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https://www.readbyqxmd.com/read/28206876/sample-treatment-in-pesticide-residue-determination-in-food-by-high-resolution-mass-spectrometry-are-generic-extraction-methods-the-end-of-the-road
#1
Roberto Romero-González, Francisco Javier Arrebola Liébanas, Rosalía López-Ruiz, Antonia Garrido Frenich
The use of high-resolution MS (HRMS) is becoming popular in laboratories for the determination of pesticide residues in food commodities. The recent improvements in the instrumentation have helped to increase the number of active compounds and transformation products that can be monitored within a simple chromatographic run. However, prior to instrumental determination, it is necessary to perform a nonspecific, or generic, sample treatment that allows the efficient extraction of several compounds with very relevant differences in their physical and chemical properties...
November 1, 2016: Journal of AOAC International
https://www.readbyqxmd.com/read/28189071/blood-lead-levels-following-consumption-of-game-meat-in-italy
#2
Silvia Fustinoni, Sabrina Sucato, Dario Consonni, Pier Mannuccio Mannucci, Angelo Moretto
The aim of this study was to measure lead (Pb) levels in blood (Pb-blood) in consumers of game meat, taking into account other possible sources of lead exposure. A spot blood sample was obtained from 95 subjects, and a questionnaire was used to collect general information and data on game meat consumption, hunting, wine drinking and other possible sources of lead exposure. Pb-blood was measured by inductively coupled plasma-mass spectrometry. Pb-blood was not influenced by age, sex, residence in an urban or rural area, consumption of game meat, tobacco smoking or hobbies associated with potential exposure to lead, and median Pb-blood was 1...
February 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28179912/a-simple-rapid-method-for-determination-of-melatonin-in-plant-tissues-by-uplc-coupled-with-high-resolution-orbitrap-mass-spectrometry
#3
Tiantian Ye, Yan-Hong Hao, Lei Yu, Haitao Shi, Russel J Reiter, Yu-Qi Feng
Melatonin (MLT) was involved in regulating various stages of plant growth and development. However, due to the low concentration and complex matrixes of plant, the analysis of MLT is a challenging task. In this study, we developed a rapid and efficient method with simplified sample preparation by employing UPLC coupled with a high resolution Orbitrap mass spectrometry, and stable isotope-labeled MLT (MLT-d4) was first used as internal standard in the developed analytical method. In the developed method, we used one-step liquid-liquid extraction to purify the crude extracts both from shoot and root of rice for the analysis, which remarkably simplify the sample preparation process...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28160742/determination-of-rodenticides-and-related-metabolites-in-rabbit-liver-and-biological-matrices-by-liquid-chromatography-coupled-to-orbitrap-high-resolution-mass-spectrometry
#4
Marina López-García, Roberto Romero-González, Antonia Garrido Frenich
An analytical method based on ultra-high performance liquid chromatography (UHPLC) coupled to Orbitrap high resolution mass spectrometry was developed for the determination of rodenticides (bromadiolone, brodifacoum, difenacoum, chlorophacinone, diphacinone, coumachlor and warfarin) in liver matrix. Different extraction conditions were tested, obtaining the best results when the "dilute and shoot" method (acidified acetonitrile as extraction solvent) and a clean-up step with primary secondary amine (PSA) were used...
January 28, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28153402/assessment-of-biotransfer-and-bioaccumulation-of-cadmium-lead-and-zinc-from-fly-ash-amended-soil-in-mustard-aphid-beetle-food-chain
#5
Mudasir Irfan Dar, Iain D Green, Mohd Irfan Naikoo, Fareed Ahmad Khan, Abid Ali Ansari, Mohd Iqbal Lone
The present study investigates the extent of biotransfer and bioaccumulation of cadmium (Cd), lead (Pb) and zinc (Zn) from fly ash amended soil in mustard (Brassica juncea)-aphid (Lipaphis erysimi)-beetle (Coccinella septempunctata) food chain and its subsequent implications for the beetle. The soil was amended with fly ash at the rates of 0, 5, 10, 20 and 40% (w/w). Our results showed that the uptake of Cd, Pb and Zn from soil to mustard root increased with the increase in fly ash application rates, but their root to shoot translocation was relatively restricted...
January 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28149209/performance-outcomes-after-metacarpal-fractures-in-national-basketball-association-players
#6
Michael S Guss, John P Begly, Austin J Ramme, Richard M Hinds, Raj J Karia, John T Capo
Background: The aim was to determine whether players in the National Basketball Association (NBA) who sustain metacarpal fractures demonstrate decreased performance upon return to competition when compared with their performance before injury and that of their control-matched peers. Methods: Data for 32 NBA players with metacarpal fractures incurred over 11 seasons (2002-2003 to 2012-2013) were obtained from injury reports, press releases, and player profiles (www.nba.com and www.basketballreference.com). Player age, body mass index (BMI), position, shooting hand, number of years in the league, and treatment (surgical vs nonsurgical) were recorded...
December 2016: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28148311/special-considerations-for-mass-violence-events-in-senior-living-facilities-a-case-report-on-the-pinelake-health-and-rehab-center-shooting
#7
Cody Martin, David Powell
The 2009 Pinelake Health and Rehab Center shooting in Carthage, North Carolina, presents a unique case study for examining the specific considerations for mass violence events in senior living facilities. A variety of factors, including reduced sensory perception, reduced mobility, and cognitive decline, may increase the vulnerability of the populations of senior living facilities during mass violence events. Management of response aspects such as evacuation, relocation, and reunification also require special consideration in the context of mass violence at senior living facilities...
February 2, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/28124241/protocol-for-extraction-and-isolation-of-brassinosteroids-from-plant-tissues
#8
Danuše Tarkowská, Miroslav Strnad
Brassinosteroids (BRs) are a class of steroid plant hormones that participate with other plant hormones in the regulation of numerous developmental processes, including root and shoot growth, vascular differentiation, fertility, and seed germination. A characteristic feature of all plant hormones, including BRs, is that their concentration is extremely low in plant tissues and, therefore, the methods dealing with their determination belong to ultra-trace analysis, for which very sensitive analytical tools are needed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28121724/a-rapid-method-for-quantification-of-242pu-in-urine-using-extraction-chromatography-and-icp-ms
#9
Athena Marie Gallardo, Chit Than, Carolyn Wong, Ralf Sudowe
Occupational exposure to plutonium is generally monitored through analysis of urine samples. Typically, plutonium is separated from the sample and other actinides, and the concentration is determined using alpha spectroscopy. Current methods for separations and analysis are lengthy and require long count times. A new method for monitoring occupational exposure levels of plutonium has been developed, which requires fewer steps and overall less time than the alpha spectroscopy method. In this method, the urine is acidified, and a Pu internal standard is added...
March 2017: Health Physics
https://www.readbyqxmd.com/read/28120671/citizenaid
#10
(no author information available yet)
CitizenAID is an easy-to-use app that informs users how to provide care in mass casualty situations, including shootings, knife attacks and bomb incidents. The authors are well known and respected specialists in trauma care and disaster management.
January 25, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28117321/metabolite-profiles-in-various-plant-organs-of-justicia-gendarussa-burm-f-and-its-in-vitro-cultures
#11
Putu Indrayoni, Diah Intan Purwanti, Suwidji Wongso, Bambang E W Prajogo, Gunawan Indrayanto
Metabolite profiles of plant organs and their in vitro cultures of Justicia gendarussa have been studied by using Ultra Performance Liquid Chromatography-Quadrupole Time-of-Flight-Mass Spectrometry (UPLC-Qtof-MS). Samples of leaves, stems, roots, and shoot cultures showed similar patterns of metabolites, while samples of root cultures gave very different profiles. Concentrations of secondary metabolites in shoot cultures were relatively low compared to those in the leaves and roots of the plants. The results suggested that secondary metabolites in J...
April 13, 2016: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28112063/induction-of-resistance-of-corn-plants-to-spodoptera-frugiperda-j-e-smith-1797-lepidoptera-noctuidae-by-application-of-silicon-and-gibberellic-acid
#12
R Alvarenga, J C Moraes, A M Auad, M Coelho, A M Nascimento
The aim of this study was to evaluate the effects of silicon application and administration of the phytohormone gibberellic acid on resistance of the corn plants to the fall armyworm (FAW), Spodoptera frugiperda, and their vegetative characteristics. We evaluated larval and pupal duration, survival and biomass, and adult longevity, malformation and fecundity of S. frugiperda after feeding on plant matter treated with silicon and/or gibberellic acid. The feeding preference of FAW first-instar larvae, the total leaf area consumed by the insects, and the vegetative parameters of corn plants were also evaluated...
January 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28106834/heat-stress-decreases-levels-of-nutrient-uptake-and-assimilation-proteins-in-tomato-roots
#13
Anju Giri, Scott Heckathorn, Sasmita Mishra, Charles Krause
Global warming will increase root heat stress, which is already common under certain conditions. Effects of heat stress on root nutrient uptake have rarely been examined in intact plants, but the limited results indicate that heat stress will decrease it; no studies have examined heat-stress effects on the concentration of nutrient-uptake proteins. We grew Solanum lycopersicum (tomato) at 25 °C/20 °C (day/night) and then transferred some plants for six days to 35 °C /30 °C (moderate heat) or 42 °C/37 °C (severe heat) (maximum root temperature = 32 °C or 39 °C, respectively); plants were then moved back to control conditions for seven days to monitor recovery...
January 19, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28103074/mass-shootings-the-role-of-the-media-in-promoting-generalized-imitation
#14
James N Meindl, Jonathan W Ivy
Mass shootings are a particular problem in the United States, with one mass shooting occurring approximately every 12.5 days. Recently a "contagion" effect has been suggested wherein the occurrence of one mass shooting increases the likelihood of another mass shooting occurring in the near future. Although contagion is a convenient metaphor used to describe the temporal spread of a behavior, it does not explain how the behavior spreads. Generalized imitation is proposed as a better model to explain how one person's behavior can influence another person to engage in similar behavior...
March 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28103071/bridging-the-response-to-mass-shootings-and-urban-violence-exposure-to-violence-in-new-haven-connecticut
#15
Alycia Santilli, Kathleen O'Connor Duffany, Amy Carroll-Scott, Jordan Thomas, Ann Greene, Anita Arora, Alicia Agnoli, Geliang Gan, Jeannette Ickovics
We have described self-reported exposure to gun violence in an urban community of color to inform the movement toward a public health approach to gun violence prevention. The Community Alliance for Research and Engagement at Yale School of Public Health conducted community health needs assessments to document chronic disease prevalence and risk, including exposure to gun violence. We conducted surveys with residents in six low-income neighborhoods in New Haven, Connecticut, using a neighborhood-stratified, population-based sample (n = 1189; weighted sample to represent the neighborhoods, n = 29 675)...
March 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28055247/-staging-of-breast-cancer-and-the-advanced-applications-of-digital-mammogram-what-the-physician-needs-to-know
#16
Maha Hussien Helal, Sahar Mahmoud Mansour, Mai Zaglol, Lamia Adel Salaleldin, Omniya Mokhtar Nada, Marwa Anas Haggag
OBJECTIVE: To study the role of advanced applications of digital mammogram whether contrast enhanced spectral mammography (CESM) or digital breast tomosynthesis (DBT) in the "T" staging of histologically proven breast cancer prior management planning. METHODS: This prospective analysis, we evaluated 98 proved malignant breast masses regarding their size, multiplicity and presence of associated clusters of microcalcifications. Evaluation methods included digital mammography, 3-D tomosynthesis and contrast enhanced spectral mammography...
January 5, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28054590/the-combined-effects-of-sediment-accretion-burial-and-nutrient-enrichment-on-the-growth-and-propagation-of-phalaris-arundinacea
#17
Xinsheng Chen, Yulin Liao, Yonghong Xie, Chao Wu, Feng Li, Zhengmiao Deng, Xu Li
Sediment accretion (burial) and nutrient enrichment occur concurrently in lacustrine wetlands, but the role of these two aspects of sedimentation on macrophyte performance has rarely been examined. Here, we investigated the concurrent effects of sediment accretion and nutrient enrichment on the growth and propagation of Phalaris arundinacea L. using a factorial sediment burial by nutrient addition experimental design. Regardless of burial depth, nutrient addition increased biomass accumulation, shoot mass ratio, the number of rhizomes, and the length of ramets and rhizomes...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28013275/structures-of-bordered-pits-potentially-contributing-to-isolation-of-a-refilled-vessel-from-negative-xylem-pressure-in-stems-of-morus-australis-poir-testing-of-the-pit-membrane-osmosis-and-pit-valve-hypotheses
#18
Hiroki Ooeda, Ichiro Terashima, Haruhiko Taneda
Two hypotheses have been proposed to explain the mechanism preventing the refilling vessel water from being drained to the neighboring functional vessels under negative pressure. The pit-membrane-osmosis hypothesis proposes that the xylem parenchyma cells release polysaccharides that are impermeable to the intervessel pit membranes into the refilling vessel; this osmotically counter-acts the negative pressure, thereby allowing the vessel to refill. The pit-valve hypothesis proposes that gas trapped within intervessel bordered pits isolates the refilling vessel water from the surrounding functional vessels...
December 23, 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28012661/off-site-transport-of-nitrogen-fertilizer-with-runoff-from-golf-course-fairway-turf-a-comparison-of-creeping-bentgrass-with-a-fine-fescue-mixture
#19
Pamela J Rice, Brian P Horgan
Maintaining quality golf course turf often requires irrigation and application of fertilizer. The transport of excess nutrients with runoff water from highly managed and fertilized biological systems to surrounding surface waters has been shown to result in enhanced algal blooms and promotion of eutrophication. Environmental stewardship includes looking for new approaches to reduce adverse environmental impacts of current practices. One strategy is to replace traditional turfgrass with low-maintenance turfgrass species...
December 21, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28008648/evaluating-the-effects-of-triclosan-on-three-field-crops-grown-in-four-formulations-of-biosolids
#20
René S Shahmohamadloo, Linda Lissemore, Ryan S Prosser, Paul K Sibley
A growing body of evidence suggests that amending soil with biosolids can be an integral component of sustainable agriculture. Despite strong evidence supporting its beneficial use in agriculture, there are concerns that chemicals, such as pharmaceuticals and personal care products (PPCPs), could present a risk to terrestrial ecosystems and human health. Triclosan (TCS) is one of the most commonly detected compounds in biosolids. To date, laboratory studies indicate that TCS likely poses a de minimis risk to field crops; however, these studies were either conducted under unrealistic exposure conditions or only assessed one or two formulations of biosolids...
December 23, 2016: Environmental Toxicology and Chemistry
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