• Title/Summary/Keyword: APHP

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Alkaline Phosphatase Activity and Phosphatase Hydrolyzable Phosphorus for Phytoplankton in Hiroshima Bay, Japan

  • Oh, Seok-Jin;Yoon, Yang-Ho;Yamamoto, Tamiji;Matsuyama, Yukihiko
    • Ocean Science Journal
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    • v.40 no.4
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    • pp.183-190
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    • 2005
  • We investigated the seasonal variability of tree alkaline phosphatase activity in seawater and alkaline phosphatase hydrolysable phosphorus (APHP) at 3 stations in Hiroshima Bay using alkaline phosphatase extracted from the dinoflagellates Alexandrium tamarense and Gymnodinium catenatum. The dissolved inorganic phosphorus (DIP) was lower than $1\;{\mu}M$ all samples; the lowest values were in May. The amount of APHP was high at the surface and bottom waters of all stations in May, showing DIP-depleted conditions. In August and November, the amount of APHP was much less than the amount of APHP in May, indicating that the availability of dissolved organic phosphorus (DOP) for these species was low and/or uptake during the dinoflagellate blooming might have occurred in the area. The results obtained from short-term variations of AP activity might suggest that the growth of dinoflagellates in this season may be partly supported by the AP produced by other diatoms.

Distribution Characteristics of Alkaline Phosphatase Activity and Phosphatase Hydrolyzable Phosphorus in Northern Gamak Bay in Autumn and Winter, 2009 (2009년 추계와 동계 가막만 북부해역에서 alkaline phosphatase 활성과 phosphatase 가수 분해성 인의 분포 특성)

  • Kwon, Hyeong-Kyu;Oh, Seok-Jin;Yang, Han-Soeb
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.43 no.5
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    • pp.540-546
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    • 2010
  • We investigated variations in alkaline phosphatase (APase) activity and alkaline phosphatase hydrolyzable phosphorus (APHP) in northern Gamak Bay from September to December 2009. Dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) decreased gradually, and the DIN/DIP ratio was higher than the Redfield ratio (16) based on molecular concentrations during most of the observation period. The total APase (T-APase) activity increased with decreasing DIP concentration; i.e., the Relationship between T-APase and DIP showed a high negative correlation (r=-0.80, P<0.001), with APase activity being a good indicator of DIP limiting the Redfield ratio. The T-APase was positively correlated with the concentration of chlorophyll a (r=0.73, P<0.001). This suggests that a major portion of APase activity in northen Gamak Bay seawater is attributed to phytoplankton. The proportion of APHP among dissolved organic phosphorus (DOP) was low in September and high in November. Thus, APase-producing phytoplankton may be able to grow by utilizing APHP as a phosphorus source in autumn when DIP is limiting. Thus, APase activity and the use of DOP by phytoplankton may play an important role in the growth of phytoplankton under DIP limiting conditions such as those of northern Gamak Bay.

Anomalous Phenomena on Subthreshold Characteristics of SOI MOSFET Back Gate Voltage

  • Lee, Seung-Min;Lee, Mike-Myung-Ok
    • Proceedings of the IEEK Conference
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    • 1998.10a
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    • pp.553-556
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    • 1998
  • The 1-D numerical model and its extraction methodology are suggested and these simulation results for the S-swing as a function of back-gate voltage are well matched with the measured. S-swing characteristics are analyzed using PD-SOI devices with enough deeper regions up to substrates. The PD-SOI device doesn't have to be short channel to see the anomalous subthreshold phenomena based on the back gate bias. This results recommend to operate better SOI device performances by controlling the back gate voltages. So SOI performances will be much optimistic with proper control of the back-gate voltage for the already- proven- high- performance (APHP) SOI VLSIs.

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Laparoscopy of hepatocellular carcinoma is helpful in minimizing intra-abdominal adhesion during salvage transplantation

  • Rhu, Jinsoo;Kim, Jong Man;Choi, Gyu Seong;Kwon, Choon Hyuck David;Joh, Jae-Won;Soubrane, Olivier
    • Annals of Surgical Treatment and Research
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    • v.95 no.5
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    • pp.258-266
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    • 2018
  • Purpose: This study analyzes the impact of laparoscopic liver resection on intra-abdominal adhesion. Methods: Patients who underwent salvage liver transplantation after liver resection for hepatocellular carcinoma from January 2012 to October 2017 at our institution were included. Information about the severity of intra-abdominal adhesions was collected from a prospectively maintained database. Intra-abdominal adhesions were graded after the agreement of 2 surgeons who participated in the salvage liver transplantation based on predetermined criteria. Adhesion severity and demographic, operative, and postoperative data were compared between the laparoscopic group and the open group. Multivariate logistic regression was performed to consider potential factors related to severe adhesion during salvage transplantation. Results: Sixty-two patients who underwent salvage liver transplantation after liver resection were included in this study. Among them, 52 patients underwent open surgery, and 10 patients underwent laparoscopy. Adhesion was significantly more severe in the open group than in the laparoscopy group (P = 0.029). A multivariate logistic regression model including potential factors related to severe adhesion showed that laparoscopy (odds ratio, 0.168; 95% confidence interval, 0.029-0.970; P = 0.048) was the only significant factor. Conclusion: Laparoscopic liver resection for hepatocellular carcinoma can minimize intra-abdominal adhesion during salvage liver transplantation.

Effectiveness and Tolerance of a Locust Bean Gum-Thickened Formula: A Real-Life Study

  • Tounian, Patrick;Meunier, Leo;Speijers, Gerrit;Oozeer, Raish;Vandenplas, Yvan
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.23 no.6
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    • pp.511-520
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    • 2020
  • Purpose: Thickened infant formulas reduce regurgitation frequency and volume. Because the digestive tolerance of locust bean gum-containing formulas is controversial, the effectiveness and tolerance of a locust bean gum-thickened formula in infants presenting with regurgitation was evaluated. No other interventions were allowed during the 1 month follow-up period. Methods: We conducted an open, prospective, observational study of a locust bean gum-thickened formula administered to infants presenting with moderate to severe regurgitation according to parents during 1 month. Effectiveness and tolerance were assessed by evaluating gastrointestinal symptoms and quality of life indicators. Results: A total of 2,604 infants with an average age of 9.3±4.3 weeks were included in this 1 month trial. Regurgitation frequency and estimated volume decreased significantly (p<0.001) and the episodes were resolved completely in 48% of the infants. A significant decrease in duration of crying and episodes of gas (p<0.001), with improvement in quality of life parameters, was observed. Stool frequency increased and stool consistency softened (p<0.001) to levels within the physiologic range, consistent with the increased fiber load (0.42 g/100 mL). Conclusion: Locust bean gum-thickened formula decreased infant regurgitation, was well tolerated, and improved parental quality of life. Stool composition and frequency of the infants remained within the physiologic range.