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https://www.readbyqxmd.com/read/29236006/electricity-generation-through-a-photo-sediment-microbial-fuel-cell-using-algae-at-the-cathode
#1
B Neethu, M M Ghangrekar
Sediment microbial fuel cells (SMFCs) are bio-electrochemical devices generating electricity from redox gradients occurring across the sediment-water interface. Sediment microbial carbon-capture cell (SMCC), a modified SMFC, uses algae grown in the overlying water of sediment and is considered as a promising system for power generation along with algal cultivation. In this study, the performance of SMCC and SMFC was evaluated in terms of power generation, dissolved oxygen variations, sediment organic matter removal and algal growth...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29224103/sex-differences-and-role-of-estradiol-in-hypoglycemia-associated-counter-regulation
#2
Karen P Briski, Hussain N Alhamami, Ayed Alshamrani, Santosh K Mandal, Manita Shakya, Mostafa H H Ibrahim
Vital nerve cell functions, including maintenance of transmembrane voltage and information transfer, occur at high energy expense. Inadequate provision of the obligate metabolic fuel glucose exposes neurons to risk of dysfunction or injury. Clinical hypoglycemia rarely occurs in nondiabetic individuals but is an unfortunate regular occurrence in patients with type 1 or advanced insulin-treated type 2 diabetes mellitus. Requisite strict glycemic control, involving treatment with insulin, sulfonylureas, or glinides, can cause frequent episodes of iatrogenic hypoglycemia due to defective counter-regulation, including reduced glycemic thresholds and diminished magnitude of motor responses...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29154092/anoxic-biodegradation-of-triclosan-and-the-removal-of-its-antimicrobial-effect-in-microbial-fuel-cells
#3
Lu Wang, Yulei Liu, Chao Wang, Xiaodan Zhao, Gurumurthy Dummi Mahadeva, Yicheng Wu, Jun Ma, Feng Zhao
Triclosan (TCS) is an emerging organic contaminant in the environment. Here, the anoxic bio-degradation of TCS in microbial fuel cells (MFCs) was explored. It was found that anoxic biodegradation of TCS could be achieved in MFC, and the removal rate of TCS was accelerated after reactor acclimation. After 7 months of operation, 10mg/L TCS could be removed within 8days in MFCs. Fluorescence microscopy results revealed that the microbe cells in the reactors were intact, and the microbes were in active state. Flow cytometry test showed that the proliferation of inoculated microbe was higher in MFC effluent than that in TCS solution...
October 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29137930/mitigating-external-and-internal-cathode-fouling-using-a-polymer-bonded-separator-in-microbial-fuel-cells
#4
Wulin Yang, Ruggero Rossi, Yushi Tian, Kyoung-Yeol Kim, Bruce E Logan
Microbial fuel cell (MFC) cathodes rapidly foul when treating domestic wastewater, substantially reducing power production over time. Here a wipe separator was chemically bonded to an activated carbon air cathode using polyvinylidene fluoride (PVDF) to mitigate cathode fouling and extend cathode performance over time. MFCs with separator-bonded cathodes produced a maximum power density of 190 ± 30 mW m(-2) after 2 months of operation using domestic wastewater, which was ∼220% higher than controls (60 ± 50 mW m(-2)) with separators that were not chemically bonded to the cathode...
November 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29112795/bio-analytical-applications-of-microbial-fuel-cell-based-biosensors-for-onsite-water-quality-monitoring
#5
REVIEW
Ahmed ElMekawy, Hanaa M Hegab, Deepak Pant, Christopher P Saint
Globally, sustainable provision of high quality safe water is a major challenge of the 21(st) century. Various chemical and biological monitoring analytics are presently utilized to guarantee the availability of high quality water. However, these techniques still face some challenges including high costs, complex design and onsite and online limitations. The recent technology of utilising microbial fuel cell (MFC)-based biosensors holds outstanding potential for the rapid and real-time monitoring of water source quality...
November 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29109396/electricity-generation-from-digitally-printed-cyanobacteria
#6
Marin Sawa, Andrea Fantuzzi, Paolo Bombelli, Christopher J Howe, Klaus Hellgardt, Peter J Nixon
Microbial biophotovoltaic cells exploit the ability of cyanobacteria and microalgae to convert light energy into electrical current using water as the source of electrons. Such bioelectrochemical systems have a clear advantage over more conventional microbial fuel cells which require the input of organic carbon for microbial growth. However, innovative approaches are needed to address scale-up issues associated with the fabrication of the inorganic (electrodes) and biological (microbe) parts of the biophotovoltaic device...
November 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/29101531/investigating-the-underlying-mechanism-of-saccharomyces-cerevisiae-in-response-to-ethanol-stress-employing-rna-seq-analysis
#7
Ruoyun Li, Guotong Xiong, Shukun Yuan, Zufang Wu, Yingjie Miao, Peifang Weng
Saccharomyces cerevisiae has been widely used for wine fermentation and bio-fuels production. A S. cerevisiae strain Sc131 isolated from tropical fruit shows good fermentation properties and ethanol tolerance, exhibiting significant potential in Chinese bayberry wine fermentation. In this study, RNA-sequence and RT-qPCR was used to investigate the transcriptome profile of Sc131 in response to ethanol stress. Scanning Electron Microscopy were carried out to observe surface morphology of yeast cells. Totally, 937 genes were identified differential expressed, including 587 up-regulated and 350 down-regulated genes, after 4-h ethanol stress (10% v/v)...
November 3, 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29089935/design-optimization-and-application-of-small-molecule-biosensor-in-metabolic-engineering
#8
REVIEW
Yang Liu, Ye Liu, Meng Wang
The development of synthetic biology and metabolic engineering has painted a great future for the bio-based economy, including fuels, chemicals, and drugs produced from renewable feedstocks. With the rapid advance of genome-scale modeling, pathway assembling and genome engineering/editing, our ability to design and generate microbial cell factories with various phenotype becomes almost limitless. However, our lack of ability to measure and exert precise control over metabolite concentration related phenotypes becomes a bottleneck in metabolic engineering...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29065460/flotation-assembly-of-large-area-ultrathin-mwcnt-nanofilms-for-construction-of-bioelectrodes
#9
Andrew J Gross, Jules L Hammond, Michael Holzinger, Serge Cosnier
We report a simple, versatile, and rapid method for the fabrication of optically-transparent large-area carbon nanotube (CNT) films via flotation assembly. After solvent-induced assembly, floating films were transferred to a flat supporting substrate to form conductive and transparent CNT film electrodes. The resulting electrodes, with uniform 40 ± 20 nm multi-walled CNT (MWCNT) layers, were characterized by electrochemical and microscopy methods. The flotation method does not require specialized thin-film instrumentation and avoids the need for surfactants and pre-oxidized CNTs which can hamper electrochemical performance...
October 21, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29044893/tsynthetic-klebsiella-pneumoniae-shewanella-oneidensis-consortium-enables-glyc-erol-fed-high-performance-microbial-fuel-cells
#10
Feng Li, Changji Yin, Liming Sun, Yuanxiu Li, Xuewu Guo, Hao Song
Microbial fuel cell (MFC) is an eco-friendly bio-electrochemical system that uses mi-croorganism as biocatalyst to convert biomass into electricity. Glycerol, as a waste in the biodiesel refinery processes, is an appealing substrate for MFC. Nevertheless, glycerol cannot be utilized as carbon source by well-known exoelectrogens such as Shewanella oneidensis. Herein, to generate electricity by rapidly harnessing glycerol, we rationally constructed a Klebsiella pneumoniae-Shewanella oneidensis microbial consortium to efficiently harvest electricity from glycerol, in which K...
October 18, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/29038251/stress-introduction-rate-alters-benefit-of-acrab-tolc-efflux-pumps
#11
Ariel M Langevin, Mary J Dunlop
Stress tolerance studies are typically conducted in an all-or-none fashion. However, in realistic settings-such as in clinical or metabolic engineering applications-cells may encounter stresses at different rates. As such, how cells tolerate stress may depend on its rate of appearance. To address this, we study how the rate of introduction affects bacterial stress tolerance by focusing on a key mechanism for stress response. Efflux pumps, such as AcrAB-TolC from Escherichia coli, are membrane transporters well known for their ability to export a wide variety of substrates, including antibiotics, signaling molecules, and biofuels...
October 16, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/29027469/bucking-the-current-trend-in-bioelectrochemical-systems-a-case-for-bioelectroanalytics
#12
Thomas William Seviour, Jamie Hinks
Turning wastewater directly into electricity is alluring, widespread use of microbial fuel cells (MFCs) to achieve this at industrial scale appears increasingly unlikely despite intense research efforts lasting over a decade. Such endeavors have not been futile, however, and game-changing discoveries have resulted from these well-intentioned, scientifically rigorous but ultimately frustrated attempts to resolve the Waste-Energy dichotomy. The appeal of MFCs is largely of conceptual elegance rather than financial competitiveness, based on the green ideal that bacteria can be turned into cost effective bio-batteries...
October 13, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28991805/a-bio-electrochemical-membrane-system-for-more-sustainable-wastewater-treatment-with-mno2-pani-modified-stainless-steel-cathode-and-photosynthetic-provision-of-dissolved-oxygen-by-algae
#13
Qiao Yang, Yang Lin, Lifen Liu, Fenglin Yang
A competitive sewage treatment technology should meet the standard of water quality requirement and accomplish recovery of potential energy. This study presents such a new system, with coupled membrane bioreactor-microbial fuel cell features, which can not only treat wastewater, but also recovers energy from wastewater by electricity generation, and form a new resource by photosynthesis while providing the dissolved oxygen by algae. Specifically, in the system, the MnO2/polyaniline is used to modify the stainless steel mesh and to function well as system membrane and cathode, with satisfactory filtration and catalysis performance...
October 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28990602/self-sustainable-high-power-density-bio-solar-cells-for-lab-on-a-chip-applications
#14
Lin Liu, Seokheun Choi
A microfluidic lab-on-a-chip system that generates its own power is essential for stand-alone, independent, self-sustainable point-of-care diagnostic devices to work in limited-resource and remote regions. Miniaturized biological solar cells (or micro-BSCs) can be the most suitable power source for those lab-on-a-chip applications because the technique resembles the earth's natural ecosystem - living organisms work in conjunction with non-living components of their environment to create a self-assembling and self-maintaining system...
November 7, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28989864/flux-balance-analysis-indicates-that-methane-is-the-lowest-cost-feedstock-for-microbial-cell-factories
#15
Austin D Comer, Matthew R Long, Jennifer L Reed, Brian F Pfleger
The low cost of natural gas has driven significant interest in using C1 carbon sources (e.g. methane, methanol, CO, syngas) as feedstocks for producing liquid transportation fuels and commodity chemicals. Given the large contribution of sugar and lignocellulosic feedstocks to biorefinery operating costs, natural gas and other C1 sources may provide an economic advantage. To assess the relative costs of these feedstocks, we performed flux balance analysis on genome-scale metabolic models to calculate the maximum theoretical yields of chemical products from methane, methanol, acetate, and glucose...
December 2017: Metabolic Engineering Communications
https://www.readbyqxmd.com/read/28968542/the-plasticity-of-cyanobacterial-carbon-metabolism
#16
REVIEW
Wei Xiong, Melissa Cano, Bo Wang, Damien Douchi, Jianping Yu
This opinion article aims to raise awareness of a fundamental issue which governs sustainable production of biofuels and bio-chemicals from photosynthetic cyanobacteria. Discussed is the plasticity of carbon metabolism, by which the cyanobacterial cells flexibly distribute intracellular carbon fluxes towards target products and adapt to environmental/genetic alterations. This intrinsic feature in cyanobacterial metabolism is being understood through recent identification of new biochemical reactions and engineering on low-throughput pathways...
September 28, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28948777/enzymatic-fuel-cell-based-self-powered-homogeneous-immunosensing-platform-via-target-induced-glucose-release-an-appealing-alternative-strategy-for-turn-on-melamine-assay
#17
Chengcheng Gu, Panpan Gai, Ting Hou, Haiyin Li, Changhui Xue, Feng Li
Enzymatic fuel cell (EFC)-based self-powered biosensors have attracted considerable attention because of their unique feature of no need for extra power sources during the entire detection process, which endows them with the merits of simplicity, rapidness, low cost, anti-interference, and ease of use. Herein, we proposed, for the first time, an EFC-based self-powered homogeneous immunosensing platform by integrating the target-induced biofuel release and bioconjugate immunoassay for ultrasensitive melamine (ME) detection...
October 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28917780/quantifying-biodegradable-organic-matter-in-polluted-water-on-the-basis-of-coulombic-yield
#18
Yuan Liu, Ai-Xue Tuo, Xiao-Jun Jin, Xiang-Zhong Li, Hong Liu
Biodegradable organic matter (BOM) in polluted water plays a key role in various biological purification technologies. The five-day biochemical oxygen demand (BOD5) index is often used to determine the amount of BOM. However, standard BOD5 assays, centering on dissolved oxygen detection, have long testing times and often show severe deviation (error ≥ 15%). In the present study, the coulombic yield (Q) of a bio-electrochemical degradation process was determined, and a new index for BOM quantification was proposed...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28876262/enhancing-biodegradation-and-energy-generation-via-roughened-surface-graphite-electrode-in-microbial-desalination-cell
#19
Atieh Ebrahimi, Daryoush Yousefi Kebria, Ghasem Najafpour Darzi
The microbial desalination cell (MDC) is known as a newly developed technology for water and wastewater treatment. In this study, desalination rate, organic matter removal and energy production in the reactors with and without desalination function were compared. Herein, a new design of plain graphite called roughened surface graphite (RSG) was used as the anode electrode in both microbial fuel cell (MFC) and MDC reactors for the first time. Among the three type of anode electrodes investigated in this study, RSG electrode produced the highest power density and salt removal rate of 10...
September 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28834386/metallic-bionanocatalysts-potential-applications-as-green-catalysts-and-energy-materials
#20
Lynne E Macaskie, Iryna P Mikheenko, Jacob B Omajai, Alan J Stephen, Joseph Wood
Microbially generated or supported nanocatalysts have potential applications in green chemistry and environmental application. However, precious (and base) metals biorefined from wastes may be useful for making cheap, low-grade catalysts for clean energy production. The concept of bionanomaterials for energy applications is reviewed with respect to potential fuel cell applications, bio-catalytic upgrading of oils and manufacturing 'drop-in fuel' precursors. Cheap, effective biomaterials would facilitate progress towards dual development goals of sustainable consumption and production patterns and help to ensure access to affordable, reliable, sustainable and modern energy...
September 2017: Microbial Biotechnology
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