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https://www.readbyqxmd.com/read/28231529/new-enantioselective-lc-method-development-and-validation-for-the-assay-of-modafinil
#1
Marianna Harvanová, Taťána Gondová
For the first time, a new, fast and sensitive chromatographic method for the separation and determination of modafinil enantiomers was developed on chiral stationary phase with macrocyclic glycopeptide teicoplanin in the polar organic mode. The effect of the mobile phase composition and column temperature on the retention and enantioseparation were studied. The separation was performed using a Chirobiotic T column (250×4.6mm, 5μm) with methanol and triethylamine (100/0.05, v/v) as the mobile phase at a flow rate of 1...
February 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28231505/assessing-remobilization-characteristics-of-arsenic-as-in-tributary-sediment-cores-in-the-largest-reservoir-china
#2
Li Gao, Bo Gao, Dongyu Xu, Wenqi Peng, Jin Lu, Jijun Gao
The environmental impact of the Three Gorges Reservoir (TGR) in China has raised widespread concern especially in relation to metal pollution. The diffusive gradient in thin films (DGT) technology was applied to investigate arsenic (As) remobilization in sediment cores collected from the main stream and a tributary in the TGR during July 2015. The results showed that the horizontal and vertical distributions of CDGT-As varied among the four sampling sites. For the same DGT probe, the horizontal distributions of CDGT-As (0-6mm, 6-12mm, 12-18mm) exhibited similarity in the overlying water and different tendencies in the sediment profiles; the vertical variations of CDGT-As showed different mobilization tendencies...
February 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28231484/exploratory-investigation-of-theoretical-predictors-of-nomophobia-using-the-mobile-phone-involvement-questionnaire-mpiq
#3
Lidia Argumosa-Villar, Joan Boada-Grau, Andreu Vigil-Colet
Despite the advantages that the development of new technologies has brought to our lives, it is also true that the problematic use of technology can have negative effects on some people, as the prevalence of nomophobia, defined as the fear and anxiety of being unreachable via one's mobile phone. While some authors are beginning to study the relationship of nomophobia with variables such as age, no investigation has yet been carried out into psychological variables. Our study contributes to the literature by looking at personality, self-esteem, gender and age as predictors of nomophobia, evaluated by the Mobile Phone Involvement Questionnaire (MPIQ)...
February 20, 2017: Journal of Adolescence
https://www.readbyqxmd.com/read/28231480/feasibility-and-acceptability-of-post-hospitalization-ecological-momentary-assessment-in-patients-with-psychotic-spectrum-disorders
#4
Ethan Moitra, Brandon A Gaudiano, Carter H Davis, Dror Ben-Zeev
BACKGROUND: Up to 50% of patients with psychotic-spectrum disorders are medication nonadherent. The use of real-time assessment via ecological momentary assessment (EMA) on mobile devices might offer important insights into adherence behaviors that cannot be measured in the clinic. However, existing EMA studies have only studied acutely ill patients during hospitalization or more stable patients in the community. METHODS: Feasibility and acceptability of EMA in 65 patients with psychotic-spectrum disorders who were recently discharged from the hospital were assessed...
February 7, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28231340/the-widely-used-nicotiana-benthamiana-16c-line-has-an-unusual-t-dna-integration-pattern-including-a-transposon-sequence
#5
Joshua G Philips, Fatima Naim, Michał T Lorenc, Kevin J Dudley, Roger P Hellens, Peter M Waterhouse
Nicotiana benthamiana is employed around the world for many types of research and one transgenic line has been used more extensively than any other. This line, 16c, expresses the Aequorea victoria green fluorescent protein (GFP), highly and constitutively, and has been a major resource for visualising the mobility and actions of small RNAs. Insights into the mechanisms studied at a molecular level in N. benthamiana 16c are likely to be deeper and more accurate with a greater knowledge of the GFP gene integration site...
2017: PloS One
https://www.readbyqxmd.com/read/28231244/unexpectedly-high-leprosy-seroprevalence-detected-using-a-random-surveillance-strategy-in-midwestern-brazil-a-comparison-of-elisa-and-a-rapid-diagnostic-test
#6
Marco Andrey C Frade, Natália A de Paula, Ciro M Gomes, Sebastian Vernal, Fred Bernardes Filho, Helena B Lugão, Marilda M M de Abreu, Patrícia Botini, Malcolm S Duthie, John S Spencer, Rosa Castália F R Soares, Norma T Foss
BACKGROUND: Leprosy diagnosis is mainly based on clinical evaluation, although this approach is difficult, especially for untrained physicians. We conducted a temporary campaign to detect previously unknown leprosy cases in midwestern Brazil and to compare the performance of different serological tests. METHODS: A mobile clinic was stationed at the main bus terminal in Brasília, Brazil. Volunteers were quizzed and given a clinical exam to allow categorization as either patients, known contacts of patients or non-contacts, and blood was collected to determine anti-PGL-I and anti-LID-1 antibody titers by ELISA and by the NDO-LID rapid test...
February 23, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28231030/safety-of-patient-mobilization-and-rehabilitation-in-the-icu-systematic-review-with-meta-analysis
#7
Peter Nydahl, Thiti Sricharoenchai, Saurabh Chandra, Firuzan Sari Kundt, Minxuan Huang, Magdalena Fischill, Dale M Needham
BACKGROUND: Early mobilization and rehabilitation of patients in intensive care units (ICU) may improve physical function, and reduce the duration of delirium, mechanical ventilation and ICU length of stay. However, safety concerns are an important barrier to widespread implementation. OBJECTIVE: To synthesize safety data regarding patient mobilization and rehabilitation in the ICU, including falls, removal of endotracheal tubes (ETT), removal or dysfunction of intravascular catheters, removal of other catheters/tubes, cardiac arrest, hemodynamic changes and desaturation...
February 23, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28231017/boosting-hole-mobility-in-coherently-strained-110-oriented-ge-si-core-shell-nanowires
#8
Sonia Conesa-Boj, Ang Li, Sebastian Koelling, Matthias Brauns, Joost Ridderbos, Ton T Nguyen, Marcel A Verheijen, Paul M Koenraad, Floris Arnoud Zwanenburg, Erik P A M Bakkers
The ability of core-shell nanowires to overcome existing limitations of heterostructures is one of the key ingredients for the design of next generation devices. This requires a detailed understanding of the mechanism for strain relaxation in these systems, in order to eliminate strain-induced defect formation and thus to boost important electronic properties such as carrier mobility. Here we demonstrate how the hole mobility of [110]-oriented Ge-Si core-shell nanowires can be substantially enhanced thanks to the realization of large band offset and coherent strain in the system, reaching values as high as 4200 cm(2)/(Vs) at 4K and 1600 cm(2)/(Vs) at room temperature for high hole densities of 1019 cm(-3)...
February 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28231007/molecular-dynamics-recrystallization-behavior-and-water-solubility-of-amorphous-anticancer-agent-bicalutamide-and-its-polyvinylpyrrolidone-mixtures
#9
Justyna Szczurek, Marzena Rams-Baron, Justyna Knapik-Kowalczuk, Agata Antosik, Joanna Szafraniec, Witold Jamroz, Mateusz Dulski, Renata Jachowicz, Marian Paluch
In this paper, we investigated the molecular mobility and physical stability of amorphous bicalutamide, a poorly water-soluble drug widely used in prostate cancer treatment. Our broadband dielectric spectroscopy measurements and differential scanning calorimetry studies revealed that amorphous BIC is a moderately fragile material with strong tendency to recrystallize from amorphous state. However, mixing the drug with polymer polyvinylpyrrolidone results in a substantial improvement of physical stability attributed to antiplasticizing effect governing by polymer additive...
February 23, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28230974/femtogram-resolution-of-iron-content-on-a-per-cell-basis-ex-vivo-storage-of-human-red-blood-cells-leads-to-loss-of-hemoglobin
#10
Jeffrey J Chalmers, Xiaoxia Jin, Andre Francis Palmer, Peter Amaya, Mark H Yazer, Lee R Moore, Kyoung-Joo Park, X Jeff Pan, Maciej Zborowski
The magnetic characteristics of hemoglobin (Hb) changes with the binding of dioxygen (O2) to the heme prosthetic groups of the globin chains: from paramagnetic ferrous Hb to diamagnetic ferrous oxyhemoglobin (oxyHb) with reversibly bound O2, or paramagnetic ferric methemoglobin (metHb). When multiplied over the number of Hb molecules in a red blood cell (RBC), the effect is detectable through motion analysis of RBCs in a high magnetic field and gradient. This motion is referred to as magnetophoretic mobility which can be conveniently expressed as a fraction of the cell sedimentation coefficient...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230966/increasing-peak-capacity-in-non-targeted-omics-applications-by-combining-full-scan-field-asymmetric-waveform-ion-mobility-spectrometry-with-liquid-chromatography-mass-spectrometry
#11
Kayleigh L Arthur, Matthew A Turner, James C Reynolds, Colin S Creaser
Full scan field asymmetric waveform ion mobility spectrometry (FAIMS) combined with liquid chromatography and mass spectrometry (LC-FAIMS-MS) is shown to enhance peak capacity for omics applications. A miniaturized FAIMS device capable of rapid compensation field scanning has been incorporated into an ultra-high performance liquid chromatography (UHPLC) and time-of-flight (TOF) mass spectrometry analysis, allowing the acquisition of full scan FAIMS and MS nested data sets within the timescale of a UHPLC peak...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230777/cryptomphalus-aspersa-mollusc-egg-extract-promotes-regenerative-effects-in-human-dermal-papilla-stem-cells
#12
María Teresa Alameda, Esther Morel, Concepción Parrado, Salvador González, Ángeles Juarranz
The aim of this study was to test, by an in vitro approach, whether a natural extract derived from eggs of the mollusc Cryptomphalus aspersa (e-CAF) that seems to present regenerative properties, can enhance the mobilization of human hair dermal papilla cells (HHDPCs) and play a role on tissue repair and regeneration. We have tested HHDPCs proliferation by the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium-bromide (MTT) assay; cell migration by using a wound healing assay, as well as the modulation of the expression of cytoskeletal (F-actin and vimentin) and cell adhesion to the extracellular matrix (ECM) (vinculin and P-FAK) proteins...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28230757/simultaneous-quantification-of-nine-new-furanocoumarins-in-angelicae-dahuricae-radix-using-ultra-fast-liquid-chromatography-with-tandem-mass-spectrometry
#13
Lei Zhang, Wei Wei, Xiu-Wei Yang
A series of new furanocoumarins with long-chain hydrophobic groups, namely andafocoumarins A-H and J, have been isolated from the dried roots of Angelica dahurica cv. Hangbaizhi (Angelicae Dahuricae radix) in our previous study, among which andafocoumarins A and B were demonstrated to have better anti-inflammatory activity than the positive controls. In this work, a sensitive, accurate, and efficient ultra-fast liquid chromatography coupled with triple quadrupole mass spectrometer (UFLC-MS/MS) method was developed and validated for simultaneous quantification of above-mentioned nine compounds in four cultivars of Angelicae Dahuricae Radix...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28230745/toward-improving-electrocardiogram-ecg-biometric-verification-using-mobile-sensors-a-two-stage-classifier-approach
#14
Robin Tan, Marek Perkowski
Electrocardiogram (ECG) signals sensed from mobile devices pertain the potential for biometric identity recognition applicable in remote access control systems where enhanced data security is demanding. In this study, we propose a new algorithm that consists of a two-stage classifier combining random forest and wavelet distance measure through a probabilistic threshold schema, to improve the effectiveness and robustness of a biometric recognition system using ECG data acquired from a biosensor integrated into mobile devices...
February 20, 2017: Sensors
https://www.readbyqxmd.com/read/28230727/analyzing-the-effects-of-uav-mobility-patterns-on-data-collection-in-wireless-sensor-networks
#15
Sarmad Rashed, Mujdat Soyturk
Sensor nodes in a Wireless Sensor Network (WSN) can be dispersed over a remote sensing area (e.g., the regions that are hardly accessed by human beings). In such kinds of networks, datacollectionbecomesoneofthemajorissues. Getting connected to each sensor node and retrieving the information in time introduces new challenges. Mobile sink usage-especially Unmanned Aerial Vehicles (UAVs)-is the most convenient approach to covering the area and accessing each sensor node in such a large-scale WSN. However, the operation of the UAV depends on some parameters, such as endurance time, altitude, speed, radio type in use, and the path...
February 20, 2017: Sensors
https://www.readbyqxmd.com/read/28230685/first-letters-from-red-cross-nurses
#16
(no author information available yet)
Editor's note: From its first issue in 1900 to the present day, AJN has unparalleled archives detailing nurses' work and lives over more than a century. These articles not only chronicle nursing's growth as a profession within the context of the events of the day, but they also reveal prevailing societal attitudes about women, health care, and human rights. Today's nursing school curricula rarely include nursing's history, but it's a history worth knowing. To this end, From the AJN Archives highlights articles selected to fit today's topics and times...
March 2017: American Journal of Nursing
https://www.readbyqxmd.com/read/28230563/implementation-of-an-early-mobility-pathway-in-neurointensive-care-unit-patients-with-external-ventricular-devices
#17
Megan Moyer, Bethany Young, Joseph Borst, William Pino, Marisa Hart, Jesse LoBreglio, Derek Zaleski, Isaira Leonor, David Kung, Michelle Smith, Eric Zager, M Sean Grady, Monisha Kumar
BACKGROUND: Patients with an external ventricular drain (EVD) may not be readily mobilized because of concerns of catheter dislodgment and/or inappropriate cerebrospinal fluid drainage. Delayed mobilization may result in longer hospital stays and an increased risk for complications related to immobility. We aimed to determine the safety, feasibility, and outcome of an EVD mobilization protocol in patients with subarachnoid hemorrhage (SAH). METHODS: A multidisciplinary group developed a formal algorithm for the mobilization of patients with SAH with EVDs...
February 23, 2017: Journal of Neuroscience Nursing: Journal of the American Association of Neuroscience Nurses
https://www.readbyqxmd.com/read/28230536/p-channel-thin-film-transistors-using-reduced-graphene-oxide
#18
Somnath Chakraborty, A N Resmi, Renuka Pothuraju, K B Jinesh
Chemically reduced graphene oxide (rGO) samples with various degree of reduction were prepared using hydrazine hydrate as the reducing agent. Scanning tunnelling microscope (STM) imaging shows that rGO contains rows of randomly distributed patches of epoxy groups. The local density of states (LDOS) of the rGO samples were mapped with scanning tunnelling spectroscopy (STS), which shows that the bandgap in rGO originates from the epoxide regions itself. The Fermi level of the epoxide regions is shifted towards the valence band, making rGO locally p-type and a ranges of bandgaps from 0-2...
February 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28230535/gated-hall-effect-measurements-on-selectively-grown-ingaas-nanowires
#19
Fredrik Gustav Lindelöw, Cezar Zota, Erik Lind
InGaAs nanowires is one of the promising material systems of replacing silicon in future CMOS transistors, due to its high electron mobility, in combination with the excellent electrostatic control from the tri-gate geometry. In this article, we report on gated Hall measurements on single and multiple In0.85Ga0.15As nanowires, selectively grown in a Hall bridge geometry with nanowire widths down to 50 nm and thicknesses of 10 nm. The gated nanowires can be used as junctionless transistors, which allows for a simplified device processing as no regrowth of contact layer or ion implantation is needed, which is especially beneficial as transistor dimensions are scaled down...
February 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28230419/the-association-between-physical-performance-and-executive-function-in-a-sample-of-rural-older-adults-from-south-carolina-usa
#20
Ryan S Falck, Sara Wilcox, John R Best, Jessica L Chandler, Teresa Liu-Ambrose
BACKGROUND: Mobility and executive functions (EFs) decline with age, although associations between mobility and EFs are less clear. This study examined relationships between different mobility measures and EFs among rural older adults. METHODS: This cross-sectional study recruited 56 older adults (60+ years) in rural South Carolina. Mobility was assessed via gait speed, timed up-and-go, chair stand, and as a composite physical performance score (PPS). EFs was assessed via Trail Making Test, semantic fluency, and phonemic fluency...
March 2017: Experimental Aging Research
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