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https://www.readbyqxmd.com/read/27911498/solvothermally-prepared-cu2o-electrocatalysts-for-co2-reduction-with-tunable-selectivity-by-the-introduction-of-p-block-elements
#1
Gastón O Larrazábal, Antonio J Martín, Frank Krumeich, Roland Hauert, Javier Pérez-Ramírez
The electroreduction of CO2 to fuels and chemicals is an attractive strategy for valorizing CO2 emissions. In this study, we show that a Cu2O electrocatalyst prepared by a simple and potentially scalable solvothermal route effectively targeted CO evolution at low to moderate overpotentials (CECO ca. 60% after 12 h at -0.6 V vs. RHE), and that the introduction of p-block elements (In, Sn, Ga, Al) into the catalyst can be employed to tune its selectivity. SEM, HRTEM, and voltammetric analyses revealed that the Cu2O catalyst undergoes extensive surface restructuring (favorable for CO evolution) under reaction conditions...
December 2, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27911460/retrospective-comparison-of-two-different-approaches-for-ultrasound-guided-internal-jugular-vein-cannulation-in-hemodialysis-patients
#2
Antonio Treglia, Dario Musone, Francesco Amoroso
BACKGROUND: Prevalent hemodialysis patients with vascular access consisting of a central venous catheter (CVC) are continuously increasing over the years. Improvement in evolution and CVC placement procedures represents therefore an essential tool to enhance performance and reduce intraoperative and long-term CVC complications. Internal jugular vein (IJV) catheterization techniques are different according to ultrasound probe position in relation to vein axis and to needle direction in relation to ultrasound beam...
December 2, 2016: Journal of Vascular Access
https://www.readbyqxmd.com/read/27911438/evolutionary-convergence-in-experimental-pseudomonas-populations
#3
Peter A Lind, Andrew D Farr, Paul B Rainey
Model microbial systems provide opportunity to understand the genetic bases of ecological traits, their evolution, regulation and fitness contributions. Experimental populations of Pseudomonas fluorescens rapidly diverge in spatially structured microcosms producing a range of surface-colonising forms. Despite divergent molecular routes, wrinkly spreader (WS) niche specialist types overproduce a cellulosic polymer allowing mat formation at the air-liquid interface and access to oxygen. Given the range of ways by which cells can form mats, such phenotypic parallelism is unexpected...
December 2, 2016: ISME Journal
https://www.readbyqxmd.com/read/27911247/correlation-of-mortality-with-lesion-level-in-patients-with-myelomeningocele-a-population-based-study
#4
Joel Haakon Borgstedt-Bakke, Morten Fenger-Grøn, Mikkel Mylius Rasmussen
OBJECTIVE The aim of this study was to assess myelomeningocele mortality, correlate these findings to lesion level, and investigate mortality evolution. METHODS From the population-based western Denmark myelomeningocele database, the authors extracted the records of 187 patients born between January 1, 1970, and July 1, 2015. Patients were categorized according to their most rostral lesion level into cervical, thoracic, lumbar, or sacral groups. Furthermore, patients were categorized based on their birth dates (1970-1979, 1980-1989, and 1990-2015)...
December 2, 2016: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/27911186/rna-decay-evolution-and-the-testis
#5
Samantha H Jones, Miles Wilkinson
NMD is a highly conserved pathway that degrades specific subsets of RNAs. There is increasing evidence for roles of NMD in development. In this commentary, we focus on spermatogenesis, a process dramatically impeded upon loss or disruption of NMD. NMD requires strict regulation for normal spermatogenesis, as loss of a newly discovered NMD repressor, UPF3A, also causes spermatogenic defects, most prominently during meiosis. We discuss the unusual evolution of UPF3A, whose paralog, UPF3B, has the opposite biochemical function and acts in brain development...
December 2, 2016: RNA Biology
https://www.readbyqxmd.com/read/27911124/the-impact-of-interferon-alpha2-on-hla-genes-in-patients-with-polycythemia-vera-and-related-neoplasms
#6
Vibe Skov, Caroline Hasselbalch Riley, Mads Thomassen, Lasse Kjær, Thomas Stauffer Larsen, Ole Weis Bjerrum, Torben A Kruse, Hans Carl Hasselbalch
Gene expression profiling in Philadelphia-negative chronic myeloproliferative neoplasms (MPNs) have unraveled significant deregulation of several immune and inflammation genes of potential importance for clonal evolution. Other mechanisms might be downregulation of major histocompatibility class I and II genes used by tumor cells to escape antitumor T-cell-mediated immune responses. Several genes encoding human leukocyte antigen (HLA) class I and II molecules have been shown to be significantly downregulated...
December 2, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27911097/performance-of-an-anaerobic-membrane-bioreactor-in-which-granular-sludge-and-dynamic-filtration-are-integrated
#7
Jixiang Yang, Xin Ji, Lunhui Lu, Hua Ma, Youpeng Chen, Jinsong Guo, Fang Fang
To alleviate the fouling of a filter, simple substrates, dynamic filtration, and granular sludge were applied in an anaerobic membrane bioreactor (AnMBR). The results showed that under a transmembrane pressure < 20 kPa, the filter flux ranged between 15 and 20 l (m(-2) h)(-1) for a period of 30 days. The flux was higher than the typical flux of AnMBRs with conventional membranes and most current dynamic filters. In addition, the low cost of the filter avoided the need for a higher flux. Moreover, a stable granular sludge bed, which consumed all volatile fatty acids, was maintained...
December 2, 2016: Biofouling
https://www.readbyqxmd.com/read/27911038/quantitating-the-cell-turning-images-into-numbers-with-imagej
#8
REVIEW
Ellen T Arena, Curtis T Rueden, Mark C Hiner, Shulei Wang, Ming Yuan, Kevin W Eliceiri
Modern biological research particularly in the fields of developmental and cell biology has been transformed by the rapid evolution of the light microscope. The light microscope, long a mainstay of the experimental biologist, is now used for a wide array of biological experimental scenarios and sample types. Much of the great developments in advanced biological imaging have been driven by the digital imaging revolution with powerful processors and algorithms. In particular, this combination of advanced imaging and computational analysis has resulted in the drive of the modern biologist to not only visually inspect dynamic phenomena, but to quantify the involved processes...
December 2, 2016: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/27911018/sperm-competition-and-the-evolution-of-precopulatory-weapons-testis-size-and-amplexus-position-but-not-arm-strength-affect-fertilization-success-in-a-chorusing-frog
#9
Bruno A Buzatto, Evan M Thyer, J Dale Roberts, Leigh W Simmons
Trade-offs between pre- and postcopulatory traits influence their evolution, and male expenditure on such traits is predicted to depend on the number of competitors, the benefits from investing in weapons, and the risk and intensity of sperm competition. Males of the chorusing frog Crinia georgiana use their arms as weapons in contest competition. Previously, we showed that increased numbers of rivals elevated the risk and intensity of sperm competition due to multimale amplexus, and caused a reversal in the direction of precopulatory selection on arm girth...
December 2, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27910991/structural-fingerprints-of-yielding-mechanisms-in-attractive-colloidal-gels
#10
Arman Boromand, Safa Jamali, João M Maia
Core-Modified Dissipative Particle Dynamics (CM-DPD) with a modified depletion potential and full hydrodynamics description is used to study non-equilibrium properties of colloidal gels with short range attraction potentials at an intermediate volume fraction (ϕ = 0.2) under start-up shear deformation. Full structural and rheological analysis using the stress fabric tensor complemented by bond number and bond distribution evolution under flow reveals that similarly to dilute colloidal gels, flow-induced anisotropy and strain-induced stretching of bonds are present during the first yielding transition...
December 2, 2016: Soft Matter
https://www.readbyqxmd.com/read/27910987/on-the-formation-of-nitrogen-substituted-polycyclic-aromatic-hydrocarbons-npahs-in-circumstellar-and-interstellar-environments
#11
REVIEW
Dorian S N Parker, Ralf I Kaiser
The chemical evolution of extraterrestrial environments leads to the formation of polycyclic aromatic hydrocarbons (PAHs) via gas phase radical mediated aromatization reactions. We review that these de facto barrierless reactions are capable of forming prebiotic molecules such as nitrogen substituted PAHs (NPAHs), which represent the missing link between nitrogen bearing acyclic molecules and prebiotic nucleobases along with vitamins found in meteorites. Crucial routes leading to the incorporation of nitrogen atoms into the aromatic ring have been exposed...
December 2, 2016: Chemical Society Reviews
https://www.readbyqxmd.com/read/27910968/designing-hierarchical-hollow-nanostructures-of-cu2mos4-for-improved-hydrogen-evolution-reaction
#12
Ke Zhang, Yongli Zheng, Yunxiang Lin, Changda Wang, Hengjie Liu, Daobin Liu, Chuanqiang Wu, Shuangming Chen, Yanxia Chen, Li Song
Layered Cu2MoS4, consisting of earth-abundant elements, is regarded as a potential catalyst for the hydrogen evolution reaction (HER). Herein, we demonstrate a Cu2O-based template strategy to synthesise hierarchical hollow nanostructures of Cu2MoS4. The characterizations reveal that the electrochemically active surface of the hollow Cu2MoS4 is largely enhanced, in contrast to the nanosheet or nanoparticle structures. As the direct outcome, the designed hierarchical hollow structures display excellent HER activities with a low overvoltage and small Tafel slope...
December 2, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27910956/spin-crossover-materials-towards-microwave-radiation-switches
#13
Olesia I Kucheriv, Viktor V Oliynyk, Volodymyr V Zagorodnii, Vilen L Launets, Il'ya A Gural'skiy
Microwave electromagnetic radiation that ranges from one meter to one millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able to tune microwave radiation getting widespread interest. Here we offer a new way to tune GHz frequency radiation by using spin-crossover complexes that are known to change their various physical properties under the influence of diverse external stimuli. As a result of electronic re-configuration process, microwave absorption properties differ for high spin and low spin forms of the complex...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910932/oer-activity-manipulated-by-iro6-coordination-geometry-an-insight-from-pyrochlore-iridates
#14
Wei Sun, Ji-Yuan Liu, Xue-Qing Gong, Waqas-Qamar Zaman, Li-Mei Cao, Ji Yang
The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO2) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO2 or the novel crystal structure...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910910/genome-wide-characterisation-and-expression-profile-of-the-grapevine-atl-ubiquitin-ligase-family-reveal-biotic-and-abiotic-stress-responsive-and-development-related-members
#15
Pietro Ariani, Alice Regaiolo, Arianna Lovato, Alejandro Giorgetti, Andrea Porceddu, Salvatore Camiolo, Darren Wong, Simone Castellarin, Elodie Vandelle, Annalisa Polverari
The Arabidopsis Tóxicos en Levadura (ATL) protein family is a class of E3 ubiquitin ligases with a characteristic RING-H2 Zn-finger structure that mediates diverse physiological processes and stress responses in plants. We carried out a genome-wide survey of grapevine (Vitis vinifera L.) ATL genes and retrieved 96 sequences containing the canonical ATL RING-H2 domain. We analysed their genomic organisation, gene structure and evolution, protein domains and phylogenetic relationships. Clustering revealed several clades, as already reported in Arabidopsis thaliana and rice (Oryza sativa), with an expanded subgroup of grapevine-specific genes...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910898/hydrogen-overproducing-nitrogenases-obtained-by-random-mutagenesis-and-high-throughput-screening
#16
Emma Barahona, Emilio Jiménez-Vicente, Luis M Rubio
When produced biologically, especially by photosynthetic organisms, hydrogen gas (H2) is arguably the cleanest fuel available. An important limitation to the discovery or synthesis of better H2-producing enzymes is the absence of methods for the high-throughput screening of H2 production in biological systems. Here, we re-engineered the natural H2 sensing system of Rhodobacter capsulatus to direct the emission of LacZ-dependent fluorescence in response to nitrogenase-produced H2. A lacZ gene was placed under the control of the hupA H2-inducible promoter in a strain lacking the uptake hydrogenase and the nifH nitrogenase gene...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910875/an-integrated-modelling-framework-from-cells-to-organism-based-on-a-cohort-of-digital-embryos
#17
Paul Villoutreix, Julien Delile, Barbara Rizzi, Louise Duloquin, Thierry Savy, Paul Bourgine, René Doursat, Nadine Peyriéras
We conducted a quantitative comparison of developing sea urchin embryos based on the analysis of five digital specimens obtained by automatic processing of in toto 3D+ time image data. These measurements served the reconstruction of a prototypical cell lineage tree able to predict the spatiotemporal cellular organisation of a normal sea urchin blastula. The reconstruction was achieved by designing and tuning a multi-level probabilistic model that reproduced embryo-level dynamics from a small number of statistical parameters characterising cell proliferation, cell surface area and cell volume evolution along the cell lineage...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910854/the-genetic-basis-and-fitness-consequences-of-sperm-midpiece-size-in-deer-mice
#18
Heidi S Fisher, Emily Jacobs-Palmer, Jean-Marc Lassance, Hopi E Hoekstra
An extensive array of reproductive traits varies among species, yet the genetic mechanisms that enable divergence, often over short evolutionary timescales, remain elusive. Here we examine two sister-species of Peromyscus mice with divergent mating systems. We find that the promiscuous species produces sperm with longer midpiece than the monogamous species, and midpiece size correlates positively with competitive ability and swimming performance. Using forward genetics, we identify a gene associated with midpiece length: Prkar1a, which encodes the R1α regulatory subunit of PKA...
December 2, 2016: Nature Communications
https://www.readbyqxmd.com/read/27910763/il10-a-tale-of-an-evolutionarily-conserved-cytokine-across-vertebrates
#19
M Carla Piazzon, George Lutfalla, Maria Forlenza
IL10 was discovered in 1989, and since then it has been the subject of intense investigation, which has revealed its potent anti-inflammatory and regulatory activities in most immune processes during infection and disease. In 2003, the first non-mammalian IL10 sequence was identified in teleost fish, followed in 2004 by the chicken IL10 sequence. In this review, we summarize the work performed in non-mammalian vertebrates in which the IL10, IL10 receptors (IL10Rs), and their signaling components have been identified...
2016: Critical Reviews in Immunology
https://www.readbyqxmd.com/read/27910743/decoding-the-polyphyletic-flexibility-of-allosteric-modular-networks-progress-and-perspectives
#20
Yanan Yu, Zhong Wang, Yongyan Wang
Advances in identifying architecture of modules and elucidating their modes of action are gradually improving the decoding of complex relationships between phenotypic robustness and genotypic networks. However, approaches to detecting modules have largely focused on identifying modules in static graphs. In this review, we attempt to reveal the mechanism of polyphyletic architectural transformation based on modular boundary evolutions and different oscillating factors. With the rapid progress in probing into the detailed structural model of modular networks, flexible modular organization manifests a key adaptive balancing ability of allosterically regulating or reconstructing intermodular and intramodular states to uncover the novel biological alterations beyond engineering properties...
2016: Critical Reviews in Eukaryotic Gene Expression
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