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https://www.readbyqxmd.com/read/28092224/visual-map-and-instruction-based-bicycle-navigation-a-comparison-of-effects-on-behaviour
#1
Dick de Waard, Frank Westerhuis, Danielle Joling, Stella Weiland, Ronja Stadtbäumer, Leonie Kaltofen
Cycling with a classic paper map was compared with navigating with a moving map displayed on a smartphone, and with auditory, and visual turn-by-turn route guidance. Spatial skills were found to be related to navigation performance, however only when navigating from a paper or electronic map, not with turn-by-turn (instruction based) navigation. While navigating, 25% of the time cyclists fixated at the devices that present visual information. Navigating from a paper map required most mental effort and both young and older cyclists preferred electronic over paper map navigation...
January 16, 2017: Ergonomics
https://www.readbyqxmd.com/read/28091557/the-same-oculomotor-vermal-purkinje-cells-encode-the-different-kinematics-of-saccades-and-of-smooth-pursuit-eye-movements
#2
Zongpeng Sun, Aleksandra Smilgin, Marc Junker, Peter W Dicke, Peter Thier
Saccades and smooth pursuit eye movements (SPEM) are two types of goal-directed eye movements whose kinematics differ profoundly, a fact that may have contributed to the notion that the underlying cerebellar substrates are separated. However, it is suggested that some Purkinje cells (PCs) in the oculomotor vermis (OMV) of monkey cerebellum may be involved in both saccades and SPEM, a puzzling finding in view of the different kinematic demands of the two types of eye movements. Such 'dual' OMV PCs might be oddities with little if any functional relevance...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28090085/prediction-and-real-time-compensation-of-qubit-decoherence-via-machine-learning
#3
Sandeep Mavadia, Virginia Frey, Jarrah Sastrawan, Stephen Dona, Michael J Biercuk
The wide-ranging adoption of quantum technologies requires practical, high-performance advances in our ability to maintain quantum coherence while facing the challenge of state collapse under measurement. Here we use techniques from control theory and machine learning to predict the future evolution of a qubit's state; we deploy this information to suppress stochastic, semiclassical decoherence, even when access to measurements is limited. First, we implement a time-division multiplexed approach, interleaving measurement periods with periods of unsupervised but stabilised operation during which qubits are available, for example, in quantum information experiments...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28089775/degenerative-effects-of-cobalt-chloride-treatment-on-neurons-and-microglia-in-a-porcine-retina-organ-culture-model
#4
S Kuehn, J Hurst, F Rensinghoff, T Tsai, S Grauthoff, Y Satgunarajah, H B Dick, S Schnichels, S C Joachim
In order to understand the pathological processes of retinal diseases, experimental models are necessary. Cobalt, as part of the vitamin B12 complex, is important for neuronal integrity. However, it is known that high quantities of cobalt induce cytotoxic mechanisms via hypoxia mimicry. Therefore, we tested the degenerative effect of cobalt chloride (CoCl2) on neurons and microglia in a porcine retina organ culture model. Organotypic cultures of porcine retinas were cultured and treated with different concentrations of CoCl2 (0, 100, 300 and 500 μM) for 48 h...
January 12, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28089618/24-hour-protein-arginine-and-citrulline-metabolism-in-fed-critically-ill-children-a-stable-isotope-tracer-study
#5
Carlijn T I de Betue, Xiomara C Garcia Casal, Dick A van Waardenburg, Stephen M Schexnayder, Koen F M Joosten, Nicolaas E P Deutz, Marielle P K J Engelen
BACKGROUND & AIMS: The reference method to study protein and arginine metabolism in critically ill children is measuring plasma amino acid appearances with stable isotopes during a short (4-8 h) time period and extrapolate results to 24-h. However, 24-h measurements may be variable due to critical illness related factors and a circadian rhythm could be present. Since only short duration stable isotope studies in critically ill children have been conducted before, the aim of this study was to investigate 24-h appearance of specific amino acids representing protein and arginine metabolism, with stable isotope techniques in continuously fed critically ill children...
January 4, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28087128/intranasal-oxytocin-to-prevent-posttraumatic-stress-disorder-symptoms-a-randomized-controlled-trial-in-emergency-department-patients
#6
Mirjam van Zuiden, Jessie L Frijling, Laura Nawijn, Saskia B J Koch, J Carel Goslings, Jan S Luitse, Tessa H Biesheuvel, Adriaan Honig, Dick J Veltman, Miranda Olff
BACKGROUND: There are currently few preventive interventions available for posttraumatic stress disorder (PTSD). Intranasal oxytocin administration early after trauma may prevent PTSD, because oxytocin administration was previously found to beneficially impact PTSD vulnerability factors, including neural fear responsiveness, peripheral stress reactivity, and socioemotional functioning. Therefore, we investigated the effects of intranasal oxytocin administration early after trauma on subsequent clinician-rated PTSD symptoms...
December 8, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/28080078/what-to-do-when-scalar-invariance-fails-the-extended-alignment-method-for-multi-group-factor-analysis-comparison-of-latent-means-across-many-groups
#7
Herbert W Marsh, Jiesi Guo, Philip D Parker, Benjamin Nagengast, Tihomir Asparouhov, Bengt Muthén, Theresa Dicke
Scalar invariance is an unachievable ideal that in practice can only be approximated; often using potentially questionable approaches such as partial invariance based on a stepwise selection of parameter estimates with large modification indices. Study 1 demonstrates an extension of the power and flexibility of the alignment approach for comparing latent factor means in large-scale studies (30 OECD countries, 8 factors, 44 items, N = 249,840), for which scalar invariance is typically not supported in the traditional confirmatory factor analysis approach to measurement invariance (CFA-MI)...
January 12, 2017: Psychological Methods
https://www.readbyqxmd.com/read/28078808/minimum-sample-sizes-for-population-genomics-an-empirical-study-from-an-amazonian-plant-species
#8
Alison G Nazareno, Jordan B Bemmels, Christopher W Dick, Lúcia G Lohmann
High throughput DNA sequencing facilitates the analysis of large portions of the genome in non-model organisms, ensuring high accuracy of population genetic parameters. However, empirical studies evaluating the appropriate sample size for these kinds of studies are still scarce. In this study, we use double digest restriction associated DNA sequencing (ddRADseq) to recover thousands of single nucleotide polymorphisms (SNPs) for two physically isolated populations of Amphirrhox longifolia (Violaceae), a non-model plant species for which no reference genome is available...
January 12, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28078710/cancer-stem-cells-cscs-in-melanoma-there-s-smoke-but-is-there-fire
#9
REVIEW
Constance E Brinckerhoff
Cancer stem cells (CSCs), also called Tumor Initiating Cells (TICs), can be defined as cancer cells that are present within solid tumors or hematological cancers, which have characteristics associated with normal stem cells, but which can give rise to all cell types found in a particular cancer sample. CSCs, therefore, are transformed stem cells, which can self-renew, differentiate into diverse progenies, and drive continuous tumor growth. (Villani et al. 2015) (Zhou et al., 2009)(Kreso & Dick, 2014)(Schatton et al...
January 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28078682/population-pharmacokinetics-of-intravenous-clonidine-for-sedation-during-pediatric-extracorporeal-membrane-oxygenation-ecmo-and-continuous-veno-venous-hemofiltration-cvvh
#10
Niina Kleiber, Ron A A Mathôt, Maurice J Ahsman, Enno D Wildschut, Dick Tibboel, Saskia N de Wildt
AIMS: Clonidine is used for sedation in the pediatric intensive care unit. Extracorporeal membrane oxygenation (ECMO) provides temporary support if respiratory and cardiac function is threatened. ECMO influences the pharmacokinetics of drugs. Clonidine during pediatric ECMO cannot be effectively titrated as PK data are lacking. The aim of this study is to describe clonidine PK in a particular ECMO system and propose dosing guidelines for children on this particular ECMO circuit. METHODS: All children below the age of 18 who received clonidine during ECMO were eligible...
January 12, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28077473/a-joint-ers-ats-policy-statement-what-constitutes-an-adverse-health-effect-of-air-pollution-an-analytical-framework
#11
George D Thurston, Howard Kipen, Isabella Annesi-Maesano, John Balmes, Robert D Brook, Kevin Cromar, Sara De Matteis, Francesco Forastiere, Bertil Forsberg, Mark W Frampton, Jonathan Grigg, Dick Heederik, Frank J Kelly, Nino Kuenzli, Robert Laumbach, Annette Peters, Sanjay T Rajagopalan, David Rich, Beate Ritz, Jonathan M Samet, Thomas Sandstrom, Torben Sigsgaard, Jordi Sunyer, Bert Brunekreef
The American Thoracic Society has previously published statements on what constitutes an adverse effect on health of air pollution in 1985 and 2000. We set out to update and broaden these past statements that focused primarily on effects on the respiratory system. Since then, many studies have documented effects of air pollution on other organ systems, such as on the cardiovascular and central nervous systems. In addition, many new biomarkers of effects have been developed and applied in air pollution studies...
January 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28077457/systems-biology-derived-biomarkers-to-predict-progression-of-renal-function-decline-in-type-2-diabetes-mellitus
#12
Gert Mayer, Hiddo J L Heerspink, Constantin Aschauer, Andreas Heinzel, Georg Heinze, Alexander Kainz, Judith Sunzenauer, Paul Perco, Dick de Zeeuw, Peter Rossing, Michelle Pena, Rainer Oberbauer
OBJECTIVE: Chronic kidney disease (CKD) in diabetes has a complex molecular and likely multifaceted pathophysiology. We aimed to validate a panel of biomarkers identified using a systems biology approach to predict the individual decline of estimated glomerular filtration rate (eGFR) in a large group of patients with type 2 diabetes mellitus and CKD at various stages. RESEARCH DESIGN AND METHODS: We used publicly available "omics" data to develop a molecular process model of CKD in diabetes and identified a representative parsimonious set of nine molecular biomarkers: chitinase 3-like protein 1, growth hormone 1, hepatocyte growth factor, matrix metalloproteinase (MMP) 2, MMP7, MMP8, MMP13, tyrosine kinase, and tumor necrosis factor receptor-1...
January 11, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28076354/where-have-all-the-giants-gone-how-animals-deal-with-the-problem-of-size
#13
Taylor J M Dick, Christofer J Clemente
The survival of both the hunter and the hunted often comes down to speed. Yet how fast an animal can run is intricately linked to its size, such that the fastest animals are not the biggest nor the smallest. The ability to maintain high speeds is dependent on the body's capacity to withstand the high stresses involved with locomotion. Yet even when standing still, scaling principles would suggest that the mechanical stress an animal feels will increase in greater demand than its body can support. So if big animals want to be fast, they must find solutions to overcome these high stresses...
January 2017: PLoS Biology
https://www.readbyqxmd.com/read/28073580/drug-information-by-public-health-and-regulatory-institutions-results-of-an-8-country-survey-in-europe
#14
Giulio Formoso, Maria Font-Pous, Wolf-Dieter Ludwig, David Phizackerley, Dick Bijl, Juan Erviti, Blanka Pospíšilová, Jean Louis Montastruc
PURPOSE: To evaluate the framework of drug information produced by public health and regulatory institutions in Europe. MATERIALS AND METHODS: We carried out a short survey asking editors of ISDB bulletins of the European region to indicate the main sources of drug information provided by public health and regulatory authorities in their countries, the specific kind of information produced and their opinions about strengths and weaknesses of such information. The availability of evaluations about the added therapeutic value of drugs and of tools facilitating the implementation of such information were particularly addressed and checked on the websites of those institutions...
December 29, 2016: Health Policy
https://www.readbyqxmd.com/read/28073157/comparison-of-parent-peer-psychiatric-and-cannabis-use-influences-across-stages-of-offspring-alcohol-involvement-evidence-from-the-coga-prospective-study
#15
Kathleen K Bucholz, Vivia V McCutcheon, Arpana Agrawal, Danielle M Dick, Victor M Hesselbrock, John R Kramer, Samuel Kuperman, John I Nurnberger, Jessica E Salvatore, Marc A Schuckit, Laura J Bierut, Tatiana M Foroud, Grace Chan, Michie Hesselbrock, Jacquelyn L Meyers, Howard J Edenberg, Bernice Porjesz
BACKGROUND: All stages of development of alcohol use disorder (AUD) have not been equally studied. While initiation of drinking has been given considerable attention, other stages have not been as thoroughly investigated. It is not clear whether the same factors are associated consistently across early and late transitions in AUD involvement. High-risk family samples that are enriched for AUD vulnerability and transitions in AUD development offer an opportunity to examine influences across multiple stages of AUD development...
January 10, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28070124/an-endophenotype-approach-to-the-genetics-of-alcohol-dependence-a-genome-wide-association-study-of-fast-beta-eeg-in-families-of-african-ancestry
#16
J L Meyers, J Zhang, J C Wang, J Su, S I Kuo, M Kapoor, L Wetherill, S Bertelsen, D Lai, J E Salvatore, C Kamarajan, D Chorlian, A Agrawal, L Almasy, L Bauer, K K Bucholz, G Chan, V Hesselbrock, L Koganti, J Kramer, S Kuperman, N Manz, A Pandey, M Seay, D Scott, R E Taylor, D M Dick, H J Edenberg, A Goate, T Foroud, B Porjesz
Fast beta (20-28 Hz) electroencephalogram (EEG) oscillatory activity may be a useful endophenotype for studying the genetics of disorders characterized by neural hyperexcitability, including substance use disorders (SUDs). However, the genetic underpinnings of fast beta EEG have not previously been studied in a population of African-American ancestry (AA). In a sample of 2382 AA individuals from 482 families drawn from the Collaborative Study on the Genetics of Alcoholism (COGA), we performed a genome-wide association study (GWAS) on resting-state fast beta EEG power...
January 10, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28069761/functional-and-quantitative-mri-mapping-of-somatomotor-representations-of-human-supralaryngeal-vocal-tract
#17
Daniel Carey, Saloni Krishnan, Martina F Callaghan, Martin I Sereno, Frederic Dick
Speech articulation requires precise control of and coordination between the effectors of the vocal tract (e.g., lips, tongue, soft palate, and larynx). However, it is unclear how the cortex represents movements of and contact between these effectors during speech, or how these cortical responses relate to inter-regional anatomical borders. Here, we used phase-encoded fMRI to map somatomotor representations of speech articulations. Phonetically trained participants produced speech phones, progressing from front (bilabial) to back (glottal) place of articulation...
January 8, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28068447/corneal-ectasia-after-lasik-combined-with-prophylactic-corneal-cross-linking
#18
Suphi Taneri, Saskia Kiessler, Anika Rost, H Burkhard Dick
PURPOSE: To report a case of unilateral corneal ectasia following LASIK surgery combined with prophylactic corneal cross-linking (CXL) in a young patient. METHODS: Case report. RESULTS: Preoperative topography was unremarkable in both eyes with a minimum corneal thickness of 554 μm in the right eye and 546 μm in the left eye. Preoperative corrected distance visual acuity (CDVA) was 1.0 (20/20 Snellen) in both eyes with a refraction of +1...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28065918/exploiting-next-generation-sequencing-to-solve-the-haplotyping-puzzle-in-polyploids-a-simulation-study
#19
Ehsan Motazedi, Richard Finkers, Chris Maliepaard, Dick de Ridder
Haplotypes are the units of inheritance in an organism, and many genetic analyses depend on their precise determination. Methods for haplotyping single individuals use the phasing information available in next-generation sequencing reads, by matching overlapping single-nucleotide polymorphisms while penalizing post hoc nucleotide corrections made. Haplotyping diploids is relatively easy, but the complexity of the problem increases drastically for polyploid genomes, which are found in both model organisms and in economically relevant plant and animal species...
January 8, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/28062459/biofilm-composition-and-threshold-concentration-for-growth-of-legionella-pneumophila-on-surfaces-exposed-to-flowing-warm-tap-water-without-disinfectant
#20
Dick van der Kooij, Geo L Bakker, Ronald Italiaander, Harm R Veenendaal, Bart A Wullings
: Legionella pneumophila in potable-water installations poses a potential health risk, but quantitative information about its replication in biofilms in relation to water quality is scarce. Therefore, biofilm formation on surfaces of glass and chlorinated polyvinyl chloride (CPVC) in contact with tap water at 34-39°C was investigated under controlled hydraulic conditions in a model system inoculated with biofilm-grown L. pneumophila The biofilm on glass (average steady-state concentration: 23 ± 9 pg ATP cm(-2)) exposed to treated aerobic groundwater [0...
January 6, 2017: Applied and Environmental Microbiology
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