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1.
Environ Sci Pollut Res Int ; 26(10): 9672-9685, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30734252

RESUMO

Photocatalytic oxidation of formaldehyde (HCHO) is considered as one of the promising ways to resolve indoor air HCHO pollution. TiO2 has been well known as the most extended application in photocatalysis due to its strong oxidizing ability and stability. Owing to high activity under visible light irradiation, TiO2 and Bi2O3 doping mixed with Bi2WO6 was analyzed in this study. The formation of two kinds of heterojunction caused efficient charge separation, leading to the effective reduction in the recombination of photo-generated electron and hole. The special structure and enhanced performance of these catalysts were analyzed. For the first time, the loading of alkali salts was researched for photocatalytic oxidation. In order to understand the reaction mechanism of alkali salts enhanced effects, the catalysts were investigated by using BET, XRD, UV-Vis, FT-IR, SEM, and XPS. The results found more than 2 wt% of Na2SO4 loading and the mixed methods with different solutions were key factors affecting the performance of catalysts. Nearly 92% HCHO conversion could be completed over Bi2WO6/Bi0.15Ti0.85O2 (Na2SO4), and the concentration of HCHO was only 0.07 mg/m3 for 24 h, which was below the limit of specification in China. The results also indicated that the solution mixing method was more favorable to increase the HCHO conversion due to decrease the size of Bi0.15Ti0.85O2 particles. The catalysts with Na2SO4 loading provided more surface-adsorbed oxygen that facilitated the desorption of CO2 and markedly increased the photocatalytic oxidation of HCHO. Graphical abstract Plausible mechanism over W-Bi2WO6/ Bi0.15Ti0.85O2-Na2SO4 (1:4) catalysts.


Assuntos
Formaldeído/química , Modelos Químicos , Adsorção , Poluição do Ar em Ambientes Fechados/análise , Álcalis , Bismuto/química , Catálise , China , Luz , Oxirredução , Oxigênio , Processos Fotoquímicos , Espectroscopia de Infravermelho com Transformada de Fourier , Titânio/química , Compostos de Tungstênio/química
2.
Biomed Res Int ; 2017: 7501807, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28695130

RESUMO

BACKGROUND: There are some theoretical concerns for the use of intraoperative cell salvage (ICS) in patients with ectopic pregnancy. This study aimed to observe the impact of ICS on the coagulation function and clinical outcomes of patients with ruptured ectopic pregnancy and severe blood loss. METHODS: This was a retrospective study of 225 patients with ruptured ectopic pregnancy and severe blood loss treated at the Third Affiliated Hospital of Guangxi Medical University between January 2012 and May 2016. Patients were grouped according to ICS (n = 116) and controls (n = 109, allogenic transfusion and no transfusion). RESULTS: Compared with controls, patients with ICS had shorter hospitalization (P = 0.007), lower requirement for allogenic blood products (P < 0.001), and higher hemoglobin levels at discharge (P < 0.001). There were no complications/ adverse reactions. In the ICS group, hemoglobin at discharge (-6.5%, P = 0.002) and thrombin time (-3.7%, P = 0.002) were decreased 24 h after surgery, while 24 h APTT was increased (+4.6%, P < 0.001). In the control group, hemoglobin at discharge (-16.8%, P < 0.001) was decreased after surgery and 24 h APTT was increased (+2.4%, P = 0.045). At discharge, hemoglobin levels were higher in the ICS group (P < 0.001). CONCLUSION: ICS was associated with good clinical outcomes in patients with ruptured ectopic pregnancy and severe blood loss.


Assuntos
Perda Sanguínea Cirúrgica/prevenção & controle , Transfusão de Sangue Autóloga , Gravidez Ectópica/terapia , Ruptura Espontânea/terapia , Adulto , Coagulação Sanguínea , Estudos de Casos e Controles , Feminino , Humanos , Gravidez , Gravidez Ectópica/sangue , Gravidez Ectópica/cirurgia , Ruptura Espontânea/sangue , Ruptura Espontânea/cirurgia
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