Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Publication year range
1.
Int J Pharm ; 490(1-2): 229-39, 2015 Jul 25.
Article in English | MEDLINE | ID: mdl-25987212

ABSTRACT

The pressure ulcer healing is a complex process and difficult to be achieved. Insulin is known to promote wound healing, and when complexed with cyclodextrin presents improved solubility, stability and biological activity. Complexation of insulin with hydroxypropyl-beta-cyclodextrin (HPßCD) was performed in this work through the coprecipitation method, providing the inclusion complex (HPßCD-I). The spectroscopic techniques used to analyze the complex were H(1) NMR, FT-Raman and FT-IR/ATR. A gel containing the HPßCD-I complex was prepared and a clinical study was conducted in patients with pressure ulcers. The spectroscopic techniques allowed to confirm the complex formation through the inclusion of aromatic amino acids, such as phenylalanine present in the HPßCD cavity. Data obtained from the FT-Raman and FT-IR/ATR techniques, combined with the H(1) NMR results, showed the effectiveness of these techniques in evaluating the inclusion complex of HPßCD with insulin. Clinical studies demonstrated tissue revitalization and a trend (p=0.06) for a significant difference between the healing effect of the control gel and that with HPßCD-I complex. The creation of the gel prepared with insulin and HPßCD-I complex and its use in patients with pressure ulcers appears to be promising in wound healing and its possible use in hospital care.


Subject(s)
Insulin/chemistry , Insulin/therapeutic use , Pressure Ulcer/drug therapy , Wound Healing/drug effects , beta-Cyclodextrins/chemistry , 2-Hydroxypropyl-beta-cyclodextrin , Aged , Calorimetry, Differential Scanning/methods , Humans , Magnetic Resonance Spectroscopy/methods , Middle Aged , Solubility , Spectroscopy, Fourier Transform Infrared
2.
Acta sci., Health sci ; 26(2): 357-364, jul.-dez. 2004. ilus, tab, graf
Article in Portuguese | LILACS | ID: lil-413751

ABSTRACT

Atualmente, quando todos os caminhos levam à busca da qualidade total, torna-se indispensável conhecer perfeitamente cada fase de um processo produtivo. Neste caso, a validação é a ferramenta adequada para garantir a confiabilidade de instalação de um processo produtivo, de equipamento e, inclusive, da metodologia analítica. Dessa forma, o presente trabalho teve por objetivo analisar os principais aspectos da validação de métodos analíticos a quantificação do captopril. Foi realizada a validação e a comparação dos seguintes métodos: titulométrico por óxido-redução, espectrofotométrico por Folin-Ciocalteau e cromatográfico por cromatografia líquida de alta eficiência - CLAE. Os atributos de exatidão, precisão, linearidade, especificidade e robustez foram estudados para cada metodologia. Os resultados obtidos demonstraram que o método cromatográfico foi o mais adequado para as análises dos comprimidos de Captopril 25 mg, enquanto que os métodos espectrofotométrico e titulométrico demonstraram valores que satisfazem os critérios de aceitação, porém, com maior variabilidade e menor sensibilidade


Subject(s)
Humans , Captopril , Total Quality Management , Models, Theoretical , Methods , Spectrophotometry
SELECTION OF CITATIONS
SEARCH DETAIL
...