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https://www.readbyqxmd.com/read/28535530/mathematical-model-of-potassium-profiling-in-chronic-dialysis
#1
Mauro Ursino, Gabriele Donati
Potassium balance is a difficult task in hemodialysis: low potassium in the dialysate is associated with a high risk of sudden cardiac death, whereas excessive dialysate potassium may provoke insufficient removal and hyperkalemia. A better understanding of the problem can be achieved with the use of mathematical models of solute kinetics. This study is aimed at presenting an improved model of solute kinetics and fluid shifts during hemodialysis. It comprises a 2-compartment (intracellular and extracellular) description of sodium, potassium, and urea, including volume fluid shifts induced by osmotic forces...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28535124/serum-creatinine-and-cystatin-c-provide-conflicting-evidence-of-acute-kidney-injury-following-acute-ingestion-of-potassium-permanganate-and-oxalic-acid
#2
Thilini Madushanka Wijerathna, Indika Bandara Gawarammana, Dhammika Menike Dissanayaka, Chathura Palanagasinghe, Fathima Shihana, Gihani Dassanayaka, Seyed Shahmy, Zoltan Huba Endre, Fahim Mohamed, Nicholas Alan Buckley
AIM: Acute kidney injury (AKI) is common following deliberate self-poisoning with a combination washing powder containing oxalic acid (H2C2O4) and potassium permanganate (KMnO4). Early and rapid increases in serum creatinine (sCr) follow severe poisoning. We investigated the relationship of these increases with direct nephrotoxicity in an ongoing multicenter prospective cohort study in Sri Lanka exploring AKI following poisoning. METHODS: Multiple measures of change in kidney function were evaluated in 48 consenting patients who had serial sCr and serum cystatin C (sCysC) data available...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28535116/is-mannitol-the-treatment-of-choice-for-patients-with-ciguatera-fish-poisoning
#3
Michael E Mullins, Robert S Hoffman
CONTEXT: Ciguatera fish poisoning arises primarily from consumption of carnivorous reef fish caught in tropical and sub-tropical waters. Ciguatoxins, a class of tasteless, heat-stable, polycyclic toxins produced by dinoflagellates, accumulate through the food chain and concentrate in various carnivorous fish, such as groupers, barracudas, wrasses, amberjack, kingfishes, and eels. Characteristics of ciguatera fish poisoning include early nausea, vomiting, and diarrhea in the first one to two days post ingestion, followed by the appearance of sensory disturbances...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28534862/differences-in-gene-expression-profiles-between-early-and-late-isolates-in-monospecies-achromobacter-biofilm
#4
Signe M Nielsen, Rikke L Meyer, Niels Nørskov-Lauritsen
Bacteria of genus Achromobacter are emerging pathogens in cystic fibrosis (CF) capable of biofilm formation and development of antimicrobial resistance. Evolutionary adaptions in the transition from primary to chronic infection were assessed by transcriptomic analysis of successive isolates of Achromobacter xylosoxidans from a single CF patient. Several efflux pump systems targeting antimicrobial agents were upregulated during the course of the disease, whereas all genes related to motility were downregulated...
May 19, 2017: Pathogens
https://www.readbyqxmd.com/read/28534679/laser-induced-photofragmentation-fluorescence-imaging-of-alkali-compounds-in-flames
#5
Tomas Leffler, Christian Brackmann, Marcus Aldén, Zhongshan Li
Laser-induced photofragmentation fluorescence has been investigated for the imaging of alkali compounds in premixed laminar methane-air flames. An ArF excimer laser, providing pulses of wavelength 193 nm, was used to photodissociate KCl, KOH, and NaCl molecules in the post-flame region and fluorescence from the excited atomic alkali fragment was detected. Fluorescence emission spectra showed distinct lines of the alkali atoms allowing for efficient background filtering. Temperature data from Rayleigh scattering measurements together with simulations of potassium chemistry presented in literature allowed for conclusions on the relative contributions of potassium species KOH and KCl to the detected signal...
June 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28534481/structural-water-engaged-disordered-vanadium-oxide-nanosheets-for-high-capacity-aqueous-potassium-ion-storage
#6
Daniel Scott Charles, Mikhail Feygenson, Katharine Page, Joerg Neuefeind, Wenqian Xu, Xiaowei Teng
Aqueous electrochemical energy storage devices using potassium-ions as charge carriers are attractive due to their superior safety, lower cost and excellent transport properties compared to other alkali ions. However, the accommodation of potassium-ions with satisfactory capacity and cyclability is difficult because the large ionic radius of potassium-ions causes structural distortion and instabilities even in layered electrodes. Here we report that water induces structural rearrangements of the vanadium-oxygen octahedra and enhances stability of the highly disordered potassium-intercalated vanadium oxide nanosheets...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28533793/exogenous-supplementation-of-silicon-improved-the-recovery-of-hyperhydric-shoots-in-dianthus-caryophyllus-l-by-stabilizing-the-physiology-and-protein-expression
#7
Prabhakaran Soundararajan, Abinaya Manivannan, Yoon S Cho, Byoung R Jeong
Hyperhydricity is one of the major problems hindering in vitro propagation of Dianthus caryophyllus L. Silicon (Si) is a well-known beneficial element renowned for its stress amelioration properties in plants. This study has demonstrated the physiological and molecular mechanism behind the Si-mediated recovery from hyperhydricity in D. caryophyllus L. 'Green Beauty'. Four weeks old hyperhydric shoots obtained from temporary immersion system were cultured on the Murashige and Skoog medium supplemented with 0 (control), 1...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28533267/the-kv1-associated-molecules-tag-1-and-caspr2-are-selectively-targeted-to-axon-initial-segment-in-hippocampal-neurons
#8
Delphine Pinatel, Bruno Hivert, Margaux Saint-Martin, Nelly Noraz, Maria Savvaki, Domna Karagogeos, Catherine Faivre-Sarrailh
Caspr2 and TAG-1 are cell adhesion molecules (CAMs) associated with the voltage-gated potassium channels Kv1.1/1.2 at regions controlling axonal excitability, the axon initial segment (AIS) and juxtaparanodes of myelinated axons. The distribution of Kv1 at juxtaparanodes requires axo-glial contacts mediated by Caspr2 and TAG-1. In the present study, we showed that TAG-1 strongly co-localizes with Kv1.2 at the AIS of cultured hippocampal neurons whereas Caspr2 is uniformly expressed along the axolemma. Live-cell imaging revealed that Caspr2 and TAG-1 are sorted together in axonal transport vesicles...
May 22, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28532805/efficacy-of-disinfectants-and-detergents-intended-for-a-pig-farm-environment-where-salmonella-is-present
#9
Rebecca J Gosling, Ian Mawhinney, Kelly Vaughan, Robert H Davies, Richard P Smith
Disinfection is a useful component of disease control, although products and chemical groups vary in their activity against different pathogens. This study investigated the ability of fifteen disinfectants to eliminate pig-associated Salmonella. Active compounds of products included chlorocresol, glutaraldehyde/formaldehyde, glutaraldehyde/quaternary ammonium compounds (QAC), iodine, peracetic acid and potassium peroxomonosulphate. Six detergents were also tested for their ability to dislodge faecal material, and interactions with specific disinfectants...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28531901/a-comparison-between-intermittent-peritoneal-dialysis-and-automatic-peritoneal-dialysis-on-urgent-peritoneal-dialysis
#10
Chang Wang, Xiao Fu, Yuan Yang, Jun Deng, Hong-Qing Zhang, Hong-Mei Deng, Jia Lu, Youming Peng, Hong Liu, Fu-You Liu, Yinghong Liu
BACKGROUND: Urgent-start dialysis is a major problem for incident dialysis population. Urgent start on hemodialysis is associated with an increased risk of infectious or mechanical complications, and its mortality is equal to or higher than that of urgent start on peritoneal dialysis (PD). However, compared to patients starting PD in a planned setting, those on urgent-started PD have an increased risk of mechanical complications and lower technique survival. METHODS: In this study, 101 adult incident dialysis patients (≥18 years old) who underwent Tenckhoff catheter implantation were enrolled...
May 23, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28531850/in-situ-injection-of-potassium-hydroxide-into-briquetted-wheat-straw-and-meadow-grass-effect-on-biomethane-production
#11
Lu Feng, Veronica Moset, Wanwu Li, Chang Chen, Henrik Bjarne Møller
Alkaline pretreatment of lignocellulosic biomass has been intensively investigated but heavy water usage and environmental pollution from wastewater limits its industrial application. This study presents a pretreatment technique by in-situ injection of potassium hydroxide concentrations ranging from 0.8% to 10% (w/w) into the briquetting process of wheat straw and meadow grass. Results show that the biomethane yield and hydrolysis rate was improved significantly with a higher impact on wheat straw compared to meadow grass...
May 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531788/association-of-dietary-factors-with-severity-of-coronary-artery-disease
#12
Namita Mahalle, M K Garg, S S Naik, M V Kulkarni
BACKGROUND: Cardiovascular disease has taken epidemic proportions during past decades. Cardiovascular risk factors contribute to progression of coronary lesions, worsening the patient's prognosis. This study was planned to analyze the association of dietary factors with severity of coronary artery disease (CAD) in Indian patients. METHODS: Three hundred patients with known coronary disease above the age of 25 years were included in this study. Blood samples were collected for biochemical markers...
October 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531643/lipid-based-nutrient-supplements-containing-vitamins-and-minerals-attenuate-renal-electrolyte-loss-in-hiv-aids-patients-starting-antiretroviral-therapy-a-randomized-controlled-trial-in-zambia
#13
D Munkombwe, T L Muungo, C Michelo, P Kelly, S Chirwa, S Filteau
BACKGROUND & AIMS: Advanced HIV infection combined with undernutrition and antiretroviral therapy (ART) places HIV/AIDS patients at high risk of electrolyte abnormalities and increased morbidity and mortality. Here, in a sub-study of a large published randomized trial, we evaluated if nutritional supplements will help curtail renal electrolyte loss in HIV/AIDS patients starting ART. METHODS: 130 malnourished HIV-positive patients referred for ART received lipid-based nutrient supplements alone (LNS, n = 63) or together with vitamins and minerals (LNS-VM, n = 67)...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531119/quality-attributes-and-in-vitro-bioequivalence-of-different-brands-of-amoxicillin-trihydrate-tablets
#14
Moawia M Al-Tabakha, Khairi M S Fahelelbom, Dana Emad Eddin Obaid, Sadik Sayed
Bacterial resistance and antibiotic drug effectiveness can be related to administering generic products with a subtherapeutic dose or poor in vivo drug release. The aim of this study was to investigate whether locally marketed amoxicillin tablets have the required chemical and physical attributes, including in vitro bioequivalence performance. Five generic products (T1, T2, T3, T4, and T5) containing combination of amoxicillin trihydrate and potassium clavulanate as 1 g strength present in immediate release tablets were compared to the reference listed drug product Augmentin® (R) for weight variation, friability, resistance to crushing, and chemical content of amoxicillin...
May 20, 2017: Pharmaceutics
https://www.readbyqxmd.com/read/28530796/what-do-laser-induced-transient-techniques-reveal-for-batteries-na-and-k-intercalation-from-aqueous-electrolytes-as-an-example
#15
Daniel Scieszka, Jeongsik Yun, Aliaksandr S Bandarenka
Technological advancement has been revolutionized by rechargeable batteries, without which the use of various modern devices would not be possible. Aqueous Na-ion batteries have lately garnered much attention, being rec-ognized as a promising alternative to the commonly used Li-ion batteries for the large-scale energy storage systems. However, further improvement and optimization of such systems require a more detailed understanding of intercalation mechanisms. In this work, we for the first time demonstrate implementation of the laser induced current transient (LICT) technique for in-situ characterization of battery systems and investigate the interface between Na2Ni[Fe(CN)6] model battery electrodes in contact with aqueous electrolytes...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28530170/k-modulates-genetic-competence-and-the-stress-regulon-of-streptococcus-mutans
#16
Gursonika Binepal, Iwona B Wenderska, Paula Crowley, Richard N Besingi, Dilani B Senadheera, L Jeannine Brady, Dennis G Cvitkovitch
Potassium (K+) is the most abundant cation in dental plaque fluid. Previously, we reported the link between K+ transport via Trk2 in Streptococcus mutans and its two critical virulence attributes: acid tolerance and surface adhesion. Herein, we build further on the intimate link between K+ levels and S. mutans biology. High (>25 mM) versus low (≤5 mM) K+ concentrations in the growth medium affected conformational epitopes of cell surface-localized adhesin P1. At low K+, the expression of stress response elements gcrR and codY, cell-adhesion-associated genes such as spaP and metabolism-associated genes such as bglP was induced at stationary phase (P<0...
May 22, 2017: Microbiology
https://www.readbyqxmd.com/read/28530007/preventive-effect-of-cpp-acpf-paste-and-fluoride-toothpastes-against-erosion-and-erosion-plus-abrasion-%C3%A2-in-vitro-a-3d-profilometric-analysis
#17
Genaina Guimarães Soares, Pâmela Amorim Magalhães, Ana Beatriz Monteiro Fonseca, Monica Almeida Tostes, Eduardo Moreira da Silva, Thereza Christina Lopes Coutinho
PURPOSE: To evaluate the effect of CPP-ACPF paste and fluoride toothpastes on enamel subjected to erosion and erosion plus abrasion in vitro. MATERIALS AND METHODS: A total of 220 human enamel blocks were divided into eleven groups (n = 20): CPP-ACPF paste (MPP), potassium nitrate/sodium fluoride toothpaste (PE), sodium fluoride toothpaste (FD), fluoride-free toothpaste (SO) and control (erosion only with no paste or toothpastes; CO) according to the experimental design: erosion or erosion plus abrasion immediately after erosion (ERO+I-ABR) or 30 min after erosion (ERO+30min-ABR)...
May 19, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28529996/multiplexed-sub-doppler-spectroscopy-with-an-optical-frequency-comb
#18
D A Long, A J Fleisher, D F Plusquellic, J T Hodges
An optical frequency comb generated with an electro-optic phase modulator and a chirped radiofrequency waveform is used to perform pump-probe spectroscopy on the D1 and D2 transitions of atomic potassium at 770.1 nm and 766.7 nm, respectively. With a comb tooth spacing of 200 kHz and an optical bandwidth of 2 GHz the hyperfine transitions can be simultaneously observed. Interferograms are recorded in as little as 5 μs (a timescale corresponding to the inverse of the comb tooth spacing). Importantly, the sub-Doppler features can be measured as long as the laser carrier frequency lies within the Doppler profile, thus removing the need for slow scanning or a priori knowledge of the frequencies of the sub-Doppler features...
December 2016: Physical Review. A
https://www.readbyqxmd.com/read/28529735/rosehip-inhibits-xanthine-oxidase-activity-and-reduces-serum-urate-levels-in-a-mouse-model-of-hyperuricemia
#19
Hidetomo Kikuchi, Satomi Kogure, Rie Arai, Kouki Saino, Atsuko Ohkubo, Tadashi Tsuda, Katsuyoshi Sunaga
Rosehip, the fruit of Rosa canina L., has traditionally been used to treat urate metabolism disorders; however, its effects on such disorders have not been characterized in detail. Therefore, the present study investigated the effects of hot water, ethanol and ethyl acetate extracts of rosehip on xanthine oxidase (XO) activity in vitro. In addition, the serum urate lowering effects of the rosehip hot water extract in a mouse model of hyperuricemia (male ddY mice, which were intraperitoneally injected with potassium oxonate) were investigated...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28529700/effect-of-citrus-based-products-on-urine-profile-a-systematic-review-and-meta-analysis
#20
Fakhri Rahman, Ponco Birowo, Indah S Widyahening, Nur Rasyid
Background. Urolithiasis is a disease with high recurrence rate, 30-50% within 5 years. The aim of the present study was to learn the effects of citrus-based products on the urine profile in healthy persons and people with urolithiasis compared to control diet and potassium citrate.  Methods. A systematic review was performed, which included interventional, prospective observational and retrospective studies, comparing citrus-based therapy with standard diet therapy, mineral water, or potassium citrate. A literature search was conducted using PUBMED, COCHRANE, and Google Scholar with "citrus or lemonade or orange or grapefruit or lime or juice" and "urolithiasis" as search terms...
2017: F1000Research
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