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https://www.readbyqxmd.com/read/28550601/potential-toxicity-of-trace-elements-and-nanomaterials-to-chinese-cabbage-in-arsenic-and-lead-contaminated-soil-amended-with-biochars
#1
Yasser Mahmoud Awad, Meththika Vithanage, Nabeel Khan Niazi, Muhammad Rizwan, Jörg Rinklebe, Jae E Yang, Yong Sik Ok, Sang Soo Lee
To our knowledge, this is the first report on exploring the interactive effects of various biochars (BCs) and nanomaterials (NMs) on plant growth and bioavailability of trace elements in soil. This study evaluated the bioavailability and toxicity of arsenic (As), lead (Pb), and NMs to cabbage plants. The BCs were produced from rice husk (RB), sewage sludge, and bamboo wood (WB). The BCs at 2.5 and 5% (w w(-1)), NMs for removing As (NMs-As) and heavy metals (NMs-HM) at 3000 mg kg(-1), and multi-walled carbon nanotubes (CNT) at 1000 mg kg(-1) were applied in bioassay and incubation experiments (40 days), along with the unamended soil as the control...
May 26, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550339/effect-of-fungal-endophytes-on-biomass-yield-nutritive-value-and-accumulation-of-minerals-in-ornithopus-compressus
#2
Oscar Santamaria, Santiago Lledó, Sara Rodrigo, Maria J Poblaciones
Yellow serradella (Ornithopus compressus), a valuable pasture species in Mediterranean areas, presents a high diversity of endophytic mycoflora. In the present work, the hypothesis of a significant effect of fungal endophytic species on the parameters of forage production, nutritive value and mineral status of herbage was tested. O. compressus plants were inoculated with each of seven endophytes (four in 2012/2013 and three in 2013/2014). After inoculation, two experiments (under greenhouse and field conditions) were established...
May 27, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28547667/metalloproteomics-approach-to-analyze-mercury-in-breast-milk-and-hair-samples-of-lactating-women-in-communities-of-the-amazon-basin-brazil
#3
M R Cerbino, José Cavalcante Souza Vieira, C P Braga, G Oliveira, I F Padilha, T M Silva, L F Zara, N J Silva, P M Padilha
Mercury is a potentially toxic element that is present in the environment of the Brazilian Amazon and is responsible for adverse health effects in humans. This study sought to assess possible protein biomarkers of mercury exposure in breast milk samples from lactating women in the Madeira and Negro Rivers in the Brazilian Amazon. The mercury content of hair samples of lactating women was determined, and the proteome of breast milk samples was obtained using two-dimensional electrophoresis after protein precipitation with acetone...
May 25, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28546898/treatment-of-fly-ash-from-power-plants-using-thermal-plasma
#4
Sulaiman Al-Mayman, Ibrahim AlShunaifi, Abdullah Albeladi, Imed Ghiloufi, Saud Binjuwair
Fly ash from power plants is very toxic because it contains heavy metals. In this study fly ash was treated with a thermal plasma. Before their treatment, the fly ash was analyzed by many technics such as X-ray fluorescence, CHN elemental analysis, inductively coupled plasma atomic emission spectroscopy and scanning electron microscopy. With these technics, the composition, the chemical and physical proprieties of fly ash are determined. The results obtained by these analysis show that fly ash is mainly composed of carbon, and it contains also sulfur and metals such as V, Ca, Mg, Na, Fe, Ni, and Rh...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28544612/ecology-adaptation-and-function-of-methane-sulfidic-spring-water-biofilm-microorganisms-including-a-strain-of-anaerobic-fungus-mucor-hiemalis
#5
Enamul Hoque, Johannes Fritscher
Ecological aspects, adaptation, and some functions of a special biofilm and its unique key anaerobic fungus Mucor hiemalis strain EH11 isolated from a pristine spring (Künzing, Bavaria, Germany) are described. The spring's pure nature is characterized by, for example, bubbling methane, marine-salinity, mild hydrothermal (~19.1°C), sulfidic, and reductive-anoxic (Eh : -241 to -253 mV, O2 : ≤ 0.1 mg/L) conditions. It is geoecologically located at the border zone between Bavarian Forest (crystalline rocky mountains) and the moor-like Danube River valley, where geological displacements bring the spring's water from the deeper layers of former marine sources up to the surface...
May 24, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28542246/a-drastic-superoxide-dependent-oxidative-stress-is-prerequisite-for-the-down-regulation-of-irp1-insights-from-studies-on-sod1-deficient-mice-and-macrophages-treated-with-paraquat
#6
Anna Milczarek, Rafał R Starzyński, Agnieszka Styś, Aneta Jończy, Robert Staroń, Agnieszka Grzelak, Paweł Lipiński
Iron regulatory protein 1 (IRP1) is a cytosolic bifunctional [4Fe-4S] protein which exhibits aconitase activity or binds iron responsive elements (IREs) in untranslated regions of specific mRNA encoding proteins involved in cellular iron metabolism. Superoxide radical (O2.-) converts IRP1 from a [4Fe-4S] aconitase to a [3Fe-4S] "null" form possessing neither aconitase nor trans-regulatory activity. Genetic ablation of superoxide dismutase 1 (SOD1), an antioxidant enzyme that acts to reduce O2.- concentration, revealed a new O2...
2017: PloS One
https://www.readbyqxmd.com/read/28540557/dissolution-of-steel-slags-in-aqueous-media
#7
Shashikant Yadav, Anurag Mehra
Steel slag is a major industrial waste in steel industries, and its dissolution behavior in water needs to be characterized in the larger context of its potential use as an agent for sequestering CO2. For this purpose, a small closed system batch reactor was used to conduct the dissolution of steel slags in an aqueous medium under various dissolution conditions. In this study, two different types of steel slags were procured from steel plants in India, having diverse structural features, mineralogical compositions, and particle sizes...
May 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28537731/reaction-of-spring-barley-and-common-radish-on-the-introduction-of-ionic-liquids-containing-asymmetric-cations-to-the-soil
#8
Barbara Pawłowska, Arkadiusz Telesiński, Maciej Płatkowski, Michał Stręk, Martyna Śnioszek, Robert Biczak
The harmful effect of ionic liquids (ILs) on the environment is one of the important elements of scientific research conducted around the world. This study presents the effect of ionic liquids, containing the asymmetric cations benzyltrimethylammonium chloride [BenzTMA][Cl] and benzyltriethylammonium chloride[BenzTEA][Cl], on physiological and biochemical changes in common radish plants and spring barley seedlings. The examined ILs demonstrated low toxicity to higher plants. A compound that exhibiting higher phytotoxicity to these plant species was [BenzTMA][Cl]...
May 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28537708/nonsynonymous-polymorphisms-in-the-human-as3mt-arsenic-methylation-gene-implications-for-arsenic-toxicity
#9
Jiaojiao Li, Charles Packianathan, Toby G Rossman, Barry P Rosen
Arsenic methylation, the primary biotransformation in the human body, is catalyzed by the enzyme As(III) S-adenosylmethionine (SAM) methyltransferases (hAS3MT). This process is thought to be protective from acute high-level arsenic exposure. However, with long term low-level exposure, hAS3MT produces intracellular methylarsenite (MAs(III)) and dimethylarsenite (DMAs(III)), which are considerably more toxic than inorganic As(III) and may contribute to arsenic-related diseases. Several single nucleotide polymorphisms (SNPs) in putative regulatory elements of the hAS3MT gene have been shown to be protective...
May 24, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28536673/two-partner-secretion-combining-efficiency-and-simplicity-in-the-secretion-of-large-proteins-for-bacteria-host-and-bacteria-bacteria-interactions
#10
REVIEW
Jeremy Guérin, Sarah Bigot, Robert Schneider, Susan K Buchanan, Françoise Jacob-Dubuisson
Initially identified in pathogenic Gram-negative bacteria, the two-partner secretion (TPS) pathway, also known as Type Vb secretion, mediates the translocation across the outer membrane of large effector proteins involved in interactions between these pathogens and their hosts. More recently, distinct TPS systems have been shown to secrete toxic effector domains that participate in inter-bacterial competition or cooperation. The effects of these systems are based on kin vs. non-kin molecular recognition mediated by specific immunity proteins...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28535971/comparative-analysis-of-two-ferritin-subunits-from-blunt-snout-bream-megalobrama-amblycephala-characterization-expression-iron-depriving-and-bacteriostatic-activity
#11
Zhujin Ding, Xiaoheng Zhao, Qifeng Zhan, Lei Cui, Qianhui Sun, Weimin Wang, Hong Liu
Iron is an essential microelement for almost all living organisms, while an excess of iron is toxic, thus maintenance of iron homeostasis is vital. As iron storage protein, ferritin plays an important role in iron metabolism. In the present study, we cloned and characterized the ferritin H subunit from Megalobrama amblycephala, termed as MamFerH. An iron-responsive element (IRE) was predicted in the 5' untranslated region (UTR) of MamFerH, while its bulge structural was different from that of the reported ferritin M subunit (MamFerM)...
May 20, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28534636/annealing-induced-shape-transformation-of-czts-nanorods-based-thin-films
#12
Govind Rajesh, Natarajan Muthukumarasamy, Dhayalan Velauthapillai, Sudip Kumar K Batabyal
Here we studied the annealing induced shape transformation of 1-D Cu2ZnSnS4 (CZTS) nanorods from nanospheres and nanocubes by simple sol-gel method without using any toxic chemicals or complicated vacuum based technology. X-ray diffraction pattern and Raman Spectra reveals the formation of Kesterite structure CZTS thin films. The energy dispersive X-ray analysis results indicate the presence of Cu, Zn, Sn and S. The elemental distribution of all the CZTS samples was studied using elemental mapping. The Hall effect studies of the CZTS thin film composed of nanorods exhibits the lowest resistivity values which indicates efficient charge transfer for unidirectional structure...
May 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28534099/effects-of-intermittent-and-continuous-magnetic-fields-on-trace-element-levels-in-guinea-pigs
#13
Onur Erdem, Cemal Akay, Sule Coşkun Cevher, Ayse Gulnihal Canseven, Ahmet Aydın, Nesrin Seyhan
Electromagnetic fields (EMFs) can affect living cells due to biochemical changes, followed by changes in levels of trace elements in serum and different organs. This study focuses on the effect of whole body exposure to EMF, presented everywhere in our environment, and on the levels of trace elements in serum, femur, brain, kidney, and liver tissues. The analyses performed on 29 guinea pigs were divided into five groups. Guinea pigs were exposed to a magnetic field of 50 Hz of 1.5 mT. Groups A and B were exposed to the magnetic field for a period of 4 h/day continuously (4 h/day) for 4 and 7 days, respectively...
May 22, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28532901/long-term-surveillance-of-zinc-implant-in-murine-artery-surprisingly-steady-biocorrosion-rate
#14
Adam Drelich, Shan Zhao, Roger J Guillory, Jaroslaw W Drelich, Jeremy Goldman
Metallic zinc implanted into the abdominal aorta of rats out to 6 months has been demonstrated to degrade while avoiding responses commonly associated with the restenosis of vascular implants. However, major questions remain regarding whether a zinc implant would ultimately passivate through the production of stable corrosion products or via a cell mediated fibrous encapsulation process that prevents the diffusion of critical reactants and products at the metal surface. Here, we have conducted clinically relevant long term in vivo studies in order to characterize late stage zinc implant biocorrosion behavior and products to address these critical questions...
May 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28532595/impact-of-elemental-iron-on-human-spermatozoa-and-mouse-embryonic-development-in-a-defined-synthetic-culture-medium
#15
Safaa M Naes, Oshini Basri, Fauziah Ismail, Ghofraan A Ata'Allah, Siti Khadijah Idris, Noor Azmi Mat Adenan, Jaffar Ali
There is a paucity of studies on effect of iron in embryo culture procedures. This study aims to ascertain the optimal, tolerance and toxic levels of iron in a protein-free embryo culture medium (PFM) to determine the effect of iron on embryonic development. The application of PFM in assisted reproductive technologies (ART) is intended to eliminate disease transmission and improve ART treatment outcome. The optimal, tolerance and toxic levels of iron on human spermatozoa and mouse embryos were determined by challenging them with different levels of iron (ferric iron; Fe(+3))...
May 19, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28531998/reline-assisted-green-and-facile-synthesis-of-fluorapatite-nanoparticles
#16
Mohammad Karimi, Majid Rastegar Ramsheh, Seyed Mohammad Ahmadi, Mohammad Reza Madani, Mehdi Shamsi, Reyhaneh Reshadi, Farahnaz Lotfi
A fast, simple and sustainable method based on choline chloride-urea deep eutectic solvent (known as Reline) was employed to synthesize nanosized fluorapatite (FA) particles. Using XRD, FESEM, TEM, EDS, and FTIR, the formation of FA nanoparticles with average crystal size of ~34nm, percent crystallinity of 93%, particle size of ~45nm, and high crystal, elemental, and structural purity was confirmed. The MTT cytotoxicity assay endorsed the non-toxicity of as-synthesized FA nanoparticles. The good biocompatibility, osteogenity and mineralization ability of as-synthesized FA nanoparticles were confirmed by Alizarin red staining, Acridine orange staining and ALP activity tests...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531955/influence-of-sediment-chemistry-and-sediment-toxicity-on-macroinvertebrate-communities-across-99-wadable-streams-of-the-midwestern-usa
#17
Patrick W Moran, Lisa H Nowell, Nile E Kemble, Barbara J Mahler, Ian R Waite, Peter C Van Metre
Simultaneous assessment of sediment chemistry, sediment toxicity, and macroinvertebrate communities can provide multiple lines of evidence when investigating relations between sediment contaminants and ecological degradation. These three measures were evaluated at 99 wadable stream sites across 11 states in the Midwestern United States during the summer of 2013 to assess sediment pollution across a large agricultural landscape. This evaluation considers an extensive suite of sediment chemistry totaling 274 analytes (polycyclic aromatic hydrocarbons, organochlorine compounds, polychlorinated biphenyls, polybrominated diphenyl ethers, trace elements, and current-use pesticides) and a mixture assessment based on the ratios of detected compounds to available effects-based benchmarks...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28530587/trace-elements-in-raw-milk-of-buffaloes-bubalus-bubalis-from-campania-italy
#18
Mauro Esposito, Oto Miedico, Stefania Cavallo, Roberta Pellicanò, Guido Rosato, Loredana Baldi, A Eugenio Chiaravalle
The profile of 18 trace elements was traced in 68 milk samples collected from buffalo farms in the territory known as the "Land of Fires" in the Campania region (Italy). This area has been polluted by the illegal dumping in fields of industrial or domestic waste, wich is sometimes then burned spreading toxic contaminants. Milk from buffaloes raised on rural farms might be a good indicator of environmental contamination risk in the human food chain. Trace element analysis in milk was performed using mass spectrometry...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530279/bifunctional-antimicrobial-conjugates-and-hybrid-antimicrobials
#19
REVIEW
P Klahn, M Brönstrup
Covering: up to the end of 2016Novel antimicrobial drugs are continuously needed to counteract bacterial resistance development. An innovative molecular design strategy for novel antibiotic drugs is based on the hybridization of an antibiotic with a second functional entity. Such conjugates can be grouped into two major categories. In the first category (antimicrobial hybrids), both functional elements of the hybrid exert antimicrobial activity. Due to the dual targeting, resistance development can be significantly impaired, the pharmacokinetic properties can be superior compared to combination therapies with the single antibiotics, and the antibacterial potency is often enhanced in a synergistic manner...
May 22, 2017: Natural Product Reports
https://www.readbyqxmd.com/read/28529816/sclerostin-activity-plays-a-key-role-in-the-negative-effect-of-glucocorticoid-signaling-on-osteoblast-function-in-mice
#20
Eric E Beier, Tzong-Jen Sheu, Emily A Resseguie, Masahiko Takahata, Hani A Awad, Deborah A Cory-Slechta, J Edward Puzas
Stress during prenatal development is correlated with detrimental cognitive and behavioral outcomes in offspring. However, the long-term impact of prenatal stress (PS) and disrupted glucocorticoid signaling on bone mass and strength is not understood. In contrast, the detrimental effect of lead (Pb) on skeletal health is well documented. As stress and Pb act on common biological targets via glucocorticoid signaling pathways and co-occur in the environment, this study first sought to assess the combined effect of stress and Pb on bone quality in association with alterations in glucocorticoid signaling...
2017: Bone Research
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