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https://www.readbyqxmd.com/read/29458038/diagnosing-distensible-venous-malformations-of-the-orbit-with-diffusion-weighted-magnetic-resonance-imaging
#1
Evan Kalin-Hajdu, John B Colby, Oluwatobi Idowu, F Lawson Grumbine, Jessica M Kang, Kristin S Hirabayashi, Christine M Glastonbury, M Reza Vagefi, Robert C Kersten
PURPOSE: To compare the diffusion-weighted imaging characteristics of non-thrombosed distensible venous malformations of the orbit with that of other histologically-proven orbital tumors. DESIGN: Retrospective case-control study. METHODS: Patients with non-thrombosed distensible venous malformations of the orbit and patients with other histologically-proven orbital tumors were selected for chart review. The main outcome measure was the apparent diffusion coefficient of these lesions...
February 16, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29457905/computational-investigation-on-the-influence-of-halogen-atoms-on-the-photophysical-properties-of-tetraphenylporphyrin-and-its-zinc-ii-complexes
#2
Bruna Clara De Simone, Gloria Mazzone, Nino Russo, Emilia Sicilia, Marirosa Toscano
How the tetraphenylporphyrin (TPP) and its zinc (II) complex (ZnTPP) photophysical properties (adsorption energies, singlet-triplet energy gap and spin orbit coupling contributions) can change due to the presence of an increasing number of heavy atoms in their molecular structures has been investigated by means of density functional theory and its time dependent formulation. Results show as the increase of the atomic mass of the substituted halogen strongly enhances the spin-orbit coupling values allowing a more efficient singlet-triplet intersystem crossing...
February 19, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29457895/periodic-trends-in-actinyl-thio-crown-ether-complexes
#3
Shu-Xian Hu, Jing-Jing Liu, John K Gibson, Jun Li
In-cavity complexes and their bonding features between thio-crown (TC) ethers and f-elements are unexplored so far. In this paper, actinyl(VI) (An = U, Np, Pu, Am, and Cm) complexes of TC ethers have been characterized using relativistic density functional theory. The TC ether ligands include tetrathio-12-crown-4 (12TC4), pentathio-15-crown-5 (15TC5), and hexathio-18-crown-6 (18TC6). On the basis of the calculations, it is found that the "double-decker" sandwich structure of AnO2 (12TC4)2 2+ and "side-on" structure AnO2 (12TC4)2+ are changed to "insertion" structures for AnO2 (15TC5)2+ and AnO2 (18TC6)2+ due to increased size of the TC ether ligands...
February 19, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29456943/transnasal-endoscopic-optic-nerve-decompression-in-post-traumatic-optic-neuropathy
#4
Devang Gupta, Monica Gadodia
To quantify the successful outcome in patients following optic nerve decompression in post traumatic unilateral optic neuropathy in form of improvement in visual acuity. A prospective study was carried out over a period of 5 years (January 2011 to June 2016) at civil hospital Ahmedabad. Total 20 patients were selected with optic neuropathy including patients with direct and indirect trauma to unilateral optic nerve, not responding to conservative management, leading to optic neuropathy and subsequent impairment in vision and blindness...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456852/xanthogranulomatous-pituitary-adenoma-a-case-report-and-literature-review
#5
Guihong Li, Chaochao Zhang, Yuxue Sun, Qingchun Mu, Haiyan Huang
Xanthogranuloma, also referred to as cholesterol granuloma or xanthogranulomatous reaction, is a granulomatous lesion that is infrequently found in the sellar and parasellar regions. Xanthogranulomatous pituitary adenoma is relatively rare and, thus, the etiology, diagnosis, management and prognosis of this condition remain incompletely understood. We herein report the case of a 56-year-old female patient who presented to our institution with intermittent headache, vomiting and distending pain in the bilateral orbital regions...
March 2018: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29456257/irc-10-216-in-3-d-morphology-of-a-tp-agb-star-envelope
#6
M Guélin, N A Patel, M Bremer, J Cernicharo, A Castro-Carrizo, J Pety, J P Fonfría, M Agúndez, M Santander-García, G Quintana-Lacaci, L Velilla Prieto, R Blundell, P Thaddeus
During their late pulsating phase, AGB stars expel most of their mass in the form of massive dusty envelopes, an event that largely controls the composition of interstellar matter. The envelopes, however, are distant and opaque to visible and NIR radiation: their structure remains poorly known and the mass-loss process poorly understood. Millimeter-wave interferometry, which combines the advantages of longer wavelength, high angular resolution and very high spectral resolution is the optimal investigative tool for this purpose...
February 2018: Astronomy and Astrophysics
https://www.readbyqxmd.com/read/29454531/orbital-atherectomy-for-the-treatment-of-small-2-5mm-severely-calcified-coronary-lesions-orbit-ii-sub-analysis
#7
Michael S Lee, Richard A Shlofmitz, Evan Shlofmitz, Pratyaksh K Srivastava, Jeremy Kong, Cindy Grines, George Revytak, Jeffrey W Chambers
OBJECTIVES: We assessed the safety and efficacy of orbital atherectomy to modify severely calcified coronary plaque prior to stent implantation in patients with small vessel (2.5mm) disease. BACKGROUND: Severe coronary artery calcification increases the risk of adverse clinical events during percutaneous coronary intervention (PCI). Patients who undergo PCI of small vessels have worse clinical outcomes including higher rates of perforation and dissection. The outcomes of orbital atherectomy of small diameter vessels (2...
October 3, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29454253/charge-transfer-complex-between-2-3-diaminopyridine-with-chloranilic-acid-synthesis-characterization-and-dft-td-dft-computational-studies
#8
Khairia M Al-Ahmary, Moustafa M Habeeb, Areej H Al-Obidan
New charge transfer complex (CTC) between the electron donor 2,3-diaminopyridine (DAP) with the electron acceptor chloranilic (CLA) acid has been synthesized and characterized experimentally and theoretically using a variety of physicochemical techniques. The experimental work included the use of elemental analysis, UV-vis, IR and 1 H NMR studies to characterize the complex. Electronic spectra have been carried out in different hydrogen bonded solvents, methanol (MeOH), acetonitrile (AN) and 1:1 mixture from AN-MeOH...
February 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29453475/basal-cell-carcinoma-in-cases-with-or-without-xeroderma-pigmentosum
#9
Dilasma Ghartimagar, Arnab Ghosh, Sushil Ram Shrestha, Sachet Shrestha, Sushma Thapa, Raghavan Narasimhan, O P Talwar
INTRODUCTION: Basal cell carcinoma is the most common form of cancer in humans and comprises the vast majority of skin cancers. It predominantly affects fair-skinned individuals, and its incidence is rapidly increasing. The objective of the study is to identify the epidemiology, its topography and different histological subtypes of basal cell carcinoma in patients with or without Xeroderma Pigmentosum. METHODS: A cross-sectional descriptive study was conducted at Manipal Teaching Hospital, Pokhara from Jan 2009 to Dec 2016...
October 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/29453305/frequency-and-outcomes-of-reduced-dose-non-vitamin-k-antagonist-anticoagulants-results-from-orbit-af-ii-the-outcomes-registry-for-better-informed-treatment-of-atrial-fibrillation-ii
#10
Benjamin A Steinberg, Peter Shrader, Karen Pieper, Laine Thomas, Larry A Allen, Jack Ansell, Paul S Chan, Michael D Ezekowitz, Gregg C Fonarow, James V Freeman, Bernard J Gersh, Peter R Kowey, Kenneth W Mahaffey, Gerald V Naccarelli, James A Reiffel, Daniel E Singer, Eric D Peterson, Jonathan P Piccini
BACKGROUND: Non-vitamin K antagonist oral anticoagulants (NOACs) are indicated for stroke prevention in atrial fibrillation (AF) but require lower doses in certain patients. We sought to describe the frequency, appropriateness (according to Food and Drug Administration labeling), and outcomes of patients prescribed reduced doses of NOACs in community practice. METHODS AND RESULTS: We analyzed data from the ORBIT-AF II (The Outcomes Registry for Better Informed Treatment of Atrial Fibrillation II) registry, a prospective, national, observational registry of AF patients...
February 16, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29453209/recurrent-epistaxis-leading-to-diagnosis-of-primary-sinonasal-melanoma
#11
Karine Tawagi, Rita Akaraz-Avedissian, Irina Burman-Solovyeva
A 48-year-old man presented to urgent care with recurrent epistaxis over 6 months. Initially, nosebleeds were controlled with packing or cautery. Ultimately, he was referred to ear, nose and throat department and underwent nasal endoscopy which revealed polypoid tissue. A biopsy of the polyp showed non-specific inflammation with no evidence of malignancy. Follow-up maxillofacial CT revealed a large mass lesion in the right maxillary sinus, right nasal fossa, much of the ethmoids and right sphenoid, with destruction of adjacent bony structures...
February 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29453141/dft-td-dft-calculations-spectroscopic-characterizations-ftir-nmr-uv-vis-molecular-docking-and-enzyme-inhibition-study-of-7-benzoyloxycoumarin
#12
Mahboob Alam, Mohammad Jane Alam, Shaista Azaz, Mehtab Parveen, Soonheum Park, Shabbir Ahmad
The quantum chemical study, spectroscopic characterization and biological activity of the pharmaceutically active 7-benzoyloxycoumarin (2) molecule have been presented. Potential energy surface (PES) scanning has been performed to search for the most stable molecular geometry of the present compound. The stable geometry in the ground state, IR, UV-Vis absorption and NMR ( 13 C, 1 H) spectra of the title compound were theoretically obtained and compared with the experimental one. Various theoretical molecular parameters like molecular energy, atomic charges, dipole moment, thermodynamic parameters, donor-acceptor natural bond orbital (NBO) hyperconjugative interaction energies, frontier molecular orbitals energies, HOMO-LUMO gap, molecular electrostatic potential, chemical reactivity descriptors, molecular polarizability and non-linear optical (NLO) properties are presented...
February 8, 2018: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29453018/-management-of-rhinosinusitis-in-primary-care
#13
N Gómez Gabaldón, C Manzanares Arnaiz, L Noguero Cánovas, J Juan Armas
Acute rhinosinusitis is an important health problem. Even though its frequency is not well documented in our country?, the economic burden it bears is not insignificant as it notably alters the quality of life of affected patients. Its diagnosis is generally clinical in nature, with further studies reserved only for the differential diagnoses of complications or tumour-like processes. The most frequent causes are viral infections, although Streptococcus pneumoniae and Haemophilus influenzae are the most commonly isolated bacterial agents...
February 13, 2018: Semergen
https://www.readbyqxmd.com/read/29452841/impact-of-age-following-treatment-of-severely-calcified-coronary-lesions-with-the-orbital-atherectomy-system-3-year-follow-up
#14
Michael S Lee, Richard A Shlofmitz, Brad J Martinsen, Sanjum Sethi, Jeffrey W Chambers
OBJECTIVES: We investigated the safety and efficacy of coronary orbital atherectomy to treat severely calcified lesions prior to stenting based upon age. BACKGROUND: The ORBIT II study reported the safety and efficacy with orbital atherectomy in 443 patients with severely calcified lesions. Elderly patients undergoing percutaneous coronary intervention may be at increased risk for major adverse cardiac events (MACE) and death compared with younger patients. METHODS: Patients were stratified according to age (≥75 year old [174/443, 39...
January 31, 2018: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29452688/comparison-of-the-efficacy-and-safety-of-orbital-and-rotational-atherectomy-in-calcified-narrowings-in-patients-who-underwent-percutaneous-coronary-intervention
#15
Edward Koifman, Hector M Garcia-Garcia, Kayode O Kuku, Alexandre H Kajita, Kyle D Buchanan, Arie Steinvil, Toby Rogers, Nelson L Bernardo, Robert Lager, Robert A Gallino, Itsik Ben-Dor, Augusto D Pichard, Rebecca Torguson, Jiaxiang Gai, Lowell F Satler, Ron Waksman
We aimed to compare the safety and efficacy of rotational atherectomy (RA) and orbital atherectomy (OA) during percutaneous coronary intervention in an all-comer population with severely calcified lesions. We included all patients who underwent percutaneous coronary intervention with OA or RA in our institution from October 2013 until October 2016. Comparison of baseline and procedural characteristics, along with acute complication rates and postprocedural cardiac enzyme elevation, was performed. There were 191 RA and 57 OA patients...
February 13, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29452317/the-minimally-invasive-alternative-approaches-to-the-pterional-craniotomy-a-systematic-review-of-the-literature
#16
REVIEW
Jonathan Rychen, Davide Croci, Michel Roethlisberger, Erez Nossek, Matthew Potts, Ivan Radovanovic, Howard Riina, Luigi Mariani, Raphael Guzman, Daniel W Zumofen
OBJECTIVE: Minimally invasive alternatives to the pterional craniotomy include the minipterional and the supraorbital craniotomy (SOC). The latter is performed via either an eyebrow or an eyelid skin incision. The purpose of this systematic review was to analyze the type and the incidence of approach-related complications of these keyhole craniotomies. METHODS: We review pertinent publications retrieved by search in the PubMed/Medline database. Inclusion criteria were all full-text publications, abstracts, and posters in English, up to 2016, reporting clinical results...
February 13, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29452298/treatment-and-outcomes-in-patients-with-igg4-related-disease-using-the-igg4-responder-index
#17
Andreu Fernández-Codina, Blanca Pinilla, Iago Pinal-Fernández, Cristina López, Guadalupe Fraile-Rodríguez, Eva Fonseca-Aizpuru, Iago Carballo, Pilar Brito-Zerón, Carlos Feijóo-Massó, Miguel López-Dupla, Maria Cinta Cid, Fernando Martínez-Valle
BACKGROUND: IgG4-related disease (IgG4-RD) is an autoimmune disease triggering an inflammatory cascade that leads to fibrosis. Outcome measures are limited and treatment options remain underexplored. OBJECTIVES: To assess the variation of the IgG4 responder index (IgG4-RI) in a cohort of IgG4-RD patients and to explore their treatments and outcomes. METHODS: We studied the clinical phenotype, severity of the disease and response to treatment in an ambispective multicenter cohort study including 14 different hospitals in Spain...
February 13, 2018: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29451793/temporary-anion-states-of-ethene-interacting-with-single-molecules-of-methane-ethane-and-water
#18
Thomas Sommerfeld, Joshua B Melugin, Masahiro Ehara
When an excess electron is added into the π* orbital of ethene, the resulting anion decays by electron autodetachment---that is, it represents an electronic state referred to as a temporary anion or resonance state. Here the influence of a cluster environment on the energy and lifetime of this state is investigated. The clusters considered are ethene...CH 4 , ethene...C 2 H 6 , and ethene...H 2 O. Most of these clusters are systematically constructed so that the solvent interacts with the π system in a specific way, and are thus by construction not minima with respect to all intermolecular degrees of freedom...
February 16, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29451787/effect-of-methyl-substitution-on-the-n-h%C3%A2-%C3%A2-%C3%A2-o-interaction-in-complexes-of-pyrrole-with-water-methanol-and-dimethyl-ether-matrix-isolation-infrared-spectroscopy-and-ab-initio-computational-studies
#19
Shubhra Sarkar, Nagarajan Ramanathan, Kalyanasundaram Sundararajan
Hydrogen bonded interactions of pyrrole with water and methanol have been studied using matrix isolation infrared spectroscopy and compared with the calculation performed on dimethyl ether. Computations carried out at MP2/aug-cc-pVDZ level of theory yielded two minima for the pyrrole-water and pyrrole-methanol complexes. The global and local minima correspond to the N-H∙∙∙O and O-H∙∙∙π complexes, respectively, where the N-H group of pyrrole interacts with oxygen of water/methanol and O-H of water and methanol interacts with the π cloud of pyrrole...
February 16, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29451580/covalent-organic-nanosheets-for-effective-charge-transport-layers-in-planar-type-perovskite-solar-cells
#20
Soyun Park, Min-Sung Kim, Woongsik Jang, Jin Kuen Park, Dong Hwan Wang
Herein, solvent-treated bandgap-tunable covalent organic nanosheets (CONs) were prepared via the Stille cross-coupling reaction. These materials are considered useful as interlayers in photovoltaic devices upon the alignment of energy levels between other components. Among various types of solar cells, according to the organic-interlayer study, inverted planar perovskite solar cells (PSCs) are mostly demanded to effectively transport and collect charge carriers due to their high performance. At first, the C-V analysis proved the energy levels of the frontier orbitals for CON-10 and CON-16 nanosheets; this verified the suitability of these nanosheets as hole transport layers (HTLs) with the PEDOT:PSS upon casting both films from DMSO...
February 16, 2018: Nanoscale
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