11 research outputs found
Copolymers of 4-Fluoro Benzyl Methacrylate and 2-(Dimethylamino)ethyl Methacrylate: Reactivity Ratios, Thermal Properties, Biologial Activity, and Semi-Conducting Properties
No full textA new methacrylate monomer 4-fluorobenzyl methacrylate (FBM) was synthesized and its radical copolymerization with 2-(dimethylamino)ethyl methacrylate (DMAEMA) was studied in 1,4-dioxane solution at 65A degrees C using 2,2'-azobisisobutyronitrile as an initiator. The synthesized monomer and copolymers were characterized by FTIR, H-1 and C-13 NMR spectroscopy. The analysis of reactivity ratios revealed that FBM is less reactive than DMAEMA, and copolymers formed are statistically in nature. Thermogravimetric analysis of the polymers reveals that the thermal stability of the copolymers increases with an increasing in the mole fraction of FBM in the copolymers. Glass transition temperatures of the copolymers decreased with an increasing in the mole fraction of FBM in the copolymers. The polymers exhibit the semiconducting behavior, and the electrical conductivity increases with increasing both of the temperature and DMAEMA content in copolymer.Afyon Kocatepe University Research Fund [13-FENBIL-28]Author wish to thank the financial support provided by the Afyon Kocatepe University Research Fund (Project no. 13-FENBIL-28)
Determination of Bacterial Diversity of Propolis Microbiota
No full textPropolis is a natural resinous mixture produced by the excretions of honeybees. PCR amplification of the 16S rRNA gene region was achieved using DNA of pre-enriched propolis samples collected from Apis mellifera production hives (n=37) in Eastern Turkiye (Bingol and its regions). Next-generation sequencing and metabarcoding techniques were used to identify bacterial communities in propolis samples. Firmicutes dominated the phylum structure, with Proteobacteria, Actinobacteria, Tenericutes, and Spirochaetes following. The top three bacterial families were Bacillaceae, Enterobacteriaceae, and Enterococcaceae. Bacillus (dominantly B. badius and B. thermolactis at the species level) was recognized at the genus level, followed by Enterococcus and Clostridium sensu stricto. Our study comprehensively identified the bacterial diversity of propolis samples. Further investigations targeting to enlighten the microbiota of propolis and its potential application fields are required to gain better insight into ecological, nutritional, and medicinal perspectives.BioProject [PRJNA780802]The authors would like to thank Mehmet Ali Aba for his assistance in collecting some propolis samples. The bacterial 16S rRNA gene amplicon sequencing data generated in this study using NGS was submitted to NCBI Sequence Read Archive (SRA) database with BioProject accession number PRJNA780802. All authors confirm that they have no conflicts of interest with respect to the work described in this manuscript. Ethical Approval: This article does not contain any studies with human participants or animals performed by any of the authors
Surface plasmon resonance aptasensor for soluble ICAM-1 protein in blood samples
No full textIntercellular Adhesion Molecule-1 (ICAM-1) is considered to be a cancer biomarker in the assessment of metastatic potential in patients and an early indicator of atherosclerosis. A labelless biosensor based on the surface plasmon resonance (SPR) signal from the specific affinity interaction of an aptamer and a soluble ICAM-1 protein was developed for blood samples. The developed aptasensor provided real-time information on the concentration of the ICAM-1 protein in blood when integrated to a purification step based on a magnetic pull-down separation. The SPR aptasensor was highly specific with a limit of detection of 1.4/0.2 ng ml−1, which was achieved through aptamer-functionalized silica-coated magnetic nanoparticles
Erratum notice
No full textCorrigendum: Marija Mihajlović, Marija Stanojević, Mirjana Stojanović, Jelena
Petrović, Jelena Milojković, Marija Petrović, Zorica Lopičić. TO WHAT EXTENT
DO SOFT MECHANICAL ACTIVATION AND PROCESS PARAMETERS INCREASE THE EFFICIENCY
OF DIFFERENT ZEOLITE/PHOSPHATE ROCK FERTILIZER MIXTURES?. Chem. Ind. Chem.
Eng. Q. 23(1) (2017) 1−9. DOI: 10.2298/CICEQ150622047M age 2, left column,
4th line from above should read: natural zeolites with nutrient elements
such as NH4 + or K+ Page 2, left column, 16th line from above should read:
However, some authors noted that the particle size Page 7, 1st line from
below should be replaced with the following lines: Figure 6. PCA score plots
obtained on the whole data set with samples labeled in accordance with: a)
the zeolite/PR ratio (where 5 designates 5:1, 10 designates 10:1, and 15
designates 15:1 ratio) and b) the duration of mixing time (24, 48 and 72 h).
Correlation loading plots of the PCA model for :c) the MACp/PR mixtures and
d) the MANH4−Cp/PR mixtures. Corrigendum: Fatih Ilhan, Kaan Yetilmezsoy,
Harun Akif Kabuk, Kubra Ulucan, Tamer Coskun, Busra Akoglu. EVALUATION OF
OPERATIONAL PARAMETERS AND ITS RELATION ON THE STOICHIOMETRY OF FENTON'S
OXIDATION TO TEXTILE WASTEWATER. Chem. Ind. Chem. Eng. Q. 23(1) (2017)
11−19. DOI: 10.2298/CICEQ150907048I The editorial team at the Chemical
Industry and Chemical Engineering Quarterly takes many measures to ensure
accuracy. However, we have been alerted to an unfortunate error in the
footnote of the paper of Ilhan et al., Chem. Ind. Chem. Eng. Q. 23(1) (2017)
11−19 located on page 11, where the e-mail addresses of the corresponding
author should be [email protected] and [email protected] (K.
Yetilmezsoy). Apologies are offered to readers of the Chem. Ind. Chem. Eng.
Q. that this abuse was not detected during the editing process. Link to the corrected article 10.2298/CICEQ150622047M
Link to the corrected article 10.2298/CICEQ150907048I</u
Experimental Investigation of the Wind Turbine Blade Root Flow
No full textSeveral methods from experimental to analytical are used to investigate the aerodynamics of a horizontal axis wind turbine. To understand 3D and rotational effects at the root region of a wind turbine blade, correct modeling of the flow field is essential. Aerodynamic models need to be validated by accurate experimental data. In this paper, the experimental results of the aerodynamic behavior of a model wind turbine blade, by focusing on the blade root flow, are presented. The measurements are performed on a 2 bladed rotor having 1 m radius by means of Stereo Particle Image Velocimetry in a wind tunnel. The spanwise velocity distribution on the suction side of the blade is determined in detail. It shows a complex flow pattern in the root region and positive spanwise flow component apparent at radial stations beyond r/R=0.4 at the leading edge (z/c=0.25).Aerodynamics, Wind Energy & PropulsionAerospace Engineerin
Surface Plasmon Resonance Aptasensor for Soluble Icam-1 Protein in Blood Samples
No full textKavruk, Murat/0000-0001-5331-7253; Dursun, Ali Dogan/0000-0001-9056-0025; Tuna, Bilge Guvenc/0000-0003-1348-1336; Yilmaz, Bayram/0000-0002-2674-6535; Özalp, Veli Cengiz/0000-0002-7659-5990; Yilmaz, Mahmut/0000-0001-5793-0805Intercellular Adhesion Molecule-1 (ICAM-1) is considered to be a cancer biomarker in the assessment of metastatic potential in patients and an early indicator of atherosclerosis. A labelless biosensor based on the surface plasmon resonance (SPR) signal from the specific affinity interaction of an aptamer and a soluble ICAM-1 protein was developed for blood samples. The developed aptasensor provided real-time information on the concentration of the ICAM-1 protein in blood when integrated to a purification step based on a magnetic pull-down separation. The SPR aptasensor was highly specific with a limit of detection of 1.4/0.2 ng ml(-1), which was achieved through aptamer-functionalized silica-coated magnetic nanoparticles.Scientific and Technological Research Council of Turkey (TUBITAK) [115S233]This work was partly supported by a project grant number 115S233 from The Scientific and Technological Research Council of Turkey (TUBITAK)
Experimental and Numerical Quantification of Radial Flow in the Root Region of a HAWT
No full textThis paper explores the evolution of radial flow in a Horizontal Axis Wind Turbine (HAWT) blade root region. The radial flow is analyzed in the potential flow and viscous flow regions. An experiment carried out by means of stereo Particle Image Velocimetry to measure the velocity field produced by a HAWT blade. While the radial flow in the potential flow region was obtained from the measurements, the radial flow in the boundary layer was derived from CFD. By the direct observations obtained from the experiment, an insight is gained about the nature of the radial flow in the suction side of the blade as well as in the near wake. An outboard radial flow motion is observed in the root region. This tendency of the flow changes dramatically when it reaches the maximum chord position of the blade, where the radial flow moves inboard. The trace of the viscous region due to merging of the boundary layers and trailing vorticity are observed clearly in the radial velocity and vorticity distributions at 135º azimuth angle of the blade. In the viscous flow region the radial flow is more pronounced than in the potential flow region. The performed CFD simulations are able to predict the vortex formation in the maximum chord region and its interaction with the nacelle.Aerodynamics, Wind Energy & PropulsionAerospace Engineerin
Effects of geometry and tip speed ratio on the HAWT blade's root flow
No full textIn this study, the effect of the parameters playing a role in the root flow behavior of HAWT are only partly understood. To better reveal the root flow properties, this study presents the progression of HAWT blade root flow at two different blade geometries and at two different tip speed ratios. The effects of the geometry and the tip speed ratio on the root flow behavior and on the evolution of the root flow features are investigated. This study aims to answer the following questions: (i) What are the effects of the blade geometry and tip speed ratio on the root flow behavior? (ii) How are the blade wake and the root vortex evolution affected by the change of these parameters? The analysis of the velocity fields shows that the radial flow behavior changes with different blade geometries but a remarkable difference in the radial flow behavior is not observed with the change of tip speed ratio. The formation of the wake is different at three test cases because of different loading that the blades are encountered. From the circulation distribution along the blades, while a strong root vortex can be observed in Blade 1, the bound vorticity along Blade 2 builds up gradually when moving outboard, and do not show a trace of a strong root vortex.Aerodynamics, Wind Energy & PropulsionAerospace Engineerin
Author Correction: A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic.
No full textCorrection to: Nature Human Behaviour https://doi.org/10.1038/s41562-021-01173-x, published online 2 August 2021.In the version of this article initially published, the following authors were omitted from the author list and the Author contributionssection for “investigation” and “writing and editing”: Nandor Hajdu (Institute of Psychology, ELTE Eötvös Loránd University, Budapest,Hungary), Jordane Boudesseul (Facultad de Psicología, Instituto de Investigación Científica, Universidad de Lima, Lima, Perú), RafałMuda (Faculty of Economics, Maria Curie-Sklodowska University, Lublin, Poland) and Sandersan Onie (Black Dog Institute, UNSWSydney, Sydney, Australia & Emotional Health for All Foundation, Jakarta, Indonesia). In addition, Saeideh FatahModares’ name wasoriginally misspelled as Saiedeh FatahModarres in the author list. Further, affiliations have been corrected for Maria Terskova (NationalResearch University Higher School of Economics, Moscow, Russia), Susana Ruiz Fernandez (FOM University of Applied Sciences,Essen; Leibniz-Institut fur Wissensmedien, Tubingen, and LEAD Research Network, Eberhard Karls University, Tubingen, Germany),Hendrik Godbersen (FOM University of Applied Sciences, Essen, Germany), Gulnaz Anjum (Department of Psychology, Simon FraserUniversity, Burnaby, Canada, and Department of Economics & Social Sciences, Institute of Business Administration, Karachi, Pakistan).<br/
Side chain to main chain hydrogen bonds stabilize a polyglutamine helix in a transcription factor
No full textPolyglutamine (polyQ) tracts are regions of low sequence complexity frequently found in transcription factors. Tract length often correlates with transcriptional activity and expansion beyond specific thresholds in certain human proteins is the cause of polyQ disorders. To study the structural basis of the association between tract length, transcriptional activity and disease, we addressed how the conformation of the polyQ tract of the androgen receptor, associated with spinobulbar muscular atrophy (SBMA), depends on its length. Here we report that this sequence folds into a helical structure stabilized by unconventional hydrogen bonds between glutamine side chains and main chain carbonyl groups, and that its helicity directly correlates with tract length. These unusual hydrogen bonds are bifurcate with the conventional hydrogen bonds stabilizing α-helices. Our findings suggest a plausible rationale for the association between polyQ tract length and androgen receptor transcriptional activity and have implications for establishing the mechanistic basis of SBMA. © 2019, The Author(s).We thank Sandro Bottaro, Ernest Giralt, Gerhard Hummer, Víctor Muñoz, and Huan-Xiang Zhou for helpful discussions and the ICTS NMR facility, managed by the scientific and technological centers of the University of Barcelona (CCiT UB), for their help in NMR. K.L.-L. and M.B.A.K. acknowledge funding from the Lundbeck Foundation and the BRAINSTRUC initiative. B.T. and J.A. acknowledge, respectively, FPI and Juan de la Cierva fellowships from MINECO. R.P and I.C.F. acknowledge funding from the European Commission (iNEXT, 653706). M.O. acknowledges the Spanish Ministry of Science (BFU2014-61670-EXP), the Catalan SGR, the Instituto Nacional de Bioinformática, the Biomolecular and Bioinformatics Resources Platform (ISCIII PT 13/0001/0030) co-funded by the Fondo Europeo de Desarrollo Regional (FEDER). R.C. acknowledges funding from MINECO (CTQ2016-78636-P). X.S. acknowledges funding from AGAUR (2017 SGR 324), Marató TV3 (102030), MINECO (BIO2012-31043 and BIO2015-70092-R), and the European Research Council (CONCERT, contract number 648201). IRB Barcelona is the recipient of a Severo Ochoa Award of Excellence from MINECO (Government of Spain)Peer reviewe
