journal
MENU ▼
Read by QxMD icon Read
search

Environmental Science and Pollution Research International

journal
https://www.readbyqxmd.com/read/30244447/evaluation-of-aromatic-hydrocarbon-decomposition-catalyzed-by-the-dioxygenase-system-and-substitution-of-ferredoxin-and-ferredoxin-reductase
#1
Jun Won Yang, Wooyoun Cho, Yejee Lim, Sungyoon Park, Dayoung Lee, Hyun-A Jang, Han S Kim
In this study, the catalytic activity and kinetic characteristics of the aromatic hydrocarbon dioxygenase system and the possibility of substituting its ferredoxin and ferredoxin reductase components were evaluated. The genes encoding toluene dioxygenase and toluene dihydrodiol dehydrogenase were cloned from Pseudomonas putida F1, and the corresponding enzymes were overexpressed and purified to homogeneity. Oxidative hydroxylation of toluene to cis-toluene dihydrodiol was catalyzed by toluene dioxygenase, and its subsequent dehydrogenation to 3-methylcatechol was catalyzed by toluene dihydrodiol dehydrogenase...
September 23, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244446/independent-and-interactive-effects-of-reduced-seawater-ph-and-oil-contamination-on-subsurface-sediment-bacterial-communities
#2
António Louvado, Francisco J R C Coelho, Hélder Gomes, Daniel F R Cleary, Ângela Cunha, Newton C M Gomes
Ocean acidification may exacerbate the environmental impact of oil hydrocarbon pollution by disrupting the core composition of the superficial (0-1 cm) benthic bacterial communities. However, at the subsurface sediments (approximately 5 cm below sea floor), the local biochemical characteristics and the superjacent sediment barrier may buffer these environmental changes. In this study, we used a microcosm experimental approach to access the independent and interactive effects of reduced seawater pH and oil contamination on the composition of subsurface benthic bacterial communities, at two time points, by 16S rRNA gene-based high-throughput sequencing...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244445/antioxidative-response-in-leaves-and-allelochemical-changes-in-root-exudates-of-ricinus-communis-under-cu-zn-and-cd-stress
#3
Shuifeng Wang, Ye Zhao, Jinghua Guo, Yuan Liu
We have previously reported that Ricinus communis is a good candidate for the phytoremediation of Cd- and Zn-contaminated soil and for fuel production. In this study, changes in the activity of antioxidant enzymes (superoxide dismutase, SOD; catalase, CAT; and guaiacol peroxidase, POD) and the contents of chlorophyll and malondialdehyde (MDA) in R. communis leaves under Cu, Zn, and Cd stress were examined. Compounds from the exudate of R. communis roots were collected and analyzed using GC-MS chromatograms...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244444/effects-of-high-ammonium-enrichment-in-water-column-on-the-clonal-growth-of-submerged-macrophyte-vallisneria-natans
#4
Qingyang Rao, Xuwei Deng, Haojie Su, Wulai Xia, Yao Wu, Xiaolin Zhang, Ping Xie
As we know, the survival of young ramets and stolons is essential for the clonal growth of many aquatic plants. However, few NH4 + enrichment experiments on clonal growth of submerged macrophytes have been conducted to provide possible evidences for their declines in eutrophic lakes. Here, the growth and physiological responses of V. natans to the enrichment of NH4 + -N were examined under six inorganic nitrogen (IN, i.e., the sum of nitrate nitrogen (NO3 - -N) and ammonium nitrogen (NH4 + -N)) concentrations (control, 2...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244443/characterization-and-application-of-microalgae-hydrochar-as-a-low-cost-adsorbent-for-cu-ii-ion-removal-from-aqueous-solutions
#5
Mohammad Saber, Fumitake Takahashi, Kunio Yoshikawa
Hydrochar prepared from the hydrothermal liquefaction of microalgae is characterized and investigated for copper removal from aqueous solution. Two hydrochars were prepared at 210 °C (HD210) and 250 °C (HD250). The effect of the initial solution pH, the initial Cu(II) concentration, the contact time, and the temperature will be investigated. According to the elemental analysis, the volatile matter in the hydrochars was lower and ash content was higher than those of microalgae. Also, pore characteristic analysis revealed that the surface area of the HD250 was higher than that of the HD210 suggesting a higher potential for the adsorption process...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244442/air-quality-improvement-and-health-benefit-of-pm-2-5-reduction-from-the-coal-cap-policy-in-the-beijing-tianjin-hebei-bth-region-china
#6
Xiurui Guo, Lijuan Zhao, Dongsheng Chen, Yuhuan Jia, Na Zhao, Wenwen Liu, Shuiyuan Cheng
Large amounts of air pollutants emitted from massive coal combustion result in the air quality deterioration and threaten public health in China. To improve air quality, the Chinese government released the coal cap policy to reduce coal consumption. So it is important and necessary to understand the possible environmental impact and relevant health benefits from the coal cap policy. The purpose of this paper is to quantify the air quality improvement and to evaluate the health benefits from the implementation of the coal cap policy, with the Beijing-Tianjin-Hebei (BTH) region as the study area...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244441/distribution-of-virulence-factors-determinants-of-antibiotic-resistance-and-molecular-fingerprinting-of-salmonella-species-isolated-from-cattle-and-beef-samples-suggestive-evidence-of-animal-to-meat-contamination
#7
Beauty Sicelo Dlamini, Peter Kotsoana Montso, Ajay Kumar, Collins Njie Ateba
In this study, three hundred presumptive Salmonella strains isolated from cattle faeces and raw beef samples were subjected to both preliminary and confirmatory tests specific for Salmonella. PCR assays revealed that 100%, 20% and 26.7% of the isolates were positive for 16S rRNA, fliC and fljB gene fragments, respectively. Large proportions (62.4 to 94.3%) of these isolates were multiple antibiotic resistant (MAR) strains that were resistant to three or more antibiotics belonging to different classes. MAR phenotypes Ab1, Ab2, Ab3, Ab7, Ab8, Ab9, Ab26 and Ab27 were dominant among the isolates...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244440/cleaner-emissions-from-a-di-diesel-engine-fueled-with-mahua-oil-and-low-carbon-ethanol-hydrogen-in-dual-fuel-mode
#8
Arul Kothandan, Senthilkumar Masimalai
This work is all about utilization of more than two low carbon fuels in a diesel engine with a main objective of reducing harmful emissions. Initially, test engine was tested with a non-petroleum-based fuel namely mahua oil, under different load conditions. In the second phase of the work, test engine was modified into dual fuel mode with slight modification in the intake manifold for the admission of a low carbon high octane primary fuel namely ethanol. The engine was tested by varying the ethanol energy share (EES) from 5% to the point at which engine tends to knock at 100% and 40% of the maximum engine power output...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30244439/enzyme-activity-modification-in-adult-beetles-agelastica-coerulea-inhabiting-birch-trees-in-an-ozone-enriched-atmosphere
#9
Shahenda A Abu ElEla, Evgenios Agathokleous, Nirvina A Ghazawy, Tarek R Amin, Wael M ElSayed, Takayoshi Koike
Tropospheric ozone (O3 ) is a naturally occurring gas in the atmosphere. However, the concentration of O3 increased in the twentieth century. Although the effects of O3 on vegetation have been extensively studied since the 1950s, limited information exists regarding the effects of O3 on insect herbivores. In particular, evidence is lacking regarding the effects of O3 on the biology of insect herbivores. Agelastica coerulea Baly (1874) is a coleopteran species that grazes on Betulaceae plants. In this study, to investigate the effects of O3 on A...
September 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242659/comparative-transcriptome-analysis-of-zea-mays-in-response-to-petroleum-hydrocarbon-stress
#10
Birsen Cevher-Keskin, Çiğdem Selçukcan-Erol, Bayram Yüksel, Özlem Ertekin, Yasemin Yıldızhan, Selma Onarıcı, Oktay Kulen, Abdul Razaque Memon
The use of plants for the improvement of soils contaminated with hydrocarbons has been a primary research focus in phytoremediation studies. Obtaining insights regarding genes that are differentially induced by petroleum hydrocarbon stress and understanding plant response mechanisms against petroleum hydrocarbons at molecular level is essential for developing better phytoremediation strategies to remove these hazardous contaminants. The purpose of this study was to analyze the transcriptomal profile changes under hydrocarbon stress in maize plants and identify the genes associated with the phytoremediative capacity...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242658/benchmarking-toronto-wastewater-treatment-plants-using-dea-window-and-tobit-regression-analysis-with-a-dynamic-efficiency-perspective
#11
Sufeng Wang, Shuang Qiu, Shijian Ge, Jia Liu, Zhanglin Peng
The environmental-economic focus of wastewater treatment and management attracts growing attentions in recent years. The static efficiencies and their dynamic changes are helpful to systematically assess the environmental performance of the water agencies and wastewater treatment plants (WWTPs). Additionally, identifying key factors of efficiencies is critical to improve the operation of WWTPs. In this study, the window method of data envelopment analysis (DEA) was applied to estimate the annual efficiency for four Canadian WWTPs and to explore the variations of annual efficiency under different window lengths...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242657/accumulation-of-heavy-metals-in-muscle-liver-and-gonads-of-little-tunny-euthynnus-alletteratus-from-the-western-region-of-algeria
#12
Mohammed Amine Ansel, Nardjess Benamar
Cadmium, lead, zinc, and copper levels were measured in muscle, liver, and gonads of little tunny (Euthynnus alletteratus) from the western region of Algeria. Relationships between heavy metals concentrations and age, sex, sexual maturity stages, and fish size were investigated. The highest average levels of cadmium (0.2010 ± 0.026 mg kg-1 ), lead (0.8069 ± 0.09 mg kg-1 ), and copper (18.1135 ± 1.34 mg kg-1 ) were recorded in the liver, while the highest mean zinc value of 203.1454 ± 21...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242656/using-dual-isotopes-and-a-bayesian-isotope-mixing-model-to-evaluate-sources-of-nitrate-of-tai-lake-china
#13
Shasha Liu, Fengchang Wu, Weiying Feng, Wenjing Guo, Fanhao Song, Hao Wang, Ying Wang, Zhongqi He, John P Giesy, Peng Zhu, Zhi Tang
Identification and quantification of sources of nitrate (NO3 - ) in freshwater lakes provide useful information for management of eutrophication and improving water quality in lakes. Dual δ15 N- and δ18 O-NO3 - isotopes and a Bayesian isotope mixing model were applied to identify sources of NO3 - and estimate their proportional contributions to concentrations of NO3 - in Tai Lake, China. In waters of Tai Lake, values for δ15 N-NO3 - ranged from 3.8 to 10.1‰, while values of δ18 O ranged from 2.2 to 12...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242655/competitive-sequestration-of-ni-ii-and-eu-iii-on-montmorillonite-role-of-molar-ni-eu-ratios-and-coexisting-oxalate
#14
Lin Xu, Wei Liu, Yawen Cai, Chunfang Wu, Lei Chen, Shitong Yang, Xiangke Wang, Guoxun Ji, Shuao Wang
The competitive binding trends of Ni(II) and Eu(III) on montmorillonite in the absence/presence of Na-oxalate are explored by using batch sorption/desorption technique, speciation modeling, and X-ray diffraction (XRD) analysis. With a series of molar Ni:Eu ratios (i.e., 1:1, 5:1, 10:1, 1:5, and 1:10), the coexisting Ni(II) did not affect the sequestration behaviors and immobilization mechanisms of Eu(III). In contrast, the presence of Eu(III) obviously suppressed the sorption percentages of Ni(II) in the acidic pH range...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242654/determination-of-the-phytoremediation-efficiency-of-ricinus-communis-l-and-methane-uptake-from-cadmium-and-nickel-contaminated-soil-using-spent-mushroom-substrate
#15
Yiqi Sun, Chengfeng Wen, Xia Liang, Chiquan He
Spent mushroom substrate (SMS) as an organic amendment to plant production has received increasing attention on soil phytoremediation. However, organic amendments are known to contribute to greenhouse gas (GHG) emission from soils. Castor oil plant has a high biomass production and phytoremediation potential for heavy metal-contaminated soils. In the present study, the roles of SMS on phytoremediation efficiency of castor oil plant (Ricinus communis L.) from cadmium (Cd) and nickel (Ni)-contaminated soils were investigated, and the impact of SMS application on methane emission from the contaminated soil were evaluated...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242653/decomposition-of-antibiotic-ornidazole-by-gamma-irradiation-in-aqueous-solution-kinetics-and-its-removal-mechanism
#16
Rahil Changotra, Jhimli Paul Guin, Amit Dhir, Lalit Varshney
An efficient gamma radiolytic decomposition of one of the extensively used pharmaceutical ornidazole (ORZ) was explored under different experimental conditions by varying initial concentrations, solution pHs, and doses and concentrations of inorganic ([Formula: see text]) and organic (t-BuOH) additives. The results showed that low ORZ concentrations could be efficiently decomposed using gamma irradiation. The decomposition was followed by pseudo first-order reaction kinetics with rate constant values of 2.34, 1...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242652/toxicological-assessment-of-lambda-cyhalothrin-and-acetamiprid-insecticides-formulated-mixture-on-hatchability-rate-histological-aspects-and-protein-electrophoretic-pattern-of-biomphalaria-alexandrina-ehrenberg-1831-snails
#17
Amina Mohamed Ibrahim, Sara S M Sayed, Ibrahim R A Shalash
Several formulated mixtures of pesticides are widely used in modern agriculture. Nevertheless, the agriculture runoff causes a serious damage to the aquatic ecosystem. Therefore, the present study aims to use B. alexandrina snails as bioindicators for 30 g/l lambda-cyhalothrin and 17 g/l acetamiprid as a formulated mixture insecticide. Results showed that it has a molluscicidal activity against snails at LC50 7.9 mg/l. The hatchability percent of both treated 1-day-aged and/or 3-day-aged groups were less than that of the control group...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242651/mice-exposure-to-haloxyfop-p-methyl-ester-at-predicted-environmentally-relevant-concentrations-leads-to-anti-predatory-response-deficit
#18
Bruna de Oliveira Mendes, Carlos Mesak, José Eduardo Dias Calixto, Guilherme Malafaia
Although the efficiency of haloxyfop-p-methyl ester (HPME) as selective herbicide is acknowledged, its impact on non-target organisms is poorly known. It is not known whether the short exposure of mammals to low HPME concentrations (consistent with a realistic contamination scenario) poses risks to these animals. Thus, the aim of the current study is to evaluate the effects of HPME on the anti-predatory behavior of female Swiss mice exposed to it. The animals were divided in groups: non-exposed (control) and exposed (route: i...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242650/co-administration-of-glutathione-alleviates-the-toxic-effects-of-2-3-7-8-tcdf-on-the-dna-integrity-of-sperm-and-in-the-testes-of-mice
#19
Doha Yahia, Yasmin O El-Amir, Doaa S Abd El-Maguid, Eman E Elsharkawy
This study aimed to investigate the toxic impact prompted in the testes of adult mice exposed to 2,3,7,8-tetrachlorodibenzofuran (TCDF). Four groups of 12 mice each were used in the present study. Group 1 mice were kept as control and administered corn oil only. Group 2 animals were given glutathione (GSH) in a dose of 100 mg/kg body weight by oral gavage twice a week. Group 3 was given TCDF orally twice per week, in a dose of 0.5 μg/kg body weight for 8 weeks. Group 4 was administered GSH orally in a dosage of 100 mg/kg body weight plus TCDF twice a week for 8 weeks...
September 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30242649/immobilization-of-heavy-metals-in-two-contaminated-soils-using-a-modified-magnesium-silicate-stabilizer
#20
Xingzhong Yuan, Ting Xiong, Hou Wang, Zhibin Wu, Longbo Jiang, Guangming Zeng, Yue Li
Heavy metal contamination is a severe environmental issue over the world. A lot of work has been done to develop effective stabilizers. In the present work, hydrothermal carbon-modified magnesium silicate (MS-C) was synthesized and used for the remediation of two heavy metal-polluted soils with different physicochemical properties. Soil samples were exposed to different doses of MS-C over 60 days (1, 3, and 5 wt%). The toxicity characteristic leaching procedure (TCLP) and the community bureau of reference sequential extraction procedure (BCR) were used to evaluate the remediation efficiency...
September 21, 2018: Environmental Science and Pollution Research International
journal
journal
32122
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"