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Soil Respiration as an Environmental Indicator of Human Impacts
TANAKA, Haruo,SAKAGAMI, Kan-ichi,HAMADA, Ryunosuke,SUZUKI, Kimitake,SATO, Miyoko 경희대학교 지구환경연구소 1998 국제세미나 Vol.1998 No.-
Soil respiration represents as an environmental indicator of human impacts. Field soil respiration is considered a good indicator if conducted with several replications and for long term monitoring. Potential soil respiration acts as a unique environmental indicator of human impacts. Decrease of potential soil respiration reflects the decline of the organic matter by human impacts.
Hyperfractionated radiotherapy for re-irradiation of recurrent esophageal cancer
Kazuya Takeda,Haruo Matsushita,Rei Umezawa,Takaya Yamamoto,Yojiro Ishikawa,Noriyoshi Takahashi,Yu Suzuki,Keiichi Jingu 대한방사선종양학회 2021 Radiation Oncology Journal Vol.39 No.4
Purpose: Re-irradiation is a treatment option for recurrent esophageal cancer patients with a history of radiotherapy, but there is a risk of severe late adverse effects. This study focused on the efficacy and safety of re-irradiation using hyperfractionated radiotherapy. Materials and Methods: Twenty-six patients who underwent re-irradiation by the hyperfraction technique using twice-daily irradiation of 1.2 Gy per fraction for recurrent esophageal cancer were retrospectively included in this study. The overall survival period after the start of secondary radiotherapy and the occurrence of late adverse effects were investigated. Results: Of 26 patients, 21 (81%) received re-irradiation with definitive intention and 21 (81%) underwent concurrent chemotherapy. The median re-irradiation dose was 60 Gy in 50 fractions in 25 treatment days, and the median accumulated irradiation dose in equivalent dose in 2 Gy per fraction was 85.4 Gy with an α/β value of 3. The median interval between two courses of radiotherapy was 21.0 months. The median overall survival period was 15.8 months and the 1-year and 3-year overall survival rates were 64.3% and 28.3%, respectively. Higher dose of re-irradiation and concurrent chemotherapy significantly improved survival (p < 0.001 and p = 0.019, respectively). Severe late adverse effects with the Common Terminology Criteria for Adverse Events grade 3 or higher were observed in 5 (19.2%) patients, and 2 (7.7%) of them developed a grade 5 late adverse effect. Conclusion: High-dose re-irradiation using a hyperfractionated schedule with concurrent chemotherapy might be related to good prognosis, while the rate of late severe adverse effects is not high compared with the rates in past reports.
Dulal Chandra,Toshiyuki Matsui,Haruo Suzuki,Yusuke Kosugi,Koichi Fujimura 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.2
The changes in ammonia content as well as activity and gene expression of glutamate dehydrogenase (GDH; EC 1.4.1.2) were investigated in lettuce during storage. GDH amination activity increased with the increases in ammonia content in the outer leaf portion after 24 h of storage. GDH amination activity was substantially higher than deamination activity. The isolated partial cDNA clone referred to as LsGDH (Lactuca sativa glutamate dehydrogenase; AB334207) consisted of 757 nucleotides and was highly homologous with the GDH genes of other plants. Although the transcript of LsGDH was found in both the outer and inner leaves, the level of transcript gradually increased in the outer leaves with the progress of storage, but was only expressed in the inner leaves when higher enzyme activity was observed. Results suggest that GDH expression in lettuce is controlled by tissue specific manner and/or multiple levels of regulations. The changes in ammonia content as well as activity and gene expression of glutamate dehydrogenase (GDH; EC 1.4.1.2) were investigated in lettuce during storage. GDH amination activity increased with the increases in ammonia content in the outer leaf portion after 24 h of storage. GDH amination activity was substantially higher than deamination activity. The isolated partial cDNA clone referred to as LsGDH (Lactuca sativa glutamate dehydrogenase; AB334207) consisted of 757 nucleotides and was highly homologous with the GDH genes of other plants. Although the transcript of LsGDH was found in both the outer and inner leaves, the level of transcript gradually increased in the outer leaves with the progress of storage, but was only expressed in the inner leaves when higher enzyme activity was observed. Results suggest that GDH expression in lettuce is controlled by tissue specific manner and/or multiple levels of regulations.
Fujiwara, Yumiko,Kobayashi, Haruo,Kawai, Shigenao,Suzuki, Koichi Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.1
Extracts of adult worker bodies of Vespa simillima in 2 % NaCl or acidified methanol were administered orally to mice for 70 days. Following this period, memory at one-day and one-month periods, and the effects on scopolamine-induced amnesia were examined using a step-through passive avoidance task. Changes in MK-801-induced disability after 8 days of training, and in memory one month after the trial were also assessed. Mice treated with the 2% NaCl extract showed significant improvement in memory in the behavioral tests one month after the trial, whereas mice receiving the extract in acidified methanol, did not differ from the controls in any trial. The results inidicate that Vespa simillima contains substances acting favorably on the cerebral functions of mammals.
Dulal Chandra,Toshiyuki Matsui,Haruo Suzuki,Yusuke Kosugi 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.2
The quality of harvested perishable products greatly depends on temperatures during transport and storage or market display. In this study, we evaluated the influence of low temperature and duration of storage on the storage quality in iceberg lettuce that were kept at 1±0.2℃ for 0 (control), 1 and 2 weeks and subsequently exposed to 20±2℃ for 10 days. Lettuce heads with prior storage at 1℃ for 1 or 2 weeks showed higher visual quality and lower level of wilting as compared to the control sample until 4 days of storage at 20℃. However, higher butt discoloration ratings were observed for 1 or 2-week stored samples. Higher hue angle value was observed in the 1-week sample until 4 days of storage as compared to the control or 2-week samples. No significant difference in textural quality was found between the control and 1℃ stored samples. In general, 1-week sample exhibited slightly higher puncture force and breaking energy value as compared with the control and 2-week samples. At the end of the storage, soluble sugar content declined by 52, 45 and 54% in the outer leaves and 70, 62 and 65% in the inner leaves of the control, 1 and 2-week stored samples, respectively. The heads with prior storage at 1℃ for 1 week showed a little higher sugar contents than those with 2-week or the control samples. In general, the outer leaves contained higher amount of sucrose, whereas the inner leaves contained higher amount of glucose and fructose. Although citric acid was found in trace amount, malic acid was the main component in organic acid fractions. Results suggest that iceberg lettuce could be stored at 1℃ for 2 weeks without affecting quality and that a better quality could be maintained at 20℃ with prior storage at 1℃ than continuous storage at 20℃.
Chandra, Dulal,Matsui, Toshiyuki,Suzuki, Haruo,Kosugi, Yusuke,Fujimura, Koichi 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.2
The changes in ammonia content as well as activity and gene expression of glutamate dehydrogenase (GDH; EC 1.4.1.2) were investigated in lettuce during storage. GDH amination activity increased with the increases in ammonia content in the outer leaf portion after 24 h of storage. GDH amination activity was substantially higher than deamination activity. The isolated partial cDNA clone referred to as LsGDH (Lactuca sativa glutamate dehydrogenase; AB334207) consisted of 757 nucleotides and was highly homologous with the GDH genes of other plants. Although the transcript of LsGDH was found in both the outer and inner leaves, the level of transcript gradually increased in the outer leaves with the progress of storage, but was only expressed in the inner leaves when higher enzyme activity was observed. Results suggest that GDH expression in lettuce is controlled by tissue specific manner and/or multiple levels of regulations.