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  • Reed Bro posted an update 8 hours, 16 minutes ago

    A microbial electrolysis cell (MEC) has been developing for enhanced absorbent regeneration in a chemical absorption-biological reduction integrated process for NO removal. In this work, the kinetics of electron transfer involved in the biocathodes along Fe(III)EDTA and Fe(II)EDTA-NO reduction was analyzed simultaneously. A modified Nernst-Monod kinetics considering the Faraday efficiency was applied to describe the electron transfer kinetics of Fe(III)EDTA reduction. The effects of substrate concentration, biocathodic potential on current density predicted by the model have been validated by the experimental results. Furthermore, extended from the kinetics of Fe(III)EDTA reduction, the electron transfer kinetics of Fe(II)EDTA-NO reduction was developed with a semi-experimental method, while both direct electrochemical and bioelectrochemical processes were taken into consideration at the same time. It was revealed that the developed model could simulate the electron transfer kinetics well. This work could not only help advance the biocathodic reduction ability and the utilization efficiency of electric power, but also provide insights into the industrial scale-up and application of the system. BACKGROUND Non-invasive respiratory ventilation has greatly improved the evolution of respiratory distress in neonates, especially for preterm infants, but few studies have investigated the use of non-invasive ventilation (NIV) in term infants. It is useful for neonatologists and nurses to identify the optimal ventilation strategy in terms of effectiveness for this group of newborns. The aim of our study was to investigate what type of respiratory support between nasal Continuous Positive Airway Pressure (nCPAP) or nasal Biphasic Positive Airway Pressure (nBiPAP) is more effective in term neonates with RDS. METHODS Our study was a retrospective observational study of 78 full term neonates who were admitted to the NICU at S. Bambino Hospital from December 2015 to December 2016 for respiratory distress at birth. All patients underwent non-invasive ventilation by nCPAP or nBiPAP were included. Oxygen saturations and vital signs were monitored continuously. We evaluated blood gas analysis parameters before treatment and after 1 h of ventilation. RESULTS During the study period, there were 78 full term newborns admitted in our NICU for neonatal distress who were treated with nCPAP ore nBIPAP ventilation. In nBiPAP patients, we noticed a statistically significant reduction in PaCO2 levels and FiO2 requirement with respect to nCPAP patients, after 1 h of ventilation with a simultaneous significant increase of pH and PaO2 levels. There was no difference in the length of NIV and hospital stay. Among nCPAP patients, two were then intubated and one developed a pneumothorax. CONCLUSION The results of our study showed that an early BiPAP ventilation on RDS is the more efficient NIV because it improves CO2 removal and reduces FiO2 requirement in comparison to nCPAP. Future studies can clarify if early BiPAP ventilation on RDS is the more efficient of NIV. BACKGROUND Very preterm children often have difficulties in behavioral functioning, but there is large heterogeneity in the severity of these difficulties and in the combination of the difficulties observed. Few studies so far addressed this heterogeneity by examining whether more homogeneous subtypes of behavioral functioning can be identified. AIMS To identify behavioral subtypes in a group of very preterm children, examine whether such subtypes are related to neonatal medical complications and/or parental education level (to better understand origins) and to examine whether such subtypes are associated with IQ and neurocognitive deficits in attention and executive function (to study underlying mechanisms of dysfunction). STUDY DESIGN Cross-sectional cohort study. SUBJECTS 135 very preterm (gestational age  less then  30 weeks and/or birthweight  less then  1000 g) children aged 8-12 years. MEASURES Parent and teacher questionnaires covering a broad range of behavioral domains, parental education level, neonatal medical complications, short-form Wechsler Intelligence Scale for Children-III and performance-based attention and executive function measures. RESULTS Cluster analysis indicated two behavioral subtypes a subtype characterized by low behavioral problems (76% of children) and a subtype characterized by high behavioral problems across behavioral domains (24% of children). Lower parental education level, lower IQ and poorer verbal working memory, visuospatial working memory and inhibition were associated with the high problems subtype, but neonatal medical complications were not. CONCLUSIONS The majority of very preterm children was assigned to the low behavioral problems subtype. However, if problems do occur, they are wide-spread across behavioral domains and accompanied by problems in neurocognitive domains. Pollution with total petroleum hydrocarbons (TPHs) is a global concern and particularly in coastal environments. Polycyclic aromatic hydrocarbons (PAHs) are regarded as the most toxic components of TPHs and they can also be derived from other sources. Fangcheng Port is considered as a representative emerging coastal city in China, but the status, sources, and hazards to organisms and humans with respect to contamination with PAHs and TPHs are unknown in the coastal regions of this area. Therefore, in this study, we cloned cytochrome P450 family genes (CYP1A1, CYP3A, and CYP4) and heat shock protein 70 gene (HSP70) in the clam Meretrix meretrix as well as optimizing the method for measuring the 7-ethoxyresorufin O-deethylase activity. These molecular indicators and four specific physiological indexes were found to be appropriate biomarkers for indicating the harmful effects of PAHs and TPHs on clams after exposure to the crude oil water-soluble fraction. In field monitoring surveys, we found that the 2- and 3-est that continuous monitoring of contamination by PAHs and TPHs is recommended in this emerging coastal city as well as assessing their human health risks. Endosulfan is a persistent organic pollutant and can cause endothelial dysfunction, closely related to cardiovascular diseases. Endothelial cell migration plays a critical role in atherosclerosis and angiogenesis. This study was aimed to investigate the effect of environmentally relevant doses of endosulfan and underlying molecular mechanism on endothelial cell migration. Human umbilical vein endothelial cells (HUVECs) were treated with DMSO (control) or endosulfan (0.1, 1, 10 and 20 μM) in the presence or absence of inhibitors. A-83-01 Wound healing and Transwell assay were employed to explore the effect of endosulfan on endothelial cell migration. The expression of genes or proteins was assayed by real-time PCR or immunoblotting. The results showed that endosulfan at relative low concentration (0.1, 1, 10 and 20 μM) increased cell migration ability horizontally and vertically at 12 h after exposure. In line with this cellular effect, Protein-tyrosine Phosphatase 4A3 (PTP4A3) expression was significantly increased in endosulfan-exposed endothelial cells.

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