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https://www.readbyqxmd.com/read/28231455/synthetic-investigation-physicochemical-characterization-and-antibacterial-evaluation-of-ternary-bi-iii-systems-with-hydroxycarboxylic-acid-and-aromatic-chelator-substrates
#1
C M Nday, E Halevas, A Tsiaprazi-Stamou, D Eleftheriadou, A Hatzidimitriou, G Jackson, D Reid, A Salifoglou
Due to its physical and chemical properties, bismuth (Bi(III)) is widely used in the treatment of several gastrointestinal and skin diseases, and infections caused by bacteria. Herein, its known antimicrobial potential was taken into consideration in the synthesis of two new hybrid ternary materials of Bi(III) with the physiological α-hydroxycarboxylic glycolic acid and 1,10-phenanthroline (phen), [Bi2(C2H2O3)2(C2H3O3)(NO3)]n(.) nH2O (1) and [Bi(C12H8N2)(NO3)4](C10H8N4) (2), aiming at improving its antibacterial properties...
February 11, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28231145/recent-advances-in-techniques-for-starch-esters-and-the-applications-a-review
#2
REVIEW
Jing Hong, Xin-An Zeng, Charles S Brennan, Margaret Brennan, Zhong Han
Esterification is one of the most important methods to alter the structure of starch granules and improve its applications. Conventionally, starch esters are prepared by conventional or dual modification techniques, which have the disadvantages of being expensive, have regent overdoses, and are time-consuming. In addition, the degree of substitution (DS) is often considered as the primary factor in view of its contribution to estimate substituted groups of starch esters. In order to improve the detection accuracy and production efficiency, different detection techniques, including titration, nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis/infrared spectroscopy (TGA/IR) and headspace gas chromatography (HS-GC), have been developed for DS...
July 9, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28230995/synthesis-of-high-quality-biodiesel-using-feedstock-and-catalyst-derived-from-fish-wastes
#3
Devarapaga Madhu, Rajan Arora, Shalini Sahani, Veena Singh, Yogesh Chandra Sharma
A low cost and high purity calcium oxide (CaO) was prepared from waste crab shells which were extracted from the dead crabs, used as efficient solid base catalyst in the synthesis of biodiesel. Raw fish oil was extracted from the waste parts of fish through mechanical expeller followed by solvent extraction. Physical as well as chemical properties of raw fish oil were studied and FFA's composition was analysed with GC-MS. Stable and high purity calcium oxide (CaO) was obtained when the material was calcined at 800 °C for 4 h...
February 23, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28230805/preparation-of-photoirradiation-molecular-imprinting-polymer-for-selective-separation-of-branched-cyclodextrins
#4
Haoran Fan, Jinpeng Wang, Qingran Meng, Xueming Xu, Tianming Fan, Zhengyu Jin
In the present study, photoirradiation molecularly imprinted polymer (MIP) with azobenzene was used as a functional monomer for the selective separation of the branched cyclodextrins. The functional monomer 4-methacryloyloxy azobenzene (MAA) and the molecular template 6-O-α-d-maltosyl-β-cyclodextrin (G2-β-CD) were implemented for the molecular imprinting. The core-shell structure of photoirradiation MIP was visualized by the transmission electron microscopy (TEM). With Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), we identified that G2-β-CD was imprinted into the polymer and removed from the MIP...
February 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28230346/high-strength-stereolithographic-3d-printed-nanocomposites-graphene-oxide-metastability
#5
Jill Z Manapat, Joey Dacula Mangadlao, Brylee David Buada Tiu, Grace C Tritchler, Rigoberto C Advincula
The weak thermomechanical properties of commercial 3D printing plastics have limited the technology's application mainly to rapid prototyping. In this report, we demonstrate a simple approach that takes advantage of the metastable, temperature-dependent structure of graphene oxide (GO) to enhance the mechanical properties of conventional 3D-printed resins produced by stereolithography (SLA). A commercially available SLA resin was reinforced with minimal amounts of GO nanofillers and thermally annealed at 50 °C and 100 °C for 12 hours...
February 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225615/structural-characterization-and-in-vitro-fermentation-of-%C3%AE-mannooligosaccharides-produced-from-locust-bean-gum-by-gh-26-endo-%C3%AE-1-4-mannanase-manb-1601
#6
Praveen Kumar Srivastava, Deepesh Panwar, Harish Prashanth Kv, Mukesh Kapoor
Size exclusion chromatography of β-mannooligosaccharides (β-MOS) mixture, obtained from ManB-1601 hydrolysis of locust bean gum, resulted in separation of oligosaccharides with varied degree of polymerization (DP 2, 3 and 5). The oligosaccharides were structurally [ESI-MS, FTIR, XRD, TGA and NMR (1H and 13C)] and functionally (in vitro fermentation) characterized. DP2 oligosaccharide was composed of two species (A) mannopyranose β-1,4 mannopyranose and (B) α-1,6-galactosyl-mannopyranose, while DP3 oligosaccharide showed presence of only one species i...
February 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28225126/carborane-layered-double-hydroxide-nanohybrids-for-potential-targeted-and-magnetically-targeted-bnct-applications
#7
Ahmet Nedim Ay, Hande Akar, Adnana Zaulet, Clara Viňas, Francesc Teixidor, Birgul Zumreoglu-Karan
Carborane-intercalated layered double hydroxide nanohybrids (CB-LDH) and a magnesium ferrite (MF) supported-CB-LDH core-shell nanocomposite (CB-LDH@MF) are reported. The preparation of nanohybrids were carried out by exchanging the interlayer nitrate groups of Mg-Al-NO3-LDH with monothiol-o-carborane (SCB), 1-methyl-2-carboxyl-o-carborane (MeCB), 1-phenyl-2-carboxyl-o-carborane (PhCB) and 1,12-dicarboxyl-p-carborane (COOHCB) molecules. A magnetic core-shell nanocomposite was further prepared by supporting the COOHCB-LDH nanohybrid on MF nanoparticles...
February 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28224890/phosphorylation-of-chitosan-hema-interpenetrating-polymer-network-prepared-by-%C3%AE-radiation-for-metal-ions-removal-from-aqueous-solutions
#8
Ahmed M Elbarbary, Mohamed Mohamady Ghobashy
Interpenetrating polymer network (IPN) hydrogels, based on chitosan (CS) and 2-hydroxyethyl methacrylate (HEMA), have been prepared by γ-radiation followed by chemical modification via phosphorylation reaction and used for adsorption of Ca(II), Cu(II) and Zn(II) ions from their aqueous solutions. The gel content (%) increases with increasing the HEMA concentration. The maximum swelling (%) observed at the ratio (70/30) (CS/HEMA). CS/pHEMA IPN showed a higher thermal stability than CS. The phosphorylated hydrogel, Phos-(CS/pHEMA), characterized by XRD, EDS, SEM, DSC and TGA techniques...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28224888/spherical-nanocrystalline-cellulose-ncc-from-oil-palm-empty-fruit-bunch-pulp-via-ultrasound-assisted-hydrolysis
#9
Z A Zianor Azrina, M Dalour H Beg, M Y Rosli, Ridzuan Ramli, Norhafzan Junadi, A K M Moshiul Alam
Nanocrystalline cellulose (NCC) was isolated from oil palm empty fruit bunch pulp (EFBP) using ultrasound assisted acid hydrolysis. The obtained NCC was analysed using FESEM, XRD, FTIR, and TGA, and compared with raw empty fruit bunch fibre (REFB), empty fruit bunch pulp (EFBP), and treated empty fruit bunch pulp (TEFBP). Based on FESEM analysis, it was found that NCC has a spherical shaped after acid hydrolysis with the assistance of ultrasound. This situation was different compared to previous studies that obtained rod-like shaped of NCC...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28223869/compatibility-study-of-paracetamol-chlorpheniramine-maleate-and-phenylephrine-hydrochloride-in-physical-mixtures
#10
G G G de Oliveira, A Feitosa, K Loureiro, A R Fernandes, E B Souto, P Severino
Paracetamol (PAR), phenylephrine hydrochloride (PHE) and chlorpheniramine maleate (CPM) are commonly used in clinical practice as antipyretic and analgesic drugs to ameliorate pain and fever in cold and flu conditions. The present work describes the use of thermal analysis for the characterization of the physicochemical compatibility between drugs and excipients during the development of solid dosage forms. Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC) were used to study the thermal stability of the drug and of the physical mixture (drug/excipients) in solid binary mixtures (1:1)...
January 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28219034/preparation-of-core-shell-nanostructure-fe3o4-peg400-so3h-as-heterogeneous-and-magnetically-recyclable-nanocatalyst-for-one-pot-synthesis-of-substituted-pyrroles-by-paal-knorr-reaction-at-room-temperature
#11
Fahimeh Bonyasi, Malak Hekmati, Hojat Veisi
An efficient procedure has been proposed for the loading of sulfonic acid groups on the surface of polyethylene glycol 400 (PEG400)-encapsulated Fe3O4 nanoparticles to synthesize a core-shell Fe3O4@PEG400-SO3H nano catalyst. Surface functionalization of magnetic particles in such a way is a refined method of bridging the gap amongst heterogeneous and homogeneous catalysis. The procured nano catalyst was classified through Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), wavelength-dispersive X-ray spectroscopy (WDX), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), BET, and back titration...
February 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28216668/adenine-functionalized-spongy-graphene-for-green-and-high-performance-supercapacitors
#12
Dalia M El-Gendy, Nabil A Abdel Ghany, E E Foad El Sherbini, Nageh K Allam
A simple method is demonstrated to prepare spongy adenine-functionalized graphene (SFG) as interconnected, porous 3-dimensional (3D) network crinkly sheets. Such 3D network structure provides better contact at the electrode/electrolyte interface and facilitates the charge transfer kinetics. The fabricated SFG was characterized by X-ray diffraction (XRD), FTIR, scanning electron microscopy (FESEM), Raman spectroscopy, thermogravimetric analysis (TGA), UV-vis absorption spectroscopy, and transmission electron microscopy (TEM)...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28214748/electrochemical-monitoring-of-biointeraction-by-graphene-based-material-modified-pencil-graphite-electrode
#13
Ece Eksin, Erhan Zor, Arzum Erdem, Haluk Bingol
Recently, the low-cost effective biosensing systems based on advanced nanomaterials have received a key attention for development of novel assays for rapid and sequence-specific nucleic acid detection. The electrochemical biosensor based on reduced graphene oxide (rGO) modified disposable pencil graphite electrodes (PGEs) were developed herein for electrochemical monitoring of DNA, and also for monitoring of biointeraction occurred between anticancer drug, Daunorubicin (DNR), and DNA. First, rGO was synthesized chemically and characterized by using UV-Vis, TGA, FT-IR, Raman Spectroscopy and SEM techniques...
February 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28214584/removal-of-cd-ii-and-hg-ii-from-effluents-by-ionic-solid-impregnated-chitosan
#14
Anita Shekhawat, Shashikant Kahu, D Saravanan, Ravin Jugade
Ethylhexadecyldimethyl ammonium bromide impregnated chitosan (EHDAIC) was prepared to remove cadmium and mercury from synthetic effluent. The adsorbent was characterized by FTIR, XRD, SEM, EDX and TGA-DTA. Adsorption studies were carried out under different conditions of pH, adsorbent dose, temperature, and contact time. The results showed that the adsorption capacity of EHDAIC is a function of the solution pH and the optimum pH for these metal ions was found to be 3.0. The equilibrium data has been described using Langmuir and Freundlich isotherm models...
February 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28214103/tracking-the-evolution-and-differences-between-guest-induced-phases-of-ga-mil-53-via-ultra-wideline-69-71-ga-solid-state-nmr-spectroscopy
#15
Yue Zhang, Bryan E G Lucier, Victor V Terskikh, Renlong Zheng, Yining Huang
Ga-MIL-53 is a metal-organic framework (MOF) that exhibits a "breathing effect," in which the pore size and overall MOF topology can be influenced by temperature, pressure, and host-guest interactions. The phase control afforded by this flexible framework renders Ga-MIL-53 a promising material for guest storage and sensing applications. In this work, the structure and behavior of four Ga-MIL-53 phases (as, ht, enp and lt), along with CO2 adsorbed within Ga-MIL-53 at various loading levels, has been investigated using (69/71)Ga solid-state NMR (SSNMR) experiments at 21...
January 31, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28207847/microarray-analysis-of-arabidopsis-wrky33-mutants-in-response-to-the-necrotrophic-fungus-botrytis-cinerea
#16
Arjun Sham, Khaled Moustafa, Shamma Al-Shamisi, Sofyan Alyan, Rabah Iratni, Synan AbuQamar
The WRKY33 transcription factor was reported for resistance to the necrotrophic fungus Botrytis cinerea. Using microarray-based analysis, we compared Arabidopsis WRKY33 overexpressing lines and wrky33 mutant that showed altered susceptibility to B. cinerea with their corresponding wild-type plants. In the wild-type, about 1660 genes (7% of the transcriptome) were induced and 1054 genes (5% of the transcriptome) were repressed at least twofold at early stages of inoculation with B. cinerea, confirming previous data of the contribution of these genes in B...
2017: PloS One
https://www.readbyqxmd.com/read/28206760/nano-engineered-eggshell-silver-tailored-co-polyester-polymer-blend-film-with-antimicrobial-properties
#17
Boniface J Tiimob, Gregory Mwinyelle, Woubit Abdela, Temesgen Samuel, Shaik Jeelani, Vijaya K Rangari
In this study, the reinforcement effect of different proportions of eggshell/silver nanomaterial (ES-Ag) on structural and antimicrobial properties of 70/30 poly (butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends were investigated. The ES-Ag was synthesized using a single step ball milling process, and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles...
February 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28203655/co2sno4-nanoparticles-as-a-high-performance-catalyst-for-oxidative-degradation-of-rhodamine-b-dye-and-pentachlorophenol-by-activation-of-peroxymonosulfate
#18
Monaam Ben Ali, Alexandre Barras, Ahmed Addad, Brigitte Sieber, Habib Elhouichet, Mokhtar Férid, Sabine Szunerits, Rabah Boukherroub
Spinel Co2SnO4 nanoparticles are synthesized by a facile hydrothermal route in alkaline solution using SnCl4 and CoCl2 as precursors. The structure, morphology and chemical composition of the nanoparticles are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The catalytic performance of the Co2SnO4 nanoparticles is thoroughly evaluated for peroxymonosulfate (PMS) activation for removal of rhodamine B (RhB) and pentachlorophenol (PCP) from water...
February 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28202922/removal-of-silver-nanoparticles-by-mussel-inspired-fe3o4-polydopamine-core-shell-microspheres-and-its-use-as-efficient-catalyst-for-methylene-blue-reduction
#19
Maoling Wu, Yinying Li, Rui Yue, Xiaodan Zhang, Yuming Huang
The removal of silver nanoparticles (AgNPs) from water is highly needed because of their increasing use and potential risk to the environment due to their toxic effects. Catalysis over AgNPs has received significant attention because of their highly catalytic performance. However, their use in practical applications is limited due to high cost and limited resources. Here, we present for the first time that the mussel-inspired Fe3O4@polydopamine (Fe3O4@PDA) nanocomposite can be used for efficient removal and recovery of AgNPs...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28196793/specific-factor-ix-mrna-and-protein-features-favor-drug-induced-readthrough-over-recurrent-nonsense-mutations
#20
Alessio Branchini, Mattia Ferrarese, Matteo Campioni, Giancarlo Castaman, Rosella Mari, Francesco Bernardi, Mirko Pinotti
Drug-induced readthrough over premature stop codons (PTCs) is a potentially attractive therapy for genetic disorders but a wide outcome variability has been observed. Through expression studies we investigated the responsiveness to the readthrough-inducing drug geneticin of eleven rationally-selected factor IX (FIX) nonsense mutations, present in 70% (324/469) of Hemophilia B (HB) patients with PTCs. Among the predicted readthrough-permissive TGA variants, only two (p.W240X, p.R384X) responded with a remarkable rescue of FIX activity...
February 14, 2017: Blood
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