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Dissertations / Theses on the topic 'Ulva'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Wilkinson, Sarah. "An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions." Bachelor's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/25786.

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In the light of findings that abalone achieve higher growth rates when fed on high protein diets, this study attempts to increase the protein content of two macroalgae under culture conditions. Ulva lactuca and U rigida were grown in saturating NH₄⁺ - N (1 mM) and PO₄³⁻P (70 μM ) concentrations. Of the two, protein levels of U. lactuca showed the greatest increase over time. Natural populations had a content of 3.7 % of dry weight. This increased significantly (p <0.05) to a maximum value of 4.5 % after 8 days growth in nutrient enriched conditions. The protein content of U. rigida increase
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2

Sampaio, Alexandre Holanda. "Lectins from Ulva and Ptilota species." Thesis, University of Portsmouth, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310389.

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3

Amosu, Albert Oluwatobi. "Using Ulva (Chlorophyta) for the production of biomethane and mitigation against coastal acidification." University of the Western Cape, 2016. http://hdl.handle.net/11394/5324.

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Philosophiae Doctor - PhD<br>In South Africa the green macroalga Ulva armoricana is the main species of macroalgae cultured. The species is currently the largest aquaculture (2884.61 tonnes) product by weight with a corresponding capacity for biogas (CH₄) production. We have shown that biotransformation of U. armoricana to Liquefied Petroleum Gas (LPG) is viable and economically feasible as a clean fuel. pH toxicity tests showed that U. armoricana can be used as a health index, under potentially increased CO₂ concentrations that can occur in IMTA carbon sequestration. We have shown sporulation
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4

Dang, Thom Thi, Mishima Yasufumi, and Kim Dinh Dang. "Potential of Ulva sp. in biofiltration and bioenergy production." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99448.

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In order to evaluate the effect of seaweeds in bio-filtration for removing nitrogen from marine aquaculture and in bioenergy production, Ulva sp. was used in this study. Experiments were triplicated and run in 3-day incubation at salinities with 30 psu, 10 psu and 5 psu in different initial ammonium nitrogen concentrations from 100 μM to 10,000 μM, equivalently to marine aquaculture conditions. The highest concentrations of ammonium removed were about 690 μmol (12.42 mg) NH4+ at 30 psu, 410 μmol (7.38 mg) NH4+ at 10 psu and 350 μmol NH4+(6.3 mg NH4+) at 5 psu in three days of incubation, while
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5

Alencar, Daniel Barroso de. "ProspecÃÃo quÃmica da macroalga marinha verde Ulva fasciata Delile." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6565.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ<br>As macroalgas marinhas sÃo consideradas fontes promissoras de compostos bioativos para estudos fitoquÃmicos. Tais compostos possuem diferentes propriedades biolÃgicas, funcionando como antibacterianos, antifÃngicos, antivirais, anti-inflamatÃrios, anti-helmÃnticos, antileishmaniose, antimalÃria, antioxidantes, antitumorais cuja utilizaÃÃo como fÃrmacos tem despertado o interesse de muitos pesquisadores. O objetivo deste trabalho foi realizar a investigaÃÃo fitoquÃmica do extrato
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6

Alencar, Daniel Barroso de. "Prospecção química da macroalga marinha verde Ulva fasciata Delile." reponame:Repositório Institucional da UFC, 2010. http://www.repositorio.ufc.br/handle/riufc/1126.

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ALENCAR, Daniel Barroso de. Prospecção química da macroalga marinha verde Ulva fasciata Delile. 2010. 68f. Dissertação (Mestrado em Engenharia de Pesca)-Centro de Ciências Agrária,Universidade Federal do Ceará, Fortaleza, 2010.<br>Submitted by Maria Naires Souza (marianaires@ufc.br) on 2011-11-11T19:22:22Z No. of bitstreams: 1 2010-dis-dbalencar.pdf: 1843830 bytes, checksum: d2be4a7f57929369252c5c735b5c6d2c (MD5)<br>Approved for entry into archive by Aline Nascimento(vieiraaline@yahoo.com.br) on 2011-11-16T15:00:44Z (GMT) No. of bitstreams: 1 2010-dis-dbalencar.pdf: 1843830 bytes, checksum: d2
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7

Murphy, Gerry. "Ecological effects of Ulva lactuca L. in Avon-Heathcote Estuary." Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/1337.

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Macroalgal blooms are increasing world-wide and have negative effects on benthic invertebrates and sediments. These include loss of species diversity and development of hostile sediment environments. This thesis considers ecological effects of Ulva lactuca L., and its mechanical removal on benthic invertebrates and sediments in Avon-Heathcote Estuary, New Zealand. Benthic communities comprised 34 species from 12 groups recorded from seven sites during seasonal general surveys. Dominant groups at each site were Gastropoda and Bivalvia. The most abundant species were Austrovenus stutchburyi, Mic
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8

Briones, Parra Gonzalo Alfonso. "Producción de etanol a partir de la macroalga Ulva rígida." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/111335.

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Ingeniero Civil en Biotecnología<br>Hoy en día el tema de abastecimiento energético es cada vez más importante. En muchos países la matriz energética se basa en la explotación del recurso fósil, principalmente petróleo, el cual es un recurso limitado y que ha tenido una tendencia general al alza de precios. A lo anterior se añade las actuales normativas de emisiones que se están aplicando, las cuales prevén un futuro donde los combustibles fósiles se verán más limitados en su producción y aplicación. Los biocombustibles por tanto han sido una importante alternativa que se ha desarrollado por a
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9

Thwala, Sazi Selby. "Investigation of the natural products composition from the seaweed ulva capensis." University of Western Cape, 2019. http://hdl.handle.net/11394/7888.

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>Magister Scientiae - MSc<br>In modern society, diversity of marine macroalgae has become an inspiration for pharmaceutical companies and researchers because of their numerous health benefits, and a great deal of interest has developed towards the isolation of bioactive compounds to identify novel marine natural products that could eventually be developed into therapeutics or pharmaceutical products. Furthermore, marine macroalgae are valuable source of structurally diverse metabolites with scientifically proven reports. The search continues as there are many natural bioactive compounds that
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10

Shuuluka, Diina. "Ecophysiological studies of three South African Ulva species from integrated seaweed." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10903.

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Includes bibliographical references (leaves 210-273).<br>In South Africa, Ulva cultivation is of paramount importance to the marine aquaculture industry. Three local Ulva species (Ulva lactuca Linnaeus, Ulva rigida C. Agardh and Ulva capensis Areschoug) were selected for this research. The first two are currently cultivated on abalone farms for abalone feed and for use as bio-filters, and Ulva capensis was included because it is morphologically and biogeographically distinct from Ulva rigida in nature, despite the inability of molecular methods to separate them. Ulva rigida was collected at I
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11

Petersson, Sarah, and Regnström Ebba Larsson. "Planering av en landbaserad odling av Ulva intestinalis på norra Öland." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280475.

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Ulva intestinalis är en fotoautotrof grönalg som är utspridd i stora delar av världen och har ett flertal användningsområden, däribland som matråvara samt som biobränsle. Matindustrin står idag för en fjärdedel av världens utsläpp av växthusgaser. För att FN:s globala mål ska uppnås innan år 2030 måste dessa utsläpp minska. Ett sätt att bidra till att målen nås är att ändra vilka livsmedel som produceras, där alger kan vara en del av den framtida mera hållbara maten. Syftet Med detta arbete var att undersöka möjligheterna för en hållbar algodling för matkonsumtion.Målet var att genom en litter
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12

Consuegra, Valenzuela Verónica Angélica. "Extracción de antioxidantes polifenólicos desde macroalgas macrosystis pyrifera y ulva rígida." Tesis, Universidad de Chile, 2014. http://repositorio.uchile.cl/handle/2250/132021.

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Memoria para optar al título de Ingeniera Civil en Biotecnología<br>Las algas se utilizan desde tiempos inmemoriales para consumo humano y extracción de subproductos. Entre los más conocidos estas los ficocoloidales como el alginato, agar y carragenano, de gran valor en la industria alimenticia. Actualmente, existe interés por la utilización de biomasa algal en la producción de biocombustibles, lo cual abre una potencial explotación de otros subproductos de algas, creando procesos sustentables y amigables medioambientalmente. Dadas las condiciones naturales extremas en que se desarrollan estos
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13

Gao, Guang. "Developing systems for the commercial culture of Ulva species in the UK." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3313.

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The green seaweed, Ulva, is highly valued in terms of animal feed, food and biofuel, as well in the delivery of crucial remediation services including wastewater treatment and CO2 removal. Accordingly, Ulva cultivation has gained significant research interest worldwide. Notwithstanding these research efforts, Ulva cultivation is still in its infancy and knowledge to underpin such developments remains limited. A common challenge in Ulva cultivation is the fluctuating productivity with time due to vegetative fragmentation and/or periodic reproduction. In this study, three methods were employed t
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14

Du, Plessis Darren Scott. "Chemosensory properties of different Ulva extracts and their effects on Tripneustes gratilla." Bachelor's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/12766.

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Includes bibliographical references.<br>Identifying the chemical compounds that attract urchins to seaweeds will increase sea urchin aquaculture efficiency as these compounds can be utilized in the production of artificial feeds enhancing their attractiveness and palatability. This study investigated the chemosensory preferences of the tropical sea urchin Tripneustes gratilla for four crude extracts of Ulva as well as Fresh Ulva and an artificial feed. The four crude extracts of Ulva (Methanolic, Ethanolic, Chloroform and Chloroform-Methanol extracts) were tested by pair-wise chemosensory tria
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15

Joska, M. A. P. "Taxonomy of Ulva species (Chlorophyta) in the South Western Cape, South Africa." Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/21712.

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Bibliography: pages 88-95.<br>Six species of Ulva, U. atroviridis Levring, U. capensis Areschoug, U. fasciata Delile, U. lactuca L., U. rigida C.Agardh and U. uncialis Kutzing, have been reported to occur in the south western Cape Province. As a result of herbarium, field and culture studies it was found that five of these species do occur, but U. uncialis is a synonym of U. riqida (Agardh, 1883). Furthermore, U. atroviridis has correctly been reassigned to the genus Enteromorpha (Wynne, 1986). U. rhacodes (Holmes) Papenfuss, which has hitherto only been reported from the eastern Cape Provinc
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16

de, Jager Kristin. "Microorganisms associated with ulva grown in abalone effluent water: implications for biosecurity." Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33618.

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Macroalgae such as Ulva are living hosts that are known to perform essential roles in marine ecosystems, and are extensively utilised for several aquaculture operations, including in the integrated production of high value goods such as abalone. Intensive aquaculture operations along the coastline release effluent water into the surrounding coastal waters, which has adverse impact on the environment. As a means to bioremediate abalone effluent, several commercial abalone farms in South Africa use Ulva as a biofilter, after which the Ulva may serve as a feed source for the abalone. Advancements
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Araujo, Clarissa Lourenço de. "Estudo experimental da acumulação de metais por Ulva SP e Ruppia Maritima." Niterói, 2016. https://app.uff.br/riuff/handle/1/1662.

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Submitted by Biblioteca de Pós-Graduação em Geoquímica BGQ (bgq@ndc.uff.br) on 2016-04-28T18:18:17Z No. of bitstreams: 1 Tese Clarissa Lourenço de Araujo.pdf: 7002934 bytes, checksum: 52d368f8ad6a751f994f7846928d0854 (MD5)<br>Made available in DSpace on 2016-04-28T18:18:17Z (GMT). No. of bitstreams: 1 Tese Clarissa Lourenço de Araujo.pdf: 7002934 bytes, checksum: 52d368f8ad6a751f994f7846928d0854 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Universidade Federal Fluminense. Instituto de Química. Programa de Pós-Graduação em Geociências-Geoquímica. Niterói, RJ<br>Est
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18

Santos, Janaina Pires. "Perfil antioxidante e bioatividade de três espécies de macroalgas da Praia do Morro de Pernambuco no litoral Sul da Bahia, Brasil." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-03012017-142742/.

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As macroalgas desempenham importante papel no ambiente marinho como produtores primários. Elas ocupam diversas zonas do costão rochoso, entre elas, o mediolitoral que é a mais estudada devido às rápidas mudanças nos fatores ambientais (temperatura, dessecação, irradiância, salinidade, entre outros) direcionados pela dinâmica das marés. Esse dinamismo, fez com que os organismos desenvolvessem defesas que garantissem a sua sobrevivência nesses ambientes. E essas defesas, na maioria das vezes química, também possuem utilidade e aplicações biotecnológicas, pois as algas são fonte de novas substânc
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Costa, Vanessa Macedo Freire da. "Utiliza??o da macroalga Ulva lactuca linnaeus na redu??o de nutrientes (NH4+,NO3- e PO4-2) provenientes da carcinicultura." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12503.

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Made available in DSpace on 2014-12-17T14:02:02Z (GMT). No. of bitstreams: 1 VanessaMFC.pdf: 1244215 bytes, checksum: 2d84570105aa3f980f60bc5ac24ab268 (MD5) Previous issue date: 2006-09-11<br>Dentre as macroalgas capazes de absorver altas concentra??es de N e P dissolvidos na ?gua, destaca-se a Chlorophyta Ulva lactuca, bastante adapt?vel e resistente ?s adversidades ambientais, como grandes varia??es de temperatura, salinidade, mat?ria org?nica e metais pesados. Trata-se tamb?m de uma esp?cie bastante comum nas ?reas intertidais do litoral norte-riograndense. Devido a suas caracter?sticas e
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20

Salim, Douaa. "Formulations écocompatibles d'extraits de l'algue verte Ulva Lactuca pour la préservation des agrumes après récolte." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0128.

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La culture des agrumes est l'une des plus répandues, dans les pays méditerranéens. Cependant, ces agrumes sont exposés à de nombreuses maladies post-récolte, généralement causées par le pathogène « Penicillium digitatum ». Plusieurs fongicides chimiques utilisés pendant des décennies, se sont révélés nocifs pour la santé et l'environnement. Le contexte sociétal et règlementaire évoluant, de nouvelles stratégies sont envisagées pour tendre vers des solutions plus sûres. C'est pourquoi, les travaux visent à développer un biopesticide utilisant les molécules naturelles issues d'une algue verte po
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Tujula, Niina Amanda Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Analysis of the epiphytic bacterial community associated with the green alga Ulva australis." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/25197.

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Epiphytic bacterial communities on the surfaces of marine algae are poorly characterised. Most information available on marine bacterial epiphytes is derived from culture-based studies. With the rapid development of molecular community analysis technologies, it is now possible to obtain a more comprehensive picture of marine microbial populations on living surfaces. The intertidal macroalga Ulva australis, belongs to the cosmopolitan group of green marine algae (Ulvales) known to require the presence of bacteria for normal growth and has been suggested to employ specific bacteria for the defen
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Serpa, Dalila do Rosário Encarnação. "Macroalgal (Enteromorpha spp. and Ulva spp.) primary productivity in the Ria Formosa Lagoon." Master's thesis, Faculdade de Ciências e Tecnologia, 2005. http://hdl.handle.net/10362/12085.

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23

Etwarysing, Lekraj. "Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/22030.

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A detailed literature review of relevant Ulva biology and chemical composition is included. Marine algae are known to produce a wide range of volatile organic compounds that are primarily used in chemical communications. These compounds are released in seawater and act as either pheromones or allelochemicals. Aldehydes have been reported to be the main group of volatile compounds in green algae Ulva. Cultivation of Ulva as feed on abalone farms in South Africa has been a success but there has been little research on the chemistry of South African Ulva. This study aims to investigate the potent
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Teixeira, Ana Rute Soares. "Remoção simultânea de contaminantes inorgânicos em águas salinas pela macroalga viva Ulva lactuca." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21226.

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Mestrado em Química<br>Este trabalho pretende contribuir para o desenvolvimento de metodologias alternativas para o tratamento de águas contaminadas. Para isso, investigou-se a capacidade de biossorção/biaccumulação da macroalga viva, Ulva lactuca, em águas salina e salobra contendo uma mistura de contaminantes inorgânicos: As, Cd, Pb, Cu, Cr, Hg, Mn e Ni. Os resultados obtidos evidenciaram que esta macroalga tem uma elevada capacidade de biorremoção, e que variações de salinidade (15-35) não afetam a eficiência do processo. As maiores reduções nos níveis de contaminantes em solução foram obti
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Al-Alam, Joséphine. "Polluants organiques : analyse, application au « biomonitoring » environnemental et introduction des biopesticides (algues marines) comme alternative." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF019.

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Dans un contexte où les inquiétudes environnementales dues à la pollution sont grandissantes à l’échelle globale, la surveillance de la pollution environnementale constitue un enjeu majeur de recherche afin de préserver au mieux un environnement sain et durable. En effet, la surveillance responsable et continue de l’environnement accompagnée par le développement d’alternatives de lutte « verte » contre les nuisibles, pourrait certainement ralentir voir inhiber la propagation de polluants néfastes pour l’ensemble de la biosphère. Dans ce contexte, les objectifs principaux de cette thèse visent
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Twigg, Matthew. "The signal based relationship between the green seaweed Ulva and its indigenous bacterial community." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13011/.

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This project has focused on the relationship between the green seaweed Ulva, commonly found in the intertidal zone of the UK coastline and its cognate bacterial community. It has previously been reported that motile Ulva zoospores are attracted to N-Acylhomoserine lactones (AHLs), signalling molecules utilised by Gram-negative bacteria in a density dependent form of cellular communication termed quorum sensing (QS) and produced by several biofilm dwelling species of marine bacteria. The species represented in the bacterial community associated with Ulva spp. were identified by generating a 16S
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Fontoura, Mariane Pallaoro da. "Avaliação da macroalga Ulva lactuca como co-alimento para o camarão branco do Pacífico." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/133217.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-Graduação em Aqüicultura, Florianópolis, 2015.<br>Made available in DSpace on 2015-06-02T04:07:55Z (GMT). No. of bitstreams: 1 333972.pdf: 547655 bytes, checksum: 0e564adaa0c8f10feee9fd4bf6ef3fb0 (MD5) Previous issue date: 2015<br>O objetivo deste estudo foi avaliar o desempenho do camarão Litopenaeus vannamei quando co-alimentado com macroalga Ulva lactuca em diferentes níveis de substituição (25, 50, 75, 100%) de ração comercial. O experimento foi conduzido durante 28 dias, em caix
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Paulert, Roberta. "Atividade antimicrobiana e controle da antracnose do feijoeiro comum (Phaseolus vulgaris L.) utilizando polissacarídeo e extratos de macroalga marinha Ulva fasciata." Florianópolis, SC, 2005. http://repositorio.ufsc.br/handle/123456789/101868.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina. Programa de Pós-Graduação em Biotecnologia.<br>Made available in DSpace on 2013-07-15T23:25:42Z (GMT). No. of bitstreams: 1 224306.pdf: 1144206 bytes, checksum: 3851e6455c9e7fcbff5c43c79ee99f3c (MD5)<br>Compostos presentes em algas marinhas podem desempenhar importantes funções biológicas, entre elas: atividade antimicrobiana direta, influenciando as interações entre planta-patógeno ou ativando mecanismos de defesa das plantas tratadas. O polissacarídeo ulvana, os extratos solúvel e insolúvel em metanol, o extrato etanólico obtid
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De, Bruin Franklin Quelain. "Carbon-carbon coupling reactions catalysed by palladium nanoparticles supported on the green alga Ulva armoricana." University of Western Cape, 2018. http://hdl.handle.net/11394/6076.

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Magister Scientiae - MSc (Chemistry)<br>The synthesis of nanomaterials, especially metallic nanoparticles, has attracted an enormous amount of interest over the past decade. They exhibit unique properties that allow the multiple applications in a variety of fields in science and technology. Their applications are limited by the efficiency and control of their synthesis to produce nanoparticles of certain size and shape. With ever mounting concern for the environment, a great amount of research has recently been extended to synthetic procedures that are carried out with limited or no toxicity t
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Hodder, Janet. "Production biology of an estuarine population of the green algae, Ulva spp. in Coos Bay, Oregon." Thesis, University of Oregon, 1986. http://hdl.handle.net/1794/9425.

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x, 106 leaves : ill., maps ; 29 cm Notes Typescript Thesis (Ph. D.)--University of Oregon, 1986 Includes vita and abstract Bibliography: leaves 98-106 Another copy on microfilm is located in Archives
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Zehlila, Amel. "Caractérisation structurale et fonctionnelle des métabolites de l'algue verte Ulva Rigida au moyen d'une approche protéomique." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMR101/document.

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Les molécules naturelles de différentes origines et essentiellement celles issues des algues marines conçoivent une panoplie de principes bioactifs naturels à fort potentiel thérapeutique. Actuellement, plusieurs recherches sont consacrées à l’isolement de nouveaux composés bioactifs à partir des ressources marines qui renferment des effets bénéfiques prometteurs pour la santé. Parmi les ressources marines, les composés bioactifs présents dans de nombreuses espèces d’algues ont des propriétés nutritionnelles et pharmaceutiques particulièrement intéressantes. Cette thèse s’intéresse aux effets
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Hone, Patrick William. "The interaction between water movement, diffusion boundary layers, phosphate uptake and phosphate limited growth of Ulva australis /." Title page, contents and abstract only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phh7722.pdf.

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Hana, Kucera. "Species identification and discovery in common marine macroalgae: Fucus, Porphyra and Ulva using a DNA barcoding approach." Thesis, University of New Brunswick, 2010. http://hdl.handle.net/1882/1090.

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The oceans represent a wealth of biological diversity where many species remain to be discovered and described. Among seaweeds, a paucity of morphological features by which to differentiate species means that many genera harbour overlooked or cryptic species. Fucus, Porphyra and Ulva are three common genera of marine intertidal algae and all include species that are particularly difficult to distinguish morphologically. DNA barcoding has been championed as a revolutionary tool for species identification and discovery and applying this tool to algae was a logical step due to the difficulty of m
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Robertson-Andersson, Deborah. "Biological and economical feasibility studies of using seaweeds Ulva lactuca (Chlorophyta) in recirculation systems in abalone farming." Doctoral thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/6174.

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Includes bibliographical references (p. 282-311).<br>The aim of this study was to investigate whether a land-based recirculating seaweed-abalone integrated aquaculture system using Ulva lactuca was feasible as well as to test the differences between a commercial gravel bed recirculation system to an existing flow through system. These studies were carried out at two abalone farms: Danger Point (I & J) (140 km east of Cape Town) and at Jacobs Bay (JSP) (120 km north of Cape Town. South Africa). In both studies no significant difference in terms of water quality, abalone growth rates and abalone
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Huang, Xiao Hang. "Etude du trafic membranaire chez les algues marines : les vesicules mantelees de laminaria digitata et ulva lactuca." Paris 5, 1988. http://www.theses.fr/1988PA05S006.

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Nous avons, pour la premiere fois, isole et caracterise les vesicules mantelees a partir d'algues marines: laminaria digitata et ulva lactuca representantes des algues brunes et des algues vertes respectivement. Les fractions enrichies en vesicules mantelees ont ete preparees par gradient discontinu de saccharose. Les polypeptides de 170-175 kda correspondent aux chaines lourdes de la clathrine de buf et un des polypeptides de 70 kda est semblable au composant de la clathrine de carotte. Tous ces polypeptides montrent une reponse positive a l'anticorps anticlathrine de buf obtenu chez la chevr
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Freitas, Mateus Brusco de. "Mecanismos de resistência e eficiência de formulações de ulvana no controle da antracnose (Colletotrichum lindemuthianum) do feijoeiro (Phaseolus vulgaris L.)." reponame:Repositório Institucional da UFSC, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/93580.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-graduação em Recursos Genéticos Vegetais, Florianópolis, 2010<br>Made available in DSpace on 2012-10-25T00:28:43Z (GMT). No. of bitstreams: 1 274975.pdf: 809433 bytes, checksum: b63aa5f59469f013c937206b22f4bf42 (MD5)<br>O presente trabalho teve por objetivo avaliar os mecanismos de defesa bioquímicos e histológicos envolvidos na resistência inata do feijoeiro à antracnose, compará-los com aqueles induzidos pela aplicação foliar de ulvana e avaliar o efeito de inertes na armazenabilidad
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Mukhoro, Ofhani Christopher. "Green Synthesis and characterization of gold Nanoparticles using Green Alga Ulva Lactuca and evaluation of their Catalytric Role." University of the Western Cape, 2016. http://hdl.handle.net/11394/6078.

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Magister Scientiae - MSc (Biotechnology)<br>Nanoparticles synthesized using typical chemical procedures have associated environmental risks because of the use of hazardous chemicals. With the ever-increasing potential application for nanomaterials, there is a growing need to develop new synthetic procedures for nanomaterials which are non-toxic and eco-friendly. This study presents, as a first step, the screening of the aqueous extracts of several seaweeds in order to assess their ability to produce gold nanoparticles (AuNPs). Eleven aqueous extracts were screened for the synthesis of AuNPs an
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Kandjengo, Lineekela. "The effects of temperature and light on three South African Ulva species,and their potential in integrated aquaculture." Thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/26639.

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Kandjengo, Lineekela. "The molecular systematics of Ulva Linnaeus and Enteromorpha Link (Ulvales, Chlorophyta) from the South Western Cape, South Africa." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/6108.

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Bibliography : leaves 64-79.<br>Both Ulva and Enteromorpha are very common, ubiquitous, and environmentally important genera of green seaweeds. The evolutionary history of Ulva species is poorly understood, stemming from a lack of diagnostic, non-molecular systematic characters. This study addresses the following questions: i) Do the two genera represent distinct entitiesj ii) What are the relationships among local putative species; iii) Do the recognized species represent monophyletic lineages; iv) How closely are local species related to those from elsewhere? These questions are addressed us
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Circuncisão, Ana Rita Sousa. "Análise do perfil nutricional de Ulva rigida cultivada sob diferentes condições em sistema de aquacultura integrada multi-trófica." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22891.

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Mestrado em Bioquímica - Bioquímica Alimentar<br>Recentemente, tem surgido um elevado interesse na utilização comercial das macroalgas, sobretudo no setor alimentar, devido aos seus constituintes que na maioria exibem múltiplas bioatividades benéficas para a saúde. A Ulva rigida é uma macroalga verde, cosmopolita, capaz de se adaptar a uma vasta gama de condições ambientais, tornando a sua reprodução possível ao longo de todo o ano. Desta forma, torna-se uma espécie promissora de ser integrada num sistema de IMTA (aquacultura integrada multi-trófica) onde geralmente ocorre a manipulação
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Pinheiro, Valentina Alexandra Francisco Alves. "Avaliação de alterações físico-químicas das algas Gracilaria sp. e Ulva rigida sujeitas a diferentes tratamentos de conservação." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22765.

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Mestrado em Biotecnologia Alimentar<br>A alga verde Ulva rigida e a alga vermelha Gracilaria sp. são algas edíveis e constituem uma fonte rica de nutrientes. No entanto, devido à sua elevada humidade, são um alimento muito perecível e por isso muitas vezes sujeitas a processamentos como forma de aumentar o seu tempo de prateleira. Neste contexto, este trabalho pretendeu avaliar o impacto de processamento de secagem a 25 ºC, salmoura e salga (28 e 40%) nas alterações físico-químicas de U. rigida e G. sp., considerando o seu tempo de armazenamento. Mais especificamente, as alterações de textura
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Pilatti, Fernanda Kokowicz. "Ultraestrutura, bioquímica e fingerprint metabólico de Ulva lactuca Linnaeus (Chlorophyta) após exposição aguda ao diesel e à gasolina." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/174891.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Biologia Celular e do Desenvolvimento, Florianópolis, 2016.<br>Made available in DSpace on 2017-04-18T04:12:49Z (GMT). No. of bitstreams: 1 344486.pdf: 18193868 bytes, checksum: 7ecbdb40a13855e053a7f241ef18cf0c (MD5) Previous issue date: 2016<br>Os combustíveis fósseis são responsáveis por uma fração considerável da poluição que atinge os ecossistemas marinhos, sendo a gasolina e o óleo diesel são os mais consumidos no mundo. As macroalgas possuem grande importância ecológic
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43

Robic, Audrey. "Etude de la variabilité chimique, physico-chimique et rhéologique des ulvanes, polysaccharides des parois cellulaires d'algues marines vertes de la famille des Ulves (Ulvales, Chlorophyta)." Nantes, 2008. http://www.theses.fr/2008NANT2104.

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Les algues vertes appartenant aux genres Ulva et Enteromorpha sont communes à travers le monde. Elles prolifèrent localement sous la forme de « marées vertes » et sont source de nuisances. Elles sont riches en polysaccharides parmi lesquels les ulvanes représentent par leurs caractéristiques chimiques et gélifiantes un atout pour valoriser ces algues. Le rendement d’extraction, la variabilité chimique, physico-chimique et rhéologique d’ulvanes d’algues contribuant aux marées vertes (U. Rotundata et U. Armoricana) ont été étudiés en fonction de la période de récolte et du mode de conservation d
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Araujo, Leonardo. "Mecanismos de resistência inata e induzida por ulvana à infecção de Colletotrichum gloeosporioides (Penz.) Penz." reponame:Repositório Institucional da UFSC, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/93536.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-graduação em Recursos Genéticos Vegetais, Florianópolis, 2010<br>Made available in DSpace on 2012-10-24T23:50:58Z (GMT). No. of bitstreams: 1 274964.pdf: 1041847 bytes, checksum: 78f57ef1cf2c57cdff4ea5a802c1bb57 (MD5)<br>Este trabalho teve como objetivo avaliar e comparar os mecanismos de defesa inata e induzida pela aplicação de ulvana à infecção de Colletotrichum gloeosporioides em macieira. Para tanto, plântulas resistentes foram tratadas com água destilada aos 6 dias antes da inocu
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45

陳旻佐. "Evaluation on the bioactivity of Ulva lactuca and Ulva wine spent." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/07403601829206019254.

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46

Kidgell, Joel Thomas. "The structure and bioactivity of ulvan, a sulfated polysaccharide from Ulva (chlorophyta)." Thesis, 2021. https://researchonline.jcu.edu.au/69842/1/JCU_69842_Kidgell_2021_thesis.pdf.

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Joel Kidgell studied ulvan, a unique sulfated polysaccharide from green seaweeds of the genus Ulva. His research detailed how the chemical structure of these molecules is critical in their application as a biomaterial ranging from wound dressings to tissue scaffolds.
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Yu, Cheng-Hao, and 游政豪. "Simulating phosphatic fossilization with Ulva fasciata." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/95178605746485527791.

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碩士<br>國立清華大學<br>分子與細胞生物研究所<br>94<br>An extraordinary fossil record of multicellular life were found in phosphorites from the Precambrian Doushantuo Formation（550~600 Mya）, southern China. These fossils, which three-dimensional cellular structure details were perfectly preserved, have been classified as animal embryo, larva, and adult forms, as well as multicellular thallophytes, giant acritarch, and spheroidal chlorophyta. The well-preserved structural details indicates a rapid burial process, thus it is possible to simulate fossilization process in laboratory time. Ulva fasciata, a green a
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Hung, Yueh-Hao, and 洪悅豪. "Study on the Production of Ulvan and Ulvan Oligosaccharides and Their Biological Activity and Assessment of Lactic Acid Fermentation from Ulva Residue." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5r3es7.

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碩士<br>國立臺灣海洋大學<br>食品科學系<br>106<br>This study is aim to analyze characteristic and bioactivities of ulvan oligosaccharides produced by enzymatic hydrolysis and investigate conditions of lactic acid fermentation of Ulva residue. Firstly, ulvan were gained from Ulva lactuca powder that treated by hot-water (110oC/75 min), then collected by ultrafiltration system (> 30 kDa), and precipitated in 95% ethanol. The yield of ulvan is 15.89% (15.89 g of ulvan obtained from 100 g of Ulva lactuca powder), and the total sugar, reducing sugar, uronic acid, sulfate, protein and total phenols of ulvan are 48.
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Chou, Hsiang-Ling, and 周湘凌. "Effects of Ulva fasciata Hexane Extract or Ulva fasciata Oligosaccharides on Glucose Metabolism in Human Caco-2 and HepG2 Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7k529g.

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碩士<br>國立臺灣海洋大學<br>食品科學系<br>107<br>Insulin resistance (IR) is one of the characteristics of type 2 diabetes. This study was aimed to investigate the anti-diabetics effects and mechanisms of Ulva fasciata hexane extract (UF) or Ulva fasciata oligosaccharides (UO) in human intestinal and hepatic cells. Firstly, the fatty acid analysis revealed that the most abundant unsaturated fatty acids in UF were α-linolenic acid (C18:3 n3; 17.51 mg/g), linoleic (C18:2 n6c; 9.68 mg/g), oleic (C18:1 n9c; 1.98 mg/g) and palmitoleic (C16:1; 1.08 mg/g). The contents of carotenoids, chlorophyll a and chlorophyll b
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Yu, Hsin-Han, and 余信翰. "Studies on physiological activity of Ulva clathrata extractives." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/76976501784191734176.

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碩士<br>國立臺灣海洋大學<br>食品科學系<br>99<br>The purpose of this research was to clarify the antioxidant activity of Ulva clathrata water soluble extractives. The maximal polysaccharides contents were extracted by adding one hundred volumes of de-ionized water to original algae weight, and heating at 100oC for 1 hour. The hot-water extractives by acid and base treatment or precipitation used adding four volumes of 95% ethanol. Each extractive from Ulva clathrata was hydrolyzed by enzyme. The tentative compositions and antioxidant activities of extractives were determined, respectively. According to result
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