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Yen-Yang Chen,Chen-Chi Wang,Ying-Cheng Lin,John Y Kao,Chun-Yi Chuang,Yung-An Tsou,Ja-Chih Fu,Sheng-Shun Yang,Chi-Sen Chang,Han-Chung Lien 대한소화기 기능성질환∙운동학회 2023 Journal of Neurogastroenterology and Motility (JNM Vol.29 No.1
Background/AimsHypopharyngeal multichannel intraluminal impedance-pH (HMII-pH) technology incorporating 2 trans-upper esophageal sphincter impedance channels has been developed to detect pharyngeal reflux. We used the HMII-pH technique to validate the candidate pharyngeal acid reflux (PAR) episodes based on the dual-pH tracings and determined the interobserver reproducibility. MethodsWe conducted a cross-sectional study in tertiary centers in Taiwan. Ninety patients with suspected laryngopharyngeal reflux and 28 healthy volunteers underwent HMII-pH test when off acid suppressants. Candidate PAR episodes were characterized by pharyngeal pH drops of at least 2 units and reaching a nadir pH of 5 within 30 seconds during esophageal acidification. Two experts manually independently identified candidate PAR episodes based on the dual-pH tracings. By reviewing the HMII-pH tracings, HMII-pH-proven PAR episodes were subsequently confirmed. The consensus reviews of HMII-pH-proven PAR episodes were considered to be the reference standard diagnosis. The interobserver reproducibility was assessed. ResultsA total of 105 candidate PAR episodes were identified. Among them 84 (80.0%; 95% CI, 71.0-87.0%) were HMII-pH-proven PAR episodes (82 in 16 patients and 2 in 1 healthy subject). Patients tended to have more HMII-pH-proven PAR episodes than healthy controls (median and percentile values [25th, 75th, and 95th percentiles]: 0 [0, 0, 3] vs 0 [0, 0, 0], P = 0.067). The concordance rate in diagnosing HMII-pH-proven PAR episodes between 2 independent observers was 92.2%. ConclusionOur preliminary data showed that 80.0% (71.0-87.0%) of the proposed candidate PAR episodes were HMII-pH-proven PAR episodes, among which the interobserver reproducibility was good.
The Photosynthesis Analysis in Different Wavelength LED Lighting Source on Plant Growth
( Chun-yu Tsai ),( Yi-yi Chen ),( Yung-fu Yen ),( Chyung Ay ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
The advancement in agriculture technology and stable environment control in plant factory. The demand of plant growth on the light is a major factor in addition to the nutrient solution. The different plant growth is also different for light wavelength. In this study, NFT (nutrient film technology) cultivation system was used in combination with plant factory, planting two varieties of Boston lettuce and Ziyan lettuce. The light source is the use of different wavelength include red、blue、green and yellow color to plant cultivation. Plant growth observed during plant analysis experiments and the use of photosynthesis analyzer with different CO2 concentrations and light intensity to observe the photosynthesis efficiency analysis. The preliminary experimental results show that the red wavelength of the photosynthetic efficiency had the highest efficiency under the single-source color LED planting. The analysis of the growth of single color LED light sources will be a relatively important reference for the mixing of different wavelength light and increasing the photosynthetic growth of plants.
Study on Photosynthesis Reaction of Plants at Different Light Wavelengths Mix Ratio under Low Power
( Chun-yu Tsai ),( Xin-yi Lin ),( Yung-fu Yen ),( Chyung Ay ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
The environmental factors such as light, carbon dioxide, temperature, and nutrition are very important and closely related to the stable control of plant growth in plant factories. However, how to configure the light source at different light wavelengths to increase the physiological response of chlorophyll is also a knowledge. In this study, Boston Lettuce and Red Lettuce (Ziyan) were used as samples and planted in the NFT (Nutrient Film Technology) cultivation system. The effects of different light wavelengths combination on photosynthesis were analyzed to find the optimal ratio of light sources. In addition, sample analysis was performed on these two plants to verify the correctness of the light wavelengths combination ratio. The preliminary results show that the green leaves Boston lettuce have the highest photosynthetic efficiency under the combination of the red wavelength (38.4 μmol) + blue wavelength (57.6 μmol) + green wavelength (24 μmol), while the red leaves Ziyan lettuce had the best photosynthetic efficiency under red wavelength (43.2 μmol) + blue wavelength (64.8 μmol) + yellow wavelength (12 μmol). At the end of the experiment, plant sample analysis will be performed using these two ratios of light wavelengths, verifying that the leaves of two different lettuces strains have its most suitable ratio of light wavelengths, allowing plants to grow efficiently, improve yield, quality and other advantages.