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https://www.readbyqxmd.com/read/29913171/longitudinal-profiles-of-relaxin-and-progestagens-during-pregnancy-pregnancy-loss-and-false-pregnancy-in-the-killer-whale-orcinus-orca
#1
Todd R Robeck, Jason L Blum, Karen J Steinman, Jill R Ratner, Don R Bergfelt, Justine K O'Brien
The circulating pattern of immunoreactive relaxin and progestagens based on monthly and gestational stage (early, mid, late) profiles were determined during pregnancies that resulted in live calves (LIVE, n = 30), stillbirths (STILLB, n = 3), abortions (ABORT, n = 5) and presumptive false pregnancies (FALSE, n = 8), and during the follicular (n = 34) and luteal phases (n = 58). Monthly LIVE relaxin concentrations steadily increased during gestation, but values did not significantly exceed those of the luteal phase until 10 months prior to parturition, peaking during the final month at 2,356 ng/ml...
June 15, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29771534/nitroxyl-modified-tobacco-mosaic-virus-as-a-metal-free-high-relaxivity-mri-and-epr-active-superoxide-sensor
#2
Madushani Dharmarwardana, Andre F Martins, Zhuo Chen, Philip Palacios, Chance M Nowak, Raymond P Welch, Shaobo Li, Michael Andrew Luzuriaga, Leonidas Bleris, Brad S Pierce, A Dean Sherry, Jeremiah J Gassensmith
Superoxide overproduction is known to occur in multiple disease states requiring critical care yet non-invasive detection of superoxide in deep tissue remains a challenge. Herein, we report a metal-free magnetic resonance imaging (MRI) and electron paramagnetic resonance (EPR) active contrast agent prepared by "click conjugating" paramagnetic organic radical contrast agents (ORCAs) to the surface of tobacco mosaic virus (TMV). While ORCAs are known to be reduced in vivo to an MRI/EPR silent state, their oxidation is facilitated specifically by reactive oxygen species-in particular superoxide-and are largely unaffected by peroxides and molecular oxygen...
May 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29692289/first-record-of-halocercus-sp-pseudaliidae-lungworm-infections-in-two-stranded-neonatal-orcas-orcinus-orca
#3
A Reckendorf, E Ludes-Wehrmeister, P Wohlsein, R Tiedemann, U Siebert, K Lehnert
Orca (Orcinus orca) strandings are rare and post-mortem examinations on fresh individuals are scarce. Thus, little is known about their parasitological fauna, prevalence of infections, associated pathology and the impact on their health. During post-mortem examinations of two male neonatal orcas stranded in Germany and Norway, lungworm infections were found within the bronchi of both individuals. The nematodes were identified as Halocercus sp. (Pseudaliidae), which have been described in the respiratory tract of multiple odontocete species, but not yet in orcas...
April 25, 2018: Parasitology
https://www.readbyqxmd.com/read/29672290/65th-orca-congress-july-4-7-2017-copenhagen-denmark
#4
(no author information available yet)
No abstract text is available yet for this article.
April 19, 2018: Caries Research
https://www.readbyqxmd.com/read/29601679/shaping-the-future-of-dental-education-caries-as-a-case-study
#5
N B Pitts, M E Mazevet, C Mayne
This study reports on the full-day workshop "The Shape of The Future of Dental Education for Dental Caries-and how we get there" held immediately prior to the May 2017 ADEE/ADEA/King's College London meeting "Shaping the Future of Dental Education." A standardised, evidence-led Core Curriculum in Cariology (CCC) was developed jointly and systematically by ORCA and ADEE, starting in 2010. At the same time, the ICDAS Foundation was developing a comprehensive caries management system, ICCMS™...
March 2018: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/29578535/namd-goes-quantum-an-integrative-suite-for-hybrid-simulations
#6
Marcelo C R Melo, Rafael C Bernardi, Till Rudack, Maximilian Scheurer, Christoph Riplinger, James C Phillips, Julio D C Maia, Gerd B Rocha, João V Ribeiro, John E Stone, Frank Neese, Klaus Schulten, Zaida Luthey-Schulten
Hybrid methods that combine quantum mechanics (QM) and molecular mechanics (MM) can be applied to studies of reaction mechanisms in locations ranging from active sites of small enzymes to multiple sites in large bioenergetic complexes. By combining the widely used molecular dynamics and visualization programs NAMD and VMD with the quantum chemistry packages ORCA and MOPAC, we created an integrated, comprehensive, customizable, and easy-to-use suite (http://www.ks.uiuc.edu/Research/qmmm). Through the QwikMD interface, setup, execution, visualization, and analysis are streamlined for all levels of expertise...
May 2018: Nature Methods
https://www.readbyqxmd.com/read/29559642/infanticide-in-a-mammal-eating-killer-whale-population
#7
Jared R Towers, Muriel J Hallé, Helena K Symonds, Gary J Sutton, Alexandra B Morton, Paul Spong, James P Borrowman, John K B Ford
Infanticide can be an extreme result of sexual conflict that drives selection in species in which it occurs. It is a rarely observed behaviour but some evidence for its occurrence in cetaceans exists in three species of dolphin. Here we describe observations of an adult male killer whale (Orcinus orca) and his post-reproductive mother killing a neonate belonging to an unrelated female from the same population in the North Pacific. This is the first account of infanticide reported in killer whales and the only case committed jointly by an adult male and his mother outside of humans...
March 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29514101/accelerated-evolution-in-distinctive-species-reveals-candidate-elements-for-clinically-relevant-traits-including-mutation-and-cancer-resistance
#8
Elliott Ferris, Lisa M Abegglen, Joshua D Schiffman, Christopher Gregg
The identity of most functional elements in the mammalian genome and the phenotypes they impact are unclear. Here, we perform a genome-wide comparative analysis of patterns of accelerated evolution in species with highly distinctive traits to discover candidate functional elements for clinically important phenotypes. We identify accelerated regions (ARs) in the elephant, hibernating bat, orca, dolphin, naked mole rat, and thirteen-lined ground squirrel lineages in mammalian conserved regions, uncovering ∼33,000 elements that bind hundreds of different regulatory proteins in humans and mice...
March 6, 2018: Cell Reports
https://www.readbyqxmd.com/read/29506012/clinical-diagnosis-of-dental-caries-in-the-21st-century-introductory-paper-orca-saturday-afternoon-symposium-2016
#9
Vita Machiulskiene, Joana Christina Carvalho
Classifications employed to measure dental caries should first of all reflect the dynamics of the disease, in order to provide a solid basis for subsequent treatment decisions and for further monitoring of dental health of individual patients and populations. The contemporary philosophy of dental caries management implies that nonoperative treatment of caries lesions should be implemented whenever possible, limiting operative interventions to the severe and irreversible cases. The ORCA Saturday Afternoon Symposium 2016, held back-to-back to the 63rd ORCA Congress in Athens, Greece, was intended to provide an update on general requirements for clinical caries diagnosis and to overview caries diagnostic classifications including their rationale, validation, advantages, and limitations...
March 5, 2018: Caries Research
https://www.readbyqxmd.com/read/29494811/corrigendum-to-tooth-damage-in-captive-orcas-orcinus-orca-arch-oral-biol-84-2017-151-160
#10
John Jett, Ingrid N Visser, Jeffrey Ventre, Jordan Waltz, Carolina Loch
No abstract text is available yet for this article.
May 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29467271/correction-to-imitation-of-novel-conspecific-and-human-speech-sounds-in-the-killer-whale-orcinus-orca
#11
J Z Abramson, M V Hernández-Lloreda, L García, F Colmenares, F Aboitiz, J Call
No abstract text is available yet for this article.
February 28, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29390732/comments-on-killer-whale-orcinus-orca-behavioral-audiograms-j-acoust-soc-am-141-2387-2398-2017
#12
Henry E Heffner, Rickye S Heffner
Branstetter and his colleagues present the audiograms of eight killer whales and provide a comprehensive review of previous killer whale audiograms. In their paper, they say that the present authors have reported a relationship between size and high-frequency hearing but that echolocating cetaceans might be a special case. The purpose of these comments is to clarify that the relationship of a species' high-frequency hearing is not to its size (mass) but to its "functional interaural distance" (a measure of the availability of sound-localization cues)...
January 2018: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29386364/imitation-of-novel-conspecific-and-human-speech-sounds-in-the-killer-whale-orcinus-orca
#13
José Z Abramson, Mª Victoria Hernández-Lloreda, Lino García, Fernando Colmenares, Francisco Aboitiz, Josep Call
Vocal imitation is a hallmark of human spoken language, which, along with other advanced cognitive skills, has fuelled the evolution of human culture. Comparative evidence has revealed that although the ability to copy sounds from conspecifics is mostly uniquely human among primates, a few distantly related taxa of birds and mammals have also independently evolved this capacity. Remarkably, field observations of killer whales have documented the existence of group-differentiated vocal dialects that are often referred to as traditions or cultures and are hypothesized to be acquired non-genetically...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29360292/the-brussels-statement-on-the-future-needs-for-caries-epidemiology-and-surveillance-in-europe
#14
N B Pitts, N L Carter, G Tsakos
Following debate and discussion prompted by a focussed, day long pre-ORCA Symposium in July 2015, the Alliance for a Cavity-Free Future Pan-European Chapter, the Platform for Better Oral Health in Europe, and the European Association of Dental Public Health have agreed this statement on the future needs for caries epidemiology and surveillance in Europe. Each organisation agreed to support the planned publication of the Statement, and will make it available on their Organisation's websites and strive to implement its recommendations...
November 28, 2017: Community Dental Health
https://www.readbyqxmd.com/read/29331879/structural-and-quantum-mechanical-computations-to-elucidate-the-altered-binding-mechanism-of-metal-and-drug-with-pyrazinamidase-from-mycobacterium-tuberculosis-due-to-mutagenicity
#15
Nouman Rasool, Saima Iftikhar, Anam Amir, Waqar Hussain
Pyrazinamide is known to be the most effective treatment against tuberculosis disease and is known to have bacteriostatic action. By targeting the bacterial spores, this drug reduces the chances for the progression of the infection in organisms. In recent years, increased instances of the drug resistance of bacterial strains are reported. Pyrazinamidase, activator for pyrazinamide, leads to resistance against the drug due to mutagenicity across the world. The present study aimed at the quantum mechanistic analysis of mutations in pyrazinamidase to gain insights into the mechanism of this enzyme...
March 2018: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/29224004/orca-priorities-and-state-of-play-in-2017
#16
Joana Carvalho
No abstract text is available yet for this article.
2018: Caries Research
https://www.readbyqxmd.com/read/29196046/prehospital-antibiotics-in-the-ambulance-for-sepsis-a-multicentre-open-label-randomised-trial
#17
Nadia Alam, Erick Oskam, Patricia M Stassen, Pieternel van Exter, Peter M van de Ven, Harm R Haak, Frits Holleman, Arthur van Zanten, Hien van Leeuwen-Nguyen, Victor Bon, Bart A M Duineveld, Rishi S Nannan Panday, Mark H H Kramer, Prabath W B Nanayakkara
BACKGROUND: Emergency medical services (EMS) personnel have already made substantial contributions to improving care for patients with time-dependent illnesses, such as trauma and myocardial infarction. Patients with sepsis could also benefit from timely prehospital care. METHODS: After training EMS personnel in recognising sepsis, we did a randomised controlled open-label trial in ten large regional ambulance services serving 34 secondary and tertiary care hospitals in the Netherlands...
January 2018: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29178468/dft-calculations-of-the-defect-structures-electronic-structures-and-epr-parameters-for-three-rh-2-centers-in-agcl
#18
Li-Na Wu, Shao-Yi Wu, Si-Ying Zhong, Li-Juan Zhang, Qin-Qin Tan
The local structures for various Rh2+ centers in AgCl are theoretically studied using density functional theory (DFT) with periodic CP2K program. Through geometry optimizing, the stable ground states with minimal energies and electronic structures are obtained for the tetragonally elongated (TE ), orthorhombically elongated (OE ), and tetragonally compressed (TC ) centers, and the corresponding g and hyperfine coupling tensors are calculated in ORCA level. The calculations reveal obvious Jahn-Teller elongation distortions of about 0...
March 2018: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/29158502/competing-tradeoffs-between-increasing-marine-mammal-predation-and-fisheries-harvest-of-chinook-salmon
#19
Brandon E Chasco, Isaac C Kaplan, Austen C Thomas, Alejandro Acevedo-Gutiérrez, Dawn P Noren, Michael J Ford, M Bradley Hanson, Jonathan J Scordino, Steven J Jeffries, Kristin N Marshall, Andrew O Shelton, Craig Matkin, Brian J Burke, Eric J Ward
Many marine mammal predators, particularly pinnipeds, have increased in abundance in recent decades, generating new challenges for balancing human uses with recovery goals via ecosystem-based management. We used a spatio-temporal bioenergetics model of the Northeast Pacific Ocean to quantify how predation by three species of pinnipeds and killer whales (Orcinus orca) on Chinook salmon (Oncorhynchus tshawytscha) has changed since the 1970s along the west coast of North America, and compare these estimates to salmon fisheries...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29148044/the-incidence-of-bent-dorsal-fins-in-free-ranging-cetaceans
#20
F Alves, J R Towers, R W Baird, G Bearzi, S Bonizzoni, R Ferreira, Z Halicka, A Alessandrini, A H Kopelman, C Yzoard, M H Rasmussen, C G Bertulli, E Jourdain, A Gullan, D Rocha, K Hupman, M-T Mrusczok, F I P Samarra, S Magalhães, C R Weir, J K B Ford, A Dinis
Laterally bent dorsal fins are rarely observed in free-ranging populations of cetaceans, contrary to captivity, where most killer whale Orcinus orca adult males have laterally collapsed fins. This topic has been poorly explored, and data/information on its occurrence and possible causes are limited. The present study: (i) undertakes a review of the available information on bent dorsal fins in free-ranging cetaceans, and updates it with new records, (ii) reports on the proportion of bent fins in different study populations, and (iii) discusses possible causes...
February 2018: Journal of Anatomy
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