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Dang Q, Song M, Dang C, Zhan T, Zhang L. Experimental Study on Solidification Characteristics of Sessile Urine Droplets on a Horizontal Cold Plate Surface under Natural Convection. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7846-7857. [PMID: 35696680 DOI: 10.1021/acs.langmuir.2c01154] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
As the human excreta, urine is often used as one of the test materials in medical research due to its composition and content directly reflecting the health status of the body. Considering that the substances in urine may show different effects on its freezing process, solidification characteristics of sessile urine droplets on a horizontal cold plate surface under natural convection were experimentally investigated by comparing with those of water droplets under same conditions. To make the conclusion analysis more reasonable, the urine of a human without any diseases, especially metabolic diseases, was treated and used. The characteristics include nucleation location, dynamic variation of droplet color, and temperatures at different heights inside the droplet, and so forth. It was found that, similar to that of a water droplet, the solidification process of a urine droplet also experiences the following four stages: supercooling, recalescence, freezing, and cooling, in chronological order. Differently, the urine droplet changes from transparent to blur white at the supercooling stage due to the precipitation of inorganic salts. For nucleation locations, 46.67% cases are at the bottom, while others are at the top and middle of urine droplets. For a 10 μL droplet on a surface of -30 °C, urine has a 0.95 s freezing duration shorter than water, and a 5.31 °C lower phase-transition temperature. Results of this study are expected to reflect the content of substances in urine and thus provide references for urinalysis of patients with metabolic diseases.
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Affiliation(s)
- Qun Dang
- Department of Energy and Power Engineering, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Mengjie Song
- Department of Energy and Power Engineering, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Chaobin Dang
- Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan
| | - Tianzhuo Zhan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Long Zhang
- Department of Energy and Power Engineering, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
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Díaz-Anadón L, Cardo L, Santos F, Gil-Peña H. Evaluation of urinary acidification in children: Clinical utility. Front Pediatr 2022; 10:1051481. [PMID: 36389372 PMCID: PMC9660234 DOI: 10.3389/fped.2022.1051481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
The kidney plays a fundamental role in acid-base homeostasis by reabsorbing the filtered bicarbonate and by generating new bicarbonate, to replace that consumed in the buffering of non-volatile acids, a process that leads to the acidification of urine and the excretion of ammonium (NH4 +). Therefore, urine pH (UpH) and urinary NH4 + (UNH4 +) are valuable parameters to assess urinary acidification. The adaptation of automated plasma NH4 + quantification methods to measure UNH4 + has proven to be an accurate and feasible technique, with diverse potential indications in clinical practice. Recently, reference values for spot urine NH4 +/creatinine ratio in children have been published. UpH and UNH4 +, aside from their classical application in the study of metabolic acidosis, have shown to be useful in the identification of incomplete distal renal tubular acidosis (dRTA), an acidification disorder, without overt metabolic acidosis, extensively described in adults, and barely known in children, in whom it has been found to be associated to hypocitraturia, congenital kidney abnormalities and growth impairment. In addition, a low UNH4 + in chronic kidney disease (CKD) is a risk factor for glomerular filtration decay and mortality in adults, even in the absence of overt metabolic acidosis. We here emphasize on the need of measuring UpH and UNH4 + in pediatric population, establishing reference values, as well as exploring their application in metabolic acidosis, CKD and disorders associated with incomplete dRTA, including growth retardation of unknown cause.
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Affiliation(s)
- Lucas Díaz-Anadón
- Division of Pediatric Nephrology, Department of Pediatrics, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain.,Department of Medicine, Faculty of Medicine, University of Oviedo, Oviedo, Asturias, Spain
| | - Leire Cardo
- Clinical Biochemistry Department, Laboratory of Medicine, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
| | - Fernando Santos
- Department of Medicine, Faculty of Medicine, University of Oviedo, Oviedo, Asturias, Spain
| | - Helena Gil-Peña
- Division of Pediatric Nephrology, Department of Pediatrics, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain.,Department of Medicine, Faculty of Medicine, University of Oviedo, Oviedo, Asturias, Spain.,Section of Pediatrics, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
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Yudhana A, Mukhopadhyay S, Prima ODA, Akbar SA, Nuraisyah F, Mufandi I, Fauzi KH, Nasyah NA. Multi sensor application-based for measuring the quality of human urine on first-void urine. SENSING AND BIO-SENSING RESEARCH 2021. [DOI: 10.1016/j.sbsr.2021.100461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Xu P, Xu W, Gao S, Che Y, Zhao P, Lu S, Wang Y, Chen X, Zhang Q, Chen J, Zheng X, Huang G, He G, Liu X. Global metabolic profiling of hemorrhagic shock and resuscitation. Biomed Chromatogr 2021; 35:e5044. [PMID: 33283298 DOI: 10.1002/bmc.5044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/24/2020] [Accepted: 12/01/2020] [Indexed: 11/11/2022]
Abstract
Hemorrhagic shock (HS) is a medical emergency during trauma. Significant loss of tissue perfusion may result in cellular hypoxia, organ damage and death. The primary treatment of HS is control of the source of bleeding as soon as possible and fluid replacement (crystalloid solutions and blood transfusion). Metabolomics can identify novel biomarkers for various functional and organic diseases. Therefore, systematic exploration of the biological mechanisms of HS and blood transfusion enables the optimization of treatments for HS to reduce the occurrence of organ damage. In this study, a global metabolic profiling strategy is applied to evaluate metabolic changes in the HS rat model. A serum metabolic network with 58 significant metabolites was constructed for HS and resuscitation. Our investigation will offer insights into the pathogenesis.
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Affiliation(s)
- Ping Xu
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Wei Xu
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Songyan Gao
- Institute of Translation Medicine, Shanghai University, Shanghai, China.,Luodian Clinical Drug Research Centre, Institute for Translational Medicine Research, Shanghai University, Shanghai, China
| | - Yanting Che
- Institute of Translation Medicine, Shanghai University, Shanghai, China.,Luodian Clinical Drug Research Centre, Institute for Translational Medicine Research, Shanghai University, Shanghai, China
| | - Ping Zhao
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Shengfang Lu
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Yong Wang
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Xiaoqing Chen
- Institute of Translation Medicine, Shanghai University, Shanghai, China.,Luodian Clinical Drug Research Centre, Institute for Translational Medicine Research, Shanghai University, Shanghai, China
| | - Qun Zhang
- Baoshan Geriatric Nursing Hospital, Shanghai, China
| | - Junjie Chen
- Institute of Translation Medicine, Shanghai University, Shanghai, China.,Luodian Clinical Drug Research Centre, Institute for Translational Medicine Research, Shanghai University, Shanghai, China
| | | | - Gang Huang
- Department of Urology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guibing He
- Clinical Research Centre, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
| | - Xinru Liu
- Institute of Translation Medicine, Shanghai University, Shanghai, China.,Luodian Clinical Drug Research Centre, Institute for Translational Medicine Research, Shanghai University, Shanghai, China
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