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https://www.readbyqxmd.com/read/28924626/peppermint-trees-shift-their-phosphorus-acquisition-strategy-along-a-strong-gradient-of-plant-available-phosphorus-by-increasing-their-transpiration-at-very-low-phosphorus-availability
#1
Gang Huang, Patrick E Hayes, Megan H Ryan, Jiayin Pang, Hans Lambers
Some plant species use different strategies to acquire phosphorus (P) dependent on environmental conditions, but studies investigating the relative significance of P-acquisition strategies with changing P availability are rare. We combined a natural P availability gradient and a glasshouse study with 10 levels of P supplies to investigate the roles of rhizosphere carboxylates and transpiration-driven mass flow in P acquisition by Agonis flexuosa. Leaf P concentrations of A. flexuosa decreased and leaf manganese (Mn) concentrations increased with decreasing soil P concentration along a dune chronosequence...
September 18, 2017: Oecologia
https://www.readbyqxmd.com/read/28903713/is-it-a-dangerous-world-out-there-the-motivational-bases-of-american-gun-ownership
#2
Wolfgang Stroebe, N Pontus Leander, Arie W Kruglanski
Americans are the world's best armed citizens and public polling suggests protection/self-defense is their main reason for gun ownership. However, there is virtually no psychological research on gun ownership. The present article develops the first psychological process model of defensive gun ownership-specifically, a two-component model that considers both the antecedents and consequences of owning a gun for protection/self-defense. We demonstrate that different levels of threat construal-the specific perceived threat of assault and a diffuse threat of a dangerous world-independently predict handgun ownership; we also show how utility judgments can explain the motivated reasoning that drives beliefs about gun rights...
August 2017: Personality & Social Psychology Bulletin
https://www.readbyqxmd.com/read/28888173/lc-ms-ms-assay-for-the-quantitation-of-the-atr-kinase-inhibitor-vx-970-in-human-plasma
#3
Brian F Kiesel, Jonas Scemama, Robert A Parise, Liza Villaruz, Andre Iffland, Austin Doyle, Percy Ivy, Edward Chu, Christopher J Bakkenist, Jan H Beumer
DNA damaging chemotherapy and radiation are widely used standard-of-care modalities for the treatment of cancer. Nevertheless, the outcome for many patients remains poor and this may be attributed, at least in part, to highly effective DNA repair mechanisms. Ataxia-telangiectasia mutated and Rad3-related (ATR) is a key regulator of the DNA-damage response (DDR) that orchestrates the repair of damaged replication forks. ATR is a serine/threonine protein kinase and ATR kinase inhibitors potentiate chemotherapy and radiation...
August 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28886609/-the-hospital-emergency-plan-important-tool-for-disaster-preparedness
#4
Thomas Wurmb, Katja Scholtes, Felix Kolibay, Peer Rechenbach, Ulrich Vogel, Barbara Kowalzik
Hospitals need to be prepared for any kind of disaster. The terrorist attacks and mass shootings that took place in Europe in recent years impressively demonstrated the capability of hospitals to manage such challenging and disastrous events. To be adequately prepared, the hospital emergency plan is a very important tool. In this article we describe the entire process of drafting the emergency plan. We discuss the theoretical background as well as different models of disaster planning and we give important practical hints and tips for those in charge of the hospital disaster planning...
September 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/28879487/effects-of-supplement-with-sanitary-landfill-leachate-in-gas-exchange-of-sunflower-helianthus-annuus-l-seedlings-under-drought-stress
#5
Francisco H Nunes Junior, Valdineia S Freitas, Rosilene O Mesquita, Brennda B Braga, Rifandreo M Barbosa, Kaio Martins, Franklin A Gondim
Sanitary landfill leachate is one of the major problems arising from disposal of urban waste. Sanitary landfill leachate may, however, have use in agriculture. This study, therefore, aimed to analyze initial plant growth and gas exchange in sunflower seedlings supplemented with sanitary landfill leachate and subjected to drought stress through variables of root fresh mass (RFM), shoot fresh mass (SFM), total fresh mass (TFM), relative chlorophyll content (CL), stomatal conductance (g s ), transpiration rate (E), net photosynthetic rate (A), ratio of internal to external CO2 concentration (Ci/Ca),water use efficiency (EUA), instantaneous carboxylation efficiency (A/Ci), and electron transport rate (ETR)...
September 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28878509/an-improved-micropropagation-system-ex-vitro-rooting-and-validation-of-genetic-homogeneity-in-wild-female-momordica-dioica-an-underutilized-nutraceutical-vegetable-crop
#6
Sumitra Kumari Choudhary, Ashok Kumar Patel, Harish, Smita Shekhawat, Narpat S Shekhawat
Momordica dioica Roxb. ex Willd., is a perennial and dioecious (2n = 28) plant of family Cucurbitaceae. Conventional methods of propagation through seeds, stem cuttings and rhizomatous/tuberous roots are inadequate for its mass cultivation as a vegetable crop. This paper reports an improved and efficient micropropagation method for wild female M. dioica using nodal explants. Shoot amplification was achieved using subculturing of in vitro raised shoots on MS medium supplemented with various concentrations of 6-benzylaminopurine (BAP) alone or in combination with indole-3-acetic acid (IAA)...
July 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28866252/comprehensive-determination-of-flavouring-additives-and-nicotine-in-e-cigarette-refill-solutions-part-i-liquid-chromatography-tandem-mass-spectrometry-analysis
#7
Justyna Aszyk, Paweł Kubica, Agata Kot-Wasik, Jacek Namieśnik, Andrzej Wasik
Liquid chromatography-tandem mass spectrometry with electrospray ionization (HPLC-ESI-MS/MS) methods were developed for the simultaneous determination of 42 flavouring compounds and nicotine in liquids for e-cigarettes. The chromatographic separation was performed using an Ace(®) Ultracore™ SuperC18™ (100×2.1mm, 2.5μm) column in both acidic and alkaline pH conditions to separate all the compounds. A simple "dilute & shoot" approach was used for the sample preparation. The method validation was performed by evaluating key analytical parameters such as linearity, accuracy, selectivity, precision, limit of detection (LOD) and limit of quantification (LOQ)...
August 25, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28861250/does-responsiveness-to-arbuscular-mycorrhizal-fungi-depend-on-plant-invasive-status
#8
Kurt O Reinhart, Ylva Lekberg, John Klironomos, Hafiz Maherali
Differences in the direction and degree to which invasive alien and native plants are influenced by mycorrhizal associations could indicate a general mechanism of plant invasion, but whether or not such differences exist is unclear. Here, we tested whether mycorrhizal responsiveness varies by plant invasive status while controlling for phylogenetic relatedness among plants with two large grassland datasets. Mycorrhizal responsiveness was measured for 68 taxa from the Northern Plains, and data for 95 taxa from the Central Plains were included...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28859890/comprehensive-determination-of-flavouring-additives-and-nicotine-in-e-cigarette-refill-solutions-part-ii-gas-chromatography-mass-spectrometry-analysis
#9
Justyna Aszyk, Mateusz Kacper Woźniak, Paweł Kubica, Agata Kot-Wasik, Jacek Namieśnik, Andrzej Wasik
Flavouring compounds are an essential part of e-liquid products for cigarettes. In general, they are regarded as safe for ingestion, but they may have unrecognized risks when they are inhaled. In some cases, manufactures do not currently abide by the Tobacco Products Directive (2014/40/EU) and do not declare the detailed contents of e-liquids on their labels. To help evaluate the health impact of flavouring substances, there is a need for comprehensive approaches to determine their concentrations in e-liquids...
August 24, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28843884/a-multi-year-study-of-tillage-and-amendment-effects-on-compacted-soils
#10
Fatemeh Mohammadshirazi, Richard A McLaughlin, Joshua L Heitman, Virginia K Brown
Constructing roads and buildings often involves removal of topsoil, grading, and traffic from heavy machinery. The result is exposed, compacted subsoil with low infiltration rate (IR), which hinders post-construction vegetation establishment and generates significant runoff, similar to impervious surfaces. Our goal was to assess tillage and adding amendments for improving density and maintaining perviousness of subsoils compacted during construction. The effects of tillage with and without amendments on (1) soil compaction, (2) IR, and (3) vegetative growth at five sites in North Carolina, USA were evaluated over a period of up to 32 months...
August 24, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28843861/shoot-regeneration-a-journey-from-acquisition-of-competence-to-completion
#11
REVIEW
Dhanya Radhakrishnan, Abdul Kareem, Kavya Durgaprasad, E Sreeraj, Kaoru Sugimoto, Kalika Prasad
Plants display an extraordinary ability to regenerate complete shoot systems from a tissue fragment or even from a single cell. Upregulation of the determinants of pluripotency during a precise window of time in response to external inductive cues is a key decisive factor for shoot regeneration. A burst of recent studies has begun to provide an understanding of signaling molecules that are instrumental in the making of the regenerative mass, as well as the developmental regulators that are seminal in shaping the pluripotent state...
August 30, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28842031/coupling-sweeping-micellar-electrokinetic-chromatography-with-tandem-mass-spectrometry-for-the-therapeutic-monitoring-of-benzimidazoles-in-animal-urine-by-dilute-and-shoot
#12
Carmen Tejada-Casado, David Moreno-González, Monsalud Del Olmo-Iruela, Ana M García-Campaña, Francisco J Lara
A new method based on micellar electrokinetic chromatography-tandem mass spectrometry (MEKC-MS/MS) has been developed for the identification and simultaneous quantification of thirteen benzimidazoles in animal urine. In order to obtain an appropriate separation with the highest sensitivity, different electrophoretic parameters were evaluated. Under optimum conditions, the separation was performed using ammonium perfluorooctanoate as volatile surfactant and electrophoretic buffer (50mM, pH 9). To increase the sensitivity, a stacking mode named sweeping was applied, using water as injection solvent at 50mbar for 75s, obtaining sensitivity enhancement factors from 50 to 181...
December 1, 2017: Talanta
https://www.readbyqxmd.com/read/28841045/guns-culture-or-mental-health-framing-mass-shootings-as-a-public-health-crisis
#13
Ruth DeFoster, Natashia Swalve
In recent years, public health scholars and policymakers have been calling for increased research on the public health implications of gun violence. However, scientific research on this issue has been stifled by a 1996 budget rider that eliminated Centers for Disease Control and Prevention's (CDC) funding for gun research. In this study, we examined newspaper coverage of three mass shootings that took place over a 20-year period before and after the passage of this budget rider. We found that sources and frames provided by news media to contextualize gun violence shifted markedly over time, progressing from episodic and individual-level frames to broader thematic societal-level concerns, with increased discussion of mental health but limited discourse explicitly related to public health...
August 25, 2017: Health Communication
https://www.readbyqxmd.com/read/28828276/pyrrolizidine-alkaloid-variation-in-senecio-vulgaris-populations-from-native-and-invasive-ranges
#14
Dandan Cheng, Viet-Thang Nguyen, Noel Ndihokubwayo, Jiwen Ge, Patrick P J Mulder
Biological invasion is regarded as one of the greatest environmental problems facilitated by globalization. Some hypotheses about the invasive mechanisms of alien invasive plants consider the plant-herbivore interaction and the role of plant defense in this interaction. For example, the "Shift Defense Hypothesis" (SDH) argues that introduced plants evolve higher levels of qualitative defense chemicals and decreased levels of quantitative defense, as they are released of the selective pressures from specialist herbivores but still face attack from generalists...
2017: PeerJ
https://www.readbyqxmd.com/read/28801737/how-is-light-interception-efficiency-related-to-shoot-structure-in-tall-canopy-species
#15
Noriyuki Osada, Tsutom Hiura
Coexistence of multiple species is a fundamental aspect of plant and forest ecology. Although spatial arrangement of leaves within crowns is an important determinant of light interception and productivity, shoot structure varies considerably among coexisting canopy species. We investigated the relative importance of structural traits in determining the light availability of leaves (I) and light interception efficiency at the current-year shoot level (LIECS; the total light interception of leaves divided by shoot biomass) at the top of crowns of 11 canopy species in a cool-temperate forest in Japan...
August 11, 2017: Oecologia
https://www.readbyqxmd.com/read/28800365/the-impact-of-the-orlando-mass-shooting-on-fear-of-victimization-and-gun-purchasing-intentions-not-what-one-might-expect
#16
Wolfgang Stroebe, N Pontus Leander, Arie W Kruglanski
Mass public shootings are typically followed by a spike in gun sales as well as calls for stricter gun control laws. What remains unclear is whether the spike in gun sales is motivated by increased threat perceptions or by concerns about gun control, or whether the sales are mainly driven by non-owners purchasing guns or gun owners adding to their collection. Two surveys of gun owners and non-owners, conducted immediately before and after the Orlando shooting, allowed us to assess its impact on threat perceptions and on gun-purchasing intentions...
2017: PloS One
https://www.readbyqxmd.com/read/28794929/high-frequency-direct-shoot-organogenesis-of-leaf-explants-and-a-comparative-evaluation-of-phytochemicals-antioxidant-potential-of-wild-vs-in-vitro-plant-extracts-of-lysimachia-laxa
#17
Sanjoy Gupta, Tapan Seal, A A Mao, Soneswar Sarma
The present studies were attempted to develop direct shoot organogenesis from in vitro grown leaf explants of Lysimachia laxa and comparative evaluation of phytochemical and antioxidant potential of in vitro raised and wild plants extracts. The fresh leaves of this species are used for deworming gastrointestinal worm infection in traditional medicine. Overexploitation of this species and poor regeneration has led to rapid decline in wild population, therefore, present investigation was attempted to develop an efficient rapid mass propagation protocol for this species...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28781134/psychological-effect-of-a-mass-casualty-event-on-general-surgery-residents
#18
William S Havron, Karen Safcsak, Joshua Corsa, Andrew Loudon, Michael L Cheatham
OBJECTIVE: To evaluate the psychological effect of a mass casualty shooting event on general surgery residents. DESIGN: Three and 7 months following the Pulse nightclub mass casualty shooting, the mental well-being of general surgery residents employed at the receiving institution was evaluated. A voluntary and anonymous screening questionnaire for posttraumatic stress disorder (PTSD) and major depression (MD) was administered. Responses were stratified into 2 groups; residents who worked (ON-CALL) and residents who did not work (OFF-CALL) the night of the event...
August 3, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28780690/engineered-silica-nanoparticles-alleviate-the-detrimental-effects-of-na-stress-on-germination-and-growth-of-common-bean-phaseolus-vulgaris
#19
Abdullah H Alsaeedi, Hassan El-Ramady, Tarek Alshaal, Mohamed El-Garawani, Nevien Elhawat, Mahdi Almohsen
During the past 10 years, exploiting engineered nanoparticles in agricultural sector has been rapidly increased. Nanoparticles are used to increase the productivity of different crops particularly under biotic and abiotic stresses. This study aims to test the ability of nanosilica (NS) to ameliorate the detrimental impact of Na(+) with different concentrations on the seed germination and the growth of common bean seedlings. Five doses of Na(+) have been prepared from NaCl, i.e., 1000, 2000, 3000, 4000, and 5000 mg L(-1), and distilled water was applied as a control...
August 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28774638/mangrove-endophyte-promotes-reforestation-tree-acacia-polyphylla-growth
#20
Renata Assis Castro, Manuella Nóbrega Dourado, Jaqueline Raquel de Almeida, Paulo Teixeira Lacava, André Nave, Itamar Soares de Melo, João Lucio de Azevedo, Maria Carolina Quecine
Mangroves are ecosystems located in the transition zone between land and sea that serve as a potential source of biotechnological resources. Brazil's extensive coast contains one of the largest mangrove forests in the world (encompassing an area of 25,000km(2) along all the coast). Endophytic bacteria were isolated from the following three plant species: Rhizophora mangle, Laguncularia racemosa and Avicennia nitida. A large number of these isolates, 115 in total, were evaluated for their ability to fix nitrogen and solubilize phosphorous...
July 19, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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