Filtration In Gel
Mostrando 1-12 de 2525 artigos, teses e dissertações.
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1. Characterization and application of ceramic membranes prepared from Algerian kaolin
Resumo Neste estudo, um novo tipo de membrana cerâmica foi usado para a filtração de água com cor. A membrana foi preparada a partir de caulim argelino KT2 do tipo Milia. A escolha desta matéria-prima foi ditada pela sua abundância natural, para formar o suporte macroporoso preparado pela técnica de colagem. Uma camada de película fina funcional (com
Cerâmica. Publicado em: 14/11/2019
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2. Pentacyclic triterpenes and other constituents in propolis extract from Melipona beecheii collected in Yucatan, México
ABSTRACT Thirteen pentacyclic triterpenes, methyl 3-oxours-12-en-23-oate, marsformosanone, taraxerone, β-amyrenone, α-amyrenone, lupenone, 24-methylencycloartan-3-one, moretenol acetate, β-amyrin acetate, germanicol acetate, 24-methylencycloartanyl acetate, β-amyrin, and α-amyrin were identified in a chloroform-methanol propolis extract from Melipona be
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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3. Alternagin-C binding to α2β1 integrin controls matrix metalloprotease-9 and matrix metalloprotease-2 in breast tumor cells and endothelial cells
Abstract Background Matrix metalloproteinases (MMPs) are key players in tumor progression, helping tumor cells to modify their microenvironment, which allows cell migration to secondary sites. The role of integrins, adhesion receptors that connect cells to the extracellular matrix, in MMP expression and activity has been previously suggested. However, the m
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 24/05/2018
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4. BaltDC: purification, characterization and infrared spectroscopy of an antiplatelet DC protein isolated from Bothrops alternatus snake venom
Abstract Background: Snake venoms are a complex mixture of proteins, organic and inorganic compounds. Some of these proteins, enzymatic or non-enzymatic ones, are able to interact with platelet receptors, causing hemostatic disorders. The possible therapeutic potential of toxins with antiplatelet properties may arouse interest in the pharmacological areas.
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 08/02/2018
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5. Production, Purification and Physicochemical Properties of an Exo-Polygalacturonase from Aspergillus niger SW06
In this study, exo-polygalacturonase (exo-PG) production from Aspergillus niger SW06 was optimized by central composition design and high amount of 21.51 units mL-1 could be achieved in optimizing growth conditions. Both gel filtration and ion exchange chromatography revealed a single exo-PG activity peak, and sodium dodecyl sulfate polyacrylamide gel electr
J. Braz. Chem. Soc.. Publicado em: 2017-04
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6. Composition and biological activities of the aqueous extracts of three scleractinian corals from the Mexican Caribbean: Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea
Abstract Background: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activit
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 19/12/2016
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7. Production and Characterization of Bacteriocin Produced by Lactobacillus Viridescence(NICM 2167)
The present study focused on the production optimization of bacteriocin by Lactobacillus viridescence NICM 2167 followed by its purification and characterization. The bacteriocins are antimicrobial peptides produced by many Gram positive and Gram negative bacteria.The bacteriocin produced by LAB (lactic acid bacteria) received attention in recent years due t
Braz. arch. biol. technol.. Publicado em: 22/03/2016
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8. Cloning and purification of the first termicin-like peptide from the cockroach Eupolyphaga sinensis
Abstract Background Termicin is an antimicrobial peptide with six cysteines forming three disulfide bridges that was firstly isolated from the salivary glands and hemocytes of the termite Pseudacanthotermes spiniger. In contrast to many broad-spectrum antimicrobial peptides, termicin is most active against filamentous fungi. Although more than one hundred
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 19/02/2016
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9. Extraction, purification and characterization of inhibitor of trypsin from Chenopodium quinoa seeds
Abstract A novel trypsin inhibitor of protease (CqTI) was purified from Chenopodium quinoa seeds. The optimal extracting solvent was 0.1M NaCl pH 6.8 (p < 0.05). The extraction time of 5h and 90 °C was optimum for the recovery of the trypsin inhibitor from C. quinoa seeds. The purification occurred in gel-filtration and reverse phase chromatography. CqTI pr
Food Sci. Technol. Publicado em: 03/10/2015
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10. Bordonein-L, a new L-amino acid oxidase from Crotalus durissus terrificus snake venom: isolation, preliminary characterization and enzyme stability
BackgroundCrotalus durissus terrificus venom (CdtV) is one of the most studied snake venoms in Brazil. Despite presenting several well known proteins, its L-amino acid oxidase (LAAO) has not been studied previously. This study aimed to isolate, characterize and evaluate the enzyme stability of bordonein-L, an LAAO from CdtV.Methods The enzyme was isolated th
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 29/09/2015
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11. Biological characterization of compounds from Rhinella schneideri poison that act on the complement system
Background The skin secretions of toads of the family Bufonidae contain biogenic amines, alkaloids, steroids (bufotoxins), bufodienolides (bufogenin), peptides and proteins. The poison of Rhinella schneideri, formerly classified as Bufo paracnemis, presents components that act on different biological systems, including the complement system. The aim of this
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 29/09/2015
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12. Isolation of a thermostable acid phytase from Aspergillus niger UFV-1 with strong proteolysis resistance
An Aspergillus niger UFV-1 phytase was characterized and made available for industrial application. The enzyme was purified via ultrafiltration followed by acid precipitation, ion exchange and gel filtration chromatography. This protein exhibited a molecular mass of 161 kDa in gel filtration and 81 kDa in sodium dodecyl sulfate polyacrylamide gel electrophor
Braz. J. Microbiol.. Publicado em: 2015-03