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https://www.readbyqxmd.com/read/28934330/an-analysis-of-beak-shape-variation-in-two-ages-of-domestic-turkeys-meleagris-gallopavo-using-landmark-based-geometric-morphometrics
#1
Hillary A Dalton, Benjamin J Wood, Tina M Widowski, Michele T Guerin, Stephanie Torrey
The objective of this study was to assess beak shape variation in domestic turkeys (Meleagris gallopavo) and determine the effects of age, sex, and beak size on beak shape variation using geometric morphometrics. Dorsal and right lateral images were taken of 2442 turkeys at 6 and 18.5 weeks of age. Landmarks were digitized in tpsDig in three analyses of the dorsal upper mandible, lateral upper mandible, and lateral lower mandible shape of each turkey at both ages. The coordinate data were then subjected to a principal components analysis (PCA), multivariate regression, and a canonical variates analysis (CVA) with a Procrustes ANOVA in MorphoJ...
2017: PloS One
https://www.readbyqxmd.com/read/28933472/gas-adsorption-capacity-in-an-all-carbon-nanomaterial-composed-of-carbon-nanohorns-and-vertically-aligned-carbon-nanotubes
#2
Divya Puthusseri, Deepu J Babu, Sherif Okeil, Jörg J Schneider
Whereas vertically aligned carbon nanotubes (VACNTs) typically show a promising adsorption behavior at high pressures, carbon nanohorns (CNHs) exhibit superior gas adsorption properties in the low pressure regime due to their inherent microporosity. These adsorption characteristics are further enhanced when both materials are opened at their tips. The so prepared composite material allows one to investigate the effect of physical entrapment of CO2 molecules within the specific adsorption sites of VACNTs composed of opened double walled carbon nanotubes (CNTs) and in specific adsorption sites created by spherically aggregated opened single walled carbon nanohorns...
September 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28931716/field-swimming-behavior-in-largemouth-bass-deviates-from-predictions-based-on-economy-and-propulsive-efficiency
#3
Angela X Han, Caroline Berlin, David J Ellerby
Locomotion is energetically expensive. This may create selection pressures that favor economical locomotor strategies, such as the adoption of low-cost speeds and efficient propulsive movements. For swimming fish, the energy expended to travel a unit distance, or cost of transport (COT), has a U-shaped relationship to speed. The relationship between propulsive kinematics and speed, summarized by the Strouhal number (St=fA/U, where f is tail beat frequency, A is tail tip amplitude in m and U is swimming speed in m s(-1)), allows for maximal propulsive efficiency where 0...
September 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28928635/d-tubocurarine-and-berbamine-alkaloids-that-are-permeant-blockers-of-the-hair-cell-s-mechano-electrical-transducer-channel-and-protect-from-aminoglycoside-toxicity
#4
Nerissa K Kirkwood, Molly O'Reilly, Marco Derudas, Emma J Kenyon, Rosemary Huckvale, Sietse M van Netten, Simon E Ward, Guy P Richardson, Corné J Kros
Aminoglycoside antibiotics are widely used for the treatment of life-threatening bacterial infections, but cause permanent hearing loss in a substantial proportion of treated patients. The sensory hair cells of the inner ear are damaged following entry of these antibiotics via the mechano-electrical transducer (MET) channels located at the tips of the hair cell's stereocilia. d-Tubocurarine (dTC) is a MET channel blocker that reduces the loading of gentamicin-Texas Red (GTTR) into rat cochlear hair cells and protects them from gentamicin treatment...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28928141/a-genetic-screen-for-impaired-systemic-rnai-highlights-the-crucial-role-of-dicer-like-2
#5
Christelle Taochy, Nial R Gursanscky, Jiangling Cao, Stephen J Fletcher, Uwe Dressel, Neena Mitter, Matthew R Tucker, Anna M Koltunow, John L Bowman, Hervé Vaucheret, Bernard J Carroll
Post-transcriptional gene silencing (PTGS) of transgenes involves abundant 21 nt small interfering RNAs (siRNAs) and low abundance 22 nt siRNAs produced from double-stranded RNA (dsRNA) by DCL4 and DCL2, respectively. However, DCL2 facilitates the recruitment of RNA-DEPENDENT RNA POLYMERASE 6 (RDR6) to ARGONAUTE 1 (AGO1)-derived cleavage products, resulting in more efficient amplification of secondary and transitive dsRNA and siRNAs. Here, we describe a reporter system where RDR6-dependent PTGS is initiated by restricted expression of an inverted-repeat dsRNA specifically in the root tip, allowing a genetic screen to identify mutants impaired in RDR6-dependent systemic PTGS...
September 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28924077/perforation-of-the-left-atrial-appendage-caused-by-inadvertent-deployment-of-a-soft-j-tipped-guidewire-during-radiofrequency-hot-balloon-ablation
#6
Hiro Yamasaki, Fumi Yamagami, Takeshi Machino, Kenji Kuroki, Yukio Sekiguchi, Kazutaka Aonuma, Akihiko Nogami
No abstract text is available yet for this article.
September 16, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28924020/microindentation-a-tool-for-measuring-cortical-bone-stiffness-a-systematic-review
#7
M Arnold, S Zhao, S Ma, F Giuliani, U Hansen, J P Cobb, R L Abel, O Boughton
OBJECTIVES: Microindentation has the potential to measure the stiffness of an individual patient's bone. Bone stiffness plays a crucial role in the press-fit stability of orthopaedic implants. Arming surgeons with accurate bone stiffness information may reduce surgical complications including periprosthetic fractures. The question addressed with this systematic review is whether microindentation can accurately measure cortical bone stiffness. METHODS: A systematic review of all English language articles using a keyword search was undertaken using Medline, Embase, PubMed, Scopus and Cochrane databases...
September 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28923004/regulatory-networks-underlying-mycorrhizal-development-delineated-by-genome-wide-expression-profiling-and-functional-analysis-of-the-transcription-factor-repertoire-of-the-plant-symbiotic-fungus-laccaria-bicolor
#8
Y Daguerre, E Levati, J Ruytinx, E Tisserant, E Morin, A Kohler, B Montanini, S Ottonello, A Brun, C Veneault-Fourrey, F Martin
BACKGROUND: Ectomycorrhizal (ECM) fungi develop a mutualistic symbiotic interaction with the roots of their host plants. During this process, they undergo a series of developmental transitions from the running hyphae in the rhizosphere to the coenocytic hyphae forming finger-like structures within the root apoplastic space. These transitions, which involve profound, symbiosis-associated metabolic changes, also entail a substantial transcriptome reprogramming with coordinated waves of differentially expressed genes...
September 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28921571/comparing-touch-senses-of-na%C3%A3-ve-and-expert-panels-through-treated-hair-swatches-which-associated-wordings-correlate-with-hair-physical-properties
#9
Anthony Galliano, Jean Yves Kempf, Maxime Fougere, Mara Applebaum, Leszek J Wolfram, Howard Maibach
OBJECTIVES: The study i) compared sense of touch between a naïve and an expert panels, under visual or blind conditions, using differently treated hair swatches, ii) explored possible common wordings used by both panels and their possible links with some physical properties of hairs. METHODS: Two sets of 15 hair swatches of Caucasian and Chinese origins were differently treated (bleached, permed, brushed, etc) or organized (root-tip vs tip-root). These were evaluated by tactile assessments by two panels (105 naïve consumers and 10 hair experts) under visual or blind conditions, in two geographic locations...
September 16, 2017: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/28902876/postoperative-lead-migration-in-deep-brain-stimulation-surgery-incidence-risk-factors-and-clinical-impact
#10
Takashi Morishita, Justin D Hilliard, Michael S Okun, Dan Neal, Kelsey A Nestor, David Peace, Alden A Hozouri, Mark R Davidson, Francis J Bova, Justin M Sporrer, Genko Oyama, Kelly D Foote
INTRODUCTION: Deep brain stimulation (DBS) is an effective treatment for multiple movement disorders and shows substantial promise for the treatment of some neuropsychiatric and other disorders of brain neurocircuitry. Optimal neuroanatomical lead position is a critical determinant of clinical outcomes in DBS surgery. Lead migration, defined as an unintended post-operative displacement of the DBS lead, has been previously reported. Despite several reports, however, there have been no systematic investigations of this issue...
2017: PloS One
https://www.readbyqxmd.com/read/28899829/multi-scale-mechanical-characterization-of-prostate-cancer-cell-lines-relevant-biological-markers-to-evaluate-the-cell-metastatic-potential
#11
J Zouaoui, A M Trunfio-Sfarghiu, L Brizuela, A Piednoir, O Maniti, B Munteanu, S Mebarek, A Girard-Egrot, A Landoulsi, T Granjon
BACKGROUND: Considering the importance of cellular mechanics in the birth and evolution of cancer towards increasingly aggressive stages, we compared nano-mechanical properties of non-tumoral (WPMY-1) and highly aggressive metastatic (PC-3) prostate cell lines both on cell aggregates, single cells, and membrane lipids. METHODS: Cell aggregate rheological properties were analyzed during dynamic compression stress performed on a homemade rheometer. Single cell visco-elasticity measurements were performed by Atomic Force Microscopy using a cantilever with round tip on surface-attached cells...
September 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28895509/mycoplasma-tullyi-sp-nov-isolated-from-penguins-of-the-genus-spheniscus
#12
Christine A Yavari, Ana S Ramírez, Robin A J Nicholas, Alan D Radford, Alistair C Darby, Janet M Bradbury
A mycoplasma isolated from the liver of a dead Humboldt penguin (Spheniscus humboldti) and designated strain 56A97T, was investigated to determine its taxonomic status. Complete 16S rRNA gene sequence analysis indicated that the organism was most closely related to Mycoplasma gallisepticum and Mycoplasma imitans(99.7 and 99.9 % similarity, respectively). The average DNA-DNA hybridization values between strain 56A97T and M. gallisepticum and M. imitans were 39.5 and 30 %, respectively and the Genome to Genome Distance Calculator gave results of 29...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28895432/intraductal-laser-fiber-tip-fracture-and-retrieval-during-sialendoscopic-laser-assisted-lithotripsy
#13
Andrew J Goates, Raymond W Kung, Chad R Tracy, Henry T Hoffman
Fragmentation of flexible laser fiber tips has been reported to occur during therapeutic bronchoscopy and urologic stone treatment. We report fragmentation of 200-µm single-use silica-based fibers during sialendoscopy-controlled Holmium:YAG laser treatment of a parotid and a submandibular stone. The technique employed to successfully retrieve the fiber tips is described in the context of identifying this potential complication from endoscopic management of sialolithiasis.
September 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28894239/dissecting-the-link-between-the-enzymatic-activity-and-the-sapi-inducing-capacity-of-the-phage-80%C3%AE-dutpase
#14
Christian Alite, Suzanne Humphrey, Jordi Donderis, Elisa Maiques, J Rafael Ciges-Tomas, José R Penadés, Alberto Marina
The trimeric staphylococcal phage-encoded dUTPases (Duts) are signalling molecules that induce the cycle of some Staphylococcal pathogenicity islands (SaPIs) by binding to the SaPI-encoded Stl repressor. To perform this regulatory role, these Duts require an extra motif VI, as well as the Dut conserved motifs IV and V. While the apo form of Dut is required for the interaction with the Stl repressor, usually only those Duts with normal enzymatic activity can induce the SaPI cycle. To understand the link between the enzymatic activities and inducing capacities of the Dut protein, we analysed the structural, biochemical and physiological characteristics of the Dut80α D95E mutant, which loses the SaPI cycle induction capacity despite retaining enzymatic activity...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893712/single-session-percutaneous-endovascular-mesocaval-shunt-creation-and-balloon-occluded-retrograde-transvenous-obliteration-for-the-treatment-of-gastric-varices
#15
Ravi Nara Srinivasa, Bill S Majdalany, Jeffrey Forris Beecham Chick, J Matthew Meadows, Jordan Bruce Fenlon, Charles Brewerton, Wael E Saad
In the setting of portal hypertension, the body responds by creating portosystemic venous shunts which may lead to the development of varices. Endoscopic treatment of these varices is often warranted to prevent catastrophic bleeding. During the course of variceal treatment, one or more portosystemic shunts may be sacrificed which may acutely exacerbate portal hypertension and reduce systemic venous return. This report describes percutaneous creation of a mesocaval shunt and balloon-occluded retrograde transvenous obliteration (BRTO) in a patient with cavernous transformation of the portal vein...
September 8, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28892743/ion-macromolecule-interactions-studied-with-model-polyurethanes
#16
Borja Fernández-d'Arlas, Miguel Ángel Huertos, Alejandro J Müller
HYPOTHESIS: The solubility and self-assembly of macromolecules in solution can be tuned by the presence of different salts. Natural proteins have been long manipulated with the aid of salts, and natural silk is processed in the gland tip across a gradient of different salts which modifies its solubility. Hence, the comprehensive understanding of the role of ion-macromolecule interactions should pave the way towards a biomimetic processing of macromolecules. EXPERIMENTS: A model polyurethane catiomer (PU(+)) with high density of hydrogen donors and acceptors (similar to proteins) has been designed and synthesized in order to study ion-macromolecule interactions by means of dynamic light scattering (DLS), infrared spectroscopy (FTIR) and nuclear magnetic resonance ((13)C NMR)...
September 2, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28892263/regulation-of-germ-cell-development-by-intercellular-signaling-in-the-mammalian-ovarian-follicle
#17
REVIEW
Hugh J Clarke
Prior to ovulation, the mammalian oocyte undergoes a process of differentiation within the ovarian follicle that confers on it the ability to give rise to an embryo. Differentiation comprises two phases-growth, during which the oocyte increases more than 100-fold in volume as it accumulates macromolecules and organelles that will sustain early embryogenesis; and meiotic maturation, during which the oocyte executes the first meiotic division and prepares for the second division. Entry of an oocyte into the growth phase appears to be triggered when the adjacent granulosa cells produce specific growth factors...
September 11, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28890621/soft-tissue-applications-of-er-cr-ysgg-laser-in-pediatric-dentistry
#18
Gyanendra Kumar, Ferah Rehman, Vivek Chaturvedy
Soft tissue laser, such as diode and Nd:YAG lasers were initially used in soft tissue lesions because of its increased success rate. It was because of the fact that these lasers were well-absorbed by chromophores, such as hemoglobin and melanin which are found abundant in the oral mucosa. The introduction of erbium family in 1990 comprising the Er:YAG and Er,Cr:YSGG lasers made the hard tissue laser a boon for dentistry. Erbium, chromium-doped yttrium, scandium, gallium and garnet (Er,Cr:YSGG) was introduced in 1997 for the surgical needs of clinical dentistry in general practice...
April 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28888263/epidemiology-of-racial-ethnic-disparities-in-severe-maternal-morbidity-and-mortality
#19
Sarah J Holdt Somer, Rachel G Sinkey, Allison S Bryant
The literature abounds with examples of racial/ethnic disparities in both obstetric outcomes and care. Disparities in maternal mortality are well documented with non-Hispanic blacks carrying the burden of the highest maternal mortality rates. Maternal deaths likely represent only the "tip of the iceberg" with respect to pregnancy complications, leading many to explore risk factors and disparities in severe maternal morbidity, a more common precursor to maternal mortality. This review article explores commonly cited indicators of severe maternal morbidity and includes a review of the epidemiological literature supporting or refuting disparities among each indicator...
August 2017: Seminars in Perinatology
https://www.readbyqxmd.com/read/28886779/teaching-tips-and-costs
#20
REVIEW
David J Dries
No abstract text is available yet for this article.
September 2017: Air Medical Journal
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