Oxidation Resistance of Iron and Copper Foils Coated with Reduced Graphene Oxide Multilayers

Protecting the surface of metals such as Fe and Cu from oxidizing is of great importance due to their widespread use. Here, oxidation resistance of Fe and Cu foils was achieved by coating them with reduced graphene oxide (rG-O) sheets. The rG-O-coated Fe and Cu foils were prepared by transferring rG-O multilayers from a SiO₂ substrate onto them. The oxidation resistance of these rG-O-coated metal foils was investigated by Raman spectroscopy, optical microscopy, and scanning electron microscopy after heat treatment at 200 °C in air for 2 h. The bare metal surfaces were severely oxidized, but the rG-O-coated metal surfaces were protected from oxidation. This simple solution process using rG-O is one advantage of the present study

Prediction of survival in terminally ill cancer patients at the time of terminal cancer diagnosis

We aimed to investigate the prognostic factors that can predict terminal stage survival (TSS) at the time of terminal cancer diagnosis. We prospectively evaluated 141 patients immediately after the diagnosis of terminal cancer by their attending oncologists. A total of 32 factors, including performance status, clinical prediction of survival, time to terminal cancer (TTC), clinical symptoms, signs, and laboratory tests including the neutrophil-lymphocyte ratio (NLR), were analyzed. TSS was defined as the time from the diagnosis of terminal cancer to death. The mean age of the 141 patients studied was 58.7 years, and 53 were female (38 %). The median TSS was 1.7 months (95 % confidence interval [CI] 1.43-1.97). In the univariate analyses, the TSS was significantly associated with 16 of the 32 factors tested. In the multivariate analysis, a lower Karnofsky performance status (KPS), a shorter TTC (< 24 months), a high NLR (a parts per thousand yen5), and a high C-reactive protein (CRP) level (a parts per thousand yen10 mg/dL) were independently associated with a poorer prognosis. A scoring system (scale, 0-6) developed based on the multivariate analysis could be used to classify terminal cancer patients into better (0-2 points; TSS 3.9 months), intermediate (3-4 points; TSS 1.7 months), or worse (5-6 points; TSS 0.9 month, P < 0.001) prognosis. The median TSS after the diagnosis of terminal cancer in advanced cancer patients was 1.7 months. The scoring system using KPS, TTC, NLR, and CRP could predict TSS in these patients.

Oxidation Resistance of Iron and Copper Foils Coated with Reduced Graphene Oxide Multilayers

Protecting the surface of metals such as Fe and Cu from oxidizing is of great importance due to their widespread use. Here, oxidation resistance of Fe and Cu foils was achieved by coating them with reduced graphene oxide (rG-0) sheets. The rG-0-coated Fe and Cu foils were prepared by transferring rG-0 multilayers from a SiO2 substrate onto them. The oxidation resistance of these rG-0-coated metal foils was investigated by Raman spectroscopy, optical microscopy, and scanning electron microscopy after heat treatment at 200 degrees C in air for 2 h. The bare metal surfaces were severely oxidized, but the rG-0-coated metal surfaces were protected from oxidation. This simple solution process using rG-0 is one advantage of the present study.close1