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Xiangang Zhai, Jianping Gao, Ruinan Xue, Xiaoyang Xu, Luyao Wang, Qiang Tian, Yu Liu
Bi2 MoO6 /reduced graphene oxide (Bi2 MoO6 /rGO) composites were fabricated by a facile one-pot hydrothermal approach, in which Bi2 MoO6 nanosheets and rGO were simultaneously obtained. The structure and composition of the as-synthesized Bi2 MoO6 and Bi2 MoO6 /rGO materials were characterized via FT-IR, BET, TGA, XRD, TEM, SEM and XPS analyses, and the electrochemical performance of Bi2 MoO6 /rGO as an anode in a lithium-ion battery was investigated. Compared with pristine Bi2 MoO6 , the Bi2 MoO6 /rGO composites have higher capacities, better cycle stability and higher rates...
February 7, 2018: Journal of Colloid and Interface Science
Gopala R Bhadu, Jayesh C Chaudhari, Babulal Rebary, Rajesh Patidar, Divesh N Srivastava
The structure-property correlation in the Cu-TCNQ organometallic complex is very important for explaining its unusual electrical, optical and magnetic properties. Consequently several morphological studies and their correlation with the properties of these materials can be found in the literature, although no systematic study of various morphologies with growth conditions and their correlation has been reported to the best of our knowledge. Therefore in this manuscript the interconversion of various morphologies is reported using electron and probe microscopies...
February 13, 2018: Micron: the International Research and Review Journal for Microscopy
Jorge Luis Araújo Martins, Maria Denise Lopes, Fabiana Ferreira de Souza, Fabio Sossai Possebon, Gudrun Wibbelt, Katarina Jewgenow
The aim of this study was to investigate the impact of prolonged storage at 4 °C on survival of cat preantral follicles (PAFs) pre- and post-vitrification. Ovaries were obtained from 12 queens and transported at 4 ºC within 2-6 h. Parts of the ovaries were stored for an additional 24 h or 72 h. The ovarian cortex was dissected, analyzed for viability (neutral red - NR) and morphology (histology - HE and ultrastructural analysis by TEM) and vitrified. We used 2 mm biopsy punches to obtain equal size pieces as the experimental units...
February 19, 2018: Cryobiology
Matas Jakubauskas, Valdemaras Jotautas, Eligijus Poskus, Saulius Mikalauskas, Gintare Valeikaite-Tauginiene, Kestutis Strupas, Tomas Poskus
PURPOSE: Transanal endoscopic microsurgery (TEM) procedure could potentially influence the development of fecal incontinence later in life. The aim of our study was to assess long-term functional outcomes after TEM and to determine possible variables related to incontinence. METHODS: Patients, enrolled in a prospectively collected TEM operation database, were interviewed using a postal questionnaire. The questionnaire consisted of EuroQol (EQ)-5D-5L quality of life questionnaire, Wexner fecal incontinence grading scale, and additional questions about other perianal operations and obstetric history for women...
February 22, 2018: International Journal of Colorectal Disease
Justin C Ondry, Matthew R Hauwiller, A Paul Alivisatos
Using in-situ high resolution TEM, we study the structure and dynamics of well-defined edge dislocations in imperfectly attached PbTe nanocrystals. We identify that attachment of PbTe nanocrystals on both {100} and {110} facets give rise to b=a/2<110> edge dislocations. Based on the Burgers vector of individual dislocations, we can identify the glide plane of the dislocations. We observe that defects in particles attached on {100} facets have glide planes that quickly intersect the surface, and HRTEM movies show that the defects follow the glide plane to the surface...
February 22, 2018: ACS Nano
Jiantuo Zhao, Jinyu Zhang, Zhaoqi Hou, Kai Wu, Xiaobin Feng, Gang Liu, Jun Sun
In order to achieve desired mechanical properties of alloys by manipulating grain boundaries via solute decoration, it is of great significance to understand the underlying mechanisms of microstructural evolution and plastic deformation. In this work, nanocrystalline Cu-W alloyed films with W concentrations spanning from 0 to 40 at. % were prepared by using magnetron sputtering. Thermal stability (within the temperature range of 200 °C - 600 °C) and hardness of the films were investigated by using the X-ray diffraction, transmission electron microscope (TEM) and nanoindentation, respectively...
February 22, 2018: Nanotechnology
Amir Samani, Shahrzad Abdolmohammadi, Asieh Otaredi-Kashani
AIM AND OBJECTIVE: The xanthene (dibenzopyran) framework constitutes the core structure of many biologically active compounds, and they have been of interest because of their pharmacological activities like antiviral, antibacterial, and anti-inflammatory, and and CCR1 antagonist. As heterogeneous catalysts offer several advantages over homogeneous catalysts, the performance of reactions on the surface of nanosized heterogeneous salts has received a great deal of interest in recent years...
February 19, 2018: Combinatorial Chemistry & High Throughput Screening
Shao-Fei Zhang, Shaoyu Lü, Chunmei Gao, Jiandong Yang, Xiang Yan, Tao Li, Na Wen, Mengjie Huang, Mingzhu Liu
Thrombotic events affect many individuals in a number of ways, all of which can cause significant morbidity and mortality. Nattokinase (NK), as a novel thrombolytic drug, has been used for thrombolytic therapy. It not only possesses plasminogen activator activity, but also directly digests fibrin through limited proteolysis. However, it may undergo inactivation and denaturation in the harsh external environment. In this study, a multiarm-polyethylene glycol-polyglutamic acid peptide dendrimer was fabricated and used as a carrier for NK protection and delivery...
February 22, 2018: Journal of Biomedical Materials Research. Part A
Guoqiang Zhang, Lei Cai, Yanfeng Zhang, Yu Wei
BiOClxI1-x solid solutions with different bandgaps were synthesized by adjusting the initial Cl to I molar ratios via chemical precipitation method at room temperature. The structures, morphologies, and optical properties of the samples were characterized by XRD, XPS, Raman, SEM, TEM, and UV-vis, respectively. The photocatalytic experiments showed that the BiOCl0.9I0.1 sample totally decomposed a large concentration of 50 mg L-1 aqueous Rhodamine B (RhB) solution within 12 minutes under the visible light irradiation (λ>420nm), which is 11 times higher than that of pure BiOI...
February 22, 2018: Chemistry: a European Journal
Byung Dae Son, Jun Kyu Lee, Woo Young Yoon
Tungsten (W) was coated onto a silicon (Si) anode at the nanoscale via the physical vaporization deposition method (PVD) to enhance its electrochemical properties. The characteristics of the electrode were identified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis, and electron probe X-ray microanalysis. With the electrochemical property analysis, the first charge capacities of the W-coated and uncoated electrode cells were 2558 mAh g- 1 and 1912 mAh g- 1 , respectively...
February 21, 2018: Nanoscale Research Letters
Shruti Mishra, Nalini Sankararamakrishnan
Floating catalytic chemical vapor deposition technique was used for synthesizing carbon nanotubes (CNTs) using ferrocene in benzene as the hydrocarbon source. The functionalization of CNTs was carried out by oxidation followed by grafting of potassium iodide (KI) and mercaptoethanol (HS(CH2 )2 OH) ligands to produce iodide-grafted CNTs (CNT-I) and thiol-functionalized CNTs (CNT-SH), respectively. The resulting adsorbents have been thoroughly characterized by various techniques. Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) studies revealed the efficient grafting of the ligands...
February 21, 2018: Environmental Science and Pollution Research International
Ying Wu, Yiming Tang, Laisheng Li, Peihong Liu, Xukai Li, Weirui Chen, Ying Xue
HIGHLIGHTS Fe incorporation significantly accelerated the adsorption of CPX on MCM-41.Fe leaching can be ignored when pH was higher than 4.0.pH played an important role in CPX adsorption on Fe-MCM-41.Co-effect of CPX and metal cations on Fe-MCM-41 was investigated. Fe-MCM-41s with various molar ratios of silicon to iron (20, 40, 80, and 160) were prepared to investigate adsorption properties of ciprofloxacin hydrochloride (CPX) in aqueous solutions. Fe-MCM-41s were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption/desorption isotherms, and infrared spectroscopy (FT-IR)...
2018: Frontiers in Chemistry
James A Hutchinson, Kilian Weigand, Akinbami Adenugba, Katharina Kronenberg, Jan Haarer, Florian Zeman, Paloma Riquelme, Matthias Hornung, Norbert Ahrens, Hans J Schlitt, Edward K Geissler, Jens M Werner
Recent introduction of all-oral direct-acting antiviral (DAA) treatment has revolutionized care of patients with chronic hepatitis C virus (HCV) infection. Regrettably, the high cost of DAA treatment is burdensome for healthcare systems and may be prohibitive for some patients who would otherwise benefit. Understanding how patient-related factors influence individual responses to DAA treatment may lead to more efficient prescribing. In this observational study, patients with chronic HCV infection were comprehensively monitored by flow cytometry to identify pretreatment immunological variables that predicted HCV RNA negativity within 4 weeks of commencing DAA treatment...
2018: Frontiers in Immunology
Amelia Shoemark, Thomas Burgoyne, Robert Kwan, Mellisa Dixon, Mitali P Patel, Andrew V Rogers, Alexandros Onoufriadis, Juliet Scully, Farheen Daudvohra, Thomas Cullup, Michael R Loebinger, Robert Wilson, Eddie M K Chung, Andrew Bush, Hannah M Mitchison, Claire Hogg
In primary ciliary dyskinesia (PCD), motile ciliary dysfunction arises from ciliary defects usually confirmed by transmission electron microscopy (TEM). In 30% of patients, such as those with DNAH11 mutations, apparently normal ultrastructure makes diagnosis difficult. Genetic analysis supports diagnosis, but may not identify definitive causal variants. Electron tomography, an extension of TEM, produces three-dimensional ultrastructural ciliary models with superior resolution to TEM. Our hypothesis is that tomography using existing patient samples will enable visualisation of DNAH11- associated ultrastructural defects...
February 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Tsai-Mu Cheng, Hsueh-Liang Chu, Yi-Cheng Lee, Di-Yan Wang, Che-Chang Chang, Kuan-Lan Chung, Hung-Chi Yen, Chu-Wen Hsiao, Xi-Yu Pan, Tsung-Rong Kuo, Chia-Chun Chen
The glucose metabolism rate in cancer cells is a crucial piece of information for the cancer aggressiveness. A feasible method to monitor processes of oncogenic mutations has been demonstrated in this work. The fluorescent gold nanoclusters conjugated with glucose (glucose-AuNCs) were successfully synthesized as a cancer-targeting probe for glucose transporters (Gluts) overexpressed by U-87 MG cancer cells, which can be observed under confocal microscopy. The structural and optical characterizations of fluorescent glucose-AuNCs were confirmed by transmission electron microscope (TEM) and Fourier transform infrared spectroscopy (FTIR)...
February 21, 2018: Analytical Chemistry
Jaculin Raiza Anasdass, Pandian Kannaiyan, Raghunathan Raghavachary, Subash C B Gopinath, Yeng Chen
We present a biogenic method for the synthesis of palladium nanoparticle (PdNP)-modified by reducing graphene oxide sheets (rGO) in a one-pot strategy using Ficus carica fruit juice as the reducing agent. The synthesized material was well characterized by morphological and structural analyses, including, Ultraviolet-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Transmission Electron Microscopy (TEM) and Raman spectroscopy. The results revealed that the PdNP modified GO are spherical in shape and estimated to be a dimension of ~0...
2018: PloS One
Iwona Jóźwik, Agata Strojny-Nędza, Marcin Chmielewski, Katarzyna Pietrzak, Łukasz Kurpaska, Szymon Nosewicz
The performance of the present-day scanning electron microscopy (SEM) extends far beyond delivering electronic images of the surface topography. Oxide dispersion strengthened (ODS) steel is on of the most promising materials for the future nuclear fusion reactor because of its good radiation resistance, and higher operation temperature up to 750°C. The microstructure of ODS should not exceed tens of nm, therefore there is a strong need in a fast and reliable technique for their characterization. In this work, the results of low-kV SEM characterization of nanoprecipitates formed in the ODS matrix are presented...
February 21, 2018: Microscopy Research and Technique
Chun-Chih Hu, Gong-Her Wu, Tzu-En Hua, Oliver I Wagner, Ta-Jen Yen
We employ the model organism Caenorhabditis elegans to effectively study the toxicology of anatase and rutile phase titanium dioxide (TiO2) nanoparticles (NPs). The experimental results show that the nematode C. elegans can take up fluorescein isothiocyanate (FITC)-labeled TiO2 NPs and that both anatase and rutile TiO2 NPs can be detected in the cytoplasm of cultured primary neurons imaged by transmission electron microscopy (TEM). After TiO2 NPs exposure, these neurons also grow shorter axons, which may be related to the detected impeded worm locomotion behavior...
February 21, 2018: ACS Applied Materials & Interfaces
Natalie A O'Neill, Tianshu Zhang, Gheorghe Braileanu, Xiangfei Cheng, Alena Hershfeld, Wenji Sun, Keith A Reimann, Sia Dahi, Natalia Kubicki, Wessam Hassanein, Christopher Laird, Arielle Cimeno, Agnes M Azimzadeh, Richard N Pierson
Background: Inducible costimulator (ICOS) is rapidly upregulated with T-cell stimulation and may represent an escape pathway for T-cell costimulation in the setting of CD40/CD154 costimulation blockade. Induction treatment exhibited no efficacy in a primate renal allograft model, but rodent transplant models suggest that the addition of delayed ICOS/ICOS-L blockade may prolong allograft survival and prevent chronic rejection. Here, we ask whether ICOS-Ig treatment, timed to anticipate ICOS upregulation, prolongs NHP cardiac allograft survival or attenuates pathogenic alloimmunity...
February 2018: Transplantation Direct
Jingwen Huang, Xiangyu Zhang, Zhihao Wu, Yufeng Wu, Xiaojie Wu, Yunguang Wang, Hao Jiang, Jing Ma, Zelai He
(Arginine-Glycine-Aspartic)-methoxy polyethylene glycol-(1,2-distearoyl-sn-glycero-3-phosphoethanolaMine-N) (abbreviation: RGD-PEG2000-DSPE or RGD-PD) was successfully synthesized and verified by 1H-NMR and MALDI-TOF MS. Polyethylene glycol-poly-L-lysine/RGD-PD/phospholipid/calcium phosphate nanoparticles (PEG-PLL/RGD-PD/PL/CaP NPs or MNPs) were prepared using a novel, simple method conducted at room temperature. Transmission electron microscopy (TEM) analysis showed that the MNPs were spheres of uniform size, with a diameter of ∼30 nm, and smooth surface...
January 1, 2018: Journal of Biomedical Nanotechnology
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