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https://www.readbyqxmd.com/read/28550811/influence-of-solids-residence-time-and-carbon-storage-on-nitrogen-and-phosphorus-recovery-by-microalgae-across-diel-cycles
#1
D A Gardner-Dale, I M Bradley, J S Guest
Microalgal treatment systems could advance nutrient recovery from wastewater by achieving effluent nitrogen (N) and phosphorus (P) levels below the current limit of technology, but their successful implementation requires an understanding of how design decisions influence nutrient uptake over daily (i.e., diel) cycles. This work demonstrates the ability to influence microalgal N:P recovery ratio via solids residence time (SRT) while maintaining complete nutrient removal across day/night cycles through carbon storage and mobilization...
May 18, 2017: Water Research
https://www.readbyqxmd.com/read/28550773/susceptibility-resistance-and-resilience-of-anammox-biomass-to-nanoscale-copper-stress
#2
Zheng-Zhe Zhang, Hai-Yan Hu, Jia-Jia Xu, Zhi-Jian Shi, Yang-Yang Shen, Man-Ling Shi, Ren-Cun Jin
The increasing use of engineered nanoparticles (NPs) poses an emerging challenge to biological wastewater treatment. The long-term impact of CuNPs on anaerobic ammonium oxidation (anammox) process was firstly investigated in this study. The nitrogen removal capacity of anammox reactor was nearly deprived within 30days under the stress of 5.0mgL(-1) CuNPs and the relative abundance of anammox bacteria (Ca. Kuenenia) was decreased from 29.59% to 17.53%. Meanwhile, copper resistance genes associated with the Cus, Cop and Pco systems were enriched to eliminate excess intracellular copper...
May 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28550630/the-effects-of-different-sewage-sludge-amendment-rates-on-the-heavy-metal-bioaccumulation-growth-and-biomass-of-cucumbers-cucumis-sativus-l
#3
Ebrahem M Eid, Sulaiman A Alrumman, Ahmed F El-Bebany, Abd El-Latif Hesham, Mostafa A Taher, Khaled F Fawy
When sewage sludge is incorrectly applied, it may adversely impact agro-system productivity. Thus, this study addresses the reaction of Cucumis sativus L. (cucumber) to different amendment rates (0, 10, 20, 30, 40 and 50 g kg(-1)) of sewage sludge in a greenhouse pot experiment, in which the plant growth, heavy metal uptake and biomass were evaluated. A randomized complete block design with six treatments and six replications was used as the experimental design. The soil electrical conductivity, organic matter and Cr, Fe, Zn and Ni concentrations increased, but the soil pH decreased in response to the sewage sludge applications...
May 26, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28550516/mapping-the-spatio-temporal-distribution-of-key-vegetation-cover-properties-in-lowland-river-reaches-using-digital-photography
#4
Veerle Verschoren, Jonas Schoelynck, Kerst Buis, Fleur Visser, Patrick Meire, Stijn Temmerman
The presence of vegetation in stream ecosystems is highly dynamic in both space and time. A digital photography technique is developed to map aquatic vegetation cover at species level, which has a very high spatial and a flexible temporal resolution. A digital single-lens reflex (DSLR) camera mounted on a handheld telescopic pole is used. The low-altitude (5 m) orthogonal aerial images have a low spectral resolution (red-green-blue), high spatial resolution (∼1.9 pixels cm(-2), ∼1.3 cm length) and flexible temporal resolution (monthly)...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28550412/differential-expression-of-poplar-sucrose-nonfermenting1-related-protein-kinase-2-genes-in-response-to-abiotic-stress-and-abscisic-acid
#5
Xiang Yu, Arika Takebayashi, Taku Demura, Misato Ohtani
Knowledge on the responses of woody plants to abiotic stress can inform strategies to breed improved tree varieties and to manage tree species for environmental conservation and the production of lignocellulosic biomass. In this study, we examined the expression patterns of poplar (Populus trichocarpa) genes encoding members of the sucrose nonfermenting1-related protein kinase 2 (SnRK2) family, which are core components of the abiotic stress response. The P. trichocarpa genome contains twelve SnRK2 genes (PtSnRK2...
May 26, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28550339/effect-of-fungal-endophytes-on-biomass-yield-nutritive-value-and-accumulation-of-minerals-in-ornithopus-compressus
#6
Oscar Santamaria, Santiago Lledó, Sara Rodrigo, Maria J Poblaciones
Yellow serradella (Ornithopus compressus), a valuable pasture species in Mediterranean areas, presents a high diversity of endophytic mycoflora. In the present work, the hypothesis of a significant effect of fungal endophytic species on the parameters of forage production, nutritive value and mineral status of herbage was tested. O. compressus plants were inoculated with each of seven endophytes (four in 2012/2013 and three in 2013/2014). After inoculation, two experiments (under greenhouse and field conditions) were established...
May 27, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28550281/decadal-variations-in-eastern-canada-s-taiga-wood-biomass-production-forced-by-ocean-atmosphere-interactions
#7
Etienne Boucher, Antoine Nicault, Dominique Arseneault, Yves Bégin, Mehdi Pasha Karami
Across Eastern Canada (EC), taiga forests represent an important carbon reservoir, but the extent to which climate variability affects this ecosystem over decades remains uncertain. Here, we analyze an extensive network of black spruce (Picea mariana Mill.) ring width and wood density measurements and provide new evidence that wood biomass production is influenced by large-scale, internal ocean-atmosphere processes. We show that while black spruce wood biomass production is primarily governed by growing season temperatures, the Atlantic ocean conveys heat from the subtropics and influences the decadal persistence in taiga forests productivity...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550150/cellulose-synthesis-and-cell-expansion-are-regulated-by-different-mechanisms-in-growing-arabidopsis-hypocotyls
#8
Alexander A Ivakov, Anna Flis, Federico Apelt, Maximilian Fuenfgeld, Ulrike Scherer, Mark Stitt, Friedrich Kragler, Kris Vissenberg, Staffan Persson, Dmitry Suslov
Plant growth is sustained by two complementary processes - biomass biosynthesis and cell expansion. The cell wall is crucial to both as it forms the majority of biomass, while its extensibility limits cell expansion. Cellulose is a major component of the cell wall and cellulose synthesis is pivotal to plant cell growth and its regulation is poorly understood. Using periodic diurnal variation in Arabidopsis thaliana hypocotyl growth, we found that cellulose synthesis and cell expansion can be uncoupled and are regulated by different mechanisms...
May 26, 2017: Plant Cell
https://www.readbyqxmd.com/read/28550062/engineering-of-a-hyperthermophilic-archaeon-thermococcus-kodakarensis-that-displays-chitin-dependent-hydrogen-production
#9
Mehwish Aslam, Ayumi Horiuchi, Jan-Robert Simons, Savyasachee Jha, Masahiro Yamada, Toru Odani, Rikako Fujimoto, Yasuyuki Yamamoto, Ryoma Gunji, Tadayuki Imanaka, Tamotsu Kanai, Haruyuki Atomi
Thermococcus kodakarensis is a hyperthermophilic archaeon that harbors a complete set of genes for chitin degradation to fructose 6-phosphate. However, wild-type T. kodakarensis KOD1 does not display growth on chitin. In this study, we developed a T. kodakarensis strain that can grow on chitin via genetic and adaptive engineering. First, a chitinase overproduction strain (KC01) was constructed by replacing the chitinase gene promoter with a strong promoter from the cell-surface glycoprotein gene, resulting in increased degradation of swollen chitin and accumulation of N-, N'-diacetylchitobiose in the medium...
May 26, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28549810/biodiesel-production-from-microbial-oil-derived-from-wood-isolate-trichoderma-reesei
#10
B Bharathiraja, V Sowmya, Sridevi Sridharan, D Yuvaraj, J Jayamuthunagai, R Praveenkumar
In the present study Trichoderma reesei, a wood isolate can yield high biomass quantities up to 30g/L, yielding 32.4% of lipids of dry cell weight (DCW). Biodiesel production from Trichoderma reesei involved simple unit operations like filtration and ultrasonication, yet giving good lipid yield with desirable bio-diesel properties. Optimization of ultrasonication conditions was done to ensure maximum lipid extraction. SEM analysis of ultrasonicated samples showed distinct breakage of fungal hyphae. The lipids were found to contain 49...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549808/volatile-fatty-acid-recovery-by-anaerobic-fermentation-from-blue-green-algae-effect-of-pretreatment
#11
Hyun Uk Cho, Hye Gyeong Kim, Young Mo Kim, Jong Moon Park
The aims of this study were to quantify how pretreatment affects production of volatile fatty acids (VFAs) from cyanobacterial biomass and production of subsequent microbial lipid by an oleaginous microorganism that uses the VFAs as carbon sources. The highest biomass solubilization was obtained using thermal-alkaline (th-alkaline) pretreatment (33.1%), followed by alkaline pretreatment (29.1%), and thermal pretreatment (7.2%), but the highest VFA yield was obtained using alkaline pretreatment (0.54±0.02g/gVS), followed by the untreated condition (0...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549804/the-efficient-clade-lactic-acid-bacteria-for-industrial-chemical-production
#12
REVIEW
Michael Sauer, Hannes Russmayer, Reingard Grabherr, Clemens K Peterbauer, Hans Marx
Lactic acid bacteria are well known to be beneficial for food production and, as probiotics, they are relevant for many aspects of health. However, their potential as cell factories for the chemical industry is only emerging. Many physiological traits of these microorganisms, evolved for optimal growth in their niche, are also valuable in an industrial context. Here, we illuminate these features and describe why the distinctive adaptation of lactic acid bacteria is particularly useful when developing a microbial process for chemical production from renewable resources...
May 23, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28549272/acute-toxicity-of-emerging-atmospheric-pollutants-from-wood-lignin-due-to-biomass-burning
#13
Maryline Pflieger, Ana Kroflič
Guaiacol (2-methoxyphenol) is an important atmospheric pollutant. It is the major component of wood lignin and is essentially emitted to the atmosphere during biomass burning. Its aging in the tropospheric aqueous phase leads to the generation of the following ring-retaining transformation products, also during nighttime: 4-nitroguaiacol, 6-nitroguaiacol, and dinitroguaiacol. This study presents the first toxicological data of guaiacol and its nitro derivatives and reveals their harmful potential for the ecosystem...
May 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28549254/comparative-early-stage-assessment-of-multiproduct-biorefinery-systems-an-application-to-the-isobutanol-platform
#14
Jonathan Moncada, John A Posada, Andrea Ramírez
An early stage assessment method is applied to the production of isobutanol from lignocellulosic biomass, and to three multiproduct portfolios from the conversion of isobutanol: Case 1: production of isobutyl acetate and glycerol tert-butyl ether (GTBE), Case 2: production of isobutyl acetate and ketones, and Case 3: production of isobutyl acetate alkanes. The method screens and compares each route with its equivalent petrochemical counterpart. The method is composed by different indicators involving economic and environmental aspects...
May 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549253/synechococcus-nidulans-from-a-thermoelectric-coal-power-plant-as-a-potential-co2-mitigation-in-culture-medium-containing-flue-gas-wastes
#15
Jessica Hartwig Duarte, Jorge Alberto Vieira Costa
This study evaluated the intermittent addition of coal flue gas wastes (CO2, SO2, NO and ash) into a Synechococcus nidulans LEB 115 cultivation in terms of growth parameters, CO2 biofixation and biomass characterization. The microalga from a coal thermoelectric plant showed tolerance up to 200ppm SO2 and NO, with a maximum specific growth rate of 0.18±0.03d(-)(1). The addition of thermal coal ash to the cultivation increased the Synechococcus nidulans LEB 115 maximum cell growth by approximately 1.3 times...
May 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549080/life-history-traits-influence-the-strength-of-distance-and-density-dependence-at-different-life-stages-of-two-amazonian-palms
#16
Juanita Choo, Cecilia Carasco, Patricia Alvarez-Loayza, Beryl B Simpson, Evan P Economo
Background and Aims: Natural enemies are known to be important in regulating plant populations and contributing to species coexistence (Janzen-Connell effects). The strength of Janzen-Connell effects (both distance- and density-effects) varies across species, but the life history traits that may mediate such a variation are not well understood. This study examined Janzen-Connell effects across the life stages (seed through adult stages) of two sympatric palm species with distinct phenologies and shade tolerances, two traits that may mediate the strength and timing of Janzen-Connell effects...
May 26, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28548166/biomass-involved-synthesis-of-n-substituted-benzofuro-2-3-d-pyrimidine-4-amines-and-biological-evaluation-as-novel-egfr-tyrosine-kinase-inhibitors
#17
Jianfei Sheng, Zhihong Liu, Ming Yan, Xuejing Zhang, Dejian Wang, Jun Xu, Ensheng Zhang, Yong Zou
Shikimic acid (1) is a renewable biomass which could be obtained sustainably through natural product isolation or metabolic engineering. Owing to its great potential in chemical conversion, the value-added utilization of this non-grain biomass has received much attention in recent years. Based on the established transformation route from shikimic acid (1) to methyl 3-dehydroshikimate (3-MDHS, 2) and to the multi-functionalized methyl 2-amino-3-cyanobenzofuran-5-carboxylate (3), we disclose a facile and transition metal-free method to access a series of N-substituted benzofuro[2,3-d]pyrimidine-4-amines in 63%-90% yields...
May 26, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28547917/sorption-reduction-coupled-gold-recovery-process-boosted-by-pycnoporus-sanguineus-biomass-uptake-pattern-and-performance-enhancement-via-biomass-surface-modification
#18
Chaohong Shi, Nengwu Zhu, Naixin Kang, Pingxiao Wu, Xiaoping Zhang, Yanhong Zhang
Biorecovery is emerging as a promising process to retrieve gold from secondary resources. The present study aimed to explore the uptake pattern of Pycnoporus sanguineus biomass for gold, identify the effective functional groups in gold recovery process, and thus further intensify the process via microbial surface modification. Results showed that P. sanguineus biomass could effectively recover gold with the formation of highly crystal AuNPs without any exogeneous electron donor. Under the conditions of various initial gold concentrations (1...
May 25, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28547813/salix-arctica-changes-root-distribution-and-nutrient-uptake-in-response-to-subsurface-nutrients-in-high-arctic-deserts
#19
Amanda L Guy, Sarah P Hardy, Steven D Mamet, Mitsuaki Ota, Eric G Lamb, Steven D Siciliano
Moisture is critical for plant success in polar deserts but not by the obvious pathway of reduced water stress. We hypothesized that an indirect, nutrient-linked, pathway resulting from unique water/frozen soil interactions in polar deserts creates nutrient-rich patches critical for plant growth. These nutrient-rich patches (diapirs) form deep in high arctic polar deserts soils from water accumulating at the permafrost freezing front and ultimately rising into the upper soil horizons through cryoturbated convective landforms (frost boils)...
May 26, 2017: Ecology
https://www.readbyqxmd.com/read/28547539/cultivation-of-scenedesmus-dimorphus-using-anaerobic-digestate-as-a-nutrient-medium
#20
Husam A Abu Hajar, R Guy Riefler, Ben J Stuart
In this study, the microalga Scenedesmus dimorphus was cultivated phototrophically using unsterilized anaerobic digestate as a nutrient medium. A bench-scale experiment was conducted by inoculating the microalga S. dimorphus with 0.05-10% dilutions of the anaerobic digestate supernatant. It was found that 1.25-2.5% dilutions, which is equivalent to 50-100 mg N/L total nitrogen concentrations and 6-12 mg P/L total phosphorus concentrations, provided sufficient nutrients to maximize the growth rate along with achieving high concentrations of algal biomass...
May 25, 2017: Bioprocess and Biosystems Engineering
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