duckworth, Robyn M. "An Examination of the Cellular Partitioning of Phosphorus in Freshwater Phytoplankton." Bowling Green State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1256929878.

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5

Murasko, Susan Mary. "Particulate carbon, nitrogen and phosphorus stoichiometry of south west Florida waters." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003036.

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6

Garrish, Valerie. "Nitrogen to phosphorus ratio of plant biomass versus soil solution in a tropical pioneer tree, «Ficus insipida»." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103451.

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It is commonly assumed that the N:P ratio of a terrestrial plant reflects the relative availability of N and P in the soil in which the plant grows. Here it was assessed for a tropical pioneer tree, Ficus insipida. Seedlings were grown in sand and irrigated with nutrient solutions containing N:P ratios ranging from < 1 to > 100. The experimental design further allowed investigation of physiological responses to N and P availability. Homeostatic control over N:P ratios was stronger in leaves than in stems or roots, suggesting that N:P ratios of stems and roots are more sensitive indicators

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7

Sattouf, Mamdoh [Verfasser]. "Identifying the origin of rock phosphates and phosphorus fertilisers using isotope ratio techniques and heavy metal patterns / Mamdoh Sattouf." Braunschweig : Bundesforschungsanst. für Landwirtschaft, 2007. http://d-nb.info/996740074/34.

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8

Binoka, Danfung Teresa. "Effect of Phosphorus Fertiliser on Soil Organic Matter Composition of Hill Country Pasture." The University of Waikato, 2008. http://hdl.handle.net/10289/2225.

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Soil organic matter is important as storage for carbon and nutrients, supporting soil structure, and as a filter for pollutants entering the soil ecosystem. The recovery of soil organic matter in depleted soils can take decades, or even hundreds of years. It has been assumed that in non-eroding pasture, soil carbon levels either increase or not change over time. However, some recent studies have suggested that fertiliser addition to pasture soils may contribute to decreases in soil carbon content. My hypotheses were: 1. As P fertiliser loadings increase the soil carbon content and C:N ratio wi

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9

Garcia-Blanco, Susana. "Testing the Resource-Ratio Theory As A Framework Supporting A Bioremediation Strategy For Clean-Up Of Crude Oil-Contaminated Environments." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1098275222.

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10

Deberdt, Gina Luísa Boemer. "Estudo de cianobactérias em reservatório com elevado grau de trofia (Reservatório de Salto Grande - Americana - SP)." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-18042016-112245/.

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O estudo das florações de cianobactérias potencialmente tóxicas é de fundamental importância, principalmente se tratando de um reservatório de grande valor econômico e social, devido a seus usos múltiplos e localização próxima a grandes centros urbanos como é o reservatório de Salto Grande (Americana - SP). Assim, este trabalho visou fornecer subsídios para formulação de prognóstico da ocorrência de cianobactérias e produção de toxinas em ambientes aquáticos com elevado grau de eutrofização. Para isto, a pesquisa foi desenvolvida em três escalas: em macrocosmo (represa), foi determinada a vari

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11

GROPPO, GUILHERME H. "Disponibilidade de Po-210 na utilização do fosfogesso na agricultura." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23178.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2014-12-19T17:47:33Z No. of bitstreams: 0<br>Made available in DSpace on 2014-12-19T17:47:33Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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12

Lopes, Jéssica Costa. "Desempenho de reator de leito estruturado submetido à aeração intermitente, na remoção de nitrogênio e fósforo de esgoto sanitário utilizando glicerol fermentado como fonte de carbono." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-18072017-142829/.

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Este trabalho buscou verificar a viabilidade do uso de fermentado de glicerol como fonte externa de carbono para a remoção biológica de nutrientes em um reator de leito estruturado, submetido à aeração intermitente (LEAI). O LEAI foi alimentado com efluente de reator UASB de bancada, usado no tratamento de esgoto sanitário. O reator LEAI possuía volume total de 12,3L e, devido às hastes cilíndricas verticais de espuma de poliuretano usadas como suporte para a biomassa, o volume útil foi de 8,6 L. Inicialmente, o reator foi operado sob aeração contínua com tempo de detenção hidráulica (TDH) de

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13

Carneiro, Rodrigo Braz. "Utilização de glicerol como fonte de carbono para desnitrificação e remoção biológica de fósforo em reator submetido à aeração intermitente." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-27052015-155302/.

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Esse trabalho buscou avaliar a possibilidade de utilização do glicerol como fonte de carbono para a desnitrificação conjunta à remoção biológica de fósforo de um efluente sintético em um reator de fluxo contínuo submetido à aeração intermitente e com biomassa suspensa. O regime operacional do reator foi dividido em duas fases: a primeira visando somente a remoção de nitrato, testando diferentes relações Carbono/Nitrogênio (C/N) em Tempo de Detenção Hidráulica (TDH) de 4 horas; e a segunda visando a remoção de nitrato e fosfato com períodos de aeração e não aeração de 2 e 4 horas respectivament

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14

Culbertson, Thimothy W. "Effects of typical concentrations of nitrogen and phosphorus in agricultural treatment wetlands on polycultures of (Typha latifolia) L. and (Juncus effusus) L. and a test of the N:P ratio as a predictive tool." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2822.

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Thesis (M.S.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Marine, Estuarine, Environmental Sciences Graduate Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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15

Eldridge, Peter M. "The effect of nitrogen and phosphorus supply ratios and dilution rate on phosphorus uptake and mineralization in continuous flow microcosms." W&M ScholarWorks, 1990. https://scholarworks.wm.edu/etd/1539616640.

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Continuous flow microcosms (50L volume, salinity 18-24 ppt) were used to examine the roles of heterotrophic protozoa and bacteria as phosphorus mineralizers. Nitrogen limitation was regulated by N:P supply ratios (5:1, 16:1) and growth rate was regulated by dilution rate (0.5, 0.25 volumes day&\sp{lcub}-1{rcub}&). Rates of carbon and phosphorus uptake from dissolved inorganic pools were determined using &\sp{14}&C and &\sp{lcub}32{rcub}&P tracer experiments and pre- and post-fractionation incubations. Based on uptake rates and on POP and POC values of the bacteria in the &<&1.0 &\mu&m fraction

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16

White, April Frye. "A Goal Programming Approach to Simultaneously Minimize Whole Farm Ration Cost and Phosphorus Balance." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1593622413223357.

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17

Shatwell, Tom. "Interactive effects of nutrients and physical factors on phytoplankton growth." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/16877.

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Phytoplanktonarten unterscheiden sich in ihren Ansprüchen hinsichtlich Ressourcen wie Nährstoffe, Licht und andere physikalische Faktoren. Wechselwirkungen zwischen Nährstoffen und physikalischen Faktoren beeinflussen daher die Artenzusammensetzung einer Phytoplanktongemeinschaft. In der vorliegenden Arbeit wurde der Einfluss von Temperatur und Photoperiode auf das Phytoplanktonwachstum in Abhängigkeit vom Lichtregime und dem Angebot an Phosphor (P) und Silizium (Si) untersucht. Hierfür wurden Wachstums- und Konkurrenzexperimente unter Laborverhältnissen mit Stephanodiscus minutulus, Nitzschia

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18

Chakwizira, Emmanuel. "Growth and development of 'Pasja' and kale crops grown with two methods and four rates of phosphorus (P) application : a thesis submitted in partial fulfilment of the requirements for the degree of Masters [i.e. Master] of Agricultural Science at Lincoln University /." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/929.

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*‘Pasja’ (Brassica campestris x napus) and kale (Brassica oleracea var. acephala L.) were grown at Lincoln, Canterbury, New Zealand in 2008 with different levels of phosphorus (P) fertiliser. Banded or broadcast P fertiliser was applied at 0, 20, 40 and 60 kg P/ha at establishment. Total dry matter (DM) production, the proportion of the leaf and stem and leaf area development were measured over time and related to the biophysical environment. For ‘Pasja’, final DM increased with P rate from 3730 kg DM/ha to ~4900 kg DM/ha at 60 kg P/ha. For kale the increase was from 8710 kg DM/ha for the cont

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19

Fulton, Laura Michelle. "Nutrient Removal by Algae Grown in CO2-Enriched Wastewater over a Range of Nitrogen-to-Phosphorus Ratios." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/194.

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In conventional wastewater treatment, biological nutrient removal (BNR) depends on bacterial assimilation for phosphorus removal and nitrification+denitrification for nitrogen removal, with the resulting loss of the fixed nitrogen resource. Alternatively, treatment by microalgae allows for assimilative removal of both phosphorus (P) and nitrogen (N) thereby avoiding the oxygen demand of nitrification and preserving fixed N for fertilizer use. Paddle wheel mixed high-rate ponds have much higher algal productivity than typical oxidation ponds, but even high-rate ponds often cannot grow sufficien

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20

Heuck, Christine [Verfasser], and Marie [Akademischer Betreuer] Spohn. "Microbial nitrogen and phosphorus mineralization and microbial biomass stoichiometry as dependent on ratios of carbon, nitrogen and phosphorus in soils of temperate forests / Christine Heuck ; Betreuer: Marie Spohn." Bayreuth : Universität Bayreuth, 2018. http://d-nb.info/1177142074/34.

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21

Crawford, Kathryn A. "The Effects of Nutrient Ratios and Forms on the Growth Of Microcystis aeruginosa and Anabaena flos-aquae." ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/59.

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Cyanobacteria are ancient prokaryotic organisms capable of performing oxygenic photosynthesis. An increase in the temporal and spatial distribution of cyanobacteria blooms worldwide has drawn considerable research attention in recent decades because of the health risks cyanobacteria pose to humans and wildlife through the production of cyanotoxins, interference with recreation, and ecosystem changes. A variety of hypotheses have sought to explain the increasing frequency and severity of cyanobacteria blooms around the world, with the relationship between cyanobacteria abundance and eutr

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22

Corrales, Juliana. "Modeling a Phosphorus Credit Trading Program in the Lake Okeechobee Watershed." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2294.

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Lake Okeechobee is the largest lake in the southeastern United States and is a central component of the hydrology and environment of the Everglades ecosystem in South Florida. The natural state of the lake has been degraded as wetlands and natural habitats in the Lake Okeechobee watershed have been replaced with farms, urban areas, and dairy operations. Excessive phosphorus loadings from these diverse sources have been identified as the leading causes of the lake’s impairment. For more than four decades, many resources have been allocated to regional and local restoration efforts to reduce pho

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23

Голуб, Сергей Николаевич, Валентина Александровна Голуб, Генадий Сергеевич Голуб, S. N. Golub, V. A. Golub та G. S. Golub. "Проблемы эффективного использования радиоактивно загрязненных почв Полесья Волынской области в послеаварийный период Чернобыльской катастрофы". Thesis, Полесский аграрно-экологический институт Национальной академии наук Беларуси, 2012. http://evnuir.vnu.edu.ua/handle/123456789/2527.

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Изучена динамика изменений агрохимических показателей почвы Волынской области в послеаварийный период, проведено обследование сельскохозяйственных угодий с целью уточнения плотности загрязнения 137Сs и рекомендованы мероприятия, направленые на снижение коэффициентов перехода радионуклидов из почвы в растения. The dynamics of changes of indexes of agricultural chemistries is studied ґрунту Volinskoy area in a pislyaavariyniy period, the inspection of agricultural lands is conducted with the purpose of clarification of closeness of contamination of 137Сs and measures are recommended which ar

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Taube, Venja Alexandra. "Untersuchungen zum Phosphor-Haushalt von Mastbullen bei Variation des Rohfasergehaltes in der Ration und Einsatz von Calciumchlorid." Giessen : DVG-Service, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015463509&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Taube, Venja Alexandra [Verfasser]. "Untersuchungen zum Phosphor-Haushalt von Mastbullen bei Variation des Rohfasergehaltes in der Ration und Einsatz von Calciumchlorid / vorgelegt von Venja Alexandra Taube." Gießen : DVG-Service, 2006. http://d-nb.info/994578040/34.

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Rodrigues, Marcos. "Legacy phosphorus in Brazilian agriculture and cover crops contribution to enhance this nutrient bioavailability in tropical Oxisols." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-29062018-091614/.

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Phosphorus (P) one of the essential elements to plants and animals, is a non-renewable resource and accuatlly high demanded in agriculture. The World\'s population growth and future estimatives on food demands raises the question about the sustainability of the current agriculture systems, speccially concerns about the low P use efficiency in agroecosystems. Brazilian agriculture requires high P inputs and many researches has been developed to increase the crops yield and, consequently, food production efficiency. However, this development was achieved at the high costs of mineral fertilisers

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Le, Touze Christophe. "Etude des propriétés associées aux ondes de densité de charge dans les bronzes oxygénés quasi-bidimensionnels (PO2)4(WO3)2m." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10183.

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Nous avons etudie les proprietes associees aux ondes de densite de charge dans les bronzes quasi-bidimensionnels (po#2)#4(wo#3)#2#m (m=4, 5, 6, 7, 10, 11 et 12). Ces composes subissent des transitions de peierls a des temperatures t#p vers un etat d'onde de densite de charge caracterise par une distorsion periodique de reseau couplee a une modulation de la densite electronique. La chaleur specifique a ete mesuree pour les composes 4m entre 1,7k et 300k. Nous avons obtenu des termes lineaires en temperature anormalement eleves et qui augmentent avec m. Les temperatures de debye se situent autou

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Rahman, Ishita. "Direct Biofiltration and Nutrient (Phosphorus) Enhancement for Polymeric Ultrafiltration Membrane Fouling Control." Thesis, 2013. http://hdl.handle.net/10012/8073.

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Membrane filtration is growing in popularity as a viable technology for drinking water treatment to meet high demand and regulatory requirements. While many improvements have been made to the technology in the past decade, fouling continues to be one of the major operational challenges associated with membranes as it increases operating costs and reduces membrane life. Fouling control typically requires some form of pre-treatment. Biofiltration is a ???green??? technique that can minimize chemical usage and waste during water treatment and is a relatively new application as a pre-treatment for

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Johnson, Ntinya. "Determination of Optimal True Digestible Calcium to True Digestible Phosphorus Ratio in Growing Pigs." 2013. http://hdl.handle.net/10214/5928.

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Three studies were conducted. In the first study, 12 Yorkshire barrows (initial BW of 23.2 ± 2.0 kg) were allotted to 2 dietary treatments with 6 replications per treatment using a completely randomized design to determine apparent Ca and P digestibility (AD), true digestibility (TD) and endogenous output (EO) in a corn/SBM-based diet. All pigs were placed in individual feeder pens that allowed for easy collection of individual feces. The AD of Ca and P were 28.4% and 23.9%, respectively. Their TD of 42% and 40% for Ca and P respectively were significantly (P < 0.05) higher than the correspond

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You, Sheng-Jie, and 游勝傑. "The Denitrification and Phosphorus Removal Characteristic of Sludge which was Cultured by Different Phosphorus and COD Ratio and Identification Microbial Community by Utilizing Molecular Biotechnology." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/94993643909636343083.

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碩士<br>國立中央大學<br>環境工程學系<br>86<br>The biological nutrient removal (BNR) process is the main process to treat municipal wastewater in the recent years. This research examines the denitrification/phosphorus-removal characteristic under different influent P/C ratio by controlling the COD concentration at 300 mg/l and changing the total phosphorus concentration (2.5, 3.5, 5, 10, 15, 25 mg/l) using TNCU-I process. This research also distinguishes the difference of the microorganism community of di

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Sattouf, Mamdoh. "Identifying the origin of rock phosphates and phosphorus fertilisers using isotope ratio techniques and heavy metal patterns /." 2007. http://www.gbv.de/dms/bs/toc/543855309.pdf.

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Lin, Han-Shan, and 林含珊. "Association between Dietary Calcium, Phosphorus, Magnesium Intake and Dietary Ca/P Ratio and Caries Status among Elementary School Children." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/66711045695911347320.

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碩士<br>高雄醫學大學<br>口腔衛生科學研究所<br>99<br>Background: Nutritional factors are generally associated with several systemic diseases, gastrointestinal disorders, most cancers, as well as oral diseases. Dental caries has been the most common chronic oral disease in school children. Some epidemiological studies have revealed that subjects with relatively high calcium and phosphate in their plaque experience a correspondingly lower presence of caries. An investigation indicated that dietary calcium-phosphorus (Ca/P) ratio was strongly associated with caries development in human teeth. The purpose of this r

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Au, Li-Yen, and 敖立燕. "Dietary phosphorus to protein ratio analysis from the databases of food composition in Taiwan and comparison with USDA Food Composition Databases." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/juk3n8.

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碩士<br>臺北醫學大學<br>保健營養學研究所<br>105<br>Kidney Disease Outcomes Quality Initiative (KDOQI) guidelines recommend the use of phosphorus to protein ratio for proper dietary protein intake and restriction of dietary phosphorus, but there’s lack of intact food phosphorus to protein ratio and phosphorus data in Taiwan. The objective of this study was to provide phosphorus to protein ratio and phosphorus content per serving of Taiwanese foods to clinical workers for further application. Phosphorus to protein ratio and phosphorus content per serving from the newest databases of food composition in Taiwan w

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Lekhi, Priya Anka. "Cadmium in the coastal marine environment : pathways for cadmium in oysters and using the cadmium : phosphorus ratio as an indicator of biogeochemical processes." Thesis, 2006. http://hdl.handle.net/2429/18307.

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Pacific oysters collected on the coasts of British Columbia (BC) have shown Cd levels of around 2 μgg⁻¹ and higher (wet weight) which has resulted in the loss of some international markets. During 2004-2005, two farm sites on Vancouver Island were monitored for various parameters including the Cd concentration in oysters, dissolved and particulate Cd in seawater, temperature and salinity. One part of this study investigated the source and transfer of Cd to oysters by focusing on the role of dissolved and particulate Cd in seawater. Results show that dissolved Cd is the main source of Cd to oys

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Chia-Chun, Liu, and 劉珈均. "The study of mole ratio variation of nitrogen to phosphorus among different atmospheric particle-size in the coastal area of the northern Taiwan." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/68732522236968012125.

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碩士<br>國立臺灣海洋大學<br>海洋環境資訊學系<br>101<br>This study analyzed 98 aerosol samples collected from January 2008 to April 2010 at a coastal site at Keelung city, Northern Taiwan, for water-soluble nitrogen species (WSIN) and dissolved inorganic phosphorus (DIP). The atmospheric particles were fractionated into seven stages ( <0.4μm、0.4~0.67μm、0.67~1.28μm、1.28~1.97μm、1.97~3.9μm、3.9~9.3μm、>9.3μm). In this study, we defined the particle size greater and smaller than 1.97μm as coarse and fine mode, respectively. In addition, 3-day back trajectories of air masses arriving daily at the sampling site were cal

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Desrosiers, Mélissa. "Homéostasie phosphocalcique et vitamine D : effets sur le cartilage de croissance par la mesure des paramètres physiques, biochimiques et géniques liés à la croissance osseuse." Thèse, 2007. http://hdl.handle.net/1866/8151.

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Ming-Shan, Shih, and 施銘山. "The study of derived source and mole ratio of water soluble inorganic nitrogen and inorganic phosphorus in atmospheric suspended particles over the northern Taiwan." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51156481528236408799.

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碩士<br>國立臺灣海洋大學<br>海洋環境資訊學系<br>101<br>In this study, water-soluble nitrogen and phosphorus species atmospheric aerosol samples were measured at a coastal site on the southern East China Sea at Keelung city, from September 2010 to May 2012. In addition, 3-d back trajectories of air masses arriving daily at the sampling site were calculated to determine the potential aerosol source regions. During the study period, a continental source was dominant in the spring, fall and winter, a local source and an oceanic source in the summer. The measured atmospheric concentrations of water-soluble nitro

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Veselý, Adam. "Fytodiverzita různě starých úhorů ve vztahu ke změnám využívání zemědělské půdy v okolí českých vesnic v rumunském Banátu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-345031.

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The main aim of this thesis was to identify the main factors influencing development and diversity of vegetation on old fields around village Svatá Helena in Romania. I evaluated the influence of age of an old field, its management (mowing, pasture, burning and fallowing), soil chemical properties, topography and surrounding vegetation. Using phytosociological relevés I collected data about species composition and coverage of species of the old field vegetation. With the assistance of local inhabitants I found out the age of the old fields and the type of applied management. I performed chemic

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Lan, Tang-Shiu, and 藍當修. "Effects of phosphor material ratio on organic red light emitting diodes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93246971631752765339.

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碩士<br>聖約翰科技大學<br>自動化及機電整合研究所<br>99<br>In this study the surface reforms were preceded by high temperature annealing and plasma treatments. The plasma treatment times were 5 and 10 minutes respectively. The annealing temperature was fixed at 200℃ and lasted for 10 minutes. The plasma power was fixed at 18 Watts to clean the surface of Indium Tin Oxide (ITO) for reforming process. The modified surfaces were examined by X-ray diffraction, PL Spectrometer, 3D Profiler, Atomic Force Microscopic (AFM) and IV-CV electrical property measured equipments. The thin film of red Phosphorescence Organic Lig

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Van, Aswegen Izak Schalk. "'n Ondersoek van die opname en vrystelling van fosforverbindings deur Potamogeton pectinatus L. met behulp van die radio-isotope 32p en 33p." Thesis, 2014. http://hdl.handle.net/10210/10755.

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Peng, Chih-Ting, and 彭稚庭. "Effect of Silicone/Solvent Ratio on the Optical Properties of the Phosphor Film." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/60205852257103153342.

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碩士<br>中華大學<br>機械工程學系碩士班<br>102<br>The traditional white LED package utilizes dispensing process with optical gel mixing glue with phosphor leads to precipitation and sedimentation phenomena due to unable to control the layer thickness of phosphor, resulting in uneven color temperature dispersion, light scattering and yellow circle halo. LED packaging process allowing wafer direct contacts with the fluorescent powder, may lead to excessive heat and reduce luminous efficiency, thus increasing the production cost. In this study, silicone A and B mixed with solvent in different ratio and fol

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Huang, Tzu-Hsuan, and 黃子軒. "Effect of Nitrogen Form Ratio, Phosphorous and Night Break on Growth and Flowering of Spathoglottis plicata." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58071608032483380675.

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碩士<br>國立中興大學<br>園藝學系所<br>98<br>Spathoglottis plicata and Spa. plicata ‘RS01’ were used in this study to research the effect of different nitrogen form ratios, different concentrations of phosphorous, and different night break treatments on growth and regulating the flowering of Spathoglottis, and increasing inflorescence emergence rate. Spa. plicata and Spa. plicata ‘RS01’ were fertilized with two different nitrogen forms in two rates (NO3--N : NH4+-N=10:1 and 6:1) on primary pseudobulb stage, resulted 100% inflorescence emergence rate, however, 6:1 nitrogen rate had the highest inflorescences

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Cheng, Po-Jen, and 鄭博仁. "A Study of Artificial Neural Network on the Phosphor Ratio Prediction of LED Components." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/77v6mh.

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碩士<br>中原大學<br>工業工程研究所<br>102<br>The production flow of LED can generally be separated to upstream epitaxy, midstream chip, and downstream packaging. In order to produce the right CIE coordinates for the needs of customers, LED packaging manufacturers need to test different phosphor to find out the best ratio of during the dispensing process. This study collects data from dispensing production process. A statistical analysis is applied to distinguish the important factors that would influence the ratio of phosphor. Finally, the BPN is deployed to construct the PRP system for LED components. Thi

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Cortez, Susana. "Landfill leachate treatment in rotating biological contactors." Doctoral thesis, 2010. http://hdl.handle.net/1822/11191.

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Tese de doutoramento em Engenharia Química e Biológica<br>Sanitary landfilling is the most used and accepted method to eliminate municipal solid waste worldwide due to its economic advantages. The generation of leachate is an inevitable consequence of this practice. Landfill leachate is a high-strength wastewater with great chemical complexity and diversity. In order to avoid discharges to the environment causing negative impacts to the biota or public health, it must be properly collected and treated before being discharged. In Portugal, in many leachate treatment plants, the leachate after

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Lin, Nan-Hung, and 林南宏. "Study on the effects of phosphate concentration, pH, molar ratios and pre-treatment on phosphorus recovery from biosolids by a fluidized-bed crystallizer (FBC)." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/e8akng.

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博士<br>國立中興大學<br>環境工程學系所<br>106<br>Phosphorus is a life element and also a nonrenewable-limited resource. Sewage biosolids contain rich phosphorus, how to reuse it efficiently will be an important task in the future. This study aims at phosphorus recovery from the synthetic wastewater and dewatering filtrate of Futien Water Resources Recycling Center in Taichung City by fluidized-bed crystallizers (FBC). The results of the crystallization tests showed that phosphate concentration was the greatest among the parameters on removal efficiency of phosphate (RP) and crystal efficiency of phosphate (C

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Jen, Tzu-Hao, and 任慈浩. "Investigation of Excitation Energy in Polymer Light-Emitting Diode: Measurement of Singlet to Triplet Ratio in Polymer Light-Emitting Diode and Effective Reduction of Quenching of Phosphor Triplet Exciton in Electrophosphorescent Polymer Light-Emitting Di." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/57903381361391647709.

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博士<br>國立清華大學<br>化學工程學系<br>97<br>Electroluminescence (EL) from organic molecules and conjugated polymers has attracted wide interest because of the large potential for application in display fabrication. In organic light-emitting diode (OLED),holes and electrons injected from the anode and cathode can recombine to yield singlet fraction (χS) of 25% according to quantum statistics and some experiments. However, for polymer light-emitting diodes (PLED), this fraction still remains under debate. Therefore, it is extremely important for us to clarify χS in the PLED and investigate its relation with

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Lamberts, Jill S. "Nutrient release and cycling in the soils of a continental lodgepole pine (Pinus contorta Doug.) ecosystem, Bootleg Mountain, B.C." Thesis, 2005. http://hdl.handle.net/1828/46.

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Nutrient dynamics in a lodgepole pine forest at Bootleg Mountain, B.C., were investigated through the sampling of soil, snow and groundwater in six one-ha blocks. Nitrogen (NO3-, NH4+, TIN, TDN, TN), phosphorus (PO43-, TDP, TP), and DOC were analyzed in addition to N mineralization and nitrification. Position and dispersion statistics were computed for each variable and correlations (Pearson and Spearman) were computed for each pair of variables. The overall heterogeneities of soil, snow, and groundwater were generally lower between 1-ha blocks than between plots. Productivity in the soil

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