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Dongke Wang,Chaofan Duan,Xiaohao Zhang,Junying Xu,Xiaohua Hou,Xuelian Xiang 대한소화기 기능성질환∙운동학회 2022 Journal of Neurogastroenterology and Motility (JNM Vol.28 No.4
Background/Aims Lyon consensus differentiates acid exposure time (AET) as physiological, borderline, and pathological. Mean nocturnal baseline impedance (MNBI) and post-reflux swallow-induced peristaltic wave index (PSPWi) are believed to increase diagnostic yield of gastroesophageal reflux disease (GERD) and correlate with symptom outcome of proton pump inhibitor (PPI) treatment. We aim to explore the clinical characteristics and the correlation of pH-impedance parameters with PPI response in Chinese patients with different AET levels. Methods We retrospectively investigated 177 patients with typical reflux symptoms who received esophageal function tests. The demographics, GERD questionnaire scores, the proportion of esophagitis and PPI responders, and manometric and pH-impedance parameters were compared among patients with AET < 4%, 4-6%, and > 6%. In patients with AET ≥ 4%, manometric and pH-impedance parameters were compared between PPI responders and non-responders. Results Among 177 patients, 69 (39.0%) had AET 4-6%, and 53 (29.9%) had AET > 6%. The demographics, esophagogastric junction type, and occurrence of ineffective esophageal motility were similar between patients with AET 4-6% and > 6%, but different from AET < 4%. MNBI and PSPWi were different among different AET levels, but similar between PPI responders and non-responders in patients with AET ≥ 4%. Conclusions It is reasonable to set 4% as a threshold to define pathological AET in Chinese patients. MNBI and PSPWi could identify GERD patients, but may not correlate with PPI response of Chinese GERD patients.
Dongke Lv,Yuqi Wang,Li Jia 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.7
Using the static chamber method, CO2 flux across the water-air interface of Xiquanyan reservoir was measured for 24 hours over a one-year cycle in Harbin, China. Gas ebullition and gas emission in winter was not considered in this study. CO2 fluxes showed significant spatial-temporal differentiation. The order of CO2 flux in each test point was: A> C> D> B. The changes of water level and hydro-fluctuation zone and the distribution of aquatic plants were the main factors affecting the spatial variation of CO2 flux. In terms of time, carbon flux of daytime in Xiquanyan was significantly lower than the night. Overall, seasonal variations of CO2 flux was: spring> autumn> summer.
Forecasting on Ecological Security of Zhalong Wetland Nature Reserve based on Gray Theory
Yuqi Wang,Dongke Lv,Zhenglin Sun 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.8
Based on field survey data and statistics of Zhalong wetland natural reserve, gray correlation model was used to comprehensively analyze and forecast ecological security of zhalong. According to “Response -Pressure - State" model, a eco-security assessment system was built which contains 32 indictors such as human activities, regional development index, etc. The results showed that: Zhalong Wetland ecological security index varied from 0.6852-0.7951 from 2015-2022. The index of ecological security alternated "safer" from "early warning". Upward trend of ecological security benefited from implementation of policies from the response subsystem.
Yuqi Wang,Dongke Lv,Zhenglin Sun 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
According to “Pressure - State – Response” model, an eco-security assessment system was built which contains 32 indictors such as human activities, regional development index, etc. The results showed that: ecological security index of Zhalong Wetland Nature Reserve, appeared upward trend after the first drop in overall, but were all in warning category from 2007 to 2012. As for subsystem level, since 2007, pressure subsystem showed worsening trend, while the state and response subsystem appeared signs of improvement.