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https://www.readbyqxmd.com/read/29244875/effect-of-age-and-stereopsis-on-a-multiple-object-tracking-task
#1
Marjolaine Plourde, Marie-Eve Corbeil, Jocelyn Faubert
3D vision develops during childhood and tends to diminish after 65 years of age. It is still relatively unknown how stereopsis is used in more complex/ecological contexts such as when walking about in crowds where objects are in motion and occlusions occur. One task that shares characteristics with the requirements for processing dynamic crowds is the multiple object-tracking task (MOT). In the present study we evaluated the impact of stereopsis on a MOT task as a function of age. A total of 60 observers consisting of three groups of 20 subjects (7-12 years old, 18-40 years old and 65 years and older) completed the task in both conditions (with and without stereoscopic effects)...
2017: PloS One
https://www.readbyqxmd.com/read/29242099/downregulation-of-circulating-mots-c-levels-in-patients-with-coronary-endothelial-dysfunction
#2
Qing Qin, Silvia Delrio, Junxiang Wan, R Jay Widmer, Pinchas Cohen, Lilach O Lerman, Amir Lerman
BACKGROUND: MOTS-c is one of the newly identified mitochondrial-derived peptides which play a role in regulating metabolic homeostasis. The current study aimed to investigate whether circulating MOTS-c levels are also associated with endothelial dysfunction(ED) in patients without significant structural coronary lesions. METHODS: Forty patients undergoing coronary angiography and endothelial function testing for clinical indications of recurrent angina with no structural coronary lesions were included in the study...
December 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29238912/hue-distinctiveness-overrides-category-in-determining-performance-in-multiple-object-tracking
#3
Mengdan Sun, Xuemin Zhang, Lingxia Fan, Luming Hu
The visual distinctiveness between targets and distractors can significantly facilitate performance in multiple object tracking (MOT), in which color is a feature that has been commonly used. However, the processing of color can be more than "visual." Color is continuous in chromaticity, while it is commonly grouped into discrete categories (e.g., red, green). Evidence from color perception suggested that color categories may have a unique role in visual tasks independent of its chromatic appearance. Previous MOT studies have not examined the effect of chromatic and categorical distinctiveness on tracking separately...
December 13, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29227799/cognitive-function-after-status-epilepticus-versus-after-multiple-generalized-tonic-clonic-seizures
#4
Kjersti N Power, Arne Gramstad, Nils Erik Gilhus, Karl Ove Hufthammer, Bernt A Engelsen
OBJECTIVES: Status epilepticus (SE) is considered a risk for cognitive impairment. Studies have indicated that SE cause more cognitive decline than multiple lifetime generalized tonic clonic (GTC) seizures. The aim of the study was to investigate whether patients suffering from SE or from multiple lifetime GTC seizures have cognitive dysfunction, and if the disabilities differ between these groups. MATERIALS AND METHODS: Patients suffering from SE were evaluated shortly after the clinical post-ictal phase and again after one year...
November 28, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29212086/comparative-analyses-of-transport-proteins-encoded-within-the-genomes-of-bdellovibrio-bacteriovorus-hd100-and-bdellovibrio-exovorus-jss
#5
Fereshteh Heidari Tajabadi, Arturo Medrano-Soto, Masoud Ahmadzadeh, Gholamreza Salehi Jouzani, Milton H Saier
Bdellovibrio, δ-proteobacteria, including B. bacteriovorus (Bba) and B. exovorus (Bex), are obligate predators of other Gram-negative bacteria. While Bba grows in the periplasm of the prey cell, Bex grows externally. We have analyzed and compared the transport proteins of these 2 organisms based on the current contents of the Transporter Classification Database (TCDB; www.tcdb.org). Bba has 103 transporters more than Bex, 50% more secondary carriers, and 3 times as many MFS carriers. Bba has far more metabolite transporters than Bex as expected from its larger genome, but there are 2 times more carbohydrate uptake and drug efflux systems, and 3 times more lipid transporters...
December 7, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29184508/non-motorized-treadmill-running-is-associated-with-higher-cardiometabolic-demands-compared-with-overground-and-motorized-treadmill-running
#6
Robert B Edwards, Paul J Tofari, Stuart J Cormack, Douglas G Whyte
The aim of this study was to compare the cardiometabolic demands of running on a curved non-motorized treadmill (cNMT) with overground (OVR) and motorized treadmill (MOT) running. Fourteen trained male (n = 7) and female (n = 7) runners ([Formula: see text] 56.6 ± 4.0 mL.kg-1.min-1) participated in the study. Each experimental session consisted of 5 × 6-min bouts of running at progressively higher speeds, separated by 6-min rest (females 9-15 km.h-1; males 10.5-16.5 km.h-1). Oxygen consumption ([Formula: see text]) and heart rate (HR) during the last 2 min of each bout were measured using a portable metabolic cart...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29159571/comparing-eye-movements-during-position-tracking-and-identity-tracking-no-evidence-for-separate-systems
#7
Chia-Chien Wu, Jeremy M Wolfe
There is an ongoing debate as to whether people track multiple moving objects in a serial fashion or with a parallel mechanism. One recent study compared eye movements when observers tracked identical objects (Multiple Object Tracking-MOT task) versus when they tracked the identities of different objects (Multiple Identity Tracking-MIT task). Distinct eye-movement patterns were found and attributed to two separate tracking systems. However, the same results could be caused by differences in the stimuli viewed during tracking...
November 20, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29156293/fe-iii-sulfide-interaction-in-globins-characterization-and-quest-for-a-putative-fe-iv-sulfide-species
#8
Augustin C Mot, Cristina Bischin, Grigore Damian, Amr A A Attia, Emese Gal, Nicoleta Dina, Nicolae Leopold, Radu Silaghi-Dumitrescu
The present study reports findings regarding the contrast between H2S interaction with bovine hemoglobin (Hb) and horse heart myoglobin (Mb), in terms of binding and dissociation kinetics, affinities, and mechanism. At pH9.5, oxidation of ferric-sulfide adducts in presence of no free sulfide, using hexachloroiridate as oxidant is examined using stopped-flow UV-vis, EPR, vibrational spectroscopy and mass spectrometry. Oxidation of the ferric-sulfide adduct in such conditions occurs with a putative unstable Fe(IV)-sulfide adduct as intermediate that finally leads to a paramagnetic ferric species with distinct EPR features...
November 10, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29155488/effectiveness-of-a-virtual-reality-intervention-to-minimize-pediatric-stress-and-pain-intensity-during-venipuncture
#9
Joanna Piskorz, Marcin Czub
PURPOSE: Virtual reality (VR) technology is an effective tool in treatment of acute pain. Numerous studies show the effectiveness of this method both in a clinical context and in the laboratory. However, research results on the effectiveness of VR in pediatric venipuncture pain is not conclusive-not all studies report the analgesic effect of VR. In addition to testing effectiveness of VR, we also assess the usability of a novel hands-free interface. DESIGN AND METHODS: Patients of paediatric nephrology clinic (N = 38; mean age 11 years, range 7-17) participated in a posttest only between group quasi-experimental study...
November 20, 2017: Journal for Specialists in Pediatric Nursing: JSPN
https://www.readbyqxmd.com/read/29150081/turning-over-a-new-leaf-bacteriocins-going-green
#10
Maarten G K Ghequire, René De Mot
Bacteriocins are potent antibacterial proteins that selectively kill phylogenetic relatives of the producer. Their polymorphic nature, most prominent in γ-Proteobacteria, offers potential for the design of customized bacteriocin cocktails targeting Gram-negative pathogens. As an alternative to recombinant production in bacteria, they are eligible for large-scale production in plants.
November 14, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/29124862/catabolic-task-division-between-two-interchangeable-near-isogenic-subpopulations-co-existing-in-a-herbicide-degrading-bacterial-consortium-consequences-for-the-interspecies-consortium-metabolic-model
#11
Pieter Albers, Cédric Lood, Basak Özturk, Benjamin Horemans, Rob Lavigne, Vera van Noort, René De Mot, Kathleen Marchal, Aminael Sanchez-Rodriguez, Dirk Springael
Variovorax sp. WDL1 mediates hydrolysis of the herbicide linuron into 3,4-dichloroaniline (DCA) and N,O-dimethylhydroxylamine in a tripartite bacterial consortium with Comamonas testosteroni WDL7 and Hyphomicrobium sulfonivorans WDL6. Although strain WDL1 contains the dcaQTA1A2B operon for DCA oxidation, this conversion is mainly performed by WDL7. Phenotypic diversification observed in WDL1 cultures and scrutiny of the WDL1 genome suggest that WDL1 cultures consist of two dedicated subpopulations, i.e., a linuron-hydrolyzing subpopulation (Lin+DCA-) and a DCA-oxidizing subpopulation (Lin-DCA+)...
November 10, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/29109979/na-induced-structural-transition-of-motps-for-stator-assembly-of-the-bacillus-flagellar-motor
#12
Naoya Terahara, Noriyuki Kodera, Takayuki Uchihashi, Toshio Ando, Keiichi Namba, Tohru Minamino
The bacterial flagellar motor consists of a rotor and a dozen stator units and regulates the number of active stator units around the rotor in response to changes in the environment. The MotPS complex is a Na(+)-type stator unit in the Bacillus subtilis flagellar motor and binds to the peptidoglycan layer through the peptidoglycan-binding (PGB) domain of MotS to act as the stator. The MotPS complex is activated in response to an increase in the Na(+) concentration in the environment, but the mechanism of this activation has remained unknown...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29109321/epidemiological-and-clinicopathological-analysis-of-92-odontogenic-tumors-a-5-year-retrospective-study
#13
Ipsita Sharma, Deepa Venkatesh, Geetanjali Bawa, Syed Vaseemuddin, Amit Joseph, Jimmy K Sangtani
INTRODUCTION: Odontogenic tumors (OTs) are a heterogeneous group of lesions that are derived from odontogenic apparatus comprised of odontogenic epithelium, ectomesenchyme, and/ or mesenchymal elements. The OTs show marked geographical variation. This study was conducted to analyze the epidemiology and clinicopathological presentation of OTs based on age, sex, and site. MATERIALS AND METHODS: This study was conducted in Department of Oral Pathology and Microbiology...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29108030/genetic-parameters-for-semen-quality-and-quantity-traits-in-five-pig-lines
#14
D B D Marques, M S Lopes, M L W J Broekhuijse, S E F Guimarães, E F Knol, J W M Bastiaansen, F F Silva, P S Lopes
We aimed to estimate genetic parameters for semen quality and quantity traits as well as for within-boar variation of these traits to evaluate their inclusion in breeding goals. Genetic parameters were estimated within line using a multiple-trait (4 × 4) repeatability animal model fitted for 5 pig lines, considering 4 semen traits: sperm motility (MOT), sperm progressive motility (PROMOT), log-transformed number of sperm cells per ejaculate (lnN), and total morphological abnormalities (ABN). The within-boar variation of these traits was analyzed based on a multiple-trait (2 × 2) approach for SD and average (AVG) and a single-trait analysis for CV...
October 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/29098421/what-is-the-accuracy-of-frozen-section-in-the-diagnosis-of-mucinous-ovarian-tumours-a-9-year-review-of-performance-in-a-greek-tertiary-referral-centre
#15
Anastasios Tranoulis, Nikolaos Thomakos, Maria Sotiropoulou, Alexandros Rodolakis
PURPOSE: This retrospective study aimed to evaluate the diagnostic accuracy of the intra-operative frozen sections (FS) of mucinous ovarian tumours (mOT). METHODS: Between 2007 and 2015, a total of 105 mucinous ovarian samples were collected during laparotomy. The intra-operative FS accuracy was evaluated and potential factors correlated with increased inaccuracy assessed using both univariate and multivariate analysis. RESULTS: The overall FS accuracy was 82...
November 2, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29096170/mots-c-peptide-increases-survival-and-decreases-bacterial-load-in-mice-infected-with-mrsa
#16
Dongsheng Zhai, Zichen Ye, Yinghao Jiang, Chengming Xu, Banjun Ruan, Yuan Yang, Xiaoying Lei, An Xiang, Huanyu Lu, Zheng Zhu, Zhao Yan, Di Wei, Qingyang Li, Li Wang, Zifan Lu
Sepsis is a life-threatening disease characterized by uncontrolled inflammatory responses upon pathogen infections, especially for the antibiotic-resistant strains, such as Methicillin-resistant S. aureus (MRSA). Here we demonstrated that a Mitochondria-derived peptide (MOTS-c) could significantly improve the survival rate and decrease bacteria loads in MRSA-challenged mice, accompanied with declined levels of pro-inflammatory cytokines, such as TNF-α, IL-6 and IL-1β, but with increased level of anti-inflammatory cytokine IL-10...
December 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29021584/mortalin-deficiency-suppresses-fibrosis-and-induces-apoptosis-in-keloid-spheroids
#17
Won Jai Lee, Hyo Min Ahn, Youjin Na, Renu Wadhwa, JinWoo Hong, Chae-Ok Yun
Mortalin (Mot) is a mitochondrial chaperone of the heat shock protein 70 family and it's pro-proliferative and anti-apoptosis functions could be associated with keloid pathogenesis, and blocking of mortalin and its interaction with p53 might be a potential novel target for the treatment of keloid. Therefore, we generated mortalin-specific small hairpin (sh) RNAs (dE1-RGD/GFP/shMot) and introduced into keloid spheroids for examination of its apoptotic and anti-fibrotic effect. On keloid tissues, mortalin expression was higher than adjacent normal tissues and it's protein expressions were activated keloid fibroblasts (KFs)...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29016693/driving-simulator-scenarios-and-measures-to-faithfully-evaluate-risky-driving-behavior-a-comparative-study-of-different-driver-age-groups
#18
COMPARATIVE STUDY
Jesse Michaels, Romain Chaumillon, David Nguyen-Tri, Donald Watanabe, Pierro Hirsch, Francois Bellavance, Guillaume Giraudet, Delphine Bernardin, Jocelyn Faubert
To investigate the links between mental workload, age and risky driving, a cross-sectional study was conducted on a driving simulator using several established and some novel measures of driving ability and scenarios of varying complexity. A sample of 115 drivers was divided into three age and experience groups: young inexperienced (18-21 years old), adult experienced (25-55 years old) and older adult (70-86 years old). Participants were tested on three different scenarios varying in mental workload from low to high...
2017: PloS One
https://www.readbyqxmd.com/read/28994791/subcellular-fractionation-for-erk-activation-upon-mitochondrial-derived-peptide-treatment
#19
Su-Jeong Kim, Jialin Xiao, Pinchas Cohen, Kelvin Yen
Mitochondrial-derived peptides (MDPs) are a new class of peptides that are encoded by small open reading frames within other known genes of the mitochondrial genome. MDPs have a wide variety of biological effects such as protecting neurons from apoptosis, improving metabolic markers, and protecting cells from chemotherapy. Humanin was the first MDP to be discovered and is the most studied peptide among the MDP family. The membrane receptors and downstream signaling pathways of humanin have been carefully characterized...
September 25, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28949175/radio-frequency-magneto-optical-trapping-of-caf-with-high-density
#20
Loïc Anderegg, Benjamin L Augenbraun, Eunmi Chae, Boerge Hemmerling, Nicholas R Hutzler, Aakash Ravi, Alejandra Collopy, Jun Ye, Wolfgang Ketterle, John M Doyle
We demonstrate significantly improved magneto-optical trapping of molecules using a very slow cryogenic beam source and either rf modulated or dc magnetic fields. The rf magneto-optical trap (MOT) confines 1.0(3)×10^{5} CaF molecules at a density of 7(3)×10^{6}  cm^{-3}, which is an order of magnitude greater than previous molecular MOTs. Near Doppler-limited temperatures of 340(20)  μK are attained. The achieved density enables future work to directly load optical tweezers and create optical arrays for quantum simulation...
September 8, 2017: Physical Review Letters
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