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https://www.readbyqxmd.com/read/29150616/nmr-metabolomics-for-stem-cell-type-discrimination
#1
Franca Castiglione, Monica Ferro, Evangelos Mavroudakis, Rosalia Pellitteri, Patrizia Bossolasco, Damiano Zaccheo, Massimo Morbidelli, Vincenzo Silani, Andrea Mele, Davide Moscatelli, Lidia Cova
Cell metabolism is a key determinant factor for the pluripotency and fate commitment of Stem Cells (SCs) during development, ageing, pathological onset and progression. We derived and cultured selected subpopulations of rodent fetal, postnatal, adult Neural SCs (NSCs) and postnatal glial progenitors, Olfactory Ensheathing Cells (OECs), respectively from the subventricular zone (SVZ) and the olfactory bulb (OB). Cell lysates were analyzed by proton Nuclear Magnetic Resonance ((1)H-NMR) spectroscopy leading to metabolites identification and quantitation...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137788/ultrasonic-assisted-manufacturing-of-new-hydrogel-nanocomposite-biosorbent-containing-calcium-carbonate-nanoparticles-and-tragacanth-gum-for-removal-of-heavy-metal
#2
Shadpour Mallakpour, Amir Abdolmaleki, Farbod Tabesh
This article reports the first incorporation of calcium carbonate nanoparticles (CC NPs) into tragacanth gum (TG) to prepare a new hydrogel nanocomposite (HNC) system using a green, safe, and eco-friendly method, ultrasound irradiation as an efficient biosorbent of heavy metal ions from wastewater. Morphological studies revealed that the surface of obtained HNCs is rough, homogeneous, and porous-like due to the embedding of CC NPs as well as sonication in comparison to the neat TG which has a smooth surface...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29137763/mwcnt-tio2-hybrid-nano-filler-toward-high-performance-epoxy-composite
#3
Arun Kumar, Kaushal Kumar, P K Ghosh, K L Yadav
In this work, multi-walled carbon nanotubes (MWCNTs) are decorated by TiO2 nanoparticles and formed a new hybrid structure of filler (MWCNT/TiO2 hybrid filler). The MWCNT/TiO2 hybrid filler is reinforced in epoxy matrix and studied the mechanical and anti-corrosion properties of epoxy. The morphology of newly formed MWCNT/TiO2 hybrid nano filler has been studied using transmission electron microscopy (TEM). Field Emission Scanning Electron Microscope (FESEM) images of tensile fracture surface confirmed the superior dispersion of MWCNT/TiO2 in the epoxy matrix...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29136324/proton-transfer-reaction-dynamics-of-pyranine-in-dmso-water-mixture
#4
Prabhat Kumar Singh, Ankur Awasthi
Photo-induced intermolecular excited-state proton transfer (ESPT) reactions are ubiquitous in chemistry and biology. ESPT reactions are extremely sensitive to the nature of water molecules in its microenvironment and thus serve as a sensitive reporter for the water structure and dynamics in a system. Herein, the photo-induced intermolecular ESPT reaction of 8-Hydroxy pyrene-1, 3, 5-trisulfonic acid (HPTS, also known as Pyranine) has been investigated in various DMSO-water mixtures using steady-state and time-resolved emission spectroscopy...
November 14, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29135257/field-theoretic-simulations-of-the-distribution-of-nanorods-in-diblock-copolymer-thin-films
#5
Huikuan Chao, Benjamin J Lindsay, Robert A Riggleman
Using block copolymer microphases to guide the self-assembly of nanorods in thin films can give rise to polymeric materials with unique optical, thermal and mechanical properties beyond those found in neat block copolymers. Often the design and manufacture of the materials require exquisite control of the nanorod distribution, which is experimentally challenging due to the large parameter space spanned by this class of materials. Simulation approaches, on the other hand, can access the thermodynamics that contribute to the nanorod distribution and hence offer valuable aide upon the design and manufacture of the materials...
November 14, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29134083/preparation-of-surlyn-films-reinforced-with-cellulose-nanofibres-and-feasibility-of-applying-the-transparent-composite-films-for-organic-photovoltaic-encapsulation
#6
Anantaya Lertngim, Manisara Phiriyawirut, Jatuphorn Wootthikanokkhan, Kitti Yuwawech, Weradesh Sangkhun, Pisist Kumnorkaew, Tanyakorn Muangnapoh
This research concerns the development of Surlyn film reinforced with micro-/nanofibrillated celluloses (MFC) for use as an encapsulant in organic photovoltaic (OPV) cells. The aim of this work was to investigate the effects of fibre types and the mixing methods on the structure-properties of the composite films. Three types of cellulose micro/nanofibrils were prepared: the as-received MFC, the dispersed MFC and the esterified MFC. The fibres were mixed with Surlyn via an extrusion process, using two different mixing methods...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29133089/cellulose-gum-and-copper-nanoparticles-based-hydrogel-as-antimicrobial-agents-against-urinary-tract-infection-uti-pathogens
#7
Abdullah M Al-Enizi, Tansir Ahamad, Abdullah Baker Al-Hajji, Jahangeer Ahmed, Anis Ahmad Chaudhary, Saad M Alshehri
In the present study, stable copper nanoparticles (CuNPs) were successfully prepared in the hydrogel matrix. The prepared nanocomposite (HCuNPs) was characterized via x-ray diffraction (XRD), electron microscopy (TEM), and energy-dispersive (EDX) and x-ray photoelectron spectroscopic (XPS) studies. The wide scan XPS spectra support the presence of C, N and O in neat hydrogel; while, the XPS spectra of HCuNPs demonstrate the presence of Cu along with C, N, and O elements. TEM studies show the formation of spherical shaped CuNPs in the size range from 7 to 12nm...
November 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29132499/use-of-medical-emergency-call-data-as-a-marker-of-quality-of-emergency-department-care-in-the-post-national-emergency-access-target-era
#8
Lorraine Westacott, Judy Graves, Mohsina Khatun, John Burke
Objectives Any new model of care should always be accompanied by rigorous monitoring to ensure that there are no negative consequences, especially any that impact upon patient safety. In 2013, 'THERMoSTAT' (Two- Hour Evaluation and Referral Model for Shorter Turnaround Times), an emergency department model of care developed by Royal Brisbane and Women's Hospital staff was launched to gain efficiencies and improve hospital National Emergency Access Target (NEAT) compliance. The aim of this study was to trial the use of medical emergency call data as a novel marker of the quality of care delivered by our emergency department...
November 14, 2017: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/29131931/covariate-adjusted-spearman-s-rank-correlation-with-probability-scale-residuals
#9
Qi Liu, Chun Li, Valentine Wanga, Bryan E Shepherd
It is desirable to adjust Spearman's rank correlation for covariates, yet existing approaches have limitations. For example, the traditionally defined partial Spearman's correlation does not have a sensible population parameter, and the conditional Spearman's correlation defined with copulas cannot be easily generalized to discrete variables. We define population parameters for both partial and conditional Spearman's correlation through concordance-discordance probabilities. The definitions are natural extensions of Spearman's rank correlation in the presence of covariates and are general for any orderable random variables...
November 13, 2017: Biometrics
https://www.readbyqxmd.com/read/29128943/effects-of-biochar-on-phytotoxicity-and-translocation-of-polybrominated-diphenyl-ethers-in-ni-fe-bimetallic-nanoparticle-treated-soil
#10
Juan Wu, Yunqiang Yi, Zhanqiang Fang, Eric Pokeung Tsang
In this study, soil culture experiments were conducted to explore the effects of biochar-supported Ni/Fe nanoparticles on the accumulation and translocation of polybrominated diphenyl ethers (PBDEs) in soil-plant system and its phytotoxicity to Brassica chinensis. Compared with those in BDE209 contaminated soils (S 1) and Ni/Fe nanoparticle-treated soil (S 3), the plant biomass, root, and shoot lengths in biochar-supported Ni/Fe nanoparticle-treated soil (S 4) were increased by 23 mg, 1.35 cm, and 2.08 cm and 27...
November 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29128835/star-poly-%C3%AE%C2%B5-caprolactone-based-electrospun-fibers-as-biocompatible-scaffold-for-doxorubicin-with-prolonged-drug-release-activity
#11
Preethi Balakrishnan, Lorenza Gardella, Mahdi Forouharshad, Teresa Pellegrino, Orietta Monticelli
In this work, a novel drug delivery system consisting of poly(ε-caprolactone) (PCL) electrospun fibers containing an ad-hoc-synthesized star polymer made up of a poly(amido-amine) (PAMAM) core and PCL branches (PAMAM-PCL) was developed. The latter system which was synthesized via the ring opening polymerization of ε-caprolactone, starting from a hydroxyl-terminated PAMAM dendrimer and characterized by means of (1)H NMR, IR and DSC, was found to be compatible with both the polymer matrix and a hydrophilic chemotherapeutic drug, doxorubicin (DOXO), the model drug used in this work...
November 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29125769/is-solute-rotation-in-an-ionic-liquid-influenced-by-the-addition-of-glucose
#12
Rajan Maurya, Sudhanshu Naithani, Dibyendu Bandyopadhyay, Niharendu Choudhury, G Bhaskar Dutt
Fluorescence anisotropy measurements and molecular dynamics simulations (MD) have been performed to understand the specific interactions of two structurally similar nondipolar solutes, 2,5-dimethyl-1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DMDPP) and 1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (DPP) with neat 1-butyl-3-methylimidazolium dicyanamide ([BMIM][N(CN)2]) and also in the presence of glucose. It has been observed that the measured reorientation times of DMDPP in neat [BMIM][N(CN)2] follow the predictions of Stokes-Einstein-Debye hydrodynamic theory with slip boundary condition...
November 10, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29125535/an-intelligent-cooperative-visual-sensor-network-for-urban-mobility
#13
Giuseppe Riccardo Leone, Davide Moroni, Gabriele Pieri, Matteo Petracca, Ovidio Salvetti, Andrea Azzarà, Francesco Marino
Smart cities are demanding solutions for improved traffic efficiency, in order to guarantee optimal access to mobility resources available in urban areas. Intelligent video analytics deployed directly on board embedded sensors offers great opportunities to gather highly informative data about traffic and transport, allowing reconstruction of a real-time neat picture of urban mobility patterns. In this paper, we present a visual sensor network in which each node embeds computer vision logics for analyzing in real time urban traffic...
November 10, 2017: Sensors
https://www.readbyqxmd.com/read/29115333/an-apolipoprotein-enriched-biomolecular-corona-switches-the-cellular-uptake-mechanism-and-trafficking-pathway-of-lipid-nanoparticles
#14
L Digiacomo, F Cardarelli, D Pozzi, S Palchetti, M A Digman, E Gratton, A L Capriotti, M Mahmoudi, G Caracciolo
Following exposure to biological milieus (e.g. after systemic administration), nanoparticles (NPs) get covered by an outer biomolecular corona (BC) that defines many of their biological outcomes, such as the elicited immune response, biodistribution, and targeting abilities. In spite of this, the role of BC in regulating the cellular uptake and the subcellular trafficking properties of NPs has remained elusive. Here, we tackle this issue by employing multicomponent (MC) lipid NPs, human plasma (HP) and HeLa cells as models for nanoformulations, biological fluids, and target cells, respectively...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29114853/the-evolution-of-the-manus-of-early-theropod-dinosaurs-is-characterized-by-high-inter-and-intraspecific-variation
#15
Daniel E Barta, Sterling J Nesbitt, Mark A Norell
The origin of the avian hand, with its reduced and fused carpals and digits, from the five-fingered hands and complex wrists of early dinosaurs represents one of the major transformations of manus morphology among tetrapods. Much attention has been directed to the later part of this transition, from four- to three-fingered taxa. However, earlier anatomical changes may have influenced these later modifications, possibly paving the way for a later frameshift in digit identities. We investigate the five- to four-fingered transition among early dinosaurs, along with changes in carpus morphology...
November 8, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29113432/graphene-oxide-filled-lignin-starch-polymer-bionanocomposite-structural-physical-and-mechanical-studies
#16
Meryem Aqlil, Annie Moussemba Nzenguet, Younes Essamlali, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
In this study, graphene oxide (GO) was investigated as a potential nanoreinforcing agent in starch/lignin (ST/L) biopolymer matrix. Bionanocomposite films based on ST/L blend matrix and GO were prepared by solution-casting technique of the corresponding film-forming solution. The structures, morphologies, and properties of bionanocomposite films were characterized by Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA), ultraviolet-visible (UV-vis), SEM, and tensile tests. The experimental results showed that content of GO have a significant influence on the mechanical properties of the produced films...
November 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29112402/combined-falling-drop-open-port-sampling-interface-system-for-automated-flow-injection-mass-spectrometry
#17
Gary J Van Berkel, Vilmos Kertesz, Matt Orcutt, Adam Bentley, Jim Glick, Jimmy Flarakos
The aim of this work was to demonstrate and to evaluate the analytical performance of a combined falling drop/open port sampling interface (OPSI) system as a simple noncontact, no-carryover, automated system for flow injection analysis with mass spectrometry. The falling sample drops were introduced into the OPSI using a widely available autosampler platform utilizing low cost disposable pipet tips and conventional disposable microtiter well plates. The volume of the drops that fell onto the OPSI was in the 7-15 μL range with an injected sample volume of several hundred nanoliters...
November 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29111059/highly-flexible-cross-linked-cellulose-nanofibril-sponge-like-aerogels-with-improved-mechanical-property-and-enhanced-flame-retardancy
#18
Limin Guo, Zhilin Chen, Shaoyi Lyu, Feng Fu, Siqun Wang
Cellulose nanofibril (CNF) aerogel is highly flammable and its mechanical strength is very soft, which is unfavourable due to safety concerns and impractical when used as the thermal insulation material. In this work, we used N-methylol dimethylphosphonopropionamide (MDPA) and 1,2,3,4-butanetetracarboxylic acid (BTCA) as co-additives and then prepared lightweight flame resistant CNF sponge-like aerogels via an eco-friendly freeze-drying and post cross-linking method. The CNF/BTCA/MDPA aerogel exhibited a better flame retardant performance, outstanding self-extinguishing behaviour and significantly increased char residue (by as much as 268%) compared with the neat CNF aerogel...
January 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29111048/ultra-high-mechanical-properties-of-porous-composites-based-on-regenerated-cellulose-and-cross-linked-poly-ethylene-glycol
#19
Jian Teng, Biao Yang, Liang-Qing Zhang, Sheng-Qiang Lin, Ling Xu, Gan-Ji Zhong, Jian-Hua Tang, Zhong-Ming Li
The ultra-high mechanical, biocompatible and biodegradable porous regenerated cellulose/poly(ethylene glycol) (RC/PEG) composites with double network structure were fabricated via an simple method to dissolve cellulose followed by UV irradiation. The porous structure of RC/PEG was sensitively altered by PEG contents, which led to the porous structure morphology transition from 3D fibrillar network to close-grained sheet-like-network with the loading of cross-linked PEG. The porous RC/PEG showed excellent mechanical properties, i...
January 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29105097/ultrafine-fibers-of-zein-and-anthocyanins-as-natural-ph-indicator
#20
Luciana Prietto, Vania Zanella Pinto, Shanise Lisie Mello El Halal, Michele Greque de Morais, Jorge Alberto Vieria Costa, Loong-Tak Lim, Alvaro Renato Guerra Dias, Elessandra da Rosa Zavareze
BACKGROUND: pH-sensitive indicator membranes, useful for pharmaceutical, food, and packaging applications, can be formed by encapsulating halochromic compounds within various solid supports. To this end, electrospinning is a versatile technique for the development of these indicators, by entrapping pH dyes within ultrafine polymer fibers. RESULTS: The ultrafine zein fibers, containing 5% (w/v) anthocyanins, had an average diameter of 510 nm. The pH-sensitive membrane exhibited color changes from pink to green, when exposed to acidic and alkaline buffers, respectively...
November 3, 2017: Journal of the Science of Food and Agriculture
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