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https://www.readbyqxmd.com/read/28222383/simultaneous-biogas-upgrading-and-centrate-treatment-in-an-outdoors-pilot-scale-high-rate-algal-pond
#1
Esther Posadas, David Marín, Saúl Blanco, Raquel Lebrero, Raúl Muñoz
The bioconversion of biogas to biomethane coupled to centrate treatment was evaluated in an outdoors pilot scale high rate algal pond interconnected to an external CO2-H2S absorption column (AC) via settled broth recirculation. CO2-removal efficiencies ranged from 50 to 95% depending on the alkalinity of the cultivation broth and environmental conditions, while a complete H2S removal was achieved regardless of the operational conditions. A maximum CH4 concentration of 94% with a limited O2 and N2 stripping was recorded in the upgraded biogas at recycling liquid/biogas ratios in the AC of 1 and 2...
February 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28222298/vascular-morphogenesis-an-integrin-and-fibronectin-highway
#2
Hellyeh Hamidi, Johanna Ivaska
A new study shows that endothelial cells use synaptic-like machinery to control polarized secretion and deposition of newly synthesised fibronectin. This process is coupled to active integrin recycling to the same locations and is fundamental for vascular development in zebrafish.
February 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28221781/the-relationship-between-organic-loading-and-effects-on-fish-reproduction-for-pulp-mill-effluents-across-canada
#3
Pierre H Martel, Brian I O'Connor, Tibor G Kovacs, Michael R Van Den Heuvel, Joanne L Parrott, Mark E McMaster, Deborah L MacLatchy, Glen J Van Der Kraak, L Mark Hewitt
This study builds upon the work of a multiagency consortium tasked with determining cost effective solutions for the effects of pulp mill effluents on fish reproduction. A laboratory fathead minnow egg production test and chemical characterization tools were used to benchmark eighty-one effluents from twenty mills across Canada, representing the major pulping, bleaching and effluent treatment technologies. For Kraft and mechanical pulp mills, effluents containing less than 20 mg/L BOD5 were found to have the greatest probability of having no effects...
February 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28220791/quantification-of-re-absorption-and-re-emission-processes-to-determine-photon-recycling-efficiency-in-perovskite-single-crystals
#4
Yanjun Fang, Haotong Wei, Qingfeng Dong, Jinsong Huang
Photon recycling, that is, iterative self-absorption and re-emission by the photoactive layer itself, has been speculated to contribute to the high open-circuit voltage in several types of high efficiency solar cells. For organic-inorganic halide perovskites that have yielded highly efficient photovoltaic devices, however, it remains unclear whether the photon recycling effect is significant enough to improve solar cell efficiency. Here we quantitatively evaluate the re-absorption and re-emission processes to determine photon recycling efficiency in hybrid perovskite with its single crystals by measuring the ratio of the re-emitted photons to the initially excited photons, which is realized by modulating their polarization to differentiate them...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28220385/selective-adsorption-and-recycle-of-cu-2-from-aqueous-solution-by-modified-sugarcane-bagasse-under-dynamic-condition
#5
Jia-Dong Chen, Jun-Xia Yu, Fen Wang, Jia-Qi Tang, Yue-Fei Zhang, Yuan-Lai Xu, Ru-An Chi
Tetraethylenepentamine modified sugarcane bagasse was prepared and applied to test its feasibility in removing and recovering Cu(2+) from wastewater under dynamic condition. Results showed that the Cu(2+) could be selectively absorbed from wastewater by the modified SCB fixed bed column. To understand the adsorption mechanism, Cd(2+) had been selected as the model interfering ion to investigate how co-ions influence the adsorption of Cu(2+) on the sorbent. It was observed that the adsorption capacity of the sorbent for Cu(2+) (0...
February 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28219320/microorganism-and-agricultural-based-biosorbents-towards-removal-of-cadmium-from-waste-water-an-overview
#6
Souvik Pal, Subhankar Mukherjee, Nabarun Bhattacharyya
BACKGROUND: Non-degradable and persistent nature of Cadmium (Cd) poses high toxicity to human, plants and animals. Several industrial processes generated wastes are the main anthropogenic pathway through which Cd enters into the environment. Although, World Health Organization (WHO) has set the limit of Cd in drinking water is 0.005 mg L-1, the industrial activities release much higher concentrations of metal ions to the water stream than the prescribed limits, which leads to the increasing health hazards and environmental pollution...
February 20, 2017: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/28219298/microwave-assisted-surface-modification-for-the-separation-of-polycarbonate-from-polymethylmethacrylate-and-polyvinyl-chloride-waste-plastics-by-flotation
#7
Luoluo Huang, Hui Wang, Chongqing Wang, Junyao Zhao, Bo Zhang
Microwave-assisted potassium permanganate modification (MPPM) was used for the flotation separation of polycarbonate (PC) from polyvinyl chloride (PVC) and polymethylmethacrylate (PMMA) waste plastics. The separation process was optimized by investigating the potassium permanganate concentration, treatment time, flotation time and frother concentration. MPPM selectively reduced the flotation recovery of PC. The optimum conditions were determined to be: potassium permanganate concentration, 2 mM/L; treatment time, 1 min; frother concentration, 17...
March 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28219053/a-facile-approach-for-surface-alteration-of-pseudomonas-putida-i3-by-supplying-k2so4-into-growth-medium-enhanced-removal-of-pb-ii-from-aqueous-solution
#8
Xingjian Xu, Haiyan Li, Quanying Wang, Dandan Li, Xuerong Han, Hongwen Yu
A new sight of obtaining a high efficient biosorbent by supplying specific salts into bacterial growth medium was investigated in this study for Pb(II). Among a series of salts including Na2SO4, Na2S2O3, KCl, and K2SO4, the highest Pb(II) removal efficiency was observed by psychrotrophilic Pseudomonas putida I3 grown in the presence of 30g/L K2SO4 (KSI3-30) with biosorption capacity of 62.89mg/g under cold condition (15°C), which was increased by 42.35% as compared to control (without any additive, RI3). This stimulation effect was ascribed to the increase of potassium and sulfur containing groups on KSI3-30 surface via metabolic dependent ways...
February 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28219034/preparation-of-core-shell-nanostructure-fe3o4-peg400-so3h-as-heterogeneous-and-magnetically-recyclable-nanocatalyst-for-one-pot-synthesis-of-substituted-pyrroles-by-paal-knorr-reaction-at-room-temperature
#9
Fahimeh Bonyasi, Malak Hekmati, Hojat Veisi
An efficient procedure has been proposed for the loading of sulfonic acid groups on the surface of polyethylene glycol 400 (PEG400)-encapsulated Fe3O4 nanoparticles to synthesize a core-shell Fe3O4@PEG400-SO3H nano catalyst. Surface functionalization of magnetic particles in such a way is a refined method of bridging the gap amongst heterogeneous and homogeneous catalysis. The procured nano catalyst was classified through Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), wavelength-dispersive X-ray spectroscopy (WDX), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), BET, and back titration...
February 13, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28218644/review-of-membranes-for-helium-separation-and-purification
#10
REVIEW
Colin A Scholes, Ujjal K Ghosh
Membrane gas separation has potential for the recovery and purification of helium, because the majority of membranes have selectivity for helium. This review reports on the current state of the research and patent literature for membranes undertaking helium separation. This includes direct recovery from natural gas, as an ancillary stage in natural gas processing, as well as niche applications where helium recycling has potential. A review of the available polymeric and inorganic membranes for helium separation is provided...
February 17, 2017: Membranes
https://www.readbyqxmd.com/read/28218271/beads-milling-of-waste-si-sawdust-into-high-performance-nanoflakes-for-lithium-ion-batteries
#11
Takatoshi Kasukabe, Hirotomo Nishihara, Katsuya Kimura, Taketoshi Matsumoto, Hikaru Kobayashi, Makoto Okai, Takashi Kyotani
Nowadays, ca. 176,640 tons/year of silicon (Si) (>4N) is manufactured for Si wafers used for semiconductor industry. The production of the highly pure Si wafers inevitably includes very high-temperature steps at 1400-2000 °C, which is energy-consuming and environmentally unfriendly. Inefficiently, ca. 45-55% of such costly Si is lost simply as sawdust in the cutting process. In this work, we develop a cost-effective way to recycle Si sawdust as a high-performance anode material for lithium-ion batteries...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216806/regional-distribution-and-losses-of-end-of-life-steel-throughout-multiple-product-life-cycles-insights-from-the-global-multiregional-matrace-model
#12
Stefan Pauliuk, Yasushi Kondo, Shinichiro Nakamura, Kenichi Nakajima
Substantial amounts of post-consumer scrap are exported to other regions or lost during recovery and remelting, and both export and losses pose a constraint to desires for having regionally closed material cycles. To quantify the challenges and trade-offs associated with closed-loop metal recycling, we looked at the material cycles from the perspective of a single material unit and trace a unit of material through several product life cycles. Focusing on steel, we used current process parameters, loss rates, and trade patterns of the steel cycle to study how steel that was originally contained in high quality applications such as machinery or vehicles with stringent purity requirements gets subsequently distributed across different regions and product groups such as building and construction with less stringent purity requirements...
January 2017: Resources, Conservation, and Recycling
https://www.readbyqxmd.com/read/28216154/the-effect-of-indatraline-on-angiogenesis-suppression-through-hif-1%C3%AE-mediated-vegf-inhibition
#13
Chih-Na Yen, Yoon Sun Cho, Ho Jeong Kwon
The present research reports a novel biological activity of indatraline, a compound clinically used as an antidepressant. We previously identified indatraline as an autophagy inducer. Autophagy is an intracellular catabolic pathway for degrading or recycling unnecessary organelles in response to cellular stress. Indatraline-mediated autophagy induction results from mTOR inhibition. The mTOR is a negative regulator of autophagy as well as a master regulator of angiogenesis. Angiogenesis defines the process by which new vessels are formed from pre-existing vascular tissues, providing nutrients to cancer cells, allowing rapid tumor progression...
February 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28215894/effect-of-dietary-roughage-level-on-chewing-activity-ruminal-ph-and-saliva-secretion-in-lactating-holstein-cows
#14
F G Jiang, X Y Lin, Z G Yan, Z Y Hu, G M Liu, Y D Sun, X W Liu, Z H Wang
Increasing dietary roughage level is a commonly used strategy to prevent subacute ruminal acidosis. We hypothesized that high-roughage diets could promote chewing activity, saliva secretion, and hence more alkaline to buffer rumen pH. To verify the hypothesis, 12 multiparous Holstein cows in mid-lactation were randomly allocated to 4 treatments in a triplicated 4 × 4 Latin square experiment with one cow in each treatment surgically fitted with a ruminal cannula. Treatments were diets containing 40, 50, 60, or 70% of roughage on a DM basis...
February 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28215579/mitochondrial-dna-maintenance-defects
#15
REVIEW
Ayman W El-Hattab, William J Craigen, Fernando Scaglia
The maintenance of mitochondrial DNA (mtDNA) depends on a number of nuclear gene-encoded proteins including a battery of enzymes forming the replisome needed to synthesize mtDNA. These enzymes need to be in balanced quantities to function properly that is in part achieved by exchanging intramitochondrial contents through mitochondrial fusion. In addition, mtDNA synthesis requires a balanced supply of nucleotides that is achieved by nucleotide recycling inside the mitochondria and import from the cytosol. Mitochondrial DNA maintenance defects (MDMDs) are a group of diseases caused by pathogenic variants in the nuclear genes involved in mtDNA maintenance resulting in impaired mtDNA synthesis leading to quantitative (mtDNA depletion) and qualitative (multiple mtDNA deletions) defects in mtDNA...
February 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28215151/iron-chelators-dictate-immune-cells-inflammatory-ability-potential-adjuvant-therapy-for-ibd
#16
Marcello Chieppa, Vanessa Galleggiante, Grazia Serino, Monica Massaro, Angelo Santino
BACKGROUND: The importance of hemoproteins for life lies largely in their iron-mediated chemical properties. In the human body, there are about 4 g of iron, a precious resource preserved by sophisticated recycling mechanisms. Iron is also important for pathogen growth, so it is not surprising that immune cells developed mechanisms to reduce iron availability in cases of inflammation. In healthy conditions, macrophages degrade hemoproteins and export iron, while if inflammation develops, they retain cytoplasmic iron to reduce extracellular iron concentrations...
February 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28215104/increased-eps15-homology-domain-1-and-rab11fip3-expression-regulate-breast-cancer-progression-via-promoting-epithelial-growth-factor-receptor-recycling
#17
Dandan Tong, Ya-Nan Liang, A A Stepanova, Yu Liu, Xiaobo Li, Letian Wang, Fengmin Zhang, N V Vasilyeva
Recent research indicates that the C-terminal Eps15 homology domain 1 is associated with epithelial growth factor receptor-mediated endocytosis recycling in non-small-cell lung cancer. The aim of this study was to determine the clinical significance of Eps15 homology domain 1 gene expression in relation to phosphorylation of epithelial growth factor receptor expression in patients with breast cancer. Primary breast cancer samples from 306 patients were analyzed for Eps15 homology domain 1, RAB11FIP3, and phosphorylation of epithelial growth factor receptor expression via immunohistochemistry...
February 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28213315/focal-adhesion-kinase-signaling-in-unexpected-places
#18
REVIEW
Elizabeth G Kleinschmidt, David D Schlaepfer
Focal adhesion kinase (FAK) is a cytoplasmic protein-tyrosine kinase first identified at extracellular matrix and integrin receptor cell adhesion sites and is a key regulator of cell movement. FAK is activated by a variety of stimuli. Herein, we discuss advances in conformational-associated FAK activation and dimerization mechanisms. Additionally, new roles have emerged for FAK signaling at cell adhesions, adherens junctions, endosomes, and the nucleus. In light of these new findings, we review how FAK activation at these sites is connected to the regulation of integrin recycling-activation, vascular permeability, cell survival, and transcriptional regulation, respectively...
February 14, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28213259/magnetic-non-magnetic-argan-press-cake-nanocellulose-for-the-selective-extraction-of-sudan-dyes-in-food-samples-prior-to-the-determination-by-capillary-liquid-chromatograpy
#19
Yassine Benmassaoud, María J Villaseñor, Rachid Salghi, Shehdeh Jodeh, Manuel Algarra, Mohammed Zougagh, Ángel Ríos
Two methods for the determination of Sudan dyes (Sudan I, Sudan II, Sudan III and Sudan IV) in food samples, by solid phase extraction - capillary liquid chromatography, are proposed. Both methods use nanocellulose (NC) extracted from bleached argan press cake (APC), as a nano-adsorbent recycled from an agricultural waste material. One of the methods involves the dispersion of NC in food sample extracts, along with the waste and eluents being separated by centrifugation. In the other method, NC was modified by magnetic iron nanoparticles before using it in the extraction of Sudan dyes...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28212011/a-fluorescent-anionic-mof-with-zn4-trz-2-chain-for-highly-selective-visual-sensing-of-contaminants-cr-iii-ion-and-tnp
#20
Xiao-Xia Jia, Ru-Xin Yao, Fu-Qiang Zhang, Xian-Ming Zhang
Heavy-metal ions and nitroaromatic substances are highly toxic and harmful to human health and the ecological environment. It is an urgent issue to selectively detect and capture these toxic substances. By introducing the triazole ligand to the π-conjugated aromatic carboxylate system and borrowing the organic template open framework idea, a stable fluorescent framework [Me2NH2]4[Zn6(qptc)3(trz)4]·6H2O (1) (H4qptc = terphenyl-2,5,2'5'-tetracarboxylic acid, trz = 1,2,4-triazole) has been successfully synthesized, which features Zn4(trz)2 chain-based 3D anionic structure with channels filled by [Me2NH2](+) cations...
February 17, 2017: Inorganic Chemistry
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