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Dissertations / Theses on the topic 'Sulfite determination'

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Published: 4 June 2021

Last updated: 7 February 2022

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1

Santos, Josué Carinhanha Caldas. "Avaliação e síntese de corantes fenotiazínicos para determinação espectrofotométrica de sulfeto e sulfito empregando sistemas de análise em fluxo." Programa de Pós-Graduação em Química da UFBA, 2004. http://www.repositorio.ufba.br/ri/handle/ri/10001.

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Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-04-23T12:23:58Z No. of bitstreams: 2 Josue Santos Parte 2.pdf: 931346 bytes, checksum: b1e5922db0717587a7942e5c09cc5b01 (MD5) Josue Santos Parte 1.pdf: 1888156 bytes, checksum: 5a369c2be9a8867bc37dbf7937760f92 (MD5)<br>Made available in DSpace on 2013-04-23T12:23:58Z (GMT). No. of bitstreams: 2 Josue Santos Parte 2.pdf: 931346 bytes, checksum: b1e5922db0717587a7942e5c09cc5b01 (MD5) Josue Santos Parte 1.pdf: 1888156 bytes, checksum: 5a369c2be9a8867bc37dbf7937760f92 (MD5) Previous issue date: 2004<br>Neste trabalho foram avalia

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2

Souza, Alex Sandra Nascimento De. "Influence of chemicals preservative on the determination of the total antioxidant activity in tropical juice acerola." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10918.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>The food industry uses chemical additives to extend the shelf life of its products and maintain their sensory and microbiological characteristics acceptable. However, the presence of preservatives in foods may interfere in the quantification of total antioxidant activity. Therefore, this study aimed to evaluate the influence of food preservatives on total antioxidant activity and on the sensory and microbiological quality of acerola tropical juice. The fruits were washed, sanitized (200 ppm sodium hypochlorite), pulped and then w

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3

Grippa, Alexander. "Structural investigation of Nb-based layer sulfides." Doctoral thesis, Stockholm University, Department of Physical, Inorganic and Structural Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-177.

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<p>In this work we have investigated the intercalation of electron-donors between NbS<sub>2</sub> slabs in Nb-based layer sulfides.</p><p>Two series of Sr substituted Nb-based misfit sulfides belonging to the 1.5Q/1H and 1Q/1H series of misfit layer compounds have been synthesised. For large lanthanides (Ln=La, Ce), only the 1Q/1H compounds formed whereas for smaller lanthanides and yttrium, both types of phases can be obtained. The crystal structure of misfit sulfide (Pr<sub>0.55</sub>Sr<sub>0.45</sub>S)<sub>1.15</sub>NbS<sub>2</sub> has been refined using the composite approach. In the Q-sla

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4

URIBE-JONGBLOED, ALBERTO. "DETERMINATION OF THE EFFECTIVENESS OF ANAEROBIC BIODEGRADATION OF PAHs AND ITS APPLICATION IN THE FORM OF A BIOWALL." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147969760.

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5

Hamilton, Andrew. "Determination of the structural requirements for modification of vascular endothelial growth factor angiogenic activity by heparan sulfate oligosaccharides." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/determination-of-the-structural-requirements-for-modification-of-vascular-endothelial-growth-factor-angiogenic-activity-by-heparan-sulfate-oligosaccharides(10c14190-247a-4c98-a120-eb0a1c63f246).html.

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Clinical manipulation of angiogenesis (the formation of new blood vessels from pre-existing vasculature) is of interest to treat diseases such as cancer and ischemic tissue where it is not properly regulated. Several treatments targeting vascular endothelial growth factor (VEGF) and its receptors - which are abundant at sites of angiogenesis - are currently in use to treat various types of cancer, however they have severe vascular side effects. Conversely, VEGF has been used clinically to promote angiogenesis to treat ischemic tissue. However, despite encouraging data from pre-clinical models,

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6

Eldridge, Stacie Liane. "Development of analytical methods for trace impurity analysis and structure determination of heparin/heparan sulfate-derived oligosaccharides." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1899476621&SrchMode=2&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269284173&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2009.<br>Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 10, 2010). Includes bibliographical references. Also issued in print.

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7

Mann, Jacqueline Lorraine. "Determination of sulfur isotope composition in sulfate from two high elevation snowpits by multi-collector thermal ionization mass spectrometry using a double spike." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2591.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Geology. 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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8

Bergh, Werner. "The determination of β-endosulfan and endosulfan sulfate in human serum with dialkylphosphate metabolites as urinary markers using LC-MS/MS electrospray ionization". Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/24498.

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Two separate bioanalytical methods were developed, validated and applied to determine agricultural exposure to organochlorine and organophosphorus pesticides using different biological matrices as reference sources. The method that was validated for the quantification of the organochlorine compounds was used to simultaneously determine β-endosulfan [6, 7, 8, 9, 10, 10- hexacloro-1, 5, 5a, 6, 9, 9a- hexahydro- 6, 9-methano-2, 4, 3-benzodioxathiepin-3- oxide] and one of its main metabolites, endosulfan sulfate, in human serum. In a second bioanalytical method, urinary dialkylphosphate metabolite

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9

Santiago, Neto Antonio Inacio. "Exploração da degradação de sulfito assistida por ultra-som para a determinação indireta de açúcares redutores empregando análise por injeção seqüencial." Programa de Pós-Graduação em Química da UFBA, 2006. http://www.repositorio.ufba.br/ri/handle/ri/9991.

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Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-04-23T11:00:55Z No. of bitstreams: 1 Santiago Neto.pdf: 777271 bytes, checksum: 7b5d519ad6bf5809028c74aefc018b57 (MD5)<br>Made available in DSpace on 2013-04-23T11:00:55Z (GMT). No. of bitstreams: 1 Santiago Neto.pdf: 777271 bytes, checksum: 7b5d519ad6bf5809028c74aefc018b57 (MD5) Previous issue date: 2006<br>Métodos para a determinação de açúcares redutores totais em alimentos explorando a técnica de análise em fluxo têm sido reportados na literatura. Na estrutura dos açúcares redutores há um grupo carbonila capaz de formar adu

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10

Popolim, Welliton Donizeti. "Análise de sulfitos em sucos de frutas e estimativa de seu consumo por escolares." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/89/89131/tde-12062009-185114/.

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No Brasil os dados sobre a utilização dos sulfitos pela indústria de alimentos e pesquisas sobre o seu consumo são escassos. Sendo assim, o objetivo desta pesquisa foi avaliar o nível de sulfitos em sucos de frutas e estimar seu consumo por escolares de 5ª. a 8ª. séries de escolas públicas, do ensino fundamental, do município de São Caetano do Sul-SP, Brasil. Foi aplicado questionário de freqüência de consumo de alimentos (QFCA) em 313 escolares, sendo 56,9 % do sexo feminino e 43,1 % do sexo masculino, com média de idade de 14,7 anos. Os alimentos sulfitados mais consumidos foram os néctares

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11

Tchoumou, Martin. "Hydrometallurgie du cuivre en milieu chlorure : attaques de minerais dosages polarographiques des solutions resultant de l'attaque et depot cathodique du cuivre." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13154.

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Etude dans le cadre de l'extraction de cu des minerais de type chalcopyrite. Lors de l'attaque des minerais de type chalcopyrite par des solutions de cu(ii) en milieu fortement chlorure, les metaux presents dans le minerai sous forme de sulfures passent en solution soit partiellement soit en totalite, et s elementaire precipite. Mise au point du dosage polarographique des ions cu, pb, zn et fe dissous. L'electrolyse de solutions a teneur elevee en cu(i) et contenant pb(ii), zn(ii) ou fe(ii) a mis en evidence un phenomene de codeposition de pb avec cu lorsqu'on opere a des densites de courant e

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12

Zezulová, Anežka. "Vliv oxidu barnatého na tvorbu a vlastnosti portlandského slínku." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217077.

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Portland clinker is thanks to its large-scale production a continuously studied topic. Clinker, or Portland cement, is used for construction purposes, or for insulation and special applications. One of these special applications could be shielding of different types of radiation by making use of the content of barium ions. The present master’s thesis examines the influence of barium oxide on the formation and properties of Portland clinker, which could be, by incorporation of barium ions into the system, used as a binder for buildings resistant to various types of radiation. Barium sulfate and

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13

Chen, Meichin, and 陳美津. "Determination of Sulfite in Hair Waving Products Using Oxygen-Incorporated Gold-Modified Screen-Printed Electrodes." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/27479350355089918854.

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碩士<br>靜宜大學<br>化粧品科學系<br>101<br>An electrodeposition oxygen-incorporated gold-modified screen-printed carbon electrode (AuOSPE) was fabricated to determine the sulfite content in hair waving products. The AuOSPE showed an electrocatalytic current for sulfite at +0.4 V (vs. Ag/AgCl). Compared with a gold screen-printed electrode (AuSPE), the AuOSPE showed higher electrocatalytic current. The increase in the electrocatalytic current was ascribed to the increase of the oxygen incorporated with gold atom on AuOSPE. The AuOSPE coupled with a flow injection analysis (FIA) system showed excellent oxid

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14

LIN, HSIANG-YIN, and 林香吟. "Turbidimetric determination of sulfate in seawater." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5y9d8r.

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碩士<br>國立高雄科技大學<br>海洋環境工程系<br>107<br>About 88% sulfur oxide (SOX) in the atmosphere releases from industry and power plants through burning fossil fuel. At present, domestic power plants have used seawater for desulfurization of flue gas, this method will indeed increase the amount of sulfate in seawater. Historically, the gravimetric measure is the main method for determining sulfate in seawater. Due to time consumption, this study hopes to establish a method for rapid determination of sulfate concentration in seawater, thereby assessing how much of sulfur oxides are absorbed by seawater. Turb

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15

陳秀珍. "Determination of selenium and sulfide by flow injection analysis." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/54495923160848502058.

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16

Wang, Pei-Yun, and 王姵勻. "Simultaneous determination of indoxyl sulfate and para-cresol sulfate in serum of hemodialysis patients by capillary electrophoresis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/hce6a3.

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碩士<br>高雄醫學大學<br>藥學系碩士班<br>103<br>An efficient, simple, sensitive and rapid on-line sample concentration technique－field-amplified sample stacking-sweeping-micellar electrokinetic chromatography (FASS-sweeping-MEKC) was developed for simultaneous determination of para-cresol sulfate (PCS) and 3-indoxyl sulfate (3-INS) in human serum. PCS and 3-INS are the two important representatives of endogenous “protein-bound uremic toxins” and would accumulate in chronic renal failure patients with impaired kidney functions, leading to various adverse impacts and toxicities on human body. Therefore, detect

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17

"Spectrophotometric determination of sulphide and fluoride." Chinese University of Hong Kong, 1994. http://library.cuhk.edu.hk/record=b5887274.

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Ho Chak Ming.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1994.<br>Includes bibliographical references (leaves 122-126).<br>Acknowledgment --- p.i<br>Table of contents --- p.ii<br>List of figures --- p.iv<br>List of tables --- p.v<br>Abstract --- p.ix<br>Chapter Part I --- Determination of sulphide<br>General introduction --- p.1<br>Spectrophotometric determination of sulphide --- p.5<br>Chapter 1. --- Introduction --- p.5<br>Chapter A. --- Review of the reported methods for the determination of sulphide --- p.5<br>Chapter B. --- General description of the proposed method --

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18

Lin, Ying-Chun, and 林盈君. "Determination of ammonia in water by the Indophenol blue method catalyzed by manganese sulfate." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/44277107017315231118.

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碩士<br>國立臺灣大學<br>海洋研究所<br>95<br>The feasibility of using MnSO4 as a catalyst for the determination of ammonia in natural water based on the Indophenol blue reaction is studied. The salt interference on pH and color formation rate, the temperature effect on the kinetics of the formation reaction are examined in details. It was found that, using the MnSO4 catalyst, the reaction rate and the final molar extinction coefficient of the Indophenol blue complex are not affected by temperature but by the final pH, which is in oppose to the traditional Indophenol blue method using nitroprusside as a cata

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19

Yang, Zong-Yi, and 楊宗逸. "Determination of Dimethyl Sulfide and Dimethyl Disulfide by Solid Phase Microextraction Incorporated with Portable Gas Chromatograph." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/03914624238795138463.

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20

HONG, CHONG-LING, and 洪崇嶺. "Studies of the inhibiting effects of chromate for carbon steel in sulfate aqueous solution and the determination of electrochemical corrosion rate." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/10938644426354684265.

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21

Wang, Xiao Ying. "Liquid chromatographic determination of a combined form of L-ascorbic acid (L-Ascorbate 2-sulfate) in fish feeds and fish tissues by solvolytic release of L-ascorbic acid." 1988. http://hdl.handle.net/2097/22538.

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22

Li, Yi-Jen, and 李亦臻. "Isolation and Identification of alpha-CEHC Sulfate in Rat Urine and an Improved Method for the Determination of Conjugated alpha-CEHC and Effects of PPAR alpha Activation on the Metabolism of Vitamin E to alpha-CEHC." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/33250901992473895762.

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博士<br>國立臺灣大學<br>微生物與生化學研究所<br>97<br>2,5,7,8-tetramethyl-2-(2’-carboxyethyl)-6-hydroxychroman (alpha-CEHC), the metabolite of alpha-tocopherol (alpha-TOH) with a shortened side chain but an intact hydroxychroman structure, has been identified in the urine. Pathway of the metabolism involves omega-hydroxylation of phytyl side chain and the following beta-oxidation. omega-Hydroxylation is known to be catalyzed by cytochrome P450 enzymes (CYPs), of which CYP3A and CYP4F is the most likely candidates. The enzymes which are responsible for the omega-oxidation (CYP4A1) and peroxisomal beta-oxdiation

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