RESUMO
Cutting tools have long been coated with an AlCrN hard coating system that has good mechanical and tribological qualities. Boron (B) and vanadium (V) additions to AlCrN coatings were studied for their mechanical and tribological properties. Cathodic multi-arc evaporation was used to successfully manufacture the AlCrBN and AlCrVN coatings. These multicomponent coatings were applied to the untreated and plasma-nitrided surfaces of HS6-5-2 and H13 steels, respectively. Nanoindentation and Vickers micro-hardness tests were used to assess the mechanical properties of the materials. Ball-on-flat wear tests with WC-Co balls as counterparts were used to assess the friction-wear capabilities. Nanoindentation tests demonstrated that AlCrBN coating has a higher hardness (HIT 40.9 GPa) than AlCrVN coating (39.3 GPa). Steels' wear resistance was significantly increased by a hybrid treatment that included plasma nitriding and hard coatings. The wear volume was 3% better for the AlCrBN coating than for the AlCrVN coating on H13 nitrided steel, decreasing by 89% compared to the untreated material. For HS6-5-2 steel, the wear volume was almost the same for both coatings but decreased by 77% compared to the untreated material. Boron addition significantly improved the mechanical, tribological, and adhesive capabilities of the AlCrN coating.
RESUMO
BACKGROUND: When infected with the chikungunya virus (CHIKV), 3% to 28% of CHIKV-infected individuals remain asymptomatic, necessitating the development of improved high-throughput screening methods to overcome the limitations of molecular diagnostics or enzyme-linked immunosorbent assays (ELISAs). OBJECTIVE: In this study, two novel monoclonal antibodies (mAbs) targeting envelope 1 (E1) of CHIKV were developed and applied in a fluorescence-linked immunosorbent assay (FLISA) using coumarin-derived dendrimer as the fluorophore. METHODS: The performance of the FLISA was compared with that of ELISA. RESULTS: Using the two novel mAbs (2B5 and 2C8), FLISA could detect 1 × 105 PFU/mL of CHIKV, exhibiting a 2-fold lower limit of detection (LOD) compared to ELISA. The LOD of FICT corresponded to a comparative threshold value of 23.95 and 4 × 106 of RNA copy number/µL. In the presence of human sera and blood, virus detection by FLISA was 3-fold better than ELISA, with an LOD of 2 × 105 PFU/mL. Sera and blood interfered with the ELISA, resulting in 6 × 105 PFU/mL as the LOD. CONCLUSIONS: FLISA using two novel mAbs and coumarin-derived dendrimer is a superior diagnostic assay for detecting CHIKV in human sera and blood, compared to conventional ELISA.
Assuntos
Antígenos Virais/análise , Febre de Chikungunya/diagnóstico , Vírus Chikungunya/isolamento & purificação , Testes Diagnósticos de Rotina/métodos , Fluorometria/métodos , Técnicas Imunoenzimáticas/métodos , Proteínas do Envelope Viral/análise , Anticorpos Monoclonais/imunologia , Anticorpos Monoclonais/isolamento & purificação , Anticorpos Antivirais/imunologia , Anticorpos Antivirais/isolamento & purificação , Vírus Chikungunya/imunologia , Humanos , Sensibilidade e EspecificidadeRESUMO
A clinical characteristics prospective study on 55 patients who suffer from acute psychosis disorder and temporary and 30 among them are multi acute rebellious disorder without the symptom of schizophrenia. The result showed that: the average initial age of acute psychosis disorder and temporary: 29.0 ± 11.29. There is no difference between male and female. The rate of acute rebellious disorder and temporary combine with SCTL is low:14.5%. For the multi acute psychosis disorder patient without the symptom of schizophrenia. The onset of disease is often sudden and rapid. Average duration of disease is short and is shorter significantly than that of other acute psychosis disorders as schizophrenia. All of them have delusion, especially persecution illusion (90%), most of them have more than two illusions: (86.7%); the illusion are often occur uncontinuously and temporary, illusion combine with hallucination seen in 70%. Some types of hallucination: fast hallucination: 70%, the content of its hallucination is complicate, mainly hallucination of hearing which appear uncontinuously: 66,7%, hallucination of hearing from outside are often seen: 66.7%. Emotion disorder often seen: anxiety: 50%, mania and depression:46.7%, unstable emotion: 36.7%
