Log in

Relevant bibliographies by topics / Potassium Bromate

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Potassium Bromate'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Potassium Bromate.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Potassium Bromate"

1

Falahul Alam, Riesma Azhar, Hilda Aprilia Wisnuwardhani, and Rusnadi Rusnadi. "Optimasi Pereaksi Warna Carik Uji untuk Analisis Kualitatif Kalium Bromat pada Makanan." Jurnal Ilmiah Farmasi Farmasyifa 1, no. 1 (October 30, 2017): 62–68. http://dx.doi.org/10.29313/jiff.v1i1.3077.

Full text

Abstract:

ABSTRAK Bahan tambahan pangan biasanya ditambahkan untuk meningkatkan mutu makanan. Namun, sering pula dijumpai penambahan zat yang dilarang penggunaannya dalam makanan. Salah satunya adalah kalium bromat. Untuk itu diperlukan suatu pereaksi untuk pendeteksian kalium bromat yang dapat dijadikan carik uji agar pendeteksian kalium bromat menjadi lebih mudah. Dalam penelitian ini dilakukan optimasi volume nanopartikel Ag dan konsentrasi acid red 14 sebagai pereaksi untuk carik uji kalium bromat. Acid red 14 ini akan teroksidasi menjadi tidak berwarna dengan adanya kalium bromat. Dari hasil penelitian ini, setiap 25 mL pereaksi terdiri dari 10 mL nanopartikel Ag; 0,002 mM acid red 14; dan 1 mL H2SO4 0,2 M.Kata kunci: Kalium bromat, nanopartikel Ag, acid red 14.ABSTRACT Food additives are usually added to improve food quality. But banned substance are often found e.g potassium bromate. Therefore we need a reagent to analyze the presence of potassium bromate and the reagent will be used to make a strip test for practical uses in detection potassium bromate. In this study, optimization of Ag nanoparticles volume and acid red 14 concentration has been done. Acid Red 14 was oxidized to colorless in the presence of potassium bromate. Result showed that each 25 mL reagent consist of 10 mL Ag nanopaticles; 0,002 mM acid red 14; and 1 mL 0,2 M H2SO4.Key words: Potassium bromate, Ag nanopaticles, acid red 14.

APA, Harvard, Vancouver, ISO, and other styles

2

Dong, Wen Yi, Zi Jun Dong, Feng Ouyang, and Yang Dong. "Potassium Permanganate/ Ozone Combined Oxidation for Minimizing Bromate in Drinking Water." Advanced Materials Research 113-116 (June 2010): 1490–95. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.1490.

Full text

Abstract:

In this study, experiments were conducted to make a comparison in bromate formation between KMnO4/O3 combined oxidation and single ozonation. The effect of KMnO4 dosage, temperature, pH and NOM on bromate formation during KMnO4/O3 combined oxidation was investigated. Result shows that, bromate formation is 26% lower during the process of KMnO4/O3 combined oxidation. The optimal KMnO4 dosage is suggested to be 1mg/L considering balance between bromate inhibition and the residual manganese concentration. When KMnO4 dosage was 1.0mg/L, initial bromide concentration was lower than 80 μg/L, and temperature was below 25°C, combined oxidation can make the formation of bromate under the maximum contaminant level of 10 μg/L. Finally, the probable mechanism of the better behavior of KMnO4/O3 combined oxidation was discussed.

APA, Harvard, Vancouver, ISO, and other styles

3

Mohammed, M. J., M. S. Mahdi, A. H. Jameel, and K. M. Thalj. "THE ROLE OF LACTOBACILLUS CASEI AND LACTOBACILLUS ACIDOPHILLUS TO DECREASE THE BIOLOGICAL EFFECTS OF POTASSIUM BROMATE IN RATS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, no. 1 (February 24, 2021): 70–78. http://dx.doi.org/10.36103/ijas.v52i1.1237.

Full text

Abstract:

This study was conducted to investigate the ameliorative effect of lactic acid bacteria Lactobacillus casei and Lactobacillus acidophilus against Potassium bromate (25, 50) mg / kg toxicity by some physiological indicators in 35 of female rats after 21 days. The animals were divided into 7 groups within each group 5 animals weighted 140 – 155 g. The results showed a significant decrease (P<0.05) in value of Red blood cells (RBC), hemoglobin (Hb), White blood cells (WBC), Lymphocyte (LYM) and Platelets (PLT), While increasing the values of Granules (GRN). Also found that the addition of Potassium bromate Potassium bromate led to increase in cholesterol, triglyceride (TG), Low Density Lipoprotein (LDL) and blood glucose, while decreased the values of High Density Lipoprotein (HDL) for rats groups with increasing the concentration of Potassium bromate compared with control group. The addition of two types of lactic acid bacteria L. casei and L. acidophilus with Potassium bromate showed a positive effect to reducing the negative effect of Potassium bromate on blood and lipid profile parameters compared with the control group and Potassium bromate group. It is concluded that the lactic acid bacteria has protective effects and reduces the effects that Potassium bromate.

APA, Harvard, Vancouver, ISO, and other styles

4

Buhse, Thomas, and Wolfram Thiemann. "Chiral Intermediates and the Oscillatory Effect of Circular Dichroism in the Belousov – Zhabotinskii Type Reaction of L-Ascorbic Acid." Zeitschrift für Naturforschung B 46, no. 10 (October 1, 1991): 1406–14. http://dx.doi.org/10.1515/znb-1991-1019.

Full text

Abstract:

Investigating the Belousov—Zhabotinskii (BZ) type reaction of an acidic L-ascorbic acid (AA) / potassium bromate / cerous sulfate system, an oscillatory effect of circular dichroism is detectable at λ = 300 nm. HPLC analysis of the oscillatory mixture and spectroscopic experiments indicate that this effect is caused by 3,4,5-trihydroxy-2-oxo-L-valeraldehyde (TVA) — a C 5 oxidation fragment of AA. Because of the bromide ion production occurring before the metal catalyst addition the AA system shows no preoscillatory phase and a rather short entire length of oscillation up to a maximum of 20 min. Since AA is not brominated but oxidized by bromine which is formed by the Landolt typ “clock reaction” of AA with acidic bromate, partially bromine-hydrolysis-controlled (BHC) oscillations are discussed for the overall mechanism of this BZ system.

APA, Harvard, Vancouver, ISO, and other styles

5

Osborne, Brian G., Kenneth H. Willis, and Gillian M. Barrett. "Survival of bromate and bromide in bread baked from white flour containing potassium bromate." Journal of the Science of Food and Agriculture 42, no. 3 (1988): 255–60. http://dx.doi.org/10.1002/jsfa.2740420308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Starek, Andrzej. "Potassium bromate – inhalable fraction. Documentation of proposed values of occupational exposure limits (OELs)." Podstawy i Metody Oceny Środowiska Pracy 34, no. 2(96) (June 20, 2018): 35–59. http://dx.doi.org/10.5604/01.3001.0012.0753.

Full text

Abstract:

Potassium bromate (V), (KBrO3) exists as white crystals, crystalline powder or granules. It is highly soluble in water, tasteless and odourless. Potassium bromate is a strong oxidizing agent. In the past it has been used as food additive in flour milling, as an ingredient in fish-paste in Japan, in cheese making, in beer malting, as a component of cold hair wave liquid and an oxidizing compound. Moreover, bromate is formed as a by-product of water disinfection by ozonation and is frequently detected in tap and bottled water. In fact bromate is one of the most prevalent disinfection by-product of surface water. Occupational exposure to potassium bromate occurs mainly in production plants during packaging processes. In Poland, about 1 160 persons were exposed to this compound in 2016. Bromate caused many acute poisonings by accidental ingestion, mainly among children, and more often ingested for tentative suicide by young women, especially hairdressers. In the acute phase of poisoning, gastrointestinal disturbances, irreversible hearing loss, and acute renal failure were observed. Acute renal failure was associated with hemolytic uremic syndrome. There are no data on chronic intoxication of humans by potassium bromate and epidemiological studies on this subject. On the basis of the value of median lethal dose (LD50) per os in rat, potassium bromate has been classified as a compound belonging to the category „Toxic”. Major toxic signs and symptoms in animals after a single intragastric administration of potassium bromate were tachypnea, hypothermia, diarrhea, lacrimation, suppression of locomotor movement, ataxic gait, and animals lying in a prone position. At autopsy the major findings were strong hyperemia of glandular stomach mucosa and congestion of lungs. Microscopically, necrosis and degenerative changes of the proximal tubular epithelium and hearing cells of internal ear were found. It was stated that the compound is not irritating, corrosive or sensitizing. In subchronic and chronic exposure of rodents, potassium bromate led to liver and kidney dysfunction and tubular epithelial damage. Potassium bromate had mutagenic and clastogenic effects. It induced point mutations, structural chromosome aberrations, micronuclei in polychromatic erythrocytes in male mice, DNA oxidative damage by modification of deoxyguanosine to 8-hydroxydeoxyguanosine, and DNA double-strand breakage. Potassium bromate induced neoplasms in rodents and exerted promotion effect in comparison with well-known carcinogens. Besides from preneoplastic changes, expressed by high incidences of renal cell tumors and dysplastic foci, bromate induced solid neoplasms, such as adenomas and adenocarcinomas in a rat kidney and thyroid, and mesotheliomas of peritoneum and tunica vaginalis testis. The European Union classified potassium bromate as a substance that can cause cancer (Group 1.B), whereas IARC classified it as a presumably carcinogenic agent for human (Group 2.B). In principle, effects of bromate on reproduction and ontogenetic development of offspring were not observed. Animal studies suggest that a kidney is a critical organ in the exposure to potassium bromate. The results of subchronic exposure of male rats to potassium bromate administered with drinking water were used to calculate the value of MAC-NDS. The critical effects in kidney were: an increase of organ weight and dose-dependent histopathological alterations defined as epithelium urinary tract hypertrophy. The NOAEL value is 1.5 mg/kg b.w./day. For the calculation of the maximum allowable concentration (MAC) value, 5 uncertainty factors with total value of 24 were used. Based on this estimation it is proposed to accept the MAC-TWA value for potassium bromate at 0.44 mg/m3. The risks of kidney and thyroid cancer in condition of occupational exposure are 2.2 · 10-3 and 0.6 · 10-3, respectively. There is no reason to determine the value of short-term exposure limit (STEL) and the biological exposure index (BEI). „Carc.1.B” notation (carcinogenic substance) was proposed

APA, Harvard, Vancouver, ISO, and other styles

7

Oseni, Oatunde Abass, Sulaiman Adeoye Olagboye, Olusegun Timothy Adams, and Bamaiyi Sunday Maikasuwa. "THE PROTECTIVE EFFECTS OF AQUEOUS EXTRACT OF AFRICAN NUTMEG (Myristica fragrans) IN BROMATE-INDUCED SPLEEN AND CARDIAC TISSUE TOXICITIES USING MALE WISTAR ALBINO RATS." Journal of Drug Delivery and Therapeutics 8, no. 5 (September 10, 2018): 257–62. http://dx.doi.org/10.22270/jddt.v8i5.1831.

Full text

Abstract:

This study was aimed at investigating the toxic effects of potassium bromate on the spleen and heart of Wistar albino rat and to evaluate the protective effects of aqueous extract of African nutmeg (Myristica fragrans) against potassium bromate induced toxicity in the two organs. Twenty-four (24) male wistar albino rats weighing between 180g and 200g were divided into four groups of six animals each. Group I animals were served with rat feed and water as the control group, group II were administered daily with 30mg/kg bw potassium bromate while groups III and IV animals were administered with 0.5mL of 20% and 40% aqueous extracts of nutmeg seed in addition with 30mg/kg body weight potassium bromate respectively for two weeks. The animals were kept at optimum temperature within a 12 hours light/dark cycle while the experiment lasted. Enzyme biomarkers such as Aspartate Transaminase, Alanine Transaminase, Alkaline Phosphatase; antioxidant enzymes such as, Superoxide dismutase, Catalase; reduced Glutathione; some lipid profiles like Cholesterol, Triglyceride and malondialdehyde were measured in the spleen and heart homogenates of the animals in all the groups. Results of this study showed that potassium bromate exerted significant (P < 0.05) toxic effects on the spleen and heart homogenates while the administration of aqueous extracts of African nutmeg seed caused a marked reversal in the toxicity in a dose dependent manner. However, the results of this study showed that aqueous extract of the seed of African nutmeg is a potential antioxidant against potassium bromate toxicity in the two organs. Keywords: Toxicity, Potassium bromate, Myristica fragrans, Cardiac tissue, Antioxidant

APA, Harvard, Vancouver, ISO, and other styles

8

Mohanty, S. R., and D. Patnaik. "Effects of admixtures of potassium bromide on the thermal decomposition of potassium bromate." Journal of Thermal Analysis 35, no. 7 (November 1989): 2153–59. http://dx.doi.org/10.1007/bf01911880.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Haleem, Azhar M. "Cytogenetic Effects of Potassium Bromate KBrO3 Associated with Iraqi Baking Industry." Indian Journal of Applied Research 4, no. 6 (October 1, 2011): 1–2. http://dx.doi.org/10.15373/2249555x/june2014/190.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Ekop, A. S., I. B. Obot, and E. N. Ikpatt. "Anti-Nutritional Factors and Potassium Bromate Content in Bread and Flour Samples in Uyo Metropolis, Nigeria." E-Journal of Chemistry 5, no. 4 (2008): 736–41. http://dx.doi.org/10.1155/2008/530596.

Full text

Abstract:

The aim of the study is to evaluate the anti-nutritional composition factors and potassium bromate content of some selected bread and flour samples in Uyo Metropolis. The result of the analysis shows that, though the concentration of phytic acid and tannins was high in both the bread and flour samples their concentrations did not exceed lethal doses. The potassium bromate content was minimal in all the bread and flour samples and within safe limits of residual bromide found in flour as specified by the US Food and Drug Administration. The concentrations of the anti-nutritional factors in the bread and flour samples were partially different from each other when subjected to the studentst-test statistics.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Potassium Bromate"

1

Parsons, Jason Luke. "The mechanism of genotoxicity of potassium bromate." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364521.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Crosby, Lynn Marie. "Studies on Mechanisms of Potassium Bromate-Induced Mesothelial Carcinogenesis in the Male F344 Rat." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000509-143301.

Full text

Abstract:

Potassium bromate (KBrO3) is a drinking water disinfection by-product and may represent a health hazard if found to be carcinogenic for humans, as was determined in rats (DeAngelo et al., 1998; Hayashi et al., 1986; Kurokawa, 1985; Kurokawa et al., 1985; Kurokawa et al., 1986a; Kurokawa et al., 1982; Kurokawa et al., 1983a; Kurokawa et al., 1987a; Kurokawa et al., 1983b; Kurokawa et al., 1986b; Ohno et al., 1982; Onodera et al., 1985). The purpose of this research was to determine the mechanism of toxicity. The peritoneal mesothelium is a (rat) target organ of potassium bromate carcinogenicity, but has not been studied due to the inherent difficulties of working with this one cell layer-thick tissue. Data from a two-year bioassay were used to more precisely map the location of origin, revealing that these tumors in the male F344 rat originate on the mesorchium of the tunica vaginalis testis, the mesosplenium, or at a point in between. An in vitro cell culture system was developed to study the mechanism of toxicity. It was demonstrated that KBrO3 caused cell cycle arrest and markedly increased the number of apoptotic cells. KBrO3 is a powerful oxidant and glutathione (GSH) is the major cellular antioxidant. Therefore, GSH-related responses were studied revealing mesothelial cells contained substantially less GSH than a human hepatocellular carcinoma cell line (Hep-G2). Studies employing GSH ester or N-acetyl cysteine (a GSH precursor) pre-treatment demonstrated abatement of toxicity in mesothelial, but not Hep-G2, cells. Experiments carried out to determine the chemical or enzymatic nature of the reaction between GSH and KBrO3 revealed differences between the reaction kinetics of the unbuffered and buffered chemical and cell-free/cell lysate reactions, probably due to reaction pH. Both chemical and cellular reactions exhibited a similar first step reaction between GSH and KBrO3; thus, enzyme participation is probably not required. Experiments using diethylmaleate, which depletes GSH by a reaction involving KBrO3, showed that GSH depletion greatly enhanced KBrO3 toxicity, indicating GSH glutathione S-transferase, buthionine sulfoximine (which prevents synthesis of GSH) and was protective. This does not support the hypothesis that the reaction of KBrO3 and GSH itself produces a radical/reactive species that oxidatively damages lipids, proteins and DNA. Rather, depletion of GSH likely precedes oxidative damage. Gene expression studies demonstrated that peritoneal mesothelial cells displayed expression changes in a discrete set of genes, including oxidative stress-responsive genes, after treatment with KBrO3 for four or 12 hours. Mesothelial cells severely damaged by five days KBrO3 treatment recovered from complete cell cycle arrest after four weeks and exhibited explosive growth, focus formation and altered morphology. The redox imbalance created by GSH depletion appears to mediate increased expression of known oxidative stress responsive genes (e.g., HO-1,GADD45, GADD153, QR), activation of transcription factors (AP-1 and NFkB) and down-regulation of cell cycle initiating cyclins (and up-regulation of the CDK inhibitor p21waf1/cip1) in KBrO3-mediated toxicity. These alterations may permit cell survival, as observed after severe toxicity, and may be accompanied by transforming mutations or clastogenic changes. Taken together, these data suggest that mesothelial cells represent a population susceptible to KBrO3-mediated toxicity in vitro, and suggest that tissue susceptibility in vivo plays a role in the nascence of mesotheliomas in the male F344 rat.

APA, Harvard, Vancouver, ISO, and other styles

3

Crosby, Lynn M. "Studies on mechanisms of potassium bromate-induced mesothelial carcinogenesis in the male F344 rat." Raleigh, NC : North Carolina State University, 2000. http://www.lib.ncsu.edu/etd/public/etd-5032149410021291/etd.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Hayta, Mehmet. "Thermal transitions in wheat gluten." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299298.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Vignaud, Caroline. "Etude de systèmes d'oxydoréduction susceptibles de contribuer à la consommation de composés thiols au cours du pétrissage des pâtes de farine de blé." Paris 11, 2002. http://www.theses.fr/2002PA112238.

Full text

Abstract:

Au cours du pétrissage, la consommation des thiols de bas poids moléculaire (BPM) affecte la structure du réseau de gluten, en raison de la participation de ces composés aux réactions d'échanges SH / SS avec les protéines. En panification, récemment, des enzymes fongiques ont été proposées comme alternative plus naturelle à l'emploi des améliorants chimiques (KBrO3, acide ascorbique) pour oxyder ces composés thiols BPM. Dans ce cadre, la sulfhydryle oxydase d'Aspergillus niger a été étudiée et son action a été comparée à celle du KBrO3 et de la glutathion (GSH) déshydrogénase de blé (GSH-DHase). Dans un 1er temps, le protocole de purification de la sax d'A. Niger mis au point a permis d'éliminer la catalase, contaminant majeur de l'échantillon. La caractérisation cinétique de la SOX a été menée. Une 2e partie a été consacrée à la mise au point de méthodes de dosage des formes réduite et oxydée (GSSG, CSSC et GSSC) du glutathion et de la cystéine. Ainsi, par CLHP couplée à un détecteur coulométrique ou UV, les GSH, CSH, GSSG, GSSC et CSSC ont pu être séparés et quantifiés. Les 3 disulfures ont été également analysés par gel filtration couplée à une détection UV. Une comparaison de la formation des disulfures par 3 différents systèmes oxydants, SOX, GSH-Dhase et KBrO3, a ensuite été réalisée à partir de mélanges de GSH et CSH. En dernier lieu, des associations enzymatiques en milieux modèles ont été examinées. Le mélange de SOX et de GSH-DHase conduit à une compétition pour la consommation du GSH. Parallèlement, l'association de SOX et de peroxydase de germe de blé (POD) a révélé que la SOX est capable d'activer la POD, en générant l'H2O2. Nous pouvons donc supposer que, dans la pâte, l'ajout de SOX peut influencer les réactions d'oxydoréduction, et par conséquent serait susceptible de modifier les propriétés de la pâte boulangère
During wheat flour dough mixing, low molecular weight (LMW) thiols consumption is known to influence the gluten network structure since these compounds can participate to exchange reactions SH / SS with proteins. In breadmaking, recently, fungal enzymes are proposed as "the natural alternative" to the use of chemical improving agents (KbrO3 ascorbic acid AA) to oxidise LMW thiols. In this respect, sulphydryl oxidase (SOX) from Aspergillus niger was studied and its action was compared to those of KbrO3 and wheat glutathione deshydrogenase (GSH-DHase). Firstly, the developed purification procedure of A. Niger SOX allowed to eliminate the catalase, the main contaminating activity present in the enzymatic sample. Kinetic studies have shown that SOX oxidised preferentially glutathione (GSH) and its activity was enhanced by cysteine (CSH). The second part of this work was to develop methods to quantify the oxidised and reduced forms of GSH and CSH. Thus, HPLC equipped with a coulometric or UV detector allowed the separation and simultaneous assay of GSH, CSH, GSSG, GSSC and CSSC. The 3 disulphides were also analysed by gel filtration with an UV detection. The comparison of the disulphide formation by the 3 different oxidising systems from mixtures of GSH and CSH was then investigated. While KbrO3 produces predominantly CSSC, SOX and GSH-DHase generated GSSG and GSSC, respectively. Lastly, enzymatic associations in model systems have been examined. When SOX is in the presence of GSH-DHase, both enzymes competed for the GSH consumption. The association of SOX and wheat germ peroxidase (POD) revealed that SOX was able to activate POD by producing H2O2. Thus, in dough, the use of SOX may influence oxidoreducing systems and consequently modify flour dough properties

APA, Harvard, Vancouver, ISO, and other styles

6

LOUARME, LOIC. "Sujet : etude du mecanisme d'action du bromate de potassium en panification en vue de le remplacer par une oxydoreductase." Paris 11, 2001. http://www.theses.fr/2001PA112093.

Full text

Abstract:

Le bromate de potassium, additif a action lente, qui ameliore le volume des pains, la texture de la mie et augmente la tolerance au procede de panification, est aujourd'hui declare cancerigene. L'objectif de notre travail est d'etudier et de comprendre son mecanisme d'action afin de le remplacer par une ou plusieurs oxydoreductases. Une premiere partie de notre travail a consiste a determiner, en solutions aqueuses, les reducteurs presents dans la farine reagissant avec le bromate. Seuls les composes portant une ou plusieurs fonctions thiols sont oxydes par le bromate. La reaction avec la cysteine ou le glutathion a ete etudiee en detail (stchiometrie, produits, effet de differents parametres physico-chimiques). Cette etude a abouti a la mise en place d'un modele mathematique. Dans un second temps, nous avons etudie la reaction du bromate sur les thiols hydrosolubles en presence de farine (suspension de farine et pate). La vitesse de la reaction dans la suspension et dans la pate est ralentie par rapport a celle en solution aqueuse. En milieu pateux, une part plus importante des produits de l'oxydation de la cysteine est de degre d'oxydation superieur a ceux obtenus avec le glutathion. Par ailleurs, le bromate de potassium agit des le debut du petrissage mais, plus lentement, durant la phase de repos. Les effets rheologiques obtenus au cours du petrissage de pates realisees a l'aide du petrin experimental bioreacteur et au cours de la panification peuvent etre expliques par l'oxydation des thiols endogenes a la farine. La comparaison des vitesses d'action de differents oxydants (iodate, bromate, persulfate et chlorate de potassium) sur l'oxydation des thiols et sur leur effet rheologique confirme cette hypothese. Deux substituts enzymatiques ont ete proposes pour remplacer le bromate. L'un d'eux a fait l'objet d'une etude biochimique et rheologique similaire a celle du bromate (partie confidentielle, dont la publication est differee au 28 juin 2003).

APA, Harvard, Vancouver, ISO, and other styles

7

Watanabe, Edson. "Effect of potassium bromate and protein disulphide isomerase (E.C. 5.4.3.1.) on the rheology of wheat flour dough assessed by both empirical and oscillatory testing." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315415.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Charles, Laurence. "Origine de la stabilite et de la population d'agglomerats de sel mono et multicationises du bromate de potassium : une contribution a la comprehension de l'ionisation-desorption par electrospray." Paris 6, 1999. http://www.theses.fr/1999PA066104.

Full text

Abstract:

Des agglomerats cationises de bromate de potassium ont ete etudies en spectrometrie de masse apres ionisation electrospray afin d'essayer de mieux comprendre les processus d'ionisation en solution, les phenomenes de desorption des ions en phase gazeuse a partir des gouttelettes chargees ainsi que leur stabilisation apres desolvatation. Les differents parametres qui, en phase liquide, peuvent conditionner la formation des agglomerats de sel cationises ont ete inventories : la concentration en sel, la nature et la teneur du solvant organique en solution, ainsi que le ph. Un modele issu de l'etat des connaissances de la gouttelette chargee a pu etre etabli : la distribution des etats de charge des agglomerats de sel cationises est dependante de la mobilite des ions dans la gouttelette. Les fragmentations induites par collision des agglomerats de sel cationises dans l'interface du spectrometre de masse ont permis de proposer un modele energetique pour rendre compte de la stabilite de ces ions en phase gazeuse. En fonction de la nature et de la teneur en solvant organique dans la solution, la desolvatation des ions dans l'interface est soumise a deux processus d'effets opposes. L'un releve des affinites cationiques en phase gazeuse, defavorables aux etats de charge eleves pour un solvant donne, l'autre est lie au processus de desorption qui peut leur etre favorable au travers de la solvatation. Il apparait egalement une stabilite particuliere pour certains nombres d'entites constitutives de l'agglomerat qui peut s'expliquer au travers des nombres magiques. L'etude des decompositions metastables de ces agglomerats de sel cationises a permis de mieux comprendre la stabilite de ce type d'ions en phase gazeuse. Il a ainsi ete demontre que differentes formes isomeres des agglomerats pouvaient coexister en solution.

APA, Harvard, Vancouver, ISO, and other styles

9

Alvarenga, Sandra Torres. "Síntese de acetatos de glicerina utilizando sais de bismuto." reponame:Repositório Institucional da UFBA, 2011. http://www.repositorio.ufba.br/ri/handle/ri/10931.

Full text

Abstract:

118 f.
Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2013-04-11T17:50:31Z No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f1458daa95968 (MD5)
Approved for entry into archive by Ana Hilda Fonseca(anahilda@ufba.br) on 2013-05-14T17:22:34Z (GMT) No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f1458daa95968 (MD5)
Made available in DSpace on 2013-05-14T17:22:34Z (GMT). No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f1458daa95968 (MD5) Previous issue date: 2011
CAPES
Devido aos inúmeros incentivos governamentais que impulsionam a produção do Biodiesel no mundo, tal combustível está sendo produzido largamente, e um fator preocupante frente a esse crescimento é o destino do glicerol excedente, já que seu uso é condicionado ao seu grau de pureza, que deve estar usualmente acima de 95%. No caso do glicerol bruto, resultante do processo de transesterificação do biodiesel, são necessários processos complexos e onerosos para que essa matéria-prima alcance as exigências em grau de pureza necessária para seu emprego. Além disso, os mercados tradicionais que o consomem (indústria de cosméticos, resinas, indústria farmacêutica, têxtil e alimentícia) têm uma capacidade limitada de absorção de quantidades maiores desse sub-produto. Sendo assim, esse trabalho tem como objetivo promover modificações estruturais na molécula do glicerol (comercial, alcalino e bruto), utilizando como agentes oxidantes os sais de bismuto (Zn(BiO3)2 e NaBiO3), NaClO e KBrO3/NaHSO3. As reações foram realizadas em ácido acético , ácido lático, acetona, água, com variação de tempo, temperatura, concentração dos reagentes e catalisadores. Essa metodologia sintética tem como finalidade gerar produtos com maior valor agregado tornando o glicerol um sub-produto mais reaproveitado e competitivo no mercado. Os melhores resultados na conversão do glicerol para os produtos mono, di e triacetilados foram alcançados utilizando 1mol% do catalisador NaBiO3 em diferentes concentrações de ácido acético glacial. Na ausência do catalisador a reação também ocorre, porém com tempo elevado. Em nenhum dos experimentos ocorreu à oxidação do glicerol. O modelo experimental realizado mostrou que é necessário excesso de ácido a fim de promover o equilíbrio na direção da conversão do glicerol e seletividade para os produtos mais valiosos comercialmente, o di e triacetilados.
Salvador

APA, Harvard, Vancouver, ISO, and other styles

10

Walton, Jeffrey Howard. "NMR on single crystals of potassium cyanogen bromide (a measurement of the orientational probability distribution function of the negatively charged cyanogen ion)." W&M ScholarWorks, 1989. https://scholarworks.wm.edu/etd/1539623787.

Full text

Abstract:

Single crystals of K(CN)$\sb{\rm x}$/(Br)$\sb{\rm 1-x}$ enriched in $\sp{15}$N have been studied by $\sp{15}$N NMR. Because of the anisotropic chemical shift, the NMR frequency spectrum of the orientational glass state reflects the distribution of cyanide orientations. By studying the spectrum at many orientations of each crystal, the orientational probability distribution function P($\Omega$) has been determined for x = 0.50 and for x = 0.20. The probability function is largest along the (100) directions, intermediate in the (110) directions, and nearly 0 along the (111) directions. The NMR determined P($\Omega$) is presented graphically and in terms of the Kubic Harmonic functions. The NMR results are in sharp contrast to molecular dynamics calculations but agree with neutron scattering data for x = 0.53.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Potassium Bromate"

1

Department, Great Britain Scottish Office Agriculture and Fisheries. The use of potassium bromate in malting and brewing. Edinburgh: The Department, 1993.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Great Britain. Department of Agriculture and Fisheries for Scotland. Proposals for Potassium Bromate (Prohibition as an Additive in Food) (Scotland) Regulations. [Edinburgh]: [The Department], 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ireland. Food Safety Advisory Committee. Potassium bromate in flour: Report to the Minister for Health and the Minister for Agriculture, Food and Forestry. Dublin: Stationery Office, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Noble, E. G. Solubilities of bromide salts of aluminum, cobalt, lead, manganese, potassium, and sodium when sparged with hydrogen bromide. Pgh. [i.e. Pittsburgh] Pa: U.S. Dept. of the Interior, Bureau of Mines, 1988.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Papadimitropoulos, Emmanuel A. Post consolidation behaviour of two crystalline materials, sodium chloride and potassium bromide. Ottawa: National Library of Canada, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Aguilar, Ramon Pacheco. The effect of potassium bromate on the gel-forming ability of Pacific whiting (Merluccius productus) surimi. 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Potassium Bromate"

1

Bährle-Rapp, Marina. "Potassium Bromate." In Springer Lexikon Kosmetik und Körperpflege, 442. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_8265.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Tono, T., Y. Ushisako, T. Morimitsu, and M. Takenaka. "Cochlear Implants in Deafened Patients due to Potassium Bromate Poisoning." In Cochlear Implant and Related Sciences Update, 315–17. Basel: KARGER, 1997. http://dx.doi.org/10.1159/000059029.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Diachenko, Gregory W., and Charles R. Warner. "Potassium Bromate in Bakery Products: Food Technology, Toxicological Concerns, and Analytical Methodology." In ACS Symposium Series, 218–27. Washington, DC: American Chemical Society, 2002. http://dx.doi.org/10.1021/bk-2002-0816.ch016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Gooch, Jan W. "Potassium Bromide." In Encyclopedic Dictionary of Polymers, 579. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Bast, Thomas, and Bernhard J. Steinhoff. "Anticonvulsant Agents: Potassium Bromide." In NeuroPsychopharmacotherapy, 1–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-56015-1_304-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Winkelmann, J. "Diffusion of carbon dioxide (1); water (2); potassium bromide (3)." In Gases in Gases, Liquids and their Mixtures, 2269. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_1759.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Abys, J. A., N. P. Knright, H. M. Gerdes, T. L. Hall, Jack M. Williams, J. Ackerman, and A. Wold. "Potassium Tetracyanoplatinate Bromide (2:1:0.3) Trihydrate, K2 [Pt(Cn)2 ] Br0.3 .3h2 O." In Inorganic Syntheses, 1–5. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132500.ch1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Miyamoto, H., and M. Salomon. "Potassium Bromate." In Alkali Metal Halates, Ammonium Iodate & Iodic Acid, 220–57. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-08-029210-6.50016-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

"Potassium bromide." In Encyclopedic Dictionary of Polymers, 777. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_9155.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Palik, Edward D. "Potassium Bromide (KBr)." In Handbook of Optical Constants of Solids, 989–1004. Elsevier, 1997. http://dx.doi.org/10.1016/b978-012544415-6.50090-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Potassium Bromate"

1

Ghosh, Priyanka, Gargi Maity, Snigdha Banerjee, and Sushanta Banerjee. "Abstract 2118: The food additive agent potassium bromate prevents growth and aggressive phenotypes by targeting multiple molecular signatures in breast cancer cells." In Proceedings: AACR Annual Meeting 2017; April 1-5, 2017; Washington, DC. American Association for Cancer Research, 2017. http://dx.doi.org/10.1158/1538-7445.am2017-2118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Klotz, Gregory L. "Mount for a large potassium bromide beamsplitter in a cryogenic space application." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by James B. Heaney and Lawrence G. Burriesci. SPIE, 1998. http://dx.doi.org/10.1117/12.323728.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Losch, Patricia A., James J. Lyons III, Armando Morrell, and James B. Heaney. "Maintaining flatness of a large-aperture potassium bromide beamsplitter through mounting and vibration." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by James B. Heaney and Lawrence G. Burriesci. SPIE, 1998. http://dx.doi.org/10.1117/12.323729.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Francoeur, Mathieu, Soumyadipta Basu, and Spencer J. Petersen. "Near-Field Thermal Radiation Between Mie Resonance-Based Metamaterials." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75009.

Full text

Abstract:

Near-field radiative heat transfer between dielectric-based metamaterials separated by a sub-wavelength vacuum gap is analyzed. Metamaterials made of silicon carbide spherical inclusions within a dielectric host medium of potassium bromide are considered. We show for the first time that surface polariton mediated near-field radiative heat transfer in both TE and TM polarizations may occur between dielectric-based structures. The results presented in this work also demonstrate that it is possible to engineer materials with designer radiative properties, which is crucial in many emerging energy conversion technologies.

APA, Harvard, Vancouver, ISO, and other styles

5

Helmy, Samy A., Judith K. Guy-Caffey, Leroy J. Detiveaux, Sabine C. Zeilinger, Mike D. Barry, and Cliff Aaron Corbell. "The Successful Development, Validation, and First Use of an Innovative Zinc-Free, High-Density Completion Fluid for Deepwater." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204095-ms.

Full text

Abstract:

Abstract The completion of wells using solids-laden fluids can impair the reservoir production and also damage the functioning of downhole completion tools, therefore completing wells with clear-brine fluids is the preferred alternative. Clear brines are typically halide or formate salt solutions in water, but they, too, have shortcomings. At lower temperatures or increased pressures, the salts in these fluids can crystallize causing potential well control concerns and/or costly operational disruptions. Completion of high-pressure wells, with densities above approximately 14.3 lb/gal for calcium bromide or 13.1 lb/gal for potassium formate, has historically required the use of brines containing zinc bromide or cesium formate to minimize formation damage, yet, in addition to their merits,both fluids have inherent liabilities. Zinc-based fluids, for example, are restricted and classified as priority pollutants due to their potential harmful effects on the environment, and the low pH(acidity) of zinc-based halides increases the potential for corrosion of metal components and risk to personnel safety. With cesium formate fluids, their limited production may restrict supply and lead to higher cost in high-volume deepwater applications. Moreover, when used as a packer fluid, literature (Javora 2003) suggests that formates may cause hydrogen-induced cracking (HIC), especially in the presence of carbon dioxide (CO2) that could lead to failure of production tubing. An offshore operator required a priority-pollutant-free completion fluid for a subsea development,whose produced fluids (oil and water) are combined and processed with that from several other fields at a shared production facility. Associated produced water separated from the crude is dischargedoverboard and must be free of priority pollutants; detection of any such pollutants would requireextensive processing or, in the worst case, result in shutting down production from all the fields and the facility. This paper describes the development and successful field applications of a novel family of completion fluids, created to address the deficits of conventional high-density clear brines. The new fluids extend the conditions for onset of crystallization to a higher density range and meet environmental concerns, as they are formulated with sustainably sourced materials. The novel high-density,non-zinc, solids-free completion fluid (HDNZ) meets the challenges and requirements of ultra-deepwater environments for fluid densities between 14.4 and 15.3 lb/gal. An overview of the extensive laboratory test data needed to develop the fluid and verify its viability as a completion brine and packer fluid is described. The paper outlines the design criteria and qualification testing performedto ensure that the technical challenges were addressed for this challenging deepwater project. The laboratory data include testing of pressurized crystallization temperatures (PCTs), stress corrosion cracking (SCC), elastomer compatibility, formation regain permeability, long-term stability, and compatibility with multiple fluid types (mud, control line, spacer, frac fluids, sour gases and chemical additives). The discussion on fluid usage will encompass details of the plant trial to validate the performance of the fluid and case history detailing the operational implementation in the first five ultra-deepwater well completions in the GOM. Additionally, engineering these fluids led to the development of a new method to measure brine crystallization temperature at elevated pressures, as there currently is no industry standard for such measurement in downhole conditions. The new method is accurate, repeatable, and executable in rig-site laboratories.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!