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https://www.readbyqxmd.com/read/28340386/constructed-ils-coated-porous-magnetic-nickel-cobaltate-hexagonal-nanoplates-sensing-materials-for-the-simultaneous-detection-of-cumulative-toxic-metals
#1
Yuanyuan Dong, Lei Zhang
The different morphologies of magnetic nickel cobaltate (NiCo2O4) electrocatalysts, consisting of nanoparticles (NiCo2O4-N), nanoplates (NiCo2O4-P) and microspheres (NiCo2O4-S) were fabricated. It was found that the electrocatalytic properties of the sensing materials were strongly dependent on morphology and specific surface area. The porous NiCo2O4 hexagonal nanoplates coupled with ILs as modified materials (ILs@NiCo2O4-P) for the simultaneous determination of thallium (Tl(+)), lead (Pb(2+)) and copper (Cu(2+)), exhibited high sensitivity, long-time stability and good repeatability...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28334667/redox-controlled-release-dynamics-of-thallium-in-periodically-flooded-arable-soil
#2
Svetlana Antić-Mladenović, Tina Frohne, Mirjana Kresović, Hans-Joachim Stärk, Dubravka Savić, Vlado Ličina, Jörg Rinklebe
To our knowledge, this is the first work to mechanistically study the impact of the redox potential (EH) and principal factors, such as pH, iron (Fe), manganese (Mn), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), chlorides (Cl(-)) and sulfates (SO4(2-)), on the release dynamics of thallium (Tl) in periodically flooded soil. We simulated flooding using an automated biogeochemical microcosm system that allows for systematical control of pre-defined redox windows. The EH value was increased mechanistically at intervals of approximately 100 mV from reducing (-211 mV) to oxidizing (475 mV) conditions...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28330986/diffusion-or-advection-mass-transfer-and-complex-boundary-layer-landscapes-of-the-brown-alga-fucus-vesiculosus
#3
Mads Lichtenberg, Rasmus Dyrmose Nørregaard, Michael Kühl
The role of hyaline hairs on the thallus of brown algae in the genus Fucus is long debated and several functions have been proposed. We used a novel motorized set-up for two-dimensional and three-dimensional mapping with O2 microsensors to investigate the spatial heterogeneity of the diffusive boundary layer (DBL) and O2 flux around single and multiple tufts of hyaline hairs on the thallus of Fucus vesiculosus. Flow was a major determinant of DBL thickness, where higher flow decreased DBL thickness and increased O2 flux between the algal thallus and the surrounding seawater...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28321702/association-between-level-of-urinary-trace-heavy-metals-and-obesity-among-children-aged-6-19%C3%A2-years-nhanes-1999-2011
#4
Wentao Shao, Qian Liu, Xiaowei He, Hui Liu, Aihua Gu, Zhaoyan Jiang
Global prevalence of obesity has been increasing dramatically in all ages. Although traditional causes for obesity development have been studied widely, it is unclear whether environmental exposure of substances such as trace heavy metals affects obesity development among children and adolescents so far. Data from the National Health and Nutrition Examination Survey (1999-2011) were retrieved, and 6602 US children were analyzed in this study. Urinary level of nine trace heavy metals, including barium, cadmium, cobalt, cesium, molybdenum, lead, antimony, thallium, and tungsten, was analyzed for their association with the prevalence of obesity among children aged 6-19 years...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28296214/morphological-secondary-metabolite-and-its-rdna-variability-within-usnic-acid-containing-lichen-thalli-of-the-genus-xanthoparmelia-explored-at-the-local-scale-of-rock-outcrop-in-western-italian-alps
#5
Enrica Matteucci, Andrea Occhipinti, Rosanna Piervittori, Massimo E Maffei, Sergio E Favero-Longo
Lichen secondary metabolites (LSMs) are regarded with interest for valuable biological properties, but chemical variability among/within lichen taxa has been only fragmentarily characterized by advanced analytical techniques. Knowledge of variability at a local geographic scale has been particularly neglected, while it should address the collection of chemically homogeneous materials to test and exploit LSMs. Here we evaluated the chemical variability of 48 Xanthoparmelia specimens from two rock outcrops in Western Italian Alps, representative of nine morphotypes and sixteen rDNA ITS haplotypes...
March 11, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28293748/assessing-trace-metal-contamination-and-organic-matter-in-the-brackish-lakes-as-the-major-source-of-potable-water
#6
Vlado Cuculić, Neven Cukrov, Željko Kwokal, Slađana Strmečki, Marta Plavšić
On small and medium karstic coastal islands in the Adriatic Sea, brackish lakes are often the only source of freshwater. Therefore, it is important to adequately evaluate the biogeochemical processes occurring in these complex water systems, as well as to determine the origin of contaminants present. In this study, the distribution and origin of trace metals (Tl, Hg, Cd, Pb, Cu, Zn, Ni, Co) and organic matter in the water column, sediment, and surrounding soil of the brackish lakes on Mljet Island, South Adriatic Sea, Croatia, were evaluated...
March 14, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28291791/three-dimensional-preservation-of-cellular-and-subcellular-structures-suggests-1-6-billion-year-old-crown-group-red-algae
#7
Stefan Bengtson, Therese Sallstedt, Veneta Belivanova, Martin Whitehouse
The ~1.6 Ga Tirohan Dolomite of the Lower Vindhyan in central India contains phosphatized stromatolitic microbialites. We report from there uniquely well-preserved fossils interpreted as probable crown-group rhodophytes (red algae). The filamentous form Rafatazmia chitrakootensis n. gen, n. sp. has uniserial rows of large cells and grows through diffusely distributed septation. Each cell has a centrally suspended, conspicuous rhomboidal disk interpreted as a pyrenoid. The septa between the cells have central structures that may represent pit connections and pit plugs...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28283527/corexit-9500-enhances-oil-biodegradation-and-changes-microbial-community-structure-of-oil-enriched-microcosms
#8
Stephen M Techtmann, Mobing Zhuang, Pablo Campo, Edith Holder, Michael Elk, Terry C Hazen, Robyn Conmy, Jorge W Santo Domingo
To better understand the impact of COREXIT 9500 on the structure and activity levels of hydrocarbon degrading microbial communities, we analyzed next-generation 16S rRNA gene sequencing libraries of hydrocarbon enrichments grown at 5 and 25 °C by using both DNA and RNA extracts as sequencing templates. Oil biodegradation patterns in both 5 and 25°C enrichments were consistent with those reported in the literature (i.e., aliphatics were degraded faster than aromatics). A slight increase in biodegradation was observed in the presence of COREXIT at both temperatures...
March 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28282250/easy-dacryocystorhinostomy-stent-fixation-and-removal-use-of-a-silicone-sleeve-and-external-stent-removal-from-the-medial-canthus
#9
Kaveh Vahdani, Vladimir Theodor Thaller, Giorgio Albanese
No abstract text is available yet for this article.
March 10, 2017: Orbit
https://www.readbyqxmd.com/read/28281074/toxic-effect-of-nonylphenol-on-the-marine-macroalgae-gracilaria-lemaneiformis-gracilariales-rhodophyta-antioxidant-system-and-antitumor-activity
#10
Mingqin Zhong, Pinghe Yin, Ling Zhao
The objective of the present work was to evaluate the toxic effect of nonylphenol (NP) on the antioxidant response and antitumor activity of Gracilaria lemaneiformis. An obvious oxidative damage was observed in this study. The thallus exposed to NP showed 1.2-2.0-fold increase in lipid peroxide and displayed a maximum level of 16.58 μmol g(-1) Fw on 0.6 mg L(-1) for 15-day exposure. The activities of antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT) enhanced significantly by 1.1-3...
March 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28270324/-imaging-methods-used-in-the-differential-diagnosis-between-brain-tumour-relapse-and-radiation-necrosis-after-stereotactic-radiosurgery-of-brain-metastases-literature-review
#11
I Menoux, J-P Armspach, G Noël, D Antoni
After stereotactic radiosurgery for a cerebral metastasis, one of the dreaded toxicities is radionecrosis. In the follow-up of these patients, it is impossible to distinguish radiation necrosis from tumour relapse either clinically or with MRI. In current practice, many imaging methods are designed such as special sequences of MRI (dynamic susceptibility contrast perfusion and susceptibility-weighted imaging, diffusion), proton magnetic resonance spectroscopy, positron emission tomography, or more seldom 201-thallium single-photon emission computerized tomography...
December 2016: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28268821/reconfigurable-hardware-software-codesign-methodology-for-protein-identification
#12
Venkateshwarlu Y Gudur, Sandeep Thallada, Abhinay R Deevi, Venkata Krishna Gande, Amit Acharyya, Vasundhra Bhandari, Paresh Sharma, Saqib Khursheed, Ganesh R Naik
In this paper we propose an on-the-fly reconfigurable hardware-software codesign based reconfigurable solution for real-time protein identification. Reconfigurable string matching is performed in the disciplines of protein identification and biomarkers discovery. With the generation of plethora of sequenced data and number of biomarkers for several diseases, it is becoming necessary to have an accelerated processing and on-the-fly reconfigurable system design methodology to bring flexibility to its usage in the medical science community without the need of changing the entire hardware every time with the advent of new biomarker or protein...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267671/high-sucrose-diet-induces-diabetic-like-phenotypes-and-oxidative-stress-in-drosophila-melanogaster-protective-role-of-syzygium-cumini-and-bauhinia-forficata
#13
Assis Ecker, Thallita Karla Silva do Nascimento Gonzaga, Rodrigo Lopes Seeger, Matheus Mulling Dos Santos, Julia Sepel Loreto, Aline Augusti Boligon, Daiane Francine Meinerz, Thiago Henrique Lugokenski, João Batista Teixeira da Rocha, Nilda Vargas Barbosa
Diet is a key component for development and longevity of organisms. Here, the fruit fly was used to evaluate the detrimental effects caused by consumption of high-sucrose diets (HSD), namely phenotypic responses linked to insulin signaling and oxidative stress. The protective effects of extracts from medicinal plants Syzygium cumini and Bauhinia forficata were investigated. HSD intake (15% and 30%) delayed the time to pupation and reduced the number of white pupae. In adult flies, the intake of diets was associated with mortality and increased levels of glucose+trehalose, triacylglycerols and hydrogen peroxide...
March 3, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28261162/critical-issues-in-mycobiota-analysis
#14
Bettina Halwachs, Nandhitha Madhusudhan, Robert Krause, R Henrik Nilsson, Christine Moissl-Eichinger, Christoph Högenauer, Gerhard G Thallinger, Gregor Gorkiewicz
Fungi constitute an important part of the human microbiota and they play a significant role for health and disease development. Advancements made in the culture-independent analysis of microbial communities have broadened our understanding of the mycobiota, however, microbiota analysis tools have been mainly developed for bacteria (e.g., targeting the 16S rRNA gene) and they often fall short if applied to fungal marker-gene based investigations (i.e., internal transcribed spacers, ITS). In the current paper we discuss all major steps of a fungal amplicon analysis starting with DNA extraction from specimens up to bioinformatics analyses of next-generation sequencing data...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28257469/photosynthetic-recovery-and-acclimation-to-excess-light-intensity-in-the-rehydrated-lichen-soil-crusts
#15
Li Wu, Yaping Lei, Shubin Lan, Chunxiang Hu
As an important successional stage and main type of biological soil crusts (BSCs) in Shapotou region of China (southeastern edge of Tengger Desert), lichen soil crusts (LSCs) often suffer from many stresses, such as desiccation and excess light intensity. In this study, the chlorophyll fluorescence and CO2 exchange in the rehydrated LSCs were detected under a series of photosynthetically active radiation (PAR) gradients to study the photosynthetic acclimation of LSCs. The results showed that although desiccation leaded to the loss of photosynthetic activity in LSCs, the fluorescence parameters including Fo, Fv and Fv/Fm of LSCs could be well recovered after rehydration...
2017: PloS One
https://www.readbyqxmd.com/read/28256312/thallium-rich-rust-scales-in-drinkable-water-distribution-systems-a-case-study-from-northern-tuscany-italy
#16
Cristian Biagioni, Massimo D'Orazio, Giovanni O Lepore, Francesco d'Acapito, Simone Vezzoni
Following the detection of a severe thallium contamination of the drinkable water from the public distribution system of Valdicastello Carducci-Pietrasanta (northern Tuscany, Italy), and the identification of the source of contamination in the Molini di Sant'Anna spring (average Tl content≈15μgL(-1)), the replacement of the contaminated water with a virtually Tl-free one (Tl<0.10μgL(-1)) caused an increase in Tl concentration in the drinkable water. This suggested that the pipeline interior had become a secondary source of Tl contamination, promoting its mineralogical and geochemical study...
February 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28255183/parametric-dose-standardization-for-optimizing-two-agent-combinations-in-a-phase-i-ii-trial-with-ordinal-outcomes
#17
Peter F Thall, Hoang Q Nguyen, Ralph G Zinner
A Bayesian model and design are described for a phase I-II trial to jointly optimise the doses of a targeted agent and a chemotherapy agent for solid tumors. A challenge in designing the trial was that both the efficacy and toxicity outcomes were defined as four-level ordinal variables. To reflect possibly complex joint effects of the two doses on each of the two outcomes, for each marginal distribution a generalised continuation ratio model was assumed, with each agent's dose parametrically standardised in the linear term...
January 2017: Journal of the Royal Statistical Society. Series C, Applied Statistics
https://www.readbyqxmd.com/read/28251567/fungal-succession-on-keratinous-hair-and-nail-baits-of-human-origin
#18
Sunita Mahariya, Meenakshi Sharma
Mycologically, succession is more precisely the sequential occupation of the same site by thalli (normally mycelia) either of different fungi or of different associations of fungi. For the study of fungal succession on hair bait, different soil samples were collected from different habitats of Jaipur. The fungal growth isolated from soil samples was observed macroscopically and microscopically for the appearance of fungi at regular interval of 15 days for more than 6 months. Regular microscopic examination of fungi of soil samples baited with hair showed a successional colonization of non-keratinophilic and keratinophilic fungi...
March 1, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28249906/nr4a3-suppresses-lymphomagenesis-through-induction-of-pro-apoptotic-genes
#19
Alexander Ja Deutsch, Beate Rinner, Martin Pichler, Katharina Troppan, Katrin Pansy, Marco Bischof, Karoline Fechter, Stefan Hatzl, Julia Feichtinger, Kerstin Wenzl, Marie-Therese Frisch, Verena Stiegelbauer, Andreas Prokesch, Anne Margrethe Krogsdam, Heinz Sill, Gerhard G Thallinger, Hildegard T Greinix, Chenguang Wang, Christine Beham-Schmid, Peter Neumeister
Nuclear orphan receptor NR4A1 exerts an essential tumor suppressor function in aggressive lymphomas. In this study, we investigated the hypothesized contribution of the related NR4A family member NR4A3 to lymphomagenesis. In aggressive lymphoma patients, low expression of NR4A3 was associated with poor survival. Ectopic expression or pharmacological activation of NR4A3 in lymphoma cell lines led to a significantly higher proportion of apoptotic cells. In a mouse NSG xenograft model of lymphoma (stably transduced SuDHL4 cells), NR4A3 expression abrogated tumor growth, compared to vector control and uninduced cells which formed massive tumors...
March 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28242975/radio-adaptive-response-in-myocardial-perfusion-imaging-induced-by-technetium-99m
#20
Mohammad Mehdi Shirazi, Ali Shabestani-Monfared, Maryam Shahidi, Mehrangiz Amiri, Seyed Mohammad Abedi, Sajad Borzoueisileh, Kourosh Ebrahim Nejad Gorji
PURPOSE OF THE STUDY: Low dose radiation will induce adaptation and following exposure to an adaptive dose, the cells are more resistance to following challenging doses. This phenomenon is known as radio-adaptive response. The aim of this study was to investigate the percentage of apoptotic cells in the peripheral blood samples of the patients which undergo myocardial perfusion imaging (MPI) with technetium-99m (Tc-99m) before thallium scan to assess the induction of radio-adaptive response...
January 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
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