Dissertations / Theses on the topic 'Sodium flux'
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Verma, Vasudha. "Development of a Neutron Flux Monitoring System for Sodium-cooled Fast Reactors." Doctoral thesis, Uppsala universitet, Tillämpad kärnfysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-319945.
Full textGrishina, Olga. "Étude des flux unidirectionnels du 22Na et du 36Cl dans le modèle des anses ligaturées chez le rat, in vivo." Lyon 1, 1997. http://www.theses.fr/1997LYO1T287.
Full textKumar, Mithlesh. "Magnetic flux distorsion in two-phase liquid metal flow." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/15854/1/Kumar_1.pdf.
Full textBarbier, Lucie. "Dynamique des flux de fondants routiers et influence sur la pollution routière au sein d’un bassin de rétention-décantation." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0031/document.
Full textIn severe winter conditions, the application of deicer salts (mainly sodium chloride -NaCl) ensures the safety of network users. However, its spreading carries contamination risks of aquatic and terrestrial ecosystems. On the road, Na+ and Cl- are transported by runoff water to retention-decantation ponds. These ponds do not have the capacity to efficiently treat this flux of deicer salts in dissolved form. In addition, they allow the modification of water and soil chemistry, generating the mobility of metallic pollutants. The objective of this thesis is to study the deicer salt transfer and to determine its role in the release of pollutants during winter. The characteristics of the pond located in Azerailles (Lorraine, France) on a medium-frequented national road were studied, as well as the weather and salting conditions, the composition of the suspended matters and the concentration of traces metals. The results highlighted that between 50 and 90 % of Cl- was collected by the pond. The pond acts as a buffer which allows a release of the collected Cl- diluted during the runoff period following the salting period. The presence of NaCl in runoff water reduced the quality of suspended solids with the presence of organic markers of road pollution and the increase of zinc. It also influenced the increase of zinc in water, the chemical composition and the speciation of elements
Clavé, Corinne. "Flux ioniques et energetique cellulaire au cours de l'induction de la competence chez streptococcus pneumoniae, leur implication dans le transport de l'adn." Toulouse 3, 1988. http://www.theses.fr/1988TOU30063.
Full textRanganathan, Sreenivasan. "Influence of Dusts on Premixed Methane-Air Flames." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-dissertations/86.
Full textAka, Gérard. "Alumino-gallates de sodium-lanthanide de type alumine beta, magnetoplombite ou mixte : cristallochimie, etude spectroscopique et proprietes physiques." Paris 6, 1988. http://www.theses.fr/1988PA066008.
Full textRaymond, Sébastien. "Incertitudes des flux transportés par les rivières (Matière en suspension, nutriments, sels dissous) Vers un système expert d'optimisation des méthodes de calcul." Phd thesis, Université François Rabelais - Tours, 2011. http://tel.archives-ouvertes.fr/tel-00714017.
Full textStein, Antoinette Weil. "Investigation of the Chemical Pathway for Gaseous Nitrogen Dioxide Formation during Flue Gas Desulfurization with Dry Sodium Bicarbonate Injection." Cincinnati, Ohio : University of Cincinnati, 2001. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin997940666.
Full textSrinivasn, Rangesh. "Study of Trona (Sodium Sesquicarbonate) Reactivity with Sulfur Dioxide in a Simulated Flue Gas." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1078173060.
Full textGacem, Lakhdar. "Cristallogenèse et caractérisations du diphosphate Na2ZnP2O7 pur et dopé et de la solution solide de type pérovskite Na(1x)BaxNb(1x)TixO3." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00474354.
Full textSemenoff, Tereza Aparecida Delle Vedove [UNESP]. "A utilização do lauril-sulfato de sódio associado ao hidróxido de cálcio (HcT10) aumenta o fluxo salivar em pacientes submetidos à radioterapia." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/102351.
Full textObjetivo: Avaliar o fluxo salivar e a fração de eliminação cintilográfica de pacientes tratados com bochecho de lauril-sulfato de sódio associado ao hidróxido de cálcio (HcT10) durante ou após o tratamento radioterápico na região cervicofacial. Casuística e método: Os pacientes foram divididos em dois grupos: O grupo I (G1) foi composto por pacientes pós-irradiados (n=20) e o grupo II (G2) por pacientes que seriam submetidos à radioterapia no início deste estudo (n=23). Os pacientes foram avaliados através de sialometria, tendo sido realizada uma coleta de saliva antes do início dos bochechos e 4 outras a cada 14 dias (C1-C5), e de cintilografia, sendo uma realizada antes do início dos bochechos e outra entre 3 e 4 meses depois. Dois pacientes do G1 e oito pacientes do G2 não fizeram as secundas cintilografias. Resultados: Houve, a partir de C4, aumento significativo na quantidade de saliva quando comparada à C1 (p<0,05) para o G1 e decréscimo da quantidade de saliva para o G2 mesmo com o uso do HcT10 (p<0,05). Os resultados da cintilografia demonstraram que houve aumento da função das glândulas parótidas do G1 (p<0,05), sem, entretanto haver diferenças para as glândulas submandibulares (p>0,05). Em relação ao G2 houve decréscimo da função de todas as glândulas salivares (p<0,05). Conclusão: O HcT10 mostrou-se benéfico para o aumento de saliva no G1, porém não foi capaz de manter a quantidade de saliva para o G2
Objective: To evaluate salivary flow and the scintigraphic elimination of patients treated with a rinse of sodium lauryl sulphate associated with calcium hydroxide (HcT10) during or after radiation therapy in the cervicofacial area. Methods: Patients were divided into two groups: Group I (G1) was composed with post-irradiated patients (n=20) and Group II (G2) was composed with patients who were undergoing radiotherapy at the start of this study (n=23). Patients were evaluated by sialometry - one saliva collection before the start of mouthwash and 4 other every 14 days (C1-C5), and scintigraphy, the first one performed before the start of the mouthwash and the last one between 3 and 4 months later Two patients in G1 and eight patients in G2 did not perform the secondary scintigraphy. Results: There was, from C4, a significant increase in the amount of saliva when compared to C1 (p<0.05) for G1 and a decreased amount of saliva into G2 even with the use of HcT10 (p<0.05). The results of scintigraphy demonstrated an augmentation in the parotid gland function in G1 (p<0.05), without, however there are differences in the submandibular glands (p>0.05). Regarding the G2 to a decrease in light of all the salivary glands (p<0.05). Conclusion: HcT10 proved to be beneficial to increase salivary flow in G1, but it was unable to keep the amount of saliva for the G2
Bendahhou, Saïd. "Le Canal sodique voltage-dépendant des fibres nerveuses et musculaires du calmar Loligo forbesi. Purification, reconstitution fonctionnelle et approche en biologie moléculaire." Rouen, 1991. http://www.theses.fr/1991ROUES049.
Full textSchenck, Charles. "Pollution saline de l'eau souterraine et de l'air liee aux activites economiques en haute alsace : incidences agronomiques." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13220.
Full textCorreia, Christiano Marinho [UNESP]. "Avaliação do fluxo salivar total não estimulado durante e após radioterapia, com o uso do lauril-dietileno-glicol-éter-sulfato de sódio associado ao hidróxido de cálcio." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/102353.
Full textOs tratamentos utilizados para a prevenção da xerostomia não atingem a eficácia esperada pelos pacientes, podendo ainda produzir efeitos colaterais indesejáveis. O objetivo deste trabalho foi avaliar quantitativamente o índice de fluxo salivar total não estimulado de pacientes portadores de câncer de cabeça e pescoço durante e após tratamento radioterápico exclusivo tratados com a associação de laurildietileno- glicol-éter-sulfato de sódio e hidróxido de cálcio (HcT20). Este estudo foi realizado no Hospital Dr. Hélio Angotti envolvendo trinta e um pacientes (n=31) divididos em dois grupos: o grupo I composto por dezessete pacientes (n=17) submetidos à telecobaltoterapia, na dose total de 7.000 cGy e receberam o HcT20 durante o tratamento. O grupo II composto por quatorze pacientes (n=14) iniciaram o uso do HcT20 após a conclusão da radioterapia. Foram realizadas e mensuradas coletas semanais do índice de fluxo salivar total não estimulado para os pacientes dos dois grupos. Os valores obtidos foram analisados estatisticamente através dos testes de aderência à curva normal, teste de Bartlett, teste de Friedman e teste de Wilcoxon, visando avaliar a eficácia do HcT20 tanto na prevenção da queda acentuada do fluxo salivar durante a radioterapia quanto na hipofunção salivar no período pós-radioterapia. Os pacientes do grupo I, ao término da radioterapia, mantiveram o índice de fluxo salivar total não estimulado em relação aos valores basais; os do grupo II, que utilizaram a associação medicamentosa após radioterapia, apresentaram melhora acentuada no índice de fluxo salivar total não estimulado em relação ao basal; e o uso do HcT20 apresentou melhor resultado quando utilizado durante a radioterapia.
The treatments used to prevent the xerostomy do not reach the efficiency expected by the patients, and it can have undesirable effects. The goal of this report was to make a quantifiable evaluation of the total non stimulated salivary flow index in patients with head and neck cancers during and after the exclusive radiotherapy with an association of lauryl-diethylene-glycol-ether sodium sulfate and calcium hydroxide (HcT20). This study was held at the hospital Dr. Hélio Angotti involving thirty one patients (n=31) divided into two groups: Group one had seventeen patients (n=17) submitted to fractioned radiation treatment in the head and neck region at the total dose of 7.000 cGy and had HcT20 during the treatment. Group two with fourteen patients (n=14) started with the use of HcT20 after the end of radiotherapy. A weekly and measured collection of the index of the total non stimulated saliva flow was done on the patients of both groups. The values that were obtained were analyzed statistically through the Bartlett test, the Friedman test and the Wilcoxon test, to seek an evaluation of the effectiveness of the medication on the prevention of the intense drop of the salivary flow during the radiotherapy and do avoid the xerostomy during the postradiotherapeutic period. The patients from group one at the end of the radiotherapy kept the base index of the total non stimulated salivary flow, the ones from group two that used the medication association after the radiotherapy had a great improvement of the total non stimulated salivary flow and the usage of HcT20 had a better result on the index of salivary flow during the radiotherapy.
Udy, Sandra. "Assessing Amendment Treatments for Sodic Soil Reclamation in Arid Land Environments." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7670.
Full textDedini, Denise. "Avaliação de um sistema de fluxo continuo de desinfecção de agua por radiação solar, cloração e radiação ultra violeta." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257797.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-09T19:14:11Z (GMT). No. of bitstreams: 1 Dedini_Denise_M.pdf: 3982873 bytes, checksum: 127e10ee6b1c23954d0179d570c4b2fe (MD5) Previous issue date: 2006
Resumo
Abstract
Mestrado
Saneamento e Ambiente
Mestre em Engenharia Civil
Leandro, Sandra Márcia. "Sobrecarga e restrição de sal na dieta durante a gestação em ratas Wistar: efeitos sobre o sistema renina-angiotensina, função renal, resistência à insulina e pressão arterial." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/5/5148/tde-08012007-172716/.
Full textMany epidemiological studies have linked diseases in adulthood, such as type-2 diabetes and hypertension, to adverse intrauterine environment during fetal life. Distinct factors related to dietary habits, such as salt intake, may have a major impact on the perinatal period. Recently, we have demonstrated that low-salt diet (LSD) during pregnancy is associated with low birth weight and diseases during adulthood. The aim of this study was to evaluate the effect of LSD and high-salt diet (HSD) during pregnancy in rats. Female Wistar rats were fed with LSD, normal-salt diet or HSD since 8 weeks of age and matted with 12 weeks of age. These animals were studied at the third week of gestation and one additional group of virgin rats was evaluated as a control for the gestation effect. Placenta and fetus weight and uterine blood flow were lower and peripheral vascular resistance was higher in the LSD group. In the placenta from HSD rats, higher lipid peroxidation and AT1 receptor mRNA were observed. In conclusion, fetal weight, placenta weight and uterine blood flow are influenced by the degree of salt consumption during pregnancy.
Junior, Walter Luiz Siqueira. ""Estudo de alguns parâmetros salivares em indivíduos com síndrome de DOWN"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-13062005-115943/.
Full textThe aim of this study was to measure the flow rate, pH, buffer capacity, sialic acid, total protein concentrations, amylase and peroxidase activities and sodium, potassium, calcium, phosphorus, zinc and magnesium concentration whole saliva of individuals with Down syndrome aged 1 - 25 years. In individuals aged 1-5 years the whole saliva was collected under slight suction, while in the others individuals aged 6-10, 11-15, 15-20, 21-25 the whole saliva was collected with stimulation by chewing a piece of parafilm, for 10 minutes. The pH and the buffer capacity were determined using a digital pHmeter. The buffer capacity was measured by titration with 0.01 N HCl. Electrolyte concentrations were determined by inductively coupled argon plasma with atomic emission spectrometry. Sialic acid was determined by thiobarbituric acid assay. Protein was determined by the folins phenol reagent. Amylase was assayed measuring the maltose produced by the breakdown of starch and peroxidase with ortho dianisidine. For statistical analysis the date are presented as mean ± SD. Students t test was used to determine differences between the mean of the Down syndrome and control groups. No statistically significant differences were observed in sialic acid, phosphorus, zinc, magnesium and calcium concentration between the individuals with Down syndrome and control group. The sodium and total protein concentration and buffer capacity showed higher in the Down syndrome than in the control group. On the other hand the flow rate and potassium concentration, amylase and peroxidase activities were lower in the Down syndrome than in the control group. These results suggest that the Down syndrome persons present alteration in the metabolism of the duct and/or acinar cells of salivary glands.
Lucas, Steven Andrew. "Temporal Sodium Flux In A Woodlot Soil Irrigated With Secondary Treated Effluent: The Implications For Sustainable Irrigation And Soil Management." Thesis, 2007. http://hdl.handle.net/1959.13/24997.
Full textPhD Doctorate
Lucas, Steven Andrew. "Temporal Sodium Flux In A Woodlot Soil Irrigated With Secondary Treated Effluent: The Implications For Sustainable Irrigation And Soil Management." 2007. http://hdl.handle.net/1959.13/24997.
Full textPhD Doctorate
Huang, Yi-Da, and 黃奕達. "Direct contact membrane distillation─Analysis of scaling morphology and its influence on the flux performance for sodium chloride and calcium carbonate systems." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/fd47k3.
Full text中原大學
化學工程研究所
102
Due to the growing problem of globally water scarcity nowadays﹐much attentions have been payed applying desalination process. Membrane distillation (MD) is expected to be a potential technology for desalination as compared to reverse osmosis, not only the better water quality that it can produce , but it also can provide a higher water recovery. However, there is still very few applications for MD in industries .One of the major reasons is the lack of knowledge in scaling effect of the process. In this study, we analyzed the scaling morphology of sodium chloride and calcium carbonate salts and its effect on the MD flux, respectively. We also used the simulation program and experiments to study the effects of feed temperature , feed concentration and feed flow rate etc. on the flux. Simulated results showed that the difference in fluxes predicted with and without considering concentration polarization can up to 7.4% and 26.5% for feed concentration at 15 wt% and 24 wt% , respectively. Direct contact membrane distillation experiments were carried out with a flat sheet module to observe the flux performances of NaCl and CaCO3 salts feed solution. The membrane scaling was examined by SEM-EDS analysis.Results showed the flux is almost unchanged and it have just a minor scaling problem after 8 hours operation for feed of 3 wt% NaCl solution at 70 oC. However, as the feeds with 15 wt% and 24 wt% NaCl concentration, 10% and 36% flux decline were observed and the membrane surface have deposited a dense scaling layer. On the other hand, based on the calcium and bicarbonate ions concentrations in seawater and that in concentrate stream from RO desalination process with 40 % water recovery, we also prepared the feeds for DCMD experiments.The scaling at 70℃is formed by sphericalsmall precipitates, , but it has the needle-like rode structure when operation is at 50℃. Through detecting the time dependent pH valuein the feed stream, it indicates that more faster CaCO3 precipitation rate will occur at higher feed temperature and salt concentration. In this study, we also calculated the saturation index(SI) at the membrane surface. The SI value for CaCO3is about 246.37 for concentrated solution at 70℃, and it means the membrane surface have large amount deposit on it. When the feed was conditioned to pH=6, the SI value evaluated at the membrane surface is equal to 1 and experimental results showed that there is almost no decline in flux under such condition.When the feed solution is prepared by mixing NaCl and CaCO3 salts, its MD behavior is similar to the feed only with CaCO3salt. Besides, we have also discussed how to clean the membrane to make it recover the flux performance. The scaling by NaClon the membrane surface can completely flushed by water, so we can see the apparently flux recovery. However, using fresh water to flush the membrane have not significant effect for CaCO3 scaling. butthe flux can recover close to the initial fluxif the scaled membrane is flushed with 0.1 wt% citric acid solution.