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https://www.readbyqxmd.com/read/28650854/recent-developments-in-deuterium-oxide-tracer-approaches-to-measure-rates-of-substrate-turnover-implications-for-protein-lipid-and-nucleic-acid-research
#1
Matthew S Brook, Daniel J Wilkinson, Philip J Atherton, Ken Smith
PURPOSE OF REVIEW: Methods that inform on dynamic metabolism that can be applied to clinical populations to understand disease progression and responses to therapeutic interventions are of great importance. This review perspective will highlight recent advances, development, and applications of the multivalent stable isotope tracer deuterium oxide (D2O) to the study of substrate metabolism with particular reference to protein, lipids, and nucleic acids, and how these methods can be readily applied within clinical and pharmaceutical research...
June 24, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28650512/elucidating-sequence-and-solvent-specific-design-targets-to-protect-and-stabilize-enzymes-for-biocatalysis-in-ionic-liquids
#2
K G Sprenger, J G Plaks, J L Kaar, J Pfaendtner
For many different frameworks, the structure, function, and dynamics of an enzyme is largely determined by the nature of its interactions with the surrounding host environment, thus a molecular level understanding of enzyme/host interactions is essential to the design of new processes and applications. Ionic liquid (IL) solvents are a popular class of solvents in which to study enzyme behavior, yet it is still not possible to predict how a given enzyme will behave in a given IL solvent. Furthermore, a dearth of experimental data with which to evaluate simulation force fields has prevented the full integration of experimental and computational techniques to gain a complete picture of enzyme/IL interactions...
June 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28650353/the-effect-of-hearing-loss-on-novel-word-learning-in-infant-and-adult-directed-speech
#3
V Susie Robertson, Deborah von Hapsburg, Jessica S Hay
OBJECTIVES: Relatively little is known about how young children with hearing impairment (HI) learn novel words in infant- and adult-directed speech (ADS). Infant-directed speech (IDS) supports word learning in typically developing infants relative to ADS. This study examined how children with normal hearing (NH) and children with HI learn novel words in IDS and ADS. It was predicted that IDS would support novel word learning in both groups of children. In addition, children with HI were expected to be less proficient word learners as compared with their NH peers...
June 22, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28649905/juvenile-idiopathic-arthritis-in-a-patient-with-previous-diagnosis-of-severe-congenital-lupus
#4
I H Rotstein Grein, W Armbrust, A M van der Molen, A van Royen-Kerkhof
Neonatal lupus (NL) is an acquired autoimmune disease of the newborn, caused by transplacental passage of the maternal autoantibodies anti SS-A/Ro and anti SS-B/La. When the clinical picture starts directly at birth, it is known as congenital lupus (CL). The clinical manifestations are variable. Except for cardiac involvement, the other manifestations tend to be benign, and resolve with the child's clearance of maternal antibodies. We report a patient who presented at birth with very severe involvement of the skin, and subsequent contractures of hands and feet, leading to functional impairment...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28649194/seeing-double-exploring-the-phenomenology-of-self-reported-absence-of-rivalry-in-bistable-pictures
#5
Elisa Filevich, Maxi Becker, Yuan-Hao Wu, Simone Kühn
Ambiguous images such as Rubin's vase-face can be interpreted in at least two different ways. These interpretations are typically taken to be mutually exclusive, and ambiguous images have thus served as models of perceptual competition. Here, we present data that challenges this view. In an online survey, we found that a large proportion of people within the general population reported that the two percepts were not competing but could be perceived simultaneously. Of those who reported that they could see both percepts simultaneously, we invited 17 participants to take part in a functional magnetic resonance imaging (fMRI) experiment...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28649113/american-av-edgar-dale-and-the-information-age-classroom
#6
Charles R Acland
This article demonstrates how the influential scholar Edgar Dale, alongside a generation of educational technologists, helped build an essential place for AV materials and pedagogical methods in the American classroom. It also shows that, for decades, the Payne Fund philanthropy supported multimedia research agendas that shaped ideas about teaching and technology, far beyond involvement in their famed studies on motion pictures and children in the 1930s. With his writings and research programs, Dale advanced concepts of media experience and systematicity, which came to be understood as common sense to the information society...
2017: Technology and Culture
https://www.readbyqxmd.com/read/28648995/when-the-ball-is-in-the-female-s-court-how-the-scramble-competition-mating-system-of-the-north-american-red-squirrel-has-shaped-male-physiology-and-testosterone-dynamics
#7
Rudy Boonstra, Adam Dušek, Jeffrey E Lane, Stan Boutin
Male reproductive success in most mammals is determined by their success in direct inter-male competition through aggression and conflict, resulting in female-defense mating systems being predominant. This is linked to male testosterone levels and its dynamics. However, in certain environments, a scramble-competition mating system has evolved, where female reproductive behavior takes precedence and male testosterone dynamics are unlikely to be related to inter-male competition. We studied the North American red squirrel (Tamiasciurus hudsonicus), a species with a well-established scramble-competition system...
June 22, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28648888/benchmarking-laminar-fmri-neuronal-spiking-and-synaptic-activity-during-top-down-and-bottom-up-processing-in-the-different-layers-of-cortex
#8
REVIEW
Matthew W Self, Timo van Kerkoerle, Rainer Goebel, Pieter R Roelfsema
High resolution laminar fMRI is beginning to probe responses in the different layers of cortex. What can we expect this exciting new technique to discover about cortical processing and how can we verify that it is producing an accurate picture of the underlying laminar differences in neural processing? This review will address our knowledge of laminar cortical circuitry gained from electrophysiological studies in macaque monkeys with a focus on the primary visual cortex, as this area has been most often targeted in both laminar electrophysiological and fMRI studies...
June 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28648570/brain-behavioral-adaptability-predicts-response-to-cognitive-behavioral-therapy-for-emotional-disorders-a-person-centered-event-related-potential-study
#9
Jonathan P Stange, Annmarie MacNamara, Amy E Kennedy, Greg Hajcak, K Luan Phan, Heide Klumpp
Single-trial-level analyses afford the ability to link neural indices of elaborative attention (such as the late positive potential [LPP], an event-related potential) with downstream markers of attentional processing (such as reaction time [RT]). This approach can provide useful information about individual differences in information processing, such as the ability to adapt behavior based on attentional demands ("brain-behavioral adaptability"). Anxiety and depression are associated with maladaptive information processing implicating aberrant cognition-emotion interactions, but whether brain-behavioral adaptability predicts response to psychotherapy is not known...
June 22, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28648561/exact-results-for-the-probability-and-stochastic-dynamics-of-fixation-in-the-wright-fisher-model
#10
Hassan Shafiey, David Waxman
In this work we consider fixation of an allele in a population. Fixation is key to understanding the way long-term evolutionary change occurs at the gene and molecular levels. Two basic aspects of fixation are: (i) the chance it occurs and (ii) the way the gene frequency progresses to fixation. We present exact results for both aspects of fixation for the Wright-Fisher model. We give the exact fixation probability for some different schemes of frequency-dependent selection. We also give the corresponding exact stochastic equation that generates frequency trajectories which ultimately fix...
June 22, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28647888/osteoimmunology-in-bone-fracture-healing
#11
REVIEW
Takehito Ono, Hiroshi Takayanagi
PURPOSE OF REVIEW: In the process of bone fracture healing, inflammation is thought to be an essential process that precedes bone formation and remodeling. We review recent studies on bone fracture healing from an osteoimmunological point of view. RECENT FINDINGS: Based on previous observations that many types of immune cells infiltrate into the bone injury site and release a variety of molecules, recent studies have addressed the roles of specific immune cell subsets...
June 24, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28647851/a-questionnaire-survey-of-radiological-diagnosis-and-management-of-renal-dysplasia-in-children
#12
Giovanni Montini, Marco Busutti, Fatos Yalcinkaya, Adrian S Woolf, Stefanie Weber
BACKGROUND: The condition called renal dysplasia is considered to be a frequent cause of chronic kidney disease in children. Formally, it is defined by histological parameters. In current nephrology practice, however, the appearance of the kidneys on ultrasound scanning is often used as a basis for the diagnosis. METHODS: The European Society for Pediatric Nephrology Working Group on Congenital Anomalies of the Kidney and Urinary Tract hypothesized that the current diagnostic approach with regard to renal dysplasia was not homogeneous...
June 24, 2017: Journal of Nephrology
https://www.readbyqxmd.com/read/28647846/attentional-processing-of-itch
#13
A I M van Laarhoven, S van Damme, A P M Lavrijsen, D M van Ryckeghem, G Crombez, A W M Evers
Itch is a prevalent somatosensory symptom that can be highly disabling, because it is likely to draw attention and, as a result, may interfere with the performance of daily activities. Yet, research experimentally investigating attention to itch is lacking. In this study we aimed to investigate attentional processing of itch using multiple behavioral attention tasks. Forty-one healthy participants performed (1) a modified Stroop task with itch-related words, (2) a dot-probe task with itch-related pictures, and (3) a recently developed somatosensory attention task in which the effect of experimentally induced itch on the localization of visual targets was examined...
June 24, 2017: Psychological Research
https://www.readbyqxmd.com/read/28647598/functional-brain-networks-during-picture-encoding-and-recognition-in-different-odor-contexts
#14
J L Reichert, M Ninaus, W Schuehly, C Hirschmann, D Bagga, V Schöpf
Contextual odors can serve as retrieval cues when applied during encoding and recall/recognition of information. To investigate the neuronal basis of these observations, we collected functional MRI data while participants (n=51) performed an encoding and recognition memory task during which odors (congruent: CO or incongruent: IO) were presented as contextual cues. Recognition performance was not influenced by odor, but there was increased activation in the piriform cortex during successful encoding in the CO group, possibly indicating enhanced retrieval of information previously integrated with an olfactory percept...
June 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28646852/the-facial-expression-of-schizophrenic-patients-applied-with-infrared-thermal-facial-image-sequence
#15
Bo-Lin Jian, Chieh-Li Chen, Wen-Lin Chu, Min-Wei Huang
BACKGROUND: Schizophrenia is a neurological disease characterized by alterations to patients' cognitive functions and emotional expressions. Relevant studies often use magnetic resonance imaging (MRI) of the brain to explore structural differences and responsiveness within brain regions. However, as this technique is expensive and commonly induces claustrophobia, it is frequently refused by patients. Thus, this study used non-contact infrared thermal facial images (ITFIs) to analyze facial temperature changes evoked by different emotions in moderately and markedly ill schizophrenia patients...
June 24, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28646791/disorganised-schizotypy-is-selectively-associated-with-poorer-semantic-processing-in-non-clinical-individuals
#16
Eric Josiah Tan, Susan Lee Rossell
The nature and severity of semantic memory (SM) impairments in schizophrenia has been related to symptoms, mainly formal thought disorder (FTD), and other clinical factors like length of illness. Symptom-related studies in schizophrenia are often confounded by clinical factors, for example medication and hospitalisations. We completed a schizotypy analogue study to examine the relationship between SM processing and FTD using an analogue schizotypy score referred to as cognitive disorganisation. Sixty individuals without a history of mental illness (M=22...
June 20, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28646595/point-of-care-ultrasound-work-flow-innovation-impact-on-documentation-and-billing
#17
Matthew J Flannigan, Srikar Adhikari
OBJECTIVES: To evaluate the impact that an innovative automated ultrasound (US) work flow, which allows for bedside performance of examination documentation and order placement, has on point-of-care US billing compared to ordering US examinations through an electronic medical record. METHODS: We conducted a retrospective review of point-of-care US billing data (March 2014-February 2016) for adult and pediatric emergency departments with an emergency medicine residency and a US fellowship...
June 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28646003/implicit-weight-bias-in-children-age-9-to-11-years
#18
Asheley Cockrell Skinner, Keith Payne, Andrew J Perrin, Abigail T Panter, Janna B Howard, Anna Bardone-Cone, Cynthia M Bulik, Michael J Steiner, Eliana M Perrin
OBJECTIVES: Assess implicit weight bias in children 9 to 11 years old. METHODS: Implicit weight bias was measured in children ages 9 to 11 (N = 114) by using the Affect Misattribution Procedure. Participants were shown a test image of a child for 350 milliseconds followed by a meaningless fractal (200 milliseconds), and then they were asked to rate the fractal image as "good" or "bad." We used 9 image pairs matched on age, race, sex, and activity but differing by weight of the child...
June 23, 2017: Pediatrics
https://www.readbyqxmd.com/read/28645229/cognitive-function-in-early-psychosis-patients-from-a-lower-middle-income-country
#19
Muhammed Omair Husain, Imran B Chaudhry, Rachel Thomasson, Tayyeba Kiran, Paul Bassett, Muhammad I Husain, Farooq Naeem, Nusrat Husain
OBJECTIVES: To establish evidence of cognitive changes in early psychosis (EP) patients compared to healthy controls (HC) in Pakistan. METHODS: Fifty-one participants with EP were recruited from psychiatric units in Karachi and Rawalpindi, Pakistan and matched with 51 HC. Neurocognitive domains were assessed using standardised neuropsychological tests [the Stroop test, block design, Matrix Reasoning, picture completion, object assembly, oral fluency, memory for design, Coughlan learning task (verbal and visual)]...
June 23, 2017: International Journal of Psychiatry in Clinical Practice
https://www.readbyqxmd.com/read/28645028/lipid-homeostasis-and-regulated-cell-death
#20
REVIEW
Eran Agmon, Brent R Stockwell
Modern lipidomics analysis paints a dynamic picture of membrane organizations, as changing and adapting lipid assemblies that play an active role in cellular function. This article highlights how the lipid composition of membranes determines specific organelle functions, how homeostatic mechanisms maintain these functions by regulating physical properties of membranes, and how cells disrupt lipid homeostasis to bring about regulated cell death (RCD). These are broad phenomena, and representative examples are reviewed here...
June 20, 2017: Current Opinion in Chemical Biology
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