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https://www.readbyqxmd.com/read/29793156/mechanical-properties-of-the-human-scalp-in-tension
#1
Lisa Falland-Cheung, Mario Scholze, Pamela F Lozano, Benjamin Ondruschka, Darryl C Tong, Paul A Brunton, J Neil Waddell, Niels Hammer
Mechanical properties of the human scalp have not been investigated to a great extent with limited information available. The purpose of this study was to provide new baseline material data for human scalp tissue of various ages, which can be applied to experimental and constitutive models, such as in the area of impact biomechanics. This study used specimens from the left and right temporal, fronto-parietal and occipital regions of the human scalp. It investigated the tensile behavior of scalp tissue using tissues harvested from unfixed, fresh cadavers...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29791139/dynamic-ligand-presentation-in-biomaterials
#2
Joshua Hammer, Jennifer L West
The native cell microenvironment is extraordinarily dynamic, with reciprocal regulation pathways between cells and the extracellular matrix guiding many physiological processes, such as cell migration, stem cell differentiation, and tissue formation. Providing the correct sequence of biochemical cues to cells, both in vivo and in vitro, is critical for triggering specific biological outcomes. There has been a diversity of methods developed for exposing cells in culture to spatiotemporally varying cues, many of which have centered on dynamic control over cell-material interactions in an attempt to recapitulate the role of the extracellular matrix in cell signaling...
May 23, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29789970/motile-dendritic-cells-sense-and-respond-to-substrate-geometry
#3
Amy C Bendell, Nicholas Anderson, Daniel Blumenthal, Edward K Williamson, Christopher S Chen, Janis K Burkhardt, Daniel A Hammer
Dendritic cell (DC) migration is required for efficient presentation of antigen to T cells and the initiation of an adaptive immune response. In spite of its importance, many aspects of DC migration have not been characterized. DCs encounter a variety of environments with different stiffness and geometry, but the effect of these parameters on DC migration has not yet been determined. We addressed this question by comparing DC motility on standard migration surfaces (polydimethylsiloxane (PDMS)-coated coverslips) and micropost array detectors (mPADs)...
May 22, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29789596/cervical-vagus-nerve-morphometry-and-vascularity-in-the-context-of-nerve-stimulation-a-cadaveric-study
#4
Niels Hammer, Sabine Löffler, Yusuf Ozgur Cakmak, Benjamin Ondruschka, Uwe Planitzer, Michael Schultz, Dirk Winkler, David Weise
Vagus nerve stimulation (VNS) has become a well-established therapy for epilepsy and depression, and is emerging to treat inflammatory disease, with the cervical vagus nerve (CVN) as major stimulation site. CVN morphometries are missing for VNS, considering its variability. Morphometric data were obtained from CVNs in 27 cadavers, including branching patterns and histology. Cross-sectional area, greater and lesser diameters averaged 7.2 ± 3.1 mm2 , 5.1 ± 1.5 and 4.1 ± 1.3 mm, and were ≤11...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29787528/increased-trauma-activation-is-not-equally-beneficial-for-all-elderly-trauma-patients
#5
Bryan W Carr, Peter M Hammer, Lava Timsina, Grace Rozycki, David V Feliciano, Jamie J Coleman
BACKGROUND: Physiologic changes in the elderly lead to higher morbidity and mortality after injury. Increasing level of trauma activation has been proposed to improve geriatric outcomes; but, the increased cost to the patient and stress to the hospital system are significant downsides. The purpose of this study was to identify the age at which an increase in activation status is beneficial. METHODS: A retrospective review of trauma patients ≥ 70 years old from October 1, 2011, to October 1, 2016 was performed...
May 21, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29775230/alcohol-enhances-symptoms-and-propensity-for-infection-in-inflammatory-bowel-disease-patients-and-a-murine-model-of-dss-induced-colitis
#6
Abigail R Cannon, Paulius V Kuprys, Adrienne N Cobb, Xianzhong Ding, Anai N Kothari, Paul C Kuo, Joshua M Eberhardt, Adam M Hammer, Niya L Morris, Xiaoling Li, Mashkoor A Choudhry
Over 1.4 million Americans have been diagnosed with inflammatory bowel disease (IBD), and ulcerative colitis (UC) makes up approximately half of those diagnoses. As a disease, UC cycles between periods of remission and flare, which is characterized by intense abdominal pain, increased weight loss, intestinal inflammation, rectal bleeding, and dehydration. Interestingly, a widespread recommendation to IBD patients for avoidance of a flare period is "Don't Drink Alcohol" as recent work correlated alcohol consumption with increased GI symptoms in patients with IBD...
May 18, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29768421/theoretical-analysis-and-design-of-hydro-hammer-with-a-jet-actuator-an-engineering-application-to-improve-the-penetration-rate-of-directional-well-drilling-in-hard-rock-formations
#7
Jiang-Fu He, Yun-Pei Liang, Li-Jia Li, Yong-Jiang Luo
Rapid horizontal directional well drilling in hard or fractured formations requires efficient drilling technology. The penetration rate of conventional hard rock drilling technology in horizontal directional well excavations is relatively low, resulting in multiple overgrinding of drill cuttings in bottom boreholes. Conventional drilling techniques with reamer or diamond drill bit face difficulties due to the long construction periods, low penetration rates, and high engineering costs in the directional well drilling of hard rock...
2018: PloS One
https://www.readbyqxmd.com/read/29763455/correction-mrna-mediated-gene-supplementation-of-toll-like-receptors-as-treatment-strategy-for-asthma-in-vivo
#8
Franziska Zeyer, Benedikt Mothes, Clara Will, Melanie Carevic, Jennifer Rottenberger, Bernd Nürnberg, Dominik Hartl, Rupert Handgretinger, Sandra Beer-Hammer, Michael S D Kormann
[This corrects the article DOI: 10.1371/journal.pone.0154001.].
2018: PloS One
https://www.readbyqxmd.com/read/29762582/dispersion-tuning-in-sub-micron-tapers-for-third-harmonic-and-photon-triplet-generation
#9
Jonas Hammer, Andrea Cavanna, Riccardo Pennetta, Maria V Chekhova, Philip St J Russell, Nicolas Y Joly
Precise control of the dispersion landscape is of crucial importance if optical fibers are to be successfully used for the generation of three-photon states of light-the inverse of third-harmonic generation (THG). Here we report gas-tuning of intermodal phase-matched THG in sub-micron-diameter tapered optical fiber. By adjusting the pressure of the surrounding argon gas up to 50 bars, intermodally phase-matched third-harmonic light can be generated for pump wavelengths within a 15 nm range around 1.38 μm...
May 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29761208/location-of-a-grasped-object-s-effector-influences-perception-of-the-length-of-that-object-via-dynamic-touch
#10
Madhur Mangalam, James D Conners, Dorothy M Fragaszy, Karl M Newell
Perception of properties of a grasped object via dynamic touch (wielding) contributes to dexterity in tool use (e.g., using a hammer, screwdriver) and sports (e.g., hockey, tennis). These activities differ from simple object manipulation in that they involve making contact with an intended target. In the present study, we examined whether and how making (percussive) contact with a target influences perception of the length of a grasped object via dynamic touch. Making contact with a target by the tip resulted in a more accurate perception of the length than simple wielding...
May 14, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29760210/the-state-of-the-union-is-strong-a-review-of-asm-s-6-th-conference-on-cell-cell-communication-in-bacteria
#11
Sam P Brown, Helen E Blackwell, Brian K Hammer
The sixth American Society for Microbiology Conference on Cell-Cell Communication in Bacteria convened from 16-19 October 2017 in Athens, GA. In this minireview, we highlight some of the research presented at that meeting that addresses central questions emerging in the field: How are cell-cell communication circuits designed to generate responses? Where are bacteria communicating? And why are bacteria engaging in such behaviors?
May 14, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29758007/characterization-of-rhamnolipids-produced-by-an-arctic-marine-bacterium-from-the-pseudomonas-fluorescence-group
#12
Venke Kristoffersen, Teppo Rämä, Johan Isaksson, Jeanette Hammer Andersen, William H Gerwick, Espen Hansen
The marine environment is a rich source of biodiversity, including microorganisms that have proven to be prolific producers of bioactive secondary metabolites. Arctic seas are less explored than warmer, more accessible areas, providing a promising starting point to search for novel bioactive compounds. In the present work, an Arctic marine Pseudomonas sp. belonging to the Pseudomonas (P.) fluorescence group was cultivated in four different media in an attempt to activate biosynthetic pathways leading to the production of antibacterial and anticancer compounds...
May 14, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29757361/effects-of-rhinoplasty-on-labyrinthine-function
#13
Ahmet Mahmut Tekin, Erkan Soylu, Handan Turan Dizdar, Fahrettin Yilmaz, Yildirim Ahmet Bayazit
Background: Rhinoplasty is a common surgical procedure that is requested and accepted by patients for cosmetic and functional reasons. Osteotomies are performed on nasal bone, maxillary crest, or vomer to fix the deviations of the nasal dorsum or septum. During the percussion of the osteotomes with the surgical mallet, the vibration energy diffuses to the cranium. Auditory and vestibular systems may be affected by these vibrations. Objectives: To assess the effects of rhinoplasty, in which osteotomies were performed using a hammer, on the audiovestibular system...
May 11, 2018: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29756789/emotional-demands-and-alcohol-use-in-corrections-a-moderated-mediation-model
#14
Brittnie R Shepherd, Charlotte Fritz, Leslie B Hammer, Frankie Guros, David Meier
This study examined predictors of alcohol use (i.e., drinking quantity and frequency) in a sample of correctional officers (COs). More specifically, based on the idea of drinking to cope, we predicted an indirect effect of emotional demands at work on COs' drinking through employee burnout (i.e., exhaustion and disengagement). We further proposed that this indirect effect would be moderated by recovery experiences outside of work (i.e., psychological detachment and mastery). Participants were 1,039 COs from 14 state correctional facilities...
May 14, 2018: Journal of Occupational Health Psychology
https://www.readbyqxmd.com/read/29756196/endovascular-treatment-of-thoracoabdominal-aortic-aneurysm-in-loeys-dietz-syndrome
#15
Tomasz Jakimowicz, Michał Macech, Piotr Hammer, Tadeusz Grochowiecki, Sławomir Nazarewski
No abstract text is available yet for this article.
2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29750837/subordinate-females-in-the-cooperatively-breeding-seychelles-warbler-obtain-direct-benefits-by-joining-unrelated-groups
#16
Frank Groenewoud, Sjouke A Kingma, Martijn Hammers, Hannah L Dugdale, Terry Burke, David S Richardson, Jan Komdeur
1.In many cooperatively breeding animals, a combination of ecological constraints and benefits of philopatry favours offspring taking a subordinate position on the natal territory instead of dispersing to breed independently. However, in many species individuals disperse to a subordinate position in a non-natal group ("subordinate between-group" dispersal), despite losing the kin-selected and nepotistic benefits of remaining in the natal group. It is unclear which social, genetic and ecological factors drive between-group dispersal...
May 11, 2018: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29749844/teaching-assistant-attention-and-responsiveness-to-student-reasoning-in-written-work
#17
Cynthia F C Hill, Julia S Gouvea, David Hammer
Instructors communicate what they value about students' written work through their comments and feedback, and this feedback has the potential to direct how students approach writing assignments. In this study, we examined how graduate student teaching assistants (TAs) attended and responded to students' written lab reports in an introductory biology course. We collected and analyzed marked lab reports from five TAs and interviewed them about their marking decisions. The results show that TAs attended mainly to writing style and form in their markings and comments on lab reports...
June 2018: CBE Life Sciences Education
https://www.readbyqxmd.com/read/29742576/comparison-of-piezosurgery-and-hammer-chisel-in-endoscopic-dacryocystorhinostomy
#18
Ibrahim Çukurova, Suphi Bulğurcu, Ilker Burak Arslan, Bünyamin Dikilitaş
BACKGROUND: In this study, we compared the advantages and disadvantages of piezosurgery and hammer-chisel used in endoscopic dacryocystorhinostomy (EDCR). MATERIAL AND METHODS: Between January 2012 and January 2016, 10 women and 8 men in whom piezosurgery was used (group 1) and 11 women and 7 men in whom hammer-chisel was used (group 2) during EDCR operations were compared retrospectively. Recurrence, operation time, postoperative bleeding, and operative cost were evaluated in patients who were followed for an average of 11...
May 8, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29738824/radiologic-pseudoprogression-during-anti-pd1-therapy-for-advanced-non-small-cell-lung-cancer
#19
Sharyn I Katz, Mark Hammer, Stephen Bagley, Charu Aggarwal, Joshua Bauml, Jeffrey C Thompson, Arun C Nachiappan, Charles B Simone, Corey Langer
INTRODUCTION: Anti-PD1 (programmed cell death protein 1) therapy can lead to unconventional tumor responses including radiologic pseudoprogression. Here we determine the real-world incidence of radiologic pseudoprogression in advanced non-small cell lung cancer (NSCLC) and compare radiologic response criteria for disease response assessment. METHODS: Electronic medical records of all NSCLC patients receiving anti-PD1 therapy at our institution over a 3-year period were retrospectively reviewed and patients with clinically suspected radiologic pseudoprogression identified...
May 5, 2018: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/29737978/corrigendum-collocated-observations-of-cloud-condensation-nuclei-particle-size-distributions-and-chemical-composition
#20
Julia Schmale, Silvia Henning, Bas Henzing, Helmi Keskinen, Karine Sellegri, Jurgita Ovadnevaite, Aikaterini Bougiatioti, Nikos Kalivitis, Iasonas Stavroulas, Anne Jefferson, Minsu Park, Patrick Schlag, Adam Kristensson, Yoko Iwamoto, Kirsty Pringle, Carly Reddington, Pasi Aalto, Mikko Äijälä, Urs Baltensperger, Jakub Bialek, Wolfram Birmili, Nicolas Bukowiecki, Mikael Ehn, Ann Mari Fjæraa, Markus Fiebig, Göran Frank, Roman Fröhlich, Arnoud Frumau, Masaki Furuya, Emanuel Hammer, Liine Heikkinen, Erik Herrmann, Rupert Holzinger, Hiroyuki Hyono, Maria Kanakidou, Astrid Kiendler-Scharr, Kento Kinouchi, Gerard Kos, Markku Kulmala, Nikolaos Mihalopoulos, Ghislain Motos, Athanasios Nenes, Colin O'Dowd, Mikhail Paramonov, Tuukka Petäjä, David Picard, Laurent Poulain, André Stephan Henry Prévôt, Jay Slowik, Andre Sonntag, Erik Swietlicki, Birgitta Svenningsson, Hiroshi Tsurumaru, Alfred Wiedensohler, Cerina Wittbom, John A Ogren, Atsushi Matsuki, Seong Soo Yum, Cathrine Lund Myhre, Ken Carslaw, Frank Stratmann, Martin Gysel
This corrects the article DOI: 10.1038/sdata.2017.3.
May 8, 2018: Scientific Data
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