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https://www.readbyqxmd.com/read/28642647/comparison-between-rendering-3d-ct-and-transparent-3d-ct-in-acl-tunnel-positioning
#1
Marcos Amstalden Barros, Tiago Lazzaretti Fernandes, Dimitris Dimitriou, André Pedrinelli, Arnaldo José Hernandez
OBJECTIVE: To compare the transparent 3D computed tomography (CT) image protocol against conventional 3D-CT image-rendering protocol to assess femoral tunnel position in anatomic anterior cruciate ligament (ACL) reconstructions . METHODS: Eight knee CT scans from cadavers were analyzed by image rendering 3D-CT protocol, using Rhinoceros((r)) software. The central point of the ACL tunnel was set using the sagittal plane. Same CT scans were analyzed using transparent 3D-CT measurement protocol with OsiriX((r)) software...
January 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28624290/feasibility-of-reducing-differences-in-estimated-doses-in-nuclear-medicine-between-a-patient-specific-and-a-reference-phantom
#2
Alexandra Zvereva, Helmut Schlattl, Maria Zankl, Janine Becker, Nina Petoussi-Henss, Yeon Soo Yeom, Chan Hyeong Kim, Christoph Hoeschen, Katia Parodi
The feasibility of reducing the differences between patient-specific internal doses and doses estimated using reference phantoms was evaluated. Relatively simple adjustments to a polygon-surface ICRP adult male reference phantom were applied to fit selected individual dimensions using the software Rhinoceros®4.0. We tested this approach on two patient-specific phantoms: the biggest and the smallest phantoms from the Helmholtz Zentrum München library. These phantoms have unrelated anatomy and large differences in body-mass-index...
June 14, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28553355/innovative-3d-model-of-the-human-middle-ear-in-high-resolution-with-a-histological-microgrinding-method-a-feasibility-study-and-comparison-with-%C3%AE-ct
#3
Susanne Bradel, Laura Doniga-Crivat, Silke Besdo, Franziska Lexow, Michael Fehr, Thomas Lenarz, Nils Prenzler, Gudrun Brandes
Conclusion. The development of a histological 3D model of the tympanic cavity visualizes the exact microanatomy of the sound conduction organ and is therefore essential for finite elements simulations and surgical training. Objectives. So far, no accurate histological 3D model of the sound conduction system existed in literature. For 3D reconstruction of the very fine structures inside and outside the auditory ossicles, a method based on histological slices allows a more differential analysis of both hard and soft tissues and could thus be superior to μCT...
2017: International Journal of Otolaryngology
https://www.readbyqxmd.com/read/28552926/modelling-and-structural-analysis-of-skull-cranial-implant-beyond-mid-line-deformities
#4
V Phanindra Bogu, Y Ravi Kumar, Asit Kumar Khanara
PURPOSE: This computational study explores modelling and finite element study of the implant under Intracranial pressure (ICP) conditions with normal ICP range (7 mm Hg to 15 mm Hg) or increased ICP (>I5 mm Hg). The implant fixation points allow implant behaviour with respect to intracranial pressure conditions. However, increased fixation points lead to variation in deformation and equivalent stress. Finite element analysis is providing a valuable insight to know the deformation and equivalent stress...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28474182/homogenous-scaffold-based-cranial-skull-implant-modelling-and-structural-analysis-unit-cell-algorithm-meshless-approach
#5
V Phanindra Bogu, Y Ravi Kumar, Asit Kumar Khanra
This computational study explores a unique modelling approach of the cranial implant, homogenous scaffold algorithm and meshless method, respectively. This meshless method is employed to review the implant underneath intracranial pressure (ICP) conditions with a standard ICP range of 7 mm of Hg to 15 mm of Hg. The algorithm is used to introduce uniform porosity within the implant enabling the implant behaviour with respect to ICP conditions. However, increase in the porosity leads to variation in deformation and equivalent stress, respectively...
May 5, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28447387/who-has-dibs-on-a-dead-rhinoceros-beetle
#6
Robin M Giblin-Davis
No abstract text is available yet for this article.
April 26, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28441468/histological-study-of-white-rhinoceros-integument
#7
Jeffrey H Plochocki, Saul Ruiz, José R Rodriguez-Sosa, Margaret I Hall
In this study, we report findings from a microscopic analysis of the white rhinoceros (Ceratotherium simum) integumentary ultrastructure. Skin samples from the cheek, shoulder, flank and rump were taken from a 46-year-old female southern white rhinoceros and examined using H&E and elastic histological stains. The epidermis was thickest in the flank (1.003 mm) followed by the rump, cheek and shoulder. The stratum corneum comprised more than half the epidermal thickness. Numerous melanin granules were found in the basal and spinosum layers...
2017: PloS One
https://www.readbyqxmd.com/read/28419525/method-comparison-and-generation-of-plasma-biochemistry-ris-for-the-white-rhinoceros-on-a-point-of-care-and-wet-chemistry-analyzer
#8
Emma H Hooijberg, Gerhard Steenkamp, Peter Buss, Amelia Goddard
BACKGROUND: Plasma biochemistry analysis may aid the management of White rhinoceros with poaching or other injuries. Analyzer- and species-specific RIs are necessary to evaluate health status and identify abnormalities. OBJECTIVES: The purpose of the study was to perform a comparison study between the IDEXX VetTest and Roche Cobas Integra 400 Plus, and to generate analyzer-specific RIs for White rhinoceros according to published guidelines. METHODS: Comparison was carried out using White rhinoceros plasma samples from healthy and diseased animals...
June 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28330916/climate-warming-and-humans-played-different-roles-in-triggering-late-quaternary-extinctions-in-east-and-west-eurasia
#9
Xinru Wan, Zhibin Zhang
Climate change and humans are proposed as the two key drivers of total extinction of many large mammals in the Late Pleistocene and Early Holocene, but disentangling their relative roles remains challenging owing to a lack of quantitative evaluation of human impact and climate-driven distribution changes on the extinctions of these large mammals in a continuous temporal-spatial dimension. Here, our analyses showed that temperature change had significant effects on mammoth (genus Mammuthus), rhinoceros (Rhinocerotidae), horse (Equidae) and deer (Cervidae)...
March 29, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28316883/middle-pleistocene-protein-sequences-from-the-rhinoceros-genus-stephanorhinus-and-the-phylogeny-of-extant-and-extinct-middle-late-pleistocene-rhinocerotidae
#10
Frido Welker, Geoff M Smith, Jarod M Hutson, Lutz Kindler, Alejandro Garcia-Moreno, Aritza Villaluenga, Elaine Turner, Sabine Gaudzinski-Windheuser
BACKGROUND: Ancient protein sequences are increasingly used to elucidate the phylogenetic relationships between extinct and extant mammalian taxa. Here, we apply these recent developments to Middle Pleistocene bone specimens of the rhinoceros genus Stephanorhinus. No biomolecular sequence data is currently available for this genus, leaving phylogenetic hypotheses on its evolutionary relationships to extant and extinct rhinoceroses untested. Furthermore, recent phylogenies based on Rhinocerotidae (partial or complete) mitochondrial DNA sequences differ in the placement of the Sumatran rhinoceros (Dicerorhinus sumatrensis)...
2017: PeerJ
https://www.readbyqxmd.com/read/28281770/tremors-in-white-rhinoceroses-i-ceratotherium-simum-i-during-etorphine-azaperone-immobilisation
#11
Stephanie S De Lange, Andrea Fuller, Anna Haw, Markus Hofmeyr, Peter Buss, Michele Miller, Leith C R Meyer
Little is known about the mechanisms causing tremors during immobilisation of rhinoceros and whether cardiorespiratory supportive interventions alter their intensity. Therefore, we set out to determine the possible mechanisms that lead to muscle tremors and ascertain whether cardiorespiratory supportive interventions affect tremor intensity. We studied tremors and physiological responses during etorphine-azaperone immobilisation in eight boma-held and 14 free-living white rhinoceroses. Repeated measures analysis of variance and a Friedman test were used to determine differences in variables over time and between interventions...
February 24, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28273061/neanderthal-behaviour-diet-and-disease-inferred-from-ancient-dna-in-dental-calculus
#12
Laura S Weyrich, Sebastian Duchene, Julien Soubrier, Luis Arriola, Bastien Llamas, James Breen, Alan G Morris, Kurt W Alt, David Caramelli, Veit Dresely, Milly Farrell, Andrew G Farrer, Michael Francken, Neville Gully, Wolfgang Haak, Karen Hardy, Katerina Harvati, Petra Held, Edward C Holmes, John Kaidonis, Carles Lalueza-Fox, Marco de la Rasilla, Antonio Rosas, Patrick Semal, Arkadiusz Soltysiak, Grant Townsend, Donatella Usai, Joachim Wahl, Daniel H Huson, Keith Dobney, Alan Cooper
Recent genomic data have revealed multiple interactions between Neanderthals and modern humans, but there is currently little genetic evidence regarding Neanderthal behaviour, diet, or disease. Here we describe the shotgun-sequencing of ancient DNA from five specimens of Neanderthal calcified dental plaque (calculus) and the characterization of regional differences in Neanderthal ecology. At Spy cave, Belgium, Neanderthal diet was heavily meat based and included woolly rhinoceros and wild sheep (mouflon), characteristic of a steppe environment...
April 20, 2017: Nature
https://www.readbyqxmd.com/read/28270249/errors-on-the-moca-s-animal-naming-findings-from-parkinson-s-disease-patients
#13
Yassar Alamri, Tim Anderson, John Dalrymple-Alford, Michael Macaskill
We read the findings by Cecato et al. (2016) with great interest. In their study, naming the rhinoceros discriminated between patients with amnestic mild cognitive impairment (aMCI) and Alzheimer's disease (AD) but not healthy controls (HC). Of note, HC participants were significantly younger than aMCI and AD patients. All participants were administered the original version of the Montreal Cognitive Assessment (MoCA) instrument.
March 8, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28229336/relevant-principal-factors-affecting-the-reproducibility-of-insect-primary-culture
#14
Norichika Ogata, Kikuo Iwabuchi
The primary culture of insect cells often suffers from problems with poor reproducibility in the quality of the final cell preparations. The cellular composition of the explants (cell number and cell types), surgical methods (surgical duration and surgical isolation), and physiological and genetic differences between donors may be critical factors affecting the reproducibility of culture. However, little is known about where biological variation (interindividual differences between donors) ends and technical variation (variance in replication of culture conditions) begins...
February 22, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28221132/mycobacterium-bovis-in-a-free-ranging-black-rhinoceros-kruger-national-park-south-africa-2016
#15
Michele A Miller, Peter E Buss, Paul D van Helden, Sven D C Parsons
In 2016, an emaciated black rhinoceros (Diceros bicornis) was found in Kruger National Park, South Africa. An interferon-γ response was detected against mycobacterial antigens, and lung tissue was positive for Mycobacterium bovis. This case highlights the risk that tuberculosis presents to rhinoceros in M. bovis-endemic areas.
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28198090/succession-and-dynamics-of-pristionchus-nematodes-and-their-microbiome-during-decomposition-of-oryctes-borbonicus-on-la-r%C3%A3-union-island
#16
Jan M Meyer, Praveen Baskaran, Christian Quast, Vladislav Susoy, Christian Rödelsperger, Frank O Glöckner, Ralf J Sommer
Insects and nematodes represent the most species-rich animal taxa and they occur together in a variety of associations. Necromenic nematodes of the genus Pristionchus are found on scarab beetles with more than 30 species known from worldwide samplings. However, little is known about the dynamics and succession of nematodes and bacteria during the decomposition of beetle carcasses. Here, we study nematode and bacterial succession of the decomposing rhinoceros beetle Oryctes borbonicus on La Réunion Island. We show that Pristionchus pacificus exits the arrested dauer stage seven days after the beetles´ deaths...
February 15, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28177084/judas-beetles-discovering-cryptic-breeding-sites-by-radio-tracking-coconut-rhinoceros-beetles-oryctes-rhinoceros-coleoptera-scarabaeidae
#17
Aubrey Moore, Diego C Barahona, Katherine A Lehman, Dominick D Skabeikis, Ian R Iriarte, Eric B Jang, Matthew S Siderhurst
No abstract text is available yet for this article.
February 1, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28176810/extinctions-genetic-erosion-and-conservation-options-for-the-black-rhinoceros-diceros-bicornis
#18
Yoshan Moodley, Isa-Rita M Russo, Desiré L Dalton, Antoinette Kotzé, Shadrack Muya, Patricia Haubensak, Boglárka Bálint, Gopi K Munimanda, Caroline Deimel, Andrea Setzer, Kara Dicks, Barbara Herzig-Straschil, Daniela C Kalthoff, Hans R Siegismund, Jan Robovský, Paul O'Donoghue, Michael W Bruford
The black rhinoceros is again on the verge of extinction due to unsustainable poaching in its native range. Despite a wide historic distribution, the black rhinoceros was traditionally thought of as depauperate in genetic variation, and with very little known about its evolutionary history. This knowledge gap has hampered conservation efforts because hunting has dramatically reduced the species' once continuous distribution, leaving five surviving gene pools of unknown genetic affinity. Here we examined the range-wide genetic structure of historic and modern populations using the largest and most geographically representative sample of black rhinoceroses ever assembled...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28170027/snp-discovery-and-characterisation-in-white-rhino-ceratotherium-simum-with-application-to-parentage-assignment
#19
Christiaan Labuschagne, Desiré L Dalton, J Paul Grobler, Antoinette Kotzé
The white rhino is one of the great success stories of modern wildlife conservation, growing from as few as 50-100 animals in the 1880s, to approximately 20,000 white rhinoceros remaining today. However, illegal trade in conservational rhinoceros horns is adding constant pressure on remaining populations. Captive management of ex situ populations of endangered species using molecular methods can contribute to improving the management of the species. Here we compare for the first time the utility of 33 Single Nucleotide Polymorphisms (SNPs) and nine microsatellites (MS) in isolation and in combination for assigning parentage in captive White Rhinoceros...
January 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28155294/pulmonary-gas-exchange-and-acid-base-status-during-immobilisation-of-black-rhinoceroses-i-diceros-bicornis-i-in-zimbabwe
#20
Åsa Fahlman, Anna Edner, Sandra Wenger, Chris Foggin, Görel Nyman
When immobilising wildlife, adverse side effects can include hypoxaemia, acidosis and hypertension. Pulmonary gas exchange and acid-base status were evaluated during immobilisation of 25 free-ranging and one boma-held black rhinoceros (Diceros bicornis) in Zimbabwe. The effect of different body positions on arterial oxygenation was evaluated. A combination of the following drugs was used: an opioid (etorphine or thiafentanil), azaperone and an a2 -adrenoceptor agonist (detomidine or xylazine). Respiratory and heart rates, rectal temperature and pulse oximetry-derived haemoglobin oxygen saturation were recorded...
December 2, 2016: Journal of the South African Veterinary Association
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