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https://www.readbyqxmd.com/read/28214696/unraveling-the-influence-of-the-cod-sulfate-ratio-on-organic-matter-removal-and-methane-production-from-the-biodigestion-of-sugarcane-vinasse
#1
Luma Sayuri Mazine Kiyuna, Lucas Tadeu Fuess, Marcelo Zaiat
Throughout the sugarcane harvest, it is common for sulfate to accumulate in the vinasse of sugar and ethanol plants. However, little is known regarding the influence of sulfate on the anaerobic digestion (AD) of vinasse, which may lead to severe performance losses. This study assessed the influence of various COD/sulfate ratios (12.0, 10.0 and 7.5) on both COD removal and methane (CH4) production from sugarcane vinasse AD. Batch assays were conducted in thermophilic conditions. At a COD/sulfate ratio of 7.5, CH4 production was 35% lower compared with a ratio of 12...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28214688/h2s-causes-contraction-and-relaxation-of-major-arteries-of-the-rabbit
#2
Martin Caprnda, Tawar Qaradakhi, Joanne L Hart, Nazarii Kobyliak, Radka Opatrilova, Peter Kruzliak, Anthony Zulli
OBJECTIVE: Cardiovascular disease (CVD) caused by atherosclerosis remains a worldwide burden. Hydrogen sulfide is a promising new therapeutic avenue for the treatment of CVD, however reports show exogenous H2S has both vasodilator and vasoconstrictor effects depending on organ examined, and in vitro studies in animal models which are not resistant to developing atherosclerosis are limited. We sought to determine if rabbit arteries constricted or dilated to hydrogen sulfide. MATERIAL AND METHODS: The aorta, carotid, renal and iliac arteries were harvested from New Zealand White rabbits (n=4) and subjected to a concentration response curve to the fast H2S releaser NaHS...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28213735/microalgae-based-advanced-municipal-wastewater-treatment-for-reuse-in-water-bodies
#3
REVIEW
Jing-Han Wang, Tian-Yuan Zhang, Guo-Hua Dao, Xue-Qiao Xu, Xiao-Xiong Wang, Hong -Ying Hu
Reuse of secondary municipal effluent from wastewater treatment plants in water bodies could effectively alleviate freshwater resource shortage. However, excessive nutrients must be efficiently removed to prevent eutrophication. Compared with other means of advanced wastewater treatment, microalgae-based processes display overwhelming advantages including efficient and simultaneous N and P removal, no requirement of additional chemicals, O2 generation, CO2 mitigation, and potential value-added products from harvested biomass...
February 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28213035/influence-of-electro-activated-solutions-of-weak-organic-acid-salts-on-microbial-quality-and-overall-appearance-of-blueberries-during-storage
#4
Viacheslav Liato, Riadh Hammami, Mohammed Aïder
The aim of this work was to study the potential of diluted electro-activated solutions of weak organic acid salts (potassium acetate, potassium citrate and calcium lactate) to extend the shelf life of blueberries during post-harvest storage. The sanitizing capacity of these solutions was studied against pathogenic bacteria Listeria monocytogenes and E. coli O157:H7 as well as phytopathogenic fungi A. alternata, F. oxysporum and B. cinerea. The results showed that a 5-min treatment of inoculated blueberries with electro-activated solutions resulted in a 4 log CFU/g reduction in Listeria monocytogenes for all solutions...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28212485/efficient-upconverting-multiferroic-core-shell-photocatalysts-visible-to-near-infrared-photon-harvesting
#5
Jianming Zhang, Yue Huang, Lei Jin, Federico Rosei, Fiorenzo Vetrone, Jerome P Claverie
We report the two-step synthesis of a core@shell nanohybrid material for visible-to-near-infrared (NIR) photocatalysis. The core is constituted of NaGdF4:Er(3+), Yb(3+) upconverting nanoparticles (UCNPs). A bismuth ferrite (BFO) shell is assembled around the UCNPs via a hydrothermal process. The photocatalytic degradation assays of organic compounds of methylene orange and 4-chlorophenol reveal that core@shell nanostructures possess remarkably enhanced reaction activity under visible and NIR irradiation, compared to the BFO powder alone and the BFO-UCNP mixture...
February 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28211893/superior-adsorption-and-photoinduced-carries-transfer-behaviors-of-dandelion-shaped-bi2s3-mos2-experiments-and-theory
#6
Mengjiao Li, Junyong Wang, Peng Zhang, Qinglin Deng, Jinzhong Zhang, Kai Jiang, Zhigao Hu, Junhao Chu
The enhanced light-harvesting capacity and effective separation of photogenerated carriers in fantastic hierarchical heterostructures enjoy striking attention for potential applications in the field of solar cells and photocatalysis. A three-dimensional (3D) dandelion-shaped hierarchical Bi2S3 microsphere compactly decorated with wing-shaped few layered MoS2 lamella (D-BM) was fabricated via a facile hydrothermal self-assembly process. Especially, polyethylene glycol (PEG) has been proven as the vital template to form D-BM microsphere...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211005/resequencing-and-annotation-of-the-nostoc-punctiforme-attc-29133-genome-facilitating-biofuel-and-high-value-chemical-production
#7
Luis E Moraes, Matthew J Blow, Erik R Hawley, Hailan Piao, Rita Kuo, Jennifer Chiniquy, Nicole Shapiro, Tanja Woyke, James G Fadel, Matthias Hess
Cyanobacteria have the potential to produce bulk and fine chemicals and members belonging to Nostoc sp. have received particular attention due to their relatively fast growth rate and the relative ease with which they can be harvested. Nostoc punctiforme is an aerobic, motile, Gram-negative, filamentous cyanobacterium that has been studied intensively to enhance our understanding of microbial carbon and nitrogen fixation. The genome of the type strain N. punctiforme ATCC 29133 was sequenced in 2001 and the scientific community has used these genome data extensively since then...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28210833/energy-transfer-in-anabaena-variabilis-filaments-adapted-to-nitrogen-depleted-and-nitrogen-enriched-conditions-studied-by-time-resolved-fluorescence
#8
Aya Onishi, Shimpei Aikawa, Akihiko Kondo, Seiji Akimoto
Nitrogen is among the most important nutritious elements for photosynthetic organisms such as plants, algae, and cyanobacteria. Therefore, nitrogen depletion severely compromises the growth, development, and photosynthesis of these organisms. To preserve their integrity under nitrogen-depleted conditions, filamentous nitrogen-fixing cyanobacteria reduce atmospheric nitrogen to ammonia, and self-adapt by regulating their light-harvesting and excitation energy-transfer processes. To investigate the changes in the primary processes of photosynthesis, we measured the steady-state absorption and fluorescence spectra and time-resolved fluorescence spectra (TRFS) of whole filaments of the nitrogen-fixing cyanobacterium Anabaena variabilis at 77 K...
February 16, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28197039/surgical-illustration-of-en-bloc-dual-kidney-transplant-from-a-16-month-old-brain-dead-donor-to-an-adult-recipient
#9
Vikas Jain, Saurabh Jain, Paras Singhal, Suman Lata Nayak, Rajendra P Mathur
Transplantable organs from pediatric donors have been contributing significantly to donor pool worldwide. Pediatric donors are excellent resources that should be procured whenever available, and with the recent increase in deceased donations in India, more pediatric donors will be available for organ harvesting. We share a rare instance of multi-organ harvesting from a 16-month old brain dead donor and implanting both kidneys en-bloc in an adult male, while liver went to a 4-year old child. The report provides the surgical illustration of salient steps of transplanting both kidneys from pediatric donor into an adult, in an en-bloc manner...
January 2017: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/28195198/the-gadolinium-gd-3-and-tin-sn-4-co-doped-bifeo3-nanoparticles-as-new-solar-light-active-photocatalyst
#10
Syed Irfan, Syed Rizwan, Yang Shen, Liangliang Li, Asfandiyar, Sajid Butt, Ce-Wen Nan
The process of photocatalysis is appealing to huge interest motivated by the great promise of addressing current energy and environmental issues through converting solar light directly into chemical energy. However, an efficient solar energy harvesting for photocatalysis remains a critical challenge. Here, we reported a new full solar spectrum driven photocatalyst by co-doping of Gd(3+) and Sn(4+) into A and B-sites of BiFeO3 simultaneously. The co-doping of Gd(3+) and Sn(4+) played a key role in hampering the recombination of electron-hole pairs and shifted the band-gap of BiFeO3 from 2...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194675/effect-of-soil-contamination-with-fluorine-on-the-yield-and-content-of-nitrogen-forms-in-the-biomass-of-crops
#11
Radosław Szostek, Zdzisław Ciećko
The research was based on a pot experiment, in which the response of eight species of crops to soil contamination with fluorine was investigated. In parallel, some inactivating substances were tested in terms of their potential use for the neutralization of the harmful influence of fluorine on plants. The response of crops to soil contamination with fluorine was assessed according to the volume of biomass produced by aerial organs and roots as well as their content of N-total, N-protein, and N-NO3(-). The following crops were tested: maize, yellow lupine, winter oilseed rape, spring triticale, narrow-leaf lupine, black radish, phacelia, and lucerne...
February 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28191939/phytochemical-profiles-of-new-red-fleshed-apple-varieties-compared-with-traditional-and-new-white-fleshed-varieties
#12
David Bars-Cortina, Alba Macià, Ignasi Iglesias, Maria Paz Romero, Maria José Motilva
This study is an exhaustive chemical characterization of the phenolic compounds, triterpenes, and organic and ascorbic acids in red-fleshed apple varieties obtained by different breeding programs and using five traditional and new white-fleshed apple cultivars as reference. To carry out these analyses, solid-liquid extraction (SLE) and ultraperformance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) were used. The results showed that the red-fleshed apples contained, in either the flesh or peel, higher amounts of phenolic acids (chlorogenic acid), anthocyanins (cyanidin-3-O-galactoside), dihydrochalcones (phloretin xylosyl glucoside), and organic acids (malic acid) but a lower amount of flavan-3-ols than the white-fleshed apples...
February 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28188423/photosynthetic-antenna-engineering-to-improve-crop-yields
#13
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
#14
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/28185240/a-staging-system-for-correct-phenotype-interpretation-of-mouse-embryos-harvested-on-embryonic-day-14-e14-5
#15
Stefan H Geyer, Lukas Reissig, Julia Rose, Robert Wilson, Fabrice Prin, Dorota Szumska, Ramiro Ramirez-Solis, Catherine Tudor, Jacqui White, Timothy J Mohun, Wolfgang J Weninger
We present a simple and quick system for accurately scoring the developmental progress of mouse embryos harvested on embryonic day 14 (E14.5). Based solely on the external appearance of the maturing forelimb, we provide a convenient way to distinguish six developmental sub-stages. Using a variety of objective morphometric data obtained from the commonly used C57BL/6N mouse strain, we show that these stages correlate precisely with the growth of the entire embryo and its organs. Applying the new staging system to phenotype analyses of E14...
February 9, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28185041/variety-in-excitation-energy-transfer-processes-from-phycobilisomes-to-photosystems-i-and-ii
#16
Yoshifumi Ueno, Shimpei Aikawa, Kyosuke Niwa, Tomoko Abe, Akio Murakami, Akihiko Kondo, Seiji Akimoto
The light-harvesting antennas of oxygenic photosynthetic organisms capture light energy and transfer it to the reaction centers of their photosystems. The light-harvesting antennas of cyanobacteria and red algae, called phycobilisomes (PBSs), supply light energy to both photosystem I (PSI) and photosystem II (PSII). However, the excitation energy transfer processes from PBS to PSI and PSII are not understood in detail. In the present study, the energy transfer processes from PBS to PSs in various cyanobacteria and red algae were examined in vivo by selectively exciting their PSs or PBSs, and measuring the resulting picosecond to nanosecond time-resolved fluorescences...
February 9, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28180999/biotic-conversion-of-sulphate-to-sulphide-and-abiotic-conversion-of-sulphide-to-sulphur-in-a-microbial-fuel-cell-using-cobalt-oxide-octahedrons-as-cathode-catalyst
#17
Pritha Chatterjee, M M Ghangrekar, Surampalli Rao, Senthil Kumar
Varying chemical oxygen demand (COD) and sulphate concentrations in substrate were used to determine reaction kinetics and mass balance of organic matter and sulphate transformation in a microbial fuel cell (MFC). MFC with anodic chamber volume of 1 L, fed with wastewater having COD of 500 mg/L and sulphate of 200 mg/L, could harvest power of 54.4 mW/m(2), at a Coulombic efficiency of 14%, with respective COD and sulphate removals of 90 and 95%. Sulphide concentration, even up to 1500 mg/L, did not inhibit anodic biochemical reactions, due to instantaneous abiotic oxidation to sulphur, at high inlet sulphate...
February 8, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28178953/human-rights-violations-in-organ-procurement-practice-in-china
#18
Norbert W Paul, Arthur Caplan, Michael E Shapiro, Charl Els, Kirk C Allison, Huige Li
BACKGROUND: Over 90% of the organs transplanted in China before 2010 were procured from prisoners. Although Chinese officials announced in December 2014 that the country would completely cease using organs harvested from prisoners, no regulatory adjustments or changes in China's organ donation laws followed. As a result, the use of prisoner organs remains legal in China if consent is obtained. DISCUSSION: We have collected and analysed available evidence on human rights violations in the organ procurement practice in China...
February 8, 2017: BMC Medical Ethics
https://www.readbyqxmd.com/read/28177581/harvesting-hydrogen-gas-from-air-pollutants-with-an-un-biased-gas-phase-photo-electrochemical-cell
#19
Sammy W Verbruggen, Myrthe Van Hal, Tom Bosserez, Jan Rongé, Birger Hauchecorne, Johan A Martens, Silvia Lenaerts
The concept of an all-gas-phase photo-electrochemical cell (PEC) producing hydrogen gas from volatile organic contaminated gas and light is presented. Without applying any external bias, organic contaminants are degraded and hydrogen gas is produced in separate electrode compartments. The system works most efficiently with organic pollutants in inert carrier gas. In the presence of oxygen gas, the cell performs less efficiently but still significant photocurrents are generated, showing the cell can be run on organic contaminated air...
February 8, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28177248/surface-passivation-of-gan-nanowires-for-enhanced-photoelectrochemical-water-splitting
#20
Purushothaman Varadhan, Hui-Chun Fu, Davide Priante, Jose Ramon Duran Retamal, Chao Zhao, Mohamed Ebaid, Tien Khee Ng, Idris A Ajia, Somak Mitra, Iman S Roqan, Boon S Ooi, Jr-Hau He
Hydrogen production via photoelectrochemical water-splitting is a key source of clean and sustainable energy. The use of one-dimensional nanostructures as photoelectrodes is desirable for photoelectrochemical water-splitting applications due to the ultra-large surface areas, lateral carrier extraction schemes, and superior light-harvesting capabilities. However, the unavoidable surface states of nanostructured materials create additional charge carrier trapping centers and energy barriers at the semiconductor-electrolyte interface, which severely reduce the solar-to-hydrogen conversion efficiency...
February 8, 2017: Nano Letters
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