Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Phys Rev E ; 95(6-1): 063207, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28709289

RESUMO

A self-consistent model of plasma polarization around an isolated micron-sized dust particle under the action of an external electric field is presented. It is shown that the quasineutral condition is fulfilled and the formed volume charge totally screens the dust particle. The ion focusing and wake formation behind the dust particle are demonstrated for different ion mean free paths and the external electric fields. It is obtained that at low values of the external electric field the trapped ions play the main role in the screening of the dust particle charge. For high external electric fields, the density of trapped ions decreases and the dust particle is screened mainly by the free ions.

2.
Artigo em Russo | MEDLINE | ID: mdl-26356615

RESUMO

AIM: To compare clinical and morphological results of treatment of ischemic stroke in three groups of patients which differed by the forms and duration of an antioxidant therapy. MATERIAL AND METHODS: A randomized clinical trial was performed in 8 vascular centers of the Russian Federation in 2010-2014. It included 373 patients with ischemic stroke in the carotid territory. Patients were randomized into 3 groups to receive different regimens of antioxidant therapy as an adjunct to standard therapy: control group (ascorbic acid; 132 patients); cytoflavin (20 ml per day for 10 days; 133 patients); cytoflavin (the dose was decreased to 10 ml per day from 11th to 20th day) (108 patients). Patient's condition was assessed in 1, 10 and 21 day by a complex of clinical, laboratory and instrumental methods. RESULTS AND CONCLUSION: The analysis of CT in 1th and 21th day revealed a significant 1,5-1,7- fold decrease in the cerebral ischemic lesion in both groups treated with cytoflavin with no significant morphologic changes in the ascorbic acid group. The percentage of patients with ischemic lesion, increased during days 1-21, was 2-fold higher in the ascorbic acid group compared to cytoflavin groups. Morphologic changes were correlated with clinical variables and outcome. In patients with ≥14 points on NIH scale on admission, prolonged 20 day cytoflavin therapy was associated with a more prominent improvement of neurologic, functional and cognitive status compared to 10-day cytoflavin infusion. No differences in clinical variables were observed in patients with mild symptoms (<14 points on NIH scale on admission) receiving cytoflavin for 10 and 20 days.


Assuntos
Antioxidantes/uso terapêutico , Ácido Ascórbico/uso terapêutico , Infarto Encefálico/tratamento farmacológico , Infarto Encefálico/patologia , Mononucleotídeo de Flavina/uso terapêutico , Inosina Difosfato/uso terapêutico , Niacinamida/uso terapêutico , Succinatos/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antioxidantes/administração & dosagem , Ácido Ascórbico/administração & dosagem , Infarto Encefálico/diagnóstico por imagem , Combinação de Medicamentos , Metabolismo Energético , Feminino , Mononucleotídeo de Flavina/administração & dosagem , Humanos , Infusões Intravenosas , Inosina Difosfato/administração & dosagem , Masculino , Pessoa de Meia-Idade , Niacinamida/administração & dosagem , Federação Russa , Succinatos/administração & dosagem , Tomografia Computadorizada por Raios X , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...