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https://www.readbyqxmd.com/read/29040305/switching-and-optimizing-control-for-coal-flotation-process-based-on-a-hybrid-model
#1
Zhiyong Dong, Ranfeng Wang, Minqiang Fan, Xiang Fu
Flotation is an important part of coal preparation, and the flotation column is widely applied as efficient flotation equipment. This process is complex and affected by many factors, with the froth depth and reagent dosage being two of the most important and frequently manipulated variables. This paper proposes a new method of switching and optimizing control for the coal flotation process. A hybrid model is built and evaluated using industrial data. First, wavelet analysis and principal component analysis (PCA) are applied for signal pre-processing...
2017: PloS One
https://www.readbyqxmd.com/read/29040039/breast-cancer-risk-associations-with-digital-mammographic-density-by-pixel-brightness-threshold-and-mammographic-system
#2
Tuong L Nguyen, Yoon-Ho Choi, Ye K Aung, Christopher F Evans, Nhut H Trinh, Shuai Li, Gillian S Dite, Myeong-Seong Kim, Patrick C Brennan, Mark A Jenkins, Joohon Sung, Yun-Mi Song, John L Hopper
Purpose To compare three mammographic density measures defined by different pixel intensity thresholds as predictors of breast cancer risk for two different digital mammographic systems. Materials and Methods The Korean Breast Cancer Study included 398 women with invasive breast cancer and 737 control participants matched for age at mammography (±1 year), examination date, mammographic system, and menopausal status. Mammographic density was measured by using the automated Laboratory for Individualized Breast Radiodensity Assessment (LIBRA) software and the semiautomated Cumulus software at the conventional threshold (Cumulus) and at increasingly higher thresholds (Altocumulus and Cirrocumulus, respectively)...
October 16, 2017: Radiology
https://www.readbyqxmd.com/read/29039982/botryomycosis-a-surprising-revelation-in-the-lacrimal-sac
#3
Susan Dsouza, Gurudutt M Kamath, Ajay R Kamath, Kausalyakumari Sahoo, Harshita Sharma
A middle aged woman presented to us with a localised well defined swelling of 3 months duration. It was located just below the lower eyelid punctum and was constantly discharging whitish granules. We suspected it to be arising from the lacrimal apparatus and posted the patient for Dacryocystectomy. On the operating table we found a swelling in the region of the lacrimal sac which was later excised. Histopathology revealed Botryomycosis and Chronic Dacryocystitis. Botryomycosis is a rare condition and requires a high index of suspicion to diagnose it...
October 17, 2017: Orbit
https://www.readbyqxmd.com/read/29036889/single-administration-of-melatonin-modulates-the-nitroxidergic-system-at-the-peripheral-level-and-reduces-thermal-nociceptive-hypersensitivity-in-neuropathic-rats
#4
Elisa Borsani, Barbara Buffoli, Veronica Bonazza, Russel J Reiter, Rita Rezzani, Luigi F Rodella
Neuropathic pain is a severe condition with unsatisfactory treatments. Melatonin, an indolamine, seems to be a promising molecule suitable for this purpose due to its well-known anti-inflammatory, analgesic, and antioxidant effects, as well as its modulation of the nitroxidergic system. Nevertheless, the data on its mechanism of action and potentialities are currently insufficient in this pathology, especially at the peripheral level. Thus, this work evaluated the effect of a single administration of melatonin in an established mononeuropathy pain model that monitors the behaviour and the changes in the nitroxidergic system in dorsal root ganglia and skin, which are affected by nervous impairment...
October 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29036377/radon-chamber-in-the-central-mining-institute-the-calibration-facility-for-radon-and-radon-progeny-monitors
#5
K Skubacz, S Chalupnik, P Urban, M Wysocka
The article presents the advantages of the radon chamber with volume of 17 m3, that belongs to Silesian Centre for Environmental Radioactivity and its applicability for calibration of equipment designed to measure the radon concentration and its short-lived decay products. The chamber can be operated under controlled conditions in the range from -20 to 60°C and relative humidity from 20 to 90%. There is also discussed the influence of aerosol concentration and their size distribution on the calibration results...
September 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29036060/wave-optics-simulations-of-synthetic-aperture-ladar-performance-through-turbulence
#6
Bryce E Schumm, Matthew P Dierking
This paper utilizes a combination of theory and simulations to examine synthetic aperture imaging across a wide range of turbulence conditions. Extensive wave optics simulations are used to validate existing theory and to investigate the use of a common measurement technique. It demonstrates the applicability of earlier synthetic aperture laser radar (ladar) (SAL) research across a wide range of turbulence conditions, and examines the metric approaches and limitations for the imaging conditions normally seen in practical SAL systems...
October 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29035783/radiotracer-investigation-on-the-measurement-of-residence-time-distribution-in-an-ethyl-acetate-reactor-system-with-a-large-recycle-ratio
#7
Arghya Datta, Raj Kumar Gupta, Sunil Goswami, Vijay Kumar Sharma, Haripada Bhunia, Damandeep Singh, Harish Jagat Pant
A radiotracer investigation was carried out on the measurement of residence time distribution (RTD) of process fluid in an industrial-scale ethyl acetate reactor system, which consists of two independent reactors with recirculation and connected in series with each other. Bromine-82 as ammonium bromide was used as the radiotracer for the RTD experiments at different operating conditions. The individual reactors and the overall reactor system were modelled using physically representative phenomenological models comprising of continuously stirred tank reactors (CSTRs)...
September 25, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29035766/sequential-biofiltration-a-novel-approach-for-enhanced-biological-removal-of-trace-organic-chemicals-from-wastewater-treatment-plant-effluent
#8
Johann Müller, Jörg E Drewes, Uwe Hübner
Recent studies revealed the benefits of oligotrophic and oxic conditions for the biological removal of many trace organic chemicals (TOrCs) during soil-aquifer treatment. These findings indicate an unused tuning potential that might also be applicable in engineered biofiltration systems with drastically reduced hydraulic retention times for an enhanced mitigation of TOrCs during wastewater treatment. This study introduces the novel approach of sequential biofiltration (SBF) for the advanced treatment of secondary effluent using two granular media filters operated in series with an intermediate aeration step aiming for oxic and oligotrophic conditions in the second filter stage...
October 6, 2017: Water Research
https://www.readbyqxmd.com/read/29035765/a-force-based-mechanistic-model-for-describing-activated-sludge-settling-process
#9
Guihua Xu, Fengjun Yin, Yuanjian Xu, Han-Qing Yu
Sludge settling as the last step in the biological wastewater treatment process substantially affects the system performance, and thus the design and control optimization of the sludge settling process has been frequently investigated with mathematical modeling tools. So far, these models are developed on the basis of the solid flux theory with numerous parameters and complicated boundary conditions, and their prediction results are often unsatisfactory. In this work, a new force-based mechanical model with five parameters was developed, in which five forces were adopted and Newton's law, rather than the flux theory, was used to describe the sludge settling process...
October 10, 2017: Water Research
https://www.readbyqxmd.com/read/29035725/alterations-to-juvenile-zebrafish-danio-rerio-swim-performance-after-acute-embryonic-exposure-to-sub-lethal-exposures-of-hydraulic-fracturing-flowback-and-produced-water
#10
Erik J Folkerts, Tamzin A Blewett, Yuhe He, Greg G Goss
Hydraulic fracturing flowback and produced water (FPW) is a wastewater produced during fracturing activities in an operating well which is hyper saline and chemically heterogeneous in nature, containing both anthropogenic and petrogenic chemicals. Determination of FPW associated toxicity to embryonic fish is limited, while investigation into how embryonic exposures may affect later life stages is not yet studied. Zebrafish embryos (24hrs post fertilization) were acutely exposed to 2.5% and 5% FPW fractions for either 24 or 48hrs and returned to freshwater...
October 7, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29035701/does-sofa-predict-outcomes-better-than-sirs-in-brazilian-icu-patients-with-suspected-infection-a-retrospective-cohort-study
#11
Regis Goulart Rosa, Rafael Barberena Moraes, Thiago Costa Lisboa, Daniel Pretto Schunemann, Cassiano Teixeira
We compared the discriminatory capacity of the sequential organ failure assessment (SOFA) versus the systemic inflammatory response syndrome (SIRS) score for predicting ICU mortality, need for and length of mechanical ventilation (MV), ICU stay, and hospitalization in patients with suspected infection admitted to a mixed Brazilian ICU. We performed a retrospective analysis of a longitudinal ICU database from a tertiary hospital in Southern Brazil. Patients were categorized according to whether they met the criteria for sepsis according to SOFA (variation ≥2 points over the baseline clinical condition) and SIRS (SIRS score ≥2 points)...
October 13, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29035566/sulfidation-of-iron-based-materials-a-review-of-processes-and-implications-for-water-treatment-and-remediation
#12
Dimin Fan, Ying Lan, Paul G Tratnyek, Richard L Johnson, Jan Filip, Denis Michael O'Carroll, Ariel Nunez Garcia, Abinash Agrawal
Iron-based materials used in water treatment and groundwater remediation-especially micro- and nano-sized zerovalent iron (nZVI)-can be more effective when modified with lower-valent forms of sulfur (i.e., "sulfidated"). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals...
October 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29035094/doktor-kot-doktor-sla%C3%A2-%C3%A2-book-doctors-plant-doctors-and-the-segmentation-of-the-medical-market-place-in-meghalaya-northeast-india
#13
Sandra Albert, John Porter, Judith Green
Despite decades of research on India's plural health care market, the practices of many local health traditions outside the allopathic and codified traditions are under-studied. Drawing on interview and observational data, this paper explores the space in which indigenous traditional Khasi healers in Meghalaya state, northeast India, practice. Khasi indigenous healers describe themselves as doktor sla, plant doctors, to distinguish themselves from doktor kot, or book doctors. This distinction operates as a rhetorical resource, utilised to carve a distinct sphere of expertise in relation to the allopathic sector, and to mark claims for the specifically local appropriateness of traditional practices within a shifting market of state-sponsored provision...
October 16, 2017: Anthropology & Medicine
https://www.readbyqxmd.com/read/29034764/indeterminate-biliary-strictures-a-simplified-approach
#14
Chencheng Xie, Khalil Aloreidi, Bhavesh Patel, Timothy Ridgway, Thavam Thambi-Pillai, Gary Timmerman, Adeel Khan, Muslim Atiq
Pre-operative evaluation of biliary strictures remains challenging. The dilemma that exists is how to balance the risk of failing to detect malignancy and the potential morbidity caused by unnecessary surgery in patients with benign etiologies. With emerging novel diagnostic modalities, this study aims to assess the efficacy of diagnostic techniques and facilitate a clinical approach to indeterminate biliary strictures. Areas covered: Conventional imaging modalities are crucial in identifying the location of a stricture and are helpful for choosing further diagnostic modalities...
October 16, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29034470/involvement-of-the-nrf2-ho-1-co-axis-and-therapeutic-intervention-with-the-co-releasing-molecule-corm-a1-in-a-murine-model-of-autoimmune-hepatitis
#15
Katia Mangano, Eugenio Cavalli, Santa Mammana, Maria Sofia Basile, Rosario Caltabiano, Antonio Pesce, Stefano Puleo, Atanas G Atanasov, Gaetano Magro, Ferdinando Nicoletti, Paolo Fagone
Concanavalin A (ConA)-induced hepatitis is an experimental model of human autoimmune hepatitis induced in rodents by i.v. injection of Con A. The disease is characterized by increase in serum levels of transaminases and massive immune infiltration of the livers. Type 1, type 2 and type 17 cytokines play a pathogenic role in the development of ConA-induced hepatitis. To understand further the immunoregulatory mechanisms operating in the development and regulation of ConA-induced hepatitis, we have evaluated the role of the anti-inflammatory pathway Nrf2/HO-1/CO (Nuclear Factor E2-related Factor 2/Heme Oxygenase-1/Carbon Monoxide) in this condition and determined whether the in vivo administration of CO via the CO-releasing molecule (CORM) CORM-A1, influences serological and histological development of Con-A-induced hepatitis...
October 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29034428/heterogeneous-electro-fenton-catalyst-for-1-butylpyridinium-chloride-degradation
#16
Jessica Meijide, Marta Pazos, Maria Ángeles Sanromán
The application of the electro-Fenton process for organic compound mineralisation has been widely reported over the past years. However, operational problems related to the use of soluble iron salt as a homogeneous catalyst involve the development of novel catalysts that are able to operate in a wide pH range. For this purpose, polyvinyl alcohol-alginate beads, containing goethite as iron, were synthesised and evaluated as heterogeneous electro-Fenton catalyst for 1-butylpyridinium chloride mineralisation. The influence of catalyst dosage and pH solution on ionic liquid degradation was analysed, achieving almost total oxidation after 60 min under optimal conditions (2 g/L catalyst concentration and pH 3)...
October 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29034425/kinetics-of-imidazolium-based-ionic-liquids-degradation-in-aqueous-solution-by-fenton-oxidation
#17
Carmen M Domínguez, Macarena Munoz, Asunción Quintanilla, Zahara M de Pedro, Jose A Casas
In the last few years, several works dealing with Fenton oxidation of ionic liquids (ILs) have proved the capability of this technology for their degradation, achieving complete ILs removal and non-toxic effluents. Nevertheless, very little is known about the kinetics of this process, crucial for its potential application. In this work, the effect of several operating conditions, including reaction temperature (50-90 °C), catalyst load (10-50 mg L(-1) Fe(3+)), initial IL concentration (100-2000 mg L(-1)), and hydrogen peroxide dose (10-200% of the stoichiometric amount for the complete IL mineralization) on 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) oxidation has been investigated...
October 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29034396/defined-ph-sensitive-nanogels-as-gene-delivery-platform-for-sirna-mediated-in-vitro-gene-silencing
#18
Mathias Dimde, Falko Neumann, Felix Reisbeck, Svenja Ehrmann, Jose Luis Cuellar-Camacho, Dirk Steinhilber, Nan Ma, Rainer Haag
In the present study, a pH sensitive nanogel platform for gene delivery was developed. The cationic nanogels based on dendritic polyglycerol (dPG) and low molecular weight polyethylenimine units were able to encapsulate siRNA during the manufacturing process. The thiol-Michael nanoprecipitation method, which operates under mild conditions and did not require any catalyst or surfactant, was used to develop tailor-made nanogels in the sub-100 nm range. The incorporation of pH sensitive benzacetal-bonds inside the nanogel network enables the controlled intracellular release of the cargo...
October 16, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/29034368/solar-driven-thermochemical-splitting-of-co2-and-in-situ-separation-of-co-and-o2-across-a-ceria-redox-membrane-reactor
#19
Maria Tou, Ronald Michalsky, Aldo Steinfeld
Splitting CO2 with a thermochemical redox cycle utilizes the entire solar spectrum and provides a favorable path to the synthesis of solar fuels at high rates and efficiencies. However, the temperature/pressure swing commonly applied between reduction and oxidation steps incurs irreversible energy losses and severe material stresses. Here, we experimentally demonstrate for the first time the single-step continuous splitting of CO2 into separate streams of CO and O2 under steady-state isothermal/isobaric conditions...
September 6, 2017: Joule
https://www.readbyqxmd.com/read/29033783/the-mechanisms-of-psychedelic-visionary-experiences-hypotheses-from-evolutionary-psychology
#20
Michael J Winkelman
Neuropharmacological effects of psychedelics have profound cognitive, emotional, and social effects that inspired the development of cultures and religions worldwide. Findings that psychedelics objectively and reliably produce mystical experiences press the question of the neuropharmacological mechanisms by which these highly significant experiences are produced by exogenous neurotransmitter analogs. Humans have a long evolutionary relationship with psychedelics, a consequence of psychedelics' selective effects for human cognitive abilities, exemplified in the information rich visionary experiences...
2017: Frontiers in Neuroscience
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