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Mahfuza Mubarak, Hyokyung Jeon, Md Shahinul Islam, Cheolho Yoon, Jong-Seong Bae, Seong-Ju Hwang, Won San Choi, Ha-Jin Lee
Herein, Mg/Fe layered double hydroxide (MF-LDH) hollow nanospheres were successfully prepared by a one-step thermal method. After the thermal treatment of MF-LDH nanospheres at 400 °C, the MF-LDH was converted into the corresponding oxide, Mg/Fe layered double oxide (MF-LDO), which maintained the hollow nanosphere structure. The MF-LDO hollow nanospheres exhibited excellent adsorption efficiency for both As(V) and Cr(VI), showing 99% removal within 5 min and providing maximum removal capacities of 178...
March 6, 2018: Chemosphere
Glaucia Resende Soares, Carolina Foot Gomes de Moura, Marcelo Jose Dias Silva, Wagner Vilegas, Aline Boveto Santamarina, Luciana Pellegrini Pisani, Debora Estadella, Daniel Araki Ribeiro
The aim of this study was to evaluate the chemopreventive potential of purple carrot extract following rat tongue carcinogenesis induced by 4-nitroquinoline 1-oxide (4NQO). For this purpose, histopathological analysis, proliferative status, antioxidant activity and inflammatory status were investigated in this setting. A total of 20 male rats were distributed into four groups as follows (n = 5 per group): Group 1-free access to water and commercial diet for 12 weeks; Group 2-received 4NQO at 50 ppm dose in drinking water daily and commercial diet for 12 weeks; Group 3-free access to water and received diet supplemented with purple carrot extract (0...
March 15, 2018: Medical Oncology
Vincent Clesi, Mohamed Ali Bouhifd, Nathalie Bolfan-Casanova, Geeth Manthilake, Federica Schiavi, Caroline Raepsaet, Hélène Bureau, Hicham Khodja, Denis Andrault
Hydrogen has been thought to be an important light element in Earth's core due to possible siderophile behavior during core-mantle segregation. We reproduced planetary differentiation conditions using hydrogen contents of 450 to 1500 parts per million (ppm) in the silicate phase, pressures of 5 to 20 GPa, oxygen fugacity varying within IW-3.7 and IW-0.2 (0.2 to 3.7 log units lower than iron-wüstite buffer), and Fe alloys typical of planetary cores. We report hydrogen metal-silicate partition coefficients of ~2 × 10-1 , up to two orders of magnitude lower than reported previously, and indicative of lithophile behavior...
March 2018: Science Advances
Amarjeet Singh, Bhavana Sharma, Renu Deswal
In the present study, we report perhaps for the first time the use of novel varieties of Brassica oleracea var. botrytis and Raphanus sativus as potential bioreductant, to synthesize highly stable silver nanoparticles (AgNPs, no aggregation observed for six months), which is a significant finding as plant extract-directed AgNPs are intrinsically unstable and tend to aggregate. The reduction of Ag+ to Ag0 nanostructures was confirmed using UVVis spectroscopy showing SPR spectra at 400-435 nm. Nanosight and transmission electron microscope (TEM) analysis showed monodisperse spherical AgNPs (4-18 nm)...
May 2018: Journal of Trace Elements in Medicine and Biology
M Murali, P Athif, P Suganthi, A Sadiq Bukhari, H E Syed Mohamed, H Basu, R K Singhal
In the present study, freshwater fish Oreochromis mossambicus were exposed to sub lethal concentrations (120, 150 and 180 ppm) of Aluminium oxide nanoparticles (Al2 O3 NPs) for 96 h. Histological abnormalities were not observed in the organs of control fishes whereas severe damages and extensive architectural loss was found in the brain, gill, intestine, kidney and muscle tissues of treated fishes with more pronounced effects in 180 ppm. The results showed that the acute exposure to Al2 O3 NPs altered the histoarchitecture in various fish tissues...
March 5, 2018: Environmental Toxicology and Pharmacology
Florent Starecki, Nora Abdellaoui, Alain Braud, Jean-Louis Doualan, Catherine Boussard-Plédel, Bruno Bureau, Patrice Camy, Virginie Nazabal
In this Letter, we report for the first time, to the best of our knowledge, on an emission at 8 μm from Tb3+ -doped Ga5 Ge20 Sb10 Se65 chalcogenide fibers with doping levels at 1000 ppm and 500 ppm. These fibers were drawn following conventional melt-quenching methods and pumped at 2.05 μm using a Tm3+ : YAG laser. The spectroscopic properties of the emitting F4 7 manifold are investigated to rule out any parasitic signal mimicking the real Tb3+ 8 μm emission. Time-resolved spectroscopic experiments are presented to build a comprehensive study of this 8 μm fluorescence recorded with a clear signal-to-noise ratio...
March 15, 2018: Optics Letters
Neeraj Kumar, Kishore Kumar Krishnani, Sanjay Kumar Gupta, Narendra Pratap Singh
Nanotechnology is a novel arena with promising applications in the field of medicine, industry, and agriculture including fisheries. Cross-disciplinary interactions and the application of this technology in biological systems have led to the innovation of novel nanoparticle antioxidants, which are the subject of our study. In context with above background, we designed an experiment on nano-silver to elucidate its role for mitigation of abiotic and biotic stress. Three diets were formulated viz. silver nanoparticles (Ag-NPs) incorporated at 0...
March 14, 2018: Environmental Science and Pollution Research International
Mohamed Ghanem, Mohamed Zeineldin, Attia Eissa, Eman El Ebissy, Rasha Mohammed, Yassein Abdelraof
The objective of this study was to evaluate the impact of varying degrees of water salinity on the ultrasonographical and histopathological appearance of the liver and kidneys in Barki sheep. Thirty Barki sheep (initial weight, 29.48 ± 0.81 kg) were allocated into three groups (n=10 per group) based on the type of drinking water for 9 months: the tap water (TW) group (350 ppm total dissolved solids [TDS]); the moderate saline water (MSW) group (4557 ppm TDS); and the high saline water (HSW) group (8934 ppm TDS)...
March 14, 2018: Journal of Veterinary Medical Science
Parwis B Rahmanian, Kaveh Eghbalzadeh, Süreyya Kaya, Hruy Menghesha, Stephen Gerfer, Oliver J Liakopoulos, Yeong-Hong Choi, Thorsten Wahlers
OBJECTIVES: Rapid-deployment aortic valve replacement (RD-AVR) potentially reduces procedure times providing excellent haemodynamic results compared to standard tissue aortic valve replacement. However, concerns have been raised regarding higher rates of postoperative pacemaker (PPM) requirement compared to standard aortic valve replacement. In this study, we sought to determine the PPM rate and its potential risk factors in RD-AVR patients. METHODS: Between 2011 and 2017, 193 patients underwent RD-AVR...
March 12, 2018: Interactive Cardiovascular and Thoracic Surgery
Hasmik Grigoryan, William M B Edmands, Qing Lan, Henrik Carlsson, Roel Vermeulen, Luoping Zhang, Song-Nian Yin, Gui-Lan Li, Martyn T Smith, Nathaniel Rothman, Stephen M Rappaport
Although benzene has long been recognized as a cause of human leukemia, the mechanism by which this simple molecule causes cancer has been problematic. A complicating factor is benzene metabolism, which produces many reactive intermediates, some specific to benzene and others derived from redox processes. Using archived serum from 20 nonsmoking Chinese workers, 10 with and 10 without occupational exposure to benzene (exposed: 3.2 - 88.9 ppm, controls: 0.002 - 0.020 ppm), we employed an adductomic pipeline to characterize protein modifications at Cys34 of human serum albumin (HSA), a nucleophilic hotspot in extracellular fluids...
March 10, 2018: Carcinogenesis
Truong Thi Tuong Vi, Selvaraj Rajesh Kumar, Bishakh Rout, Chi-Hsien Liu, Chak-Bor Wong, Chia-Wei Chang, Chien-Hao Chen, Dave W Chen, Shingjiang Jessie Lue
In this work, silver nanoparticles (Ag NPs) were decorated on thiol (-SH) grafted graphene oxide (GO) layers to investigate the antibacterial activities in Gram-positive bacteria ( Staphylococcus aureus ) and Gram-negative bacteria ( Pseudomonas aeruginosa ). The quasi-spherical, nano-sized Ag NPs were attached to the GO surface layers, as confirmed by using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), respectively. The average size of GO-Ag nanocomposites was significantly reduced (327 nm) from those of pristine GO (962 nm) while the average size of loaded Ag NPs was significantly smaller than the Ag NPs without GO...
March 14, 2018: Nanomaterials
Oscar Cabeza, Luisa Segade, Montserrat Domínguez-Pérez, Esther Rilo, David Ausín, Anna Martinelli, Negin Yaghini, Bernhard Gollas, Manfred Kriechbaum, Olga Russina, Alessandro Triolo, Elena López-Lago, Luis M Varela
This paper extends the study of the induced temperature change in the mesostructure and in the physical properties occurring in aqueous mixtures of the ionic liquid 1-ethyl-3-methyl imidazolium octyl-sulfate [EMIm][OSO4 ]. For some compositions, these mixtures undergo a phase transition between the liquid (isotropic in the mesoscale) and the mesomorphic state (lyotropic liquid crystalline) at about room temperature. The behavior of mixtures doped with a divalent metal sulfate was investigated in order to observe their applicability as electrolytes...
March 14, 2018: Physical Chemistry Chemical Physics: PCCP
Alain Manceau, Jianxu Wang, Mauro Rovezzi, Pieter Glatzel, Xinbin Feng
Plant leaves serve both as a sink for gaseous elemental mercury (Hg) from the atmosphere and a source of toxic mercury to terrestrial ecosystems. Litterfall is the primary deposition pathway of atmospheric Hg to vegetated soils, yet the chemical form of this major Hg input remains elusive. We report the first observation of in vivo formation of mercury sulfur nanoparticles in intact leaves of 22 native plants from six different species across two sampling areas from China. The plants grew naturally in soils from a mercury sulfide mining and retorting region at ambient-air gaseous-Hg concentrations ranging from 131 ± 19 to 636 ± 186 ng m-3 and had foliar Hg concentration between 1...
March 14, 2018: Environmental Science & Technology
E A Almeida, A C Sant'Anna, T G Crowe, M Macari, R L Furlan
Previously, we reported the effect of rearing conditions (plastic floors and air quality) on carcass injury development of broiler chickens at thermal comfort. In this study, the same rearing conditions were tested at thermal stress. The birds were reared in 2 climatic chambers, and the experiment followed a completely randomized design with one factor, flooring material: wood shaving or perforated plastic. The birds were divided into 16 experimental pens, being 8 females and 8 males. The studied parameters were the same as the previous study (ammonia concentration, carbon dioxide, performance, carcass yield, and variability, and scores of hygiene, gait and chest, and hocks and footpad lesions)...
March 8, 2018: Poultry Science
Rajkumar Doshi, Dean H Decter, Perwaiz Meraj
BACKGROUND: This study sought to analyze in-hospital outcomes associated with pre-existing and newly implanted Permanent Pacemaker (PPM) in patients who underwent Transcatheter Aortic Valvular Replacement (TAVR). PPM implantation following the development of conduction abnormalities is a common adverse event following TAVR. Furthermore, PPM implantation rates are higher in TAVR patients compared to the surgical alternative, thus we have analyzed the predictors of pacing post-TAVR. METHODS: The study population was identified from the National Inpatient Sample Database between 2012 and 2014...
March 13, 2018: Clinical Cardiology
Vinod K Bhutani, M Jeffrey Maisels, David L Schutzman, Martin E Castillo Cuadrado, Janelle L Aby, Debra L Bogen, Robert D Christensen, Jon F Watchko, Ronald J Wong, David K Stevenson
AIM: To identify neonates at risk for haemolytic hyperbilirubinaemia through near-concurrrent measurements of total serum/plasma bilirubin (TB) or transcutaneous bilirubin (TcB) and end-tidal breath carbon monoxide (CO), corrected for ambient CO (ETCOc), an index of bilirubin production and haemolysis. METHODS: Paired TB/TcB (mg/dL) and ETCOc (ppm) measurements were obtained in newborns (n=283) at 20 to <60h of age in five nurseries. TB/TcB values were assigned TB/TcB percentile risk using the Bhutani hour-specific nomogram...
March 13, 2018: Acta Paediatrica
Derek Leong, Ali A Sovari, Ashkan Ehdaie, Tarun Chakravarty, Qiang Liu, Hasan Jilaihawi, Rajendra Makkar, Xunzhang Wang, Eugenio Cingolani, Michael Shehata
BACKGROUND: Damage to the cardiac conduction system requiring permanent pacemaker (PPM) implantation is a known adverse outcome of transcatheter aortic valve replacement (TAVR). A permanent-temporary pacemaker (PTPM) is a device that involves an active-fixation lead attached to an external pulse generator taped to the skin. We reviewed the utility of PTPMs as a temporary bridge measure after TAVR in patients with conduction abnormalities that do not meet conventional criteria for PPM placement...
March 12, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Runak Ghobadi, Rasoul Mohammadi, Javaher Chabavizade, Masoud Sami
Background: Ganoderma lucidum from Ganodermataceae family is a kind of mushroom known to have various therapeutic properties such as lowering high blood sugar and high blood pressure, boosting the immune system as well as its antibacterial and antioxidant effects. Materials and Methods: this study investigated the oxidative stability, microbial and sensory properties of sausage at three different treatments; (i) 1% w/w Ganoderma lucidum powder (GLP) without nitrite as a food preservative (P), (ii) 0...
2018: Advanced Biomedical Research
Bryony Sands, Neludo Mgidiswa, Casper Nyamukondiwa, Richard Wall
Pyrethroid insecticides are widely used to control ectoparasites of livestock, particularly ticks and biting flies. Their use in African livestock systems is increasing, driven by the need to increase productivity and local food security. However, insecticide residues present in the dung after treatment are toxic to dung-inhabiting insects. In a semiarid agricultural habitat in Botswana, dung beetle adult mortality, brood ball production, and larval survival were compared between untreated cattle dung and cattle dung spiked with deltamethrin, to give concentrations of 0...
March 2018: Ecology and Evolution
Francyenne Maira Castro Gonçalves, Alberto Carlos Botazzo Delbem, Juliano Pelim Pessan, Gabriel Pereira Nunes, Nayara Gonçalves Emerenciano, Luhana Santos Gonzales Garcia, Liliana Carolina Báez Quintero, José Guilherme Neves, Marcelle Danelon
OBJECTIVES: To evaluate in vitro the effect of neutral pH topical gels with reduced fluoride concentration (F), supplemented or not with sodium hexametaphosphate (HMP) on the remineralization of dental enamel, using a pH-cycling model. Materials and methods Bovine enamel blocks with caries-like lesions were randomly treated with five gels (n = 24/group): without F/HMP (Placebo); 4500 ppm F (4500F), 4500F plus 9% HMP (4500F + HMP); 9000 ppm F (9000F); and 12,300 ppm F (Acid gel)...
March 3, 2018: Archives of Oral Biology
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