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Jasmin S Shaikh, Navajsharif S Shaikh, Rohini Kharade, Sonali A Beknalkar, Jyoti V Patil, Mahesh P Suryawanshi, Pongsakorn Kanjanaboos, Chang Kook Hong, Jin Hyeok Kim, Pramod S Patil
Symmetric supercapacitor is advanced over simple supercapacitor device due to their stability over a large potential window and high energy density. Graphene is a desired candidate for supercapacitor application since it has a high surface area, good electronic conductivity and high electro chemical stability. There is a pragmatic use of ionic liquid electrolyte for supercapacitor due to its stability over a large potential window, good ionic conductivity and eco-friendly nature. For high performance supercapacitor, the interaction between ionic liquid electrolyte and graphene are crucial for better charge transportation...
May 11, 2018: Journal of Colloid and Interface Science
Yuantao Zhou, Shurui Cao, Cunxian Xi, Jiuyan Chen, Lei Zhang, Xianliang Li, Guomin Wang, Zhiqiong Chen
A magnetic solid-phase extraction adsorbent that consisted of citrus peel-derived nanoporous carbon and silica-coated Fe3 O4 microspheres (C/SiO2 @Fe3 O4 ) was successfully fabricated by co-precipitation. As a modifier for magnetic microspheres, citrus peel-derived nanoporous carbon was not only economical and renewable for its raw material, but exerted enormous nanosized pore structure, which could directly influence the type of adsorbed analytes. The C/SiO2 @Fe3 O4 also possessed the advantages of Fe3 O4 microspheres like superparamagnetism, that could be easily separated magnetically after adsorption...
May 18, 2018: Journal of Separation Science
Salman Sohrabi, Yaling Liu
Pseudopotential lattice Boltzmann methods (LBMs) can simulate a phase transition in high-density ratio multiphase flow systems. If coupled with thermal LBMs through equation of state, they can be used to study instantaneous phase transition phenomena with a high-temperature gradient where only one set of formulations in an LBM system can handle liquid, vapor, phase transition, and heat transport. However, at lower temperatures an unrealistic spurious current at the interface introduces instability and limits its application in real flow system...
March 2018: Physical Review. E
Lev Voskoboinik, Uzi Motro, Ariel Darvasi
Interpretation of complex DNA mixtures is an ongoing challenge in the field of forensic genetics. Commonly used STR markers are quite polymorphic, enabling very high statistical association between a single source DNA profile from a crime scene and a matching suspect. STR typing of low order mixtures with two and three contributors also commonly produces high statistical association for a contributor, using current interpretation software. However higher order mixtures, with four contributors or more, are more challenging...
May 2, 2018: Forensic Science International. Genetics
Katharina Brassat, Daniel Kool, Julius Bürger, Jörg K N Lindner
Bottom-up patterning techniques allow for the creation of surfaces with ordered arrays of nanoscale features on large areas. Two bottom-up techniques suitable for the formation of regular nanopatterns on different length scales are nanosphere lithography (NSL) and block copolymer (BCP) lithography. In this paper it is shown that NSL and BCP lithography can be combined to easily design hierarchically nanopatterned surfaces of different materials. Nanosphere lithography is used for the pre-patterning of surfaces with antidots, i...
May 18, 2018: Nanoscale
Racheli Ron, Emir Haleva, Adi Salomon
Nanoporous metallic networks are a group of porous materials made of solid metals with suboptical wavelength sizes of both particles and voids. They are characterized by unique optical properties, as well as high surface area and permeability of guest materials. As such, they attract a great focus as novel materials for photonics, catalysis, sensing, and renewable energy. Their properties together with the ability for scaling-up evoke an increased interest also in the industrial field. Here, fabrication techniques of large-scale metallic networks are discussed, and their interesting optical properties as well as their applications are considered...
May 17, 2018: Advanced Materials
Thomas Auger, Loïc Auvray, Jean-Marc Di Meglio, Fabien Montel
We study the flow injection of semiflexible polymers in a nanopore with a diameter smaller than the persistence length of the macromolecules. The suction model from de Gennes and Brochard is modified to take into account the effect of the rigidity of the polymer in the Odijk regime. We show that in this case of extreme confinement the flow threshold vanishes slowly and that in the limit of infinitely small nanopore the free energy barrier eventually disappears.
May 17, 2018: European Physical Journal. E, Soft Matter
Sophie M Colston, Gregory A Ellis, Seongwon Kim, Hemantha W Wijesekera, Dagmar H Leary, Baochuan Lin, Benjamin C Kirkup, W Judson Hervey, Gary J Vora
Vibrio campbellii is a pathogen of aquatic animals and has been proposed as a bacterial partner in the formation of bioluminescent milky seas. We present here the complete genome sequences assembled from Illumina and Oxford Nanopore data for two bioluminescent Vibrio campbellii strains (BoB-53 and BoB-90) isolated from biofouled moorings in the Bay of Bengal.
May 17, 2018: Genome Announcements
Mitsunori Yoshida, Hanako Fukano, Yuji Miyamoto, Keigo Shibayama, Masato Suzuki, Yoshihiko Hoshino
Mycobacterium marinum is a slowly growing, broad-host-range mycobacterial species. Here, we report the complete genome sequence of a Mycobacterium marinum type strain that was isolated from tubercles of diseased fish. This sequence will provide essential information for future taxonomic and comparative genome studies of its relatives.
May 17, 2018: Genome Announcements
Yosuke Bando, Ko Nakanishi, Shigeaki Abe, Shuichi Yamagata, Yasuhiro Yoshida, Junichiro Iida
We investigated in controlled dye-release behavior of nanosized silica particles containing nanocavities (Nanoporous silica, NPS). To determine this, NPS were mixed with glass ionomer cement (GIC), which is a medical material used as a matrix. The dye-release behavior was observed using a UV-visible spectrometer. After cationic dye was charged into GIC pellet containing NPS, the pellet could gradually release cationic dye for up to two weeks. To understand the dependence of electric charge on the dye-release behavior, three types of dyes with different charge were also investigated...
January 1, 2018: Journal of Nanoscience and Nanotechnology
Anthony Bayega, Yu Chang Wang, Spyros Oikonomopoulos, Haig Djambazian, Somayyeh Fahiminiya, Jiannis Ragoussis
RNA sequencing using next-generation sequencing (NGS, RNA-Seq) technologies is currently the standard approach for gene expression profiling, particularly for large-scale high-throughput studies. NGS technologies comprise short-read RNA-Seq (dominated by Illumina) and long-read RNA-Seq technologies provided by Pacific Bioscience (PacBio) and Oxford Nanopore Technologies (ONT). Although short-read sequencing technologies are the most widely used, long-read technologies are increasingly becoming the standard approach for de novo transcriptome assembly and isoform expression quantification due to the complex nature of the transcriptome which consists of variable lengths of transcripts and multiple alternatively spliced isoforms for most genes...
2018: Methods in Molecular Biology
Weibo Zhang, Shuang Wang, Shaohua Ge, Jialong Chen, Ping Ji
Biomedical device-associated infection (BAI) and lack of osseointegration are the main causes of implant failure. Therefore, it is imperative for implants not only to depress microbial activity and biofilm colonization but also to prompt osteoblast functions and osseointegration. As part of the coating development for implants, the interest of in vitro studies on the interaction between implant substrate morphology and the coating's biological performances is growing. In this study, by harnessing the adhesion and reactivity of bioinspired polydopamine, nano-silver was successfully anchored onto micro/nanoporous as well as smooth titanium surfaces to analyse the effect of substrate morphology on biological performances of the coatings...
April 2018: Royal Society Open Science
Emily Rames, Joanne Macdonald
Enteroviruses (EV) are associated with a range of serious infections, including aseptic meningitis, hand foot and mouth disease, myocarditis, acute flaccid paralysis and encephalitis. Improved methods for assessing EV genotypic diversity could assist molecular epidemiology studies, clinical diagnosis and environmental surveillance. We report new methods for EV genome amplification, and subsequent genotyping using the miniaturised MinION sequencing device. Importantly, this next-generation sequencer enabled correct strain-level assignment of identity for the EV-A71 isolate assessed, where strains with up to 99...
May 12, 2018: Virus Research
Muralikrishna Lella, Radhakrishnan Mahalakshmi
Membrane protein aggregation is associated with neurodegenerative diseases. Despite remarkable advances to map protein aggregation, molecular elements that drive the structural transition from functional to amyloidogenic β-sheet polymers remain elusive. Here, we report a simple and reliable reverse-mapping method to identify the molecular elements. We validate our approach by obtaining molecular details of aggregation loci of human β-barrel nanopore ion channels that are vital for cell survival. By coupling bottom-up synthesis with time-resolved aggregation kinetics and high-resolution imaging, we identify molecular elements that switch folded channels to polymeric β-rich aggregates...
May 15, 2018: Journal of Physical Chemistry Letters
Ioannis Skarmoutsos, Mohamed Eddaoudi, Guillaume Maurin
Force field based-Molecular dynamics simulations were deployed to systematically explore the dynamics of confined molecules of different shapes and sizes, i.e. linear (CO2 and N2) and spherical (CH4) fluids, in a model small pore system, i.e. the Metal-Organic Framework SIFSIX-2-Cu-i. These computations unveil an unprecedented molecular symmetry dependence of the translational and rotational dynamics of fluids confined in channel-like nanoporous materials. In particular this peculiar behaviour is reflected by the extremely slow decay of the Legendre reorientational correlation functions of even-parity order for the linear fluids which is associated to jump-like orientation flips, while the spherical fluid shows a very fast decay taking place in a sub-picosecond time scale...
May 15, 2018: Journal of Physical Chemistry Letters
Yuanzhi Zhu, Xifan Chen, Jing Liu, Junfeng Zhang, Danyun Xu, Wenchao Peng, Yang Li, Guoliang Zhang, Fengbao Zhang, Xiaobin Fan
Porous organic polymers (POFs) are promising precursors for developing high performance transition metal-nitrogen-carbon (M-N/C) catalysts towards ORR. But the rational design of POFs precursors remain a great challenge, because of the elusive structural association between the sacrificial POFs and the final M-N/C catalysts. Based on covalent triazine frameworks (CTFs), we developed a series of sulfur-doped Fe-N/C catalysts by selecting six different aromatic nitriles as building blocks. A new mixed solvent of molten FeCl3 and S was used for CTF polymerization, which benefit the formation of Fe-Nx site and make the subsequent pyrolysis process more convenient...
May 15, 2018: ChemSusChem
Kim N T Ton, Simone L Cree, Sabine J Gronert-Sum, Tony R Merriman, Lisa K Stamp, Martin A Kennedy
The human leukocyte antigen (HLA) system encodes the human major histocompatibility complex (MHC). HLA-B is the most polymorphic gene in the MHC class I region and many HLA-B alleles have been associated with adverse drug reactions (ADRs) and disease susceptibility. The frequency of such HLA-B alleles varies by ethnicity, and therefore it is important to understand the prevalence of such alleles in different population groups. Research into HLA involvement in ADRs would be facilitated by improved methods for genotyping key HLA-B alleles...
2018: Frontiers in Genetics
Ahmad Motahari, Naiping Hu, Amir Vahid, Abdollah Omrani, Abbas Ali Rostami, Dale W Schaefer
This work exploits gas adsorption and small-angle X-ray scattering (SAXS) to illuminate morphology of complex nanoporous materials. We resolve multiple classes of porosity including previously undetected large-scale texture that significantly compromises the canonical interpretation of gas adsorption. Specifically, a UVM-7 class mesoporous silica was synthesized that has morphological features on three length scales: macropores due to packing of 150-nm globules, 1.9-nm-radius spherical mesopores inside the globules and >7-nm pockets on and between the globules...
May 14, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Zhimin Fan, Youshan Wang, Zhimin Xie, Xueqing Xu, Yin Yuan, Zhongjun Cheng, Yuyan Liu
MXene films are attractive for use in advanced supercapacitor electrodes on account of their ultrahigh density and pseudocapacitive charge storage mechanism in sulfuric acid. However, the self-restacking of MXene nanosheets severely affects their rate capability and mass loading. Herein, a free-standing and flexible modified nanoporous MXene film is fabricated by incorporating Fe(OH)3 nanoparticles with diameters of 3-5 nm into MXene films and then dissolving the Fe(OH)3 nanoparticles, followed by low calcination at 200 °C, resulting in highly interconnected nanopore channels that promote efficient ion transport without compromising ultrahigh density...
May 14, 2018: Nanoscale
Xinxin Xiao, Edmond Magner
A quasi-solid-state and flexible biofuel cell using a hydrogel electrolyte preloaded with sugar as a fuel is described. The device can function as a self-powered biosupercapacitor delivering pulses for over 600 cycles, with a power density over 10 times higher than that from the biofuel cell alone.
May 14, 2018: Chemical Communications: Chem Comm
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