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https://www.readbyqxmd.com/read/29469093/multi-terminal-memtransistors-from-polycrystalline-monolayer-molybdenum-disulfide
#1
Vinod K Sangwan, Hong-Sub Lee, Hadallia Bergeron, Itamar Balla, Megan E Beck, Kan-Sheng Chen, Mark C Hersam
Memristors are two-terminal passive circuit elements that have been developed for use in non-volatile resistive random-access memory and may also be useful in neuromorphic computing. Memristors have higher endurance and faster read/write times than flash memory and can provide multi-bit data storage. However, although two-terminal memristors have demonstrated capacity for basic neural functions, synapses in the human brain outnumber neurons by more than a thousandfold, which implies that multi-terminal memristors are needed to perform complex functions such as heterosynaptic plasticity...
February 21, 2018: Nature
https://www.readbyqxmd.com/read/29466382/mating-and-aggregative-behaviors-among-basal-hexapods-in-the-early-cretaceous
#2
Alba Sánchez-García, Enrique Peñalver, Xavier Delclòs, Michael S Engel
Among the many challenges in paleobiology is the inference and reconstruction of behaviors that rarely, if ever, leave a physical trace on the environment that is suitable for fossilization. Of particular significance are those behaviors tied to mating and courtship, individual interactions critical for species integrity and continuance, as well as those for dispersal, permitting the taxon to expand its distribution as well as access new habitats in the face of local or long-term environmental change. In this context, two recently discovered fossils from the Early Cretaceous amber of Spain (ca...
2018: PloS One
https://www.readbyqxmd.com/read/29460082/testing-hypotheses-on-risk-factors-for-scientific-misconduct-via-matched-control-analysis-of-papers-containing-problematic-image-duplications
#3
Daniele Fanelli, Rodrigo Costas, Ferric C Fang, Arturo Casadevall, Elisabeth M Bik
It is commonly hypothesized that scientists are more likely to engage in data falsification and fabrication when they are subject to pressures to publish, when they are not restrained by forms of social control, when they work in countries lacking policies to tackle scientific misconduct, and when they are male. Evidence to test these hypotheses, however, is inconclusive due to the difficulties of obtaining unbiased data. Here we report a pre-registered test of these four hypotheses, conducted on papers that were identified in a previous study as containing problematic image duplications through a systematic screening of the journal PLoS ONE...
February 19, 2018: Science and Engineering Ethics
https://www.readbyqxmd.com/read/29459285/evaluation-of-a-rapid-dna-process-with-the-rapidhit-%C3%A2-id-system-using-a-specialized-cartridge-for-extracted-and-quantified-human-dna
#4
Jacklyn Buscaino, Arnaldo Barican, Leto Farrales, Bruce Goldman, Jim Klevenberg, Melissa Kuhn, Frank Lin, Phong Nguyen, Susana Salceda, Robert Schueren, Corey Smith, Charles Troup, Dean Tsou, Mattias Vangbo, David King
The turn-around time of urgent crime scene DNA samples is often far longer than desired by law enforcement. Crime scene DNA sample processing involves both complex and routine processing steps. Simplification and integration of the routine steps would dramatically improve turn-around time and reduce the risk of operator contamination. Routine DNA extraction and quantitation is readily available. However, PCR amplification and electrophoretic analysis remain largely manual. Rapid DNA Analysis is a hands-free "swab in - profile out" process which consists of automated DNA extraction, amplification, separation, detection, and allele calling without human intervention...
February 13, 2018: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29458578/field-effect-transistor-integration-with-tio2-nanoparticles-for-sensing-of-cardiac-troponin-i-biomarker
#5
M K Md Arshad, R Adzhri, M F M Fathil, Subash C B Gopinath, Nuzaihan M N M
The development of electrical biosensor towards device miniaturization in order to achieve better sensitivity with enhanced electrical signal has certain limitations especially complexity in fabrication process and costs. In this paper, an alternative technique with minor modification in the device structure is presented for signal amplification by implementing ambipolar conduction in the biosensor itself. We demonstrated the field-effect transistor (FET)-based biosensor coupled back-gate for attaining a higher sensitivity with the detection of lower target abundance...
August 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29454158/polyisocyanopeptide-hydrogels-a-novel-thermo-responsive-hydrogel-supporting-pre-vascularization-and-the-development-of-organotypic-structures
#6
Jakub Zimoch, Joan Simó Padial, Agnes S Klar, Queralt Vallmajo-Martin, Martin Meuli, Thomas Biedermann, Christopher J Wilson, Alan Rowan, Ernst Reichmann
Molecular and mechanical interactions with the 3D extracellular matrix are essential for cell functions such as survival, proliferation, migration, and differentiation. Thermo-responsive biomimetic polyisocyanopeptide (PIC) hydrogels are promising new candidates for 3D cell, tissue, and organ cultures. This is a synthetic, thermo-responsive and stress-stiffening material synthesized via polymerization of the corresponding monomers using a nickel perchlorate as a catalyst. It can be tailored to meet various demands of cells by modulating its stiffness and through the decoration of the polymer with short GRGDS peptides using copper free click chemistry...
February 14, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29452594/comparative-immunogenicity-of-preparations-of-yeast-derived-dengue-oral-vaccine-candidate
#7
Jyotiranjan Bal, Nguyen Ngoc Luong, Jisang Park, Ki-Duk Song, Yong-Suk Jang, Dae-Hyuk Kim
BACKGROUND: Dengue is listed as a neglected tropical disease by the Center for Disease Control and Preservation, as there are insufficient integrated surveillance strategies, no effective treatment, and limited licensed vaccines. Consisting of four genetically distinct serotypes, dengue virus (DENV) causes serious life-threatening infections due to its complexity. Antibody-dependent enhancement by pre-existing cross-reactive as well as homotypic antibodies further worsens the clinical symptoms of dengue...
February 16, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29443439/complexity-of-the-relationships-of-pain-posttraumatic-stress-and-depression-in-combat-injured-populations-an-integrative-review-to-inform-evidence-based-practice
#8
Nicholas A Giordano, Christine Bader, Therese S Richmond, Rosemary C Polomano
BACKGROUND: Understanding the complex interrelationships between combat injuries, physical health, and mental health symptoms is critical to addressing the healthcare needs of wounded military personnel and veterans. The relationship between injury characteristics, pain, posttraumatic stress disorder (PTSD), and depression among combat-injured military personnel is unique to modern conflicts and understudied in the nursing literature. AIM: This integrative review synthesizes clinical presentations and relationships of combat injury, PTSD, depression, and pain in Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) United States military service members and veterans...
February 14, 2018: Worldviews on Evidence-based Nursing
https://www.readbyqxmd.com/read/29434527/visualisation-of-multiple-tight-junctional-complexes-in-human-airway-epithelial-cells
#9
Alysia G Buckley, Kevin Looi, Thomas Iosifidis, Kak-Ming Ling, Erika N Sutanto, Kelly M Martinovich, Elizabeth Kicic-Starcevich, Luke W Garratt, Nicole C Shaw, Francis J Lannigan, Alexander N Larcombe, Graeme Zosky, Darryl A Knight, Paul J Rigby, Anthony Kicic, Stephen M Stick
Background: Apically located tight junctions in airway epithelium perform a fundamental role in controlling macromolecule migration through paracellular spaces. Alterations in their expression may lead to disruptions in barrier integrity, which subsequently facilitates entry of potential bacterial and other pathogens into the host. Furthermore, there is emerging evidence that the barrier integrity of the airway in certain airway inflammatory diseases may be altered. However, there is little consensus on the way this is assessed and measured and the type of cells used to achieve this...
2018: Biological Procedures Online
https://www.readbyqxmd.com/read/29431534/organisation-of-dietary-control-for-nutrition-training-intervention-involving-periodized-carbohydrate-cho-availability-and-ketogenic-low-cho-high-fat-lchf-diet
#10
Joanne G Mirtschin, Sara F Forbes, Louise E Cato, Ida A Heikura, Nicki Strobel, Rebecca Hall, Louise M Burke
We describe the implementation of a 3-week dietary intervention in elite race walkers at the Australian Institute of Sport, with a focus on the resources and strategies needed to accomplish a complex study of this scale. Interventions involved: traditional guidelines of high carbohydrate (CHO) availability for all training sessions (HCHO); a periodized CHO diet which integrated sessions with low CHO and high CHO availability within the same total CHO intake, and a ketogenic low-CHO high-fat diet (LCHF). 7-day menus and recipes were constructed for a communal eating setting to meet nutritional goals as well as individualized food preferences and special needs...
February 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29421949/sperm-toxicity-testing-uk-best-practice-guideline-from-the-association-of-biomedical-andrologists
#11
S Long, B Woodward, M Tomlinson
In order to ensure the quality and integrity of diagnostic semen analysis results, materials used should be tested to ensure that they do not interfere with sperm function. As a toxicity test, complex sperm function testing may be considered controversial, since the fertilizing capacity of single sperm can never be assured. In preference, sperm motility offers a unique means of assessing the toxicity of reagents and materials before they are used in routine practice. Motility is the semen parameter most likely to be influenced by the external environment...
February 9, 2018: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/29398281/neurocognitive-outcomes-after-heart-transplantation-in-early-childhood
#12
Simon Urschel, Gwen Y Bond, Irina A Dinu, Fahime Moradi, Jennifer Conway, Gonzalo Garcia-Guerra, Bryan V Acton, Ari R Joffe, Mohammed AlAklabi, Ivan M Rebeyka, Charlene M T Robertson
BACKGROUND: Children requiring heart transplantation (HTx) for congenital heart disease (CHD) or failing anatomically normal hearts (CMP) face different challenges pre-HTx. We compared the neurocognitive capabilities in pre-school-age children receiving HTx for CHD vs CMP and determined factors predicting outcomes. METHODS: Data were collected within a prospective multi-provincial project from children who underwent HTx ≤4 years of age between 1999 and 2011. At age 54 ± 3 months, we obtained scores from the Wechsler Preschool and Primary Scales of Intelligence for full-scale intelligence quotient (FSIQ) verbal intelligence quotient (VIQ) and performance intelligence quotient (PIQ), and from the Beery-Buktenica Developmental Test for visual-motor integration (VMI)...
December 20, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29395409/physical-functional-and-psychosocial-recovery-from-burn-injury-are-related-and-their-relationship-changes-over-time-a-burn-model-system-study
#13
Andrew A McAleavey, Katarzyna Wyka, Melissa Peskin, JoAnn Difede
OBJECTIVE: While burn injuries can have dramatic effect on patients' physical health, they can also lead to intense psychological distress, loss of important social and role functioning, and alterations in outward appearance. We aimed to identify potential leading indicators of recovery in the post-discharge period following acute burn injury and hospitalization. METHOD: Using data derived from the Burn Model System National Database, we identified five outcomes of interest measured at four time points (Pre-burn/Discharge, 6 months, 12 months, and 24 months post-discharge), including mental health, physical functioning, community integration, life satisfaction, and satisfaction with appearance...
January 29, 2018: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/29395047/structural-conservation-and-effects-of-alterations-in-t-cell-receptor-transmembrane-interfaces
#14
Soohyung Park, Logesvaran Krshnan, Melissa J Call, Matthew E Call, Wonpil Im
T cell receptors (TCRs) are octameric assemblies of type-I membrane proteins in which a receptor heterodimer (αβ, δγ, or pre-Tαβ) is associated with three dimeric signaling modules (CD3δε, CD3γε, and ζζ) at the T cell or pre-T cell surface. In the human αβTCR, the α and β transmembrane (TM) domains form a specific structure that acts as a hub for assembly with the signaling modules inside the lipid bilayer. Conservation of key polar contacts across the C-terminal half of this TM interface suggests that the structure is a common feature of all TCR types...
January 29, 2018: Biophysical Journal
https://www.readbyqxmd.com/read/29393921/specim-iq-evaluation-of-a-new-miniaturized-handheld-hyperspectral-camera-and-its-application-for-plant-phenotyping-and-disease-detection
#15
Jan Behmann, Kelvin Acebron, Dzhaner Emin, Simon Bennertz, Shizue Matsubara, Stefan Thomas, David Bohnenkamp, Matheus T Kuska, Jouni Jussila, Harri Salo, Anne-Katrin Mahlein, Uwe Rascher
Hyperspectral imaging sensors are promising tools for monitoring crop plants or vegetation in different environments. Information on physiology, architecture or biochemistry of plants can be assessed non-invasively and on different scales. For instance, hyperspectral sensors are implemented for stress detection in plant phenotyping processes or in precision agriculture. Up to date, a variety of non-imaging and imaging hyperspectral sensors is available. The measuring process and the handling of most of these sensors is rather complex...
February 2, 2018: Sensors
https://www.readbyqxmd.com/read/29385695/members-of-glycosyl-hydrolase-family-17-of-a-fumigatus-differentially-affect-morphogenesis
#16
Nicolas Millet, Jean-Paul Latgé, Isabelle Mouyna
Cell wall biosynthesis and remodeling are essential for fungal growth and development. In the fungal pathogen Aspergillus fumigatus, the β(1,3)glucan is the major cell wall polysaccharide. This polymer is synthesized at the plasma membrane by a transmembrane complex, then released into the parietal space to be remodeled by enzymes, and finally incorporated into the pre-existing cell wall. In the Glycosyl-Hydrolases family 17 (GH17) of A. fumigatus, two β(1,3)glucanosyltransferases, Bgt1p and Bgt2p, have been previously characterized...
January 30, 2018: Journal of Fungi (Basel, Switzerland)
https://www.readbyqxmd.com/read/29384664/catalytic-silylation-of-n2-and-synthesis-of-nh3-and-n2h4-by-net-hydrogen-atom-transfer-reactions-using-a-chromium-p4-macrocycle
#17
Alexander J Kendall, Samantha I Johnson, R Morris Bullock, Michael T Mock
We report the first discrete molecular Cr-based catalysts for the reduction of N2. This study is focused on the reactivity of the Cr-N2 complex, trans-[Cr(N2)2(PPh4NBn4)], P4Cr(N2)2, bearing a 16-membered tetraphosphine macrocycle. The architecture of the [16]-PPh4NBn4 ligand is critical to pre-serve the structural integrity of the catalyst. P4Cr(N2)2 was found to mediate the reduction of N2 at room temperature and 1 atm pressure by three complementary reaction pathways: (1) Cr-catalyzed reduction of N2 to N(SiMe3)3 by Na and Me3SiCl, affording up to 34 equiv N(SiMe3)3; (2) stoichiometric reduction of N2 by protons and electrons...
January 31, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29373831/context-dependent-and-disease-specific-diversity-in-protein-interactions-within-stress-granules
#18
Sebastian Markmiller, Sahar Soltanieh, Kari L Server, Raymond Mak, Wenhao Jin, Mark Y Fang, En-Ching Luo, Florian Krach, Dejun Yang, Anindya Sen, Amit Fulzele, Jacob M Wozniak, David J Gonzalez, Mark W Kankel, Fen-Biao Gao, Eric J Bennett, Eric Lécuyer, Gene W Yeo
Stress granules (SGs) are transient ribonucleoprotein (RNP) aggregates that form during cellular stress and are increasingly implicated in human neurodegeneration. To study the proteome and compositional diversity of SGs in different cell types and in the context of neurodegeneration-linked mutations, we used ascorbate peroxidase (APEX) proximity labeling, mass spectrometry, and immunofluorescence to identify ∼150 previously unknown human SG components. A highly integrated, pre-existing SG protein interaction network in unstressed cells facilitates rapid coalescence into larger SGs...
January 25, 2018: Cell
https://www.readbyqxmd.com/read/29373750/internal-carotid-artery-bifurcation-aneurysms-microsurgical-strategies-and-operative-nuances-for-different-aneurysmal-directions
#19
Amey R Savardekar, Devi Prasad Patra, Vinayak Narayan, Papireddy Bollam, Bharat Guthikonda, Anil Nanda
BACKGROUND: Internal carotid artery bifurcation aneurysms (ICAbifAs), comprising approximately 5% of intracranial aneurysms, are characterized clinically by their tendency to occur at a younger age and surgically by the technical difficulties posed by their domes being adherent to the frontal lobe, their location at the apex of the sylvian fissure, and their relation to myriad perforator complexes. OBJECTIVE: To review the nuances of technique and operative strategy specific to aneurysmal direction in the light of our experience with ICAbifAs...
January 24, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29368874/preoperative-care-of-polypoid-exposed-mucosal-template-in-bladder-exstrophy-the-role-of-high-barrier-plastic-wraps-in-reducing-inflammation-and-polyp-size
#20
Nastaran Sabetkish, Shabnam Sabetkish, Abdol-Mohammad Kajbafzadeh
OBJECTIVE: To assess the role of high-barrier plastic wrap in reducing the number and size of polyps, as well as decreasing the inflammation and allergic reactions in exstrophy cases, and to compare the results with the application of low-barrier wrap. MATERIALS AND METHODS: Eight patients with bladder exstrophy-epispadias complex (BEEC) that had used a low density polyethylene (LDPE) wrap for coverage of the exposed polypoid bladder in preoperative care management were referred...
January 26, 2018: International Braz J Urol: Official Journal of the Brazilian Society of Urology
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