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https://www.readbyqxmd.com/read/28330301/evaluation-of-p-cresol-degradation-with-polyphenol-oxidase-ppo-immobilized-in-various-matrices
#1
Vijayalakshmi A Edalli, Sikandar I Mulla, Syed Ali Musstjab Akber Shah Eqani, Gurumurthy D Mahadevan, Rohit Sharma, Yogesh Shouche, Chandrappa M Kamanavalli
p-Cresol is an environmental pollutant due to its vast use, toxicity and persistence, nevertheless, its degradation in an enzyme is unclear. In this study, we used Pleurotus sp. isolate VLECK02 polyphenol oxidase (PPO) for the determination of p-cresol degradation. On the basis of UV, FT-IR and chromatographic (HPLC and GC-MS) analysis, 4-methylcatechol was identified as the main metabolite of p-cresol catabolism. In addition, batch and semi-continuous degradation of p-cresol (10 and 20 mM) were studied and compared by free and immobilized PPO in different matrices like sodium alginate (SA), sodium alginate-polyvinyl alcohol (SA-PVA) and sodium alginate-polyvinyl alcohol-silver nanoparticles (SA-PVA-AgNPs)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330298/biodegradation-of-used-engine-oil-by-novel-strains-of-ochrobactrum-anthropi-hm-1-and-citrobacter-freundii-hm-2-isolated-from-oil-contaminated-soil
#2
Haytham M M Ibrahim
Used engine oil (UEO) constitutes a serious environmental problem due to the difficulty of disposal off or reuse. Ten bacterial strains with biodegradation potential were isolated from UEO-contaminated soil sample using enrichment technique. Two strains which exhibited the highest degradation %, 51 ± 1.2 and 48 ± 1.5, respectively, were selected. Based on the morphological, biochemical characteristics and 16S rRNA sequence analysis, they were identified as Ochrobactrum anthropi HM-1 (accession no: KR360745) and Citrobacter freundii HM-2 (accession no: KR360746)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330267/treatment-of-landfill-leachate-using-asbr-combined-with-zeolite-adsorption-technology
#3
Chi Kim Lim, Ta Wee Seow, Chin Hong Neoh, Muhamad Hanif Md Nor, Zaharah Ibrahim, Ismail Ware, Siti Hajar Mat Sarip
Sanitary landfilling is the most common way to dispose solid urban waste; however, improper landfill management may pose serious environmental threats through discharge of high strength polluted wastewater also known as leachate. The treatment of landfill leachate to fully reduce the negative impact on the environment, is nowadays a challenge. In this study, an aerobic sequencing batch reactor (ASBR) was proposed for the treatment of locally obtained real landfill leachate with initial ammoniacal nitrogen and chemical oxygen demand (COD) concentration of 1800 and 3200 mg/L, respectively...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330244/elucidation-of-impact-of-heavy-metal-pollution-on-soil-bacterial-growth-and-extracellular-polymeric-substances-flexibility
#4
Muniswamy David, Paidi Murali Krishna, Jeybalan Sangeetha
Metal bioaccessibility is an alarming issue in croplands of mining sites due to overloading of toxic metals. Hence, the present study is aimed to determine the overloading of toxic metal in croplands across the Tawag village, Hutti, Raichur, India. Correspondingly, to identify the soil bacterial growth, physiological oxidative stress enzyme activity and surface macromolecular functional group evolution were analysed in and around the toxic metal contaminated sites through FT-IR and FT-Raman spectrometry. The evaluated results attribute that the study area is heavily polluted with the toxic metals such as arsenic, cadmium, chromium, lead and zinc...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330194/exploited-application-of-sulfate-reducing-bacteria-for-concomitant-treatment-of-metallic-and-non-metallic-wastes-a-mini-review
#5
REVIEW
Ali Hussain, Ali Hasan, Arshad Javid, Javed Iqbal Qazi
A variety of multidimensional anthropogenic activities, especially of industrial level, are contaminating our aquatic and terrestrial environments with a variety of metallic and non-metallic pollutants. The metallic and non-metallic pollutants addressed specifically in this review are heavy metals and various compound forms of sulfates, respectively. Direct and indirect deleterious effects of the both types of pollutants to all forms of life are well-known. The treatment of such pollutants is therefore much necessary before their final discharge into the environment...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330102/biodegradation-of-flubendiamide-by-a-newly-isolated-chryseobacterium-sp-strain-ssj1
#6
Shrinivas S Jadhav, M David
Flubendiamide, as a new class (Phthalic acid diamide) of pesticide with a wide spectrum of activity against lepidopteran pests extensively used alone or in combination with other insecticides in agriculture system to get protection from insect pests. Due to high specificity and limited approach towards non-target organism, the extensive use of this pesticide as an alternate for organophosphate and organochlorine pesticides, causing an eventual increase in environmental pollution. Five flubendiamide-resistant bacterial strains were isolated during the present study from agriculture soil considering previous history of pesticide application...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330085/bioprospecting-and-biotechnological-applications-of-fungal-laccase
#7
REVIEW
Pooja Upadhyay, Rahul Shrivastava, Pavan Kumar Agrawal
Laccase belongs to a small group of enzymes called the blue multicopper oxidases, having the potential ability of oxidation. It belongs to enzymes, which have innate properties of reactive radical production, but its utilization in many fields has been ignored because of its unavailability in the commercial field. There are diverse sources of laccase producing organisms like bacteria, fungi and plants. In fungi, laccase is present in Ascomycetes, Deuteromycetes, Basidiomycetes and is particularly abundant in many white-rot fungi that degrade lignin...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329926/-acute-effect-of-fine-particulate-matters-on-daily-cardiovascular-disease-mortality-in-seven-cities-of-china
#8
R M Liang, P Yin, L J Wang, Y C Li, J M Liu, Y N Liu, J L You, J L Qi, M G Zhou
Objective: To explore the effect of fine particulate matters with an aerodynamic diameter less than 2.5 μm (PM(2.5)) on daily cardiovascular disease mortality in seven cities of China. Methods: Daily average concentrations of PM(2.5), cardiovascular disease mortality data and environmental data were collected from January 1, 2013 to December 31, 2015 in seven cities of China, including Shijiazhuang, Haerbin, Shanghai, Wuhan, Guangzhou, Chengdu and Xi' an. We linked generalized additive model with Quasi-Poisson distribution to evaluate the association between daily concentrations of PM(2...
March 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28329925/-attaching-importance-to-study-on-acute-health-risk-assessment-and-adaptation-of-air-pollution-and-climate-change
#9
X M Shi
Air pollution and climate change have become key environmental and public health problems around the world, which poses serious threat to human health. How to assess and mitigate the health risks and increase the adaptation of the public have become an urgent topic of research in this area. The six papers in this issue will provide important and rich information on design, analysis method, indicator selection and setting about acute health risk assessment and adaptation study of air pollution and climate change in China, reflecting the advanced conceptions of multi-center and area-specific study and multi-pollutant causing acute effect study...
March 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28328986/estimation-of-genetic-parameters-and-genotype-by-environment-interactions-related-to-acute-ammonia-stress-in-pacific-white-shrimp-litopenaeus-vannamei-juveniles-at-two-different-salinity-levels
#10
Xia Lu, Sheng Luan, Baoxiang Cao, Xianhong Meng, Juan Sui, Ping Dai, Kun Luo, Xiaoli Shi, Dengchun Hao, Guomin Han, Jie Kong
Regarding the practical farming of Litopenaeus vannamei, the deterioration of water quality from intensive culture systems and environmental pollution is a common but troublesome problem in the cultivation of this species. The toxicities that result from deteriorating water quality, such as that from ammonia stress, have lethal effects on juvenile shrimp and can increase their susceptibility to pathogens. The toxicity of ammonia plays an important role in the frequently high mortality during the early stage on shrimp farms...
2017: PloS One
https://www.readbyqxmd.com/read/28326768/air-pollution-and-climate-change-effects-on-allergies-in-the-anthropocene-abundance-interaction-and-modification-of-allergens-and-adjuvants
#11
Kathrin Reinmuth-Selzle, Christopher J Kampf, Kurt Lucas, Naama Lang-Yona, Janine Fröhlich-Nowoisky, Manabu Shiraiwa, Pascale Sylvie Jeanne Lakey, Senchao Lai, Fobang Liu, Anna Theresa Kunert, Kira Ziegler, Fangxia Shen, Rossella Sgarbanti, Bettina Weber, Iris Bellinghausen, Joachim Saloga, Michael G Weller, Albert Duschl, Detlef Schuppan, Ulrich Pöschl
Air pollution and climate change are potential drivers for the increasing burden of allergic diseases. The molecular mechanisms by which air pollutants and climate parameters may influence allergic diseases, however, are complex and elusive. This article provides an overview of physical, chemical and biological interactions between air pollution, climate change, allergens, adjuvants and the immune system, addressing how these interactions may promote the development of allergies. We reviewed and synthesized key findings from atmospheric, climate, and biomedical research...
March 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28325924/genome-wide-association-analysis-identifies-loci-governing-mercury-accumulation-in-maize
#12
Zhan Zhao, Zhongjun Fu, Yanan Lin, Hao Chen, Kun Liu, Xiaolong Xing, Zonghua Liu, Weihua Li, Jihua Tang
Owing to the rapid development of urbanisation and industrialisation, heavy metal pollution has become a widespread environmental problem. Maize planted on mercury (Hg)-polluted soil can absorb and accumulate Hg in its edible parts, posing a potential threat to human health. To understand the genetic mechanism of Hg accumulation in maize, we performed a genome-wide association study using a mixed linear model on an association population consisting of 230 maize inbred lines with abundant genetic variation. The order of relative Hg concentrations in different maize tissues was as follows: leaves > bracts > stems > axes > kernels...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28324851/assessing-the-impacts-of-best-management-practices-on-nitrate-pollution-in-an-agricultural-dominated-lowland-catchment-considering-environmental-protection-versus-economic-development
#13
Marcelo B Haas, Björn Guse, Nicola Fohrer
Water quality is strongly affected by nitrate inputs in agricultural catchments. Best Management Practices (BMPs) are alternative practices aiming to mitigate the impacts derived from agricultural activities and to improve water quality. Management activities are influenced by different governmental policies like the Water Framework Directive (WFD) and the Renewable Energy Sources Act (EEG). Their distinct goals can be contrasting and hamper an integrated sustainable development. Both need to be addressed in the actual conjuncture in rural areas...
March 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28324843/variations-in-pu-isotopic-composition-in-soils-from-the-spitsbergen-norway-three-potential-pollution-sources-of-the-arctic-region
#14
E Łokas, R Anczkiewicz, R Kierepko, J W Mietelski
Although the polar regions have not been industrialised, numerous contaminants originating from human activity are detectable in the Arctic environment. This study reports evidence of (240)Pu/(239)Pu atomic ratios in the tundra and initial soils from different parts of west and central Spitsbergen and recognizes possible environmental inputs of non-global fallout Pu. The average atomic ratio of (240)Pu/(239)Pu equal to 0.179 (ranging between 0.129 and 0.201) in tundra soils are comparable to the characteristic ratio for global fallout (0...
March 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28324255/can-red-deer-antlers-be-used-as-an-indicator-of-environmental-and-edible-tissues-trace-element-contamination
#15
Aleksandra Giżejewska, Józef Szkoda, Agnieszka Nawrocka, Jan Żmudzki, Zygmunt Giżejewski
Venison is an attractive product for consumers concerned with healthy lifestyle; however, it can contain high levels of toxic elements, and therefore, it is a possible source of hazardous contaminants in human diet. Antlers are suitable bioindicators of environmental metal contamination, and herein, we assessed the ability of trace element levels in antlers to indicate levels in edible soft tissues. We determined the concentrations of lead (Pb), cadmium (Cd), mercury (Hg), arsenic (As), copper (Cu), zinc (Zn), and iron (Fe) in the liver, kidney, muscle, and antlers of 14 free-ranging red deer (Cervus elaphus) from northeastern Poland using atomic absorption spectrometry...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28323864/population-genetic-structure-of-eelgrass-zostera-marina-on-the-korean-coast-current-status-and-conservation-implications-for-future-management
#16
Jae Hwan Kim, Ji Hyoun Kang, Ji Eun Jang, Sun Kyeong Choi, Min Ji Kim, Sang Rul Park, Hyuk Je Lee
Seagrasses provide numerous ecosystem services for coastal and estuarine environments, such as nursery functions, erosion protection, pollution filtration, and carbon sequestration. Zostera marina (common name "eelgrass") is one of the seagrass bed-forming species distributed widely in the northern hemisphere, including the Korean Peninsula. Recently, however, there has been a drastic decline in the population size of Z. marina worldwide, including Korea. We examined the current population genetic status of this species on the southern coast of Korea by estimating the levels of genetic diversity and genetic structure of 10 geographic populations using eight nuclear microsatellite markers...
2017: PloS One
https://www.readbyqxmd.com/read/28323471/estimating-the-proportion-of-childhood-cancer-cases-and-costs-attributable-to-the-environment-in-california
#17
Lauren Nelson, Jhaqueline Valle, Galatea King, Paul K Mills, Maxwell J Richardson, Eric M Roberts, Daniel Smith, Paul English
OBJECTIVES: To estimate the proportion of cases and costs of the most common cancers among children aged 0 to 14 years (leukemia, lymphoma, and brain or central nervous system tumors) that were attributable to preventable environmental pollution in California in 2013. METHODS: We conducted a literature review to identify preventable environmental hazards associated with childhood cancer. We combined risk estimates with California-specific exposure prevalence estimates to calculate hazard-specific environmental attributable fractions (EAFs)...
March 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28321699/magnetic-edta-functionalized-cofe2o4-nanoparticles-edta-cofe2o4-as-a-novel-catalyst-for-peroxymonosulfate-activation-and-degradation-of-orange-g
#18
Lin Deng, Zhou Shi, Zhiyan Zou, Shiqing Zhou
EDTA functionalized CoFe2O4 nanoparticles (EDTA-CoFe2O4) synthesized using a facile one-pot solvothermal method were employed as catalysts to activate peroxymonosulfate (PMS) with Orange G (OG) as the target pollutant. Effects of operating parameters including initial solution pH, catalyst dosage, PMS dosage, and water matrix components such as Cl(-), NO3(-), CO3(2-), and humic acid were evaluated. A degradation efficiency of 93% was achieved in 15 min with 1 mM PMS and 0.2 g/L EDTA-CoFe2O4 catalyst, while only 57% of OG was degraded within 15 min in CoFe2O4/PMS system...
March 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28321680/environmental-effects-of-crude-oil-spill-on-the-physicochemical-and-hydrobiological-characteristics-of-the-nun-river-niger-delta
#19
Augustine O Ifelebuegu, Justina E Ukpebor, Anita U Ahukannah, Ernest O Nnadi, Stephen C Theophilus
Oil spill pollution has remained a source of several international litigations in the Niger Delta region of Nigeria. In this paper, we examined the impacts of small recurrent crude oil spills on the physicochemical, microbial and hydrobiological properties of the Nun River, a primary source of drinking water, food and recreational activities for communities in the region. Samples were collected from six sampling points along the stretch of the lower Nun River over a 3-week period. Temperature, pH salinity, turbidity, total suspended solids, total dissolved solids, dissolved oxygen, phosphate, nitrate, heavy metals, BTEX, PAHs and microbial and plankton contents were assessed to ascertain the quality and level of deterioration of the river...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28320621/global-reverse-supply-chain-design-for-solid-waste-recycling-under-uncertainties-and-carbon-emission-constraint
#20
Zhitao Xu, Adel Elomri, Shaligram Pokharel, Qin Zhang, X G Ming, Wenjie Liu
The emergence of concerns over environmental protection, resource conservation as well as the development of logistics operations and manufacturing technology has led several countries to implement formal collection and recycling systems of solid waste. Such recycling system has the benefits of reducing environmental pollution, boosting the economy by creating new jobs, and generating income from trading the recyclable materials. This leads to the formation of a global reverse supply chain (GRSC) of solid waste...
March 17, 2017: Waste Management
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