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https://www.readbyqxmd.com/read/29161651/enhanced-anticancer-effect-of-fabricated-gallic-acid-cds-on-the-rgo-nanosheets-on-human-glomerular-mesangial-ip15-and-epithelial-proximal-hk2-kidney-cell-lines-cytotoxicity-investigations
#1
Wei Peng, Pengcheng Luo, Dingwen Gui, Weidong Jiang, Haixia Wu, Jie Zhang
In spite of the technological innovation in the biomedical science, cancer remains a critical disease. In this study, we designed a gallic acid/cadmium sulfide (GA/CdS) nanocomposite fabricated on the reduced graphene oxide (GA/CdS-rGO) nanosheets for the treatment system of human kidney cancer cells. The GA/CdS-rGO nanosheets have been prepared using gallic acid as a reducing agent. The characterization of nanocomposites was studied using UV-Vis spectroscope, FT-IR, XRD, SEM and TEM. The microscopic images showed the spherical shape and nano-scaled CdS nanoparticles on the sheet like rGO nanomaterials...
November 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29161646/antimicrobial-colloidal-hydrogels-assembled-by-graphene-oxide-and-thermo-sensitive-nanogels-for-cell-encapsulation
#2
Wenhua Cheng, Yunhua Chen, Lijing Teng, Bingheng Lu, Li Ren, Yingjun Wang
Hydrogels are promising 3D materials that have demonstrated increasing applications in the encapsulation and delivery of drugs and cells. Herein we report an injectable colloidal hydrogel that directly assembled by graphene oxide (GO) and thermo-sensitive nanogels (tNG). The pH dependent hydrogen bonding interactions between the carboxyl and oxethyl groups induce the reversible assembly of GO and nanogels. The hydrogel is mouldable and can be shaped into different macroscopic objects, and the mechanical strengths are tunable with pH and temperature adjustment...
November 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29160956/photosensitization-of-molecular-oxygen-on-graphene-oxide-for-ultrasensitive-signal-amplification
#3
Xinfeng Zhang, Li Deng, Chengpeng Huang, Jinyi Zhang, Xiandeng Hou, Peng Wu, Juewen Liu
H2O2 and horseradish peroxidase (HRP) are commonly used together in bioassays. HRP is required to accelerate the reaction between a chromogenic substrate (e.g., 3,3',5,5'-tetramethylbenzidine, TMB) and H2O2 and thus amplifies the signal. We herein explore molecular oxygen for enzyme-free and H2O2-free oxidation, while still using the same colorimetric reaction. Restricted by spin selection rules, the ground-state triplet oxygen needs to be converted to the singlet state to oxide TMB. We used phloxine B (PB) as the photosensitizer for its excellent performance and safety...
November 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29160836/an-in-vitro-study-of-the-photodynamic-effectiveness-of-go-ag-nanocomposites-against-human-breast-cancer-cells
#4
Fozia Shaheen, Muhammad Hammad Aziz, Muhammad Fakhar-E-Alam, Muhammad Atif, Mahvish Fatima, Riaz Ahmad, Atif Hanif, Saqib Anwar, Fatima Zafar, Ghazanfar Abbas, Syed Mansoor Ali, Mukhtar Ahmed
Graphene-based materials have garnered significant attention because of their versatile bioapplications and extraordinary properties. Graphene oxide (GO) is an extremely oxidized form of graphene accompanied by the functional groups of oxygen on its surface. GO is an outstanding platform on which to pacify silver nanoparticles (Ag NPs), which gives rise to the graphene oxide-silver nanoparticle (GO-Ag) nanocomposite. In this experimental study, the toxicity of graphene oxide-silver (GO-Ag) nanocomposites was assessed in an in vitro human breast cancer model to optimize the parameters of photodynamic therapy...
November 21, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29160714/understanding-aqueous-stability-and-filtration-capability-of-mos2-membranes
#5
Zhongying Wang, Qingsong Tu, Sunxiang Zheng, Jeffrey J Urban, Shaofan Li, Baoxia Mi
Membranes made of layer-stacked two-dimensional molybdenum disulfide (MoS2) nanosheets have recently shown great promise for water filtration. At present, the reported water fluxes vary significantly while the accountable structure and properties of MoS2 nanochannels are largely unknown. This paper aims to mechanistically relate the performance of MoS2 membranes to the size of their nanochannels in different hydration states. We discovered that fully hydrated MoS2 membranes retained a 1.2-nm interlayer spacing (or 0...
November 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/29160685/graphene-oxide-a-new-carrier-for-slow-release-of-plant-micronutrients
#6
Shervin Kabiri, Fien Degryse, Diana N H Tran, Rodrigo da Silva, Michael J McLaughlin, Dusan Losic
The environmental problems and low efficiency associated with conventional fertilizers provides an impetus to develop advanced fertilizers with slower release and better performances. Here we report of development of a new carrier platform based on graphene oxide (GO) sheets that can provide a high loading of plant micronutrients with controllable slow release. To prove this concept two micronutrients zinc (Zn) and copper (Cu) were used to load on GO sheets and hence formulate GO-based micronutrients fertilizer...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29159144/thermoresponsive-graphene-oxide-starch-micro-nanohydrogel-composite-as-biocompatible-drug-delivery-system
#7
Mina Sattari, Marziyeh Fathi, Mansour Daei, Hamid Erfan-Niya, Jaleh Barar, Ali Akbar Entezami
Introduction: Stimuli-responsive hydrogels, which indicate a significant response to the environmental change (e.g., pH, temperature, light, …), have potential applications for tissue engineering, drug delivery systems, cell therapy, artificial muscles, biosensors, etc. Among the temperature-responsive materials, poly (N-isopropylacrylamide) (PNIPAAm) based hydrogels have been widely developed and their properties can be easily tailored by manipulating the properties of the hydrogel and the composite material...
2017: BioImpacts: BI
https://www.readbyqxmd.com/read/29158525/photoacoustic-stimulation-promotes-the-osteogenic-differentiation-of-bone-mesenchymal-stem-cells-to-enhance-the-repair-of-bone-defect
#8
Zebin Huang, Jiankun Xu, Jiebin Chen, Hongjiang Chen, Hailong Wang, Zhonglian Huang, Youbin Chen, Xiaolin Lu, Fushen Lu, Jun Hu
The aim of this study was to evaluate the direct photoacoustic (PA) effect on bone marrow mesenchymal stem cells (BMSCs) which is a key cell source for osteogenesis. As scaffold is also an indispensable element for tissue regeneration, here we firstly fabricated a composited sheet using polylactic-co-glycolic acid (PLGA) mixing with graphene oxide (GO). BMSCs were seeded on the PLGA-GO sheets and received PA treatment in vitro for 3, 9 and 15 days, respectively. Then the BMSCs were harvested and subjected to assess alkaline phosphatase (ALP) activity, calcium content and osteopontin (OPN) on 3, 9 and 15 days...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29156408/label-free-electrochemical-dna-biosensor-for-guanine-and-adenine-by-ds-dna-poly-l-cysteine-fe3o4-nanoparticles-graphene-oxide-nanocomposite-modified-electrode
#9
Majid Arvand, Mona Sanayeei, Shiva Hemmati
In this study, we aim to design a simple and effective electrochemical DNA biosensor based on a carbon paste electrode modified with ds-DNA/poly(L-cysteine)/Fe3O4 nanoparticles-graphene oxide (ds-DNA/p(L-Cys)/Fe3O4 NPs-GO/CPE) for sensitive detection of adenine (A) and guanine (G). The electrocatalytic oxidation of A and G on the electrode was explored by differential pulse voltammetry (DPV) and cyclic voltammetry (CV). This sensor shows separated and well-defined peaks for A and G, by which one can determine these biological bases individually or simultaneously...
November 7, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29156406/target-catalyzed-hairpin-assembly-and-metal-organic-frameworks-mediated-nonenzymatic-co-reaction-for-multiple-signal-amplification-detection-of-mir-122-in-human-serum
#10
Yuliang Li, Chao Yu, Bo Yang, Zhirui Liu, Peiyuan Xia, Qian Wang
Herein, a new type of multifunctional iron based metal-organic frameworks (PdNPs@Fe-MOFs) has been synthesized by assembly palladium nanoparticles on the surface of Fe-MIL-88NH2 MOFs microcrystals, and first applied in electrochemical biosensor for ultrasensitive detection of microRNA-122 (miR-122, a biomarker of drug-induced liver injury). The nanohybrids have not only been utilized as ideal nanocarriers for immobilization of signal probes, but also used as redox probes and electrocatalysts. In this biosensor, two hairpin probes were designed as capture probes and signal probes, respectively...
November 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29156237/skeleton-skin-structured-rgo-cnts-pani-composite-fiber-electrodes-with-excellent-mechanical-and-electrochemical-performance-for-all-solid-state-symmetric-supercapacitors
#11
Dong Liu, Pengcheng Du, Wenli Wei, Hongxing Wang, Qi Wang, Peng Liu
Polyaniline coated reduced graphene oxide/carbon nanotube composite fibers ((RGO/CNTs)@PANI, RCP) with skeleton/skin structure are designed as fiber-shaped electrodes for high performance all-solid-state symmetric supercapacitor. The one-dimensional reduced graphene oxide/carbon nanotube composite fibers (RGO/CNTs, RC) are prepared via a simple in-situ reduction of graphene oxide in presence of carbon nanotubes in quartz glass pipes, which exhibit excellent mechanical performance of >193.4 MPa of tensile strength...
November 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29156130/theoretical-and-experimental-evidence-for-the-carbon-oxygen-group-enhancement-of-no-reduction
#12
Jinyang Li, Yirui Wang, Jia Song, Qi Gao, Jia Zhang, Jingyi Zhang, Dong Zhai, Jizhi Zhou, Qiang Liu, Zhi Ping Xu, Guangren Qian, Yi Liu
The relation between a catalytic center and the surrounding carbon-oxygen groups influences the catalytic activity in various reactions. However, the impact of this relation on catalysis is usually discussed separately. For the first time, we proved that carbon-oxygen groups increased the reducibility of Fe-C bonds toward NO reduction. Experimentally, we compared the reductive activities of materials with either one or both factors, i.e., carbon-oxygen groups and Fe-C bonds. As a result, graphene oxide-supported Fe (with both factors) showed the best activity, duration of activity and selectivity...
November 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29156126/two-dimensional-tantalum-carbide-mxenes-composite-nanosheets-for-multiple-imaging-guided-photothermal-tumor-ablation
#13
Chen Dai, Yu Chen, Xiangxiang Jing, Lihua Xiang, Dayang Yang, Han Lin, Zhuang Liu, Xiaoxia Han, Rong Wu
MXenes, an emerging family of graphene-analogues two-dimensional (2D) materials, have attracted continuous and tremendous attentions in many application fields because of their intrinsic physiochemical properties and high performance in versatile applications. In this work, we report on the construction of tantalum carbide (Ta4C3) MXene-based composite nanosheets for multiple imaging-guided photothermal tumor ablation, which has been achieved by rational choice of the composition of MXenes and their surface functionalization...
November 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/29155914/the-surface-plasmon-resonance-thermal-support-and-size-effect-induced-photocatalytic-activity-enhancement-of-au-reduced-graphene-oxide-for-selective-oxidation-of-benzylic-alcohols
#14
Yanhui Zhang, Hongxu Guo, Wen Weng, Ming-Lai Fu
Reduced graphene oxide (RGO) as an electron-conductive medium and photosensitizer have been widely used to construct efficient RGO/semiconductor photocatalysts for solar energy conversion; however, the role of RGO has been largely underestimated. Herein, the surface plasmon resonance (SPR) effect, thermal effect, support effect, and size effect of Au/RGO are demonstrated to play important roles in enhancing the photocatalytic activity, which has not been considered previously. Au/RGO nanocomposites, synthesized via a facile wet chemistry route, exhibit an excellent visible light photocatalytic performance for selective oxidation of benzylic alcohols...
November 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29155391/facile-synthesis-of-reduced-graphene-oxide-trimethyl-chlorosilane-coated-cellulose-nanofibres-aerogel-for-oil-absorption
#15
Zhaoyang Xu, Huan Zhou, Xiangdong Jiang, Jianyu Li, Fang Huang
A hydrophobic and oleophilic trimethyl chlorosilane/reduced graphene oxide-coated cellulose nanofibres (TMCS/rGO/CNFs) aerogel with a three-dimensional structure was fabricated through a facile dip-coating process. The prepared aerogel exhibited several advantageous properties for absorption and expulsion of oils from water surfaces, such as a high specific surface area, low density (6.78 mg/cm(3)) and good porosity (99.12%). In addition, the TMCS/rGO/CNFs aerogel demonstrated good absorption capacities up to 39 times its own weight over a short time (1...
December 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29155336/evaluation-of-the-combined-effect-of-nir-laser-and-ionizing-radiation-on-cellular-damages-induced-by-iudr-loaded-plga-coated-nano-graphene-oxide
#16
Samira Kargar, Samideh Khoei, Sepideh Khoee, Sakine Shirvalilou, Seied Rabi Mahdavi
Glioma is one of the most common malignant cancers of the central nervous system (CNS). Radiatherapy and chemotherapy may be used to slow the growth of tumors that cannot be removed with surgery. The current study developed a combination therapy tool using Nanographene oxide (NGO) functionalized with poly lactic-co-glycolic acid (PLGA) as a carrier of 5-iodo-2-deoxyuridine (IUdR) for glioma cancer treatment. U87MG cells were treated in different groups with IUdR, PLGA-coated Nanographene oxide (PLGA-NGO), IUdR-loaded PLGA-coated Nanographene oxide (IUdR-PLGA-NGO), 2Gy 6MV X-ray radiation, and near-infrared region (NIR) laser radiation...
November 16, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29154877/investigation-the-effect-of-graphene-oxide-and-gelatin-starch-weight-ratio-on-the-properties-of-starch-gelatin-go-nanocomposite-films-the-rsm-study
#17
Shima Afshar, Hossein Banisadi
In this study, we reported the design and fabrication of starch/gelatin/graphene oxide biodegradable nanocomposite films with proper potential for food packaging applications. The experiments were designed using Design Expert software via RSM by defining gelatin/starch weight ratio (G/S wt. ratio) and graphene oxide (GO) wt.% as process parameters affecting on the properties of the prepared films. The optimization was done and various properties of the optimum film were investigated. The XRD and SEM images confirmed that GO layers could intercalate in the starch/gelatin matrix and proper dispersion of nanofillers in the matrix obtained via solution casting method...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29154874/preparation-and-characterization-of-three-dimensional-scaffolds-based-on-hydroxypropyl-chitosan-graft-graphene-oxide
#18
P R Sivashankari, A Moorthi, K Mohamed Abudhahir, M Prabaharan
Hydroxypropyl chitosan (HPCH), a water soluble derivative of chitosan, is widely considered for tissue engineering and wound healing applications due to its biocompatibility and biodegradability. Graphene oxide (GO) is a carbon-based nanomaterial which is capable of imparting desired properties to the scaffolds. Hence, the integration of GO into HPCH could allow for the production of HPCH-based scaffolds with improved swelling character, mechanical strength, and stability aimed at being used in tissue engineering...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29154531/study-of-graphene-oxide-structural-features-for-catalytic-antibacterial-gas-sensing-and-metals-decontamination-environmental-applications
#19
Shamaila Sajjad, Sajjad Ahmed Khan Leghari, Anum Iqbal
This study represents a comprehensive review about the structural features of graphene oxide (GO) and its significance in environmental applications. Two Dimensional (2D) GO is tremendously focused in advanced carbon based nanomaterial for environmental applications due to its tunable physicochemical characteristics. Herein, we report foundational structural models of GO and explore the chemical bonding of oxygen moieties with graphite basal plane using various characterization tools. Moreover, the impact of these oxygen moieties and morphology of GO for the environmental applications such as removal of metal ions, catalytic, antibacterial and gas sensing abilities has here been critically reviewed for the first time...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29153971/new-insights-into-bisphenols-removal-by-nitrogen-rich-nanocarbons-synergistic-effect-between-adsorption-and-oxidative-degradation
#20
Peiyuan Xiao, Pei Wang, Huimin Li, Qiuyun Li, Yanpeng Shi, Xi-Lin Wu, Hongjun Lin, Jianrong Chen, Xiangke Wang
In this work, nitrogen-rich graphene-like carbon sheets (N-GLCS) with high specific surface area (488.4m(2)/g), narrow pore distribution and high N-doping (18.4 at%) were prepared and applied as both adsorbent and catalyst for the removal of bisphenols. Adsorption experiments demonstrated the high adsorption capacities of the N-GLCS toward bisphenol F (BPF) (222.9mg/g), bisphenol A (BPA) (317.8mg/g), and bisphenol C (BPC) (540.4mg/g). Results showed that about 98.6% of BPA (70mg/L) was removed at pH 7.0 within 80min after the adsorption-catalytic degradation process...
November 7, 2017: Journal of Hazardous Materials
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