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1.
Comput Intell Neurosci ; 2022: 6138490, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36072725

RESUMO

One of the most prevalent diseases that can be initially identified by visual inspection and further identified with the use of dermoscopic examination and other testing is skin cancer. Since eye observation provides the earliest opportunity for artificial intelligence to intercept various skin images, some skin lesion classification algorithms based on deep learning and annotated skin photos display improved outcomes. The researcher used a variety of strategies and methods to identify and stop diseases earlier. All of them yield positive results for identifying and categorizing diseases, but proper disease categorization is still lacking. Computer-aided diagnosis is one of the most crucial methods for more accurate disease detection, although it is rarely used in dermatology. For Feature Extraction, we introduced Spectral Centroid Magnitude (SCM). The given dataset is classified using an enhanced convolutional neural network; the first stage of preprocessing uses a median filter, and the final stage compares the accuracy results to the current method.


Assuntos
Melanoma , Dermatopatias , Inteligência Artificial , Dermoscopia/métodos , Humanos , Melanoma/patologia , Pele/patologia
2.
J Biomater Appl ; 24(1): 47-64, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-19386664

RESUMO

The present study was designed to assess and compare with a range of surfactant-coated, nimesulide-free, and nimesulide-loaded ethylcellulose/methylcellulose (EC/MC) nanoparticles that were prepared by varying drug concentration (ED/MD), polymer concentration (EP/MP), and surfactant concentration (ES/MS). EC/MC nanoparticles prepared by desolvation method produced discrete particles and they were characterized by SEM, AFM, and FTIR studies. The particles mean size diameter (nm) ranged from 244 to 1056 nm and 1065 to 1710 nm for EC and MC nanoparticles, respectively. Studies on drug: polymer ratio showed a linear relationship between drug concentration and percentage of loading in nanoparticles. The encapsulation efficiency decreased with the increase of nimesulide concentration with respect to polymer concentration. Encapsulation efficiency of drug-loaded nanoparticles was varied between 32.8% and 64.9%. The in vitro release of drug-loaded nanoparticles was found to be a first order. This was significantly increased in EC nanoparticles (95.50%) in comparison with MC nanoparticles (95.12%) after 12 h in 24 h long study. Nimesulide release from EC nanoparticles was much slower at slightly alkaline pH 7.4. The in vitro hemolysis tests of nanoparticles were carried out to ascertain the hemocompatibility and shown to be insignificant for EC nanoparticles. In comparison, ES4 from EC formulations with nimesulide was found to be promising with slow and sustained drug release.


Assuntos
Anti-Inflamatórios não Esteroides/química , Celulose/análogos & derivados , Portadores de Fármacos/química , Nanopartículas/administração & dosagem , Nanopartículas/química , Sulfonamidas/administração & dosagem , Sulfonamidas/química , Administração Oral , Anti-Inflamatórios não Esteroides/toxicidade , Celulose/química , Celulose/toxicidade , Portadores de Fármacos/toxicidade , Hemólise/efeitos dos fármacos , Humanos , Metilcelulose/administração & dosagem , Metilcelulose/química , Microscopia de Força Atômica , Nanopartículas/toxicidade , Tamanho da Partícula , Espectroscopia de Infravermelho com Transformada de Fourier , Sulfonamidas/toxicidade
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