Recovering carbon fibers from waste CFRPs via pyrolysis-oxidation method: Implications for reuse in remanufactured materials.

Carbon fiber-reinforced polymer composites (CFRPs) have gained widespread usage due to their promising physiochemical properties, while this causes large amounts of waste CFRPs worldwide. In this study, carbon fibers were successfully recovered from waste CFRPs through the pyrolysis-oxidation method, and the recovered fibers were reused in remanufacturing the secondary generation CFRPs. Moreover, the individual and interactive effects of pyrolysis-oxidation recovering parameters on the mechanical strength of the resulting remanufactured CFRPs (reCFRPs) were investigated. The recovered carbon fibers displayed surface chemical structures similar to virgin fibers but with high contents of oxygen-containing bonds. The tensile strength retention (TSR) of the reCFRPs was primarily influenced by oxidation temperature. Notably, a higher oxidation temperature, especially exceeding 560 °C, amplified the impact of oxidation duration on the TSR value. Similarly, concerning interlaminar shear strength retention (ISSR), the oxidation stage had a more substantial effect compared to the pyrolysis stage. As the oxidation temperature increased from 500 °C to 600 °C, the ISSR value initially increased and then decreased, irrespective of variations in pyrolysis parameters. Additionally, through integrating the response surface methodology (RSM) analysis and multi-island genetic algorithm (MIGA) global optimization, three recovery strategies, along with the corresponding processing parameters, were proposed to meet diverse requirements. The conclusions could provide valuable insights for optimizing the recovery and reuse of carbon fibers from waste CFRPs.

Clinical Values of Combined Detection of CRP and D-D for AL Patients Complicated with DIC / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the clinical values of the combined detection of C-reactive protein (CRP) and D-dimer (D-D) for acute leukemia (AL) patients complicated with disseminated intravascular coagulation (DIC).</p><p><b>METHODS</b>Among 52 cases of AL, 20 cases of AL complicated with DIC were selected as AL+DIC group, 32 cases of AL were selected as AL group, 30 healthy volunteers were used as control group; the detected values of CRP and D-D in 3 groups were compared.</p><p><b>RESULTS</b>The CRP and D-D levels in AL+DIC group were significantly higher than those in AL and control groups (P < 0.05); the CRP and D-D levels in AL group were significatly higher than those in control group (P < 0.05). The D-D level and complicated DIC rate in patients with CRP < 10 mg/L were significantly lower than those in patients with CRP 10-100 and >100 mg/L (P <0.05), while the D-D level and complicated DIC rate in patients with 10-100 mg/L were significantly lower than those in patients with CRP > 100 mg/L (P <0.05). After treatment of patients, the CRP and D-D levels in AL and AL+DIC groups were obviously reduced as compared with levels of these 2 groups before treatment (P <0.05); the CRP and D-D levels in AL+DIC after treatment were significantly higher than those in AL group (P <0.05).</p><p><b>CONCLUSION</b>The combined detection of CRP and D-D possesses a higher reference value for diagnosis and differentiation of AL and AL complicated with DIC, thus also has an important role in evaluation of therapeutic efficacy of AL.</p>

Glucocorticoid combined with ulinastatin in treatment of Kawasaki disease in children: a non-randomized controlled clinical trial / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To investigate the clinical efficacy of glucocorticoid combined with ulinastatin in the treatment of Kawasaki disease (KD) in children.</p><p><b>METHODS</b>A total of 104 children who were admitted and diagnosed with typical KD between January 2011 and December 2013 were assigned to ulinastatin group (methylprednisolone+ulinastatin; n=46) and intravenous immunoglobulin (IVIG) group (n=58) according to the severity of KD and the willingness of their parents. Observations for the two groups were performed to compare the changes in coronary artery diameter before and at 1 week, 3 months, and 6 months after treatment, fever clearance time, retreatment condition, changes in white blood cells (WBC), platelets (PLT), hemoglobin (HB), C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR) at 1 week and 3 weeks after treatment, and total in-hospital cost.</p><p><b>RESYLTS</b>There was no significant difference in the coronary artery diameter between the two groups before or at 1 week, 3 months or 6 months after treatment (P>0.05). All the patients (100%) in the ulinastatin group vs 83% in the IVIG group had a normal body temperature after 48 hours of treatment (P<0.01). Two patients (4%) in the ulinastatin group and 10 patients (17%) in the IVIG group received retreatment. Significant differences were observed in ESR, WBC, and HB between them (P<0.01). The total in-hospital cost in the ulinastatin group was significantly lower than that in the IVIG group (P<0.01).</p><p><b>CONCLUSIONS</b>For children with KD, methylprednisolone combined with ulinastatin does not increase the risk of coronary artery aneurysm, decreases in-hospital costs, is superior in controlling laboratory markers and shortening the duration of fever during the acute phase compared with the IVIG therapy.</p>