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https://www.readbyqxmd.com/read/28090568/pathophysiology-of-intestinal-na-h-exchange
#1
Michael A Gurney, Daniel Laubitz, Fayez K Ghishan, Pawel R Kiela
Several members of the SLC9A family of Na(+)/H(+) exchangers are expressed in the gut, with varying expression patterns and cellular localization. Not only do they participate in the regulation of basic epithelial cell functions, including control of transepithelial Na(+) absorption, intracellular pH (pH i ), cell volume, and nutrient absorption, but also in cellular proliferation, migration, and apoptosis. Additionally, they modulate the extracellular milieu in order to facilitate other nutrient absorption and to regulate the intestinal microbial microenvironment...
January 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28077431/enantiomers-recognition-of-propranolol-based-on-organic-inorganic-hybrid-open-tubular-mips-cec-column-using-3-trimethoxysilyl-propyl-methacrylate-as-a-cross-linking-monomer
#2
Guo-Ning Chen, Ning Li, Tian Luo, Yu-Ming Dong
In this study, 3-(trimethoxysilyl)propyl methacrylate (γ-MPS), a bifunctional group compound, was used as a single cross-linking agent to prepare molecular imprinted inorganic-organic hybrid polymers by in situ polymerization for open-tubular capillary electro chromatography (CEC) column. The optimal preparation conditions were: the ratio between template molecule and functional monomer was 1:4; the volume proportion of porogen toluene and methanol was 1:1 and the volume of cross-linking agent γ-MPS was 69 μL...
January 10, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28075599/enhancing-cation-diffusion-and-suppressing-anion-diffusion-via-lewis-acidic-polymer-electrolytes
#3
Brett M Savoie, Michael A Webb, Thomas F Miller
Solid polymer electrolytes (SPE) have the potential to increase both the energy density and stability of lithium-based batteries, but low Li+ conductivity remains a barrier to technological viability. SPEs are designed to maximize Li+ diffusivity relative to the anion, while maintaining sufficient salt solubility. It is thus remarkable that polyethylene oxide (PEO), the most widely used SPE, exhibits Li+ diffusivity that is an order of magnitude smaller than that of typical counter-ions at moderate salt concentrations...
January 11, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28070957/controlled-trial-of-hartmann-s-solution-versus-0-9-saline-for-diabetic-ketoacidosis
#4
Michael Yung, Georgia Letton, Steve Keeley
AIM: We aimed to determine whether using a balanced salt solution, Hartmann's solution (HS), in diabetic ketoacidosis (DKA) shortens the time to normalise acid-base status through the avoidance of hyperchloremic metabolic acidosis compared with 0.9% normal saline (NS). METHODS: We conducted a double-blind, randomised controlled trial comparing HS to NS as the initial intravenous fluid in children with DKA. Patients were stratified by severity (pH < 7.1) and known or new diabetes...
January 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28067487/investigation-into-pseudo-capacitance-behavior-of-glycoside-containing-hydrogels
#5
Nachiket R Raravikar, Andrew Dobos, Eshwaran Narayanan, Taraka Sai Pavan Grandhi, Saurabh Mishra, Kaushal Rege, Michael Goryll
Electrochemical pseudo-capacitors are an attractive choice for energy storage applications because they offer higher energy densities than electrostatic or electric double layer capacitors. They also offer higher power densities in shorter durations of time, as compared to batteries. Recent efforts on pseudo-capacitors include biocompatible hydrogel electrolytes and transition metal electrodes for implantable energy storage applications. Pseudo-capacitive behavior in these devices has been attributed to the redox reactions that occur within the electric double layer, which is formed at the electrode-electrolyte interface...
January 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28067362/electrochemical-manipulation-of-cell-populations-supported-by-biodegradable-polymeric-nanosheets-for-cell-transplantation-therapy
#6
Jin Suzuki, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji
We describe an electrochemical method of harvesting cells cultured on a biodegradable polymeric nanosheet (cell/nanosheet construct), which is stabilized on a self-assembled monolayer (SAM) of thiol molecules. A poly(lactic-co-glycolic acid) (PLGA) nanosheet was attached by hydrophobic interactions onto the surface of a SAM of l-cysteine coated onto a gold electrode. Retinal pigment epithelial cell lines (RPE-J cells) were cultured on the nanosheet to form a monolayer. An AA-size dry battery was used to apply a negative electrical potential, causing reductive desorption of the SAM from the gold surface...
January 9, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28065791/the-neuroprotective-strategic-analysis-for-patients-with-acute-myocardial-infarction-combined-with-hypoxic-ischemic-encephalopathy-in-icu
#7
Yali Chao, Weiwei Hu, Xiaojuan Geng
BACKGROUND: We conducted this study to investigate the neuroprotective treatment strategies for patients with acute myocardial infarction (AMI) complicated with hypoxic ischemic encephalopathy (HIE) in the ICU. METHODS: A total of 83 cases that were diagnosed with secondary AMI for the first time were selected and divided into observation group (n=43) and the control group (n=40). All of patients underwent emergency or elective PCI. Patients in the control group were treated with mannitol to reduce intracranial pressure, cinepazide maleate to improve microcirculation in the brain and also given comprehensive treatments of oxygen inhalation, fluid infusion, acid-base imbalance correction, electrolyte disturbance, etc...
January 5, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28051049/non-laparoscopic-minimal-surgical-approach-to-pyloromyotomy-an-experience-from-a-challenged-resource-setting
#8
Ossama M Zakaria
BACKGROUND: The aim of the study is to review the experience with the classic Ramstedt's pyloromyotomy through the RUQ approach and the circumlinear supraumbilical fold approach (circumumbilical [CU]) pyloromyotomy (an approach that combines the ease and safety of the open pyloromyotomy with the advantages of minimal invasiveness). PATIENTS AND METHODS: A single centre review in a period of 12 years from January 2001 to December 2013 with the institutional ethical committee's approval, evaluating 316 pyloromyotomies based on surgical approach: RUQ (171); and CU (145)...
October 2016: African Journal of Paediatric Surgery: AJPS
https://www.readbyqxmd.com/read/28045916/effects-of-different-oral-doses-of-sodium-chloride-on-the-basal-acid-base-and-mineral-status-of-exercising-horses-fed-low-amounts-of-hay
#9
Annette Zeyner, Kristin Romanowski, Andreas Vernunft, Patricia Harris, Ann-Marie Müller, Carola Wolf, Ellen Kienzle
The provision of NaCl, according to current recommendations, to horses in moderate work has been shown to induce immediate postprandial acidosis. The present study aimed to clarify whether this NaCl induced acidosis i) persists beyond the immediate postprandial period, and ii) is still present after a 2 week adaptation period. Six adult warmblood mares in moderate work received daily 1.00 kg hay per 100 kg body weight (bwt) only together with 0.64 kg unprocessed cereal grains/100 kg bwt.d as fed basis. Using a 3x3 Latin Square, either 0 (NaCl-0), 50 (NaCl-50) or 100 (NaCl-100) g NaCl/d were fed together with the concentrates in two equal doses for 3 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28029394/non-anion-gap-metabolic-acidosis-a-clinical-approach%C3%A2-to%C3%A2-evaluation
#10
Mandana Rastegar, Glenn T Nagami
Acid-base disturbances can result from kidney or nonkidney disorders. We present a case of high-volume ileostomy output causing large bicarbonate losses and resulting in a non-anion gap metabolic acidosis. Non-anion gap metabolic acidosis can present as a form of either acute or chronic metabolic acidosis. A complete clinical history and physical examination are critical initial steps to begin the evaluation process, followed by measuring serum electrolytes with a focus on potassium level, blood gas, urine pH, and either direct or indirect urine ammonium concentration...
October 28, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28028530/acid-base-and-hemodynamic-status-of-patients-with-intraoperative-hemorrhage-using-two-solution-types-crystalloid-ringer-lactate-and-1-3-sodium-bicarbonate-in-half-normal-saline-solution
#11
Sayed Jalal Hashemi, Sayed Morteza Heidari, Ahmad Yaraghi, Reza Seirafi
BACKGROUND: Intraoperative hemorrhage is one of the problems during surgery and, if it happens in a high volume without an immediate action to control, it can be fatal. Nowadays, various injectable solutions are used. The aim of this study was to compare the acid-base and hemodynamic status of the patient using two solutions, Ringer lactate and 1.3% sodium bicarbonate, in half saline solution. MATERIALS AND METHODS: This clinical trial was performed at the Al-Zahra Hospital in 2013 on 66 patients who were randomly selected and put in two studied groups at the onset of hemorrhage...
2016: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28011057/the-ischemic-nephrotoxic-acute-kidney-injury-and-the-use-of-renal-biomarkers-in-clinical-practice
#12
REVIEW
Michele Andreucci, Teresa Faga, Antonio Pisani, Maria Perticone, Ashour Michael
The term Acute Renal Failure (ARF) has been replaced by the term Acute Kidney Injury (AKI). AKI indicates an abrupt (within 24-48h) decrease in Glomerular Filtraton Rate, due to renal damage, that causes fluid and metabolic waste retention and alteration of electrolyte and acid-base balance. The renal biomarkers of AKI are substances or processes that are indicators of normal or impaired function of the kidney. The most used renal biomarker is still serum creatinine that is inadequate for several reasons, one of which is its inability to differentiate between hemodynamic changes of renal function ("prerenal azotemia") from intrinsic renal failure or obstructive nephropathy...
December 21, 2016: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28006096/competitive-oxygen-evolution-in-acid-electrolyte-catalyzed-at-technologically-relevant-electrodes-painted-with-nanoscale-ruo2
#13
Paul A DeSario, Christopher N Chervin, Eric S Nelson, Megan B Sassin, Debra R Rolison
Using a solution-based, non-line-of sight synthesis, we electrolessly deposit ultrathin films of RuO2 ("nanoskins") on planar and 3D substrates and benchmark their activity and stability for oxygen-evolution reaction (OER) in acid electrolyte under device-relevant conditions. When an electrically contiguous ∼9 nm thick RuO2 nanoskin is expressed on commercially available, insulating SiO2 fiber paper, the RuO2@SiO2 electrode exhibits high current density at low overpotential (10 mA cm(-2) @ η = 280 mV), courtesy of a catalyst amplified in 3D; however, the mass-normalized activity falls short of that achieved for films deposited on planar, metallic substrates (Ti foil)...
January 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28005739/minimally-invasive-strip-craniectomy-simplifies-anesthesia-practice-in-patients-with-isolated-sagittal-synostosis
#14
Daan P F van Nunen, Bart M Stubenitsky, Peter A Woerdeman, Kuo Sen Han, Corstiaan C Breugem, Aebele B Mink van der Molen, Jurgen C de Graaff
BACKGROUND: Traditional open corrective surgery for isolated sagittal synostosis entails significant blood loss, transfusion rates, morbidity, and a lengthy hospitalization. Minimally invasive strip craniectomy (MISC) was introduced to avoid the disadvantages of open techniques. OBJECTIVES: The aim of the study was, first, to compare the anesthesia practice in MISC and open extended strip craniectomy (OESC), and, second, to evaluate the incidence of perioperative complications in both surgical procedures...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005240/complicated-pregnancies-in-inherited-distal-renal-tubular-acidosis-importance-of-acid-base-balance
#15
Harald Seeger, Peter Salfeld, Rüdiger Eisel, Carsten A Wagner, Nilufar Mohebbi
Inherited distal renal tubular acidosis (dRTA) is caused by impaired urinary acid excretion resulting in hyperchloremic metabolic acidosis. Although the glomerular filtration rate (GFR) is usually preserved, and hypertension and overt proteinuria are absent, it has to be considered that patients with dRTA also suffer from chronic kidney disease (CKD) with an increased risk for adverse pregnancy-related outcomes. Typical complications of dRTA include severe hypokalemia leading to cardiac arrhythmias and paralysis, nephrolithiasis and nephrocalcinosis...
December 22, 2016: Journal of Nephrology
https://www.readbyqxmd.com/read/27976844/constructing-straight-polyionic-liquid-microchannels-for-fast-anhydrous-proton-transport
#16
Parashuram Kallem, Adela Eguizabal, Reyes Mallada, Maria Pilar Pina
Polymeric ionic liquids (PILs) have triggered great interest as all solid-state flexible electrolytes because of safety and superior thermal, chemical, and electrochemical stability. It is of great importance to fabricate highly conductive electrolyte membranes capable to operate above 120 °C under anhydrous conditions and in the absence of mineral acids, without sacrificing the mechanical behavior. Herein, the diminished dimensional and mechanical stability of poly[1-(3H-imidazolium)ethylene]bis(trifluoromethanesulfonyl)imide has been improved thanks to its infiltration on a polybenzimidale (PBI) support with specific pore architecture...
December 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27960441/a-novel-single-ion-conducting-polymer-electrolyte-derived-from-co2-based-multifunctional-polycarbonate
#17
Kuirong Deng, Shuanjin Wang, Shan Ren, Dongmei Han, Min Xiao, Yuezhong Meng
This work demonstrates the facile and efficient synthesis of a novel environmentally friendly CO2-based multifunctional polycarbonate single-ion-conducting polymer electrolyte with good electrochemistry performance. The terpolymerizations of CO2, propylene epoxide (PO), and allyl glycidyl ether (AGE) catalyzed by zinc glutarate (ZnGA) were performed to generate poly(propylene carbonate allyl glycidyl ether) (PPCAGE) with various alkene groups contents which can undergo clickable reaction. The obtained terpolymers exhibit an alternating polycarbonate structure confirmed by (1)H NMR spectra and an amorphous microstructure with glass transition temperatures (Tg) lower than 11...
December 14, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27960416/self-stable-wp-c-support-with-excellent-cocatalytic-functionality-for-pt-enhanced-catalytic-activity-and-durability-for-methanol-electro-oxidation
#18
Yaqiang Duan, Ye Sun, Siyu Pan, Ying Dai, Liang Hao, Jinlong Zou
To endow catalyst support with excellent stability and cocatalytic activity toward methanol, oxidation reaction (MOR) is an effective way to strengthen the electrocatalytic activity of Pt-based catalysts. Tungsten phosphide/3D-corrugated porous carbon (WP/C) composite as Pt-support and cocatalyst for MOR is prepared via a synchronous synthesis method. Porous 3D-tufted structure and high surface area of WP/C with abundant oxygen-containing groups (such as C-O-C, C-O-H, or C-OH) can significantly improve the exposure of active sites, which enlarge the contact area with electrolyte and facilitate the mass transfer and absorption of methanol for promoting the MOR activity in acidic electrolyte...
December 14, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27959558/sodium-chloride-triggered-the-fusion-of-vesicle-composed-of-fatty-acid-modified-protic-ionic-liquid-a-new-insight-into-the-membrane-fusion-monitored-through-fluorescence-lifetime-imaging-microscopy
#19
Niloy Kundu, Pavel Banerjee, Sangita Kundu, Rupam Dutta, Nilmoni Sarkar
The development of stable vesicular assemblies and the understanding of their interaction and dynamics in aqueous solution are long-standing topics in the research of chemistry and biology. Fatty acids are known to form vesicle structure in aqueous solution depending on the pH of the medium. Protic ionic liquid of fatty acid with ethyl amine (oleate ethyl amine, OEA) as a component spontaneously forms a vesicle in aqueous solution. The general comparison of dynamics and interaction of these two vesicles have been drawn using fluorescence correlation spectroscopy (FCS) and fluorescence lifetime imaging microscopy (FLIM) measurements...
December 28, 2016: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/27943610/covalent-surface-modification-of-gaas-100-photocathodes-for-water-splitting-in-highly-acidic-electrolyte
#20
Logan E Garner, K Xerxes Steirer, James L Young, Nicholas C Anderson, Elisa M Miller, Jonathan S Tinkham, Todd G Deutsch, Alan Sellinger, John A Turner, Nathan R Neale
Efficient water splitting using light as the only energy input requires stable semiconductor electrodes with favorable energetics for the water oxidation and proton reduction reactions. Strategies to tune electrode potentials using molecular dipoles adsorbed to the semiconductor surface have been pursued for decades but are often based on weak interactions and quickly react to desorb the molecule under conditions relevant to sustained photoelectrolysis. Here, we show that covalent attachment of fluorinated, aromatic molecules to p-GaAs(100) surfaces can be employed to tune the photocurrent onset potentials of p-GaAs(100) photocathodes and reduce the external energy required for water splitting...
December 12, 2016: ChemSusChem
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