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FT-IR spectroscopy

Girish G Ariga, Praveen N Naik, Sharanappa T Nandibewoor, Shivamurti A Chimatadar
The goal of this study was to investigate the interactions between meclizine (MEC) and human serum albumin (HSA) under physiological conditions by different spectroscopies and molecular modeling technique. The drug, MEC quenched the intrinsic fluorescence of HSA and the analysis of the results revealed that static quenching mechanism. The binding of MEC quenches the HSA fluorescence; stoichiometry was 1:1 interaction. Thermodynamic quantities were calculated at different temperatures suggested that hydrophobic and van der Waals interaction with HSA-MEC...
October 21, 2016: Journal of Biomolecular Structure & Dynamics
Marzieh Zargaran, Ebrahim Saadat, Rassoul Dinarvand, Mohammad Sharifzadeh, Farid Dorkoosh
Purpose: One of the most nutritional disorders around the world is iron deficiency. A novel iron compound was synthesized by chelating ferrous ions with alanine for prevention and treatment of iron deficiency anemia. Methods: The newly synthesized compound was characterized both qualitatively and quantitatively by Fourier Transform Infrared (FT-IR) spectroscopy. The bioavailability of newly synthesized iron micronutrient was evaluated in four groups of Wistar rats. The group I was a negative control group and the other three groups received three different iron formulations...
September 2016: Advanced Pharmaceutical Bulletin
K Gopinath, S Kumaraguru, K Bhakyaraj, S Mohan, K S Venkatesh, M Esakkirajan, P R Kaleeswarran, S A Naiyf, S Kadaikunnan, M Govindarajan, G Benelli, A Arumugam
The green fabrication of metal nanoparticles using botanical extracts is gaining increasing research attention in nanotechnology, since it does not require high energy inputs or the production of highly toxic chemical byproducts. Here, silver (Ag), gold (Au) and their bimetallic (Ag/Au) nanoparticles (NPs) were green synthesized using the Gloriosa superba aqueous leaf extract. Metal NPs were studied by spectroscopic (UV-visible spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, XRD and EDX) and microscopic (AFM and TEM) analysis...
October 17, 2016: Microbial Pathogenesis
Nicolas Marinval, Pierre Saboural, Oualid Haddad, Murielle Maire, Kevin Bassand, Frederic Geinguenaud, Nadia Djaker, Khadija Ben Akrout, Marc Lamy de la Chapelle, Romain Robert, Olivier Oudar, Erwan Guyot, Christelle Laguillier-Morizot, Angela Sutton, Cedric Chauvierre, Frederic Chaubet, Nathalie Charnaux, Hanna Hlawaty
Herein we investigate the structure/function relationships of fucoidans from Ascophyllum nodosum to analyze their pro-angiogenic effect and cellular uptake in native and glycosaminoglycan-free (GAG-free) human endothelial cells (HUVECs). Fucoidans are marine sulfated polysaccharides, which act as glycosaminoglycans mimetics. We hypothesized that the size and sulfation rate of fucoidans influence their ability to induce pro-angiogenic processes independently of GAGs. We collected two fractions of fucoidans, Low and Medium Molecular Weight Fucoidan (LMWF and MMWF, respectively) by size exclusion chromatography and characterized their composition (sulfate, fucose and uronic acid) by colorimetric measurement and Raman and FT-IR spectroscopy...
October 17, 2016: Marine Drugs
Hui-Hsu Gavin Tsai, Jia-Cheng Hu, Chun-Jui Tan, Yung-Ching Sheng, Chih-Chiang Chiu
The loading of dye sensitizers on a semiconductor is crucial for determining the light harvesting efficiency of dye-sensitizer solar cells (DSSCs). The interfacial properties of dyes adsorbed on TiO2 film such as adsorption configurations and adsorption energy can influence the total amount of dye sensitizers that loads and the stability of a DSSC device. Therefore, it is important to characterize the adsorption properties of dye sensitizers on TiO2 film atomically and electronically to ensure rational structure-based dye design for high-performance DSSCs...
October 20, 2016: Journal of Physical Chemistry. A
Yuanrong Xin, Junji Sakamoto, André J van der Vlies, Urara Hasegawa, Hiroshi Uyama
This data article provides supplementary figures to the research article entitled, "Phase separation approach to a reactive polycarbonate monolith for "click" modifications" (Xin et al., Polymer, 2015, doi:10.1016/j.polymer.2015.04.008). Here, the nitrogen adsorption/desorption isotherms of the prepared porous polycarbonate monolith are shown to classify its inner structure and calculate the specific surface area. The monoliths were modified by using the thiol-ene click chemistry and the olefin metathesis, which was examined by contact angle measurements, FT-IR, solid state (13)C NMR spectroscopy as well as thermogravimetric analysis...
June 2016: Data in Brief
Feng Chen, Liping Liu, Zengguo Bai, Tianhua Zhang, Keke Zhao
Here, 3 fluorinated intermediates of drug were synthesized: (M1), (M2), (M3). Three new anticoagulant rodenticides were designed which were based on 4-hydroxycoumarin or 1,3-indandione, added acute toxicity groups containing fluorine. The structures of synthesized compounds were analyzed and proved by FT-IR spectroscopy and (1)H nuclear magnetic resonance ((1)H-NMR). The compounds were also evaluated for their anticoagulant and acute biologic activity. In addition, both the acute orally toxicity and the feeding indexes of R1 and R2 were tested...
October 19, 2016: Bioengineered
M Josick Comarmond, Robin Steudtner, Madlen Stockmann, Karsten Heim, Katharina Müller, Vinzenz Brendler, Timothy E Payne, Harald Foerstendorf
The ternary system containing aqueous U(VI), aqueous phosphate and solid SiO2 was comprehensively investigated using a batch sorption technique, in situ attenuated total reflection Fourier-transform infrared (ATR FT-IR) spectroscopy, time-resolved luminescence spectroscopy (TRLS), and surface complexation modeling (SCM). The batch sorption studies on silica gel (10 g/L) in the pH range 2.5 to 5 showed no significant increase in U(VI) uptake in the presence of phosphate at equimolar concentration of 20 μM, but significant increase in U(VI) uptake was observed for higher phosphate concentrations...
October 18, 2016: Environmental Science & Technology
Alondra Escudero-Castellanos, Blanca E Ocampo-García, Ma Victoria Domínguez-García, Jaime Flores-Estrada, Miriam V Flores-Merino
Hydrogels are suitable materials to promote cell proliferation and tissue support because of their hydrophilic nature, porous structure and sticky properties. However, hydrogel synthesis involves the addition of additives that can increase the risk of inducing cytotoxicity. Sterilization is a critical process for hydrogel clinical use as a proper scaffold for tissue engineering. In this study, poly(ethylene glycol) (PEG), poly(ethylene glycol)-chitosan (PEG-CH) and multi-arm PEG hydrogels were synthesized by free radical polymerization and sterilized by gamma irradiation or disinfected using 70 % ethanol...
December 2016: Journal of Materials Science. Materials in Medicine
Helen K White, Chloe H Wang, Patrick L Williams, David M Findley, Alana M Thurston, Rachel L Simister, Christoph Aeppli, Robert K Nelson, Christopher M Reddy
To investigate the long-term weathering of oil from the Deepwater Horizon (DWH) incident, oil-soaked sand patties were collected from Gulf of Mexico beaches from Florida to Alabama over a three-year period from 2012 to 2014. Analysis of oil residues by gas chromatography with flame ionization detection (GC-FID), thin-layer chromatography with flame ionization detection (TLC-FID), and Fourier transform infrared spectroscopy (FT-IR) indicated uniformity in their chemical composition. Some variability within and between samples was observed, arising from differences in exposure to light and water, which increase the amount of weathering...
October 14, 2016: Marine Pollution Bulletin
Jong Won Shin, Dong Won Lee, Dae-Woong Kim, Dohyun Moon
The title compound, [CuCl2(C10H16N2O)], has been synthesized and characterized by synchrotron single-crystal X-ray diffraction and FT-IR spectroscopy. The 2-methyl-2-[(pyridin-2-ylmeth-yl)amino]-propan-1-ol (mpmapOH) ligand, including pyridine, amine and hy-droxy groups, was synthesized by the reaction of 2-amino-2-methyl-propan-1-ol with pyridine-2-carbaldehyde and was characterized by NMR spectroscopy. In its Cu(II) complex, the metal ion has a distorted square-pyramidal coordination geometry with two N and one O atom of the mpmapOH ligand and one chloride anion in the equatorial plane, and the second chloride in an axial position...
October 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
Zain-Ul-Abdin, Li Wang, Haojie Yu, Muhammad Saleem, Muhammad Akram, Hamad Khalid, Nasir M Abbasi, Xianpeng Yang
Ferrocene-based derivatives are widely used as ferrocene-based burning rate catalysts (BRCs) for ammonium perchlorate (AP)-based propellant. However, in long storage, small ferrocene-based derivatives migrate to the surface of the propellant, which results in changes in the designed burning parameters and finally causes unstable combustion. To retard the migration of ferrocene-based BRCs in the propellant and to increase the combustion of the solid propellant, zero to third generation ethylene diamine-based ferrocene terminated dendrimers (0G, 1G, 2G and 3G) were synthesized...
October 4, 2016: Journal of Colloid and Interface Science
Maciej Zalas, Agata Wawrzyńczak, Paulina Półrolniczak, Jan Sobuś, Grzegorz Schroeder, Stefan Jurga, Elena Selli
A series of 14 mesoporous titania materials has been synthesized using the simple alcothermal template-free method and various alcohols, such as methanol, propanols and butanols, as solvents. All materials were characterized by both wide and small angle XRD, which exhibited the anatase phase with short-range ordered mesoporous structure that is still forming during post synthetic temperature treatment in most of the investigated materials. Nitrogen adsorption-desorption isotherms confirmed the mesoporous structure with surface area ranging from 241 to 383 m2g- 1 and pore volumes from 0...
2016: PloS One
Kristin Mühldorfer, Gudrun Wibbelt, Claudia A Szentiks, Dominik Fischer, Holger C Scholz, Michael Zschöck, Tobias Eisenberg
AIMS: Novel cases of Brucella infections in frogs are discussed together with results of published reports to extend our current knowledge on 'atypical' brucellae isolated from amphibians and discuss challenges we face on this extraordinary emerging group of pathogens. METHODS AND RESULTS: Since our first description, additional 14 isolates from 4 different frog species were collected. Novel isolates and a subset of Brucella isolates previously cultured from African bullfrogs were characterized by MALDI-TOF mass spectrometry, Fourier transform-infrared spectroscopy and broth microdilution susceptibility testing...
October 14, 2016: Journal of Applied Microbiology
Janifer Raj Xavier, Karna Venkata Ramana
Fructooligosaccharides (FOS) and levan attract much attention due to a wide range of applications in food technology and pharmaceutical and cosmetic industry. Bacillus licheniformis ANT 179, isolated from Antarctica soil, produced levansucrase and levan in a medium containing sucrose as carbon substrate. In this study, characterization of levansucrase and production of short-chain FOS and levan were investigated. Temperature and pH optimum of the enzyme were found to be 60 °C and pH 6.0, respectively. The optimization of fermentation conditions for levan production using sugarcane juice by response surface methodology (RSM) was carried out...
October 12, 2016: Applied Biochemistry and Biotechnology
N A Abdelwahab, N Shukry, S F El-Kalyoubi
Sugarcane bagasse (B), a low cost agricultural waste, was modified via esterification and coating with polyacrylonitrile (PAN) and evaluated as a hydrophobic sorbent for diesel oil removal from artificial seawater. Esterification was carried out using stearic acid (SA) and CaO, the reaction conditions including B:SA mass ratio, CaO concentration, reaction time and temperature were optimized. Additional hydrophobicity was achieved by coating the esterified bagasse (EB) with a hydrophobic polymer (PAN). The advantages of hydrophobicity were clearly addressed by reduction of water absorption capacity (WAC) and increased oil adsorption capacity (OAC)...
October 12, 2016: Environmental Technology
Anna Kamecka, Kinga Suwińska, Andrzej Kapturkiewicz
Two series of cationic heteroleptic osmium(ii) complexes with a coordinated CO molecule, a chloride Cl(-) or hydride H(-) anion, two monodentate triphenylphosphine (tpp) ligands and one bidentate α-dimine (N(∧)N) ligand were prepared from an OsCl2(CO)2(tpp)2 precursor. The investigated complexes, available in the form of PF6(-) salts, have been identified by means of FT-IR, (1)H and (31)P NMR spectroscopy and X-ray diffraction studies. Their photophysical properties have been investigated in dichloromethane solutions at room temperature and 1 : 1 ethanol-methanol matrices at 77 K...
October 11, 2016: Physical Chemistry Chemical Physics: PCCP
Joseph Hufton, John H Harding, Maria E Romero-González
Bacterial extra polymeric substances (EPS) have been associated with the extracellular precipitation of uranium. Here we report findings on the biomineralisation of uranium, with extracellular DNA (eDNA) used as a model biomolecule representative of EPS. The complexation and precipitation of eDNA with uranium were investigated as a function of pH, ionic strength and varying concentrations of reactants. The role of phosphate moieties in the biomineralisation mechanism was studied by enzymatically releasing phosphate (ePO4) from eDNA compared to abiotic phosphate (aPO4)...
October 11, 2016: Physical Chemistry Chemical Physics: PCCP
Zhiyong Xie, Juncui Xu, Fazhi Xie, Shiquan Xiong
A reduced graphene oxide (rGO)/Fe3O4 composites modified screen-printed carbon electrode (SPCE) was used to determinate As(III) in a HAc-NaAc buffer solution. The rGO/Fe3O4 composites were prepared by a simple and one-pot synthesis method, and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), FT-IR and Raman spectra. The electrochemical behaviors of the composite electrode were characterized by cycle voltammetry and electrochemical impedance spectroscopy. The experimental parameters, such as supporting electrolyte, solution pH, deposition potential, deposition time were optimized, respectively...
2016: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
Faheem Ullah Khan, Yongmei Chen, Naeem Ullah Khan, Zia Ul Haq Khan, Arif Ullah Khan, Aftab Ahmad, Kamran Tahir, Lei Wang, Muhammad Riaz Khan, Pingyu Wan
In this study, a simple and environmental friendly method was developed for the synthesis of silver nanoparticles (Ag-NPs) using Dimocarpus longan seed extract as a source of reducing and stabilizing agent. The appearance of a surface plasmon resonance peak at 432nm confirmed the synthesis of silver nanoparticles (UV-visible spectroscopy). The biosynthesized Ag-NPs were face centered cubic structures (XRD) with an approximate particle size of 40nm (TEM). Optimization study revealed that 10mL of plant extract (2mM AgNO3) at 180min of incubation resulted the optimum product synthesis...
October 3, 2016: Journal of Photochemistry and Photobiology. B, Biology
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