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https://www.readbyqxmd.com/read/28934385/hearing-loss-without-overt-metabolic-acidosis-in-atp6v1b1-deficient-mrl-mice-a-new-genetic-model-for-non-syndromic-deafness-with-enlarged-vestibular-aqueducts
#1
Cong Tian, Leona H Gagnon, Chantal Longo-Guess, Ron Korstanje, Susan M Sheehan, Kevin K Ohlemiller, Angela D Schrader, Jaclynn M Lett, Kenneth R Johnson
Mutations of the human ATP6V1B1 gene cause distal renal tubular acidosis (dRTA; OMIM #267300) often associated with sensorineural hearing impairment; however, mice with a knockout mutation of Atp6v1b1 were reported to exhibit a compensated acidosis and normal hearing. We discovered a new spontaneous mutation (vortex, symbol vtx) of Atp6v1b1 in an MRL/MpJ (MRL) colony of mice. In contrast to the reported phenotype of the knockout mouse, which was developed on a primarily C57BL/6 (B6) strain background, MRL-Atp6v1b1vtx/vtx mutant mice exhibit profound hearing impairment, which is associated with enlarged endolymphatic compartments of the inner ear...
October 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28930947/the-mortality-ascent-hourly-risk-of-death-for-hemodynamically-unstable-trauma-patients-at-level-ii-versus-level-i-trauma-centers
#2
Juan P Herrera-Escobar, Arturo J Rios-Diaz, Cheryl Zogg, Lindsey L Wolf, Alyssa Harlow, Eric B Schneider, Zara Cooper, Carlos A Ordonez, Ali Salim, Adil H Haider
BACKGROUND: Severely injured trauma patients have higher in-hospital mortality at Level II versus Level I Trauma Centers (TCs). In order to better understand these differences, we sought to determine if there were any time-periods during which hemodynamically unstable trauma patients are at higher risk of death at Level II versus Level I TCs within the first 24 hours post-admission. STUDY DESIGN: Trauma patients aged 18-64 years, with Injury Severity Score ≥15, SBP <90 mmHg at admission, and treated at Level II or Level I TCs, were identified using the 2007-2012 National Trauma Data Bank...
September 20, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930435/new-triplet-sensitization-routes-for-photon-upconversion-thermally-activated-delayed-fluorescence-molecules-inorganic-nanocrystals-and-singlet-to-triplet-absorption
#3
Nobuhiro Yanai, Nobuo Kimizuka
Photon upconversion based on triplet-triplet annihilation (TTA-UC) has attracted much interest because of its possible applications to renewable energy production and biological fields. In particular, the UC of near-infrared (NIR) light to visible (vis) light is imperative to overcome the Shockley-Queisser limit of single-junction photovoltaic cells, and the efficiency of photocatalytic hydrogen production from water can also be improved with the aid of vis-to-ultraviolet (UV) UC. However, both processes have met limitations in the wavelength range, efficiency, and sensitivity for weak incident light...
September 20, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28929159/electric-field-controllable-magnetic-coupling-of-localized-spins-mediated-by-itinerant-electrons-a-toy-model
#4
Andrew Palii, Sergey Aldoshin, Boris Tsukerblat, Juan Modesto Clemente-Juan, Alejandro Gaita-Ariño, Eugenio Coronado
In this paper, we propose a toy model to describe the magnetic coupling between the localized spins mediated by the itinerant electron in partially delocalized mixed-valence (MV) systems. This minimal model takes into account the key interactions that are common for all such systems, namely, electron transfer in the valence-delocalized moiety and magnetic exchange between the localized spins and the delocalized electrons. The proposed descriptive model is exactly solvable which allows us to qualitatively and quantitatively discuss the main features of the whole class of partially delocalized MV systems...
September 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28927013/transcription-factors-responding-to-pb-stress-in-maize
#5
Yanling Zhang, Fei Ge, Fengxia Hou, Wenting Sun, Qi Zheng, Xiaoxiang Zhang, Langlang Ma, Jun Fu, Xiujing He, Huanwei Peng, Guangtang Pan, Yaou Shen
Pb can damage the physiological function of human organs by entering the human body via food-chain enrichment. Revealing the mechanisms of maize tolerance to Pb is critical for preventing this. In this study, a Pb-tolerant maize inbred line, 178, was used to analyse transcription factors (TFs) expressed under Pb stress based on RNA sequencing data. A total of 464 genes expressed in control check (CK) or Pb treatment samples were annotated as TFs. Among them, 262 differentially expressed transcription factors (DETs) were identified that responded to Pb treatment...
September 18, 2017: Genes
https://www.readbyqxmd.com/read/28926777/experience-as-knowledge-disability-distillation-and-reprogenetic-decision-making
#6
Felicity K Boardman
'Experiential knowledge' is increasingly recognised as an important influence on reproductive decision-making. 'Experiential knowledge of disability' in particular is a significant resource within prenatal testing/screening contexts, enabling prospective parents to imagine and appraise future lives affected by disability. However, the concept of 'experiential knowledge' has been widely critiqued for its idiosyncrasy, its impermanence and consequently its perceived inferiority to (medical) knowledge. This paper explores some of these key critiques of experiential knowledge through an analysis of its constitution and uses in the context of reproductive decision-making...
September 8, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28924306/refrigerant-performance-evaluation-including-effects-of-transport-properties-and-optimized-heat-exchangers
#7
Riccardo Brignoli, J Steven Brown, H Skye, Piotr A Domanski
Preliminary refrigerant screenings typically rely on using cycle simulation models involving thermodynamic properties alone. This approach has two shortcomings. First, it neglects transport properties, whose influence on system performance is particularly strong through their impact on the performance of the heat exchangers. Second, the refrigerant temperatures in the evaporator and condenser are specified as input, while real-life equipment operates at imposed heat sink and heat source temperatures; the temperatures in the evaporator and condensers are established based on overall heat transfer resistances of these heat exchangers and the balance of the system...
August 2017: Revue Internationale du Froid
https://www.readbyqxmd.com/read/28923541/interpreting-the-genomic-landscape-of-introgression
#8
REVIEW
Simon H Martin, Chris D Jiggins
Introgression, the transfer of genetic material between species through hybridisation, occurs in many taxa and has important consequences. Genomic studies allow us to characterise the landscape of introgression across the genome, shedding light on both its adaptive benefits and the incompatibilities that help to maintain species barriers. Studies taking a genome-wide view suggest that adaptive introgression may be common, but that introgressed variation between many species is selected against throughout much of the genome...
September 15, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28921977/photoinduced-bimolecular-electron-transfer-in-ionic-liquids
#9
Boning Wu, Mark Maroncelli, Edward W Castner
The present work seeks to better understand the role of solute diffusion and solvation dynamics on bimolecular electron transfer in ionic liquids (ILs). Steady-state and time-resolved measurements of the reductive fluorescence quenching of five fluorophores ("F") by six quenchers ("Q"; electron donors) are reported in acetonitrile and two ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide and trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)amide. Data were collected on 66 different F-Q-solvent systems, which span a 2...
September 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28920601/dynamics-of-coherence-localization-and-excitation-transfer-in-disordered-nanorings
#10
Alejandro D Somoza, Ke-Wei Sun, Rafael A Molina, Yang Zhao
Self-assembled supramolecular aggregates are excellent candidates for the design of efficient excitation transport devices. Both artificially prepared and natural photosynthetic aggregates in plants and bacteria present an important degree of disorder that is supposed to hinder excitation transport. Besides, molecular excitations couple to nuclear motion affecting excitation transport in a variety of ways. We present an exhaustive study of exciton dynamics in disordered nanorings with long-range interactions under the influence of a phonon bath taking the LH2 system of purple bacteria as a model...
September 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28919197/imported-poultry-meat-as-a-source-of-extended-spectrum-cephalosporin-resistant-cmy-2-producing-salmonella-heidelberg-and-s-minnesota-in-european-union-2014-2015
#11
Joana Campos, Joana Mourão, Leonor Silveira, Margarida Saraiva, Cristina Belo Correia, Ana Paula Maçãs, Luísa Peixe, Patrícia Antunes
Extended-spectrum cephalosporin (ESC)-resistant Salmonella has been described at low level in EU, nevertheless the increasing importation of poultry meat could be an important source of epidemic strains carrying ESC-resistant genes. We evaluated ESC resistance and characterized genetic platforms as well as the clonal relatedness of Salmonella isolates from poultry meat products imported into Portugal. All Salmonella isolates recovered from samples of fresh meat destined to be imported into the EU in the scope of Portuguese official border control between 2014 and 2015 were studied...
September 14, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28916332/assessing-the-use-of-assisted-reproductive-technology-in-the-united-states-by-non-united-states-residents
#12
Aaron D Levine, Sheree L Boulet, Roberta M Berry, Denise J Jamieson, Hillary B Alberta-Sherer, Dmitry M Kissin
OBJECTIVE: To study cross-border reproductive care (CBRC) by assessing the frequency and nature of assisted reproductive technology (ART) care that non-U.S. residents receive in the United States. DESIGN: Retrospective study of ART cycles reported to the Centers for Disease Control and Prevention's National ART Surveillance System (NASS) from 2006 to 2013. SETTING: Private and academic ART clinics. PATIENT(S): Patients who participated in ART cycles in the United States from 2006 to 2013...
August 31, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28914122/improving-health-in-prisons-from-evidence-to-policy-to-implementation-experiences-from-the-uk
#13
Jane Leaman, Anna Amelia Richards, Lynn Emslie, Eamonn Joseph O'Moore
Purpose The purpose of this paper is to understand the components of a high-quality prison healthcare system and the impact, ten-years on, of the transfer of accountability in England, from a justice ministry to a health ministry. Design/methodology/approach A rapid the evidence review was undertaken, which included a review of 82 papers and qualitative interviews with key informants. The concepts and themes identified were summarised and analysed through a framework analysis, designed to improve population outcomes and address health inequalities...
September 11, 2017: International Journal of Prisoner Health
https://www.readbyqxmd.com/read/28912579/interference-exact-radiative-transfer-equation
#14
Mikko Partanen, Teppo Häyrynen, Jani Oksanen
The Purcell effect, i.e., the modification of the spontaneous emission rate by optical interference, profoundly affects the light-matter coupling in optical resonators. Fully describing the optical absorption, emission, and interference of light hence conventionally requires combining the full Maxwell's equations with stochastic or quantum optical source terms accounting for the quantum nature of light. We show that both the nonlocal wave and local particle features associated with interference and emission of propagating fields in stratified geometries can be fully captured by local damping and scattering coefficients derived from the recently introduced quantized fluctuational electrodynamics (QFED) framework...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912528/extracellular-vesicles-derived-from-t-regulatory-cells-suppress-t-cell-proliferation-and-prolong-allograft-survival
#15
Sistiana Aiello, Federica Rocchetta, Lorena Longaretti, Silvia Faravelli, Marta Todeschini, Linda Cassis, Francesca Pezzuto, Susanna Tomasoni, Nadia Azzollini, Marilena Mister, Caterina Mele, Sara Conti, Matteo Breno, Giuseppe Remuzzi, Marina Noris, Ariela Benigni
We have previously shown that rat allogeneic DC, made immature by adenoviral gene transfer of the dominant negative form of IKK2, gave rise in-vitro to a unique population of CD4(+)CD25(-) regulatory T cells (dnIKK2-Treg). These cells inhibited Tcell response in-vitro, without needing cell-to-cell contact, and induced kidney allograft survival prolongation in-vivo. Deep insight into the mechanisms behind dnIKK2-Treg-induced suppression of Tcell proliferation remained elusive. Here we document that dnIKK2-Treg release extracellular vesicles (EV) riched in exosomes, fully accounting for the cell-contact independent immunosuppressive activity of parent cells...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911332/-we-are-toothless-and-hanging-but-optimistic-sub-county-managers-experiences-of-rapid-devolution-in-coastal-kenya
#16
Mary M Nyikuri, Benjamin Tsofa, Philip Okoth, Edwine W Barasa, Sassy Molyneux
BACKGROUND: In March 2013, Kenya transitioned from a centralized to a devolved system of governance. Within the health sector, this entailed the transfer of service provision functions to 47 newly formed semi-autonomous counties, while policy and regulatory functions were retained at the national level. The devolution process was rapid rather than progressive. METHODS: We conducted qualitative research within one county to examine the early experiences of devolution in the health sector...
September 15, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28911328/devolution-and-its-effects-on-health-workforce-and-commodities-management-early-implementation-experiences-in-kilifi-county-kenya
#17
Benjamin Tsofa, Catherine Goodman, Lucy Gilson, Sassy Molyneux
BACKGROUND: Decentralisation is argued to promote community participation, accountability, technical efficiency, and equity in the management of resources, and has been a recurring theme in health system reforms for several decades. In 2010, Kenya passed a new constitution that introduced 47 semi-autonomous county governments, with substantial transfer of responsibility for health service delivery from the central government to these counties. Focusing on two key elements of the health system, Human Resources for Health (HRH) and Essential Medicines and Medical Supplies (EMMS) management, we analysed the early implementation experiences of this major governance reform at county level...
September 15, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28911325/how-does-decentralisation-affect-health-sector-planning-and-financial-management-a-case-study-of-early-effects-of-devolution-in-kilifi-county-kenya
#18
Benjamin Tsofa, Sassy Molyneux, Lucy Gilson, Catherine Goodman
BACKGROUND: A common challenge for health sector planning and budgeting has been the misalignment between policies, technical planning and budgetary allocation; and inadequate community involvement in priority setting. Health system decentralisation has often been promoted to address health sector planning and budgeting challenges through promoting community participation, accountability, and technical efficiency in resource management. In 2010, Kenya passed a new constitution that introduced 47 semi-autonomous devolved county governments, and a substantial transfer of responsibility for healthcare from the central government to these counties...
September 15, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28910387/epstein-barr-virus-latent-membrane-protein-1-enhances-dendritic-cell-therapy-lymph-node-migration-activation-and-il-12-secretion
#19
James M Termini, Sachin Gupta, Francesca N Raffa, Elizabeth Guirado, Margaret A Fischl, Liguo Niu, Saravana Kanagavelu, Geoffrey W Stone
Dendritic cells (DC) are a promising cell type for cancer vaccines due to their high immunostimulatory capacity. However, improper maturation of DC prior to treatment may account for the limited efficacy of DC vaccine clinical trials. Latent Membrane Protein-1 (LMP1) of Epstein-Barr virus was examined for its ability to mature and activate DC as a gene-based molecular adjuvant for DC vaccines. DC were transduced with an adenovirus 5 vector (Ad5) expressing LMP1 under the control of a Tet-inducible promoter...
2017: PloS One
https://www.readbyqxmd.com/read/28910102/effects-of-charge-state-charge-distribution-and-structure-on-the-ion-mobility-of-protein-ions-in-helium-gas-results-from-trajectory-method-calculations
#20
Kenneth J Laszlo, Matthew F Bush
Collision cross section (Ω) values of gas-phase ions of proteins and protein complexes are used to probe the structures of the corresponding species in solution. Ions of many proteins exhibit increasing Ω values with increasing charge state, but most Ω values calculated for protein ions have used simple collision models that do not explicitly account for charge. Here we use a combination of ion mobility mass spectrometry experiments using helium gas and trajectory method calculations to characterize the extents to which increases in experimental Ω values with increasing charge state may be attributed to increased momentum transfer concomitant with enhanced long-range interactions between the protein ion and helium atoms...
September 14, 2017: Journal of Physical Chemistry. A
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