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| 1 | Effect of ozone injection on the long-term performance and microbial community structure of a VOCs biofilter显示文摘For biofilters treating waste gases containing volatile organic compounds(VOCs), biomass accumulation is a common problem which will induce bed clogging and significant decrease in VOCs removal efficiency during long-term operation. In this study, ozone injection was developed as a biomass control strategy, and its effects on the biofilter performance and the microbial community structure were investigated in long-term operation. Two biofilters,identified as BF1 and BF2, were operated continuously for 160 days treating gaseous toluene under the same conditions, except that 200 mg/m3 ozone was continuously injected into BF1 during days 45–160. During the operation period, ozone injection did not change the toluene removal efficiency, while the pressure drop of BF1 with ozone injection was significantly lowered compared with BF2. The wet biomass accumulation rate of BF1 was 11 g/m^3/hr, which was only46% of that in BF2. According to the carbon balance result, ozone injection also increased the toluene mineralization rate from 83% to 91%, which could be an important reason for the low biomass accumulation. The PMA-q PCR result indicated that ozone injection increased the microbial viability of the biofilm. The high-throughput sequencing result also revealed that the dominant phyla and genera were not changed significantly by ozone injection, but some ozonetolerant genera such as Rhodanobacter, Dokdonella and Rhodococcus were enhanced by ozone exposure. All the results verified that ozone injection is capable of sustaining the long-term performance of biofilters by lowering the biomass accumulation, increasing the microbial viability and changing the microbial community structure. | Prakit Saingam Zenab Baig Yang Xu Jinying Xi | 2018 | Journal of Environmental Sciences2018，30，7： | 4 |
| 2 | Drinking-smoking status and health risk behaviors among high school students in Thailand显示文摘 | Saingam D Assanangkornchai S Geater AF | 2012 | J Drug Educ2012，42，2： | 1 |
| 3 | Effect of continuous ozone injection on performance and biomass accumulation of biofilters treating gaseous toluene显示文摘 | Jinying Xi Prakit Saingam Feng Gu Hong-Ying Hu Xuefei Zhao | 2015 | Applied Microbiology and Biotechnology2015，，1： | 1 |
| 4 | Anticancer activity of Δ^(9)-tetrahydrocannabinol and cannabinol in vitro and in human lung cancer xenograft显示文摘Objective:To investigate the effects of Δ^(9)-tetrahydrocannabinol,the principal psychoactive compound of Cannabis sativa,and cannabinol,a Δ^(9)-tetrahydrocannabinol degradative product,on human non-small cell lung cancer cells.Methods:Δ^(9)-Tetrahydrocannabinol and cannabinol were tested for anticancer activity in human non-small cell lung cancer(A549)cells.The effects on cell proliferation,apoptosis,and phosphorylation profiles were examined.The effects of Δ^(9)-tetrahydrocannabinol and cannabinol on tumor growth were also investigated using a xenograft nude mouse model.Apoptosis and targeted phosphorylation were verified by immunohistochemistry.Results:Δ^(9)-Tetrahydrocannabinol and cannabinol significantly inhibited cell proliferation and increased the number of apoptotic cells in a concentration-dependent manner.The Δ^(9)-tetrahydrocannabinol-and cannabinol-treated cells had lower levels of phosphorylated protein kinase B[AKT(S473)],glycogen synthase kinase 3 alpha/beta,and endothelial nitric oxide synthase compared to the controls.The study of xenograft mice revealed that tumors treated with 15 mg/kg Δ^(9)-tetrahydrocannabinol or 40 mg/kg cannabinol were significantly smaller than those of the control mice.The tumor progression rates in mice treated with 15 mg/kg Δ^(9)-tetrahydrocannabinol or 40 mg/kg cannabinol were significantly slower than in the control group.Conclusions:These findings indicate that Δ^(9)-tetrahydrocannabinol and cannabinol inhibit lung cancer cell growth by inhibiting AKT and its signaling pathways,which include glycogen synthase kinase 3 alpha/beta and endothelial nitric oxide synthase. | Surang Leelawat Kawin Leelawat Thaniya Wannakup Worawan Saingam Nanthaphong Khamthong Fameera Madaka Athip Maha Patamaporn Pathompak Lukman Sueree Thanapat Songsak | 2022 | Asian Pacific Journal of Tropical Biomedicine2022，12，8： | 0 |
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