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https://www.readbyqxmd.com/read/28340387/an-exploration-of-the-effect-and-interaction-mechanism-of-bisphenol-a-on-waste-sludge-hydrolysis-with-multi-spectra-isothermal-titration-microcalorimetry-and-molecule-docking
#1
Guangying Hou, Rui Zhang, Xiaoyan Hao, Chunguang Liu
An increasing amount of bisphenol A (BPA) is being produced and used, then discharged into sewage treatment plants and accumulated in sludge or soil, when the sludge is used as fertilizer. Accumulation of BPA in sludge or soil causes poisoning to the enzyme, which affects the biological treatment of sludge and the circulation and conversion of materials in soil. In this research, effect of BPA on sludge hydrolysis is studied from the respect of concentration and components of soluble organic matter in sludge, using three-dimensional fluorescence spectra...
March 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28339042/immunomodulatory-effects-in-workers-exposed-to-naturally-occurring-asbestos-fibers
#2
Caterina Ledda, Chiara Costa, Serena Matera, Beatrice Puglisi, Valentina Costanzo, Massimo Bracci, Concettina Fenga, Venerando Rapisarda, Carla Loreto
Natural asbestiform fibers are defined 'naturally occurring asbestos' (NOA) and refer to the mineral as a natural component of soils or rocks. The release of NOA fibers into the air from rocks or soils by routine human activities or natural weathering processes represents a risk for human beings. Fluoro-edenite (FE) is a NOA fiber detected in the benmoreitic lava in the area of Biancavilla, South-west slope of Mt. Etna. The aim of the present study was to investigate FE immunotoxicity pathways in a group of 38 occupationally exposed construction workers, in order to find any biological markers of its effect...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28338970/woody-plant-ecosystems-under-climate-change-and-air-pollution-response-consistencies-across-zonobiomes
#3
R Matyssek, A R Kozovits, G Wieser, J King, H Rennenberg
Forests store the largest terrestrial pools of carbon (C), helping to stabilize the global climate system, yet are threatened by climate change (CC) and associated air pollution (AP, highlighting ozone (O3) and nitrogen oxides (NOx)). We adopt the perspective that CC-AP drivers and physiological impacts are universal, resulting in consistent stress responses of forest ecosystems across zonobiomes. Evidence supporting this viewpoint is presented from the literature on ecosystem gross/net primary productivity and water cycling...
March 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28336973/microbial-community-composition-is-related-to-soil-biological-and-chemical-properties-and-bacterial-wilt-outbreak
#4
Rui Wang, Hongchun Zhang, Liguang Sun, Gaofu Qi, Shu Chen, Xiuyun Zhao
Soil microbes play important roles in plant growth and health. Little is known about the differences of soil microbes between healthy and bacterial wilt infected soils with Ralstonia solanacearum. By Illumina-MiSeq sequencing of 16S rRNA and 18S rRNA gene amplicons, we found the soil microbial composition and diversity were distinct between healthy and bacterial wilt infected soils. Soil microbial community varied at different plant growth stages due to changes of root exudates composition and soil pH. Healthy soils exhibited higher microbial diversity than the bacterial wilt infected soils...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336605/draft-genome-sequence-of-chromobacterium-subtsugae-mwu12-2387-isolated-from-a-wild-cranberry-bog-in-truro-massachusetts
#5
Kristin Vöing, Alisha Harrison, Scott D Soby
Chromobacterium subtsugae MWU12-2387 was isolated from the rhizosphere of cranberry plants. While it is unknown what environmental role these bacteria play in bog soils, they hold potential as biological control agents against nematodes and insect pests. Potential virulence genes were identified, including the violacein synthesis pathway, siderophores, and several chitinases.
March 23, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28335473/assessment-of-antioxidant-and-cytoprotective-potential-of-jatropha-jatropha-curcas-grown-in-southern-italy
#6
Teresa Papalia, Davide Barreca, Maria Rosaria Panuccio
Jatropha (Jatropha curcas L.) is a plant native of Central and South America, but widely distributed in the wild or semi-cultivated areas in Africa, India, and South East Asia. Although studies are available in literature on the polyphenolic content and bioactivity of Jatropha curcas L., no information is currently available on plants grown in pedoclimatic and soil conditions different from the autochthon regions. The aim of the present work was to characterize the antioxidant system developed by the plant under a new growing condition and to evaluate the polyphenol amount in a methanolic extract of leaves...
March 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335196/gold-nanomaterial-uptake-from-soil-is-not-increased-by-arbuscular-mycorrhizal-colonization-of-solanum-lycopersicum-tomato
#7
Jonathan D Judy, Jason K Kirby, Mike J McLaughlin, Timothy Cavagnaro, Paul M Bertsch
Bioaccumulation of engineered nanomaterials (ENMs) by plants has been demonstrated in numerous studies over the past 5-10 years. However, the overwhelming majority of these studies were conducted using hydroponic systems and the degree to which the addition of the biological and chemical components present in the soil might fundamentally alter the potential of plant bioaccumulation of ENMs is unclear. Here, we used two genotypes of Solanum lycopersicum (tomato), reduced mycorrhizal colonization (rmc), a mutant which does not allow arbuscular mycorrhizal fungi (AMF) colonization, and its progenitor, 76R, to examine how colonization by AMF alters trends of gold ENM bioaccumulation from a natural soil...
April 13, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333395/small-molecules-belowground-the-role-of-specialized-metabolites-in-the-rhizosphere
#8
Hassan Massalha, Elisa Korenblum, Dorothea Tholl, Asaph Aharoni
Soil communities are diverse taxonomically and functionally. This ecosystem experiences highly complex networks of interactions, but may also present functionally independent entities. Plant roots, a metabolically active hotspot in the soil, take an essential part in belowground interactions. While plants are known to release an extremely high portion of the fixated carbon to the soil, less is known about the composition and role of C-containing compounds in the rhizosphere, in particular those involved in chemical communication...
March 23, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28330297/differential-expression-and-characterization-of-cypermethrin-degrading-potential-proteins-in-bacillus-thuringiensis-strain-sg4
#9
Pankaj, Geeta Negi, Saurabh Gangola, Priyanka Khati, Govind Kumar, Anjana Srivastava, Anita Sharma
A cypermethrin-degrading bacterium (SG4) was isolated from the pesticide-contaminated soil in the agricultural field of the crop research centre of the University, and characterized as Bacillus thuringiensis strain, SG4. The bacterium degraded 78.9 % of cypermethrin (50 ppm) in 15 days when grown in a minimal medium. To understand the functional proteins of cypermethrin degradation in Bacillus thuringiensis strain SG4, a comparative proteomic analysis was performed in the presence/absence of cypermethrin after 5 days of incubation in minimal medium...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330260/impact-of-forest-vegetation-on-soil-characteristics-a-correlation-between-soil-biological-and-physico-chemical-properties
#10
L R Chandra, S Gupta, V Pande, N Singh
Temperate and dry deciduous forest covers major portion of terrestrial ecosystem in India. The two forest types with different dominant tree species differ in litter quality and root exudates, thereby exerting species-specific impact on soil properties and microbial activity. This study aims to examine the influence of forest type or dominant tree species on soil physico-chemical properties and its relationship with microbial characters in temperate and dry deciduous forest types. We assessed soil physico-chemical properties among five different sites located within the selected forest stand covered by different dominant species...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330201/dual-action-of-chromium-reducing-and-nitrogen-fixing-bacillus-megaterium-asnf3-for-improved-agro-rehabilitation-of-chromium-stressed-soils
#11
Sumaira Aslam, Ali Hussain, Javed Iqbal Qazi
We conducted a study for enhanced biological rehabilitation of chromium-contaminated soils using a chromium-reducing and nitrogen-fixing bacterial species (Bacillus megaterium-ASNF3). The bacterial species was isolated from a chromium-rich land area, characterized, and employed under optimum conditions for the treatment of artificially prepared chromium-rich soil. The bacterium reduced Cr(VI) up to 86 % in a 60-day trial of incubation in the soil bioreactor. The nitrogenase activity of the bacterium yielded up to 486 nmol of ethylene/mL/h after an incubation period of 40 days when it was optimally cultured in growth medium at neutral pH and 30 °C...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28324279/soil-organic-matter-as-sole-indicator-of-soil-degradation
#12
S E Obalum, G U Chibuike, S Peth, Y Ouyang
Soil organic matter (SOM) is known to play vital roles in the maintenance and improvement of many soil properties and processes. These roles, which largely influence soil functions, are a pool of specific contributions of different components of SOM. The soil functions, in turn, normally define the level of soil degradation, viewed as quantifiable temporal changes in a soil that impairs its quality. This paper aims at providing a generalized assessment of the current state of knowledge on the usefulness of SOM in monitoring soil degradation, based on its influence on the physical, chemical and biological properties and processes of soils...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28319906/functional-characterization-of-gram-negative-bacteria-from-different-genera-as-multiplex-cadmium-biosensors
#13
Lara Bereza-Malcolm, Sanja Aracic, Ruban Kannan, Gülay Mann, Ashley E Franks
Widespread presence of cadmium in soil and water systems is a consequence of industrial and agricultural processes. Subsequent accumulation of cadmium in food and drinking water can result in accidental consumption of dangerous concentrations. As such, cadmium environmental contamination poses a significant threat to human health. Development of microbial biosensors, as a novel alternative method for in situ cadmium detection, may reduce human exposure by complementing traditional analytical methods. In this study, a multiplex cadmium biosensing construct was assembled by cloning a single-output cadmium biosensor element, cadRgfp, and a constitutively expressed mrfp1 onto a broad-host range vector...
March 16, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28318300/bacteria-from-wheat-and-cucurbit-plant-roots-metabolize-pahs-and-aromatic-root-exudates-implications-for-rhizodegradation
#14
Cairn S Ely, Barth F Smets
The chemical interaction between plants and bacteria in the root zone can lead to soil decontamination. Bacteria which degrade PAHs have been isolated from the rhizospheres of plant species with varied biological traits, however, it is not known what phytochemicals promote contaminant degradation. One monocot and two dicotyledon plants were grown in PAH-contaminated soil from a manufactured gas plant (MGP) site. A phytotoxicity assay confirmed greater soil decontamination in rhizospheres when compared to bulk soil controls...
March 20, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28317232/soil-parent-material-a-major-driver-of-plant-nutrient-limitations-in-terrestrial-ecosystems
#15
Laurent Augusto, David L Achat, Mathieu Jonard, David Vidal, Bruno Ringeval
Because the capability of terrestrial ecosystems to fix carbon is constrained by nutrient availability, understanding how nutrients limit plant growth is a key contemporary question. However, what drives nutrient limitations at global scale remains to be clarified. Using global data on plant growth, plant nutritive status, and soil fertility, we investigated to which extent soil parent materials explain nutrient limitations. We found that N limitation was not linked to soil parent materials, but was best explained by climate: ecosystems under harsh (i...
March 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28316424/ovicidal-effect-of-chitinase-and-protease-enzymes-produced-by-soil-fungi-on-the-camel-tick-hyalomma-dromedarii-eggs-acari-ixodidae
#16
Salwa M Habeeb, Heba M Ashry, Moataza M Saad
The aim of this study was to evaluate the effect of chitinase and protease enzymes produced by environmentally safe soil Fungi; Aspergillus sp. NRC 4/5H; Mucor sp. NRC 5; Trichoderma sp. NRC 4/56; Aspergillus sojae; Mucor ranosisinus; Aspergillus oryzae on embryo development of the camel tick Hyalomma dromedarii eggs. The experiment was carried out on the 7 day aged eggs. Concentrations of the chitinase and protease crude enzymes [1:1, 1:2, 1:3, 1:4 and 1:5 (v/v)] were prepared from six stock solutions whose concentrations were 5 units/ml each...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28315231/toxic-elements-in-the-stream-sediments-of-an-urbanized-basin-eastern-china-urbanization-greatly-elevates-their-adverse-biological-effects
#17
Pengbao Wu, Aijing Yin, Xiaohui Yang, Huan Zhang, Manman Fan, Chao Gao
The concentration of toxic elements (Hg, Cd, Cr, Cu, Pb, Zn, Ni and As) was measured in the sediments of the Qinhuai River in Eastern China along a rural to urban gradient. Multiple approaches were undertaken to evaluate the degree of enrichment and adverse biological effects of these elements. The results showed that the concentration of Hg, Cd, Zn, Cu and Pb increased exponentially from the agricultural headwater to the urbanized downstream, which reflects a severe anthropogenic influence. In addition, area-specific references, such as the local soil background (LSB) and upper continental crust (UCC) derived from the Yangtze craton, were more applicable for evaluating the enrichment of toxic elements in the Qinhuai River than was global UCC...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28314395/response-of-the-bacterial-community-in-oil-contaminated-marine-water-to-the-addition-of-chemical-and-biological-dispersants
#18
Camila Rattes de Almeida Couto, Diogo de Azevedo Jurelevicius, Vanessa Marques Alvarez, Jan Dirk van Elsas, Lucy Seldin
The use of dispersants in different stages of the oil production chain and for the remediation of water and soil is a well established practice. However, the choice for a chemical or biological dispersant is still a controversial subject. Chemical surfactants that persist long in the environment may pose problems of toxicity themselves; therefore, biosurfactants are considered to constitute an environmentally friendly and effective alternative. Nevertheless, the putative effects of such agents on the microbiomes of oil-contaminated and uncontaminated marine environments have not been sufficiently evaluated...
December 15, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/28314142/responses-to-silver-nanoparticles-and-silver-nitrate-in-a-battery-of-biomarkers-measured-in-coelomocytes-and-in-target-tissues-of-eisenia-fetida-earthworms
#19
Curieses Silvana Patricia, García-Velasco Nerea, Urionabarrenetxea Erik, Sáenz María Elena, Bilbao Eider, Di Marzio Walter Darío, Soto Manu
The current use and development of applications with silver nanoparticles (Ag NPs) could lead to potential inputs of these NPs to soils. Consequently, it is crucial to understand the ecotoxicological risks posed by Ag NPs in the terrestrial compartment. In the present investigation, the effects produced by PVP-PEI coated Ag NPs were assessed in Eisenia fetida earthworms in comparison with the soluble form (AgNO3). Earthworms were exposed for 1, 3 and 14 days to a range of sublethal concentrations of Ag (0, 0...
March 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28302524/inactivation-of-bacterial-pathogenic-load-in-compost-against-vermicompost-of-organic-solid-waste-aiming-to-achieve-sanitation-goals-a-review
#20
REVIEW
Nuhaa Soobhany, Romeela Mohee, Vinod Kumar Garg
Waste management strategies for organic residues, such as composting and vermicomposting, have been implemented in some developed and developing countries to solve the problem of organic solid waste (OSW). Yet, these biological treatment technologies do not always result in good quality compost or vermicompost with regards to sanitation capacity owing to the presence of bacterial pathogenic substances in objectionable concentrations. The presence of pathogens in soil conditioners poses a potential health hazard and their occurrence is of particular significance in composts and/or vermicomposts produced from organic materials...
March 13, 2017: Waste Management
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