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Simon T Thompson, H Henry Lamb, Bernard Delley, Stefan Franzen
Tetraamminepalladium(II) perrhenate, a double complex salt, has significant utility in PdRe catalyst preparation; however, the vibrational spectra of this readily prepared compound have not been described in the literature. Herein, we present the infrared (IR) and Raman spectra of tetraamminepalladium(II) perrhenate and several related compounds. The experimental spectra are complemented by an analysis of normal vibrational modes that compares the experimentally obtained spectra with spectra calculated using DFT (DMol(3))...
October 17, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Vladimir Ivanovski, Thomas G Mayerhöfer, Antje Kriltz, Jürgen Popp
Several samples of flat soda-lime silicate glass were investigated by the Infrared Attenuated Total Reflection (IR-ATR) spectroscopy technique. The specular reflectance spectra together with the results of the performed dispersion analysis and the generated reflectance spectra, using Fresnel equations, suggest that the samples are isotropic. In contrast, spectra recorded by the ATR technique suggest an anisotropic structure on the surface of the specimen different from that in the bulk. This is established through differences in the s- and p-polarized IR-ATR spectra, which cannot be simply transformed into one another employing Fresnel formula for an isotropic case...
October 17, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Ming Guo, Xiaowang Lu, Yan Wang, Peter E Brodelius
The binding properties of pentacyclic triterpenoid isomeric drugs, i.e. ursolic acid (UA) and oleanolic acid (OA), to bovine lactoferrin (BLF) have been studied by molecule modeling, fluorescence spectroscopy, UV-visible absorbance spectroscopy and infrared spectroscopy (IR). Molecular docking, performed to reveal the possible binding mode or mechanism, suggested that hydrophobic interaction and hydrogen bonding play important roles to stabilize the complex. The results of spectroscopic measurements showed that the two isomeric drugs both strongly quenched the intrinsic fluorescence of BLF through a static quenching procedure although some differences between UA and OA binding strength and non-radiation energy transfer occurred within the molecules...
October 18, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
W-J Guan, G-J Yang
OBJECTIVE: We investigated the significance of a change in retinol binding protein (RBP4) levels in the plasma of patients with coronary heart disease complicated with hyperlipidemia. PATIENTS AND METHODS: 66 cases of coronary heart disease (CHD) patients in Cardiovascular Department of our Hospital from December 2014 to December 2015 were selected. Based on the diagnostic criteria of hyperinsulinemia, patients were divided into a CHD Group with 35 cases and a CHD-Hyperinsulinemia Group (CHD-H group) with 31 cases...
October 2016: European Review for Medical and Pharmacological Sciences
Nuria A Illán-Cabeza, Sonia B Jiménez-Pulido, Francisco Hueso-Ureña, Tomás Peña-Ruiz, Miguel Quirós-Olozábal, Miguel N Moreno-Carretero
2,4-Bis(1,3,7-trimethyl-pteridine-2,4(1H,3H)-dione-6-yl)-2,3-dihydro-2-methyl-1H-1,5-benzodiazepine (DLMBZD) has been prepared and its molecular and crystal structures have been determined from spectral and XRD data. The benzodiazepine ligand was reacted with zinc(ii), cadmium(ii) and mercury(ii) chloride, bromide and iodide to give complexes with general formula [M(DLMBZD)X2]. The complexes have been synthesized and characterized by IR, NMR and elemental analysis. The structure of seven complexes has been obtained by single crystal X-ray diffraction...
October 24, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Mauro Zaninelli, Veronica Redaelli, Erica Tirloni, Cristian Bernardi, Vittorio Dell'Orto, Giovanni Savoini
The development of a monitoring system to identify the presence of laying hens, in a closed room of a free-range commercial organic egg production farm, was the aim of this study. This monitoring system was based on the infrared (IR) technology and had, as final target, a possible reduction of atmospheric ammonia levels and bacterial load. Tests were carried out for three weeks and involved 7 ISA (Institut de Sélection Animale) brown laying hens. The first 5 days was used to set up the detection sensor, while the other 15 days were used to evaluate the accuracy of the resulting monitoring system, in terms of sensitivity and specificity...
October 21, 2016: Sensors
Antonia G Zogka, Abdelwahid Mellouki, Manolis N Romanias, Yuri Bedjanian, Mahmoud Idir, Benoit Grosselin, Veronique Daele
The rate coefficients for the reactions of OH and Cl with 1-methoxy 2-propyl acetate (MPA) in the gas phase were measured using absolute and relative methods. The kinetic study on the OH-reaction was conducted in the temperature (263-373) K and pressure (1-760) Torr ranges using the pulsed laser photolysis-laser induced fluorescence technique, a low pressure fast flow tube reactor-quadrupole mass spectrometer and an atmospheric simulation chamber-GC/FID. The derived Arrhenius expression is kMPA+OH(T)=(2.01±0...
October 24, 2016: Journal of Physical Chemistry. A
Akio Hayashi, Hiromi Ota, Xavier López, Norihito Hiyoshi, Nao Tsunoji, Tsuneji Sano, Masahiro Sadakane
Dipotassium cation (K(+))-encapsulated Preyssler-type phosphotungstate, [P5W30O110K2](13-), was prepared by heating monobismuth (Bi(3+))-encapsulated Preyssler-type phosphotungstate, [P5W30O110Bi(H2O)](12-), in acetate buffer in the presence of an excess amount of potassium cations. Characterization of the isolated potassium salt, K13[P5W30O110K2] (1a), and its acid form, H13[P5W30O110K2] (1b), by single crystal X-ray structure analysis, (31)P and (183)W nuclear magnetic resonance (NMR), Fourier transform infrared (FT-IR) spectroscopy, cyclic voltammetry (CV), high-resolution electrospray ionization mass spectroscopy (HR-ESI-MS), and elemental analysis revealed that two potassium cations are encapsulated in the Preyssler-type phosphotungstate molecule with formal D5h symmetry, which is the first example of a Preyssler-type compound with two encapsulated cations...
October 24, 2016: Inorganic Chemistry
Hong-Xu Na, Pei-Yu Yang, Zheng Yin, Yun-Hong Wang, Li-Xian Chang, Rui Si, Mohamedally Kurmoo, Ming-Hua Zeng
The square-planar monomer NiL2 (Ni1 ), L=2-ethoxy-6-(N-methyl-iminomethyl)phenolate, reacts with M(H2 O)6 (ClO4 )2 , M=Ni or Co, to form heptanuclear disks [Cox Ni7-x (OH)6 (L)6 ](ClO4 )2 ⋅2 CH3 CN (Cox Ni7-x , x=0-7) and the co-crystal [Cox Ni7-x (OH)6 L6 ][NiL2 ](ClO4 )2 ⋅2 CH3 CN (Cox Ni7-x -Ni1 ) under ambient conditions. It has proved possible to explore the bottom-up assembly process of Cox Ni7-x and Cox Ni7-x -Ni1 in real time. The final products have been characterized by thermogravimetric analysis, IR, elemental analysis, ICP-MS, and single-crystal X-ray diffraction...
October 24, 2016: Chemistry: a European Journal
Shengnan Yin, Yiran Xia, Qi Jia, Zhao-Sheng Hou, Na Zhang
This study describes the preparation and properties of a novel aliphatic cost-effective segmented polyurethanes (SPUs) based on poly(ether ester) (poly-(ε-caprolactone-co-L-lactide)-poly(ethylene glycol)-poly-(ε-caprolactone-co-L- lactide), PECLA) and uniform-size diurethane diisocyanates (HDI-BDO-HDI). PECLA was synthesized via bulk ring-opening polymerization with poly(ethylene glycol) (PEG) as an initiator and ε-caprolactone, L-lactide as monomers. By chain extension of PECLA diol with HDI-BDO-HDI, three SPUs with different hydrophilic segments content and hard segments content were obtained...
October 23, 2016: Journal of Biomaterials Science. Polymer Edition
Eun-Ah Kim, Ha Kyung Lee, Jung Hyun Choi
This study investigated the effects of the freezing and thawing that accompany the warming process on the composition of the soil organic matter in the dissolved and colloidal fractions. Temperate soil samples were incubated in a refrigerator at 2 °C for 4 weeks and compared with those frozen at -20 °C in the second week followed by thawing at 2 °C to study a freeze-thaw effect with minimal effect from the thawing temperature. The freeze-thaw group was compared with those incubated at 25 °C in the last week to investigate a warming effect after thawing...
October 24, 2016: Environmental Science and Pollution Research International
Kristin J Suhr, Lyndon D Bastatas, Yulong Shen, Lauren A Mitchell, Gary A Frazier, David W Taylor, Jason D Slinker, Bradley J Holliday
A series of seven cationic bis-cyclometalated iridium(iii) complexes of the form [(C^N)2(N^N)Ir][PF6] has been designed in order to examine the effect of bulky, hydrophobic phenyl substituents on the structure-property relationship of these ionic transition metal complexes (iTMCs) in light-emitting electrochemical cells (LEECs). Capping phenyl substituents on the cyclometalating and ancillary ligands allows for individual tuning of the HOMO and LUMO energy levels, respectively, yielding an emission range from yellow to red...
October 24, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Reda Boulmène, Muthuramalingam Prakash, Majdi Hochlaf
Ab initio and DFT studies on CO2 interacting with different tautomers and isomers of triazole (TZ) are carried out to understand the adsorption mechanism and their mutual preferential sites. We used post Hartree-Fock methods (MP2, CCSD(T), and CCSD(T)-F12) and various DFTs (PBE, PBE0, M05-2X, and M11) with and without considering the dispersion correction for comparison. We determined hence the equilibrium structures, vibrational frequencies and binding energies of TZ-CO2 clusters and mapped their potential energy surfaces along the intermonomer coordinates...
October 24, 2016: Physical Chemistry Chemical Physics: PCCP
Richard A Anderson, Zhiwei Zhan, Rencai Luo, Xiuhua Guo, Qingqing Guo, Jin Zhou, Jiang Kong, Paul A Davis, Barbara J Stoecker
Cinnamon ( ròu guì) has in vitro insulin potentiating activity, and proanthocyanidins from cinnamon prevent in vitro formation of advanced glycation end products. Some human studies were equivocal, but several have shown beneficial effects of cinnamon supplementation on circulating glucose, lipids, and/or insulin. This placebo-controlled double-blind trial tested the effects of a dried water extract of cinnamon (Cinnamomum cassia) on circulating glucose, lipids, insulin, and insulin resistance. Men and women from Beijing and Dalian, China, were invited to participate if they had fasting serum glucose >6...
October 2016: Journal of Traditional and Complementary Medicine
Kathleen A Griffith, Seon-Yoon Chung, Shijun Zhu, Alice S Ryan
OBJECTIVE: After chemotherapy for breast cancer, Black women gain more weight and have an increased mortality rate compared with White women. Our study objective was to compare biomarkers associated with obesity in Black women with and without a history of breast cancer. DESIGN: Case-control. SETTING: Academic/federal institution. PARTICIPANTS: Black women with a history of breast cancer (cases) and age-matched controls...
October 20, 2016: Ethnicity & Disease
Liu Tang, Yicun Chen, Zebin Jiang, Shuping Zhong, Weizhou Chen, Fuchun Zheng, Ganggang Shi
Purification, preliminary characterization and bioactivity of polysaccharides from Grateloupia livida (GL) were investigated. Three water-soluble sulfated polysaccharide fractions (GLP-1, GLP-2 and GLP-3) were isolated and purified from the edible and medicinal red seaweed, Grateloupia livida (Harv.) Yamada by DEAE Sepharose CL-6B and Sephadex G-100 column chromatography, and chemical characterization was performed by HPGPC, GC-MS, FT-IR and SEM. In addition, anticoagulant activities were determined by activated partial thromboplastin time (APTT), thrombin time (TT) and prothrombin time (PT) using normal human plasma in vitro...
October 20, 2016: International Journal of Biological Macromolecules
Gheorghe Fundueanu, Marieta Constantin, Sanda Bucătariu, Iuliana Stoica
Double hydrophilic thermo-responsive pullulan-g-poly(N-isopropylacrylamide) (P-g-pNIPAM) copolymers with two different molecular weight of thermosensitive grafts were synthesized and used for preparation of indomethacin-loaded nanoparticles by dialysis and nanoprecipitation method. The polymers form aggregates in aqueous solution at a concentration of 10g/L, above their critical aggregation concentration (3.36g/L) and below the lower critical solution temperature (LCST). After indomethacin loading, nanoparticles with compact and uniform structure were formed below the LCST...
October 20, 2016: International Journal of Biological Macromolecules
M S Rahnama'i, B T Biallosterski, Ph E V Van Kerrebroeck, G A van Koeveringe, J I Gillespie, S G de Wachter
AIM: Increased afferent fibre activity contributes to pathological conditions such as the overactive bladder syndrome. Nerve fibres running near the urothelium are considered to be afferent as no efferent system has yet been described. The aim of this study was to identify sub-types of afferent nerve fibres in the mouse bladder wall based on morphological criteria and analyse regional differences. MATERIALS AND METHODS: 27 bladders of six month old C57BL/6 mice were removed and tissues were processed for immunohistochemistry...
October 20, 2016: Journal of Chemical Neuroanatomy
Courtney L Huff, Rachel L Morano, James P Herman, Bryan K Yamamoto, Gary A Gudelsky
3,4-Methylenedioxy-methamphetamine (MDMA) is a unique psychostimulant that continues to be a popular drug of abuse. It has been well documented that MDMA reduces markers of 5-HT axon terminals in rodents, as well as humans. A loss of parvalbumin-immunoreactive (IR) interneurons in the hippocampus following MDMA treatment has only been documented recently. In the present study, we tested the hypothesis that MDMA reduces glutamic acid decarboxylase (GAD) 67-IR, another biochemical marker of GABA neurons, in the hippocampus and that this reduction in GAD67-IR neurons and an accompanying increase in seizure susceptibility involve glutamate receptor activation...
October 20, 2016: Neurotoxicology
Mohammad Yaser Masoomi, Ali Morsali, Peter C Junk, Jun Wang
Two new isostructural coordination polymers, [Zn3(Oba)4][Me2NH2)2]·6DMF·3H2O (1) and [Cd3(Oba)4][Me2NH2)2]·2DMF·2H2O (2), were synthesized using the nonlinear dicarboxylate ligand, 4,4'-oxybis(benzoic acid) (H2oba) and characterized by IR spectroscopy and single-crystal X-ray crystallography. Single-crystal X-ray data show that 1 and 2 are two-dimensional coordination polymers that can be extended to three-dimensional supramolecular networks by CH…O interactions. These two new coordination polymers were also sonochemically synthesized while sonication time and power of irradiation influencing size and morphology of nano-structured compounds were also studied...
January 2017: Ultrasonics Sonochemistry
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