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Aerosol model evaluation using two geostationary satellites over East Asia in May 2016
Goto, Daisuke,Kikuchi, Maki,Suzuki, Kentaroh,Hayasaki, Masamitsu,Yoshida, Mayumi,Nagao, Takashi M.,Choi, Myungje,Kim, Jhoon,Sugimoto, Nobuo,Shimizu, Atsushi,Oikawa, Eiji,Nakajima, Teruyuki Elsevier 2019 Atmospheric research Vol.217 No.-
<P><B>Abstract</B></P> <P>This study newly applies measurements from two geostationary satellites, the Advanced Himawari Imager (AHI) onboard the geostationary satellite Himawari-8 and the Geostationary Ocean Color imager (GOCI) onboard the geostationary satellite COMS, to evaluate a unique regional aerosol-transport model coupled to a non-hydrostatic icosahedral atmospheric model (NICAM) at a high resolution without any nesting technique and boundary conditions of the aerosols. Taking advantage of the unique capability of these geostationary satellites to measure aerosols with unprecedentedly high temporal resolution, we focus on a target area (115°E-155°E, 20°N-50°N) in East Asia in May 2016, which featured the periodic transport of industrial aerosols and a very heavy aerosol plume from Siberian wildfires. The aerosol optical thickness (AOT) fields are compared among the AHI, GOCI, MODIS, AERONET and NICAM data. The results show that both AHI- and GOCI-retrieved AOTs were generally comparable to the AERONET-retrieved ones, with high correlation coefficients of approximately 0.7 in May 2016. They also show that NICAM successfully captured the detailed horizontal distribution of AOT transported from Siberia to Japan on the most polluted day (18 May 2016). The monthly statistical metrics, including correlation between the model and either AHI or GOCI, are estimated to be >0.4 in 42–49% of the target area. With the aid of sensitivity model experiments with and without Siberian wildfires, it was found that a long-range transport of aerosols from Siberian wildfires (from as far as 3000 km) to Japan influenced the monthly mean aerosol levels, accounting for 7–35% of the AOT, 26–49% of the surface PM2.5 concentrations, and 25–66% of the aerosol extinction above 3 km in height over Japan. Therefore, the air pollutants from Siberian wildfire cannot be ignored for the spring over Japan.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A high resolution model generally produces an observed aerosol distribution. </LI> <LI> Next-generation geostationary satellites are applied for aerosol model evaluation. </LI> <LI> Multiple measurement helped to understand the 4-dimensional aerosol structure. </LI> <LI> Siberian wildfires strongly affected the aerosol levels over Japan in May 2016. </LI> </UL> </P>
장윤아,Eiji Goto,Yasuhiro Ishigami,문보흠,전창후 한국원예학회 2011 Horticulture, Environment, and Biotechnology Vol.52 No.4
Healing and acclimatization are key processes for the survival of grafted plants. This study evaluated the influence of light intensity (photosynthetic photon flux, PPF) and relative humidity during the healing and acclimatization period on the photosynthetic characteristics, graft-take, and growth of grafted cucumber (Cucumis sativus L.) seedlings, using a system for the continuous measurement of the CO_2 exchange rate, in order to establish optimum environmental conditions for the healing and acclimatization of grafted cucumbers seedlings. Cucumbers (Cucumis sativus L. cv. Joeun Baekdadaki) were grafted onto rootstocks (Cucurbita maxima D. × C. moshata D. cv. New Shintozwa). Six combinations of two levels of relative humidity (95 and 90%) and three levels (0, 142, and 237 μmol・m^(-2)・s^(-1)) of light intensity were set up during healing and acclimatization. Increasing light intensity significantly increased CO_2 exchange rates during healing and acclimatization. At 95 and 90%relative humidity, the CO_2 exchange rates at 237 μmol・m^(-2)・s^(-1) light intensity were 1.5 and 1.8 times higher than those at 142 μmol・m^(-2)・s^(-1) light intensity, respectively. The light intensity during healing and acclimatization also affected the amount and distribution of chloroplasts in scion cotyledon. The amount of chloroplasts increased with the increase of PPF during healing and acclimatization, which covered most of cell wall with little open space left, compared with that of dark condition. As PPF increased, the shoot length, ratio of shoot to root, and specific leaf area decreased but the hypocotyl diameter, leaf area, dry weight, and percent dry matter increased. On the other hand, the relative humidity ranging from 90 to 95% did not significantly affect the CO_2 exchange rates during healing, acclimatization, and growth of grafted cucumber seedlings. As a result, PPF during healing and acclimatization affected the growth and quality of grafted cucumber seedlings. This showed that higher PPF condition may improve the growth and quality of grafted cucumber seedlings.
MARCH-I: a New Regulator of Dendritic Cell Function
Satoshi Ishido,Yohei Matsuki,Eiji Goto,Mizuho Kajikawa,Mari Ohmura-Hoshino 한국분자세포생물학회 2010 Molecules and cells Vol.29 No.3
We and other groups have demonstrated that the expres-sion level of MHC class II (MHC II) is regulated through ubiquitination of the MHC II chain. We also reported that MARCH-I, an E3 ubiquitin ligase, is critical for this process. At present, however, the importance of MARCH-I-mediated MHC II regulation in vivo is still unknown. In this review, we will summarize recent advances in our understanding of MARCH-I-mediated MHC II ubiquitination, and discuss how we can overcome the difficulties inherent in these studies.
손기호,Mizuki Ide,Eiji Goto 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.2
We determined the eff ects of UV radiation and low root zone temperature on growth characteristics and phytochemicalsof Brassica napus (canola) cultivated in a controlled environment (25/20 °C 16/8 [light/dark]; 70% relative humidity;1000 μmol mol −1 CO 2 with photosynthetic photon fl ux density of 100 and 200 μmol m −2 s −1 for 7 and 18 days, respectively). The 18-day-old B. napus plants were treated for 5 days with two nutrient solution–temperature regimes (normal temperature[NT] and low-temperature [10 °C; LT]) and three levels of UV radiation (0, 0.3, and 0.6 W m −2 ). Treatment with 0.6 W m −2UV decreased quantum effi ciency of photosystem II the most. Most growth characteristics decreased under LT + UV treatments. Treatments with 0.6 W m −2 UV, compared to those without UV, signifi cantly inhibited shoot height. LT + 0.3 and+0.6 UV decreased shoot height the most. Temperature (T) × UV interaction did not aff ect most growth characteristics exceptleaf area, specifi c leaf weight, and shoot water content. Antioxidant capacity (total ORAC) resembled lipophilic ORAC andshowed the highest value in the LT + 0.6 UV treatment. T × UV interaction did not aff ect ORAC values, although LT +0.3 UV and LT + 0.6 UV treatments produced the highest values. Both LT and UV radiation enhanced the total phenoliccontent, and in the combined treatments, it was two times that of the control. UV intensities (0.3 and 0.6 W m −2 ) remainedconstant regardless of variation in root zone temperature. UV radiation enhanced total fl avonoid content equally across differentintensities; LT + 0.6 W m −2 UV treatment produced a relatively high value. Thus, LT and UV negatively aff ected plantgrowth parameters, except total dry weight, whereas LT, UV, or LT + UV positively aff ected antioxidant properties, totalphenolics, and fl avonoids, suggesting the potential of using an LT treatment in a hydroponic system as well as UV radiationto enhance growth performance of greenhouse and factory plants.
MARCH-I: a New Regulator of Dendritic Cell Function
Ishido, Satoshi,Matsuki, Yohei,Goto, Eiji,Kajikawa, Mizuho,Ohmura-Hoshino, Mari Korean Society for Molecular and Cellular Biology 2010 Molecules and cells Vol.29 No.3
We and other groups have demonstrated that the expression level of MHC class II (MHC II) is regulated through ubiquitination of the MHC II ${\beta}$ chain. We also reported that MARCH-I, an E3 ubiquitin ligase, is critical for this process. At present, however, the importance of MARCH-I-mediated MHC II regulation in vivo is still unknown. In this review, we will summarize recent advances in our understanding of MARCH-I-mediated MHC II ubiquitination, and discuss how we can overcome the difficulties inherent in these studies.