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Dissertations / Theses on the topic 'Nitrate toxicity'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Jiquiriçá, Paulo Ricardo Ilha. "Efeitos letais e subletais da poluição por nitrogênio em larvas de anuros." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-13122010-144109/.

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As atividades humanas vêm aumentando dramaticamente a quantidade de nitrogênio inorgânico liberado nos ecossistemas, seja através da aplicação de fertilizantes na agricultura, da descarga de dejetos humanos e de seus rebanhos, ou da queima de combustíveis fósseis. Os excessos de nitrogênio são eventualmente transportados para corpos d´água, onde podem, na forma de nitrato, nitrito e amônio, atingir concentrações tóxicas para organismos aquáticos. Nesta pesquisa tive dois objetivos principais. O primeiro foi testar em laboratório a toxicidade relativa dos íons nitrato, nitrito e amônio, e a var

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2

Khodaparast, Zahra. "Toxicity of silver nanoparticles and silver nitrate on Nassarius reticulatus larvae." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15327.

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Mestrado em Toxicologia e Ecotoxicologia<br>Production and utilization of silver nanoparticles (AgNPs) for various applications is growing rapidly, mainly due to their antibacterial activity. Their inclusion in many consumer products led to an increased release of AgNPs in the environment, especially in aquatic ecosystems. AgNPs reach both freshwater and marine environments from the effluents of the wastewater treatment plants, presenting differentiated behavior in these two environments potentially influencing its toxicity. The study of AgNPs toxicity to marine organisms is extremely importa

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3

Domingues, Vasco Filipe de Castro. "Toxicity of silver nanoparticles and silver nitrate to the freshwater planarian Dugesia tigrina." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17016.

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Mestrado em Toxicologia e Ecotoxicologia<br>Atualmente, as nanopartículas de prata (AgNP) são bastante utilizadas em vários produtos devido às suas propriedades únicas e excecionais, nomeadamente a sua potente atividade antibacteriana. Algumas das suas aplicações comuns são em têxteis, produtos cosméticos e tintas. Deste modo, é esperada a presença de AgNP nos sistemas aquáticos. Tendo isto em consideração, o objetivo deste trabalho é descrever os efeitos tóxicos de AgNP de diferentes tamanhos, e comparar estes efeitos com os induzidos pela exposição a AgNO3 usando as características comportam

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4

Lupica, Samuel J. "Nitrate Toxicity to Common Carp Measured Noninvasively by Novel Enzyme-linked Immunosorbent Assay for Cortisol." University of Toledo Health Science Campus / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=mco1226956326.

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5

Muratti, Ortiz Joseph F. "Comparative Toxicity Responses in Earthworms Lumbricus Terrestris and Eisenia Foetida to Cadmium Nitrate and Chlordane Using Artificial Soil and Filter Paper Exposures." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc500857/.

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This research compares LC50 and LD50 of earthworms, Lumbricus terrestris and Eisenia foetida exposed to cadmium nitrate and chlordane using 48-h contact filter paper (FP) and 14-d artificial soil (AS) protocols. Both LC50 and LD50 showed that chlordane was more toxic than cadmium in both species regardless of the exposure. The reference toxicant 2-chloroacetamide using the standardized 48-h FP exposure was used to assess the general response of the earthworm prior to toxicity experiments. A glucose test was developed as an internal standard to assess homogeneity of mixtures among both replicat

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6

Batina, Pierre. "Aspects metaboliques et toxicologiques de l'erythrocyte chez le rat traite aux nitrates et aux nitrites." Toulouse 3, 1988. http://www.theses.fr/1988TOU30196.

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7

Janke, Helena. "Avaliação ecotoxicológica da adição de nitrato em sedimentos eutrofizados da Represa Ibirité (Betim MG): experimentos em microcosmos." Universidade Federal de São Carlos, 2009. https://repositorio.ufscar.br/handle/ufscar/1953.

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Made available in DSpace on 2016-06-02T19:31:43Z (GMT). No. of bitstreams: 1 2493.pdf: 1820155 bytes, checksum: c4fbdc0a3fdb7a9316ba5c6c6a6905c8 (MD5) Previous issue date: 2009-05-15<br>Universidade Federal de Sao Carlos<br>The objective of the present dissertation was to make a toxicity assessment of the application of calcium nitrate solution as a remediation procedure for sediments of a eutrophic aquatic ecosystem. The study was carried out using microcosms with superficial sediments and water from sediment-water interface of the Ibirité Reservoir located in the metropolitan area of Belo

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8

Osman, Alaa Gad El-Karim Mahmoud. "Embryo-toxic effects of lead nitrate of the African catfish Clarias gariepinus (Burchell, 1822)." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2007. http://dx.doi.org/10.18452/15612.

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Im Rahmen der Studien zur Wirkung von Bleinitrat auf die Embryonalstadien des afrikanischen Welses Clarias gariepinus wurde zunächst der Einfluß der Besamung auf den Härtungsprozess des Chorions untersucht, um die Bedeutung des gehärteten Chorions als Schutzfunktion im Hinblick auf Schadstoffeinwirkung zu klären. Das Studium der Embryonalentwicklung war erforderlich, um das Ausmaß der Änderung der Normalentwicklung unter dem Einfluß von Bleinitrat bewerten zu können. Im Rahmen der toxikologischen Untersuchungen der Wirkung des Bleinitrats auf die Embryonalstadien wurden folgende biologische Ma

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9

Costa, Luiza Dy Fonseca. "Toxidade aguda da amônia e do nitrito para juvenis do pampo Trachinotus marginatus (CUVIER, 1832) em diferentes salinidades." reponame:Repositório Institucional da FURG, 2008. http://repositorio.furg.br/handle/1/2409.

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Dissertação(mestrado)-Universidade Federal do Rio Grande, Programa de Pós-Graduação em Aqüicultura, Instituto de Oceanografia, 2008.<br>Submitted by Cristiane Silva (cristiane_gomides@hotmail.com) on 2012-08-10T12:19:02Z No. of bitstreams: 1 Luiza.pdf: 183731 bytes, checksum: 0b5ee5a01d33ee313ae943f665008553 (MD5)<br>Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2012-08-21T17:28:37Z (GMT) No. of bitstreams: 1 Luiza.pdf: 183731 bytes, checksum: 0b5ee5a01d33ee313ae943f665008553 (MD5)<br>Made available in DSpace on 2012-08-21T17:28:37Z (GMT). No. of bitstream

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Espey, James Lee. "Acute Toxicity of Ammonia and Nitrite to Yellow Perch, Perca flavescens." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-07272003-163356/.

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A series of static toxicity tests were conducted to determine the tolerance of yellow perch to ammonia and nitrite on larvae, juvenile and adult fish. Toxicity tests on adults were conducted at 18, 22, and 25 C. The tests on larvae showed highly varible results and were ultimately inconclusive. The 96h LC50 for ammonia and nitrite to juveniles were 0.77 mg/L as NH3-N and 78.24 mg/l as NO2-N, respectively. Adult and juvenile yellow perch had similiar tolerance levels. lc50 values for ammonia and nitrite varied with temperature and were 0.64 mg/l as NH3-N and 65.8 mg/l as NO2-N, respectively at

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11

Bachtsevani, Eleftheria. "In vitro assessment of the toxicity of pesticides on ammonia-oxidizing microorganisms." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2024. http://www.theses.fr/2024ECDL0049.

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L'utilisation de pesticides est essentielle pour augmenter les rendements agricoles, mais ces produits chimiques peuvent manquer leurs cibles, s'accumuler dans le sol et nuire aux micro-organismes qui sont importants pour la santé de l'écosystème. Les évaluations traditionnelles des risques liés aux pesticides n'ont pas entièrement pris en compte la toxicité des pesticides pour les micro-organismes. Pour remédier à cette situation, un système à plusieurs niveaux a été proposé pour évaluer les effets des pesticides sur un groupe microbien clé, les micro-organismes oxydant l'ammoniac (AOM). Le s

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12

KAMMERER, CROMBET MARTINE. "Etude experimentale de la toxicite chronique de l'ion nitrate chez le lapin." Nantes, 1994. http://www.theses.fr/1994NANT2078.

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La pollution par les nitrates des ressources en eau conduit a une augmentation sensible de la teneur en nitrate de l'eau d'abreuvement des animaux de rente. Dans le but d'etudier les differentes hypotheses d'action toxique chronique evoquees par les observations epidemiologiques, une etude experimentale a ete conduite chez le lapin. Les animaux ont recu de l'eau renfermant 7, 60, 120, 180, 250, 300, 500 ou 600 mg de no#3-/1, pendant 5 a 8 mois. Ils ont fait l'objet de diverses analyses hematologiques et biochimiques, d'un suivi de croissance et d'une etude des fonctions de reproduction. Au bil

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13

Schuler, Dominic. "Acute toxicity of ammonia and nitrite to Pacific White Shrimp (Litopenaeus vannamei) at low salinities." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32453.

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The Pacific white leg shrimp, Litopenaeus vannamei, is a potential species for low salinity inland aquaculture. Due to several independent variables, such as species, age, size, salinity and pH, that must be taken into account, there are gaps in the literature pertaining to the toxicity of ammonia and nitrite to shrimp. This study was conducted to investigate the individual and combined effects of ammonia and nitrite on L. vannamei postlarvae (25-45 days old) at 10 ppt salinity, 28 C and a pH of 7.8. The independent variables were salinity, total ammonia as nitrogen (TAN) and nitrite-N (NO2-N)

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14

Paula, Ricardo Bernardino de. "Efeitos do 2-nitrato-1,3-di(octanoxi)propano (NDOP) em aorta de camundongo C57BL/6." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/8840.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-02-20T11:58:45Z No. of bitstreams: 1 arquivo total.pdf: 1664038 bytes, checksum: 10c74036755f7796ffefc80faf342151 (MD5)<br>Made available in DSpace on 2017-02-20T11:58:45Z (GMT). No. of bitstreams: 1 arquivo total.pdf: 1664038 bytes, checksum: 10c74036755f7796ffefc80faf342151 (MD5) Previous issue date: 2016-11-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Organic nitrates have been used in cardiovascular disorders therapy because they work as nitric oxide (NO) donors. The present study aimed to characte

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15

Drocco, Camilla. "Assessment of the toxicity of pesticide mixtures on soil microorganisms." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCK036.

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Dans le cadre du projet ARISTO, ma thèse aborde la nécessité de faire progresser l'évaluation des risques engendrés par l’utilisation de pesticides pour les microorganismes du sol. Etant donné l'ampleur des applications annuelles de pesticides et l'accumulation possible des ingrédients actifs et de leurs produits de transformation dans le sol, il devient urgent de développer une stratégie d'évaluation des risques précise et efficace. Dans cette thèse, une attention particulière est portée aux microorganismes nitrifiants car ils jouent un rôle crucial dans le cycle de l'azote dans le sol. Par a

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16

Cruz, Beatriz Agostinho da. "Assessement of the effects and interactions of nitrates and salinity in Echinogammarus meridionalis, isolated and in mistures." Master's thesis, Universidade de Aveiro, 2018. http://hdl.handle.net/10773/22045.

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Mestrado em Toxicologia e Ecotoxicologia<br>Freshwater ecosystems are among the world's most vulnerable ecosystems to climate change. These climatic changes have affected negatively the ecosystems, with the mean sea level rise leading to saline intrusion into freshwater ecosystems. Additionally, intensive agricultural practices and livestock production have been the cause of high concentrations of nitrates in groundwater and soil in various parts of the world. Due to these disturbances, namely in aquatic ecosystems, and imbalances, the variables salinity and nitrates were studied separately an

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17

Junior, João Cardoso de Souza. "Suprimento de nitrato e amônio e a tolerância do capim tanzânia ao estresse por excesso de cobre." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-18052017-142834/.

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O suprimento de proporções de nitrato (NO3-) e amônio (NH4+) no meio de crescimento pode otimizar o metabolismo e o crescimento do Panicum maximum. A toxidez de cobre (Cu) causa estresse oxidativo nas plantas, afetando o metabolismo, a fotossíntese e a produção de massa. Não há pesquisas associando proporções de NO3-/NH4+ no alívio do estresse por Cu em plantas. O objetivo foi avaliar o efeito da toxidez de Cu no metabolismo, nutrição mineral, fotossíntese e produção do capim tanzânia, assim como o papel de proporções de NO3-/NH4+ no alívio dessa toxidez. O delineamento experimental foi de blo

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18

Blanchet-Besson, Catherine. "Les Paramètres physico-chimiques en élevage larvaire intensif et la toxicité aiguë de l'ammoniaque et des nitrites vis-à-vis du loup Dicentrarchus labrax Linné, 1758." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37596085q.

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19

Hannas, Bethany Reeves. "Mechanistic evaluation of the reproductive and developmental toxicity of nitrate and nitrite." 2009. http://www.lib.ncsu.edu/theses/available/etd-08122009-141331/unrestricted/etd.pdf.

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20

WANG, LI-HSIANG, and 王立祥. "The effects of nitrate concentration on toxicity bioassay-in continous culture." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/90277894110353288108.

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21

Tsai-Su-Juen and 蔡淑君. "The acute toxicity and tissue accumulation of nitrate and its effects on nitrogen excretion and acid-base balance in Penaeus monodon under nitrate shock." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/77902427277400283183.

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碩士<br>國立海洋大學<br>水產養殖學系<br>88<br>The 96-h LC50 of nitrate on tiger shrimp Penaeus monodon was 5277、3453 and 2046 mg/l at 15, 25 and 35 ppt, respectively. The safe value of nitrate was P. monodon (0.297 ± 0.084 g，2.835 ± 0.62 cm) was estimated to be 141.3、178.2 and 204.6 mg/l at 15, 25 and 35 ppt, respectively. Ammonia-N excretion of shrimps (18.44 ± 0.58 g) increase, whereas urea-N excretion and organic-N excretion increased with concomitant increase of hemolymph ammonia and urea when the shrimps were exposed to elevated nitrate. The contribution of ammonia-N excretion, urea-N excret

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22

Hsu, Po-Kai, and 許博凱. "Functional Analyses of Two Nitrate Transporters, NRT1.11 and NRT1.12, and Molecular Mechanisms of an Ammonium Toxicity Mutant in Arabidopsis thaliana." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/39670815483960964473.

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博士<br>國防醫學院<br>生命科學研究所<br>101<br>Nitrogen is an essential nutrient for plants and its availability is critical for plant growth and development. Under a lot of conditions, nitrate is the primary nitrogen source for most plants. After uptaken from soil, nitrate can be assimilated or stored in both root and shoot. It is known that nitrate is transported from root to shoot via xylem. However, less is known about how root-derived nitrate is distributed efficiently to different tissues in the shoot, particularly to the developing tissues with high nutrient demand but low transpiration rates. In the

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23

Lo, Ming Jiang, and 羅明江. "Carcinogenicity and Toxicity of Trimethylamine and Its Effects by Nitrite." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/79900140749872396509.

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碩士<br>國立臺灣大學<br>生化學研究所<br>81<br>Squid contains a high level of naturally-occurring amines such as dimethylamine (DMA), trimethylamine (TMA), and tri- methylamine N-oxide (TMAO). Humans usually consumed dietary sodium nitrite from environment. This important problem was investigated in rats and the experimental results indicated that 10% dietary squid could induce the hepatocellular carcinoma in rats. The presence of sodium nitrite could enhance these toxic effects. Male Wista

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24

Frances, J. "Toxicity of ammonia and nitrite to silver perch (Bidyanus bidyanus)." Thesis, 1999. https://eprints.utas.edu.au/19700/7/Frances_whole_thesis_ex_pub_mat.pdf.

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Acutely toxic concentrations (LC\(_{50}\)) of ammonia and nitrite were estimated for juvenile silver perch (Bidyanus bidyanus) during 96h experiments. Additional experiments were conducted for at least 25 days to determine the growth-limiting concentrations of ammonia and nitrite for juvenile silver perch. Furthermore, the effects of exposure to metabolic and reagent ammonia were compared. Gill histopathology was examined in each experiment to determine if changes in gill structure correlated with exposure to toxicant, and whether gill histopathology was a useful indicator of sub-acute intoxic

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25

Espey, James L. "Acute toxicity of ammonia and nitrite to yellow perch, perca flavescens." 2003. http://www.lib.ncsu.edu/theses/available/etd-07272003-163356/unrestricted/etd.pdf.

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26

Lin, Yong-Chin, and 林永慶. "Study on the acute toxicity of nitrite and its stress response on Litopenaeus vannamei." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/57905926324770598986.

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碩士<br>國立海洋大學<br>水產養殖學系<br>90<br>Abstract Litopenaeus vannamei juveniles ( 3.97 ±1.40 g ) were exposed to different concentrations of nitrite-N (nitrite as nitrigon), using the static renewal method at different salinity levels of 15 ppt, 25 ppt and 35 ppt at 18℃. The 24, 48, 72, 96, 120 and 144 h LC50 of nitrite-N on L. vannamei juveniles were 187.9, 144.2, 92.5, 76.5, 67.1 and 61.1 mg/l at 15 ppt；274.1, 244., 224.8, 178.3, 164.3 and 152.4 mg/l at 25 ppt；521.2, 423.9, 375.0, 321.7, 281.2 and 257.2 mg/l at 35 ppt, respectively. As salinity decreased from 35 ppt to 15 and 25 ppt, the

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27

Hung, Chun-Chin, and 洪俊欽. "Study on the Acute Toxicity and Tolerance of Nitrite to Juvenile Silver Moony (Monodactylus argenteus)." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41749650814963882597.

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碩士<br>國立東華大學<br>海洋生物多樣性及演化研究所<br>101<br>Silver moony (Monodactylus argenteus) is a common ornamental fish and the development of its early life has been illustrated in detail. Furthermore, breed of silver moony can be operated artificially successfully while the ambient nitrite accumulates easily in intensive culture systems. Accumulation of nitrite causes various damages at different levels. The aim of this study is to evaluate the safe concentration of nitrite for culture and the physiological effects of nitrite on silver moony. Juvenile silver moony bred artificially from embryo stage until

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28

BULÍČEK, Vojtěch. "Vliv huminové látky HS 1500 na toleranci jesetera malého vůči dusitanům." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174014.

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The aim of the thesis was to assess the effect of humic substance HS 1500 on the tolerance of Sterlet (Acipenser ruthenus) to nitrite. Preparation Huminfeed was used as a source of substance HS 1500. Tolerance of Sterlet to nitrite was assessed on the basis of the results of acute toxicity tests and the results of haematological and biochemical blood examination of fish that were exposed to increased concentrations of nitrite in the presence and absence of preparation Huminfeed.

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Huang, Sha-li, and 黃莎莉. "Acute toxicity and sublethal effects of nitrite on morphometric indices and physiological responses of juvenile silver moony (Monodactylus argenteus)." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/75973211330392038577.

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碩士<br>國立中山大學<br>生物科學系研究所<br>103<br>Silver moony (Monodactylus argenteus) is a common aquarium ornamental species in Taiwan. Due to study on nitrite toxicity in silver moony is lack, an acute toxicity test was carried out by exposing the juvenile fish to 0, 25, 50, 75, 100 and 150 mg/L NO2−N for 96 h. The determined median lethal concentration (96 h - LC50) was 54.5 (42.5-67.9) mg/L NO2−N. The impacts of sublethal nitrite exposure were further investigated. After exposure to 28 mg/L (2 mM) NO2−N for 7 days, decrease of hepasomatic index and increase in plasma glucose levels, osmolality and chlo

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PODLESNÝ, Martin. "Změny biochemických ukazatelů u ryb v souvislosti se zvýšenými koncentracemi dusitanů ve vodě." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-44810.

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The aim of this thesis was to assess the effects of long-term nitrite exposure on mortality, growth rate and blood biochemistry in rainbow trout (Oncorhynchus mykiss). Furthermore, acute toxicity tests with nitrite were performed on rainbow trout (Oncorhynchus mykiss) and sheatfish (Silurus glanis). The theoretical part focuses on aquatic toxicology including toxicity evaluation of substances and preparations for water organisms. Detailed information on nitrite are summarized there, namely information on nitrite occurrence and sources in aquatic environment and the mechanism of their uptake an

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31

Tseng, I.-Hsing, and 曾奕軒. "Acute toxicity of nitrite and its sublethal effects on morphometrics, ionoregulation, stress response and energy metabolism in freshwater juvenile silver moony (Monodactylus argenteus)." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/a5jr7b.

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碩士<br>國立東華大學<br>海洋生物多樣性及演化研究所<br>102<br>Euryhaline silver moony (Monodactylus argenteus) is a familiar ornamental fish in Taiwan and usually reared in fresh water. Accumulation of nitrite to toxic level would occur in intensive and recirculating aquaculture systems. Therefore, establishment of a safe level of nitrite for rearing aquaculture species is important to avoid the harmful effects. In this regard, the acute tolerance of juvenile silver moony to nitrite and sublethal nitrite exposure were examined to evaluate an appropriate safe criterion. After exposure to different concentrations

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32

Davis, Belinda L. "Identification and characterisation of bacterial genes associated with resistance to and/or degradation of environmental pollutants." Thesis, 2011. https://vuir.vu.edu.au/16038/.

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Bacteria were previously isolated from two separate sites, one contaminated with lead and the other with Polycyclic Aromatic Hydrocarbons (PAHs). Alcaligenes sp. AO22 and Arthrobacter sp. E9 were identified from the lead contaminated site, while Stenotrophomonas maltophilia was identified from the PAH contaminated site. Minimum Inhibitory Concentration assays (MICs) were previously performed on Alcaligenes sp. AO22 and Arthrobacter sp. E9 and they were found to be resistant to varying levels of heavy metals and polymerase chain reactions suggesting the presence of mercury (mer), copper (pco) a

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