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https://www.readbyqxmd.com/read/28221874/comparing-thermal-process-validation-methods-for-salmonella-inactivation-on-almond-kernels
#1
Sanghyup Jeong, Bradley P Marks, Michael K James
Ongoing regulatory changes are increasing the need for reliable process validation methods for pathogen reduction processes involving low-moisture products; however, the reliability of various validation methods has not been evaluated. Therefore, the objective was to quantify accuracy and repeatability of four validation methods (two biologically based and two based on time-temperature models) for thermal pasteurization of almonds. Almond kernels were inoculated with Salmonella Enteritidis phage type 30 or Enterococcus faecium (NRRL B-2354) at ~10(8) CFU/g, equilibrated to 0...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28214115/warm-summers-and-moderate-winter-precipitation-boost-rhododendron-ferrugineum-l-growth-in-the-taillefer-massif-french-alps
#2
L Francon, C Corona, E Roussel, J Lopez Saez, M Stoffel
Rhododendron ferrugineum L. is a widespread dwarf shrub species growing in high-elevation, alpine environments of the Western European Alps. For this reason, analysis of its growth rings offers unique opportunities to push current dendrochronological networks into extreme environments and way beyond the treeline. Given that different species of the same genus have been successfully used in tree-ring investigations, notably in the Himalayas where Rhododendron spp. has proven to be a reliable climate proxy, this study aims at (i) evaluating the dendroclimatological potential of R...
February 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28203012/-effects-of-saliva-contamination-on-bond-strength-of-resin-resin-interfaces
#3
H J Guo, C Z Gao, F Lin, W Liu, L Yue
OBJECTIVE: To estimate the bond strength between different resin composite interfaces, and to evaluate the effect of saliva contamination and management with the contamination on the bond strength. METHODS: Two commercial resin composites containing different types of fillers (AP-X: barium-glass; P60: quartz) were tested in this study. The basic composite blocks were made of AP-X. After wet-ground flatted, the experimental groups were divided into three groups according to the surface treatment: (1)Direct bonding group: the bonding surface was rinsed with distilled water for 20 s, then dried with oil-free air for 20 s; (2)Saliva contamination group: the bonding surface was bathed in saliva for 30 min, then distilled water was rinsed for 20 s and dried with oil-free air for 20 s; (3)Saliva contamination and 75% ethanol wiping group: bonding surface bathed in saliva for 30 min, then wipe the surface with 75% ethanol, distilled water rinse for 20 s and dry with oil-free air for 20 s; The control group was made of the basic composite bulks of AP-X directly bonding with composite P60...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198631/robust-alginate-catechol-polydopamine-free-standing-mem-branes-obtained-from-the-water-air-interface
#4
Florian Ponzio, Vincent Le Houérou, Spyridon Zafeiratos, Christian Gauthier, Tony Garnier, Loic Jierry, Vincent Ball
The formation of polydopamine composite membranes at the water/air interface using different chemical strategies is reported. The use of either small molecules (urea, pyrocatechol) or polymers paves the way to understand which kind of compounds can be used for the formation of PDA-composite free-standing membranes produced at the water/air inter-face. Based on these screening results, we have found that alginate grafted with catechol groups allows the formation of robust free-standing films with asymmetric composition, stimuli-responsive and self-healing properties...
February 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28197387/ciita-driven-mhc-class-ii-expressing-tumor-cells-can-efficiently-prime-naive-cd4-th-cells-in-vivo-and-vaccinate-the-host-against-parental-mhc-ii-negative-tumor-cells
#5
Farah Bou Nasser Eddine, Greta Forlani, Letizia Lombardo, Alessandra Tedeschi, Giovanna Tosi, Roberto S Accolla
Our previous studies showed that non-immunogenic H-2(d) tumor cells of distinct epithelial histotypes can become highly immunogenic, induce a protective CD4(+) T cell response and vaccinate the animals against parental MHC-II-negative cells if they are rendered MHC class II-positive by stable transfection with the Air-1-encoded MHC-II transcriptional activator CIITA. These studies did not establish, however, whether tumor immunity was the consequence of a direct priming of naive CD4(+) T lymphocytes by CIITA-driven MHC-II-expressing tumor cells or by MHC-II-tumor antigen complexes engulfed by dendritic cells (DC) and exposed on the surface of these professional antigen presenting cells (APC)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28186804/light-induced-pulling-and-pushing-by-the-synergic-effect-of-optical-force-and-photophoretic-force
#6
Jinsheng Lu, Hangbo Yang, Lina Zhou, Yuanqing Yang, Si Luo, Qiang Li, Min Qiu
Optical force, coming from momentum exchange during light-matter interactions, has been widely utilized to manipulate microscopic objects, though mostly in vacuum or in liquids. By contrast, due to the light-induced thermal effect, photophoretic force provides an alternative and effective way to transport light-absorbing particles in ambient gases. However, in most cases these forces work independently. Here, by employing the synergy of optical force and photophoretic force, we propose and experimentally demonstrate a configuration which can drive a micron-size metallic plate moving back and forth on a tapered fiber with supercontinuum light in ambient air...
January 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28186686/combined-bone-marrow-derived-mesenchymal-stromal-cell-therapy-and-one-way-endobronchial-valve-placement-in-patients-with-pulmonary-emphysema-a-phase-i-clinical-trial
#7
Hugo Goulart de Oliveira, Fernanda Ferreira Cruz, Mariana Alves Antunes, Amarilio Vieira de Macedo Neto, Guilherme Augusto Oliveira, Fabio Munhoz Svartman, Tamara Borgonovo, Carmen Lucia Kuniyoshi Rebelatto, Daniel J Weiss, Paulo Roberto Slud Brofman, Marcelo Marcos Morales, José Roberto Lapa E Silva, Patricia Rieken Macedo Rocco
One-way endobronchial valves (EBV) insertion to reduce pulmonary air trapping has been used as therapy for chronic obstructive pulmonary disease (COPD) patients. However, local inflammation may result and can contribute to worsening of clinical status in these patients. We hypothesized that combined EBV insertion and intrabronchial administration of mesenchymal stromal cells (MSCs) would decrease the inflammatory process, thus mitigating EBV complications in severe COPD patients. This initial study sought to investigate the safety of this approach...
December 9, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28185332/nitrogen-doped-co3-o4-mesoporous-nanowire-arrays-as-an-additive-free-air-cathode-for-flexible-solid-state-zinc-air-batteries
#8
Minghao Yu, Zhengke Wang, Cheng Hou, Zilong Wang, Chaolun Liang, Cunyuan Zhao, Yexiang Tong, Xihong Lu, Shihe Yang
The kinetically sluggish rate of oxygen reduction reaction (ORR) on the cathode side is one of the main bottlenecks of zinc-air batteries (ZABs), and thus the search for an efficient and cost-effective catalyst for ORR is highly pursued. Co3 O4 has received ever-growing interest as a promising ORR catalyst due to the unique advantages of low-cost, earth abundance and decent catalytic activity. However, owing to the poor conductivity as a result of its semiconducting nature, the ORR activity of the Co3 O4 catalyst is still far below the expectation...
February 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28184314/-doc-can-i-fly-to-australia-a-case-report-and-review-of-delirium-following-long-haul-flight
#9
Thomas McCabe
Air travel is now a common feature of most of our elderly population's lives. There is little by way of warnings, rules or recommendations for our patients with psychiatric diagnoses, in particular dementia, who intend to travel by plane, in contrast to other specialties. In this article I highlight an adverse outcome of long-haul air travel as a result of delirium and resulting accelerated decline in overall cognitive function. I review literature related to the topic and suggest ways to minimise precipitating factors for stressors prior to and during flights...
February 2017: BJPsych Bulletin
https://www.readbyqxmd.com/read/28177951/biomass-burning-as-a-source-of-ambient-fine-particulate-air-pollution-and-acute-myocardial-infarction
#10
Scott Weichenthal, Ryan Kulka, Eric Lavigne, David van Rijswijk, Michael Brauer, Paul J Villeneuve, Dave Stieb, Lawrence Joseph, Rick T Burnett
BACKGROUND: Biomass burning is an important source of ambient fine particulate air pollution (PM2.5) in many regions of the world. METHODS: We conducted a time-stratified case-crossover study of ambient PM2.5 and hospital admissions for myocardial infarction (MI) in three regions of British Columbia, Canada. Daily hospital admission data were collected between 2008-2015 and PM2.5 data were collected from fixed-site monitors. We used conditional logistic regression models to estimate odds ratios (ORs) describing the association between PM2...
February 3, 2017: Epidemiology
https://www.readbyqxmd.com/read/28173892/optimizing-atom-probe-analysis-with-synchronous-laser-pulsing-and-voltage-pulsing
#11
Lu Zhao, Antoine Normand, Jonathan Houard, Ivan Blum, Fabien Delaroche, Olivier Latry, Blaise Ravelo, Francois Vurpillot
Atom probe has been developed for investigating materials at the atomic scale and in three dimensions by using either high-voltage (HV) pulses or laser pulses to trigger the field evaporation of surface atoms. In this paper, we propose an atom probe setup with pulsed evaporation achieved by simultaneous application of both methods. This provides a simple way to improve mass resolution without degrading the intrinsic spatial resolution of the instrument. The basic principle of this setup is the combination of both modes, but with a precise control of the delay (at a femtosecond timescale) between voltage and laser pulses...
February 8, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28168614/tio2-based-nanomaterials-for-gas-sensing-influence-of-anatase-and-rutile-contributions
#12
K Zakrzewska, M Radecka
The paper deals with application of three nanomaterial systems: undoped TiO2, chromium-doped TiO2:Cr and TiO2-SnO2 synthesized by flame spray synthesis (FSS) technique for hydrogen sensing. The emphasis is put on the role of anatase and rutile polymorphic forms of TiO2 in enhancing sensitivity towards reducing gases. Anatase-to-rutile transformation is achieved by annealing of undoped TiO2 in air at 700 °C, specific Cr doping and modification with SnO2. Undoped TiO2 and TiO2-SnO2 exhibit n-type behaviour and while TiO2: 5 at...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28166626/in-use-nox-emissions-from-diesel-and-liquefied-natural-gas-refuse-trucks-equipped-with-scr-and-twc-respectively
#13
Chandan Misra, Chris Ruehl, John Francis Collins, Don Chernich, Jorn Herner
The California Air Resources Board (ARB) and the City of Sacramento undertook this study to characterize the in-use emissions from model year (MY) 2010 or newer diesel, liquefied natural gas (LNG) and hydraulic hybrid diesel engines during real-world refuse truck operation. Emissions from five trucks: two diesels equipped with selective catalytic reduction (SCR), two LNG's equipped with three-way catalyst (TWC) and one hydraulic hybrid diesel equipped with SCR were measured using a portable emissions measurement system (PEMS) in the Sacramento area...
February 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28166458/moves-matrix-and-distributed-computing-for-microscale-line-source-dispersion-analysis
#14
Haobing Liu, Xiaodan Xu, Michael O Rodgers, Yanzhi Ann Xu, Randall L Guensler
MOVES and AERMOD are the U.S. Environmental Protection Agency's recommended models for use in project-level transportation conformity and hot-spot analysis. However, the structure and algorithms involved in running MOVES make analyses cumbersome and time-consuming. Likewise, the modeling setup process, including extensive data requirements and required input formats, in AERMOD lead to a high potential for analysis error in dispersion modeling. This study presents a distributed computing method for line source dispersion modeling that integrates MOVES-Matrix, a high-performance emission modeling tool, with the microscale dispersion models CALINE4 and AERMOD...
February 6, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28160537/transboundary-air-pollution-transport-in-the-czech-polish-border-region-between-the-cities-of-ostrava-and-katowice
#15
Libor Černikovský, Blanka Krejčí, Zdeněk Blažek, Vladimíra Volná
OBJECTIVE: The Czech Hydrometeorological Institute (CHMI) estimated the transboundary transport of air pollution between the Czech Republic and Poland by assessing relationships between weather conditions and air pollution in the area as part of the "Air Quality Information System in the Polish-Czech border of the Silesian and Moravian-Silesian region" project (http://www.air-silesia.eu). Estimation of cross-border transport of pollutants is important for Czech-Polish negotiations and targeted measures for improving air quality...
December 2016: Central European Journal of Public Health
https://www.readbyqxmd.com/read/28151457/effectiveness-of-stapedotomy-in-improving-hearing-sensitivity-for-53-otosclerotic-patients-retrospective-review
#16
Farid Alzhrani, Mohammad M Mokhatrish, Murad O Al-Momani, Hassan Alshehri, Abdulrahman Hagr, Soha N Garadat
BACKGROUND: Otosclerosis is a common cause of progressive hearing impairment that causes fixation of the stapes. Surgical intervention is the preferred treatment approach to ameliorate the conductive hearing loss associated with stapedial otosclerosis. However, given that it is a difficult and delicate procedure, the surgery may fail for a number of reasons. Therefore, it is very important to evaluate the success rate of the surgical approach used in each regional center. OBJECTIVE: To examine the effectiveness of stapedotomy in improving hearing sensitivity for otosclerotic patients at King Abdul Aziz University Hospital in Riyadh...
January 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28150879/modification-of-cysteine
#17
Gregory A Grant
This unit describes a number of methods for modifying cysteine residues of proteins and peptides. A general procedure for alkylation of cysteine residues in a protein of known size and composition with haloacyl reagents or N-ethylmaleimide (NEM) is presented, and alternate protocols describe similar procedures for use when the size and composition are not known and when only very small amounts of protein are available. Alkylations that introduce amino groups using bromopropylamine and N-(iodoethyl)-trifluoroacetamide are also presented...
February 2, 2017: Current Protocols in Protein Science
https://www.readbyqxmd.com/read/28149559/a-bench-evaluation-of-fraction-of-oxygen-in-air-delivery-and-tidal-volume-accuracy-in-home-care-ventilators-available-for-hospital-use
#18
Loredana Baboi, Fabien Subtil, Claude Guérin
BACKGROUND: Turbine-powered ventilators are not only designed for long-term ventilation at home but also for hospital use. It is important to verify their capabilities in delivering fraction of oxygen in air (FIO2) and tidal volume (VT). METHODS: We assessed the FIO2 accuracy and the VT delivery in four home care ventilators (HCV) on the bench. The four HCV were Astral 150, Elisée 150, Monnal T50 and Trilogy 200 HCV, which were connected to a lung model (ASL 5000)...
December 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28146514/remote-and-rapid-micromachining-of-broadband-low-reflectivity-black-silicon-surfaces-by-femtosecond-laser-filaments
#19
Xuepeng Zhan, Huailiang Xu, Chunhao Li, Hongwei Zang, Chang Liu, Jihong Zhao, Hongbo Sun
We report an approach for remote and rapid fabrication of a broadband low-reflectivity black silicon surface by ablating crystalline silicon with femtosecond laser filaments in air. Porous microstructures on the processed silicon surface are formed, resulting in a significantly enhanced light trapping efficiency in a broadband (UV-IR) spectral range. It is found that the air filament can significantly reduce the average number of adopted pulses in a normalized fabrication area and enables the processing remotely, which opens a way toward remote and rapid micromachining of optoelectronic materials by femtosecond laser filaments...
February 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28146296/nasal-intermittent-positive-pressure-ventilation-nippv-versus-nasal-continuous-positive-airway-pressure-ncpap-for-preterm-neonates-after-extubation
#20
REVIEW
Brigitte Lemyre, Peter G Davis, Antonio G De Paoli, Haresh Kirpalani
BACKGROUND: Previous randomised trials and meta-analyses have shown that nasal continuous positive airway pressure (NCPAP) is a useful method for providing respiratory support after extubation. However, this treatment sometimes 'fails' in infants, and they may require endotracheal re-intubation with its attendant risks and expense. Nasal intermittent positive pressure ventilation (NIPPV) can augment NCPAP by delivering ventilator breaths via nasal prongs. Older children and adults with chronic respiratory failure benefit from NIPPV, and the technique has been applied to neonates...
February 1, 2017: Cochrane Database of Systematic Reviews
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