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https://www.readbyqxmd.com/read/28214969/attached-and-suspended-denitrifier-communities-in-pristine-limestone-aquifers-harbor-high-fractions-of-potential-autotrophs-oxidizing-reduced-iron-and-sulfur-compounds
#1
M Herrmann, S Opitz, R Harzer, K U Totsche, K Küsel
Oxygen and nitrate availability as well as the presence of suitable organic or inorganic electron donors are strong drivers of denitrification; however, the factors influencing denitrifier abundance and community composition in pristine aquifers are not well understood. We explored the denitrifier community structure of suspended and attached groundwater microorganisms in two superimposed limestone aquifer assemblages with contrasting oxygen regime in the Hainich Critical Zone Exploratory (Germany). Attached communities were retrieved from freshly crushed parent rock material which had been exposed for colonization in two groundwater wells (12...
February 18, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28214695/the-effects-of-atmospheric-pressure-cold-plasma-treatment-on-microbiological-physical-chemical-and-sensory-characteristics-of-vacuum-packaged-beef-loin
#2
A Bauer, Y Ni, S Bauer, P Paulsen, M Modic, J L Walsh, F J M Smulders
Effects on vacuum packaged and non-packaged beef longissimus samples exposed to atmospheric cold plasma (ACP) generated at different powers were studied over a 10day period of vacuum-, and a subsequent 3day period of aerobic storage. Exposure of non-covered beef samples under high power ACP conditions resulted in increased a*, b*, Chroma and Hue values, but ACP treatment of packaged loins did not impact colour (L*, a*, b*, Chroma, Hue), lipid peroxidation, sarcoplasmic protein denaturation, nitrate/nitrite uptake, or myoglobin isoform distribution...
February 8, 2017: Meat Science
https://www.readbyqxmd.com/read/28214440/achieving-short-cut-nitrification-and-denitrification-in-modified-intermittently-aerated-constructed-wetland
#3
Jie Hou, Ling Xia, Tao Ma, Yiqing Zhang, Yiyong Zhou, Xugang He
This study aim to enhance nitrogen removal performance via shifting nitrogen removal pathway from nitrate to nitrite pathway. It was demonstrated that nitrite pathway was successfully and stably achieved in CWs by using modified intermittent aeration control with aeration 20min/non-aeration 100min and reducing DO concentration during aeration, nitrite in the effluent could accumulate to over 70% of the total oxidized nitrogen. Q-PCR analysis showed that nitrifying microbial communities were optimized under the alternating anoxic and aerobic conditions, ammonia oxidizing bacteria increased from 7...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28213650/alleviation-of-water-and-osmotic-stress-induced-changes-in-nitrogen-metabolizing-enzymes-in-triticum-aestivum-l-cultivars-by-potassium
#4
Mohammad Abass Ahanger, Megha Tittal, Rayees Ahmad Mir, R M Agarwal
Present communication reports laboratory and pot experiments conducted to study the influence of water and osmotic stress on nitrogen uptake and metabolism in two wheat (Triticum aestivum L) cultivars with and without potassium supplementation. Polyethylene glycol 6000-induced osmotic stress/restricted irrigation caused a considerable decline in the activity of nitrate reductase, glutamate synthase, alanine and aspartate aminotransferases, and glutamate dehydrogenase. Potassium considerably improved nitrogen metabolism under normal water supply conditions and also resulted in amelioration of the negative impact of water and osmotic stresses indicating that potassium supplementation can be used as a potential tool for enhancing the nitrogen use efficiency in wheat for exploiting its genetic potential...
February 17, 2017: Protoplasma
https://www.readbyqxmd.com/read/28213625/8-nitro-cgmp-a-novel-protein-reactive-cnmp-and-its-emerging-roles-in-autophagy
#5
Hirokazu Arimoto, Daiki Takahashi
Nitric oxide (NO) raises the intracellular 3',5'-cyclic guanosine monophosphate (cGMP) level through the activation of soluble guanylate cyclase and, in the presence of reactive oxygen species (ROS), reacts with biomolecules to produce nitrated cGMP derivatives. 8-Nitro-cGMP was the first endogenous cGMP derivative discovered in mammalian cells (2007) and was later found in plant cells. Among the six nitrogen atoms in this molecule, the one in the nitro group (NO2) comes from NO. This chapter asserts that this newly found cGMP is undoubtedly one of the major physiological cNMPs...
February 18, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28213337/effect-of-advanced-oxidation-on-n-nitrosodimethylamine-ndma-formation-and-microbial-ecology-during-pilot-scale-biological-activated-carbon-filtration
#6
Dong Li, Ben Stanford, Eric Dickenson, Wendell O Khunjar, Carissa L Homme, Erik J Rosenfeldt, Jonathan O Sharp
Water treatment combining advanced oxidative processes with subsequent exposure to biological activated carbon (BAC) holds promise for the attenuation of recalcitrant pollutants. Here we contrast oxidation and subsequent biofiltration of treated wastewater effluent employing either ozone or UV/H2O2 followed by BAC during pilot-scale implementation. Both treatment trains largely met target water quality goals by facilitating the removal of a suite of trace organics and bulk water parameters. N-nitrosodimethylamine (NDMA) formation was observed in ozone fed BAC columns during biofiltration and to a lesser extent in UV/H2O2 fed columns and was most pronounced at 20 min of empty bed contact time (EBCT) when compared to shorter EBCTs evaluated...
February 2, 2017: Water Research
https://www.readbyqxmd.com/read/28213284/synthesis-of-hetero-annulated-isoxazolo-pyrido-and-pyrimido-carbazoles-screened-for-in%C3%A2-vitro-antitumor-activity-and-structure-activity-relationships-a-novel-2-amino-4-3-bromo-4-methoxyphenyl-8-chloro-11h-pyrimido-4-5-a-carbazole-as-an-antitumor-agent
#7
Karunanidhi Murali, Hazel A Sparkes, Karnam Jayarampillai Rajendra Prasad
Claisen-Schmidt condensation of 2,3,4,9-tetrahydro-1H-carbazol-1-one with 3-bromo-4-methoxy benzaldehyde afforded the 2-(3'-bromo-4'-methoxybenzylidene)-2,3,4,9-tetrahydro-1H-carbazol-1-one 3. Compound 3 was allowed to react with different organic reactants, hydroxylamine hydrochloride, malononitrile and guanidine nitrate through condensation cum cycloaddition reactions to afford a series of the respective novel hetero annulated carbazoles such as isoxazolo-, pyrido- and pyrimido carbazoles. The structures of the compounds were established by FT-IR, (1)H NMR, (13)C NMR, X-ray diffraction and elemental analysis...
February 7, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28212873/temperament-and-character-personality-dimensions-in-nitrate-tilt-induced-vasovagal-syncope-patients
#8
Vincenzo Russo, Ahmed AlTurki, Anna Rago, Riccardo Proietti, Guillaume Chaussé, Alessio Maria Monteleone, Pasquale Scognamiglio, Palmiero Monteleone, Gerardo Nigro
INTRODUCTION: Vasovagal syncope (VVS) is a clinical syndrome characterized by transient loss of consciousness and postural tone that is due to a temporary and spontaneously self-terminating global cerebral hypoperfusion. It is known that personality modulates the individual's sensitivity to stressors, and emotional arousal and psychologic uncertainty are conditions contributing to vasodepressor syncope. Therefore it is postulated that personality characteristics of VVS patients could have a role in the pathophysiology of VVS...
February 14, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28212609/exogenous-glutamate-rapidly-induces-the-expression-of-genes-involved-in-metabolism-and-defense-responses-in-rice-roots
#9
Chia-Cheng Kan, Tsui-Yun Chung, Hsin-Yu Wu, Yan-An Juo, Ming-Hsiun Hsieh
BACKGROUND: Glutamate is an active amino acid. In addition to protein synthesis and metabolism, increasing evidence indicates that glutamate may also function as a signaling molecule in plants. Still, little is known about the nutritional role of glutamate and genes that are directly regulated by glutamate in rice. RESULTS: Exogenous glutamate could serve as a nitrogen nutrient to support the growth of rice seedlings, but it was not as effective as ammonium nitrate or glutamine...
February 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28212518/zno-tio2-composites-for-photocatalytic-inactivation-of-escherichia-coli
#10
Diptipriya Sethi, Ramasamy Sakthivel
ZnO/TiO2 composite was synthesized from zinc nitrate and anatase TiO2 by using the incipient wet impregnation method followed by calcination at 350°C for 3h. These samples were characterized through several characterization techniques. XRD peaks confirms the presence of single anatase phase of titania in the 3 and 6wt% ZnO/TiO2 composite, whereas in all other composites both anatase titania and zinc oxide phases were found. UV-visible (diffuse) reflectance spectra show titania and ZnO absorbs in the ultraviolet (UV) region whereas ZnO/TiO2 absorbs both UV and visible light...
February 11, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28212514/removal-mechanism-of-selenite-by-fe3o4-precipitated-mesoporous-magnetic-carbon-microspheres
#11
Jianwei Lu, Fenglian Fu, Zecong Ding, Na Li, Bing Tang
A mesoporous composite of magnetic carbon microspheres (MCMSs) was synthesized via introducing Fe3O4 nanoscale particles to the surface of carbon microspheres (CMSs) by coprecipitation. Scanning electron microscopy and transmission electron microscopy showed the Fe3O4 nanoscale particles were dispersedly immobilized on the surface of CMSs. The MCMSs demonstrated effective removal of selenite (Se(IV)) from wastewater. MCMSs showed the regular pattern where the lower pH value, the lower residual Se(IV) concentration...
February 14, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28212344/green-microwave-assisted-combustion-synthesis-of-zinc-oxide-nanoparticles-with-citrullus-colocynthis-l-schrad-characterization-and-biomedical-applications
#12
Susan Azizi, Rosfarizan Mohamad, Mahnaz Mahdavi Shahri
In this paper, a green microwave-assisted combustion approach to synthesize ZnO-NPs using zinc nitrate and Citrullus colocynthis (L.) Schrad (fruit, seed and pulp) extracts as bio-fuels is reported. The structure, optical, and colloidal properties of the synthesized ZnO-NP samples were studied. Results illustrate that the morphology and particle size of the ZnO samples are different and depend on the bio-fuel. The XRD results revealed that hexagonal wurtzite ZnO-NPs with mean particle size of 27-85 nm were produced by different bio-fuels...
February 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28211995/far-uv-annealed-inkjet-printed-in2o3-semiconductor-layers-for-tfts-on-flexible-pen-substrate
#13
Jaakko Henrik Leppäniemi, Kim Eiroma, Himadri Majumdar, Ari Alastalo
The inkjet-printing process of precursor solutions containing In-nitrate dissolved in 2-methoxyethanol is optimized using ethylene glycol as a co-solvent that allows the stabilization of the droplet formation, leading to a robust, repeatable printing process. The inkjet-printed precursor films are then converted to In2O3 semiconductors at flexible-substrate-compatible low-temperatures (150 - 200 °C) using combined far ultraviolet (FUV) exposure at ~160 nm and thermal treatment. The compositional nature of the precursor-to-metal oxide conversion is studied using grazing incidence X-ray diffraction (GIXRD), X-ray reflectivity (XRR) and Fourier transform infrared (FTIR) spectroscopy that indicate that amorphous, high density (up to 5...
February 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28211338/enhancement-of-the-adsorption-capacity-of-the-light-weight-expanded-clay-aggregate-surface-for-the-metronidazole-antibiotic-by-coating-with-mgo-nanoparticles-studies-on-the-kinetic-isotherm-and-effects-of-environmental-parameters
#14
Ebrahim Mohammadi Kalhori, Tariq J Al-Musawi, Esmaeil Ghahramani, Hossein Kazemian, Mansur Zarrabi
The synthesized MgO nanoparticles were used to coat the light-weight expanded clay aggregates (LECA) and as a metronidazole (MNZ) adsorbent. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier-transformed infrared (FTIR) techniques were employed to study the surface morphology and characteristics of the adsorbents. MgO/LECA clearly revealed the advantages of the nanocomposite particles, showing high specific surface area (76.12 m(2)/g), significant adsorption sites and functional groups...
February 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28211267/efficient-and-selective-uptake-of-tco4-by-a-cationic-metal-organic-framework-material-with-open-ag-sites
#15
Daopeng Sheng, Lin Zhu, Chao Xu, Chengliang Xiao, Yanlong Wang, Yaxing Wang, Lanhua Chen, Juan Diwu, Jing Chen, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
99Tc is one of the most problematic radioisotopes in used nuclear fuel owing to its combined features of high fission yield, long half-life, and high environmental mobility. There are only a handful of functional materials that can remove TcO4- anion from aqueous solution and identifying for new, stable materials with high anion-exchange capacities, fast kinetics, and good selectivity remains a challenge. We report here an 8-fold interpenetrated three-dimensional cationic metal-organic framework material, SCU-100, which is assembled from a tetradentate neutral nitrogen-donor ligand and two-coordinate Ag+ cations as potential open metal sites...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28211107/a-randomized-comparative-evaluation-of-clinical-and-home-application-to-investigate-the-effectiveness-of-silver-nitrate-agno3-95-for-the-treatment-of-verruca-pedis
#16
Michael Concannon, Lisa Keogh, John Stephenson, Grace Parfitt, James Forrest
OBJECTIVE: To investigate the clinical effectiveness of silver nitrate (95%) for the treatment of verruca pedis comparing professional and self-application treatments. METHODS: A single-centre, two-armed randomized evaluation was conducted at a University podiatry clinic. A total of 113 participants (101 analysed) with verruca pedis were included. Participants were randomized to either a clinical group, where silver nitrate was applied by a healthcare professional or a home group, where silver nitrate was self-applied...
February 17, 2017: International Journal of Pharmacy Practice
https://www.readbyqxmd.com/read/28208287/highly-uniform-gold-nanobipyramids-for-ultrasensitive-colorimetric-detection-of-influenza-virus
#17
Shaohua Xu, Wenjun Ouyang, Peisi Xie, Yi Lin, Bin Qiu, Zhenyu Lin, Guonan Chen, Longhua Guo
Gold nanoparticles (AuNPs) have been frequently utilized for the construction of diverse colorimetric biosensors. Normally, AuNPs with sharp edges could have better sensitivity. However, the poor monodipersity of AuNPs with sharp edges seriously confines their utility for colorimetric biosensing. Herein, we demonstrate the utility of highly uniform gold nanobipyramids (Au NBPs) for ultrasensitive colorimetric detection of H5N1 virus. The proposed method is based on the fact that alkaline phosphatase (ALP) could catalyze the decomposition of 4-aminophenyl phosphate (4-APP) to generate 4-aminophenol (4-AP), which would then reduce silver nitrate to metal silver and then deposited on Au NBPs...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28207830/influence-of-nutrient-signals-and-carbon-allocation-on-the-expression-of-phosphate-and-nitrogen-transporter-genes-in-winter-wheat-triticum-aestivum-l-roots-colonized-by-arbuscular-mycorrhizal-fungi
#18
Hui Tian, Xiaolei Yuan, Jianfeng Duan, Wenhu Li, Bingnian Zhai, Yajun Gao
Arbuscular mycorrhizal (AM) colonization of plant roots causes the down-regulation of expression of phosphate (Pi) or nitrogen (N) transporter genes involved in direct nutrient uptake pathways. The mechanism of this effect remains unknown. In the present study, we sought to determine whether the expression of Pi or N transporter genes in roots of winter wheat colonized by AM fungus responded to (1) Pi or N nutrient signals transferred from the AM extra-radical hyphae, or (2) carbon allocation changes in the AM association...
2017: PloS One
https://www.readbyqxmd.com/read/28206766/copper-assisted-direct-nitration-of-cyclic-ketones-with-ceric-ammonium-nitrate-for-the-synthesis-of-tertiary-%C3%AE-nitro-%C3%AE-substituted-scaffolds
#19
Zhi-Qiang Zhang, Tao Chen, Fu-Min Zhang
An efficient and direct Cu-assisted nitrating approach to create synthetically valuable and challenging tertiary α-nitro-α-substituted moieties has been developed using ceric ammonium nitrate as a nitrating reagent, oxidant, and Lewis acid. Notably, the commonly used clinical drug ketamine was smoothly synthesized in four steps.
February 16, 2017: Organic Letters
https://www.readbyqxmd.com/read/28203456/concurrent-beet-juice-and-carbohydrate-ingestion-influence-on-glucose-tolerance-in-obese-and-nonobese-adults
#20
Joseph W Beals, Scott E Binns, Janelle L Davis, Gregory R Giordano, Anna L Klochak, Hunter L Paris, Melani M Schweder, Garrett L Peltonen, Rebecca L Scalzo, Christopher Bell
Insulin resistance and obesity are characterized by low nitric oxide (NO) bioavailability. Insulin sensitivity is improved with stimulation of NO generating pathways. Consumption of dietary nitrate (NO3(-)) increases NO formation, via NO3(-) reduction to nitrite (NO2(-)) by oral bacteria. We hypothesized that acute dietary nitrate (beet juice) ingestion improves insulin sensitivity in obese but not in nonobese adults. 12 nonobese (body mass index: 26.3 ± 0.8 kg/m(2) (mean ± SE)) and 10 obese adults (34...
2017: Journal of Nutrition and Metabolism
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