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https://www.readbyqxmd.com/read/29778077/selection-of-plants-for-phytoremediation-of-barium-polluted-flooded-soils
#1
Paulo Roberto Cleyton de Castro Ribeiro, Douglas Gomes Viana, Fábio Ribeiro Pires, Fernando Barboza Egreja Filho, Robson Bonomo, Alberto Cargnelutti Filho, Luiz Fernando Martins, Leila Beatriz Silva Cruz, Mauro César Pinto Nascimento
The use of barite (BaSO4) in drilling fluids for oil and gas activities makes barium a potential contaminant in case of spills onto flooded soils, where low redox conditions may increase barium sulfate solubility. In order to select plants able to remove barium in such scenarios, the following species were evaluated on barium phytoextraction capacity: Brachiaria arrecta, Cyperus papyrus, Eleocharis acutangula, E. interstincta, Nephrolepsis cf. rivularis, Oryza sativa IRGA 424, O. sativa BRS Tropical, Paspalum conspersum, and Typha domingensis...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29775148/the-pterygoclival-ligament-a-novel-landmark-for-localization-of-the-internal-carotid-artery-during-the-endoscopic-endonasal-approach
#2
Ali Tayebi Meybodi, Andrew S Little, Vera Vigo, Arnau Benet, Sofia Kakaizada, Michael T Lawton
OBJECTIVE The transpterygoid extension of the endoscopic endonasal approach provides exposure of the petrous apex, Meckel's cave, paraclival area, and the infratemporal fossa. Safe and efficient localization of the lacerum segment of the internal carotid artery (ICA) is a crucial part of such exposure. The aim of this study is to introduce a novel landmark for localization of the lacerum ICA. METHODS Ten cadaveric heads were prepared for transnasal endoscopic dissection. The floor of the sphenoid sinus was drilled to expose an extension of the pharyngobasilar fascia between the sphenoid floor and the pterygoid process (the pterygoclival ligament)...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29773722/drilling-threatens-ancient-chaco-landscape
#3
April Reese
No abstract text is available yet for this article.
May 18, 2018: Science
https://www.readbyqxmd.com/read/29772986/comparing-the-effect-of-preparation-of-the-implant-sites-with-piezosurgery-and-conventional-drilling-on-the-stability-of-implants-at-5-months-follow-up
#4
Sara Soheilifar, Mohsen Bidgoli, Ehsan Houshyar, Maryam Farhadian, Ali Ghamari
The objective of this study was to compare the effects of preparing for implant site osteotomy with conventional drilling or piezosurgery on the stability of oral implants after a 5 month follow-up period. Thirty patients participated in this randomized clinical trial and received two implants in posterior mandible in bone of the same quality. All surgical procedures were performed by the same surgeon. Implant stability amounts were measured by resonance frequency analysis using the Osstell Mentor device and are reported in the format of implant stability quotient (ISQ) values at baseline and 90 and 150 days after surgery...
2018: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/29771042/-alarming-system-in-real-time-and-high-quality-display-using-volumerendering-for-otologic-surgical-navigation-a-preclinical-study
#5
W Y Zhang, G D Feng, S Q Chen, Q W Huang, Z Q Gao
Objective: The aim of this study is to design and develop a novel navigation framework that alarms the surgeon with sound during drilling and dynamically renders the high quality medical image data. Method: The accuracy of the proposed system were measured with a skull model using paired point registration and the target registration error (TRE) was computed. We segmented the accurate structure of target and compute the minimum distance between the drill tip and the target. Once the drill tip approached the target structures, the system would alarm the surgeon...
May 20, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29770562/evaluation-of-dental-implant-stability-in-bone-phantoms-comparison-between-a-quantitative-ultrasound-technique-and-resonance-frequency-analysis
#6
Romain Vayron, Vu-Hieu Nguyen, Benoît Lecuelle, Guillaume Haiat
BACKGROUND: Resonance frequency analyses and quantitative ultrasound methods have been suggested to assess dental implant primary stability. PURPOSE: The purpose of this study was to compare the results obtained using these two techniques applied to the same dental implants inserted in various bone phantoms. MATERIALS AND METHODS: Different values of trabecular bone density and cortical thickness were considered to assess the effect of bone quality on the respective indicators (UI and ISQ)...
May 16, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29770286/resection-of-an-optic-canal-meningioma-through-a-contralateral-subfrontal-approach-with-endoscopic-assistance-a-2d-operative-video
#7
Moujahed Labidi, Kentaro Watanabe, Anne-Laure Bernat, Shunya Hanakita, Sébastien Froelich
Objective  To review the use of the contralateral subfrontal approach for the resection of an optic canal meningioma. Design  Operative video. Results  A meningioma, located in the inferomedial side of the optic canal ( Fig. 1 ), was found to cause significant visual deterioration. The subfrontal route was preferred to expose the tumor without mobilization of the optic nerve. Drilling of the anterior limb of the chiasmatic sulcus (limbus sphenoidale) provided adequate exposure of the medial aspect of the optic canal...
February 2018: Journal of Neurological Surgery. Part B, Skull Base
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
#8
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/29767213/teaching-medical-educators-how-to-teach-communication-skills-more-than-a-decade-of-experience
#9
Carla L Spagnoletti, Sarah Merriam, Laurel Milberg, William I Cohen, Robert M Arnold
OBJECTIVES: Although opportunities exist for medical educators to gain additional training in teaching, literature that describes how to teach educators to teach communication skills to trainees is limited. The authors developed and evaluated a faculty development course that uses didactics, demonstration, drills, and role-play in a small-group format. METHODS: The course has been offered through the Institute for Clinical Research Education at the University of Pittsburgh for almost 15 years...
May 2018: Southern Medical Journal
https://www.readbyqxmd.com/read/29765263/first-observations-of-the-bigfin-squid-magnapinna-sp-in-the-colombian-southern-caribbean
#10
Jurgen Guerrero-Kommritz, Jaime Cantera, Vladimir Puentes, Jorge Leon
Herein, first observations are reported of Magnapinna squids in the Colombian Southern Caribbean. Two specimens were observed by Remote Operated Vehicles (ROV) during exploratory drilling surveys for hydrocarbons at 1,883 and 2,294 m depth. These are the first observations of specimens of Magnapinna in the Southern Caribbean. Resumen La primera observación del calamar Magnapinna sp. en el caribe sur colombiano. Dos especímenes de calamares de aleta grande fueron observados con submarino de operación remota (ROV) durante un proyecto de perforación exploratoria de hidrocaburos a profundidades de 1,883 y de 2,294 m, respectivamente...
2018: Biodiversity Data Journal
https://www.readbyqxmd.com/read/29763506/simplifying-zygomatic-implant-site-preparation-using-ultrasonic-navigation-a-technical-note
#11
Gerardo Pellegrino, Achille Tarsitano, Valerio Taraschi, Tomaso Vercellotti, Claudio Marchetti
Zygomatic implant site preparation could be considered a challenging procedure because of the use of a very long twist drill that could sometimes be difficult to control due to the need for drilling the malar bone on an oblique surface. Ultrasound was recently suggested to achieve better control, but the specific long tips required are not readily available, and the elongated tip also tends to reduce the efficacy. This technical note describes a proposal of a novel computer-aided technique to simplify the procedure of zygomatic implant site preparation...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29763502/thermal-changes-during-guided-flapless-implant-site-preparation-a-comparative-study
#12
Gianpaolo Sannino, Enrico F Gherlone
PURPOSE: To compare intrabony thermal changes induced by two different protocols for guided implant surgery during the whole drilling procedure. MATERIALS AND METHODS: Two protocols for guided implant placement were evaluated in vitro using artificial bone cylinders. The control protocol provided traditional metal sleeves and a standard drilling sequence composed of four cylindrical triflute drills (cutting surface length = 16 mm). The test protocol provided a three-slot polyurethane sleeve and two cylindrical drills (second drill cutting surface length = 4 mm)...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29762185/intraosseous-heat-generation-during-osteotomy-performed-freehand-and-through-template-with-an-integrated-metal-guide-sleeve-an-in-vitro-study
#13
Ibrahim Barrak, Árpád Joób-Fancsaly, Gábor Braunitzer, Endre Varga, Kristóf Boa, József Piffkó
OBJECTIVE: To investigate drill wear and consequent intraosseous temperature elevation during freehand and guided bone drilling, with attention to the effect of metal-on-metal contact during guided drilling. MATERIALS AND METHODS: Osteotomies were performed on bovine ribs, with 2.0 mm diameter stainless steel drill bits of the SMART Guide System, under 3 sterilization protocols, at 800, 1200, 1500, and 2000 rpm. Sterilization was performed after every 3 drilling...
May 14, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29762184/histomorphometric-comparison-of-3-osteotomy-techniques
#14
Frederic B Slete, Paul Olin, Hari Prasad
PURPOSE: This pilot study compares the histomorphometric structure of osteotomy preparation through standard extraction drilling (SD), Summers osteotomes (SO), and a new method of nonextraction drilling called osseodensification (OD). METHOD AND MATERIALS: Fresh porcine tibia plateau was used as the surgical specimen. Three preparation methods (N = 6 for each) were used to prepare 18 osteotomies according to manufacturer protocols. Eighteen tapered screw-vent (4...
May 14, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29761748/transfemoral-amputation-adductor-myodesis-using-fibertape-and-knotless-anchors
#15
Andrew R Hsu
Transfemoral amputation is considered the last treatment option for severe infection, vascular disease, trauma, and malignant tumors of the lower extremity that have failed limb salvage. Unopposed pull of the hip abductors causes a flexion-abduction thigh deformity that results in abnormal biomechanics and increased oxygen consumption during ambulation. Myodesis of the adductor tendons is a critical component of transfemoral amputation that creates dynamic muscle balance, enhances prosthetic fitting and function, and improves clinical outcomes...
May 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29759935/applied-anatomy-of-round-window-and-adjacent-structures-of-tympanum-related-to-cochlear-implantation
#16
Shraddha Jain, Sagar Gaurkar, Prasad T Deshmukh, Mohnish Khatri, Sanika Kalambe, Pooja Lakhotia, Deepshikha Chandravanshi, Ashish Disawal
INTRODUCTION: Various aspects of the round window anatomy and anatomy of posterior tympanum have relevant implications for designing cochlear implant electrodes and visualizing the round window through facial recess. Preoperative information about possible anatomical variations of the round window and its relationships to the adjacent neurovascular structures can help reduce complications in cochlear implant surgery. OBJECTIVE: The present study was undertaken to assess the common variations in round window anatomy and the relationships to structures of the tympanum that may be relevant for cochlear implant surgery...
April 19, 2018: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29756501/unrecoverable-bi-products-of-drilling-titanium-alloy-and-tantalum-metal-implants-a-pilot-study
#17
Paweł Skowronek, Paweł Olszewski, Wojciech Święszkowski, Marek Synder, Marcin Sibiński, Jacek Mazek
BACKGROUND: Trabecular metal implants with a porous architecture that allows for the incorporation of bone into the implant during healing are gaining popularity in alloplastic revision procedures. The bi-products of drilling titanium alloy (Ti) and tantalum (Ta) implants have not been previously assessed. METHODS: Four holes were drilled in each of two spatially porous trabecular implants, one Ta and the other Ti alloy (Ti-6Al-7Nb), for this pilot in vitro study...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29755965/the-development-of-long-term-adverse-health-effects-in-oil-spill-cleanup-workers-of-the-deepwater-horizon-offshore-drilling-rig-disaster
#18
Mark A D'Andrea, G Kesava Reddy
Background: The purpose of this study was to assess the long-term adverse health effects of the 2010 Deepwater Horizon Gulf oil spill exposure in workers who participated in its cleanup work. Methods: Medical charts of both the oil spill exposed and unexposed subjects were reviewed. The changes in the white blood cells, platelets, hemoglobin, hematocrit, blood urea nitrogen, creatinine, alkaline phosphatase (ALP), aspartate amino transferase (AST), alanine amino transferase (ALT) levels, as well as their pulmonary and cardiac functions were evaluated...
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29755840/treatment-of-mallet-finger-deformity-with-a-modified-palmaris-longus-tendon-graft-through-a-bone-tunnel
#19
Zengbing Liu, Kai Ma, Dong Huang
OBJECTIVE: To investigate the clinical effect of treating mallet finger deformity using a modified palmaris longus tendon graft through a bone tunnel. METHODS: Altogether, 21 patients with mallet finger deformity (16 men, 5 women; average age 31 years, range 19-47 years) were treated with a modified palmaris longus tendon graft through a bone tunnel during 18 months (2014-2016). Four index fingers, seven middle fingers, eight ring fingers, and two little fingers were treated for four cutting injuries, eleven finger sprains, four crush injuries, and two twist injuries (7 open and 14 closed injuries)...
2018: International Journal of Burns and Trauma
https://www.readbyqxmd.com/read/29754095/linking-otolith-microchemistry-and-surface-water-contamination-from-natural-gas-mining
#20
David H Keller, Paula M Zelanko, Joel E Gagnon, Richard J Horwitz, Heather S Galbraith, David J Velinsky
Unconventional natural gas drilling and the use of hydraulic fracturing technology have expanded rapidly in North America. This expansion has raised concerns of surface water contamination by way of spills and leaks, which may be sporadic, small, and therefore difficult to detect. Here we explore the use of otolith microchemistry as a tool for monitoring surface water contamination from generated waters (GW) of unconventional natural gas drilling. We exposed Brook Trout in the laboratory to three volumetric concentrations of surrogate generated water (SGW) representing GW on day five of drilling...
May 10, 2018: Environmental Pollution
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