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https://www.readbyqxmd.com/read/29676897/crystal-structure-and-superconductivity-of-tetragonal-and-monoclinic-ce-1-x-pr-x-obis-2
#1
Akira Miura, Masanori Nagao, Yosuke Goto, Yoshikazu Mizuguchi, Tatsuma D Matsuda, Yuji Aoki, Chikako Moriyoshi, Yoshihiro Kuroiwa, Yoshihiko Takano, Satoshi Watauchi, Isao Tanaka, Nataly Carolina Rosero-Navarro, Kiyoharu Tadanaga
Ce1- x Pr x OBiS2 powders and Ce0.5 Pr0.5 OBiS2 single crystals were synthesized and their structure and superconductive properties were examined by X-ray diffraction, X-ray absorption, electronic resistivity, and magnetization. While PrOBiS2 was found to be in a monoclinic phase with one-dimensional Bi-S zigzag chains showing no superconductive transition above 0.1 K, CeOBiS2 was in a tetragonal phase with two-dimensional Bi-S planes showing zero resistivity below 1.3 K. In the range x = 0.3-0.9 in Ce1- x Pr x OBiS2 , both monoclinic and tetragonal phases were formed together with zero resistivity up to a maximum temperature of 2...
April 20, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29675938/value-of-additional-endoscopic-ultrasonography-for-surveillance-after-surgical-removal-of-intraductal-papillary-mucinous-neoplasms
#2
Ken Kamata, Mamoru Takenaka, Kosuke Minaga, Shunsuke Omoto, Takeshi Miyata, Kentaro Yamao, Hajime Imai, Atsushi Nakai, Hidekazu Tanaka, Yasutaka Chiba, Tomohiro Watanabe, Toshiharu Sakurai, Naoshi Nishida, Takaaki Chikugo, Ippei Matsumoto, Yoshifumi Takeyama, Masayuki Kitano, Masatoshi Kudo
BACKGROUND AND AIMS: This study evaluated the utility of endoscopic ultrasonography (EUS), combined with contrast-enhanced harmonic EUS (CH-EUS), for surveillance of the remnant pancreas after surgery for intraductal papillary mucinous neoplasm (IPMN). METHODS: This was a single-center, retrospective, descriptive study. A total of 134 consecutive patients who underwent surgical resection for IPMN between April 2009 and March 2015 were evaluated. The rates of recurrence and development of IPMN-concomitant pancreatic ductal adenocarcinoma (PDAC) during follow-up were assessed...
April 19, 2018: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/29666667/impact-of-the-timing-of-capsule-endoscopy-in-overt-obscure-gastrointestinal-bleeding-on-yield-and-rebleeding-rate-is-sooner-than-14-d-advisable
#3
Catarina Gomes, Rolando Pinho, Adélia Rodrigues, Ana Ponte, Joana Silva, Jaime Pereira Rodrigues, Mafalda Sousa, João Carlos Silva, João Carvalho
AIM: To evaluate the impact of the timing of capsule endoscopy (CE) in overt-obscure gastrointestinal bleeding (OGIB). METHODS: Retrospective, single-center study, including patients submitted to CE in the setting of overt-OGIB between January 2005 and August 2017. Patients were divided into 3 groups according to the timing of CE (≤ 48 h; 48 h-14 d; ≥ 14 d). The diagnostic and therapeutic yield (DY and TY), the rebleeding rate and the time to rebleed were calculated and compared between groups...
April 16, 2018: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29665641/evaluation-of-the-toxicity-of-colocasia-esculenta-aracaceae-preliminary-study-of-leaves-infected-by-phytophthora-colocasiae-on-wistar-albinos-rats
#4
Doriane Camille Nyonseu Nzebang, Marie Ide Ngaha Njila, Emma Fortune Bend, Pierre Claver Oundoum Oundoum, Brice Landry Koloko, Calvin Bogning Zangueu, Philippe Belle Ekedi, Modeste Sameza, Dieudonné Massoma Lembè
This study was designed to investigate the acute and subacute toxicity of the aqueous extract from colocasia esculenta (CE) leaves infected by Phytophthora colocsiae (PC) in rats. Toxicity of the aqueous extract was evaluated in both male and female wistar rats after a single administration (Acute model) and during 21 days (subacute model). Acute administration of the extract up to a dose 4000 mg/kg did not induce treatment related signs of toxicity or mortality of any rat tested. Therefore, LD50 was estimated to be more than 4000 mg/kg...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29663566/mir-27a-3p-and-mir-124-3p-upregulated-in-endometrium-and-serum-from-women-affected-by-chronic-endometritis-are-new-potential-molecular-markers-of-endometrial-receptivity
#5
Cinzia Di Pietro, Salvatore Caruso, Rosalia Battaglia, Marco Iraci Sareri, Alessandro La Ferlita, Fabrizio Strino, Gabriele Bonaventura, Maurizio Di Mauro, Maria Luisa Barcellona, Vincenzo Perciavalle, Michele Purrello, Antonio Cianci
PROBLEM: Chronic endometritis (CE) is usually asymptomatic and different studies demonstrated the relation with infertility and recurrent pregnancy loss. Altered regulation of protein-encoding genes in CE has been demonstrated, but no evidence about the involvement of microRNAs in the pathology is present in literature. METHOD OF STUDY: In the endometrium from 15 women with CE and 15 healthy women, by RT-qPCR single assays, we investigated some microRNAs targeting IL11, CCL4, IGF1, and IGFBP1, which mRNAs had been found differentially expressed in endometrium of women affected by CE...
April 16, 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29662538/the-accuracy-of-intestinal-ultrasound-compared-with-small-bowel-capsule-endoscopy-in-assessment-of-suspected-crohn-s-disease-in-patients-with-negative-ileocolonoscopy
#6
Dan Carter, Lior H Katz, Eytan Bardan, Eti Salomon, Shulamit Goldstein, Shomron Ben Horin, Uri Kopylov, Rami Eliakim
Background: Small bowel involvement in Crohn's disease (CD) is frequently proximal to the ileocecal valve and inaccessible by conventional ileocolonoscopy (IC). Small bowel capsule endoscopy (SBCE) is among the prime modalities for assessment of small bowel disease in these patients. Intestinal ultrasound (IUS) is an accurate bedside fast and low-cost diagnostic modality utilized in CD for both diagnosis and monitoring. The aim of this study was to examine the accuracy of IUS in patients with suspected CD after a negative IC, and to evaluate the correlation of IUS with SBCE, inflammatory biomarkers and other cross-sectional imaging techniques...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29658710/-ag-2-m-te-2-o-5-2-so-4-m-ce-iv-or-th-iv-a-new-purely-inorganic-d-f-heterometallic-cationic-material
#7
Todd N Poe, Frankie D White, Vanessa Proust, Eric M Villa, Matthew J Polinski
Two new isotypic d/f-heterometallic purely inorganic cationic materials, [Ag2 M(Te2 O5 )2 ]SO4 (M = CeIV or ThIV ), were synthesized using the metal oxides (MO2 and TeO2 ), silver nitrate, and sulfuric acid under mild hydrothermal conditions. The prepared materials were characterized via single-crystal X-ray diffraction, which revealed that the materials possess a 3D framework of corner-sharing Te2 O5 2- units. The tellurite framework creates four unique pores, three of which are occupied by the MIV and AgI metal centers...
April 16, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29657479/minimally-invasive-mis-t%C3%A3-nnis-osteotomy-a-technical-annotation-and-review-of-short-term-results
#8
Balasubramanian Balakumar, Malek Racy, Sanjeev Madan
Aims: We detail a modified single incision approach to perform the Tonnis triple pelvic osteotomy by a minimally invasive approach. Patients and Methods: 12 children underwent minimally invasive Tonnis Osteotomy. There were five boys and seven girls in this study group. Average age was 11 years (9-15 years) at the time of surgery. Mean follow-up was 20.5 months (13-39 months). Results: The average preoperative Antero-Posterior (AP) Centre Edge (CE) angle was -8...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29657341/coordination-polymers-based-on-the-neutral-ditopic-ligand-c-6-h-4-po-och-3-2-2-involving-some-f-block-elements
#9
Kristijan Krekić, Eireen Käkel, Dieter Klintuch, Dana Bloß, Rudolf Pietschnig
An improved synthesis using microwave heating affords (C6 H4 PO(OCH3 )2 )2 in excellent isolated yield (95 %). The ligand properties of this bisphosphonateester were explored towards hard metal centers M 2+ ( M = Ca, UO2 ) and M 3+ ( M = La, Ce, Sm, Eu) resulting in coordination polymers, for which the reduction of ionic size of the central metal atom resulted in lower-dimensional structural motifs as opposed to higher dimensional networks obtained for the larger ions. All coordination polymers were characterized by single-crystal X-ray diffraction, IR spectroscopy, and combustion analysis...
February 15, 2018: Zeitschrift Für Anorganische und Allgemeine Chemie
https://www.readbyqxmd.com/read/29655424/simultaneous-elastase-hyaluronidase-and-collagenase-capillary-electrophoresis-based-assay-application-to-evaluate-the-bioactivity-of-the-red-alga-jania-rubens
#10
Syntia Fayad, Mona Tannoury, Philippe Morin, Reine Nehmé
There have been many efforts to search for affordable and efficient cosmetic ingredients from natural sources and to evaluate their bioactivities using eco-responsible tools. Hyaluronidase, elastase and collagenase are responsible for the degradation of the main components of the extracellular matrix, namely the hyaluronic acid, elastin and collagen, respectively. The aim of this work was to develop a single capillary electrophoresis method to monitor simultaneously the activities of these three enzymes, without reactant immobilization or radioactivity use...
August 22, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29643831/altered-intracortical-inhibition-in-chronic-traumatic-diffuse-axonal-injury
#11
Cintya Yukie Hayashi, Iuri Santana Neville, Priscila Aparecida Rodrigues, Ricardo Galhardoni, André Russowsky Brunoni, Ana Luiza Zaninotto, Vinicius Monteiro de Paula Guirado, Ana Sofia Cueva, Daniel Ciampi de Andrade, Manoel Jacobsen Teixeira, Wellingson Silva Paiva
Background: Overactivation of NMDA-mediated excitatory processes and excess of GABA-mediated inhibition are attributed to the acute and subacute phases, respectively, after a traumatic brain injury (TBI). However, there are few studies regarding the circuitry during the chronic phase of brain injury. Objective: To evaluate the cortical excitability (CE) during the chronic phase of TBI in victims diagnosed with diffuse axonal injury (DAI). Methods: The 22 adult subjects were evaluated after a minimum of 1 year from the onset of moderate or severe TBI...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29627786/neuro-elutax-sv-drug-eluting-balloon-versus-wingspan-stent-system-in-symptomatic-intracranial-high-grade-stenosis-a-single-center-experience
#12
Philipp Gruber, Carlos Garcia-Esperon, Jatta Berberat, Timo Kahles, Martin Hlavica, Javier Anon, Michael Diepers, Krassen Nedeltchev, Luca Remonda
BACKGROUND: Intracranial atherosclerotic disease is a well-known cause of ischemic stroke. Following the SAMMPRIS trial, medical treatment is favored over stenting. Drug-eluting balloons (DEB) are widely used in coronary angioplasty, showing better results than bare-surface balloons. There is little evidence of DEB employment in intracranial stenosis, especially of paclitaxel-eluted balloons (pDEB). The Neuro Elutax SV (Aachen Resonance) is the first CE certificated pDEB for intracranial use...
April 7, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29623127/heterogeneous-pd-catalysts-as-emulsifiers-in-pickering-emulsions-for-integrated-multistep-synthesis-in-flow-chemistry
#13
Katharina Hiebler, Georg J Lichtenegger, Manuel C Maier, Eun Sung Park, Renie Gonzales-Groom, Bernard P Binks, Heidrun Gruber-Woelfler
Within the "compartmentalised smart factory" approach of the ONE-FLOW project the implementation of different catalysts in "compartments" provided by Pickering emulsions and their application in continuous flow is targeted. We present here the development of heterogeneous Pd catalysts that are ready to be used in combination with biocatalysts for catalytic cascade synthesis of active pharmaceutical ingredients (APIs). In particular, we focus on the application of the catalytic systems for Suzuki-Miyaura cross-coupling reactions, which is the key step in the synthesis of the targeted APIs valsartan and sacubitril...
2018: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29617562/interface-effects-on-the-ionic-conductivity-of-doped-ceria-yttria-stabilized-zirconia-heterostructures
#14
Daniele Pergolesi, Elisa Gilardi, Emiliana Fabbri, Vladimir Roddatis, George Harrington, Thomas K Lippert, John A Kilner, Enrico Traversa
Multilayered heterostructures of Ce0.85 Sm0.15 O2-δ and Y0.16 Zr0.92 O2-δ of a high crystallographic quality were fabricated on (001) - oriented MgO single crystal substrates. Keeping the total thickness of the heterostructures constant, the number of ceria-zirconia bilayers was increased while reducing the thickness of each layer. At each interface Ce was found primarily in the reduced, 3+ oxidation state in a layer extending about 2 nm from the interface. Concurrently, the conductivity decreased as the thickness of the layers was reduced suggesting a progressive confinement of the charge transport along the YSZ layers...
April 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29614741/synthesis-and-fluorescence-properties-of-a-new-heterotrinuclear-co-ii-ce-iii-complex-constructed-from-a-bis-salamo-type-tetraoxime-ligand
#15
Lu-Mei Pu, Qing Zhao, Ling-Zhi Liu, Han Zhang, Hai-Tao Long, Wen-Kui Dong
[Co₂(L)Ce(OAc)₃(CH₃CH₂OH)]·1.5CH₃OH∙0.5CH₂Cl₂, a heterotrinuclear Co(II)-Ce(III) bis(salamo)-type complex with a symmetric bi(salamo)-type ligand H₄L and an acyclic naphthalenediol moiety, was designed, synthesized and characterized by elemental analyses, FT-IR, UV-Vis and fluorescence spectroscopy and X-ray crystallography. The X-ray crystallographic investigation revealed the heterotrinuclear complex consisted of two Co(II) atoms, one Ce(III) atom, one (L)4‒ unit, three μ ₂-acetate ions, one coordinated ethanol molecule, one and half crystallization methanol molecule and half crystallization dichloromethane molecule...
March 31, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29610821/the-enzyme-like-catalytic-activity-of-cerium-oxide-nanoparticles-and-its-dependency-on-ce-3-surface-area-concentration
#16
V Baldim, F Bedioui, N Mignet, I Margaill, J-F Berret
Cerium oxide nanoparticles are known to catalyze the decomposition of reactive oxygen species such as the superoxide radical and hydrogen peroxide. Herein, we examine the superoxide dismutase (SOD) and catalase (CAT) mimetic catalytic activities of nanoceria and demonstrate the existence of generic behaviors. For particles of sizes 4.5, 7.8, 23 and 28 nm, the SOD and CAT catalytic activities exhibit the characteristic shape of a Langmuir isotherm as a function of cerium concentration. The results show that the catalytic effects are enhanced for smaller particles and for the particles with the largest Ce3+ fraction...
April 3, 2018: Nanoscale
https://www.readbyqxmd.com/read/29602057/structure-and-chemistry-of-interfaces-between-ceria-and-yttria-stabilized-zirconia-studied-by-analytical-stem
#17
H Schmid, E Gilardi, G Gregori, P Longo, J Maier, P A van Aken
Epitaxial undoped and Gd2 O3 -doped ceria films were grown by pulsed laser deposition on (1 1 1) faced Y2 O3 -stabilized zirconia (YSZ). Highly localized cerium reduction at the film-substrate interfaces is revealed by atomically resolved valence EELS mapping using Cs aberration-corrected scanning transmission electron microscopy. The chemical profiles reveal interdiffusion of Ce, (Gd), Y, Zr, forming an intermixing zone at the interface 7-9 (1 1 1) lattice planes wide. In its vicinity, the fraction of Ce3+ raises gradually over 6-8 lattice planes from zero in the bulk ceria to ≈100% in one single plane at the interface...
January 31, 2018: Ultramicroscopy
https://www.readbyqxmd.com/read/29587227/characterization-of-product-related-low-molecular-weight-impurities-in-therapeutic-monoclonal-antibodies-using-hydrophilic-interaction-chromatography-coupled-with-mass-spectrometry
#18
Shunhai Wang, Anita P Liu, Yuetian Yan, Thomas J Daly, Ning Li
Traditional SDS-PAGE method and its modern equivalent CE-SDS method are both widely applied to assess the purity of therapeutic monoclonal antibody (mAb) drug products. However, structural identification of low molecular weight (LMW) impurities using those methods has been challenging and largely based on empirical knowledges. In this paper, we present that hydrophilic interaction chromatography (HILIC) coupled with mass spectrometry analysis is a novel and orthogonal method to characterize such LMW impurities present within a purified mAb drug product sample...
March 16, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29572863/enantioselective-capillary-electrophoresis-provides-insight-into-the-phase-ii-metabolism-of-ketamine-and-its-metabolites-in-vivo-and-in-vitro
#19
Friederike A Sandbaumhüter, Wolfgang Thormann
Glucuronidation catalyzed by uridine-5'-diphospho-glucuronosyl-transferases (UGTs) is the most important reaction in phase II metabolism of drugs and other compounds. O-glucuronidation is more common than N-glucuronidation. The anesthetic, analgesic and antidepressive drug ketamine is metabolized in phase I by cytochrome P450 enzymes to norketamine, hydroxynorketamine (HNK) diastereomers and dehydronorketamine (DHNK). Equine urine samples collected two hours after ketamine injection were treated with β-glucuronidase and analyzed with three enantioselective capillary electrophoresis assays...
March 23, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29561140/advancing-understanding-of-the-4-metal-extractant-thenoyltrifluoroacetonate-tta-synthesis-and-structure-of-m-iv-tta-4-m-iv-zr-hf-ce-th-u-np-pu-and-m-iii-tta-4-m-iii-ce-nd-sm-yb
#20
Samantha K Cary, Maksim Livshits, Justin N Cross, Maryline G Ferrier, Veronika Mocko, Benjamin W Stein, Stosh A Kozimor, Brian L Scott, Jeffrey J Rack
Thenoyltrifluoroacetone (HTTA)-based extractions represent popular methods for separating microscopic amounts of transuranic actinides (i.e., Np and Pu) from macroscopic actinide matrixes (e.g. bulk uranium). It is well-established that this procedure enables +4 actinides to be selectively removed from +3, + 5, and +6 f-elements. However, even highly skilled and well-trained researchers find this process complicated and (at times) unpredictable. It is difficult to improve the HTTA extraction-or find alternatives-because little is understood about why this separation works...
March 21, 2018: Inorganic Chemistry
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