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https://www.readbyqxmd.com/read/28641175/atmospheric-dust-deposition-on-soils-around-an-abandoned-fluorite-mine-hammam-zriba-ne-tunisia
#1
Chaima Djebbi, Fredj Chaabani, Oriol Font, Ignasi Queralt, Xavier Querol
The present study focuses on the eolian dispersion and dust deposition, of major and trace elements in soils in a semi-arid climate, around an old fluorite (CaF2) and barite (BaSO4) mine, located in Hammam Zriba in Northern Tunisia. Ore deposits from this site contain a high amount of metal sulphides constituting heavy metal pollution in the surrounding environment. Samples of waste from the surface of mine tailings and agricultural topsoil samples in the vicinity of the mine were collected. The soil samples and a control sample from unpolluted area, were taken in the direction of prevailing northwest and west winds...
June 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28640639/alkaline-earth-centered-co-homologation-reduction-and-amine-carbonylation
#2
Mathew D Anker, Christos E Kefalidis, Yan Yang, Jian Fang, Michael S Hill, Mary F Mahon, Laurent Maron
Reactions of -diketiminato magnesium and calcium hydrides with 1 atmosphere of CO result in a reductive coupling process to produce the corresponding derivatives of the cis-ethenediolate dianion. Computational (DFT) analysis of this processes mediated by Ca, Sr and Ba highlight a common mechanism and a facility for the reaction that increases with increasing alkaline earth (Ae) atomic weight. Reaction of CO with PhSiH3 in the presence of the magnesium or calcium hydrides results in catalytic reduction to methylsilane and methylene silylether products respectively...
June 22, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28637315/attenuated-effects-of-bile-acids-on-glucose-metabolism-and-insulin-sensitivity-in-a-male-mouse-model-of-prenatal-undernutrition
#3
Huijuan Ma, Vicencia M Sales, Ashley R Wolf, Sathish Subramanian, Tucker J Matthews, Michael Chen, Aparna Sharma, Walt Gall, Wim Kulik, David E Cohen, Yusuke Adachi, Nicholas W Griffin, Jeffrey I Gordon, Mary-Elizabeth Patti, Elvira Isganaitis
Prenatal undernutrition and low birth weight are associated with risk of type 2 diabetes and obesity. Prenatal caloric restriction results in low birth weight, glucose intolerance, obesity, and reduced plasma bile acids (BA) in offspring mice. Since BAs can regulate systemic metabolism and glucose homeostasis, we hypothesized that BA supplementation could prevent diet-induced obesity and glucose intolerance in this model of developmental programming. Pregnant dams were food restricted by 50% from gestational days 12...
June 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28636728/synchronous-lesions-of-the-right-accessory-parotid-gland-and-left-main-parotid-gland
#4
Ba D Nguyen
No abstract text is available yet for this article.
June 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28635200/unusual-symptomatic-late-onset-presentation-of-aberrant-right-subclavian-artery-report-of-two-cases-and-short-literature-review
#5
Yannis Dimitroglou, Ioannis Loulakas, Maria Chounti, Michail Megalakakis, Eleni Karavana, Panagiotis Hountis
Aberrant subclavian arteries are congenital vascular anomalies that usually do not cause any symptoms. When symptomatic they are considered as a rare cause of dysphagia. This presentation is known as dysphagia lusoria. They are diagnosed by barium swallow or contrast-enhanced computed tomography, although it may be an incidental finding. Management varies from life modifications and drug therapy to surgical intervention. We report two cases of the unusual form of late onset symptomatic presentation because of the presence of aberrant right subclavian artery...
May 18, 2017: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
https://www.readbyqxmd.com/read/28634487/dynamic-inertia-weight-binary-bat-algorithm-with-neighborhood-search
#6
Xingwang Huang, Xuewen Zeng, Rui Han
Binary bat algorithm (BBA) is a binary version of the bat algorithm (BA). It has been proven that BBA is competitive compared to other binary heuristic algorithms. Since the update processes of velocity in the algorithm are consistent with BA, in some cases, this algorithm also faces the premature convergence problem. This paper proposes an improved binary bat algorithm (IBBA) to solve this problem. To evaluate the performance of IBBA, standard benchmark functions and zero-one knapsack problems have been employed...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28634191/cd36-knockout-mice-are-protected-against-lithogenic-diet-induced-gallstones
#7
Yan Xie, Vincenza Cifarelli, Terri Pietka, Elizabeth P Newberry, Susan M Kennedy, Amin Khalifeh-Soltani, Robin Clugston, Kamran Atabai, Nada A Abumrad, Nicholas O Davidson
The scavenger receptor and multiligand transporter CD36 functions to promote cellular free fatty acid uptake and regulates aspects of both hepatic and intestinal cholesterol metabolism. However, the role of CD36 in regulating canalicular and biliary cholesterol transport and secretion is unknown. Here we show that germline Cd36 knockout mice are protected against lithogenic diet (LD) induced gallstones compared to congenic (C57BL6/J) controls. Cd36 knockout mice crossed into congenic L-Fabp knockout mice (DKO mice) demonstrated protection against LD induced gallstones, reversing the susceptibility phenotype observed in L-Fabp knockout mice...
June 20, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28633945/assessment-of-heavy-metal-contamination-in-marine-sediments-of-east-coast-of-tamil-nadu-affected-by-different-pollution-sources
#8
N Harikrishnan, R Ravisankar, A Chandrasekaran, M Suresh Gandhi, K V Kanagasabapathy, M V R Prasad, K K Satapathy
The aim of this study was to determine the concentration of heavy metals in the sediments of Periyakalapet to Parangipettai coast, east coast of Tamil Nadu, by using energy-dispersive X-ray fluorescence (EDXRF) technique. The average heavy metal concentrations in the sediment samples were found in the order Al>Fe>Ca>Ti>K>Mg>Mn>Ba>V>Cr>Zn>La>Ni>Pb>Co>Cd>Cu. The average heavy metal concentrations were below the world crustal average. The degree of contamination by heavy metals was evaluated using pollution indices...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28633869/baccaurea-angulata-fruit-juice-ameliorates-altered-hematological-and-biochemical-biomarkers-in-diet-induced-hypercholesterolemic-rabbits
#9
Idris Adewale Ahmed, Maryam Abimbola Mikail, Muhammad Ibrahim
Hypercholesterolemia is an important risk factor linked to the alteration of blood hematology and clinical chemistry associated with the development and progression of atherosclerosis. Previous studies have demonstrated the safety and potential health benefits of Baccaurea angulata (BA) fruit. We hypothesized that the oral administration of BA fruit juice could ameliorate the alteration in the hematological and biochemical biomarkers of diet-induced hypercholesterolemic rabbits. The aim of this study was to investigate the effects of different doses of BA juice on the hematological and biochemical biomarkers in normo- and hypercholesterolemic rabbits...
June 2017: Nutrition Research
https://www.readbyqxmd.com/read/28633547/lipid-based-nanosystem-of-edaravone-development-optimization-characterization-and-in-vitro-in-vivo-evaluation
#10
Ankit Parikh, Krishna Kathawala, Chun Chuan Tan, Sanjay Garg, Xin-Fu Zhou
Edaravone (EDR) is a well-recognized lipophilic free radical scavenger for diseases including neurodegenerative disease, cardiovascular disease, and cancer. However, its oral use is restricted due to poor oral bioavailability (BA). The aim of present research was to enable its oral use by developing a lipid-based nanosystem (LNS). The components of LNS including oil, surfactants, and co-surfactants were selected based on their potential to maximize the solubilization in gastrointestinal (GI) fluids, reduce its glucuronidation and improve transmembrane permeability...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28632602/visits-to-the-emergency-department-after-joint-replacement-commentary-on-an-article-by-micaela-a-finnegan-ba-et-al-emergency-department-visits-following-elective-total-hip-and-knee-replacement-surgery-identifying-gaps-in-continuity-of-care
#11
https://www.readbyqxmd.com/read/28631948/possible-contribution-of-pannexin-1-to-capsaicin-induced-atp-release-in-rat-nasal-columnar-epithelial-cells
#12
Toyoaki Ohbuchi, Ba Hung Do, Hiroki Koizumi, Shoko Takeuchi, Yoichi Ueta, Hideaki Suzuki
Current evidence indicates that transient receptor potential (TRP) channel activity involves a relationship between opening of pannexin-1 and release of ATP into the extracellular space. We examined the effects of agonists of thermosensitive TRP channels (TRPM8, TRPA1, TRPV1, and TRPV2) on ATP release from rat nasal mucosa, and measured ciliary beat frequency (CBF) using digital high-speed video imaging. Single-cell patch clamping from dissociated rat nasal columnar epithelial cells was performed to confirm the relationship between pannexin-1 and TRP...
February 10, 2017: Channels
https://www.readbyqxmd.com/read/28631896/boric-acid-gel-as-local-drug-delivery-in-the-treatment-of-class-ii-furcation-defects-in-chronic-periodontitis-a-randomized-controlled-clinical-trial
#13
Sandeep Singhal, Avani Raju Pradeep, Dharmendra Kanoriya, Shruti Garg, Vibhuti Garg
AIM: Boric acid (BA) exhibits antibacterial, anti-inflammatory, as well as osteoblastic, activity. The aim of the present study was to explore the efficacy of 0.75% BA gel as a local drug-delivery system in adjunct to scaling and root planing (SRP) for the treatment of class II furcation defects in comparison with placebo gel. METHODS: A total of 48 mandibular class II furcation defects were randomized and treated with either 0.75% BA gel or placebo gel. Clinical parameters were recorded at baseline, 3 months, and 6 months, while radiographic parameters were recorded at baseline and 6 months...
June 20, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28631724/microscopic-origins-of-the-large-piezoelectricity-of-leadfree-ba-ca-zr-ti-o3
#14
Yousra Nahas, Alireza Akbarzadeh, Sergei Prokhorenko, Sergey Prosandeev, Raymond Walter, Igor Kornev, Jorge Íñiguez, L Bellaiche
In light of directives around the world to eliminate toxic materials in various technologies, finding lead-free materials with high piezoelectric responses constitutes an important current scientific goal. As such, the recent discovery of a large electromechanical conversion near room temperature in (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 compounds has directed attention to understanding its origin. Here, we report the development of a large-scale atomistic scheme providing a microscopic insight into this technologically promising material...
June 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28630784/elemental-characterization-of-romanian-crop-medicinal-plants-by-neutron-activation-analysis
#15
Daniela Haidu, Dénes Párkányi, Radu Ioan Moldovan, Cecilia Savii, Iulia Pinzaru, Cristina Dehelean, Ludovic Kurunczi
The metallic elements concentrations of medicinal plants (coriander, dill, Echinacea, lavender, chamomile, mint, and plantain, used for phytopharmaceutical products), cultivated in unpolluted region, were analyzed by neutron activation analysis. The essential nutrients, macro-, micro-, and trace elements (K, Ca, Mg, Na, Fe, Mn, Rb, Sr, and Zn), potentially toxic elements (Al, As, Ba, Co, Sb, Cr, and V), and rare earth elements were monitored and were compared with those presented in the literature. An estimation of their contributions to intake and toxicity for a person was made, which revealed that (a) teas prepared from the examined plants represent useful contribution to the food provided intake of three essential macronutrients (K, Ca, and Mg); (b) the Cu, Mn, Rb, Sr, Zn, and rare earths levels are normal or low; (c) the quantities of As, Ba, Co, Sb, Cr, and V do not represent toxicological concerns; (d) the examination of the estimated Al and Fe quantities recovered in infusions in the conditions of usual daily tea consumption is below the Tolerable Daily Intake values...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28630353/evaluation-of-a-proposal-for-reliable-low-cost-grid-power-with-100-wind-water-and-solar
#16
Christopher T M Clack, Staffan A Qvist, Jay Apt, Morgan Bazilian, Adam R Brandt, Ken Caldeira, Steven J Davis, Victor Diakov, Mark A Handschy, Paul D H Hines, Paulina Jaramillo, Daniel M Kammen, Jane C S Long, M Granger Morgan, Adam Reed, Varun Sivaram, James Sweeney, George R Tynan, David G Victor, John P Weyant, Jay F Whitacre
A number of analyses, meta-analyses, and assessments, including those performed by the Intergovernmental Panel on Climate Change, the National Oceanic and Atmospheric Administration, the National Renewable Energy Laboratory, and the International Energy Agency, have concluded that deployment of a diverse portfolio of clean energy technologies makes a transition to a low-carbon-emission energy system both more feasible and less costly than other pathways. In contrast, Jacobson et al. [Jacobson MZ, Delucchi MA, Cameron MA, Frew BA (2015) Proc Natl Acad Sci USA 112(49):15060-15065] argue that it is feasible to provide "low-cost solutions to the grid reliability problem with 100% penetration of WWS [wind, water and solar power] across all energy sectors in the continental United States between 2050 and 2055", with only electricity and hydrogen as energy carriers...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28630000/betaine-aldehyde-dehydrogenase-expression-during-physiological-cardiac-hypertrophy-induced-by-pregnancy
#17
Jesús Alfredo Rosas-Rodríguez, José Guadalupe Soñanez-Organis, José Arquimides Godoy-Lugo, Juan Alberto Espinoza-Salazar, Cesar Jeravy López-Jacobo, Norma Aurora Stephens-Camacho, Guadalupe González-Ochoa
Betaine Aldehyde Dehydrogenase (betaine aldehyde: NAD(P)(+) oxidoreductase, (E.C. 1.2.1.8; BADH) catalyze the irreversible oxidation of betaine aldehyde (BA) to glycine betaine (GB) and is essential for polyamine catabolism, γ-aminobutyric acid synthesis, and carnitine biosynthesis. GB is an important osmolyte that regulates the homocysteine levels, contributing to a vascular risk factor reduction. In this sense, distinct investigations describe the physiological roles of GB, but there is a lack of information about the GB novo synthesis process and regulation during cardiac hypertrophy induced by pregnancy...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28628977/enhanced-performance-of-microbial-fuel-cell-with-in-situ-preparing-dual-graphene-modified-bioelectrode
#18
Junfeng Chen, Yongyou Hu, Xiaojun Tan, Lihua Zhang, Wantang Huang, Jian Sun
This study proposed a three-step method to prepare dual graphene modified bioelectrode (D-GM-BE) by in situ microbial-induced reduction of GO and polarity reversion in microbial fuel cell (MFC). Both graphene modified bioanode (GM-BA) and biocathode (GM-BC) were of 3D graphene/biofilm architectures; the viability and thickness of microbial biofilm decreased compared with control bioelectrode (C-BE). The coulombic efficiency (CE) of GM-BA was 2.1 times of the control bioanode (C-BA), which demonstrated higher rate of substrates oxidation; the relationship between peak current and scan rates data meant that GM-BC was of higher efficiency of catalyzing oxygen reduction than the control biocathode (C-BC)...
June 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28628822/spatial-distribution-of-trace-element-ca-normalized-ratios-in-primary-and-permanent-human-tooth-enamel
#19
Théo Tacail, Lenka Kovačiková, Jaroslav Brůžek, Vincent Balter
The trace elements distribution embedded in tooth enamel offers a means to study exposure of toxic metals and allows the reconstruction of dietary behaviors. The quantification of most of the elements with a spatial high resolution (~50μm) is routinely achieved using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). However, the lack of a comprehensive framework of trace elements distribution in enamel jeopardizes any endorsed sampling strategy using LA-ICPMS. The present work is an effort to improve our knowledge on this issue...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28627874/impact-of-postsynthetic-modification-on-the-electrical-and-magnetic-properties-of-materials
#20
K S Asha, Niyaz Ahmed, Ramesh Nath, Denis Kuznetsov, Sukhendu Mandal
Postsynthetic modification is a promising tool for introducing multifunctional properties in metal-organic frameworks (MOFs). The effects of postsynthetic metal addition/exchange in a barium-based MOF have been well examined toward their magnetic and electrical properties. The rattling motion of the extraframework organic cation is responsible for the ferroelectric behavior. The strong magnetic frustration in Tb@1 is found to arise from the nearly triangular arrangement of Tb(3+) ions in its secondary building unit along the chain direction...
June 19, 2017: Inorganic Chemistry
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