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https://www.readbyqxmd.com/read/28649960/gold-nanoparticles-decorated-electrospun-poly-n-vinyl-2-pyrrolidone-nanofibers-with-tunable-size-and-coverage-density-for-nanomolar-detection-of-single-and-binary-component-dyes-by-surface-enhanced-raman-spectroscopy
#1
Alfin Kurniawan, Meng-Jiy Wang
The application of the electrospun nanomaterials to surface-enhanced Raman spectroscopy (SERS) is a rapidly evolving field which holds potential for future developments in the generation of portable plasmonic-based detection platforms. In this study, a simple approach to fabricate electrospun poly(N-vinylpyrrolidone) (PVP) mats decorated with gold nanoparticles (AuNPs) by combining electrospinning and calcination was presented. AuNPs were decorated on the fiber mat surface through electrostatic interactions between positively charged aminosilane groups and negatively charged AuNPs...
June 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28644474/%C3%AF-electron-s%C3%A2-%C3%A2-%C3%A2-quantum-spin-liquid-state-in-an-ionic-polyaromatic-hydrocarbon
#2
Yasuhiro Takabayashi, Melita Menelaou, Hiroyuki Tamura, Nayuta Takemori, Takashi Koretsune, Aleš Štefančič, Gyöngyi Klupp, A Johan C Buurma, Yusuke Nomura, Ryotaro Arita, Denis Arčon, Matthew J Rosseinsky, Kosmas Prassides
Molecular solids with cooperative electronic properties based purely on π electrons from carbon atoms offer a fertile ground in the search for exotic states of matter, including unconventional superconductivity and quantum magnetism. The field was ignited by reports of high-temperature superconductivity in materials obtained by the reaction of alkali metals with polyaromatic hydrocarbons, such as phenanthrene and picene, but the composition and structure of any compound in this family remained unknown. Here we isolate the binary caesium salts of phenanthrene, Cs(C14H10) and Cs2(C14H10), to show that they are multiorbital strongly correlated Mott insulators...
July 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28640087/fatal-lactic-acidosis-in-hepatitis-b-virus-associated-decompensated-cirrhosis-treated-with-tenofovir-a-case-report
#3
Tae Yang Jung, Dae Won Jun, Kang Nyeong Lee, Hang Lak Lee, Oh Young Lee, Byung Chul Yoon, Ho Soon Choi
RATIONALE: Recently tenofovir disoproxil fumarate (TDF) has been widely used as a first-line therapy for chronic hepatitis B (CHB) infection. Although TDF demonstrates successful viral suppression, the possibility of renal failure and lactic acidosis has been proposed with TDF administration, especially in human immunodeficiency virus co-infected patients. However, TDF induced lactic acidosis has never been reported in CHB mono-infected patients. PATIENT CONCERNS: A 59-year-old man received TDF for hepatitis B associated with cirrhosis...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28625257/-albumin-corrected-anion-gap-is-an-independent-risk-factor-for-long-term-mortality-of-patients-with-sepsis
#4
Xiaoli He, Xuelian Liao, Zhichao Xie, Chao Jiang, Yan Kang
OBJECTIVE: To explore whether albumin corrected anion gap (ACAG) is associated with long-term mortality of sepsis patients. METHODS: Adult patients with a diagnosis of sepsis within the first 24 hours (from December 2013 to December 2014) admitted to the intensive care unit (ICU) were included via the Sepsis database of West China Hospital Sichuan University. To record their long-term survival, patients were followed up by telephone interview one year after enrollment...
February 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28613074/blue-to-green-emitting-neutral-ir-iii-complexes-bearing-pentafluorosulfanyl-groups-a-combined-experimental-and-theoretical-study
#5
Amlan K Pal, Adam F Henwood, David B Cordes, Alexandra M Z Slawin, Ifor D W Samuel, Eli Zysman-Colman
A structure-property relationship study of neutral heteroleptic (1 and 2, [Ir(C(∧)N)2(L(∧)X)]) and homoleptic (3 and 4, fac-[Ir(C(∧)N)3]) Ir(III) complexes (where L(∧)X = anionic 2,2,6,6-tetramethylheptane-3,5-dionato-κO(3),κO(6) (thd) and C(∧)N = a cyclometalating ligand bearing a pentafluorosulfanyl (-SF5) electron-withdrawing group (EWG) at the C4 (HL1) and C3 (HL2) positions of the phenyl moiety) is presented. These complexes have been fully structurally characterized, including by single-crystal X-ray diffraction, and their electrochemical and optical properties have also been extensively studied...
June 14, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28599903/metabolic-acidosis-or-respiratory-alkalosis-evaluation-of-a-low-plasma-bicarbonate-using-the-urine-anion-gap
#6
Daniel Batlle, Jamie Chin-Theodorou, Bryan M Tucker
Hypobicarbonatemia, or a reduced bicarbonate concentration in plasma, is a finding seen in 3 acid-base disorders: metabolic acidosis, chronic respiratory alkalosis and mixed metabolic acidosis and chronic respiratory alkalosis. Hypobicarbonatemia due to chronic respiratory alkalosis is often misdiagnosed as a metabolic acidosis and mistreated with the administration of alkali therapy. Proper diagnosis of the cause of hypobicarbonatemia requires integration of the laboratory values, arterial blood gas, and clinical history...
June 6, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28597413/late-onset-ornithine-transcarbamylase-deficiency-associated-with-hyperammonemia
#7
Kana Daijo, Tomokazu Kawaoka, Takashi Nakahara, Yuko Nagaoki, Masataka Tsuge, Akira Hiramatsu, Michio Imamura, Yoshiiku Kawakami, Hiroshi Aikata, Keiichi Hara, Go Tajima, Masao Kobayashi, Kazuaki Chayama
The urea cycle converts ammonia and produces urea. One form of urea cycle abnormality is ornithine transcarbamylase (OTC) deficiency. This hereditary disorder is associated with hyperammonemia. OTC deficiency commonly appears during neonatal and early childhood life and is rare in adults. We report a 69-year-old man who presented at the local hospital with 3-day loss of appetite, early morning vomiting, and state of confusion. Blood ammonia was 293 μg/dl. At 2-3 h after admission, the patient went into a deep coma...
June 9, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28589154/prolonged-ketosis-in-a-patient-with-euglycemic-diabetic-ketoacidosis-secondary-to-dapagliflozin
#8
Shreya Pujara, Adriana Ioachimescu
Since the approval of sodium-glucose cotransporter 2 (SGLT2) inhibitors by the US Food and Drug Administration for type 2 diabetes, there have been several reports of euglycemic diabetic ketoacidosis in patients using this class of medication. We present a case of euglycemic diabetic ketoacidosis where ketonemia and glucosuria persisted well beyond the expected effect of dapagliflozin. Our patient is a 50-year-old woman with type 2 diabetes since age 35 who was taking metformin and dapagliflozin. She presented with fatigue, constipation, and 3 days of reduced oral intake...
April 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28580470/new-insights-into-the-chemistry-of-ionic-alkylorganic-carbonates-a-computational-study
#9
Khaleel I Assaf, Abdussalam K Qaroush, Ala'a F Eftaiha
A library of hydrogenated, perfluorinated aliphatic and aromatic (p-substituted) alcohols are selected together with a combination of superbases (SBs) and metal hydrides (MHs) to understand the thermodynamic parameters of the binary mixtures once serving as sorbents for the capture of CO2via ionic organic alkyl-carbonate (RCO3(-)) formation. Data are obtained using density functional theory (DFT) calculations with the B3LYP/6-31+G* level of theory and compared with the experimental results acquired from the literature using different spectroscopic techniques...
June 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28580363/targeted-metabolomics-in-colorectal-cancer-a-strategic-approach-using-standardized-laboratory-tests-of-the-blood-and-urine
#10
Katarzyna J Jerzak, Marissa Laureano, Radwa Elsharawi, Peter Kavsak, Kelvin Kw Chan, Sukhbinder K Dhesy-Thind, Kevin Zbuk
BACKGROUND: Glycolytic markers have been detected in colorectal cancer (CRC) using advanced analytical methods. METHODS: Using commercially available assays, by-products of anaerobic metabolism were prospectively measured in the blood and urine of 20 patients with metastatic colorectal cancer (mCRC) and 20 patients with local disease. Twenty-four-hour urine citrate, plasma lactate, ketones, venous blood gas, anion gap, and osmolar gap were investigated. Results of patients with metastatic and local CRC were compared using two-sample t-tests or equivalent nonparametric tests...
2017: Hypoxia
https://www.readbyqxmd.com/read/28575533/design-and-syntheses-of-a-series-of-novel-mixed-borate-and-carbonate-halides
#11
Lili Liu, Yun Yang, Junben Huang, Xiaoyu Dong, Zhihua Yang, Shilie Pan
Combining different functional units together has been regarded as the most ideal strategy to design and synthesize new inorganic materials. Based on numerous experiments, it is successful to assemble three kinds of anion groups together and find a series of novel mixed borate and carbonate halides, Rb9[B4O5(OH)4]3(CO3)X·7H2O (X=Cl, Br and I) and K9[B4O5(OH)4]3(CO3)X·7H2O (X=OH and I). Based on the structural template of above compounds, we also obtained NaRb6[B4O5(OH)4]3X (X=OH, I) crystals through replacing CO3 group with NaO6 octahedron, which results in the crystal structural changes from to R32...
June 2, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28569064/full-spectral-fine-tuning-visible-emissions-from-cation-hybrid-cs1-mfampbx3-x-cl-br-and-i-0-%C3%A2-m-%C3%A2-1-quantum-dots
#12
Daqin Chen, Xiao Chen, Zhongyi Wan, Gaoliang Fang
Full-color visible emissions are particularly crucial for applications in displays and lightings. In this work, we developed a facile room-temperature ligand-assisted supersaturated recrystallization synthesis of monodisperse, cubic structure Cs1-mFAmPbX3 (X = Cl, Br, and I or their mixtures Cl/Br and Br/I, 0 ≤ m ≤ 1) hybrid perovskite quantum dots (QDs). Impressively, cation substitution of Cs(+) by FA(+) was beneficial in finely tuning the band gap and in exciton recombination kinetics, improving the structural stability, and raising the absolute quantum yields up to 85%...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28553778/pulmonary-hypertension-and-right-heart-failure-due-to-severe-hypernatremic-dehydration
#13
Saurabh Chiwane, Tageldin M Ahmed, Christian P Bauerfeld, Monika Chauhan
INTRODUCTION: Neonates are at risk of developing hypernatremic dehydration and its associated complications, such as stroke, dural sinus thrombosis and renal vein thrombosis. Pulmonary hypertension has not been described as a complication of hypernatremia. CASE REPORT: We report a case of a seven-day-old neonate with severe hypernatremic dehydration who went on to develop pulmonary hypertension and right heart failure needing extracorporeal membrane oxygenation (ECMO)...
July 2017: Perfusion
https://www.readbyqxmd.com/read/28550127/raised-anion-gap-metabolic-acidosis-in-a-4-day-old-child
#14
Roy W A Peake, Lance H Rodan
No abstract text is available yet for this article.
June 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28548520/oxysulfide-lialso-a-lithium-superionic-conductor-from-first-principles
#15
Xuelong Wang, Ruijuan Xiao, Hong Li, Liquan Chen
Through first-principles calculations and crystal structure prediction techniques, we identify a new layered oxysulfide LiAlSO in orthorhombic structure as a novel lithium superionic conductor. Two kinds of stacking sequences of layers of AlS_{2}O_{2} are found in different temperature ranges. Phonon and molecular dynamics simulations verify their dynamic stabilities, and wide band gaps up to 5.6 eV are found by electronic structure calculations. The lithium migration energy barrier simulations reveal the collective interstitial-host ion "kick-off" hopping mode with barriers lower than 50 meV as the dominating conduction mechanism for LiAlSO, indicating it to be a promising solid-state electrolyte in lithium secondary batteries with fast ionic conductivity and a wide electrochemical window...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28540053/euglycaemic-ketoacidosis-in-a-non-diabetic-primigravida-following-an-appendicectomy
#16
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
#17
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...
June 7, 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
#18
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
#19
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
#20
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
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