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https://www.readbyqxmd.com/read/28110454/tackling-the-salinity-pollution-nexus-in-coastal-aquifers-from-arid-regions-using-nitrate-and-boron-isotopes
#1
V Re, E Sacchi
Salinization and nitrate pollution are generally ascertained as the main issues affecting coastal aquifers worldwide. In arid zones, where agricultural activities also result in soil salinization, both phenomena tend to co-exist and synergically contribute to alter groundwater quality, with severe negative impacts on human populations and natural ecosystems' wellbeing. It becomes therefore necessary to understand if and to what extent integrated hydrogeochemical tools can help in distinguishing among possible different salinization and nitrate contamination origins, in order to provide adequate science-based support to local development and environmental protection...
January 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28110163/evaluation-of-remediation-techniques-in-soils-affected-by-residual-contamination-with-heavy-metals-and-arsenic
#2
M García-Carmona, A Romero-Freire, M Sierra Aragón, F J Martínez Garzón, F J Martín Peinado
Residual soil pollution from the Aznalcóllar mine spill is still a problem in some parts of the affected area, today converted in the Guadiamar Green Corridor. Dispersed spots of polluted soils, identified by the absence of vegetation, are characterized by soil acid pH and high concentrations of As, Pb, Cu and Zn. Ex situ remediation techniques were performed with unrecovered soil samples. Landfarming, Composting and Biopiles techniques were tested in order to immobilize pollutants, to improve soil properties and to promote vegetation recovery...
January 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28110148/ciprofloxacin-induces-oxidative-stress-in-duckweed-lemna-minor-l-implications-for-energy-metabolism-and-antibiotic-uptake-ability
#3
Marcelo Pedrosa Gomes, Cíntia Almeida Gonçalves, Júlio César Moreira de Brito, Amanda Miranda Souza, Fernanda Vieira da Silva Cruz, Elisa Monteze Bicalho, Cleber Cunha Figueredo, Queila Souza Garcia
We investigate the physiological responses and antibiotic-uptake capacity of Lemna minor exposed to ciprofloxacin. Ciprofloxacin (Cipro) induced toxic effects and hormesis in plants by significantly modifying photosynthesis and respiration pathways. A toxic effect was induced by a concentration ≥1.05mg ciprofloxacin l(-1) while hormesis occurs at the lowest concentration studied (0.75mg ciprofloxacin l(-1)). By impairing normal electron flow in the respiratory electron transport chain, ciprofloxacin induces hydrogen peroxide (H2O2) production...
January 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28110017/remediation-efficiency-of-three-treatments-on-water-polluted-with-endocrine-disruptors-assessment-by-means-of-in%C3%A2-vitro-techniques
#4
Juliana Polloni-Silva, Ana Valdehita, Renata Fracácio, José M Navas
Chemical substances with potential to disrupt endocrine systems have been detected in aquatic environments worldwide, making necessary the investigation about water treatments able to inhibit such potential. The present work aimed to assess the efficiency for removing endocrine disruptors (with estrogenic and androgenic activity) of three simple and inexpensive substrates that could be potentially used in sectors or regions with limited resources: powdered activated carbon (PAC), powdered natural zeolite (ZEO) (both at a concentration of 500 mg L(-1)) and natural aquatic humic substances (AHS) (at 30 mg L(-1))...
January 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28110012/interaction-effects-and-mechanism-of-pb-pollution-and-soil-microorganism-in-the-presence-of-earthworm
#5
Gao Liu, Siyuan Ling, Xiuping Zhan, Zhifen Lin, Wei Zhang, Kuangfei Lin
Heavy metals usually cause great damage to soil ecosystem. Lead (Pb) was chosen as a research object in the present study. Here repeated exposure of Pb was designed for the soil artificially contaminated. A laboratory study was conducted to determine the changes in the Pb availability and biological activity in the presence of earthworm, and the risk assessment code (RAC) was applied to evaluate the remediated soil. Results demonstrated that Pb gradually transformed to more stable fractions (OMB- and FeMnOX-Pb) under microbial action, indicating the risk level of Pb was declined...
January 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28110008/typha-latifolia-as-potential-phytoremediator-of-2-4-dichlorophenol-analysis-of-tolerance-uptake-and-possible-transformation-processes
#6
M C Rodriguez-Hernandez, R F García De la-Cruz, E Leyva, G Navarro-Tovar
2,4-Dichlorophenol (2,4-DCP) is considered a priority pollutant due to its high toxicity. Therefore, it is urgent to develop technologies for the disposal of this pollutant. Various remediation processes have been proposed for the elimination of 2,4-DCP in contaminated water, however, most of them involve high costs of operation and maintenance. This study aimed to determine the capacity of remediation of 2,4-DCP in water by Typha latifolia L. wild plants. For that, the tolerance, removal, accumulation and biotransformation of 2,4-DCP by T...
January 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28109630/analytical-model-for-the-design-of-in-situ-horizontal-permeable-reactive-barriers-hprbs-for-the-mitigation-of-chlorinated-solvent-vapors-in-the-unsaturated-zone
#7
Iason Verginelli, Oriana Capobianco, Niels Hartog, Renato Baciocchi
In this work we introduce a 1-D analytical solution that can be used for the design of horizontal permeable reactive barriers (HPRBs) as a vapor mitigation system at sites contaminated by chlorinated solvents. The developed model incorporates a transient diffusion-dominated transport with a second-order reaction rate constant. Furthermore, the model accounts for the HPRB lifetime as a function of the oxidant consumption by reaction with upward vapors and its progressive dissolution and leaching by infiltrating water...
January 10, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28108789/-surgical-indications-and-complications-management-in-vestibular-schwannoma
#8
S Rosahl, D Eßer
BACKGROUND: Recent surgical treatment concepts for patients with vestibular schwannoma (VS) require an interdisciplinary approach as well as recognition and mastering of complications. OBJECTIVE: This paper provides an overview of indications, as well as possible options for function preservation and management of complications in the surgical resection of these tumors. METHODS: Up-to-date treatment concepts and surgical indications were differentiated according to size and extent of tumors...
January 20, 2017: HNO
https://www.readbyqxmd.com/read/28108376/emodin-a-compound-with-putative-antidiabetic-potential-deteriorates-glucose-tolerance-in-rodents
#9
Sameer Abu Eid, Michael Adams, Thomas Scherer, Héctor Torres-Gómez, Martina Theresa Hackl, Mairam Kaplanian, Rainer Riedl, Anton Luger, Clemens Fürnsinn
Emodin is found in remedies from Traditional Chinese Medicine. Since antihyperglycaemic action was observed in rodents, non-scientific sources advertise emodin intake as a natural cure for diabetes. Emodin was admixed to high fat-food of obese mice at two doses (2 and 5g/kg; daily emodin uptake 103 and 229mg/kg). Comparison was made to ad libitum fed and to food restricted control groups, the latter showing the same weight gain as the corresponding emodin-treated groups. Emodin blunted food intake by 6% and 20% for the low and high dose, which was accompanied by proportionate reductions in weight gain...
January 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28108162/in-situ-degradation-of-soil-sorbed-17%C3%AE-estradiol-using-carboxymethyl-cellulose-stabilized-manganese-oxide-nanoparticles-column-studies
#10
Bing Han, Man Zhang, Dongye Zhao
This work tested a new remediation technology for in-situ degradation of estrogens by delivering a new class of stabilized manganese oxide (MnO2) nanoparticles in contaminated soils. The nanoparticles were prepared using a food-grade carboxymethyl cellulose (CMC) as a stabilizer, which was able to facilitate particle delivery into soil. The effectiveness of the technology was tested using 17β-estradiol (E2) as a model estrogen and three sandy loams (SL1, SL2, and SL3) as model soils. Column transport tests showed that the nanoparticles can be delivered in the three soils, though retention of the nanoparticles varied...
January 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28107097/comparison-of-systemic-and-topical-hypericum-perforatum-on-diabetic-surgical-wounds
#11
Mehmet Altıparmak, Teoman Eskitaşçıoğlu
BACKGROUND: Surgical wounds in diabetic patients still remain a problem till the present day. As a common plant found around the world, Hypericum perforatum L. (Hypericaceae) is traditionally prepared as an oily extract and used as a folk remedy for various diseases such as wounds, burns, cuts, etc. This study aims to evaluate the effect of St. John's wort (Hypericum perforatum) on problematic wounds while comparing oral and topical applications. METHODS: Incisional and excisional wound models were made on the dorsal regions of 54 diabetic Spraque-Dawley rats...
January 20, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28106988/factors-governing-the-performance-of-bauxite-for-fluoride-remediation-of-groundwater
#12
Aruna Kirani Katyayani Cherukumilli, Caroline Delaire, Susan E Amrose, Ashok J Gadgil
Globally, 200 million people drink groundwater contaminated with fluoride concentrations exceeding the World Health Organization's recommended level (WHO-MCL =1.5 mg F-/L). This study investigates the use of minimally-processed (dried/milled) bauxite ore as an inexpensive adsorbent for remediating fluoride-contaminated groundwater in resource-constrained areas. Adsorption experiments in synthetic groundwater using bauxites from Guinea, Ghana, USA, and India as single-use batch dispersive media demonstrated that doses of ~10-23 g/L could effectively remediate 10 mg F-/L...
January 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28106848/a-new-strategy-for-heavy-metal-polluted-environments-a-review-of-microbial-biosorbents
#13
REVIEW
Ayansina Segun Ayangbenro, Olubukola Oluranti Babalola
Persistent heavy metal pollution poses a major threat to all life forms in the environment due to its toxic effects. These metals are very reactive at low concentrations and can accumulate in the food web, causing severe public health concerns. Remediation using conventional physical and chemical methods is uneconomical and generates large volumes of chemical waste. Bioremediation of hazardous metals has received considerable and growing interest over the years. The use of microbial biosorbents is eco-friendly and cost effective; hence, it is an efficient alternative for the remediation of heavy metal contaminated environments...
January 19, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28106812/are-cockroaches-an-important-source-of-indoor-endotoxins
#14
Ka Man Lai
Endotoxins are common indoor biocontaminants. Their levels have been shown to link to many sources and factors. One of them is cockroach infestation but the role of cockroaches and contamination mechanisms are unclear. We hypothesized that not only is cockroach infestation a sign of poor hygiene, but it also contributes to indoor endotoxins via fecal contamination. In this study, different cockroach species were caught in homes. The endotoxin and allergen levels and their ratios in cockroach feces were determined...
January 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28106790/contributions-of-letter-speech-sound-learning-and-visual-print-tuning-to-reading-improvement-evidence-from-brain-potential-and-dyslexia-training-studies
#15
REVIEW
Gorka Fraga González, Gojko Žarić, Jurgen Tijms, Milene Bonte, Maurits W van der Molen
We use a neurocognitive perspective to discuss the contribution of learning letter-speech sound (L-SS) associations and visual specialization in the initial phases of reading in dyslexic children. We review findings from associative learning studies on related cognitive skills important for establishing and consolidating L-SS associations. Then we review brain potential studies, including our own, that yielded two markers associated with reading fluency. Here we show that the marker related to visual specialization (N170) predicts word and pseudoword reading fluency in children who received additional practice in the processing of morphological word structure...
January 18, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28106783/extract-of-polygala-tenuifolia-alleviates-stress-exacerbated-atopy-like-skin-dermatitis-through-the-modulation-of-protein-kinase-a-and-p38-mitogen-activated-protein-kinase-signaling-pathway
#16
Bongjun Sur, Bombi Lee, Ye Seul Yoon, Pooreum Lim, Riwon Hong, Mijung Yeom, Hyang Sook Lee, Hijoon Park, Insop Shim, Hyejung Lee, Young Pyo Jang, Dae-Hyun Hahm
Atopic dermatitis (AD) and stress create a vicious cycle: stress exacerbates atopic symptoms, and atopic disease elicits stress and anxiety. Targeting multiple pathways including stress and allergic inflammation is, therefore, important for treating AD. In this study, we investigated the remedial value of Polygala tenuifolia Willd. (PTW) for treating immobilization (IMO) stress-exacerbated atopy-like skin dermatitis and its underlying mechanism. Trimellitic anhydride (TMA) was applied to dorsal skin for sensitization and subsequently both ears for eliciting T-cell-dependent contact hypersensitivity in mice, which underwent 2 h-IMO stress and PTW administration for the latter 6 and 9 days in the ear exposure period of TMA, respectively...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106048/simulating-the-hydrologic-cycle-in-coal-mining-subsidence-areas-with-a-distributed-hydrologic-model
#17
Jianhua Wang, Chuiyu Lu, Qingyan Sun, Weihua Xiao, Guoliang Cao, Hui Li, Lingjia Yan, Bo Zhang
Large-scale ground subsidence caused by coal mining and subsequent water-filling leads to serious environmental problems and economic losses, especially in plains with a high phreatic water level. Clarifying the hydrologic cycle in subsidence areas has important practical value for environmental remediation, and provides a scientific basis for water resource development and utilisation of the subsidence areas. Here we present a simulation approach to describe interactions between subsidence area water (SW) and several hydrologic factors from the River-Subsidence-Groundwater Model (RSGM), which is developed based on the distributed hydrologic model...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28105531/-big-eye-surgery-the-ethics-of-medicalizing-asian-features
#18
Yves Saint James Aquino
The popularity of surgical modifications of race-typical features among Asian women has generated debates on the ethical implications of the practice. Focusing on blepharoplasty as a representative racial surgery, this article frames the ethical discussion by viewing Asian cosmetic surgery as an example of medicalization, which can be interpreted in two forms: treatment versus enhancement. In the treatment form, medicalization occurs by considering cosmetic surgery as remedy for pathologized Asian features; the pathologization usually occurs in reference to western features as the norm...
January 19, 2017: Theoretical Medicine and Bioethics
https://www.readbyqxmd.com/read/28103873/masquelier-s-grape-seed-extract-from-basic-flavonoid-research-to-a-well-characterized-food-supplement-with-health-benefits
#19
REVIEW
Antje R Weseler, Aalt Bast
Careful characterization and standardization of the composition of plant-derived food supplements is essential to establish a cause-effect relationship between the intake of that product and its health effect. In this review we follow a specific grape seed extract containing monomeric and oligomeric flavan-3-ols from its creation by Jack Masquelier in 1947 towards a botanical remedy and nutraceutical with proven health benefits. The preparation's research history parallels the advancing insights in the fields of molecular biology, medicine, plant and nutritional sciences during the last 70 years...
January 19, 2017: Nutrition Journal
https://www.readbyqxmd.com/read/28103776/small-and-hungry-micrornas-in-micronutrient-homeostasis-of-plants
#20
Prashanti Patel, Karuna Yadav, Thumballi Ramabhatta Ganapathi
MicroRNAs are emerging players in plant development and response to stresses, both biotic and abiotic such as micronutrient deficiency. These small RNAs regulate cognate downstream targets either by transcript cleavage or translational inhibition. Micronutrient deficiencies lead to poor quality and yield of crops and impaired human health. Over the years several microRNAs have been identified which regulate expression of genes controlling uptake, mobilization and homeostasis of macronutrients such as nitrogen, phosphorus and sulfur to ensure sufficiency without toxicity...
January 17, 2017: MicroRNA
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