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https://www.readbyqxmd.com/read/29155236/evaluation-of-sampling-and-storage-procedures-on-preserving-the-community-structure-of-stool-microbiota-a-simple-at-home-toilet-paper-collection-method
#1
Kait F Al, Jordan E Bisanz, Greg B Gloor, Gregor Reid, Jeremy P Burton
BACKGROUND: The increasing interest on the impact of the gut microbiota on health and disease has resulted in multiple human microbiome-related studies emerging. However, multiple sampling methods are being used, making cross-comparison of results difficult. To avoid additional clinic visits and increase patient recruitment to these studies, there is the potential to utilize at-home stool sampling. The aim of this pilot study was to compare simple self-sampling collection and storage methods...
November 16, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29155105/functional-diversification-of-sea-lamprey-globins-in-evolution-and-development
#2
Angela Fago, Kim Rohlfing, Elin E Petersen, Agnieszka Jendroszek, Thorsten Burmester
Agnathans have a globin repertoire that markedly differs from that of jawed (gnathostome) vertebrates. The sea lamprey (Petromyzon marinus) harbors at least 18 hemoglobin, two myoglobin, two globin X, and one cytoglobin genes. However, agnathan hemoglobins and myoglobins are not orthologous to their cognates in jawed vertebrates. Thus, blood-based O2 transport and muscle-based O2 storage proteins emerged twice in vertebrates from a tissue-globin ancestor. Notably, the sea lamprey displays three switches in hemoglobin expression in its life cycle, analogous to hemoglobin switching in vertebrates...
November 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29154646/developmental-stability-in-gender-typed-preferences-between-infancy-and-preschool-age
#3
Jillian E Lauer, Sibel D Ilksoy, Stella F Lourenco
Infants exhibit visual preferences for gender-typed objects (e.g., dolls, toy vehicles) that parallel the gender-typed play preferences of preschool-aged children, but the developmental stability of individual differences in early emerging gender-typed preferences has not yet been characterized. In the present study, we examined the longitudinal association between infants' (N = 51) performance on an object-preference task, administered between 6 and 13 months of age, and their play preferences at 4 years of age...
November 20, 2017: Developmental Psychology
https://www.readbyqxmd.com/read/29154629/emergent-perception-of-gaze-direction-across-time
#4
Diana Mihalache, Laurel A Gaeddert, Timothy D Sweeny
To determine where another person is looking, the visual system engages a process of emergent integration, pooling information across space from both the head and eyes. Gaze is dynamic, however, and in order to achieve a temporally stabilized metric of a person's direction of attention, this integrative process might also occur across time. Here, we tested and confirmed this prediction. Even when seen separately and in succession, the rotation of a head attracted the perceived gaze of a pair of eyes. This integration depended on temporal continuity-attraction decayed with longer delays between the face parts and prolonged viewing of the head reduced integration...
November 20, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/29152972/defect-engineering-in-mose2-for-hydrogen-evolution-reaction-from-point-defects-to-edges
#5
Haibo Shu, Dong Zhou, Feng Li, Dan Cao, Xiaoshuang Chen
Superior catalytic activity and high chemical stability of inexpensive electrocatalysts for the hydrogen evolution reaction (HER) are crucial to the large-scale production of hydrogen from water. The nonprecious two-dimensional (2D) MoSe2 materials are emerged as a potential candidate, and the improvement of their catalytic activity depends on the optimization of active reaction sites at both the edges and the basal plane. Herein, the structural stability, electrocatalytic activity and HER mechanisms on a series of MoSe2 catalytic structures including of point defects, holes, and edges have been explored by using first-principles calculations...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29151862/profiling-the-immunome-of-little-brown-myotis-provides-a-yardstick-for-measuring-the-genetic-response-to-white-nose-syndrome
#6
Michael E Donaldson, Christina M Davy, Craig K R Willis, Scott McBurney, Allysia Park, Christopher J Kyle
White-nose syndrome (WNS) has devastated populations of hibernating bats in eastern North America, leading to emergency conservation listings for several species including the previously ubiquitous little brown myotis (Myotis lucifugus). However, some bat populations near the epicenter of the WNS panzootic appear to be stabilizing after initial precipitous declines, which could reflect a selective immunogenetic sweep. To investigate the hypothesis that WNS exerts significant selection on the immunome of affected bat populations, we developed a novel, high-throughput sequence capture assay targeting 138 adaptive, intrinsic, and innate immunity genes of putative adaptive significance, as well as their respective regulatory regions (~370 kbp of genomic sequence/individual)...
December 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/29150511/sulfolobus-acidocaldarius-uptakes-pentoses-via-a-cut2-type-abc-transporter-and-metabolizes-them-through-the-aldolase-independent-weimberg-pathway
#7
Michaela Wagner, Lu Shen, Andreas Albersmeier, Nienke van der Kolk, Sujin Kim, Jaeho Cha, Christopher Bräsen, Jörn Kalinowski, Bettina Siebers, Sonja-Verena Albers
Sulfolobus spp. possess a great metabolic versatility and grow heterotrophically on various carbon sources such as different sugars and peptides. Known sugar transporters in Archaea predominantly belong to ABC transport systems. Although several ABC transporters for sugar uptake have been characterized in the crenarchaeon Sulfolobus solfataricus, only one homologue of these transporters, the maltose/maltooligomer transporter, could be identified in the closely related Sulfolobus acidocaldarius Comparison of the transcriptome of S...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29150509/the-tape-measure-protein-is-involved-in-the-heat-stability-of-lactococcus-lactis-phages
#8
Hany Geagea, Simon J Labrie, Muriel Subirade, Sylvain Moineau
Virulent lactococcal phages are still a major risk for milk fermentation processes as they may lead to slowdowns and low quality fermented dairy products, particularly cheeses. Some of the phage control strategies used by the industry rely on heat treatments. Recently, a few Lactococcus lactis phages were found to be highly thermo-resistant. To identify the genetic determinant(s) responsible for the thermal resistance of lactococcal phages, we used the virulent phage CB14 (sk1virus/936 group) to select for phage mutants with increased heat stability...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29149842/italian-version-of-nursing-students-perception-of-instructor-caring-i-nspic-assessment-of-reliability-and-validity
#9
C Arrigoni, M Puci, A M Grugnetti, L Collivasone, E Fenizia, P Borrelli, E Vellone, R Alvaro, M Piredda, M G De Marinis
BACKGROUND: Clinical experience is an essential component of nursing education since it provides students with the opportunity to construct and develop clinical competencies. Instructor caring is a pivotal facilitator at the forefront of clinical education, playing a key and complex educating role in clinical sectors. For these reasons the aims of this study was to assess the validity and reliability of the Italian version of NSPIC (I-NSPIC). METHODS: A validation multicentre study was conducted in three different Italian universities...
November 17, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/29149347/signal-recognition-particle-binds-to-translating-ribosomes-before-emergence-of-a-signal-anchor-sequence
#10
Evan Mercier, Wolf Holtkamp, Marina V Rodnina, Wolfgang Wintermeyer
The bacterial signal recognition particle (SRP) is part of the machinery that targets ribosomes synthesizing membrane proteins to membrane-embedded translocons co-translationally. Recognition of nascent membrane proteins occurs by virtue of a hydrophobic signal-anchor sequence (SAS) contained in the nascent chain, usually at the N terminus. Here we use fluorescence-based stopped-flow to monitor SRP-ribosome interactions with actively translating ribosomes while an SRP substrate is synthesized and emerges from the peptide exit tunnel...
November 16, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29148789/amphiphilic-n-heterocyclic-carbene-stabilized-gold-nanoparticles-and-their-self-assembly-in-polar-solvents
#11
Mina R Narouz, Chien-Hung Li, Ali Nazemi, Cathleen M Crudden
Soft matter-directed self-assembly of amphiphilic inorganic nanoparticles (NPs) has recently emerged as a promising approach to access NP ensembles with superior collective properties. While thiol-terminated molecules are primarily employed to tether the amphiphilic ligand to the metal, serious concerns remain regarding the stabilities of the resulting NPs and their corresponding superstructures. As an alternative to such ligands, we report the first example of amphiphilic N-heterocyclic carbene (NHC)-functionalized gold nanoparticles (AuNPs)...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29148053/effective-inactivation-of-a-wide-range-of-viruses-by-pasteurization
#12
Albrecht Gröner, Connie Broumis, Randel Fang, Thomas Nowak, Birgit Popp, Wolfram Schäfer, Nathan J Roth
BACKGROUND: Careful selection and testing of plasma reduces the risk of blood-borne viruses in the starting material for plasma-derived products. Furthermore, effective measures such as pasteurization at 60°C for 10 hours have been implemented in the manufacturing process of therapeutic plasma proteins such as human albumin, coagulation factors, immunoglobulins, and enzyme inhibitors to inactivate blood-borne viruses of concern. A comprehensive compilation of the virus reduction capacity of pasteurization is presented including the effect of stabilizers used to protect the therapeutic protein from modifications during heat treatment...
November 16, 2017: Transfusion
https://www.readbyqxmd.com/read/29147940/interaction-of-proteins-with-ionic-liquid-alcohol-and-dmso-and-in-situ-generation-of-gold-nano-clusters-in-a-cell
#13
REVIEW
Somen Nandi, Sridip Parui, Ritaban Halder, Biman Jana, Kankan Bhattacharyya
In this review, we give a brief overview on how the interaction of proteins with ionic liquids, alcohols and dimethyl sulfoxide (DMSO) influences the stability, conformational dynamics and function of proteins/enzymes. We present experimental results obtained from fluorescence correlation spectroscopy on the effect of ionic liquid or alcohol or DMSO on the size (more precisely, the diffusion constant) and conformational dynamics of lysozyme, cytochrome c and human serum albumin in aqueous solution. The interaction of ionic liquid with biomolecules (e...
November 16, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/29147500/pressure-induced-dramatic-changes-in-organic-inorganic-halide-perovskites
#14
Xujie Lü, Wenge Yang, Quanxi Jia, Hongwu Xu
Organic-inorganic halide perovskites have emerged as a promising family of functional materials for advanced photovoltaic and optoelectronic applications with high performances and low costs. Various chemical methods and processing approaches have been employed to modify the compositions, structures, morphologies, and electronic properties of hybrid perovskites. However, challenges still remain in terms of their stability, the use of environmentally unfriendly chemicals, and the lack of an insightful understanding into structure-property relationships...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29145966/outcome-evaluation-of-staged-treatment-for-bicondylar-tibial-plateau-fractures
#15
Vincenzo Giordano, Ney Pecegueiro do Amaral, Hilton A Koch, Rodrigo Pires E Albuquerque, Felipe Serrão de Souza, José Félix Dos Santos Neto
BACKGROUND: The universal accepted strategy for treating high-energy tibial plateau fractures remains a topic of ongoing debate. The challenge for the practicing orthopaedic trauma surgeon is to provide anatomical articular fracture reduction, with successfully managing the complex soft-tissue injury that is commonly present at patient admission. The primary aim of the actual study was to evaluate the results of a staged protocol for the treatment of high-energy bicondylar tibial plateau fractures...
October 2017: Injury
https://www.readbyqxmd.com/read/29144733/a-mechanism-for-symmetry-breaking-and-shape-control-in-single-crystal-gold-nanorods
#16
Michael J Walsh, Wenming Tong, Hadas Katz-Boon, Paul Mulvaney, Joanne Etheridge, Alison M Funston
The phenomenon of symmetry breaking-in which the order of symmetry of a system is reduced despite manifest higher-order symmetry in the underlying fundamental laws-is pervasive throughout science and nature, playing a critical role in fields ranging from particle physics and quantum theory to cosmology and general relativity. For the growth of crystals, symmetry breaking is the crucial step required to generate a macroscopic shape that has fewer symmetry elements than the unit cell and/or seed crystal from which it grew...
November 16, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29144411/nucleic-acid-aptamers-emerging-applications-in-medical-imaging-nanotechnology-neurosciences-and-drug-delivery
#17
REVIEW
Pascal Röthlisberger, Cécile Gasse, Marcel Hollenstein
Recent progresses in organic chemistry and molecular biology have allowed the emergence of numerous new applications of nucleic acids that markedly deviate from their natural functions. Particularly, DNA and RNA molecules-coined aptamers-can be brought to bind to specific targets with high affinity and selectivity. While aptamers are mainly applied as biosensors, diagnostic agents, tools in proteomics and biotechnology, and as targeted therapeutics, these chemical antibodies slowly begin to be used in other fields...
November 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29144392/design-and-development-of-a-novel-upper-limb-cycling-prosthesis
#18
Akira Tiele, Shivam Soni-Sadar, Jack Rowbottom, Shilen Patel, Edward Mathewson, Samuel Pearson, David Hutchins, John Head, Stephen Hutchins
The rise in popularity of the Paralympics in recent years has created a need for effective, low-cost sports-prosthetic devices for upper-limb amputees. There are various opportunities for lower-limb amputees to participate in cycling; however, there are only few options for those with upper-limb amputations. If the individual previously participated in cycling, a cycling-specific prosthesis could allow these activities to be integrated into rehabilitation methods. This article describes the processes involved with designing, developing and manufacturing such a prosthesis...
November 16, 2017: Bioengineering
https://www.readbyqxmd.com/read/29144144/structural-emergence-in-particle-dispersions
#19
Andrew Mulderig, Gregory Beaucage, Karsten Vogtt, Hanqiu Jiang, Yan Jin, Lisa Clapp, Donald Henderson
Particle dispersions, such as pigment-based inks, comprise weakly bound, milled nanoparticles. The properties of these pigments depend on both their chemical composition, as well as a rather complex structural hierarchy, which emerges from these dispersions. The emergence of structure under semi-dilute conditions is related to the structure of the dilute particles, the particle spacing (mesh size), processing history, and the interaction potential. Kinetic simulations could predict such emergence using these input parameters...
November 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29144072/relapse-and-cytogenetic-evolution-in-myeloid-neoplasms
#20
Natalie Ertz-Archambault, Katalin Kelemen
Based on the current WHO Classification of Myeloid Neoplasms, cytogenetic findings play a central role in the diagnostic classification of the myeloid malignancies. Cytogenetic abnormalities detected at primary diagnosis may change over time. Karyotype changes can be characterized as cytogenetic evolution, cytogenetic regression or a combination of both. While the exact mechanism of cytogenetic evolution is not completely understood, the process of cytogenetic evolution is not random, but follows different, and often disease-specific patterns during progression and relapse of myeloid neoplasms...
December 2017: Panminerva Medica
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