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https://www.readbyqxmd.com/read/28820910/impaired-dendritic-growth-and-positioning-of-cortical-pyramidal-neurons-by-activation-of-aryl-hydrocarbon-receptor-signaling-in-the-developing-mouse
#1
Eiki Kimura, Ken-Ichiro Kubo, Toshihiro Endo, Wenting Ling, Kazunori Nakajima, Masaki Kakeyama, Chiharu Tohyama
The basic helix-loop-helix (bHLH) transcription factors exert multiple functions in mammalian cerebral cortex development. The aryl hydrocarbon receptor (AhR), a member of the bHLH-Per-Arnt-Sim subfamily, is a ligand-activated transcription factor reported to regulate nervous system development in both invertebrates and vertebrates, but the functions that AhR signaling pathway may have for mammalian cerebral cortex development remains elusive. Although the endogenous ligand involved in brain developmental process has not been identified, the environmental pollutant dioxin potently binds AhR and induces abnormalities in higher brain function of laboratory animals...
2017: PloS One
https://www.readbyqxmd.com/read/28820581/a-simple-approach-to-the-visible-light-photoactivation-of-molecular-metal-oxides
#2
Satomi Fujimoto, Jamie M Cameron, Rong-Jia Wei, Katharina Kastner, David Robinson, Victor Sans, Graham N Newton, Hiroki Oshio
This study explores a new method to maximize the visible-light-driven photocatalytic performance of organic-inorganic hybrid polyoxometalates (POMs). Experimental and theoretical investigations of a family of phosphonate-substituted POMs show that modification of grafted organic moieties can be used to tune the electronic structure and photoactivity of the metal oxide component. Unlike fully inorganic polyoxotungstates, these organic-inorganic hybrid species are responsive to visible light and function as photocatalysts (λ > 420 nm) in the decomposition of a model environmental pollutant...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28820023/use-of-oxalic-acid-as-inducer-in-photocatalytic-oxidation-of-cresol-red-in-aqueous-solution-under-natural-and-artificial-light
#3
N Seraghni, I Ghoul, I Lemmize, A Reguig, N Debbache, T Sehili
This work was carried out in the field of water treatment using advanced oxidation processes (AOPs), especially photolysis of carboxylic acid leads to the formation in situ of hydroxyl radical ((.)OH). Cresol red (CR) degradation induced by organic acids/UV system was investigated in aqueous solution. The preliminary study of CR-organic acid mixture in the dark and at room temperature allowed confirming the absence of interaction under our experimental conditions. However, up on irradiation at 365 nm the percentage of elimination of CR was 89% after 5 hours of irradiation...
August 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28819808/mir398-and-mir395-are-involved-in-response-to-so2-stress-in-arabidopsis-thaliana
#4
Lihong Li, Huilan Yi, Meizhao Xue, Min Yi
Sulfur dioxide (SO2) is a common air pollutant that has adverse effects on plants. MicroRNAs (miRNAs) are small noncoding RNA that play critical roles in plant development and stress response. In this study, we found that two miRNAs, miR398 and miR395, were differentially expressed in Arabidopsis shoots under SO2 stress. The expression of miR398 was down-regulated, and the transcript levels of its target genes, Cu/Zn superoxide dismutases (CSD1 and CSD2), were increased during SO2 exposure. The activity of superoxide dismutase (SOD), one of the major antioxidant enzymes, was enhanced with the increase in the CSD transcript level, suggesting an important role of miR398 in response to SO2-induced oxidative stress...
August 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28819546/oxidative-stress-harms-and-benefits-for-human-health
#5
REVIEW
Gabriele Pizzino, Natasha Irrera, Mariapaola Cucinotta, Giovanni Pallio, Federica Mannino, Vincenzo Arcoraci, Francesco Squadrito, Domenica Altavilla, Alessandra Bitto
Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products. ROS can play, and in fact they do it, several physiological roles (i.e., cell signaling), and they are normally generated as by-products of oxygen metabolism; despite this, environmental stressors (i.e., UV, ionizing radiations, pollutants, and heavy metals) and xenobiotics (i.e., antiblastic drugs) contribute to greatly increase ROS production, therefore causing the imbalance that leads to cell and tissue damage (oxidative stress)...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28819498/why-regulatory-indifference-towards-pharmaceutical-pollution-of-the-environment-could-be-a-missed-opportunity-in-public-health-protection-a-holistic-view
#6
Pakoyo Fadhiru Kamba, Bruhan Kaggwa, Edson Ireeta Munanura, Tom Okurut, Freddy Eric Kitutu
The last generation has witnessed bludgeoning of the world's population, a spike in disease burden, and unprecedented levels of pharmaceutical consumption and production. Unfortunately, pharmaceuticals have left their industrial and household confines and leaked into the environment. Pharmaceuticals are now major environmental pollutants, and are ubiquitous in waters and soils. Unlike other environmental contaminants, pharmaceutical pollutants are not yet regulated globally, simply because acute risk assessments show insignificant human health hazard...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819354/mediating-roles-of-ppars-in-the-effects-of-environmental-chemicals-on-sex-steroids
#7
REVIEW
Qiansheng Huang, Qionghua Chen
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated nuclear receptors that are widely involved in various physiological functions. They are widely expressed through the reproductive system. Their roles in the metabolism and function of sex steroids and thus the etiology of reproductive disorders receive great concern. Various kinds of exogenous chemicals, especially environmental pollutants, exert their adverse impact on the reproductive system through disturbing the PPAR signaling pathway...
2017: PPAR Research
https://www.readbyqxmd.com/read/28819316/association-of-ambient-particulate-matter-2-5-with-intensive-care-unit-admission-due-to-pneumonia-a-distributed-lag-non-linear-model
#8
Zhongheng Zhang, Yucai Hong, Ning Liu
Air pollution in China has become a major environmental problem. There is a lack of evidence on the impact of haze (especially PM2.5) on intensive care unit admission due to pneumonia (ICUp). We hypothesized that PM2.5 was independently associated with ICUp and there was a non-linear time lag effect. All ICU admissions occurred from January 1, 2014 to December 31, 2016 in Sir Run-Run Shaw hospital were included in the study. The primary reasons for admission were categorized into pneumonia and non-pneumonia...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819098/protection-and-consolidation-of-stone-heritage-by-self-inoculation-with-indigenous-carbonatogenic-bacterial-communities
#9
Fadwa Jroundi, Mara Schiro, Encarnación Ruiz-Agudo, Kerstin Elert, Inés Martín-Sánchez, María Teresa González-Muñoz, Carlos Rodriguez-Navarro
Enhanced salt weathering resulting from global warming and increasing environmental pollution is endangering the survival of stone monuments and artworks. To mitigate the effects of these deleterious processes, numerous conservation treatments have been applied that, however, show limited efficacy. Here we present a novel, environmentally friendly, bacterial self-inoculation approach for the conservation of stone, based on the isolation of an indigenous community of carbonatogenic bacteria from salt damaged stone, followed by their culture and re-application back onto the same stone...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28818815/mercury-concentrations-in-china-s-coastal-waters-and-implications-for-fish-consumption-by-vulnerable-populations
#10
Yindong Tong, Mengzhu Wang, Xiaoge Bu, Xin Guo, Yan Lin, Huiming Lin, Jing Li, Wei Zhang, Xuejun Wang
We assessed mercury (Hg) pollution in China's coastal waters, including the Bohai Sea, the Yellow Sea, the East China Sea and the South China Sea, based on a nationwide dataset from 301 sampling sites. A methylmercury (MeHg) intake model for humans based on the marine food chain and human fish consumption was established to determine the linkage between water pollutants and the pollutant intake by humans. The predicted MeHg concentration in fish from the Bohai Sea was the highest among the four seas included in the study...
August 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28818814/exposure-to-polybrominated-diphenyl-ethers-and-perfluoroalkyl-substances-in-a-remote-population-of-alaska-natives
#11
Samuel Byrne, Samarys Seguinot-Medina, Pamela Miller, Vi Waghiyi, Frank A von Hippel, C Loren Buck, David O Carpenter
BACKGROUND: Many Alaska Native communities rely on a traditional marine diet that contains persistent organic pollutants (POPs). The indoor environment is also a source of POPs. Polybrominated diphenyl ethers (PBDEs) and perfluoroalkyl substances (PFASs) are present both in the traditional diet and the home indoor environment. OBJECTIVES: We assessed exposure to PBDEs and PFASs among residents of two remote Alaska Native villages on St. Lawrence Island. Ninespine stickleback (Pungitious pungitious) and Alaska blackfish (Dallia pectoralis) were used to detect accumulation of these compounds in the local environment...
August 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28818592/the-impact-of-chemosensitisation-on-bioaccumulation-and-sediment-toxicity
#12
Denise Kurth, Stefan Lips, Riccardo Massei, Martin Krauss, Till Luckenbach, Tobias Schulze, Werner Brack
Cellular multixenobiotic resistance (MXR) transport proteins enhance the efflux of numerous organic pollutants. However, MXR proteins may be blocked or saturated by xenobiotic compounds, acting as inhibitors - also called chemosensitisers. Although effective on a cellular level, the environmental relevance of chemosensitisers has not been conclusively demonstrated. Since sediments are an important source of bioaccumulating compounds in aquatic ecosystems, sediments and sediment-associated hydrophobic pollutants were investigated for their potential to increase exposure and toxicity in the presence of chemosensitisation...
August 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28818587/phenanthrene-responsive-micrornas-and-their-targets-in-wheat-roots
#13
Jinfeng Li, Le Yue, Yu Shen, Yu Sheng, Xinhua Zhan, Guohua Xu, Baoshan Xing
MicroRNAs (miRNAs) play key roles in plant growth, development and responses to abiotic stress. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants. However, it is yet unknown how miRNAs work during PAH uptake by plant roots. Thus, in this study we ascertain phenanthrene (a model PAH)-responsive miRNAs using small RNA high-throughput deep sequencing and their target genes in wheat roots. We identified 108 conserved and non-conserved miRNA members belonging to 82 miRNA families and found 11 differentially expressed miRNAs, among which four miRNAs (miR156, miR164, miR171a and miR9678-3p) were up-regulated and the other seven miRNAs (miR398, miR531, miR1121, miR5048-5p, miR9653b, miR9773 and miR9778) were down-regulated...
August 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28818397/life-cycle-inventory-and-mass-balance-of-municipal-food-waste-management-systems-decision-support-methods-beyond-the-waste-hierarchy
#14
Joel Edwards, Maazuza Othman, Enda Crossin, Stewart Burn
When assessing the environmental and human health impact of a municipal food waste (FW) management system waste managers typically rely on the principles of the waste hierarchy; using metrics such as the mass or rate of waste that is 'prepared for recycling,' 'recovered for energy,' or 'sent to landfill.' These metrics measure the collection and sorting efficiency of a waste system but are incapable of determining the efficiency of a system to turn waste into a valuable resource. In this study a life cycle approach was employed using a system boundary that includes the entire waste service provision from collection to safe end-use or disposal...
August 14, 2017: Waste Management
https://www.readbyqxmd.com/read/28818388/genetic-analysis-of-rootstock-mediated-nitrogen-n-uptake-and-root-to-shoot-signalling-at-contrasting-n-availabilities-in-tomato
#15
M J Asins, A Albacete, C Martinez-Andujar, F Pérez-Alfocea, I C Dodd, E A Carbonell, J A Dieleman
Selecting rootstocks for high nitrogen acquisition ability may allow decreased N fertilizer application without reducing tomato yields, minimizing environmental nitrate pollution. A commercial hybrid tomato variety was grafted on a genotyped population of 130 recombinant inbred lines (RILs) derived from Solanum pimpinellifolium, and compared with self- and non-grafted controls under contrasting nitrate availabilities (13.8 vs 1.0mM) in the nutrient solution. Grafting itself altered xylem sap composition under N-sufficient conditions, particularly Na(+) (8...
October 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28817665/concentrations-of-trace-elements-in-human-milk-comparisons-among-women-in-argentina-namibia-poland-and-the-united-states
#16
Laura D Klein, Alicia A Breakey, Brooke Scelza, Claudia Valeggia, Grazyna Jasienska, Katie Hinde
Human milk contains essential micronutrients for growth and development during early life. Environmental pollutants, such as potentially toxic metals, can also be transferred to the infant through human milk. These elements have been well-studied, but changing diets and environments and advances in laboratory technology require re-examining these elements in a variety of settings. The aim of this study was to characterize the concentrations of essential and toxic metals in human milk from four diverse populations...
2017: PloS One
https://www.readbyqxmd.com/read/28815869/permissible-emission-limit-estimation-via-iterative-back-calculation-case-of-assaluyeh-energy-zone-southern-iran
#17
Hossein Khajehpour, Yadollah Saboohi, George Tsatsaronis
In this research work, an environmental policy procedure for setting a cap on emissions, as a crucial step in any total emission control system, has been provided and evaluated. It is shown that general regulations on emission intensities and rates do not guarantee that ambient air quality standards are met in intense industrial zones. Local emission limits are necessary to meet ambient air quality standards in these zones. To that end, we used dispersion simulators to back-calculate pollutant concentration thresholds for a large and intense energy system in the Assaluyeh region of southern Iran...
August 16, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28815435/recent-trends-in-sustainable-textile-waste-recycling-methods-current-situation-and-future-prospects
#18
REVIEW
Nattha Pensupa, Shao-Yuan Leu, Yunzi Hu, Chenyu Du, Hao Liu, Houde Jing, Huaimin Wang, Carol Sze Ki Lin
In recent years, there have been increasing concerns in the disposal of textile waste around the globe. The growth of textile markets not only depends on population growth but also depends on economic and fashion cycles. The fast fashion cycle in the textile industry has led to a high level of consumption and waste generation. This can cause a negative environmental impact since the textile and clothing industry is one of the most polluting industries. Textile manufacturing is a chemical-intensive process and requires a high volume of water throughout its operations...
August 16, 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28814712/secondary-compound-hypothesis-revisited-selected-plant-secondary-metabolites-promote-bacterial-degradation-of-cis-1-2-dichloroethylene-cdce
#19
Serena Fraraccio, Michal Strejcek, Iva Dolinova, Tomas Macek, Ondrej Uhlik
Cis-1,2-dichloroethylene (cDCE), which is a common hazardous compound, often accumulates during incomplete reductive dechlorination of higher chlorinated ethenes (CEs) at contaminated sites. Simple monoaromatics, such as toluene and phenol, have been proven to induce biotransformation of cDCE in microbial communities incapable of cDCE degradation in the absence of other carbon sources. The goal of this microcosm-based laboratory study was to discover non-toxic natural monoaromatic secondary plant metabolites (SPMEs) that could enhance cDCE degradation in a similar manner to toluene and phenol...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814454/air-pollution-as-a-catalyst-for-supporting-tobacco-control-policies-evidence-from-a-nationwide-study-on-chinese-medical-students
#20
Xiaozhao Yousef Yang, Tingzhong Yang, Fanhao Nie
PURPOSE: Few studies have discussed how the increasing ambient air pollution may affect policy-related attitudes. Medical professionals constitute an important interest group who analyse and solve public issues within a medicalised framework. The current study investigates whether ambient air pollution is associated with a greater likelihood of supporting tobacco control measures among medical students. METHODS: We conducted multistage sampling among the medical students from 42 cities in China...
August 16, 2017: Tobacco Control
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