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https://www.readbyqxmd.com/read/28540053/euglycaemic-ketoacidosis-in-a-non-diabetic-primigravida-following-an-appendicectomy
#1
Dinushi Dilanka Dikowita, Thirunavukarasu Kumanan, Kopalasuntharam Muhunthan, Janaki Arulmoli
Pregnancy creates significant alterations in energy metabolism which itself is a physiological adaptation to provide continuous flow of energy metabolites to the foetus. The state of insulin resistance created by hormonal changes in pregnancy enables free flow of glucose to the foetus and allows its absorption through facilitated diffusion. As glucose is preferentially available for the foetus, maternal fasting glucose level would be less than that of a non-pregnant state and in contrast plasma ketones and free fatty acids levels are elevated, resulting in a state of accelerated starvation...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28534913/theoretical-investigation-of-energy-gap-bowing-in-cdsxse1-x-alloy-quantum-dots
#2
Laxman Tatikondewar, Anjali Kshirsagar
To investigate energy gap bowing in homogeneously alloyed CdSxSe1-x quantum dots (QDs) and to understand whether it is different from bulk, we perform density functional theory based electronic structure calculations for spherical QDs of different compositions x (0 ≤ x ≤ 1) and of varying sizes (2.2 to 4.6 nm). We find the bowing constant to be slightly higher than in bulk for different sizes of quantum dots. The change in the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap of QDs mainly arises due to the change in the LUMO energies...
May 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28531309/effect-of-antiretroviral-therapy-on-bone-and-renal-health-in-young-adults-infected-with-hiv-in-early-life
#3
Aylin B Unsal, Aviva S Mattingly, Sara E Jones, Julia B Purdy, James C Reynolds, Jeffrey B Kopp, Rohan Hazra, Colleen M Hadigan
Context: HIV antiretroviral (ARV) therapy is associated with renal and bone toxicity, but little is known about the potential cumulative effects in adults exposed to ARVs from birth. Objective: To prospectively evaluate renal and bone health in young adults with lifelong HIV and extensive ARV exposure. Design: Cross-sectional comparison of bone mineral density (BMD by dual-energy X-ray absorptiometry), bone turnover and renal function in young adults infected with HIV in early life (n=65) to matched healthy controls (n=23) and longitudinal evaluation (mean follow-up 4...
May 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28527467/gas-phase-anion-photoelectron-spectroscopy-and-theoretical-investigation-of-gold-acetylide-species
#4
Peng Wang, Wenjing Zhang, Xi-Ling Xu, Jinyun Yuan, Hong-Guang Xu, Weijun Zheng
We conducted gas phase anion photoelectron spectroscopy and density functional theory studies on a number of gold acetylide species, such as AuC2H, AuC2Au, and Au2C2H. Based on the photoelectron spectra, the electron affinities of AuC2H, AuC2Au, and Au2C2H are measured to be 1.54(±0.04), 1.60(±0.08), and 4.23(±0.08) eV, respectively. The highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gaps of AuC2H and AuC2Au are measured to be about 2.62 and 2.48 eV, respectively. It is interesting that photoelectron spectra of AuC2H(-) and AuC2Au(-) display similar spectral features...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28524033/-procedural-analysis-of-acid-base-balance-disorder-case-serials-in-4-patents
#5
Chunyuan Ma, Guijie Wang
OBJECTIVE: To establish the standardization process of acid-base balance analysis, analyze cases of acid-base balance disorder with the aid of acid-base balance coordinate graph. METHODS: The acid-base balance theory were reviewed systematically on recent research progress, and the important concepts, definitions, formulas, parameters, regularity and inference in the analysis of acid-base balance were studied. The analysis of acid-base balance disordered processes and steps were figured...
May 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28513658/capillary-zone-electrophoresis-mass-spectrometry-with-microliter-scale-loading-capacity-140-min-separation-window-and-high-peak-capacity-for-bottom-up-proteomics
#6
Daoyang Chen, Xiaojing Shen, Liangliang Sun
Better peptide separation is required for bottom-up proteomics for further improving the proteome coverage. The two-dimensional liquid chromatography (2D-LC) systems only explore differences among peptides in their hydrophobicity (reversed-phase, RP) and charge (strong cation/anion exchange, SCX/SAX). Alternative separation techniques with different separation mechanisms are required to further improve the separation. Capillary zone electrophoresis (CZE) is an attractive alternative because it has high efficiency for separation of biomolecules and it separates analytes based on their size-to-charge ratios, complementary with LC...
May 17, 2017: Analyst
https://www.readbyqxmd.com/read/28513171/ni-ii-complexes-of-the-redox-active-bis-2-aminophenyl-dipyrrin-structural-spectroscopic-and-theoretical-characterization-of-three-members-of-an-electron-transfer-series
#7
Jules Moutet, Christian Philouze, Amaury du Moulinet d'Hardemare, Nicolas Leconte, Fabrice Thomas
The sterically hindered bis(2-aminophenyl)dipyrrin ligand H3(N)L was prepared. X-ray diffraction discloses a bifurcated hydrogen bonding network involving the dipyrrin and one aniline ring. The reaction of H3(N)L with one equivalent of nickel(II) in the air produces a paramagnetic neutral complex, which absorbs intensively in the Vis-NIR region. Its electron paramagnetic resonance spectrum displays resonances at g1 = 2.033, g2 = 2.008, and g3 = 1.962 that are reminiscent of an (S = 1/2) system having a predominant organic radical character...
May 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28512770/role-of-halide-ions-on-the-nature-of-magnetic-anisotropy-in-tetrahedral-co-ii-complexes
#8
Maheswaran Shanmugam, Shefali Vaidya, Saurabh Kumar Singh, Pragya Shukla, Kamaluddin Ansari, Gopalan Rajaraman
A family tetrahedral Co(II) complexes with molecular formula of [CoL2X2] (where L= thiourea and X = Cl (1), Br (2) and I (3)) were isolated. Detailed dc susceptibility (χMT(T) and M(H)) and its slow relaxation of magnetization measurements were performed on all the three complexes. The experimental dc magnetic data is excellently reproduced by fitting both χMT(T) and M(H) simultaneously using the parameters D = +10.8 cm-1, g1 = 2.2, g2 = 2.2, and g3 = 2.4 for 1; D = -18.7 cm-1, giso = 2.21 for 2; D = -19...
May 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28511010/%C3%AF-extended-and-curved-anti-aromatic-polycyclic-hydrocarbons
#9
Junzhi Liu, Ji Ma, Ke Zhang, Prince Ravat, Peter Machata, Stanislav M Avdoshenko, Felix Hennersdorf, Hartmut Komber, Wojciech Pisula, Jan J Weigand, Alexey A Popov, Reinhard Berger, Klaus Müllen, Xinliang Feng
Synthesis of anti-aromatic polycyclic hydrocarbons (PHs) is challenging because the high energy of their highest occupied molecular orbital (HOMO) and low energy of their lowest unoccupied molecular orbital (LUMO) cause them to be reactive and unstable. In this work, two large anti-aromatic acene analogues, namely cyclopenta[pqr]indeno[2,1,7-ijk]tetraphene (CIT, 1a) and cyclopenta[pqr]indeno[7,1,2-cde]picene (CIP, 1b), as well as a curved anti-aromatic molecule with 48 π-electrons, dibenzo[a,c]diindeno[7,1,2-fgh:7',1',2'-mno]phenanthro[9,10-k]tetraphene (DPT, 1c), are synthesized based on the corona of indeno[1,2-b]fluorene...
May 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28501971/electrolyte-and-acid-base-disturbances-in-end-stage-liver-disease-a-physiopathological-approach
#10
REVIEW
José Víctor Jiménez, Diego Luis Carrillo-Pérez, Rodrigo Rosado-Canto, Ignacio García-Juárez, Aldo Torre, David Kershenobich, Eduardo Carrillo-Maravilla
Electrolyte and acid-base disturbances are frequent in patients with end-stage liver disease; the underlying physiopathological mechanisms are often complex and represent a diagnostic and therapeutic challenge to the physician. Usually, these disorders do not develop in compensated cirrhotic patients, but with the onset of the classic complications of cirrhosis such as ascites, renal failure, spontaneous bacterial peritonitis and variceal bleeding, multiple electrolyte, and acid-base disturbances emerge. Hyponatremia parallels ascites formation and is a well-known trigger of hepatic encephalopathy; its management in this particular population poses a risky challenge due to the high susceptibility of cirrhotic patients to osmotic demyelination...
May 13, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28497504/semiconducting-coordination-polymers-based-on-the-pre-designed-ternary-te-fe-cu-carbonyl-cluster-and-conjugation-interrupted-dipyridyl-linkers
#11
Minghuey Shieh, Chia-Chi Yu, Chia-Yeh Miu, Chang-Hung Kung, Chung-Yi Huang, Yu-Hsin Liu, Hsiang-Lin Liu, Chih-Chiang Shen
A series of semiconducting cluster-incorporated Cu-based coordination polymers, namely, 1D zigzag polymers [[{TeFe3(CO)9Cu2}(L)]n (L = 1,2-bis(4-pyridyl)ethane (bpea), 1; L = 1,2-bis(4-pyridyl)ethylene (bpee), 5), 2D honeycomb-like polymers [{TeFe3(CO)9Cu}Cu(L)2.5]n (L = bpea, 2; L =bpee, 6), and 2D wave-like cation-anion polymer [{Cu2(L)4}{{TeFe3(CO)9Cu}2(L)}]n (L = 1,3-bis(4-pyridyl)propane (bpp), 4), as well as the macrocycle [{TeFe3(CO)9Cu2}2(bpp)2] (3) have been quantitatively synthesized via the liquid-assisted grinding from the pre-designed cluster [TeFe3(CO)9Cu2(MeCN)2] with conjugated or conjugation-interrupted dipyridyl linkers...
May 11, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28492320/hydrazine-assisted-syntheses-and-properties-of-mercury-tellurides-containing-transition-metal-complexes
#12
Peipei Sun, Shuzhen Liu, Shufen Li, Limei Zhang, Hui Sun, Dingxian Jia
With assistance of reactive and coordinative hydrazine, transition-metal telluromercurates [Mn(trien)(N2H4)2]2[Hg2Te4]2 (A), [Zn(trien)(N2H4)2]Hg2Te4 (B), [Mn(tepa)(N2H4)]2Hg4Te12 (C), [TM(trien)(Hg2Te4)] (TM = Mn (D), Zn (E)), and [Zn(atep)]2Hg5Te12 (atep = 4-(2-aminoethyl)triethylenetetramine) (F) were solvothermally prepared in triethylenetetramine (trien) or tetraethylenepentamine (tepa) solvents using elemental Te as precursor in lower temperature range. Compounds A and B consist of mixed coordination cations [TM(trien)(N2H4)2](2+) (TM = Mn, Zn) and one-dimensional polyanion [Hg2Te4](2-) with the five-membered Hg2Te3 rings being coplanar...
May 11, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28488705/ni-co-ti-layered-double-hydroxide-for-highly-efficient-photocatalytic-degradation-of-rhodamine-b-and-acid-red-g-a-comparative-study
#13
Priyadarshi Roy Chowdhury, Krishna G Bhattacharyya
Optically responsive, luminescent Ni/Co/Ti layered double hydroxide (LDH), synthesized by a single step hydrothermal route, exhibits highly efficient photodegradation of cationic and anionic dyes, Rhodamine B (∼99.8%) and Acid Red G (∼99.6%) respectively, better than that of commercial catalysts like NiO, CoO and TiO2. The LDH has been characterized by using XRD, XPS, PL, TRES, EIS, TEM, SEM-EDX, AFM, UV-visible DRS, N2-sorption desorption, ξ-potential, FT-IR and TG techniques. The characterized results indicate that the LDH possesses hexagonal morphology, a high surface area, a narrow band gap, defect states and oxygen vacancies within its layered framework...
May 10, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28475840/electronic-excited-state-lifetimes-of-anionic-water-clusters-dependence-on-charge-solvation-motif
#14
Daniel Borgis, Peter J Rossky, László Turi
An ongoing controversy about water cluster anions concerns the electron-binding motif, whether the charge center is localized at the surface or within the cluster interior. Here, mixed quantum-classical dynamics simulations have been carried out for a wide range of cluster sizes (n ≤ 1000) for (H2O)n(-) and (D2O)n(-), based on a nonequilibrium first-order rate constant approach. The computed data are in good general agreement with time-resolved photoelectron imaging results (n ≤ 200). The analysis reveals that, for surface state electrons, the cluster size dependence of the excited state electronic energy gap and the magnitude of the nonadiabatic couplings have compensating influences on the excited state lifetimes: the excited state lifetime for surface states reaches a minimum for n ∼ 150 and then increases for larger clusters...
May 10, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28469150/serum-anion-gap-at-admission-as-a-predictor-of-mortality-in-the-pediatric-intensive-care-unit
#15
Min Jung Kim, Yoon Hee Kim, In Suk Sol, Soo Yeon Kim, Jong Deok Kim, Ha Yan Kim, Kyung Won Kim, Myung Hyun Sohn, Kyu-Earn Kim
An accurate method to predict the mortality in the intensive care unit (ICU) patients has been required, especially in children. The aim of this study is to evaluate the value of serum anion gap (AG) for predicting mortality in pediatric ICU (PICU). We reviewed a data of 461 pediatric patients were collected on PICU admission. Corrected anion gap (cAG), the AG compensated for abnormal albumin levels, was significantly lower in survivors compared with nonsurvivors (p < 0.001). Multivariable logistic regression analysis identified the following variables as independent predictors of mortality; cAG (OR 1...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28468242/polymer-electrolyte-membranes-for-water-photo-electrolysis
#16
Antonino S Aricò, Mariarita Girolamo, Stefania Siracusano, David Sebastian, Vincenzo Baglio, Michael Schuster
Water-fed photo-electrolysis cells equipped with perfluorosulfonic acid (Nafion(®) 115) and quaternary ammonium-based (Fumatech(®) FAA3) ion exchange membranes as separator for hydrogen and oxygen evolution reactions were investigated. Protonic or anionic ionomer dispersions were deposited on the electrodes to extend the interface with the electrolyte. The photo-anode consisted of a large band-gap Ti-oxide semiconductor. The effect of membrane characteristics on the photo-electrochemical conversion of solar energy was investigated for photo-voltage-driven electrolysis cells...
April 29, 2017: Membranes
https://www.readbyqxmd.com/read/28465843/hypercapnea-and-acidemia-despite-hyperventilation-following-endotracheal-intubation-in-a-case-of-unknown-severe-salicylate-poisoning
#17
Shannon M Fernando, Valérie Charbonneau, Hans Rosenberg
Salicylates are common substances for deliberate self-harm. Acute salicylate toxicity is classically associated with an initial respiratory alkalosis, followed by an anion gap metabolic acidosis. The respiratory alkalosis is achieved through hyperventilation, driven by direct stimulation on the respiratory centers in the medulla and considered as a compensatory mechanism to avoid acidemia. However, in later stages of severe salicylate toxicity, patients become increasingly obtunded, with subsequent loss of airway reflexes, and therefore intubation may be necessary...
2017: Case Reports in Critical Care
https://www.readbyqxmd.com/read/28460656/gamma-hydroxybutyrate-ghb-an-unusual-cause-of-high-anion-gap-metabolic-acidosis
#18
Laurence Carlier, Vincent Van Belleghem, Kathleen Croes, Frederik Hooft, Matthias Desmet, Olivier Heylen, Stijn Lambrecht, Stefaan Carlier
The causes of high anion gap metabolic acidosis (HAGMA) are well described in the literature. However, sometimes more frequent causes of HAGMA cannot explain its occurrence. In the case of HAGMA and severe neurological depression in the absence of other causes of HAGMA, clinicians should consider an intoxication with gamma-hydroxybutyrate (GHB) as a possible cause. GHB is endogenous to the mammalian central nervous system (CNS). Synthetic GHB was initially used as an anesthetic but is now only licensed for medical use in a limited number of indications such as the treatment of narcolepsy...
May 2, 2017: CJEM
https://www.readbyqxmd.com/read/28454205/-re-disorders-of-the-acid-base-balance-and-the-anion-gap
#19
Viktor Rosival
No abstract text is available yet for this article.
May 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28451093/fabrication-of-porous-nanoflake-bimo-x-m-w-v-and-mo-photoanodes-via-hydrothermal-anion-exchange
#20
Jijie Zhang, Tuo Wang, Xiaoxia Chang, Ang Li, Jinlong Gong
Most Bi-based photoelectrodes have suitable band gaps and can effectively promote the water oxidation reaction. However, simple preparation methods for Bi-based binary metal oxides as photoanodes are scarce. This paper describes a simple hydrothermal anion exchange method to synthesize Bi-based binary metal oxides with controlled morphologies. This synthesis process uses BiOI as the template and Bi source, which is eventually converted to Bi-based porous nanoflake photoanodes upon reaction with MO x (M = W, V, and Mo)-containing precursors...
October 1, 2016: Chemical Science
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