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FT-IR spectroscopy

Qiujing Dong, Chunhua Luo, Na Li, Jiaxiang Chi, Qingqing Zhang
A series of copolymers with an adamantyl side group (poly(NIPAM-co-AdMA) and poly(DMAM-co-AdMA)) were prepared by radical copolymerization of N -isopropylacrylamide (NIPAM) and N , N -dimethylacrylamide (DMAM) with a 2-methyl-2-adamantylmethacrylate (AdMA) monomer. The structure and composition of the as-synthesized copolymers were characterized by Fourier transform infrared (FT-IR) spectroscopy, proton nuclear magnetic resonance (¹H NMR) spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), and elemental analysis...
March 22, 2018: Materials
Faezeh Kashanian, Mehran Habibi Rezaei, Ali Akbar Moosavi Movahedi, Alireza Bagherpour, Maryam Vatani
Due to the numerous biological applications of Magnetite [Fe3O4] nanoparticles (MNPs), it is essential to identify the influence of these nanoparticles on basic biological processes. Therefore, in this research, the effect of MNPs on the structure and activity of hen egg white lysozyme (HEWL) (EC as a model protein was examined using tryptophan intrinsic fluorescence, UV/Vis, and circular dichroism (CD) spectroscopy. Moreover, enzyme activities were analyzed by a turbidometric approach in the presence of MNPs at concentrations providing MNPs/HEWL ratios in the range of 0...
March 22, 2018: Biomedical Materials
S Prakash, K Rajeswari, P Divya, M Ferlin, C T Rajeshwari, B Vanavil
Curdlan gum is a neutral water-insoluble bacterial exopolysaccharide composed primarily of linear β-(1,3) glycosidic linkages. Recently, there has been increasing interest in the applications of curdlan and its derivatives. Curdlan is found to inhibit tumors and its sulfated derivative possess anti- HIV activity. Curdlan is biodegradable, non-toxic towards human, environment and edible which makes it suitable as drug-delivery vehicles for sustained drug release. The increasing demand for the growing applications of curdlan requires an efficient high yield fermentation production process so as to satisfy the industrial needs...
March 21, 2018: Preparative Biochemistry & Biotechnology
Soodabeh Davaran, Hamed Fazeli, Aliyeh Ghamkhari, Fariborz Rahimi, Ommoleila Molavi, Maryam Anzabi, Roya Salehi
A Novel poly [2-hydroxyethyl methacrylate-Lactide-dimethylaminoethyl methacrylate quaternary ammonium alkyl halide] [P(HEMA-LA-MADQUAT)] copolymer was synthesized through combination of ring opening polymerization (ROP) and 'free' radical initiated polymerization methods. This newly developed copolymer was fully characterized by FT-IR,1 HNMR and13 CNMR spectroscopy. Micellization of the copolymer was performed by dialysis membrane method and obtained micelles were characterized by FESEM, dynamic light scattering (DLS), zeta potential (ξ), and critical micelle concentration (CMC) measurements...
March 21, 2018: Journal of Biomaterials Science. Polymer Edition
Jiuyan Chen, Shurui Cao, Ming Zhu, Cunxian Xi, Lei Zhang, Xianliang Li, Guomin Wang, Yuantao Zhou, Zhiqiong Chen
An adsorbent, consisting of silica-coated Fe3 O4 grafted graphene oxide and β-cyclodextrin (Fe3 O4 @SiO2 /GO/β-CD), which possessed the merits of antioxidation, superparamagnetism, high surface area, high supramolecular recognition and environment friendly, was successfully fabricated. Considering the synergy between β-CD and graphene oxide in adsorption mechanism, the synthesized adsorbent could grasp compounds especially with aromatic structures through π-π interaction, hydrophobic interaction and host-guest inclusion complex forming...
March 4, 2018: Journal of Chromatography. A
Piotr Rożek, Magdalena Król, Włodzimierz Mozgawa
In the present work fly-ash based geopolymers with different contents of alkali-activator and water were prepared. Alkali-activation was conducted with sodium hydroxide (NaOH) at the SiO2 /Na2 O molar ratio of 3, 4, and 5. Water content was at the ratio of 30, 40, and 50wt% in respect to the weight of the fly ash. Structural and microstructural characterization (FT-IR spectroscopy,29 Si and27 Al MAS NMR, X-ray diffraction, SEM) of the specimens as well as compressive strength and apparent density measurements were carried out...
March 13, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Min Cheng, Guangming Zeng, Danlian Huang, Cui Lai, Yang Liu, Chen Zhang, Jia Wan, Liang Hu, Chengyun Zhou, Weiping Xiong
The presence of antibiotics in aquatic environments has attracted global concern. Fenton process is an attractive yet challenging method for antibiotics degradation, especially when such a reaction can be conducted at neutral pH values. In this study, a novel composite Fe/Co catalyst was synthesized via the modification of steel converter slag (SCS) by salicylic acid-methanol (SAM) and cobalt nitrate (Co(NO3 )2 ). The catalysts were characterized by N2 -Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS)...
March 10, 2018: Water Research
Misagh Ghobadi, Mahdi Gharabaghi, Hadi Abdollahi, Zohreh Boroumand, Marzieh Moradian
In recent decades, considerable amounts of rare earth elements have been used and then released into industrial wastewater, which caused serious environmental problems. In this work, in order to recycle rare earth cations (La3+ and Ce3+ ) from aqueous solutions, MnFe2 O4 -Graphene oxide magnetic nanoparticles were synthesized and after characterization studies, their adsorption isotherms, kinetics, thermodynamics and desorption were comprehensively investigated. Characterized was performed using XRD, FE-SEM, FT-IR, Raman spectroscopy, VSM, BET and DLS...
March 8, 2018: Journal of Hazardous Materials
Keppanan Ravindran, Sivaperumal Sivaramakrishnan, Mubasher Hussain, Chandra Kanta Dash, Bamisope Steve Bamisile, Muhammad Qasim, Wang Liande
Entomopathogenic fungi are rich sources of bioactive secondary metabolites that possess insecticidal properties. The present study reported a novel approach for the identification of insecticidal compounds produced by Lecanicillium lecanii 09 and to assess their toxicity against the diamondback moth Plutella xylostella L. The cyclic peptides groups of toxic substances were separated from L. lecanii 09 through submerged liquid state fermentation. The most abundant toxic metabolite, Bassianolide was purified by high-performance liquid chromatography (HPLC) and its molecular weight and purity were determined by Liquid chromatography - mass spectroscopy (LC-MS), Fourier transformed infrared spectroscopy (FT-IR), and H1 nuclear magnetic resonance (NMR) respectively...
March 15, 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
Sasikumar Arunachalam Palaniyandi, Karthiyaini Damodharan, Joo-Won Suh, Seung Hwan Yang
The present study was focused on the production, characterization and in vitro prebiotic evaluation of exopolysaccharide (EPS) from Bacillus sonorensis MJM60135isolated from Ganjang (fermented soy sauce). StrainMJM60135 showed the highest production(8.4±0.8 g/L) of EPS compared to other isolates that were screened for EPS production based on ropy culture morphology. Further, MJM60135 was cultured in 5L medium and EPS was extracted by ethanol precipitation. Emulsification activity of EPS was higher in toluene than o -xylene...
March 16, 2018: Journal of Microbiology and Biotechnology
Sen Yao, Tao Li, JieQing Li, HongGao Liu, YuanZhong Wang
Boletus griseus and Boletus edulis are two well-known wild-grown edible mushrooms which have high nutrition, delicious flavor and high economic value distributing in Yunnan Province. In this study, a rapid method using Fourier transform infrared (FT-IR) and ultraviolet (UV) spectroscopies coupled with data fusion was established for the discrimination of Boletus mushrooms from seven different geographical origins with pattern recognition method. Initially, the spectra of 332 mushroom samples obtained from the two spectroscopic techniques were analyzed individually and then the classification performance based on data fusion strategy was investigated...
March 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Jie-Lin Wang, Qian Chen, Bei-Bei Du, Lu Cao, Hong Lin, Zhong-Yong Fan, Jian Dong
The composite polylactide PLLA/β-TCP scaffolds were fabricated by solution casting and were coated with gelatin/hydroxyapatite (Gel/HAp) to improve the biological properties of the composite scaffolds. The Gel/HAp mixture was prepared using an in situ reaction, and a grafting-coating method was used to increase the efficiency of coating the PLLA/β-TCP matrix with Gel/HAp. First, free amino groups were introduced by 1,6-hexanediamine to aminolyze the PLLA/β-TCP matrix surface. Second, glutaraldehyde was coupled to Gel/HAp as a crosslinking agent...
June 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Siamak Javanbakht, Hassan Namazi
Creating anticancer properties in the hydrogel film could make it as a candidate for treating cancer tissues. In this work, a novel hydrogel nanocomposite films with anticancer properties were designed via incorporation of graphene quantum dot (GQD) as a nanoparticle into carboxymethyl cellulose (CMC) hydrogel and using doxorubicin (DOX) as drug model with broad-spectrum anticancer properties. Drug release studies carried out at two different pHs and the MTT assay was evaluated for DOX-loaded CMC/GQD nanocomposite hydrogel films against blood cancer cells (K562)...
June 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Zhichen Duan, Jian Liu, Juan Shi, Zhen Zhao, Yuechang Wei, Xiao Zhang, Guiyuan Jiang, Aijun Duan
A Ce0.3 TiOx oxide carrier was synthesized via a sol-gel process, and Ce0.3 TiOx supported metal (M=Cd, Mn, Fe, W, Mo) oxide catalysts were prepared by the method of incipient-wetness impregnation. The catalysts were characterized by means of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and Temperature-programmed reduction with H2 (H2 -TPR)...
March 2018: Journal of Environmental Sciences (China)
Radosław Mrówczyński, Artur Jędrzak, Kosma Szutkowski, Bartosz F Grześkowiak, Emerson Coy, Roksana Markiewicz, Teofil Jesionowski, Stefan Jurga
Polydopamine (PDA)-coated magnetic nanoparticles functionalized with mono-6-thio-β-cyclodextrin (SH-βCD) were obtained and characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Nuclear and Magnetic Resonance Imaging (NMR and MRI), and doxorubicin (DOXO)-loading experiments. The liver cancer cellular internalization of DOXO-loaded nanoparticles was investigated by confocal imaging microscopy. Synthesized nanomaterials bearing a chemotherapeutic drug and a layer of polydopamine capable of absorbing near-infrared light show high performance in the combined chemo- and photothermal therapy (CT-PTT) of liver cancer due to the synergistic effect of both modalities as demonstrated in vitro...
March 16, 2018: Nanomaterials
B Lakshmanna, N Jayaraju, T Lakshmi Prasad, G Sreenivasulu, K Nagalakshmi, M Pramod Kumar, M Madakka
X-ray diffraction (XRD), Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDS), and Fourier Transform Infrared Spectroscopy (FT-IR), were applied to analyze the organic matrix of two Molluscan shells . The Mollusca shells are mineral structure and calcium carbonate crystallized as aragonite. The FT-IR spectra showed Alkyl Halide, Alkanes, Alcohols, Amides, Aromatic, and Hydroxyl groups in the organic matrix of the whole (organic and mineral) Molluscan shells. SEM images of particles of the two Molluscan shells at different magnifications were taken...
February 2018: Data in Brief
Nazan Kaloğlu, İsmail Özdemir, Nevin Gürbüz, Hakan Arslan, Pierre H Dixneuf
A series of new benzimidazolium halides were synthesized in good yields as unsymmetrical N -heterocyclic carbene (NHC) precursors containing the N-CH₂-arene group. The benzimidazolium halides were readily converted into ruthenium(II)-NHC complexes with the general formula [RuCl₂(η⁶,η¹-arene-CH₂-NHC)]. The structures of all new compounds were characterized by ¹H NMR (Nuclear Magnetic Resonance),13 C NMR, FT-IR (Fourier Transform Infrared) spectroscopy and elemental analysis techniques. The single crystal structure of one benzimidazole ruthenium complex, 2b , was determined...
March 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Vishnu Manirethan, Keyur Raval, Reju Rajan, Harsha Thaira, Raj Mohan Balakrishnan
The difficulty in removal of heavy metals at concentrations below 10 mg/L has led to the exploration of efficient adsorbents for removal of heavy metals. The adsorption capacity of biosynthesized melanin for Mercury (Hg(II)), Chromium (Cr(VI)), Lead (Pb(II)) and Copper (Cu(II)) was investigated at different operating conditions like pH, time, initial concentration and temperature. The heavy metals adsorption process was well illustrated by the Lagergren's pseudo-second-order kinetic model and the equilibrium data fitted excellently to Langmuir isotherm...
March 10, 2018: Journal of Environmental Management
Ahmed I El-Batal, Nawal E Al-Hazmi, Farag M Mosallam, Gharieb S El-Sayyad
Mono-dispersed copper nanoparticles (CuNPs) were constructed using cheap polysaccharides (citrus pectin, chitosan, and sodium alginate), and by appropriating aqueous fermented fenugreek powder (FFP) under the action of Pleurotus ostreatus (as reducing and preserving means), through the influence of gamma irradiation. The created CuNPs are described by UV-Vis. spectroscopy TEM, DLS, XRD, and FT-IR. XRD study of the CuNPs confirmed the generation of metallic CuNPs. The nucleation and the production mechanism of CuNPs are moreover explained...
March 9, 2018: Microbial Pathogenesis
Ikram Daou, Najia Moukrad, Omar Zegaoui, Fouzia Rhazi Filali
In this study, ZnO-TiO2 nanoparticles were synthesized from three different precursors for ZnO (zinc acetate di-hydrate, zinc nitrate hexahydrate and zinc sulfate heptahydrate) and titanium (IV) isopropoxide for TiO2 . The prepared nanomaterials were calcined at 500 °C for 3 h and characterized by various physicochemical techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy, combined with energy dispersive X-ray spectroscopy (TEM-EDS)...
March 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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