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https://www.readbyqxmd.com/read/28437099/surfactant-1-hexadecyl-3-methylimidazolium-chloride-can-convert-one-dimensional-viologen-bromoplumbate-into-zero-dimensional
#1
Guangfeng Liu, Jie Liu, Lina Nie, Rui Ban, Gerasimos S Armatas, Xutang Tao, Qichun Zhang
A zero-dimensional N,N'-dibutyl-4,4'-dipyridinium bromoplumbate, [BV]6[Pb9Br30], with unusual discrete [Pb9Br30](12-) anionic clusters was prepared via a facile surfactant-mediated solvothermal process. This bromoplumbate exhibits a narrower optical band gap relative to the congeneric one-dimensional viologen bromoplumbates.
April 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28420042/determination-of-reference-intervals-of-acid-base-parameters-in-clinically-healthy-dogs
#2
Ivana Vanova-Uhrikova, Leona Rauserova-Lexmaulova, Kristina Rehakova, Peter Scheer, Jaroslav Doubek
OBJECTIVE: To establish reference intervals for traditionally- and Stewart's approach-determined acid-base parameters in a population of clinically healthy dogs. DESIGN: Prospective study (June 2011-September 2012). SETTING: Veterinary teaching hospital. ANIMALS: Two hundred twenty-four client-owned, clinically healthy dogs. INTERVENTIONS: Blood was collected from the jugular vein and the dorsal pedal artery...
April 18, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28419895/electrochemical-oxidation-of-iron-and-alkalinity-generation-for-efficient-sulfide-control-in-sewers
#3
Hui-Wen Lin, Caroline Kustermans, Eleni Vaiopoulou, Antonin Prévoteau, Korneel Rabaey, Zhiguo Yuan, Ilje Pikaar
The addition of iron salts is one of the most commonly used dosing strategies for sulfide control in sewers. However, iron salts decrease the sewage pH which not only reduces the effectiveness of sulfide precipitation but also enhances the release of residual sulfide to the sewer atmosphere. Equally important, concentrated iron salt solutions are corrosive and their frequent transport, handling, and on-site storage often come with Occupational Health and Safety (OH&S) concerns. Here, we experimentally demonstrated a novel sulfide control approach using electrochemical systems with parallel placed iron electrodes...
April 15, 2017: Water Research
https://www.readbyqxmd.com/read/28414977/design-of-the-magnetic-homonuclear-bonds-boron-nitride-nanosheets-using-dft-methods
#4
E Chigo Anota, A Bautista Hernández, A Escobedo Morales, M Castro
Design and characterization of the structural, electronic, and magnetic properties of armchair boron-nitride, BN (B27N27H18), nanosheets were performed by means of density functional theory all-electron calculations. The HSEh1PBE-GGA method together with 6-31G(d) basis sets were used. Non-stoichiometric B30N24H18 and B24N30H18 compositions: rich in boron or nitrogen atoms, forming homonuclear B or N bonds, respectively, were chosen. The obtained results reveal that these BN nanosheets reach structural stability in the anionic form, where semiconductor and magnetic behaviors are promoted...
March 30, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28414668/autoimmune-diabetes-presented-with-diabetic-ketoacidosis-induced-by-immunotherapy-in-an-adult-with-melanoma
#5
A A Alzenaidi, J Dendy, L Rejjal
INTRODUCTION: Immunotherapy has been approved for treatment of melanoma. Autoimmune endocrinopathies have been reported in trials involving immunotherapy but autoimmune diabetes has not been definitively linked to them. Here we describe a case of autoimmune diabetes presenting with DKA after receiving combined immunotherapy with anti-CTLA4 and anti-PD1 monoclonal antibodies. CASE: A 47year old gentleman with metastatic melanoma presented to our institution with confusion, abdominal pain and decreased oral intake...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28405069/acquired-5-oxoproline-acidemia-successfully-treated-with-n-acetylcysteine
#6
Gregory L Hundemer, Andrew Z Fenves
Acquired 5-oxoprolinemia is increasingly recognized as a cause of anion gap metabolic acidosis. It predominantly occurs in chronically ill, malnourished women with impaired renal function and chronic acetaminophen ingestion. Depletion of glutathione and cysteine stores leads to elevated 5-oxoproline levels. N-acetylcysteine, given its effect in repleting glutathione and cysteine stores, has been proposed as a potential treatment for 5-oxoprolinemia, though reports of its successful use are lacking. We present a case of 5-oxoproline metabolic acidosis that persisted despite discontinuation of acetaminophen...
April 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28401198/the-significance-of-strong-ion-gap-for-predicting-return-of-spontaneous-circulation-in-patients-with-cardiopulmonary-arrest
#7
Minoru Kaneko, Shuichi Hagiwara, Makoto Aoki, Masato Murata, Jun Nakajima, Kiyohiro Oshima
Useful parameters that can predict return of spontaneous circulation (ROSC) in patients with cardiopulmonary arrest (CPA) have not been established. We previously reported the usefulness of anion gap (AG) and albumin-corrected anion gap (ACAG) calculated from a blood sample obtained on arrival at the hospital for the prediction of ROSC. Otherwise, it has been reported that strong ion gap (SIG), which shows the difference between the levels of fully dissociated cations and anions in the serum, is useful to predict the prognosis of critically ill patients...
January 2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28401058/a-rare-cause-of-recurrent-acute-pancreatitis-in-a-child-isovaleric-acidemia-with-novel-mutation
#8
Elif Sag, Alper Han Cebi, Gulay Kaya, Gulay Karaguzel, Murat Cakir
Recurrent acute pancreatic attacks is a rare clinical condition (2-5% of all acute pancreatis) in children and is mainly idiopathic in most cases. Sometimes it may be associated with congenital anomalies, metabolic diseases or hereditary conditions. Isovaleric acidemia (IVA) is a rare autosomal recessive amino acid metabolism disorder associated with isovaleryl coenzyme A dehydrogenase deficiency presenting the clinical findings such metabolic acidosis with increased anion gap, hyperammonemia, ketonemia, hypoglycemia, "the odor of sweaty feet," abdominal pain, vomiting, feeding intolerance, shock and coma...
March 2017: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/28400704/effects-of-dystocia-on-blood-gas-parameters-acid-base-balance-and-serum-lactate-concentration-in-heavy-draft-newborn-foals
#9
Yuki Kimura, Takahiro Aoki, Akiko Chiba, Yasuo Nambo
Dystocia is often lethal for neonatal foals; however, its clinicopathological features remain largely unknown. We investigated the effect of dystocia on the foal blood profile. Venous blood samples were collected from 35 foals (5 Percheron and 30 crossbreds between Percheron, Belgian, and Breton heavy draft horses) at 0 hr, 1 hr, 12 hr and 1 day after birth. Dystocia was defined as prolonged labor >30 min with strong fetal traction with or without fetal displacement. The dystocia group (n=13) showed lower mean values for pH (P<0...
2017: Journal of Equine Science
https://www.readbyqxmd.com/read/28397502/ambient-carbon-dioxide-capture-using-boron-rich-porous-boron-nitride-a-theoretical-study
#10
Lanlan Li, Yan Liu, Xiaojing Yang, Xiaofei Yu, Yi Fang, Qiaoling Li, Peng Jin, Chengchun Tang
The development of highly efficient sorbent materials for CO2 capture at ambient conditions is of great importance for reducing the impact of CO2 on the environment and climate change. In this account, strong CO2 adsorption on boron antisite (BN) in boron-rich porous boron nitrides (p-BN) was developed and studied. The results indicated that the material achieved larger adsorption energies of 2.09 eV (201.66 kJ/mol, PBE-D). The electronic structure calculations suggested that the introduction of BN in p-BN induced defect electronic states in the energy gap region, which strongly impacted the adsorption properties of the material...
April 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28395879/determination-of-tissue-hypoxia-by-physicochemical-approach-in-premature-anemia
#11
Zeliha Özdemir, Birgin Törer, Deniz Hanta, Bilin Cetinkaya, Hande Gulcan, Aylin Tarcan
BACKGROUND: Anemia is a common problem in premature infants and its most rapid and effective therapy is erythrocyte transfusion. However, owing to inherent risks of transfusion in this population, transfusions should be administered only when adequate oxygen delivery to tissues is impaired. The aim of this study was to determine tissue acid levels using Stewart method in an attempt to evaluate the tissue oxygenation level and thereby the accuracy of transfusion timing. METHODS: This study included 47 infants delivered at gestational age below 34 weeks who required erythrocyte transfusion for premature anemia...
February 17, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28380062/different-effects-of-fluid-loading-with-saline-gelatine-hydroxyethyl-starch-or-albumin-solutions-on-acid-base-status-in-the-critically-ill
#12
Angélique M E Spoelstra-de Man, Annemieke Smorenberg, A B Johan Groeneveld
INTRODUCTION: Fluid administration in critically ill patients may affect acid-base balance. However, the effect of the fluid type used for resuscitation on acid-base balance remains controversial. METHODS: We studied the effect of fluid resuscitation of normal saline and the colloids gelatine 4%, hydroxyethyl starch (HES) 6%, and albumin 5% on acid-base balance in 115 clinically hypovolemic critically ill patients during a 90 minute filling pressure-guided fluid challenge by a post-hoc analysis of a prospective randomized clinical trial...
2017: PloS One
https://www.readbyqxmd.com/read/28375611/phase-transition-dielectric-properties-and-ionic-transport-in-the-ch3-2nh2-pbi3-organic-inorganic-hybrid-with-2h-hexagonal-perovskite-structure
#13
A García-Fernández, J M Bermúdez-García, S Castro-García, A L Llamas-Saiz, R Artiaga, J López-Beceiro, S Hu, W Ren, A Stroppa, M Sánchez-Andújar, M A Señarís-Rodríguez
In this work, we focus on [(CH3)2NH2]PbI3, a member of the [AmineH]PbI3 series of hybrid organic-inorganic compounds, reporting a very easy mechanosynthesis route for its preparation at room temperature. We report that this [(CH3)2NH2]PbI3 compound with 2H-perovskite structure experiences a first-order transition at ≈250 K from hexagonal symmetry P63/mmc (HT phase) to monoclinic symmetry P21/c (LT phase), which involves two cooperative processes: an off-center shift of the Pb(2+) cations and an order-disorder process of the N atoms of the DMA cations...
April 4, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28368405/connexin-43-channels-are-a-pathway-for-discharging-lactate-from-glycolytic-pancreatic-ductal-adenocarcinoma-cells
#14
T H Dovmark, M Saccomano, A Hulikova, F Alves, P Swietach
Glycolytic cancer cells produce large quantities of lactate that must be removed to sustain metabolism in the absence of oxidative phosphorylation. The only venting mechanism described to do this at an adequate rate is H(+)-coupled lactate efflux on monocarboxylate transporters (MCTs). Outward MCT activity is, however, thermodynamically inhibited by extracellular acidity, a hallmark of solid tumours. This inhibition would feedback unfavourably on metabolism and growth, raising the possibility that other venting mechanisms become important in under-perfused tumours...
April 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28357418/distribution-of-dopant-ions-around-poly-3-4-ethylenedioxythiophene-chains-a-theoretical-study
#15
Jordi Casanovas, David Zanuy, Carlos Alemán
The effect of counterions and multiple polymer chains on the properties and structure of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with ClO4(-) has been examined using density functional theory (DFT) calculations with periodic boundary conditions (PBCs). Calculations on a one-dimensional periodic model with four explicit polymer repeat units and two ClO4(-) molecules indicate that the latter are separated as much as possible, with the salt structure and band gap obtained from such ClO4(-) distribution being in excellent agreement with those determined experimentally...
April 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28345066/correlation-of-central-venous-pressure-with-venous-blood-gas-analysis-parameters-a-diagnostic-study
#16
Sima Rahim-Taleghani, Alireza Fatemi, Mostafa Alavi Moghaddam, Majid Shojaee, Abdelrahman Ibrahim Abushouk, Mohammad Mehdi Forouzanfar, Alireza Baratloo
OBJECTIVE: This study was conducted to assess the correlation between central venous pressure (CVP) and venous blood gas (VBG) analysis parameters, to facilitate management of severe sepsis and septic shock in emergency department. MATERIAL AND METHODS: This diagnostic study was conducted from January 2014 until June 2015 in three major educational medical centers, Tehran, Iran. For patients selected with diagnosis of septic shock, peripheral blood sample was taken for testing the VBG parameters and the anion gap (AG) was calculated...
March 2017: Turkish Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28336848/effects-of-iodine-doping-on-optoelectronic-and-chemical-properties-of-polyterpenol-thin-films
#17
Kateryna Bazaka, Mohan V Jacob
Owing to their amorphous, highly cross-liked nature, most plasma polymers display dielectric properties. This study investigates iodine doping as the means to tune optoelectronic properties of plasma polymer derived from a low-cost, renewable resource, i.e., Melaleuca alternifolia oil. In situ exposure of polyterpenol to vapors of electron-accepting dopant reduced the optical band gap to 1.5 eV and increased the conductivity from 5.05 × 10(-8) S/cm to 1.20 × 10(-6) S/cm. The increased conductivity may, in part, be attributed to the formation of charge-transfer complexes between the polymer chain and halogen, which act as a cation and anion, respectively...
January 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28328963/chloride-alterations-in-hospitalized-patients-prevalence-and-outcome-significance
#18
Charat Thongprayoon, Wisit Cheungpasitporn, Zhen Cheng, Qi Qian
Serum Cl (sCl) alterations in hospitalized patients have not been comprehensively studied in recent years. The aim of this study is to investigate the prevalence and outcome significance of (1) sCl alterations on hospital admission, and (2) sCl evolution within the first 48 hr of hospital admission. We conducted a retrospective study of all hospital admissions in the years 2011-2013 at Mayo Clinic Rochester, a 2000-bed tertiary medical center. Outcome measures included hospital mortality, length of hospital stay and discharge disposition...
2017: PloS One
https://www.readbyqxmd.com/read/28322687/correction-altered-mental-status-and-an-acid-base-disturbance
#19
Shylaja Mani, Gregory W Rutecki
In the article "A patient with altered mental status and an acid-base disturbance" (Mani S, Rutecki GW, Cleve Clin J Med 2017; 84:27-34), 2 errors occurred in Table 2. The corrected table appears with corrections shown in red. In addition, two sentences in the text regarding the osmol gap should be revised as follows: On page 31, the last 3 lines should read as follows: "When the anion gap metabolic acidosis is multifactorial, as it was suspected to be in a case reported by Tan et al,(23) the osmol gap may be elevated as a consequence of additional toxic ingestions, as it was in the reported patient...
March 2017: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/28315119/alterations-of-mg-2-after-hemorrhagic-shock
#20
Mun-Young Lee, Dong Kwon Yang, Shang-Jin Kim
Hemorrhagic shock is generally characterized by hemodynamic instability with cellular hypoxia and diminishing cellular function, resulting from an imbalance between systemic oxygen delivery and consumption and redistribution of fluid and electrolytes. Magnesium (Mg) is the fourth most abundant cation overall and second most abundant intracellular cation in the body and an essential cofactor for the energy production and cellular metabolism. Data for blood total Mg (tMg; free-ionized, protein-bound, and anion-bound forms) and free Mg(2+) levels after a traumatic injury are inconsistent and only limited information is available on hemorrhagic effects on free Mg(2+) as the physiologically active form...
March 17, 2017: Biological Trace Element Research
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