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https://www.readbyqxmd.com/read/28640316/electrospun-graphene-wrapped-na6-24fe4-88-p2o7-4-nanofibers-as-a-high-performance-cathode-for-sodium-ion-batteries
#1
Yubin Niu, Maowen Xu, Chunlong Dai, Bolei Shen, Chang Ming Li
Na6.24Fe4.88(P2O7)4 is one of the intensively investigated polyanionic compounds and has shown high rate discharge capacity, but its relatively low electronic conductivity hampers the high performance of the batteries. Herein for the first time we report new graphene wrapped Na6.24Fe4.88(P2O7)4 composite nanofibers (NFPO@C@rGO) made from electrospinning for cathodes of SIBs to achieve an even higher performance with a highly stable discharge capacity of ∼99 mA h g(-1) at a current density of 40 mA g(-1) after 320 cycles, which is 1...
June 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28638630/crystal-structure-of-a-pyrazine-2-3-dicarboxamide-ligand-and-of-its-silver-i-nitrate-complex-a-three-dimensional-coordination-polymer
#2
Dilovan S Cati, Helen Stoeckli-Evans
The title ligand, C18H16N6O2·2H2O (L1) [N(2),N(3)-bis-(pyridin-4-ylmeth-yl)pyrazine-2,3-dicarboxamide], crystallized as a dihydrate. The mol-ecule is U-shaped with the carboxamide groups being cis to one another, making a dihedral angle of 81.6 (5)°. The terminal pyridine rings are inclined to one another by 58.5 (4)°. There is an intra-molecular N-H⋯Npyrazine hydrogen bond present, forming an S(5) ring motif. In the crystal, adjacent mol-ecules are linked by N-H⋯Ocarboxamide hydrogen bonds, forming a chain along [001]...
June 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28638137/optimized-microwave-illusion-device
#3
Benjamin Vial, Max Munoz Torrico, Yang Hao
We report the design, fabrication and experimental verification of an illusion device working at microwave frequencies. A two dimensional topology optimization procedure is employed to find the binary layout of a dielectric coating that, when wrapped around a metallic cylinder, mimics the scattering from a predefined, arbitrarily-shaped dielectric object. Fabrication is carried out with 3D-printing and spatially resolved near field measurements in a waveguide configuration were performed, allowing us to map the illusion effect...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28636607/three-dimensional-cell-shapes-and-arrangements-in-human-sweat-glands-as-revealed-by-whole-mount-immunostaining
#4
Ryuichiro Kurata, Sugiko Futaki, Itsuko Nakano, Fumitaka Fujita, Atsushi Tanemura, Hiroyuki Murota, Ichiro Katayama, Fumihiro Okada, Kiyotoshi Sekiguchi
Because sweat secretion is facilitated by mechanical contraction of sweat gland structures, understanding their structure-function relationship could lead to more effective treatments for patients with sweat gland disorders such as heat stroke. Conventional histological studies have shown that sweat glands are three-dimensionally coiled tubular structures consisting of ducts and secretory portions, although their detailed structural anatomy remains unclear. To better understand the details of the three-dimensional (3D) coiled structures of sweat glands, a whole-mount staining method was employed to visualize 3D coiled gland structures with sweat gland markers for ductal luminal, ductal basal, secretory luminal, and myoepithelial cells...
2017: PloS One
https://www.readbyqxmd.com/read/28634726/connexin-channels-at-the-glio-vascular-interface-gatekeepers-of-the-brain
#5
Marijke De Bock, Luc Leybaert, Christian Giaume
Neuronal survival, electrical signaling and synaptic activity require a well-balanced micro-environment in the central nervous system. This is achieved by the blood-brain barrier (BBB), an endothelial barrier situated in the brain capillaries, that controls near-to-all passage in and out of the brain. The endothelial barrier function is highly dependent on signaling interactions with surrounding glial, neuronal and vascular cells, together forming the neuro-glio-vascular unit. Within this functional unit, connexin (Cx) channels are of utmost importance for intercellular communication between the different cellular compartments...
June 20, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28634367/proteomic-analysis-reveals-large-amounts-of-decomposition-enzymes-and-major-metabolic-pathways-involved-in-algicidal-process-of-trametes-versicolor-f21a
#6
Xueyan Gao, Congyan Wang, Wei Dai, Shenrong Ren, Fang Tao, Xingbing He, Guomin Han, Wei Wang
A recent algicidal mode indicates that fungal mycelia can wrap and eliminate almost all co-cultivated algal cells within a short time span. However, the underlying molecular mechanism is rarely understood. We applied proteomic analysis to investigate the algicidal process of Trametes versicolor F21a and identified 3,754 fungal proteins. Of these, 30 fungal enzymes with endo- or exoglycosidase activities such as β-1,3-glucanase, α-galactosidase, α-glucosidase, alginate lyase and chondroitin lyase were significantly up-regulated...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632166/dual-channel-cosine-function-based-itd-estimation-for-robust-speech-separation
#7
Xuliang Li, Zhaogui Ding, Weifeng Li, Qingmin Liao
In speech separation tasks, many separation methods have the limitation that the microphones are closely spaced, which means that these methods are unprevailing for phase wrap-around. In this paper, we present a novel speech separation scheme by using two microphones that does not have this restriction. The technique utilizes the estimation of interaural time difference (ITD) statistics and binary time-frequency mask for the separation of mixed speech sources. The novelties of the paper consist in: (1) the extended application of delay-and-sum beamforming (DSB) and cosine function for ITD calculation; and (2) the clarification of the connection between ideal binary mask and DSB amplitude ratio...
June 20, 2017: Sensors
https://www.readbyqxmd.com/read/28631873/roles-of-afadin-in-functional-differentiations-of-hippocampal-mossy-fiber-synapse
#8
Xiaoqi Geng, Tomohiko Maruo, Kenji Mandai, Irwan Supriyanto, Muneaki Miyata, Shotaro Sakakibara, Akira Mizoguchi, Yoshimi Takai, Masahiro Mori
A hippocampal mossy fiber synapse has a complex structure and is implicated in learning and memory. In this synapse, the mossy fiber boutons attach to the dendritic shaft by puncta adherentia junctions and wrap around a multiply-branched spine, forming synaptic junctions. We have recently shown using transmission electron microscopy, immunoelectron microscopy and serial block face-scanning electron microscopy that atypical puncta adherentia junctions are formed in the afadin-deficient mossy fiber synapse and that the complexity of postsynaptic spines and mossy fiber boutons, the number of spine heads, the area of postsynaptic densities and the density of synaptic vesicles docked to active zones are decreased in the afadin-deficient synapse...
June 20, 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/28631111/suffocation-caused-by-plastic-wrap-covering-the-face-combined-with-nitrous-oxide-inhalation
#9
Peter Mygind Leth, Birgitte Schmidt Astrup
Suicide using a combination of a plastic bag over the head and inhalation of a non-irritating gas, such as helium, argon or nitrogen, has been reported in the literature. Here an unusual suicide method in a 17-year old man by suffocation from covering the face with household plastic wrap, combined with nitrous oxide inhalation, is presented. The case was reviewed based on police, autopsy and hospital reports. A PubMed search for scientific literature related to nitrous oxide abuse and suicide by suffocation was performed and our findings discussed in relation to the scientific literature found...
June 19, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28626866/activation-of-catalase-by-pioglitazone-multiple-spectroscopic-methods-combined-with-molecular-docking-studies
#10
Reza Yekta, Gholamreza Dehghan, Samaneh Rashtbari, Nader Sheibani, Ali Akbar Moosavi-Movahedi
Pioglitazone is an important prescription antidiabetic drug with positive roles in controlling high blood sugar in patients with type 2 diabetes. In the present study, we investigated the effects of pioglitazone on the structure and function of bovine liver catalase (BLC) using different spectroscopic and theoretical methods. UV-Vis absorption, fluorescence spectroscopy, synchronous fluorescence, and circular dichroism studies revealed conformational changes in the BLC structure and heme group in the presence of different concentrations of pioglitazone...
June 19, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28626596/management-of-severe-developmental-regression-in-an-autistic-child-with-a-1q21-3-microdeletion-and-self-injurious-blindness
#11
Cora Cravero, Vincent Guinchat, Jean Xavier, Camille Meunier, Lautaro Diaz, Cyril Mignot, Diane Doummar, Sandra Chantot-Bastaraud, Angèle Consoli, David Cohen
We report the case of a young boy with nonverbal autism and intellectual disability, with a rare de novo 1q21.3 microdeletion. The patient had early and extreme self-injurious behaviours that led to blindness, complicated by severe developmental regression. A significant reduction in the self-injurious behaviours and the recovery of developmental dynamics were attained in a multidisciplinary neurodevelopmental inpatient unit. Improvement was obtained after managing all causes of somatic pains, using opiate blockers and stabilizing the patient's mood...
2017: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/28623230/flexible-body-motions-of-calmodulin-and-the-farnesylated-hypervariable-region-yield-a-high-affinity-interaction-enabling-k-ras4b-membrane-extraction
#12
Hyunbum Jang, Avik Banerjee, Tanmay Chavan, Vadim Gaponenko, Ruth Nussinov
In calmodulin (CaM)-rich environments, oncogenic KRAS plays a critical role in adenocarcinomas by promoting PI3K/Akt signaling. We previously proposed that at elevated calcium levels in cancer, CaM recruits PI3Kα to the membrane and extracts K-Ras4B from the membrane, organizing a K-Ras4B/CaM/PI3Kα ternary complex. CaM can thereby replace a missing receptor tyrosine kinase signal to fully activate PI3Kα. Recent experimental data show that CaM selectively promotes K-Ras signaling, but not of N-Ras or H-Ras...
June 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28621369/transport-of-nanoparticles-across-pulmonary-surfactant-monolayer-a-molecular-dynamics-study
#13
Yan Xu, Li Deng, Hao Ren, Xianren Zhang, Fang Huang, Tongtao Yue
Pulmonary nanodrug delivery is an emerging concept, especially for targeted lung cancer therapy. Once inhaled, the nanoparticles (NPs) acting as drug carriers need to efficiently cross the pulmonary surfactant monolayer (PSM) of lung alveoli, which act as the first barrier for external particles entering the lung. Herein, by performing molecular dynamics simulations, we study how inhaled NPs interact with the PSM, particularly focusing on the transport of NPs with different properties across the PSM. While hydrophilic NPs translocate directly across the PSM, transport of hydrophobic NPs is achieved as the PSM wraps them...
June 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28618598/designing-nucleosomal-force-sensors
#14
M Tompitak, L de Bruin, B Eslami-Mossallam, H Schiessel
About three quarters of our DNA is wrapped into nucleosomes: DNA spools with a protein core. It is well known that the affinity of a given DNA stretch to be incorporated into a nucleosome depends on the geometry and elasticity of the basepair sequence involved, causing the positioning of nucleosomes. Here we show that DNA elasticity can have a much deeper effect on nucleosomes than just their positioning: it affects their "identities". Employing a recently developed computational algorithm, the mutation Monte Carlo method, we design nucleosomes with surprising physical characteristics...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618160/vaccinia-virus-a11-is-required-for-membrane-rupture-and-viral-membrane-assembly
#15
Cristina Suarez, Simone Hoppe, Esthel Pénard, Paul Walther, Jacomine Krijnse Locker
While most enveloped viruses acquire their membrane from the host by budding or a wrapping process, collective data argue that nucleo-cytoplasmic large DNA viruses (NCLDVs) may be an exception. The prototype member of NCLDVs, vaccinia virus (VACV) may induce rupture of ER-derived membranes to build an open membrane sphere that closes after DNA uptake. This unconventional membrane assembly pathway is also used by at least three other members of the NCLDVs. In this study we identify the VACV gene product of A11, as required for membrane rupture, hence for VACV-membrane assembly and virion formation...
June 15, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28617274/supporting-constructed-wetlands-in-p-removal-efficiency-from-surface-water
#16
Agnieszka Bus, Agnieszka Karczmarczyk
The research investigated the implementation of suspended reactive filters to support the phosphorus (P) removal efficiency of constructed wetlands (CWs). The reactive material (RM) used in this study was autoclaved aerated concrete (AAC). The laboratory experiment consists of four plastic boxes filled with the volume of 10 L of artificial P solution with three variants of RM mass to volume ratio: 1:1 (g:L), 5:1 (g:L), 10:1 (g:L), and the blind probe 0:1 (g:L) as a reference. AAC of different weights (10, 50 and 100 g) was wrapped in a filter bag, put into boxes, and suspended...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28616345/wrapping-of-the-ascending-aorta-revisited-is-there-any-role-left-for-conservative-treatment-of-ascending-aortic-aneurysm
#17
REVIEW
José María González-Santos, María Elena Arnáiz-García
Dilatation of the ascending aorta (AA) is a common finding in patients with aortic valve disease. The clinical practice guidelines recommend replacing the AA whenever the diameter exceeds 45 mm. However, no consensus has been reached regarding the approach when the aorta is only moderately dilated. Although the risk in aorta replacement is generally low, it may be higher when associated with other complex surgical procedures or it is carried out in elderly patients or patients with significant comorbidity. This would justify the use of alternative surgical techniques, which reduce surgical risk and guarantee a durable correction of the aortic pathology...
May 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28615444/the-human-mitochondrial-single-strand-dna-binding-protein-displays-distinct-kinetics-and-thermodynamics-of-dna-binding-and-exchange
#18
Yufeng Qian, Kenneth A Johnson
The human mitochondrial SSB (mtSSB) is a homo-tetrameric protein, involved in mtDNA replication and maintenance. Although mtSSB is structurally similar to SSB from Escherichia coli (EcoSSB), it lacks the C-terminal disordered domain but little is known about the biophysics of mtSSB-ssDNA interactions. Here, we characterized the kinetics and thermodynamics of mtSSB binding to ssDNA by equilibrium titrations and stopped-flow kinetic measurements. We show that the mtSSB tetramer can bind to ssDNA in two distinct binding modes: (SSB)30 and (SSB)60, defined by DNA binding site sizes of 30 and 60 nt, respectively...
June 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28615210/a-conserved-leucine-zipper-motif-in-gammaherpesvirus-orf52-is-critical-for-distinct-microtubule-rearrangements
#19
Matthew S Loftus, Nancy Verville, Dean H Kedes
Productive viral infection often depends on manipulation of the cytoskeleton. Herpesviruses, including Rhesus monkey rhadinovirus (RRV) and its close homolog the oncogenic human gammaherpesvirus, Kaposi's sarcoma-associated herpesvirus (KSHV/HHV8), exploit microtubule-based retrograde transport to deliver their genomes to the nucleus. Subsequently, during the lytic phase of the life cycle, the maturing viral particles undergo orchestrated translocation to specialized regions within the cytoplasm, leading to tegumentation, secondary envelopment, and then egress...
June 14, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28614369/unlocking-the-vital-role-of-host-cells-in-hair-follicle-reconstruction-by-semi-permeable-capsules
#20
Zhexiang Fan, Yong Miao, Qian Qu, Shune Xiao, Jin Wang, Lijuan Du, Bingcheng Liu, Zhiqi Hu
Organ regeneration is becoming a promising choice for many patients; however, many details about the mechanisms underlying organ regeneration remain unknown. As regenerative organs, hair follicles offer a good model to study the mechanisms associated with regenerative medicine. The relevant studies have mainly focused on donor cells, and there are no systematic studies involving the effect of host factors on hair follicle reconstruction. Thus, we intend to explore the effect of host cells on hair follicle reconstruction...
2017: PloS One
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