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| Salem,Hesham; Samir,Ebtihal. |
| The aim of this work is to evaluate simple, sensitive, effective and validated procedures for the determination of cefotaxime, cefoperazone, ceftazidime and cefadroxil. In this study, the methods based on the ability of the cited drugs to reduce Ag+ ions to silver nanoparticles (Ag-NPs) in the presence of Polyvinyl Pyrrolidone (PVP) as a stabilizing agent producing very intense surface plasmon resonance peak of Ag-NPs (λmax. = 410-430 nm). The plasmon absorbance of the Ag-NPs allows the quantitative spectrophotometric determination of the cited drugs. The calibration curves are linear with concentration ranges of 0.4-3.2, 1-8, 0.5-4.0 and 1.5-9.0 µg/mL for cefotaxime, cefoperazone, ceftazidime and cefadroxil, respectively. Apparent molar absorptivity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Silver nanoparticles; Cefotaxime; Cefoperazone; Ceftazidime; Cefadroxil. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000300617 |
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| Wiebke,Beatriz; Ferreira,Fabricio; Pasquali,Giancarlo; Bodanese-Zanettini,Maria Helena; Droste,Annette. |
| The influence of different antibiotic treatments in soybean genetic transformation was evaluated. First, an assay was performed to verify how different antibiotic treatments affect soybean embryogenic tissues. The effect of carbenicillin at 500 mg L-1 was genotype-dependent. This antibiotic did not affect embryo survival of cv. IAS5, but a three-fold increase of embryo proliferation was observed for cv. Bragg, when compared to the control. On the other hand, cefotaxime at 350 and 500 mg L-1 caused death of embryogenic tissues of both cultivars. Finally, the association of cefotaxime (250 mg L-1) + vancomycin (250 mg L-1) did not affect negatively the somatic embryos of tested cultivars until 63 days of treatment. Thereafter, a second experiment was carried... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrobacterium tumefaciens; Carbenicillin; Cefotaxime; Genetic transformation; Glycine max; Vancomycin. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052006000400002 |
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