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https://www.readbyqxmd.com/read/28539700/hydrothermal-oxidation-of-fecal-sludge-experimental-investigations-and-kinetic-modeling
#1
Tobias Hübner, Markus Roth, Frédéric Vogel
Hydrothermal oxidation (HTO) provides an efficient technique to completely destroy wet organic wastes. In this study, HTO was applied to treat fecal sludge at well-defined experimental conditions. Four different kinetic models were adjusted to the obtained data. Among others, a distributed activation energy model (DAEM) was applied. A total of 33 experiments were carried out in an unstirred batch reactor with pressurized air as the oxidant at temperatures of <470 °C, oxygen-to-fuel equivalence ratios between 0 and 1...
November 23, 2016: Industrial & Engineering Chemistry Research
https://www.readbyqxmd.com/read/28494285/effects-of-in-situ-exposure-to-tritiated-natural-environments-a-multi-biomarker-approach-using-the-fathead-minnow-pimephales-promelas
#2
B Gagnaire, C Adam-Guillermin, A Festarini, I Cavalié, C Della-Vedova, C Shultz, S B Kim, H Ikert, C Dubois, S Walsh, F Farrow, D Beaton, E Tan, K Wen, M Stuart
Aquatic ecosystems are chronically exposed to radionuclides as well as other pollutants. Increased concentrations of pollutants in aquatic environments can present a risk to exposed organisms, including fish. The goal of this study was to characterize the effects of tritium, in the context of natural environments, on the health of fathead minnow, Pimephales promelas. Fish were exposed to tritium (activity concentrations ranging from 2 to 23,000Bq/L) and also to various concentrations of several metals to replicate multiple-stressor environments...
May 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28431338/the-design-and-fabrication-of-beta-sensor-system-for-in-situ-diffusion-tests-in-mudstone-in-france
#3
Zhenhua Lin, Olivier Tillement, Marie-Genevieve Blanchin, Vivek Jindal, Agnès Vinsot, Romain V H Dagnelie, Virginie Blin, Yanick Lettry, Benoit Hautefeuille
Long term in situ diffusion experiments in the Callovian-Oxfordian mudstone (France) are designed in the context of nuclear waste management. β-emitters HTO and (36)Cl radiotracers are representative of neutral and anionic species in these experiments. Studies have been carried out to design an in situ beta monitoring system in order to quantify tracer migration in the rock pore water over time. The development, design and calibration of β-emitter radiation sensors were performed. An optimised geometry was calculated for the detection chamber of (36)Cl in solution (Ø×L=30×2mm(2)) via Monte-Carlo N-Particle transport simulation tools...
April 1, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28417183/patella-height-is-not-altered-by-descending-medial-open-wedge-high-tibial-osteotomy-hto-compared-to-ascending-hto
#4
Matthias Krause, Tobias Claus Drenck, Alexander Korthaus, Achim Preiss, Karl-Heinz Frosch, Ralph Akoto
PURPOSE: The primary purpose of the study was to gain insight into geometric changes of the patellar height (PH) and posterior tibial slope (PTS) after a biplanar ascending medial open-wedge high tibial osteotomy (HTO) compared to biplanar descending medial open-wedge HTO in patients with genu varum. METHODS: Sixty-four patients (mean age 45.2 ± 8.7 years, females n = 24, males n = 40) with varus malalignment and medial gonarthrosis were retrospectively studied...
April 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28416679/sensorimotor-independent-development-of-hands-and-tools-selectivity-in-the-visual-cortex
#5
Ella Striem-Amit, Gilles Vannuscorps, Alfonso Caramazza
The visual occipito-temporal cortex is composed of several distinct regions specialized in the identification of different object kinds such as tools and bodies. Its organization appears to reflect not only the visual characteristics of the inputs but also the behavior that can be achieved with them. For example, there are spatially overlapping responses for viewing hands and tools, which is likely due to their common role in object-directed actions. How dependent is occipito-temporal cortex organization on object manipulation and motor experience? To investigate this question, we studied five individuals born without hands (individuals with upper limb dysplasia), who use tools with their feet...
May 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28396901/-%C3%A2-biomechanics-of-new-implants-for-hto
#6
D Pape, A Diffo Kaze, A Hoffmann, S Maas
Biomechanical characteristics of 5 tibial osteotomy plates for the treatment of medial knee joint osteoarthritis were examined. Fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy, using TomoFix™ standard, PEEKPower®, ContourLock®, TomoFix™ small stature plates, and iBalance® implants. Static compression load to failure and load-controlled cyclic fatigue failure tests were performed. All plates had sufficient stability up to 2400 N in the static compression load to failure tests...
April 10, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28389878/the-effects-of-different-hinge-positions-on-posterior-tibial-slope-in-medial-open-wedge-high-tibial-osteotomy
#7
Ho-Seung Jo, Jin-Sung Park, June-Ho Byun, Young-Bok Lee, Young-Lac Choi, Seong-Hee Cho, Dong-Kyu Moon, Sang-Hyuk Lee, Sun-Chul Hwang
PURPOSE: The purpose of this study was to determine the standard hinge position to minimize effects from medial open-wedge high tibial osteotomy (HTO) on the posterior tibial slope. METHODS: Sixteen cadaveric knees underwent medial open-wedge osteotomy using either the standard or the low hinge position. To define the standard hinge position, a line 3 cm inferior to the medial tibial plateau towards the fibular head and located its intersection with a longitudinal line 1 cm medial to the fibular shaft was drawn...
April 7, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28364351/-prevention-of-lateral-cortex-fractures-in-open-wedge-high-tibial-osteotomies-the-anteroposterior-drill-hole-approach
#8
G Reyle, O Lorbach, A Diffo Kaze, A Hoffmann, D Pape
BACKGROUND: In osteotomies with larger correction angles, the capacity for elastic deformation is frequently exceeded, resulting in plastic deformation and fracture of the opposite cortex, which may lead to subsequent loss of correction. An anteroposterior drill hole at the apex of the horizontal osteotomy (= hinge) is supposed to increase the capacity of the bony hinge for elastic deformation and ideally to prevent fractures of the opposite cortex. MATERIALS AND METHODS: A high tibial osteotomy (HTO) using standard surgical technique was performed in 20 each of Synbones, Sawbones, and human cadaver tibial specimens...
March 31, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28361191/-bone-void-fillers-in-osteotomies-if-when-and-which-type
#9
A Kröll, F F Schiaparelli, C de Simoni, O Slevin, M T Hirschmann
Medial opening wedge high tibial osteotomy (HTO) is an established procedure for treating medial osteoarthritis of the knee. In order to achieve the desired amount of correction, the osteotomy gap is opened, which creates a bone void in the medial aspect of the proximal tibia. The resulting bone void can either be left alone or be addressed by interposing a variety of different bone void fillers. Autologous and allogenic fillers can be distinguished from synthetic materials. Up to now, few studies have dealt with the usefulness and necessity for bone void fillers in HTO...
March 30, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28355682/efficacy-of-tranexamic-acid-for-hemostasis-in-patients-undergoing-high-tibial-osteotomy
#10
Dong Won Suh, Bong Soo Kyung, Seung-Beom Han, Kuhoang Cheong, Won Hee Lee
Extensive bone bleeding and an uncomfortable hematoma can develop due to the opening gap and space during a medial open high tibial osteotomy (HTO). Tranexamic acid (TXA) has been used in various orthopaedic surgeries to reduce bleeding and wound complications. However, no study has investigated the effect of TXA during HTO. Therefore, the purpose of this study is to evaluate the efficacy of TXA in reducing postoperative blood loss in patients undergoing HTO. The hypothesis is that topical TXA administration will reduce postoperative bleeding in patients undergoing medial opening HTO...
March 29, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28351371/unicompartmental-knee-arthroplasty-is-it-superior-to-high-tibial-osteotomy-in-treating-unicompartmental-osteoarthritis-a-meta-analysis-and-systemic-review
#11
Marcel Budhi Santoso, Lidong Wu
BACKGROUND: Debate remains whether high tibial osteotomy (HTO) or unicompartmental knee arthroplasty (UKA) is more beneficial for the treatment of unicompartmental knee osteoarthritis. The purpose of this study was to compare the functional results, knee scores, activity levels, and complications between the two procedures. METHODS: We performed a systematic review of published literature from August 1982 through January 2017. Fifteen papers reporting three prospective randomized trials were subjected to a meta-analysis...
March 28, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28350697/tritium-3-h-retention-in-mice-administered-as-hto-dto-or-as-3-h-labeled-amino-acids
#12
Nicholas D Priest, Melinda S J Blimkie, Heather Wyatt, Michelle Bugden, Laura A Bannister, Yann Gueguen, Jean-Rene Jourdain, Dmitry Klokov
The objective of this study was to compare the biokinetics of injected H-labeled light (HTO) and heavy (DTO) water in CBA/CaJ mice and to compare the organ distribution and/or body content of H administered by chronic ingestion for 1 mo to C57Bl/6J mice, as either H-labeled water or H-labeled amino acids (glycine, alanine and proline). HTO and DTO were administered to CBA/CaJ mice by single intraperitoneal injection and body retention was determined for up to 384 h post-injection. Tritium-labeled water or H-labeled amino acids were given to C57Bl/6J mice ad libitum for 30 d in drinking water...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350023/topochemical-synthesis-and-photocatalytic-activity-of-3d-hierarchical-batio3-microspheres-constructed-from-crystal-axis-oriented-nanosheets
#13
Chang-Ke Chen, Shi-Xi Zhao, Qian-Long Lu, Kai Luo, Xi-Hui Zhang, Ce-Wen Nan
Novel BaTiO3 hierarchical porous microspheres were achieved by using H2Ti2O5·H2O (HTO) hierarchical microspheres as a precursor template via a facile solvothermal method. Interestingly, the BaTiO3 microspheres were constructed with two-dimensional (2D) nanosheets, which were composed of many order nanocrystals with crystal-axis-orientation. The special hierarchical structure, which is both macroporous and mesoporous, exhibits a large specific surface area and a high total pore volume. The photocatalytic performance of BaTiO3 hierarchical microspheres for degradation of methyl orange (MO) under UV-light irradiation was tested, its apparent rate being up to 0...
April 11, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28331119/estimation-of-biological-effects-of-tritium
#14
Toshiyuki Umata
Nuclear fusion technology is expected to create new energy in the future. However, nuclear fusion requires a large amount of tritium as a fuel, leading to concern about the exposure of radiation workers to tritium beta radiation. Furthermore, countermeasures for tritium-polluted water produced in decommissioning of the reactor at Fukushima Daiichi Nuclear Power Station may potentially cause health problems in radiation workers. Although, internal exposure to tritium at a low dose/low dose rate can be assumed, biological effect of tritium exposure is not negligible, because tritiated water (HTO) intake to the body via the mouth/inhalation/skin would lead to homogeneous distribution throughout the whole body...
2017: Journal of UOEH
https://www.readbyqxmd.com/read/28326399/total-knee-replacement-for-tricompartmental-arthritis-in-a-patient-with-a-below-knee-amputation-after-a-previous-closing-wedge-high-tibial-osteotomy
#15
Mark A Fleming, Michael C Dixon
This is a report of a 64-year-old man who had undergone a high tibial osteotomy (HTO) 17 years ago of his right knee for medial compartment osteoarthritis; 5 days later, he received a below-knee amputation owing to a missed popliteal artery injury at the time of the HTO. We elected to perform a total knee replacement (TKR) for progressive arthritis of the ipsilateral knee 17 years after the transtibial amputation. Although there is a plethora of literature regarding TKR in the contralateral knee of amputees, there is a paucity of data of TKR in the ipsilateral knee...
June 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28324204/tibial-nerve-neuropathy-following-medial-opening-wedge-high-tibial-osteotomy-case-report-of-a-rare-technical-complication
#16
Young-Soo Shin, Hyun-Bo Sim, Jung-Ro Yoon
A 63-year-old woman developed tibial nerve injury caused by an overlong K wire and 4.5-mm cortical lag screw through the first distal hole below the osteotomy during medial opening-wedge high tibial osteotomy (HTO), leading to a lack of sensation on the sole of the foot with no disturbances in motor functions. The temporary lag screw in the first distal hole below the osteotomy is often inserted by an excessive length in order to compress the potentially fractured opposite cortex. By doing so, posterior neurovascular structures including the tibial nerve and the popliteal vessels can be injured...
March 21, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28302132/long-term-results-and-comparison-of-the-three-different-high-tibial-osteotomy-and-fixation-techniques-in-medial-compartment-arthrosis
#17
COMPARATIVE STUDY
Gökhan Polat, Halil İbrahim Balcı, Mehmet Fevzi Çakmak, Mehmet Demirel, Cengiz Şen, Mehmet Aşık
BACKGROUND: The purpose of this study is to report and analyze the long-term outcomes of the patients who underwent high tibial osteotomy (HTO) with three different techniques for the treatment of medial compartment arthrosis. METHODS: A total of 187 patients (195 knees) who underwent HTO between 1990 and 2010 were retrospectively evaluated. Eighty-eight knees, opening-wedge osteotomy with Puddu plate (group A); 51 knees, transverse osteotomy below the tubercle with external fixator (group B); and 29 knees, closing-wedge osteotomy with staple fixation (group C) were included in the study...
March 16, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28291955/change-of-chondral-lesions-and-predictive-factors-after-medial-open-wedge-high-tibial-osteotomy-with-a-locked-plate-system
#18
Kang-Il Kim, Min-Chul Seo, Sang-Jun Song, Dae-Kyung Bae, Duk-Hyun Kim, Sang Hak Lee
BACKGROUND: Although cartilage regeneration after medial open-wedge high tibial osteotomy (HTO) has been described, there is a paucity of reports regarding which factors influence cartilage regeneration. PURPOSE: To document whether cartilage regeneration occurs in the previously degenerated medial compartment of arthritic knees after medial open-wedge HTO without concomitant cartilage procedures and to assess which predictive factors influence regeneration after HTO...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28282221/collagen-augmentation-improves-the-quality-of-cartilage-repair-after-microfracture-in-patients-undergoing-high-tibial-osteotomy
#19
Man Soo Kim, In Jun Koh, Young Jun Choi, Kyu Hyung Pak, Yong In
BACKGROUND: The quality of cartilage repair after marrow stimulation is unpredictable. To overcome the shortcomings of the microfracture technique, various augmentation techniques have been developed. However, their efficacies remain unclear. HYPOTHESIS: The quality of cartilage repair and clinical outcomes would be superior in patients undergoing high tibial osteotomy (HTO) with microfracture and collagen augmentation compared to those undergoing HTO with microfracture alone without collagen augmentation for the treatment of medial compartment osteoarthritis (OA) of the knee...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28251263/gait-analysis-following-medial-opening-wedge-high-tibial-osteotomy
#20
Vincent Morin, Régis Pailhé, Brice Rubens Duval, Roch Mader, Jérémy Cognault, René-Christopher Rouchy, Dominique Saragaglia
PURPOSE: High tibial osteotomy (HTO) is used to treat young and active patients with knee osteoarthritis (OA) and varus deformity. The medial compartment OA alters the patients' gait. METHODS: A prospective study was carried out in 21 consecutive patients operated for HTO due to knee OA with varus deformity. There were 14 men and 7 women, with a median age of 51.9 years (38-64). Their gait was analyzed preoperatively and at 1 year postoperatively, and compared to a healthy control group...
March 1, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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