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https://www.readbyqxmd.com/read/28092824/chemically-modified-amino-porphyrin-tio2-for-the-degradation-of-acid-black-1-under-day-light-illumination
#1
Balu Krishnakumar, Avula Balakrishna, Cláudia T Arranja, Carlos M F Dias, Abilio J F N Sobral
In this paper, for the first time, chemically modified 5,10,15,20-meso-tetra-(para-amino)-phenyl-porphyrin/TiO2 (TPAPP/TiO2) was prepared and used for the degradation of an azo dye Acid Black 1 (AB 1) under direct sunlight. Initially, TiO2 was prepared by sol-gel method. Before making a TPAPP/TiO2 composite, the surface modification of TiO2 was carried out with glycidoxypropyltrimethoxy silane (GPTMS) which acts as a coupling agent. This is an epoxy terminated silane and could easily bond to the amino group of TPAPP through epoxy cleavage...
January 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28092819/silver-nanoparticles-supported-over-mesoporous-alumina-as-an-efficient-nanocatalyst-for-n-alkylation-of-hetero-aromatic-amines-and-aromatic-amines-using-alcohols-as-alkylating-agent
#2
Priyanka Paul, Piyali Bhanja, Noor Salam, Usha Mandi, Asim Bhaumik, Seikh Mafiz Alam, Sk Manirul Islam
We have successfully embedded rhombohedral crystallites of silver nanoparticles (Ag-NPs) over mesoporous alumina (Ag@Al2O3) material for the first time. The Ag@Al2O3 has been characterized by powder X-ray diffraction (PXRD), ultra high resolution transmission electron microscopy (UHR-TEM), scanning electron microscopy (SEM), N2 adsorption/desorption isotherm, Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectra (UV-Vis), and thermogravimetric analysis (TGA). The PXRD confirms the presence of the rhombohedral phase of Ag nanoparticles...
January 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28091999/porous-nano-cerium-oxide-wood-chip-biochar-composites-for-aqueous-levofloxacin-removal-and-sorption-mechanism-insights
#3
Shengze Yi, Yuanyuan Sun, Xin Hu, Hongxia Xu, Bin Gao, Jichun Wu
The adsorption removal of levofloxacin (LEV), a widely used fluoroquinolone antibiotic, by using the biochars derived from the pyrolysis of pine wood chip pretreated with cerium trichloride was investigated through batch sorption experiments and multiple characterization techniques. The differences in the basic physicochemical properties between Ce-impregnated biochars and the pristine biochars were confirmed by the analysis of elemental compositions, specific surface areas, energy dispersive spectrometry, X-ray diffraction, and thermo-gravimetry...
January 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28091940/purification-and-sequence-characterization-of-chondroitin-sulfate-and-dermatan-sulfate-from-fishes
#4
Na Lin, Xiaoli Mo, Yang Yang, Hong Zhang
Chondroitin sulfate (CS) and dermatan sulfate (DS) were extracted and purified from skins or bones of salmon (Salmo salar), snakehead (Channa argus), monkfish (Lophius litulon) and skipjack tuna (Katsuwonus pelamis). Size, structural sequences and sulfate groups of oligosaccharides in the purified CS and DS could be characterized and identified using high performance liquid chromatography (HPLC) combined with Orbitrap mass spectrometry. CS and DS chain structure varies depending on origin, but motif structure appears consistent...
January 14, 2017: Glycoconjugate Journal
https://www.readbyqxmd.com/read/28091789/comparative-investigation-on-a-hexane-degrading-strain-with-different-cell-surface-hydrophobicities-mediated-by-starch-and-chitosan
#5
Dong-Zhi Chen, Ning-Xin Jiang, Jie-Xu Ye, Zhuo-Wei Cheng, Shi-Han Zhang, Jian-Meng Chen
Bioremediation usually exhibits low removal efficiency toward hexane because of poor water solubility, which limits the mass transfer rate between the substrate and microorganism. This work aimed to enhance the hexane degradation rate by increasing cell surface hydrophobicity (CSH) of the degrader, Pseudomonas mendocina NX-1. The CSH of P. mendocina NX-1 was manipulated by treatment with starch and chitosan solution of varied concentrations, reaching a maximum hydrophobicity of 52%. The biodegradation of hexane conformed to the Haldane inhibition model, and the maximum degradation rate (ν max) of the cells with 52% CSH was 0...
January 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28091786/a-new-look-at-the-drug-resistance-investigation-of-uropathogenic-e-coli-strains
#6
Wioletta Adamus-Białek, Łukasz Lechowicz, Anna B Kubiak-Szeligowska, Monika Wawszczak, Ewelina Kamińska, Magdalena Chrapek
Bacterial drug resistance and uropathogenic tract infections are among the most important issues of current medicine. Uropathogenic Escherichia coli strains are the primary factor of this issue. This article is the continuation of the previous study, where we used Kohonen relations to predict the direction of drug resistance. The characterized collection of uropathogenic E. coli strains was used for microbiological (the disc diffusion method for antimicrobial susceptibility testing), chemical (ATR/FT-IR) and mathematical (artificial neural networks, Ward's hierarchical clustering method, the analysis of distributions of inhibition zone diameters for antibiotics, Cohen's kappa measure of agreement) analysis...
January 13, 2017: Molecular Biology Reports
https://www.readbyqxmd.com/read/28090811/antibacterial-combination-therapy-using-co-3-cu-2-zn-2-and-pd-2-complexes-their-calf-thymus-dna-binding-studies
#7
Fatemeh Khosravi, Hassan Mansouri-Torshizi
Four Co(III)-, Cu(II)-, Zn(II)- and Pd(II)- based potent antibacterial complexes of formula K3[Co(ox)3].3H2O (I), [Cu(bpy)2Cl]Cl.5H2O (II), [Zn(bpy)3]Cl2 (III) and [Pd(bpy)2](NO3)2 (IV) (where ox is oxalate and bpy is 2,2'-bipyridine) were synthesized. They were characterized by elemental analyses, molar conductance measurements, UV-Vis, FT-IR, (1)H NMR and (13)C NMR spectra. These metal complexes were ordered in three combination series of I+II, I+II+III and I+II+III+IV. Antibacterial activity was tested for each of these four metal complexes and their combinations against gram positive and gram negative bacteria...
January 16, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28090725/non-aqueous-microwave-assisted-syntheses-of-deca-and-hexa-molybdovanadates
#8
Samuel Spillane, Rupali Sharma, Athanasios Zavras, Roger Mulder, C André Ohlin, Lars Goerigk, Richard A J O'Hair, Chris Ritchie
We report a new approach for the synthesis of heterohexa- and heterodecametalates via the use of non-aqueous, microwave-assisted reaction conditions. The two novel molybdovanadates have been isolated and characterized in the solid and solution states using single-crystal X-ray diffraction, FT-IR, UV/Vis, multinuclear NMR spectroscopy, and ESI-MS. The relative stabilities of the possible structural isomers were probed using dispersion-corrected DFT calculations for both polyoxometalate systems.
January 16, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28090610/highly-dispersible-edge-selectively-oxidized-graphene-with-improved-electrical-performance
#9
Jisoo Park, Yern Seung Kim, Sae Jin Sung, Taehoon Kim, Chong Rae Park
We prepared liquid phase exfoliated edge-selectively oxidized graphene (LPEOG) with a high concentration in water (∼14.7 mg ml(-1)) and a high ratio of a single layer (70%). The edge of graphite was selectively oxidized by step II oxidation of the modified Hummers method, and we subsequently exfoliated the edge-selectively oxidized graphite (EOG) into LPEOG. The edge selective oxidation of the LPEOG was confirmed by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), zeta-potentiometry, Raman spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM), and transmission electron microscopy (TEM)...
January 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/28090126/fourier-transform-infrared-absorption-spectroscopy-for-quantitative-analysis-of-gas-mixtures-at-low-temperatures-for-homeland-security-applications
#10
D C Meier, K D Benkstein, W S Hurst, P M Chu
Performance standard specifications for point chemical vapor detectors are established in ASTM E 2885-13 and ASTM E 2933-13. The performance evaluation of the detectors requires the accurate delivery of known concentrations of the chemical target to the system under test. Referee methods enable the analyte test concentration and associated uncertainties in the analyte test concentration to be validated by independent analysis, which is especially important for reactive analytes. This work extends the capability of a previously demonstrated method for using Fourier transform infrared (FT-IR) absorption spectroscopy for quantitatively evaluating the composition of vapor streams containing hazardous materials at Acute Exposure Guideline Levels (AEGL) to include test conditions colder than laboratory ambient temperatures...
May 2017: Journal of Testing and Evaluation
https://www.readbyqxmd.com/read/28089931/a-novel-polysaccharide-with-antioxidant-hiv-protease-inhibiting-and-hiv-integrase-inhibiting-activities-from-fomitiporia-punctata-p-karst-murrill-basidiomycota-hymenochaetales
#11
Fang Liu, Yinping Wang, Keren Zhang, Yijun Wang, Rong Zhou, Yan Zeng, Yajie Han, Tzi Bun Ng
A novel polysaccharide fraction (G1) was obtained from the fungus Fomitiporia punctata (P.Karst.) Murrill. G1 exhibited a molecular weight of approximately 151kDa. The FT-IR results suggested that the monosaccharide components of G1 possessed furanoid rings and there were β-glycosidic bonds between the sugar units. The (1)H NMR results showed that G1 was composed of arabinose, fructose, galactose and glucose in the molar ratio of 1.6:3.8:19.7:19.7, as determined by gas chromatography-mass spectrometry (GC-MS) and high performance liquid chromatography (HPLC)...
January 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28089930/scaffolds-containing-chitosan-gelatin-and-graphene-oxide-for-bone-tissue-regeneration-in-vitro-and-in-vivo
#12
S Saravanan, Anjali C, M Vairamani, T P Sastry, K S Subramanian, N Selvamurugan
Critical-sized bone defects are augmented with cell free and cell loaded constructs to bridge bone defects. Improving the properties of three-dimensional scaffolds with multiple polymers and others is of growing interest in recent decades. Chitosan (CS), a natural biopolymer has limitations for its use in bone regeneration, and its properties can be enhanced with other materials. In the present study, the composite scaffolds containing CS, gelatin (Gn) and graphene oxide (GO) were fabricated through freeze-drying...
January 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28089837/direct-midline-posterior-corpectomy-and-fusion-of-a-lumbar-burst-fracture-with-retrospondyloptosis-a-case-report
#13
Arthur Carminucci, Rachid Assina, R Nick Hernandez, Ira M Goldstein
BACKGROUND: Traumatic burst fractures of the lumbar spine can result in significant neurological injury and mechanical instability. The ideal surgical approach for the treatment of unstable lumbar spine burst fractures remains debatable. CASE DESCRIPTION: A 37 year-old male presented with severe neurological injury including loss of motor function below the level of the iliopsoas muscles bilaterally, saddle anesthesia, and absent rectal tone, following a fall from 60 ft...
January 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28089400/selective-sequential-separation-of-abs-hips-and-pvc-from-automobile-and-electronic-waste-shredder-residue-by-hybrid-nano-fe-ca-cao-assisted-ozonisation-process
#14
Srinivasa Reddy Mallampati, Byoung Ho Lee, Yoshiharu Mitoma, Cristian Simion
The separation of plastics containing brominated flame retardants (BFR) like (acrylonitrile-butadiene-styrene (ABS), high-impact polystyrene (HIPS), and polyvinyl chloride (PVC)) from automobile and electronic waste shredder residue (ASR/ESR) are a major concern for thermal recycling. In laboratory scale tests using a hybrid nano-Fe/Ca/CaO assisted ozonation treatment has been found to selectively hydrophilize the surface of ABS/HIPS and PVC plastics, enhancing ABS wettability and thereby promoting its separation from ASR/ESR by means of froth flotation...
January 12, 2017: Waste Management
https://www.readbyqxmd.com/read/28088570/achillea-millefolium-l-extract-mediated-green-synthesis-of-waste-peach-kernel-shell-supported-silver-nanoparticles-application-of-the-nanoparticles-for-catalytic-reduction-of-a-variety-of-dyes-in-water
#15
Bahar Khodadadi, Maryam Bordbar, Mahmoud Nasrollahzadeh
In this paper, silver nanoparticles (Ag NPs) are synthesized using Achillea millefolium L. extract as reducing and stabilizing agents and peach kernel shell as an environmentally benign support. FT-IR spectroscopy, UV-Vis spectroscopy, X-ray Diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDS), Thermo gravimetric-differential thermal analysis (TG-DTA) and Transmission Electron Microscopy (TEM) were used to characterize peach kernel shell, Ag NPs, and Ag NPs/peach kernel shell...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088566/removal-of-salicylic-acid-as-an-emerging-contaminant-by-a-polar-nano-dendritic-adsorbent-from-aqueous-media
#16
M Arshadi, F Mousavinia, M K Abdolmaleki, M J Amiri, A Khalafi-Nezhad
A polar nano-dendritic adsorbent containing amine groups (SAPAMAA) was synthesized onto the nanoparticles of SiO2Al2O3 and its uptake of salicylic acid (SA) from the synthetic and real water was investigated. The synthesized nanomaterials were fully studied by nuclear magnetic resonance spectrum ((1)H NMR and (13)C NMR), Fourier transform infrared spectroscopy (FT-IR), zeta potential (ζ), inductively coupled plasma atomic emission spectroscopy (ICP-AES), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and elemental analysis...
January 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088562/the-effect-of-high-temperature-sol-gel-polymerization-parameters-on-the-microstructure-and-properties-of-hydrophobic-phenol-formaldehyde-silica-hybrid-aerogels
#17
Mohamad Mehdi Seraji, Ghasem Sameri, Jamal Davarpanah, Ahmad Reza Bahramian
Phenol-formaldehyde/silica hybrid aerogels with different degree of hydrophobicity were successfully synthesized via high temperature sol-gel polymerization. Tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were used as precursor and co-precursor of the hydrophobic silica-based phase, respectively. The hydrolysis step of silica based sols were conducted by acid catalyzed reactions and HCl was used as hydrolysis catalyst. The chemical structure of prepared hybrid aerogels was characterized by Fourier Transform Infrared spectroscopy (FT-IR)...
January 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088281/flow-injection-microfluidic-device-with-on-line-fluorescent-derivatization-for-the-determination-of-cr-iii-and-cr-vi-in-water-samples-after-solid-phase-extraction
#18
Guilong Peng, Qiang He, Ying Lu, Jing Huang, Jin-Ming Lin
In this paper, a rapid and simple method using magnetic multi-walled carbon nanotubes (MWCNTS), as a solid-phase extraction (SPE) sorbent, was successfully developed for extraction and preconcentration trace amounts of Cr(III) in water samples. The synthesized magnetic-MWCNTs nanocomposite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). A rhodamine derivative (R1) was synthesized and characterized as a highly selective and sensitive fluorescent derivatizing agent for Cr(III)...
February 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28088122/a-comparative-study-on-the-effects-of-ultrathin-luminescent-graphene-oxide-quantum-dot-goqd-and-graphene-oxide-go-nanosheets-on-the-interfacial-interactions-and-mechanical-properties-of-an-epoxy-composite
#19
B Karimi, B Ramezanzadeh
The reinforcement effect of graphene oxide nanosheets on the mechanical properties of an epoxy coating has been extensively studied. However, the effect of graphene oxide quantum dot (GOQD) as a new unique carbon based nanomaterial (with lateral dimension of 5-6nm and thickness of one carbon atom) on the mechanical properties of epoxy coating has not been reported and compared with GO yet. So this study aims at fabrication of a high-performance polymer composite with unique mechanical properties using GOQD nanosheets...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088117/adsorption-of-phosphate-from-aqueous-solution-using-iron-zirconium-modified-activated-carbon-nanofiber-performance-and-mechanism
#20
Weiping Xiong, Jing Tong, Zhaohui Yang, Guangming Zeng, Yaoyu Zhou, Dongbo Wang, Peipei Song, Rui Xu, Chen Zhang, Min Cheng
Phosphate (P) removal is significant for the prevention of eutrophication in natural waters. In this paper, a novel adsorbent for the removal of P from aqueous solution was synthesized by loading zirconium oxide and iron oxide onto activated carbon nanofiber (ACF-ZrFe) simultaneously. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results showed that P adsorption was highly pH dependent and the optimum pH was found to be 4...
January 7, 2017: Journal of Colloid and Interface Science
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