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https://www.readbyqxmd.com/read/29140644/evaluation-of-low-cost-hydrogen-sulfide-monitors-for-use-in-livestock-production
#1
Jessica M Beswick-Honn, Thomas M Peters, T Renée Anthony
Direct-reading gas monitors warn workers of the risk of potentially fatal hydrogen sulfide (H2S) exposures that may arise during manure handling. Low-cost, low-maintenance H2S monitors are available from many manufacturers, but differences in their features and performance make selection challenging for farmers. Moreover, little information is available on the practical maintenance and performance of these devices in agricultural environments. The objective of this study was to provide information to agricultural workers to aid in the selection, maintenance, and use of low-cost H2S monitors...
November 20, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29133296/comparison-of-preservation-and-transportation-protocols-for-preloaded-descemet-membrane-endothelial-keratoplasty
#2
Vito Romano, Mohit Parekh, Alessandro Ruzza, Colin E Willoughby, Stefano Ferrari, Diego Ponzin, Stephen B Kaye, Hannah J Levis
BACKGROUND/AIMS: Descemet membrane endothelial keratoplasty (DMEK) preparation is technically demanding and is a limiting factor for uptake of this kind of surgery. Supply methods that simplify the procedure for surgeons are key to increasing uptake. This study compares two different shipping protocols for DMEK. METHODS: An 8.5 mm DMEK graft was punched, marked and loaded for transportation in two different conditions: (A) endothelium trifolded inwards in organ culture conditions (n=7) and (B) endothelium rolled outwards in hypothermic conditions (n=7)...
November 13, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29111064/quantification-of-food-polysaccharide-mixtures-by-1-h-nmr
#3
Donny W H Merkx, Yvonne Westphal, Ewoud J J van Velzen, Kavish V Thakoer, Niels de Roo, John P M van Duynhoven
Polysaccharides are food ingredients that critically determine rheological properties and shelf life. A qualitative and quantitative assessment on food-specific polysaccharide mixtures by (1)H NMR is presented. The method is based on the identification of intact polysaccharides, combined with a quantitative analysis of their monosaccharide constituents. Identification of the polysaccharides is achieved by (1)H NMR line shape fitting with pure compound spectra. The monomeric composition was determined using the Saeman hydrolysis procedure, followed by direct monosaccharide quantification by (1)H NMR...
January 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29097044/standard-off-the-shelf-multibranched-thoracoabdominal-endograft-in-urgent-and-elective-patients-with-single-and-staged-procedures-in-a-multicenter-experience
#4
Roberto Silingardi, Stefano Gennai, Nicola Leone, Mauro Gargiulo, Gianluca Faggioli, Piergiorgio Cao, Fabio Verzini, Arnaldo Ippoliti, Nicola Tusini, Carmelo Ricci, Michele Antonello, Roberto Chiesa, Enrico Maria Marone, Nicola Mangialardi, Francesco Speziale, Gian Franco Veraldi, Stefano Bonardelli, Luigi Marcheselli
OBJECTIVE: The objective of this study was to assess immediate and midterm outcomes for urgent/emergent and elective patients with thoracoabdominal aortic aneurysms (TAAAs) treated with the first commercially available "off-the-shelf" multibranched endograft for endovascular aneurysm repair, with a single-step or a staged surgical approach. METHODS: A multicenter, nonrandomized, retrospective study was conducted of TAAA patients grouped by urgent/emergent and elective treatment with multibranched endograft for endovascular aneurysm repair at 13 Italian centers from November 2012 to August 2016...
October 31, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29093182/a-completely-biological-off-the-shelf-arteriovenous-graft-that-recellularizes-in-baboons
#5
Zeeshan H Syedain, Melanie L Graham, Ty B Dunn, Timothy O'Brien, Sandra L Johnson, Robert J Schumacher, Robert T Tranquillo
Prosthetic arteriovenous grafts (AVGs) conventionally used for hemodialysis are associated with inferior primary patency rates and increased risk of infection compared with autogenous vein grafts. We tissue-engineered an AVG grown from neonatal human dermal fibroblasts entrapped in bovine fibrin gel that is then decellularized. This graft is both "off-the-shelf" (nonliving) and completely biological. Grafts that are 6 mm in diameter and about 15 cm in length were evaluated in a baboon model of hemodialysis access in an axillary-cephalic or axillary-brachial upper arm AVG construction procedure...
November 1, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29091435/time-resolved-gravimetric-method-to-assess-degassing-of-roasted-coffee
#6
Samo Smrke, Marco Wellinger, Tomonori Suzuki, Franz Balsiger, Sebastian E W Opitz, Chahan Yeretzian
During the roasting of coffee, thermally driven chemical reactions lead to the formation of gases, of which a large fraction is carbon dioxide (CO2). Part of these gases is released during roasting while part is retained inside the porous structure of the roasted beans and is steadily released during storage or more abruptly during grinding and extraction. The release of CO2 during the various phases from roasting to consumption is linked to many important properties and characteristics of coffee. It is an indicator for freshness, plays an important role in shelf life and in packaging, impacts the extraction process, is involved in crema formation, and may affect the sensory profile in the cup...
November 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29064417/precise-gnss-positioning-using-smart-devices
#7
Eugenio Realini, Stefano Caldera, Lisa Pertusini, Daniele Sampietro
The recent access to GNSS (Global Navigation Satellite System) phase observations on smart devices, enabled by Google through its Android operating system, opens the possibility to apply precise positioning techniques using off-the-shelf, mass-market devices. The target of this work is to evaluate whether this is feasible, and which positioning accuracy can be achieved by relative positioning of the smart device with respect to a base station. Positioning of a Google/HTC Nexus 9 tablet was performed by means of batch least-squares adjustment of L1 phase double-differenced observations, using the open source goGPS software, over baselines ranging from approximately 10 m to 8 km, with respect to both physical (geodetic or low-cost) and virtual base stations...
October 24, 2017: Sensors
https://www.readbyqxmd.com/read/29057355/systematic-review-of-3d-printing-in-spinal-surgery-the-current-state-of-play
#8
REVIEW
Ben Wilcox, Ralph J Mobbs, Ai-Min Wu, Kevin Phan
Three-dimensional printing (3DP), also known as "Additive Manufacturing", is a rapidly growing industry, particularly in the area of spinal surgery. Given the complex anatomy of the spine and delicate nature of surrounding structures, 3DP has the potential to aid surgical planning and procedural accuracy. We perform a systematic review of current literature on the applications of 3DP in spinal surgery. Six electronic databases were searched for original published studies reporting cases or outcomes for 3DP surgical models, guides or implants for spinal surgery...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29053608/the-multi-parameter-wireless-sensing-system-mpwise-its-description-and-application-to-earthquake-risk-mitigation
#9
Tobias Boxberger, Kevin Fleming, Massimiliano Pittore, Stefano Parolai, Marco Pilz, Stefan Mikulla
The Multi-Parameter Wireless Sensing (MPwise) system is an innovative instrumental design that allows different sensor types to be combined with relatively high-performance computing and communications components. These units, which incorporate off-the-shelf components, can undertake complex information integration and processing tasks at the individual unit or node level (when used in a network), allowing the establishment of networks that are linked by advanced, robust and rapid communications routing and network topologies...
October 20, 2017: Sensors
https://www.readbyqxmd.com/read/29041166/exponential-fringe-pattern-projection-approach-to-gamma-independent-phase-computation-without-calibration-for-gamma-nonlinearity-in-3d-optical-metrology
#10
Ali Babaei, Mohammad Saadatseresht, Jonathan Kofman
This paper presents a method that expresses the fringe pattern as an exponential function and a mathematical model for gamma-independent phase computation. The method was compared to: (i) conventional phase measurement without nonlinearity correction, and (ii) conventional gamma correction by pattern pre-distortion based on an input-to-projector camera-output look-up table. The pre-distorted and exponential methods achieved large reduction in error compared to conventional computation with no gamma correction...
October 16, 2017: Optics Express
https://www.readbyqxmd.com/read/29027185/advanced-containment-methods-for-legg-calv%C3%A3-perthes-disease-triple-pelvic-osteotomy-versus-chiari-osteotomy
#11
Olivier Rosello, Federico Solla, Ioana Oborocianu, Edouard Chau, Tony ElHayek, Jean-Luc Clement, Virginie Rampal
INTRODUCTION: The goal of intervention in Legg-Calvé-Perthes disease (LCPD) is to prevent femoral head deformation by containing the head within the acetabulum. Currently, surgical containment methods are the mainstay of treatment, and pelvic osteotomies have been shown to be successful. They include triple pelvic osteotomy (TPO), Salter osteotomy, Chiari osteotomy and shelf procedure. The purpose of this study was to compare clinical and radiologic results for Chiari osteotomy and TPO in LCPD...
October 11, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29024837/translating-the-role-of-osteogenic-angiogenic-coupling-in-bone-formation-highly-efficient-chitosan-pdna-activated-scaffolds-can-accelerate-bone-regeneration-in-critical-sized-bone-defects
#12
Rosanne M Raftery, Irene Mencía Castaño, Gang Chen, Brenton Cavanagh, Brian Quinn, Caroline M Curtin, Sally Ann Cryan, Fergal J O'Brien
The clinical translation of bioactive scaffolds for the treatment of large segmental bone defects has remained a challenge due to safety and efficacy concerns as well as prohibitive costs. The design of an implantable, biocompatible and resorbable device, which can fill the defect space, allow for cell infiltration, differentiation and neovascularisation, while also recapitulating the natural repair process and inducing cells to lay down new bone tissue, would alleviate the problems with existing treatments...
October 4, 2017: Biomaterials
https://www.readbyqxmd.com/read/28992426/predictors-of-poor-clinical-outcome-after-arthroscopic-labral-preservation-capsular-plication-and-cam-osteoplasty-in-the-setting-of-borderline-hip-dysplasia
#13
Akihisa Hatakeyama, Hajime Utsunomiya, Shoichi Nishikino, Shiho Kanezaki, Dean K Matsuda, Akinori Sakai, Soshi Uchida
BACKGROUND: Borderline developmental dysplasia of the hip (BDDH) is frequently diagnosed concurrently with cam impingement. While hip arthroscopy has advanced the treatment of hip joint pathology, including femoroacetabular impingement (FAI), arthroscopic treatment for FAI in the setting of BDDH remains a challenge amid a subset of patients. The risk factors of poor clinical results after hip arthroscopic labral preservation and FAI corrections in the setting of BDDH patients have not been well established...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28961393/development-of-antifouling-and-bactericidal-coatings-for-platelet-storage-bags-using-dopamine-chemistry
#14
Narges Hadjesfandiari, Marie Weinhart, Jayachandran N Kizhakkedathu, Rainer Haag, Donald E Brooks
Platelets have a limited shelf life, due to the risk of bacterial contamination and platelet quality loss. Most platelet storage bags are made of a mixture of polyvinyl chloride with a plasticizer, denoted as pPVC. To improve biocompatibility of pPVC with platelets and to inhibit bacterial biofilm formation, an antifouling polymer coating is developed using mussel-inspired chemistry. A copolymer of N,N-dimethylacrylamide and N-(3-aminopropyl)methacrylamide hydrochloride is synthesized and coupled with catechol groups, named DA51-cat...
September 29, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28951198/influence-of-postmortem-treatment-with-nitric-oxide-on-the-muscle-color-and-color-stability-of-tilapia-oreochromis-niloticus-fillets
#15
Zi-Chao Wang, Yuzhen Yan, Tanzeela Nisar, Lijun Sun, Ping Su, De-Wei Chen, Yurong Guo
BACKGROUND: Nitric oxide (NO) has been recognized as pivotal for color and color stability of meat products and has an evident effect on inhibiting microbial growth in processed meat. The use of indirect NO (nitrate/nitrite) in industrial meat curing has potential deleterious effects and great concerns have been expressed over residual nitrite in meat after curing. To find a succedaneum, we have demonstrated the influence of direct NO (saturated NO solution) through euthanasia before slaughter on the fillets color of tilapia and the results suggested that direct NO treatment prior to slaughter is a good procedure to improve the color of tilapia fillets...
September 22, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28946304/edible-films-and-coatings-in-seafood-preservation-a-review
#16
REVIEW
Samira Dehghani, Seyed Vali Hosseini, Joe M Regenstein
Seafood is highly perishable and has a short shelf-life. During storage many reactions occur leading to changes in quality such as endogenous chemical and enzymatic reactions. The safety and shelf-life are related to the presence of food spoilage and pathogenic microorganisms. Despite improved manufacturing facilities and implementation of effective process control procedures such as the Hazard Analysis Critical Control Point system by seafood companies, the number of seafood-related foodborne illnesses has increased...
February 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28945302/difluoroacetic-acid-as-a-new-reagent-for-direct-c-h-difluoromethylation-of-heteroaromatic-compounds
#17
Truong Thanh Tung, Søren Brøgger Christensen, John Nielsen
A technically simple procedure for direct C-H difluoromethylation of heteroaromatic compounds using off-the-shelf difluoroacetic acid as the difluoromethylating reagent has been developed. Mono-difluoromethylation versus bis-difluoromethylation is controlled as the result of the reaction temperature. The reactions described here enable access to the late-stage C-H mono- and bis-difluoromethylation for preparation of tool compounds for chemical biology and provide access to this hitherto untapped substituent for drug discovery...
September 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28922982/porcine-mesothelium-wrapped-diced-cartilage-grafts-for-nasal-reconstruction
#18
Athanasios Bramos, David P Perrault, Alexander N Fedenko, Gene H Kim, Sofia Bougioukli, Jay R Lieberman, Jay W Calvert, Alex Wong
<b>Background:</b> Fascia wrapped diced cartilage grafts have become a useful tool in modern rhinoplasty surgery. Unfortunately, fascial harvest is associated with donor site morbidity, therefore a non-autologous alternative to fascia would be ideal. Decellularized porcine mesothelium, Meso BioMatrix<sup>TM</sup>, is an acellular scaffold that could potentially fill this need. To determine if porcine mesothelium could serve as an acceptable alternative, we histologically compared diced cartilage grafts wrapped in fascia versus porcine mesothelium...
September 19, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28892260/synthetic-poly-vinylalcohol-based-membranes-for-cartilage-surgery-and-repair
#19
Benjamin C U Tai, Chan Du, Shujun Gao, Andrew C A Wan
Cell-based therapies for cartilage repair are continually being developed to treat osteoarthritis. The cells are either introduced directly by intra-articular injection or via a cell-seeded matrix scaffold. Here, poly(vinylalcohol)-based membranes are developed to be used for mesenchymal stem cell implantation in cartilage repair procedures, having controllable physicochemical properties such as porosity, mechanical strength, and permeability, and a unique self-sealing property. The membranes possess a bilayer structure with a less porous layer providing mechanical strength and selective permeability, exhibit an elastic modulus of between 0...
September 11, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28877098/a-3-dimensional-printed-ultrasound-probe-visuospatial-trainer
#20
Ryan T McKenna, Jesse C Dove, Robert A Ratzlaff, Jose L Diaz-Gomez, Daniel J Cox, Leslie V Simon
Training adult learners to use ultrasound in clinical practice relies on the ability of the learner to apply visuospatial concepts to the anatomy of the human body. We describe a visuospatial trainer that replicates the housing of an ultrasound transducer, through which a linear laser projects light in the same plane and orientation as the ultrasonic sound waves. We use this trainer in combination with a porcine heart dissection laboratory to teach bedside cardiac ultrasound and transthoracic echocardiography (TTE)...
September 4, 2017: Ultrasound Quarterly
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