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https://www.readbyqxmd.com/read/28805395/a-strategy-for-the-co-assembly-of-co-axial-nanotube-polymer-hybrids
#1
Mingyang Ji, Mahesh B Dawadi, Alexandria R LaSalla, Yuan Sun, David A Modarelli, Jon Robert Parquette
Nanostructured materials having multiple, discrete domains of sorted components are particularly important to create efficient optoelectronics. The construction of multicomponent nanostructures from self-assembled components is exceptionally challenging due to the propensity of noncovalent materials to undergo structural reorganization in the presence of excipient polymers. This work demonstrates that polymer-nanotube composites comprised of a self-assembled nanotube wrapped with two conjugated polymers could be assembled using a layer-by-layer approach...
August 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28804731/eye-tracking-in-catheter-based-cardiovascular-interventions-early-results
#2
Peter Lanzer, Mohammad Al-Naser, Syed Saqib Bukhari, Andreas Dengel, Elizabeth A Krupinski
Visual x-ray image processing (XRIP) represents a fundamental component of catheter-based cardiovascular interventions (CBCVIs). To date, no data are available to define XRIP in this setting. To characterize CBCVI XRIP, we developed a computer-based method allowing continuous temporal-spatial analysis of data recorded by a head-mounted eye-tracking device. Quantitative analysis of gaze duration of an expert operator (EO) revealed that the average time in minutes spent viewing the images on the display screen was [Formula: see text] and [Formula: see text] of the total recorded time in coronary angiography (CA) and in CA followed by CBCVI, respectively...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28804493/a-comprehensive-biophysical-model-of-ion-and-water-transport-in-plant-roots-i-clarifying-the-roles-of-endodermal-barriers-in-the-salt-stress-response
#3
Kylie J Foster, Stanley J Miklavcic
In this paper, we present a detailed and comprehensive mathematical model of active and passive ion and water transport in plant roots. Two key features are the explicit consideration of the separate, but interconnected, apoplastic, and symplastic transport pathways for ions and water, and the inclusion of both active and passive ion transport mechanisms. The model is used to investigate the respective roles of the endodermal Casparian strip and suberin lamellae in the salt stress response of plant roots. While it is thought that these barriers influence different transport pathways, it has proven difficult to distinguish their separate functions experimentally...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28803365/energy-drinks-and-their-component-modulate-attention-memory-and-antioxidant-defences-in-rats
#4
M T Costa Valle, N S Couto-Pereira, C Lampert, D M Arcego, A P Toniazzo, R P Limberger, E Dallegrave, C Dalmaz, M D Arbo, M B Leal
PURPOSE: This study aimed to evaluate the effects of the subchronic consumption of energy drinks and their constituents (caffeine and taurine) in male Wistar rats using behavioural and oxidative measures. METHODS: Energy drinks (ED 5, 7.5, and 10 mL/kg) or their constituents, caffeine (3.2 mg/kg) and taurine (40 mg/kg), either separately or in combination, were administered orally to animals for 28 days. Attention was measured though the ox-maze apparatus and the object recognition memory test...
August 12, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28803255/panel-of-serum-metabolites-discriminates-cancer-patients-and-healthy-participants-of-lung-cancer-screening-a-pilot-study
#5
Małgorzata Roś-Mazurczyk, Anna Wojakowska, Łukasz Marczak, Krzysztof Polański, Monika Pietrowska, Joanna Polanska, Rafał Dziadziuszko, Jacek Jassem, Witold Rzyman, Piotr Widlak
INTRODUCTION: Blood biomarkers may support early diagnosis of lung cancer by enabling pre-selection of candidates for computed tomography screening or discrimination between benign and malignant screening-detected nodules. We aimed to identify features of serum metabolome distinguishing individuals with early-detected lung cancer from healthy participants of the lung cancer screening program. METHODS: Blood samples were collected in the course of a low-dose computed tomography screening program performed in the Gdansk district (Northern Poland)...
August 12, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28802856/different-mathematical-processing-of-absorption-ratio-and-derivative-spectra-for-quantification-of-mixtures-containing-minor-component-an-application-to-the-analysis-of-the-recently-co-formulated-antidiabetic-drugs-canagliflozin-and-metformin
#6
Hayam M Lotfy, Dalia Mohamed, Mona S Elshahed
In the presented work several spectrophotometric methods were performed for the quantification of canagliflozin (CGZ) and metformin hydrochloride (MTF) simultaneously in their binary mixture. Two of these methods; response correlation (RC) and advanced balance point-spectrum subtraction (ABP-SS) were developed and introduced for the first time in this work, where the latter method (ABP-SS) was performed on both the zero order and the first derivative spectra of the drugs. Besides, two recently established methods; advanced amplitude modulation (AAM) and advanced absorbance subtraction (AAS) were also accomplished...
August 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28801797/planar-covariance-of-upper-and-lower-limb-elevation-angles-during-hand-foot-crawling-in-healthy-young-adults
#7
M J MacLellan, G Catavitello, Y P Ivanenko, F Lacquaniti
Habitual quadrupeds have been shown to display a planar covariance of segment elevation angle waveforms in the fore and hind limbs during many forms of locomotion. The purpose of the current study was to determine if humans generate similar patterns in the upper and lower limbs during hand-foot crawling. Nine healthy young adults performed hand-foot crawling on a treadmill at speeds of 1, 2, and 3 km/h. A principal component analysis (PCA) was applied to the segment elevation angle waveforms for the upper (upper arm, lower arm, and hand) and lower (thigh, shank, and foot) limbs separately...
August 11, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28801250/decoding-fmri-activity-in-the-time-domain-improves-classification-performance
#8
REVIEW
João Loula, Gaël Varoquaux, Bertrand Thirion
Most current functional Magnetic Resonance Imaging (fMRI) decoding analyses rely on statistical summaries of the data resulting from a deconvolution approach: each stimulation event is associated with a brain response. This standard approach leads to simple learning procedures, yet it is ill-suited for decoding events with short inter-stimulus intervals. In order to overcome this issue, we propose a novel framework that separates the spatial and temporal components of the prediction by decoding the fMRI time-series continuously, i...
August 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/28801232/nlrp6-and-asc-dependent-inflammasomes-do-not-shape-the-commensal-gut-microbiota-composition
#9
Michail Mamantopoulos, Francesca Ronchi, Filip Van Hauwermeiren, Sara Vieira-Silva, Bahtiyar Yilmaz, Liesbet Martens, Yvan Saeys, Stefan K Drexler, Amir S Yazdi, Jeroen Raes, Mohamed Lamkanfi, Kathy D McCoy, Andy Wullaert
The gut microbiota regulate susceptibility to multiple human diseases. The Nlrp6-ASC inflammasome is widely regarded as a hallmark host innate immune axis that shapes the gut microbiota composition. This notion stems from studies reporting dysbiosis in mice lacking these inflammasome components when compared with non-littermate wild-type animals. Here, we describe microbial analyses in inflammasome-deficient mice while minimizing non-genetic confounders using littermate-controlled Nlrp6-deficient mice and ex-germ-free littermate-controlled ASC-deficient mice that were all allowed to shape their gut microbiota naturally after birth...
August 2, 2017: Immunity
https://www.readbyqxmd.com/read/28800603/genetic-variants-specific-to-aging-related-verbal-memory-insights-from-gwass-in-a-population-based-cohort
#10
Thalida E Arpawong, Neil Pendleton, Krisztina Mekli, John J McArdle, Margaret Gatz, Chris Armoskus, James A Knowles, Carol A Prescott
Verbal memory is typically studied using immediate recall (IR) and delayed recall (DR) scores, although DR is dependent on IR capability. Separating these components may be useful for deciphering the genetic variation in age-related memory abilities. This study was conducted to (a) construct individual trajectories in IR and independent aspects of delayed recall, or residualized-DR (rDR), across older adulthood; and (b) identify genetic markers that contribute to four estimated phenotypes: IR and rDR levels and changes after age 60...
2017: PloS One
https://www.readbyqxmd.com/read/28800523/quantification-of-cyclocreatine-in-mouse-and-rat-plasma-using-hydrophilic-interaction-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#11
Amy Q Wang, Emma Hughes, Wenwei Huang, Edward H Kerns, Xin Xu
An accurate, rapid and selective method was developed to quantify cyclocreatine in mouse and rat plasma using hydrophilic interaction (HILIC) ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The plasma samples were prepared by protein precipitation with acetonitrile:methanol (70:30). Chromatographic separation was performed on a HILIC BEH amide column (2.1mm×50mm, 1.7μm) with a 3min gradient elution at a flow rate of 0.5mL/min. For mass spectrometric detection, selected reaction monitoring (SRM) was used; the SRM transitions were m/z 144→98 and m/z 144→56 for cyclocreatine and m/z 148→102 for the internal standard (D4-cyclocreatine) in the positive ionization mode...
July 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28799753/theoretical-investigation-of-c-h-vibrational-spectroscopy-ii-unified-assignment-method-of-ir-raman-and-sfg-spectra-of-ethanol
#12
Lin Wang, Tatsuya Ishiyama, Akihiro Morita
Using the flexible and polarizable model in the preceding paper I, we performed comprehensive analysis of C-H stretching vibrations of ethanol and partially deuterated ones by molecular dynamics (MD) simulation. The overlapping band structures of C-H stretching region including (i) methyl and methylene, (ii) number of modes with Fermi resonances, and (iii) different trans/gauche conformers are disentangled by various analysis methods, such as isotope exchange, empirical potential parameter shift analysis, and separate calculations of conformers...
August 11, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28799486/development-and-validation-of-chemometric-spectrophotometric-methods-for-simultaneous-determination-of-simvastatin-and-nicotinic-acid-in-binary-combinations
#13
Shoeb Alahmad, Hamed M Elfatatry, Mokhtar M Mabrouk, Sherin F Hammad, Fotouh R Mansour
BACKGROUND: The development and introduction of combined therapy represent a challenge for analysis due to severe overlapping of their UV spectra in case of spectroscopy or the requirement of a long tedious and high cost separation technique in case of chromatography. Quality control laboratories have to develop and validate suitable analytical procedures in order to assay such multi component preparations. METHOD: New spectrophotometric methods for the simultaneous determination of simvastatin (SIM) and nicotinic acid (NIA) in binary combinations were developed...
August 10, 2017: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/28799389/dispersed-fluorescence-spectroscopy-of-the-sicn-a%C3%AC-2-%C3%AE-x%C3%AC-2-%C3%AE-system-observation-of-some-vibrational-levels-with-chaotic-characteristics
#14
Masaru Fukushima, Takashi Ishiwata
The laser induced fluorescence (LIF) spectrum of the à (2)Δ - X̃ (2)Π transition was obtained for SiCN generated by laser ablation under supersonic free jet expansion. The vibrational structures of the dispersed fluorescence (DF) spectra from single vibronic levels (SVL's) were analyzed with consideration of the Renner-Teller (R-T) interaction. Analysis of the pure bending (ν2) structure by a perturbation approach including R-T, anharmonicity, spin-orbit (SO), and Herzberg-Teller (H-T) interactions indicated considerably different spin splitting for the μ and κ levels of the X̃ (2)Π state of SiCN, in contrast to identical spin splitting for general species derived from the perturbation approach, where μ and κ specify the lower and upper levels, respectively, separated by R-T...
December 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28799016/intraparenchymal-intracranial-pressure-monitoring-for-hydrocephalus-and-cerebrospinal-fluid-disorders
#15
Aswin Chari, Debayan Dasgupta, Alexander Smedley, Claudia Craven, Edward Dyson, Samir Matloob, Simon Thompson, Lewis Thorne, Ahmed K Toma, Laurence Watkins
BACKGROUND: Elective intraparenchymal intracranial pressure (ICP) monitoring is useful for the diagnosis and treatment of hydrocephalus and cerebrospinal fluid (CSF) disorders. This retrospective study analyzes median ICP and pulse amplitude (PA) recordings in neurosurgically naïve patients undergoing elective ICP monitoring for suspected CSF disorders. METHODS: Retrospective review of prospectively collated database of neurosurgically naïve patients undergoing elective ICP monitoring for suspected hydrocephalus and CSF disorders...
August 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28798936/antidiabetic-micro-nanoaggregates-from-ge-gen-qin-lian-tang-decoction-increase-absorption-of-baicalin-and-cellular-antioxidant-activity-in-vitro
#16
Dai Lin, Qian Du, Huiqin Wang, Guanzhen Gao, Jianwu Zhou, Lijing Ke, Tianbao Chen, Chris Shaw, Pingfan Rao
The antidiabetic effects of Ge-Gen-Qin-Lian-Tang decoction (GQD) have been proven clinically. In a pharmacological study conducted on STZ-induced diabetic rats, the constitutive aggregates/sediments of Ge-Gen-Qin-Lian-Tang decoction exhibited stronger hypoglycemic and antioxidant activities compared to the soluble compositions. This study aims to demonstrate the pharmacological properties of aggregates derived from GQD by measuring permeability of the active monomer phytochemicals (e.g., baicalin) in a Caco-2 cell monolayer and determine the cellular viability, intracellular redox status (MDA and SOD), and insulin secretion of pancreatic β-cell line, INS-1, following STZ-induced oxidative stress...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28798222/an-integrated-approach-to-explore-composition-and-dynamics-of-cholesterol-rich-membrane-microdomains-in-sexual-stages-of-malaria-parasite
#17
Federica Fratini, Carla Raggi, Gabriella Sferra, Cecilia Birago, Anna Sansone, Felicia Grasso, Chiara Curr Agrave, Anna Olivieri, Tomasino Pace, Stefania Mochi, Leonardo Picci, Carla Ferreri, Antonella Di Biase, Elisabetta Pizzi, Marta Ponzi
Membrane microdomains that include lipid rafts, are involved in key physiological and pathological processes and participate in the entry of endocellular pathogens. These assemblies, enriched in cholesterol and sphingolipids, form highly dynamic, liquid-ordered phases that can be separated from the bulk membranes thanks to their resistance to solubilization by non-ionic detergents. To characterize complexity and dynamics of detergent-resistant membranes of sexual stages of the rodent malaria parasite Plasmodium berghei, here we propose an integrated study of raft components based on proteomics, lipid analysis and bioinformatics...
August 10, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28797754/fabrication-of-metal-free-two-dimensional-two-dimensional-homojunction-photocatalyst-using-various-carbon-nitride-nanosheets-as-building-blocks
#18
Boyong Ye, Xiaoxue Han, Mengdie Yan, Huanhuan Zhang, Fengna Xi, Xiaoping Dong, Jiyang Liu
Semiconductor photocatalysis currently suffered three main problems, low solar energy utilization, high photo-generated charge recombination rate and the heavy metal ions release by the photo-corrosion. Herein, we developed a visible-light-driven homojunction photocatalyst with the metal-free two-dimensional (2D) graphitic carbon nitride nanosheets (CNNS). By employing liquid exfoliation and chemical blowing approaches, we obtained two kinds of CNNS materials (le-CNNS and cb-CNNS) with different band structures, and subsequently fabricated the homojunction photocatalyst...
August 2, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28796570/pedigree-analysis-of-familial-primary-concomitant-horizontal-strabismus-in-northern-india
#19
Zia Chaudhuri, Jibin John, Satinder Aneja, B K Thelma
PURPOSE: Familial clustering of common forms of primary strabismus like esotropia (ET) and exotropia (XT) is observed in a proportion of the strabismus cohort. The genetic components of this remain unidentified. Linkage studies have demonstrated susceptibility locus for primary strabismus at the STBMS1 locus on 7p22.1 as well as other loci on 4q28.3 and 7q31.2. Recently next generation sequencing (NGS) technology has emerged as a powerful tool in discovery genomics and a large number of novel disease-causing variants are being reported...
August 10, 2017: Strabismus
https://www.readbyqxmd.com/read/28795817/achieving-high-performances-of-nondoped-oleds-using-carbazole-and-diphenylphosphoryl-functionalized-ir-iii-complexes-as-active-components
#20
Hui-Ting Mao, Chun-Xiu Zang, Guo-Gang Shan, Hai-Zhu Sun, Wen-Fa Xie, Zhong-Min Su
Nondoped electroluminescent devices offer advantages over their doped counterparts such as good reproducibility, reduced phase separation between host and guest materials, and potential of lower-cost devices. However, low luminance efficiencies and significant roll-off values are longstanding issues for nondoped devices, and a rational design strategy for the preparation of efficient phosphors is highly desired. In this work, cyclometalated Ir(III) complexes 3CzIr(mtpy), 4CzIr(mtpy), 3POIr(mtpy), and 4POIr(mtpy) bearing carbazole (Cz) or diphenylphosphoryl (Ph2PO) groups substituted at different positions of 1,2-diphenyl-H-benzimidazole (HPBI) were designed and synthesized...
August 10, 2017: Inorganic Chemistry
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