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https://www.readbyqxmd.com/read/28743092/polycyclic-aromatic-hydrocarbons-pahs-enrich-their-degrading-genera-and-genes-in-human-impacted-aquatic-environments
#1
Ke Yuan, Baowei Chen, Qing Qing, Shichun Zou, Xiaowei Wang, Tiangang Luan
Bacterial degradation is an important clearance pathway for organic contaminants from highly human-impacted environments. However, it is not fully understood how organic contaminants are selected for degradation by bacteria and genes in aquatic environments. In this study, PAH degrading bacterial genera and PAH-degradation-related genes (PAHDGs) in sediments collected from the Pearl River (PR), the Pearl River Estuary (PRE) and the South China Sea (SCS), among which there were distinct differences in anthropogenic impact, were analyzed using metagenomic approaches...
July 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28743008/wastewater-contamination-in-antarctic-melt-water-streams-evidenced-by-virological-and-organic-molecular-markers
#2
L F L Tort, K Iglesias, C Bueno, A Lizasoain, M Salvo, J Cristina, N Kandratavicius, L Pérez, R Figueira, M C Bícego, S Taniguchi, N Venturini, E Brugnoli, R Colina, M Victoria
Human activities in the Antarctica including tourism and scientific research have been raised substantially in the last century with the concomitant impact on the Antarctic ecosystems through the release of wastewater mainly from different scientific stations activities. The aim of this study was to assess the wastewater contamination of surface waters and sediments of three melt-water streams (11 sites) by leaking septic tanks located in the vicinity of the Uruguayan Scientific Station in the Fildes Peninsula, King George Island, Antarctica, during summer 2015...
July 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28742338/advanced-materials-technologies-and-complex-systems-analyses-emerging-opportunities-to-enhance-urban-water-security
#3
Katherine R Zodrow, Qilin Li, Regina M Buono, Wei Chen, Glenn Daigger, Leonardo Duenas-Osorio, Menachem Elimelech, Xia Huang, Guibin Jiang, Jae-Hong Kim, Bruce E Logan, David L Sedlak, Paul Westerhoff, Pedro J J Alvarez
Innovation in urban water systems is required to address the increasing demand for clean water due to population growth and aggravated water stress caused by water pollution, aging infrastructure, and climate change. Advances in materials science, modular water treatment technologies, and complex systems analyses, coupled with the drive to minimize the energy and environmental footprints of cities, provide new opportunities to ensure a resilient and safe water supply. We present a vision for enhancing efficiency and resiliency of urban water systems and discuss approaches and research needs for overcoming associated implementation challenges...
July 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28741802/cytogenetic-tests-for-animal-production-state-of-the-art-and-perspectives
#4
REVIEW
I Udroiu, A Sgura
Cytogenetic tests are effective tools for monitoring the health status of livestock and improving their genetic value. Cytogenetic screening allows for the detection of animals carrying chromosomal aberrations and to avoid using them as breeders. Progress in karyotype monitoring, with new molecular probes and automation, has greatly increased the productivity of this procedure. Several genotoxicity tests are available to detect the possible presence and effects of pollutants or drugs. Among these, the micronucleus test and the Comet assay are the most convenient in terms of costs and benefits...
July 25, 2017: Animal Genetics
https://www.readbyqxmd.com/read/28741213/geochemical-fractionation-and-pollution-assessment-of-zn-cu-and-fe-in-surface-sediments-from-shadegan-wildlife-refuge-southwest-of-iran
#5
Behnam Heidari Chaharlang, Alireza Riyahi Bakhtiari, Jahangard Mohammadi, Parvin Farshchi
This research focuses on the fractionation and distribution patterns of heavy metals (Zn, Cu, and Fe) in surficial sediments collected from Shadegan Wildlife Refuge, the biggest wetland in southern part of Iran, to provide an overall classification for the sources of metals in the study area using a sequential extraction method. For this purpose, a four-step sequential extraction technique was applied to define the partitioning of the metals into different geochemical phases of the sediment. The results illustrated that the average total level of Zn, Cu, and Fe in surface sediments were 55...
July 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28741204/remarks-on-the-current-quality-of-groundwater-in-vietnam
#6
EDITORIAL
Tran Le Luu
This paper reviews the current quality of groundwater in Vietnam. In Vietnam, groundwater is obtained primarily from tubewells, which have high concentrations of pollutants such as As, Fe, Mn, and NH4(+). In the areas where groundwater tests were conducted, arsenic levels ranged from 0.1-3050 μg/L, which substantially exceed the standard of 10 μg/L which has been established by the WHO. Contamination sources are distributed over a large area from the Red River Delta in the north to the Mekong River Delta in the south, putting as many as ten million people at risk of adverse health effects...
July 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28740638/nutritional-physiology-and-ecology-of-wildlife-in-a-changing-world
#7
Kim Birnie-Gauvin, Kathryn S Peiman, David Raubenheimer, Steven J Cooke
Over the last century, humans have modified landscapes, generated pollution and provided opportunities for exotic species to invade areas where they did not evolve. In addition, humans now interact with animals in a growing number of ways (e.g. ecotourism). As a result, the quality (i.e. nutrient composition) and quantity (i.e. food abundance) of dietary items consumed by wildlife have, in many cases, changed. We present representative examples of the extent to which vertebrate foraging behaviour, food availability (quantity and quality) and digestive physiology have been modified due to human-induced environmental changes and human activities...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28740386/quantum-dots-based-lateral-flow-immunoassay-combined-with-image-analysis-for-semiquantitative-detection-of-ige-antibody-to-mite
#8
Yan Zhao, Qiang Zhang, Qingfeng Meng, Fenglian Wu, Lihua Zhang, Yao Tang, Yuanyuan Guan, Lixin An
Semiquantitative and rapid detection of specific IgE (sIgE) with well clinical relevance to house dust mite (HDM) are promising for prevalence rhinitis and asthma patients due to the increasing air pollution. However, the conventional IgE measurement systems are time-consuming, complicated and require special instruments. Herein, we overcome the above limitations of sIgE to HDM detection system by developing a quantum dot nanobeads-based lateral flow immunoassay and an image analysis procedure. The proposed detection system could semiquantitatively measure the IgE in a linear range of 0...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28739450/controlled-release-for-crop-and-wood-protection-recent-progress-toward-sustainable-and-safe-nanostructured-biocidal-systems
#9
REVIEW
Bruno D Mattos, Blaise L Tardy, Washington L E Magalhães, Orlando J Rojas
We review biocide delivery systems (BDS), which are designed to deter or control harmful organisms that damage agricultural crops, forests and forest products. This is a timely topic, given the growing socio-economical concerns that have motivated major developments in sustainable BDS. Associated designs aim at improving or replacing traditional systems, which often consist of biocides with extreme behavior as far as their solubility in water. This includes those that compromise or pollute soil and water (highly soluble or volatile biocides) or those that present low bioavailability (poorly soluble biocides)...
July 21, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28739294/polycyclic-aromatic-hydrocarbons-and-female-reproductive-health-a-scoping-review
#10
REVIEW
Ashley L Bolden, Johanna R Rochester, Kim Schultz, Carol F Kwiatkowski
Polycyclic aromatic hydrocarbons (PAHs) are a class of common persistent environmental pollutants found in water, air, soil, and plants and can be released by natural sources. However, the majority of atmospheric PAHs are from vehicular emissions, coal-burning plants, and the production and use of petroleum-derived substances. Exposure to PAHs has been implicated in cancer and other diseases, including reproductive disorders. This scoping review is a preliminary step that explores the utility and feasibility of completing a systematic review evaluating the effect of PAHs on female reproduction...
July 21, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28739107/hydrostatic-pressure-and-the-experimental-toxicology-of-marine-fishes-the-elephant-in-the-room
#11
Benjamin Lemaire
Hydrostatic pressure (HP) increases linearly with depth in aquatic environments, so that many fish species routinely experience moderate-to-high HP levels (i.e., from a few to dozens of MPa). Biological effects of this thermodynamic variable are evidenced by a reduced functionality of many biomolecular systems, even in barotolerant and barophilic species. It is likely that environmentally-relevant HP levels (i.e., above atmospheric) could also modulate the responsiveness to and toxic effects of pollutants in fish...
July 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28739105/mountains-to-the-sea-river-study-of-plastic-and-non-plastic-microfiber-pollution-in-the-northeast-usa
#12
Rachael Z Miller, Andrew J R Watts, Brooke O Winslow, Tamara S Galloway, Abigail P W Barrows
Aquatic environments are sinks for anthropogenic contamination, whether chemical or solid pollutants. Microfibers shed from clothing and other textiles contribute to this problem. These can be plastic or non-plastic origin. Our aim was to investigate the presence and distribution of both types of anthropogenic microfibers along the length of the Hudson River, USA. Surface grab samples were collected and filtered through a 0.45μm filter paper. Abundance of fibers was determined after subtraction of potential contamination...
July 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28739103/contamination-assessment-of-mercury-lead-cadmium-and-arsenic-in-surface-sediments-of-chabahar-bay
#13
Neda Molamohyeddin, Hossein Ghafourian, Seyed Mohamadtaghi Sadatipour
This study aimed to investigate heavy metals content of mercury (Hg), lead (Pb), cadmium (Cd) and arsenic (As) in surface sediments of Chabahar Bay. Sediment samples were taken from 13 stations and then analyzed. The concentration of Hg, Pb, Cd and As ranged between 0.06 and 0.14ppm, 8 and 23ppm, 0.05 and 0.9ppm and 5 and 22ppm, respectively. Arsenic content was more than ERL at some stations. Statistical analyses indicated critical importance of organic matter and mud in metal dispersion. Also, positive correlation of Al with Pb, Hg and Cd probably implies their terrestrial origination...
July 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28739102/microplastics-in-coastal-environments-of-the-arabian-gulf
#14
Oyebamiji Abib Abayomi, Pedro Range, Mohammad A Al-Ghouti, Jeffrey Philip Obbard, Saeed Hashim Almeer, Radhouane Ben-Hamadou
Eight sandy beaches along the coastline of Qatar and four sea surface stations on the eastern coast, adjacent to Doha Bay, were surveyed between December 2014 and March 2015. Microplastics, mainly low density polyethylene and polypropylene, were found in all samples of sediments and seawater. Blue fibers, ranging between 1 and 5mm, were the dominant type of particle present. Abundances on the sea surface varied between 4.38×10(4) and 1.46×10(6)particles·km(-2), with the highest values being consistently found 10km offshore, suggesting the presence of a convergence zone...
July 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28738631/a-review-aptamer-based-analytical-strategies-using-the-nanomaterials-for-environmental-and-human-monitoring-of-toxic-heavy-metals
#15
REVIEW
Leila Farzin, Mojtaba Shamsipur, Shahab Sheibani
Recent developments in biotechnology offer the new methods for the sensitive detection of heavy metals based on the affinity and specificity of aptamers, as nucleic acid ligands selected from random sequence pools in vitro. Heavy metals have received considerable importance as the most toxic metallic pollutants which may cause serious environmental damages. They are classified as trace elements because of their presence in trace concentrations in various environmental matrices. Thus, the precise and sensitive methods to detect heavy metals are important to ensure human and environment safety...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738597/sensitive-detection-of-sulfide-based-on-the-self-assembly-of-fluorescent-silver-nanoclusters-on-the-surface-of-silica-nanospheres
#16
Yehan Yan, Kui Zhang, Huan Yu, Houjuan Zhu, Mingtai Sun, Tasawar Hayat, Ahmed Alsaedi, Suhua Wang
Hydrogen sulfide is a toxic and flammable gaseous pollutant often emitted to air as a by-product of water supply, chemical, petroleum and coal industries. It can be transferred into sulfur dioxide in the air under some meteorologic conditions. Herein, we report a novel ratiometric fluorescence method for hydrogen sulfide based on silver nanoclusters and quantum dots. The silver nanoclusters have been self-assemblied onto the surface of silica spheres, which are embedded with red fluorescent quantum dots, to form a dual-emissive nanohybrid...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738577/high-bright-fluorescent-carbon-dot-as-versatile-sensing-platform
#17
Mumei Han, Liping Wang, Siheng Li, Liang Bai, Yunjie Zhou, Yue Sun, Hui Huang, Hao Li, Yang Liu, Zhenhui Kang
The surface functionalization will introduce additional functional groups on carbon dots (CDs) surface and then enrich the properties of CDs. Here, we show the various surface functionalized CDs (-COOH, -OH, -SH, -NH2, etc, named as NS-CDs) were synthesized with fascinating features, including high quantum efficiency (38.9%), long-term stability and good biocompatibility. Notably, it can serve as multifunction fluorescent probe in sensing system, including label-free detections in hydrogen peroxide (H2O2) with a wide linear range (1...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738513/mitigation-of-nonpoint-source-pollution-in-rural-areas-from-control-to-synergies-of-multi-ecosystem-services
#18
Yonghong Wu, Junzhuo Liu, Renfang Shen, Bojie Fu
Nonpoint source (NPS) pollution produced by human activities in rural areas has induced excessive nutrient input into surface waters and the decline of water quality. The essence of NPS pollution is the transport of nutrients between soil and water. Traditional NPS pollution control strategies, however, are mainly based on the solid and liquid phases, with little focus on the bio-phase between water and soil. The pollutants produced from NPS can be regarded as a resource if recycled or reused in an appropriate way in the agricultural ecosystem...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738509/ambient-sediment-quality-conditions-in-minnesota-lakes-usa-effects-of-watershed-parameters-and-aquatic-health-implications
#19
Judy L Crane
Surficial sediments were collected from 50 randomly selected Minnesota lakes, plus four a priori reference lakes, in 2007. The lakes encompassed broad geographic coverage of the state and included a variety of major land uses in the surrounding watersheds. Sediment samples were analyzed for a suite of metals, metalloids, persistent organic pollutants, total organic carbon, and particle size fractions. In addition, a small fish survey was conducted to assess PBDEs in both whole fish and fish tissues. Sediment quality in this set of lakes ranged from good (43%) to moderate (57%) based on an integrative measure of multiple contaminants...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738507/gender-specific-associations-between-serum-isomers-of-perfluoroalkyl-substances-and-blood-pressure-among-chinese-isomers-of-c8-health-project-in-china
#20
Wen-Wen Bao, Zhengmin Min Qian, Sarah Dee Geiger, Echu Liu, Yimin Liu, Si-Quan Wang, Wayne R Lawrence, Bo-Yi Yang, Li-Wen Hu, Xiao-Wen Zeng, Guang-Hui Dong
Previous studies have demonstrated associations of perfluoroalkyl substances (PFASs), a group of highly persistent chemicals ubiquitous in wildlife and humans, with hypertension, but the relationships are mixed. Furthermore, academic literature on the relationship between isomers of PFASs and blood pressure (BP) and hypertension in populations from a higher pollution area is scant. We studied 1612 Chinese adults, ages 22-96years old, from Shenyang, China, utilizing high performance liquid chromatography-mass spectrometry to analyze isomers of perfluorooctanesulfonate (PFOS), perfluorooctanoate (PFOA), and other PFASs in blood serum...
July 18, 2017: Science of the Total Environment
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