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Sodium sulfite

About: Sodium sulfite is a research topic. Over the lifetime, 2548 publications have been published within this topic receiving 18523 citations. The topic is also known as: Na2SO3 & Anhydrous sodium sulfite.


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Journal ArticleDOI
TL;DR: The results proved sulfite-formaldehyde as a promising pretreatment for the production of bioethanol as well as potential high value added by-products of silica nanoparticles and lignosulfonate.

18 citations

Patent
30 Oct 2001
TL;DR: In this paper, the use of a glycolic acid adduct of sodium sulfite as the reducing agent in the redox couple for polymerization of vinyl acetate polymer based emulsions for nonwoven binders which contain formaldehyde, primarily from the self-crosslinking co-monomer N-methylolacrylamide.
Abstract: The invention is the use of a glycolic acid adduct of sodium sulfite as the reducing agent in the redox couple for polymerization of vinyl acetate polymer based emulsions for nonwoven binders which contain formaldehyde, primarily from the self-crosslinking co-monomer N-methylolacrylamide.

18 citations

Journal ArticleDOI
TL;DR: In this article, a sea urchin-like microcrystal with cubic phase Cu 2 O was successfully prepared on the surface of hollow glass microspheres (HGMs) using sodium sulfite (Na 2 SO 3 ) as the reducing agent and sodium acetate-acetic acid (NaAc-HAc) as buffer solution in copper sulfate (CuSO 4 ) solution.

18 citations

Journal ArticleDOI
TL;DR: A chemically defined medium was developed which consisted of a mineral base chelated with EDTA, supplemented with glucose, sodium glutamate, and methionine, and buffered at pH 7.0 with 0.01 M. sodium succinate and TRIS used as additional buffers, which indicated that cellobiose, dextrin, fructose, glycerine, glycogen, sodium lactate, and soluble starch supported significantly heavier growth than did the standard medium minus glucose.
Abstract: Persistent bacteria were separated fromS. parasitica by means of the oligodynamic effect of a silver ring in a modification ofRaper's technique. Inoculation of fungal cultures was by means of mycelial macerate. Growth was measured by mycelial dry weight. A chemically defined medium (standard medium) was developed which consisted of a mineral base (chlorides of magnesium, manganese, zinc, calcium, and iron) chelated with EDTA, supplemented with glucose, sodium glutamate, and methionine, and buffered at pH 7.0 with 0.01 M. KH2PO4. Shaking culture methods supported increased growth rates and higher dry weight yields compared to stationary methods. Excellent growth occurred between 15 to 30°C. in the standard medium and between pH 4.0 and 8.0 in the standard medium plus 0.01 M. sodium succinate and 0.01 M. TRIS used as additional buffers. Significant phosphate toxicity was demonstrated at concentrations exceeding 0.05 M. Sodium succinate and TRIS, used as buffers at 0.01 M. each, were compatible withS. parasitica, whereas boric acid, sodium barbital, and sodium citrate inhibited growth under similar conditions. Substitution of other carbon sources for glucose in the standard medium (on an equal carbon basis where possible) indicated that cellobiose, dextrin, fructose, glycerine, glycogen, sodium lactate, and soluble starch supported significantly heavier growth than did the standard medium minus glucose; glycogen had a greater yield than did the standard medium minus glucose; glycogen had a greater yield than the standard medium. Arabinose, dulcitol, galactose, inulin, lactose, mannitol, mannose, raffinose, rhamnose, sorbitol, sucrose, and xylose neither stimulated nor inhibited growth; however, growth inhibition was produced by α-ketoglutaric acid, sodium citrate, and sodium succinate. When fatty acids and lipids were substituted for glucose (on an equal carbon basis where possible), only butter, lard, oleo, and palmitic acid supported heavier growth ofS. parasitica than the standard medium minus glucose. Stearicacid neither stimulated nor inhibited growth; acetic acid, butyric acid, formic acid, octanoic acid, and propionic acid significantly inhibited the growth of the fungus. Various nitrogen sources were substituted for sodium glutamate in the standard medium (on an equal nitrogen basis where possible). Casein hydrolysate and gelatin produced yields higher than that developed in the standard medium; other nitrogen sources produced lesser yields but still greater than those from the standard medium minus sodium glutamate: When various sulfur sources were substituted for methionine in the standard medium (on an equal sulfur basis), only cysteine and cystine produced dry weights comparable to that which developed in the standard medium. The following were very poor sulfur sources yet supported more growth than did the standard medium minus methionine: sodium sulfide, sodium thiosulfate, and thiourea. The ability of the other sulfur sources to support growth was questionable: potassium persulfate, sodium bisulfite, sodium dithionate, sodium hydrosulfite, sodium sulfate, sodium sulfite, and sodium thiocyanate. The standard medium contained only two nitrogen sources: sodium glutamate and methionine. Sodium glutamate served as a carbon source as well as a nitrogen source, but methionine could serve only as a source of sulfur.

18 citations

Journal ArticleDOI
TL;DR: In this article, two types of dispersion apparatus, the Venturi atomizer and the fritted-glass disperser, were studied for the absorption and subsequent liquid phase reaction of oxygen.
Abstract: The absorption and subsequent liquid-phase reaction of oxygen was studied with two types of dispersion apparatus, the Venturi atomizer and the fritted-glass disperser. The systems studied in both devices included the absorption of atmospheric oxygen by catalyzed sodium sulfite solutions and the simultaneous absorption of atmospheric oxygen with nitrogen dioxide and with sulfur dioxide by water. Very large values of the liquid-film mass transfer coefficient for oxygen absorption were measured in the atomization zone of the Venturi atomizer. Over-all recovery efficiencies were less than 2.3% for nitrogen dioxide but reached as much as 22% for sulfur dioxide. Oxidation efficiencies for sodium sulfite solutions ranged up to 80%, depending on the operating conditions. The fritted-glass disperser gave recovery efficiencies of nitrogen dioxide as high as 90% from air containing 10% of the gas. The recovery efficiency decreased at low concentrations of nitrogen dioxide for both the Venturi atomizer and the fritted-glass disperser.

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202240
202122
202073
2019114
2018143