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Identification and properties of two extracellular proteases from Brevundimonas diminuta BJM
Chaia,André Adriano; Giovanni-De-Simone,Salvatore; Petinate,Simone Dias Gonçalves; Lima,Ana Paula Cabral de Araújo; Branquinha,Marta Helena; Vermelho,Alane Beatriz.
Extracellular proteases from Brevundimonas diminuta (syn. Pseudomonas diminuta) were studied in sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) containing a copolymerized substrate. Two proteases were detected migrating at 67 kDa and 50 kDa: both of them hydrolysed preferentially gelatin, but casein was also degraded and a slight hydrolysis was observed with hemoglobin. No detectable extracellular proteolytic activity was found in bovine serum albumin-containing gels. The optima temperature and pH for proteolytic activity were between 40ºC and 50ºC in a pH ranging from 7.0 to 11.0, respectively. These enzymes were isolated by analytical high performance liquid chromatography (HPLC). Protease assays with the synthetic substrate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Metalloproteases; Brevundimonas diminuta; Pseudomonadaceae; Extracellular proteases.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000100007
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Development and characterization of photoprotective formulations containing keratin particles BJPS
Teixeira,Jessica; Freitas,Zaida Maria Farias de; Monteiro,Mariana Sato de Souza Bustamante; Vermelho,Alane Beatriz; Ricci Junior,Eduardo; Santos,Elisabete Pereira dos.
This work deals with development and evaluation of MFQ protective formulation, which contains two organic filters, namely: octyl-p-methoxycinnamate (OMC) and benzophenone-3 (BP-3); a photostabilizing agent called ethylhexylmethoxycrylene (EHMCR) and keratin particles. The MFQ formulation was evaluated in order to measure its pH, spin-spin lattice relaxation time (T2H), occlusivity factor, formulation efficacy, photostability and skin permeation, as well as keratin particle properties. Keratin particle size increased when incorporated to formulation, however, it did not affect pH. The MFQ formulation was found to be photostable and photoprotective, as evidenced by sunlight photostability test, sun protection factor (SPF), UVA/UVB ratio and critical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sunscreen; Keratin; Octylmethoxycinnamate; Benzophenone-3; Ethylhexylmethoxycrylene.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100597
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