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Abdus Salam, Sabry M Shaheen, Saqib Bashir, Imran Khan, Jianxu Wang, Jörg Rinklebe, Fazal Ur Rehman, Hongqing Hu
Management of toxic elements contaminated upland and wetland soils using biochar is of great concern from both agricultural and environmental points of view. The impact of rice straw- and rapeseed residue-derived biochars produced under 300 °C and 550 °C (added to the soil at 2% and 5%; w/w) on the geochemical fractions, phytoavailability, and uptake of Cu and Pb in a contaminated mining soil under different moisture contents (80%, 60%, and 40% of soil field capacity) was investigated in a greenhouse pot experiment using maize...
February 15, 2019: Journal of Environmental Management
Camila Batista de Melo, Francine Côa, Oswaldo Luiz Alves, Diego Stéfani T Martinez, Edison Barbieri
Graphene oxide (GO) has been evaluated for application in environmental remediation and pollution control strategies. However, the side effects caused by the interactions of GO with classical pollutants in aquatic environments are still largely unknown. In this work, the ecotoxicological effects of GO, cadmium, zinc and the interactions between GO and these trace elements (co-exposure) were evaluated through acute toxicity tests and routine metabolism (i.e., oxygen consumption and ammonia excretion) in Palaemon pandaliformis (shrimp)...
February 12, 2019: Chemosphere
Alexander B Siy, Victoria R Rendell, Emily R Winslow
BACKGROUND: Although the surgical case series is a useful study design for surgical disciplines, elements of its presentation have not been standardized with a widely accepted reporting guideline. Hence, case series may not include all components necessary for surgeons to best interpret their results. We aimed to determine core elements of case series through qualitative analysis of discussions after presentations at national meetings. METHODS: Case series with accompanying discussions in three high-impact journals from 2010 to 2015 were analyzed with conventional content analysis...
February 15, 2019: Journal of Surgical Research
Qianping Lou, Koteswara Rao Bandi, Yanqiu Dong, Hongli Bao, Daliang Li, Qi Chen
Copper is an important element indispensable for human life and health. Many copper-determining probes have been created for exploring its functional behavior in various cell types but few of them contains both fluorescent and colorimetric characters. In the present study, we developed a set of copper probes by synthesizing several novel thiophene-based Schiff bases in order to make a suitable sensor for quantifying and imaging copper in living cells. We find that the ligand FS-1 has a splendid selectivity and affinity toward Cu2+ among the common divalent metal ions...
February 11, 2019: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Neyir Ozcan
The essential purpose of this work is to conduct an investigation into stability problem for the class of neutral-type Cohen-Grossberg neural networks including multiple time delays in states and multiple neutral delays in time derivative of states. By proposing an appropriate Lyapunov functional, a new sufficient criterion is derived for global asymptotic stability of neutral-type neural networks. The obtained stability criterion is independent of time delay and neutral delay parameters, and it is completely stated in terms of the elements of interconnection matrices and other network parameters...
February 6, 2019: Neural Networks: the Official Journal of the International Neural Network Society
Christian O Dimkpa, Upendra Singh, Prem S Bindraban, Ishaq O Adisa, Wade H Elmer, Jorge L Gardea-Torresdey, Jason C White
Plant response to microelements exposure can be modulated based on particle size. However, studies are lacking on the roles of particle size and specific microelements in mixed exposure systems designed for plant nutrition, rather than toxicology. Here, an addition-omission strategy was used to address particle-size and element-specific effects in soybean exposed to a mixture of nano and bulk scale oxide particles of Zn (2 mg Zn/kg), Cu (1 mg Cu/kg) and B (1 mg B/kg) in soil. Compared to the control, mixtures of oxide particles of both sizes significantly (p < 0...
February 11, 2019: Science of the Total Environment
Andrew Turner
Seventy samples of laundry dryer lint from 19 households have been analysed for trace elements (As, Br, Cu, Fe, Ni, Pb, Sb, Zn) by energy-dispersive portable X-ray fluorescence (XRF) spectrometry. Bromine, Fe and Zn were detected in more than sixty samples encompassing all households, with dry weight concentrations ranging from 5.5 to 213 μg g-1 , 76 to 3580 μg g-1 and 24 to 3540 μg g-1 , respectively. Lead and Sb were detected in twenty and eight samples from ten and seven households, respectively, with concentrations ranging from about 8 to 110 μg g-1 for Pb and 40 to 90 μg g-1 for Sb...
February 6, 2019: Science of the Total Environment
R Gelly, Z Fekiacova, A Guihou, E Doelsch, P Deschamps, C Keller
Sourcing and understanding the fate of anthropogenic metals in a historical contamination context is challenging. Here we combined elemental and isotopic (Pb, Zn, Cu) analyses with X-ray Absorption Spectroscopy (XAS) measurements (Zn) to trace the fate, in undisturbed soil profiles, of historical metal contamination emitted by a 167-year-old Pb-Ag smelter decommissioned 100 years ago located in the Calanques National Park (Marseilles, France). Lead isotopic measurements show that entire soil profiles were affected by 74 years of Pb emissions up to ~7 km from the smelter under the main NNW wind, and indicate particulate transfer down to 0...
February 8, 2019: Science of the Total Environment
Mansi Bakshi, Clarisse Liné, Diana E Bedolla, Ricardo José Stein, Ralf Kaegi, Géraldine Sarret, Ana E Pradas Del Real, Hiram Castillo-Michel, P C Abhilash, Camille Larue
Increasing evidence indicates the presence of engineered nanoparticles (ENPs) in sewage sludge derived from wastewater treatment. Land application of sewage sludge is, therefore, considered as an important pathway for ENP transfer to the environment. The aim of this work was to understand the effects of sewage sludge containing nano-TiO2 on plants (tomato) when used as an amendment in agricultural soil. We assessed developmental parameters for the entire plant life cycle along with metabolic and bio-macromolecule changes and titanium accumulation in plants...
February 11, 2019: Journal of Hazardous Materials
Chen Chu, Haiya Zhang, Shijie Cui, Bin Han, Lixiao Zhou, Ning Zhang, Xuan Su, Yujie Niu, Wen Chen, Rui Chen, Rong Zhang, Yuxin Zheng
PM2.5 pollution has been associated with numerous adverse effects including cardiovascular, respiratory and metabolic diseases as well as emotional disorders. However, the potential mechanism has not known clearly. Twenty-four rats were divided into 3 groups and exposed to various airs: filtered air (FA), unfiltered air (UA) and concentrated PM2.5 air (CA), respectively. Thirty wild type (WT) and 30 Nrf2 knockout (KO) mice were divided into 2 groups and exposed to FA and UA, respectively. The changes of neurobehavioral function, neurotransmitter secretion, toxic elements deposition, oxidative stress and the inflammation in prefrontal cortex were investigated during 9-12 weeks with/without PM2...
February 10, 2019: Journal of Hazardous Materials
Rone Aparecido De Grandis, Patrick Wellington da Silva Dos Santos, Katia Mara de Oliveira, Ana Rita Tomazela Machado, Alexandre Ferro Aissa, Alzir Azevedo Batista, Lusânia Maria Greggi Antunes, Fernando Rogério Pavan
This study describes a series of newly synthesized phosphine/diimine ruthenium complexes containing the lawsone as bioligand with enhanced cytotoxicity against different cancer cells, and apoptosis induction in prostatic cancer cells DU-145. The complexes [Ru(law)(N-N)2 ]PF6 where N-N is 2,2'-bipyridine (1) or 1,10-phenanthroline (2) and [Ru(law)(dppm)(N-N)]PF6 , where dppm means bis(diphenylphosphino)methane, N-N is 2,2'-bipyridine (3) or 1,10-phenanthroline (4), and law is lawsone, were synthesized and fully characterized by elemental analysis, molar conductivity, NMR, UV-vis, IR spectroscopies and cyclic voltammetry...
February 8, 2019: Bioorganic Chemistry
Jana Růžičková, Marek Kucbel, Helena Raclavská, Barbora Švédová, Konstantin Raclavský, Dagmar Juchelková
The combustion of biomass in boilers of emission classes 2 and 3 produces deposits in the form of char and soot inside the combustion chamber. Char and soot differ in content of elemental carbon (EC) and organic carbon (OC) as well as in the content of organic compounds. Deposits from boilers of emission class 2 contain higher amounts of OC and EC than those from boilers of emission class 3. The only exception is deposits formed by the combustion of briquettes from hardwood in boilers of emission class 3 that contained approximately by up to 60 percent higher amount of OC and by approx...
February 15, 2019: Journal of Environmental Management
Carole Mackavey, Stan Cron
INTRODUCTION: The struggle to maintain quality education in the online environment has brought about the redesign for the family nurse practitioner courses. BACKGROUND: The family nurse practitioner program uses graduate Health Education Systems Incorporated examination as a quality indicator and program benchmark. A downward trend in Health Education Systems Incorporated examination scores stimulated a need for change. Two strategies were implemented to enhance engagement and improve synthesis of clinical information...
January 26, 2019: Nurse Education Today
Shuwei Hu, Liping Xia, Hanwen Luo, Yanyong Xu, Hong Yu, Dan Xu, Hui Wang
This study aimed to evaluate female adult offspring induced by prenatal caffeine exposure (PCE) are susceptible to non-alcoholic fatty liver disease (NAFLD) and to explore the underlying programming mechanisms. Pregnant rats were intragastrically administered caffeine (30, 60, and 120 mg/kg.d) on gestational day (GD) 9-20. The female adult offspring were randomly divided into three groups: offspring without or with chronic stress during postnatal week (PW) 10-12 and PW28 offspring. Results showed that PW28 PCE female offspring had a higher hepatic triglyceride content and Kleiner scores, accompanied by elevated serum corticosterone levels...
February 15, 2019: Toxicology
Afsaneh Lavasanifar, Cierra N Sharp, Erik A Korte, Tyler Yin, Keivan Hosseinnijad, Saeed A Jortani
Long Interspersed Nuclear Element-1 (LINE-1) are DNAs that compromise 17% of our genome. LINE-1 expression is triggered by environmental stressors and accomplished through its demethylation leading to genomic instability. Expression of LINE-1 is regulated in adult somatic tissues through several endogenous defensive mechanisms but is found to be associated with tumorigenesis in several cancers. This finding, has inspired the use of different indicators of LINE-1 activation, as biomarkers in cancer diagnostics and even therapeutic targets in recent years...
February 15, 2019: Clinica Chimica Acta; International Journal of Clinical Chemistry
Sophie Lauridsen, Uffe Christian Braae, Helena Aminel Ngowi, Maria Vang Johansen
BACKGROUND: Taenia solium is a zoonotic tapeworm widely distributed across sub-Saharan Africa. Specific health education is regarded as a central element in controlling T. solium. In 2014, an electronic health education tool called 'The Vicious Worm', which was concerned with prevention of T. Solium was introduced to health and agricultural professionals in Mbeya, Tanzania, an endemic setting. Introduction to ´The Vicious Worm' of 1.5-hours significantly improved the participants' knowledge...
February 15, 2019: Acta Tropica
Kun Shi, Yunlin Zhang, Yibo Zhang, Na Li, Boqiang Qin, Guangwei Zhu, Yongqiang Zhou
Phytoplankton phenology critically affects elements biogeochemical cycles, ecosystem structure, and productivity. However, our understanding about the phenological process and driving mechanism is still very limited due to the shortage of long-term observation data. We used all available daily MODIS-Aqua data from 2003 to 2017 to determine bloom start dates (BSDs) in a typical trophic lake (Lake Taihu) and investigate how phytoplankton BSDs respond to climate change and environmental factors. The results indicate that BSDs have advanced 29...
February 18, 2019: Environmental Science & Technology
Jiaxin Shi, Baogang Zhang, Rui Qiu, Chunyu Lai, Yufeng Jiang, Chao He, Jianhua Guo
Chromate (Cr(VI)), as one of ubiquitous contaminants in groundwater, has posed a major threat to public health and ecological environment. Although various electron donors (e.g., organic carbon, hydrogen and methane) have been proposed to drive chromate removal from contaminated water, little is known for microbial chromate reduction coupled to elemental sulfur (S(0)) or zerovalent iron (Fe(0)) oxidation. This study demonstrated chromate could be biologically reduced by using S(0) or Fe(0) as inorganic electron donor...
February 18, 2019: Environmental Science & Technology
Ali Rahimian, Christian Siltanen, Hamid Feyzizarnagh, Patricio Escalante, Alexander Revzin
Cytokines are produced by leukocytes in blood and may be used as indicators of malignancies or infections. The objective of this study was to develop a strategy for immunosensing cytokines in whole, unprocessed human blood. Microfluidic droplet generation was employed to fabricate ∼400 μm diameter microcapsules with a hydrogel shell and an aqueous core containing sensing microbeads. The hydrogel shell was composed of poly(ethylene glycol) forming a thin (∼10 μm) immunoisolation layer protecting antibody-modified microbeads inside the capsule from immune cells on the outside...
February 18, 2019: ACS Sensors
Hongtao Ren, Zixin Xiong, Enze Wang, Zhiquan Yuan, Yufei Sun, Kunlei Zhu, Bolun Wang, Xuewen Wang, Hanyuan Ding, Peng Liu, Lei Zhang, Junqiao Wu, Shoushan Fan, Xiaoyan Li, Kai Liu
Thin films with large compressive residual stress and low interface adhesion can buckle and delaminate from relatively rigid substrates, which is a common failure mode of film/substrate interfaces. Current studies mainly focused on the geometry of various buckling patterns and related physical origins based on a static point of view. However, fundamental understanding of dynamic propagation of buckles, particularly for the complicated web buckles, remains challenging. We adopt strained two-dimensional MoS2 thin films to study the phenomenon of web buckling because their interface adhesion, namely van der Waals interaction, is naturally low...
February 18, 2019: ACS Nano
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