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Bicarbonate

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https://www.readbyqxmd.com/read/28650387/comparison-of-combined-endoscopic-ultrasonography-and-endoscopic-secretin-testing-with-the-traditional-secretin-pancreatic-function-test-in-patients-with-suspected-chronic-pancreatitis-a-prospective-crossover-study
#1
Darshan Kothari, Gyanprakash Ketwaroo, Mandeep S Sawhney, Steven D Freedman, Sunil G Sheth
OBJECTIVE: We aimed to determine the feasibility and accuracy of a combined endoscopic ultrasonography (EUS) with a shortened pancreatic function testing (sEUS) for structural and functional assessment using a single instrument in patients with suspected chronic pancreatitis (CP). METHODS: We completed a prospective crossover study, enrolling patients with suspected CP. Patients who underwent both traditional 1-hour secretin pancreatic function test (sPFT) and sEUS were included in the analysis...
June 22, 2017: Pancreas
https://www.readbyqxmd.com/read/28648509/pendred-syndrome
#2
REVIEW
Jean-Louis Wémeau, Peter Kopp
Pendred syndrome is an autosomal recessive disorder that is classically defined by the combination of sensorineural deafness/hearing impairment, goiter, and an abnormal organification of iodide with or without hypothyroidism. The hallmark of the syndrome is the impaired hearing, which is associated with inner ear malformations such as an enlarged vestibular aqueduct (EVA). The thyroid phenotype is variable and may be modified by the nutritional iodine intake. Pendred syndrome is caused by biallelic mutations in the SLC26A4/PDS gene, which encodes the multifunctional anion exchanger pendrin...
March 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28647321/development-of-large-scale-and-economic-ph-control-system-for-outdoor-cultivation-of-microalgae-haematococcus-pluvialis-using-industrial-flue-gas
#3
Yoon Young Choi, Jae Min Joun, Jeewon Lee, Min Eui Hong, Hoang-Minh Pham, Won Seok Chang, Sang Jun Sim
The aim of this study was to develop the economic and effective buffer system for microalgae mass cultivation using industrial flue gas. Due to the continuous flue gas supplement, culture media acidified, therefore cell growth inhibited. Although buffering agent was added, this result increase in cost for overall culture process. Therefore combined buffer system of bicarbonate and phosphate (BP) for large-scale use was investigated. The bicarbonate buffer system generated from CO2 dissolution, additionally phosphate buffer system improves the buffer performance under the continuous CO2 supplementation from flue gas...
May 26, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28647239/fluoride-removal-by-al-ti-and-fe-hydroxides-and-coexisting-ion-effect
#4
Jianfeng Zhang, Timothy E Brutus, Jiemin Cheng, Xiaoguang Meng
Batch experiments were conducted to evaluate fluoride removal by Al, Fe, and Ti-based coagulants and adsorbents, as well as the effects of coexisting ions and formation of aluminum-fluoride complexes on fluoride removal by co-precipitation with alum (Al2(SO4)3·18H2O). Aluminum sulfate was more efficient than the other coagulants for fluoride removal in the pH range between 6 and 8. Nano-crystalline TiO2 was more effective for fluoride removal than Al and Fe hydroxides in a pH range of 3-5. Coexisting anions in water decreased the removal of fluoride in the order: phosphate (2...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646128/%C3%AE-copi-mediates-the-retention-of-kae1-g701d-protein-in-golgi-apparatus-a-mechanistic-explanation-of-drta-associated-g701d-mutation
#5
Natapol Duangtum, Mutita Junking, Suratchanee Phadngam, Nunghathai Sawasdee, Andrea Castiglioni, Komgrid Charngkaew, Thawornchai Limjindaporn, Ciro Isidoro, Pa-Thai Yenchitsomanus
Mutations of solute carrier family 4 member 1 ( SLC4A1 ) gene encoding kidney anion (chloride/bicarbonate ion) exchanger 1 (kAE1) can cause genetic distal renal tubular acidosis (dRTA). Different SLC4A1 mutations give rise to mutant kAE1 proteins with distinct defects in protein trafficking. The mutant kAE1 protein may be retained in endoplasmic reticulum (ER), Golgi apparatus, or mis-targeted to the apical membrane, failing to display its function at the baso-lateral membrane. The ER-retained mutant kAE1 interacts with calnexin chaperone protein; disruption of this interaction permits the mutant kAE1 to reach the cell surface and display anion exchange activity...
June 23, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28645705/acid-load-and-phosphorus-homeostasis-in-ckd
#6
Pascale Khairallah, Tamara Isakova, John Asplin, Lee Hamm, Mirela Dobre, Mahboob Rahman, Kumar Sharma, Mary Leonard, Edgar Miller, Bernard Jaar, Carolyn Brecklin, Wei Yang, Xue Wang, Harold Feldman, Myles Wolf, Julia J Scialla
BACKGROUND: The kidneys maintain acid-base homeostasis through excretion of acid as either ammonium or as titratable acids that primarily use phosphate as a buffer. In chronic kidney disease (CKD), ammoniagenesis is impaired, promoting metabolic acidosis. Metabolic acidosis stimulates phosphaturic hormones, parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF-23) in vitro, possibly to increase urine titratable acid buffers, but this has not been confirmed in humans. We hypothesized that higher acid load and acidosis would associate with altered phosphorus homeostasis, including higher urinary phosphorus excretion and serum PTH and FGF-23...
June 21, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28644688/intraosseous-administration-of-antidotes-a-systematic-review
#7
Audrée Elliott, Pierre-André Dubé, Amélie Cossette-Côté, Laura Patakfalvi, Eric Villeneuve, Martin Morris, Sophie Gosselin
CONTEXT: Intraosseous (IO) access is an established route of administration in resuscitation situations. Patients with serious poisoning presenting to the emergency department may require urgent antidote therapy. However, intravenous (IV) access is not always readily available. OBJECTIVE: This study reviews the current evidence for IO administration of antidotes that could be used in poisoning. The primary outcome was mortality as a surrogate of efficacy. Secondary outcomes included hemodynamic variables, electrocardiographic variables, neurological status, pharmacokinetics outcomes, and adverse effects as defined by each article...
June 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28642866/evaluation-of-serum-for-pathophysiological-effects-of-prolonged-low-salinity-water-exposure-in-displaced-bottlenose-dolphins-tursiops-truncatus
#8
Ruth Y Ewing, Blair Mase-Guthrie, Wayne McFee, Forrest Townsend, Charles A Manire, Michael Walsh, Rose Borkowski, Gregory D Bossart, Adam M Schaefer
We conducted a retrospective study of serum biochemistry and hematologic findings from displaced, out-of-habitat bottlenose dolphins (Tursiops truncatus) exposed to various low salinity environments in waters along the southern United States including southeastern Atlantic and northern Gulf of Mexico. Serum sodium, chloride, and calculated osmolality were significantly lower and below reference ranges in displaced animals compared to free-ranging case control animals. This suggests clinical hyponatremia, hypochloremia, and hypo-osmolality due to an uptake of low saline water from the environment...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28642116/contrast-induced-nephropathy-basic-concepts-pathophysiological-implications-and-prevention-strategies
#9
REVIEW
Charalampos Mamoulakis, Konstantinos Tsarouhas, Irini Fragkiadoulaki, Ioannis Heretis, Martin F Wilks, Demetrios A Spandidos, Christina Tsitsimpikou, Aristides Tsatsakis
Contrast-induced nephropathy (CIN) is reversible acute renal failure observed following administration of iodinated contrast media (CM) during angiographic or other medical procedures such as urography. There are various mechanisms through which CM develop their nephrotoxic effects, including oxidative stress and apoptosis. CIN is a real-life, albeit not very rare, entity. Exact pathophysiology remains obscure and no standard diagnostic criteria apply. The Acute Kidney Injury Network criteria was recently employed but its incidence/clinical significance warrants further clarification based on recent methodological advancements, because most published studies to date were contaminated by bias...
June 19, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28638321/membrane-guanylate-cyclase-catalytic-subdomain-structure-and-linkage-with-calcium-sensors-and-bicarbonate
#10
Sarangan Ravichandran, Teresa Duda, Alexandre Pertzev, Rameshwar K Sharma
Membrane guanylate cyclase (MGC) is a ubiquitous multi-switching cyclic GMP generating signaling machine linked with countless physiological processes. In mammals it is encoded by seven distinct homologous genes. It is a single transmembrane spanning multi-modular protein; composed of integrated blocks and existing in homo-dimeric form. Its core catalytic domain (CCD) module is a common transduction center where all incoming signals are translated into the production of cyclic GMP, a cellular signal second messenger...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28637277/measuring-co2-and-hco3-permeabilities-of-isolated-chloroplasts-using-a-mims-18o-approach
#11
Dimitri Tolleter, Vincent Chochois, Richard Poiré, G Dean Price, Murray R Badger
To support photosynthetic CO2 fixation by Rubisco, the chloroplast must be fed with inorganic carbon in the form of CO2 or bicarbonate. However, the mechanisms allowing the rapid passage of this gas and this charged molecule through the bounding membranes of the chloroplast envelope are not yet completely elucidated. We describe here a method allowing us to measure the permeability of these two molecules through the chloroplast envelope using a membrane inlet mass spectrometer and 18O-labelled inorganic carbon...
June 16, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28634470/the-dark-side-of-the-mushroom-spring-microbial-mat-life-in-the-shadow-of-chlorophototrophs-ii-metabolic-functions-of-abundant-community-members-predicted-from-metagenomic-analyses
#12
Vera Thiel, Michael Hügler, David M Ward, Donald A Bryant
Microbial mat communities in the effluent channels of Octopus and Mushroom Springs within the Lower Geyser Basin of Yellowstone National Park have been extensively characterized. Previous studies have focused on the chlorophototrophic organisms of the phyla Cyanobacteria and Chloroflexi. However, the diversity and metabolic functions of the other portion of the community in the microoxic/anoxic region of the mat are poorly understood. We recently described the diverse but extremely uneven microbial assemblage in the undermat of Mushroom Spring based on 16S rRNA amplicon sequences, which was dominated by Roseiflexus members, filamentous anoxygenic chlorophototrophs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28629192/effects-of-sulfate-chloride-and-bicarbonate-on-iron-stability-in-a-pvc-u-drinking-pipe
#13
Jiaying Wang, Tao Tao, Hexiang Yan
In order to describe iron stability in plastic pipes and to ensure the drinking water security, the influence factors and rules for iron adsorption and release were studied, dependent on the Unplasticized poly (vinyl chloride) (PVC-U) drinking pipes employed in this research. In this paper, sulfate, chloride, and bicarbonate, as well as synthesized models, were chosen to investigate the iron stability on the inner wall of PVC-U drinking pipes. The existence of the three kinds of anions could significantly affect the process of iron adsorption, and a positive association was found between the level of anion concentration and the adsorption rate...
June 19, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28627496/controllable-synthesis-of-nickel-bicarbonate-nanocrystals-with-high-homogeneity-for-high-performance-supercapacitor
#14
Jianmin Gu, Xin Liu, Zhuang Wang, Zhenpan Bian, Cuihong Jin, Xiao Sun, Baipeng Yin, Tianhui Wu, Lin Wang, Shoufeng Tang, Hongchao Wang, Fa-Ming Gao
The electrochemical performance for supercapacitors might be associated with the homogeneous structure of the electrode materials. However, the relation between the degree of uniformity for the electrode materials and the electrochemical performance of the supercapacitor is not clear. Herein, we synthesize two types of nickel bicarbonate nanocrystals with different degree of uniformity for investigating the relationship. The nickel bicarbonate nanocrystals with the homogeneous structure, as the electroactive materials, could provide larger space and offer more exposed atoms for the electrochemical reaction than the nanocrystals with the heterogeneous structure, which exhibits better electrochemical performances...
June 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28623674/cathepsin-k-in-lymphangioleiomyomatosis-lam-cell-fibroblast-interactions-enhance-protease-activity-by-extracellular-acidification
#15
Arundhati Dongre, Debbie Clements, Andrew J Fisher, Simon R Johnson
Lymphangioleiomyomatosis (LAM) is a rare disease in which clonal LAM cells infiltrate the lungs and lymphatics. In association with recruited fibroblasts, LAM cells form nodules adjacent to lung cysts. It is hypothesized that LAM nodule-derived proteases lead to cyst formation. On protease gene-expression profiling in whole-lung tissue, cathepsin K was 40-fold overexpressed in LAM compared with control lungs (P ≤ 0.0001). Immunohistochemistry confirmed cathepsin K protein in LAM nodules but not in control lungs...
June 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28623437/root-derived-bicarbonate-assimilation-in-response-to-variable-water-deficit-in-camptotheca-acuminate-seedlings
#16
Sen Rao, Yanyou Wu
Water deficit is one of the key factors that limits the carbon (C) assimilation and productivity of plants. The effect of variable water deficit on recently root-derived bicarbonate assimilation in Camptotheca acuminate seedlings was investigated. Three-month-old seedlings were subjected to three water regimes, well-watered (WW), moderate stress (MS), and severe stress (SS) induced by polyethyleneglycol, in conjunction with relatively high (H) and low (L) natural (13)C-abundance of NaHCO3-labeled treatments in hydroponics for 14 days...
June 16, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28617978/enantioselective-determination-of-r-manidipine-and-s-manidipine-in-human-plasma-by-a-sensitive-and-selective-chiral-lc-ms-ms-assay
#17
Vinayender Adireddy, Bhavani Prasanna Kumar Bimireddy, Venkateswarlu Ponneri
A sensitive and selective liquid chromatography-tandem mass spectrometric (LC-MS/MS) assay method has been developed and validated for the enantioselective determination of manidipine in human plasma using isotope labeled compounds as internal standards. After solid phase extraction, R-(-)-manidipine and S-(+)-manidipine were chromatographed on a Chiralpack IC-3 C18 column using a isocratic mobile phase composed of 2mM ammonium bicarbonate and acetonitrile (15:85, v/v). The precursor ion to product ion transitions for the enantiomers and internal standards were monitored in the multiple reaction monitoring and positive ionization mode using a API-4000 mass spectrometer...
June 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28617146/diospyros-rhodocalyx-tako-na-a-thai-folk-medicine-associated-with-hypokalemia-and-generalized-muscle-weakness-a-case-series
#18
Rittirak Othong, Satariya Trakulsrichai, Winai Wananukul
INTRODUCTION: Diospyros rhodocalyx (Tako-Na) is a Thai folk medicine purported to promote longevity, treat impotence, etc. We present patients with hypokalemia, weakness and hypertension after consuming Tako-Na tea. CASE SERIES: Case 1: A 61-year-old man was brought in nine hours after drinking 400-500 mL of Tako-Na tea. One handful of Tako-Na bark was boiled in water to make tea. He had vomiting and watery diarrhea six hours after drinking it. He took no medications and had no history of hypertension...
June 15, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28615486/acid-base-physiology-neurobiology-and-behaviour-in-relation-to-co2-induced-ocean-acidification
#19
REVIEW
Martin Tresguerres, Trevor J Hamilton
Experimental exposure to ocean and freshwater acidification affects the behaviour of multiple aquatic organisms in laboratory tests. One proposed cause involves an imbalance in plasma chloride and bicarbonate ion concentrations as a result of acid-base regulation, causing the reversal of ionic fluxes through GABAA receptors, which leads to altered neuronal function. This model is exclusively based on differential effects of the GABAA receptor antagonist gabazine on control animals and those exposed to elevated CO2 However, direct measurements of actual chloride and bicarbonate concentrations in neurons and their extracellular fluids and of GABAA receptor properties in aquatic organisms are largely lacking...
June 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28613960/the-effect-of-air-pollution-on-diurnal-variation-of-performance-in-anaerobic-tests-cardiovascular-and-hematological-parameters-and-blood-gases-on-soccer-players-following-the-yo-yo-intermittent-recovery-test-level-1
#20
Nesrin Boussetta, Salma Abedelmalek, Khouloud Aloui, Nizar Souissi
This study aimed to investigate the effect of air pollution on diurnal variation of performance in anaerobic tests, cardiovascular and hematological parameters, and blood gases on soccer players following the Yo-Yo Intermittent Recovery Test Level-1 (YYIRT1). In a randomized order, 11 healthy soccer players (mean age: 21.8 [range: 20-24] years; height: 178.00 [range: 1.64-1.83] cm; body mass index [BMI]: 23.57 [range: 20.45-28.03] kg.m(-2)) performed a YYIRT1 at two different times of day (TOD) (08:00 h and 18:00 h) in two areas (i...
June 14, 2017: Chronobiology International
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