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| 1 | Decay resistance and dimensional stability improvement of wood by low melting point alloy heat treatment显示文摘Wood has no inherent natural resistance against agents of biodegradation. We evaluated the effects of metal bath heat treatment(MBHT) on decay resistance and dimensional stability of Chinese parasol(Firmiana simplex) and Chinese fir(Cunninghamia lanceolata) wood. A low melting point alloy was used as heating medium in the treatment of the wood samples at 150, 180, and 210 °C for2, 4, and 8 h. Heat-treated and control samples were exposed to brown rot fungus(Poria placenta) and white rot fungus(Coriolus versicolor) for decay resistance testing and anti-swelling efficiency(ASE). The improved decay resistance with increase temperatures with low mass losses of 7.3 and 7.3% for F. simplex, and 3.9 and 3.6% for C.lanceolata at 210 °C for 8 h against Coriolus versicolor and Poria placenta, respectively. ASE indicated that MBHT contributed to improved dimensional stability of both wood species after treatment. Scanning electron micrograph results indicate that metal bath-treated samples showed strong decay resistance. Therefore, our approach to thermally modify wood should be explored to overcome the energy utilization by using low melting point alloy for the heat treatment of wood. | Kufre Edet Okon Fengcai Lin Yandan Chen Biao Huang | 2018 | Journal of Forestry Research2018，29，6： | 1 |
| 2 | Tin-based metal bath heat treatment: an efficient and recyclable green approach for Pinus massoniana wood modification显示文摘Pinus massoniana L. was thermally treated with low melting point alloy as heating medium to investigate the strength properties changes. Contact angle, color and scanning electron microscopy were recorded to assess the effectiveness of the treatment. Samples were pre-treated in a micro-wave for 5 min followed by metal bath heat treatment at 150, 180, and 210 °C for 2, 4, and 8 h,respectively. Strength properties of metal bath treated wood were decreased with increase temperature and time.Density, modulus of rupture, impact bending, modulus of elasticity were reduced for all treatments. Maximum compressive strength slightly increased at 150 °C for 4 h followed by gradual reduction. The Janka hardness was reduced in the tangential and radial directions. Treatment of the wood at 210 °C for 8 h caused the wood to become brittle and rupture. The contact angle was considerably higher after thermal treatment. The color of the wood became darker with increasing temperature of thermal treatment. Micrographs of the heat-treated samples showed damage to the cell wall with increase in temperature. Metal bath heat treatment of wood was carried out successfully and some strength properties were reduced. | Kufre Edet Okon Fengcai Lin Yandan Chen Biao Huang | 2018 | Journal of Forestry Research2018，29，6： | 1 |
| 3 | A broadly neutralizing human monoclonal antibody against the hemagglutinin of avian influenza virus H7N9显示文摘Background:The new emerging avian influenza A H7N9 virus,causing severe human infection with a mortality rate of around 41%.This study aims to provide a novel treatment option for the prevention and control of H7N9.Methods:H7 hemagglutinin(HA)-specific B cells were isolated from peripheral blood plasma cells of the patients previously infected by H7N9 in Jiangsu Province,China.The human monoclonal antibodies(mAbs)were generated by amplification and cloning of these HA-specific B cells.First,all human mAbs were screened for binding activity by enzyme-linked immunosorbent assay.Then,those mAbs,exhibiting potent affinity to recognize H7 HAs were further evaluated by hemagglutination-inhibiting(HAI)and microneutralizationin vitro assays.Finally,the lead mAb candidate was selected and tested against the lethal challenge of the H7N9 virus using murine models.Results:The mAb 6-137 was able to recognize a panel of H7 HAs with high affinity but not HA of other subtypes,including H1N1 and H3N2.The mAb 6-137 can efficiently inhibit the HA activity in the inactivated H7N9 virus and neutralize 100 tissue culture infectious dose 50(TCID_(50))of H7N9 virus(influenza A/Nanjing/1/2013)invitro,with neutralizing activity as low as 78 ng/mL.In addition,the mAb 6-137 protected the mice against the lethal challenge of H7N9 prophylactically and therapeutically.Conclusion:The mAb 6-137 could be an effective antibody as a prophylactic or therapeutic biological treatment for the H7N9 exposure or infection. | Jingxin Li Li Zhang Linlin Bao Yuxiao Wang Lin Qiu Jialei Hu Rong Tang Huiyan Yu Jun Shan Yan Li Chuan Qin Fengcai Zhu | 2022 | Chinese Medical Journal2022，，7： | 1 |
| 4 | The Infection of Healthcare Workers and the Reinfection of Patients by Omicron Variant—Jiangsu Province,China,December 2022 to January 2023显示文摘Summary What is already known about this topic?Healthcare workers(HCWs)and previously infected patients(PIPs)may experience a wave of epidemic following the modification of the country’s coronavirus disease(COVID)-zero policy in China.What is added by this report?As of early January 2023,the initial wave of the COVID-19 pandemic among HCWs had effectively subsided,with no statistically significant differences observed in infection rates compared to those of their co-occupants.The proportion of reinfections among PIPs was relatively low,particularly in those with recent infections.What are the implications for public health practice?Medical and health services have resumed normal operations.For patients who have recently experienced severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infections,appropriate relaxation of policies may be considered. | Chuanmeng Zhang Ting Guo Lei Zhang Aiqin Gu Jun Ye Mei Lin Ming Chu Fengcai Zhu Li Zhu | 2023 | China CDC weekly2023，5，18： | 0 |
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