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https://www.readbyqxmd.com/read/28724285/elucidating-potential-energy-surfaces-for-singlet-o2-reactions-with-protonated-deprotonated-and-di-deprotonated-cystine-using-a-combination-of-approximately-spin-projected-density-functional-theory-and-guided-ion-beam-mass-spectrometry
#1
Wenchao Lu, I-Hsien Midas Tsai, Yan Sun, Wenjing Zhou, Jianbo Liu
The reactivity of cystine towards electronically excited singlet O2 (a(1)Δg) has been long debated, despite the fact that most organic disulfides are susceptible to oxidation by singlet O2. We report a combined experimental and computational study on reactions of singlet O2 with gas-phase cystine at different ionization and hydration states, aimed to determine reaction outcomes, mechanisms and potential energy surfaces. Ion-molecule collisions of protonated and di-deprotonated cystine ions with (1)O2, in both the absence and the presence of a water ligand, were measured over a center-of-mass collision energy (Ecol) range from 0...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28690738/-e-training-program-for-sterilization-in-isolated-military-operations-areas-solution-adopted-by-the-french-army
#2
Mederic Rouault, Marie-Audrey Vonesch, Claude Dussart
French Army Health Service provides medical support for armed forces deployed on external missions.In order to ensure the same health care quality in the theatre and in the metropolis, the Military Health Service provides sterilization of reusable medical devices by its own means. Army pharmacists carrying out an on-site mission comes from different domains: medical biology laboratory, research, medical supplies, hospital pharmacy or yet pharmaceutical laboratory for some reservists. Training program for sterilization in isolated military operations areas is therefore necessary in order to ensure knowledge uniformity...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28673343/prevalence-and-factors-associated-with-urogenital-schistosomiasis-among-primary-school-children-in-barrage-magba-sub-division-of-cameroon
#3
Anna Longdoh Njunda, Emmanuel Ngala Ndzi, Jules Clement Nguedia Assob, Henri-Lucien Fawmno Kamga, Emmanuel Tebit Kwenti
BACKGROUND: The purpose of this study was to determine the prevalence and intensity as well as the factors associated with urogenital schistosomiasis (US) in Barrage, a rural community around the Mape΄ dam, in the West region of Cameroon not previously documented for transmission. METHODS: In this cross sectional parasitological survey, 382 children were enrolled from three primary schools in the study area between March and May 2016. A semi-structured questionnaire was used to collect information on demographics, clinical and predisposing factors...
July 3, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28616833/use-of-preservative-agents-and-antibiotics-for-increased-poliovirus-survival-on-positively-charged-filters
#4
Christine Susan Fagnant, Alexandra Lynn Kossik, Nicolette Angela Zhou, Liliana Sánchez-Gonzalez, Jill Christin Falman, Erika Karen Keim, Yarrow Linden, Alana Scheibe, Kilala Sayisha Barnes, Nicola Koren Beck, David S Boyle, John Scott Meschke
Environmental surveillance of poliovirus (PV) and other non-enveloped viruses can help identify silent circulation and is necessary to certify eradication. The bag-mediated filtration system is an efficient method to filter large volumes of environmental waters at field sites for monitoring the presence of viruses. As filters may require long transit times to off-site laboratories for processing, viral inactivation or overgrowth of bacteria and fungi can interfere with virus detection and quantification (Miki and Jacquet in Aquatic Microb Ecol 51(2):195-208, 2008)...
June 14, 2017: Food and Environmental Virology
https://www.readbyqxmd.com/read/28502003/microsatellite-analysis-for-identification-of-individuals-using-bone-from-the-extinct-steller-s-sea-cow-hydrodamalis-gigas
#5
Jeffery F Warner, Michael G Harpole, Lorelei D Crerar
Microsatellite DNA can provide more detailed population genetic information than mitochondrial DNA which is normally used to research ancient bone. The methods detailed in this chapter can be utilized for any type of bone. However, for this example, four microsatellite loci were isolated from Steller's sea cow (Hydrodamalis gigas) using published primers for manatee and dugong microsatellites. The primers DduC05 (Broderick et al., Mol Ecol Notes 6:1275-1277, 2007), Tmakb60, TmaSC5 (Pause et al., Mol Ecol Notes 6: 1073-1076, 2007), and TmaE11 (Garcia-Rodriguez et al...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28253682/vocal-imitation-of-synthesised-sounds-varying-in-pitch-loudness-and-spectral-centroid
#6
Adib Mehrabi, Simon Dixon, Mark B Sandler
Vocal imitations are often used to convey sonic ideas [Lemaitre, Dessein, Susini, and Aura. (2011). Ecol. Psych. 23(4), 267-307]. For computer based systems to interpret these vocalisations, it is advantageous to apply knowledge of what happens when people vocalise sounds where the acoustic features have different temporal envelopes. In the present study, 19 experienced musicians and music producers were asked to imitate 44 sounds with one or two feature envelopes applied. The study addresses two main questions: (1) How accurately can people imitate ramp and modulation envelopes for pitch, loudness, and spectral centroid?; (2) What happens to this accuracy when people are asked to imitate two feature envelopes simultaneously? The results show that experienced musicians can imitate pitch, loudness, and spectral centroid accurately, and that imitation accuracy is generally preserved when the imitated stimuli combine two, non-necessarily congruent features...
February 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28229354/genetic-differentiation-of-colombian-populations-of-anopheles-darlingi-root-diptera-culicidae
#7
C Y Rosero, G I Jaramillo, R Gonzalez, H Cardenas
Anopheles darlingi Root is a primary vector of malaria in the neotropic region, a species not just highly anthropophilic but very efficient in transmitting Plasmodium species and considered the most important vector in the Amazon region. The main goal of this study was to determine the genetic structure of the A. darlingi populations using microsatellites (STR) in western and eastern regions of Colombia. DNA extraction was done with the cited protocol of band using the Genomic Prep™ cell and tissue isolation commercial kits...
February 23, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28220205/global-properties-of-nested-network-model-with-application-to-multi-epitope-hiv-ctl-dynamics
#8
Cameron Browne
Mathematical modeling and analysis can provide insight on the dynamics of ecosystems which maintain biodiversity in the face of competitive and prey-predator interactions. Of primary interests are the underlying structure and features which stabilize diverse ecological networks. Recently Korytowski and Smith (Theor Ecol 8(1):111-120, 2015) proved that a perfectly nested infection network, along with appropriate life history trade-offs, leads to coexistence and persistence of bacteria-phage communities in a chemostat model...
February 20, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28169554/architecture-medicalization-and-the-aesthetics-of-hygiene-at-the-%C3%A3-coles-maternelles
#9
Gina Greene
This article examines the focus on hygiene, medical surveillance, and physical regeneration in late 19(th) and early 20(th) century French nursery schools (écoles maternelles) and its impact on their architecture. Administrators had originally charged maternelles with providing education and motherly care to young children. But bureaucratic anxieties about physical degeneration and disease among French schoolchildren led to new practices focused on the body, which ultimately led to changes in the schools' architectural program and aesthetics...
2017: Canadian Bulletin of Medical History, Bulletin Canadien D'histoire de la Médecine
https://www.readbyqxmd.com/read/28148419/-professionals-training-and-refusal-of-nursing-care
#10
Corinne Bay
A patient's refusal of nursing care concerns the caregivers. Future professionals must be prepared for it and student nurses are trained to deal with such situations. It is also important to empower patients and support them in their choice. This article presents the example of the Haute École Robert Schuman in Libramont, Belgium.
October 2016: Revue de L'infirmière
https://www.readbyqxmd.com/read/28133897/tree-diversity-in-relation-to-tree-height-alternative-perspectives
#11
Thomas J Givnish
Marks et al. (Ecol. Lett., 19, 2016, 743-751) show that tree diversity increases with tree height in North America and argue it reflects habitat 'suitability'. This finding conflicts with classical results, lacks controls for covariates of tree height, and can be explained alternatively using the modified Janzen-Connell effect and regional variance in habitats.
March 2017: Ecology Letters
https://www.readbyqxmd.com/read/28102392/dynamics-of-the-o-h2-%C3%A2-oh-h-oh-h-proton-and-hydrogen-atom-transfer-reactions-on-the-two-lowest-potential-energy-surfaces
#12
Rodrigo Martínez, Miguel Paniagua, Jordi Mayneris-Perxachs, Pablo Gamallo, Miguel González
The dynamics of the title reaction was studied using mainly the quasiclassical trajectory (QCT) method on the ground 1(2)A'' (OH(+) channel) and first excited 1(2)A' (OH channel) potential energy surfaces (PESs) employing ab initio analytical representations of the PESs developed by us. Both PESs correspond to exoergic reactions, are barrierless and present a deep minimum along the minimum energy path (MEP). Some extra calculations (cross sections) were also performed with the time dependent quantum real wave packet method at the centrifugal sudden level (RWP-CS method)...
February 1, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28091750/ectomycorrhizal-fungal-diversity-associated-with-endemic-tristaniopsis-spp-myrtaceae-in-ultramafic-and-volcano-sedimentary-soils-in-new-caledonia
#13
Muhammad Waseem, Marc Ducousso, Yves Prin, Odile Domergue, Laure Hannibal, Clarisse Majorel, Philippe Jourand, Antoine Galiana
New Caledonian serpentine (ultramafic) soils contain high levels of toxic heavy metals, in particular nickel, (up to 20 g kg(-1)) and are deficient in essential elements like carbon, nitrogen and phosphorus while having a high magnesium/calcium ratio. Although previous studies showed that ectomycorrhizal symbioses could play an important role in the adaptation of the endemic plants to ultramafic soils (FEMS Microbiol Ecol 72:238-49, 2010), none of them have compared the diversity of microbial communities from ultramafic vs non-ultramafic soils in New Caledonia...
January 13, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28060508/exploration-of-the-singlet-o2-oxidation-of-8-oxoguanine-by-guided-ion-beam-scattering-and-density-functional-theory-changes-of-reaction-intermediates-energetics-and-kinetics-upon-protonation-deprotonation-and-hydration
#14
Yan Sun, Wenchao Lu, Jianbo Liu
8-Oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) is one of the most common DNA lesions resulting from reactive oxygen species and ionizing radiation, and is involved in mutagenesis, carcinogenesis, and cell death. Notably, 8-oxodGuo is more reactive toward singlet (a(1)Δg) O2 than the undamaged guanosine, and the lesions arising from the secondary oxidation of 8-oxodGuo are more mutagenic. Herein the (1)O2 oxidation of free base 8-oxoguanine (8-oxoG) was investigated at different initial conditions including protonated [8-oxoG + H](+), deprotonated [8-oxoG - H](-), and their monohydrates...
February 9, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28039963/comment-on-rieux-and-balloux-calibration-from-tip-dating-can-compromise-topological-accuracy-and-evolutionary-inference
#15
Brent C Emerson, Diego F Alvarado-Serrano, Michael J Hickerson
We contribute to the recent review of Rieux & Balloux, 2016, Mol. Ecol., 25, 1911 on inferences from tip-dated phylogenies by developing their discussion on the influence of population size (Ne ) under panmixia for the estimation of substitution rate (μ). We highlight how phylogenetic trees inferred with tip-dated sequences under large panmictic Ne tend to erroneously enforce an age-based coalescent pattern on the posterior distribution of trees, which in turn results in systematically inflated estimates of μ...
May 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28031975/from-ice-to-bugs-polymers-and-sugars-to-address-healthcare-challenges
#16
Matthew I Gibson
Matthew I Gibson talks to Francesca Lake, Managing Editor: After completing his PhD at the University of Durham (UK), Matthew moved to the Ecole Polytechnique Federale de Lausanne (Switzerland) where he researched nanoparticle delivery technology. In 2009, he then moved to the University of Warwick (UK), to establish his independent research group. He has since been promoted to assistant (2012), associate (2015) and full (2016) professor. His interdisciplinary group undertakes research with the core theme of using biomaterials to improve health...
September 2016: Future Science OA
https://www.readbyqxmd.com/read/27882710/john-porter-book-prize-lecture-bringing-the-social-back-in-on-the-integration-of-muslim-immigrants-and-the-jurisprudence-of-muslim-minorities
#17
Abdolmohammad Kazemipur
In much of the academic debate on the integration of Muslims into Western liberal democracies, Islam is often treated as one or the sole independent variable in the lives of Muslims. Offering to view Islam-or the understanding of Islam among Muslims-as the dependent variable, The Muslim Question in Canada discusses the influence of socioeconomic forces in shaping the Muslim immigrants' opinions, modes of thinking, and even interpretations of their faith. Drawing on this general approach, which is introduced and developed in the book using a variety of both quantitative and qualitative data, this article focuses on a school of thought within the Islamic jurisprudence known as fiqh al-aqalliyyat al-Muslema (the jurisprudence of Muslim minorities)...
November 2016: Canadian Review of Sociology, Revue Canadienne de Sociologie
https://www.readbyqxmd.com/read/27860125/new-method-to-study-ion-molecule-reactions-at-low-temperatures-and-application-to-the-h2-h2%C3%A2-h3-h-reaction
#18
Pitt Allmendinger, Johannes Deiglmayr, Otto Schullian, Katharina Höveler, Josef A Agner, Hansjürg Schmutz, Frédéric Merkt
Studies of ion-molecule reactions at low temperatures are difficult because stray electric fields in the reaction volume affect the kinetic energy of charged reaction partners. We describe a new experimental approach to study ion-molecule reactions at low temperatures and present, as example, a measurement of the H2++H2→H3++H reaction with the H2+ ion prepared in a single rovibrational state at collision energies in the range Ecol /kB =5-60 K. To reach such low-collision energies, we use a merged-beam approach and observe the reaction within the orbit of a Rydberg electron, which shields the ions from stray fields...
November 16, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/27833542/adaptive-automation-triggered-by-eeg-based-mental-workload-index-a-passive-brain-computer-interface-application-in-realistic-air-traffic-control-environment
#19
Pietro Aricò, Gianluca Borghini, Gianluca Di Flumeri, Alfredo Colosimo, Stefano Bonelli, Alessia Golfetti, Simone Pozzi, Jean-Paul Imbert, Géraud Granger, Raïlane Benhacene, Fabio Babiloni
Adaptive Automation (AA) is a promising approach to keep the task workload demand within appropriate levels in order to avoid both the under- and over-load conditions, hence enhancing the overall performance and safety of the human-machine system. The main issue on the use of AA is how to trigger the AA solutions without affecting the operative task. In this regard, passive Brain-Computer Interface (pBCI) systems are a good candidate to activate automation, since they are able to gather information about the covert behavior (e...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27830649/optimal-prediction-of-the-number-of-unseen-species
#20
Alon Orlitsky, Ananda Theertha Suresh, Yihong Wu
Estimating the number of unseen species is an important problem in many scientific endeavors. Its most popular formulation, introduced by Fisher et al. [Fisher RA, Corbet AS, Williams CB (1943) J Animal Ecol 12(1):42-58], uses n samples to predict the number U of hitherto unseen species that would be observed if [Formula: see text] new samples were collected. Of considerable interest is the largest ratio t between the number of new and existing samples for which U can be accurately predicted. In seminal works, Good and Toulmin [Good I, Toulmin G (1956) Biometrika 43(102):45-63] constructed an intriguing estimator that predicts U for all [Formula: see text] Subsequently, Efron and Thisted [Efron B, Thisted R (1976) Biometrika 63(3):435-447] proposed a modification that empirically predicts U even for some [Formula: see text], but without provable guarantees...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
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