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Methylene blue

Shima Rahim Pouran, Abolfazl Bayrami, Mohammad Saleh Shafeeyan, Abdul Aziz Abdul Raman, Wan Mohd Ashri Wan Daud
Oxidative treatment of a cationic dye solution, methylene blue, was investigated using magnetite nanoparticles and goethite in heterogeneous Fenton-like reaction, and ferrous ions in homogeneous Fenton-reaction. The aim was to compare the degradation efficiencies of the studied catalysts for decolorization of methylene blue solution as the model organic pollutant. Response surface methodology (RSM) was applied to determine the optimal operational conditions for magnetite/H2O2 and goethite/H2O2 systems. The [H2O2] of 0...
March 2018: Acta Chimica Slovenica
Li Wan, Hongyuan Song, Junhao Ma, Yuan Ren, Xiaowei Cheng, Jiacan Su, Qin Yue, Yonghui Deng
Iron oxide materials have wide applications due to their special physicochemical properties; however, it is a great challenge to synthesize mesoporous iron oxide based microspheres conveniently and controllably with high surface area, large pore volume and interconnected porous structures. Herein, mesoporous α-Fe2O3 based microspheres with high porosity are synthesized via a facile polymerization induced colloid assembly (PICA) method through polymerization of urea-formaldehyde resin (UF resin) and its simultaneously cooperative assembly with Fe(OH)3 colloids in aqueous solution, followed with subsequent thermal treatment...
March 21, 2018: ACS Applied Materials & Interfaces
Caroline F Baldo, Daniel Almeida, Erin Wendt-Hornickle, Alonso Guedes
OBJECTIVE: To describe a single-site transversus abdominis plane (TAP) block technique in horses. STUDY DESIGN: Prospective, descriptive, experimental anatomical study. ANIMALS: Four adult pony cadavers. METHODS: Freshly euthanized ponies were positioned in dorsal recumbency. A 6-13 MHz linear ultrasonic probe was used to scan the abdominal wall bilaterally midway between the last rib and iliac crest in search of the TAP location...
February 7, 2018: Veterinary Anaesthesia and Analgesia
Manuel Luna, Juan J Delgado, M L Almoraima Gil, María J Mosquera
The high pollution levels in our cities are producing a significant increase of dust on buildings. An application of photoactive coatings on building materials can produce buildings with self-cleaning surfaces. In this study, we have developed a simple sol-gel route for producing Au-TiO₂/SiO₂ photocatalysts with application on buildings. The gold nanoparticles (AuNPs) improved the TiO₂ photoactivity under solar radiation because they promoted absorption in the visible range. We varied the content of AuNPs in the sols under study, in order to investigate their effect on self-cleaning properties...
March 20, 2018: Nanomaterials
Ying-Hua Zhao, Shi-Jian Zhang, Zi-Hui Yang, Xiao-Chang Liu, De-Lin Lei, Jing Li, Lei Wang
Distraction osteogenesis is an important technique for the treatment of maxillofacial abnormities and defects. However, distraction osteogenesis may cause the injury of the inferior alveolar nerve. The relationship between distraction rate and nerve degeneration-regeneration shift remains poorly understood. In this study, 24 rabbits were randomly divided into four groups. To establish the rabbit mandibular distraction osteogenesis model, the mandibles of rabbits in distraction osteogenesis groups were subjected to continuous osteogenesis distraction at a rate of 1...
February 2018: Neural Regeneration Research
Burak Yücel, Emine Demirel, Sefa Kelekci, Osama Shawki
It has been realised that rhythmic peristalsis of the ostia and tubes can be observed during hysteroscopy. The aim of this study was to examine the presence of tubal peristaltic dysfunction in unexplained infertility (UI). Hysteroscopy was performed in 35 women with UI and in 37 healthy fertile women. Bilateral tubal peristalses were assessed hysteroscopically by the observation of methylene blue injection and its transport to the Fallopian tubes. Tubal patency was evaluated with laparoscopic chromopertubation...
March 20, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
Wei-Dong Lü, Rui-Fang Sun, Ye-Rong Hu, Jan-Rong Lu, Lu Gu, Zhi-Gang Liu, Guang-Yan Lei, Zhun Qiang, Lin Cai
Acellular tumor extracellular matrices (ECMs) have limitations when employed as three-dimensional scaffolds for tumor engineering. In this work, methylene blue-mediated photooxidation was used to crosslink acellular tumor ECMs. Photooxidative crosslinking greatly increased the stiffness of acellular tumor ECM scaffolds but barely altered the Amide III band of the secondary structure of polypeptides and proteins. MCF-7, HepG2 and A549 cells cultured on photooxidatively crosslinked acellular tumor ECM scaffolds exhibited greater cell number per scaffold, more IL-8 and VEGF secretion, and increase migration and invasion abilities than cells cultured on uncrosslinked acellular tumor ECM scaffolds...
March 16, 2018: Acta Biomaterialia
Mohammad Eghbali-Arani, Ali Sobhani-Nasab, Mehdi Rahimi-Nasrabadi, Farhad Ahmadi, Saeid Pourmasoud
YbVO4 nanostructure and YbVO4 /CuWO4 nanocomposites were successfully synthesized using sonochemical method, for the first time. In this disquisition, we tried to compare various parameters and reaction conditions on size, morphology, and uniformity of as-obtained samples. To reach optimum condition, some parameters including time, power, temperature, and solvent were investigated. The structural, morphological, optical, and magnetic properties of as-obtained products were characterized by some techniques such as FT-IR, XRD, EDS, SEM, TEM, UV-Vis, and VSM...
May 2018: Ultrasonics Sonochemistry
Dongsheng Zhang, Weixiang Li, Zhanfang Ma
An improved sandwich-type electrochemical immunosensor based on the novel signal amplification strategy was developed. Methylene blue (MB) loaded mesoporous silica nanoparticles (MSN) with polydopamine coating (PDA) were employed as "smart" labels, while phytic acid doped polyaniline hydrogel (PANI) with high adsorption capacity was acted as substrate. In this strategy, amount of redox species (MB) encapsulated in MSN by PDA will be released under acidic condition and then absorbed stably by PANI...
March 13, 2018: Biosensors & Bioelectronics
Nazar Ileri Ercan, Pieter Stroeve, Joseph W Tringe, Roland Faller
We present a coarse-grained MARTINI model for methylene blue (MB) and investigate the interactions of MB with dioleylphosphatidylcholine (DOPC) lipid bilayers by molecular dynamics simulations. Our results show that the charge state of MB and the oxidation degree of the DOPC bilayer play critical roles on membrane properties. Oxidation of the DOPC bilayer significantly increases permeability of water and MB molecules irrespective of the charge state of MB. The most significant changes in membrane properties are obtained for peroxidized lipid bilayers in the presence of cationic MB, with ~11% increase in membrane area per lipid head group and ~7% and 44% reduction in membrane thickness and lateral diffusivity, respectively...
March 19, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Chang-Gu Lee, Hassan Javed, Danning Zhang, Jae-Hong Kim, Paul Westerhoff, Qilin Li, Pedro J J Alvarez
Using a bi-polymer system consisting of polyvinylpyrrolidone (PVP) and poly(vinylidene fluoride) (PVDF), P25-TiO2 was immobilized into thin film mats of porous electrospun fibers. Pores were introduced by dissolving sacrificial PVP to increase surface area and enhance access to TiO2. The highest photocatalytic activity was achieved using a PVDF:PVP weight ratio of 2:1. Methylene blue (MB) was used to visualize contaminant removal, assess the sorption capacity (5.93 ± 0.23 mg/g) and demonstrate stable removal kinetics (kMB > 0...
March 19, 2018: Environmental Science & Technology
Chu Shan Tan, Mun Fei Yam
Previous studies have demonstrated that 3'-hydroxy-5,6,7,4'-tetramethoxyflavone (TMF) content in Orthosiphon stamineus fractions correlate with its vasorelaxation activity. Even with the availability of previous studies, there is still very little information on the vasorelaxation effect of TMF, and few scientific studies have been carried out. Therefore, the present study was designed to investigate the vasorelaxation activity and mechanism of action of the TMF. The vasorelaxation activity and the underlying mechanisms of TMF were evaluated on thoracic aortic rings isolated from Sprague Dawley rats...
March 19, 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
Masoud Erfani, Vahid Javanbakht
In this study, the removal of Methylene Blue dye was investigated by biocomposite beads synthesized from sodium alginate and wastes of oil extraction from almond peanut. Prepared biocomposite was characterized using X-ray diffraction, Infrared spectroscopy, scanning electron microscopy, Energy Dispersive X-Ray analysis. The adsorption capacities of Methylene Blue were investigated with respect to the effect of the adsorbent amount, pH value, and initial dye concentration. The kinetic adsorption data were analyzed by the pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion kinetic models...
March 14, 2018: International Journal of Biological Macromolecules
Song Cheng, Libo Zhang, Aiyuan Ma, Hongying Xia, Jinhui Peng, Chunyang Li, Jianhua Shu
The methylene blue (MB) removal abilities of raw activated carbon and iron/cerium modified raw activated carbon (Fe-Ce-AC) by adsorption were researched and compared. The characteristics of Fe-Ce-AC were examined by N2 adsorption, zeta potential measurement, FTIR, Raman, XRD, XPS, SEM and EDS. After modification, the following phenomena occurred: The BET surface area, average pore diameter and total pore volume decreased; the degree of graphitization also decreased. Moreover, the presence of Fe3 O4 led to Fe-Ce-AC having magnetic properties, which makes it easy to separate from dye wastewater in an external magnetic field and subsequently recycle...
March 2018: Journal of Environmental Sciences (China)
Yanfeng Wang, Wei Chen, Xiao Chen, Huajun Feng, Dongsheng Shen, Bin Huang, Yufeng Jia, Yuyang Zhou, Yuxiang Liang
CdS/MoS2 , an extremely efficient photocatalyst, has been extensively used in hydrogen photoproduction and pollutant degradation. CdS/MoS2 can be synthesized by a facile one-step hydrothermal process. However, the effect of the sulfur source on the synthesis of CdS/MoS2 via one-step hydrothermal methods has seldom been investigated. We report herein a series of one-step hydrothermal preparations of CdS/MoS2 using three different sulfur sources: thioacetamide, l-cysteine, and thiourea. The results revealed that the sulfur source strongly affected the crystallization, morphology, elemental composition and ultraviolet (UV)-visible-light-absorption ability of the CdS/MoS2 ...
March 2018: Journal of Environmental Sciences (China)
Xueqin Bao, Zhen Qin, Tianshu Zhou, Jingjing Deng
In this work, the gold nanoparticles (Au-NPs) were in-situ generated on the surface of MnO2 nanosheets to form MnO2 /Au-NPs nanocomposite in a simple and cost-effective way. Multiple experiments were carried out to optimize the oxidation of basic dye (Methylene Blue (MB)), including the molar ratio of MnO2 to chloroauric acid (HAuCl4 ), the pH of the solution and the effect of initial material. Under the optimal condition, the highest degradation efficiency for MB achieved to 98.9% within 60 min, which was obviously better than commercial MnO2 powders (4...
March 2018: Journal of Environmental Sciences (China)
Weili Fan, Yu Qi, Ranran Wang, Chen Xu, Nana Zhao, Fu-Jian Xu
Photodynamic therapy plays an important role in cancer treatment. In this work, methylene blue (MB)-embedded calcium carbonate nanorods (CaCO3 -MB NRs) have been synthesized for pH-responsive photodynamic therapy and ultrasound imaging. The morphology of CaCO3 -MB NRs can be controlled by modulating the concentration of Na2 CO3 aqueous solution. The generation of effective reactive oxygen species (ROS) were confirmed by 1,3-diphenylisobenzofuran (DPBF) probe. Both photodynamic therapy performance and echogenic performance of CaCO3 -MB NRs were investigated to confirm the feasibility of CaCO3 -MB nanohybrids for ultrasound image-guided photodynamic therapy...
March 14, 2018: Science China. Life Sciences
Yan Zhan, Yingliang Liu, Hongru Zu, Yanxian Guo, Shuangshuang Wu, Haiyao Yang, Zhiming Liu, Bingfu Lei, Jianle Zhuang, Xuejie Zhang, Di Huang, Chaofan Hu
Different from their bulk counterparts, plasmonic molybdenum oxide nanomaterials display superior optical and electronic properties, but unfortunately, phase-controlled synthesis of molybdenum oxide nanomaterials with multifunctional performances still remains a challenge. To actualize this, a surfactant-free solvothermal strategy was proposed to fabricate molybdenum oxide nanomaterials with a tunable phase. Encouragingly, the as-prepared molybdenum dioxide nanoparticles (MoO2 NPs) exhibit intense near-infrared (NIR) absorption attributed to the localized surface plasmon resonance (LSPR) effect, which results in their application as a surface enhanced Raman scattering (SERS) substrate to detect trace amounts of molecular species including Rhodamine 6G (R6G), crystal violet (CV), IR-780 iodide (IR780) and methylene blue (MB)...
March 15, 2018: Nanoscale
Xingang Li, Youyi He, Hong Sui, Lin He
A new, simple one-step approach has been developed to synthesize lignin and lignin amine coated Fe₃O₄ nanoparticles. These nanoparticles (lignin magnetic nanoparticles (LMNPs) and lignin amine magnetic nanoparticles (LAMNPs)) are found to possess not only magnetic response but also pH-dependent adsorption behavior. Results show that the combination of lignin with nanoparticles increased the adsorption capacities 2-5 times higher than other traditional single lignin based adsorbents (211.42 mg/g for methylene blue (MB) by LMNPs and 176...
March 14, 2018: Nanomaterials
Tarun Mittal, Ashish Dey, Abhilash Nali, Sheikh Mohammad Taha Mustafa, Vinod K Malik
INTRODUCTION: Ischemia of the tip of the alimentary limb involving the gastrojejunostomy (GJ) is an unusual complication during Roux-en-Y gastric bypass (RYGB). Revision of the GJ may be needed to manage this complication. OBJECTIVES: We present a case of inadvertent perforation of the jejunum by a gastric calibration tube, which was recognized on the table and appropriate measures are then taken. Repair of this enterotomy however then led to ischemia of the tip of alimentary limb extending to a portion of the GJ anastomosis...
March 13, 2018: Obesity Surgery
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