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https://www.readbyqxmd.com/read/28828055/gas-reflux-in-children-with-normal-acid-exposure-of-the-oesofagus
#1
Felicia Galos, Catalin Boboc, Mihaela Balgradean
The clinical manifestations of non-erosive gastroesophageal reflux disease (NERD) are multiple and heterogeneous, and differ according to age and individual susceptibility. Weakly acidic reflux and the presence of gas in the refluxate could be relevant in the pathogenesis of symptoms. We present the case of a 3-year and 5-month-old child who came to the hospital with recurrent paroxysmal manifestations without fever assessed. The positive diagnosis was made using pH-metry associated with multichannel intraluminal impedance and glucose respiratory breath test, a new technique that allows positive diagnosis as well as establishes important connections regarding gas reflux and clinical symptomatology described by the patient...
December 2016: Mædica
https://www.readbyqxmd.com/read/28815026/the-diagnostic-value-of-24-hour-ambulatory-intraesophageal-ph-impedance-in-patients-with-laryngopharyngeal-reflux-symptoms-comparable-with-typical-symptoms
#2
Yusuf S Sakin, Rukiye Vardar, Baha Sezgin, Zeynep Erdogan Cetin, Yasemin Alev, Esra Yildirim, Tayfun Kirazli, Serhat Bor
BACKGROUND: The diagnosis of laryngopharyngeal reflux is currently based on a combination of the patient history of multichannel intraluminal impedance and ambulatory pH (MII-pH); however, none of these findings alone is specific for the diagnosis of laryngopharyngeal reflux. We aimed to compare the baseline characteristics and esophageal baseline impedance values between patients with and without laryngopharyngeal reflux symptoms. METHODS: We retrospectively analyzed data from two groups of patients with laryngopharyngeal reflux according to their reflux finding score (RFS) as scored by ENTs...
August 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28808763/characteristics-of-gastroesophageal-reflux-in-pediatric-patients-with-neurological-impairment
#3
Hisayoshi Kawahara, Yuko Tazuke, Hideki Soh, Noriaki Usui, Hiroomi Okuyama
PURPOSE: To clarify the characteristics of gastroesophageal reflux (GER) in pediatric patients with neurological impairment (NI). METHODS: Twenty-six patients with NI, 1-17-year-old, fed via a nasogastric tube were categorized based on the absence (group I) or presence (group II) of abnormal GER, defined with multichannel intraluminal impedance-pH monitoring as %time with an esophageal pH <4.0 being ≥5.0% or number of liquid/mixed bolus reflux events(RE) >70 in 24 h...
August 14, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28803164/electrochemically-active-microorganisms-from-an-acid-mine-drainage-affected-site-promote-cathode-oxidation-in-microbial-fuel-cells
#4
Claudia Rojas, Ignacio T Vargas, Mary Ann Bruns, John M Regan
The limited database of acidophilic or acidotolerant electrochemically active microorganisms prevents advancements on microbial fuel cells (MFCs) operated under low pH. In this study, three MFCs were used to enrich cathodic biofilms using acid mine drainage (AMD) sediments as inoculum. Linear sweep voltammetry showed cathodic current plateaus of 5.5 (±0.7) mA at about -170mV vs Ag/AgCl and 8.5 (±0.9) mA between -500mV to -450mV vs Ag/AgCl for biofilms developed on small graphite fiber brushes. After gamma irradiation, biocathodes exhibited a decrease in current density approaching that of abiotic controls...
August 3, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28800823/detection-and-quantification-of-alicyclobacillus-acidoterrestris-by-electrical-impedance-in-apple-juice
#5
Pilar Fernández, José Antonio Gabaldón, Mª Jesús Periago
Alicyclobacillus acidoterrestris is a thermotolerant bacterium able to grow in fruit juices and drinks, as the spoilage by Alicyclobacillus in the final product does not product any gas, but leads to a "medicine flavor" due to the formation of guaicol. Also, its detection is a challenge for the quality control departments, because it takes several days to get the results of traditional microbiology methods. This study aimed at developing a more accurate electrical impedance technique for the detection of A...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28794293/association-of-pulmonary-hypertension-with-inflammation-and-fluid-overload-in-hemodialysis-patients
#6
Hugo Hyung Bok Yoo, Roberto Dos Reis, Wagner Moneda Telini, Lidiane Rodrigues Telini, João Carlos Hueb, Silmeia Garcia Zanati Bazan, Pasqual Barretti, Luis Cuadrado Martin, Thais Thomaz Queluz
INTRODUCTION: Pulmonary hypertension (PH) has been reported in hemodialysis patients, but data regarding its pathogenesis are scarce. This study aimed to evaluate the role of fluid overload in PH and its interrelationships with the usual biomarkers of micro-inflammatory state in hemodialysis patients. MATERIALS AND METHODS: In is a cross-sectional and prospective study, 119 consecutive hemodialysis patients at a Brazilian referral university hospital were evaluated between March 2007 and February 2013...
July 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/28773875/protection-of-reinforced-concrete-structures-of-waste-water-treatment-reservoirs-with-stainless-steel-coating-using-arc-thermal-spraying-technique-in-acidified-water
#7
Han-Seung Lee, Jin-Ho Park, Jitendra Kumar Singh, Mohamed A Ismail
Waste water treatment reservoirs are contaminated with many hazardous chemicals and acids. Reservoirs typically comprise concrete and reinforcement steel bars, and the main elements responsible for their deterioration are hazardous chemicals, acids, and ozone. Currently, a variety of techniques are being used to protect reservoirs from exposure to these elements. The most widely used techniques are stainless steel plating and polymeric coating. In this study, a technique known as arc thermal spraying was used...
September 3, 2016: Materials
https://www.readbyqxmd.com/read/28773867/passivation-characteristics-of-alloy-corrosion-resistant-steel-cr10mo1-in-simulating-concrete-pore-solutions-combination-effects-of-ph-and-chloride
#8
Zhiyong Ai, Wei Sun, Jinyang Jiang, Dan Song, Han Ma, Jianchun Zhang, Danqian Wang
The electrochemical behaviour for passivation of new alloy corrosion-resistant steel Cr10Mo1 immersed in alkaline solutions with different pH values (13.3, 12.0, 10.5, and 9.0) and chloride contents (0.2 M and 1.0 M), was investigated by various electrochemical techniques: linear polarization resistance, electrochemical impedance spectroscopy and capacitance measurements. The chemical composition and structure of passive films were determined by XPS. The morphological features and surface composition of the immersed steel were evaluated by SEM together with EDS chemical analysis...
September 1, 2016: Materials
https://www.readbyqxmd.com/read/28772772/the-passive-film-growth-mechanism-of-new-corrosion-resistant-steel-rebar-in-simulated-concrete-pore-solution-nanometer-structure-and-electrochemical-study
#9
Jin-Yang Jiang, Danqian Wang, Hong-Yan Chu, Han Ma, Yao Liu, Yun Gao, Jinjie Shi, Wei Sun
An elaborative study was carried out on the growth mechanism and properties of the passive film for a new kind of alloyed corrosion-resistant steel (CR steel). The passive film naturally formed in simulated concrete pore solutions (pH = 13.3). The corrosion resistance was evaluated by various methods including open circuit potential (OCP), linear polarization resistance (LPR) measurements, and electrochemical impedance spectroscopy (EIS). Meanwhile, the 2205 duplex stainless steel (SS steel) was evaluated for comparison...
April 14, 2017: Materials
https://www.readbyqxmd.com/read/28768420/sputter-coated-zno-thin-films-on-glass-and-polycarbonate-evaluation-of-stability-and-interaction-with-flavin-adenine-dinucleotide-dependent-oxidases
#10
Fidal Vallam Thodi, Abhilash Thendiyammal, Balasubrahmaniyam Mukundakumar, Kasiviswanathan Subbiah, Chandra T Sainathan
Aqueous stability of sputter coated ZnO thin films were studied on two base materials, viz., polycarbonate (PC) and glass. The films showed higher stability on PC compared to glass, when exposed to aqueous buffered solution at pH-7.4, as studied by x-ray diffraction, surface reflectometry, and inductively coupled plasma-optical emission spectroscopy. Glucose oxidase (GOx) and cholesterol oxidase (Chl.Ox.) were used as model enzymes to study their electrochemical interaction with ZnO/PC. GOx showed a higher immobilization on ZnO/PC with an activity of 9...
August 2, 2017: Biointerphases
https://www.readbyqxmd.com/read/28766146/chemical-properties-of-dissolved-organic-matter-derived-from-sugarcane-rind-and-the-impacts-on-copper-adsorption-onto-red-soil
#11
Sihai Hu, Yaoguo Wu, Na Yi, Shuai Zhang, Yuanjing Zhang, Xu Xin
Dissolved organic matter (DOM), as the most active organic carbon in the soil, has a coherent affinity with heavy metals from inherent and exogenous sources. Although the important roles of DOM in the adsorption of heavy metals in soil have previously been demonstrated, the heterogeneity and variability of the chemical constitution of DOM impede the investigation of its effects on heavy metal adsorption onto soil under natural conditions. Fresh DOM (FDOM) and degraded DOM (DDOM) from sugarcane rind were prepared, and their chemical properties were measured by Fourier-transform infrared spectrometry (FTIR), excitation-emission matrix (EEM) fluorescence spectroscopes, nuclear magnetic resonance (NMR), and molecular weight distribution (MWD)...
August 1, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28762047/pyrite-oxidation-under-simulated-acid-rain-weathering-conditions
#12
Kai Zheng, Heping Li, Luying Wang, Xiaoying Wen, Qingyou Liu
We investigated the electrochemical corrosion behavior of pyrite in simulated acid rain with different acidities and at different temperatures. The cyclic voltammetry, polarization curve, and electrochemical impedance spectroscopy results showed that pyrite has the same electrochemical interaction mechanism under different simulated acid rain conditions, regardless of acidity or environmental temperature. Either stronger acid rain acidity or higher environmental temperature can accelerate pyrite corrosion. Compared with acid rain having a pH of 5...
July 31, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28753017/acidity-triggered-ligand-presenting-nanoparticles-to-overcome-sequential-drug-delivery-barriers-to-tumors
#13
Tingting Wang, Dangge Wang, Jianping Liu, Bing Feng, Fangyuan Zhou, Hanwu Zhang, Lei Zhou, Qi Yin, Zhiwen Zhang, Zhonglian Cao, Haijun Yu, Yaping Li
The success of cancer chemotherapy is impeded by poor drug delivery efficiency due to the existence of a series of pathophysiological barriers in the tumor. In this study, we reported a tumor acidity-triggered ligand-presenting (ATLP) nanoparticle for cancer therapy. The ATLP nanoparticles were composed of an acid-responsive diblock copolymer as a sheddable matrix and an iRGD-modified polymeric prodrug of doxorubicin (iPDOX) as an amphiphilic core. A PEG corona of the polymer matrix protected the iRGD ligand from serum degradation and nonspecific interactions with the normal tissues while circulating in the blood...
August 1, 2017: Nano Letters
https://www.readbyqxmd.com/read/28750491/severe-delayed-gastric-emptying-induces-non-acid-reflux-up-to-proximal-esophagus-in-neurologically-impaired-patients
#14
Shinji Ishii, Suguru Fukahori, Kimio Asagiri, Yoshiaki Tanaka, Nobuyuki Saikusa, Naoki Hashizume, Motomu Yoshida, Daisuke Masui, Naoko Komatsuzaki, Naruki Higashidate, Saki Sakamoto, Tomohiro Kurahachi, Shiori Tsuruhisa, Hirotomo Nakahara, Minoru Yagi
Background/Aims: The aim of this study is to investigate the degree of delayed gastric emptying (DGE) and evaluate how the severity of DGE affects gastroesophageal reflux disease (GERD) in neurologically impaired (NI) patients utilizing 24-hour multichannel intraluminal impedance pH measurements (pH/MII) and (13)C-acetate breath test ((13)C-ABT) analyses. Methods: (13)C-ABT and pH/MII were conducted in 26 NI patients who were referred to our institution due to suspected GERD...
July 28, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28745440/design-rules-for-oxygen-evolution-catalysis-at-porous-iron-oxide-electrodes-thousand-fold-current-density-increase
#15
Sandra Haschke, Dmitrii Pankin, Yuri Petrov, Sebastian Bochmann, Alina Manshina, Julien Bachmann
Nanotubular iron(III) oxide electrodes are optimized for catalytic proficiency in the water oxidation reaction at neutral pH. Nanostructured electrodes are prepared from anodic alumina templates coated with Fe2O3 by atomic layer deposition. Scanning helium ion microscopy, X-ray diffraction and Raman spectroscopy characterize the morphology and phase of samples submitted to various treatments. These methods document the contrasting effects of thermal annealing, on the one hand, and of electrochemical treatment, on the other hand...
July 26, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28742019/high-lumenal-chloride-in-the-lysosome-is-critical-for-lysosome-function
#16
Kasturi Chakraborty, KaHo Leung, Yamuna Krishnan
Lysosomes are organelles responsible for the breakdown and recycling of cellular machinery. Dysfunctional lysosomes give rise to lysosomal storage disorders as well as common neurodegenerative diseases. Here, we use a DNA-based, fluorescent chloride reporter to measure lysosomal chloride in Caenorhabditis elegans as well as murine and human cell culture models of lysosomal diseases. We find that the lysosome is highly enriched in chloride, and that chloride reduction correlates directly with a loss in the degradative function of the lysosome...
July 25, 2017: ELife
https://www.readbyqxmd.com/read/28740669/impact-of-thoracic-surgery-on-esophageal-motor-function-evaluation-by-high-resolution-manometry
#17
Anja Wäsche, Arne Kandulski, Peter Malfertheiner, Sandra Riedel, Patrick Zardo, Thomas Hachenberg, Jens Schreiber
BACKGROUND: Alteration of esophageal function is a potential risk factor for postoperative complications in thoracic surgery. This prospective study investigates esophageal motility and function during and after thoracic procedures via high resolution manometry (HRM) and impedance technology with spatiotemporal representation of pressure data. METHODS: Twelve consecutive patients eligible for elective thoracic surgery underwent preoperative and postoperative (48 hours and 7 days) esophageal HRM...
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28738637/sensitive-detection-of-estriol-hormone-in-creek-water-using-a-sensor-platform-based-on-carbon-black-and-silver-nanoparticles
#18
Paulo A Raymundo-Pereira, Anderson M Campos, Fernando C Vicentini, Bruno C Janegitz, Camila D Mendonça, Leonardo N Furini, Naiza V Boas, Marcelo L Calegaro, Carlos J L Constantino, Sergio A S Machado, Osvaldo N Oliveira
We report the electrochemical detection of estriol using carbon black nanoballs (CNB) decorated with silver nanoparticles (AgNP) as electrode material. Homogeneous, porous films on glassy carbon electrodes (GCE) were obtained, with diameters of 20 - 25nm for CNB and 5 - 6nm for AgNP. CNB/AgNP electrodes had increased conductivity and electroactive area in comparison with bare GCE and GCE/CNB, according to cyclic voltammetry and electrochemical impedance spectroscopy. The oxidation potential peak was also down shifted by 93mV, compared to the bare GC electrode...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28731842/role-of-pepsin-and-oropharyngeal-ph-monitoring-to-assess-the-postoperative-outcome-of-patients-with-laryngopharyngeal-reflux-results-of-a-pilot-trial
#19
Michael Weitzendorfer, Richard Pfandner, Stavros A Antoniou, Werner Langsteger, Kai Witzel, Klaus Emmanuel, Oliver O Koch
BACKGROUND: The aim of this study was to evaluate the value of salivary pepsin and oropharyngeal pH-monitoring to assess the surgical outcome of patients with laryngopharyngeal reflux (LPR). MATERIALS AND METHODS: Twenty consecutive patients with LPR despite proton pump inhibitor treatment received laparoscopic antireflux surgery. Twenty-four hour esophageal pH-monitoring (multichannel intraluminal impedance monitoring [MII]-pH) and esophageal manometry (high-resolution manometry) data were documented preoperatively and at 3-month follow-up...
July 21, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28730506/hiatus-hernia-as-a-cause-of-dysphagia
#20
REVIEW
Hamish Philpott, Rami Sweis
PURPOSE OF REVIEW: This review aims to discuss the putative relationship between hiatus hernia and dysphagia. RECENT FINDINGS: Proposed mechanisms of dysphagia in patients with hiatus hernia are usually difficult to identify, but recent advances in technology (high-resolution manometry with or without concomitant impedance, ambulatory pH with impedance, videofluoroscopy, and the endoluminal functional lumen imaging probe (EndoFLIP)) and methodology (inclusion of swallows of various consistencies and volumes or shifting position during the manometry protocol) can help induce symptoms and identify the underlying disorder...
August 2017: Current Gastroenterology Reports
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