Pub Date : 2019-12-01Epub Date: 2019-08-11DOI: 10.1111/nmo.13703
Elizabeth Barba, Borja Sánchez, Emanuel Burri, Anna Accarino, Eva Monclus, Isabel Navazo, Francisco Guarner, Abelardo Margolles, Fernando Azpiroz
Background: Some patients complain that eating lettuce, gives them gas and abdominal distention. Our aim was to determine to what extent the patients' assertion is sustained by evidence.
Methods: An in vitro study measured the amount of gas produced during the process of fermentation by a preparation of human colonic microbiota (n = 3) of predigested lettuce, as compared to beans, a high gas-releasing substrate, to meat, a low gas-releasing substrate, and to a nutrient-free negative control. A clinical study in patients complaining of abdominal distention after eating lettuce (n = 12) measured the amount of intestinal gas and the morphometric configuration of the abdominal cavity in abdominal CT scans during an episode of lettuce-induced distension as compared to basal conditions.
Key results: Gas production by microbiota fermentation of lettuce in vitro was similar to that of meat (P = .44), lower than that of beans (by 78 ± 15%; P < .001) and higher than with the nutrient-free control (by 25 ± 19%; P = .05). Patients complaining of abdominal distension after eating lettuce exhibited an increase in girth (35 ± 3 mm larger than basal; P < .001) without significant increase in colonic gas content (39 ± 4 mL increase; P = .071); abdominal distension was related to a descent of the diaphragm (by 7 ± 3 mm; P = .027) with redistribution of normal abdominal contents.
Conclusion and inferences: Lettuce is a low gas-releasing substrate for microbiota fermentation and lettuce-induced abdominal distension is produced by an uncoordinated activity of the abdominal walls. Correction of the somatic response might be more effective than the current dietary restriction strategy.
{"title":"Abdominal distension after eating lettuce: The role of intestinal gas evaluated in vitro and by abdominal CT imaging.","authors":"Elizabeth Barba, Borja Sánchez, Emanuel Burri, Anna Accarino, Eva Monclus, Isabel Navazo, Francisco Guarner, Abelardo Margolles, Fernando Azpiroz","doi":"10.1111/nmo.13703","DOIUrl":"10.1111/nmo.13703","url":null,"abstract":"<p><strong>Background: </strong>Some patients complain that eating lettuce, gives them gas and abdominal distention. Our aim was to determine to what extent the patients' assertion is sustained by evidence.</p><p><strong>Methods: </strong>An in vitro study measured the amount of gas produced during the process of fermentation by a preparation of human colonic microbiota (n = 3) of predigested lettuce, as compared to beans, a high gas-releasing substrate, to meat, a low gas-releasing substrate, and to a nutrient-free negative control. A clinical study in patients complaining of abdominal distention after eating lettuce (n = 12) measured the amount of intestinal gas and the morphometric configuration of the abdominal cavity in abdominal CT scans during an episode of lettuce-induced distension as compared to basal conditions.</p><p><strong>Key results: </strong>Gas production by microbiota fermentation of lettuce in vitro was similar to that of meat (P = .44), lower than that of beans (by 78 ± 15%; P < .001) and higher than with the nutrient-free control (by 25 ± 19%; P = .05). Patients complaining of abdominal distension after eating lettuce exhibited an increase in girth (35 ± 3 mm larger than basal; P < .001) without significant increase in colonic gas content (39 ± 4 mL increase; P = .071); abdominal distension was related to a descent of the diaphragm (by 7 ± 3 mm; P = .027) with redistribution of normal abdominal contents.</p><p><strong>Conclusion and inferences: </strong>Lettuce is a low gas-releasing substrate for microbiota fermentation and lettuce-induced abdominal distension is produced by an uncoordinated activity of the abdominal walls. Correction of the somatic response might be more effective than the current dietary restriction strategy.</p>","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"18 1","pages":"e13703"},"PeriodicalIF":3.5,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/nmo.13703","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74784260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0407-X
Cong Lu, Jianchun Guo
{"title":"Computation model of proppant embedment depth based on dimensional analysis","authors":"Cong Lu, Jianchun Guo","doi":"10.1007/S12404-013-0407-X","DOIUrl":"https://doi.org/10.1007/S12404-013-0407-X","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"483-487"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0407-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53166879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0420-0
Sen Yu, Mingyong Wang
{"title":"A practical framework for scenario-based optimal decision-making on water-deficient river ecological restoration in mining areas","authors":"Sen Yu, Mingyong Wang","doi":"10.1007/S12404-013-0420-0","DOIUrl":"https://doi.org/10.1007/S12404-013-0420-0","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"566-572"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0420-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53168099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0417-8
Zhong Chen, Zhenghua Dai, Fuchen Wang
{"title":"Simulation analysis of ammonia distribution in methanol production from coal water slurry gasification","authors":"Zhong Chen, Zhenghua Dai, Fuchen Wang","doi":"10.1007/S12404-013-0417-8","DOIUrl":"https://doi.org/10.1007/S12404-013-0417-8","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"546-553"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0417-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53167601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0404-0
X. Feng, D. Duan, Q. Tian, Kai Wang, Li-bin Liu
{"title":"Damage, failure and stability control of evolutionary process caused by re-exploitation of the residual resources","authors":"X. Feng, D. Duan, Q. Tian, Kai Wang, Li-bin Liu","doi":"10.1007/S12404-013-0404-0","DOIUrl":"https://doi.org/10.1007/S12404-013-0404-0","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"462-467"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0404-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53167199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0410-2
Feng-chun Cai, Zegong Liu, Yi Luo
{"title":"Current situation of simultaneous coal and methane extraction technology in pressure-relieved coalbed group","authors":"Feng-chun Cai, Zegong Liu, Yi Luo","doi":"10.1007/S12404-013-0410-2","DOIUrl":"https://doi.org/10.1007/S12404-013-0410-2","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"500-506"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0410-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53167101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0416-9
B. Ma, Xiaosu Zhu, Wen-Bo Li, Xiao-jing Zhang, Shufeng Du
{"title":"Study on reaction characteristics of phenolic hydroxyl in coal by using the model compound during direct coal liquefaction","authors":"B. Ma, Xiaosu Zhu, Wen-Bo Li, Xiao-jing Zhang, Shufeng Du","doi":"10.1007/S12404-013-0416-9","DOIUrl":"https://doi.org/10.1007/S12404-013-0416-9","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"540-545"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0416-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53167575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0401-3
D. M. Patadiya, S. Jaisankar, T. Sheshadri
{"title":"Detonation initiated disintegration of coal particle due to the maximum strain energy theory","authors":"D. M. Patadiya, S. Jaisankar, T. Sheshadri","doi":"10.1007/S12404-013-0401-3","DOIUrl":"https://doi.org/10.1007/S12404-013-0401-3","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"435-440"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0401-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53166389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1007/S12404-013-0411-1
Yaodong Jiang, Tao Wang, Yi-xin Zhao, Wenjuan Wang
{"title":"Experimental study on the mechanisms of fault reactivation and coal bumps induced by mining","authors":"Yaodong Jiang, Tao Wang, Yi-xin Zhao, Wenjuan Wang","doi":"10.1007/S12404-013-0411-1","DOIUrl":"https://doi.org/10.1007/S12404-013-0411-1","url":null,"abstract":"","PeriodicalId":57320,"journal":{"name":"Journal of Coal Science EngineeringChina","volume":"19 1","pages":"507-513"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/S12404-013-0411-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53167738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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