This study evaluated the differences in the appearance of COVID-19 pneumonia on chest computed tomography (CT) images of outpatient and cases that developed during hospitalisation.

Chest CT images of 66 patients (median age, 76years; range, 29-94years) who underwent the severe acute respiratory syndrome coronavirus-2 reverse-transcription polymerase chain reaction (RT-PCR) test were included in this retrospective study. The chest CT appearance was categorised as “typical,” “indeterminate,” “atypical,” or “negative” in accordance with the recommendations of the Radiological Society of North America for COVID-19 pneumonia and compared among the following four subgroups PCR-positive outpatient (n=14); PCR-positive hospitalised (n=7); PCR-negative outpatient (n=9); and PCR-negative hospitalised (n=36).

The frequency of “typical” findings in the PCR-positive outpatient cases (13/14, 92.9%) was significantly higher than that of those in the PCR-positive hospitalised cases (2/7, 28.6%, P=0.022). There was no sd time course of the infection, are required for the management of such cases.Recent reports have suggested COVID-19 relapse or reinfection may lead to readmission, which may cause a diagnostic challenge between recently infected patients and reinfections. Compounding this problem is the post-viral lung sequela that may be expected after COVID-19 pneumonia, similar to both SARS and MERS. Although chest imaging may play a role in the diagnosis of primary SARS-CoV-2 infection, reinfection or relapse of COVID-19 will have similar imaging findings. A “new-baseline” imaging can be obtained from COVID-19 patients at the time of hospital discharge or clinical recovery. This new reference can not only determine if readmissions are from relapse or reinfection of COVID-19, resolving COVID-19 or potentially a different viral infection (influenza), but also for long term sequela of COVID-19 lung infection. Strategic use of imaging before discharge may be helpful in the subset of the population at the highest risk of a secondary viral infection such as influenza. Determining the residual abnormalities in post-discharge imaging can guide us in the long-term management of patients for many years to come.

Being victimized by peers has been shown to be associated with a range of adolescent problems, including mobile phone addiction (MPA). Although being victimized is assumed to lead to problem behavior, the reverse could also occur. In this longitudinal study we tested the reciprocal effects of victimization and MPA, taking into account the role of adolescent depression in these effects.

The sample included 1987 adolescents from middle schools in Guangdong and Shandong Provinces, China (56.10% male; M

at Wave 1=12.32). Three waves of questionnaire data were collected at half-year intervals during the transition from 7th to 8th grade. Cross-lagged models were adopted for data analysis.

Peer victimization at W1/W2 predicted MPA at W2/W3, and the inverse relation was also significant MPA at W1/W2 positively predicted peer victimization at W2/W3. Furthermore, the bidirectional association between peer victimization and MPA was mediated by adolescent depression.

This is the first longitudinal study on the relation between MPA and associated problems. Victimization by peers and MPA appear to have mutual influences over time that are explained in part by adolescent depression. The results have potential applied value for promoting adolescent adjustment.

This is the first longitudinal study on the relation between MPA and associated problems. Victimization by peers and MPA appear to have mutual influences over time that are explained in part by adolescent depression. The results have potential applied value for promoting adolescent adjustment.Biocover systems are a cost-effective technology utilised to mitigate methane (CH4) and trace gas emissions from landfills. A full-scale biofilter system was constructed at Glatved landfill, Denmark, consisting of three biofilters with a total area of 3950 m2. Landfill gas collected mainly from shredder waste cells was mixed with ambient air and fed actively into the biofilter, resulting in an average load of 60-75 g m-2 d-1 for CH4 and 0.15-0.21 g m-2 d-1 for trace gases (e.g., aromatics, chlorofluorocarbons (CFCs), aliphatic hydrocarbons). The initial CH4 surface screening showed uneven gas distribution into the system, and elevated surface concentrations were observed close to the gas inlet. Both positive and negative CH4 fluxes, ranging from -0.36 to 4.25 g m-2 d-1, were measured across the surface of the biofilter. Total trace gas emissions were between -0.005 and 0.042 g m-2 d-1, and the emission flux of individual compounds were generally small (10-8 to 10-3 g m-2 d-1). Vertical gas concentration profiles showed that the oxidation of CH4 and easily degradable trace compounds such as aromatics and aliphatic hydrocarbons happened in the aerobic zones, while CFCs were degraded in the anaerobic zone inside the compost layer. In addition, oxidation/degradation of CH4 and trace gases also occurred in the gas distribution layer, which contributed significantly to the overall mitigation efficiency of the biofilter system. Overall, the biofilter system showed mitigation efficiencies of nearly 100% for both CH4 and trace gases, and it might have the potential to work under higher loads.Over the years, China has imported a significant quantity of plastic waste from the rest of the world. In December 2017, however, it implemented a ban on the import of plastic waste, used paper, and miscellaneous scrap goods. TP-1454 This study aims to provide new insight on the waste trade, with specific focus on the market for recyclable plastics. By employing an economic surplus analysis, we investigate the impact of China’s import ban on the market for recyclable plastics in China and Japan. Obtained results suggest a significant change in economic surpluses; Japan and China’s surpluses reduced by 58 billion yen and 1,304 billion yen at the maximum, respectively.Urban forestry generates a huge amount of waste worldwide, resulting from the processes of pruning and suppression. Disposal in landfills reduces the useful life of these facilities and forgoes the possibility of generating income from the waste. This study investigated the manufacture of toys as a strategy to valorize urban forestry waste. For this, physical-mechanical, chemical (extractive), color and shape characterizations were performed for three species of urban trees commonly planted in Brazil, a region of Neotropical forests. Toy prototypes were developed and manufactured from wood waste. Regarding color, all studied species showed high value of the variable b*, which refers to the blue-yellow axis. Handroanthus heptaphyllus wood had the highest values of basic density (0.706 g.cm-3) and Janka hardness (1142, 1027 and 1669 kgf.cm-2 for radial, tangential and transverse directions, respectively), and had the lowest volumetric shrinkage (11.38%). The lowest content of total extractives was measured in Handroanthus heptaphyllus, 6.