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https://www.readbyqxmd.com/read/27921994/the-structure-of-sv40-large-t-hexameric-helicase-in-complex-with-at-rich-origin-dna
#1
Dahai Gai, Damian Wang, Shu-Xing Li, Xiaojiang S Chen
DNA replication is a fundamental biological process. The initial step in eukaryotic DNA replication is the assembly of the pre-initiation complex, including the formation of two head-to-head hexameric helicases around the replication origin. How these hexameric helicases interact with their origin dsDNA remains unknown. Here, we report the co-crystal structure of the SV40 Large-T Antigen (LT) hexameric helicase bound to its origin dsDNA. The structure shows that the six subunits form a near-planar ring that interacts with the origin, so that each subunit makes unique contacts with the DNA...
December 6, 2016: ELife
https://www.readbyqxmd.com/read/27918896/the-physical-mechanism-of-inhomogeneous-magnetization-transfer-mri
#2
Alan P Manning, Kimberley L Chang, Alex L MacKay, Carl A Michal
Inhomogeneous MT (ihMT) is a new magnetic resonance imaging technique that shows promise for myelin selectivity. Materials with a high proportion of lipids, such as white matter tissue, show a reduced intensity in magnetic resonance images acquired with selective prepulses at positive and negative offsets simultaneously compared to images with a single positive or negative offset prepulse of the same power. This effect was initially explained on the basis of hole-burning in inhomogeneously broadened lines of the lipid proton spin system...
November 24, 2016: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/27918836/evolvix-best-names-for-semantic-reproducibility-across-code2brain-interfaces
#3
Laurence Loewe, Katherine S Scheuer, Seth A Keel, Vaibhav Vyas, Ben Liblit, Bret Hanlon, Michael C Ferris, John Yin, Inês Dutra, Anthony Pietsch, Christine G Javid, Cecilia L Moog, Jocelyn Meyer, Jerdon Dresel, Brian McLoone, Sonya Loberger, Arezoo Movaghar, Morgaine Gilchrist-Scott, Yazeed Sabri, Dave Sescleifer, Ivan Pereda-Zorrilla, Andrew Zietlow, Rodrigo Smith, Samantha Pietenpol, Jacob Goldfinger, Sarah L Atzen, Erika Freiberg, Noah P Waters, Claire Nusbaum, Erik Nolan, Alyssa Hotz, Richard M Kliman, Ayalew Mentewab, Nathan Fregien, Martha Loewe
Names in programming are vital for understanding the meaning of code and big data. We define code2brain (C2B) interfaces as maps in compilers and brains between meaning and naming syntax, which help to understand executable code. While working toward an Evolvix syntax for general-purpose programming that makes accurate modeling easy for biologists, we observed how names affect C2B quality. To protect learning and coding investments, C2B interfaces require long-term backward compatibility and semantic reproducibility (accurate reproduction of computational meaning from coder-brains to reader-brains by code alone)...
December 5, 2016: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/27918116/multiferroic-nanopatterned-hybrid-material-with-room-temperature-magnetic-switching-of-the-electric-polarization
#4
Ronggang Cai, Vlad-Andrei Antohe, Zhijun Hu, Bernard Nysten, Luc Piraux, Alain M Jonas
A nanopatterned hybrid layer is designed, wherein the electric polarization can be flipped at room temperature by a magnetic field aided by an electrical field. This is achieved by embedding ferromagnetic nanopillars in a continuous organic ferroelectric layer, and amplifying the magnetostriction-generated stress gradients by scaling down the supracrystalline cell of the material.
December 5, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27917529/accuracy-precision-and-reproducibility-of-myocardial-t1-mapping-a-comparison-of-four-t1-estimation-algorithms-for-modified-look-locker-inversion-recovery-molli
#5
Jiaxin Shao, Dapeng Liu, Kyunghyun Sung, Kim-Lien Nguyen, Peng Hu
PURPOSE: To compare the accuracy and precision of four different T1 estimation algorithms for modified Look-Locker inversion recovery (MOLLI). METHODS: Four T1 estimation algorithms, including the original fit, inversion group (IG) fit, instantaneous signal loss simulation (InSiL), and Bloch equation simulation with slice profile correction (BLESSPC) were studied. T1 estimation accuracy, precision, reproducibility, and sensitivity to heart rate (HR), flip angle (FA), and acquisition scheme (AcS) variations were compared in simulation, phantom, and volunteer studies...
December 4, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27914357/moving-toward-heutagogical-learning-illuminating-undergraduate-nursing-students-experiences-in-a-flipped-classroom
#6
Rebecca D Green, Maura C Schlairet
BACKGROUND: Nurse educators rely on the tenets of educational theory and evidence-based education to promote the most effective curriculum and facilitate the best outcomes. The flipped classroom model, in which students assume personal responsibility for knowledge acquisition in a highly engaging and interactive environment, supports self-directed learning and the unique needs of clinical education. OBJECTIVE: To understand how students perceived their experiences in the flipped classroom and how students' learning dispositions were affected by the flipped classroom experience...
November 25, 2016: Nurse Education Today
https://www.readbyqxmd.com/read/27911937/an-investigation-of-the-outcomes-of-pgy-students-cognition-of-and-persistent-behavior-in-learning-through-the-intervention-of-the-flipped-classroom-in-taiwan
#7
Sheng-Der Hsu, Cheng-Jueng Chen, Wei-Kuo Chang, Yih-Jin Hu
The Postgraduate Year (PGY) Program allows doctors-in-training to learn about the diagnosis, treatment and nursing of various common, general diseases. These items form the core curriculum and are mostly learned through caring for patients and clinical teaching. Doctors-in-training are evaluated for their knowledge through written tests or assignments, based on which the effectiveness of their training is also assessed; however, this generally produces a negative learning attitude among them. So we introduced the flipped classroom into PGY training program to change PGY students' learning behavior...
2016: PloS One
https://www.readbyqxmd.com/read/27910618/faraday-cup-type-lost-fast-ion-detector-on-heliotron-j
#8
S Yamamoto, K Ogawa, M Isobe, D S Darrow, S Kobayashi, K Nagasaki, H Okada, T Minami, S Kado, S Ohshima, G M Weir, Y Nakamura, S Konoshima, N Kemmochi, Y Ohtani, T Mizuuchi
A Faraday-cup type lost-fast ion probe (FLIP) has been designed and installed in Heliotron J for the purpose of the studies of interaction between fast ions and MHD instabilities. The FLIP can measure the co-going fast ions whose energy is in the range of 1.7-42.5 keV (proton) and pitch angle of 90(∘)-140(∘), especially for fast ions having the injection energy of neutral beam injection (NBI). The FLIP successfully measured the re-entering passing ions and trapped lost-fast ions caused by fast-ion-driven energetic particle modes in NBI heated plasmas...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909018/does-the-room-matter-active-learning-in-traditional-and-enhanced-lecture-spaces
#9
Jon R Stoltzfus, Julie Libarkin
SCALE-UP-type classrooms, originating with the Student-Centered Active Learning Environment with Upside-down Pedagogies project, are designed to facilitate active learning by maximizing opportunities for interactions between students and embedding technology in the classroom. Positive impacts when active learning replaces lecture are well documented, both in traditional lecture halls and SCALE-UP-type classrooms. However, few studies have carefully analyzed student outcomes when comparable active learning-based instruction takes place in a traditional lecture hall and a SCALE-UP-type classroom...
2016: CBE Life Sciences Education
https://www.readbyqxmd.com/read/27908122/static-polarizabilities-for-excited-states-within-the-spin-conserving-and-spin-flipping-equation-of-motion-coupled-cluster-singles-and-doubles-formalism-theory-implementation-and-benchmarks
#10
Kaushik D Nanda, Anna I Krylov
We present the theory and implementation for calculating static polarizabilities within the equation-of-motion coupled-cluster singles and doubles (EOM-CCSD) framework for electronically excited states and its spin-flip variant. We evaluate the second derivatives of the EOM-CCSD Lagrangian with respect to electric-field perturbations. The relaxation of reference molecular orbitals is not included. In our approach, the wave function amplitudes satisfy the 2n + 1 rule and the amplitude-response Lagrange multipliers satisfy the 2n + 2 rule...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27907980/flipped-clinical-training-a-structured-training-method-for-undergraduates-in-complete-denture-prosthesis
#11
Anbarasi K, Kasim Mohamed K, Phagalvarthy Vijayaraghavan, Deivanayagam Kandaswamy
PURPOSE: To design and implement flipped clinical training for undergraduate dental students in removable complete denture treatment and predict its effectiveness by comparing the assessment results of students trained by flipped and traditional methods. METHODS: Flipped training was designed by shifting the learning from clinics to learning center (phase I) and by preserving the practice in clinics (phase II). In phase I, student-faculty interactive session was arranged to recap prior knowledge...
December 2016: Korean Journal of Medical Education
https://www.readbyqxmd.com/read/27906318/papr-analysis-for-ofdm-visible-light-communication
#12
Jiaheng Wang, Yang Xu, Xintong Ling, Rong Zhang, Zhi Ding, Chunming Zhao
Orthogonal frequency-division multiplexing (OFDM) is a practical technology in visible light communication (VLC) for high-speed transmissions. However, one of its operational limitations is the peak-to-average power ratio (PAPR) of the transmitted signal. In this paper, we analyze the PAPR distributions of four VLC OFDM schemes, namely DC-biased optical OFDM (DCO-OFDM), asymmetrically clipped optical OFDM (ACO-OFDM), pulse amplitude modulated discrete multitone (PAM-DMT), and Flip-OFDM. Both lower and upper clippings are considered...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27905602/achieving-enhanced-ionic-mobility-in-nanoporous-silica-by-controlled-surface-interactions
#13
Mounesha Nagendrachar Garaga, Luis Aguilera, Negin Yaghini, Aleksandar Matic, Michael Persson, Anna Martinelli
We report a strategy to enhance the ionic mobility in an emerging class of gels, based on robust nanoporous silica micro-particles, by chemical functionalization of the silica surface. Two very different ionic liquids are used to fill the nano-pores of silica at varying pore filling factors, namely one aprotic imidazolium based (1-methyl-3-hexylimidazolium bis(trifluoromethanesulfonyl)imide, C6C1ImTFSI), and one protic ammonium based (diethylmethylammonium methanesulfonate, DEMAOMs) ionic liquid. Both these ionic liquids display higher ionic mobility when confined in functionalized silica as compared to untreated silica nano-pores, an improvement that is more pronounced at low pore filling factors (i...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27904634/an-attempt-for-empowering-education-a-qualitative-study-of-in-service-training-of-nursing-personnel
#14
Mahmood Chaghari, Abbas Ebadi, Ahmad Ameryoun, Mohsen Safari
BACKGROUND: In-service training of nursing personnel has a significant role in increasing the empowerment of nurses and promotion of the quality of health services. The objective of this study is to identify and explain the process of in-service training of nursing personnel in the hospitals affiliated with Baqiyatallah University of Medical Sciences in Tehran. MATERIALS AND METHODS: The present study employed a qualitative approach using Corbin and Strauss method (2008) in 2015, and examined the viewpoints and experiences of 35 nurses, nurse managers, and educational managers with the in-service education of nursing staffs...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27903966/pde5-inhibitors-enhance-the-lethality-of-pemetrexed-through-inhibition-of-multiple-chaperone-proteins-and-via-the-actions-of-cyclic-gmp-and-nitric-oxide
#15
Laurence Booth, Jane L Roberts, Andrew Poklepovic, Sarah Gordon, Paul Dent
Phosphodiesterase 5 (PDE5) inhibitors prevent the breakdown of cGMP that results in prolonged protein kinase G activation and the generation of nitric oxide. PDE5 inhibitors enhanced the anti-NSCLC cell effects of the NSCLC therapeutic pemetrexed. [Pemetrexed + sildenafil] activated an eIF2α - ATF4 - CHOP - Beclin1 pathway causing formation of toxic autophagosomes; activated a protective IRE1 - XBP-1 - chaperone induction pathway; and activated a toxic eIF2α - CHOP - DR4 / DR5 / CD95 induction pathway. [Pemetrexed + sildenafil] reduced the expression of c-FLIP-s, MCL-1 and BCL-XL that was blocked in a cell-type -dependent fashion by either over-expression of HSP90 / GRP78 / HSP70 / HSP27 or by blockade of eIF2α-CHOP signaling...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27897437/one-coin-no-need-to-flip-shared-pet-targets-in-cancer-and-coronary-artery-disease
#16
A N Paschali, S G Nekolla, K Evangelou, G J Cook, Constantinos D Anagnostopoulos
OBJECTIVE: The purposes of this article are to review the common biologic features of cancer and coronary artery disease assessed with PET tracers, focusing on those already used in the clinic and those with translational potential, and to discuss the current value and expected contribution of PET in diagnosis, risk stratification, and treatment monitoring. CONCLUSION: PET using a wide variety of radiotracers enhances understanding of pathophysiologic changes shared by cancer and coronary artery disease, helps establish an accurate diagnosis, and aids in prognostic assessment and management decisions...
November 29, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27896914/an-innovative-textbook-design-and-implementation
#17
Rafael Ortega, Vafa Akhtar-Khavari, Paul Barash, Sam Sharar, M Christine Stock
BACKGROUND: The 'flipped classroom' instructional strategy has gained much momentum in educational discourse, yet no single educational offering exists in postgraduate medical education (PME) to systematically replace the lecture element of didactic sessions. This article describes the design and implementation of Clinical Anesthesia Fundamentals, the first known textbook in PME addressing this gap in resources through the integration of full-length interactive multimedia-enhanced video lectures...
November 29, 2016: Clinical Teacher
https://www.readbyqxmd.com/read/27893386/optimizing-mr-scan-design-for-model-based-t1-t2-estimation-from-steady-state-sequences
#18
Gopal Nataraj, Jon-Fredrick Nielsen, Jeffrey Fessler
Rapid, reliable quantification of MR relaxation parameters T1 and T2 is desirable for many clinical applications. Steady-state sequences such as Spoiled Gradient-Recalled Echo (SPGR) and Dual-Echo Steady-State (DESS) are fast and wellsuited for relaxometry because the signals they produce are quite sensitive to T1 and T2 variation. However, T1, T2 estimation with these sequences typically requires multiple scans with varied sets of acquisition parameters. This paper describes a systematic framework for selecting scan types (e...
October 4, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27892576/the-magnetization-orientation-of-fe-ultrathin-layers-in-contact-with-graphene
#19
Mattia Cattelan, Igor Píš, Silvia Nappini, Elena Magnano, Federica Bondino, Stefano Agnoli
In this paper, we study the magnetic and chemical properties of Fe/graphene vertically stacked ultrathin films by means of X-ray magnetic circular dichroism and X-ray photoelectron spectroscopy. We compare two systems: an iron layer deposited directly on top of the Pt(111) surface, and an intercalated Fe film sandwiched between graphene and Pt(111). The system composed of a submonolayer Fe deposited directly on Pt(111) maintains an out-of-plane easy magnetization axis, even if it has been covered by graphene that quenches effectively the magnetic orbital moment of Fe...
November 28, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27886953/flipping-the-filter-forceps-retrieval-of-a-left-common-iliac-vein-denali-filter-through-the-left-common-femoral-vein
#20
Aaron Bos, Marc Alonzo, Hector Ferral
No abstract text is available yet for this article.
December 2016: Journal of Vascular and Interventional Radiology: JVIR
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