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https://www.readbyqxmd.com/read/29352892/synergistic-effect-of-carbon-nanotubes-and-graphene-for-high-performance-cellulose-acetate-membranes-in-biomedical-applications
#1
Mariana Ioniță, Livia Elena Crică, Stefan Ioan Voicu, Sorina Dinescu, Florin Miculescu, Marieta Costache, Horia Iovu
Comparative evaluation of innovative combinations of three types of carbon nanomaterial (CNM) highlighted membranes with important potential for biomedical applications. Non-solvent induced phase separation coupled with ultrasound technique was used to generate membranes comprised of (i) cellulose acetate/ammonia functionalized carbon nanotubes (CA/CNT), (ii) cellulose acetate/ammonia functionalized graphene oxide (CA/GO), and (iii) cellulose acetate/CNT-GO. Structural, topographical and thermal features as well as water and ethanol permeation, bovine serum albumin (BSA) and haemoglobin (Hb) rejection were evaluated...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352793/theoretical-study-of-tetrahedral-site-occupation-by-hydrogen-in-pd-nanoparticles
#2
Takayoshi Ishimoto, Michihisa Koyama
To understand the enhanced effects and new hydrogen absorption properties of metal nanoparticles, we theoretically investigated the hydrogen absorption in Pd nanoparticles, adopting the Pd405 model of ca. 2.5 nm by using density functional theory. Pd405 showed inhomogeneous geometric features, especially near the surface region. The hydrogen absorptions in octahedral (O) and tetrahedral (T) sites near the core region were stable and unstable, respectively, similar to the Pd bulk. We clearly demonstrated the possibility of hydrogen absorption in T sites near the surface of Pd405...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352785/markov-state-model-for-co2-binding-with-carbonic-anhydrase-under-confinement
#3
Gong Chen, Weina Xu, Diannan Lu, Jianzhong Wu, Zheng Liu
Enzyme immobilization with a nanostructure material can enhance its stability and facilitate reusability. However, the apparent activity is often compromised due to additional diffusion barriers and complex interactions with the substrates and solvent molecules. The present study elucidates the effects of the surface hydrophobicity of nano-confinement on CO2 diffusion to the active site of human carbonic anhydrase II (CA), an enzyme that is able to catalyze CO2 hydration at extremely high turnover rates. Using the Markov-state model in combination with coarse-grained molecular dynamics simulations, we demonstrate that a hydrophobic cage increases CO2 local density but hinders its diffusion towards the active site of CA under confinement...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352441/utility-of-tumor-burden-score-to-stratify-prognosis-of-patients-with-hepatocellular-cancer-results-of-4759-cases-from-ita-li-ca-study-group
#4
Alessandro Vitale, Quirino Lai, Fabio Farinati, Laura Bucci, Edoardo G Giannini, Lucia Napoli, Francesca Ciccarese, Gian Lodovico Rapaccini, Maria Di Marco, Eugenio Caturelli, Marco Zoli, Franco Borzio, Rodolfo Sacco, Giuseppe Cabibbo, Roberto Virdone, Fabio Marra, Martina Felder, Filomena Morisco, Luisa Benvegnù, Antonio Gasbarrini, Gianluca Svegliati-Baroni, Francesco Giuseppe Foschi, Gabriele Missale, Alberto Masotto, Gerardo Nardone, Antonio Colecchia, Mauro Bernardi, Franco Trevisani, Timothy M Pawlik
BACKGROUND: Dichotomous models like Milan Criteria represent the routinely used tools for predicting the outcome of patients with hepatocellular carcinoma (HCC). However, a paradigm shift from a dichotomous to continuous prognostic stratification should represent a good strategy for improving the prediction process. Recently, the tumor burden score (TBS) has been proposed for selecting patients with colorectal liver metastases. To date, TBS has not been validated in a large HCC population...
January 19, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29352332/effects-of-continuous-or-intermittent-low-magnitude-high-frequency-vibration-on-fracture-healing-in-sheep
#5
Yanhui Li, Guozhao Liu, Jing Yu, Chen Li, Lei Tan, Baohui Hao, Chao Liu, Junhao Lin, Dong Zhu, Xizheng Zhang
PURPOSE: Vibration therapy has been shown to improve fracture healing. In this study, we investigated the effects of continuous or different intermittent vibration regimens on fracture healing in sheep models on the basis of radiographs, mechanical, and biochemical testing. METHODS: The 63 right-hind metatarsals from 63 sheep (12-month-old) were osteotomized; followed by surgical fixation with a steel plate. Two weeks after the surgery, the sheep with right-hind metatarsal fractures were randomly divided into seven groups (n=9/group): control (no vibration treated), continuous vibration (CV), one, three, five, seven and 14-day intermittent vibration (named IV-1, -3, -5, -7, and -14, respectively) groups, which represented a cycle of the successive n-day vibration and successive n-day break...
January 19, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29352206/omega-3-carboxylic-acids-provide-efficacious-anti-inflammatory-activity-in-models-of-crystal-mediated-inflammation
#6
Cory Iverson, Andrew Bacong, Sha Liu, Scott Baumgartner, Torbjörn Lundström, Jan Oscarsson, Jeffrey N Miner
This study assesses the efficacy and exposure-response relationship of omega-3-carboxylic acids (OM-3 CA) in models of crystal-based inflammation. Human THP-1 macrophages and primary peripheral blood mononuclear cells exposed to multiple inflammatory crystal types were used to determine the anti-inflammatory potential of omega-3 (OM-3) fatty acids in vitro. Anti-inflammatory effects of OM-3 CA in vivo were tested in rat monosodium urate (MSU) crystal air pouch and rat knee intra-articular MSU injection models...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352137/iron-biogeochemistry-in-the-high-latitude-north-atlantic-ocean
#7
Eric P Achterberg, Sebastian Steigenberger, Chris M Marsay, Frédéric A C LeMoigne, Stuart C Painter, Alex R Baker, Douglas P Connelly, C Mark Moore, Alessandro Tagliabue, Toste Tanhua
Iron (Fe) is an essential micronutrient for marine microbial organisms, and low supply controls productivity in large parts of the world's ocean. The high latitude North Atlantic is seasonally Fe limited, but Fe distributions and source strengths are poorly constrained. Surface ocean dissolved Fe (DFe) concentrations were low in the study region (<0.1 nM) in summer 2010, with significant perturbations during spring 2010 in the Iceland Basin as a result of an eruption of the Eyjafjallajökull volcano (up to 2...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29351897/transitions-between-circulatory-states-after-out-of-hospital-cardiac-arrest-protocol-for-an-observational-prospective-cohort-study
#8
Halvor Langeland, Daniel Bergum, Magnus Løberg, Knut Bjørnstad, Jan Kristian Damås, Tom Eirik Mollnes, Nils-Kristian Skjærvold, Pål Klepstad
BACKGROUND: The post cardiac arrest syndrome (PCAS) is responsible for the majority of in-hospital deaths following cardiac arrest (CA). The major elements of PCAS are anoxic brain injury and circulatory failure. OBJECTIVE: This study aimed to investigate the clinical characteristics of circulatory failure and inflammatory responses after out-of-hospital cardiac arrest (OHCA) and to identify patterns of circulatory and inflammatory responses, which may predict circulatory deterioration in PCAS...
January 19, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29351747/combination-of-pelargonium-sidoides-and-coptis-chinensis-root-inhibits-nuclear-factor-kappa-b-mediated-inflammatory-response-in-vitro-and-in-vivo
#9
Sang Mi Park, Byung-Gu Min, Ji Yun Jung, Kyung Hwan Jegal, Chul Won Lee, Kwang Youn Kim, Young Woo Kim, Youn-Woong Choi, Il Je Cho, Sae Kwang Ku, Sang Chan Kim
BACKGROUND: Pelargonium sidoides (PS) and Coptis chinensis root (CR) have traditionally been used to treat various diseases, including respiratory and gastrointestinal infections, dysmenorrhea, and hepatic disorders. The present study was conducted to evaluate the anti-inflammatory effects of a combination of PS and CR in vitro and in vivo. METHODS: The in vitro effects of PS + CR on the induction of inflammation-related proteins were evaluated in lipopolysaccharide (LPS)-stimulated RAW 264...
January 19, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29351548/common-cuckoos-cuculus-canorus-affect-the-bacterial-diversity-of-the-eggshells-of-their-great-reed-warbler-acrocephalus-arundinaceus-hosts
#10
Nikoletta Geltsch, Zoltán Elek, László Manczinger, Csaba Vágvölgyi, Csaba Moskát
The common cuckoo (Cuculus canorus) is an avian brood parasite, laying its eggs in the nests of other bird species, where these hosts incubate the parasitic eggs, feed and rear the nestlings. The appearance of a cuckoo egg in a host nest may change the bacterial community in the nest. This may have consequences on the hatchability of host eggs, even when hosts reject the parasitic egg, typically within six days after parasitism. The present study revealed the bacterial community of cuckoo eggshells and those of the great reed warbler (Acrocephalus arundinaceus), one of the main hosts of cuckoos...
2018: PloS One
https://www.readbyqxmd.com/read/29351311/the-quality-of-voluntary-medical-male-circumcision-done-by-mid-level-workers-in-tshwane-district-south-africa-a-retrospective-analysis
#11
Sanele Ngcobo, Jacqueline Elizabeth Wolvaardt, Martin Bac, Elize Webb
BACKGROUND: Voluntary medical male circumcision (VMMC) reduces the acquisition of human immunodeficiency virus (HIV) in heterosexual men by up to 60%. One HIV infection is averted for every 5 to 15 VMMCs. To conduct VMMCs in large populations, large numbers of trained healthcare professionals are needed. Countries in Sub-Saharan Africa have a high burden of HIV and a shortage of healthcare professionals, creating a healthcare conundrum. To bridge this gap, South Africa launched a new cadre of mid-level medical worker called Clinical Associates (CA)...
2018: PloS One
https://www.readbyqxmd.com/read/29351206/antibody-biomimetic-material-made-of-pyrrole-for-ca-15-3-and-its-application-as-sensing-material-in-ion-selective-electrodes-for-potentiometric-detection
#12
Alexandra R T Santos, Felismina T C Moreira, Luísa A Helguero, M Goreti F Sales
This work reports a very simple approach for creating a synthetic antibody against any protein of interest and its application in potentiometric transduction. The selected protein was Breast Cancer Antigen (CA 15-3), which is implicated in breast cancer disease and used to follow-up breast cancer patients during treatment. The new material with antibody-like properties was obtained by molecular-imprinting technology, prepared by electropolymerizing pyrrol (Py, 5.0 × 10-3 mol/L) around Breast Cancer Antigen (CA 15-3) (100 U/mL) on a fluorine doped tin oxide (FTO) conductive glass support...
January 19, 2018: Biosensors
https://www.readbyqxmd.com/read/29351063/morphological-and-molecular-characterization-of-seuratascaris-numidica-seurat-1917-ascaridida-ascarididae
#13
Hui-Xia Chen, Kuang Zhang, Lu-Ping Zhang, Liang Li
Seuratascaris numidica (Seurat, 1917) is a specialized nematode species parasitizing amphibians only. In the present study, the detailed morphology of this poorly known species was studied using light and scanning electron microscopy based on the newly material collected from Hoplobatrachus chinensis (Osbeck) (Amphibia: Anura) in China. We found that the relative length of intestinal caecum in our male specimens (representing 68.4-71.1% of oesophageal length) is slighter longer than the previously reported data (not over 60...
March 26, 2018: Acta Parasitologica
https://www.readbyqxmd.com/read/29350940/experimental-verification-of-a-jarzynski-related-information-theoretic-equality-by-a-single-trapped-ion
#14
T P Xiong, L L Yan, F Zhou, K Rehan, D F Liang, L Chen, W L Yang, Z H Ma, M Feng, V Vedral
Most nonequilibrium processes in thermodynamics are quantified only by inequalities; however, the Jarzynski relation presents a remarkably simple and general equality relating nonequilibrium quantities with the equilibrium free energy, and this equality holds in both the classical and quantum regimes. We report a single-spin test and confirmation of the Jarzynski relation in the quantum regime using a single ultracold ^{40}Ca^{+} ion trapped in a harmonic potential, based on a general information-theoretic equality for a temporal evolution of the system sandwiched between two projective measurements...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350741/hybrid-nanowires-and-nanoparticles-of-wo3-in-a-carbon-aerogel-for-supercapacitor-applications
#15
Xudong Liu, Guangmin Sheng, Minglong Zhong, Xiuwen Zhou
In the field of electrochemical energy storage, incorporation of metal oxides into porous carbon has attracted significant attention. Since each advantage of nanoparticles and nanowires of metal oxide has been distinguished for supercapacitor applications, a combination of the advantages of both structures together can meet a capacitive synergy. In this study, WO3 nanowires and nanoparticles were first incorporated into a carbon aerogel (CA) simultaneously via a facile and one-pot route. A comparative study on the capacitive properties of this novel hybrid structure and single nanoparticles in CA was conducted...
January 19, 2018: Nanoscale
https://www.readbyqxmd.com/read/29350730/three-dimensional-porous-sic-for-lithium-polysulfide-trapping
#16
Fen Li, Jijun Zhao
One of the key issues in lithium sulfur batteries is the fast capacity fade induced by the lithium polysulfide (LiPS) migration. Hence, a series of three-dimensional (3D) porous SiC materials with active sp2 Si atoms have been designed for lithium polysulfide entrapping in Li-S batteries. The ZGM-SiC-1 and AGM-SiC-3 have been confirmed to be thermodynamically and dynamically stable from the formation energy and phonon dispersion spectrum, meanwhile showing good mechanical properties. The moderate band gaps suggest fast electron transport during the charge-discharge cycles of the Li-S batteries, especially in ZGM-SiC-1...
January 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29350631/competition-and-coexistence-of-polar-and-non-polar-states-in-sr-sub-1-x-sub-ca-sub-x-sub-tio-sub-3-sub-an-investigation-using-pressure-dependent-raman-spectroscopy
#17
Shekhar Tyagi, Gaurav Sharma, Vasant G Sathe
The competition and cooperation between ferroelectric and antiferrodistortive (AFD) instabilities are studied using pressure dependent Raman spectroscopy on polycrystalline powder samples of Sr1-xCaxTiO3(x=0.0, 0.06, 0.25, 0.35). For x=0.0 composition, broad polar mode is detected in the Raman spectra above 6 GPa, while for x=0.06 composition the polar modes appear well above 9 GPa where the AFD modes showed strong suppression. In x=0.25 and 0.35 composition the application of small pressure results in appearance of strong AFD modes suppressing the polar modes...
January 19, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29349811/genetic-analysis-of-interleukin-18-gene-polymorphisms-in-alopecia-areata
#18
Sumeyya Deniz Celik, Omer Ates
BACKGROUND: Alopecia areata (AA), which appears as nonscarring hair shedding on any hair-bearing area, is a common organ-specific autoimmune condition. Cytokines have important roles in the development of AA. Interleukin (IL) 18 is a significant proinflammatory cytokine that was found higher in the patients with AA. We aimed to investigate whether the IL-18 (rs187238 and rs1946518) single nucleotide polymorphisms (SNPs) may be associated with AA and/or clinical outcome of patients with AA in Turkish population...
January 18, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29349475/continuous-splitting-of-aqueous-droplets-at-the-interface-of-co-flowing-immiscible-oil-streams-in-a-microchannel
#19
K S Jayaprakash, A K Sen
We report the continuous splitting of aqueous droplets at the interface between two co-flowing immiscible oil streams in a microchannel. The aqueous droplets initially present in a primary continuous stream (CP1) migrate into a secondary continuous stream (CP2) when the ratio of the non-inertial lift force to the interfacial tension force exceeds a critical value (K. S. Jayaprakash, U. Banerjee and A. K. Sen, Langmuir, 2016, 32, 2136-2143). Here, experiments were performed to understand the droplet splitting phenomenon and demonstrate the splitting of droplets encapsulating microbeads and cells...
January 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29349377/emergency-thoracic-endovascular-aortic-repair-with-celiac-artery-coverage-in-hereditary-hemorrhagic-telangiectasia
#20
Yuji Kawano, Yuji Kanaoka, Nobuhiko Hiraiwa, Daisuke Nakatsuka, Minoru Tabata
Celiac artery (CA) coverage during thoracic endovascular aortic repair has been demonstrated to be a feasible and effective strategy for selected cases. However, there is a potential risk of ischemic complications due to CA coverage in patients with certain types of hereditary hemorrhagic telangiectasia (HHT). Herein, we report a case of thoracoabdominal aortic rupture in a patient with HHT that was successfully treated with emergency thoracic endovascular aortic repair covering the CA preceded by hepatic artery bypass...
June 2017: Journal of Vascular Surgery Cases and Innovative Techniques
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