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https://www.readbyqxmd.com/read/28208090/multi-approach-characterization-of-organic-sediment-produced-by-an-anaerobic-digestion-plant-fed-with-pig-slurry-and-stored-for-a-long-term-in-a-lagoon
#1
Anna Ricci, Luisa Massaccesi, Daniela Pezzolla, Giuseppe Corti, Alberto Agnelli, Giovanni Gigliotti
This study combined different approaches to characterize organic sediments produced by an anaerobic digestion plant feed with pig slurry, and accumulated for many years in a lagoon. The results of all analyses identified a certain homogeneity of the sediments. As a consequence of the pig diet, the sediment contained an high concentration of Zn (about 4gkg(-1)) and Cu (about 1.2gkg(-1)), which were mostly associated to the particles with a size ranging from 2 to 53μm. The sediment was made of large amount of organic matter, mostly cellulose and recalcitrant molecules, and 30-40% mineral fraction...
February 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28206742/influence-of-the-mixing-energy-consumption-affecting-coagulation-and-floc-aggregation
#2
Yamuna Srinivasan Vadasarukkai, Graham A Gagnon
The operational significance of energy-intensive rapid mixing processes remains unaddressed in coagulation and flocculation of insoluble precipitates (flocs), which play an important role in the removal of impurities from drinking water supplies. In this study, the influence of rapid mixing and associated mixing energy on floc aggregation was examined for a surface water source characterized by a high fraction of aquatic humic matter. Infrared spectral analyses showed that the colloidal complexes resulting from ligand exchange between iron and dissolved natural organic matter (DOM) were not substantially influenced by the mixing energy input...
February 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28199876/the-effect-of-sewage-sludge-application-on-soil-properties-and-willow-salix-sp-cultivation
#3
Magdalena Urbaniak, Anna Wyrwicka, Wojciech Tołoczko, Liliana Serwecińska, Marek Zieliński
The aim of the study was to determine the impact of sewage sludge from three wastewater treatment plants of different sizes (small, medium and large) applied in two doses (3 and 9 tons per hectare) on soil properties, determined as the content of organic carbon and humus fractions, bacterial abundance, phytotoxicity and PCDD/PCDF TEQ concentrations. The study also evaluated the impact of this sewage sludge on the biometric and physiological parameters and detoxification reaction of willow (Salix sp.) as a typical crop used for the remediation of soil following sludge application...
February 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28190388/protein-kinases-in-shaping-plant-architecture
#4
Juan Wu, Bo Wang, Xiaoyun Xin, Dongtao Ren
Plant architecture, the three-dimensional organization of the plant body, includes the branching pattern and the size, shape, and position of organs. Plant architecture is genetically controlled and is influenced by environmental conditions. The regulations occur at most of the stages from the first division of the fertilized eggs to the final establishment of plant architecture. Among the various endogenous regulators, protein kinases and their associated signaling pathways have been shown to play important roles in regulating the process of plant architecture establishment...
February 9, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28188423/photosynthetic-antenna-engineering-to-improve-crop-yields
#5
Henning Kirst, Stéphane T Gabilly, Krishna K Niyogi, Peggy G Lemaux, Anastasios Melis
Evidence shows that decreasing the light-harvesting antenna size of the photosystems in tobacco helps to increase the photosynthetic productivity and plant canopy biomass accumulation under high-density cultivation conditions. Decreasing, or truncating, the chlorophyll antenna size of the photosystems can theoretically improve photosynthetic solar energy conversion efficiency and productivity in mass cultures of algae or plants by up to threefold. A Truncated Light-harvesting chlorophyll Antenna size (TLA), in all classes of photosynthetic organisms, would help to alleviate excess absorption of sunlight and the ensuing wasteful non-photochemical dissipation of excitation energy...
February 10, 2017: Planta
https://www.readbyqxmd.com/read/28185558/economic-importance-taxonomic-representation-and-scientific-priority-as-drivers-of-genome-sequencing-projects
#6
Geneviève C Vallée, Daniella Santos Muñoz, David Sankoff
BACKGROUND: Of the approximately two hundred sequenced plant genomes, how many and which ones were sequenced motivated by strictly or largely scientific considerations, and how many by chiefly economic, in a wide sense, incentives? And how large a role does publication opportunity play? RESULTS: In an integration of multiple disparate databases and other sources of information, we collect and analyze data on the size (number of species) in the plant orders and families containing sequenced genomes, on the trade value of these species, and of all the same-family or same-order species, and on the publication priority within the family and order...
November 11, 2016: BMC Genomics
https://www.readbyqxmd.com/read/28178932/variability-among-cucurbitaceae-species-melon-cucumber-and-watermelon-in-a-genomic-region-containing-a-cluster-of-nbs-lrr-genes
#7
Jordi Morata, Pere Puigdomènech
BACKGROUND: Cucurbitaceae species contain a significantly lower number of genes coding for proteins with similarity to plant resistance genes belonging to the NBS-LRR family than other plant species of similar genome size. A large proportion of these genes are organized in clusters that appear to be hotspots of variability. The genomes of the Cucurbitaceae species measured until now are intermediate in size (between 350 and 450 Mb) and they apparently have not undergone any genome duplications beside those at the origin of eudicots...
February 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28177420/small-reservoirs-as-a-beneficial-management-practice-for-nitrogen-removal
#8
Raea M Gooding, Helen M Baulch
There are few beneficial management practices (BMPs) with demonstrated efficacy in snowmelt-dominated regions. Small reservoirs are a BMP that can help mitigate flooding and reduce sediment transport, while reducing export of dissolved nutrients. To understand controls on nitrate removal and assess how this ecosystem service can be optimized, denitrification activity was measured in reservoirs and stream pools of the Tobacco Creek Model Watershed (Manitoba, Canada) via the chloramphenicol-amended acetylene block technique...
January 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28174661/movement-patterns-of-a-keystone-waterbird-species-are-highly-predictable-from-landscape-configuration
#9
Erik Kleyheeg, Jacintha G B van Dijk, Despina Tsopoglou-Gkina, Tara Y Woud, Dieuwertje K Boonstra, Bart A Nolet, Merel B Soons
BACKGROUND: Movement behaviour is fundamental to the ecology of animals and their interactions with other organisms, and as such contributes to ecosystem dynamics. Waterfowl are key players in ecological processes in wetlands and surrounding habitats through predator-prey interactions and their transportation of nutrients and other organisms. Understanding the drivers of their movement behaviour is crucial to predict how environmental changes affect their role in ecosystem functioning...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28168980/characterisation-of-the-dynamics-of-organic-contaminants-n-alkanes-pahs-and-pcbs-in-a-coastal-area
#10
Agung Dhamar Syakti, Benjamin Oursel, Cedric Garnier, Pierre Doumenq
The dynamics of three classes of organic contaminants, namely n-alkanes, polycyclic aromatic hydrocarbons and polychlorinated biphenyls, were evaluated from the settled suspended particulate matter (SPM) of two wastewater treatment plant outlets (O1 and O2) at the Marseille coast. We used a 1-m-high Plexiglas settling column filled with 7L of seawater to determine the particles' settling rates, size distribution, and the extent of organic contaminants. Six classes of SPM (50-200μm particles size) were obtained from 15 fractions of 500-mL successive filtering samples ranging from 30s to 5days, including those in the tube wall...
February 3, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28167503/ubiquitylation-activates-a-peptidase-that-promotes-cleavage-and-destabilization-of-its-activating-e3-ligases-and-diverse-growth-regulatory-proteins-to-limit-cell-proliferation-in-arabidopsis
#11
Hui Dong, Jack Dumenil, Fu-Hao Lu, Li Na, Hannes Vanhaeren, Christin Naumann, Maria Klecker, Rachel Prior, Caroline Smith, Neil McKenzie, Gerhard Saalbach, Liangliang Chen, Tian Xia, Nathalie Gonzalez, Mathilde Seguela, Dirk Inze, Nico Dissmeyer, Yunhai Li, Michael W Bevan
The characteristic shapes and sizes of organs are established by cell proliferation patterns and final cell sizes, but the underlying molecular mechanisms coordinating these are poorly understood. Here we characterize a ubiquitin-activated peptidase called DA1 that limits the duration of cell proliferation during organ growth in Arabidopsis thaliana The peptidase is activated by two RING E3 ligases, Big Brother (BB) and DA2, which are subsequently cleaved by the activated peptidase and destabilized. In the case of BB, cleavage leads to destabilization by the RING E3 ligase PROTEOLYSIS 1 (PRT1) of the N-end rule pathway...
February 6, 2017: Genes & Development
https://www.readbyqxmd.com/read/28144916/plant-mediated-synthesis-of-silver-nanoparticles-and-their-stabilization-by-wet-stirred-media-milling
#12
Matej Baláž, Ľudmila Balážová, Nina Daneu, Erika Dutková, Miriama Balážová, Zdenka Bujňáková, Yaroslav Shpotyuk
Within this study, a stable nanosuspension of silver nanoparticles (Ag NPs) was prepared using a two-step synthesis and stabilization approach. The Ag NPs were synthesized from a silver nitrate solution using the Origanum vulgare L. plant extract as the reducing agent. The formation of nanoparticles was finished upon 15 min, and subsequently, stabilization by polyvinylpyrrolidone (PVP) using wet stirred media milling was applied. UV-Vis spectra have shown a maximum at 445 nm, corresponding to the formation of spherical Ag NPs...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28144870/spatial-distribution-and-concentration-of-sulfur-in-relation-to-vegetation-cover-and-soil-properties-on-a-reclaimed-sulfur-mine-site-southern-poland
#13
Justyna Likus-Cieślik, Marcin Pietrzykowski, Marta Szostak, Melanie Szulczewski
This work aims to assess the spatial distribution and concentration of sulfur in the topsoil layer and to determine the relationships between sulfur concentration, soil pH, soil electrical conductivity, and plant cover at the reforested site of the former sulfur mine (Southern Poland). Soil samples were collected from 0 to 20 cm (topsoil) from a total of 86 sampling points in a regular square grid with sides of 150 m. Plant cover was assayed in circular plots with an area of 100 m(2), divided into a woody plant layer and herbaceous plant layer...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28143404/conservation-and-diversification-of-the-mir166-family-in-soybean-and-potential-roles-of-newly-identified-mir166s
#14
Xuyan Li, Xin Xie, Ji Li, Yuhai Cui, Yanming Hou, Lulu Zhai, Xiao Wang, Yanli Fu, Ranran Liu, Shaomin Bian
BACKGROUND: microRNA166 (miR166) is a highly conserved family of miRNAs implicated in a wide range of cellular and physiological processes in plants. miR166 family generally comprises multiple miR166 members in plants, which might exhibit functional redundancy and specificity. The soybean miR166 family consists of 21 members according to the miRBase database. However, the evolutionary conservation and functional diversification of miR166 family members in soybean remain poorly understood...
February 1, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28137747/2b-or-not-2b-experimental-evolution-of-functional-exogenous-sequences-in-a-plant-rna-virus
#15
Anouk Willemsen, Mark P Zwart, Silvia Ambrós, José L Carrasco, Santiago F Elena
Horizontal gene transfer (HGT) is pervasive in viruses, and thought to be a key mechanism in their evolution. On the other hand, strong selective constraints against increasing genome size are an impediment for HGT, rapidly purging horizontally transferred sequences and thereby potentially hindering evolutionary innovation. Here we explore experimentally the evolutionary fate of viruses with simulated HGT events, using the plant RNA virus Tobacco etch virus (TEV), by separately introducing two functional, exogenous sequences to its genome...
January 30, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28133595/investigation-of-spiral-wound-membrane-modules-for-the-cross-flow-nanofiltration-of-fermentation-broth-obtained-from-a-pilot-plant-fermentation-reactor-for-the-continuous-production-of-lactic-acid
#16
Hendrik Laube, Roland Schneider, Joachim Venus
BACKGROUND: The separation performance of seven polymer membranes for the nanofiltration of sodium lactate in fermentation broth was investigated. Each module was introduced into the test stand, and the system curve was obtained by recording the permeate flow velocity at different pump head levels. Performance benchmarks were good permeate quality, as determined by high permeate flow velocity, high sodium lactic concentration, low ion impurity concentration, and low organic impurity concentration...
2017: Bioresources and Bioprocessing
https://www.readbyqxmd.com/read/28132192/looking-for-phosphate-accumulating-bacteria-in-activated-sludge-processes-a-multidisciplinary-approach
#17
Cédric Tarayre, Raphaëlle Charlier, Anissa Delepierre, Alison Brognaux, Julien Bauwens, Frédéric Francis, Michaël Dermience, Georges Lognay, Bernard Taminiau, Georges Daube, Philippe Compère, Erik Meers, Evi Michels, Frank Delvigne
Over the past decades, an increasing need in renewable resources has progressively appeared. This trend concerns not only fossil fuels but also mineral resources. Wastewater and sewage sludge contain significant concentrations in phosphate and can be considered as a fertilizer source of the utmost importance. In wastewater treatment plants, the biological uptake of phosphate is performed by a specific microbiota: the phosphate-accumulating organisms. These microorganisms are recovered in sewage sludge. Here, we aimed to investigate the occurrence of phosphate accumulators in four wastewater treatment plants...
January 29, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28119199/whole-genome-sequence-of-the-soybean-aphid-aphis-glycines
#18
Jacob A Wenger, Bryan J Cassone, Fabrice Legeai, J Spencer Johnston, Raman Bansal, Ashley D Yates, Brad S Coates, Vitor A C Pavinato, Andy Michel
Aphids are emerging as model organisms for both basic and applied research. Of the 5,000 estimated species, only three aphids have published whole genome sequences: the pea aphid Acyrthosiphon pisum, the Russian wheat aphid, Diuraphis noxia, and the green peach aphid, Myzus persicae. We present the whole genome sequence of a fourth aphid, the soybean aphid (Aphis glycines), which is an extreme specialist and an important invasive pest of soybean (Glycine max). The availability of genomic resources is important to establish effective and sustainable pest control, as well as to expand our understanding of aphid evolution...
January 22, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28114894/evolutional-dynamics-of-45s-and-5s-ribosomal-dna-in-ancient-allohexaploid-atropa-belladonna
#19
Roman A Volkov, Irina I Panchuk, Nikolai V Borisjuk, Marta Hosiawa-Baranska, Jolanta Maluszynska, Vera Hemleben
BACKGROUND: Polyploid hybrids represent a rich natural resource to study molecular evolution of plant genes and genomes. Here, we applied a combination of karyological and molecular methods to investigate chromosomal structure, molecular organization and evolution of ribosomal DNA (rDNA) in nightshade, Atropa belladonna (fam. Solanaceae), one of the oldest known allohexaploids among flowering plants. Because of their abundance and specific molecular organization (evolutionarily conserved coding regions linked to variable intergenic spacers, IGS), 45S and 5S rDNA are widely used in plant taxonomic and evolutionary studies...
January 23, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28112921/fungal-laccase-catalyzed-oxidation-of-naturally-occurring-phenols-for-enhanced-germination-and-salt-tolerance-of-arabidopsis-thaliana-a-green-route-for-synthesizing-humic-like-fertilizers
#20
Joon-Yung Cha, Tae-Wan Kim, Jung Hoon Choi, Kyoung-Soon Jang, Laila Khaleda, Woe-Yeon Kim, Jong-Rok Jeon
Fungal laccases have been highlighted as a catalytic tool for transforming phenols. Here we demonstrate that fungal laccase-catalyzed oxidations can transform naturally occurring phenols into plant fertilizers with properties very similar to those of commercial humic acids. Treatments of Arabidopsis thaliana with highly cross-linked polyphenolic products obtained from a mixture of catechol and vanillic acid were able to enhance the germination and salt tolerance of this plant. These results revealed that humic-like organic fertilizers can be produced via in vitro enzymatic oxidation reactions...
February 6, 2017: Journal of Agricultural and Food Chemistry
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