Preparation of glass shell fly ash-clay based lightweight aggregate with low water absorption by using sodium carbonate solution as binder

A method for staining mitochondria is described in which sections are overstained with acid fuchsine, differentiated in sodium carbonate solution, and counterstained with a methyl blue acting as an acid dye.

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Effective sericin-fibroin separation from Bombyx mori silkworms fibers and low-cost salt removal from fibroin solution

Revista Facultad de Ingeniería Universidad de Antioquia ◽

10.17533/udea.redin.20190731 ◽

2019 ◽

pp. 97-101

Author(s):

Estefanía Echeverri-Correa ◽

David Orlando Grajales-Lopera ◽

Santiago Gutiérrez-Restrepo ◽

Claudia Patricia Ossa-Orozco

Keyword(s):

Bombyx Mori ◽

Sodium Carbonate ◽

Textile Industry ◽

Sodium Carbonate Solution ◽

Low Cost ◽

High Surface ◽

Chemical Properties ◽

Surface Reactivity ◽

Carbonate Solution ◽

Cellulose Membrane

Silk from Bombyx mori has two main proteins: fibroin and sericin. Fibroin is a protein that exhibits good biocompatibility and high surface reactivity, desirable properties for many biomedical applications. Sericin is related with adverse immune response in some medical uses. Therefore, its removal (degumming) is desirable in almost all fields, including the textile industry and biological applications. In this study, three degumming methods (distilled water, liquid neutral detergent and sodium carbonate solution) were evaluated using Raman spectroscopy. Degummed silk treated with sodium carbonate solution exhibits a pattern consistent with previous studies for sericin-free fibroin, and significant differences with the untreated silk pattern. Also, degummed fibroin fibers were dissolved in a calcium chloride solution, in pursuit of a more versatile material. Additionally, different porous membranes of dialysis tubes were tested to remove residual salts, and were compared by conductivity measurements and EDS analysis, identifying good performance for an affordable food cellulose membrane. The results showed that it is possible to obtain fibroin with adequate chemical properties, using low-cost process and membrane of dialysis tubes.

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Experiments on the hydrothermal alteration of mordenite rocks in sodium carbonate solution, with reference to analcimization around kuroko deposits

Economic Geology ◽

10.2113/gsecongeo.70.4.770 ◽

1975 ◽

Vol 70 (4) ◽

pp. 770-780 ◽

Cited By ~ 1

Author(s):

Hiroshi Abe ◽

M. Aoki

Keyword(s):

Hydrothermal Alteration ◽

Sodium Carbonate ◽

Sodium Carbonate Solution ◽

Carbonate Solution ◽

Kuroko Deposits

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Synthesis of 5,6-Diaryl-1,2,4-triazines

Zeitschrift für Naturforschung B ◽

10.1515/znb-1978-1228 ◽

1978 ◽

Vol 33 (12) ◽

pp. 1503-1507 ◽

Cited By ~ 2

Author(s):

Farid S. G. Soliman ◽

Ibrahim M. Labouta ◽

A. Ibrahim El Sebai ◽

S. A. Shams El Dine

Keyword(s):

Acetic Acid ◽

Acetic Anhydride ◽

Sodium Carbonate ◽

Sodium Carbonate Solution ◽

Carbonate Solution ◽

Aqueous Acetic Acid ◽

Semicarbazide Hydrochloride

AbstractThe synthesis of 6-(4-methoxyphenyl)-5-phenyl-3-oxo-2,3-dihydro-1,2,4-triazine (5a) from 4-methoxybenzoin, 4-methoxybenzil, or 4-methoxybenzoin semicarbazone and semi-carbazide hydrochloride is reported. The condensation of 4-methoxybenzil with thiosemi-carbazide yielded 6-(4-methoxyphenyl)-5-phenyl-3-thioxo-2,3-dihydro-I,2,4-triazine (5b) which was converted to its 3-oxo analogue 5 a with acetic anhydride. Reduction of 5 a and 5 b with zinc and aqueous acetic acid led to the corresponding 2,3,4,5-tetrahydro-1,2,4-triazines 6 a and 6b, respectively. Oxidation of 5 b with iodine in sodium carbonate solution afforded bis [6-(4-methoxyphenyl)-5-phenyl-1,2,4-triazin-3-yl]disulphide (7). Analogous triazines were prepared by condensing 3,3'-diiodobenzil with semicarbazide hydrochloride or thiosemicarbazide.

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