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https://www.readbyqxmd.com/read/29168701/wastewater-pond-systems-using-chemical-precipitation-fellings-dams-state-of-the-art-in-sweden
#1
J Hanaeus, Å Hanaeus
Chemical precipitation in wastewater stabilization ponds - in Scandinavia called fellings dams - has been in operation for more than 50 years. Slaked lime and aluminium salts are the most common chemicals used for precipitation. Long and narrow forms of the ponds and a detention time of at least 5 days have shown, even at a low water temperature and below an ice cover, to produce an average effluent quality of 70 mg CODCr/l, 0.2 mg Tot-P/l, 20 mg Tot-N/l (CODCr: chemical oxygen demand; Tot-P: total phosphorus; Tot-N: total nitrogen) and low levels of pathogenic bacteria...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29150325/ilex-paraguariensis-potential-antioxidant-on-aluminium-toxicity-in-an-experimental-model-of-alzheimer-s-disease
#2
Pâmela M Bortoli, Carla Alves, Eduarda Costa, Ana Paula Vanin, Jéssica R Sofiatti, Diego P Siqueira, Rogério M Dallago, Helen Treichel, Gean Delise L P Vargas, Rosilene R Kaizer
Ilex paraguariensis, yerba mate is a native plant from the southern region of Brazil. Studies showed that yerba mate has an antioxidant potential, which could help to reduce the risk of developing neurodegenerative diseases, as Alzheimer's Disease (AD). It's known that I. paraguariensis grows in acid soils with aluminium (Al), which is bioavailable in these soils. Al has a neurotoxic potential related with the progression of neurological disorders. This study aim was to evaluate the potential of I. paraguariensis in the etiology of AD using strains of Caenorhabditis elegans and the concentration of Al and antioxidants in the yerba mate extract...
November 7, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29133104/imparting-functionality-viz-color-antioxidant-and-antibacterial-properties-to-develop-multifunctional-wool-with-tectona-grandis-leaves-extract-using-reflectance-spectroscopy
#3
Shahid-Ul-Islam, Shahnawaz Ahmad Wani, Faqeer Mohammad
In recent years, considerable attention has been given to plant colorants for use in dyeing applications because of their newly discovered properties such as insect repellency, deodorizing, antioxidant, sun protection, and antibacterial activity. In view of their better biocompatibility, biodegradability, less-toxicity, natural colorants are gaining worldwide interest for producing elegant hues and highly functional value-added textiles. In the present work, we investigated the coloring and functional finishing of wool with Tectona grandis L leaves extract with the emphasis on effect of metallic salt mordants on colorimetric potential, fastness, radical scavenging potential, and antibacterial activity in an attempt to develop bioactive fibres for use in health care applications...
November 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29101278/altered-expression-of-a-malate-permeable-anion-channel-osalmt4-disrupts-mineral-nutrition
#4
Jie Liu, Meixue Zhou, Emmanuel Delhaize, Peter R Ryan
Aluminium-activated malate transporters (ALMT) form a family of anions channels in plants but little is known about most of its members. This study examined the function of OsALMT4 from rice (Oryza sativa L.). We show that OsALMT4 is expressed in roots and shoots and the OsALMT4 protein localizes to the plasma membrane. Transgenic rice lines over-expressing (OX) OsALMT4 released malate from the roots constitutively and had two-fold higher malate concentrations in the xylem sap than nulls indicating greater concentrations of malate in the apoplast...
November 3, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29045801/plant-growth-promoting-rhizobacteria-bacillus-subtilis-rr4-isolated-from-rice-rhizosphere-induces-malic-acid-biosynthesis-in-rice-roots
#5
Kandaswamy Rekha, Baburaj Baskar, Santhanam Srinath, Balasundaram Usha
Malic acid, one of the major organic acid exudates from roots, plays a significant role in the chemotaxis of beneficial bacteria to the plant's rhizosphere. In this study, the effect of a plant growth promoting rhizobacterium, Bacillus subtilis RR4, on the synthesis and exudation of malic acid (MA) from roots is demonstrated in rice. To test the chemotactic ability of RR4 towards MA, capillary chemotaxis assay was performed which revealed a positive response (relative chemotactic ratio of 6.15 with 10 µM MA) and with increasing concentrations of MA, an elevated chemotactic response was observed...
October 18, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29038478/herbivores-increase-the-global-availability-of-nutrients-over-millions-of-years
#6
Christopher E Doughty
Can the presence of herbivores increase global nutrient availability? Animals disperse vital nutrients through ecosystems, increasing the spatial availability of these nutrients. Large herbivores are especially important for the dispersal of vital nutrients due to their long food passage times and day ranges, and large herbivores from past periods (the Pleistocene) may have increased nutrient concentrations on the continental scale. However, such results have been demonstrated theoretically but not yet empirically...
October 16, 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/28994596/16s-rrna-gene-amplicon-sequencing-reveals-significant-changes-in-microbial-compositions-during-cyanobacteria-laden-drinking-water-sludge-storage
#7
Haiyan Pei, Hangzhou Xu, Jingjing Wang, Yan Jin, Hongdi Xiao, Chunxia Ma, Jiongming Sun, Hongmin Li
This is the first study to systematically investigate the microbial community structure in cyanobacteria-laden drinking water sludge generated by different types of coagulants (including AlCl3, FeCl3, and polymeric aluminum ferric chloride (PAFC)) using Illumina 16S rRNA gene MiSeq sequencing. Results show that Cyanobacteria, Proteobacteria, Firmicutes, Bacteroidetes, Verrucomicrobia, and Planctomycetes were the most dominant phyla in sludge, and because of the toxicity of high Al and Fe level in AlCl3 and FeCl3 sludges, respectively, the PAFC sludge exhibited greater microbial richness than that in AlCl3 and FeCl3 sludges...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28968214/effect-of-microbial-inoculation-in-combating-the-aluminium-toxicity-effect-on-growth-of-zea-mays
#8
P Arora, G Singh, A Tiwari
The present study is aimed at improving the aluminium tolerance in maize crop employing the potential of microbial inoculants in conferring resistance to these toxicities via production of certain chelating compounds like siderophores, exopolysachharides and organic acids. Acid soils have now-a-days become one of the key factors for limiting growth of many agriculturally important crops. Aluminium  is one of the major elements present in acid soils and is mainly responsible for toxicity in the soil. This aluminium is rapidly soluble in soil water and hence absorbed by plant roots under conditions where soil pH is below 5...
July 31, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28957760/comprehensive-evaluation-of-three-sets-of-advanced-wastewater-treatment-trains-for-treating-secondary-effluent-organic-micro-pollutants-and-bio-toxicity
#9
Zhiqiang Chen, Mo Li, Qinxue Wen
The environmental presence of organic micro-pollutants (OMPs) has posed increasing risks on aquatic organism and human health. The performance of three commonly used advanced wastewater treatment trains, coagulation-sand filter, coagulation-biological aerated filter (BAF) and ozonation-biological activated carbon (BAC), in removing fifteen residual contaminants and bio-toxicity of the effluent from a local municipal wastewater treatment plant (WWTP) were investigated. Relatively high level of OMPs (0.69-14...
September 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28874508/aba-induced-stomatal-closure-involves-almt4-a-phosphorylation-dependent-vacuolar-anion-channel-of-arabidopsis
#10
Cornelia Eisenach, Ulrike Baetz, Nicola V Huck, Jingbo Zhang, Alexis De Angeli, Gerold Beckers, Enrico Martinoia
Stomatal pores are formed between a pair of guard cells, and allow plant uptake of CO2 and water evaporation. Their aperture depends on changes in osmolyte concentration of guard cell vacuoles, specifically of K+ and Mal2-. Efflux of Mal2- from the vacuole is required for stomatal closure; however, it is not clear how the anion is released. Here we report the identification of ALMT4 (ALUMINIUM ACTIVATED MALATE TRANSPORTER 4) as an Arabidopsis thaliana ion channel that can mediate Mal2- release from the vacuole and is required for stomatal closure in response to abscisic acid (ABA)...
September 5, 2017: Plant Cell
https://www.readbyqxmd.com/read/28828287/concurrent-production-and-relative-quantification-of-vasicinone-from-in-vivo-and-in-vitro-plant-parts-of-malabar-nut-adhatoda-vasica-nees
#11
Jitendriya Panigrahi, Saikat Gantait, Illa C Patel
The present study documents a simultaneous production and comparative assessment of extracted vasicinone from in vivo (leaves and stems) and in vitro (leaves, stems and calli) plant parts of Adhatoda vasica Nees, a well-known medicinal plant. High-performance thin layer chromatography (HPTLC) analysis of the above-mentioned plant parts, collected at their 60-day-old growth stage, was performed via methanolic extraction and with the aid of toluene:butanol:butyl acetate (9:0.5:0.5; v/v/v) solvent system. The method was validated with the help of aluminium sheet precoated with silica gel 60 F254 TLC plates, following the ICH guidelines in order to maintain accuracy, precision and repeatability...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28818756/interactions-between-aluminium-iron-and-silicon-in-cucumber-sativus-l-grown-under-acidic-conditions
#12
Nikolai P Bityutskii, Kirill L Yakkonen, Anastasiya I Petrova, Alexey L Shavarda
Aluminium (Al) is one of the major stressors for plants in acidic soils, negatively affecting plant growth and nutrient balances. Significant efforts have been undertaken to understand mechanisms of Al tolerance in plants. However, little is known of the relevance of iron (Fe) and silicon (Si) nutrition under Al stress conditions. The objectives of this study were to determine whether effects induced by Fe and Si are of importance for limitation of Al moving via xylem in plants (Cucumis sativus L.). Cucumber plants (cv...
August 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28772864/ecotoxicity-of-concretes-with-granulated-slag-from-gray-iron-pilot-production-as-filler
#13
Helena Hybská, Emília Hroncová, Juraj Ladomerský, Karol Balco, Jozef Mitterpach
This paper focuses on research concerning the ecotoxicological properties of granulated slag from the pilot production of gray iron with red mud addition and concrete composites with the application of this slag. Red mud is a hazardous waste generated in the production of aluminium oxide. Negative ecotoxicological tests are, therefore, one of the basic prerequisites for the ability to use granulated slag from gray iron pilot production. Granulated slag and concrete composite samples with various ratios of granulated slag have been subject to ecotoxicity tests: determining root growth inhibition in the highly-cultivated plant Sinapisalba, and determining acute toxicity in Daphniamagna...
May 6, 2017: Materials
https://www.readbyqxmd.com/read/28745369/chlorogenic-acid-protects-against-aluminium-induced-cytotoxicity-through-chelation-and-antioxidant-actions-in-primary-hippocampal-neuronal-cells
#14
Xiaomei Wang, Xinguang Fan, Shuzhi Yuan, Wenxiao Jiao, Bangdi Liu, Jiankang Cao, Weibo Jiang
Chlorogenic acid (CGA), a major polyphenolic component of many plants, displays antioxidant and neuroprotective properties in neurodegenerative diseases. To investigate whether CGA may influence aluminium (Al) induced cytotoxicity, aluminium chloride (50 μM Al) was administered in primary hippocampal neuronal cells presupplemented with CGA (10, 50 and 100 μM). Our study shows that the exposure to Al caused cell death, Al(3+) accumulation, reactive oxygen species generation and mitochondrial damage in cells...
August 1, 2017: Food & Function
https://www.readbyqxmd.com/read/28699117/determination-of-total-mercury-in-aluminium-industrial-zones-and-soil-contaminated-with-red-mud
#15
Oqil Rasulov, Andrea Zacharová, Marián Schwarz
This study investigated total mercury contents in areas impacted by aluminium plants in Tajikistan and Slovakia and in one area flooded with red mud in Hungary. We present the first determination of total mercury contents in the near-top soil (0-10 and 10-20 cm) in Tajikistan and the first comparative investigation of Tajikistan-Slovakia-Hungary. The Tajik Aluminium Company (TALCO) is one of the leading producers of primary aluminium in Central Asia. In the past 30 years, the plant has been producing large volumes of industrial waste, resulting in negative impacts on soil, groundwater and air quality of the surrounding region...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28668601/application-of-high-temperature-phase-change-materials-for-improved-efficiency-in-waste-to-energy-plants
#16
Fabio Dal Magro, Haoxin Xu, Gioacchino Nardin, Alessandro Romagnoli
This study reports the thermal analysis of a novel thermal energy storage based on high temperature phase change material (PCM) used to improve efficiency in waste-to-energy plants. Current waste-to-energy plants efficiency is limited by the steam generation cycle which is carried out with boilers composed by water-walls (i.e. radiant evaporators), evaporators, economizers and superheaters. Although being well established, this technology is subjected to limitations related with high temperature corrosion and fluctuation in steam production due to the non-homogenous composition of solid waste; this leads to increased maintenance costs and limited plants availability and electrical efficiency...
June 28, 2017: Waste Management
https://www.readbyqxmd.com/read/28611497/stress-tolerant-viridibacillus-arenosi-strain-ihb-b-7171-from-tea-rhizosphere-as-a-potential-broad-spectrum-microbial-inoculant
#17
Rishu Thakur, K C Sharma, Ashu Gulati, R K Sud, Arvind Gulati
Viridibacillus arenosi strain IHB B 7171 identified based on 16S rRNA gene sequence produced colony forming units (cfu/ml) ranging from 3.3 × 10(4) to 1.2 × 10(10) under pH 5-11, 2.2 × 10(2) to 1.4 × 10(10) for temperature 5-40 °C, 2.4 × 10(2) to 1.1 × 10(10) for PEG 6000 10-30%, 2.2 × 10(2) to 1.4 × 10(10) for 2.5-10% NaCl, 3.1 × 10(3) to 1.7 × 10(9) for 2.5-7.5 mM CaCl2, 2.2 × 10(2) to 1.4 × 10(7) for 2.5-7.5 mM AlCl3, and 3.2 × 10(2) to 1.2 × 10(7) for 2.5-7...
June 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/28602286/studying-radiolytic-ageing-of-nuclear-power-plant-electric-cables-with-ftir-spectroscopy
#18
A Levet, J Colombani, L Duponchel
Due to the willingness to extend the nuclear power plants length of life, it is of prime importance to understand long term ageing effect on all constitutive materials. For this purpose gamma-irradiation effects on insulation of instrumentation and control cables are studied. Mid-infrared spectroscopy and principal components analysis (PCA) were used to highlight molecular modifications induced by gamma-irradiation under oxidizing conditions. In order to be closer to real world conditions, a low dose rate of 11Gyh(-1) was used to irradiate insulations in full cable or alone with a dose up to 58 kGy...
September 1, 2017: Talanta
https://www.readbyqxmd.com/read/28576325/distinct-physiological-and-molecular-responses-in-arabidopsis-thaliana-exposed-to-aluminum-oxide-nanoparticles-and-ionic-aluminum
#19
Yujian Jin, Xiaoji Fan, Xingxing Li, Zhenyan Zhang, Liwei Sun, Zhengwei Fu, Michel Lavoie, Xiangliang Pan, Haifeng Qian
Nano-aluminium oxide (nAl2O3) is one of the most widely used nanomaterials. However, nAl2O3 toxicity mechanisms and potential beneficial effects on terrestrial plant physiology remain poorly understood. Such knowledge is essential for the development of robust nAl2O3 risk assessment. In this study, we studied the influence of a 10-d exposure to a total selected concentration of 98 μM nAl2O3 or to the equivalent molar concentration of ionic Al (AlCl3) (196 μM) on the model plant Arabidopsis thaliana on the physiology (e...
September 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28539100/production-of-thermal-insulation-blocks-from-bottom-ash-of-fluidized-bed-combustion-system
#20
A K Mandal, O P Sinha
The issues of disposal and environmental problems are increased by the generation of bottom ash from the thermal power plants day by day; hence, its recycling is required. The present study aimed to make thermal insulation blocks using as raw material bottom ash and iron ore slime as a binder and to characterize their engineering properties. Two different fineness values of bottom ash were considered with varying amounts of iron ore slime (0-10%) to make the blocks. Blocks were dried followed by firing at 1000, 1100 and 1200°C, respectively...
May 1, 2017: Waste Management & Research
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