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https://www.readbyqxmd.com/read/28813751/superior-ophthalmic-vein-thrombosis-the-role-of-anticoagulation
#1
Samuel Thomsen, Eric Larson, Michael Greenwood
PURPOSE: To report a case of superior ophthalmic vein thrombosis (SOVT) and review the available literature to assess if anticoagulation is warranted in all cases of SOVT. OBSERVATIONS: The patient presented to an outside hospital facility with a severe headache involving the left frontal temporal area. This progressed to left-sided ptosis and facial droop. Magnetic resonance imaging revealed a left SOVT secondary to sphenoid sinusitis. Treatment was initiated with vancomycin and cefepime, and the patient was transferred to our tertiary care center for further management...
May 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28811632/atomic-scale-study-of-the-amorphous-to-crystalline-phase-transition-mechanism-in-gete-thin-films
#2
R Mantovan, R Fallica, A Mokhles Gerami, T E Mølholt, C Wiemer, M Longo, H P Gunnlaugsson, K Johnston, H Masenda, D Naidoo, M Ncube, K Bharuth-Ram, M Fanciulli, H P Gislason, G Langouche, S Ólafsson, G Weyer
The underlying mechanism driving the structural amorphous-to-crystalline transition in Group VI chalcogenides is still a matter of debate even in the simplest GeTe system. We exploit the extreme sensitivity of (57)Fe emission Mössbauer spectroscopy, following dilute implantation of (57)Mn (T½ = 1.5 min) at ISOLDE/CERN, to study the electronic charge distribution in the immediate vicinity of the (57)Fe probe substituting Ge (FeGe), and to interrogate the local environment of FeGe over the amorphous-crystalline phase transition in GeTe thin films...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810959/a-retrospective-review-of-clinical-admissions-to-afghan-national-security-forces-health-care-institutions
#3
Christian W Ertl, David Royal, Jairo Espinosa
BACKGROUND: Few published reports have examined the numbers of civilian injuries treated at Military Treatment Facilities in the Afghan Theater of Operations. However, review of Department of Defense Trauma Registry revealed a persistent percentage of civilians treated by NATO, and this study compares the proportion of civilians served by Afghan and Coalition military hospitals between 2009 and 2013. METHODS: A retrospective review of records from Department of Defense trauma Registry for Coalition data, and Afghan data from the Office of the Inspector General...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810780/a-surprisingly-simple-correlation-between-the-classical-and-quantum-structural-networks-in-liquid-water
#4
Peter Hamm, George S Fanourgakis, Sotiris S Xantheas
Nuclear quantum effects in liquid water have profound implications for several of its macroscopic properties related to the structure, dynamics, spectroscopy, and transport. Although several of water's macroscopic properties can be reproduced by classical descriptions of the nuclei using interaction potentials effectively parameterized for a narrow range of its phase diagram, a proper account of the nuclear quantum effects is required to ensure that the underlying molecular interactions are transferable across a wide temperature range covering different regions of that diagram...
August 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28809555/electronic-magnetic-and-redox-properties-and-o2-reactivity-of-iron-ii-and-nickel-ii-o-semiquinonate-complexes-of-a-tris-thioether-ligand-uncovering-the-intradiol-cleaving-reactivity-of-an-iron-ii-o-semiquinonate-complex
#5
Peng Wang, Michelle M Killian, Mohamed R Saber, Tian Qiu, Glenn P A Yap, Codrina V Popescu, Joel Rosenthal, Kim R Dunbar, Thomas C Brunold, Charles G Riordan
The iron(II) semiquinonate character within the iron(III) catecholate species has been proposed by numerous studies to account for the O2 reactivity of intradiol catechol dioxygenases, but a well-characterized iron(II) semiquinonate species that exhibits intradiol cleaving reactivity has not yet been reported. In this study, a detailed electronic structure description of the first iron(II) o-semiquinonate complex, [PhTt(tBu)]Fe(phenSQ) [PhTt(tBu) = phenyltris(tert-butylthiomethyl)borate; phenSQ = 9,10-phenanthrenesemiquinonate; Wang et al...
August 15, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28808109/slow-induction-of-photosynthesis-on-shade-to-sun-transitions-in-wheat-may-cost-at-least-21-of-productivity
#6
Samuel H Taylor, Stephen P Long
Wheat is the second most important direct source of food calories in the world. After considerable improvement during the Green Revolution, increase in genetic yield potential appears to have stalled. Improvement of photosynthetic efficiency now appears a major opportunity in addressing the sustainable yield increases needed to meet future food demand. Effort, however, has focused on increasing efficiency under steady-state conditions. In the field, the light environment at the level of individual leaves is constantly changing...
September 26, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28805655/transfer-of-cvd-grown-graphene-for-room-temperature-gas-sensors
#7
Federica Rigoni, Rishi Maiti, Camilla Baratto, Maurizio Donarelli, Jennifer MacLeod, Bahrati Gupta, Mei Lyu, Andrea Ponzoni, Giorgio Sberveglieri, Nunzio Motta, Guido Faglia
An easy transfer procedure to obtain graphene-based gas sensing devices operating at room temperature is presented. Starting from chemical vapor deposition (CVD)-grown graphene on copper foil, we obtained single layer graphene which could be transferred onto arbitrary substrates. In particular, we placed single layer graphene on top of a SiO<sub>2</sub>/Si substrate with pre-patterned Pt electrodes to realize a chemiresistor gas sensor able to operate at room temperature. The responses to ammonia (10, 20, 30 ppm) and nitrogen dioxide (1, 2, 3 ppm) are shown at different values of relative humidity, in dark and under 254 nm UV light...
August 14, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28805386/solvation-effect-on-complexation-of-alkali-metal-cations-by-a-calix-4-arene-ketone-derivative
#8
Josip Pozar, Ivana Niksic-Franjic, Marija Cvetnic, Katarina Leko, Nikola Cindro, Katarina Piculjan, Ivana Borilovic, Leo Frkanec, Vladislav Tomisic
The medium effect on the complexation of alkali metal cations with a calix[4]arene ketone derivative (L) was systematically examined in methanol, ethanol, N-methylformamide, N,N-dimethylformamide, dimethyl sulfoxide, and acetonitrile. In all solvents the binding of Na+ cation by L was rather efficient, whereas the complexation of other alkali metal cations was observed only in methanol and acetonitrile. Complexation reactions were enthalpically controlled, while ligand dissolution was endothermic in all cases...
August 14, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28802704/early-miscarriage-rate-in-lean-polycystic-ovary-syndrome-women-after-euploid-embryo-transfer-a-matched-pair-study
#9
Lu Luo, Fang Gu, Huying Jie, Chenhui Ding, Qiang Zhao, Qiong Wang, Canquan Zhou
The early miscarriage rate is reported to be higher in patients with polycystic ovary syndrome (PCOS) compared with non-PCOS patients. However, whether PCOS is an independent risk factor for early miscarriage is still controversial; to what extent embryonic aneuploidy accounts for miscarriages of PCOS is still unknown. In this 1:3 matched-pair study, 67 lean PCOS patients and 201 controls matched for age, body mass index (BMI) and embryo scores undergoing a single euploid blastocyst transfer in vitrified-warmed cycles were analysed...
July 29, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28799732/excitation-power-modulates-energy-transfer-dynamics-in-a-supramolecular-ruii-feii-ruii-triad
#10
Joachim Kübel, Maria Wächtler, Benjamin Dietzek
Multichromophoric arrays are key to light-harvesting in natural and artificial photosynthesis. A trinuclear, symmetric RuII-FeII-RuII triad may resemble a light-harvesting model system, in which excitation energy from donor units (Ru-terpyridine-fragments) is efficiently transferred to the acceptor (an Fe-terpyridine-fragment). The photoinduced dynamics after simultaneous excitation of more than a single chromophoric unit (donor/acceptor) at varying excitation fluence is investigated in this contribution. Data suggests that energy transfer is decelerated if the acceptor states (on the FeII unit) are not depopulated fast enough...
August 11, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28796559/improvements-in-patient-and-health-system-outcomes-using-an-integrated-oncology-and-palliative-medicine-approach-on-a-solid-tumor-inpatient-service
#11
Richard F Riedel, Kim Slusser, Steve Power, Christopher A Jones, Thomas W LeBlanc, Arif H Kamal, Devi Desai, Deborah Allen, Yinxi Yu, Steven Wolf, Anthony N Galanos
PURPOSE: Early palliative care (PC) improves outcomes for outpatients with advanced cancer. Its effect on hospitalized patients with cancer is unknown. Herein, we report on the influence of a novel, fully integrated inpatient medical oncology and PC partnership at a tertiary medical center during its first year of implementation. METHODS: We conducted a retrospective, longitudinal, pre- and postintervention cohort study at Duke University Hospital. Pre- and postintervention cohorts were defined as all patients admitted to the solid tumor inpatient service from September 1, 2009, to June 30, 2010, and September 1, 2011 to June 30, 2012, respectively...
August 10, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28792768/role-of-hydrogen-bonding-in-photoinduced-electron-proton-transfer-from-phenols-to-a-polypyridine-ru-complex-with-a-proton-accepting-ligand
#12
Sergei V Lymar, Mehmed Z Ertem, Anna Lewandowska-Andralojc, Dmitry E Polyansky
Electron-proton transfer (EPT) from phenols to a triplet metal-to-ligand charge transfer (MLCT)-excited Ru polypyridine complex containing an uncoordinated nitrogen site, 1(T), can be described by a kinetic model that accounts for the H-bonding of 1(T) to phenol, 1(T) to solvent, and phenol to solvent. The latter plays a major role in the kinetic solvent effect and commonly precludes simultaneous determination of the EPT rate constant and 1(T)-phenol H-bonding constant. A number of these quantities previously reported for similar systems are shown to be in error due to inconsistent data analysis...
August 15, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28792731/catalytic-enantioselective-carbonyl-allylation-and-propargylation-via-alcohol-mediated-hydrogen-transfer-merging-the-chemistry-of-grignard-and-sabatier
#13
Seung Wook Kim, Wandi Zhang, Michael J Krische
Merging the characteristics of transfer hydrogenation and carbonyl addition, we have developed a new class of catalytic enantioselective C-C bond formations. In these processes, hydrogen transfer between alcohols and π-unsaturated reactants generates carbonyl-organometal pairs that combine to deliver products of addition. On the basis of this mechanistic paradigm, lower alcohols are converted directly to higher alcohols in the absence of premetalated reagents or discrete alcohol-to-carbonyl redox reactions...
August 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28792646/clinical-applications-of-chemical-exchange-saturation-transfer-cest-mri
#14
Kyle M Jones, Alyssa C Pollard, Mark D Pagel
Chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) has been developed and employed in multiple clinical imaging research centers worldwide. Selective radiofrequency (RF) saturation pulses with standard 2D and 3D MRI acquisition schemes are now routinely performed, and CEST MRI can produce semiquantitative results using magnetization transfer ratio asymmetry (MTRasym ) analysis while accounting for B0 inhomogeneity. Faster clinical CEST MRI acquisition methods and more quantitative acquisition and analysis routines are under development...
August 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28790205/comparative-genomics-of-bacillus-thuringiensis-reveals-a-path-to-specialized-exploitation-of-multiple-invertebrate-hosts
#15
Jinshui Zheng, Qiuling Gao, Linlin Liu, Hualin Liu, Yueying Wang, Donghai Peng, Lifang Ruan, Ben Raymond, Ming Sun
Understanding the genetic basis of host shifts is a key genomic question for pathogen and parasite biology. The Bacillus cereus group, which encompasses Bacillus thuringiensis and Bacillus anthracis, contains pathogens that can infect insects, nematodes, and vertebrates. Since the target range of the essential virulence factors (Cry toxins) and many isolates is well known, this group presents a powerful system for investigating how pathogens can diversify and adapt to phylogenetically distant hosts. Specialization to exploit insects occurs at the level of the major clade and is associated with substantial changes in the core genome, and host switching between insect orders has occurred repeatedly within subclades...
August 8, 2017: MBio
https://www.readbyqxmd.com/read/28789529/structure-dynamics-and-electron-transfer-of-azurin-bound-to-gold-electrode
#16
Anna Rita Bizzarri, Chiara Baldacchini, Salvatore Cannistraro
Blue copper redox protein Azurin (AZ) constitutes an ideal active element for building bio-nano-optoelectronic devices based on the intriguing interplay among its electron transfer (ET), vibrational and optical properties. A full comprehension of its dynamical and functional behaviour is required for efficient applications. Here, AZ bound to gold electrode via its disulphide bridge was investigated by a Molecular Dynamics simulation approach taking into account for gold electron polarization which provides a more realistic description of the protein-gold interaction...
August 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28777228/the-disputed-discovery-of-facial-and-trigeminal-nerve-function-revisiting-the-contributions-of-herbert-mayo-and-charles-bell
#17
Matthew L Carlson, James Bradley, Jamie J Van Gompel, R Shane Tubbs
BACKGROUND: The first description of the voluntary motor function of the facial nerve and separate sensory-motor contributions of the trigeminal nerve is most commonly attributed to Charles Bell. However, a review of the original scientific accounts and subsequent historical publications question the validity of this credit. The objective of the present historical analysis is to clarify the contributions of Herbert Mayo toward discovering the functions of the fifth and seventh cranial nerves and to raise awareness of this historical controversy within the medical literature...
August 2, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28776996/molecular-dynamics-simulations-on-gas-phase-proteins-with-mobile-protons-inclusion-of-all-atom-charge-solvation
#18
Lars Konermann
Molecular dynamics (MD) simulations have become a key tool for examining the properties of electrosprayed protein ions. Traditional force fields employ static charges on titratable sites, whereas in reality, protons are highly mobile in gas-phase proteins. Earlier studies tackled this problem by adjusting charge patterns during MD runs. Within those algorithms, proton redistribution was subject to energy minimization, taking into account electrostatic and proton affinity contributions. However, those earlier approaches described (de)protonated moieties as point charges, neglecting charge solvation, which is highly prevalent in the gas phase...
August 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28774242/adductor-tenotomy-combined-with-palmar-capsulodesis-for-spastic-thumb-in-palm-deformity-in-cerebral-palsy-description-of-a-surgical-technique-and-clinical-results
#19
García Luis-Alejandro, Gómez Bárbara
BACKGROUND: Spastic thumb deformity in cerebral palsy significantly impedes hand function. Flexion-adduction forces across the first ray is the result from imbalance between intrinsic and extrinsic muscles. Multiples surgeries have been devised for the treatment of this condition such as contracture release and by tendon transfers for balancing the muscles forces. We report the results of a less demanding surgical technique, intended to avoid hyperextension of the metacarpophalangeal joint previously described in other series...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28773845/low-threshold-and-high-intensity-random-lasing-enhanced-by-mncl%C3%A2
#20
Zhenzhen Shang, Mingchao Yang, Luogen Deng
Energy transfer is known to have a significant influence on random lasers. However, the study about the effect of energy transfer between metallic salt and dye molecules on random lasers is still lacking at present. Here, we investigate random lasing actions in Pyrromethene-597 (PM597), PM597-doped MnCl₂ (manganese (II) chloride), PM597-doped polymer-dispersed liquid crystal (PDLC) and PM597-doped PDLC with MnCl₂ capillary systems. We find that random lasing of the systems with MnCl₂ exhibits lower threshold, higher intensity, sharper peak and variable resonance wavelength in comparison with the systems without MnCl₂...
August 24, 2016: Materials
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