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https://www.readbyqxmd.com/read/28196566/using-high-fidelity-simulation-scenarios-in-the-classroom-to-engage-learners
#1
Stephanie Turner, Leslie G Cole
It is well known that active teaching strategies improve student learning outcomes. By using simulation scenarios as a tool to teach systematic decision making in the classroom, faculty allow a large group of students to develop abstract thinking and gain experience in a setting that has traditionally delivered information in a linear format. This article will describe the process of using a high-fidelity simulation scenario as an unfolding case study to teach students how to manage and care for a patient.
February 1, 2017: Creative Nursing
https://www.readbyqxmd.com/read/28196347/disentangling-life-darwin-selectionism-and-the-postgenomic-return-of-the-environment
#2
Maurizio Meloni
In this paper, I analyze the disruptive impact of Darwinian selectionism for the century-long tradition in which the environment had a direct causative role in shaping an organism's traits. In the case of humans, the surrounding environment often determined not only the physical, but also the mental and moral features of individuals and whole populations. With its apparatus of indirect effects, random variations, and a much less harmonious view of nature and adaptation, Darwinian selectionism severed the deep imbrication of organism and milieu posited by these traditional environmentalist models...
February 11, 2017: Studies in History and Philosophy of Biological and Biomedical Sciences
https://www.readbyqxmd.com/read/28195464/combining-the-martini-and-structure-based-coarse-grained-approaches-for-the-molecular-dynamics-studies-of-conformational-transitions-in-proteins
#3
Adolfo B Poma, Marek Cieplak, Panagiotis E Theodorakis
The application of coarse-grain (CG) models in biology is essential to access large length and time scales required for the description of many biological processes. The ELNEDIN protein model is based on the well-known MARTINI CG force-field and incorporates additionally harmonic bonds of a certain spring constant within a defined cutoff distance between pairs of residues, in order to preserve the native structure of the protein. In this case, the use of unbreakable harmonic bonds hinders the study of unfolded protein structures and unfolding processes...
February 14, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28179995/caspase-mediated-proteolysis-of-the-sorting-nexin-2-disrupts-retromer-assembly-and-potentiates-met-hepatocyte-growth-factor-receptor-signaling
#4
Catherine M Duclos, Audrey Champagne, Julie C Carrier, Caroline Saucier, Christine L Lavoie, Jean-Bernard Denault
The unfolding of apoptosis involves the cleavage of hundreds of proteins by the caspase family of cysteinyl peptidases. Among those substrates are proteins involved in intracellular vesicle trafficking with a net outcome of shutting down the crucial processes governing protein transport to organelles and to the plasma membrane. However, because of the intertwining of receptor trafficking and signaling, cleavage of specific proteins may lead to unintended consequences. Here we show that in apoptosis, sorting nexin 1 and 2 (SNX1 and SNX2), two proteins involved in endosomal sorting, are cleaved by initiator caspases and also by executioner caspase-6 in the case of SNX2...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28165720/intein-promoted-cyclization-of-aspartic-acid-flanking-the-intein-leads-to-atypical-n-terminal-cleavage
#5
Christopher J Minteer, Nicolle M Siegart, Kathryn M Colelli, Xinyue Liu, Robert J Linhardt, Chunyu Wang, Alvin V Gomez, Julie N Reitter, Kenneth V Mills
Protein splicing is a post-translational reaction facilitated by an intein, or intervening protein, which involves the removal of the intein and the ligation of the flanking polypeptides, or exteins. A DNA polymerase II intein from Pyrococcus abyssi (Pab PolII intein) can promote protein splicing in vitro on incubation at high temperature. Mutation of active site residues Cys1, Gln185, and Cys+1 to Ala results in an inactive intein precursor, which cannot promote the steps of splicing, including cleavage of the peptide bond linking the N-extein and intein (N-terminal cleavage)...
February 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/28104290/exploring-the-longitudinal-offending-pathways-of-child-sexual-abuse-victims-a-preliminary-analysis-using-latent-variable-modeling
#6
Nina L Papalia, Stefan Luebbers, James R P Ogloff, Margaret Cutajar, Paul E Mullen
Very little research has been conducted to show the way in which criminal behavior unfolds over the life-course in children who have been sexually abused, and whether it differs from the 'age-crime' patterns consistently documented in the criminology literature. This study investigated the temporal pathways of criminal offending between the ages of 10-25 years among medically confirmed cases of child sexual abuse (CSA), and considered whether abuse variables, offense variables, and the presence of other adverse outcomes, were associated with heterogeneity in offending pathways among CSA survivors...
January 16, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28101038/successful-management-in-a-case-of-traumatic-retinal-detachment-due-to-open-globe-injury-using-microincisional-vitrectomy
#7
Wei-Yu Lai, Tsung-Tien Wu
BACKGROUND: Retinal detachment (RD) following ocular trauma often results in guarded visual prognosis and sometimes leads to loss of the eye. With the advent of microincisional vitrectomy surgery and the development of surgical techniques, the management of ocular trauma has been transformed. CASE PRESENTATION: A 34-year-old man sustained an open globe injury from fragmented glass at work. He received primary repair and another follow-up surgery 9 days later, including vitrectomy, silicone oil tamponade, and lensectomy for RD and traumatic cataract at another medical center...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28100670/two-new-single-exposure-multi-detector-neutron-spectrometers-for-radiation-protection-applications-in-workplace-monitoring
#8
J M Gómez-Ros, R Bedogni, D Bortot, C Domingo, A Esposito, M V Introini, M Lorenzoli, G Mazzitelli, M Moraleda, A Pola, D Sacco
This communication describes two new instruments, based on multiple active thermal neutron detectors arranged within a single moderator, that permit to unfold the neutron spectrum (from thermal to hundreds of MeV) and to determine the corresponding integral quantities with only one exposure. This makes them especially advantageous for neutron field characterisation and workplace monitoring in neutron-producing facilities. One of the devices has spherical geometry and nearly isotropic response, the other one has cylindrical symmetry and it is only sensitive to neutrons incident along the cylinder axis...
January 17, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28097675/the-swamplands-of-reflection-using-conversation-analysis-to-reveal-the-architecture-of-group-reflection-sessions
#9
Mario Veen, Anne de la Croix
CONTEXT: Many medical schools include group reflection in their curriculum, and many researchers have considered both the concept and the outcomes of reflection. However, no research has been carried out on how 'reflective talk' is structured in the classroom. This paper describes how tutors and residents organise group reflection sessions in situ by describing an example of group reflection in medical education. Our aim is to provide an evidence base that can be used by medical educators to think about the way reflection should be included in their curriculum...
January 18, 2017: Medical Education
https://www.readbyqxmd.com/read/28059091/identification-of-distinct-subgroups-of-ebv-positive-post-transplant-diffuse-large-b-cell-lymphoma
#10
Julie Morscio, Julio Finalet Ferreiro, Sara Vander Borght, Emilie Bittoun, Olivier Gheysens, Daan Dierickx, Gregor Verhoef, Iwona Wlodarska, Thomas Tousseyn
Post-transplantation lymphoproliferative disorder is an aggressive complication of transplantation, most frequently of diffuse large B-cell lymphoma morphology and associated with Epstein-Barr virus (EBV) infection/reactivation. In this study the microenvironment of EBV(+) (n=23) and EBV(-) (n=9) post-transplant non-germinal center B-cell diffuse large B-cell lymphoma was characterized. Of EBV(+) cases somatic hypermutation analysis, gene expression profiling, and extensive phenotyping were performed. Our results demonstrated variable cytotoxic T-cell infiltration and significantly increased CD163(+) M2 macrophage infiltration in EBV(+) compared with EBV(-) post-transplant diffuse large B-cell lymphoma...
January 6, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28046938/su-f-i-21-unfolding-of-aliased-dynamic-acquisitions-for-the-acceleration-of-breast-dynamic-contrast-enhanced-mri-dce-mri
#11
F Pineda, M Medved, X Fan, G Karczmar
PURPOSE: To determine the feasibility of increasing temporal resolution in breast DCE-MRI by reducing the field-of-view (FOV) and unfolding the aliased images using un-aliased subtraction images as guides. METHODS: Experience with an 'ultrafast' protocol for breast DCE-MRI (6-10s acquisitions) showed that the number of significantly enhancing voxels was very low (<7% of the FOV) in the first 30-45s after contrast injection. The sparse enhancement in these images suggests that if the FOV is reduced in the phase-encoding direction (reducing acquisition time) and aliasing occurs, the likelihood of two significantly-enhancing voxels overlapping in the aliased image is relatively low...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043015/comparison-of-the-effectiveness-of-two-styles-of-case-based-learning-implemented-in-lectures-for-developing-nursing-students-critical-thinking-ability-a-randomized-controlled-trial
#12
Shaohua Hong, Ping Yu
PURPOSE: To explore and compare the effectiveness of two styles of case-based learning methods, unfolding nursing case and usual nursing case, implemented in lectures for developing nursing students' critical thinking ability. METHODS: 122 undergraduate nursing students in four classes were taught the subject of medical nursing for one year. Two classes were randomly assigned as the experimental group and the other two the control group. The experimental group received the lectures presenting unfolding nursing cases and the control group was taught the usual cases...
December 23, 2016: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28033550/alignment-in-social-interactions
#13
M Gallotti, M T Fairhurst, C D Frith
According to the prevailing paradigm in social-cognitive neuroscience, the mental states of individuals become shared when they adapt to each other in the pursuit of a shared goal. We challenge this view by proposing an alternative approach to the cognitive foundations of social interactions. The central claim of this paper is that social cognition concerns the graded and dynamic process of alignment of individual minds, even in the absence of a shared goal. When individuals reciprocally exchange information about each other's minds processes of alignment unfold over time and across space, creating a social interaction...
February 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28032989/how-does-your-protein-fold-elucidating-the-apomyoglobin-folding-pathway
#14
H Jane Dyson, Peter E Wright
Although each type of protein fold and in some cases individual proteins within a fold classification can have very different mechanisms of folding, the underlying biophysical and biochemical principles that operate to cause a linear polypeptide chain to fold into a globular structure must be the same. In an aqueous solution, the protein takes up the thermodynamically most stable structure, but the pathway along which the polypeptide proceeds in order to reach that structure is a function of the amino acid sequence, which must be the final determining factor, not only in shaping the final folded structure, but in dictating the folding pathway...
January 17, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28025808/backbone-resonance-assignments-of-monomeric-sod1-in-dilute-and-crowded-environments
#15
Naoto Iwakawa, Daichi Morimoto, Erik Walinda, Kenji Sugase, Masahiro Shirakawa
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease that leads to movement disorders. In motor neurons of ALS patients, intracellular aggregates of superoxide dismutase 1 (SOD1) have often been observed. To elucidate the aggregation mechanism, it is important to analyze the folding equilibrium of SOD1 between folded and aggregation-prone unfolded states. However, in most cases, this folding equilibrium has been studied in dilute solution even though the aggregate formation occurs in a highly crowded intracellular environment...
December 26, 2016: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/28017766/folding-and-unfolding-pathway-of-chaperonin-groel-monomer-and-elucidation-of-thermodynamic-parameters
#16
Sarita Puri, Tapan K Chaudhuri
The conformation and thermodynamic stability of monomeric GroEL were studied by CD and fluorescence spectroscopy. GroEL denaturation with urea and dilution in buffer leads to formation of a folded GroEL monomer. The monomeric nature of this protein was verified by size-exclusion chromatography and native PAGE. It has a well-defined secondary and tertiary structure, folding activity (prevention of aggregation) for substrate protein and is resistant to proteolysis. Being a properly folded and reversibly refoldable, monomeric GroEL is amenable for the study of thermodynamic stability by unfolding transition methods...
December 23, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27973780/defining-non-covalent-ubiquitin-homodimer-interfacial-interactions-through-comparisons-with-covalently-linked-diubiquitin
#17
Nicole Wagner, David H Russell
Ubiquitin (Ubq) is a small protein that exhibits diverse biological functionality as defined by its oligomeric state and conformational preference. Covalently linked diubiquitin (diUbq) is known to adopt specific interfacial interactions owing to steric hindrance induced by the covalent tether. K48-linked diUbq preferentially forms hydrophobic interfacial interactions between the two I44 faces under physiological conditions, whereas K63-linked diUbq preferentially forms electrostatic interfacial interactions...
December 14, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27968869/cataract-screening-in-a-rural-area-of-southern-china-a-retrospective-cohort-study
#18
Xuhua Tan, Haotian Lin, YuTing Li, Li Huang, Yi Zhu, Yao Ni, WenYong Huang, Yizhi Liu
BACKGROUND: Cataract is the leading cause of blindness and impaired vision worldwide; however, cataract surgery rate in China (1300 cases per million people per year) is lower than in Europe, America, and India (greater than 5000 cases per million people per year). In the past 10 years, a public health screening system has been established for early diagnosis and intervention of chronic diseases such as diabetes and hypertension by the Disease Control and Prevention Centers (CDC) of China...
October 2016: Lancet
https://www.readbyqxmd.com/read/27966879/single-molecule-fret-measurements-in-additive-enriched-aqueous-solutions
#19
Daryan Kempe, Michele Cerminara, Simón Poblete, Antonie Schöne, Matteo Gabba, Jörg Fitter
The addition of high amounts of chemical denaturants, salts, viscosity enhancers or macro-molecular crowding agents has an impact on the physical properties of buffer solutions. Among others, the (microscopic) viscosity, the refractive index, the dielectric constant, and the ionic strength can be affected. Here, we systematically evaluate the importance of solvent characteristics with respect to single-molecule FRET (smFRET) data. First, we present a confocal based method for the determination of fluorescence quantum yields to facilitate a fast characterization of smFRET-samples at sub-nM-concentrations...
December 14, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27964946/predicting-the-effect-of-amino-acid-single-point-mutations-on-protein-stability-large-scale-validation-of-md-based-relative-free-energy-calculations
#20
Thomas Steinbrecher, Chongkai Zhu, Lingle Wang, Robert Abel, Christopher Negron, David Pearlman, Eric Feyfant, Jianxin Duan, Woody Sherman
The stability of folded proteins is critical to their biological function and for the efficacy of protein therapeutics. Predicting the energetic effects of protein mutations can improve our fundamental understanding of structural biology, the molecular basis of diseases, and possible routes to addressing those diseases with biological drugs. Identifying the effect of single amino acid point mutations on the thermodynamic equilibrium between the folded and unfolded states of a protein can pinpoint residues of critical importance that should be avoided in the process of improving other properties (affinity, solubility, viscosity, etc...
December 10, 2016: Journal of Molecular Biology
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