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https://www.readbyqxmd.com/read/28820253/bioinorganic-chemistry-of-parkinson-s-disease-affinity-and-structural-features-of-cu-i-binding-to-the-full-length-%C3%AE-synuclein-protein
#1
Marco C Miotto, Mayra D Pavese, Liliana Quintanar, Markus Zweckstetter, Christian Griesinger, Claudio O Fernández
Alterations in the levels of copper in brain tissue and formation of α-synuclein (αS)-copper complexes might play a key role in the amyloid aggregation of αS and the onset of Parkinson's disease (PD). Recently, we demonstrated that formation of the high-affinity Cu(I) complex with the N-terminally acetylated form of the protein αS substantially increases and stabilizes local conformations with α-helical secondary structure and restricted motility. In this work, we performed a detailed NMR-based structural characterization of the Cu(I) complexes with the full-length acetylated form of its homologue β-synuclein (βS), which is colocalized with αS in vivo and can bind copper ions...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28814537/public-health-literature-review-of-fragile-x-syndrome
#2
Melissa Raspa, Anne C Wheeler, Catharine Riley
OBJECTIVES: The purpose of this systematic literature review is to describe what is known about fragile X syndrome (FXS) and to identify research gaps. The results can be used to help inform future public health research and provide pediatricians with up-to-date information about the implications of the condition for individuals and their families. METHODS: An electronic literature search was conducted, guided by a variety of key words. The search focused on 4 areas of both clinical and public health importance: (1) the full mutation phenotype, (2) developmental trajectories across the life span, (3) available interventions and treatments, and (4) impact on the family...
June 2017: Pediatrics
https://www.readbyqxmd.com/read/28814435/adaptive-global-innovative-learning-environment-for-glioblastoma-gbm-agile
#3
Brian M Alexander, Sujuan Ba, Mitchel S Berger, Donald A Berry, Webster K Cavenee, Susan M Chang, Timothy F Cloughesy, Tao Jiang, Mustafa Khasraw, Wenbin Li, Robert Mittman, George H Poste, Patrick Y Wen, W K Alfred Yung, Anna D Barker
Glioblastoma (GBM) is a deadly disease with few effective therapies. While much has been learned about the molecular characteristics of the disease, this knowledge has not been translated into clinical improvements for patients. At the same time, many new therapies are being developed. Many of these therapies have potential biomarkers to identify responders. The result is an enormous amount of testable clinical questions that must be answered efficiently. The GBM Adaptive Global Innovative Learning Environment (GBM AGILE) is a novel, multi-arm, platform trial designed to address these challenges...
August 16, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28808720/external-electric-field-control-driving-the-reactivity-of-metal-free-azide-alkyne-click-reactions
#4
Kalishankar Bhattacharyya, Sharmistha Karmakar, Ayan Datta
Recent reports have suggested that an external electric field (EEF) can assist and even control product selectivity. In this work, we have shown that the barrier for the Huisgen reaction between alkyl (aryl) azide and cyclooctyne(biflurocyclooctyne) is reduced by ∼3-4 kcal mol(-1) when an oriented EEF is applied along the reaction axis. As a consequence of their inherently polar transition-states (TSs), a parallel orientation of the EEF results in enhancement of the charge transfer (CT) between the fragments and concomitant increase in the dipole moment along the reaction axes...
August 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28802894/doomed-to-collapse-why-algerian-steppe-rangelands-are-overgrazed-and-some-lessons-to-help-land-use-transitions
#5
Jaime Martínez-Valderrama, Javier Ibáñez, Gabriel Del Barrio, Francisco J Alcalá, Maria E Sanjuán, Alberto Ruiz, Azziz Hirche, Juan Puigdefábregas
This work illustrates the application of a simulation model to analyse how swiftly large-scale land-use changes can drive broad territories to collapse. In this sense, the economic needs of a population should not clash with the natural environment but rather be reconciled with it. Abundant literature deals with the integration of socioeconomic drivers, ecological aspects, farming management, and climatology related to Algerian rangeland degradation. The present study seeks to compare the time course of Alfa grass biomass and the livestock raised on these distinctive rangelands under two different land-use strategies...
August 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28802575/military-experience-can-influence-women-s-eating-habits
#6
Jessica Y Breland, Rosemary Donalson, Andrea Nevedal, Julie V Dinh, Shira Maguen
BACKGROUND: Disordered eating, ranging from occasional binge eating or restriction to behaviors associated with eating disorder diagnoses, is common among military personnel and veterans. However, there is little information on how military service affects eating habits. OBJECTIVE: To describe possible pathways between military service and disordered eating among women veterans, a high risk group. MATERIALS AND METHODS: Twenty women veterans who reported changing eating habits in response to stress participated in audio-recorded focus groups or dyadic interviews between April 2013 and October 2014...
August 9, 2017: Appetite
https://www.readbyqxmd.com/read/28802165/the-world-according-to-garp-transcription-factors
#7
REVIEW
Alaeddine Safi, Anna Medici, Wojciech Szponarski, Sandrine Ruffel, Benoît Lacombe, Gabriel Krouk
Plant specific GARP transcription factor family (made of ARR-B and G2-like) contains genes with very diverse in planta functions: nutrient sensing, root and shoot development, floral transition, chloroplast development, circadian clock oscillation maintenance, hormonal transport and signaling. In this work we review: first, their structural but distant relationships with MYB transcription factors, second, their role in planta, third, the diversity of their Cis-regulatory elements, fourth, their potential protein partners...
August 10, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28799773/molecular-structuring-and-phase-transition-of-lipid-based-formulations-upon-water-dispersion-a-coarse-grained-molecular-dynamics-simulation-approach
#8
Per Larsson, Linda Alskär, Christel A S Bergström
The internal molecular structure of lipid-based formulations (LBFs) is poorly understood. In this work we aimed at establishing coarse-grained molecular dynamics simulations as a tool for rapid screening and investigation of the internal environment of these formulations. In order to study complex LBFs composed of different kinds of lipids we simulated a number of systems containing either medium-chain or long-chain lipids with varying proportions of tri-, di- and monoglycerides. Structural and dynamic measurements and analyses identified that the internal environment in a mixture of lipids was locally ordered even in the absence of water, which might explain some of the previously reported effects on drug solubility in these systems...
August 11, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28796201/enhanced-sensitivity-at-higher-order-exceptional-points
#9
Hossein Hodaei, Absar U Hassan, Steffen Wittek, Hipolito Garcia-Gracia, Ramy El-Ganainy, Demetrios N Christodoulides, Mercedeh Khajavikhan
Non-Hermitian degeneracies, also known as exceptional points, have recently emerged as a new way to engineer the response of open physical systems, that is, those that interact with the environment. They correspond to points in parameter space at which the eigenvalues of the underlying system and the corresponding eigenvectors simultaneously coalesce. In optics, the abrupt nature of the phase transitions that are encountered around exceptional points has been shown to lead to many intriguing phenomena, such as loss-induced transparency, unidirectional invisibility, band merging, topological chirality and laser mode selectivity...
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28796150/the-role-of-cancer-derived-exosomes-in-tumorigenicity-epithelial-to-mesenchymal-transition
#10
REVIEW
Robert H Blackwell, Kimberly E Foreman, Gopal N Gupta
Epithelial-to-mesenchymal transition (EMT) is a process by which epithelial cells lose their basement membrane interaction and acquire a more migratory, mesenchymal phenotype. EMT has been implicated in cancer cell progression, as cells transform and increase motility and invasiveness, induce angiogenesis, and metastasize. Exosomes are 30-100 nm membrane-bound vesicles that are formed and excreted by all cell types and released into the extracellular environment. Exosomal contents include DNA, mRNA, miRNA, as well as transmembrane- and membrane-bound proteins derived from their host cell contents...
August 10, 2017: Cancers
https://www.readbyqxmd.com/read/28759690/use-of-the-1-minute-preceptor-model-as-a-tool-in-working-with-nurses
#11
Karren Kowalski
New graduates, newly hired nurses, and nurses transitioning to new specialties need thoughtful and thorough oversight during this process both to ensure acquisition of the required skill set and to become an integral part of the new area. Well-prepared preceptors who facilitate this education can decrease turnover and help to build a healthy work environment. J Contin Educ Nurs. 2017;48(8):345-346.
August 1, 2017: Journal of Continuing Education in Nursing
https://www.readbyqxmd.com/read/28755371/native-mass-spectrometry-for-the-characterization-of-structure-and-interactions-of-membrane-proteins
#12
Jeroen F van Dyck, Albert Konijnenberg, Frank Sobott
Over the past years, native mass spectrometry and ion mobility have grown into techniques that are widely applicable to the study of aspects of protein structure. More recently, it has become apparent that this approach provides a very promising avenue for the investigation of integral membrane proteins in lipid or detergent environments.In this chapter, we discuss applications of native mass spectrometry and ion mobility in membrane protein research-what is important to take into consideration when working with membrane proteins, and what the requirements are for sample preparation for native mass spectrometry...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28742412/post-high-school-changes-in-tobacco-and-cannabis-use-in-the-united-states
#13
Fearghal O'brien, Bruce Simons-Morton, Ashok Chaurasia, Jeremy Luk, Denise Haynie, Danping Liu
BACKGROUND: The transition from high school into young adulthood is a critical developmental period with many young people going to college, moving residence, and entering the work force for the first time. The NEXT Generation Health Study (NEXT) is a nationally representative longitudinal study of adolescent health behaviors. Previous NEXT research has found that the post-high school environment is associated with changes in alcohol use. OBJECTIVES: The current study investigated the impact of school status, residential status, and work status on cannabis and cigarette use among post-high school participants...
July 25, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28742339/vms-rot-a-new-module-of-the-virtual-multifrequency-spectrometer-for-simulation-interpretation-and-fitting-of-rotational-spectra
#14
Daniele Licari, Nicola Tasinato, Lorenzo Spada, Cristina Puzzarini, Vincenzo Barone
The Virtual Multifrequency Spectrometer (VMS) is a tool that aims at integrating a wide range of computational and experimental spectroscopic techniques with the final goal of disclosing the static and dynamic physical-chemical properties "hidden" in molecular spectra. VMS is composed of two parts, namely, VMS-Comp, which provides access to the latest developments in the field of computational spectroscopy, and VMS-Draw, which provides a powerful graphical user interface (GUI) for an intuitive interpretation of theoretical outcomes and a direct comparison to experiment...
August 11, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28740187/dark-state-with-counter-rotating-dissipative-channels
#15
Zheng-Yang Zhou, Mi Chen, Lian-Ao Wu, Ting Yu, J Q You
Dark state as a consequence of interference between different quantum states has great importance in the fields of chip-scale atomic clock and quantum information. For the Λ-type three-level system, this dark state is generally regarded as being dissipation-free because it is a superposition of two lowest states without dipole transition between them. However, previous studies are based on the rotating-wave approximation (RWA) by neglecting the counter-rotating terms in the system-environment interaction. In this work, we study non-Markovian quantum dynamics of the dark state in a Λ-type three-level system coupled to two bosonic baths and reveal the effect of counter-rotating terms on the dark state...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28739482/brain-responses-to-40-hz-binaural-beat-and-effects-on-emotion-and-memory
#16
Nantawachara Jirakittayakorn, Yodchanan Wongsawat
Gamma oscillation plays a role in binding process or sensory integration, a process by which several brain areas beside primary cortex are activated for higher perception of the received stimulus. Beta oscillation is also involved in interpreting received stimulus and occurs following gamma oscillation, and this process is known as gamma-to-beta transition, a process for neglecting unnecessary stimuli in surrounding environment. Gamma oscillation also associates with cognitive functions, memory and emotion...
July 21, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28728804/pharmacy-technician-self-efficacies-insight-to-aid-future-education-staff-development-and-workforce-planning
#17
Shane P Desselle, Ryan Hoh, Erin R Holmes, Amanpreet Gill, Lemuel Zamora
BACKGROUND: The roles of pharmacy technicians are increasingly prominent given pharmacy's transition to patient-centered activities and evolving scopes of practice in many U.S. states and throughout the world. OBJECTIVES: The aims of this study were to assess U.S. pharmacy technicians' self-efficacies for and attitudes toward performing current and emerging roles in hospital and in community pharmacy and to identify factors related to pharmacy technician self-efficacies in these roles...
July 15, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28723924/a-context-for-the-last-neandertals-of-interior-iberia-los-casares-cave-revisited
#18
Manuel Alcaraz-Castaño, Javier Alcolea-González, Martin Kehl, Rosa-María Albert, Javier Baena-Preysler, Rodrigo de Balbín-Behrmann, Felipe Cuartero, Gloria Cuenca-Bescós, Fernando Jiménez-Barredo, José-Antonio López-Sáez, Raquel Piqué, David Rodríguez-Antón, José Yravedra, Gerd-Christian Weniger
INTRODUCTION AND OBJECTIVES: Although the Iberian Peninsula is a key area for understanding the Middle to Upper Paleolithic transition and the demise of the Neandertals, valuable evidence for these debates remains scarce and problematic in its interior regions. Sparse data supporting a late Neandertal persistence in the Iberian interior have been recently refuted and hence new evidence is needed to build new models on the timing and causes of Neandertal disappearance in inland Iberia and the whole peninsula...
2017: PloS One
https://www.readbyqxmd.com/read/28714119/high-performance-polymers-sandwiched-with-chemical-vapor-deposited-hexagonal-boron-nitrides-as-scalable-high-temperature-dielectric-materials
#19
Amin Azizi, Matthew R Gadinski, Qi Li, Mohammed Abu AlSaud, Jianjun Wang, Yi Wang, Bo Wang, Feihua Liu, Long-Qing Chen, Nasim Alem, Qing Wang
Polymer dielectrics are the preferred materials of choice for power electronics and pulsed power applications. However, their relatively low operating temperatures significantly limit their uses in harsh-environment energy storage devices, e.g., automobile and aerospace power systems. Herein, hexagonal boron nitride (h-BN) films are prepared from chemical vapor deposition (CVD) and readily transferred onto polyetherimide (PEI) films. Greatly improved performance in terms of discharged energy density and charge-discharge efficiency is achieved in the PEI sandwiched with CVD-grown h-BN films at elevated temperatures when compared to neat PEI films and other high-temperature polymer and nanocomposite dielectrics...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28691921/application-of-the-lany-zunger-polaron-correction-for-calculating-surface-charge-trapping
#20
Meisam Farzalipour Tabriz, Bálint Aradi, Thomas Frauenheim, Peter Deak
Defect calculations, using density functional theory in a local or semi-local approximation, in transition metal oxides are severely handicapped by the electron self-interaction error. The underestimation of the band gap may cause incorrect occupation of defect states and wrong formation energies, and the underestimated localization of the states disfavors the formation of small polarons. These problems can be avoided by using higher level approximations (GW or a correctly chosen hybrid functional), but those methods are computationally too expensive to be used for calculating surface defects in a periodic slab model...
July 10, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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