keyword
MENU ▼
Read by QxMD icon Read
search

Heavy metal screen

keyword
https://www.readbyqxmd.com/read/28129904/a-miniaturized-bismuth-based-sensor-to-evaluate-the-marine-organism-styela-plicata-bioremediation-capacity-toward-heavy-metal-polluted-seawater
#1
Noemi Colozza, Maria Flavia Gravina, Luca Amendola, Modesto Rosati, Djamal Eddine Akretche, Danila Moscone, Fabiana Arduini
Cadmium and lead are highly toxic heavy metals which cause a severe worldwide pollution. In addition to the toxic effect produced by the direct exposure, they can be bioconcentrated and accumulated in living organisms, including humans. Herein, a miniaturized and disposable electrochemical sensor was improved for the simultaneous detection of cadmium and lead ions to study the bioremediation of polluted seawater in presence of the filter-feeding marine organism Styela plicata. A screen-printed electrode modified in situ with a bismuth film was selected using the anodic stripping analysis as detection technique...
January 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28074835/topological-dirac-nodal-lines-and-surface-charges-in-fcc-alkaline-earth-metals
#2
Motoaki Hirayama, Ryo Okugawa, Takashi Miyake, Shuichi Murakami
In nodal-line semimetals, the gaps close along loops in k space, which are not at high-symmetry points. Typical mechanisms for the emergence of nodal lines involve mirror symmetry and the π Berry phase. Here we show via ab initio calculations that fcc calcium (Ca), strontium (Sr) and ytterbium (Yb) have topological nodal lines with the π Berry phase near the Fermi level, when spin-orbit interaction is neglected. In particular, Ca becomes a nodal-line semimetal at high pressure. Owing to nodal lines, the Zak phase becomes either π or 0, depending on the wavevector k, and the π Zak phase leads to surface polarization charge...
January 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28069970/lung-cancer-risk-in-welders-and-foundry-workers-with-a-history-of-heavy-smoking-in-the-usa-the-national-lung-screening-trial
#3
Jason Y Y Wong, Bryan A Bassig, Wei Jie Seow, Wei Hu, Bu-Tian Ji, Aaron Blair, Debra T Silverman, Qing Lan
OBJECTIVES: Foundry work is a risk factor for lung cancer; however, the association with welding is unclear, as smoking is common among metalworkers and may mask the relationship. We evaluated whether history of welding and foundry work, independently and jointly, and employment duration were associated with lung cancer risk in heavy smokers. METHODS: We analysed data from the National Lung Screening Trial, a prospective randomised trial of 53 454 heavy smokers (>30 pack-years) in the USA...
January 9, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28050770/managing-dredged-material-in-the-coastal-zone-of-the-baltic-sea
#4
Marta Staniszewska, Helena Boniecka
This article deals with the legal and practical recommendations for the management of dredged material in the riparian countries of the Baltic Sea. The recommendations are contained in three conventions: LC, 2000. London Convention (1972), Convention on the Protection of the Marine Environment of the Baltic Sea area (Helsinki Convention) (1992), the OSPAR Convention (1972). Different approaches to evaluating the contamination level of dredge spoils, used by the Baltic Sea riparian countries, have been characterized...
January 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28036003/dep-on-go-for-simultaneous-sensing-of-multiple-heavy-metals-pollutants-in-environmental-samples
#5
Madhu Biyani, Radhika Biyani, Tomoko Tsuchihashi, Yuzuru Takamura, Hiromi Ushijima, Eiichi Tamiya, Manish Biyani
We describe a simple and affordable "Disposable electrode printed (DEP)-On-Go" sensing platform for the rapid on-site monitoring of trace heavy metal pollutants in environmental samples for early warning by developing a mobile electrochemical device composed of palm-sized potentiostat and disposable unmodified screen-printed electrode chips. We present the analytical performance of our device for the sensitive detection of major heavy metal ions, namely, mercury, cadmium, lead, arsenic, zinc, and copper with detection limits of 1...
December 27, 2016: Sensors
https://www.readbyqxmd.com/read/28018398/cadmium-accumulation-characteristics-in-turnip-landraces-from-china-and-assessment-of-their-phytoremediation-potential-for-contaminated-soils
#6
Xiong Li, Xiaoming Zhang, Ya Yang, Boqun Li, Yuansheng Wu, Hang Sun, Yongping Yang
Heavy metal (HM) pollution is a global environmental problem that threatens ecosystem and human health. Cadmium (Cd) pollution is the most prominent HM pollution type because of its high toxicity, strong migration, and the large polluted area globally. Phytoremediation of contaminated soil is frequently practiced because of its cost-effectiveness and operability and because it has no associated secondary pollution. High-accumulation plants, including those identified as hyperaccumulators, play an important role in phytoremediation...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27986731/novel-cadmium-resistance-determinant-in-listeria-monocytogenes
#7
Cameron Parsons, Sangmi Lee, Victor Jayeola, Sophia Kathariou
Listeria monocytogenes is a foodborne pathogen that can cause severe disease (listeriosis) in susceptible individuals. It is ubiquitous in the environment and often exhibits resistance to heavy metals. One of the determinants that enables Listeria to tolerate exposure to cadmium is the cadAC efflux system, with CadA being a P-type ATPase. Three different cadA genes (designated cadA1 to cadA3) were previously characterized in L. monocytogenes A novel putative cadmium resistance gene (cadA4) was recently identified through whole-genome sequencing, but experimental confirmation for its involvement in cadmium resistance is lacking...
March 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27981852/epigenetics-obesity-and-early-life-cadmium-or-lead-exposure
#8
Sarah S Park, David A Skaar, Randy L Jirtle, Cathrine Hoyo
Obesity is a complex and multifactorial disease, which likely comprises multiple subtypes. Emerging data have linked chemical exposures to obesity. As organismal response to environmental exposures includes altered gene expression, identifying the regulatory epigenetic changes involved would be key to understanding the path from exposure to phenotype and provide new tools for exposure detection and risk assessment. In this report, we summarize published data linking early-life exposure to the heavy metals, cadmium and lead, to obesity...
January 2017: Epigenomics
https://www.readbyqxmd.com/read/27934187/3d-printed-microfluidic-device-with-microporous-mn2o3-modified-screen-printed-electrode-for-real-time-determination-of-heavy-metal-ions
#9
Ying Hong, Meiyan Wu, Guangwei Chen, Ziyang Dai, Yizhou Zhang, Guosong Chen, Xiaochen Dong
Fabricating portable devices for the determination of heavy metal ions is an ongoing challenge. Here, a 3D printing approach was adopted to fabricate a microfluidic electrochemical sensor with the desired shape in which the model for velocity profiles in microfluidic cells was built and optimized by the finite element method (FEM). The electrode in the microfluidic cell was a flexible screen-printed electrode (SPE) modified with porous Mn2O3 derived from manganese containing metal-organic framework (Mn-MOF)...
December 7, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27931714/host-plant-growth-promotion-and-cadmium-detoxification-in-solanum-nigrum-mediated-by-endophytic-fungi
#10
Abdur Rahim Khan, Ihsan Ullah, Muhammad Waqas, Gun-Seok Park, Abdul Latif Khan, Sung-Jun Hong, Rehman Ullah, Byung Kwon Jung, Chang Eon Park, Shafiq Ur-Rehman, In-Jung Lee, Jae-Ho Shin
Current investigation conducted to evaluate the associated fungal endophyte interactions of a Cd hyper-accumulator Solanum nigrum Korean ecotype under varying concentrations of Cd. Two indole-3-acetic acid (IAA) producing fungal strains, RSF-4L and RSF-6L, isolated from the leaves of S. nigrum, were initially screened for Cd tolerance and accumulation potential. In terms of dry biomass production, the strain RSF-6L showed higher tolerance and accumulation capacity for Cd toxicity in comparison to RSF-4L. Therefore, RSF-6L was applied in vivo to S...
February 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27881973/livestock-associated-methicillin-resistant-staphylococcus-aureus-la-mrsa-clonal-complex-cc-398-isolated-from-uk-animals-belong-to-european-lineages
#11
Meenaxi Sharma, Javier Nunez-Garcia, Angela M Kearns, Michel Doumith, Patrick R Butaye, M Angeles Argudín, Angela Lahuerta-Marin, Bruno Pichon, Manal AbuOun, Jon Rogers, Richard J Ellis, Christopher Teale, Muna F Anjum
In recent years, there has been an increase in the number of livestock-associated methicillin resistant Staphylococcus aureus (LA-MRSA) clonal complex (CC) 398 recovered from S. aureus isolated animals in the UK. To determine possible origins of 12 LA-MRSA CC398 isolates collected after screening more than a thousand S. aureus animal isolates from the UK between 2013 and 2015, whole genome sequences (WGS) of CC398 European, including UK, and non-European isolates from diverse animal hosts were compared. Phylogenetic reconstruction applied to WGS data to assess genetic relatedness of all 89 isolates, clustered the 12 UK CC398 LA-MRSA within the European sub-lineages, although on different nodes; implicating multiple independent incursions into the UK, as opposed to a single introduction followed by clonal expansion...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27865763/screening-biological-methods-for-laboratory-scale-stabilization-of-fine-fraction-from-landfill-mining
#12
Tiina J Mönkäre, Marja R T Palmroth, Jukka A Rintala
Increasing interest for the landfill mining and the amount of fine fraction (FF) in landfills (40-70% (w/w) of landfill content) mean that sustainable treatment and utilization methods for FF are needed. For this study FF (<20mm) was mined from a municipal solid waste (MSW) landfill operated from 1967 to 1989. FF, which resembles soil, was stabilized in laboratory scale reactors in two phases: first, anaerobically for 101days and second, for 72days using four different methods: anaerobic with the addition of moisture (water) or inoculum (sewage sludge) and aerobic with continuous water washing, with, or without, bulking material...
November 16, 2016: Waste Management
https://www.readbyqxmd.com/read/27832436/screening-of-heavy-metal-containing-waste-types-for-use-as-raw-material-in-arctic-clay-based-bricks
#13
Louise Josefine Belmonte, Lisbeth M Ottosen, Gunvor Marie Kirkelund, Pernille Erland Jensen, Andreas Peter Vestbø
In the vulnerable Arctic environment, the impact of especially hazardous wastes can have severe consequences and the reduction and safe handling of these waste types are therefore an important issue. In this study, two groups of heavy metal containing particulate waste materials, municipal solid waste incineration (MSWI) fly and bottom ashes and mine tailings (i.e., residues from the mineral resource industry) from Greenland were screened in order to determine their suitability as secondary resources in clay-based brick production...
November 10, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27825829/metagenomics-probing-pollutant-fate-in-natural-and-engineered-ecosystems
#14
REVIEW
Emna Bouhajja, Spiros N Agathos, Isabelle F George
Polluted environments are a reservoir of microbial species able to degrade or to convert pollutants to harmless compounds. The proper management of microbial resources requires a comprehensive characterization of their genetic pool to assess the fate of contaminants and increase the efficiency of bioremediation processes. Metagenomics offers appropriate tools to describe microbial communities in their whole complexity without lab-based cultivation of individual strains. After a decade of use of metagenomics to study microbiomes, the scientific community has made significant progress in this field...
December 2016: Biotechnology Advances
https://www.readbyqxmd.com/read/27822243/screening-the-partial-coding-region-of-metallothionein-isoform-2-gene-in-zebu-cattle
#15
P N Gholap, D S Kale, K Krishnamurthi, A R Sirothia, M D Kothekar
Metallothionein (MT) is important because it binds tightly to heavy metals to decrease their toxicity. DNA was isolated from 30 toxic metal exposed and 30 toxic metal unexposed Zebu cows. The amplified metallothionein isoform-2 (MT-2) PCR product (489 bp) was further used for PCR-RFLP and DNA sequencing. MT-2 TaqI PCR-RFLP revealed homozygous genotype (AA) except for the E23 animal (AB). The genotype frequency of AA and AB (E23) genotypes in the exposed groups was 0.967 and 0.033 respectively. DNA sequencing was carried out for the toxic metal exposed sample (E23) and the control group sample (C13)...
2016: Iranian journal of veterinary research
https://www.readbyqxmd.com/read/27816583/magneto-controlled-aptasensor-for-simultaneous-electrochemical-detection-of-dual-mycotoxins-in-maize-using-metal-sulfide-quantum-dots-coated-silica-as-labels
#16
Chengquan Wang, Jing Qian, Keqi An, Xingyi Huang, Lufang Zhao, Qian Liu, Nan Hao, Kun Wang
Currently there is an urgent need for multi-mycotoxin detection methods due to the co-occurrence of multiple mycotoxins in food raw materials and their augmented toxicity. Herein, a magneto-controlled aptasensor has been developed for simultaneous electrochemical detection of ochratoxin A (OTA) and fumonisin B1 (FB1), two typical mycotoxins found in food crops world-wide. This aptasensor was designed using the high specificity between the target and aptamer with heavy CdTe or PbS quantum dots (QDs) coated silica as labels and the complementary DNA functionalized magnetic beads as capture probes...
March 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27793829/overexpression-of-ole1-enhances-cytoplasmic-membrane-stability-and-confers-resistance-to-cadmium-in-saccharomyces-cerevisiae
#17
Zhijia Fang, Zhongxiang Chen, Song Wang, Ping Shi, Yuhu Shen, Youshang Zhang, Junhua Xiao, Zhiwei Huang
: The heavy metal cadmium is widely used and released into the environment, posing a severe threat to crops and humans. Saccharomyces cerevisiae is one of the most commonly used organisms in the investigation of environmental metal toxicity. We investigated cadmium stress and the adaptive mechanisms of yeast by screening a genome-wide essential gene overexpression library. A candidate gene, OLE1, encodes a delta-9 desaturase and was associated with high anti-cadmium-stress activity. The results demonstrated that the expression of OLE1 was positively correlated with cadmium stress tolerance and induction was independent of Mga2p and Spt23p (important regulatory factors for OLE1)...
January 1, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27774412/100%C3%A2-hz-neutron-radiography-at-the-boa-beamline-using-a-parabolic-focussing-guide
#18
Pavel Trtik, Manuel Morgano, Roman Bentz, Eberhard Lehmann
The recent developments in scientific complementary metal oxide semiconductor (sCMOS) detector technology allow for imaging of relevant processes with very high temporal resolution with practically negligible readout time. However, it is neutron intensity that limits the high temporal resolution neutron imaging. In order to partially overcome the neutron intensity problem for the high temporal resolution imaging, a parabolic neutron focussing guide was utilized in the test arrangement and placed upstream the detector in such a manner that the focal point of the guide was positioned slightly behind the scintillator screen...
2016: MethodsX
https://www.readbyqxmd.com/read/27770327/efficacy-of-indigenous-probiotic-lactobacillus-strains-to-reduce-cadmium-bioaccessibility%C3%A2-an-in-vitro-digestion-model
#19
Narendra Kumar, Vijay Kumar, Rohit Panwar, Chand Ram
The toxic heavy metal cadmium (Cd) appears as one of the major global threats to human and animal health. Human being and aquatic life are exposed to Cd by breathing, eating, or drinking when industrial effluents released into environment. The study was aimed to identify cadmium-binding Lactobacillus strain to reduce its bioaccessibility in in vitro digestion model. In this context, forty-eight lactobacilli strains isolated and characterized from fermented dairy products and human origin were screened for their Cd biosorption potential using Flame Atomic Absorption Spectroscopy (FAAS)...
October 21, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27769905/improved-method-for-effective-screening-of-acc-1-aminocyclopropane-1-carboxylate-deaminase-producing-microorganisms
#20
Chandrashekhar Patil, Rahul Suryawanshi, Sunil Koli, Satish Patil
Aminocyclopropane-1-carboxylate deaminase (ACCD) producing microorganisms support plant growth under a variety of biotic and abiotic stress conditions such as drought, soil salinity, flooding, heavy metal pollution and phyto-pathogen attack. Available screening methods for ACCD give idea only about its primary microbial ACCD activity than the actual potential. In the present investigation, we have simply improved screening method by incorporating pH indicator dyes (phenol red and bromothymol blue) in ACC containing medium...
October 18, 2016: Journal of Microbiological Methods
keyword
keyword
93410
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"