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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/28535116/is-mannitol-the-treatment-of-choice-for-patients-with-ciguatera-fish-poisoning
#2
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/28530796/what-do-laser-induced-transient-techniques-reveal-for-batteries-na-and-k-intercalation-from-aqueous-electrolytes-as-an-example
#3
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/28530007/preventive-effect-of-cpp-acpf-paste-and-fluoride-toothpastes-against-erosion-and-erosion-plus-abrasion-%C3%A2-in-vitro-a-3d-profilometric-analysis
#4
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/28529463/nutrition-practices-and-knowledge-among-ncaa-division-iii-football-players
#5
Elizabeth Lea Abbey, Cynthia Joy Wright, Christina M Kirkpatrick
BACKGROUND: Participation in collegiate American football is physically demanding and may have long-term health implications, particularly in relation to cardiovascular and neurological health. National Collegiate Athletic Association (NCAA) Division III (DIII) football players are a relatively unstudied population, particularly in terms of their dietary habits and knowledge. The aim of the present study was to descriptively evaluate the dietary intake of DIII football players including a subset of linemen and assess the nutritional knowledge and sources of information of these athletes...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28528669/modulation-of-ion-channels-by-cysteine-rich-peptides-from-sequence-to-structure
#6
Mehdi Mobli, Eivind A B Undheim, Lachlan D Rash
Venom peptides are natural ligands of ion channels and have been used extensively in pharmacological characterization of various ion channels and receptors. In this chapter, we survey all known venom peptide ion-channel modulators. Our survey reveals that the majority of venom peptides characterized to date target voltage-gated sodium or potassium channels. We further find that the majority of these peptides are found in scorpion and spider venoms. We discuss the influence of the pharmacological tools available in biasing discovery and the classical "toxin-to-sequence" approach to venom peptide biodiscovery...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28528235/mapping-natural-radioactivity-of-soil-samples-in-different-regions-of-punjab-india
#7
Komal Saini, B S Bajwa
Thallium activated sodium iodide (NaI(Tl)) detector and multi channel analyzer has been utilized to measure gamma rays emitted by radio nuclides found in soil samples of south-west (SW) region of Punjab state, India where elevated level of uranium of around value of 700µg/l in groundwater has been reported. For comparative study, soil samples were also collected and analyzed from west (W) and north east (NE) regions of the state. Uranium and potassium has been found to be comparatively higher in SW region whereas thorium level is higher in W and NE part of Punjab state...
May 13, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28527993/feasible-protein-aggregation-of-phosphorylated-poly-%C3%AE-glutamic-acid-derivative-from-bacillus-subtilis-natto
#8
Osamu Kurita, Toru Sago, Kaori Umetani, Yasushi Kokean, Chizuru Yamaoka, Nobuyuki Takahashi, Hiroyuki Iwamoto
Poly-γ-glutamic acid (PGA) was modified with phosphorylating agents such as sodium metaphosphate and potassium metaphosphate in the culture medium of Bacillus subtilis (natto). The highly phosphorylated PGA derivatives were prepared and investigated for their chemical and physicochemical properties. The PGA derivatives had approximately 7% (W/W) inorganic phosphorus and characteristic absorbance PO2(-) bands at 1082cm(-1) and 1260cm(-1) by Fourier Transform Infrared Spectroscopy. The derivative modified by sodium metaphosphate (J-5) was easily hydrated in water and had extremely low viscosity...
May 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28527083/shared-mechanisms-of-epilepsy-migraine-and-affective-disorders
#9
Davide Zarcone, Simona Corbetta
Since the nineteenth century several clinical features have been observed in common between migraine and epilepsy (such as episodic attacks, triggering factors, presence of aura, frequent familiarity), but only in recent years researchers have really engaged in finding a common pathogenic mechanism. From studies of disease incidence, we understand how either migraine among patients with epilepsy or epilepsy among migraine patients are more frequent than in the general population. This association may result from a direct causality, by the same environmental risk factors and/or by a common genetic susceptibility...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28526387/adequacy-of-nutrient-intake-in-women-with-restrictive-anorexia-nervosa
#10
Chiara Chiurazzi, Iolanda Cioffi, Carmela De Caprio, Emilia De Filippo, Maurizio Marra, Rosa Sammarco, Maria Luisa Di Guglielmo, Franco Contaldo, Fabrizio Pasanisi
OBJECTIVE: The aim of the present study was to assess energy and nutrient intake in a group of women with restrictive AN (r-AN) compared with a control group. METHODS: Thirteen r-AN patients and 13 healthy female controls completed 7-d food records. Intake of macro- and micronutrients was compared between the two groups as well as to the Dietary Reference Intake for the Italian Population (LARN) for specific ages. Additionally, the r-AN patients underwent indirect calorimetry for measuring resting energy expenditure (REE)...
June 2017: Nutrition
https://www.readbyqxmd.com/read/28523598/study-on-the-interaction-of-chromate-with-bovine-serum-albumin-by-spectroscopic-method
#11
Hongguang Cao, Yanli Yi
The interaction between two chromates [sodium chromate (Na2CrO4) and potassium chromate K2CrO4)] and bovine serum albumin (BSA) in physiological buffer (pH 7.4) was investigated by the fluorescence quenching technique. The results of fluorescence titration revealed that two chromates could strongly quench the intrinsic fluorescence of BSA through a static quenching procedure. The apparent binding constants K and number of binding sites n of chromate with BSA were obtained by the fluorescence quenching method...
May 18, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28523441/progress-in-the-presence-of-failure-updates-in-chronic-systolic-heart-failure-management
#12
REVIEW
Katie M Murphy, Julie L Rosenthal
The therapeutic heart failure armamentarium has evolved from drugs to transplantation to devices through further understanding of its complex pathophysiology and pathogenesis. Current medications capitalize on our evolving understanding of the sympathetic and renin-angiotensin-aldosterone systems that subsequently promote both beneficial and maladaptive responses that ultimately yield a decrease in cardiac function. Despite these advancements, the prevalence of heart failure continues to rise and carries a significant burden on our patients and health care system...
July 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28522431/wnk1-and-p38-mapk-distribution-in-ionocytes-and-accessory-cells-of-euryhaline-teleost-fish-implies-ionoregulatory-function
#13
W S Marshall, R R F Cozzi, M Spieker
Ionocytes of euryhaline teleost fish secrete NaCl, under regulation by serine and threonine kinases, including with-no-lysine kinase (WNK1) and p38 mitogen-activated protein kinase (MAPK). Mummichogs (Fundulus heteroclitus L.) were acclimated to freshwater (FW), full strength seawater (SW) and hypersaline conditions (2SW). Immunocytochemistry of ionocytes in opercular epithelia of fish acclimated to SW and 2SW revealed that WNK1-anti-pT58 phosphoantibody localized strongly to accessory cells and was present in the cytosol of ionocytes close to, cystic fibrosis transmembrane conductance regulator (CFTR) in the apical membrane and sodium, potassium, 2 chloride cotransporter (NKCC) in basolateral membrane...
May 18, 2017: Biology Open
https://www.readbyqxmd.com/read/28522248/adverse-effects-in-kidney-function-antioxidant-systems-and-histopathology-in-rats-receiving-monosodium-glutamate-diet
#14
María Del Carmen Contini, Ana Fabro, Néstor Millen, Adriana Benmelej, Stella Mahieu
We investigated the effects of adding of monosodium glutamate (MSG) to a standard diet on oxidative stress in kidney, nitric oxide excretion, renal ions handling and blood pressure. We examined the association of these changes with the effects on renal histology. The study was performed on male Wistar rats (5 weeks old) divided into 3 groups: 1) MSG group were fed a diet supplemented with 3g of MSG/kg b.w./day, five days a week, and spontaneous ingestion of a 1% MSG solution during 16 weeks; 2) NaCl group were fed a diet with NaCl (1g/kg b...
May 15, 2017: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/28520883/effect-of-isotonic-versus-hypotonic-maintenance-fluid-therapy-on-urine-output-fluid-balance-and-electrolyte-homeostasis-a-crossover-study-in-fasting-adult-volunteers
#15
N Van Regenmortel, T De Weerdt, A H Van Craenenbroeck, E Roelant, W Verbrugghe, K Dams, M L N G Malbrain, T Van den Wyngaert, P G Jorens
Background.: Daily and globally, millions of adult hospitalized patients are exposed to maintenance i.v. fluid solutions supported by limited scientific evidence. In particular, it remains unclear whether fluid tonicity contributes to the recently established detrimental effects of fluid, sodium, and chloride overload. Methods.: This crossover study consisted of two 48 h study periods, during which 12 fasting healthy adults were treated with a frequently prescribed solution (NaCl 0...
May 16, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28515174/functional-assessment-of-sodium-chloride-co-transporter-ncc-mutants-in-polarized-mammalian-epithelial-cells
#16
Lena Lindtoft Rosenbaek, Federica Rizzo, Nanna MacAulay, Olivier Staub, Robert A Fenton
The thiazide-sensitive sodium chloride co-transporter, NCC, is important for maintaining serum sodium (Na+) and, indirectly, serum potassium (K+) levels. Functional studies on NCC have used cell lines with native NCC expression, transiently transfected non-polarized cell lines or Xenopus laevis oocytes. Here, we developed polarized Madin-Darby canine kidney type I (MDCKI) mammalian epithelial cell lines with tetracycline-inducible human NCC expression to study NCC activity and membrane abundance in the same system...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28514699/profiling-of-illicit-cocaine-seized-in-china-by-icp-ms-analysis-of-inorganic-elements
#17
Cuimei Liu, Zhendong Hua, Xin Meng
For the first time in China, the inorganic element profiling of cocaine specimens was performed at the National Narcotics Laboratory. An inductive coupled plasma-mass spectrometry (ICP-MS) method was developed and validated for simultaneous analysis of 26 inorganic elements, including sodium (Na), magnesium (Mg), aluminuim (Al), potassium (K), calcium (Ca), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), selenium (Se), molybdenum (Mo), silver (Ag), cadmium (Cd), antimony (Sb), barium (Ba), lanthanum (La), cerium (Ce), thallium (Tl), lead (Pb), thorium (Th), and uranium (U) in illicit cocaine samples...
April 29, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28514635/specialization-to-extremely-low-nutrient-soils-limits-the-nutritional-adaptability-of-plant-lineages
#18
G Anthony Verboom, William D Stock, Michael D Cramer
Specialization to extreme selective situations promotes the acquisition of traits whose coadaptive integration may compromise evolutionary flexibility and adaptability. We test this idea in the context of the foliar stoichiometry of plants native to the South African Cape. Whereas foliar concentrations of nitrogen, phosphorus (P), potassium (K), calcium, magnesium, and sodium showed strong phylogenetic signal, as did the foliar ratios of these nutrients to P, the same was not true of the corresponding soil values...
June 2017: American Naturalist
https://www.readbyqxmd.com/read/28514017/isopimaric-acid-a-multi-targeting-ion-channel-modulator-reducing-excitability-and-arrhythmicity-in-a-spontaneously-beating-mouse-atrial-cell-line
#19
Sajjad Salari, Malin Silverå Ejneby, Johan Brask, Fredrik Elinder
AIM: Atrial fibrillation is the most common persistent cardiac arrhythmia, and it is not well controlled by present drugs. Because some resin acids open voltage-gated potassium channels and reduce neuronal excitability, we explored the effects of the resin acid isopimaric acid (IPA) on action potentials and ion currents in cardiomyocytes. METHODS: Spontaneously beating mouse atrial HL-1 cells were investigated with the whole-cell patch-clamp technique. RESULTS: 1-25 μmol L(-1) IPA reduced the action potential frequency by up to 50%...
May 17, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28513067/interventions-for-cutaneous-molluscum-contagiosum
#20
REVIEW
Johannes C van der Wouden, Renske van der Sande, Emma J Kruithof, Annet Sollie, Lisette Wa van Suijlekom-Smit, Sander Koning
BACKGROUND: Molluscum contagiosum is a common skin infection that is caused by a pox virus and occurs mainly in children. The infection usually resolves within months in people without immune deficiency, but treatment may be preferred for social and cosmetic reasons or to avoid spreading the infection. A clear evidence base supporting the various treatments is lacking.This is an update of a Cochrane Review first published in 2006, and updated previously in 2009. OBJECTIVES: To assess the effects of specific treatments and management strategies, including waiting for natural resolution, for cutaneous, non-genital molluscum contagiosum in people without immune deficiency...
May 17, 2017: Cochrane Database of Systematic Reviews
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