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https://www.readbyqxmd.com/read/28088547/traffic-related-trace-elements-in-soils-along-six-highway-segments-on-the-tibetan-plateau-influence-factors-and-spatial-variation
#1
Guanxing Wang, Chen Zeng, Fan Zhang, Yili Zhang, Christopher A Scott, Xuedong Yan
The accumulation of traffic-related trace elements in soil as the result of anthropogenic activities raises serious concerns about environmental pollution and public health. Traffic is the main source of trace elements in roadside soil on the Tibetan Plateau, an area otherwise devoid of industrial emissions. Indeed, the rapid development of tourism and transportation in this region means it is becoming increasingly important to identify the accumulation levels, influence distance, spatial distribution, and other relevant factors influencing trace elements...
January 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28087056/extraction-chromatographic-separations-of-tantalum-and-tungsten-from-hafnium-and-complex-matrix-constituents
#2
Mathew S Snow, Martha R Finck, Kevin P Carney, Samuel S Morrison
Tantalum (Ta), hafnium (Hf), and tungsten (W) analyses from complex matrices require high purification of these analytes from each other and major/trace matrix constituents, however, current state-of-the-art Ta/Hf/W separations rely on traditional anion exchange approaches that show relatively similar distribution coefficient (Kd) values for each element. This work reports an assessment of three commercially available extraction chromatographic resins (TEVA, TRU, and UTEVA) for Ta/Hf/W separations. Batch contact studies show differences in Ta/Hf and Ta/W Kd values of up to 10(6) and 10(4) (respectively), representing an improvement of a factor of 100 and 300 in Ta/Hf and Ta/W Kd values (respectively) over AG1×4 resin...
January 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28081241/cd25-cd127-foxp3-cells-represent-a-major-subpopulation-of-cd8-t-cells-in-the-eye-chambers-of-normal-mice
#3
Tomasz Maślanka, Natalia Ziółkowska, Hubert Ziółkowski, Joanna Małaczewska
The aim of this study has been to determine whether eye chambers constitute part of the normal migratory pathway of naive CD4+ and CD8+ T cells in mouse and if natural CD4+CD25+Foxp3+ and CD8+CD25+Foxp3+ regulatory T cells are present within these eye compartments. To this aim, the cells obtained from aqueous humor (AH) of normal mice were phenotyped in terms of the expression CD4, CD8, CD25, CD127 and transcription factor Foxp3. The mean percentage of CD8+ T cells in the total AH lymphocyte population was as high as 28...
2017: PloS One
https://www.readbyqxmd.com/read/28078814/life-threatening-nutritional-deficiencies-in-a-dialysis-patient
#4
Fahad Aziz, Kunal Chaudhary
Nutritional deficiencies are very common among the patient on chronic hemodialysis. But they can be easily overlooked or misdiagnosed. Deficiencies of trace elements and phosphorous is rare among this patient population but if neglected can lead to catastrophic effects. We describe a case report of a patient with ESRD recently started on outpatient maintenance hemodialysis, who presented with life threatening muscular weakness with respiratory failure requiring prolonged mechanical ventilation. On initial workup, it was unclear what the cause of her weakness was, however, further investigations showed undetectable phosphorous levels as well as very low levels of trace elements...
January 11, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28078431/degradation-of-di-2-ethylhexyl-phthalate-by-a-novel-gordonia-alkanivorans-strain-yc-rl2
#5
Ruth Nahurira, Lei Ren, Jinlong Song, Yang Jia, Junhuan Wang, Shuanghu Fan, Haisheng Wang, Yanchun Yan
One bacterial strain, YC-RL2, isolated from petroleum-contaminated soil, could utilize environmental hormone Di(2-Ethylhexyl) phthalate (DEHP) as a sole carbon source for growth. Strain YC-RL2 was identified as Gordonia alkanivorans by 16S rRNA gene analysis and Biolog tests. The effects of environmental factors which might affect the degrading process were optimized at 30 °C and pH 8.0. Strain YC-RL2 showed superior halotolerance and could tolerate up to 0-5% NaCl in trace element medium supplemented with DEHP, although the DEHP degradation rates slowed as NaCl concentration increased...
January 12, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28077709/semantic-congruence-accelerates-the-onset-of-the-neural-signals-of-successful-memory-encoding
#6
Pau A Packard, Antoni Rodríguez-Fornells, Nico Bunzeck, Berta Nicolás, Ruth de Diego-Balaguer, Lluís Fuentemilla
: As the stream of experience unfolds, our memory system rapidly transforms current inputs into long-lasting meaningful memories. A putative neural mechanism that strongly influences how input elements are transformed into meaningful memory codes relies on the ability to integrate them with existing structures of knowledge or schemas. However, it is not yet clear whether schema-related integration neural mechanisms occur during online encoding. In the current investigation, we examined the encoding-dependent nature of this phenomenon in humans...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28075127/homeomorphic-isomerization-as-a-design-element-in-con-tainer-molecules-binding-displacement-and-selective-transport-of-mcl2-species-m-pt-pd-ni
#7
Sugam Kharel, Hemant Joshi, Stephen Bierschenk, Michael Stollenz, Deeb Taher, Nattamai Bhuvanesh, John A Gladysz
The dibridgehead diphosphine P((CH2)14)3P (1) can rapidly turn itself inside-out (homeomorphic isomerization) to give a mixture of in,in and out,out isomers. The exo directed lone pairs in the latter are able to scavenge Lewis acidic MCl2; cage like adducts of the in,in isomer, trans-MCl2(P((CH2)14)3P) (M = 2/Pt, 3/Pd, 4/Ni), then form. The NiCl2 unit in 4 (which is crystallographically characterized) may be replaced by PtCl2 or PdCl2, but 2 and 3 do not give similar substitutions. U-tubes are charged with CH2Cl2 solutions of 1 (lower phase), an aqueous solution of K2MCl4 (charging arm; M = Pt, Pd), and an aqueous solution of excess KCl (receiving arm)...
January 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28073813/association-between-the-healthy-eating-index-2010-and-nutrient-and-energy-densities-of-german-households-food-purchases
#8
Jonas Peltner, Silke Thiele
BACKGROUND: The USDA Healthy Eating Index (HEI) is used widely to measure diet quality because it allows a number of different applications. Although several evaluations of the HEI-2010 have already been carried out, there is lack of those which focus on associations between the HEI and nutrient intakes. This study updates and expands upon previous findings on these associations. METHODS: Using German consumption data, where ∼12 million purchases from 13 131 households are recorded, HEI-2010 total and individual scores, as well as several energy and nutrient densities were calculated...
January 9, 2017: European Journal of Public Health
https://www.readbyqxmd.com/read/28073642/long-term-impact-of-primary-domestic-sewage-on-metal-loid-accumulation-in-drainage-ditch-sediments-plants-and-water-implications-for-phytoremediation-and-restoration
#9
Mathieu Nsenga Kumwimba, Bo Zhu, Fidèle Suanon, Diana Kavidia Muyembe, Mawuli Dzakpasu
We evaluate the long-term performance of a vegetated drainage ditch (VDD) treating domestic sewage with respect to heavy metal/metalloid (HM/M) accumulation in sediments, plants and water. VDD sediment contained significantly higher macro and trace elements compared to an agricultural ditch (AD) sediment. However, concentrations of HM/Ms in VDD sediment were below the ranges considered toxic to plants. Most HM/Ms were efficiently removed in the VDD, whereby removal efficiencies varied between 11% for Al and 89% for K...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28073603/relationship-between-serum-selenium-sociodemographic-variables-other-trace-elements-and-lipid-profile-in-an-adult-spanish-population
#10
Montserrat González-Estecha, Irene Palazón-Bru, Andrés Bodas-Pinedo, Elena Trasobares, Antonio Palazón-Bru, Manuel Fuentes, M Ángeles Cuadrado-Cenzual, Elpidio Calvo-Manuel
INTRODUCTION: Several studies have shown an inverse relationship between selenium status and cardiovascular health, although epidemiologic evidence yielded by the randomized trials did not find a beneficial effect of selenium administration. The aim of this study was to analyze the association between serum selenium levels and lipid profile adjusted by age, sex and other associated factors among a general adult population in Spain. MATERIALS AND METHODS: We recruited 372 hospital employee volunteers (60 men and 312 women) with a mean age of 47 (SD: 10...
January 3, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28073602/report-on-the-6th-international-festem-symposium-on-new-horizons-on-trace-elements-and-minerals-role-in-human-and-animal-health-catania-sicily-italy-may-26-28th-2016
#11
EDITORIAL
Paola Borella, Bernhard Michalke
No abstract text is available yet for this article.
December 19, 2016: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28073264/metal-organic-polyhedra-coated-si-nanowires-for-the-sensitive-detection-of-trace-explosives
#12
Anping Cao, Wei Zhu, Jin Shang, Johan H Klootwijk, Ernst J R Sudhölter, Jurriaan Huskens, Louis C P M de Smet
Surface-modified silicon nanowire-based field-effect transistors (SiNW-FETs) have proven to be a promising platform for molecular recognition in miniature sensors. In this work, we present a novel nanoFET device for the sensitive and selective detection of explosives based on affinity layers of metal-organic polyhedra (MOPs). The judicious selection of the geometric and electronic characteristics of the assembly units (organic ligands and unsaturated metal site) embedded within the MOP cage allowed for the formation of multiple charge-transfer (CT) interactions to facilitate the selective explosive inclusion...
January 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28071021/the-effect-of-alcohol-consumption-on-maternal-and-cord-blood-electrolyte-and-trace-element-levels
#13
Anatoly V Skalny, Elena S Berezkina, Elena V Kiyaeva, Inara E Alidzhanova, Andrew R Grabeklis, Alexey A Tinkov
BACKGROUND: Earlier studies demonstrated that alcoholism significantly alters electrolyte and trace element homeostasis. However, the existing data on the interplay between maternal alcohol consumption and fetal trace element status are contradictory. Therefore, the primary objective of the present study was to assess the influence of alcohol consumption on maternal and cord blood trace elements. METHODS: A total of 30 pregnant women (15 women consuming alcohol and 15 controls) were examined...
October 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28070864/factors-that-affect-the-content-of-cadmium-nickel-copper-and-zinc-in-tissues-of-the-knee-joint
#14
Wojciech Roczniak, Barbara Brodziak-Dopierała, Elżbieta Cipora, Agata Jakóbik-Kolon, Joanna Kluczka, Magdalena Babuśka-Roczniak
Osteoarthritis causes the degradation of the articular cartilage and periarticular bones. Trace elements influence the growth, development and condition of the bone tissue. Changes to the mineral composition of the bone tissue can cause degenerative changes and fractures. The aim of the research was to determine the content of cadmium (Cd), nickel (Ni), copper (Cu) and zinc (Zn) in the tibia, the femur and the meniscus in men and women who underwent a knee replacement surgery. Samples were collected from 50 patients, including 36 women and 14 men...
January 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28070811/encaged-chironomus-riparius-larvae-in-assessment-of-trace-metal-bioavailability-and-transfer-in-a-landfill-leachate-collection-pond
#15
Frédéric Gimbert, Quentin Petitjean, Ahmed Al-Ashoor, Céline Cretenet, Lotfi Aleya
Household wastes may constitute a vector of environmental contamination when buried, in particular through degradation and production of leachates containing significant trace metal (TM) concentrations that may constitute a serious risk to biota. The objectives of this study were to assess the bioavailability and transfer potential of various TMs present in water and sediments in a reservoir receiving landfill leachates. An active biomonitoring approach was adopted consisting of exposing naive laboratory organisms in cages deployed in the field...
January 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28070810/trace-element-concentrations-in-muscle-tissue-of-milk-shark-rhizoprionodon-acutus-from-the-persian-gulf
#16
Milad Adel, Kolsoom Mohammadmoradi, Cesar P Ley-Quiñonez
We analyze the heavy metals concentrations in muscle samples of milk shark (Rhizoprionodon acutus) from Persian Gulf. The metals distribution was Zn > Cu > Pb > Cd > Hg. No statistical differences were observed among size or weight by sex (p < 0.05). Metals concentrations in the population de R. acutus from Larak and Lavan islands are homogeneous along the coastal study area. Our study suggest that the results reflect the natural contents of trace metals in this species, and the health risk associated to milk shark consumption in Persian Gulf is relatively low...
January 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28070530/trace-elements-status-in-sera-of-patients-with-allergic-asthma
#17
Ariaee Nazila, Farid Reza, Shabestari Fahimeh, Shabestari Mohamad, Jabbari Azad Farahzad
BACKGROUND: Asthma is a multifactorial disease and its severity varies with the inflammatory grade. There are conflicting reports about the roles of trace elements in asthma. This study examined the effects of zinc (Zn), copper (Cu), and selenium (Se) concentrations in sera of patients with allergic asthma attending Ghaem Hospital, Mashhad, Iran. METHODS: Forty-nine patients, aged 10 to 50 years, with asthma in moderate or severe stages, and 24 healthy controls, were enrolled in this study...
October 2016: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28070312/investigation-of-nutritional-properties-of-three-species-of-marine-turban-snails-for-human-consumption
#18
Roslizawati Ab Lah, Joshua Smith, Dale Savins, Ashley Dowell, Daniel Bucher, Kirsten Benkendorff
Turban snails (family Turbinidae) are gastropod molluscs that are harvested for human consumption yet little is known about the nutritional properties of these snails, particularly from Australian waters. This study compares the proximate composition (ash, moisture, protein, and lipid content), fatty acid profiles, mineral, and trace element content of three species of turbinid snails; Turbo militaris, Lunella undulata, and Lunella torquata from northern New South Wales, Australia. They were all found to have relatively high protein in their flesh (16...
January 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28070112/selenium-uptake-through-cystine-transporter-mediated-by-glutathione-conjugation
#19
Takao Tobe, Koji Ueda, Akira Aoki, Yoshinori Okamoto, Nakao Kojima, Hideto Jinno
Selenium (Se) is an essential trace element and is regarded as a protective agent against cancer. In particular, antioxidant effects of selenoenzymes contribute to cancer prevention. Se can also produce reactive oxygen species and, thereby, exert cancer-selective cytotoxicity. Selenodiglutathione (SDG) is a primary Se metabolite conjugated to two glutathione (GSH) moieties. SDG increases intracellular Se accumulation and is more toxic than selenous acid (H2SeO3), but the mechanisms for importing Se compounds into cells are not fully understood...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28069278/trace-element-compartmentation-in-the-seagrass-posidonia-oceanica-and-biomonitoring-applications
#20
Giuseppe Bonanno, Vincenzo Di Martino
This study investigated the trace element bioaccumulation capacity of the Mediterranean seagrass Posidonia oceanica, and its suitability as a bioindicator of contamination in water and sediments. Results showed that P. oceanica leaves accumulate higher concentrations of Ni and Zn. Since P. oceanica regenerates its leaves periodically, the higher concentrations in aerial organs may suggest a "removal" strategy according to which P. oceanica accumulates greater concentrations of trace elements in its temporary organs...
January 6, 2017: Marine Pollution Bulletin
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