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https://www.readbyqxmd.com/read/28734218/the-evaluation-of-polycyclic-aromatic-hydrocarbons-pahs-biodegradation-kinetics-in-soil-amended-with-organic-fertilizers-and-bulking-agents
#1
Dariusz Włóka, Agnieszka Placek, Agnieszka Rorat, Marzena Smol, Małgorzata Kacprzak
The aim of this study was to investigate the polycyclic aromatic hydrocarbons (PAHs) biodegradation kinetics in soils fertilized with organic amendments (sewage sludge, compost), bulking agents (mineral sorbent, silicon dioxide in form of nano powder), and novel compositions of those materials. The scope of conducted works includes a cyclic CO2 production measurements and the determinations of PAHs content in soil samples, before and after 3-months of incubation. Obtained results show that the use of both type of organic fertilizers have a positive effect on the PAHs removal from soil...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734206/theoretical-investigation-of-the-conformational-space-of-baicalin
#2
Juan J Martínez Medina, Evelina G Ferrer, Patricia A M Williams, Nora B Okulik
Flavonoids are a large group of polyphenolic compounds ubiquitously present in plants. They are important components of human diet. They are recognized as potential drug candidates to be used in the treatment and prevention of a lot of pathological disorders, due to their protective effects. Baicalin (7-glucuronic acid 5, 6-dihydroxyflavone) is one of the main single active constituents isolated from the dried roots of Scutellaria baicalensis Georgi. The great interest on this flavonoid is due to its various pharmacological properties, such as antioxidant, antimicrobial, anti-inflammatory, anticancer and so on, and its high accumulation in the roots of S...
July 11, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734189/two-dimensional-modeling-of-elastic-wave-propagation-in-solids-containing-cracks-with-rough-surfaces-and-friction-part-i-theoretical-background
#3
Vladislav Aleshin, Steven Delrue, Andrey Trifonov, Olivier Bou Matar, Koen Van Den Abeele
Our study aims at the creation of a numerical toolbox that describes wave propagation in samples containing internal contacts (e.g. cracks, delaminations, debondings, imperfect intergranular joints) of known geometry with postulated contact interaction laws including friction. The code consists of two entities: the contact model and the solid mechanics module. Part I of the paper concerns the modeling of internal contacts (called cracks for brevity), while part II is related to the integration of the developed contact model into a solid mechanics module that allows the description of wave propagation processes...
July 13, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28734168/effect-of-neurodynamic-mobilization-on-fluid-dispersion-in-median-nerve-at-the-level-of-the-carpal-tunnel-a-cadaveric-study
#4
M Boudier-Revéret, K K Gilbert, D R Allégue, M Moussadyk, J M Brismée, P S Sizer, V Feipel, P M Dugailly, S Sobczak
OBJECTIVES: To evaluate the effect of neurodynamics mobilization (NDM) on an artificially induced edema in the median nerve at the level of the carpal tunnel in unembalmed cadavers and to assess whether NDM tensioning techniques (TT) and NDM sliding techniques (SLT) induce similar effects on intraneural fluid dispersion. DESIGN: Fourteen upper extremities of seven unembalmed cadavers were used in this study. A biomimetic solution was injected directly under the epineurium of the median nerve at the level of the proximal transverse carpal ligament...
July 17, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28734151/magnetically-recyclable-reduced-graphene-oxide-nanosheets-magnetite-palladium-aerogel-with-superior-catalytic-activity-and-reusability
#5
Yan Feng, Hui Zhang, Baifu Xin, Jie Wu
A two-step method was employed to synthesize reduced graphene oxide nanosheets/magnetite-palladium (rGSs/Fe3O4-Pd) aerogel, with excellent catalytic activity and recyclability. Firstly, graphene oxide nanosheet (GS) hydrogels were formed by the self-assembly of GSs during the hydrothermal process. Meanwhile, hematite (α-Fe2O3) and Pd nanoparticles (NPs) were synthesized and anchored onto the surface of the hydrogel. During heat-treatment, GSs were reduced to rGSs, while nonmagnetic α-Fe2O3NPs were converted to magnetic Fe3O4 NPs...
July 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28734125/a-systematic-review-and-meta-analysis-of-cold-in-situ-perfusion-and-preservation-of-the-hepatic-allograft-working-towards-a-unified-approach
#6
REVIEW
Ahmer M Hameed, Jerome M Laurence, Vincent W T Lam, Henry C Pleass, Wayne J Hawthorne
BACKGROUND: The efficacy of cold in situ perfusion and static storage of the liver is one possible determinant of transplantation outcomes. The aim of this study was to determine whether there is evidence to substantiate a preference for a particular perfusion route (aortic or dual) or perfusion/preservation solution in donation after brain-death (DBD) liver transplantation. METHODS: The Embase, Medline and Cochrane databases were utilized (1980-2017). Random effects modeling was used to estimate effects on transplantation outcomes based upon (i) aortic or dual in situ perfusion, and (ii) the use of University of Wisconsin (UW), histidine-tryptophan-ketoglutarate (HTK), Celsior and/or Institut Georges Lopez-1 (IGL-1) for perfusion/preservation...
July 22, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28734112/fused-multivariate-empirical-mode-decomposition-memd-and-inverse-solution-method-for-eeg-source-localization
#7
Pegah Khosropanah, Abdul Rahman Ramli, Kheng Seang Lim, Mohammad Hamiruce Marhaban, Anvarjon Ahmedov
EEG source localization is determining possible cortical sources of brain activities with scalp EEG. Generally, every step of the data processing sequence affects the accuracy of EEG source localization. In this paper, we introduce a fused multivariate empirical mode decomposing (MEMD) and inverse solution algorithm with an embedded unsupervised eye blink remover in order to localize the epileptogenic zone accurately. For this purpose, we constructed realistic forward models using MRI and boundary element method (BEM) for each patient to obtain results that are more realistic...
July 22, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28732407/a-synergistic-combination-of-nutrient-reclamation-from-manure-and-resultant-hydrochar-upgradation-by-acid-supported-hydrothermal-carbonization
#8
Lichun Dai, Bo Yang, Hong Li, Furong Tan, Nengmin Zhu, Qili Zhu, Mingxiong He, Yi Ran, Guoquan Hu
Cattle manure was hydrothermally carbonized in acid solutions (0-2% HCl), then nutrient concentration in liquid product and physicochemical properties of hydrochar were characterized to investigate the effects of acid addition on hydrochar properties and nutrient recovery from manure. Results showed that hydrothermal carbonization (HTC) in 2% HCl extracted almost 100% and 63.38% of phosphorus and nitrogen, respectively; specifically, >90% of the extracted phosphorus was PO4-P in liquid from HTC with acid addition, and increasing amount of extracted nitrogen was NH4-N with increasing acid addition...
July 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28732394/surface-charge-effects-on-the-electro-orientation-of-insulating-boron-nitride-nanotubes-in-aqueous-suspension
#9
Semih Cetindag, Bishnu Tiwari, Dongyan Zhang, Yoke Khin Yap, Sangil Kim, Jerry W Shan
The alignment of hexagonal boron-nitride nanotubes (BNNTs) in aqueous KCl solutions under spatially uniform electric fields was examined experimentally, using direct optical visualization to probe the orientation dynamics of individual BNNTs for different electric-field frequencies. Different from most previously studied nanowires and nanotubes, BNNTs are wide-bandgap materials which are essentially insulating at room temperature. We analyze the electro-orientation of BNNTs in the general context of polarizable cylindrical particles in liquid suspensions, whose behavior can fall into different regimes, including alignment due to Maxwell-Wagner induced dipoles at high frequencies, and alignment due to fluid motion of the electrical double layer around the particles at lower frequencies...
May 29, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28732275/plot-farm-and-watershed-scale-effects-of-coffee-cultivation-in-runoff-and-sediment-production-in-western-puerto-rico
#10
Carlos E Ramos-Scharrón, Yasiel Figueroa-Sánchez
The combination of a topographically abrupt wet-tropical setting with the high level of soil exposure that typifies many sun-grown coffee farms represents optimal conditions for high erosion rates. Although traditionally considered as a main cause for water resource degradation, limited empirical evidence has existed to document its true contribution. This study relies on plot-scale experimental results conducted in western Puerto Rico to assess the impact of cultivated surfaces and farm access roads on runoff and sediment production from the plot to the farm and watershed scales...
July 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28732268/validation-comparison-and-combination-of-algorithms-for-automatic-detection-of-pulmonary-nodules-in-computed-tomography-images-the-luna16-challenge
#11
Arnaud Arindra Adiyoso Setio, Alberto Traverso, Thomas de Bel, Moira S N Berens, Cas van den Bogaard, Piergiorgio Cerello, Hao Chen, Qi Dou, Maria Evelina Fantacci, Bram Geurts, Robbert van der Gugten, Pheng Ann Heng, Bart Jansen, Michael M J de Kaste, Valentin Kotov, Jack Yu-Hung Lin, Jeroen T M C Manders, Alexander Sóñora-Mengana, Juan Carlos García-Naranjo, Evgenia Papavasileiou, Mathias Prokop, Marco Saletta, Cornelia M Schaefer-Prokop, Ernst T Scholten, Luuk Scholten, Miranda M Snoeren, Ernesto Lopez Torres, Jef Vandemeulebroucke, Nicole Walasek, Guido C A Zuidhof, Bram van Ginneken, Colin Jacobs
Automatic detection of pulmonary nodules in thoracic computed tomography (CT) scans has been an active area of research for the last two decades. However, there have only been few studies that provide a comparative performance evaluation of different systems on a common database. We have therefore set up the LUNA16 challenge, an objective evaluation framework for automatic nodule detection algorithms using the largest publicly available reference database of chest CT scans, the LIDC-IDRI data set. In LUNA16, participants develop their algorithm and upload their predictions on 888 CT scans in one of the two tracks: 1) the complete nodule detection track where a complete CAD system should be developed, or 2) the false positive reduction track where a provided set of nodule candidates should be classified...
July 13, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28732232/periodicity-and-stability-for-variable-time-impulsive-neural-networks
#12
Hongfei Li, Chuandong Li, Tingwen Huang
The paper considers a general neural networks model with variable-time impulses. It is shown that each solution of the system intersects with every discontinuous surface exactly once via several new well-proposed assumptions. Moreover, based on the comparison principle, this paper shows that neural networks with variable-time impulse can be reduced to the corresponding neural network with fixed-time impulses under well-selected conditions. Meanwhile, the fixed-time impulsive systems can be regarded as the comparison system of the variable-time impulsive neural networks...
June 29, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28732224/three-dimensional-changes-in-the-upper-airway-of-skeletal-class-iii-patients-after-different-orthognathic-surgical-procedures
#13
Yuxue Yang, Kai Yang, Ying Zhao
PURPOSE: We hypothesized that 3-dimensional changes in the upper airway of patients with skeletal Class III malocclusion are different after mandibular setback and maxillary advancement (MSMA) compared with mandibular setback (MS) and that upper airway changes and the amount of jaw movement are correlated. PATIENTS AND METHODS: Skeletal Class III patients who underwent MS surgery or MSMA surgery were included in this retrospective cohort study. Cone beam computed tomography scans were acquired before and 3 months after surgery...
June 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28732223/effect-of-piezoelectric-units-on-the-implantable-cardioverter-and-defibrillator
#14
Gonzalo Gómez Val, Fernando Jara, Baltasar Sánchez, Miguel Roig, Ricard Ferrer, Fernando Duran-Sindreu
PURPOSE: Evidence-based research appears to conflict on the potential risk of electromagnetic interference (EMI) between piezoelectric units (Pzs) and implantable cardioverters and defibrillators (ICDs). The purpose of this study was to observe whether the EMI produced by Pzs is hazardous for ICDs. MATERIALS AND METHODS: A cross-sectional study of 6 Pzs was conducted in vitro for EMI using an ICD system. To simulate the human body's electrical resistance, electrographic recordings were made of the ICD and lead that were immersed in a bath of saline solution...
June 29, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28732188/adapted-methods-for-scanning-electron-microscopy-in-assessment-of-human-sperm-morphology
#15
Petra Nussdorfer, Ines Cilenšek, Branko Zorn, Daniel Petrovič
Infertility is a widespread problem, and in some cases, the routine basic semen analysis is not sufficient to detect the cause of male infertility. The use of the scanning electron microscope (SEM) could provide a detailed insight into spermatozoa morphology, but it requires specific sample preparation techniques. The purpose of this study was to select, adjust, and optimize a method for the preparation of spermatozoa samples prior to SEM analysis, and to establish the protocol required for its use in clinical practice...
July 21, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28732132/entrapment-of-amino-acids-in-gas-phase-surfactant-assemblies-the-case-of-tryptophan-confined-in-positively-charged-1r-2s-dodecyl-2-hydroxy-1-methyl-2-phenylethyl-dimethylammonium-bromide-aggregates
#16
David Bongiorno, Valentina Calabrese, Leopoldo Ceraulo, Serena Indelicato, Vincenzo Turco Liveri
The ability of positively charged aggregates of the surfactant (1R,2S)-Dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) to incorporate D- or L-tryptophan in the gas-phase has been investigated by electrospray ion mobility mass spectrometry (ESI-IM-MS). Strongly impacted by the pH of the electrosprayed solutions, both protonated (T(+) ) and deprotonated (T(-) ) tryptophan are effectively included into the aggregates whereas, tryptophan in zwitterionic (T(0) ) form is practically absent in singly charged DMEB aggregates but can be found in multiply charged ones...
July 21, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28732036/an-accurate-coarse-grained-model-for-chitosan-polysaccharides-in-aqueous-solution
#17
Levan Tsereteli, Andrea Grafmüller
Computational models can provide detailed information about molecular conformations and interactions in solution, which is currently inaccessible by other means in many cases. Here we describe an efficient and precise coarse-grained model for long polysaccharides in aqueous solution at different physico-chemical conditions such as pH and ionic strength. The Model is carefully constructed based on all-atom simulations of small saccharides and metadynamics sampling of the dihedral angles in the glycosidic links, which represent the most flexible degrees of freedom of the polysaccharides...
2017: PloS One
https://www.readbyqxmd.com/read/28731924/clinical-trial-registry-use-in-anaesthesiology-systematic-reviews-a-cross-sectional-study-of-systematic-reviews-published-in-anaesthesiology-journals-and-the-cochrane-library
#18
Blake A Umberham, Byron N Detweiler, Matthew T Sims, Matt Vassar
BACKGROUND: Publication bias within systematic reviews may result in incorrect conclusions leading to inappropriate clinical decisions and a decreased quality of patient care. Searching clinical trial registries for unpublished studies is one possible solution to minimise publication bias. OBJECTIVES: To examine rates of clinical trial registry searches in systematic reviews published in respected anaesthesiology journals and whether these searches found trials (or data) eligible for inclusion; to compare rates of registry searches between published reviews and similar reviews within the Cochrane Anaesthesia, Critical and Emergency Care Group; to conduct trial registry searches for a subset of reviews, determining whether eligible studies were overlooked; to investigate whether reporting of results in completed anaesthesia trials on ClinicalTrials...
July 20, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28731857/cytomcs-a-multiple-maximum-common-subgraph-detection-tool-for-cytoscape
#19
Simon J Larsen, Jan Baumbach
Comparative analysis of biological networks is a major problem in computational integrative systems biology. By computing the maximum common edge subgraph between a set of networks, one is able to detect conserved substructures between them and quantify their topological similarity. To aid such analyses we have developed CytoMCS, a Cytoscape app for computing inexact solutions to the maximum common edge subgraph problem for two or more graphs. Our algorithm uses an iterative local search heuristic for computing conserved subgraphs, optimizing a squared edge conservation score that is able to detect not only fully conserved edges but also partially conserved edges...
July 21, 2017: Journal of Integrative Bioinformatics
https://www.readbyqxmd.com/read/28731841/survey-of-nutrition-management-practices-in-centers-for-pediatric-intestinal-rehabilitation
#20
Anita M Nucci, Kipp Ellsworth, Austin Michalski, Emily Nagel, Jackie Wessel
BACKGROUND: Nutrition management of pediatric intestinal failure (IF) requires interdisciplinary coordination of parenteral nutrition (PN) and enteral nutrition (EN) support. Nutrition strategies used by specialists in pediatric intestinal rehabilitation to promote gut adaptation and manage complications have not been previously summarized. METHODS: A practice survey was distributed to members of the dietitian subgroup of the American Society for Parenteral and Enteral Nutrition Pediatric Intestinal Failure Section...
July 1, 2017: Nutrition in Clinical Practice
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