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https://www.readbyqxmd.com/read/28732161/an-elegant-ph-responsive-nanovehicle-for-drug-delivery-based-on-triazine-dendrimer-modified-magnetic-nanoparticles
#1
Amir Landarani-Isfahani, Majid Moghadam, Shima Mohammadi, Maryam Royvaran, Naimeh Moshtael-Arani, Saghar Rezaei, Shahram Tangestaninejad, Valiollah Mirkhani, Iraj Mohammadpoor-Baltork
Owing to properties of magnetic nanoparticles and elegant three-dimensional macromolecule architectural features, dendrimeric structures have been investigated as nanoscale drug delivery systems. In this paper, a novel magnetic nanocarrier, generation two (G2) triazine dendrimer modified Fe3O4@SiO2 magnetic nanoparticles (MNP-G2), was designed, fabricated and characterized by Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28730527/characterization-of-the-complete-mitochondrial-genome-of-acanthoscelides-obtectus-coleoptera-chrysomelidae-bruchinae-with-phylogenetic-analysis
#2
Jie Yao, Hong Yang, Renhuai Dai
Acanthoscelides obtectus is a common species of the subfamily Bruchinae and a worldwide-distributed seed-feeding beetle. The complete mitochondrial genome of A. obtectus is 16,130 bp in length with an A + T content of 76.4%. It contains a positive AT skew and a negative GC skew. The mitogenome of A. obtectus contains 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes and a non-coding region (D-loop). All PCGs start with an ATN codon, and seven (ND3, ATP6, COIII, ND3, ND4L, ND6, and Cytb) of them terminate with TAA, while the remaining five (COI, COII, ND1, ND4, and ND5) terminate with a single T, ATP8 terminates with TGA...
July 20, 2017: Genetica
https://www.readbyqxmd.com/read/28730300/health-related-quality-of-life-in-paediatric-patients-with-congenital-heart-defects-association-with-the-type-of-heart-defect-and-the-surgical-technique
#3
A Heusch, H J Kahl, K O Hensel, G Calaminus
The aim of the study was to investigate the impact of a number of surgical interventions for a various congenital cardiac defects (CHDs) on self-reported HRQoL. METHODS: Patients who had received corrective surgery of several congenital heart defects (surgical VSD closure, Fallot, TGA after atrial or arterial switch or Fontan-type circulation for univentricular AV-connection) were interviewed in the office of their home peadiatric cardiologist. HRQoL in children along 7 dimensions was assessed using a standardised questionnaire (PEDQoL); information on the medical case history of each respondent was also collected...
July 20, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28729223/synthesis-characterization-and-antimicrobial-study-of-polymeric-transition-metal-complexes-of-mn-ii-co-ii-ni-ii-cu-ii-and-zn-ii
#4
Shamim Ahmad Khan, Shahab A A Nami, Shahnawaz Ahmad Bhat, Abdul Kareem, Nahid Nishat
Salen ligands comprising of o-phenylenediamine (salop) and p-phenylenediamine (salpp) have been synthesized. The salen ligand, salop undergo Schiff base reaction with Formaldehyde and Barbituric acid to generate novel polymeric Schiff base, SBOPA in one instance while the second salen ligand, salpp on Schiff base reaction with formaldehyde and piperazine gives another novel polymeric Schiff base, SBPBA. These polymeric Schiff base ligands, SBOPA and SBPBA generates polymeric metal complexes in high yields on reaction with transition metal acetates, M(CH3COO)2...
July 17, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28728260/-clinical-analysis-of-pacing-therapy-and-treatment-of-complications-during-follow-up-in-children
#5
P J Zhao, Y W Chen, F Li, Y Li, J P Yang, J J Wu
Objective: To analyze characteristics of permanent pacemaker implantation in children as well as treatment and prognosis of complications. Method: Clinical data of children who underwent endocardial or epicardial permanent pacemaker implantation between April 2000 and June 2016 in Shanghai Xinhua Hospital and Shanghai Children's Medical Center were analyzed retrospectively. These patients were discharged 5 days after implantation. Electrocardiogram, chest X ray, echocardiography and pacemaker programming were performed during follow-up...
July 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28728085/preparation-of-a-6-oh-quaternized-chitosan-derivative-through-click-reaction-and-its-application-to-novel-thermally-induced-polyelectrolyte-complex-hydrogels
#6
Yu Chen, Fengju Wang, Na Zhang, Yi Li, Bin Cheng, Yongfa Zheng
In the present study, a chitosan derivative with long chain quaternary ammonium locating grafted at 6-OH (CTS-6-QAS) was designed and prepared via a novel click reaction. The structure and thermal stability of the products of each step were determined with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Rheological tests indicate that CTS-6-QAS possesses excellent thermally induced hydrogel formation property in the presence of β-glycerophosphate (β-GP)...
July 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28725868/physico-mechanical-thermal-and-morphological-properties-of-furfuryl-alcohol-2-ethylhexyl-methacrylate-halloysite-nanoclay-wood-polymer-nanocomposites-wpncs
#7
Md Rezaur Rahman, Sinin Hamdan, Josephine Chang Hui Lai, Mohammad Jawaid, Fahmi Asyadi Bin Md Yusof
In this study, the physical, morphological, mechanical and thermal properties of furfuryl alcohol/2-ethylhexyl methacrylate/halloysite nanoclay wood polymer nanocomposites (FA-co-EHMA-HNC WPNCs) were investigated. FA-co-EHMA-HNC WPNCs were prepared via an impregnation method and the properties of the nanocomposites were characterized through the weight percent gain, Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), three-point flexural test, dynamic mechanical thermal analysis (DMTA), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) analysis and moisture absorption test...
July 2017: Heliyon
https://www.readbyqxmd.com/read/28724328/smart-tetrazole-based-antibacterial-nanoparticles-as-multifunctional-drug-carriers-for-cancer-combination-therapy
#8
Elham Zakerzadeh, Roya Salehi, Mehrdad Mahkam
Due to multidrug resistance of cancer tissues and immune-suppression of cancerous patients during chemotherapy in one hand and the use of tetrazole derivatives in medicine because of its anticancer, antifungal and antiviral properties, on the other, we were encouraged to design novel smart antibacterial nanocomposites-based polymer of tetrazole as dual anticancer drug delivery systems. The structures of nanocomposites characterized by FTIR, (1)H NMR, FESEM-EDX and TGA analyses and antibacterial activity of smart carriers were evaluated by determination of minimum inhibitory concentration (MIC) values against some bacteria and fungi...
July 20, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28722040/a-new-set-of-cd-ii-coordination-polymers-with-mixed-ligands-of-dicarboxylate-and-pyridyl-substituted-diaminotriazine-selective-sorption-towards-co2-and-cationic-dyes
#9
Santanu Chand, Syed Meheboob Elahi, Arun Pal, Madhab C Das
On the basis of a mixed ligand system of L(NH2)2 (6-(pyridin-4-yl)-1,3,5-triazine-2,4-diamine) and dicarboxylic acids, three new Cd(ii) coordination polymers viz. {[Cd0.5(tdc)0.5(L(NH2)2)0.5(H2O)]·DMF·H2O}n (1), {[Cd0.5(bdc)0.5(L(NH2)2)(H2O)]·DMF·H2O}n (2), and {[Cd(ipa)(L(NH2)2)(DMF)]·H2O}n (3) (tdcH2 = thiophene-2,5-dicarboxylic acid, bdcH2 = benzene-1,4-dicarboxylic acid, ipaH2 = benzene-1,3-dicarboxylic acid) were synthesized under diverse reaction conditions and characterized by single crystal X-ray diffraction, PXRD, elemental analysis, IR spectroscopy and TGA...
July 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28719186/elastomer-reinforced-with-regenerated-chitin-from-alkaline-urea-aqueous-system
#10
Peng Yu, Hui He, Yuanfang Luo, Demin Jia, Alain Dufresne
Novel hybrid elastomer/regenerated chitin (R-chitin) composites were developed, for the first time, by introducing chitin solution (dissolved in alkaline/urea aqueous solution at low temperature) into rubber latex, and then co-coagulating using ethanol as the co-coagulant. During the rapid co-precipitation process, the chitin solution showed rapid coagulant-induced gelation and a porous chitin phase was generated, while the rubber latex particles were synchronously demulsificated to form the rubbery phase. The two phases interlaced and interpenetrated simultaneously to form an Interpenetrating Polymer Network (IPN) structure, which was evidenced by SEM observation...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28718469/characterization-of-the-thermal-thermal-oxidative-stability-of-fluorinated-graphene-with-various-structures
#11
Wenchuan Lai, Dazhou Xu, Xu Wang, Zaoming Wang, Yang Liu, Xiaojiao Zhang, Xiangyang Liu
Considering practical applications, the thermal/thermal oxidative stability of fluorinated graphene should be given sufficient attention. Herein, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR) were used to investigate in detail the differences in the thermal stabilities of two types of fluorinated samples, fluorinated graphene (FG) and fluorinated porous graphene (FPG) with various fluorine contents, respectively, as well as the reasons for these differences...
July 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28715862/phenyl-and-ionic-liquid-based-bifunctional-periodic-mesoporous-organosilica-supported-copper-an-efficient-nanocatalyst-for-clean-production-of-polyhydroquinolines
#12
Dawood Elhamifar, Hakimeh Ardeshirfard
A novel phenyl and ionic liquid based bifunctional periodic mesoporous organosilica supported copper (Cu@BPMO-Ph-IL) is prepared, characterized and its catalytic application is developed in the clean production of polyhydroquinolines. The Cu@BPMO-Ph-IL was prepared via chemical grafting of ionic liquid groups onto phenyl-based PMO followed by treatment with copper acetate. This nanocatalyst was characterized with transmission electron microscopy (TEM), scanning electron microscopy (SEM), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs), thermal gravimetric analysis (TGA), powder X-ray diffraction (PXRD), nitrogen-sorption and energy dispersive X-ray (EDX) analyses...
July 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28711592/producing-amorphous-solid-dispersions-via-co-precipitation-and-spray-drying-impact-to-physicochemical-and-biopharmaceutical-properties
#13
Amanda K P Mann, Luke Schenck, Athanas Koynov, Alfred C F Rumondor, Xiaoling Jin, Melanie Marota, Chad Dalton
Many small molecule active pharmaceutical ingredients (APIs) exhibit low aqueous solubility, and benefit from generation of amorphous dispersions of the API and polymer to improve their dissolution properties. Spray drying and hot melt extrusion are two common methods to produce these dispersions; however, for some systems these approaches may not be optimal, and it would be beneficial to have an alternative route. Herein, amorphous solid dispersions of Compound A, a low solubility weak acid, and copovidone were made by conventional spray drying and co-precipitation...
July 12, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28711028/fluorescence-based-cdte-nanosensor-for-sensitive-detection-of-cytochrome-c
#14
Rehab M Amin, Souad A Elfeky, Thomas Verwanger, Barbara Krammer
Cytochrome c (Cyt c) is commonly used as intrinsic biomarker for several characteristics of the cell such as respiration, energy level and apoptosis. In the present study a simple colorimetric sensor should be developed and tested for the real-time detection of Cyt c in living cells. We synthesized cadmium telluride quantum dots (CdTe QDs) capped with thioglycolic acid (TGA) as a fluorometric Cyt c nanosensor. The synthesized TGA/CdTe QDs nanosensor was characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and absorption as well as fluorescence spectrophotometry...
July 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28710993/synthesis-physicochemical-and-optical-properties-of-bis-thiosemicarbazone-functionalized-graphene-oxide
#15
Santosh Kumar, Mohmmad Y Wani, Claudia T Arranja, Ricardo A E Castro, José A Paixão, Abilio J F N Sobral
Fluorescent materials are important for low-cost opto-electronic and biomedical sensor devices. In this study we present the synthesis and characterization of graphene modified with bis-thiosemicarbazone (BTS). This new material was characterized using Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible (UV-Vis) and Raman spectroscopy techniques. Further evaluation by X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and atomic-force microscopy (AFM) allowed us to fully characterize the morphology of the fabricated material...
July 1, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28710234/takotsubo-cardiomyopathy-and-transient-global-amnesia-a-shared-aetiology
#16
Jithin Sajeev, Anoop Koshy, Kevin Rajakariar, Gary Gordon
Takotsubo cardiomyopathy (TTC) is associated with acute, reversible left ventricular (LV) dysfunction, while transient global amnesia (TGA) is a reversible disorder of the brain characterised by anterograde amnesia. We report an unusual case of TTC occurring concurrently in a patient with TGA, and propose that catecholamine surge induced cerebral venous congestion and cardiotoxicity is the shared aetiology that leads to the concurrent manifestation of these conditions. TTC and TGA are reversible disorders that can occur concurrently in a subset of patients due to a unifying aetiology, catecholamine excess, leading to pathophysiological changes within the brain and the myocardium...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28709909/pemetrexed-conjugated-with-gold-nanoparticles-synthesis-characterization-and-a-study-of-noncovalent-interactions
#17
Elżbieta U Stolarczyk, Krzysztof Stolarczyk, Marta Łaszcz, Marek Kubiszewski, Andrzej Leś, Olga Michalak
Gold nanoparticles (AuNPs) have been widely used as nanocarriers in drug delivery application. However, the binding mechanism between AuNPs and drug bases still remains a puzzle. Our study included: (i) optimization of three synthesis of the AuNPs-pemetrexed (PE) nanocomposites formation which was monitored by UV-Vis spectroscopy, (ii) identification of PE in gold nanocomposites and mechanism of PE interaction with gold nanoparticles by electrochemistry, NMR and Raman measurements, (iii) characterization of the three nanocomposites by TEM, DSL, ESL, zeta potential, XRPD and TGA analysis...
July 11, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28709883/pyrolysis-characteristics-and-kinetics-of-microalgae-via-thermogravimetric-analysis-tga-a-state-of-the-art-review
#18
REVIEW
Quang-Vu Bach, Wei-Hsin Chen
Pyrolysis is a promising route for biofuels production from microalgae at moderate temperatures (400-600°C) in an inert atmosphere. Depending on the operating conditions, pyrolysis can produce biochar and/or bio-oil. In practice, knowledge for thermal decomposition characteristics and kinetics of microalgae during pyrolysis is essential for pyrolyzer design and pyrolysis optimization. Recently, the pyrolysis kinetics of microalgae has become a crucial topic and received increasing interest from researchers...
June 19, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28709661/left-sided-reoperations-after-arterial-switch-operation-a-european-multicenter-study
#19
Vladimiro L Vida, Lorenza Zanotto, Lucia Zanotto, Giovanni Stellin, Massimo Padalino, Georges Sarris, Eleftherios Protopapas, Carol Prospero, Christian Pizarro, Edward Woodford, Thomas Tlaskal, Hakan Berggren, Martin Kostolny, Ikenna Omeje, Boulos Asfour, Alexander Kadner, Thierry Carrel, Paul H Schoof, Matej Nosal, Josè Fragata, Michał Kozłowski, Bohdan Maruszewski, Luca A Vricella, Duke E Cameron, Vladimir Sojak, Mark Hazekamp, Jukka Salminen, Ilkka P Mattila, Julie Cleuziou, Patrick O Myers, Viktor Hraska
BACKGROUND: We sought to report the frequency, types, and outcomes of left-sided reoperations (LSRs) after an arterial switch operation (ASO) for patients with D-transposition of the great arteries (D-TGA) and double-outlet right ventricle (DORV) TGA-type. METHODS: Seventeen centers belonging to the European Congenital Heart Surgeons Association (ECHSA) contributed to data collection. We included 111 patients who underwent LSRs after 7,951 ASOs (1.4%) between January 1975 and December 2010...
July 11, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28708982/green-synthesis-of-graphene-from-recycled-pet-bottle-wastes-for-use-in-the-adsorption-of-dyes-in-aqueous-solution
#20
Noha A El Essawy, Safa M Ali, Hassan A Farag, Abdelaziz H Konsowa, Mohamed Elnouby, Hesham A Hamad
Polyethyleneterephthalate (PET) is an important component of post-consumer plastic waste. This study focuses on the potential of utilizing "waste-treats-waste" by synthesis of graphene using PET bottle waste as a source material. The synthesized graphene is characterized by SEM, TEM, BET, Raman, TGA, and FT-IR. The adsorption of methylene blue (MB) and acid blue 25 (AB25) by graphene is studied and parameters such as contact time, adsorbent dosage were optimized. The Response Surface Methodology (RSM) is applied to investigate the effect of three variables (dye concentration, time and temperature) and their interaction on the removal efficiency...
July 11, 2017: Ecotoxicology and Environmental Safety
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